A pump head and metered dose nasal spray device with the pump head

Abstract

This utility model discloses a pump head and a metering nasal spray device with the pump head, including a connecting cap for connection to a bottle body, and a pump assembly for metering liquid dispensing connected inside the connecting cap. The pump assembly includes a pump chamber, an upper pump rod disposed within the pump chamber, an inlet channel within the upper pump rod, an inlet on the outer wall of the upper pump rod communicating with the inlet channel, a limiting part on the outer wall of the upper pump rod, a piston movably sleeved on the upper pump rod, an upper pressure spring between the piston and the limiting part, a lower pump rod disposed below the piston, and a one-way valve mechanism at the inlet end of the pump chamber. The one-way valve mechanism includes a fixed seat and a pump ball disposed in the fixed seat, and a receiving groove on the fixed seat for accommodating the end of the upper pump rod. This utility model has a simple structure. By restricting the movement of the pump ball in a limited space through the fixed seat, the fixed seat can guide the upper pump rod to maintain axial movement, avoiding lateral swing, allowing the pump ball and pump chamber to seal and open quickly, resulting in a more stable and precise pumping volume.

Description

Technical Field

[0001] This utility model relates to the technical field of nasal sprays, and in particular to a pump head and a metering nasal spray device with the pump head. Background Technology

[0002] In recent years, with rising air pollution levels and increased allergen exposure, the incidence of nasal diseases such as chronic rhinitis and sinusitis has shown a significant upward trend. Nasal topical medication, due to its advantages of bypassing gastrointestinal degradation and the first-pass effect of the liver, has become a core method for treating nasal diseases.

[0003] Current mainstream nasal spray devices primarily utilize a pump assembly in conjunction with a one-way valve to deliver medication. This is achieved by creating a pressure gradient through the axial relative displacement of the pump rod and piston, and using the one-way valve to precisely meter and atomize the medication. However, in practical use, it has been found that the pumping efficiency of these devices is significantly affected by the pump assembly. If the user does not press the nasal spray device precisely axially, the pump rod will generate a radial force, causing lateral oscillation, which affects the pumping efficiency and the amount of medication dispensed, resulting in a deviation from the actual dosage and thus impacting the therapeutic effect.

[0004] This utility model was made based on this situation. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quantitative nasal spray device that has the characteristics of simple structure and can make the pump output more stable and accurate.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0007] A pump head includes a connecting cap for connection with a bottle body, characterized in that: a pump assembly capable of metering liquid spraying is connected inside the connecting cap, the pump assembly includes a pump chamber, an upper pump rod is provided in the pump chamber, the upper pump rod has a liquid inlet channel, the outer wall of the upper pump rod has a liquid inlet communicating with the liquid inlet channel, a limiting part is provided on the outer wall of the upper pump rod, a piston is movably sleeved on the upper pump rod, an upper pressure spring is provided between the piston and the limiting part, a lower pump rod is provided below the piston, a one-way valve mechanism is provided at the liquid inlet end of the pump chamber, the one-way valve mechanism includes a fixed seat and a pump ball provided in the fixed seat, the fixed seat is provided with a receiving groove capable of accommodating the end of the upper pump rod, and a lower pressure spring is provided between the lower end of the lower pump rod and the upper end of the fixed seat.

[0008] Preferably, the receiving groove is provided with a plurality of limiting blocks on the groove wall.

[0009] Preferably, the container tank has an outlet on its wall for liquid to pass through.

[0010] Preferably, the piston includes an inner plug body, and an outer plug body is connected to the inner plug body via a connecting ring. The outer plug body dynamically seals with the inner wall of the pump chamber, and the inner plug body dynamically seals with the outer wall of the upper pump rod. The lower end of the inner plug body cooperates with the upper end of the lower pump rod to form a seal.

[0011] Preferably, an air vent is provided on the wall of the pump chamber.

[0012] Preferably, a first seal is provided between the connecting cover and the pump assembly.

[0013] Preferably, the pump assembly is further provided with a liquid inlet pipe located below the one-way valve mechanism.

[0014] Preferably, the pump assembly can change the liquid dosage ejected from the outlet end by replacing the lower pump rod with one of different sizes.

[0015] A metered nasal spray device, comprising:

[0016] A liquid storage bottle, which has a bottle opening;

[0017] The pump head is sealed to the bottle opening via a cap, and a press head that drives the pump assembly is connected to the liquid outlet end of the pump assembly. The press head is equipped with a nozzle that can be inserted into the nasal cavity.

[0018] Preferably, a second sealing element is also provided between the connecting cap and the liquid storage bottle.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model uses a pump ball as a one-way valve, which has a simple structure and adds a fixed seat. The fixed seat restricts the movement of the pump ball in a limited space. The fixed seat is provided with a receiving groove that can accommodate the end of the upper pump rod, which can guide the upper pump rod to maintain axial movement and avoid left and right swinging. This allows the pump ball and the pump chamber to be sealed and opened quickly, making the pump output more stable and more accurate.

[0021] 2. This utility model adopts a double spring design, which enables the pump to start quickly and the pump output to be stable. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the present invention in its initial state;

[0023] Figure 2 yes Figure 1 Cross-sectional view along the AA direction;

[0024] Figure 3 This is a cross-sectional view of the present invention in use;

[0025] Figure 4 yes Figure 3 Cross-sectional view along the BB direction;

[0026] Figure 5 yes Figure 4 Enlarged view of section C;

[0027] Figure 6 This is an exploded view of the present invention;

[0028] Figure 7 This is a schematic diagram of the fixing base in this utility model. Detailed Implementation

[0029] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0030] like Figures 1 to 5 As shown, this utility model proposes a pump head, including a connecting cap 1 for connecting with a bottle body, and a pump assembly 2 for metered liquid spraying connected inside the connecting cap 1. The pump assembly 2 includes a pump chamber 21, an upper pump rod 22 is provided in the pump chamber 21, an inlet channel 221 is provided in the upper pump rod 22, an inlet port 222 communicating with the inlet channel 221 is opened on the outer wall of the upper pump rod 22, a limiting part 223 is provided on the outer wall of the upper pump rod 22, a piston 23 is movably sleeved on the upper pump rod 22, an upper pressure spring 24 is provided between the piston 23 and the limiting part 223, a lower pump rod 25 is provided below the piston 23, a one-way valve mechanism is provided at the liquid inlet end of the pump chamber 21, the one-way valve mechanism includes a fixed seat 26 and a pump ball 27 provided in the fixed seat 26, a receiving groove 261 that can accommodate the end of the upper pump rod 22 is provided on the fixed seat 26, and a lower pressure spring 28 is provided between the lower end of the lower pump rod 25 and the upper end of the fixed seat 26. This invention uses a pump ball 27 as a one-way valve, which has a simple structure. The fixed seat 26 restricts the movement of the pump ball 27 in a limited space, preventing the pump ball 27 from detaching from the pump chamber 21 when the liquid is pressed due to its light weight. The receiving groove 261 guides the upper pump rod 22 to maintain axial movement, avoiding lateral swing, so that the pump ball 27 can quickly seal and open with the pump chamber 21, making the pump output more stable and accurate. The double-spring design of the upper pressure spring 24 and the lower pressure spring 28 ensures fast pump start-up and stable pump output.

[0031] like Figure 7 As shown, multiple limiting blocks 262 are provided on the wall of the receiving groove 261 to restrict the downward axial movement of the upper pump rod 22 and to disperse the radial component force generated by the upper pump rod 22.

[0032] like Figure 2 , Figure 4 and Figure 5 As shown, the tank wall of the receiving tank 261 is provided with a liquid outlet 263 for liquid to pass through.

[0033] like Figure 5 As shown, the piston 23 includes an inner plug body 231, and an outer plug body 233 is connected to the inner plug body 231 via a connecting ring 232. The outer plug body 233 dynamically seals with the inner wall of the pump chamber 21, and the inner plug body 231 dynamically seals with the outer wall of the upper pump rod 22. The inner plug body 231 can cover the liquid inlet 222 to form a seal, and the lower end of the inner plug body 231 cooperates with the upper end of the lower pump rod 25 to form a seal.

[0034] like Figure 1 , Figure 3 and Figure 6 As shown, an air exchange port 211 is provided on the wall of the pump chamber 21.

[0035] like Figures 1 to 4 As shown, a first sealing element 5 is provided between the connecting cover 1 and the pump assembly 2 to maintain a tight connection between the connecting cover 1 and the pump assembly 2. In this embodiment, the first sealing element 5 is a sealing gasket, which is sleeved around the upper pump rod 22.

[0036] like Figures 1 to 5 As shown, the pump assembly 2 is located below the one-way valve mechanism and is also equipped with a liquid inlet pipe 29.

[0037] like Figures 1 to 5 As shown, this utility model proposes a metered nasal spray device using the above-mentioned pump head, including a storage bottle 3, the storage bottle 3 having a bottle mouth 31; the pump head is sealed and installed on the bottle mouth 31 by a connecting cap 1, and a pressing head 4 that can drive the pump assembly 2 to work is connected to the liquid outlet end of the pump assembly 2, the pressing head 4 being provided with a nozzle 41 that can extend into the nasal cavity.

[0038] like Figures 1 to 4 As shown, a second sealing element 6 is also provided between the cap 1 and the storage bottle 3, which can improve the overall sealing performance. When the cap 1 is connected to the liquid container, the second sealing element 6 is pressed tightly against the bottle opening 31 of the storage bottle 3 to seal it. In this embodiment, the second sealing element 6 is a sealing gasket, which is fitted onto the outer wall of the pump chamber 21.

[0039] like Figures 1 to 4 As shown, since the stroke of piston 23 is limited by the lower pump rod 25, the compression of the lower pressure spring 28 and the upper pressure spring 24 is constant each time the metered nasal spray device is pressed from the initial state until it can no longer be pressed down. Therefore, the liquid dose sprayed from the nozzle 41 is metered. The pump assembly 2 can change the liquid dose sprayed from the outlet end of the pump assembly 2 by replacing the lower pump rod 25 of different sizes.

[0040] The working principle of this utility model:

[0041] When the press head 4 is pressed, the lower pressure spring 28 is compressed, the press head 4 moves down, and the piston 23 moves down with the upper pump rod 22. The gas in the pump chamber 21 is compressed. When the lower pump rod 25 presses against the fixed seat 26, the piston 23 does not move, and the upper pump rod 22 continues to move down into the receiving groove 261 of the fixed seat 26. The liquid inlet 222 of the upper pump rod 22 is exposed. At this time, the upper pressure spring 24 is compressed. At this time, the inner plug 231 of the piston 23 no longer covers the liquid inlet 222 of the upper pump rod 22, and the gas in the pump chamber 21 will be discharged from this position. When the upper pump rod 22 moves down to be pressed against the limiting block 262 of the groove wall of the receiving groove 261, the upper pump rod 22 stops moving down.

[0042] When the pressing head 4 is released, due to the action of the lower pressing spring 28 and the upper pressing spring 24, the piston 23, the upper pump rod 22 and the lower pump rod 25 rebound together. The inner plug 231 of the piston 23 covers the liquid inlet 222 of the upper pump rod 22 to form a seal, and a partial vacuum is formed in the inner cavity of the pump chamber 21. Under the action of external atmospheric pressure, the liquid is introduced from the liquid inlet pipe 29 and pushes open the pump ball 27 to enter the pump chamber 21. If the pressing continues, due to the incompressibility of the liquid, the liquid is ejected from the nozzle 41 through the liquid inlet 222 via the upper pump rod 22.

[0043] The above are merely preferred embodiments of this utility model. Any technical solution that achieves the purpose of this utility model by essentially the same means shall fall within the protection scope of this utility model.

Claims

1. A pump head comprising a coupling cap (1) for connection to a bottle, characterized in that: A pump assembly (2) capable of metered liquid spraying is connected inside the connecting cover (1). The pump assembly (2) includes a pump chamber (21), an upper pump rod (22) is provided inside the pump chamber (21), an inlet channel (221) is provided inside the upper pump rod (22), an inlet port (222) communicating with the inlet channel (221) is opened on the outer wall of the upper pump rod (22), a limiting part (223) is provided on the outer wall of the upper pump rod (22), and a piston (23) is movably sleeved on the upper pump rod (22). An upper pressure spring (24) is provided between the limiting part (223) and the piston (23). A lower pump rod (25) is provided below the piston (23). A one-way valve mechanism is provided at the inlet end of the pump chamber (21). The one-way valve mechanism includes a fixed seat (26) and a pump ball (27) provided in the fixed seat (26). The fixed seat (26) is provided with a receiving groove (261) that can accommodate the end of the upper pump rod (22). A lower pressure spring (28) is provided between the lower end of the lower pump rod (25) and the upper end of the fixed seat (26).

2. A pump head as claimed in claim 1, wherein The receiving groove (261) is provided with a plurality of limiting blocks (262) on its groove wall.

3. A pump head as claimed in claim 1, wherein The container (261) has an outlet (263) on its wall for liquid to pass through.

4. The pump head of claim 1, wherein The piston (23) includes an inner plug body (231), and an outer plug body (233) is connected to the inner plug body (231) via a connecting ring (232). The outer plug body (233) dynamically seals with the inner wall of the pump chamber (21), and the inner plug body (231) dynamically seals with the outer wall of the upper pump rod (22). The lower end of the inner plug body (231) cooperates with the upper end of the lower pump rod (25) to form a seal.

5. The pump head of claim 1, wherein An air vent (211) is provided on the wall of the pump chamber (21).

6. The pump head of claim 1, wherein A first seal (5) is provided between the connecting cover (1) and the pump assembly (2).

7. The pump head of claim 1, wherein The pump assembly (2) is located below the one-way valve mechanism and is also provided with a liquid inlet pipe (29).

8. The pump head of claim 1, wherein The pump assembly (2) can change the liquid dosage sprayed from the outlet end by replacing the lower pump rod (25) of different sizes.

9. A metered dose nasal spray device characterized by, include: A liquid storage bottle (3) has a bottle mouth (31); The pump head as described in any one of claims 1 to 8 is sealed to the bottle mouth (31) by means of a connecting cap (1), and a pressing head (4) that can drive the pump assembly (2) to work is connected to the liquid outlet end of the pump assembly (2), and the pressing head (4) is provided with a nozzle (41) that can extend into the nasal cavity.

10. A metered dose nasal spray device according to claim 9, wherein, A second sealing element (6) is also provided between the connecting cap (1) and the liquid storage bottle (3).

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