Non-single dose pumping method and apparatus

Abstract

The application discloses a non-single dose pumping method and device, which comprises a nozzle, a water core, a steel needle, a pipe body, a piston and an indicating window. A plurality of independent liquid storage cavities are arranged in the device, the steel needle moves with the water core to successively pierce the piston and extrude the liquid in the cavity to realize divided administration. The window arranged on the nozzle is matched with the physical linkage of the pipe seat, and can intuitively indicate the residual dose state. Through the cooperation of the one-way protrusion, the groove and the conical locking mechanism, the precision control of the pumping stroke is ensured, the technical defects of the traditional pump body, such as the ambiguous residual amount indication, the failure of the gear shifting structure, the flow channel leakage and the cross contamination, are effectively solved, and the precision and reliability of the quantitative multiple administration are significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of non-single-dose pumping metering technology, specifically relating to a non-single-dose pumping method and apparatus. Background Technology

[0002] Dosing spray pumps are widely used in pharmaceuticals and high-end daily chemical products, delivering a fixed dose of liquid with a single press to achieve quantitative drug delivery; however, existing dual-dose or multi-dose pumps generally suffer from the following serious technical defects:

[0003] The remaining amount indication is vague and inaccurate; most pumps do not have intuitive and dynamic drug remaining amount indicators inside, so users or medical staff cannot accurately determine what dosage stage the device is currently in. This can easily lead to misjudgment and premature disposal when the drug is not used up, or to continuing to press the pump when the drug is exhausted, resulting in insufficient drug dosage and seriously affecting the treatment effect.

[0004] Therefore, in order to overcome the above-mentioned defects, there is an urgent need for a non-single-dose pumping method and device that can overcome these defects. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes a non-single-dose pumping method and apparatus. Through a dynamically changing indicator window, it achieves multi-level visual indication of the remaining medication in a dual-dose pump, overcoming the shortcomings of ambiguous and insufficient precision in the remaining amount indication in existing technologies. It can also completely resolve the technical defects of ambiguous indication and unreliable dosage stroke in quantitative multiple-dose administration devices.

[0006] This application aims to solve one of the problems in the background art. The technical solution adopted by the present invention is as follows: To achieve the above-mentioned objective and other related objectives, the present invention provides the following technical solution:

[0007] A non-single dose pumping method includes at least a first pumping position and a second pumping position, wherein the first pumping position and the second pumping position are two independent dose pumping positions, and each pumping position is provided with an independent liquid storage chamber.

[0008] At the first pumping position, a first liquid storage chamber is formed by sealing between the water core and the pipe body. The water core moves relative to the pipe body to squeeze the first liquid storage chamber, and the liquid in the first liquid storage chamber is squeezed and pumped, and sent into the nozzle along the pumping pipeline.

[0009] At the second pumping position, the insert pierces the wall of the first liquid storage chamber and enters the second liquid storage chamber. The water core moves relative to the tube body and squeezes the second liquid storage chamber. The liquid in the second liquid storage chamber is squeezed and pumped, and sent into the nozzle along the pumping pipeline.

[0010] The insertion part is equipped with barbs, which makes it irreversible and impossible to retract after insertion, keeping the insertion part inside the object and allowing it to be used unidirectionally to continue inserting deeper.

[0011] The technical solution provided in this application also has the following technical features:

[0012] Preferably, in one embodiment of this application, the stroke of the water core corresponds to the stroke of the squeezing liquid storage chamber, and is provided with a scale or a limit buckle.

[0013] Preferably, in one embodiment of this application, an observation window or scale is provided for observing the position of the water core or tube body, and correspondingly identifying the remaining quantity of unused storage chambers.

[0014] Preferably, in one embodiment of this application, the tube body is equipped with a reset component and a one-way limiting component, the movement direction of the pressing water core is positive, and the reset direction of the water core is negative;

[0015] The reset component causes the water core and tube to move in the opposite direction, ensuring that the next forward stroke of the water core is not less than the target stroke.

[0016] The one-way limiting component is used to limit the movement of the tube body. During the process of the water core squeezing the first and second liquid storage chambers and piercing the wall of the first liquid storage chamber, the one-way limiting component restricts the movement of the tube body and keeps the tube body stationary. When the water core moves in the opposite direction, the one-way limiting component does not restrict the tube body and allows the tube body to move in the opposite direction along with the water core.

[0017] Preferably, in one embodiment of this application, the insertion part is disposed at the inlet of the pumping pipeline.

[0018] Preferably, in one embodiment of this application, a non-single-dose pumping device includes a nozzle, a water core, a steel needle, a pressing cap, and a tube. The nozzle and the outlet of the water core are connected. A steel needle is disposed inside the water core, with its lower end extending out of the water core. The pressing cap is used to drive the nozzle, the water core, and the steel needle to move toward the tube. A piston is disposed inside the tube. A first liquid storage chamber is formed by sealing the water core, the piston, and the inlet section of the tube. A second liquid storage chamber is separated between the piston and the end section of the tube other than the inlet section. After the piston is pressed against by the water core, the piston squeezes and pumps the liquid in the second liquid storage chamber.

[0019] Preferably, in one embodiment of this application, a matching one-way protrusion and one-way groove are provided between the card holder and the tube holder. The card holder moves from the initial mating position of the tube holder to the end mating position, so that the water core squeezes the liquid storage chamber one by one to complete the pumping of liquid.

[0020] After the liquid pumping in the first storage chamber is completed, when the card seat moves in the opposite direction due to the spring, the cooperation of the one-way protrusion and the one-way groove causes the card seat to drive the tube seat and tube body to move in the opposite direction.

[0021] Preferably, in one embodiment of this application, the inner wall of the card holder is provided with a one-way protrusion, and the side of the one-way protrusion away from the nozzle outlet side is provided with an inclined surface;

[0022] The outer wall of the tube seat is provided with a one-way groove, and the side of the one-way groove away from the nozzle outlet is provided with a slope.

[0023] Preferably, in one embodiment of this application, the lower inlet section of the nozzle is sleeved on the upper inlet section of the starter, and a spring and a retainer are provided. The retainer is used to limit the nozzle, and a one-way sliding pair is formed between the retainer and the pipe seat.

[0024] The bracket support is set on the internal step of the nozzle, with one end of the bracket's abutting spring and the other end of the starter's bottom abutting spring;

[0025] The nozzle and starter are fitted with a protrusion at the connection point, which limits the nozzle to the initial position on the upper part of the starter. A sliding pair is formed between the nozzle and the starter, and a spring moves the nozzle and the starter back to the initial position.

[0026] Preferably, in one embodiment of this application, the press cap is fixed to the outer wall of the nozzle.

[0027] Preferably, in one embodiment of this application, the tube body is inserted into the tube seat, and the tube body and the tube seat are interference fit, so that the tube seat and the tube body are fixedly disposed, and the tube seat is used to support and protect the tube body.

[0028] Preferably, in one embodiment of this application, the tube seat support is disposed on the starter.

[0029] Preferably, in one embodiment of this application, the outer wall of the tube seat is provided with a check protrusion, the lower end of the tube seat extends into the conical lock, the bottom of the starter is provided with a conical lock, the conical lock limits the check protrusion to prevent reverse movement, so that the tube seat only has the freedom to move in the opposite direction.

[0030] Preferably, in one embodiment of this application, the piston and the tube body are in a sealed fit.

[0031] Preferably, in one embodiment of this application, a piston is provided on the tube body to isolate the liquid storage chamber; the cavity wall pierced by the piercing part is composed of the piston.

[0032] Preferably, in one embodiment of this application, the pumping pipeline is located at the center of the steel needle, and the steel needle is a hollow needle.

[0033] Preferably, in one embodiment of this application, when pumping liquid into the first storage chamber, the pumping pipeline includes the gap between the water core and the steel needle.

[0034] Preferably, in one embodiment of this application, two or more pistons are provided in the tube body, so that adjacent pistons and the tube body form independent liquid storage chambers, forming at least a third liquid storage chamber.

[0035] Preferably, in one embodiment of this application, a viewing window is provided on the nozzle for observing the position of the tube body or tube seat and for identifying the remaining dose status.

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0037] Compared with the prior art, the technical solution of this application has achieved the following technical advancements:

[0038] 1. To address the issues of ambiguous and low-precision residual indication in existing dual-dose pumps, a combination of component hard linkage and a viewing window is adopted to achieve accurate graded indication. This overcomes the shortcomings of existing single-level indication, which cannot be adapted to dual-dose scenarios, and users are prone to misjudgment or insufficient dosage due to empty pressing, thereby improving the accuracy and safety of drug use.

[0039] 2. To address the issues of existing pump body stroke shifting structures being prone to failure and jamming or slippage due to manufacturing tolerances and material fatigue during actual use, precise stroke control is achieved through the matching unidirectional protrusion and groove between the card holder and the tube seat, ensuring the high stability of the multiple drug delivery system.

[0040] 3. To address the issue of leakage and cross-contamination in existing multiple-dose administration systems after the first dose, a structure is adopted that uses a steel needle inserted into an independent piston to separate the storage chamber, achieving physical isolation of the storage chamber and making it suitable for independent storage and administration. Attached Figure Description

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0042] Figure 1 This is a front view of a non-single-dose pumping device according to one embodiment;

[0043] Figure 2 This is a top view of a non-single-dose pumping device according to one embodiment;

[0044] Figure 3 This is an embodiment Figure 2 Half-section view AA;

[0045] Figure 4 This is an embodiment Figure 2 Available two-dose status vertical color half-section view;

[0046] Figure 5 This is an embodiment Figure 2 Available dose status vertical color half-section view;

[0047] Figure 6 This is an embodiment Figure 2 A vertical color half-section view of the available 0-dose state;

[0048] Components in the diagram:

[0049] 1. Sprayer head

[0050] 102. Windows

[0051] 2. Water core

[0052] 3. Steel needles

[0053] 4. Press the cap

[0054] 5. Piston

[0055] 6. Booth Seats

[0056] 7. Tube seat

[0057] 8. Spring

[0058] 9. Pipe body

[0059] 10. Starter

[0060] 101. Conical Locking

[0061] 701. Check point. Detailed Implementation

[0062] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings. These embodiments are only for illustrating this application and are not intended to limit the invention.

[0063] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0066] Existing dual-dose spray pumps or multi-dose pumps have the following technical drawbacks:

[0067] The stroke shifting structure is prone to failure; some improved metering pumps have introduced damping bosses or rotating ramps for segmented positioning; however, in actual use, due to the manufacturing tolerances of plastic components, material fatigue softening, and differences in the amount of pressure applied by the user, such friction positioning components are prone to jamming, slipping, or mis-positioning during reverse reset; this may not only prevent the subsequent chamber from being smoothly connected during the second press, but may even directly break through the damping position during the first press, causing both doses of medicine to be sprayed out simultaneously in a single press, posing a great safety hazard;

[0068] Flow channel leakage and cross-contamination; In traditional multiple-dose delivery systems, after the first dose is injected, the fluid in the subsequent storage chamber is often indirectly connected to the external channel through a shared one-way valve; During long-term storage, it is very easy to cause oxidation, deterioration, volatilization leakage or cross-contamination, making it unsuitable for highly active drug formulations;

[0069] To address the aforementioned technical bottlenecks, this invention proposes a quantitative multiple pumping method and device with a multi-level margin indicator window. Through a unique physical hard linkage mechanism and a stepping indicator window, it achieves high-precision and high-stability liquid pumping and indicator feedback.

[0070] like Figure 1-6 A non-single dose pumping method includes at least a first pumping position and a second pumping position, wherein the first pumping position and the second pumping position are two independent dose pumping positions, and each pumping position is provided with an independent liquid storage chamber.

[0071] When in the first pumping position, a first liquid storage chamber is formed between the water core 2 and the pipe body 9. The water core 2 moves relative to the pipe body 9 to squeeze the first liquid storage chamber. The liquid in the first liquid storage chamber is squeezed and pumped, and sent into the nozzle 1 along the pumping pipeline.

[0072] In the second pumping position, the insert pierces the wall of the first liquid storage chamber and enters the second liquid storage chamber. The water core 2 moves relative to the pipe body 9 to squeeze the second liquid storage chamber. The liquid in the second liquid storage chamber is squeezed and pumped, and sent into the nozzle 1 along the pumping pipeline.

[0073] Specifically, in one embodiment of this application, the stroke of the water core 2 corresponds to the stroke of the squeezing storage chamber, and is provided with a scale or limit buckle; the scale or limit buckle is set on the relatively moving component, and the remaining dose is determined by observing the pumping position through the transparent window; the key is that the stroke spacing must be precisely matched with the preset position of each storage chamber so that it can complete the pumping accordingly.

[0074] Specifically, in one embodiment of this application, an observation window or scale is provided to observe the position of the water core 2 or the tube 9, and to identify the remaining quantity of unused liquid in the reservoir. Since the water core 2 and the tube 9 are in relative motion, it is sufficient to observe one of them, which is achieved by printing a progress bar. The side wall of the water core 2 or the tube 9 is provided with a color development area corresponding to the remaining dose. When the water core 2 moves relative to the tube 9, the visible width or position of the color development area is changed through the transparent window.

[0075] Specifically, in one embodiment of this application, the tube body 9 is equipped with a reset component and a one-way limiting component, the moving direction of the water core 2 is positive, and the reset direction of the water core 2 is negative;

[0076] The reset component causes the water core 2 and the tube 9 to move in the opposite direction, so that the next forward stroke of the water core 2 is not less than the target stroke;

[0077] The one-way limiting component is used to limit the tube body 9. During the process of the water core 2 squeezing the first liquid storage chamber and the second liquid storage chamber, and piercing the cavity wall of the first liquid storage chamber, the one-way limiting component restricts the movement of the tube body 9 and keeps the tube body 9 stationary. When the water core 2 moves in the opposite direction, the one-way limiting component does not restrict the tube body 9, and the tube body 9 moves in the opposite direction with the water core 2.

[0078] This is achieved by setting a spring (reset assembly) and a ratchet-type one-way limiting slot (one-way limiting assembly); during the forward stroke, the tube 9 is locked to the outer shell by the one-way limiting assembly, ensuring that the water core 2 can generate sufficient pumping pressure through extrusion and pierce the cavity wall, at which time the tube 9 remains stationary; during the reverse stroke, due to the axial thrust provided by the reset spring, the one-way limiting assembly automatically releases the lock, driving the tube 9 to reset as a whole with the water core 2;

[0079] The spring force coefficient of the reset component must be greater than the frictional resistance of the water core 2 in each stroke to ensure complete reset and avoid idle stroke.

[0080] Specifically, in one embodiment of this application, the piercing part is located at the inlet of the pumping pipeline; after the piercing part completes the piercing action, it needs to have a certain conical self-sealing capability, that is, the contact surface between the piercing part and the pierced object is sealed to ensure that the liquid medicine can only enter the nozzle along the specified flow channel during the squeezing and pumping process.

[0081] Specifically, in one embodiment of this application, a non-single-dose pumping device includes a nozzle 1, a water core 2, a steel needle 3, a pressing cap 4, and a tube 9. The nozzle 1 and the outlet of the water core 2 are connected. The steel needle 3 is disposed inside the water core 2, with its lower end extending out of the water core 2. The pressing cap 4 is used to drive the nozzle 1, the water core 2, and the steel needle 3 to move toward the tube 9. A piston 5 is disposed inside the tube 9. A first liquid storage chamber is formed by sealing the water core 2, the piston 5, and the inlet section of the tube 9. A second liquid storage chamber is separated between the piston 5 and the end section of the tube 9 outside the inlet section. After the piston 5 is pressed against by the water core 2, the piston 5 squeezes and pumps the liquid in the second liquid storage chamber.

[0082] In this embodiment, the nozzle 1, water core 2, and steel needle 3 are integrated into a transmission assembly consisting of a pressing cap 4, enabling sequential operation of the segmented liquid storage space within the tube body 9. A piston 5 serves as a median partition, dividing the tube body 9 into two interconnected chambers. During operation, the pressing cap 4 pushes down, causing the water core 2 and steel needle 3 to move synchronously. First, the water core 2 directly squeezes the first liquid storage chamber to complete the initial pumping. Then, the steel needle 3, along with the water core 2, penetrates the bottom of the tube body 9, piercing the piston 5 and resisting its movement, thus transforming the piston 5 into a power source for squeezing the second liquid storage chamber. The piston 5, with its separating function, is made of silicone or high-density PE material with good compression resilience, ensuring static sealing with the inner wall of the tube body 9. It also maintains sufficient friction before and after piercing to prevent pressure leakage due to excessive looseness. The piston's hardness ensures uniform force distribution when pierced by the steel needle, preventing deviation.

[0083] Specifically, in one embodiment of this application, the insertion section of the steel needle 3 is provided with barbs and oblique teeth, so that after the steel needle 3 is inserted, it can drive the inserted object to retract; this can further simplify the structure and reduce the number of accessories.

[0084] In this embodiment, by setting an oblique barb at the end of the steel needle 3, the barb embeds into the piston material during the process of piercing the piston 5. The mechanical locking action ensures that when the water core 2 moves back to reset, the pierced piston 5 can be "hooked" back synchronously, thereby achieving a forced reset of the pumping system stroke. The tooth angle of the barb is between 5° and 30°, which is necessary to ensure that the resistance is minimized during piercing and that sufficient anchoring force is provided during withdrawal.

[0085] Specifically, in one embodiment of this application, a matching one-way protrusion and one-way groove are provided between the card holder 6 and the tube seat 7. The card holder 6 moves from the initial mating position of the tube seat 7 to the end mating position, so that the water core 2 squeezes the liquid storage chamber one by one to complete the pumping of liquid.

[0086] After the liquid pumping of the first storage chamber is completed, when the card seat 6 moves in the opposite direction due to the contact of the spring 8, the cooperation of the one-way protrusion and the one-way groove causes the card seat 6 to drive the tube seat 7 and the tube body 9 to move in the opposite direction.

[0087] The unidirectional protrusion and groove between the card holder 6 and the tube seat 7 form a unidirectional transmission stroke, realizing the segmented progression of the pumping stroke. During the forward pressing stage, this mating structure allows the card holder 6 to move across the groove, but during reverse reset, the unidirectional structure enters a locked state. Under the force of the spring 8, the tube seat 7 and the tube body 9 can rebound as a whole with the card holder 6, completing the reset of the pumping stroke.

[0088] Specifically, in one embodiment of this application, the inner wall of the card holder 6 is provided with a one-way protrusion, and the side of the one-way protrusion away from the outlet side of the nozzle 1 is provided with a slope.

[0089] The outer wall of the tube seat 7 is provided with a one-way groove, and the side of the one-way groove away from the outlet side of the nozzle 1 is provided with an inclined surface;

[0090] By utilizing the wedge effect of the inclined plane, it is ensured that when the card holder 6 moves downward, it can easily break away from the current fixed position and smoothly enter the next state position. When it retracts in the opposite direction, the non-inclined side (i.e. the blocking side) can quickly form a rigid contact, ensuring the synchronous follow-up of the tube body 9.

[0091] Specifically, in one embodiment of this application, the lower inlet section of the nozzle 1 is sleeved on the upper inlet section of the starter 10, and a spring 8 and a retainer 6 are provided. The retainer 6 is used to limit the nozzle 1, and a one-way sliding pair is formed between the retainer 6 and the tube seat 7.

[0092] The card holder 6 is supported on the inner step of the nozzle 1, and one end of the card holder 6 is in contact with the spring 8, and the bottom of the starter 10 is in contact with the other end of the spring 8.

[0093] A protrusion is provided at the joint between the nozzle 1 and the starter 10 to limit the nozzle 1 to the initial position on the upper part of the starter 10. A sliding pair is formed between the nozzle 1 and the starter 10. The spring 8 moves the nozzle 1 and the starter 10 back to the initial position.

[0094] In this embodiment, the sliding pair between the nozzle 1 and the starter 10, combined with the elastic feedback of the spring 8, forms the driving basis for the overall pumping action. The step support of the inner wall of the nozzle 1 supports the card seat 6, so that the spring 8 is in a pre-compressed state. The one-way sliding pair formed by the card seat 6 and the tube seat 7 ensures that the force can be stably transmitted to the tube body 9 when pressed, and the device can be reset to the initial locked position when released.

[0095] Specifically, in one embodiment of this application, the press cover 4 is fixed to the outer wall of the nozzle 1; the force input point of the external force is optimized; the press cover 4 serves as a user interface, and its function is to disperse the pressing stress and protect the nozzle 1 from uneven liquid output caused by radial deformation.

[0096] Specifically, in one embodiment of this application, the tube body 9 is inserted into the tube seat 7, and the tube body 9 and the tube seat 7 are interference-fitted to fix the tube seat 7 and the tube body 9 together. The tube seat 7 is used to support and protect the tube body 9. Through the interference fit between the tube body 9 and the tube seat 7, the liquid storage chamber module and the transmission module are integrated into a rigid whole. The tube seat 7 not only provides structural support, but also plays a protective role in preventing the tube body 9 from deforming and breaking due to high-pressure pumping.

[0097] Specifically, in one embodiment of this application, the tube seat 7 is supported on the starter 10; the outer wall of the tube seat 7 is provided with a check protrusion 701, the lower end of the tube seat 7 extends into the conical lock 101, the bottom of the starter 10 is provided with a conical lock 101, the conical lock 101 limits the check protrusion 701 to prevent reverse movement, so that the tube seat 7 has only the freedom to move in the opposite direction; thus realizing the physical restriction on the unidirectional displacement of the tube seat 7.

[0098] Specifically, in one embodiment of this application, the piston 5 and the tube 9 are sealed together by an interference fit.

[0099] Specifically, in one embodiment of this application, a piston 5 is provided on the tube body 9 to isolate the liquid storage chamber; the cavity wall pierced by the piercing part is composed of the piston 5; in the multi-cavity structure, the piston 5 directly constitutes the cavity wall for the piercing part.

[0100] Specifically, in one embodiment of this application, the pumping pipeline is located at the center of the steel needle 3, which is a hollow needle; this simplifies the spray path.

[0101] Specifically, in one embodiment of this application, when pumping liquid into the first storage chamber, the pumping pipeline includes the gap between the water core 2 and the steel needle 3; the flow is guided by the annular gap between the water core 2 and the steel needle 3, which effectively reduces the pumping resistance.

[0102] Specifically, in one embodiment of this application, two or more pistons 5 are provided inside the tube body 9, so that adjacent pistons 5 and the tube body 9 form independent liquid storage chambers, forming at least a third liquid storage chamber; by providing two or more pistons 5 to form multiple liquid storage chambers, complex continuous metering pumping is realized.

[0103] Specifically, in one embodiment of this application, a viewing window 102 is provided on the nozzle 1 for observing the position of the tube body 9 or the tube seat 7, for identifying the remaining dose status, and for converting the hidden mechanical stroke into a visible remaining dose.

[0104] Specifically, in one embodiment of this application, the usage process is as follows:

[0105] like Figure 4 Before activation: In the initial position, the reservoir contains the target dose of liquid, and the corresponding mark can be seen through window 102, indicating that the two doses are available.

[0106] Pressing the cap 4 completes the pumping of medication into the first reservoir chamber: Pressing the cap 4 moves the nozzle 1, water core 2, steel needle 3, and retainer 6 towards the tube body 9; the liquid in the first reservoir chamber between the water core 2, piston 5, and tube body 9 is compressed, and the liquid is pumped along the tubing on the steel needle 3 or the water core 2, or the gap between the water core 2 and the steel needle 3, to the outlet of the nozzle 1, completing the atomization or spraying of the first dose of medication. Figure 5 ,

[0107] Limits or scales are set on the outer wall of the starter 10 or the inner wall of the nozzle 1 to limit or control the movement of the nozzle 1 relative to the starter 10, so that it can only pump the first liquid storage chamber.

[0108] The outer wall of the starter 10 is provided with a protrusion, so that the nozzle 1 has a movable space relative to the starter 10 that does not interfere with its movement, thus meeting the required stroke for pumping.

[0109] Alternatively, the internal spaces of the nozzle 1 and the starter 10 can be coordinated to allow the nozzle 1 to move relative to the starter 10 without interference, thus meeting the required stroke for pumping.

[0110] The spring 8's resistance causes the pressing cover 4, nozzle 1, water core 2, steel needle 3, and card holder 6 to return to their initial positions; while the tube body 9, due to negative pressure, or the steel needle 3 piercing the piston 5, causes the piston 5 to drive the tube body 9 to move with the steel needle 3.

[0111] To compensate for insufficient negative pressure or friction between piston 5 and tube 9, or to prevent the steel needle 3 from penetrating piston 5 after the first liquid storage chamber is completed, thus avoiding stroke misalignment, a one-way protrusion and one-way groove are provided between the retainer 6 and tube seat 7. This allows the forward movement of retainer 6 relative to tube seat 7 to be unrestricted, while restricting the reverse movement of retainer 6 relative to tube seat 7. Retainer 6 then drives tube seat 7 to move in the opposite direction.

[0112] The one-way protrusion and one-way groove are positioned at the stroke position after the first liquid storage chamber has been pumped;

[0113] To prevent the pressing cover 4 from being pressed repeatedly ineffectively, one-way protrusions and one-way grooves are also provided for the movement stroke of the card seat 6 and the tube seat 7 at the initial position and the pumping completion position of the second liquid storage chamber.

[0114] By resetting the spring 8, the card holder 6 drives the tube holder 7 and tube body 9 to move, thereby controlling the pressing movement stroke;

[0115] A check valve is installed on the pumping pipeline to ensure that the liquid storage chamber can only be pumped to the outside in one direction.

[0116] Through window 102, you can see tube seat 7 or steel needle 3. Set the observation position or mark accordingly, and identify it as a dose reserve available state.

[0117] Pressing the button again completes the pumping of medication into the second reservoir: the steel needle 3 punctures the second reservoir, the water core 2 contacts the piston 5, squeezing the second reservoir. The liquid is pumped along the tubing on the steel needle 3 to the outlet of the nozzle 1, completing the nebulization or spraying of the second dose. Figure 6 As shown;

[0118] You can see the tube socket 7 or the steel needle 3 through window 102. Set the observation position or mark accordingly, and it will be identified as a state where there is no dose reserve available.

[0119] During the compression of the tube body 9, the tube body 9 is limited and supported by the tube seat 7, and the tube seat 7 is limited and supported by the conical lock 101 of the nozzle 1; after the tube body 9 moves upward, the tube seat 7 is still limited and supported by the conical lock 101 through the cooperation of the check protrusion 701 and the conical lock 101.

[0120] Specifically, in one embodiment of this application, in response to the problems of ambiguous remaining quantity indication, low status differentiation, and inability to adapt to dual-dose metering scenarios of existing dual-dose spray pumps, a dual-dose pump with multi-level remaining quantity indication window is proposed. Through the hierarchical indication structure, clear visual prompts for three states—2 doses remaining, 1 dose remaining, and no remaining dose—are achieved, thereby improving the accuracy of metering and the user experience.

[0121] The dual-dosage pump of the present invention includes a nozzle, a water core, a steel needle, a tube body, a pressing cap, a piston, a retainer, a spring, a tube seat, and a starter component. The pump body is provided with a progress bar-level indicator structure that can dynamically display changes in the piston assembly stroke. Specifically, it includes the following embodiments:

[0122] The pump body has a continuous progress bar indicator on the side wall of the nozzle, and the degree of filling of the progress bar is positively correlated with the amount of remaining agent;

[0123] Remaining 2 doses status: The progress bar has no red fill and only shows the initial status;

[0124] Remaining dose status: The progress bar is half red, displaying the "speed bar half red" status;

[0125] No dose remaining: The progress bar is completely filled with red, displaying the "speed bar is all red" status;

[0126] As the medication is consumed, the piston assembly moves the nozzle downwards, and the red-filled area of ​​the progress bar gradually enters the visible range of the window. Users can intuitively distinguish the different states of the remaining dosage by observing the degree of filling of the progress bar.

[0127] Working principle:

[0128] Each time the dual-dose pump completes a press, the piston assembly moves downward a fixed distance within the pump body, consuming one dose of medication; the indicator structure of this invention precisely matches the stroke of the piston assembly.

[0129] When there are 2 doses of medicine remaining in the pump body, the initial position of the tube seat will place the corresponding "2 doses remaining" indicator (without a red-filled progress bar) in the visible area of ​​the window.

[0130] After one press is completed and one dose of medicine is consumed, the piston assembly moves downward, and the linkage tube seat moves synchronously, so that the corresponding "1 dose remaining" indicator (half-red filled progress bar) enters the window.

[0131] After the second press is completed and all 2 doses of medicine are consumed, the piston assembly reaches the end of its stroke. The corresponding "No more remaining" indicator (a progress bar filled in full red) appears in the window, prompting the user that the medicine has been exhausted and no further effective presses can be completed.

[0132] Compared with the prior art, the present invention has the following advantages:

[0133] 1. Precise differentiation of multi-level status: Through graded indication of orifice position or progress bar, it can clearly distinguish between three statuses: 2 doses remaining, 1 dose remaining, and no dose remaining. This solves the problem that single-level indication cannot be adapted to dual-dose scenarios. Users can accurately determine the number of presses remaining, especially in pharmaceutical scenarios, to ensure the accuracy of the dosing plan.

[0134] 2. Highly visual and intuitive: The red progress bar indicates the change in fill level. Users can quickly read the remaining status through the window without disassembling the pump body. It is easy to operate and suitable for users of all ages.

[0135] 3. High structural adaptability: The stroke of the indicator structure is directly linked to that of the piston assembly, without additional complex transmission components. The structure is simple and reliable, and it is not prone to indication deviation. It is compatible with the existing production process of dual-dose pumps, without the need for major mold modifications, and the production cost is low.

[0136] The dual-dose pump of this embodiment includes a pump body, a nozzle, a piston assembly, and a viewing window. The side wall of the nozzle is provided with a continuous progress bar indicator, and the progress bar is coated with a red coating that changes with the stroke.

[0137] Initial state (2 doses remaining): The red coating on the progress bar is not visible in the viewport, and the user observes a progress bar without red fill.

[0138] After one press (1 dose remaining): Piston assembly 3 moves the nozzle 2 downward, and half of the red coating on the progress bar enters the viewing window 4, allowing the user to observe the progress bar filled with half red.

[0139] After two presses (nothing remaining): Piston assembly 3 reaches the end of its stroke, the entire red coating of the progress bar enters the viewing window, and the user observes a fully filled progress bar, indicating that the potion is depleted; The components involved are described below:

[0140] Nozzle 1: Fixing the overall frame and controlling the atomization pattern:

[0141] Water core 2: assembles with the nozzle to deliver medication and form an atomization; fixed steel needle:

[0142] Steel needle 3: punctures the piston during drug administration to form a complete drug delivery channel.

[0143] Press cap 4: Improves grip, allowing the actuator to be pressed smoothly to administer medication;

[0144] Piston 5: Stores the liquid medicine in a sealed, leak-proof manner;

[0145] Card holder 6: Stabilizes the movement of the tube holder in the direction of the liquid outlet channel, and limits the number of feeds per cycle;

[0146] Tube seat 7: Secures the tube in position, allowing for precise administration in two doses when used with the card holder and initiator;

[0147] Spring 8: The starter resets and stores energy after drug administration, facilitating secondary drug administration.

[0148] Tube 9: Storage of the medicinal solution;

[0149] Activator 10: The start button for the entire device. Pressing it once administers the medication once (total of 2 times).

[0150] The above implementation enables multi-stage margin visualization indication of dual-dose pumps. It has a simple and reliable structure and can be directly applied to the production and manufacturing of existing dual-dose pumps.

[0151] In summary, this invention aims to solve the core technical problems of existing dual- or multi-dose spray pumps in quantitative drug delivery, such as unclear residual volume indication, unreliable metering stroke, and cross-contamination. In existing technical solutions, most pumps lack dynamic residual volume indication, making it difficult for medical personnel or users to accurately determine the medication stage, which can easily lead to misjudgment or empty pumping, resulting in medical risks such as insufficient dosage. At the same time, conventional friction-type shifting structures are easily affected by plastic tolerances, material fatigue, and operating habits, which can easily cause jamming, slippage, or incorrect shifting, and even result in dispensing multiple doses of medication at once. In addition, traditional systems are prone to oxidation and deterioration or cross-contamination after the first dose is administered through the shared flow channel.

[0152] To address this, the present invention employs a component-based hard linkage mechanism to achieve step-by-step drug delivery by setting multiple independent liquid storage chambers and piston isolation structures within the pump body. The remaining dose is precisely indicated by a visually penetrating window on the nozzle in conjunction with the stroke linkage of the piston assembly. Simultaneously, the combination of unidirectional protrusions and grooves effectively avoids stroke deviation and misoperation. This device not only ensures high precision and stability of the drug delivery dose but also completely eliminates cross-contamination between flow channels through physical isolation, providing reliable technical support for the safe and precise delivery of highly active drugs.

[0153] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered as one of the protection scopes of an embodiment.

Claims

1. A non-single-dose pumping method, characterized in that, It includes at least a first pumping position and a second pumping position, which are two independent dose pumping positions, and each pumping position is provided with an independent liquid storage chamber. At the first pumping position, a first liquid storage chamber is formed between the water core (2) and the pipe body (9). The water core (2) moves relative to the pipe body (9) to squeeze the first liquid storage chamber. The liquid in the first liquid storage chamber is squeezed and pumped, and sent into the nozzle (1) along the pumping pipeline. At the second pumping position, the insert pierces the wall of the first liquid storage chamber and enters the second liquid storage chamber. The water core (2) moves relative to the pipe body (9) to squeeze the second liquid storage chamber. The liquid in the second liquid storage chamber is squeezed and pumped, and sent into the nozzle (1) along the pumping pipeline.

2. The non-single-dose pumping method as described in claim 1, characterized in that, The stroke of the water core (2) corresponds to the stroke of the squeezing storage chamber; the insertion part is set at the inlet of the pumping pipeline; an observation window or scale is provided to observe the position of the water core (2) or the tube body (9) and to identify the remaining quantity of unused storage chambers.

3. The non-single-dose pumping method as described in claim 1, characterized in that, The tube body (9) is equipped with a reset component and a one-way limiting component. The moving direction of the water core (2) is positive, and the reset direction of the water core (2) is negative. The reset component causes the water core (2) and the tube (9) to move in the opposite direction, so that the next forward stroke of the water core (2) is not less than the target stroke; The one-way limiting component is used to limit the tube body (9). During the process of the water core (2) squeezing the first liquid storage chamber and the second liquid storage chamber, and piercing the cavity wall of the first liquid storage chamber, the one-way limiting component restricts the movement of the tube body (9) and keeps the tube body (9) stationary. When the water core (2) moves in the opposite direction, the one-way limiting component does not restrict the tube body (9) and allows the tube body (9) to move in the opposite direction along with the water core (2).

4. A non-single-dose pumping device, comprising a nozzle (1), a water core (2), a steel needle (3), a pressing cap (4), and a tube (9), wherein the outlets of the nozzle (1) and the water core (2) are connected, a steel needle (3) is disposed inside the water core (2), the lower end of the steel needle (3) extends out of the water core (2), and the pressing cap (4) is used to drive the nozzle (1), the water core (2), and the steel needle (3) to move toward the tube (9), characterized in that, A piston (5) is installed inside the tube (9). A first liquid storage chamber is formed by sealing the water core (2), the piston (5) and the inlet section of the tube (9). A second liquid storage chamber is separated between the piston (5) and the end section outside the inlet section of the tube (9). After the piston (5) is pressed against by the water core (2), the piston (5) squeezes and pumps the liquid in the second liquid storage chamber.

5. A non-single-dose pumping device as described in claim 4, characterized in that, The lower inlet section of the nozzle (1) is fitted onto the upper inlet section of the starter (10), and is equipped with a spring (8) and a retainer (6). The retainer (6) is used to limit the nozzle (1). The card holder (6) is supported on the inner step of the nozzle (1), one end of the card holder (6) is against the spring (8), and the other end of the bottom of the starter (10) is against the spring (8). The nozzle (1) and the starter (10) are connected by a protrusion, which limits the nozzle (1) to the initial position on the upper part of the starter (10). A sliding pair is formed between the nozzle (1) and the starter (10), and the spring (8) moves the nozzle (1) and the starter (10) back to the initial position.

6. A non-single-dose pumping device as described in claim 5, characterized in that, The card holder (6) and the tube seat (7) are provided with matching one-way protrusions and one-way grooves. The card holder (6) moves from the initial mating position of the tube seat (7) to the end mating position, so that the water core (2) squeezes the liquid storage chamber one by one to complete the pumping of liquid. After the liquid pumping of the first storage chamber is completed, when the card seat (6) is pushed back by the spring (8) and moves in the opposite direction, the cooperation of the one-way protrusion and the one-way groove causes the card seat (6) to drive the tube seat (7) and the tube body (9) to move in the opposite direction.

7. A non-single-dose pumping device as described in claim 6, characterized in that, The inner wall of the card holder (6) is provided with a one-way protrusion, and the side of the one-way protrusion away from the outlet side of the nozzle (1) is provided with an inclined surface. The outer wall of the tube seat (7) is provided with a one-way groove, and the side of the one-way groove away from the outlet side of the nozzle (1) is provided with an inclined surface.

8. A non-single-dose pumping device as described in claim 7, characterized in that, The tube body (9) is inserted into the tube seat (7). The tube body (9) and the tube seat (7) are interference fit, so that the tube seat (7) and the tube body (9) are fixedly set together. The tube seat (7) is used to support and protect the tube body (9). The pipe seat (7) is supported on the starter (10); The outer wall of the tube seat (7) is provided with a check protrusion (701). The lower end of the tube seat (7) extends into the conical lock (101). The bottom of the starter (10) is provided with a conical lock (101). The conical lock (101) limits the check protrusion (701) to prevent reverse movement, so that the tube seat (7) has only the freedom to move in the opposite direction.

9. A non-single-dose pumping device as described in claim 7, characterized in that, A piston (5) is provided on the tube body (9) to isolate the liquid storage chamber; the cavity wall pierced by the piercing part is composed of the piston (5); The piston (5) and the tube body (9) are sealed together; a viewing window (102) is provided on the nozzle (1) for observing the position of the tube body (9) or the tube seat (7) and for identifying the remaining dose status.

10. A non-single-dose pumping device as described in claim 4, characterized in that, The pumping pipeline is located at the center of the steel needle (3), which is a hollow needle; Two or more pistons (5) are provided inside the tube (9) so that adjacent pistons (5) and tube (9) form independent liquid storage chambers, forming at least a third liquid storage chamber.

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