Propelling device of micro-injection pump

Abstract

The utility model relates to the technical field of micro-injection pumps, and discloses a propelling device of a micro-injection pump, which comprises a fixed table and an injector positioned above the fixed table, and is characterized in that a main sliding groove and two first limiting grooves are formed in the upper side of the fixed table, and the two first limiting grooves are respectively positioned on two sides of the main sliding groove; wedge-shaped sliding blocks are slidably connected to the inner sides of the two first limiting grooves correspondingly, a plurality of second limiting holes are formed in one sides of the two wedge-shaped sliding blocks correspondingly, third limiting sliding rods are slidably connected to the multiple second limiting holes correspondingly, and an injector clamping mechanism for an injector is arranged on one sides of the multiple third limiting sliding rods; the two wedge-shaped sliding blocks are pushed to be close to each other through the wedge-shaped push plate, an injector is clamped and fixed through the arc-shaped limiting blocks on the two sides, the infusion precision of the device is improved, and high practical value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-injection pumps, in particular to a propulsion device of a micro-injection pump. Background Art

[0002] Micro-injection pumps can accurately, trace, evenly and continuously inject liquid medicine into the body. This operation is convenient, timed and quantitative, and the drug concentration and speed can be adjusted at any time according to the needs of the disease, so that the drug can maintain an effective blood concentration in the body. In the medical field, micro-injection pumps are often used to rescue critically ill patients. Micro-injection pumps can not only reduce the workload of nurses, but also improve work efficiency, and accurately, safely and effectively cooperate with doctors in rescue. The micro-injection pumps currently used in hospitals generally use a rotatable clamp to fix the syringe. This fixing method can easily cause the center of the push plate and the center of the syringe piston to be not in a straight line, resulting in uneven liquid injection.

[0003] For example, a Chinese utility model patent with announcement number CN210844667U discloses a micro-injection pump with a built-in protective cover. Although this solution can effectively prevent external collisions, accumulation of liquid medicine or entry of foreign matter from affecting the accuracy of the micro-injection pump, the way this syringe pressure plate fixes the syringe cannot achieve self-centering calibration together with the push head, and the unbalanced force on the push head may cause uneven liquid medicine input. Based on this, a propulsion device for a micro-injection pump with more balanced infusion is proposed. Utility Model Content

[0004] In order to solve the technical problem of a linear motor module cover, the utility model provides a propulsion device for a micro-injection pump.

[0005] The utility model is implemented by the following technical scheme: a propulsion device of a micro-injection pump, comprising a fixed platform and a syringe located above the fixed platform, a main slide groove and two first limit grooves are provided on the upper side of the fixed platform, the two first limit grooves are respectively located on both sides of the main slide groove, the inner sides of the two first limit grooves are slidably connected with a wedge-shaped slider, one side of the two wedge-shaped sliders are respectively provided with a plurality of second limit holes, the plurality of second limit holes are slidably connected with a third limit slide bar, one side of the plurality of third limit slide bars is provided with a syringe clamping mechanism for the syringe, one side of the fixed platform is provided with a wedge-shaped pushing mechanism for pushing the wedge slides on both sides to approach each other, one side of the wedge-shaped pushing mechanism is provided with a syringe buffer mechanism for facilitating the insertion of the syringe, and the other side of the wedge-shaped pushing mechanism is provided with a syringe driving mechanism for regulating the injection flow rate of the syringe.

[0006] As a further improvement of the above scheme, the syringe clamping mechanism includes a plurality of third limit slide rods located on one side of the main slide groove, one end of which is fixedly connected to an arc-shaped limit block slidably connected to the inner side of the main slide groove, and a second spring is arranged on the outer side of each of the plurality of third limit slide rods.

[0007] Through the above technical solution, the two arc-shaped limit blocks can be pushed from the side by the wedge-shaped sliding block to clamp and fix the syringe from both sides.

[0008] As a further improvement of the above scheme, the wedge-shaped pushing mechanism includes two second limiting grooves opened on the fixed platform, and the inner sides of the two second limiting grooves are respectively slidably connected with wedge-shaped push plates that cooperate with the wedge-shaped slider, and one end of the two wedge-shaped push plates is commonly fixedly connected with a threaded sleeve.

[0009] Through the above technical solution, through the wedge-shaped structure, each wedge-shaped push plate can push the wedge-shaped sliding blocks on both sides closer to each other, forming a clamping effect.

[0010] As a further improvement of the above scheme, the syringe buffer mechanism includes a first spring fixedly connected to one side of the threaded sleeve, one end of the first spring is fixedly connected to a push plate that cooperates with the syringe, a first limiting hole is opened on the threaded sleeve, and the inner side of the first limiting hole is slidably connected to a second limiting slide rod fixedly connected to one side of the push plate.

[0011] As a further improvement of the above scheme, the syringe drive mechanism includes a screw rod threadedly connected to one side of the threaded sleeve, one end of the screw rod is fixedly connected to a second speed gear, one side of the second speed gear is rotatably connected to a vertical plate, one side of the vertical plate is fixedly connected to a servo motor, and the output end of the servo motor is fixedly connected to a first limiting slide rod rotatably connected to the vertical plate and slidably connected to the lower side of the threaded sleeve, and the first limiting slide rod is provided with a first speed gear meshing with the second speed gear.

[0012] As a further improvement of the above solution, the lower side of the vertical plate and the lower side of the fixing platform are fixedly connected with a base.

[0013] Through the above technical solution, the first speed change gear can be driven to rotate by the servo motor, thereby pushing the threaded sleeve forward.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model clamps and fixes the syringe by pushing the arc-shaped limit blocks from both sides through the wedge-shaped slider, and the fixing accuracy is high. The fixed syringe can keep a straight line with the push plate, the thrust of the syringe is more balanced, and the infusion is more stable.

[0016] 2. The utility model drives the threaded sleeve to move along the first limit slide rod through a servo motor, first pushes the arc limit block to clamp the syringe from the side through the wedge-shaped push plate, and when the threaded sleeve continues to move forward, the push plate pushes the syringe from one end to squeeze out the liquid medicine, and the working efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of a propulsion device of a micro-injection pump provided by the utility model;

[0018] Figure 2 A top view of a propulsion device of a micro-injection pump provided by the utility model;

[0019] Figure 3 for Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0020] Description of main symbols:

[0021] 1. Wedge-shaped slider; 2. Wedge-shaped push plate; 3. First limit slide bar; 4. First speed gear; 5. Base; 6. Vertical plate; 7. Servo motor; 8. Second speed gear; 9. Screw; 10. Threaded sleeve; 11. First limit hole; 12. Second limit slide bar; 13. First spring; 14. Push plate; 15. First limit slot; 16. Second spring; 17. Second limit hole; 18. Main slide bar; 19. Syringe; 20. Arc limit block; 21. Second limit slot; 22. Fixed table; 23. Third limit slide bar. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0023] Embodiment 1:

[0024] Please combine Figure 1 and Figure 3A propulsion device of a micro-injection pump of the present embodiment includes a fixed platform 22 and a syringe 19 located above it. A main slide 18 and two first limiting grooves 15 are provided on the upper side of the fixed platform 22. The two first limiting grooves 15 are respectively located on both sides of the main slide 18. The inner sides of the two first limiting grooves 15 are slidably connected with a wedge-shaped slider 1. One side of the two wedge-shaped sliders 1 is respectively provided with a plurality of second limiting holes 17. The plurality of second limiting holes 17 are slidably connected with a third limiting slide bar 23. A syringe clamping mechanism for the syringe 19 is provided on one side of the plurality of third limiting slide bars 23. A wedge-shaped pushing mechanism for pushing the wedge-shaped sliders 1 on both sides to approach each other is provided on one side of the fixed platform 22. The wedge-shaped pushing mechanism One side of the mechanism is provided with a syringe buffer mechanism for facilitating the insertion of the syringe 19, and the other side of the wedge-shaped pushing mechanism is provided with a syringe driving mechanism for regulating the injection flow rate of the syringe 19. The syringe clamping mechanism includes a plurality of third limit slide bars 23 located on one side of the main slide groove 18, one end of which is commonly fixedly connected to an arc-shaped limit block 20 slidably connected to the inner side of the main slide groove 18, and the outer sides of the plurality of third limit slide bars 23 are each provided with a second spring 16. The wedge-shaped pushing mechanism includes two second limit grooves 21 opened on the fixed platform 22, and the inner sides of the two second limit grooves 21 are respectively slidably connected with a wedge-shaped push plate 2 cooperating with the wedge-shaped slider 1, and one end of the two wedge push plates 2 is commonly fixedly connected to a threaded sleeve 10.

[0025] The width of the main slide 18 is slightly larger than the length of the two arc-shaped limit blocks 20, leaving a certain distance, which cooperates with the buffering effect of the third limit slide rod 23 and the second spring 16 to facilitate the staff to place the syringe 19 therein, while avoiding excessive pressure generated by the two arc-shaped limit blocks 20 to damage the syringe 19.

[0026] Embodiment 2:

[0027] The improvement based on Example 1 is that: Figure 2 and Figure 3 As shown, the syringe buffer mechanism includes a first spring 13 fixedly connected to one side of the threaded sleeve 10, one end of the first spring 13 is fixedly connected to a push plate 14 matched with the syringe 19, a first limiting hole 11 is opened on the threaded sleeve 10, and a second limiting slide bar 12 fixedly connected to one side of the push plate 14 is slidably connected to the inner side of the first limiting hole 11, and the syringe drive mechanism includes a screw rod 9 threadedly sleeved on one side of the threaded sleeve 10, one end of the screw rod 9 is fixedly connected to a second speed change gear 8, one side of the second speed change gear 8 is rotatably connected to a vertical plate 6, one side of the vertical plate 6 is fixedly connected to a servo motor 7, the output end of the servo motor 7 is fixedly connected to a first limiting slide bar 3 rotatably connected to the vertical plate 6 and slidably connected to the lower side of the threaded sleeve 10, the first limiting slide bar 3 is provided with a first speed change gear 4 meshing with the second speed change gear 8, and the lower side of the vertical plate 6 and the lower side of the fixed platform 22 are jointly fixedly connected to a base 5.

[0028] The radius of the second speed gear 8 is greater than that of the first speed gear 4, which can reduce the rotational angular velocity of the screw rod 9 and the forward distance of the threaded sleeve 10 per unit time, thereby improving the infusion accuracy of the device. The length of the first spring 13 is appropriate, which is convenient for the user to insert the push head of the syringe 19 into it, and at the same time avoids the push plate 14 pushing the syringe 19 when the wedge-shaped slider 1 has not yet formed a clamping effect.

[0029] The implementation principle of a propulsion device of a micro-injection pump in the embodiment of the present application is as follows: the servo motor 7 is started, driving the first speed gear 4 to rotate, while engaging the second speed gear 8, the screw rod 9 drives the threaded sleeve 10 forward, and the wedge-shaped push plates 2 on both sides contact the wedge-shaped slider 1 along the direction of the second limit groove 21. Under the limiting action of the first limit groove 15, an extrusion effect is generated, pushing the wedge-shaped sliders 1 closer to each other, and then pushing the arc-shaped limit block 20 to clamp and fix the syringe 19 from both sides.

[0030] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A propulsion device for a microinjection pump, comprising a fixed platform (22) and a syringe (19) located above the fixed platform, characterized in that: A main slide groove (18) and two first limiting grooves (15) are provided on the upper side of the fixed platform (22), and the two first limiting grooves (15) are respectively located on both sides of the main slide groove (18), and the inner sides of the two first limiting grooves (15) are slidably connected with a wedge-shaped slider (1), and a plurality of second limiting holes (17) are respectively provided on one side of the two wedge-shaped sliders (1), and the plurality of second limiting holes (17) are slidably connected with a third limiting slide bar (23), and a syringe clamping mechanism for the syringe (19) is provided on one side of the plurality of third limiting slide bars (23), and a wedge-shaped pushing mechanism for pushing the wedge-shaped sliders (1) on both sides to approach each other is provided on one side of the fixed platform (22), and a syringe buffer mechanism for facilitating the insertion of the syringe (19) is provided on one side of the wedge-shaped pushing mechanism, and a syringe driving mechanism for regulating the injection flow rate of the syringe (19) is provided on the other side of the wedge-shaped pushing mechanism.

2. A propulsion device for a microinjection pump as claimed in claim 1, characterized in that: The syringe clamping mechanism comprises a plurality of third limit slide bars (23) located on one side of the main slide groove (18), one end of which is fixedly connected to an arc-shaped limit block (20) slidably connected to the inner side of the main slide groove (18), and a second spring (16) is arranged on the outer side of each of the plurality of third limit slide bars (23).

3. A propulsion device for a microinjection pump as claimed in claim 1, characterized in that: The wedge-shaped pushing mechanism comprises two second limiting grooves (21) formed on a fixed platform (22), the inner sides of the two second limiting grooves (21) are respectively slidably connected with a wedge-shaped push plate (2) cooperating with the wedge-shaped slider (1), and one end of the two wedge-shaped push plates (2) is commonly fixedly connected with a threaded sleeve (10).

4. A propulsion device for a microinjection pump as claimed in claim 3, characterized in that: The syringe buffer mechanism comprises a first spring (13) fixedly connected to one side of a threaded sleeve (10); one end of the first spring (13) is fixedly connected to a push plate (14) matched with the syringe (19); a first limiting hole (11) is provided on the threaded sleeve (10); the inner side of the first limiting hole (11) is slidably connected to a second limiting slide rod (12) fixedly connected to one side of the push plate (14).

5. A propulsion device for a microinjection pump as claimed in claim 3, characterized in that: The syringe drive mechanism comprises a screw rod (9) threadedly sleeved on one side of a threaded sleeve (10); one end of the screw rod (9) is fixedly connected to a second speed gear (8); one side of the second speed gear (8) is rotatably connected to a vertical plate (6); one side of the vertical plate (6) is fixedly connected to a servo motor (7); an output end of the servo motor (7) is fixedly connected to a first limit slide rod (3) rotatably connected to the vertical plate (6) and slidably connected to the lower side of the threaded sleeve (10); and a first speed gear (4) meshing with the second speed gear (8) is arranged on the first limit slide rod (3).

6. A propulsion device for a microinjection pump as claimed in claim 5, characterized in that: The lower side of the vertical plate (6) and the lower side of the fixing platform (22) are fixedly connected to a base (5).

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