Nasal spray pump and nasal spray delivery device

Abstract

The utility model discloses a nasal spray pump and a nasal spray delivery device, the nasal spray pump comprises a pump body, a piston, a plunger rod, a ball and a spring, the lower part of the pump body is provided with a liquid inlet; the piston is arranged in the pump body in a sliding manner, and the piston is provided with a skirt edge which is in interference sealing with the pump body; the plunger rod movably penetrates through the piston, and part of the plunger rod is contained in the skirt edge. The ball is arranged at the inner bottom of the pump body and is used for selectively blocking the liquid inlet; the spring is arranged between the piston and the ball and is used for supporting the plunger rod; in the first state, the ball seals the liquid inlet, the plunger rod is separated from the skirt edge under the hydraulic effect, and a side flow channel is formed, in the second state, the ball opens the liquid inlet, and the plunger rod and the skirt edge are sealed in an interference mode under the elastic force effect. According to the nasal spray pump, interference sealing is achieved through the protruding part and the ring part, the sealing performance between the piston and the plunger rod is improved, and the liquid pumping effect of the nasal spray pump is enhanced.

Description

Technical Field

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

[0002] As a common medical device, the nasal spray delivery device fills drugs or appropriate excipients in a special device, and uses the pressure of the nasal spray pump to release the drugs in a mist form, which is mostly used for pulmonary inhalation or directly spraying to diseased parts such as the mucosal and skin of the cavity for treatment.

[0003] As the core component, the reliability of the liquid pumping function of the nasal spray pump is related to the quality of the nasal spray delivery device. In the existing nasal spray pump structure, the piston and the plunger rod are mostly in a simple abutting fit, and the sealing performance between the two is poor. When the piston moves upward, external air easily enters the inside of the pump body from the gap between the two, resulting in a decrease in the negative pressure inside the pump, affecting the pumping effect. When the piston moves downward, the liquid is released outward from the gap between the two before reaching the preset pressure, affecting the pumping out effect.

[0004] Based on the above problems, this application proposes a new type of nasal spray pump and nasal spray delivery device. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a nasal spray pump and a nasal spray delivery device, which improve the sealing performance between the piston and the plunger rod through interference fit, thereby improving the use effect of the nasal spray pump and enhancing the competitiveness of the product.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A nasal spray pump, comprising:

[0008] A pump body, with a liquid inlet arranged below the pump body;

[0009] A piston, slidably arranged in the pump body, and the piston has a skirt edge that interferes and seals with the pump body;

[0010] A plunger rod, movably penetrating through the piston and part of it is received in the skirt edge;

[0011] A ball, arranged at the inner bottom of the pump body, for selectively blocking the liquid inlet;

[0012] A spring, arranged between the piston and the ball, for supporting the plunger rod;

[0013] In the first state, the ball blocks the liquid inlet, and the plunger rod is separated from the skirt edge under the action of hydraulic pressure to form a side flow channel. In the second state, the ball opens the liquid inlet, and the plunger rod interferes and seals with the skirt edge under the action of elastic force.

[0014] In some embodiments, a convex portion is provided on the inner side of the skirt, and a ring portion is provided on the outer periphery of the plunger rod. In the second state, the convex portion and the ring portion interfere with each other and seal.

[0015] In the above solution, the sealing between the piston and the plunger rod is improved by the interference sealing between the convex portion and the ring portion, thereby enhancing the pumping effect of the nasal spray pump.

[0016] In some embodiments, the interference amount between the protrusion and the ring portion is smaller than the interference amount between the skirt and the pump body.

[0017] In the above scheme, the interference amount is controlled. When the nasal spray pump is in the first state, the liquid / gas will first break the seal between the plunger rod and the piston, thereby pumping liquid outward to release pressure, but will not affect the seal between the piston and the pump body, ensuring the normal use of the pump function.

[0018] In some embodiments, a ball seat is provided at the inner bottom of the pump body, and the ball movable seat is provided on the ball seat.

[0019] In the above solution, the installation of the ball is facilitated by setting a ball seat, which has a conical structure to adapt to balls of different diameters within a certain range, and the inner wall of the ball seat is in contact with the ball to ensure that the sealing function is achieved at a larger tilt angle.

[0020] In some embodiments, a first step is provided in the pump body, and the first step is used to fix the lower end of the spring.

[0021] In the above solution, the first step is provided to cooperate with the plunger rod, thereby facilitating the installation and removal of the spring.

[0022] In some embodiments, a second step is provided in the pump body, and the second step is used to limit the maximum descending stroke of the piston.

[0023] In the above solution, the inner diameter of the second step is adapted to the skirt of the piston, which limits the maximum downward stroke of the piston and avoids collision between the plunger rod and the ball, ensuring that the one-way check function of the ball is not affected.

[0024] In some embodiments, an air inlet is provided on the pump body, and the air inlet is used to balance the air pressure difference between the inside and outside of the container.

[0025] In the above scheme, by providing an air inlet hole on the pump body, when the nasal spray pump is installed on the container, the gas inside and outside the container can be connected through the air inlet hole, thereby achieving internal and external air pressure balance and ensuring the smoothness of the pumping liquid.

[0026] In some embodiments, a plurality of guide grooves are circumferentially spaced apart on the plunger rod.

[0027] In the above solution, by providing a diversion groove, the liquid in the pump body can be discharged outwards. In addition, the external diversion groove is more convenient to process, and the multi-diversion groove surrounding layout can meet the large liquid pumping requirement of the pump, and it is not easy to affect the structural strength of the plunger rod.

[0028] In some embodiments, a pressing tube is provided above the piston. The pressing tube is sleeved on the top of the plunger rod and is in communication with the diversion groove.

[0029] In the above solution, by providing a pressing tube, it is convenient for the user to operate the nasal spray pump, and the pumped liquid can be released outwards through the pressing tube.

[0030] In some embodiments, a pump cover is provided between the pump body and the piston. The pump cover is used to fix the pump body and can limit the maximum upward sliding stroke of the piston.

[0031] A nasal spray delivery device includes a bottle body, a gland, and the nasal spray pump described above. One end of the nasal spray pump is arranged in the bottle body, and the other end is connected to the gland.

[0032] Compared with the prior art, the beneficial effects of the present utility model at least include:

[0033] 1. By the interference sealing between the convex part and the ring part, the sealing performance between the piston and the plunger rod is improved, and the liquid pumping effect of the nasal spray pump is enhanced.

[0034] 2. The nasal spray pump is composed of a pump body, a piston, a plunger rod, a ball and a spring, and has the advantages of simple structure and convenient installation.

[0035] 3. The plunger rod with an external diversion groove is convenient to process, and the multi-groove surrounding layout can meet the large liquid pumping requirement of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural view of the nasal spray pump of the present utility model in the first state.

[0037] Figure 2 is a schematic structural view of the nasal spray pump of the present utility model in the second state.

[0038] Figure 3 is a schematic structural view of the pump body.

[0039] Figure 4 is an exploded structural view of the piston and the plunger rod.

[0040] Figure 5 is a schematic structural view of the nasal spray delivery device of the present utility model.

[0041] In the figure: 1. Pump body; 11. Liquid inlet; 12. Ball seat; 13. First step; 14. Second step; 15. Air inlet hole; 2. Piston; 21. Skirt; 22. Protrusion; 3. Plunger rod; 31. Ring part; 32. Flow guide groove; 4. Ball; 5. Spring; 6. Side flow channel; 7. Pressing tube; 8. Pump cover; 81. Sealing gasket; 9. Bottle body; 10. Pressing cover; 101. Inner core. Detailed implementation mode

[0042] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be more complete and comprehensive, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their repeated description will be omitted.

[0043] The words expressing positions and directions described in this utility model are all illustrated with reference to the accompanying drawings, but can be changed according to needs, and all the changes made are included in the protection scope of this utility model.

[0044] See Figures 1 to 4 As shown, this utility model discloses a nasal spray pump, which includes a pump body 1, a piston 2, a plunger rod 3, a ball 4 and a spring 5.

[0045] Among them, as Figure 3 shown, the pump body 1 has a tubular structure with a larger upper part and a smaller lower part, so that each component such as the ball 4, the spring 5, and the piston 2 can be installed one by one. In addition, a liquid inlet 11 is provided below the pump body 1 for connecting a liquid suction pipe, so as to pump the liquid from the container (see Figure 5 ). In this application, the pump body 1 and the liquid inlet 11 can be integrally formed of PP material, so as to ensure the molding accuracy and quality of the injection molded parts, and make the product environmentally friendly and non-toxic, improving the use safety.

[0046] As Figure 1 , Figure 2 and Figure 4 shown, the piston 2 is a hollow cylindrical tube-shaped structure, which is slidably arranged in the pump body 1, and a radially outward-expanded skirt 21 is provided at the bottom of the piston 2, and the skirt 21 is interference-sealed with the pump body 1 to ensure the sealing of the inner cavity of the pump body 1.

[0047] The plunger rod 3 movably penetrates through the piston 2 and part of it is received in the skirt 21. The plunger column can cooperate with the piston 2 to form a seal or form a side flow channel 6 with it, so as to meet the requirements of the pumping and discharging functions.

[0048] Specifically, a convex portion 22 is provided on the inner side of the skirt 21. The convex portion 22 can be made of a rubber material with good sealing performance and is distributed in a ring shape at the top position of the skirt 21 to maintain circumferential sealing. A ring portion 31 is provided on the outer periphery of the plunger rod 3. The ring portion 31 is received in the skirt 21 and has an inclined surface that cooperates with the convex portion 22. In the initial state, the convex portion 22 and the ring portion 31 are in interference sealing, thereby ensuring the sealing performance between the plunger rod 3 and the piston 2.

[0049] Still as Figure 1 and Figure 2 shown, the ball 4 is provided on the inner bottom of the pump body 1 and can be in sealed cooperation with it. During the up and down movement of the piston 2, the ball 4 can selectively block the liquid inlet 11 to act as a one-way valve and perform one-way check on the liquid in the pump body 1.

[0050] The spring 5 is provided between the piston 2 and the ball 4, used to support the plunger rod 3 and provide elastic force for the piston 2 and the plunger rod 3 to reset.

[0051] The working principle of the nasal spray pump of the present application is as follows:

[0052] Step 1: In the first state (pressing state), the ball 4 blocks the liquid inlet 11 to prevent the liquid / gas in the pump body 1 from flowing back. As the piston 2 drives the plunger rod 3 to gradually move downward and compress the spring 5, at the same time, the inner cavity space of the pump body 1 becomes smaller, resulting in an increase in the internal liquid / gas pressure. When the liquid / gas pressure reaches a certain level, the seal between the convex portion 22 of the skirt 21 and the ring portion 31 of the plunger rod 3 is broken, and the plunger rod 3 further moves downward and separates from the skirt 21 of the piston 2 to form a side flow channel 6, and the liquid / gas is pumped out through this side flow channel 6.

[0053] Step 2: In the second state (non-pressing state), under the action of the elastic force of the spring 5, the ring portion 31 of the plunger rod 3 closely adheres to the protrusion of the skirt 21 to form interference sealing. At the same time, the spring 5 urges the piston 2 to move upward, resulting in a larger inner cavity space of the pump body 1 to form a negative pressure. The ball 4 is driven to open the liquid inlet 11 passively, and the liquid / gas in the container is pumped into the pump body 1 under the action of the negative pressure.

[0054] Step 3: Repeat steps 1 to 2 to achieve the continuous liquid pumping output function of the nasal spray pump.

[0055] In some embodiments, the interference amount between the convex portion 22 and the ring portion 31 is less than the interference amount between the skirt 21 and the pump body 1. By controlling the interference amount, when the nasal spray pump is in the first state, the liquid / gas will first break the seal between the plunger rod 3 and the piston 2, thereby pumping out liquid to release pressure, but it does not affect the seal between the piston 2 and the pump body 1, ensuring the normal use of the pump function.

[0056] See Figure 3As shown, in some embodiments, a bead seat 12 is provided on the inner bottom of the pump body 1. The bead seat 12 has a conical structure to adapt to ball bearings 4 with different diameters within a certain range. The ball bearings 4 are movably seated on the bead seat 12 and are in contact with the inner wall of the bead seat 12 all around, ensuring the sealing function can be achieved at a relatively large inclination angle.

[0057] In some embodiments, a first step 13 is provided inside the pump body 1. The first step 13 is used to fix the lower end of the spring 5, and the upper end of the spring 5 is sleeved on the bottom of the plunger rod 3 and abuts against the ring portion 31, thereby facilitating the installation and disassembly of the spring 5.

[0058] In some embodiments, a second step 14 is provided inside the pump body 1. The second step 14 is located above the first step 13, and its inner diameter is adapted to the skirt 21 of the piston 2. The second step 14 is used to limit the maximum downward sliding stroke of the piston 2, preventing the plunger rod 3 from colliding with the ball bearings 4 and affecting the one-way check function of the ball bearings 4.

[0059] In some embodiments, an air inlet hole 15 is provided on the pump body 1. By providing the air inlet hole 15 on the pump body 1, when the nasal spray pump is installed on the container, the gas inside and outside the container can be connected through the air inlet hole 15, thereby achieving the balance of the internal and external air pressures and ensuring the smoothness of the pumping liquid.

[0060] As Figure 4 shown, in some embodiments, a plurality of diversion grooves 32 are circumferentially and spacedly provided on the plunger rod 3 to outwardly discharge the liquid inside the pump body 1, realizing the liquid pumping function. In addition, the external diversion grooves 32 are more convenient to process. The multi-diversion groove 32 surrounding layout can meet the large liquid pumping volume requirement and is not likely to affect the structural strength of the plunger rod 3.

[0061] See Figure 1 and Figure 2 shown, in some embodiments, a pressing tube 7 is provided above the piston 2. The pressing tube 7 is sleeved on the top of the plunger rod 3 and is in communication with the diversion grooves 32. By operating the pressing tube 7, the nasal spray pump can be actuated, and the pumped liquid can be released outward through the pressing tube 7.

[0062] In some embodiments, a pump cover 8 is provided between the pump body 1 and the piston 2. The pump cover 8 is used to fix the pump body 1. For example, the pump body 1 can be installed at the container opening through the pump cover 8 to fix the nasal spray pump. In addition, the pump cover 8 can also limit the maximum upward sliding stroke of the piston 2, that is, the bottom of the pump cover 8 can press the skirt 21 of the piston 2 against the inside of the pump body 1 to prevent the piston 2 from falling off and affecting the normal use of the pump function.

[0063] See Figure 5As shown, a nasal spray delivery device, such as a handheld nasal sprayer, includes a bottle body 9, a gland 10, and the above-mentioned nasal spray pump. One end of the nasal spray pump is disposed inside the bottle body 9, and the other end is connected to the gland 10.

[0064] Specifically, the nasal spray pump can be connected to the bottle body 9 through a pump cover 6. For example, the pump cover 6 is pressed against the bottle mouth, and a connecting member that can be fixed to or threadedly connected to the edge of the bottle mouth is sleeved on the pump cover 6 to achieve the installation of the nasal spray pump. The gland 10 is located above the bottle body 9, and an inner core 101 capable of atomizing the liquid is included in the gland 10. The gland 10 is connected to the piston 2 through a pressing tube 7, and the inner core 101 communicates with the side flow channel 6 of the nasal spray pump.

[0065] During use, the patient presses the gland 10, which causes the piston 2 to move downward through the pressing tube 7, enabling the nasal spray pump to pump liquid. The liquid in the pump body 1 enters the inner core 101 through the side flow channel 6 and the pressing tube 7 and is atomized and released outward under high pressure. After releasing the pressing, the piston 2 and the gland 10 are reset under the action of the spring 5, and the liquid in the bottle body 9 is pumped into the pump body 1, and this process repeats cyclically.

[0066] It should be noted that in the second state, the skirt 21 of the piston 2 will interfere with and seal the pump cover 6 (see Figure 2 ). At this time, the air inlet hole 15 on the pump body 1 is jointly blocked by the skirt 21 and the pump cover 6, and the inside and outside of the bottle body 9 are in a sealed state. When the piston 2 moves downward and switches to the first state, the skirt 21 of the piston 2 will separate from the pump cover 6 (see Figure 1 ). The gas in the bottle body 9 can enter the upper part of the skirt 21 through the air inlet hole 15 and communicate with the outside through the gap between the pump cover 6 and the pressing tube 7, thus achieving the balance of the air pressure inside and outside the bottle body 9.

[0067] In some embodiments, a sealing gasket 81 is provided between the pump cover 6 and the bottle body 9 to prevent leakage at the connection from affecting the use of the device and to provide the reliability of the installation of the nasal spray pump.

[0068] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principles and purposes of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A nasal spray pump, characterized in that, Comprising: A pump body (1) with a liquid inlet (11) provided below the pump body (1); A piston (2) slidably disposed within the pump body (1), the piston (2) having a skirt (21) that interferentially seals with the pump body (1); A plunger rod (3) movably passing through the piston (2) and partially received within the skirt (21); A ball (4) disposed on the inner bottom of the pump body (1) for selectively blocking the liquid inlet (11); A spring (5) disposed between the piston (2) and the ball (4) for supporting the plunger rod (3); In a first state, the ball (4) blocks the liquid inlet (11), and the plunger rod (3) separates from the skirt (21) under hydraulic pressure to form a side flow channel (6). In a second state, the ball (4) opens the liquid inlet (11), and the plunger rod (3) interferentially seals with the skirt (21) under elastic force.

2. The nasal spray pump according to claim 1, characterized in that, A convex portion (22) is provided on the inner side of the skirt (21), and a ring portion (31) is provided on the outer periphery of the plunger rod (3). In the second state, the convex portion (22) interferentially seals with the ring portion (31).

3. The nasal spray pump according to claim 2, characterized in that, The interference amount between the convex portion (22) and the ring portion (31) is less than the interference amount between the skirt (21) and the pump body (1).

4. The nasal spray pump according to claim 1, characterized in that, A ball seat (12) is provided on the inner bottom of the pump body (1), and the ball (4) is movably seated on the ball seat (12).

5. The nasal spray pump according to claim 1, wherein, A first step (13) is provided within the pump body (1) for fixing the lower end of the spring (5).

6. The nasal spray pump according to claim 1, characterized in that, A second step (14) is provided within the pump body (1) for limiting the maximum downward sliding stroke of the piston (2).

7. The nasal spray pump according to claim 1, characterized in that, An air inlet hole (15) is provided on the pump body (1) for balancing the air pressure difference inside and outside the container.

8. The nasal spray pump according to claim 1, characterized in that, A plurality of flow guiding grooves (32) are circumferentially spaced on the plunger rod (3).

9. The nasal spray pump according to claim 1, characterized in that, A pump cover (8) is provided between the pump body (1) and the piston (2), and the pump cover (8) is used to fix the pump body (1) and can limit the maximum upward sliding stroke of the piston (2).

10. A nasal spray delivery device, characterized in that, Including a bottle body, a gland, and a nasal spray pump as described in any one of claims 1-9; Wherein, one end of the nasal spray pump is disposed within the bottle body, and the other end is connected to the gland.

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