Pump head capable of preventing liquid dispensing due to accidental press

Abstract

A pump head capable of preventing liquid dispensing due to accidental press, comprising a bottle cap (1) adapted to be arranged on a bottle body. A pump chamber (2) is provided in the bottle cap (1); a resettable elastic bladder (3) is installed in the pump chamber (2); a resettable pre-compression bladder (4) is arranged at the top of the elastic bladder (3); a liquid dispensing nozzle (5) is installed on the pre-compression bladder (4); a liquid outlet pipe (6) is arranged on the elastic bladder (3); a liquid outlet (7) is formed at the upper end of the liquid outlet pipe (6); a liquid dispensing cavity (8) is formed in the liquid dispensing nozzle (5); when the liquid dispensing nozzle (5) is pressed, the pre-compression bladder (4) is compressed, and the liquid dispensing cavity (8) is aligned with the liquid outlet (7), so that the liquid dispensing channel of the pump head is open, allowing normal liquid dispensing. The present pump head can effectively prevent the problem of liquid leakage caused by accidentally pressing the bottle body.

Description

A pump head for preventing accidental pressure discharge of liquid Technical Field

[0001] The present application relates to a packaging bottle for storing and transporting lotion, etc., and in particular to a pump head for preventing accidental pressure discharge of liquid. Background Art

[0002] Due to their elegant design and ease of use, lotion pumps have been widely used in industries such as cosmetics and pharmaceuticals. Existing lotion pumps are factory-installed with a threaded connection between the pump head and the pump chamber. This prevents the pump head from being pressed before delivery to the user, preventing leakage. Once the bottle arrives, the user must first twist the pump head to eject it before normal use. This design is difficult to reverse, meaning that once the bottle is used, the pump head is difficult to re-tighten into the pump chamber. The lotion pump's discharge channel remains unobstructed, requiring only a simple press of the pump head for dispensing. To prevent accidental presses during daily use, a cover is commonly used. However, since the cover is separate from the bottle, losing the cover eliminates the pressure-resistant barrier. Furthermore, external forces can compress the bottle during transportation, leading to leakage, a problem that cannot be addressed with a cover.

[0003] Therefore, this application is studied and proposed in response to the above problems. Application Contents

[0004] The purpose of this application is to overcome the deficiencies of the prior art and provide a pump head that prevents accidental pressure discharge of liquid.

[0005] This application is achieved through the following technical solutions:

[0006] A pump head for preventing accidental pressure discharge of liquid includes a bottle cap for being set on a bottle body, a pump chamber is set in the bottle cap, a resettable elastic airbag is installed in the pump chamber, a resettable pre-pressure airbag is set on the top of the elastic airbag, and a liquid discharge nozzle is installed on the pre-pressure airbag; a liquid discharge tube is set on the elastic airbag, a liquid outlet is set at the upper end of the liquid discharge tube, and a liquid discharge cavity is set on the liquid discharge nozzle. When the liquid discharge nozzle is pressed, the pre-pressure airbag is compressed, and the liquid discharge cavity is aligned with the liquid outlet, so that the liquid discharge channel of the pump head is connected.

[0007] An elastic dome cover is provided on the top of the liquid outlet pipe, and the top surface of the elastic dome cover abuts against the top surface of the liquid outlet cavity.

[0008] The side wall of the pre-compression air bag is provided with a plurality of exhaust holes.

[0009] The pre-pressurized airbag is a closed structure.

[0010] A sleeve portion communicating with the liquid outlet cavity is provided in the liquid outlet nozzle, and the sleeve portion is sleeved on the outer side of the liquid outlet pipe.

[0011] Sealing rings are provided outside the liquid outlet pipe at the upper and lower ends of the liquid outlet, and the sealing rings are sealed and connected to the sleeve portion.

[0012] A switch slot is provided on the outer side of the liquid outlet nozzle, and a limiting protrusion is provided in the bottle cap corresponding to the switch slot, and the limiting protrusion is inserted into the switch slot.

[0013] A limiting groove is provided at the inner bottom of the pump chamber, and a limiting plug is provided at the bottom of the elastic airbag corresponding to the limiting groove, and the limiting plug is inserted into the limiting groove.

[0014] A one-way valve is arranged in the liquid outlet channel.

[0015] The bottle cap and the pump chamber are separate structures. The upper end surface of the pump chamber is provided with a gas replenishing port. When installed on the bottle, the gas replenishing port is blocked by a sealing gasket, so that the gas replenishing port forms a one-way air valve.

[0016] The upper end surface of the pump chamber is provided with an outer ring portion, the air supply port is provided on the outer ring portion, the sealing gasket is installed on the bottom surface of the outer ring portion, and the sealing gasket includes an abutment ring located on the outside and a sealing portion located on the inside for sealing the air supply port. After installation, the upper end surface of the bottle mouth of the bottle is in contact with the abutment ring.

[0017] A sealing ring is provided on the outer side of the upper end of the elastic airbag, and a plurality of through holes for communicating the inner and outer sides are provided on the side wall of the elastic airbag.

[0018] Compared with the prior art, this application has the following advantages:

[0019] The present application provides a pump chamber in the bottle cap, a resettable elastic airbag is installed in the pump chamber, a resettable pre-pressure airbag is provided on the top of the elastic airbag, and a liquid outlet nozzle is installed on the pre-pressure airbag; a liquid outlet tube is provided on the elastic airbag, a liquid outlet port is provided on the upper end of the liquid outlet tube, and a liquid outlet cavity is provided on the liquid outlet nozzle. When the liquid outlet nozzle is pressed, the pre-pressure airbag is compressed, and the liquid outlet cavity is aligned with the liquid outlet port, so that the liquid outlet channel of the pump head is connected, and liquid can be discharged normally, thereby effectively preventing the problem of liquid leakage caused by accidental pressure on the bottle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 is a structural diagram of the present application; Figure 2 is a cross-sectional view of the first embodiment; Figure 3 is a cross-sectional view of the second embodiment; Figure 4 is a cross-sectional view of the third embodiment; Figure 5 is a cross-sectional view of the fourth embodiment; Figure 6 is a structural diagram of the elastic airbag; Figure 7 is a structural diagram of the liquid outlet; Figure 8 is a structural diagram of the bottle cap and the pump chamber; Figure 9 is an exploded view of the bottle cap, the pump chamber and the sealing gasket; Figure 10 is an enlarged view of A in Figure 2; Figure 11 is an enlarged view of B in Figure 4. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present application in detail with reference to the accompanying drawings.

[0023] Referring to Figures 1 to 11, a pump head for preventing accidental pressure discharge of liquid includes a bottle cap 1 for being set on a bottle body, a pump chamber 2 is set in the bottle cap 1, a resettable elastic airbag 3 is installed in the pump chamber 2, a resettable pre-pressure airbag 4 is set on the top of the elastic airbag 3, and a liquid outlet nozzle 5 is installed on the pre-pressure airbag 4; a liquid outlet tube 6 is provided on the elastic airbag 3, a liquid outlet port 7 is provided on the upper end of the liquid outlet tube 6, and a liquid outlet cavity 8 is provided on the liquid outlet nozzle 5. When the liquid outlet nozzle 5 is pressed, the pre-pressure airbag 4 is compressed, and the liquid outlet cavity 8 is aligned with the liquid outlet port 7, so that the liquid outlet channel of the pump head is connected, so that liquid can be discharged normally, thereby effectively preventing the problem of liquid leakage caused by accidental pressure on the bottle body.

[0024] An elastic dome cover 9 is provided on the top of the liquid outlet pipe 6, and the top surface of the elastic dome cover 9 is in contact with the top surface of the liquid outlet cavity 8. When the liquid outlet nozzle 5 is pressed, the elastic dome cover 9 is squeezed between the top surface of the liquid outlet cavity 8 and the liquid outlet pipe 6 to produce deformation, and the liquid outlet cavity 8 is aligned with the liquid outlet 7. When the liquid outlet nozzle 5 is released, the elastic dome cover 9 is immediately restored, so that the positions of the liquid outlet cavity 8 and the liquid outlet 7 are staggered, so that the liquid outlet channel of the pump head is closed, and the rebound force generated by the deformation recovery of the elastic dome cover 9 is used. The combination of the pre-pressurized airbag 4 and the rebound force of the pre-pressurized airbag 4 makes the closing time of the liquid outlet channel of the pump head faster, avoiding the situation that the liquid outlet channel is not closed, so that external air enters the bottle through the liquid outlet channel instead of entering from the air replenishing port designed in the pump head, resulting in the next time the liquid outlet nozzle 5 cannot discharge liquid normally; at the same time, it avoids the situation that when the bottle body is squeezed, the internal air pressure increases and the elastic airbag 3 is stretched upward, thereby aligning the liquid outlet cavity 8 with the liquid outlet 7, and the liquid outlet channel of the pump head is connected (as shown in Figures 2 and 3).

[0025] The bottle cap 1 and the pump chamber 2 are separate structures. The upper end surface of the pump chamber 2 is provided with a gas replenishment port 25. When installed on the bottle, the gas replenishment port 25 is blocked by a sealing gasket 24, so that the gas replenishment port 25 forms a one-way air valve.

[0026] The upper end surface of the pump chamber 2 is provided with an outer ring portion 26, the air supply port 25 is provided on the outer ring portion 26, and the sealing gasket 24 is installed on the bottom surface of the outer ring portion 26. The sealing gasket 24 includes an abutment ring 27 located on the outside and a sealing portion 28 located on the inside for sealing the air supply port 25. After installation, the upper end surface of the bottle mouth of the bottle is in contact with the abutment ring 27.

[0027] The first embodiment: the lower end of the elastic airbag 3 is sealed from the bottom surface of the pump chamber 2. When the liquid outlet nozzle 5 is pressed, the pre-pressure airbag 4 and the elastic dome cover 9 are compressed, and the liquid outlet cavity 8 is aligned with the liquid outlet port 7, so that the liquid outlet channel of the pump head is connected. Subsequently, the elastic airbag 3 is compressed, and the air inside it is discharged through the liquid outlet channel. After releasing the liquid outlet nozzle 5, the pre-pressure airbag 4 and the elastic dome cover 9 are restored (compared to the elastic airbag 3, the pre-pressure airbag 4 and the elastic dome cover 9 will be restored one step earlier), the position of the liquid outlet cavity 8 and the liquid outlet port 7 is staggered, so that the liquid outlet channel of the pump head is closed. Subsequently, the elastic airbag 3 is restored to form a negative pressure, which draws the liquid in the bottle up, thereby forming a negative pressure in the bottle, and the external air opens the blocking part 28, so that the air replenishing port 25 is opened, and then replenishes the air into the bottle. After pressing again, the liquid can be discharged evenly and smoothly.

[0028] A sealed cavity is formed between the outer side of the elastic airbag 3 and the pump chamber 2 , which further increases the resilience of the elastic airbag 3 and ensures the effect of extracting liquid.

[0029] The second embodiment is different from the first embodiment in that the lower end of the elastic airbag 3 is open to the bottom surface of the pump chamber 2, that is, the interior of the elastic airbag 3 is connected to the bottle. The principle of use is: first, the liquid outlet nozzle 5 is pressed, the pre-pressure airbag 4 is compressed, the liquid outlet cavity 8 is aligned with the liquid outlet port 7, so that the liquid outlet channel of the pump head is connected. At this time, the liquid outlet nozzle 5 is continued to be pressed downward, the elastic airbag 3 is compressed, and the air in the elastic airbag 3 enters the bottle, increasing the pressure in the bottle, thereby causing the liquid in the bottle to pass through the liquid outlet channel and be evenly and smoothly sprayed out from the liquid outlet cavity 8. When the liquid outlet nozzle 5 is released, the pre-pressure airbag 4 and the elastic dome cover 9 are immediately restored, the position of the liquid outlet cavity 8 is staggered with the liquid outlet port 7, so that the liquid outlet channel of the pump head is closed, and then the elastic airbag 3 is restored, thereby forming a negative pressure in the bottle, and the external air opens the blocking part 28, so that the air replenishment port 25 is opened, and then replenishment is made into the bottle.

[0030] The operating principles of the third and fourth embodiments are the same as those of the first embodiment, that is, the internal air of the elastic airbag 3 is discharged through the liquid outlet channel by pressing the liquid outlet nozzle 5, and then the liquid outlet nozzle 5 is released, and the elastic airbag 3 is restored to form a negative pressure, which draws the liquid in the bottle upward, thereby forming a negative pressure in the bottle, and finally air is replenished into the bottle through the corresponding air replenishment port.

[0031] The side wall of the pre-pressurized airbag 4 is provided with a plurality of exhaust holes 10, so that the interior of the pre-pressurized airbag 4 forms a conductive structure. When the liquid outlet nozzle 5 is pressed, the air in the pre-pressurized airbag 4 is discharged from the exhaust holes 10, so as to avoid the compression of the pre-pressurized airbag 4 and the increase of internal air pressure, which makes it difficult to compress and makes it impossible for the liquid outlet cavity 8 to be aligned with the liquid outlet port 7. In addition, it is ensured that the force required to compress the pre-pressurized airbag 4 is less than the compression force of the elastic airbag 3 (because the elastic airbag 3 will squeeze out the liquid in the bottle when compressed, the force of the pre-pressurized airbag 4 to compress and squeeze out the air is smaller), so that the pre-pressurized airbag 4 is compressed first, and the elastic airbag 3 will be compressed only after the liquid outlet channel of the pump head is connected (as shown in Figures 2 and 3). In addition, the pre-pressurized airbag 4 can also be a closed structure. That is, the exhaust hole 10 is not provided, but the elastic force between the pre-compression airbag 4, the elastic dome cover 9 and the elastic airbag 3 needs to be adjusted to ensure that when the liquid outlet nozzle 5 is pressed, the pre-compression airbag 4 and the elastic dome cover 9 will be compressed before the elastic airbag 3, and when the liquid outlet nozzle 5 is released, the pre-compression airbag 4 and the elastic dome cover 9 will recover before the elastic airbag 3.

[0032] A gap structure is provided between the top of the liquid outlet pipe 6 and the top surface of the liquid outlet cavity 8 (as shown in FIG. 4 and FIG. 5 ).

[0033] The liquid outlet nozzle 5 is provided with a sleeve portion 12 communicating with the liquid outlet cavity 8 , and the sleeve portion 12 is sleeved on the outside of the liquid outlet pipe 6 .

[0034] Sealing rings 11 are provided outside the liquid outlet pipe 6 at the upper and lower ends of the liquid outlet 7 , and the sealing rings 11 are sealedly connected to the sleeve portion 12 .

[0035] A switch groove 13 is provided on the outer side of the liquid outlet nozzle 5, and a limiting protrusion 14 is provided in the bottle cap 1 corresponding to the switch groove 13. The limiting protrusion 14 is inserted into the switch groove 13. Initially, the limiting protrusion 14 is in contact with one side of the switch groove 13. At this time, the liquid outlet cavity 8 is not aligned with the liquid outlet 7. By rotating the liquid outlet nozzle 5, the limiting protrusion 14 is in contact with the other side of the switch groove 13. At this time, the liquid outlet cavity 8 is aligned with the liquid outlet 7, and the liquid can be discharged normally by pressing the liquid outlet nozzle 5.

[0036] A limiting groove 17 is provided at the inner bottom of the pump chamber 2, and a limiting plug 18 is provided at the bottom of the elastic airbag 3 corresponding to the limiting groove 17. When the elastic airbag 3 is installed, the limiting plug 18 needs to be inserted into the limiting groove 17, that is, the elastic airbag 3 is always in a state where it cannot rotate.

[0037] An internal threaded portion 19 is provided at the upper end of the bottle cap 1, and an external threaded portion 20 is provided at the lower end of the liquid outlet nozzle 5 corresponding to the internal threaded portion 19. The external threaded portion 20 is threadedly connected to the internal threaded portion 19. When in use, the liquid outlet nozzle 5 needs to be screwed to separate the external threaded portion 20 from the internal threaded portion 19 before the liquid outlet nozzle 5 can be pressed normally, thereby avoiding leakage due to accidental pressing during transportation, which affects sales (as shown in Figures 2 and 3).

[0038] A one-way valve 22 is provided in the liquid outlet channel, and a channel hole is provided at the bottom of the pump chamber 2. The one-way valve 22 includes an annular wall 15, and a plurality of liquid inlet holes 16 are provided on the annular wall 15. The liquid inlet holes 16 are connected to the channel hole, and a flexible lower convex portion 21 is provided on the inner side of the top of the annular wall 15, which protrudes toward the channel hole. The bottom of the flexible lower convex portion 21 is lower than the lowermost end of the liquid inlet hole 16. After the liquid inlet pipe of the pump head is installed, the flexible lower convex portion 21 is sealed and installed at the upper end of the liquid inlet pipe. At this time, the liquid inlet hole 16 is disconnected from the channel hole. When liquid flows upward, the liquid will push the flexible lower convex portion 21 to move upward, so that the liquid inlet hole 16 is connected to the channel hole, even if the two sides of the one-way valve 22 are connected, so that liquid can be discharged normally. When no liquid flows upward, the flexible lower convex portion 21 is pressed down and restored to re-block the liquid inlet pipe.

[0039] The outer side of the upper end of the elastic airbag 3 is provided with a sealing ring. When the liquid outlet nozzle 5 is pressed, the sealing ring is pressed downward to press the air below the sealing ring into the bottle. In the first case, the inner bottom of the elastic airbag 3 is sealed and connected to the lower end of the pump chamber 2, so that the inner side of the elastic airbag 3 forms a sealed airbag structure, thereby further increasing the rebound force of the elastic airbag 3, and the air between the elastic airbag 3 and the pump chamber 2 is pressed into the bottle for the normal function of squeezing out the liquid in the bottle; in the second case, the inner and outer sides of the lower end of the elastic airbag 3 are both connected to the interior of the bottle, and the sealing ring can simultaneously press the air on both sides of the elastic airbag 3 into the bottle, thereby increasing the liquid output in a single press; in the third case, the side wall of the elastic airbag 3 is provided with a number of through holes for connecting the inner and outer sides, so that the function of the elastic airbag 3 is the same as that of a conventional spring. This structure can reduce the pressing force.

Claims

1. A pump head for preventing accidental pressure discharge of liquid, comprising a bottle cap (1) for being arranged on a bottle body, characterized in that A pump chamber (2) is provided in the bottle cap (1), a resettable elastic airbag (3) is installed in the pump chamber (2), a resettable pre-pressure airbag (4) is provided on the top of the elastic airbag (3), and a liquid outlet nozzle (5) is installed on the pre-pressure airbag (4); a liquid outlet pipe (6) is provided on the elastic airbag (3), a liquid outlet (7) is provided at the upper end of the liquid outlet pipe (6), and a liquid outlet cavity (8) is provided on the liquid outlet nozzle (5); when the liquid outlet nozzle (5) is pressed, the pre-pressure airbag (4) is compressed, and the liquid outlet cavity (8) is aligned with the liquid outlet (7), so that the liquid outlet channel of the pump head is connected.

2. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that An elastic dome cover (9) is provided on the top of the liquid outlet pipe (6), and the top surface of the elastic dome cover (9) abuts against the top surface of the liquid outlet cavity (8).

3. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that The side wall of the pre-compression airbag (4) is provided with a plurality of exhaust holes (10).

4. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that The pre-compression airbag (4) is a closed structure.

5. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that A sleeve portion (12) communicating with the liquid outlet cavity (8) is provided in the liquid outlet nozzle (5), and the sleeve portion (12) is sleeved on the outside of the liquid outlet pipe (6).

6. The pump head for preventing accidental pressure discharge of liquid according to claim 5, characterized in that Sealing rings (11) are provided outside the liquid outlet pipe (6) at the upper and lower ends of the liquid outlet (7), and the sealing rings (11) are sealedly connected to the sleeve portion (12).

7. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that A switch slot (13) is provided on the outside of the liquid outlet nozzle (5), and a limiting protrusion (14) is provided in the bottle cap (1) corresponding to the switch slot (13), and the limiting protrusion (14) is inserted into the switch slot (13).

8. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that A limiting groove (17) is provided at the inner bottom of the pump chamber (2), and a limiting plug (18) is provided at the bottom of the elastic airbag (3) corresponding to the limiting groove (17), and the limiting plug (18) is inserted into the limiting groove (17).

9. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that A one-way valve (22) is provided in the liquid outlet channel.

10. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that The bottle cap (1) and the pump chamber (2) are separate structures. The upper end surface of the pump chamber (2) is provided with a gas replenishment port (25). When installed on the bottle, the gas replenishment port (25) is blocked by a sealing gasket (24), so that the gas replenishment port (25) forms a one-way air valve.

11. The pump head for preventing accidental pressure discharge of liquid according to claim 10, characterized in that The upper end surface of the pump chamber (2) is provided with an outer ring portion (26), the air supply port (25) is provided on the outer ring portion (26), the sealing gasket (24) is installed on the bottom surface of the outer ring portion (26), and the sealing gasket (24) includes an abutting ring (27) located on the outside and a sealing portion (28) located on the inside for sealing the air supply port (25). After installation, the upper end surface of the bottle mouth of the bottle is in contact with the abutting ring (27).

12. The pump head for preventing accidental pressure discharge of liquid according to claim 1, characterized in that A sealing ring is provided on the outer side of the upper end of the elastic airbag (3), and a plurality of through holes for communicating the inner and outer sides are provided on the side wall of the elastic airbag (3).

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