Nasal spray pump and nasal spray device

Abstract

The nasal spray pump comprises a pump body, a piston, a valve element and a spring, and a ring part extending upwards is arranged at the inner bottom of the pump body; the piston is slidably arranged in the pump body, and the top of the piston is provided with a pressing rod part extending upwards. The top of the valve element abuts against the piston in a matched mode, and a barrel extending downwards is arranged at the bottom of the valve element. The elastic part is arranged below the valve core and is used for supporting the valve core; in the initial state, the valve element blocks the pressing rod part of the piston, and the cylinder part of the valve element and the ring part of the pump body are vertically opposite in a spaced mode. In the pressing state, the cylinder part of the valve element is connected with the ring part of the pump body in a sealed mode, and meanwhile the valve element, the pump body and the piston jointly form a lateral flow channel. According to the nasal spray pump, a novel non-return design is adopted, the liquid pumping function can be achieved in any posture, the use reliability is improved, the overall structure is simplified, and assembly and production are convenient.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a nasal spray pump and a nasal spray device. Background Art

[0002] As a common medical device, nasal spray is a device that fills raw drugs or suitable excipients into a special device. When used, the pressure of a manual pump is used to release the drug in the form of mist. It is mostly used for inhalation into the lungs or directly sprayed onto diseased areas such as the cavity mucosa and skin.

[0003] As the core component of a nasal sprayer, the reliability of its pumping function is crucial to the quality of the device. Currently, most manual pumps still use a ball bearing as a one-way valve to prevent the return of fluid drawn into the pump body. These ball bearings only effectively prevent the return of fluid when the pump is in a vertical or near-vertical position. If the pump is tilted or lying flat, the ball bearings may become dislodged or misaligned, causing the one-way check valve to fail and compromising pumping functionality, resulting in certain limitations. Utility Model Content

[0004] The purpose of the utility model is to provide a nasal spray pump and a nasal spray device, which eliminate the ball bearing and redesign the internal structure of the pump so that the pump can achieve the liquid pumping function at various angles.

[0005] The purpose of this utility model is achieved by the following technical solutions:

[0006] A nasal spray pump comprising:

[0007] A pump body, wherein the inner bottom of the pump body is provided with a ring portion extending upward;

[0008] A piston is slidably disposed in the pump body and has a pressure rod portion extending upwardly disposed on the top of the piston;

[0009] A valve core, the top of which is in abutment with the piston and the bottom of which is provided with a downwardly extending cylindrical portion;

[0010] A spring, the elastic spring being arranged below the valve core and used for supporting the valve core;

[0011] In the initial state, the valve core blocks the pressure rod portion of the piston, and the cylindrical portion of the valve core and the ring portion of the pump body are spaced apart from each other in the upper and lower directions;

[0012] In a pressed state, the cylindrical portion of the valve core is sealed and engaged with the annular portion of the pump body, and the valve core, the pump body and the piston together form a lateral flow channel.

[0013] The pump utilizes a novel check valve design, enabling it to pump fluid in any position, improving reliability. Furthermore, the pump consists of only four parts: a pump body, a piston, a valve core, and a spring, simplifying its overall structure and facilitating assembly and production.

[0014] In some embodiments, the pump body and the ring portion are integrally formed, the piston and the pressure rod portion are integrally formed, and the valve core and the barrel portion are integrally formed.

[0015] In the above solution, one-piece molding facilitates the production of each component.

[0016] In some embodiments, a central flow channel is provided in the pressure rod portion, the central flow channel is connected to the lateral flow channel, and the central flow channel is axially provided with a plurality of expansion cavities with different diameters.

[0017] In the above solution, the expansion cavity is used to prevent shrinkage of the pressure rod portion due to excessive thickness during injection molding, thereby ensuring the stability of the center runner molding.

[0018] In some embodiments, a first protrusion is provided on the top of the valve core, and in an initial state, the first protrusion interferes and seals with the pressure rod portion.

[0019] In some embodiments, a plurality of guide grooves are arranged at intervals on the outer periphery of the valve core.

[0020] In the above solution, the guide groove can avoid the problem of liquid blockage caused by the tolerance problem of the valve core or pump body during assembly, so that the liquid can flow smoothly from the second pump body to the pressure rod part, ensuring the reliability of the pump liquid.

[0021] In some embodiments, a sealing rib is provided on the inner side of the cylinder portion, and in a pressed state, the sealing rib interferes with the ring portion to seal.

[0022] In the above solution, the sealing rib further improves the sealing performance of the joint between the cylinder portion and the ring portion, thereby achieving a better non-return effect.

[0023] In some embodiments, a second protrusion is provided at the bottom of the valve core, and a tube portion extending upward is also provided at the inner bottom of the pump body. One end of the spring is sleeved on the second protrusion, and the other end is sleeved on the tube portion.

[0024] In the above solution, the second protrusion and the tube portion can be used to position the spring, making it easier to install the spring.

[0025] In some embodiments, in a pressed state, the second protrusion and the tube portion interfere with each other and seal.

[0026] In the above solution, the second protrusion can be inserted into the tube portion and seal it, forming a secondary seal on the basis of the sealing between the cylinder portion and the ring portion, thereby enhancing the sealing performance of the non-return design.

[0027] In some embodiments, the height of the ring portion is 1 / 4 to 1 / 3 of the height of the pump body.

[0028] In the above solution, when the height of the ring portion is within this range, the suction and delivery effects of the nasal spray pump are relatively good.

[0029] In some embodiments, the nasal spray pump further comprises a pump cover, which is disposed on the top of the pump body and forms a ventilation flow channel with the pump body and the pressure rod.

[0030] In the above solution, the pump body can be fixed to the opening of the container via the pump cover, thereby fixing the position of the nasal spray pump. When the nasal spray pump is installed on the container, the pressure difference between the inside and outside of the container is balanced through the ventilation channel, thereby ensuring the smooth pumping function.

[0031] In some embodiments, a ventilation groove is provided on the top of the pump body.

[0032] In the above solution, the ventilation groove is used to prevent the ventilation flow channel from being blocked due to tolerance during assembly of the pump cover, thereby improving the reliability of air intake.

[0033] A nasal spray device, comprising a bottle body, a gland and the above-mentioned nasal spray pump;

[0034] One end of the nasal spray pump is arranged in the bottle body, and the other end is connected to the pressure cover, and a sealing gasket is provided between the nasal spray pump and the bottle body.

[0035] Compared with the prior art, the beneficial effects of the present invention include at least:

[0036] 1. A new check design is adopted, which enables the nasal spray pump to achieve the pumping function in any posture, thereby improving the reliability of use.

[0037] 2. The overall structure of the nasal spray pump is relatively simple, which is convenient for assembly and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of the nasal spray pump of the present invention in an initial state.

[0039] Figure 2 It is a structural schematic diagram of the nasal spray pump of the present invention in a pressed state.

[0040] Figure 3 It is a structural schematic diagram of the nasal spray device of the present invention.

[0041] Figure 4It is an exploded schematic diagram of the nasal spray device of the present invention.

[0042] In the figure: 1. Pump body; 11. Ring; 12. Tube; 13. First pump chamber; 14. Second pump chamber; 15. Suction port; 16. Assembly port; 17. Vent groove; 2. Piston; 21. Pressure rod; 211. Central flow channel; 212. Expansion chamber; 3. Valve core; 31. Cylinder; 32. First convex portion; 33. Guide groove; 34. Sealing rib; 35. Second convex portion; 4. Spring; 5. Lateral flow channel; 6. Pump cover; 7. Vent channel; 8. Bottle body; 9. Pressure cap; 10. Sealing gasket. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make this disclosure more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0044] The words expressing positions and directions described in this utility model are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of this utility model.

[0045] See also Figure 1 and Figure 2 As shown, the utility model discloses a nasal spray pump, which includes a pump body 1, a piston 2, a valve core 3 and a spring 4.

[0046] The pump body 1 is generally cylindrical in structure, with a liquid suction port 15 at the bottom for pumping liquid in the container, and an open assembly port 16 at the top for facilitating the assembly of the spring 4, valve core 3 and piston 2 one by one.

[0047] In addition, the inner bottom of the pump body 1 is provided with an upwardly extending ring portion 11, which separates the inner cavity of the pump body 1 into a first pump cavity 13 and a second pump cavity 14, which are respectively used to store the liquid sucked into the pump body 1 by the pump.

[0048] The piston 2 is slidably arranged in the pump body 1, and an upwardly extending pressure rod portion 21 is provided on the top thereof. By operating the pressure rod portion 21 and cooperating with the spring 4, the piston 2 can be controlled to slide up and down in the pump body 1, thereby providing power for pumping or sucking liquid.

[0049] Note that the piston 2 must always maintain a good seal with the pump body 1 during the sliding process. In this application, the cross-section of the piston 2 is preferably a ")("-shaped structure, which enables the upper and lower ends of the piston 2 to form a seal with the inner wall of the pump body 1, thereby improving the sealing performance of the piston 2.

[0050] The valve core 3 is located below the piston 2, and its top is in abutment with the piston 2. Specifically, a first protrusion 32 is provided on the top of the valve core 3. In the initial state, the first protrusion 32 is inserted into the pressure rod portion 21 and interferes with the pressure rod portion 21 to seal, thereby preventing liquid from leaking from the pressure rod portion 21.

[0051] Furthermore, a downwardly extending cylindrical portion 31 is provided at the bottom of the valve core 3. This cylindrical portion 31 mates with the ring portion 11 and, when pressed, isolates and seals the first pump chamber 13, preventing liquid backflow. This non-return function is not affected by the position of the pump body 1. Simultaneously, this creates a complete lateral flow channel 5 in the second pump chamber 14, providing a path for liquid pumping.

[0052] The elastic member is provided below the valve core 3 to support the valve core 3 and provide elastic force for the valve core 3 to return to its original position after the pressing fails.

[0053] like Figures 1 to 2 As shown, the working principle of the above-mentioned nasal spray pump is as follows:

[0054] Step 1: In the initial state, that is, without external force, the valve core 3, supported by the spring 4, blocks the pressure rod portion 21 of the piston 2 through the first protrusion 32, and the cylindrical portion 31 of the valve core 3 and the ring portion 11 of the pump body 1 are spaced apart from each other in the upper and lower directions. At this time, the piston 2 is located at the inner top position of the valve body;

[0055] Step 2: In the pressed state, the pressure rod 21 transmits the pressure to the piston 2, which drives the valve core 3 to move downward and compresses the spring 4. As the cylindrical portion 31 of the valve core 3 is sealed with the ring portion 11 of the pump body 1, the valve core 3, the pump body 1 and the piston 2 form a lateral flow channel 5. At the same time, as the space in the second pump chamber 14 is continuously compressed, the liquid is pressurized and flows upward. The valve core 3 is forced to move slightly downward under the action of the hydraulic pressure to form a gap. The liquid enters the pressure rod 21 through the gap and is pumped out.

[0056] Step 3: Release the pressure. The valve core 3 and the piston 2 return to their initial state under the action of the spring 4. During this process, the barrel 31 separates from the ring 11. At the same time, the piston 2 moves upward, causing negative pressure to form in the inner cavity of the pump body 1. The liquid in the container is sucked into the first pump chamber 13 and overflows into the second pump chamber 14 for storage after it is full.

[0057] Step 4: Repeat steps 2 to 3 to achieve continuous pumping function.

[0058] In summary, the pump adopts a new non-return design, which enables the pump body 1 to pump liquid in any posture, improving its reliability. In addition, the pump only has four parts: the pump body 1, the piston 2, the valve core 3 and the spring 4. The overall structure is relatively simple, which is convenient for assembly and production.

[0059] In some embodiments, the pump body 1 and the ring portion 11 are integrally formed, the piston 2 and the pressure rod portion 21 are integrally formed, and the valve core 3 and the barrel portion 31 are integrally formed, thereby facilitating the manufacture of each component. For example, the pump body 1 and the pump body 1 can be integrally formed using PP material. PP is environmentally friendly and non-toxic, and has good machinability, meeting the processing requirements of various shapes and sizes. Accordingly, the piston 2 and the pressure rod portion 21, and the valve core 3 and the barrel portion 31 can also be integrally formed using PP material.

[0060] In some embodiments, a central flow channel 211 is provided in the pressure rod portion 21 . The central flow channel 211 is connected to the lateral flow channel 5 , and the pressurized liquid can be pumped outward through the central flow channel 211 .

[0061] In addition, the central flow channel 211 is provided with a plurality of expansion cavities 212 of different diameters along the axial direction, which are used to prevent shrinkage of the pressure rod portion 21 due to excessive thickness during injection molding, thereby ensuring the molding stability of the central flow channel 211 .

[0062] In some embodiments, a plurality of guide grooves 33 are provided at intervals on the periphery of the valve core 3 to avoid blockage of the liquid path due to tolerance problems of the valve core 3 or the pump body 1 during assembly, so that the liquid can flow smoothly from the second pump body 1 to the pressure rod part 21, thereby ensuring the reliability of the pump liquid.

[0063] In some embodiments, a sealing rib 34 is provided on the inner side of the barrel 31. When pressed, the sealing rib 34 interferes with the ring portion 11 to form a seal, further improving the sealing performance of the connection between the barrel 31 and the ring portion 11 and achieving a better non-return effect. For example, the sealing rib 34 has an arched cross-section and can be integrally formed at the bottom of the barrel 31. When the barrel 31 is positioned against the ring portion 11, the sealing rib 34 contacts and interferes with the ring portion 11, thereby achieving a sealing effect.

[0064] In some embodiments, a second protrusion 35 is provided at the bottom of the valve core 3, and an upwardly extending tube portion 12 is further provided at the inner bottom of the pump body 1. The second protrusion 35 and the tube portion 12 can be used to position the spring 4. Specifically, one end of the spring 4 is sleeved on the second protrusion 35, and the other end is sleeved on the tube portion 12.

[0065] Furthermore, in the pressed state, the second protrusion 35 interferes with the tube portion 12 to form a seal (not shown). Specifically, during the pressing process, as the valve core 3 moves downward, the second protrusion 35 can be inserted into the tube portion 12 and seal it, forming a secondary seal on the basis of the seal between the cylinder portion 31 and the ring portion 11, thereby enhancing the sealing performance of the check design.

[0066] In some embodiments, the height of the ring portion 11 is between 1 / 4 and 1 / 3 of the height of the pump body 1. If the ring portion 11 is less than 1 / 4 of the height of the pump body 1, the second chamber will have a smaller amount of liquid stored, and this will affect the check fit with the barrel 31. If the ring portion 11 is higher than 1 / 3 of the height of the pump body 1, the liquid in the first pump chamber 13 will have difficulty overflowing into the second chamber during pumping, resulting in a relatively limited amount of liquid pumped out each time. When the height of the ring portion 11 is within this range, the nasal spray pump achieves relatively good pumping and delivery performance.

[0067] See also Figure 3 As shown, in some embodiments, the nasal spray pump further includes a pump cover 6, which is disposed on the top of the pump body 1. The pump body 1 can be fixed to the opening of the container through the pump cover 6, thereby achieving fixation of the position of the nasal spray pump.

[0068] In addition, the pump cover 6, the pump body 1 and the pressure rod 21 together form a ventilation channel 7, see Figure 3 When the nasal spray pump is installed on the container, the pressure difference between the inside and outside of the container can be balanced through the ventilation channel 7, thereby ensuring the smoothness of the pumping function.

[0069] Furthermore, a ventilation groove 17 is provided on the top of the pump body 1. The groove is located on the outer wall of the pump body 1 and is used to prevent the ventilation channel 7 from being blocked due to tolerance when assembling the pump cover 6, thereby improving the reliability of air intake.

[0070] See also Figure 3 and Figure 4 As shown, the utility model also discloses a nasal spray device, including the above-mentioned nasal spray pump. The nasal spray device can realize the spray function at various angles, the operation is not restricted by angles, and is easy to use.

[0071] The nasal spray device includes a bottle body 8, a gland 8, and the aforementioned nasal spray pump. One end of the nasal spray pump is disposed within the bottle body 8, and the other end is connected to the gland 9. Exemplarily, the pump body 1 is connected to the bottle body 8 via a pump cap 6, wherein the pump cap 6 can be fixed to the bottle mouth by metal edging or threaded connection, and a sealing gasket 10 is provided between the pump cap 6 and the bottle body 8 for sealing. The gland 9 is connected to the pressure rod 21, and an inner core for atomizing liquid is provided within the gland 9. During use, the nasal spray pump is activated by pressing the gland 9, and the liquid in the bottle body 8 is pumped into the gland 9 by the nasal spray pump, where it is atomized by the inner core and released outward.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A nasal spray pump, characterized in that: include: A pump body (1), wherein the inner bottom of the pump body (1) is provided with a ring portion (11) extending upward; A piston (2), the piston (2) being slidably disposed in the pump body (1), and having a pressure rod portion (21) extending upwardly disposed on the top thereof; A valve core (3), the top of the valve core (3) is in abutment with the piston (2), and the bottom is provided with a downwardly extending cylindrical portion (31); a spring (4), the spring being arranged below the valve core (3) and being used to support the valve core (3); In the initial state, the valve core (3) blocks the pressure rod portion (21) of the piston (2), and the cylindrical portion (31) of the valve core (3) and the ring portion (11) of the pump body (1) are spaced apart from each other in the upper and lower directions; In the pressed state, the cylindrical portion (31) of the valve core (3) is sealed and engaged with the ring portion (11) of the pump body (1), and the valve core (3), the pump body (1) and the piston (2) together form a lateral flow channel (5).

2. The nasal spray pump according to claim 1, characterized in that A central flow channel (211) is provided in the pressure rod portion (21), the central flow channel (211) is connected to the lateral flow channel (5), and the central flow channel (211) is provided with a plurality of expansion cavities (212) of different diameters along the axial direction.

3. The nasal spray pump according to claim 1, characterized in that A first convex portion (32) is provided on the top of the valve core (3); in an initial state, the first convex portion (32) interferes with and seals the pressure rod portion (21).

4. The nasal spray pump according to claim 1, characterized in that A plurality of guide grooves (33) are arranged at intervals on the outer periphery of the valve core (3).

5. The nasal spray pump according to claim 1, characterized in that A sealing rib (34) is provided on the inner side of the cylindrical portion (31), and in a pressed state, the sealing rib (34) interferes with the ring portion (11) to form a seal.

6. The nasal spray pump according to claim 1, characterized in that The bottom of the valve core (3) is provided with a second protrusion (35), and the inner bottom of the pump body (1) is also provided with a tube portion (12) extending upward; One end of the spring (4) is sleeved on the second convex portion (35), and the other end is sleeved on the tube portion (12).

7. The nasal spray pump according to claim 6, characterized in that In a pressed state, the second protrusion interferes with the tube portion to seal.

8. The nasal spray pump according to claim 1, characterized in that It also includes a pump cover (6), which is arranged on the top of the pump body (1) and forms a ventilation channel (7) with the pump body (1) and the pressure rod portion (21).

9. The nasal spray pump according to claim 8, characterized in that A ventilation groove (17) is provided on the top of the pump body.

10. A nasal spray device, characterized in that: It comprises a bottle body (8), a gland (9) and a nasal spray pump according to any one of claims 1 to 9; One end of the nasal spray pump is arranged in the bottle body (8), and the other end is connected to the pressure cover (9), and a sealing gasket (10) is provided between the nasal spray pump and the bottle body (8).

Images