Needleless injector
By introducing pressure push rods, buffer springs and pressing parts into needle-free syringes, the problems of incomplete injection and syringe drop are solved, the accuracy and safety of drug injection is achieved, the use process is simplified, and the use is reduced. The impact force during injection.
Patent Information
- Application Number
- CN202323481976.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2033-12-20
AI Technical Summary
During the use of existing needleless syringes, it is difficult for patients to accurately determine whether the drug injection is complete and cannot grasp the injection force. After the injection is completed, the syringe may have a problem of falling and breaking.
A needle-free syringe is designed, including a syringe, injection tube, pressure pusher, buffering spring, thrust cylinder, thrust plate, pressure spring and pressing member. Through the cooperation of the pressure pusher and the spring, it provides pressure relief and buffering function. , ensure that the user can be reminded after the injection is completed, avoid rebound, and improve the stability and safety of the injection through concave plane and round chamfer design.
The needleless syringe can remind the user through pressure release after the drug injection, avoid falling damage caused by rebound of the syringe, simplify the use steps, improve the accuracy and safety of the injection, reduce the pain during injection, and buffer through and pressure relief function stabilizes the injection process.
Smart Images
Figure CN222218366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a needle-free syringe. Background Art
[0002] With the development of the pharmaceutical industry and technology, and the fact that syringes with needles in the past would bring users fear of needles and pain from needle pricks, and in addition to meeting the needs of some small-batch, frequently injected drugs, needle-free syringes have gradually emerged and are widely used; needle-free injection technology refers to the technology of injecting drugs without the aid of a needle, but instead pressurizing the liquid drug so that the liquid drug directly enters the body's tissues in an ultra-fine, high-speed, straight-line spray manner; needle-free syringes can make the injected drugs more dispersed, which is beneficial to the absorption of the drug and reduces the damage to the subcutaneous tissue, avoids the formation of nodules, and reduces or avoids the patient's pain.
[0003] In the prior art, when patients use needle-free syringes for injections, they may suffer from incomplete injections due to unfamiliarity with the technique, and may not be able to accurately judge whether the injected medicine is completely consumed, or be unable to control the injection strength. The injection head may easily shift during injection, and the reverse thrust of the syringe after the injection is completed may make the patient unable to hold the syringe tightly, causing the syringe to fall and be damaged. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies in the prior art, the utility model provides a needle-free syringe, which can visually observe whether the drug is completely injected and has a pressure relief buffer function, thereby solving the problem that the patient cannot grasp the injection force and cannot accurately judge the injection dosage, and the reverse thrust may occur after the injection is completed, causing the syringe to fall and break.
[0006] (II) Technical solution
[0007] In order to achieve the above-mentioned purpose of being able to intuitively observe whether the drug is completely injected and having a pressure relief buffer function, the utility model provides the following technical solutions: a needle-free syringe comprises a syringe, the syringe is processed with a hollow inner cavity, an injection tube is arranged in the inner cavity of the syringe, a pressure push head is arranged in the inner cavity of the injection tube, the pressure push head is connected to a pressure push rod, a buffer spring is sleeved on the pressure push rod, a thrust cylinder is arranged at the end of the pressure push rod, a pressure spring is arranged on the thrust cylinder, one end of the pressure spring is connected to a pressure block, a thrust plate is arranged on the periphery of the thrust cylinder, the upper end of the thrust cylinder is connected to a pressing piece through the pressure block and the thrust plate, the thrust plate is arranged in a slide groove of an outer ring part of the pressing piece, the pressure block is arranged in a pressure cavity in the center of the pressing piece, a pressure relief hole connected to the outside is arranged at the upper end of the pressure cavity of the pressing piece, and the pressure relief hole is blocked by a sealing piece of the inner cavity at the top of the pressing piece in a natural state.
[0008] Preferably, an inner concave plane is provided at the center of the injection end of the syringe, and a round chamfer is provided on the outer circle. There are two inner concave planes, which are symmetrically arranged at the injection end of the syringe, the inner concave plane at the lower end is in contact with the skin of the injected patient, and the inner concave plane at the upper end is in contact with the end face of the injection head of the injection tube.
[0009] Preferably, the closing member includes a connecting plate, one end of which is provided with a closing spring connected to the top of the inner cavity of the pressing member, and the other end is provided with a pressure baffle corresponding to the position of the pressure relief hole, and the number of the pressure baffles is equal to the number of the thrust plates.
[0010] Preferably, a pressing head is provided at the end of the pressing piece.
[0011] Preferably, the pressing piece is provided with an inner plate and an outer plate from the inside to the outside, an inner cavity is provided at the center of the inner plate, and the slide groove is formed between the inner plate and the outer plate.
[0012] Preferably, the injection tube injection head is equipped with a drug adsorption head.
[0013] (III) Beneficial effects
[0014] Compared with the prior art, the utility model provides a needle-free syringe, which has the following beneficial effects: 1. The needle-free syringe, through the use of a pressure push rod, a pressure spring and a pressing piece, can remind the user of the completion of drug injection through the effect of pressure release after the drug injection is completed. At the same time, the syringe will not rebound after the pressure is released, thereby avoiding the syringe from falling and being damaged due to rebound. At the same time, the syringe is directly filled with liquid medicine through the injection port, and there is no need to take out the injection tube and reassemble it, which simplifies the steps of use and enables the user to use it faster and more conveniently; 2. The needle-free syringe can conveniently promote drug injection by setting a pressure push head. The buffer spring on the pressure push rod can alleviate the impact force on the human body during injection and reduce the pain during injection. The pressure spring can further ensure the stability and accuracy of the injection. The depth and angle of the pressing piece can be conveniently adjusted by the setting of the thrust plate to improve the flexibility and accuracy of the injection. The stability and accuracy of the injection can be further ensured by the setting of the pressure block. By setting up a pressure relief hole, pressure can be released in time during injection to prevent damage to the human body caused by excessive pressure. By setting a rounded chamfer on the outer circle of the syringe end, damage to the injected skin area can be avoided when squeezing and injecting after contacting the skin. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the needle-free syringe of the utility model.
[0016] Figure 2 It is a front view of the needle-free syringe of the present utility model.
[0017] Figure 3 It is a cross-sectional view of the needle-free syringe of the present utility model.
[0018] Figure 4 This is a cross-sectional view of the injection process of the needle-free syringe of the utility model.
[0019] Figure 5 The needle-free syringe of the utility model Figure 4 A schematic diagram of the enlarged structure in the middle.
[0020] In the figure: 1-syringe, 2-injection tube, 3-pressure push head, 4-pressure push rod, 5-buffer spring, 6-thrust cylinder, 7-thrust plate, 8-pressure spring, 9-pressure block, 10-pressing piece, 11-slide groove, 12-pressure release hole, 13-pressing head, 14-drug adsorption head, 15-inner concave plane, 16-connecting plate, 17-closing spring, 18-pressure baffle, 19-round chamfer. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] See also Figure 1-4 , a needle-free syringe comprises a syringe 1, wherein the syringe 1 is processed with a hollow inner cavity, an injection tube 2 is arranged in the inner cavity of the syringe 1, a pressure push head 3 is arranged in the inner cavity of the injection tube 2, the pressure push head 3 is connected to a pressure push rod 4, a buffer spring 5 is sleeved on the pressure push rod 4, a thrust cylinder 6 is arranged at the end of the pressure push rod 4, a pressure spring 8 is arranged on the thrust cylinder 6, one end of the pressure spring 8 is connected to a pressure block 9, and the thrust cylinder A thrust plate 7 is arranged on the periphery of the column 6. The upper end of the thrust cylinder 6 is connected to the pressing piece 10 through the pressure block 9 and the thrust plate 7. The thrust plate 7 is arranged in the slide groove 11 of the outer ring part of the pressing piece 10. The pressure block 9 is arranged in the pressure cavity at the center of the pressing piece 10. The upper end of the pressure cavity of the pressing piece 10 is provided with a pressure relief hole 12 connected to the outside. In the natural state, the pressure relief hole 12 is blocked by the closing piece of the top inner cavity of the pressing piece 10.
[0023] The drug adsorption head 14 is a cylindrical structure, with an inner concave circular chamfer and an inner concave plane 15 arranged inside, which can be easily adsorbed and fixed on the injection tube 2. The pressure push rod 4 is a cylindrical structure, with a buffer spring 5 arranged on the top, which can alleviate the impact force on the human body during injection and reduce the pain during injection. The thrust cylinder 6 is a cylindrical structure, with a pressure spring 8 arranged inside, which can further ensure the stability and accuracy of the injection. The thrust plate 7 is a plate-shaped structure, which is arranged in the slide groove 11 of the outer ring part of the pressing piece 10, and the depth and angle of the pressing piece 10 can be easily adjusted to improve the flexibility and accuracy of the injection. The pressure block 9 is a block-shaped structure, which is arranged in the pressure chamber at the center of the pressing piece 10, which can further ensure the stability and accuracy of the injection. The pressing piece 10 is a block-shaped structure, with a pressure release hole 12 arranged on the top, which can release the pressure in time during injection to prevent the damage to the human body caused by excessive pressure.
[0024] When in use, first connect the drug adsorption head 14 to the end face of the injection tube 2, and then attach the concave end face of the syringe 1 to the skin, so that the skin bulges toward the concave plane 15 and fits tightly against the injection port of the injection tube 2. Then press the pressure piece, first form a higher pressure in the pressure chamber, so that it pushes the pressure block 9, and the pressure block 9 compresses the buffer spring 5 so that it pushes the thrust cylinder 6 below to move downward. Under the action of the pressure push rod 4, the thrust cylinder 6 pushes the pressure push head 3 to squeeze the liquid medicine to the injection head of the injection tube 2, and enters the human body from the injection head. In the process of the thrust cylinder 6 pushing downward, the buffer spring 5 is compressed, so that the injection tube 2 is fixed, which has the same fixing effect as the process of the injection tube 2 absorbing the liquid medicine. When the pressure push head 3 is pushed to the lowest end, the thrust plate 7 just pushes the pressure baffle 18 upward, so that the outside is connected to the pressure chamber. After the pressure in the pressure chamber is released, the pressure spring 8 is also relaxed.
[0025] During use, the following points should be noted: when drawing the medicine, ensure that the syringe 1 and the drug adsorption head 14 are clean and sterile; when installing the syringe 1 and fitting it to the skin, ensure that the syringe 1 and the skin fit tightly to avoid leakage or air leakage; when pressing the pressing piece 10, ensure that the force is even and not excessive to avoid damage to the skin; during the injection process, closely observe the injection situation and the body's reaction. If there is any abnormality, stop in time and seek medical attention; after use, clean and disinfect the syringe 1 and related parts in time for next use.
[0026] The center of the injection end is provided with a concave plane 15, which can increase the stability of the injection tube 2 and prevent the tube from moving or tilting during the injection process, thereby improving the accuracy and stability of the injection. There are two concave planes 15, which are symmetrically arranged at the injection end of the syringe 1. The lower concave plane 15 fits the skin of the injection patient, and the upper concave plane 15 fits the injection head end face of the injection tube 2. In this way, the syringe 1 and the injection tube 2 can be better fixed, the vibration and shaking during the injection process can be reduced, and the comfort and safety of the injection can be improved. The lower concave plane 15 fits the skin of the injection patient, which can reduce the friction between the skin and the syringe 1, avoid skin damage, and also improve the accuracy and stability of the injection. The upper concave plane 15 fits the injection head end face of the injection tube 2, which can reduce the leakage or splashing of the liquid medicine during the injection process, and improve the accuracy and efficiency of the injection.
[0027] The closure member includes a connecting plate 16, and a closing spring 17 is disposed at one end of the connecting plate 16 and connected to the top of the inner cavity of the pressing member 10, which can increase the tightness and stability of the closure and prevent the liquid medicine from leaking out from the top of the pressing member 10 during the injection process. A pressure baffle 18 corresponding to the position of the pressure release hole 12 is disposed at one end of the connecting plate 16. The number of the pressure baffles 18 is equal to the number of the thrust plates 7, which can effectively control the flow and pressure of the liquid medicine during the injection process and improve the accuracy and safety of the injection. The number of the pressure baffles 18 is equal to the number of the thrust plates 7, and they can cooperate with each other to make the flow and pressure of the liquid medicine during the injection process more stable and uniform, reducing the instability and error of the injection.
[0028] The pressing piece 10 is provided with a pressing head 13 at the end thereof, which facilitates the operator to perform the injection operation and improves the convenience and efficiency of the injection. The pressing piece 10 is provided with an inner plate and an outer plate from the inside to the outside, and an inner cavity is provided at the center of the inner plate. The slide groove 11 is formed between the inner plate and the outer plate, which can increase the stability and durability of the pressing piece 10, and also improve the accuracy and stability of the injection. The injection head of the injection tube 2 is equipped with a drug adsorption head 14.
[0029] See also Figure 5 The outer ring of the injection end of the syringe 1 is provided with a round chamfer 19, which can reduce the friction and irritation to the skin during the injection process and improve the comfort and safety of the injection. The design of the round chamfer 19 can increase the smoothness and stability of the injection end, avoid shaking or sliding during the injection process, and improve the accuracy and stability of the injection.
[0030] Working principle: First, connect the drug adsorption head 14 to the end face of the injection tube 2. At this time, the injection tube 2 is fixed on the syringe 1 through the drug adsorption head 14, so that the concave circular chamfer of the end face of the injection tube 2 fits with the concave plane 15. The drug adsorption head 14 is inserted into the medicine liquid. By pulling and pressing the pressing head 13, the medicine liquid is absorbed into the injection tube 2 under the action of pressure. At this time, the drug adsorption head 14 is removed, and the concave end face of the syringe 1 is attached to the skin, so that the skin bulges toward the concave plane 15 and fits tightly against the injection port of the injection tube 2. Press the pressing piece 10 to first form a higher pressure in the pressure chamber, so that it pushes the pressure block 9. The pressure block 9 compresses the buffer spring 5 so that it pushes the thrust cylinder 6 below. Moving downward, the thrust cylinder 6 pushes the pressure push head 3 under the action of the pressure push rod 4 to squeeze the medicine liquid to the injection head of the injection tube 2, and then enters the human body from the injection head. At the same time, the buffer spring 5 is compressed in the process of the thrust cylinder 6 pushing downward, so that the injection tube 2 is fixed, which has the same fixing effect as the process of the injection tube 2 absorbing the medicine liquid. When the pressure push head 3 is pushed to the lowest end, the thrust plate 7 just pushes the pressure baffle 18 upward, so that the outside is connected to the pressure chamber. After the pressure in the pressure chamber is released, the pressure spring 8 is also relaxed, and the pressure in the entire syringe is released upward, so that it will not rebound. After the pressure is released, the user can also clearly feel that the injection of the medicine has been completed.
[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A needle-free syringe, comprising a syringe (1), wherein the syringe (1) is processed with a hollow inner cavity, and an injection tube (2) is arranged in the inner cavity of the syringe (1), characterized in that: The inner cavity of the injection tube (2) is provided with a pressure push head (3), the pressure push head (3) is connected to a pressure push rod (4), a buffer spring (5) is sleeved on the pressure push rod (4), a thrust cylinder (6) is provided at the end of the pressure push rod (4), a pressure spring (8) is provided on the thrust cylinder (6), one end of the pressure spring (8) is connected to a pressure block (9), a thrust plate (7) is provided on the outer periphery of the thrust cylinder (6), and the thrust cylinder (6) The upper end is connected to the pressing piece (10) through the pressure block (9) and the thrust plate (7); the thrust plate (7) is arranged in the slide groove (11) of the outer ring part of the pressing piece (10); the pressure block (9) is arranged in the pressure chamber at the center of the pressing piece (10); the upper end of the pressure chamber of the pressing piece (10) is provided with a pressure relief hole (12) connected to the outside; in a natural state, the pressure relief hole (12) is blocked by the sealing piece of the top inner chamber of the pressing piece (10).
2. The needle-free injector according to claim 1, characterized in that: The injection end of the syringe (1) is provided with an inner concave plane (15), and the outer ring is provided with a round chamfer (19). The inner concave planes (15) are two in number and are symmetrically arranged at the injection end of the syringe (1) from top to bottom. The lower inner concave plane (15) fits in contact with the skin of the patient being injected, and the upper inner concave plane (15) fits in contact with the end surface of the injection head of the injection tube (2).
3. The needle-free injector according to claim 1, characterized in that: The closing member comprises a connecting plate (16), one end of which is provided with a closing spring (17) connected to the top of the inner cavity of the pressing member (10), and one end of which is provided with a pressure baffle (18) corresponding to the position of the pressure relief hole (12), wherein the number of the pressure baffles (18) is equal to the number of the thrust plates (7).
4. The needle-free injector according to claim 1, characterized in that: A pressing head (13) is provided at the end of the pressing piece (10).
5. The needle-free injector according to claim 1, characterized in that: The pressing piece (10) is provided with an inner plate and an outer plate from the inside to the outside, respectively; an inner cavity is provided at the center of the inner plate; and the slide groove (11) is formed between the inner plate and the outer plate.
6. The needle-free injector according to claim 1, characterized in that: The injection head of the injection tube (2) is equipped with a drug adsorption head (14).