A high-precision syringe pump

Abstract

This invention discloses a high-precision infusion pump, relating to the field of medical device technology. It includes: a base plate; a fixing block disposed at one end of the upper side of the base plate; a support seat disposed at the upper side of the base plate away from the fixing block, the fixing block and the support seat being connected by a guide post; a push seat with two sliding holes, a vertical hole at the bottom of the push seat, a vertical insert plate passing through the vertical hole, a vertical groove on the vertical insert plate, and a spring abutting the top of the vertical slider; a first sprocket on the fixing block, a second sprocket on the support seat, a motor fixedly connected below the base plate, a drive sprocket on the motor's output shaft, and a synchronous belt between the first and second sprockets passing through the vertical groove. This invention, by setting a push seat and a vertical insert plate on the push seat, ensures the accuracy of the infusion pump after long-term use. The bottom inner wall of the vertical groove and the vertical slider compress and clamp the synchronous belt, causing the push seat to move with the synchronous belt to complete the injection task.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a high-precision injection pump. Background Technology

[0002] An infusion pump is a common medical device that uses pulse signals to rotate a stepper motor. A lead screw converts this rotational motion into linear motion, which in turn drives the syringe plunger to deliver intravenous fluid. Infusion pumps can precisely, evenly, and continuously deliver fluids, strictly control the fluid volume, ensure optimal effective fluid concentration, and rationally adjust the fluid injection rate.

[0003] However, in the existing technology, when rotary motion is converted into linear motion by a lead screw, the threads of the lead screw and nut will suffer significant wear after long-term use, which will reduce the accuracy of the injection pump or even render it unusable.

[0004] Therefore, how to provide a high-precision injection pump that can adjust the accuracy of the injection pump after long-term use is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a high-precision injection pump, which aims to solve the problems in the background art mentioned above, and realize the ability to adjust the precision of the injection pump after long-term use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A high-precision injection pump includes: substrate; A fixing block is disposed at one end of the upper side of the substrate; A support base is disposed on the upper side of the base plate away from the fixing block. The fixing block and the support base are connected by guide posts, and two guide posts are provided and are parallel to each other. A push base is provided with two sliding holes, which are respectively fitted onto two guide posts and slidably connected to the guide posts. A vertical hole is provided at the bottom of the push base, through which a vertical insert plate is inserted. The top of the vertical insert plate extends out of the vertical hole. A vertical groove is provided on the vertical insert plate, and a vertical slider is slidably disposed in the vertical groove. Both ends of the vertical slider extend laterally out of the vertical groove and are connected to the inner wall of the vertical hole. A spring abuts against the top of the vertical slider, and the other end of the spring abuts against the top of the vertical groove. A synchronous belt is provided. A first sprocket is provided on the fixed block, and a second sprocket is provided on the support base. A motor is fixedly connected below the base plate. A drive sprocket is provided on the output shaft of the motor. The synchronous belt is sequentially wrapped around the first sprocket, the second sprocket, and the drive sprocket and connected end to end. The synchronous belt between the first sprocket and the second sprocket is parallel to the guide post. The synchronous belt between the first sprocket and the second sprocket passes through the vertical slide groove. The bottom inner wall of the vertical slide groove is in frictional contact with the bottom of the synchronous belt. The bottom of the vertical slider is in frictional contact with the top of the synchronous belt.

[0007] Furthermore, both the fixing block and the support base are provided with receiving holes, and each receiving hole is provided with a wheel axle. The wheel axle is perpendicular to the guide post, and a first sprocket and a second sprocket are rotatably connected to the wheel axle.

[0008] Furthermore, the support base is provided with a receiving groove for placing a syringe, the axis of the receiving groove is parallel to the axis of the guide post, a pressure plate is provided on the receiving groove, and a vertical threaded hole is provided on the support base on one side of the receiving groove. A vertical screw is vertically arranged in the vertical threaded hole, and the vertical screw vertically passes through the pressure plate, the threaded hole and the base plate in sequence. The vertical screw is rotatably connected to the pressure plate.

[0009] Furthermore, a stop plate is provided at the bottom of the vertical screw, and a spring is sleeved on the vertical screw located below the base plate. One end of the spring abuts against the stop plate, and the other end of the spring abuts against the bottom of the base plate.

[0010] Furthermore, a first fixing plate is provided on the side of the support base near the fixing block. The first fixing plate is provided with a V-shaped groove corresponding to the receiving groove position. A first perforated plate is provided perpendicularly at both ends of the first fixing plate. A first strip hole is provided on the first perforated plate. A first fixing screw is provided through the first strip hole. The first fixing screw is threaded through the first strip hole and connected to the side wall of the support base by a thread.

[0011] Furthermore, a second fixing plate is provided on the side of the push seat away from the fixing block. The second fixing plate is provided with a U-shaped groove corresponding to the receiving groove position. A second hole plate is provided perpendicularly at both ends of the second fixing plate. A second strip hole is provided on the second hole plate. A second fixing screw is provided through the second strip hole. The second fixing screw passes through the second strip hole and is threaded to the side wall of the push seat.

[0012] Furthermore, limit blocks are provided on the guide posts on both sides of the push seat. The limit blocks are C-shaped and sleeved on the guide posts. A vertical locking nut is threaded to one side of the opening of the limit block.

[0013] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a high-precision injection pump. By setting a push seat and a vertical insert plate on the push seat, during use, pushing the vertical insert plate vertically downwards separates the bottom inner wall of the vertical slide from the synchronous belt, thereby driving the motor to rotate the synchronous belt and adjust its position. This allows for adjustment of the synchronous belt position after prolonged use of the injection pump, thus ensuring the accuracy of the injection pump after long-term use. After the synchronous belt position is adjusted, the vertical insert plate is released. Under the action of the spring, the vertical insert plate moves upwards, and the bottom inner wall of the vertical slide and the vertical slider will re-press and clamp the synchronous belt, causing the push seat to move with the synchronous belt to complete the injection task. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This invention provides an overall structural diagram of a high-precision injection pump; Figure 2 An overall structural diagram of the first fixing plate of a high-precision injection pump provided by the present invention; Figure 3 A cross-sectional view of a high-precision injection pump provided by the present invention; Figure 4 A diagram showing the motor position of a high-precision injection pump provided by the present invention; Figure 5 This is a cross-sectional view of the vertical insert plate of a high-precision injection pump provided by the present invention.

[0016] Wherein: 1 is the base plate; 2 is the fixing block; 3 is the support base; 4 is the guide post; 5 is the push base; 6 is the vertical insert plate; 7 is the vertical slider; 8 is the spring; 9 is the synchronous belt; 10 is the first sprocket; 11 is the second sprocket; 12 is the motor; 13 is the drive sprocket; 14 is the wheel axle; 15 is the pressure plate; 16 is the vertical screw; 17 is the abutment plate; 18 is the sleeve spring; 19 is the first fixing plate; 20 is the first hole plate; 21 is the first fixing screw; 22 is the second fixing plate; 23 is the second hole plate; 24 is the second fixing screw; 25 is the limit block; 26 is the vertical locking nut. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] See Figure 1-5 This invention discloses a high-precision injection pump, comprising: Substrate 1; In this embodiment, a housing is disposed below substrate 1, and a control chip for controlling the injection pump is disposed in the housing. The control chip is equipped with a control system, which can control the motor 12 to rotate or stop, thereby controlling the operation of the injection pump. Substrate 1 is a horizontal plate and is disposed at the top of the housing.

[0019] Fixing block 1 is disposed at one end of the upper side of substrate 1. In this embodiment, a screw is provided at the bottom of fixing block 1. The screw passes through substrate 1 from bottom to top and is threaded to the bottom of fixing block 1. Two screws are provided at the bottom of fixing block 1. Fixing block 1 is fixedly connected to one end of guide post 4. Fixing block 1 is used to fix and support one end of two guide posts 4.

[0020] The support base 3 is located on the upper side of the base plate 1 away from the fixing block 1. The fixing block 1 and the support base 3 are connected by guide posts 4. There are two guide posts 4, which are parallel to each other. In this embodiment, the support base 3 is used to support the main body of the syringe. The main body of the syringe is detachably connected to the support base 3.

[0021] The push seat 5 has two sliding holes, which are respectively fitted onto two guide posts 4 and slidably connected to the guide posts 4. A vertical hole is provided at the bottom of the push seat 5, through which a vertical insert plate 6 is inserted. The top of the vertical insert plate 6 extends out of the vertical hole, and a vertical groove is provided on the vertical insert plate 6. A vertical slider 7 is slidably disposed within the vertical groove, with both ends of the vertical slider 7 extending laterally out of the vertical groove and connecting to the inner wall of the vertical hole. A spring 8 abuts against the top of the vertical slider 7, and the other end of the spring 8 abuts against the top of the vertical groove. In this embodiment, under normal operating conditions, the elastic force of the spring 8 pushes the vertical insert plate 6 downwards, causing the bottom inner wall of the vertical groove to press tightly against the lower side of the synchronous belt 9. This, combined with the vertical slider 7 clamping the synchronous belt 9, allows the push seat 5 and the synchronous belt 9 to be fixed together by friction. When the motor 12 drives the drive sprocket 13 to rotate, it can drive... The synchronous belt 9 moves axially along the guide post 4, thereby driving the push seat 5 to slide along the guide post 4, pushing the syringe piston to complete the quantitative injection operation. When the injection pump experiences transmission accuracy deviation after long-term use, or when the starting position of the push seat 5 needs to be recalibrated, simply press down on the top of the vertical insert plate 6 extending from the vertical hole, causing the vertical insert plate 6 to move downward along the vertical hole. At this time, the top of the vertical slide groove compresses the spring 8, and the bottom inner wall of the vertical slide groove separates from the lower surface of the synchronous belt 9. The friction between the synchronous belt 9 and the push seat 5 disappears. The position of the push seat 5 can be adjusted manually, or the position of the synchronous belt 9 can be adjusted by driving the motor 12 to idle. After adjustment, release the vertical insert plate 6, and the spring 8 pushes the vertical insert plate 6 to reset, re-clamping the synchronous belt 9. This allows for quick accuracy calibration without disassembling the equipment to replace transmission components. The operation is simple, the maintenance cost is low, and the injection accuracy can be guaranteed for a long time.

[0022] A synchronous belt 9 is attached to a fixed block 1, a first sprocket 10 is mounted on the fixed block 1, a second sprocket 11 is mounted on the support base 3, a motor 12 is fixedly connected below the base plate 1, and a drive sprocket 13 is mounted on the output shaft of the motor 12. The synchronous belt 9 is sequentially wrapped around the first sprocket 10, the second sprocket 11, and the drive sprocket 13 and connected end to end. The synchronous belt 9 between the first sprocket 10 and the second sprocket 11 is parallel to the guide post 4 and passes through a vertical groove. The bottom inner wall of the vertical groove is parallel to the guide post 4. The bottom of the synchronous belt 9 is frictionally connected, and the bottom of the vertical slider 7 is frictionally connected to the top of the synchronous belt 9. In this embodiment, when the drive motor 12 rotates and drives the drive sprocket 13 to rotate, the drive sprocket 13 will drive the synchronous belt 9 to rotate cyclically around the first sprocket 10 and the second sprocket 11 through meshing. At this time, the vertical insert plate 6 clamps the synchronous belt 9 under the action of the spring 8. The movement of the synchronous belt 9 will drive the vertical slider 7 and the push seat 5 to move along the guide post 4 through friction, thereby pushing the injection push rod to complete the quantitative injection operation. In this structure, when the synchronous belt 9 becomes slightly loose after long-term use and the cumulative error causes the injection accuracy to decrease, it is not necessary to disassemble the entire pump body to replace the synchronous belt 9 or other transmission parts. Only the initial position of the push seat 5 needs to be adjusted according to the operation described above to quickly complete the accuracy calibration. This not only reduces the time and material costs of equipment maintenance, but also allows the injection pump to maintain a high injection accuracy for a long time, meeting the needs of high-precision injection in medical and laboratory applications.

[0023] Both the fixing block 1 and the support base 3 are provided with receiving holes, and each receiving hole is provided with a wheel axle 14. The wheel axle 14 is perpendicular to the guide post 4. A first sprocket 10 and a second sprocket 11 are rotatably connected to the wheel axle 14. In this embodiment, both the first sprocket 10 and the second sprocket 11 can rotate freely around the corresponding wheel axle 14 to ensure that the synchronous belt 9 can maintain smooth circulation transmission and avoid jamming that affects the injection accuracy.

[0024] The support base 3 is provided with a receiving groove for placing a syringe. The axis of the receiving groove is parallel to the axis of the guide post 4. A pressure plate 15 is provided on the receiving groove. A vertical threaded hole is provided on the support base on one side of the receiving groove. A vertical screw 16 is vertically arranged in the vertical threaded hole. The vertical screw 16 vertically passes through the pressure plate 15, the threaded hole and the base plate 1 in sequence. The vertical screw 16 is rotatably connected to the pressure plate 15. In this embodiment, rotating the vertical screw 16 can drive the pressure plate 15 to rise and fall in the vertical direction, adapting to syringes of different diameters and fixing the syringes stably in the receiving groove, avoiding the syringe shaking and displacement during injection, which would affect the injection accuracy.

[0025] A stop plate 17 is provided at the bottom of the vertical screw 16. A sleeve spring 18 is sleeved on the vertical screw 16 located below the base plate 1. One end of the sleeve spring 18 abuts against the stop plate 17, and the other end of the sleeve spring 18 abuts against the bottom of the base plate 1. In this embodiment, the sleeve spring 18 can provide a stable preload for the vertical screw 16, which can prevent the vertical screw 16 from rotating unexpectedly during the operation of the equipment and ensure that the pressing state of the pressure plate 15 is stable and reliable.

[0026] A first fixing plate 19 is provided on the side of the support base 3 near the fixing block 1. The first fixing plate 19 has a V-shaped groove corresponding to the receiving groove position. The two ends of the first fixing plate 19 are respectively provided with a first perforated plate 20. The first perforated plate 20 has a first strip hole. A first fixing screw 21 is inserted through the first strip hole and threadedly connected to the side wall of the support base 3. In this embodiment, after loosening the first fixing screw 21, the front and rear positions of the first fixing plate 19 can be adjusted along the first strip hole to adapt to syringes of different lengths. After adjustment, tightening the screw will complete the fixation. The operation is simple and flexible.

[0027] A second fixing plate 22 is provided on the side of the push seat 5 away from the fixing block 1. The second fixing plate 22 has a U-shaped groove corresponding to the receiving groove position. The two ends of the second fixing plate 22 are respectively provided with second perforated plates 23 perpendicularly. The second perforated plates 23 have second strip holes. A second fixing screw 24 is inserted through the second strip hole and threadedly connected to the side wall of the push seat 5. In this embodiment, the U-shaped groove can support and limit the push handle of the syringe piston, so that the push seat 5 can stably push the piston to complete the injection operation. Loosening the second fixing screw 24 can adjust the extension position of the second fixing plate 22, which can be adapted to syringes of different lengths and different initial injection positions, making it more adaptable.

[0028] Limiting blocks 25 are provided on the guide posts 4 on both sides of the push seat 5. The limiting blocks 25 are C-shaped and sleeved on the guide posts 4. A vertical locking nut 26 is threaded to one side of the opening of the limiting block 25. In this embodiment, tightening the vertical locking nut 26 can fix the limiting block 25 in the designated position of the guide post 4, and loosening it can adjust the installation position of the limiting block 25, thereby limiting the sliding stroke of the push seat 5, adapting to the usage requirements of different injection ranges, and at the same time preventing the push seat 5 from running beyond its stroke, which could cause equipment damage or injection accidents.

[0029] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-precision injection pump, characterized in that, include: substrate; A fixing block is disposed at one end of the upper side of the substrate; A support base is disposed on the upper side of the base plate away from the fixing block. The fixing block and the support base are connected by guide posts, and two guide posts are provided and are parallel to each other. A push base is provided with two sliding holes, which are respectively fitted onto two guide posts and slidably connected to the guide posts. A vertical hole is provided at the bottom of the push base, through which a vertical insert plate is inserted. The top of the vertical insert plate extends out of the vertical hole. A vertical groove is provided on the vertical insert plate, and a vertical slider is slidably disposed in the vertical groove. Both ends of the vertical slider extend laterally out of the vertical groove and are connected to the inner wall of the vertical hole. A spring abuts against the top of the vertical slider, and the other end of the spring abuts against the top of the vertical groove. A synchronous belt is provided. A first sprocket is provided on the fixed block, and a second sprocket is provided on the support base. A motor is fixedly connected below the base plate. A drive sprocket is provided on the output shaft of the motor. The synchronous belt is sequentially wrapped around the first sprocket, the second sprocket, and the drive sprocket and connected end to end. The synchronous belt between the first sprocket and the second sprocket is parallel to the guide post. The synchronous belt between the first sprocket and the second sprocket passes through the vertical slide groove. The bottom inner wall of the vertical slide groove is in frictional contact with the bottom of the synchronous belt. The bottom of the vertical slider is in frictional contact with the top of the synchronous belt.

2. The high-precision injection pump according to claim 1, characterized in that, Both the fixing block and the support base are provided with receiving holes, and each receiving hole is provided with a wheel axle. The wheel axle is perpendicular to the guide post, and a first sprocket and a second sprocket are rotatably connected to the wheel axle.

3. A high-precision injection pump according to claim 1, characterized in that, The support base is provided with a receiving groove for placing a syringe. The axis of the receiving groove is parallel to the axis of the guide post. A pressure plate is provided on the receiving groove. A vertical threaded hole is provided on the support base on one side of the receiving groove. A vertical screw is vertically arranged in the vertical threaded hole. The vertical screw passes through the pressure plate, the threaded hole and the base plate in sequence. The vertical screw is rotatably connected to the pressure plate.

4. A high-precision injection pump according to claim 3, characterized in that, The bottom of the vertical screw is provided with an abutment plate, and a sleeve spring is sleeved on the vertical screw located below the base plate. One end of the sleeve spring abuts against the abutment plate, and the other end of the sleeve spring abuts against the bottom of the base plate.

5. A high-precision injection pump according to claim 3, characterized in that, A first fixing plate is provided on the side of the support base near the fixing block. The first fixing plate is provided with a V-shaped groove corresponding to the receiving groove. A first perforated plate is provided perpendicularly at both ends of the first fixing plate. A first strip hole is provided on the first perforated plate. A first fixing screw is passed through the first strip hole and threadedly connected to the side wall of the support base.

6. A high-precision injection pump according to claim 3, characterized in that, A second fixing plate is provided on the side of the push base away from the fixing block. The second fixing plate is provided with a U-shaped groove corresponding to the receiving groove. A second hole plate is provided perpendicularly at both ends of the second fixing plate. A second strip hole is provided on the second hole plate. A second fixing screw is passed through the second strip hole and threadedly connected to the side wall of the push base.

7. A high-precision injection pump according to claim 1, characterized in that, Limiting blocks are provided on the guide posts on both sides of the push seat. The limiting blocks are C-shaped and sleeved on the guide posts. A vertical locking nut is threaded to one side of the opening of the limiting block.

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