Press pump structure and nasal spray device

Abstract

The utility model discloses a pressure pump structure and a nasal spray device. The pressure pump structure comprises a pump body, a sheet type check valve, an elastic piston assembly and a first spring. The pump body is provided with a pump cavity with a top opening and a liquid inlet end communicated with the pump cavity; the sheet type check valve is arranged at the position, close to the liquid inlet end, in the pump cavity; the elastic piston assembly is arranged in the pump cavity and matched with the sheet type check valve below the elastic piston assembly to form a liquid storage space. The first spring is arranged between the sheet type check valve and the elastic piston assembly; the elastic piston assembly can move up and down in the pump body through the elastic force action of the elastic piston assembly and the first spring and control the sheet type check valve to be opened and closed, and therefore fluid is extracted or pumped. According to the pressure pump structure and the nasal spray device, the requirement for machining precision is greatly lowered through the sheet type check valve, the sealing performance is relatively better, leakage of the pressure pump structure in the using process is effectively reduced, the reset elastic performance is enhanced through the double-spring design, the pumping capacity is improved, and the spraying effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a pressing pump structure and a nasal sprayer. Background Art

[0002] At present, spray technology is widely used in the pharmaceutical industry. Using a spray device to spray various drugs on the affected areas such as the mouth / nasal cavity and the skin surface has a great effect on the absorption and curative effect of the drugs.

[0003] As a common spray medical device, the nasal sprayer has excellent effects on the treatment of the mouth / nasal cavity. The pressing pump structure of the nasal sprayer is basically a single-spring design, that is, there is only one reset spring. After long-term use, the elastic performance of the reset spring becomes weak and it is difficult to quickly reset elastically, resulting in a decrease in the delivery stroke of the medicine mist and affecting the spray effect of the nasal sprayer. In addition, the pressing pump structure mostly uses a ball check valve to check the liquid medicine, but this requires a high surface processing accuracy for the ball and the matching parts. In the actual use process, the ball check valve is prone to leakage, affecting the check effect of the liquid medicine. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pressing pump structure and a nasal sprayer, which effectively improve the elasticity and check seal effect of the pump through the double-spring and sheet check valve designs, and thereby improve the spray effect of the nasal sprayer.

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

[0006] A pressing pump structure, comprising:

[0007] A pump body, having a pump cavity with an opening at the top and a liquid inlet end communicating with the pump cavity;

[0008] A sheet check valve, arranged at a position in the pump cavity close to the liquid inlet end;

[0009] An elastic piston assembly, arranged in the pump cavity and cooperating with the sheet check valve below it to form a liquid storage space;

[0010] A first spring, arranged between the sheet check valve and the elastic piston assembly;

[0011] Wherein, through the elastic force of itself and the first spring, the elastic piston assembly can move up and down in the pump body and control the opening and closing of the sheet check valve, so as to extract or pump the fluid.

[0012] In some embodiments, the sheet check valve includes:

[0013] A valve body, arranged at the bottom of the pump cavity, a flow channel boss is arranged on the inner top of the valve body, and a through hole is arranged at the center of the flow channel boss;

[0014] A sealing piece is arranged inside the valve body and can move up and down between the liquid inlet end and the flow channel boss. The diameter of the sealing piece is larger than the aperture of the liquid inlet end.

[0015] In some embodiments, the elastic piston assembly includes:

[0016] A piston body, which is in sliding seal fit with the inner wall of the pump body;

[0017] A pressing rod is inserted into the piston body and can move up and down relative to the piston body. A diversion channel is arranged inside the pressing rod. In the initial state, the diversion channel is sealed by the piston body;

[0018] A second spring is arranged between the piston body and the pressing rod and is used to provide elastic force for the elastic piston assembly.

[0019] In some embodiments, a retaining ring covering the opening of the pump cavity is arranged above the pump body, and a ring edge for pressing against the second spring is arranged on the outer periphery of the pressing rod;

[0020] In the initial state, the retaining ring is in abutting seal with the ring edge.

[0021] In some embodiments, a balance air hole is arranged on the pump body.

[0022] In some embodiments, a lower spring seat is arranged on the flapper check valve, and an upper spring seat is arranged on the elastic piston assembly;

[0023] Both ends of the first spring are respectively connected to the upper spring seat and the lower spring seat.

[0024] A nasal sprayer includes the pump structure described in any one of the above.

[0025] In some embodiments, the nasal sprayer further includes:

[0026] A bottle body, in which the pump structure is arranged;

[0027] An upper shell is arranged above the bottle body. A core cavity channel is arranged inside the upper shell, and the elastic piston assembly of the pump structure is connected to the core cavity channel;

[0028] A core is arranged inside the core cavity channel and forms a jet flow channel with it.

[0029] In some embodiments, a vortex formation groove is arranged on the inner top of the core cavity channel.

[0030] In some embodiments, a dust-proof cover is sleeved outside the upper shell, and the dust-proof cover is in snap fit with the bottle body.

[0031] Compared with the prior art, the beneficial effects of the present utility model at least include:

[0032] 1. The wafer check valve greatly reduces the requirements for machining accuracy, and has relatively better sealing performance, effectively reducing leakage during the use of the pressure pump structure.

[0033] 2. The double-spring design enhances the reset elastic force performance and improves the pump pressure capacity, improving the spraying effect. Description of the Drawings

[0034] Figure 1 is a perspective view of the pressure pump structure of the present utility model.

[0035] Figure 2 is a cross-sectional view of the pressure pump structure of the present utility model.

[0036] Figure 3 is an exploded schematic view of the wafer check valve of the present utility model.

[0037] Figure 4 is a schematic structural view of the nasal sprayer of the present utility model.

[0038] Figure 5 is a schematic structural view of the vortex formation groove of the present utility model.

[0039] In the figures: 1. Pump body; 11. Pump cavity; 12. Liquid inlet end; 13. Balance air hole; 2. Wafer check valve; 21. Valve body; 211. Flow channel boss; 212. Through hole; 22. Sealing sheet; 3. Elastic piston assembly; 31. Piston body; 32. Pressing rod; 321. Diversion channel; 322. Ring edge; 33. Second spring; 4. First spring; 5. Retaining ring; 6. Bottle body; 7. Upper shell; 71. Core cavity channel; 711. Vortex formation groove; 8. Inner core; 9. Dust cover. Detailed Embodiments

[0040] 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 will fully convey the concept of the exemplary embodiments to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus their repeated description will be omitted.

[0041] The words expressing positions and directions described in the present utility model are all illustrated by taking the drawings as examples, but can be changed according to needs, and all changes made are included in the protection scope of the present utility model.

[0042] See Figures 1 to 3As shown in the figure, the utility model discloses a pressure pump structure, which includes a pump body 1, a wafer check valve 2, an elastic piston assembly 3 and a first spring 4.

[0043] As Figure 1 and Figure 2 shown, the pump body 1 is generally tubular. The pump body 1 has a pump cavity 11 with an open top and a liquid inlet end 12 communicating with the pump cavity 11. Among them, the pump cavity 11 is used to accommodate parts such as the wafer check valve 2 and the first spring 4, and at the same time undertakes the role of temporarily storing liquid; the liquid inlet end 12 can be integrally formed below the pump cavity 11 and is used to connect a liquid suction pipe (see Figure 4 ), which is convenient for extracting the liquid in the target container.

[0044] As Figure 2 and Figure 3 shown, the wafer check valve 2 is arranged in the pump cavity 11 near the liquid inlet end 12. The wafer check valve is a one-way valve used to realize the one-way liquid passing function.

[0045] In this application, the wafer check valve 2 includes a valve body 21 and a sealing piece 22. Among them, the valve body 21 is arranged on the inner bottom of the pump cavity 11 and remains sealed under pressure. A flow channel boss 211 is arranged on the inner top of the valve body 21 to support the sealing piece 22 to keep the flow channel unblocked, and a through hole 212 is arranged at the center of the flow channel boss 211 to realize the communication between the inside of the valve body 21 and the pump cavity 11. The sealing piece 22 is arranged inside the valve body 21 and can move up and down between the liquid inlet end 12 and the flow channel boss 211, thereby controlling the opening and closing of the wafer check valve 2. Specifically, when the sealing piece 22 is close to the liquid inlet end 12, the wafer check valve 2 is in a closed state at this time, and the fluid cannot flow from the liquid inlet end 12 to the inside of the pump cavity 11; when the sealing piece 22 is close to the flow channel boss 211, the wafer check valve 2 is in an open state at this time, and the fluid first enters the valve body 21 from the liquid inlet end 12, and then passes through the through hole 212 to the pump cavity 11.

[0046] Compared with the existing ball check valve, the wafer check valve 2 only needs to ensure that the diameter of the sealing piece 22 is larger than the aperture of the liquid inlet end 12 to cover and block the liquid hole, greatly reducing the requirement for processing accuracy and having relatively better sealing performance.

[0047] Still as Figure 2 shown, the elastic piston assembly 3 is arranged in the pump cavity 11, and the first spring 4 is arranged between the wafer check valve 2 and the elastic piston assembly 3. The first spring 4 serves as a primary reset part to provide the basic elastic force for the reset of the elastic piston assembly 3. In addition, the elastic piston assembly 3 and the wafer check valve 2 below it cooperate to form a liquid storage space for temporarily storing the fluid just extracted into the pump cavity 11.

[0048] In this application, the elastic piston assembly 3 includes a piston body 31, a pressing rod 32, and a second spring 33. Among them, the piston body 31 is slidably and sealingly fitted with the inner wall of the pump body 1, thereby forming the above-mentioned liquid storage space. The pressing rod 32 is inserted into the piston body 31 and a diversion channel 321 is provided inside the rod. The pressing rod 32 can move up and down relative to the piston body 31. In the initial state, the diversion channel 321 is sealed by the piston body 31. By controlling the movement of the pressing rod 32, the fluid in the liquid storage space can be discharged through the diversion channel 321. The second spring 33 is arranged between the piston body 31 and the pressing rod 32. The second spring 33 serves as a secondary reset member and is used to provide enhanced elastic force for the reset of the elastic piston assembly 3. Further enhancing the elastic effect improves the pumping pressure capacity of the pump.

[0049] Compared with the single-spring reset of the existing piston assembly, since the elastic piston assembly 3 is provided with the second spring 33 itself, the elasticity can be further enhanced, the pumping pressure capacity is greatly improved, and the spraying effect is thus improved.

[0050] When the above-mentioned pump structure is in use, the elastic piston assembly 3 is pressed multiple times. The elastic piston assembly 3 can move up and down in the pump body 1 under the action of its own and the elastic force of the first spring 4, prompting the volume of the liquid storage space to shrink and expand and controlling the opening and closing of the flapper check valve 2 accordingly, so as to realize the function of extracting or pumping the fluid.

[0051] The specific process is as follows:

[0052] 1. Press the elastic piston assembly 3. At this time, the flapper check valve 2 is in the closed state. The pressing rod 32 is forced to move downward. Due to the elastic force of the first spring 4 and the air pressure in the liquid storage space, the piston body 31 is basically stationary or slightly descends;

[0053] 2. As the pressing rod 32 continues to move downward, the bottom of the rod extends out of the piston body 31, and the seal of the diversion channel 321 inside the rod is damaged. At this time, the air in the liquid storage space is discharged outward through the diversion channel 321, and the air pressure decreases and cannot support the piston body 31. The piston body 31 moves downward with the pressing rod 32 under the pressure of the second spring 33, and at the same time compresses the volume of the liquid storage space to further expel the air;

[0054] 3. After the piston body 31 approaches the flapper check valve 2, the pressing on the elastic piston assembly 3 is withdrawn. Under the elastic force of the second spring 33, the pressing rod 32 first moves upward relative to the piston body 31 until the diversion channel 321 is sealed by the piston body 31 again. Then the piston body 31 moves upward under the combined action of the first spring 4 and the second spring 33, and at the same time expands the volume of the liquid storage space to form a negative pressure environment;

[0055] 4. The sealing piece 22 of the flapper check valve 2 is opened at the liquid inlet end 12 under the influence of the negative pressure. At this time, the flapper check valve 2 is in the open state, and the liquid can be sucked into the liquid storage space;

[0056] 5. Repeat steps 1 to 4 (note that what is excluded in step 2 is no longer air but liquid), and the liquid can be pumped outwards by the liquid pump.

[0057] See Figure 2 As shown, in some embodiments, a retaining ring 5 is provided above the pump body 1 to cover the opening of the pump chamber 11 and reduce dust pollution.

[0058] An annular edge 322 for pressing against the second spring 33 is provided on the outer periphery of the pressing rod 32, which facilitates the installation and fixation of the second spring 33, and this annular edge 322 is also used to cooperate with the retaining ring 5. That is, in the initial state, the second spring 33 will cause the annular edge 322 to abut against the retaining ring 5 to form a seal, thereby improving the sealing performance of the pump.

[0059] See Figure 2 and Figure 4 As shown, in some embodiments, a balance air hole 13 is provided on the pump body 1 to balance the internal and external pressure differences of the target container, thereby ensuring the smoothness of liquid suction.

[0060] Specifically, the balance air hole 13 is located above the seal formed by the piston body 31 and the inner wall of the pump body 1. When the elastic piston assembly 3 moves downward, the seal at the retaining ring 5 fails, and the outside air enters the target container through the balance air hole 13 from the retaining ring 5, thereby ensuring that the internal and external air pressures of the target container are consistent.

[0061] See Figure 2 As shown, in some embodiments, a lower spring seat is provided on the flapper check valve 2. The lower spring seat can be integrally formed at the upper end of the valve body 21 of the flapper check valve 2. In addition, an upper spring seat is provided on the elastic piston assembly 3, and the upper spring seat can be inserted into the bottom of the piston body 31. The two ends of the first spring 4 are respectively connected to the upper spring seat and the lower spring seat for installation and fixation.

[0062] See Figure 4 As shown, the present utility model also discloses a nasal sprayer, which includes the pump structure of any one of the above, which enables the spraying effect of the nasal sprayer to be significantly enhanced and improves the competitiveness of the product.

[0063] In this application, the nasal sprayer includes a bottle body 6, a pump structure, an upper shell 7 and an inner core 8. Among them, the bottle body 6 is used for filling the liquid medicine. The liquid pump structure is installed in the bottle body 6, and a liquid suction pipe extending to the bottom of the bottle is connected to the liquid inlet end 12 of the pump body 1. The upper shell 7 is provided above the bottle body 6, and a core cavity channel 71 connected to the elastic piston assembly 3 is provided in the upper shell 7. By pressing the upper shell 7, the elastic piston assembly 3 can be driven to move, so as to pump the liquid medicine in the bottle body 6 into the core cavity channel 71. The inner core 8 is provided in the core cavity channel 71 and forms a spray channel therewith to guide the flow of the liquid medicine and pressurize it, so that the liquid medicine can be released outward in a mist state.

[0064] See Figure 5 As shown, in some embodiments, an eddy current forming groove 711 is provided at the inner top of the core cavity channel 71. After the liquid medicine enters the eddy current forming groove 711, its flow rate and pressure will be enhanced under the action of the eddy current effect, thereby improving the spraying effect.

[0065] Still as Figure 4 As shown, in some embodiments, a dust-proof cover 9 is sleeved outside the upper shell 7, which is used to protect the ejection port of the nasal sprayer to prevent it from being blocked or contaminated. In this application, the dust-proof cover 9 is snap-fitted with the bottle body 6. For example, a card slot is provided on the outer periphery of the bottle body 6, and a buckle is provided at the bottom of the dust-proof cover 9. The buckle and the card slot are snap-connected to detachably fix the dust-proof cover 9 on the bottle body 6.

[0066] 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 principle and purpose 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 these changes should fall within the protection scope of the claims of the present invention.

Claims

1. A pressure pump structure, characterized in that: include: A pump body (1) having a pump chamber (11) with a top opening and a liquid inlet end (12) connected to the pump chamber (11); A plate-type check valve (2) is arranged in the pump chamber (11) at a position close to the liquid inlet end (12); An elastic piston assembly (3) is disposed in the pump chamber (11) and cooperates with the plate-type check valve (2) below the elastic piston assembly (3) to form a liquid storage space; A first spring (4) is arranged between the plate-type check valve (2) and the elastic piston assembly (3); The elastic piston assembly (3) can move up and down in the pump body (1) and control the opening and closing of the plate-type check valve (2) through the elastic force of the elastic piston assembly (3) and the first spring (4), thereby extracting or pumping the fluid.

2. The pressure pump structure according to claim 1, characterized in that: The disc check valve (2) comprises: A valve body (21) is arranged at the bottom of the pump chamber (11); a flow channel boss (211) is arranged at the inner top of the valve body (21); a through hole (212) is arranged at the center of the flow channel boss (211); A sealing sheet (22) is arranged inside the valve body (21) and can move up and down between the liquid inlet end (12) and the flow channel boss (211); the diameter of the sealing sheet (22) is larger than the aperture of the liquid inlet end (12).

3. The pressure pump structure according to claim 1, characterized in that: The elastic piston assembly (3) comprises: The piston body (31) is slidably and sealingly matched with the inner wall of the pump body (1); A pressing rod (32) is inserted into the piston body (31) and can move up and down relative to the piston body (31); a flow guide channel (321) is provided in the pressing rod (32); in an initial state, the flow guide channel (321) is sealed by the piston body (31); A second spring (33) is arranged between the piston body (31) and the pressing rod (32) and is used to provide elastic force for the elastic piston assembly (3).

4. The pressure pump structure according to claim 3, characterized in that: A retaining ring (5) is provided above the pump body (1) to cover the opening of the pump chamber (11), and a ring edge (322) is provided on the outer periphery of the pressing rod (32) to press against the second spring (33); In the initial state, the retaining ring (5) abuts against the ring edge (322) to form a seal.

5. The pressure pump structure according to claim 1, characterized in that: The pump body (1) is provided with a balancing air hole (13).

6. The pressure pump structure according to claim 1, characterized in that: The disc check valve (2) is provided with a lower spring seat, and the elastic piston assembly (3) is provided with an upper spring seat; Two ends of the first spring (4) are respectively connected to the upper spring seat and the lower spring seat.

7. A nasal spray, characterized in that: It comprises a pressure pump structure as described in any one of claims 1 to 6.

8. The nasal spray according to claim 7, characterized in that Also includes: A bottle body (6), wherein a pressure pump structure is arranged inside the bottle body (6); An upper shell (7) is arranged above the bottle body (6), a core cavity channel (71) is arranged in the upper shell (7), and the elastic piston assembly (3) of the pressure pump structure is connected to the core cavity channel (71); An inner core (8) is arranged in the core cavity channel (71) and forms a jet flow channel therewith.

9. The nasal spray according to claim 8, characterized in that The inner top of the core cavity channel (71) is provided with a vortex forming groove (711).

10. The nasal spray according to claim 8, characterized in that The upper shell (7) is provided with a dust cover (9) on its outer shell, and the dust cover (9) is snap-fitted with the bottle body (6).

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