New piston-free pump head assembly

Abstract

Disclosed in the present application is a new piston-free pump head assembly, comprising a pump chamber having an opening at the upper end, wherein a resettable pump head is mounted in the pump chamber; a base cover configured to be mounted at a bottle mouth is mounted at the upper end of the pump chamber; and a first protruding ring is provided on the inner wall of the base cover, and abuts against the outer wall of the pump head, thereby sealing a mounting gap between the base cover and the pump head. When the pump head is pressed, air in the pump chamber enters a bottle through an air intake hole, and a liquid in the bottle is discharged through a liquid output tube and the pump head; and when the pump head is released, external air enters the pump chamber through an air replenishment channel, thereby forming a cycle. No additional piston structure is required, and on the basis of ensuring normal liquid discharge, the structure is optimized, the production and assembly process is simplified, manufacturing is easier, there is no need to worry about damage to a piston structure during mounting, and there is also no need to worry about unstable product functions caused by air leakage due to the deterioration of the sealing effect of the piston structure after repeated use.

Description

A novel pistonless pump head Technical Field

[0001] This application relates to a packaging container for storing liquids, and more particularly to a novel pistonless pump head. Background Technology

[0002] Lotion pumps are commonly used in daily cleaning and skincare products such as hand soap, shower gel, and facial cleanser to dispense lotion. They are widely used in daily life. Traditional pump heads consist of a pump chamber with a resettable pump head installed inside. Pressing the pump head forces air from the pump chamber into the bottle, thereby squeezing the liquid out of the bottle through the dispensing tube and pump head. During the pressing of the pump head, it is necessary to ensure that the air in the pump chamber flows towards the bottle, rather than flowing to the outside through the gap between the pump head and the pump chamber. Therefore, a sealing piston is usually installed between the pump head and the pump chamber. The movement of the sealing piston forces air from the pump chamber into the bottle. This structure still has room for improvement. Application content

[0003] To overcome the shortcomings of the existing technology, this application provides a novel pistonless pump head that does not require an additional piston structure. While ensuring normal liquid output, it optimizes the structure, simplifies the production and assembly process, and makes manufacturing easier. There is no need to worry about damage to the piston structure during installation, nor about the piston structure deteriorating in sealing performance after repeated use, resulting in air leakage and unstable product function.

[0004] The technical solution adopted by this application to solve its technical problem is to provide a novel pistonless pump head, including a pump chamber with an open top, and a resettable pump head installed in the pump chamber. The pump chamber is characterized by having a base cover installed at the upper end for mounting on a bottle mouth, and a first protruding ring provided on the inner wall of the base cover. The first protruding ring abuts against the outer wall of the pump head to seal the installation gap between the base cover and the pump head.

[0005] The base cover consists of an mounting part and a sealing part. The upper ends of the mounting part and the sealing part are connected by a connecting part. The first protruding ring is set on the inner wall of the sealing part. The mounting part is provided with a threaded part that is fixedly connected to the bottle mouth. The sealing part is inserted between the outer wall of the pump head and the inner wall of the pump chamber.

[0006] The inner wall of the pump chamber is provided with a second raised ring, which abuts against the outer side of the sealing part and seals the installation gap between the sealing part and the pump chamber.

[0007] The pump chamber opening extends outward with several first support plates arranged in a ring. The air supply channel includes an air supply gap formed between adjacent first support plates. A limiting ring is provided inside the base cover. After installation, the upper end face of the limiting ring is flush with the upper end face of the bottle mouth. An air inlet plate is installed between the limiting ring, the upper end face of the bottle mouth, and the bottom surface of the first support plate. Outside air passes through the gap between the base cover and the outer wall of the bottle mouth, and pushes open the air inlet plate. Then, it passes through the air supply gap and enters the bottle from the gap between the pump chamber and the inner wall of the bottle mouth.

[0008] The bottom of the pump chamber is equipped with a liquid outlet pipe. When the pump head is pressed, the air in the pump chamber enters the bottle through the air inlet, and the liquid in the bottle is discharged through the liquid outlet pipe and the pump head. When the pump head is released, the outside air enters the pump chamber through the air replenishment channel, forming a circulation.

[0009] The pump head is reset by a spring, which consists of a return spring and a liquid outlet nozzle reset by a preload spring. The liquid outlet nozzle is connected to the liquid outlet pipe. When the pump head is pressed, the preload spring is compressed, and the liquid outlet of the liquid outlet nozzle is connected to the liquid outlet section of the pump head.

[0010] The liquid outlet and the liquid outlet tube are connected by a return spring.

[0011] A connecting pipe is installed in the pump chamber, and the liquid outlet is connected to the liquid outlet pipe through the connecting pipe.

[0012] A second support plate is provided on the outside of the connecting tube, and the lower end of the return spring is fixed on the second support plate.

[0013] The lower end of the return spring is installed at the upper end of the connecting tube, and the liquid outlet is connected to the connecting tube through the return spring.

[0014] The reset spring is fitted on the outside of the pump head, with the upper end of the reset spring fixed to the upper end of the pump head and the lower end of the reset spring installed on the top surface of the base cover.

[0015] The spring has a through hole, and the pump head has an insert corresponding to the through hole. When in use, rotate the pump head to align the insert with the through hole.

[0016] The bottom of the pump chamber is equipped with an insertion slot, and the upper end of the outlet pipe is inserted into the insertion slot.

[0017] The pump head is equipped with a slider, and the pump chamber is equipped with a groove corresponding to the slider, and the slider is slidably installed in the groove.

[0018] A third protruding ring is provided on the lower outer side of the pump head. The third protruding ring is sealed and abutted against the inner wall of the pump chamber. When the pump head is pressed, a pneumatic spring is formed in the space between the pump chamber and the pump head, located between the first protruding ring and the third protruding ring.

[0019] The beneficial effects of this application are as follows: This application has a resettable pump head installed in the pump chamber, and a base cover for mounting on the bottle mouth is installed at the upper end of the pump chamber. The inner wall of the base cover is provided with a first protruding ring, which abuts against the outer wall of the pump head to seal the installation gap between the base cover and the pump head. When the pump head is pressed, the air in the pump chamber enters the bottle through the air inlet, and the liquid in the bottle is discharged through the liquid outlet pipe and the pump head. When the pump head is released, the outside air enters the pump chamber through the air replenishment channel to form a circulation. There is no need to set up an additional piston structure. On the basis of ensuring normal liquid discharge, the structure is optimized, the production and assembly process is simplified, and manufacturing is easier. There is no need to worry about the piston structure being damaged during installation, nor is there any need to worry about the sealing effect of the piston structure deteriorating after repeated use, resulting in air leakage and unstable product function. Attached Figure Description

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 is a schematic diagram of Example 1;

[0022] Figure 2 is a schematic diagram of Example 2;

[0023] Figure 3 is a schematic diagram of Example 3;

[0024] Figure 4 is a structural diagram of the pump chamber in Example 3;

[0025] Figure 5 is a schematic diagram of Example 4;

[0026] Figure 6 is one of the schematic diagrams of Example 5;

[0027] Figure 7 is a second schematic diagram of Example 5;

[0028] Figure 8 is a schematic diagram of Example 6;

[0029] Figure 9 is an enlarged view of A in Figure 1;

[0030] Figure 10 is a structural diagram of the spring;

[0031] Figure 11 is a structural diagram of the pump head. Detailed Implementation

[0032] Some embodiments of this application are described below with reference to the accompanying drawings.

[0033] Referring to Figures 1-11, this application discloses a novel pistonless pump head, comprising a pump chamber 1 with an open top, a resettable pump head 3 installed inside the pump chamber 1, and a base cover 4 for mounting on a bottle neck installed at the upper end of the pump chamber 1. A first protruding ring 5 is provided on the inner wall of the base cover 4, which abuts against the outer wall of the pump head 3 to seal the installation gap between the base cover 4 and the pump head 3. A liquid outlet pipe 7 is provided at the bottom of the pump chamber 1. When the pump head 3 is pressed, air in the pump chamber 1 enters the bottle through an air inlet 6, and liquid in the bottle is discharged through the liquid outlet pipe 7 and the pump head 3. When the pump head 3 is released, outside air enters the pump chamber through a replenishment channel, forming a circulation. This design eliminates the need for an additional piston structure, optimizes the structure, simplifies the production and assembly process, and makes manufacturing easier while ensuring normal liquid output. There is no need to worry about damage to the piston structure during installation, or about the piston structure's sealing effect deteriorating after repeated use, leading to air leakage and product instability.

[0034] Specifically, the base cover 4 consists of an installation part 8 and a sealing part 9. The upper ends of the installation part 8 and the sealing part 9 are connected by a connecting part 10. The first protruding ring 5 is disposed on the inner wall of the sealing part 9. The installation part 8 is provided with a threaded part that is fixedly connected to the bottle mouth. The sealing part 9 is inserted between the outer wall of the pump head 3 and the inner wall of the pump chamber 1.

[0035] Furthermore, the inner wall of the pump chamber 1 is provided with a second protruding ring 11, which abuts against the outer side of the sealing part 9 and seals the installation gap between the sealing part 9 and the pump chamber 1.

[0036] The first protruding ring 5 and the second protruding ring 11 respectively seal the installation gap between the base cover 4 and the pump head 3 and the installation gap between the sealing part 9 and the pump chamber 1, thereby effectively preventing the air in the pump chamber 1 from flowing towards the upper opening, ensuring that when the pump head 3 is pressed, the air in the pump chamber 1 can enter the bottle through the air inlet 6, thereby ensuring the liquid dispensing effect and avoiding the situation where no liquid is dispensed after pressing the pump head 3.

[0037] The pump chamber 1 has several first support plates 12 arranged in a ring extending outward from its opening. The air replenishment channel includes an air replenishment gap 13 formed between adjacent first support plates 12. A limiting ring 14 is provided inside the base cover 4. After installation, the upper end face of the limiting ring 14 is flush with the upper end face of the bottle mouth. An air inlet plate 15 is installed between the limiting ring 14, the upper end face of the bottle mouth, and the bottom surface of the first support plate 12. Outside air passes through the gap between the base cover 4 and the outer wall of the bottle mouth, and pushes open the air inlet plate 15. Then, it enters the bottle through the gap between the pump chamber 1 and the inner wall of the bottle mouth through the air replenishment gap 13 (as shown in Figure 7, B is the bottle mouth, and C is the air replenishment path diagram).

[0038] When replenishing air, the pump head 3 is reset, thereby increasing the space inside the pump head 3 and the pump chamber 1, forming a negative pressure state. The external air pushes open one end of the air inlet plate 15 near the limiting ring 14 (the other end is pressed tightly by the upper end face of the bottle mouth and the bottom surface of the first support plate 12, making it difficult to deform), so that the air enters the bottle through the air replenishment notch 13 from the gap between the pump chamber 1 and the inner wall of the bottle mouth.

[0039] In this embodiment, the connection point of the air supply channel is located at the air inlet plate 15. When the air inlet plate 15 is opened, the air supply channel is opened. When the pump head 3 and the pump chamber 1 return to atmospheric pressure, the bottom surface of the air inlet plate 15 abuts against the top surface of the limiting ring 14 again, thereby closing the air supply channel.

[0040] The pump head 3 is reset by a spring, which consists of a reset spring 2 and a liquid outlet 17 reset by a pre-compression spring 16. The liquid outlet 17 is connected to the liquid outlet pipe 7. When the pump head 3 is pressed, the pre-compression spring 16 is compressed, and the liquid outlet 19 of the liquid outlet 17 is connected to the liquid outlet section 20 of the pump head 3.

[0041] Example 1: Referring to Figure 1, the liquid outlet 17 and the liquid outlet pipe 7 are connected through the return spring 2. When the pump head 3 is pressed, the air between the return spring 2 and the pump chamber 1 enters the bottle through the air inlet 6, and the liquid can be dispensed normally.

[0042] The pump chamber 1 is also equipped with a guide cylinder 26, and the reset spring 2 is inserted into the guide cylinder 26. During installation, the spring is placed directly into the guide cylinder 26, and then the spring is initially compressed by installing corresponding components (such as the pump head 3, the base cover 4, etc.), thereby fixing the lower end of the reset spring 2 at the lower end of the guide cylinder 26. The installation is convenient and simple, and it can also prevent the spring from tilting. When the pump head 3 is pressed, the guide cylinder 26 can ensure that the spring will not shake when it is compressed.

[0043] Example 2: Referring to Figure 2, a connecting pipe 18 is provided in the pump chamber 1. The liquid outlet 17 and the liquid outlet pipe 7 are connected through the connecting pipe 18. The return spring 2 is sleeved on the outside of the connecting pipe 18 and installed at the bottom of the pump chamber 1. When the spring is installed, the connecting pipe 18 plays a guiding role and can also prevent the spring from tilting. When the pump head 3 is pressed, the liquid outlet 17 slides relative to the connecting pipe 18. The connecting pipe 18 can ensure that the spring will not shake when it is compressed.

[0044] Example 3: Referring to Figures 3 and 4, a second support plate 21 is provided on the outer side of the connecting pipe 18, and the lower end of the reset spring 2 is fixed on the second support plate 21. The difference from Example 2 is that the fixing position of the lower end of the reset spring 2 is different.

[0045] Example 4: Referring to Figure 5, the lower end of the return spring 2 is installed at the upper end of the connecting pipe 18. The liquid outlet 17 is connected to the connecting pipe 18 through the return spring 2, thereby reducing the overall length of the spring and reducing the possibility of wobbling when the spring is compressed.

[0046] Example 5: Referring to Figures 6 and 7, the return spring 2 is fitted on the outside of the pump head 3. The upper end of the return spring 2 is fixed to the upper end of the pump head 3, and the lower end of the return spring 2 is installed on the top surface of the base cover 4. In this example, the connecting pipe 18 is also provided in the pump chamber 1. When the pump head 3 is pressed, the liquid outlet 17 slides relative to the connecting pipe 18. The connecting pipe 18 can ensure that the spring will not shake when it is compressed.

[0047] Example 6: Referring to Figure 8, in this example, the spring consists only of a return spring 2 and a liquid outlet 17. When the pump head 3 is pressed, the return spring 2 is compressed, and the liquid outlet 17 moves upward relative to the pump head 3, thereby achieving communication between the liquid outlet 19 of the liquid outlet 17 and the liquid outlet 20 of the pump head 3. That is, the pump head 3 moves downward, and the spring shortens as a whole. However, the downward movement of the pump head 3 is greater than the overall shortening of the spring, thus achieving the effect of the liquid outlet 17 moving upward relative to the pump head 3.

[0048] The pump head 3 is equipped with a slider 22, and the pump chamber 1 has a corresponding groove 23. The slider 22 is slidably installed in the groove 23. The spring has a through hole 24, and the pump head 3 has an insertion part 25 corresponding to the through hole 24. During the first use, the slider 22 and the groove 23 are misaligned, and the insertion part 25 and the through hole 24 are also misaligned. At this time, the pump head 3 cannot be pressed down normally to prevent accidental pressing before sale, which would result in the product being in a used state. This can affect subsequent sales. When using the pump, rotate the pump head 3 to align the insert 25 with the through hole 24. At the same time, the slider 22 and the slide groove 23 will also be aligned. At this point, it can be used normally. In subsequent use, no additional rotation is required. If you need to prevent accidental pressing, you can rotate the pump head 3 again to avoid accidental pressing when carrying it out. For example, if it is placed in luggage, accidental pressing during the movement of luggage may cause liquid to flow out and wet the items in the luggage.

[0049] The bottom of the pump chamber 1 is provided with an insertion slot, and the upper end of the liquid outlet pipe 7 is inserted into the insertion slot. The lower end of the liquid outlet pipe 7 is set as a pointed tip to prevent the end of the liquid outlet pipe 7 from completely sticking to the inner wall of the bottle and blocking the liquid outlet pipe 7.

[0050] A third protruding ring 27 is provided on the outer side of the lower end of the pump head 3. The third protruding ring 27 seals against the inner wall of the pump chamber 1. When the pump head 3 is pressed, a pneumatic spring is formed in the space between the pump chamber 1 and the pump head 3, between the first protruding ring 5 and the third protruding ring 27, thus forming a sealed space. When this space increases, the internal air pressure is less than the atmospheric pressure. When the pump head 3 is released, the atmospheric pressure pushes the space to shrink, thereby improving the reset effect of the pump head 3.

Claims

1. A novel pistonless pump head, comprising a pump chamber (1) with an open top, wherein a resettable pump head (3) is installed within the pump chamber (1), characterized in that... The upper end of the pump chamber (1) is equipped with a base cover (4) for mounting on the bottle mouth. The inner wall of the base cover (4) is provided with a first protruding ring (5). The first protruding ring (5) abuts against the outer wall of the pump head (3) to seal the installation gap between the base cover (4) and the pump head (3).

2. The novel pistonless pump head according to claim 1, characterized in that... The base cover (4) consists of an installation part (8) and a sealing part (9). The upper ends of the installation part (8) and the sealing part (9) are connected by a connecting part (10). The first protruding ring (5) is disposed on the inner wall of the sealing part (9). The installation part (8) is provided with a threaded part that is fixedly connected to the bottle mouth. The sealing part (9) is inserted between the outer wall of the pump head (3) and the inner wall of the pump chamber (1).

3. The novel pistonless pump head according to claim 2, characterized in that... The inner wall of the pump chamber (1) is provided with a second protruding ring (11), which abuts against the outer side of the sealing part (9) and seals the installation gap between the sealing part (9) and the pump chamber (1).

4. The novel pistonless pump head according to claim 1, characterized in that... The pump chamber (1) has an opening that extends outward with several first support plates (12) arranged in a ring. The air supply channel includes an air supply gap (13) formed between adjacent first support plates (12). A limiting ring (14) is provided inside the base cover (4). After installation, the upper end face of the limiting ring (14) is flush with the upper end face of the bottle mouth. An air inlet plate (15) is installed between the limiting ring (14), the upper end face of the bottle mouth and the bottom face of the first support plate (12). Outside air passes through the gap between the base cover (4) and the outer wall of the bottle mouth, and pushes open the air inlet plate (15), and then enters the bottle through the gap between the pump chamber (1) and the inner wall of the bottle mouth via the air supply gap (13).

5. The novel pistonless pump head according to claim 1, characterized in that... The bottom of the pump chamber (1) is provided with a liquid outlet pipe (7). When the pump head (3) is pressed, the air in the pump chamber (1) enters the bottle through the air inlet (6), and the liquid in the bottle is discharged through the liquid outlet pipe (7) and the pump head (3). When the pump head (3) is released, the outside air enters the pump chamber through the air replenishment channel, forming a circulation.

6. The novel pistonless pump head according to claim 5, characterized in that... The pump head (3) is reset by a spring, which consists of a reset spring (2) and a liquid outlet (17) reset by a pre-compression spring (16). The liquid outlet (17) is connected to the liquid outlet pipe (7). When the pump head (3) is pressed, the pre-compression spring (16) is compressed, and the liquid outlet (19) of the liquid outlet (17) is connected to the liquid outlet part (20) of the pump head (3).

7. The novel pistonless pump head according to claim 6, characterized in that... The liquid outlet (17) and the liquid outlet pipe (7) are connected through the return spring (2).

8. The novel pistonless pump head according to claim 6, characterized in that... A connecting pipe (18) is provided in the pump chamber (1), and the liquid outlet (17) is connected to the liquid outlet pipe (7) through the connecting pipe (18).

9. The novel pistonless pump head according to claim 8, characterized in that... A second support plate (21) is provided on the outside of the connecting pipe (18), and the lower end of the reset spring (2) is fixed on the second support plate (21).

10. The novel pistonless pump head according to claim 8, characterized in that... The lower end of the reset spring (2) is installed at the upper end of the connecting pipe (18), and the liquid outlet (17) is connected to the connecting pipe (18) through the reset spring (2).

11. The novel pistonless pump head according to claim 6, characterized in that... The reset spring (2) is fitted on the outside of the pump head (3), the upper end of the reset spring (2) is fixed to the upper end of the pump head (3), and the lower end of the reset spring (2) is installed on the top surface of the base cover (4).

12. The novel pistonless pump head according to claim 6, characterized in that... The spring is provided with a through hole (24), and the pump head (3) is provided with an insert (25) corresponding to the through hole (24). When in use, the pump head (3) is rotated so that the insert (25) is aligned with the through hole (24).

13. The novel pistonless pump head according to claim 5, characterized in that... The bottom of the pump chamber (1) is provided with an insertion slot, and the upper end of the liquid outlet pipe (7) is inserted into the insertion slot.

14. The novel pistonless pump head according to claim 1, characterized in that... The pump head (3) is provided with a slider (22), and the pump chamber (1) is provided with a groove (23) corresponding to the slider (22), and the slider (22) is slidably installed in the groove (23).

15. The novel pistonless pump head according to claim 1, characterized in that... A third protruding ring (27) is provided on the outer side of the lower end of the pump head (3). The third protruding ring (27) is sealed and abutted against the inner wall of the pump chamber (1). When the pump head (3) is pressed, a pneumatic spring is formed between the pump chamber (1) and the pump head (3) in the space between the first protruding ring (5) and the third protruding ring (27).

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