Pump capable of adjusting spraying weight and atomization device

Abstract

The utility model discloses a pump with adjustable spray weight and an atomizing device, which comprise a pump body, a ring part, a piston and a valve core, the ring part extends upwards from the inner bottom of the pump body and divides the interior of the pump body into a first cavity and a second cavity, and the ring part is provided with a transition section with the wall thickness gradually increased from top to bottom; the piston is arranged in the pump body in a sliding and sealing mode and provided with a pipe pressing part extending upwards. The valve element is movably arranged between the piston and the first cavity, and the valve element is provided with a matching part extending downwards; in the liquid suction state, the valve element abuts against the piston in a sealed mode, and the matching part and the ring part are vertically opposite in a spaced mode. In the liquid pumping state, the matching part crosses the transition section and then abuts against the ring part in a sealed mode, and a lateral flow channel is formed among the valve element, the pump body and the piston. According to the pump capable of adjusting the spray weight and the atomization device, on the basis that an existing pump structure is not changed, the spray weight of the pump can be adjusted by forming the transition section on the ring part, and the pump and the atomization device have the advantages of being small in change, low in cost and convenient to adjust the spray weight.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a pump and atomizing device with adjustable spray weight. Background Technology

[0002] Nasal sprays are a common medical device that fills a special device with raw drugs or appropriate excipients. When used, the drug is released in a mist form by the pressure of a pump. They are mostly used for inhalation into the lungs or sprayed directly onto the mucous membranes of cavities and the skin.

[0003] In nasal atomizers, the spray weight per spray is mainly determined by the pump. By adjusting the pump's spray weight, the flow rate of the liquid can be changed; or the pressure of the spray system can be kept stable to prevent spray abnormalities or malfunctions caused by excessively high / low pressure; it can also enhance the mixing effect with the target substance and improve the uniformity of the mixture, etc.

[0004] However, the spray weight of existing pumps cannot be adjusted, making it difficult to meet the needs of different environments. Therefore, this application proposes a new type of pump with adjustable spray weight to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a pump and atomizing device with adjustable spray weight. By designing a gradient section in the upper part of the ring, the downward movement required for the mating part and the ring to form a seal is extended, thereby indirectly shortening the compression stroke of the piston and achieving the purpose of adjusting the spray weight.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An adjustable-weight pump, comprising:

[0008] Pump body;

[0009] The ring extends upward from the inner bottom of the pump body and divides its interior into a first cavity and a second cavity. The ring has a gradually thickening section from top to bottom.

[0010] A piston is slidably and sealingly disposed within the pump body, the piston having an upwardly extending pressure tube portion;

[0011] A valve core is movably disposed between the piston and the first cavity, and the valve core has a downwardly extending mating portion;

[0012] In the liquid suction state, the valve core and the piston are in abutting and sealing position, and the mating part and the ring part are vertically spaced and opposite each other; in the liquid pumping state, the mating part abuts and seals with the ring part after passing the transition section, and a lateral flow channel is formed between the valve core, the pump body and the piston.

[0013] In some embodiments, the gradient segment is inclined from the upper end of the ring toward the middle, and the angle between the gradient segment and the vertical plane is 4°-7°.

[0014] In some embodiments, the gradient segment occupies 1 / 4 to 1 / 2 of the length of the ring portion.

[0015] In some embodiments, a sealing rib is provided on the inner side of the mating part, and the sealing rib transitions from a clearance fit to an interference fit with the ring part as the valve core moves down.

[0016] In some embodiments, a spring is also included, the spring being disposed between the valve core and the second cavity.

[0017] In some embodiments, the valve core further has a downwardly extending first protrusion, and the second cavity is provided with an upwardly extending vertical tube portion;

[0018] The two ends of the spring are respectively sleeved on the first protrusion and the tube, and in the pumping state, the first protrusion can abut and seal against the vertical tube.

[0019] In some embodiments, the pressure tube section is provided with a central flow channel, which communicates with the lateral flow channel, and the central flow channel is provided with a plurality of expansion cavities of different diameters along the axial direction.

[0020] In some embodiments, the valve core further has an upwardly extending second protrusion;

[0021] In the liquid suction state, the second protrusion abuts and seals against the pressure tube; in the liquid pumping state, the second protrusion separates from the pressure tube.

[0022] In some embodiments, a guide ring is provided on the outer periphery of the valve core, the guide ring slides with the pump body, and a plurality of guide grooves are provided on the outer periphery of the guide ring at intervals.

[0023] An atomizing device comprising the aforementioned adjustable spray weight pump.

[0024] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0025] 1. Without significantly altering the existing pump structure, the pump's spray weight can be adjusted by creating a gradual transition section in the ring section. This method offers advantages such as minimal modification, low cost, and convenient spray weight adjustment.

[0026] 2. The mating parts and the ring parts adopt a butt-fitting seal to prevent backflow, which enables the pump to perform the pumping function in any position, significantly improving operability and making it convenient to use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the adjustable spray weight pump of this utility model in the liquid suction state.

[0028] Figure 2 This is a schematic diagram of the adjustable spray weight pump of this utility model in the pumping liquid state.

[0029] Figure 3 This is a schematic diagram of the valve core of this utility model.

[0030] Figure 4 This is a schematic diagram of the atomizing device of this utility model.

[0031] In the diagram: 1. Pump body; 11. First chamber; 12. Second chamber; 13. Vertical pipe section; 2. Ring section; 21. Gradient section; 3. Piston; 31. Pressure pipe section; 311. Central flow channel; 312. Expansion chamber; 4. Valve core; 41. Fitting part; 42. Sealing rib; 43. First protrusion; 44. Second protrusion; 45. Guide ring; 46. Flow guide groove; 5. Lateral flow channel; 6. Spring. Detailed Implementation

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary 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 the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0033] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0034] This utility model discloses an adjustable spray weight pump, including a pump body 1, a ring 2, a piston 3, and a valve core 4.

[0035] See Figure 1 and Figure 2 As shown, the pump body 1 is generally tubular in shape, with an inlet at its bottom. The ring 2, piston 3, and valve core 4 are all located inside the pump body 1. The ring 2 extends upward from the inner bottom of the pump body 1 and divides its interior into a first chamber 11 and a second chamber 12. In this application, the first chamber 11 is used to buffer the liquid inside the pump, while the second chamber 12 is used to connect to the inlet.

[0036] In addition, the ring 2 has a gradually thickening section 21 that increases in wall thickness from top to bottom. Specifically, the gradually thickening section 21 is inclined from the upper end of the ring 2 toward the middle to form a conical structure. This conical structure is used to adjust the compression stroke of the piston 3 (see below) to adjust the pump's injection weight.

[0037] The piston 3 is slidably and sealingly disposed within the pump body 1. The piston 3 has an upwardly extending pressure tube portion 31. By operating the pressure rod portion and cooperating with the spring 6, the piston 3 can slide up and down within the pump body 1, thereby providing power for pumping or suctioning liquid. In this application, the cross-section of the piston 3 is preferably a “)(” shaped structure, which allows both the upper and lower ends of the piston 3 to form a seal with the inner wall of the pump body 1, thereby improving the sealing performance of the piston 3.

[0038] The valve core 4 is movably disposed between the piston 3 and the first chamber 11. The valve core 4 has a downwardly extending mating part 41. In this application, the mating part 41 is a cylindrical structure that matches the ring part 2. In the liquid suction state, it is vertically spaced relative to the ring part 2, so that liquid can flow from the second chamber 12 into the first chamber 11. In the liquid pumping state, it passes through the transition section 21 and then abuts and seals with the ring part 2 to ensure the normal operation of the liquid pumping function.

[0039] Figures 1 to 2 The diagram illustrates the state changes of the pump described in this application. Specifically, in the suction state, the piston 3 (under the action of the spring 6) abuts and seals with the valve core 4, pushing the valve core 4 upward, causing a negative pressure to form inside the pump body 1. Simultaneously, the mating part 41 of the valve core 4 and the ring part 2 are vertically spaced and opposite each other, and the liquid is drawn into the second chamber 12 and overflows into the first chamber 11 for buffering. In the pumping state, the piston 3 can drive the valve core 4 to move downward (during which the spring 6 is compressed). As the mating part 41 of the valve core 4 passes the transition section 21 and abuts and seals with the ring part 2, the piston 3 and the valve core 4 continue to move downward, the space of the first chamber 11 is gradually compressed, and the pressure of the liquid increases. The liquid moves upward along the gap between the inner wall of the pump body 1 and the mating part 41, and squeezes the valve core 4 (the valve core 4 moves downward) to separate from the piston 3, forming a new gap. The two gaps together constitute the lateral flow channel 5, and this flow channel connects to the pressure tube part 31 of the piston 3, allowing the liquid to be pumped out from the pressure tube part 31.

[0040] By continuously controlling the piston 3 to move up and down, the pump can switch back and forth between the liquid suction state and the liquid pumping state, thereby realizing the jetting function. Furthermore, during the liquid pumping process, since the mating part 41 and the ring part 2 adopt a check seal by abutting (traditionally, a ball bearing abuts against the liquid inlet hole, which requires the pump body 1 to be in a vertical position), this pump can realize the liquid pumping function in any posture, significantly improving operability and making it more convenient to use.

[0041] It is understandable that during the operation of the pump, the piston 3 actually compresses the first chamber 11 only after the mating part 41 and the ring part 2 have abutted and sealed. In other words, the transition section 21 determines the compression stroke of the piston 3. More specifically, the earlier the mating part 41 abuts and seals with the ring part 2, the greater the compression stroke of the piston 3, and the greater the pump's spray weight. In this application, the pump's spray weight can be adjusted by controlling the inclination and / or length of the transition section 21.

[0042] For example, in some embodiments, the angle between the transition section 21 and the vertical plane is 4°-7°. If the angle is less than 4°, the reduction in the top wall thickness of the ring 2 is not significant, the clearance fit between the transition section 21 and the mating part 41 is not obvious, and premature sealing is likely to occur, resulting in the pump's spray weight not being able to be reduced compared to the original. If the angle is greater than 7°, the length of the transition section 21 is too short, and the control over the compression stroke of the piston 3 is relatively limited, which may result in no significant change in the pump's spray weight. However, an angle within the range of 4°-7° can ensure a clearance fit between the transition section 21 and the mating part 41 without forming a seal, and provides sufficient length for the ring 2 to ensure that the subsequent compression stroke of the piston 3 is not affected. In this application, the angle between the transition section 21 and the vertical plane can be 4°, 5°, 6°, etc., specifically selected according to the required spray weight of the pump.

[0043] Alternatively, in some embodiments, the transition section 21 occupies 1 / 4 to 1 / 2 of the length of the ring 2. By controlling the length of the transition section 21, the compression stroke of the piston 3 can be changed, and the injection weight can also be adjusted compared to the original pump.

[0044] See Figures 1 to 3 As shown, in some embodiments, a sealing rib 42 is provided on the inner side of the mating part 41 to enhance the sealing between the mating part 41 and the ring part 2 and improve the pumping effect. In this application, the sealing rib 42 is an arc-shaped protrusion, which can be integrally formed on the bottom inner wall of the mating part 41, and as the valve core 4 moves down, it transitions from a clearance fit to an interference fit with the ring part 2.

[0045] Or as Figure 1 and Figure 2 As shown, in some embodiments, the pump with adjustable spray weight also includes a spring 6, which is disposed between the valve core 4 and the second chamber 12 to support the valve core 4 and provide elastic force for its reset.

[0046] Specifically, the valve core 4 also has a downwardly extending first protrusion 43, and the second cavity 12 is provided with an upwardly extending vertical tube 13. The two ends of the spring 6 are respectively sleeved on the first protrusion 43 and the tube, thereby realizing the positioning and installation of the spring 6.

[0047] Furthermore, in the pumping state, the first protrusion 43 can abut against the vertical tube 13 to seal, that is, when the piston 3 moves to the bottom, the vertical tube 13 can abut against the first protrusion 43 to limit it, and at the same time block the pipe opening to form a second seal to prevent liquid backflow.

[0048] In some embodiments, a central flow channel 311 is provided inside the pressure tube 31, which connects to the lateral flow channel 5. Pressurized liquid enters the central flow channel 311 through the lateral flow channel 5, thereby realizing the function of pumping liquid outward. Furthermore, the central flow channel 311 is provided with multiple expansion cavities 312 of different diameters along the axial direction. These cavities are used to prevent shrinkage of the pressure tube 31 during injection molding due to excessive wall thickness, ensuring the stability of the central flow channel 311 during molding.

[0049] In some embodiments, the valve core 4 further has an upwardly extending second protrusion 44. In the suction state, the second protrusion 44 abuts and seals against the pressure tube portion 31. Specifically, the tip of the second protrusion 44 extends into the central flow channel 311 of the pressure tube portion 31 under the action of the spring 6 and seals against it, ensuring the airtightness of the pump's internal space. In the pumping state, the second protrusion 44 separates from the pressure tube portion 31. Specifically, the high-pressure liquid flows between the piston 3 and the valve core 4. Under hydraulic pressure, the spring 6 is further compressed, causing the valve core 4 to move downward, separating the second protrusion 44 from the pressure tube portion 31 to form a new gap for the liquid to be pumped outwards.

[0050] See Figure 3 As shown, in some embodiments, a guide ring 45 is provided on the outer periphery of the valve core 4. The guide ring 45 slides with the pump body 1 to improve the stability of the valve core 4's up-and-down movement. Furthermore, a plurality of guide grooves 46 are provided at intervals on the outer periphery of the guide ring 45. These guide grooves 46 connect the gap between the inner wall of the pump body 1 and the mating part 41, and the new gap formed by the separation of the valve core 4 and the piston 3, ensuring that the liquid can flow from the lateral flow channel 5 to the central flow channel 311.

[0051] See Figure 4 As shown, this utility model also discloses an atomizing device, such as a nasal sprayer. The device includes the aforementioned adjustable spray weight pump. Without significantly altering the existing pump structure, the spray weight of the pump can be adjusted by forming a gradient section 21 in the ring 2. This has the advantages of minimal modification, low cost, and convenient spray weight adjustment.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A pump with adjustable spray weight, characterized in that, include: Pump body (1); The ring (2) extends upward from the inner bottom of the pump body (1) and divides its interior into a first cavity (11) and a second cavity (12). The ring (2) has a gradually thickening section (21) from top to bottom. The piston (3) is slidably and sealingly disposed within the pump body (1), and the piston (3) has an upwardly extending pressure tube portion (31). The valve core (4) is movably disposed between the piston (3) and the first cavity (11), and the valve core (4) has a downwardly extending mating portion (41). In the liquid suction state, the valve core (4) and the piston (3) abut and seal, and the mating part (41) and the ring part (2) are vertically spaced and opposite to each other; in the liquid pumping state, the mating part (41) abuts and seals with the ring part (2) after passing the transition section (21), and a lateral flow channel (5) is formed between the valve core (4), the pump body (1) and the piston (3).

2. The pump with adjustable spray weight according to claim 1, characterized in that, The gradient segment (21) is inclined from the upper end of the ring (2) toward the middle, and the angle between the gradient segment (21) and the vertical plane is 4°-7°.

3. The pump with adjustable spray weight according to claim 1, characterized in that, The gradient segment (21) occupies 1 / 4 to 1 / 2 of the length of the ring (2).

4. The pump with adjustable spray weight according to claim 1, characterized in that, The inner side of the mating part (41) is provided with a sealing rib (42), and the sealing rib (42) moves down with the valve core (4) and transitions from clearance fit to interference fit with the ring part (2).

5. The pump with adjustable spray weight according to claim 1, characterized in that, It also includes a spring (6) disposed between the valve core (4) and the second cavity (12).

6. The pump with adjustable spray weight according to claim 1, characterized in that, The valve core (4) also has a downwardly extending first protrusion (43), and the second cavity (12) is provided with an upwardly extending vertical tube (13). The two ends of the spring (6) are respectively sleeved on the first protrusion (43) and the tube, and in the pumping state, the first protrusion (43) can abut and seal with the vertical tube (13).

7. The pump with adjustable spray weight according to claim 1, characterized in that, The pressure tube section (31) is provided with a central flow channel (311), which is connected to the lateral flow channel (5), and the central flow channel (311) is provided with multiple expansion cavities (312) of different diameters along the axial direction.

8. The pump with adjustable spray weight according to claim 7, characterized in that, The valve core (4) also has an upwardly extending second protrusion (44). In the liquid suction state, the second protrusion (44) abuts and seals with the pressure tube (31), and in the liquid pumping state, the second protrusion (44) separates from the pressure tube (31).

9. The pump with adjustable spray weight according to claim 1, characterized in that, The valve core (4) is provided with a guide ring (45) on its outer periphery. The guide ring (45) slides with the pump body (1), and the outer periphery of the guide ring (45) is provided with a plurality of guide grooves (46) at intervals.

10. An atomizing device, characterized in that, Including the adjustable spray weight pump as described in any one of claims 1-9.

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