Liquid injector

Abstract

The utility model discloses a liquid injector. The liquid injector comprises a liquid storage shell which is provided with a liquid storage cavity used for storing flavor fluid; the fluid driving mechanism comprises a negative pressure pipe, a negative pressure generating piece and a check valve, the negative pressure pipe is installed in the liquid storage shell, the negative pressure generating piece is connected with the negative pressure pipe, a liquid inlet communicated with the liquid storage cavity is formed in the bottom wall of the negative pressure pipe, and the check valve is installed at the liquid inlet; wherein the negative pressure generating piece is used for forming negative pressure in the negative pressure pipe, and the check valve is opened, so that the flavor fluid in the liquid storage cavity is extracted from the liquid inlet into the negative pressure pipe, and the flavor fluid in the negative pressure pipe is discharged outwards. By means of the mode, the fluid driving mechanism which is simple and efficient in structure is adopted in the liquid injector, and the liquid injector is convenient to miniaturize, suitable for being applied to a small-size liquid storage shell, convenient to carry by a user and also convenient to use by the user to inject liquid into an aerial fog base body.

Description

Technical Field

[0001] This application relates to the field of liquid injection device technology, and in particular to a liquid injection device. Background Technology

[0002] In the field of traditional tobacco products, the flavor characteristics of cigarettes (such as cigarettes and cigars) are mainly determined by their internal components, including the variety and proportion of tobacco raw materials, additives (such as flavorings and humectants), and filter materials. These components are solidified into the cigarette structure through specific processes during production, such as integrating flavorings into the tobacco, filter, or cigarette paper through spraying, soaking, or adding slow-release capsules.

[0003] Consumers cannot enhance the flavor or aroma of traditional tobacco or heated tobacco products when using them, because both traditional and heated tobacco products have their specifications set at the factory. The flavor characteristics of the cigarettes are completely fixed after they leave the factory and do not have any other flavor-enhancing effects. Consumers cannot actively adjust the flavor according to personal preferences or usage scenarios.

[0004] Therefore, a new device is needed to enhance the aroma or flavor of cigarettes during use, and it should also be low-cost, highly portable, and easy to use. Utility Model Content

[0005] This application provides a liquid injector to address the need for a liquid injector for injecting liquid into an aerosol matrix to be low-cost, highly portable, and easy to use.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution: providing a liquid injector. The liquid injector includes: a liquid storage shell having a liquid storage chamber for storing flavor fluid; a fluid driving mechanism including a negative pressure tube, a negative pressure generating element, and a check valve; the negative pressure tube is installed inside the liquid storage shell; the negative pressure generating element is connected to the negative pressure tube; the bottom wall of the negative pressure tube has an inlet communicating with the liquid storage chamber; the check valve is installed at the inlet; and the piston has an outlet channel; wherein, the negative pressure generating element is used to create a negative pressure inside the negative pressure tube; the check valve opens to draw flavor fluid from the liquid storage chamber into the negative pressure tube from the inlet and to discharge flavor fluid from the negative pressure tube.

[0007] In some embodiments, the negative pressure generating element is a piston element, which is movably disposed in the negative pressure tube; the piston element includes a piston disc and a piston rod, one end of the piston rod is fixed to the piston disc, the piston rod is provided with a liquid outlet channel, and the piston disc is clearance-fitted with the inner wall of the negative pressure tube;

[0008] The piston disc divides the space inside the negative pressure tube into a first working chamber and a second working chamber. The first working chamber is connected to the liquid inlet, and the second working chamber is connected to the liquid outlet.

[0009] When the piston disc moves upward, a negative pressure is formed in the first working chamber, the check valve opens, the flavor fluid is drawn from the inlet into the first working chamber, and the flavor fluid in the second working chamber is squeezed out through the outlet channel; when the piston disc moves downward, the check valve closes, driving the flavor fluid in the first working chamber to transfer to the second working chamber.

[0010] In some embodiments, the seal includes a cylindrical sealing portion and a sealing disc disposed within the cylindrical sealing portion. The cylindrical sealing portion is tightly fitted to the inner wall of the negative pressure pipe. The piston rod passes through a through hole on the sealing disc and maintains a dynamic seal with the sealing disc. The second working chamber is located between the sealing disc and the piston disc.

[0011] In some embodiments, the fluid drive mechanism further includes a movable handle and a limiting frame. The limiting frame is embedded in the port of the negative pressure tube. The movable handle is connected to the piston rod and slides in cooperation with the limiting frame. The movable handle is provided with a guide channel communicating with the liquid outlet channel.

[0012] In some embodiments, the fluid drive mechanism further includes an elastic element disposed between the piston and the negative pressure tube, or the elastic element disposed between the limiting frame and the movable handle;

[0013] The syringe also includes a trigger key disposed on the liquid reservoir, the trigger key being connected to the movable handle;

[0014] Wherein, the trigger key is pressed to drive the piston to move downward through the movable handle, and the piston compresses the elastic element when it moves downward; the elastic element is used to drive the piston to move upward after the trigger key is released.

[0015] In some embodiments, the fluid drive mechanism further includes a motor and a transmission element, the transmission element being tractively connected between the motor and the movable handle;

[0016] The syringe also includes a trigger key disposed on the liquid reservoir, the trigger key being electrically connected to the motor;

[0017] When the trigger key is activated, the motor drives the movable handle to slide back and forth along the limiting frame via the transmission component.

[0018] In some embodiments, the check valve is a sealing ball that seals the inlet by its own weight.

[0019] When the negative pressure inside the negative pressure tube reaches the negative pressure threshold, the sealing ball rises, opening the inlet and allowing the flavor fluid to enter the first working chamber; when the negative pressure inside the negative pressure tube falls below the negative pressure threshold, the sealing ball falls back, closing the inlet.

[0020] In some embodiments, the liquid storage shell further has a receiving cavity for receiving the aerosol matrix;

[0021] The injector also includes a spike assembly, which includes a spike needle and an infusion line. The infusion line connects the spike needle and the fluid drive mechanism. The spike needle is connected to the bottom wall of the receiving cavity and is used to pierce the aerosol matrix in the receiving cavity to inject flavor fluid into the aerosol matrix.

[0022] In some embodiments, the length of the needle extending from the bottom wall of the receiving cavity is less than the depth of the receiving cavity.

[0023] In some embodiments, the needle includes an integrally formed connecting portion, a delivery tube portion, and a needle portion arranged sequentially, wherein the connecting portion is connected to one end of the infusion tubing, and the aperture of the needle portion is smaller than the aperture of the delivery tube portion, wherein the aperture of the needle portion is 0.05-1.5mm.

[0024] The beneficial effects of this application are as follows: Unlike the prior art, this application discloses a liquid injector. By setting a fluid driving mechanism in the liquid storage shell, the flavor fluid in the liquid storage chamber is driven to be discharged outward through the negative pressure tube and the liquid outlet channel on the piston. When the piston moves downward, the check valve closes and can transfer the flavor fluid in the negative pressure tube from bottom to top. When the piston moves upward, the check valve opens to draw the flavor fluid in the liquid storage chamber from the liquid inlet into the negative pressure tube and to discharge the flavor fluid in the negative pressure tube through the liquid outlet channel. Therefore, the liquid suction and discharge process can be completed in each reciprocating cycle of the piston, and the amount of flavor fluid discharged in each cycle is fixed, which can reliably and continuously discharge a quantitative amount of liquid. Moreover, the fluid driving mechanism has a simple and efficient structure, is easy to miniaturize, is suitable for application in small-volume liquid storage shells, is easy for users to carry, and is also convenient for users to use to inject liquid into aerosol matrix. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0026] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the injector provided in this application;

[0027] Figure 2 Is it like this? Figure 1 A schematic cross-sectional view showing the separation of the injector from the aerosol matrix.

[0028] Figure 3 This is a cross-sectional view of another embodiment of the injector provided in this application;

[0029] Figure 4 Is it like this? Figure 1 The diagram shows the structure of the spiked needle in the injection device.

[0030] Figure 5 Is it like this? Figure 1 The diagram shows the exploded structure of the injector.

[0031] Figure 6 This is a cross-sectional structural schematic diagram of another embodiment of the injector provided in this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] This application provides a liquid dispenser 100, in conjunction with reference to [the relevant document]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an embodiment of the injector provided in this application. Figure 2 Is it like this? Figure 1 The diagram shows a cross-sectional view of the injector separated from the aerosol matrix.

[0036] The injector 100 includes a reservoir shell 10 and a spike assembly 20. The reservoir shell 10 has a reservoir chamber 101 and a receiving chamber 102 that are separated from each other. The reservoir chamber 101 is used to store flavor fluid, and the receiving chamber 102 is used to receive aerosol matrix 01. The spike assembly 20 includes a spike needle 21 and an infusion line 22. The infusion line 22 connects the reservoir chamber 101 and the spike needle 21. The spike needle 21 is connected to the bottom wall of the receiving chamber 102 and is used to pierce the aerosol matrix 01 in the receiving chamber 102 to inject flavor fluid into the aerosol matrix 01.

[0037] The flavor fluid can be a variety of spice or flavoring liquids, and can have fruit, herbal, coffee, or other flavors, aiming to provide users with a rich sensory experience. The aerosol matrix 01 can be a product such as tobacco leaves or cigarettes, which can form an aerosol for users to inhale after being heated; the flavor fluid can be injected into the filter tip of the aerosol matrix 01 through the needle 21, so that when the user inhales, the aerosol produced by the aerosol matrix 01 can be superimposed with the flavor fluid through the filter tip, forming a richer and more complex taste.

[0038] The size and shape of the receiving cavity 102 are adapted to the aerosol substrate 01, so that the aerosol substrate 01 can be placed stably and ensure that it does not shift during the liquid injection process; when the aerosol substrate 01 is inserted into the receiving cavity 102, the sharp needle 21 is also inserted into the filter part of the aerosol substrate 01 at the same time, ensuring that the flavor fluid is evenly distributed and improving the taste; or, after the aerosol substrate 01 is inserted into the receiving cavity 102, the sharp needle 21 moves and inserts into the filter part of the aerosol substrate 01.

[0039] like Figures 1-2 As shown, the aerosol matrix 01 is inserted into the receiving cavity 102 and then separates from the receiving cavity 102.

[0040] See Figure 1The syringe 100 can be cylindrical in shape, having two ends and a peripheral wall 105 connecting the two ends. The two ends are a top end 104 and a bottom end 106, respectively. The top end 104 may be provided with a receiving cavity 102. The opening of the receiving cavity 102 for receiving the aerosol matrix 01 is located at the top end 104, which facilitates the user to insert the aerosol matrix 01 from top to bottom, improving the user's convenience. Or refer to Figure 3 The receiving cavity 102 is disposed on the peripheral wall 105 of the liquid storage shell 10, and the opening of the receiving cavity 102 is located on the peripheral wall 105, which makes it convenient for the user to insert the aerosol matrix 01 from the side, thus improving the ease of operation; or, the receiving cavity 102 is disposed on the bottom end 106 of the liquid storage shell 10, and the opening of the receiving cavity 102 is located on the bottom end 106, with the liquid storage cavity 101 located above the receiving cavity 102. Therefore, when the liquid storage cavity 101 supplies flavor fluid to the needle 21, gravity can make the flavor fluid flow more smoothly through the infusion line 22 and the needle 21 into the aerosol matrix 01, which is beneficial to improving the injection efficiency.

[0041] like Figure 2 As shown, the length of the needle 21 extending from the bottom wall of the receiving cavity 102 is less than the depth of the receiving cavity 102, that is, the tip of the needle 21 does not exceed the opening of the receiving cavity 102, thereby avoiding potential injury risks to the user when carrying it.

[0042] In this embodiment, the piercing needle 21 is fixed to the bottom wall of the receiving cavity 102. When the user inserts the aerosol matrix 01 into the receiving cavity 102, the piercing needle 21 simultaneously pierces into the aerosol matrix 01, ensuring that the flavor fluid is accurately injected into the preset position of the aerosol matrix 01.

[0043] By directly fixing the spiked needle 21 to the receiving cavity 102, the installation structure of the spiked needle 21 is simplified, the production cost is reduced, and the stability of the injection process is improved.

[0044] Optionally, the needle 21 is movably disposed within the receiving cavity 102. The injector 100 also includes a drive (not shown) connected to the needle 21 and used to drive the needle 21 to move. When the aerosol matrix 01 is present in the receiving cavity 102, the drive can drive the needle 21 to pierce the aerosol matrix 01 to inject flavor fluid into the aerosol matrix 01.

[0045] The driving component can be a micro drive motor or a micro cylinder, which can control the movement of the spike needle 21. The control signal can be triggered by the user through a manual button or by a sensor. The sensor can be an infrared sensor or a photoelectric sensor, which can detect the presence of the aerosol matrix 01 in the accommodating cavity 102.

[0046] Please see Figure 2 and Figure 4 ,inFigure 4 Is it like this? Figure 1 The diagram shows the structure of the spiked needle in the injection device.

[0047] In this embodiment, the spiked needle 21 includes a connecting part 211, a liquid delivery tube part 212 and a spike part 213 arranged in sequence in an integral structure. The connecting part 211 is connected to one end of the infusion tube 22. The aperture of the spike part 213 is smaller than the aperture of the liquid delivery tube part 212. The aperture of the spike part 213 is 0.05-1.5mm.

[0048] The connecting part 211 is also fixedly connected to the bottom wall of the receiving cavity 102 to ensure that the spike needle 21 is stable and not easy to fall off; the liquid delivery tube part 212 and the spike part 213 are both made of hard material to facilitate piercing into the aerosol matrix 01. The end of the spike part 213 is designed with a bevel to enhance its penetration power.

[0049] The aperture of the spike portion 213 is smaller than that of the liquid delivery tube portion 212. The flavor fluid flows from the larger aperture into the smaller aperture, resulting in a higher flow velocity within the spike portion 213. This increases the pressure of the injected aerosol matrix 01, ensuring uniform distribution of the flavor fluid and enhancing the aerosol's flavor. Simultaneously, the small aperture design at the spike portion 213 effectively prevents backflow of the flavor fluid, ensuring the stability of the injection process.

[0050] The aperture of the spike 213 is 0.05-1.5mm, specifically 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm or 1.5mm, to ensure that the flavor fluid is rapidly injected into the aerosol matrix 01 under suitable pressure. This design takes into account both injection efficiency and injection accuracy, and can efficiently deliver a quantitative amount of flavor fluid to the aerosol matrix 01, ensuring that the amount injected each time is accurate and avoiding the impact on the consistency of the aerosol taste due to too much or too little injection.

[0051] If the orifice diameter of the spike portion 213 is less than 0.05 mm, it may lead to excessive injection resistance, affecting the injection speed; if it is greater than 1.5 mm, it may cause uneven injection of flavor fluid, affecting the aerosol's taste, and the injection volume is also difficult to control precisely. Therefore, setting the orifice diameter of the spike portion 213 to 0.05-1.5 mm ensures both injection efficiency and uniform distribution and precise control of the flavor fluid, improving the consistency of the injector 100's performance and facilitating the application of aerosols to a consistent quality with the aerosol substrate 01.

[0052] The infusion line 22 is a flexible tube, which is easy to lay out inside the liquid storage shell 10 and can save layout space. It is also not easy to break during the assembly process.

[0053] The infusion tubing 22 can also be a rigid tube; this application does not impose specific restrictions on this.

[0054] Optionally, the portion of the liquid storage shell 10 corresponding to the liquid storage cavity 101 can be soft, so that by pressing the soft portion, the flavor fluid inside can be caused to flow out and be injected into the aerosol matrix 01 through the infusion line 22 and the needle 21. The amount of flavor fluid injected into the aerosol matrix 01 can be controlled by pressing.

[0055] Optionally, the portion of the liquid storage shell 10 that constitutes the liquid storage cavity 101 may include a cylinder and a piston movably disposed within the cylinder. The volume of the liquid storage cavity 101 is defined by the piston and the cylinder, thereby adjusting the injection amount of flavor fluid into the aerosol matrix 01 by pushing the piston.

[0056] In this implementation, such as Figure 1 As shown, the syringe 100 also includes a trigger key 12 and a fluid drive mechanism 30. The trigger key 12 is disposed on the liquid storage shell 10 and connected to the fluid drive mechanism 30. The fluid drive mechanism 30 is disposed inside the liquid storage shell 10 and connected to the infusion line 22. When the trigger key 12 is triggered, the fluid drive mechanism 22 delivers the flavor fluid in the liquid storage chamber 101 to the needle 21 through the infusion line 22.

[0057] In other words, the user can trigger the trigger key 12 by pressing or touching it. The trigger key 12 is linked to the fluid drive mechanism 30, which provides power to drive the flavor fluid in the liquid storage chamber 101 through the infusion line 22 and through the needle 21 to be precisely injected into the aerosol matrix 01.

[0058] The fluid drive mechanism 30 can precisely control and ensure that the amount of liquid injected into the aerosol matrix 01 is consistent each time, avoiding differences in aerosol taste caused by fluctuations in the amount of liquid injected and improving product consistency. At the same time, this design also simplifies the operation process, allowing users to achieve efficient and accurate liquid injection without complicated operations, further enhancing the practicality and convenience of the injector 100.

[0059] Optionally, the fluid drive mechanism 30 includes a micro pump (not shown) mounted on the infusion line 22. The trigger button 12 can be a mechanical button or a touch button, and is electrically connected to the micro pump. The micro pump can control the start and stop of the micro pump through a trigger signal. The micro pump can inject a quantitative amount of flavor fluid into the aerosol matrix 01 each time. The amount injected each time can be set according to user needs. For example, the injection volume of different levels can be adjusted based on the number of presses. Each level corresponds to a specific injection volume, thereby achieving precise management of the injection volume and meeting the diverse needs of users. The injection volume of each level remains consistent, which can further improve the consistency and stability of the aerosol taste. When using the aerosol, users only need to lightly touch the trigger button 12 to easily achieve precise injection, making the operation simple and efficient.

[0060] In this embodiment, as Figure 1 As shown, the fluid drive mechanism 30 includes a negative pressure pipe 31, a negative pressure generator 32, and a check valve 33. The negative pressure generator 32 is connected to the negative pressure pipe 31. The bottom wall of the negative pressure pipe 31 is provided with an inlet 310 that communicates with the liquid storage chamber 101. The check valve 33 is installed at the inlet 310. The infusion pipeline 22 is connected to the negative pressure generator 32. The negative pressure generator 32 is used to create a negative pressure in the negative pressure pipe 31. The check valve 33 is opened to draw the flavor fluid in the liquid storage chamber 101 from the inlet 310 into the negative pressure pipe 31 and to push the flavor fluid in the negative pressure pipe 31 into the infusion pipeline 22.

[0061] In this embodiment, the negative pressure generating element 32 is a piston element 32, which is movably disposed in the negative pressure tube 31. The piston element 32 generates negative pressure by moving in the negative pressure tube 31.

[0062] In other embodiments, the negative pressure generator 32 may be a micro pump that can create a negative pressure in the negative pressure tube 31 during operation, so as to draw the flavor fluid in the storage chamber 101 into the negative pressure tube 31, and can also push the flavor fluid in the negative pressure tube 31 to the infusion line 22.

[0063] See also Figure 1 and Figure 5 , Figure 5 Is it like this? Figure 1 The diagram shows the exploded structure of the injector.

[0064] The liquid storage shell 10 may include an upper shell 11 and a lower shell 13, which may be snapped together, threaded together, or connected by fasteners. The upper shell 11 is provided with a receiving cavity 102, and the lower shell 13 is provided with a liquid storage cavity 101. After the two are connected, an installation cavity 103 is also formed in the upper shell 11. The installation cavity 103 is used to accommodate the fluid drive mechanism 30 and the liquid delivery pipeline 22, etc. The lower shell 13 is provided with a partition 131 that covers the liquid storage cavity 101. The negative pressure pipe 31 is connected to the partition 131 and extends into the liquid storage cavity 101.

[0065] The inlet 310 of the negative pressure tube 31 connects to the storage chamber 101, ensuring smooth extraction of the flavor fluid. Furthermore, the fluid drive mechanism 30 also includes a suction tube 301 connected to the inlet 310. The suction tube 301 is located within the storage chamber 101 and may contain a filter screen to effectively prevent impurities from entering the negative pressure chamber of the negative pressure tube 31, ensuring the purity of the flavor fluid. The suction tube 301 can be made of soft silicone, which is easy to bend and adapts to extraction needs at different angles; alternatively, the suction tube 301 can be made of metal, as metal is more stable and has a lower probability of ions or molecules incorporating into the flavor fluid, thus reducing flavor contamination. The length of the suction tube 301 is optimized based on the depth of the storage chamber 101 and the installation position of the negative pressure tube 31 to maximize suction efficiency and ensure sufficient extraction of the flavor fluid from the storage chamber, avoiding residue.

[0066] The negative pressure tube 31 has a tubular structure with a smooth inner wall, which ensures that the piston 32 can move smoothly inside it and reduces frictional resistance, thereby improving the injection efficiency. The check valve 33 is designed to allow the flavor fluid to enter the negative pressure tube 31 from the storage chamber 101 through the inlet 310, but does not allow the flavor fluid to flow back to the storage chamber 101 through the inlet 310, thereby ensuring the unidirectionality and stability of the injection process and further improving the injection accuracy and reliability.

[0067] See also Figure 1 , Figure 2 and Figure 5 The piston 32 can slide back and forth within the negative pressure tube 31, and its sliding stroke is precisely controlled to ensure that the amount of flavor fluid drawn and pushed out each time is consistent, thus improving the overall injection accuracy. The connection between the negative pressure tube 31 and the piston 32 achieves dynamic sealing with good sealing performance, preventing flavor fluid leakage.

[0068] The piston disc 322 on the piston component 32 can be clearance-fitted with the inner wall of the negative pressure tube 31, or the piston disc 322 can be provided with micropores so that the flavor fluid in the negative pressure tube 31 can be transferred from the space under the piston disc 322 to the space above the piston disc 322.

[0069] Specifically, when the piston disc 322 moves in the negative pressure tube 31, the size of the space on both sides of it changes dynamically, thereby achieving precise extraction and delivery of flavor fluid and ensuring the continuity and stability of the injection process. When the piston 32 moves downward, the check valve 33 is in a closed state at the inlet 310. The space below the piston disc 322 gradually decreases, while the space above the piston disc 322 gradually increases, creating a pressure difference that causes the flavor fluid to move upward. The flavor fluid can be transferred upward through the gap between the piston disc 322 and the inner wall of the negative pressure pipe 31 or through the micropores on the piston disc 322. Subsequently, when the piston disc 322 moves upward, a negative pressure is formed in the space below the piston disc 322. When the negative pressure reaches a certain value, the pressure difference on both sides of the check valve 33 will cause the check valve 33 to open automatically, thus releasing the seal on the inlet 310. The flavor fluid in the storage chamber 101 is drawn into the negative pressure pipe 31. At the same time, the upward movement of the piston disc 322 will also push the flavor fluid in the space above the piston disc 322 through the outlet channel 320 to the delivery pipeline 22 to inject liquid into the aerosol matrix 01, thereby completing one injection cycle. Once the pressure difference across the check valve 33 is balanced, the check valve 33 will automatically close, ensuring the unidirectionality and stability of the injection process.

[0070] The stroke of the piston 32 within the negative pressure tube 31 is fixed, thus allowing precise control of the injection volume each time, ensuring that the amount of flavor fluid injected into the aerosol matrix 01 is consistent each time.

[0071] When using it for the first time, there is no flavor fluid in the negative pressure tube 31. A pre-filling operation is required to introduce the flavor fluid from the storage chamber 101 into the negative pressure tube 31. During pre-filling, the piston 32 is manually or automatically controlled to reciprocate until a certain amount of flavor fluid is filled into the negative pressure tube 31.

[0072] Specifically, such as Figure 2 and Figure 5 As shown, the piston component 32 includes a piston disc 322 and a piston rod 324. One end of the piston rod 324 is fixed to the piston disc 322, and the other end of the piston rod 324 is connected to the infusion pipeline 22. The piston rod 324 has an outlet channel 320 inside. The piston disc 322 is clearance-fitted with the inner wall of the negative pressure pipe 31. The piston disc 322 divides the space inside the negative pressure pipe 31 into a first working chamber 311 and a second working chamber 312. The first working chamber 311 is connected to the inlet 310, and the second working chamber... 312 connects to the liquid outlet channel 320; wherein, when the piston disc 322 moves upward, a negative pressure is formed in the first working chamber 311, the check valve 33 opens, the flavor fluid is drawn from the liquid inlet 310 to the first working chamber 311, and the flavor fluid in the second working chamber 312 is squeezed to be pushed to the infusion pipeline 22 through the liquid outlet channel 320; when the piston disc 322 moves downward, the check valve 33 is in the closed state, driving the flavor fluid in the first working chamber 311 to transfer to the second working chamber 312.

[0073] The piston rod 324 is a hollow tube structure with an internal channel for liquid outlet 320. The pipe wall of the piston tube 324 is provided with a side hole near the piston disc 322, which connects the liquid outlet channel 320 and the second working chamber 312.

[0074] The top of the negative pressure tube 31 may be provided with a cover plate, and the piston rod 324 may pass through the cover plate and dynamically seal with the cover plate. The cover plate design ensures good sealing when the piston rod 324 moves, preventing the leakage of flavor fluid.

[0075] In this embodiment, as Figure 2 and Figure 5 As shown, the fluid drive mechanism 30 is also provided with a seal 34 in the negative pressure pipe 31, the piston rod 324 passes through the seal 34 and maintains a dynamic seal with the seal 34, and the second working chamber 312 is located between the seal 34 and the piston disc 322.

[0076] The sealing element 34 is also sealed to the inner wall of the negative pressure tube 31, and dynamically sealed to the outer wall of the piston rod 324. This ensures that the flavor fluid will not leak from between the sealing element 34 and the negative pressure tube 31 or between the sealing element 34 and the piston rod 324 during the reciprocating motion of the piston rod 324, further improving the sealing performance and stability of the injector 100.

[0077] The sealing element 34 includes a cylindrical sealing part 341 and a sealing disc 342 disposed within the cylindrical sealing part 341. The cylindrical sealing part 341 is tightly fitted to the inner wall of the negative pressure pipe 31. The piston rod 324 passes through the through hole on the sealing disc 342, and the sealing disc 342 presses tightly against the outer wall of the piston rod 324 to maintain a dynamic seal with the piston rod 324. The second working chamber 312 is located between the sealing disc 342 and the piston disc 322 to ensure a double sealing effect.

[0078] The cylindrical sealing part 341 has a cylindrical structure and fits tightly against the inner wall of the negative pressure pipe 31. The sealing disc 342 is made of elastic sealing material, so that it can form a dynamic seal with the piston rod 324. Alternatively, a sealing ring or annular sealing lip is installed at the through hole of the sealing disc 342 to achieve a dynamic seal with the piston rod 324 through the sealing ring or annular sealing lip.

[0079] Furthermore, the fluid drive mechanism 30 also includes a movable handle 35 and a limiting frame 36. The limiting frame 36 is embedded in the opening of the negative pressure pipe 31. The movable handle 35 is connected to the piston rod 324 and slides in cooperation with the limiting frame 36. The movable handle 35 is provided with a guide channel 350 that communicates with the liquid outlet channel 320.

[0080] The relative installation position between the limiting bracket 36 and the negative pressure tube 31 is adjustable to limit the stroke of the piston 32, ensuring that the piston rod 324 is stable and precise in reciprocating motion, thereby achieving quantitative liquid injection. The inner wall surface of the limiting bracket 36 is precision machined to achieve a good and precise sliding fit with the movable handle 35, which can reduce frictional resistance, improve motion efficiency, and reduce motion deviation, thus achieving more accurate quantitative liquid injection.

[0081] One end of the piston rod 324 is inserted into and fixed in the movable handle 35. One end of the infusion line 22 is connected to the movable handle 35 and connected to the flow channel 350 on it. The movable handle 35 can carry the piston rod 324 to move smoothly in the negative pressure tube 31 to ensure that the infusion process is accurate.

[0082] The top of the movable handle 35 may also be provided with an extended baffle, which can facilitate the acceptance of power drive, so that the movable handle 35 drives the piston rod 324 to move together.

[0083] The cooperation between the movable handle 35 and the limiting bracket 36 can also make up for the difference between the size of the piston rod 324 and the size of the negative pressure tube 31. Directly driving the piston rod 324 may also lead to unstable and inconvenient movement. Therefore, the movable handle 35 can also increase the ease of driving and stability.

[0084] In this embodiment, the check valve 32 is a sealing ball, which seals the inlet 310 under its own weight; when the negative pressure in the negative pressure pipe 31 reaches the negative pressure threshold, the sealing ball rises, causing the inlet 310 to open and the flavor fluid to enter the first working chamber 311; when the negative pressure in the negative pressure pipe 31 is lower than the negative pressure threshold, the sealing ball falls back, causing the inlet 310 to close.

[0085] The sealing ball has a simple structure and low cost. Under the action of gravity, it can effectively prevent fluid backflow and ensure the stability and consistency of the injection process.

[0086] Alternatively, the check valve 32 can also be a butterfly check valve or a ball check valve, etc., and this application does not impose specific restrictions on it.

[0087] In this embodiment, the fluid drive mechanism 30 further includes an elastic element 37, which is disposed between the piston 32 and the negative pressure tube 31. The trigger key 12 is connected to the piston 32. The trigger key 12 is pressed to drive the piston 32 to move downward, and the piston 32 compresses the elastic element 37 when it moves downward. The elastic element 37 is used to drive the piston 32 to move upward after the trigger key 12 is released from pressing.

[0088] The elastic element 37 can be a compression spring. When the compression spring is used as the elastic element 37, it can provide a stable elastic force, allowing the piston 32 to move smoothly when the trigger key 12 is pressed and released. The compression spring is relatively inexpensive, easy to procure and replace, which helps to reduce the overall manufacturing and maintenance costs of the injector 100. At the same time, the elastic force of the compression spring can be adjusted according to actual needs to adapt to different injection pressures and injection volumes, improving the applicability and flexibility of the injector 100.

[0089] Alternatively, the elastic element 37 may also be a rubber elastic sleeve or a disc spring, etc., and this application does not impose specific restrictions on it.

[0090] The elastic element 37 can be disposed between the piston disc 32 and the bottom wall of the negative pressure tube 31, or the elastic element 37 can be disposed between the limit frame 36 and the baffle of the movable handle 35, and the elastic element 37 can be compressed when moving downward.

[0091] The trigger key 12 can be specifically connected to the baffle of the movable handle 35. By pressing the trigger key 12, the movable handle 35 drives the piston rod 324 to move down and compress the elastic element 37. After releasing the trigger key 12, the elastic element 37 restores its deformation and pushes the piston rod 324 and the trigger key 12 to reset, ensuring the continuity and accuracy of the injection operation.

[0092] See Figure 6 , Figure 6 This is a cross-sectional structural schematic diagram of another embodiment of the injector provided in this application.

[0093] In other embodiments, the movement of the piston 32 can also be controlled electrically. For example, the fluid drive mechanism 30 further includes a motor 39 and a transmission member 38, the transmission member 38 being drively connected between the motor 39 and the piston 32, and the trigger key 12 being electrically connected to the motor 39; when the trigger key 12 is triggered, the motor 39 drives the piston 32 to move up and down through the transmission member 37.

[0094] For example, the transmission component 38 can be connected to the movable handle 35 to indirectly drive the piston component 32 to move.

[0095] The transmission component 38 can be a belt mechanism or a worm gear transmission mechanism to efficiently convert the rotational power of the motor 39 into the linear motion of the piston 32, ensuring a smooth and precise injection process.

[0096] Compared to manual methods, electric methods are easier to operate and provide more stable power output, further improving injection accuracy and efficiency.

[0097] Unlike existing technologies, this application discloses a liquid injector. By incorporating a fluid drive mechanism within the liquid reservoir, the flavor fluid within the reservoir is driven to exit through a negative pressure tube and a liquid outlet channel on the piston. When the piston moves downward, the check valve closes, allowing the flavor fluid in the negative pressure tube to be transferred upward. When the piston moves upward, the check valve opens, drawing flavor fluid from the reservoir into the negative pressure tube from the inlet and discharging it through the liquid outlet channel. Thus, the suction and discharge processes are completed in each reciprocating cycle of the piston, and the amount of flavor fluid discharged in each cycle is fixed, ensuring reliable and continuous quantitative discharge. Furthermore, the fluid drive mechanism is simple, efficient, and easily miniaturized, making it suitable for use in small-volume reservoirs, easy for users to carry, and convenient for users to use for injecting liquid into aerosol substrates.

[0098] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A liquid injector, characterized in that, include: A liquid storage shell having a liquid storage cavity for storing flavor fluid; A fluid drive mechanism includes a negative pressure pipe, a negative pressure generator, and a check valve. The negative pressure pipe is installed inside the liquid storage tank, the negative pressure generator is connected to the negative pressure pipe, the bottom wall of the negative pressure pipe is provided with an inlet communicating with the liquid storage chamber, and the check valve is installed at the inlet. The negative pressure generating element is used to create negative pressure in the negative pressure tube, and the check valve is opened to draw the flavor fluid in the storage chamber from the liquid inlet into the negative pressure tube and to discharge the flavor fluid in the negative pressure tube outward.

2. The injector according to claim 1, characterized in that, The negative pressure generating component is a piston component, which is movably disposed in the negative pressure tube; the piston component includes a piston disc and a piston rod, one end of the piston rod is fixed to the piston disc, the piston rod is provided with a liquid outlet channel, and the piston disc is clearance-fitted with the inner wall of the negative pressure tube; The piston disc divides the space inside the negative pressure tube into a first working chamber and a second working chamber. The first working chamber is connected to the liquid inlet, and the second working chamber is connected to the liquid outlet. When the piston disc moves upward, a negative pressure is formed in the first working chamber, the check valve opens, the flavor fluid is drawn from the inlet into the first working chamber, and the flavor fluid in the second working chamber is squeezed out through the outlet channel. When the piston disc moves downward, the check valve closes, causing the flavor fluid in the first working chamber to transfer to the second working chamber.

3. The injector according to claim 2, characterized in that, The fluid drive mechanism also includes a sealing element disposed within the negative pressure pipe. The sealing element includes a cylindrical sealing part and a sealing disc disposed within the cylindrical sealing part. The cylindrical sealing part is tightly fitted to the inner wall of the negative pressure pipe. The piston rod passes through a through hole on the sealing disc. The piston rod and the sealing disc maintain a dynamic seal. The second working chamber is located between the sealing disc and the piston disc.

4. The injector according to claim 2, characterized in that, The fluid drive mechanism also includes a movable handle and a limiting frame. The limiting frame is embedded in the opening of the negative pressure pipe. The movable handle is connected to the piston rod and slides in cooperation with the limiting frame. The movable handle is provided with a guide channel that communicates with the liquid outlet channel.

5. The injector according to claim 4, characterized in that, The fluid drive mechanism further includes an elastic element, which is disposed between the piston and the negative pressure tube, or between the limiting frame and the movable handle; The injector also includes a trigger key disposed on the liquid storage shell, the trigger key being connected to the movable handle; Wherein, the trigger key is pressed to drive the piston to move downward through the movable handle, and the piston compresses the elastic element when it moves downward; the elastic element is used to drive the piston to move upward after the trigger key is released.

6. The injector according to claim 4, characterized in that, The fluid drive mechanism further includes a motor and a transmission component, wherein the transmission component is throttlely connected between the motor and the movable handle; The injector also includes a trigger key disposed on the liquid storage shell, the trigger key being electrically connected to the motor; When the trigger key is activated, the motor drives the movable handle to slide back and forth along the limiting frame via the transmission component.

7. The injector according to claim 2, characterized in that, The check valve is a sealing ball, which seals the inlet port due to its own weight. When the negative pressure inside the negative pressure tube reaches the negative pressure threshold, the sealing ball rises, opening the inlet and allowing the flavor fluid to enter the first working chamber; when the negative pressure inside the negative pressure tube falls below the negative pressure threshold, the sealing ball falls back, closing the inlet.

8. The injector according to claim 1, characterized in that, The liquid storage shell also has a receiving cavity for containing the aerosol matrix; The injector also includes a spike assembly, which includes a spike needle and an infusion line. The infusion line connects the spike needle and the fluid drive mechanism. The spike needle is connected to the bottom wall of the receiving cavity and is used to pierce the aerosol matrix in the receiving cavity to inject flavor fluid into the aerosol matrix.

9. The injector according to claim 8, characterized in that, The length of the spiked needle extending from the bottom wall of the receiving cavity is less than the depth of the receiving cavity.

10. The injector according to claim 8, characterized in that, The needle includes a connecting part, a liquid delivery tube part and a needle part arranged in sequence in an integral structure, wherein the connecting part is connected to one end of the infusion tube, and the aperture of the needle part is smaller than the aperture of the liquid delivery tube part, and the aperture of the needle part is 0.05-1.5mm.

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