Syringe

Abstract

The utility model provides an injector, and relates to the technical field of electronic atomization. The injector comprises a needle tube and a push injection assembly, the needle tube extends in the preset direction, and the needle tube is provided with a push injection section, a liquid storage section and a needle head which are sequentially communicated in the preset direction; the volume of the injection section is smaller than that of the liquid storage section; one end of the injection assembly is located outside the injection section, and the other end of the injection assembly is arranged in the injection section in a sliding mode and matched with the injection section in a dynamic sealing mode. The injector provided by the utility model aims to ensure that the dosage of the injected taste liquid is accurately controlled, is simple and convenient to operate, can prevent excessive injection and excessive addition of the taste liquid, can improve the injection operation efficiency, and saves time and labor.

Description

Technical Field

[0001] The present application relates to the technical field of electronic atomization, and in particular to a syringe. Background Art

[0002] The syringes used for adding flavor liquid to cigarettes are all conventional syringes. When performing the filling operation, most of them are manually controlled by observing and controlling the push speed to control the filling amount, which requires a high level of manual experience. However, this operation method leads to low efficiency, time-consuming and labor-intensive filling operations; and it is easy to cause over-filling, resulting in waste. Utility Model Content

[0003] In view of this, the present application provides a syringe for solving the problems of low efficiency, time-consuming and labor-intensive filling of flavor liquid and difficulty in accurately controlling the filling amount.

[0004] This application provides the following technical solutions:

[0005] In one embodiment, a syringe is provided, the syringe comprising:

[0006] A needle tube, the needle tube is extended along a preset direction, and the needle tube has a push injection section, a liquid storage section and a needle head which are sequentially connected along the preset direction; wherein the volume of the push injection section is smaller than the volume of the liquid storage section;

[0007] A push injection assembly, one end of which is located outside the push injection section, and the other end is slidably arranged in the push injection section and cooperates with the push injection section dynamic seal.

[0008] In one embodiment, the push injection assembly includes:

[0009] A pressing member, wherein a first end of the pressing member is located outside the pushing section, and a second end of the pressing member is slidably disposed inside the pushing section;

[0010] An elastic reset member is respectively connected to the needle tube and the pressing member, and applies a force to the pressing member that is back to the needle tube, so as to drive the pressing member to reset after the thrust acting on the pressing member is removed.

[0011] In one embodiment, the push injection assembly further includes:

[0012] The sealing member is sleeved on the outer peripheral surface of the pressing member and is sealed between the outer periphery of the pressing member and the inner wall of the injection section.

[0013] In one embodiment, the outer peripheral surface of the pressing member is convexly provided with a first limiting edge located between two ends of the pressing member;

[0014] The syringe also includes a limiting cap, one end of which is connected to the pushing section, and the other end is provided with a through hole, the first end of the pressing member can be movably inserted into the through hole, and the through hole limits the first limiting edge within the limiting cap to limit the pressing member from escaping from the limiting cap.

[0015] In one embodiment, the outer diameter of the first limiting edge is greater than the inner diameter of the injection section.

[0016] In one embodiment, the elastic reset element comprises:

[0017] A spring is provided with a partition with an opening between the push injection section and the liquid storage section, and the spring is compressed between the partition and the second end.

[0018] In one embodiment, the pressing member has an expansion cavity, and the expansion cavity is connected to the liquid storage section.

[0019] In one embodiment, the needle tube has a receiving groove at one end where the needle is arranged, and the needle is received in the receiving groove; wherein the orientation of the notch of the receiving groove is the same as the orientation of the needle.

[0020] In one embodiment, the needle tube comprises:

[0021] tube body;

[0022] The needle tube seat is detachably connected to one end of the tube body, and the accommodating groove is arranged on the needle tube seat, and the needle is installed on the needle tube seat.

[0023] In one embodiment, a side wall of the receiving groove is provided with a visual window.

[0024] According to the syringe of the above embodiment, by sliding the push assembly along the push section, the liquid in the push storage section can be squeezed to make the liquid in the storage section be discharged from the needle; wherein, since the capacity of the push section is smaller than that of the storage section, the push section can be used as a "buffer zone". When the push assembly is actuated, the push section liquid and / or gas is first pushed into the storage section, and then the pressure is transmitted to ensure the stability and accuracy of the injection process, avoid the sudden outflow of a large amount of liquid, and facilitate accurate control of the injection volume. In summary, the present application aims to ensure accurate control of the dosage of the flavor liquid, is easy to operate, and can prevent over-injection and over-filling of the flavor liquid.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a syringe in an embodiment;

[0027] Figure 2 A schematic diagram of an explosion structure of a syringe in an embodiment;

[0028] Figure 3 is a schematic diagram of a first state of a syringe in an embodiment;

[0029] Figure 4 It is a schematic diagram of a second state of a syringe in an embodiment.

[0030] Description of main component symbols:

[0031] 100-cigarette; 110-insertion end; 200-injection assembly; 210-pressing member; 211-expansion chamber; 212-first limiting edge; 220-sealing member; 230-elastic reset member; 300-limiting cap; 310-through hole; 320-first large-diameter end; 330-first small-diameter end; 400-needle tube; 410-tube body; 411-injection section; 412-second small-diameter end; 413-second large-diameter end; 420-needle tube seat; 421-accommodating groove; 422-visible window; 430-liquid storage section; 500-needle head; 600-piston; X-preset direction. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0033] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0034] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0035] In the related art, with the continuous development of the tobacco industry, although the types of tobacco products are rich and diverse. However, in today's tobacco market, traditional cigarettes are still the most mainstream products in the tobacco industry. Similarly, different consumers have different demands for the taste of cigarettes. Therefore, taking the starting point of consumers as the demand and combining the laws of actual market development to meet the needs of consumers is a problem that producers need to solve.

[0036] However, in actual production, tobacco products are limited by technology or certain aspects, resulting in the monotony of tobacco products, which makes consumers feel lack of taste, cannot provide a perfect consumption experience, and cannot meet the diverse needs of consumers.

[0037] In the related art, most of them adopt the method of adding flavor liquid into traditional cigarettes to solve the problem of single flavor; among them, the syringes used for adding flavor liquid are all conventional syringes. When performing the filling operation, most of them control the injection speed by manual observation to control the filling amount, which requires high manual experience. However, this operation method leads to low efficiency of filling operation, time-consuming and labor-intensive; and it is easy to cause over-filling, resulting in waste.

[0038] In the present application, the push injection assembly 200 is used in conjunction with a syringe, so that the push injection assembly 200 is controlled to move along the push injection section 411, thereby being able to accurately control the filling amount, improve the efficiency of the filling operation, and save time and effort.

[0039] like Figure 1 and Figure 2 As shown, in order to solve the above technical problems, a syringe is provided in the present embodiment, which includes a needle tube 400 and a push injection assembly 200. The needle tube 400 is extended along a preset direction X, and the needle tube 400 has a push injection section 411, a liquid storage section 430 and a needle 500 which are sequentially connected along the preset direction X; wherein the volume of the push injection section 411 is smaller than the volume of the liquid storage section 430; one end of the push injection assembly 200 is located outside the push injection section 411, and the other end is slidably arranged in the push injection section 411 and dynamically sealed with the push injection section 411.

[0040] It is easy to understand that the needle tube 400 in the present application has a head end and a tail end, the head end of the needle tube 400 is equipped with the needle 500, the push section 411 is arranged at the tail end of the needle tube 400, and the liquid storage section 430 is located between the push section 411 and the needle 500, and then the push assembly 200 moves along the push section 411 to squeeze the liquid stored in the liquid storage section 430, which can be a flavor liquid, so that the flavor liquid flows out from the needle 500. Of course, in other embodiments, the liquid storage section 430 can also be used to store gaseous media, etc., which is not specifically limited here, and is specifically set according to the actual use scenario.

[0041] Among them, one end of the push injection component 200 is located outside the push injection section 411, and the other end is slidably set on the push injection section 411. The push injection component 200 and the push injection section 411 are dynamically sealed to be able to close the needle tube 400 to ensure that the flavor liquid stored in the liquid storage section 430 can only be discharged from the needle head 500.

[0042] For example, the needle tube 400 is configured as a circular cylinder, and the preset direction X is parallel to the axial direction of the needle tube 400; accordingly, the push section 411 extends along the axial direction, and the needle tube 400 has a head end and a tail end in the preset direction X. In other words, the push assembly 200 can move along the axial direction of the needle tube 400. The push assembly 200 only moves in the push section 411 to achieve push injection of the flavor liquid.

[0043] For example, the inner hole of the needle tube 400 is set as a stepped hole, and then the needle tube 400 has a second large diameter end 413 and a second small diameter end 412, the second small diameter end 412 constitutes a push section 411, the second large diameter end 413 constitutes a liquid storage section 430, and the push assembly 200 is slidably arranged in the second small diameter end 412. Obviously, the cross-sectional area of ​​the push section 411 can be set smaller than the cross-sectional area of ​​the liquid storage section 430. In addition, the length of the push section 411 can also be set smaller than the length of the liquid storage section 430. In this way, the volume of the push section 411 can be much smaller than the volume of the liquid storage section 430.

[0044] Of course, in other embodiments, the push section 411 and the liquid storage section 430 may also be set to a non-coaxial state, mainly to ensure that the push section 411 and the liquid storage section 430 are connected. For example, the needle tube 400 has a push section 411 and a liquid storage section 430, and the extension direction of the push section 411 and the extension direction of the liquid storage section 430 intersect, and the angle of intersection between the two can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, etc.

[0045] By using the syringe provided by the present application, the push injection assembly 200 can be slid along the push injection section 411 to squeeze the liquid in the push injection storage section 430 so that the liquid in the storage section 430 is discharged from the needle 500; wherein, since the capacity of the push injection section 411 is smaller than the capacity of the storage section 430, the push injection section 411 can be used as a "buffer zone". When the push injection assembly 200 is actuated, the liquid and / or gas in the push injection section 411 is first pushed into the storage section 430, and then the pressure is transmitted to ensure the stability and accuracy of the injection process, avoid the sudden outflow of a large amount of liquid, and facilitate accurate control of the injection volume. In summary, the present application aims to ensure accurate control of the dosage of the flavor liquid, is easy to operate, and can prevent excessive push injection and prevent excessive filling of the flavor liquid.

[0046] like Figure 1 and Figure 2 As shown, in some embodiments, the push member 200 includes a pressing member 210 and an elastic return member 230, the first end of the pressing member 210 is located outside the push segment 411, and the second end of the pressing member 210 is slidably disposed in the push segment 411; the elastic return member 230 is respectively connected to the needle tube 400 and the pressing member 210, and applies a force to the pressing member 210 that is back to the needle tube 400, so as to drive the pressing member 210 to reset after the thrust acting on the pressing member 210 is removed.

[0047] In this embodiment, the pressing member 210 has a second end that can be extended into the push injection section 411, that is, the second end and the push injection section 411 are dynamically sealed, and can be moved along the push injection section 411 by pressing and pulling the pressing member 210. Obviously, in the case of only setting the pressing member 210, it is necessary to manually apply force on it directly during the injection stage to start the injection process; and after the pressing of the above-mentioned pressing member 210 is completed, it is necessary to manually pull back the pressing member 210 to the initial position, and suck external air into the liquid storage section 430 to supplement the air pressure, and the whole process is relatively inconvenient; therefore, it is possible to set an elastic reset member 230, manually press the pressing member 210 to push the piston 600 to move, and at the same time drive the elastic reset member 230 to elastically deform, and then when the operator releases the pressing member 210, the elastic reset member 230 can drive the pressing member 210 to reset to the initial state. In other words, there is no need to manually pull it back, only the pressing operation is required.

[0048] Exemplarily, the elastic return member 230 is disposed between the pressing member 210 and the injection pushing section 411, and is usually a spring or an elastomer. It stores energy when pressed, and can push the pressing member 210 to return to its original position after the pressure is released, and can control the injection speed and force.

[0049] Exemplarily, the second end of the pressing member 210 and the push section 411 are dynamically sealed and cooperated, so that the push section 411 of the pressing member 210 can form a piston 600 structure; of course, in other embodiments, a piston 600 can also be separately provided in the push section 411, and the piston 600 is directly connected to the pressing member 210, and the liquid is pushed through the elastic reset member 230, and the piston 600 moves in the needle tube 400 to achieve liquid propulsion. And through the connection between the needle tube 400 and the elastic reset member 230, the stability of the limit control is ensured. In general, the dual role of the elastic reset member 230 not only helps to drive the pressing member 210 to reset, but also provides the piston 600 to return to its original position, ensuring the smoothness and controllability of the injection, and the interaction between the pressing member 210 and the elastic reset member 230 controls the entire injection process, ensuring the accuracy of the injection dosage.

[0050] like Figure 1 and Figure 2 As shown, in some embodiments, the push injection assembly 200 further includes a sealing member 220 which is sleeved on the outer circumference of the pressing member 210 and sealed between the outer circumference of the pressing member 210 and the inner wall of the push injection section 411 .

[0051] In this embodiment, the sealing member 220 is sleeved on one end of the pressing member 210 which is slidably arranged on the pushing section 411, so as to form a dynamic sealing fit between the pressing member 210 and the pushing section 411 through the elastic deformation of the sealing member 220. Obviously, such a setting can form a piston 600 at one end of the pressing member 210 located in the pushing section 411, without the need to install the piston 600 additionally, thereby reducing the cost and assembly difficulty.

[0052] In other words, the piston 600 and the pressing member 210 are integrated into one piece, which reduces the number of components, simplifies the structure, improves the overall compactness, and reduces assembly costs and failure points.

[0053] Exemplarily, the pressing member 210 has a second end, the second end is inserted into the pushing section 411, the outer peripheral surface of the second end is provided with a first annular groove, and a first elastic sealing ring is provided in the first annular groove, so that the first elastic sealing ring can be used to seal the gap between the second end and the inner wall of the pushing section 411, so that the second end forms a piston 600.

[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the outer peripheral surface of the pressing member 210 is convexly provided with a first limiting edge 212 located between the two ends of the pressing member 210;

[0055] The syringe also includes a limiting cap 300, one end of which is connected to the push section 411, and the other end is provided with a through hole 310. The first end of the pressing member 210 can be movably inserted into the through hole 310, and the through hole 310 limits the first limiting edge 212 within the limiting cap 300 to limit the pressing member 210 from escaping from the limiting cap 300.

[0056] That is, the travel of the pressing member 210 in the preset direction X is limited by the matching limiting cap 300 . Obviously, the travel of the pressing member 210 in the preset direction X can be limited by configuring the through hole 310 .

[0057] Of course, it is possible to limit the single stroke of the push injection component 200 to ensure that the filling amount of the flavor liquid injected each time the push injection component 200 is driven to move is certain. The specific filling can be controlled by controlling the number of times the push injection component 200 is driven to move; or, by reasonably configuring the single filling amount, the filling can be completed by driving the push injection component 200 to move only once.

[0058] Obviously, the limit cap 300 substantially defines the maximum liquid discharge volume of the injection by limiting the stroke of the pressing member 210 in the needle tube 400, thereby ensuring the accuracy of the dosage of the flavor liquid each time it is filled, preventing overdosage or underdosage, saving time and effort, and facilitating control; and, limiting the movement range of the pressing member 210 to prevent mechanical damage that may be caused by excessive advancement, such as rupture of the needle tube 400, thereby protecting the structural integrity of the syringe; and being able to avoid overfilling and waste of flavor liquid caused by misoperation; in addition, the limit cap 300 simplifies the operation, so that the user does not need to worry about over-injection control, but only needs to press to the bottom, and by controlling the number of presses, accurate filling of the flavor liquid can be achieved, thereby reducing operational anxiety and improving ease of use.

[0059] For example, the power source of the push assembly 200 is manual drive; when working, the push assembly is manually pressed and pulled to drive the movement; of course, in other embodiments, the power source of the push assembly can also be a motor, a pneumatic cylinder, a hydraulic cylinder, etc., which is not specifically limited here. In other words, as long as it can drive the push assembly to move back and forth, it will be fine.

[0060] In addition, the structure of the limiting cap 300 is not specifically limited here, as long as it can ensure that the limiting cap 300 can limit the push injection assembly 200; that is, the limiting cap 300 limits the push injection assembly 200 so that the pressing member 210 has two limit positions. When the pressing member 210 moves to any limit position and cannot continue to move forward, it needs to move in the reverse direction. For example, the two limit positions are respectively an upper limit position and a lower limit position. When the needle tube 400 vertically injects flavor liquid into the cigarette 100, the pressing member 210 can only move between the upper limit position and the lower limit position.

[0061] Exemplarily, the limiting cap 300 is used to limit the axial travel of the pressing member 210 in the needle tube 400. The push section 411 can be arranged within the moving range of the second end of the pressing member 210, that is, the pressing member 210 only moves in the push section 411 to realize the push injection of the flavor liquid.

[0062] like Figure 1 As shown, in some embodiments, the outer diameter of the first limiting edge 212 is greater than the inner diameter of the injection section 411 .

[0063] In this embodiment, since the outer diameter of the first limiting edge 212 is larger than the inner diameter of the pushing section 411, that is, the first limiting edge 212 cannot enter the pushing section 411, and then the pushing section 411 cooperates with the end surface of the limiting cap 300 to limit the first limiting edge 212 inside the limiting cap 300.

[0064] Exemplarily, the aperture of the through hole 310 is smaller than the inner aperture of the limiting cap 300, so that the limiting cap 300 has a first large diameter end 320 and a first small diameter end 330, forming a stepped structure, and the limiting cap 300 extends along a preset direction X, and the first large diameter end 320 is directly connected to the needle tube 400. Optionally, the first large diameter end 320 is directly sleeved on the end of the push injection section 411 as a support point of the limiting cap 300.

[0065] The push section 411 is inserted into the first large diameter end 320, which is related to the connection between the piston 600 for pushing the liquid and the first large diameter end 320, and controls the advancement of the liquid. The pressing member 210 is inserted into the first small diameter end 330, and the user directly applies force through the pressing member 210. In the initial state, the pressing member 210 is partially located outside the limit cap 300 to ensure that the pressing member 210 has a pressing stroke, that is, it means that before the operation, a certain distance is maintained to leave a force space to cooperate with the pressing action.

[0066] Obviously, since the limiting cap 300 has a first large diameter end 320 and a first small diameter end 330, the limiting cap 300 has a hole shoulder, that is, the end face inside the limiting cap 300, which cooperates with the end face of the pushing section 411 inserted into the limiting cap 300 to form a pair of second limiting ends, ensuring the movement range of the pushing section 411 and preventing over-pushing.

[0067] On the whole, by cooperating and limiting the first large diameter end 320 , the first small diameter end 330 and the injection section 411 of the limiting cap 300 , the movement of the pressing member 210 is precisely controlled to achieve accurate injection control of the liquid in the device to prevent overdosage.

[0068] Of course, in other embodiments, the maximum stroke of the pressing member 210 may also be limited when the corresponding spring is compressed to the maximum limit.

[0069] like Figure 1As shown, in some embodiments, the elastic return member 230 includes a spring, and a partition with an opening is provided between the injection section 411 and the liquid storage section 430, and the spring is compressed between the partition and the second end.

[0070] In this embodiment, the second end is abutted against a spring and a partition, the spring is in a compressed state, and the partition is located on the inner wall at the connection between the injection section 411 and the liquid storage section 430, thereby ensuring that the spring can be compressed during the process of pressing the above-mentioned pressing member 210, and when the pressing member 210 is released, the restoring elastic force of the spring can drive the pressing member 210 to reset.

[0071] Of course, in other embodiments, the spring may also be arranged at one end of the pressing member 210 away from the second end, and the two ends of the spring are respectively connected to the needle tube 400 and the pressing member 210, so as to ensure that the spring can be stretched during the process of pressing the above-mentioned pressing member 210, and when the pressing member 210 is released, the restoring elastic force of the spring can drive the pressing member 210 to reset.

[0072] Optionally, in other embodiments, the elastic reset member 230 may also be an elastic gasket, a magnetic body, an airbag, a rubber body, a silicone body, etc., which is not specifically limited here.

[0073] In some embodiments, the limiting cap 300 has a plurality of installation positions, and the plurality of installation positions are configured to enable the push-injection segment 411 to penetrate the through hole 310 to different depths.

[0074] In short, the position of the limiting cap 300 is flexible, and through the cooperation of multiple installation positions, the injection section 411 is allowed to be set at different depths of the first large diameter end 320, which realizes the following functions:

[0075] 1. By changing the insertion depth of the push-injection section 411, the stroke of the second end is substantially adjusted, allowing the injection dose to be adjusted. Users can set different depths according to their needs to achieve different amounts of drug output, thereby increasing the flexibility of use;

[0076] 2. Multiple installation positions provide accurate positioning of the push injection segment 411, ensuring the repeatability of each injection volume and reducing dosage errors;

[0077] 3. It meets the needs of different scenarios, some of which may require different dosages of filling; users can adjust the dosage according to their needs, and multiple installation positions are convenient and quick to replace without complicated tools, which improves the user experience.

[0078] In summary, this design not only improves the flexibility and accuracy of the dosage control of the syringe through the multi-position installation of the limiting cap 300, but also ensures the convenience of use.

[0079] For example, in order to realize the adjustable position setting of the limiting cap 300, the limiting cap 300 shell adopts a threaded connection mode, that is, the limiting cap 300 is connected to the push-injection segment 411 through a threaded structure, and then the depth of the push-injection segment 411 inserted into the limiting cap 300 can be adjusted by rotating the limiting cap 300. Of course, in other embodiments, the limiting cap 300 is directly sleeved on the end of the push-injection segment 411, and the limiting cap 300 and the push-injection segment 411 are interference-fitted, and the depth of the push-injection segment 411 inserted into the limiting cap 300 can be adjusted by pushing and pulling the limiting cap 300. In this way, it is necessary to ensure that the friction between the limiting cap 300 and the push-injection segment 411 is greater than the maximum elastic force of the elastic reset member 230 to prevent the limiting cap 300 from being separated from the push-injection segment 411 during use. Alternatively, the limiting cap 300 is sleeved on the push-injection segment 411 and fixed by a fastening screw.

[0080] like Figure 1 As shown, in some embodiments, the pressing member 210 has an expansion cavity 211 , and the expansion cavity 211 and the liquid storage section 430 are connected.

[0081] In this embodiment, the expansion cavity 211 is connected to the liquid storage section 430, which can increase the storage space. For example, the expansion cavity 211 is processed by punching;

[0082] Of course, in other embodiments, it can also be formed by injection molding, which is not specifically limited here.

[0083] like Figure 1 and Figure 2 As shown, in some embodiments, one end of the needle tube 400 where the needle 500 is disposed has a receiving groove 421 , and the needle 500 is received in the receiving groove 421 ; wherein the orientation of the notch of the receiving groove 421 is the same as the orientation of the needle 500 .

[0084] In this embodiment, the receiving groove 421 can be used to insert the insertion end 110 of the cigarette 100, and the needle 500 is placed in the receiving groove 421 to hide the needle 500 and prevent the needle 500 from stabbing the user. In actual use, the guiding function of the receiving groove 421 is used to guide the needle 500 to pierce the insertion end 110.

[0085] Exemplarily, when the insertion end 110 is a cylindrical structure, the inner contour of the receiving groove 421 can also be set to a cylindrical structure to ensure the adaptation of the two; of course, in other embodiments, the receiving groove 421 can also be a prismatic cavity, an elliptical cavity, etc., which is not specifically limited here.

[0086] like Figure 2As shown, in some embodiments, the needle tube 400 includes a tube body 410 and a needle tube seat 420, the needle tube seat 420 is detachably connected to one end of the tube body 410, and the accommodating groove 421 is set in the needle tube seat 420, and the needle 500 is installed on the needle tube seat 420.

[0087] That is, the needle tube 400 is set to be split, that is, the tube body 410 and the needle tube seat 420 are assembled to form the needle tube 400, which is convenient for subsequent replacement of parts. For example, since the needle tube seat 420 frequently contacts the cigarette 100 and is a vulnerable part, the split setting is convenient for replacing the needle tube seat 420, reducing the cost of later use.

[0088] Exemplarily, the end of the needle tube seat 420 away from the receiving groove 421 is inserted into the tube body 410, and the end of the needle tube seat 420 inserted into the tube body 410 is provided with a second annular groove, and a second elastic sealing ring is provided in the second annular groove, so that the needle tube seat 420 and the tube body 410 can be sealed. Optionally, the needle tube seat 420 and the tube body 410 are interference fit; or, the needle tube seat 420 and the tube body 410 are connected by threads, etc., which are not specifically limited here.

[0089] like Figure 3 and Figure 4 As shown, in some embodiments, a side wall of the receiving groove 421 is provided with a visible window 422 .

[0090] In simple terms, the visual window 422 facilitates observation of the docking of the needle 500 and the insertion end 110 of the cigarette 100, and whether excessive addition occurs. There is no need to specifically define the shape and structure of the visual window 422, and it is sufficient to ensure that the situation in the receiving groove 421 can be observed. The focus is on ensuring observability, which means that the design has a large degree of freedom and strong adaptability. It can be round, rectangular, strip, square, etc., as long as the internal situation is clearly visible. To better understand the technical solution of this application, the following methods are provided:

[0091] Exemplarily, the visible window 422 covers a partial area of ​​the side wall of the receiving groove 421 ; of course, in other embodiments, the visible window 422 may also be configured to cover the entire area of ​​the side wall of the receiving groove 421 .

[0092] Optionally, a transparent area is provided on the side wall of the receiving groove 421 , and the transparent area constitutes a visual window 422 ; or, an observation port is opened on the side wall of the receiving groove 421 to ensure that the situation inside the receiving groove 421 can be observed.

[0093] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0094] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0095] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A syringe, characterized in that The syringe comprises: A needle tube (400), the needle tube (400) extending along a preset direction (X), the needle tube (400) comprising a push injection section (411), a liquid storage section (430), and a needle head (500) which are sequentially connected along the preset direction (X); wherein the volume of the push injection section (411) is smaller than the volume of the liquid storage section (430); A push injection assembly (200), one end of which is located outside the push injection section (411), and the other end of which is slidably disposed inside the push injection section (411) and dynamically sealed with the push injection section (411).

2. The syringe according to claim 1, characterized in that The push injection assembly (200) comprises: A pressing member (210), wherein a first end of the pressing member (210) is located outside the injection pushing section (411), and a second end of the pressing member (210) is slidably disposed inside the injection pushing section (411); An elastic reset member (230) is connected to the needle tube (400) and the pressing member (210) respectively, and applies a force to the pressing member (210) that is directed away from the needle tube (400), so as to drive the pressing member (210) to reset after the thrust acting on the pressing member (210) is removed.

3. The syringe according to claim 2, characterized in that The push injection assembly (200) further comprises: The sealing member (220) is sleeved on the outer peripheral surface of the pressing member (210) and seals between the outer periphery of the pressing member (210) and the inner wall of the injection section (411).

4. The syringe according to claim 2, characterized in that The outer peripheral surface of the pressing piece (210) is convexly provided with a first limiting edge (212) located between the two ends of the pressing piece (210); The syringe further comprises a limiting cap (300), one end of which is connected to the injection section (411), and the other end of which is provided with a through hole (310). The first end of the pressing member (210) can be movably inserted into the through hole (310), and the through hole (310) limits the first limiting edge (212) within the limiting cap (300) to limit the pressing member (210) from escaping from the limiting cap (300).

5. The syringe according to claim 4, characterized in that The outer diameter of the first limiting edge (212) is greater than the inner diameter of the injection pushing section (411).

6. The syringe according to claim 4, characterized in that The elastic reset member (230) comprises: A spring, a partition with an opening is provided between the push injection section (411) and the liquid storage section (430), and the spring is compressed between the partition and the second end.

7. The syringe according to claim 2, characterized in that The pressing member (210) has an expansion cavity (211), and the expansion cavity (211) and the liquid storage section (430) are connected.

8. The syringe according to any one of claims 1 to 7, characterized in that: The needle tube (400) has a receiving groove (421) at one end where the needle (500) is arranged, and the needle (500) is received in the receiving groove (421); wherein the orientation of the notch of the receiving groove (421) is the same as the orientation of the needle (500).

9. The syringe according to claim 8, characterized in that The needle tube (400) comprises: tube body(410); The needle tube seat (420) is detachably connected to one end of the tube body (410), and the receiving groove (421) is arranged on the needle tube seat (420), and the needle (500) is installed on the needle tube seat (420).

10. The syringe according to claim 8, characterized in that A visual window (422) is provided on the side wall of the containing groove (421).

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