A needle-free syringe containing a double helical block

Abstract

The present invention provides a needle-free syringe containing a double helical block, comprising a double helical block, a sliding column, an elastic component, a push rod striking component, a motor, an ampoule, and an injection push rod arranged in the ampoule. The double helical block is a hollow cylinder, and two symmetrical spiral surfaces are milled out of the side wall. The elastic component is connected to the double helical block or the sliding column. The motor is used to drive the double helical block and the sliding column to move relative to each other. When the sliding column moves upward along the spiral surface of the double helical block, the elastic component stores energy. When the sliding column detaches from the spiral surface of the double helical block, the stored energy released by the elastic component is transmitted to the push rod striking component, and the push rod striking component strikes the injection push rod in the ampoule to achieve injection. The present invention adopts the cooperation of the double helical block and the sliding column, so that the motor can pressurize and store energy to the spring once or continuously, release the energy of the spring, and strike the ampoule push rod to implement single or continuous needle-free injection.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to a needle-free syringe containing a double-helix curved block. Background Art

[0002] Needle-free injection technology is a technology that can directly inject drugs into the human body without the need for a needle to pierce the human body. Needle-free injection has the advantage of being able to complete the injection without a needle, but it also has the disadvantages of strong vibration of the syringe and inability to inject continuously.

[0003] The use of spring energy storage for needle-free injection is a classic needle-free injection technique. The specific step of storing energy in the spring is usually to compress the spring directly through a lever with human power. Since the spring is not compressed by a motor or other driving method, continuous injection is not possible. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a needle-free syringe containing a double-helix curved block, which utilizes a motor to compress an elastic component through a curved surface, has a simple and light structure, and can realize continuous injection.

[0005] A needle-free syringe containing a double helical block comprises a double helical block, a sliding column, an elastic component, a push rod striking component, a motor, an ampoule, and an injection push rod arranged in the ampoule. The double helical block is a hollow cylinder with two symmetrical spiral surfaces milled out of the side wall. The elastic component is connected to the double helical block or the sliding column. The motor is used to drive the double helical block and the sliding column to move relative to each other. The sliding column stores energy for the elastic component when it moves upward along the spiral surface of the double helical block. When the sliding column detaches from the spiral surface of the double helical block, the stored energy released by the elastic component is transmitted to the push rod striking component. The push rod striking component strikes the injection push rod in the ampoule to achieve injection.

[0006] Furthermore, a bottom platform is provided at the lowest point on the spiral surface, and a top platform is provided at the highest point, and the sliding column can stay on the bottom platform and the top platform. When the double spiral block and the sliding column move relative to each other, the sliding column starts from the bottom platform on one spiral surface, reaches the top platform of the spiral surface along the spiral surface, and then descends in a straight line to the bottom platform of the other spiral surface.

[0007] Furthermore, it also includes a double helical block driving shell that wraps the double helical block, the push rod striking assembly includes a striking rod connected to the middle part of the sliding column, the striking rod extends downward from the lower hole of the double helical block, and a block is provided at the lower part of the striking rod, the elastic assembly is a spring sleeved on the outside of the striking rod, the spring is restricted between the lower part of the double helical block and the lower square block of the striking rod, and an ampoule is provided below the lower part of the striking rod; the motor is used to drive the double helical block driving shell to rotate, and then drive the double helical block to rotate, and the sliding column in contact with the double helical block drives the striking rod to slide upward.

[0008] Furthermore, it also includes a shell, the push rod striking assembly includes a striker, the striker is provided with a circular hole on the upper part and is closed at the lower part, the elastic assembly is a spring accommodated in the circular hole, the driving shaft of the motor is connected to the middle part of the sliding column, the double helical block is provided with a double helical block rack, the striker is provided with a striker rack, the double helical block rack is meshed and connected with the striker rack through an intermediate gear fixed on the shell; the motor is used to drive the sliding column to rotate along the spiral surface of the double helical block, and the rotating sliding column presses the double helical block downward.

[0009] Furthermore, two sides of the lower part of the double helical curved block are symmetrically extended to connect two double helical curved block slide bars, and the double helical curved block slide bars cooperate with corresponding double helical curved block slide grooves on the shell to achieve sliding connection.

[0010] Furthermore, the double-helical curved block rack is arranged on the inner side of the double-helical curved block slide bar.

[0011] Furthermore, the two sides of the beater are provided with a beater slide bar, and the beater slide bar cooperates with the beater slide groove on the shell to slide up and down.

[0012] Furthermore, the motor is a brushed DC motor or a brushless motor.

[0013] The present invention adopts the cooperation of a double helical block and a sliding column, and uses a motor to compress the elastic component through the spiral surface of the double helical block to store energy in the elastic component. Then, when the sliding column detaches from the spiral surface of the double helical block, the stored energy released by the elastic component is transmitted to the push rod to hit the component, so that the motor can pressurize and store energy for the elastic component once or continuously, allowing the energy of the elastic component to be released and hit the ampoule push rod to implement needle-free single or continuous injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the double helical curved block and the sliding column in the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of some components of the first embodiment of the present invention;

[0016] Figure 3 is a schematic structural diagram of Embodiment 1 of the present invention;

[0017] Figure 4 is a schematic diagram of the structure of some components of the second embodiment of the present invention;

[0018] Figure 5 It is a schematic diagram of the decomposed structure of some components of the second embodiment of the present invention;

[0019] Figure 6 It is a cross-sectional view of some components of the second embodiment of the present invention.

[0020] In the figure: 1—double helical block, 2—sliding column, 3, 10—double helical block driving shell, 4—beating rod, 5, 9—spring, 6—motor, 7—injection push rod, 8—ampoule, 11—bottom surface platform, 12—spiral surface, 13—top surface platform, 14—double helical block slide, 15—double helical block rack, 16—intermediate gear, 17—beater, 18—beater rack, 19—housing, 20—beater slide, 21—double helical block slide, 22—beater slide, 23—round hole. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0022] See also Figure 1-6 The present invention provides a needle-free syringe containing a double helical block, comprising a double helical block 1, a slide column 2, an elastic component, a push rod striking component, a motor 6, an ampoule 8, and an injection push rod 7 arranged in the ampoule 8. The double helical block 1 is a hollow cylinder, and two symmetrical spiral surfaces 12 are milled out of the side wall. The bottom and top of the spiral surface 12 are respectively provided with a bottom surface platform 11 and a top surface platform 13. The slide column 22 is a cylindrical structure, and its two ends are respectively overlapped on the two spiral surfaces 12. The two top ends can be installed with ball bearings, so that the two ends of the slide column 22 have better sliding or rolling contact with the two spiral surfaces 12. The motor 6 can be a brushed DC motor or a brushless motor.

[0023] The elastic component is connected to the double helical block 1 or the sliding column 2, and the motor 6 is used to drive the double helical block 1 and the sliding column 2 to move relative to each other. The sliding column 2 stores energy for the elastic component when it moves upward along the spiral surface 12 of the double helical block 1. When the sliding column 2 detaches from the spiral surface 12 of the double helical block 1, the stored energy released by the elastic component is transmitted to the push rod striking component, and the push rod striking component strikes the injection push rod 7 in the ampoule 8 to achieve injection, which can implement single or continuous needle-free injection. When equipped with a hedging device, single or continuous needle-free injection can be implemented under the premise of reducing recoil.

[0024] The spiral surface 12 of the double spiral block 1 has a corresponding thickness and strength, and can drive or support the sliding column 2. Each spiral surface 12 is provided with a bottom platform 11 and a top platform 13, which can accommodate the sliding column 2 to stay thereon. The slope of the spiral surface 12 has an optimized change rate, and the side unfolded projection of the spiral surface 12 can be a straight line, a cycloid or other curves with different change rates. The mutual movement of the double spiral block 1 and the sliding column 2 can be that the double spiral block 1 rotates along its axis, driving the sliding column 2 and its connecting parts to move up and down in a straight line; or the sliding column 2 rotates along its axis to drive the double spiral block 1 to move up and down in a straight line. When the double helical block 1 and the slide column 2 move relative to each other, the slide column 2 can start from a lowest point on the helical surface 12 (the junction of the bottom surface platform 11 and the helical surface 12), along the helical surface 12 to the highest point of the helical surface 12 (the junction of the top surface platform 13 and the helical surface 12), and then descend to another lowest point in a straight line; then, along another helical surface 12 to the highest point of the helical surface 12, and then descend to the starting position in a straight line. In this way, there can be a continuous movement over and over again. Among them, one rotation cycle can complete two vertical movements.

[0025] In summary, the present invention realizes the conversion from rotation to vertical motion through the double helical block 1 and the sliding column 2. Using this device, the motor after deceleration has enough power to compress the elastic component (such as a spring) to store energy. The advantage of using the double helical block 1 as a driving member is that the force applied to the double helical block 1 and the sliding column 2 is a balanced and symmetrical force, the working principle is reliable, and it is easy to implement.

[0026] See also Figure 2-3 , is a schematic diagram of the structure of a part of the components of one embodiment of the present invention, wherein the double helical block driving shell 3 wraps and connects the double helical block 1, a sliding column 2 is arranged on the double helical block 1, the middle part of the sliding column 2 is connected to the striking rod 4, the striking rod 4 extends downward out of the lower hole of the double helical block 1, and the lower part of the striking rod 4 expands into a square block, the square block cooperates with the housing slide groove, so that the striking rod 4 can slide up and down but cannot rotate. The striking rod 4 is covered with a spring 5 on the outside, and the spring 5 is restricted between the lower part of the double helical block 1 and the lower square block of the striking rod 4, and an ampoule 8 is arranged below the lower part of the striking rod 4.

[0027] The working process of the injector is as follows: the control system starts the motor 6 to rotate, and after deceleration, it drives the double helical block drive shell 3 to rotate, and then drives the double helical block 1 to rotate. The sliding column 3 in contact with the double helical block 1 drives the striking rod 4 to slide upward. As the block at the bottom of the striking rod 4 moves upward, the spring 5 is compressed and stores energy. When the sliding column 4 slides to the highest point (top surface platform 13) of the spiral surface 12, the sliding column 3 can stop at the highest point according to the program, or continue to slide forward. After sliding past the highest point, the sliding column 3 that continues to slide forward quickly falls straight to the lowest point (bottom surface platform 11) of the spiral surface 12 under the elastic restoring force of the spring 5. As the sliding column 4 moves downward, the lower part of the striking rod 4 hits the injection push rod 7 of the ampoule 8, and the liquid medicine is injected out of the ampoule 8. According to the program, the motor 6 can stop running and wait for the next command. If the syringe is equipped with a continuous injection ampoule, the operating program can continue to rotate the motor 6, the slide column 4 in the syringe will be pushed to the highest point of the spiral surface 12, and then fall down to complete the next injection, and this cycle is repeated, thus implementing the function of electric continuous injection. Obviously, the syringe can be continuously injected, but the vibration problem caused by the spring 5 is not improved.

[0028] Please refer to 4-6. The present invention also provides another embodiment, using a double helical curved block spring offset combination, so that the needle-free syringe produced can reduce recoil and improve the vibration caused by the spring.

[0029] exist Figure 4 In the figure, the driving shaft of the motor 6 is directly connected to the middle part of the slide column 2, which can drive the slide column 2 to rotate. The two sides of the lower part of the double helical block 1 are symmetrically extended and connected to two double helical block slide bars 14. The inner side of the double helical block slide bar 14 is provided with a double helical block rack 15. The double helical block slide bar 14 cooperates with the corresponding double helical block slide groove 21 on the outer shell 19, so that the double helical block 1 can move up and down along the double helical block slide groove 21, but cannot rotate. The two double helical block racks 15 cooperate with the two intermediate gears 16 fixed on the outer shell 19, and then cooperate with the beater rack 18 on the beater 17. The beater 17 is a structure that cooperates with the double helical block 1, and a circular hole 23 of a certain depth is opened on the upper part thereof (such as Figure 6 As shown in the figure, the spring 9 can be accommodated, and the upper part of the spring 9 extends to the bottom of the double helical block 1. A spring support rod is provided in the center of the bottom of the double helical block 1, and its length is not greater than the length of the compressed spring 9. The bottom of the beater 17 is a closed structure, which can hit the ampoule push rod 7. Beater racks 18 are provided on both sides of the beater 17, which can cooperate with the intermediate gear 16. Beater slides 22 are also provided on both sides of the beater 17, and the beater slides 22 cooperate with the beater slide grooves 20 on the housing 19 and can slide up and down.

[0030] The actual working process of this embodiment is as follows: the initial position of the slide column 2 is at the lowest point of the double helical block 1. The control system rotates the motor 6, and through the reducer, the drive shaft of the motor 6 then drives the slide column 2 to rotate along the spiral surface 12 of the double helical block 1. The rotating slide column 2 presses the double helical block 1 down along the double helical block slide groove 21. At the same time, the downward-moving double helical block rack 15 passes through the intermediate gear 16 and then the beater rack 18, so that the beater 17 moves up, and the spring 9 between the double helical block 1 and the beater 17 is compressed and stores energy. After the slide column 2 passes over the highest point of the double helical block 1, the double helical block 1 moves straight up under the restoring force of the spring 9, and through the action of the intermediate gear 16, the beater rack 18 drives the beater 17 to move down, and then hits the injection push rod 7 of the ampoule 8 to complete the injection. According to the program setting, the syringe can stop working after completing a single injection; or according to the program setting, the motor 6 continues to rotate, allowing the syringe to complete multiple injections until the operator makes a stop control.

[0031] In summary, the present invention adopts the cooperation of the double helical block 1 and the slide column 2, so that the motor 6 can pressurize the spring once or continuously to store energy, release the spring energy, hit the ampoule push rod 7, and implement the needle-free single or continuous injection. When equipped with a double helical block spring hedging combination, the present invention can implement needle-free single or continuous injection in the presence of a small recoil force.

[0032] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A needle-free syringe containing a double helical block, characterized in that: It includes a double helical block, a sliding column, an elastic component, a push rod striking component, a motor, an ampoule, and an injection push rod arranged in the ampoule. The double helical block is a hollow cylinder, and two symmetrical spiral surfaces are milled out of the side wall. The elastic component is connected to the double helical block. The motor is used to drive the double helical block and the sliding column to move relative to each other. When the sliding column moves upward along the spiral surface of the double helical block, the elastic component stores energy. When the sliding column detaches from the spiral surface of the double helical block, the stored energy released by the elastic component is transmitted to the push rod striking component. The push rod striking component strikes the injection push rod in the ampoule to realize injection. It also includes a housing, the push rod striking assembly includes a striker, the striker has a round hole on the upper part and is closed at the lower part, the elastic assembly is a spring accommodated in the round hole, the driving shaft of the motor is connected to the middle part of the sliding column, the double helical block is provided with a double helical block rack, the striker is provided with a striker rack, the double helical block rack is meshed and connected with the striker rack through an intermediate gear fixed on the housing; the motor is used to drive the sliding column to rotate along the spiral surface of the double helical block, and the rotating sliding column presses the double helical block downward; The two sides of the lower part of the double helical curved block are symmetrically extended to connect two double helical curved block slide bars, and the double helical curved block slide bars cooperate with the corresponding double helical curved block slide grooves on the housing to achieve sliding connection; The double helical curved block rack is arranged on the inner side of the double helical curved block slide bar; Beater slide bars are arranged on both sides of the beater, and the beater slide bars cooperate with the beater slide grooves on the shell to slide up and down.

2. The needle-free syringe containing a double helical block according to claim 1, characterized in that: A bottom platform is provided at the lowest point on the spiral surface, and a top platform is provided at the highest point. The sliding column can stay on the bottom platform and the top platform. When the double spiral block and the sliding column move relative to each other, the sliding column starts from the bottom platform on one spiral surface, reaches the top platform of the spiral surface along the spiral surface, and then descends in a straight line to the bottom platform of the other spiral surface.

3. The needle-free syringe containing a double helical block according to claim 1, characterized in that: The motor is a brushed DC motor or a brushless motor.

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