Liquid injector

Abstract

The invention 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 piston piece and a check valve, the negative pressure pipe is installed in the liquid storage shell, the piston piece is movably arranged in the negative pressure pipe, a liquid inlet communicated with the liquid storage cavity is formed in the bottom wall of the negative pressure pipe, the check valve is installed at the liquid inlet, and a liquid outlet channel is formed in the piston piece; when the piston piece moves upwards, negative pressure is formed in the negative pressure pipe, the check valve is opened, 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 through the liquid outlet channel. 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] The present application relates to the technical field of liquid injection devices, and in particular to a liquid injection device. Background Art

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

[0003] When consumers use traditional tobacco or heat-not-burn cigarettes, they cannot increase the flavor or enhance the aroma of the cigarettes they are using, because the specifications of traditional cigarettes and heat-not-burn cigarettes are set when they leave the factory. The flavor characteristics of the cigarettes are completely fixed after leaving the factory, and they do not have any other flavor-enhancing effects. Consumers cannot actively adjust the flavor according to personal preferences or usage scenarios.

[0004] Therefore, it is necessary to propose a new device that can enhance the aroma or taste of the cigarette during use, and the device should also have the characteristics of low cost, high portability and ease of use. Summary of the Invention

[0005] The present application mainly provides a liquid injector to solve the problem that the liquid injector for injecting liquid into an aerosol base must have low cost, high portability and ease of use.

[0006] To solve the above-mentioned technical problems, the present application adopts a technical solution: providing a liquid injector. The liquid injector comprises: a liquid storage housing having a liquid storage chamber for storing a flavored fluid; a fluid drive mechanism comprising a negative pressure tube, a piston, and a check valve. The negative pressure tube is mounted within the liquid storage housing; the piston is movably disposed within the negative pressure tube; a liquid inlet is provided on the bottom wall of the negative pressure tube for communicating with the liquid storage chamber; the check valve is mounted at the liquid inlet; and the piston is provided with a liquid outlet passage. When the piston moves upward, negative pressure is generated within the negative pressure tube, and the check valve opens to draw the flavored fluid within the liquid storage chamber from the liquid inlet into the negative pressure tube and discharge the flavored fluid within the negative pressure tube through the liquid outlet passage.

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

[0008] The piston disc divides the space in 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 channel;

[0009] When the piston disc moves upward, negative pressure is formed in the first working chamber, the check valve opens, the flavor fluid is drawn from the liquid inlet into the first working chamber, and the flavor fluid in the second working chamber is squeezed to be discharged through the liquid 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 fluid drive mechanism is further provided in a seal inside the negative pressure tube, the piston rod passes through the seal and maintains a dynamic seal with the seal, and the second working chamber is located between the seal and the piston disc.

[0011] In some embodiments, the fluid drive mechanism also includes a movable handle and a limit frame, the limit frame is embedded in the pipe mouth of the negative pressure tube, the movable handle is connected to the piston rod and slides with the limit frame, and a guide channel connected to the liquid outlet channel is provided in the movable handle.

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

[0013] The syringe further comprises a trigger key provided on the liquid storage shell, wherein the trigger key is connected to the movable handle;

[0014] The trigger button is pressed to drive the piston to move downward through the movable handle, and the piston compresses the elastic member when moving downward; the elastic member is used to drive the piston to move upward after the trigger button is released.

[0015] In some embodiments, the fluid drive mechanism further comprises a motor and a transmission member, wherein the transmission member is transmission-connected between the motor and the movable handle;

[0016] The syringe further comprises a trigger button provided on the liquid storage housing, wherein the trigger button is electrically connected to the motor;

[0017] When the trigger button is triggered, the motor drives the movable handle to slide back and forth along the limiting frame through the transmission member.

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

[0019] When the negative pressure in the negative pressure tube reaches a negative pressure threshold, the sealing ball rises, causing the liquid inlet to open and the flavor fluid to enter the first working chamber; when the negative pressure in the negative pressure tube is lower than the negative pressure threshold, the sealing ball falls back, causing the liquid inlet to close.

[0020] In some embodiments, the liquid storage housing further comprises a receiving cavity, and the receiving cavity is used to receive the aerosol matrix;

[0021] The injector also includes a spike assembly, which includes a spike needle and an infusion pipeline. The infusion pipeline connects the spike needle and the liquid outlet channel of the piston member. The spike needle is connected to the bottom wall of the accommodating cavity and is used to pierce the aerosol matrix in the accommodating cavity to inject flavor fluid into the aerosol matrix.

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

[0023] In some embodiments, the spike needle includes an integral structure and a connecting portion, a liquid delivery tube portion, and a spike portion arranged in sequence, wherein the connecting portion is connected to one end of the infusion pipeline, the aperture of the spike portion is smaller than the aperture of the liquid delivery tube portion, and the aperture of the spike portion is 0.05-1.5 mm.

[0024] The present application has the beneficial effect of, unlike the prior art, disclosing a liquid injector. The present application provides a liquid injector having a fluid drive mechanism disposed within a liquid reservoir housing to drive the flavored fluid within the liquid reservoir chamber to be discharged outwardly through a negative pressure tube and a liquid outlet passage on a piston member. When the piston member moves downward, a check valve closes and transfers the flavored fluid within the negative pressure tube from bottom to top. When the piston member moves upward, the check valve opens, drawing the flavored fluid from the liquid reservoir chamber from the liquid inlet into the negative pressure tube and discharging the flavored fluid within the negative pressure tube through the liquid outlet passage. Thus, the liquid aspiration and discharge processes are completed during each reciprocating stroke of the piston member. The amount of flavored fluid discharged during each cycle is constant, enabling reliable and continuous quantitative discharge. Furthermore, the fluid drive mechanism has a simple and efficient structure, is easily miniaturized, and is suitable for use in small liquid reservoir housings, making it easy for users to carry and use for injecting liquid into an aerosol base. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0026] Figure 1This is a schematic cross-sectional view of an embodiment of the liquid injector provided by the present application;

[0027] Figure 2 Yes Figure 1 A schematic cross-sectional view of the structure in which the liquid injector and the aerosol base are separated;

[0028] Figure 3 is a schematic cross-sectional view of another embodiment of the liquid injector provided by the present application;

[0029] Figure 4 Yes Figure 1 A schematic diagram of the structure of the sharp needle in the injection device shown;

[0030] Figure 5 Yes Figure 1 Schematic diagram of the explosion structure of the liquid injector shown;

[0031] Figure 6 This is a schematic cross-sectional structural diagram of another embodiment of the liquid injector provided in the present application. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

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

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

[0035] The present application provides a liquid injector 100, Figure 1 and Figure 2 , Figure 1 This is a structural diagram of an embodiment of the liquid injector provided by this application. Figure 2 Yes Figure 1 The cross-sectional structural diagram of the liquid injector and the aerosol base is shown as being separated.

[0036] The injector 100 includes a liquid storage shell 10 and a spike assembly 20. The liquid storage shell 10 has a liquid storage chamber 101 and a receiving chamber 102 that are separated from each other. The liquid storage chamber 101 is used to store flavor fluid, and the receiving chamber 102 is used to receive an aerosol base 01. The spike assembly 20 includes a spike needle 21 and an infusion pipeline 22. The infusion pipeline 22 connects the liquid storage 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 base 01 in the receiving chamber 102 to inject the flavor fluid into the aerosol base 01.

[0037] The flavored fluid can be a variety of flavoring liquids or seasonings, and can have fruity, herbal, coffee, or other flavors, designed to provide users with a rich sensory experience. The aerosol substrate 01 can be a product such as tobacco leaves or cigarettes, which, after heating, forms an aerosol for the user to inhale. The flavored fluid can be injected into the filter of the aerosol substrate 01 via a spike 21. When the user inhales, the aerosol produced by the aerosol substrate 01 passes through the filter and is superimposed with the flavor of the flavored fluid, creating a richer taste.

[0038] The size and shape of the accommodating cavity 102 are adapted to the aerosol base 01, so that the aerosol base 01 can be placed firmly and ensure that it does not move during the injection process; when the aerosol base 01 is completely inserted into the accommodating cavity 102, the spike needle 21 is also inserted into the filter tip of the aerosol base 01 at the same time, ensuring that the flavor fluid is evenly distributed and improving the taste level; or, after the aerosol base 01 is completely inserted into the accommodating cavity 102, the spike needle 21 moves to insert into the filter tip of the aerosol base 01.

[0039] like Figures 1 to 2 As shown, the aerosol substrate 01 is inserted into the accommodating cavity 102 and then separated from the accommodating cavity 102 .

[0040] See Figure 1The syringe 100 may be cylindrical in shape as a whole, and may have two ends and a peripheral wall 105 connected between the two ends. The two ends are respectively a top end 104 and a bottom end 106 opposite to each other. The top end 104 may be provided with the accommodating cavity 102. The opening of the accommodating cavity 102 for receiving the aerosol substrate 01 is located at the top end 104, so that the user can insert the aerosol substrate 01 from top to bottom, thereby improving the convenience of use for the user. Alternatively, refer to Figure 3 The accommodating chamber 102 is provided on the peripheral wall 105 of the liquid storage shell 10, and the opening of the accommodating chamber 102 is located on the peripheral wall 105, which is convenient for the user to insert the aerosol base 01 from the side, thereby improving the convenience of operation; or, the accommodating chamber 102 is provided at the bottom end 106 of the liquid storage shell 10, and the opening of the accommodating chamber 102 is located on the bottom end 106, and the liquid storage chamber 101 is relatively located above the accommodating chamber 102. Therefore, when the liquid storage chamber 101 supplies the flavor fluid to the spike needle 21, the effect of gravity can make the flavor fluid more smoothly pass through the infusion pipeline 22 and the spike needle 21 and be injected into the aerosol base 01, which is beneficial to improving the injection efficiency.

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

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

[0043] By directly fixing the puncture needle 21 on the accommodating cavity 102, the installation structure of the puncture needle 21 is simplified, the production cost is reduced, and the stability of the injection process is also improved.

[0044] Optionally, the spike needle 21 is movably disposed in the accommodating chamber 102, and the injector 100 further includes a driving member (not shown) connected to the spike needle 21 and configured to drive the spike needle 21 to move. When the aerosol substrate 01 is present in the accommodating chamber 102, the driving member can drive the spike needle 21 to penetrate the aerosol substrate 01, thereby injecting the flavor fluid into the aerosol substrate 01.

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

[0046] See also Figure 2 and Figure 4 ,in Figure 4 Yes Figure 1 Schematic diagram of the structure of the sharp needle in the injection device shown.

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

[0048] The connecting portion 211 is also fixedly connected to the bottom wall of the accommodating cavity 102 to ensure that the spike needle 21 is stable and not easy to fall off; the liquid delivery tube portion 212 and the spike portion 213 are both made of hard materials to facilitate penetration into the aerosol base 01, and the end of the spike portion 213 is beveled to enhance its penetrating power.

[0049] The aperture of spike 213 is smaller than that of liquid delivery tube 212. As the flavor fluid flows from the larger aperture into the smaller aperture, it generates a higher flow rate within spike 213, increasing the pressure injected into aerosol base 01. This ensures uniform distribution of the flavor fluid and enhances the flavor of the aerosol. Furthermore, the small aperture design of spike 213 effectively prevents backflow of the flavor fluid, ensuring a stable injection process.

[0050] The aperture of the spike portion 213 is 0.05-1.5 mm, and the aperture can specifically be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm or 1.5 mm, to ensure that the flavor fluid is quickly injected into the aerosol base 01 under a suitable pressure. This design takes into account both injection efficiency and injection accuracy, and can efficiently deliver a fixed amount of flavor fluid to the aerosol base 01, ensuring that the amount injected each time is accurate, and avoiding affecting the consistency of the aerosol taste due to excessive or insufficient injection.

[0051] If the diameter of the spike portion 213 is less than 0.05mm, it may result in excessive injection resistance, affecting the injection speed. If it is greater than 1.5mm, it may cause uneven injection of the flavored fluid, affecting the aerosol taste and making it difficult to accurately control the injection amount. Therefore, setting the diameter of the spike portion 213 to 0.05-1.5mm ensures both injection efficiency and uniform distribution and precise control of the flavored fluid, improving the performance consistency of the injector 100 and facilitating the addition of consistent quality to the aerosol substrate 01.

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

[0053] The infusion line 22 may also be a hard tube, and this application does not impose any 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 flow out and be injected into the aerosol base 01 through the infusion line 22 and the sharp needle 21, and the amount of flavor fluid injected into the aerosol base 01 can be regulated by pressing.

[0055] Optionally, the portion of the liquid storage shell 10 that constitutes the liquid storage chamber 101 may include a cylinder and a piston movably disposed in the cylinder, and the volume of the liquid storage chamber 101 is defined by the piston and the cylinder, so that the amount of flavor fluid injected into the aerosol base 01 can be adjusted by pushing the piston.

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

[0057] In other words, the user triggers the trigger key 12 by pressing or touching, and the trigger key 12 drives 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 accurately injected into the aerosol base 01 through the sharp needle 21.

[0058] The fluid drive mechanism 30 can precisely control and ensure that the amount of liquid injected into the aerosol base 01 is consistent each time, avoiding the difference in aerosol taste caused by fluctuations in the injection amount and improving the consistency of the product; at the same time, the design also simplifies the operating process, and users can achieve efficient and accurate 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), which is arranged on the infusion line 22. The trigger key 12 can be a mechanical key or a touch key. The trigger key 12 is electrically connected to the micro pump and can control the start and stop of the micro pump by a trigger signal. The micro pump can inject a quantitative amount of flavor fluid into the aerosol base 01 each time, and the amount injected each time can be set according to user needs. For example, the injection amount of different gears can be adjusted based on the number of presses, and each gear corresponds to a certain injection amount, thereby realizing refined management of the injection amount and meeting the user's diverse usage needs. The injection amount of each gear remains consistent, which can further improve the consistency and stability of the aerosol taste, and the user only needs to touch the trigger key 12 when using it to easily achieve precise injection, which is simple and efficient to operate.

[0060] In this embodiment, Figure 1 As shown, the fluid drive mechanism 30 includes a negative pressure tube 31, a piston 32 and a check valve 33. The piston 32 is movably arranged in the negative pressure tube 31. The bottom wall of the negative pressure tube 31 is provided with a liquid inlet 310 connected to the liquid storage chamber 101. The check valve 33 is installed at the liquid inlet 310. The piston 32 is provided with a liquid outlet channel 320. The infusion pipeline 22 is connected to the piston 32 and connected to the liquid outlet channel 320. When the piston 32 moves upward, negative pressure is generated in the negative pressure tube 31, and the check valve 33 opens to extract the flavor fluid in the liquid storage chamber 101 from the liquid inlet 310 into the negative pressure tube 31, and push the flavor fluid in the negative pressure tube 31 to the infusion pipeline 22 through the liquid outlet channel 320.

[0061] See also Figure 1 and Figure 5 , Figure 5 Yes Figure 1 Schematic diagram of the explosion structure of the injector shown.

[0062] The liquid storage shell 10 can include an upper shell 11 and a lower shell 13, which can be snap-connected, threaded or connected by fasteners. The upper shell 11 is provided with a accommodating 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 infusion pipeline 22, etc., wherein the lower shell 13 is provided with a partition 131 for covering the liquid storage cavity 101, and the negative pressure tube 31 is connected to the partition 131 and extends into the liquid storage cavity 101.

[0063] The liquid inlet 310 of the negative pressure tube 31 communicates with the liquid storage chamber 101, ensuring smooth extraction of the flavored fluid. Furthermore, the fluid drive mechanism 30 also includes a pipette 301 connected to the liquid inlet 310. The pipette 301 is located within the liquid storage chamber 101 and may be equipped with a filter to effectively prevent impurities from entering the negative pressure chamber of the negative pressure tube 31, thereby ensuring the purity of the flavored fluid. The pipette 301 can be made of a flexible silicone material that is easily bendable to accommodate extraction at various angles. Alternatively, the pipette 301 can be a metal tube, which is more stable and has a lower chance of ions or molecules being incorporated into the flavored fluid, thus minimizing flavor contamination. The length of the pipette 301 is optimized based on the depth of the liquid storage chamber 101 and the installation position of the negative pressure tube 31 to maximize aspiration efficiency and ensure sufficient absorption of the flavored fluid within the liquid storage chamber to prevent residual liquid.

[0064] The negative pressure tube 31 is a tubular structure with a smooth inner wall, which ensures that the piston 32 can move smoothly inside it, reduces frictional resistance, and improves injection efficiency; the check valve 33 is designed to allow the flavor fluid to enter the negative pressure tube 31 from the liquid storage chamber 101 through the liquid inlet 310, but does not allow the flavor fluid to flow back to the liquid storage chamber 101 through the liquid inlet 310, thereby ensuring the unidirectionality and stability of the injection process, and further improving the injection accuracy and reliability.

[0065] See also Figure 1 、 Figure 2 and Figure 5 The piston 32 slides back and forth within the negative pressure tube 31, with its precisely controlled sliding stroke ensuring consistent amounts of flavor fluid are drawn and pushed each time, improving overall injection accuracy. The connection between the negative pressure tube 31 and the piston 32 achieves a dynamic seal with excellent sealing, preventing flavor fluid leakage.

[0066] The piston disc 322 on the piston member 32 can be gap-fitted with the inner wall of the negative pressure tube 31 , or the piston disc 322 can be provided with micropores to allow the flavor fluid in the negative pressure tube 31 to be transferred from the space below the piston disc 322 to the space above the piston disc 322 .

[0067] Specifically, when the negative pressure tube 31 moves, the size of the space on both sides of the piston disk 322 changes dynamically, thereby achieving accurate extraction and pushing of the 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 state of closing the liquid inlet 310, the space under the piston disc 322 gradually decreases, and the space above the piston disc 322 gradually increases, forming a pressure difference, which prompts 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 tube 31 or the micropores on the piston disc 322; thereafter, 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 prompt the check valve 33 to open automatically, thereby releasing the cover on the liquid inlet 310, and the flavor fluid in the liquid storage chamber 101 is sucked into the negative pressure tube 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 to the infusion pipeline 22 through the liquid outlet channel 320 to inject liquid into the aerosol base 01, thereby completing one injection cycle. After the pressure difference on both sides of the check valve 33 is balanced, the check valve 33 will be automatically closed, ensuring the unidirectionality and stability of the liquid injection process.

[0068] The stroke of the piston 32 in the negative pressure tube 31 is fixed, so the amount of liquid injected each time can be accurately controlled to ensure that the amount of flavor fluid injected into the aerosol base 01 is consistent each time.

[0069] During initial use, there is no flavor fluid in the negative pressure tube 31. Therefore, a pre-filling operation is required to introduce the flavor fluid in the liquid 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 in the negative pressure tube 31.

[0070] Specifically, if Figure 2 and Figure 5 As shown, the piston member 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. A liquid outlet channel 320 is provided in the piston rod 324. The piston disc 322 is in clearance with the inner wall of the negative pressure tube 31. The piston disc 322 divides the space in the negative pressure tube 31 into a first working chamber 311 and a second working chamber 312. The first working chamber 311 is connected to the liquid inlet 310, and the second working chamber 312 is connected to the liquid inlet 310. 312 is connected to the liquid outlet channel 320; when the piston disc 322 moves upward, negative pressure is formed in the first working chamber 311, the check valve 33 opens, and the flavor fluid is drawn from the liquid inlet 310 into the first working chamber 311, and the flavor fluid in the second working chamber 312 is squeezed to be pushed into the infusion pipeline 22 through the liquid outlet channel 320; when the piston disc 322 moves downward, the check valve 33 is in a closed state, driving the flavor fluid in the first working chamber 311 to transfer to the second working chamber 312.

[0071] The piston rod 324 is a hollow tube structure, the channel inside the tube is the liquid outlet channel 320 , and a side hole is provided on the tube wall of the piston tube 324 near the piston plate 322 , and the side hole connects the liquid outlet channel 320 and the second working chamber 312 .

[0072] A cover plate may be provided at the top end of the negative pressure tube 31 , and the piston rod 324 may pass through the cover plate and be dynamically sealed with the cover plate. The cover plate design ensures good sealing when the piston rod 324 moves, thereby preventing leakage of the flavor fluid.

[0073] In this embodiment, Figure 2 and Figure 5 As shown, the fluid drive mechanism 30 is also provided with a seal 34 in the negative pressure tube 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 .

[0074] The seal 34 is also sealed against the inner wall of the negative pressure tube 31 and is dynamically sealed against the outer wall of the piston rod 324, ensuring that during the reciprocating motion of the piston rod 324, the flavor fluid does not leak from between the seal 34 and the negative pressure tube 31 and between the seal 34 and the piston rod 324, thereby further improving the sealing performance and stability of the injector 100.

[0075] The seal 34 includes a cylindrical sealing portion 341 and a sealing disk 342 arranged in the cylindrical sealing portion 341. The cylindrical sealing portion 341 fits tightly against the inner wall of the negative pressure tube 31. The piston rod 324 passes through the through hole on the sealing disk 342, and the sealing disk 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 disk 342 and the piston disk 322 to ensure a double sealing effect.

[0076] The cylindrical sealing portion 341 has a cylindrical structure, which fits tightly against the inner wall of the negative pressure tube 31. The sealing disk 342 is made of elastic sealing material, so that it can form a dynamic seal with the piston rod 324; or a sealing ring or an annular sealing lip is installed at the through hole of the sealing disk 342 to achieve dynamic sealing with the piston rod 324 through the sealing ring or annular sealing lip.

[0077] Furthermore, the fluid drive mechanism 30 also includes a movable handle 35 and a limit frame 36. The limit frame 36 is embedded in the pipe mouth of the negative pressure tube 31. The movable handle 35 is connected to the piston rod 324 and slides with the limit frame 36. A guide channel 350 connected to the liquid outlet channel 320 is provided in the movable handle 35.

[0078] The relative mounting position between the stop frame 36 and the negative pressure tube 31 is adjustable to limit the travel of the piston member 32, ensuring stable and precise reciprocating motion of the piston rod 324, thereby achieving quantitative injection. The inner wall surface of the stop frame 36 has been finely machined to achieve a smooth and precise sliding fit with the movable handle 35, reducing frictional resistance, improving movement efficiency, and minimizing movement deviation, thereby achieving more accurate quantitative injection.

[0079] One end of the piston rod 324 is inserted into the movable handle 35 and fixed therein. One end of the infusion pipeline 22 is connected to the movable handle 35 and communicated with the guide channel 350 thereon. The movable handle 35 can carry the piston rod 324 to move smoothly in the negative pressure tube 31 to ensure that the injection process is accurate.

[0080] The top end of the movable handle 35 may also be provided with an outwardly extending baffle, which can be easily driven by power, so that the movable handle 35 drives the piston rod 324 to move together.

[0081] The cooperation between the movable handle 35 and the limit frame 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 cause unstable and inconvenient movement. Therefore, the movable handle 35 also increases the driving convenience and stability.

[0082] In this embodiment, the check valve 32 is a sealing ball, which seals the liquid inlet 310 under its own weight; when the negative pressure in the negative pressure tube 31 reaches the negative pressure threshold, the sealing ball rises, causing the liquid inlet 310 to open and the flavor fluid to enter the first working chamber 311; when the negative pressure in the negative pressure tube 31 is lower than the negative pressure threshold, the sealing ball falls back, causing the liquid inlet 310 to close.

[0083] The sealing ball has a simple structure and low cost, and can effectively prevent fluid backflow under the action of gravity, ensuring the stability and consistency of the injection process.

[0084] Optionally, the check valve 32 may also be a butterfly check valve or a ball check valve, etc., and this application does not impose any specific limitation on this.

[0085] In this embodiment, the fluid drive mechanism 30 also includes an elastic member 37, which is arranged between the piston member 32 and the negative pressure tube 31, and the trigger key 12 is connected to the piston member 32; wherein, the trigger key 12 is pressed to drive the piston member 32 to move downward, and the elastic member 37 is compressed when the piston member 32 moves downward; the elastic member 37 is used to drive the piston member 32 to move upward after the trigger key 12 is released.

[0086] The elastic member 37 can be a compression spring. When used as the elastic member 37, the compression spring can provide a stable elastic force, allowing the piston member 32 to move smoothly when the trigger key 12 is pressed and released. The compression spring is relatively inexpensive and easy to purchase and replace, which helps reduce the manufacturing and maintenance costs of the entire injector 100. At the same time, the elastic force of the compression spring can be adjusted according to actual needs to accommodate different injection pressures and injection volumes, thereby improving the applicability and flexibility of the injector 100.

[0087] Optionally, the elastic member 37 may also be a rubber elastic sleeve or a disc spring, etc., and this application does not impose any specific restrictions on this.

[0088] The elastic member 37 can be arranged between the piston disc 32 and the bottom wall of the negative pressure tube 31, or the elastic member 37 can be arranged between the limit frame 36 and the baffle of the movable handle 35, and the elastic member 37 can be compressed when moving downward.

[0089] 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 downward, compressing the elastic part 37; after releasing the trigger key 12, the elastic part 37 restores its deformation, pushing the piston rod 324 and the trigger key 12 to reset, ensuring the continuity and accuracy of the injection operation.

[0090] See Figure 6 , Figure 6 It is a schematic cross-sectional structural diagram of another embodiment of the liquid injector provided in the present application.

[0091] In other embodiments, the movement of the piston member 32 may be controlled electrically. For example, the fluid drive mechanism 30 further includes a motor 39 and a transmission member 38 . The transmission member 38 is in transmission connection between the motor 39 and the piston member 32 . The trigger button 12 is electrically connected to the motor 39 . When the trigger button 12 is triggered, the motor 39 drives the piston member 32 to move up and down via the transmission member 37 .

[0092] For example, the transmission member 38 can be connected to the movable handle 35 to indirectly drive the piston member 32 to move.

[0093] The transmission member 38 can be a belt mechanism or a worm gear mechanism to efficiently convert the rotational power of the motor 39 into the linear motion of the piston member 32, ensuring a smooth and accurate injection process.

[0094] Compared with the manual method, the electric method is easier to operate and can provide more stable power output, further improving the injection accuracy and efficiency.

[0095] Different from the prior art, the present application discloses a liquid injector. By disposing a fluid drive mechanism within a liquid reservoir housing, the fluid is driven to discharge the flavored fluid within the reservoir chamber through a negative pressure tube and a liquid outlet passage on a piston. When the piston moves downward, a check valve closes, transferring the flavored fluid within the negative pressure tube from bottom to top. When the piston moves upward, the check valve opens, drawing the flavored fluid from the reservoir chamber from the liquid inlet into the negative pressure tube and discharging the flavored fluid within the negative pressure tube through the liquid outlet passage. Thus, the fluid intake and discharge processes are completed during each reciprocating stroke of the piston, and the amount of flavored fluid discharged during each cycle is constant, enabling reliable and continuous quantitative discharge. Furthermore, the fluid drive mechanism has a simple and efficient structure, allowing for easy miniaturization, making it suitable for use in small liquid reservoir housings, making it portable and convenient for users to use for injecting liquid into aerosol substrates.

[0096] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present 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 comprising a negative pressure tube, a piston, and a check valve, wherein the negative pressure tube is installed in the liquid storage housing, the piston is movably disposed in the negative pressure tube, a liquid inlet communicating with the liquid storage chamber is provided on the bottom wall of the negative pressure tube, the check valve is installed at the liquid inlet, and a liquid outlet channel is provided on the piston; When the piston moves upward, negative pressure is generated in the negative pressure tube, and the check valve opens to draw the flavor fluid in the liquid storage chamber from the liquid inlet into the negative pressure tube, and discharge the flavor fluid in the negative pressure tube through the liquid outlet channel.

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

3. The liquid injector according to claim 2, characterized in that: The fluid driving mechanism is further provided on a sealing member in the negative pressure tube, the piston rod passes through the sealing member and maintains a dynamic seal with the sealing member, and the second working chamber is located between the sealing member and the piston disc.

4. The liquid injector according to claim 2, characterized in that: The fluid drive mechanism also includes a movable handle and a limit frame, the limit frame is embedded in the pipe mouth of the negative pressure tube, the movable handle is connected to the piston rod and slidably cooperates with the limit frame, and a guide channel connected to the liquid outlet channel is provided in the movable handle.

5. The liquid infuser according to claim 4, characterized in that: The fluid drive mechanism further includes an elastic member, which is arranged between the piston member and the negative pressure tube, or between the limiting frame and the movable handle; The syringe further comprises a trigger key provided on the liquid storage shell, wherein the trigger key is connected to the movable handle; The trigger button is pressed to drive the piston to move downward through the movable handle, and the piston compresses the elastic member when moving downward; the elastic member is used to drive the piston to move upward after the trigger button is released.

6. The liquid infuser according to claim 4, characterized in that: The fluid drive mechanism further includes a motor and a transmission member, wherein the transmission member is transmission-connected between the motor and the movable handle; The syringe further comprises a trigger button provided on the liquid storage housing, wherein the trigger button is electrically connected to the motor; When the trigger button is triggered, the motor drives the movable handle to slide back and forth along the limiting frame through the transmission member.

7. The liquid infuser according to claim 2, characterized in that: The check valve is a sealing ball that seals the liquid inlet under its own weight; When the negative pressure in the negative pressure tube reaches a negative pressure threshold, the sealing ball rises, causing the liquid inlet to open and the flavor fluid to enter the first working chamber; when the negative pressure in the negative pressure tube is lower than the negative pressure threshold, the sealing ball falls back, causing the liquid inlet to close.

8. The liquid infuser according to claim 1, characterized in that: The liquid storage housing further comprises a receiving cavity, and the receiving cavity is used to receive the aerosol matrix; The injector also includes a spike assembly, which includes a spike needle and an infusion pipeline. The infusion pipeline connects the spike needle and the liquid outlet channel of the piston member. The spike needle is connected to the bottom wall of the accommodating cavity and is used to pierce the aerosol matrix in the accommodating cavity to inject flavor fluid into the aerosol matrix.

9. The liquid infuser according to claim 8, characterized in that: The length of the puncture needle extending from the bottom wall of the accommodating cavity is less than the depth of the accommodating cavity.

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

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