A portable single-channel micro-injection pump

Abstract

The present invention relates to the technical field of medical devices, and discloses a portable single-channel micro-injection pump, comprising a bottom plate, a working shell fixedly connected to the top of the bottom plate, a controller fixedly connected to the top of the working shell, a square hole opened on one side of the outer wall of the working shell, a staff member inserts the injection shell into the inner wall of the circular ring shell, the injection shell contacts the circular ring plate during movement, the injection shell squeezes the circular ring plate, the circular ring plate drives a rotating plate to move, and is limited by a fixed rod. During the process of the rotating plate driving a sliding block to move, the sliding block slides along the outer wall of the fixed rod, the fixed rod drives a clamping shell to move, the clamping shell drives a flexible clamping block to move, and the two flexible clamping blocks approach each other, thereby clamping the injection shell, preventing the injection shell from sliding during the injection process, improving the stability of the injection shell during injection, thereby accurately controlling the flow rate of the liquid and maintaining a stable liquid flow output.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a portable single-channel micro-injection pump. Background Art

[0002] A portable single-channel micro-injection pump is a medical device used to accurately control and deliver trace amounts of liquids or drugs. It usually needs to be designed to be light and compact, easy to move and carry, and needs to individually control the infusion speed and precise metering.

[0003] During the injection process, the syringe is usually slidably placed above the instrument, and then the liquid inside the syringe is squeezed and injected into the body. In this process, the syringe may slide slightly when being squeezed, or the squeezing force may cause the syringe to rotate, which will affect the infusion speed and the stability of the liquid flow rate. Summary of the invention

[0004] The object of the present invention is to provide a portable single-channel microinjection pump to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a portable single-channel micro-injection pump, comprising a base plate, a working shell fixedly connected to the top of the base plate, a controller fixedly connected to the top of the working shell, a square hole opened on one side of the outer wall of the working shell, and a micro-injection mechanism, the micro-injection mechanism comprising a motor fixedly connected to one side of the inner wall of the working shell, a cross bar fixedly connected to the inner wall side of the working shell close to the motor, a rotating shaft fixedly connected to the output end of the motor, a screw rod fixedly connected to the outer wall of the rotating shaft, a threaded plate threadedly connected to the outer wall of the screw rod, one side of the threaded plate penetrates and is slidably connected to the outer wall of the cross bar, and an injection assembly is arranged at one end of the threaded plate.

[0007] Furthermore, the injection assembly includes an extrusion plate fixedly connected to one end of the threaded plate, the outer wall of one end of the extrusion plate is slidably connected to the inner wall of the square hole, a fixed block is fixedly connected to one side of the outer wall of the working shell, the end of the fixed block away from the working shell is fixedly connected to a circular shell, the inner wall of the circular shell is slidably connected to an injection shell, the inner wall of the injection shell is slidably connected to an injection rod, and limiting holes are respectively opened at both ends of one side of the circular shell.

[0008] Furthermore, the inner cavity of the annular shell is provided with a stabilizing assembly, which includes a fixing rod fixedly connected to both sides of the inner wall of the annular shell, a sliding block slidably connected to the outer wall of one end of the fixing rod, and a rotating plate rotatably connected to one end of the sliding block.

[0009] Furthermore, one end of the rotating plate away from the sliding block is rotatably connected to a circular ring plate, the outer wall of one end of the rotating plate is slidably connected to the inner wall of the limiting hole, the outer wall of one end of the sliding block is slidably connected to the inner wall of the limiting hole, one side of the sliding block is fixedly connected to a tension spring, and the end of the tension spring away from the sliding block is fixedly connected to one side of the inner cavity of the circular ring shell.

[0010] Furthermore, the tension spring is arranged on the outside of the fixed rod, the end of the sliding block away from the rotating plate is fixedly connected to the clamping shell, the inner wall of the clamping shell is slidably connected to a flexible clamping block, one side of the flexible clamping block is fixedly connected to a conical spring, and the end of the conical spring away from the flexible clamping block is fixedly connected to one side of the inner wall of the clamping shell.

[0011] Furthermore, an auxiliary component is provided on one side of the clamping shell, and the auxiliary component includes a bent rod fixedly connected to one side of the outer wall of the clamping shell, one end of the side wall of the bent rod is hollowed out, one side of the inner wall of the bent rod is connected to a flexible suction cup, and the side of the flexible clamping block close to the conical spring is fixedly connected to an L-shaped rod.

[0012] Furthermore, one end of the L-shaped rod passes through the clamping shell and extends to the outside of the clamping shell, the side wall of one end of the L-shaped rod away from the flexible clamping block is fixedly connected to the piston rod, and the outer wall of one end of the piston rod is slidably connected to the inner wall of the bent rod.

[0013] Furthermore, the side wall of the clamping shell is provided with an anti-slip component, which includes a bent pipe connected to both sides of the clamping shell. There are twelve bent pipes, one side of the inner wall of the bent pipe is fixedly connected to a return spring, and one end of the return spring is fixedly connected to a sliding plate.

[0014] Furthermore, the outer wall of the sliding plate is slidably connected to the inner wall of the bent pipe, a connecting rod is fixedly connected to the side of the sliding plate away from the return spring, and a flexible anti-slip plate is fixedly connected to the end of the connecting rod away from the sliding plate, and the flexible anti-slip plate is arranged on the outside of the bent pipe.

[0015] The present invention has the following beneficial effects:

[0016] (1) In the present invention, the staff inserts the injection shell into the inner wall of the annular shell. During the movement of the injection shell, the injection shell contacts the annular plate, and the injection shell squeezes the annular plate. The annular plate drives the rotating plate to move. The rotating plate is limited by the fixed rod. During the movement of the sliding block driven by the rotating plate, the sliding block slides along the outer wall of the fixed rod. The fixed rod drives the clamping shell to move. The clamping shell drives the flexible clamping block to move. The two flexible clamping blocks approach each other, thereby clamping the injection shell to prevent the injection shell from sliding during the injection process, improving the stability of the injection shell during injection, thereby accurately controlling the flow rate of the liquid and maintaining a stable liquid The body flow is output, and the motor is started at this time. The motor drives the rotating shaft to rotate, and the rotating shaft drives the screw to rotate. Limited by the cross bar, the screw drives the threaded plate to move laterally during rotation, and the threaded plate drives the extrusion plate to move. During the movement of the extrusion plate, the injection rod is squeezed to move the injection rod toward the inside of the injection shell. During the movement of the injection rod, the liquid inside the injection shell enters the patient's body, and in the process of clamping the injection shell by the two flexible clamps, when the clamping force is too large, the flexible clamps will be slightly deformed to prevent the outer wall of the injection shell from being squeezed and deformed when the clamping force is too large, thereby improving the protection effect of the injection shell.

[0017] (2) In the present invention, during the movement of the clamping shell, the clamping shell drives the bent rod to move, and the bent rod drives the flexible suction cup to move. During the movement of the flexible suction cup, it will contact one side of the injection shell, further preventing the injection shell from sliding, improving the injection stability of the injection shell, and stabilizing the flow output of the liquid from the side. During the clamping process of the flexible clamp block, the flexible clamp block moves toward the inside of the clamping shell, further preventing the clamping force from being too large, and the flexible clamp block drives the L-shaped rod to move, and the L-shaped rod drives the piston rod to move, and the piston rod slides inside the bent rod, so that the piston rod is pulled out from the inside of the bent rod, generating a slight negative pressure inside the bent rod, and the negative pressure enters the inside of the flexible suction cup, causing the flexible suction cup to have an adsorption effect on the outer wall of the injection shell, thereby further improving the injection stability of the injection shell.

[0018] (3) According to the present invention, when the clamping shell drives the flexible clamping block to clamp the injection shell, the clamping shell drives the bent tube to move, the bent tube drives the sliding plate to move, the sliding plate drives the connecting rod to move, and the connecting rod drives the flexible anti-slip plate to move, so that the flexible anti-slip plate clamps the outer wall of the injection shell, thereby expanding the clamping range of the device on the injection shell, and laterally improving the injection stability of the injection shell. When the flexible clamping block moves toward the inside of the clamping shell, the air pressure inside the clamping shell enters the inside of the bent tube, and the air pressure causes the sliding plate inside the bent tube to slide, and the sliding plate drives the connecting rod to move, and the connecting rod drives the flexible anti-slip plate to move. During the movement of the flexible anti-slip plate, it will contact the outer wall of the injection shell. The extrusion force generated by the contact between the two causes the flexible anti-slip plate to undergo elastic deformation, so that the flexible anti-slip plate fits closer to the injection shell, which can prevent the injection shell from rotating around the annular shell during the injection process, and laterally improving the injection stability of the injection shell.

[0019] (4) According to the present invention, after the injection is completed, the clamping shell is pulled, and the clamping shell drives the bending rod to move, and the bending rod drives the flexible suction cup to move. During the movement of the flexible suction cup, the injection shell is no longer clamped, which facilitates the separation of the flexible suction cup from the injection shell. In addition, due to the elastic deformation of the conical spring, the conical spring causes the flexible clamping block to slide to the outside of the clamping shell, and the flexible clamping block drives the L-shaped rod to move, and the L-shaped rod drives the piston rod to move, causing the piston rod to slide to the inside of the bent rod, so that a slight air pressure is generated inside the bent rod, and the air pressure enters the inside of the flexible suction cup, so that the injection shell and the flexible suction cup are separated, thereby further improving the separation effect of the injection shell and the flexible suction cup, facilitating the replacement of the injection shell, and improving the subsequent cleaning of the injection shell.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall side structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the working shell of the present invention;

[0025] Figure 4This is a schematic cross-sectional view of the flexible clamping block of the present invention;

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of the injection shell of the present invention;

[0027] Figure 6 It is a schematic diagram of the side structure of the circular ring plate of the present invention;

[0028] Figure 7 For the present invention Figure 4 A magnified view of middle;

[0029] Figure 8 For the present invention Figure 5 Enlarged view of B.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] In the figure: 1, bottom plate; 2, working shell; 3, controller; 4, square hole; 5, microinjection mechanism; 51, motor; 52, cross bar; 53, rotating shaft; 54, screw rod; 55, threaded plate; 56, injection assembly; 57, stabilizing assembly; 58, auxiliary assembly; 59, anti-slip assembly; 561, extrusion plate; 562, injection rod; 563, fixing block; 564, annular shell; 565, injection shell; 566, Limiting hole; 571, annular plate; 572, rotating plate; 573, fixed rod; 574, sliding block; 575, tension spring; 576, clamping shell; 577, flexible clamping block; 578, conical spring; 581, bent rod; 582, flexible suction cup; 583, L-shaped rod; 584, piston rod; 591, bent pipe; 592, return spring; 593, sliding plate; 594, connecting rod; 595, flexible anti-skid plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1, please refer to Figure 1 - Figure 8 As shown, the present invention is a portable single-channel micro-injection pump, comprising a bottom plate 1, a working shell 2 is fixedly connected to the top of the bottom plate 1, a controller 3 is fixedly connected to the top of the working shell 2, a square hole 4 is opened on one side of the outer wall of the working shell 2, and further comprising;

[0034] The microinjection mechanism 5 includes a motor 51 fixedly connected to one side of the inner wall of the working shell 2, a cross bar 52 fixedly connected to one side of the inner wall of the working shell 2 close to the motor 51, a rotating shaft 53 fixedly connected to the output end of the motor 51, a screw rod 54 fixedly connected to the outer wall of the rotating shaft 53, a threaded plate 55 threadedly connected to the outer wall of the screw rod 54, one side of the threaded plate 55 penetrates and is slidably connected to the outer wall of the cross bar 52, the purpose of this arrangement is to prevent the threaded plate 55 from rotating, so that the threaded plate 55 reciprocates, and the threaded plate 55 An injection assembly 56 is provided at one end. The motor 51 is started, and the motor 51 drives the rotating shaft 53 to rotate. The rotating shaft 53 drives the screw rod 54 to rotate. The screw rod 54 is limited by the cross bar 52. During the rotation of the screw rod 54, the threaded plate 55 is driven to move laterally. The threaded plate 55 drives the extrusion plate 561 to move. During the movement of the extrusion plate 561, the injection rod 562 is squeezed, so that the injection rod 562 moves toward the inside of the injection shell 565. During the movement of the injection rod 562, the liquid inside the injection shell 565 enters the patient's body.

[0035] The injection assembly 56 includes an extrusion plate 561 fixedly connected to one end of the threaded plate 55, and the outer wall of one end of the extrusion plate 561 is slidably connected to the inner wall of the square hole 4. The purpose of this arrangement is to limit the movement of the extrusion plate 561. A fixed block 563 is fixedly connected to one side of the outer wall of the working shell 2, and the end of the fixed block 563 away from the working shell 2 is fixedly connected to a circular shell 564. The inner wall of the circular shell 564 is slidably connected to an injection shell 565, and the inner wall of the injection shell 565 is slidably connected to an injection rod 562. Limiting holes 566 are respectively provided at both ends of one side of the circular shell 564.

[0036] The inner cavity of the annular shell 564 is provided with a stabilizing assembly 57, which includes a fixing rod 573 fixedly connected to both sides of the inner wall of the annular shell 564, one end of the fixing rod 573 is slidably connected to the outer wall of the sliding block 574, and one end of the sliding block 574 is rotatably connected to a rotating plate 572.

[0037] The end of the rotating plate 572 away from the sliding block 574 is rotatably connected to the annular plate 571, and the outer wall of one end of the rotating plate 572 is slidably connected to the inner wall of the limiting hole 566. The purpose of this arrangement is to prevent the rotating plate 572 from getting stuck during rotation. The outer wall of one end of the sliding block 574 is slidably connected to the inner wall of the limiting hole 566. One side of the sliding block 574 is fixedly connected with a tension spring 575. The purpose of this arrangement is to facilitate resetting. The end of the tension spring 575 away from the sliding block 574 is fixedly connected to the inner cavity side of the annular shell 564.

[0038] The tension spring 575 is arranged on the outside of the fixed rod 573, and the end of the sliding block 574 away from the rotating plate 572 is fixedly connected to the clamping shell 576, and the inner wall of the clamping shell 576 is slidably connected to the flexible clamping block 577, and one side of the flexible clamping block 577 is fixedly connected to a conical spring 578, and the end of the conical spring 578 away from the flexible clamping block 577 is fixedly connected to one side of the inner wall of the clamping shell 576. The staff inserts the injection shell 565 into the inner wall of the annular shell 564, and the injection shell 565 contacts the annular plate 571 during the movement, and the injection shell 565 squeezes the annular plate 571. The rotating plate 572 is driven to move and is limited by the fixed rod 573. During the process of the rotating plate 572 driving the sliding block 574 to move, the sliding block 574 slides along the outer wall of the fixed rod 573. The fixed rod 573 drives the clamping shell 576 to move. The clamping shell 576 drives the flexible clamping block 577 to move. The two flexible clamping blocks 577 approach each other, thereby clamping the injection shell 565 to prevent the injection shell 565 from sliding during the injection process, thereby improving the stability of the injection shell 565 during injection, thereby accurately controlling the flow rate of the liquid and maintaining a stable liquid flow output.

[0039] In embodiment 2, an auxiliary component 58 is provided on one side of the clamping shell 576, and the auxiliary component 58 includes a bent rod 581 fixedly connected to one side of the outer wall of the clamping shell 576, and one end of the side wall of the bent rod 581 is hollowed out, and one side of the inner wall of the bent rod 581 is connected to a flexible suction cup 582. The purpose of this arrangement is to produce an adsorption effect, and an L-shaped rod 583 is fixedly connected to one side of the flexible clamping block 577 close to the conical spring 578.

[0040] One end of the L-shaped rod 583 passes through the clamping shell 576 and extends to the outside of the clamping shell 576. The side wall of the end of the L-shaped rod 583 away from the flexible clamping block 577 is fixedly connected to the piston rod 584. The outer wall of one end of the piston rod 584 is slidably connected to the inner wall of the curved rod 581. The flexible clamping block 577 drives the L-shaped rod 583 to move. The L-shaped rod 583 drives the piston rod 584 to move. The piston rod 584 slides inside the curved rod 581, so that the piston rod 584 is pulled out from the inside of the curved rod 581, so that a slight negative pressure is generated inside the curved rod 581. The negative pressure enters into the inside of the flexible suction cup 582, so that the flexible suction cup 582 has an adsorption effect on the outer wall of the injection shell 565, thereby further improving the injection stability of the injection shell 565.

[0041] The side wall of the clamping shell 576 is provided with an anti-slip component 59, and the anti-slip component 59 includes a bent pipe 591 connected on both sides of the clamping shell 576. There are twelve bent pipes 591, and a return spring 592 is fixedly connected to one side of the inner wall of the bent pipe 591. One end of the return spring 592 is fixedly connected to a sliding plate 593.

[0042] The outer wall of the sliding plate 593 is slidably connected to the inner wall of the curved tube 591. The sliding plate 593 is made of polytetrafluoroethylene, which has an extremely low friction coefficient and excellent chemical stability, is suitable for use in sliding contact, and can effectively prevent gas leakage. The side of the sliding plate 593 away from the return spring 592 is fixedly connected to a connecting rod 594, and the end of the connecting rod 594 away from the sliding plate 593 is fixedly connected to a flexible anti-slip plate 595. The material of the flexible anti-slip plate 595 is flexible and can be slightly deformed. The flexible anti-slip plate 595 is arranged on the outside of the curved tube 591. When the flexible clamping block 577 moves toward the inside of the clamping shell 576, The air pressure inside the clamping shell 576 enters the interior of the bent tube 591, and the air pressure causes the sliding plate 593 inside the bent tube 591 to slide, and the sliding plate 593 drives the connecting rod 594 to move, and the connecting rod 594 drives the flexible anti-slip plate 595 to move. During the movement, the flexible anti-slip plate 595 will come into contact with the outer wall of the injection shell 565. The extrusion pressure generated by the contact between the two causes the flexible anti-slip plate 595 to undergo elastic deformation, thereby making the flexible anti-slip plate 595 fit closer to the injection shell 565, which can prevent the injection shell 565 from rotating around the annular shell 564 during the injection process, thereby improving the injection stability of the injection shell 565.

[0043] During use, the staff inserts the injection shell 565 into the inner wall of the annular shell 564. During the movement of the injection shell 565, it contacts the annular plate 571. The injection shell 565 squeezes the annular plate 571, and the annular plate 571 drives the rotating plate 572 to move. The rotating plate 572 is limited by the fixed rod 573. During the movement of the sliding block 574 driven by the rotating plate 572, the sliding block 574 slides along the outer wall of the fixed rod 573. The fixed rod 573 drives the clamping shell 576 to move, and the clamping shell 576 drives the flexible clamping block 577 to move. The two flexible clamping blocks 577 approach each other, thereby clamping the injection shell 565 to prevent the injection shell 565 from sliding during the injection process, thereby improving the stability of the injection shell 565 during injection, thereby accurately controlling the flow rate of the liquid and maintaining stability. The motor 51 is started at this time, and the motor 51 drives the rotating shaft 53 to rotate, and the rotating shaft 53 drives the screw rod 54 to rotate. The screw rod 54 is limited by the cross bar 52, and the threaded plate 55 is driven to move laterally during the rotation of the screw rod 54, and the threaded plate 55 drives the extrusion plate 561 to move. During the movement of the extrusion plate 561, the injection rod 562 is squeezed to make the injection rod 562 move toward the inside of the injection shell 565. During the movement of the injection rod 562, the liquid inside the injection shell 565 enters the patient's body, and in the process of the two flexible clamping blocks 577 clamping the injection shell 565, when the clamping force is too large, the flexible clamping block 577 will be slightly deformed to prevent the outer wall of the injection shell 565 from being squeezed and deformed when the clamping force is too large, thereby improving the protection effect of the injection shell 565.

[0044] During the movement of the clamping shell 576, the clamping shell 576 drives the bent rod 581 to move, and the bent rod 581 drives the flexible suction cup 582 to move. During the movement, the flexible suction cup 582 will contact one side of the injection shell 565, further preventing the injection shell 565 from sliding, improving the injection stability of the injection shell 565, and stabilizing the flow output of the liquid from the side. During the clamping process of the flexible clamping block 577, the flexible clamping block 577 moves toward the inside of the clamping shell 576, further preventing the clamping force from being too large, and the flexible clamping block 577 drives the L-shaped rod 583 to move, and the L-shaped rod 583 drives the piston rod 584 to move, and the piston rod 584 slides inside the bent rod 581, so that the piston rod 584 will be pulled out inside the bent rod 581, so that a slight negative pressure is generated inside the bent rod 581, and the negative pressure enters the inside of the flexible suction cup 582, so that the flexible suction cup 582 has an adsorption effect on the outer wall of the injection shell 565, thereby further improving the injection stability of the injection shell 565.

[0045] When the clamping shell 576 drives the flexible clamping block 577 to clamp the injection shell 565, the clamping shell 576 drives the elbow 591 to move, the elbow 591 drives the sliding plate 593 to move, the sliding plate 593 drives the connecting rod 594 to move, and the connecting rod 594 drives the flexible anti-slip plate 595 to move, so that the flexible anti-slip plate 595 clamps the outer wall of the injection shell 565, thereby expanding the clamping range of the device on the injection shell 565, and improving the injection stability of the injection shell 565. When the flexible clamping block 577 moves toward the inside of the clamping shell 576, the air pressure inside the clamping shell 576 is increased. When entering the interior of the curved tube 591, the air pressure causes the sliding plate 593 inside the curved tube 591 to slide, and the sliding plate 593 drives the connecting rod 594 to move, and the connecting rod 594 drives the flexible anti-slip plate 595 to move. During the movement, the flexible anti-slip plate 595 will come into contact with the outer wall of the injection shell 565. The extrusion force generated by the contact between the two causes the flexible anti-slip plate 595 to undergo elastic deformation, thereby making the flexible anti-slip plate 595 fit closer to the injection shell 565, which can prevent the injection shell 565 from rotating around the annular shell 564 during the injection process, thereby improving the injection stability of the injection shell 565.

[0046] When the injection is completed, the clamping shell 576 is pulled, and the clamping shell 576 drives the bent rod 581 to move, and the bent rod 581 drives the flexible suction cup 582 to move. During the movement of the flexible suction cup 582, the injection shell 565 is no longer blocked, which is convenient for the flexible suction cup 582 to separate from the injection shell 565, and is elastically deformed by the conical spring 578. The conical spring 578 causes the flexible clamping block 577 to slide to the outside of the clamping shell 576, and the flexible clamping block 577 drives the L-shaped rod 583 to move, and the L-shaped rod 583 drives the piston rod 584 to move, so that the piston rod 584 slides toward the inside of the bent rod 581, so that a slight air pressure is generated inside the bent rod 581, and the air pressure enters the inside of the flexible suction cup 582, so that the injection shell 565 and the flexible suction cup 582 are separated, which further improves the separation effect of the injection shell 565 and the flexible suction cup 582, facilitates the replacement of the injection shell 565, and improves the subsequent cleaning of the injection shell 565.

[0047] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A portable single-channel microinjection pump, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a working shell (2), the top of the working shell (2) is fixedly connected to a controller (3), one side of the outer wall of the working shell (2) is provided with a square hole (4), and further comprises a microinjection mechanism (5), the microinjection mechanism (5) comprising a motor (51) fixedly connected to one side of the inner wall of the working shell (2), a cross bar (52) fixedly connected to one side of the inner wall of the working shell (2) close to the motor (51), an output end of the motor (51) is fixedly connected to a rotating shaft (53), an outer wall of the rotating shaft (53) is fixedly connected to a lead screw (54), an outer wall of the lead screw (54) is threadedly connected to a threaded plate (55), one side of the threaded plate (55) is threadedly connected to The threaded plate (55) is slidably connected to the outer wall of the cross bar (52); an injection assembly (56) is provided at one end of the threaded plate (55); the injection assembly (56) comprises an extrusion plate (561) fixedly connected to one end of the threaded plate (55); the outer wall of one end of the extrusion plate (561) is slidably connected to the inner wall of the square hole (4); a fixing block (563) is fixedly connected to one side of the outer wall of the working shell (2); an end of the fixing block (563) away from the working shell (2) is fixedly connected to an annular shell (564); an injection shell (565) is slidably connected to the inner wall of the annular shell (564); the injection rod (562) is slidably connected to the inner wall of the injection shell (565); one side of the annular shell (564) Limiting holes (566) are respectively provided at both ends; the inner cavity of the annular shell (564) is provided with a stabilizing component (57), and the stabilizing component (57) includes a fixing rod (573) fixedly connected to both sides of the inner wall of the annular shell (564), the outer wall of one end of the fixing rod (573) is slidably connected to a sliding block (574), and one end of the sliding block (574) is rotatably connected to a rotating plate (572); the end of the rotating plate (572) away from the sliding block (574) is rotatably connected to a circular plate (571), the outer wall of one end of the rotating plate (572) is slidably connected to the inner wall of the limiting hole (566), and the outer wall of one end of the sliding block (574) is slidably connected to the limiting hole (5 66), one side of the sliding block (574) is fixedly connected to a tension spring (575), and one end of the tension spring (575) away from the sliding block (574) is fixedly connected to one side of the inner cavity of the annular shell (564); the tension spring (575) is arranged on the outside of the fixed rod (573), one end of the sliding block (574) away from the rotating plate (572) is fixedly connected to a clamping shell (576), the inner wall of the clamping shell (576) is slidably connected to a flexible clamping block (577), one side of the flexible clamping block (577) is fixedly connected to a conical spring (578), and one end of the conical spring (578) away from the flexible clamping block (577) is fixedly connected to one side of the inner wall of the clamping shell (576);The staff inserts the injection shell (565) into the inner wall of the annular shell (564). During the movement of the injection shell (565), the injection shell (565) contacts the annular plate (571). The injection shell (565) squeezes the annular plate (571). The annular plate (571) drives the rotating plate (572) to move. The rotating plate (572) drives the sliding block (574) to move, and the sliding block (574) slides along the outer wall of the fixed rod (573). The fixed rod (573) drives the clamping shell (576) to move. The clamping shell (576) drives the flexible clamping block (577) to move. The two flexible clamping blocks (577) move closer to each other, thereby clamping the injection shell (565). The flexible clamping blocks (577) are provided with an auxiliary component (58) on one side of the clamping shell (576), and the auxiliary component (58) includes a bent rod (581) fixedly connected to one side of the outer wall of the clamping shell (576), and one end of the side wall of the bent rod (581) is hollowed out, and one side of the inner wall of the bent rod (581) is connected to a flexible suction cup (582), and the flexible clamping block (577) is close to the conical spring (5 78) is fixedly connected to one side of the clamping shell (576); during the movement of the clamping shell (576), the clamping shell (576) drives the bending rod (581) to move, and the bending rod (581) drives the flexible suction cup (582) to move. During the movement of the flexible suction cup (582), it will contact one side of the injection shell (565), further preventing the injection shell (565) from sliding, improving the injection stability of the injection shell (565), and stabilizing the flow output of the liquid on the side. During the clamping process of the flexible clamping block (577), the flexible clamping block (577) moves toward the inside of the clamping shell (576), further preventing the clamping force from being too large, and the flexible clamping block (577) drives the L-shaped rod (583) to move. The L-shaped rod (583) drives the piston rod (584) to move, and the piston rod (584) slides inside the curved rod (581), so that the piston rod (584) is pulled out from the curved rod (581), so that a slight negative pressure is generated inside the curved rod (581), and the negative pressure enters the inside of the flexible suction cup (582), so that the flexible suction cup (582) adsorbs the outer wall of the injection shell (565); one end of the L-shaped rod (583) passes through the clamping shell (576) and extends to the outside of the clamping shell (576), and the side wall of one end of the L-shaped rod (583) away from the flexible clamping block (577) is fixedly connected with the piston rod (584), and the outer wall of one end of the piston rod (584) is slidably connected to the inner wall of the curved rod (581);The side wall of the clamping shell (576) is provided with an anti-slip component (59), and the anti-slip component (59) includes a curved tube (591) connected to both sides of the clamping shell (576), and twelve curved tubes (591) are provided. A return spring (592) is fixedly connected to one side of the inner wall of the curved tube (591), and a sliding plate (593) is fixedly connected to one end of the return spring (592); the outer wall of the sliding plate (593) is slidably connected to the inner wall of the curved tube (591), and the sliding plate (593) is away from the return spring (592). One side is fixedly connected to a connecting rod (594), and one end of the connecting rod (594) away from the sliding plate (593) is fixedly connected to a flexible anti-slip plate (595), and the flexible anti-slip plate (595) is arranged outside the curved tube (591); when the clamping shell (576) drives the flexible clamping block (577) to clamp the injection shell (565), the clamping shell (576) drives the curved tube (591) to move, the curved tube (591) drives the sliding plate (593) to move, and the sliding plate (593) drives the connecting rod (594) to move, and the connecting rod (594) drives the sliding plate (593) to move. The connecting rod (594) drives the flexible anti-slide plate (595) to move, so that the flexible anti-slide plate (595) clamps the outer wall of the injection shell (565), thereby expanding the clamping range of the device on the injection shell (565) and improving the injection stability of the injection shell (565). When the flexible clamping block (577) moves toward the inside of the clamping shell (576), the air pressure inside the clamping shell (576) enters the inside of the bent pipe (591), and the air pressure causes the sliding plate (593) inside the bent pipe (591) to slide, and the sliding plate (593) The connecting rod (594) is driven to move, and the connecting rod (594) drives the flexible anti-slide plate (595) to move. During the movement of the flexible anti-slide plate (595), the flexible anti-slide plate (595) contacts the outer wall of the injection shell (565). The squeezing force generated by the contact between the two causes the flexible anti-slide plate (595) to undergo elastic deformation, thereby making the flexible anti-slide plate (595) and the injection shell (565) fit closer, thereby preventing the injection shell (565) from rotating around the annular shell (564) during the injection process, and improving the injection stability of the injection shell (565).When the injection is completed, the clamping shell (576) is pulled, and the clamping shell (576) drives the bending rod (581) to move, and the bending rod (581) drives the flexible suction cup (582) to move. During the movement of the flexible suction cup (582), the injection shell (565) is no longer blocked, so that the flexible suction cup (582) and the injection shell (565) are separated. The conical spring (578) is elastically deformed, and the conical spring (578) causes the flexible clamping block (577) to slide to the outside of the clamping shell (576), and the flexible clamping block (577) is moved to the outside of the clamping shell (576). The block (577) drives the L-shaped rod (583) to move, and the L-shaped rod (583) drives the piston rod (584) to move, so that the piston rod (584) slides toward the inside of the bent rod (581), so that a slight air pressure is generated inside the bent rod (581), and the air pressure enters the inside of the flexible suction cup (582), so that the injection shell (565) and the flexible suction cup (582) are separated, further improving the separation effect of the injection shell (565) and the flexible suction cup (582), and facilitating the replacement of the injection shell (565). ;

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