External injector power equipment

Abstract

The utility model discloses external injector power equipment, which belongs to medical instruments and comprises an injector fixing structure and a linear motion executing structure, an injector is detachably connected with the injector fixing structure, and the injector fixing structure and the linear motion executing structure are sequentially connected along the axial direction of the injector. A linear transmission mechanism in the linear motion execution structure is detachably connected with the tail part of a piston core rod of the injector, and the linear transmission mechanism in the linear motion execution structure pushes the piston core rod to do linear reciprocating motion in a needle cylinder of the injector. When human body injection is needed, the syringe is a disposable syringe, and a new disposable syringe is replaced on the syringe fixing structure after injection is finished, so that the injection safety requirement of a human body is met, and the problem of cross infection or occupational exposure is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices and relates to an external syringe power device. Background Art

[0002] At present, in the medical field, an injection pump is generally used to accurately and quantitatively extract or inject drugs. In the existing injection pump, the structure for storing and outputting liquid is a pump body with a hose, which is equivalent to a syringe. For the specific structure, reference can be made to CN201821027674.0, a stepping motor screw-driven double-guide rod directional column type injection pump device. This pump body is a part of the injection pump, with a high replacement difficulty and is suitable for repeated long-term use. Its use safety cannot meet the requirements of human injection; for human injection, in order to avoid cross-infection or occupational exposure, disposable syringes need to be used. Therefore, there is currently a lack of an injection device that meets the requirements of human injection and is convenient for replacing syringes. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an external syringe power device, which solves the problem that there is currently a lack of an injection device that meets the requirements of human injection and is convenient for replacing syringes.

[0004] The technical solution adopted by the utility model is as follows:

[0005] The external syringe power device includes a syringe fixing structure and a linear motion execution structure. The syringe is detachably connected to the syringe fixing structure. The syringe fixing structure and the linear motion execution structure are sequentially connected along the axial direction of the syringe. The linear transmission mechanism in the linear motion execution structure is detachably connected to the tail of the piston rod of the syringe, and the linear transmission mechanism in the linear motion execution structure pushes the piston rod to perform a linear reciprocating motion in the syringe barrel.

[0006] The utility model designs a syringe power device that can be applied to different syringes. The corresponding model of syringe to be used is clamped by the syringe fixing structure, and then the piston rod of the syringe is pushed and pulled by the linear motion execution structure to realize the quantitative extraction or injection of the syringe; when the corresponding model of syringe is clamped on the syringe fixing structure of the utility model, it can directly replace the existing injection pump for use; when human injection is not required, a reusable syringe, such as a quartz syringe, can be used for the syringe; when human injection is required, a disposable syringe is used for the syringe. After the injection is completed, a new disposable syringe is replaced on the syringe fixing structure to meet the injection safety requirements of the human body and avoid the problems of cross-infection or occupational exposure.

[0007] In the present utility model, the syringe fixing structure can adopt structures such as pipe clamps, buckles, and chucks to clamp and fix the syringe. The syringe is detachably connected to structures such as pipe clamps, buckles, and chucks; the pipe clamps, buckles, and chucks are all existing structures.

[0008] In the present utility model, the linear motion execution structure includes structures such as a lead screw driven by a motor, an electric cylinder, and an electric telescopic rod that can perform linear reciprocating motion driven by electricity. The linear transmission mechanism of the linear motion execution structure is detachably connected to the tail of the piston core rod of the syringe. The detachable connection method can be magnetic connection, snap connection, or adsorption connection. The linear transmission mechanism is the lead screw in the lead screw, electric telescopic rod, the lead screw in the electric cylinder, or the sliding guide rail. The driving structures of the lead screw driven by the motor, the electric cylinder, and the electric telescopic rod are generally motors. The motor drives the linear transmission mechanism to push and pull the piston core rod of the syringe, thereby realizing the quantitative extraction or injection of the syringe.

[0009] Further, the syringe fixing structure includes a support frame, the support frame is fixedly connected to one end face of the linear motion execution structure, and at least one buckle is installed on the support frame. The syringe is snap-connected to the buckle.

[0010] In the present utility model, the support frame plays a supporting role for the buckle, and the buckle is used to install the syringe. The existing common buckle is a plastic arc plate provided with a C-shaped card slot. The syringe is directly pressed into the C-shaped card slot of the plastic arc plate. Utilizing the micro-elasticity of the plastic arc plate, an interference fit between the plastic arc plate and the syringe barrel is realized, and then the plastic arc plate clamps the syringe tightly; by pulling the syringe forcefully towards the side away from the card slot of the plastic arc plate, the disassembly of the syringe from the plastic arc plate can be realized.

[0011] Further, a plurality of buckles are installed on the support frame, and all the buckles are arranged in sequence along the axial direction of the syringe. The syringe is snap-connected to all the buckles.

[0012] Further, the syringe fixing structure includes at least one pipe clamp that matches the shape and size of the syringe barrel. The syringe is clamped on the pipe clamp, and the pipe clamp is fixedly connected to the corresponding position of the linear motion execution structure through the support frame.

[0013] The pipe clamp is an existing structure, such as a double-row bolt pipe clamp, which can clamp the cylindrical syringe barrel.

[0014] Further, the syringe fixing structure includes at least one chuck that matches the shape and size of the syringe barrel. The syringe passes through the chuck and is snap-connected to the chuck. The chuck is fixedly connected to the corresponding position of the linear motion execution structure through the support frame.

[0015] The hollow two-jaw or multi-jaw chucks in the prior art can be used to clamp the syringe, which is convenient to use and facilitates the disassembly and assembly of the syringe.

[0016] Furthermore, the linear motion execution structure includes a hollow outer shell. The syringe fixing structure is fixedly connected to the front end face of the outer shell. A lead screw is installed inside the outer shell. The lead screw is the linear transmission mechanism of the linear motion execution structure. The central axis of the lead screw is parallel to the central axis of the syringe, and one end of the lead screw passes through the outer shell and is detachably connected to the tail of the piston rod of the syringe. The other end of the lead screw is equipped with a motor for driving the lead screw, and the motor is fixedly connected to the rear end of the outer shell. Driven by the motor, the lead screw drives the piston rod of the syringe to perform a linear reciprocating motion inside the syringe barrel.

[0017] In the present utility model, the outer shell is the support structure of the linear motion execution structure. The syringe fixing structure is fixedly connected to the outer shell. Driven by the motor, the lead screw drives the piston rod of the syringe to perform a linear reciprocating motion inside the syringe barrel, completing the quantitative extraction or injection of the syringe.

[0018] Furthermore, a clamping block is installed on one end of the lead screw. A clamping groove matching the shape of the tail of the piston rod of the syringe is provided on the clamping block. The lead screw is detachably connected to the tail of the piston rod of the syringe through the clamping block.

[0019] The clamping block in the present utility model is similar to the aforementioned snap structure. Only the clamping groove opened on the clamping block matches the shape of the tail of the piston rod. The clamping block in the present utility model is generally used in cooperation with the aforementioned snap. The notch openings of both are on the same side. By directly pressing the syringe into the clamping grooves of the clamping block and the snap, the connection and fixation between the syringe barrel and the syringe fixing structure and the connection and fixation between the tail of the piston rod of the syringe and the lead screw can be achieved.

[0020] Furthermore, the linear motion execution structure is a micro servo electric cylinder. The linear transmission mechanism of the micro servo electric cylinder is detachably connected to the tail of the piston rod of the syringe. The micro servo electric cylinder drives the piston rod to perform a linear reciprocating motion inside the syringe barrel through the linear transmission mechanism. The linear transmission mechanism includes one of a trapezoidal lead screw, a ball screw, and a roller screw.

[0021] Furthermore, the linear motion execution structure is an electric telescopic rod. The guide rod of the electric telescopic rod is the linear transmission mechanism of the linear motion execution structure. The guide rod of the electric telescopic rod is detachably connected to the tail of the piston rod of the syringe.

[0022] Furthermore, the linear transmission mechanism in the linear motion execution structure and the tail of the piston rod of the syringe are detachably connected through adsorption connection, clamping connection, or magnetic connection.

[0023] The adsorption connection is to install a suction cup on the linear drive mechanism. The linear drive mechanism is detachably connected to the tail of the piston core rod of the syringe by adsorbing the tail of the piston core rod of the syringe through the suction cup. The suction cup can be a rubber suction cup or an electromagnetic suction cup. If an electromagnetic suction cup is used, a structure such as an iron sheet that can be adsorbed by the electromagnetic suction cup needs to be installed at the tail of the piston core rod; the clamping connection includes clamping and fixing through a pipe clamp, a buckle, a clamping groove, a chuck, etc.; the magnetic connection between the linear drive mechanism and the tail of the piston core rod of the syringe is realized by installing mutually attracting magnets on the linear drive mechanism and the tail of the piston core rod of the syringe respectively.

[0024] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0025] 1. The syringe fixing structure of the external syringe power device clamps the corresponding model syringe to be used, and then pushes and pulls the piston core rod of the syringe through the linear motion execution structure to realize the quantitative extraction or injection of the syringe; clamping the corresponding model syringe on the syringe fixing structure of the present utility model can directly replace the existing injection pump; when human injection is required, a disposable syringe is used for the syringe, and a new disposable syringe is replaced on the syringe fixing structure after the injection is completed, meeting the injection safety requirements of the human body and avoiding problems such as cross-infection or occupational exposure.

[0026] 2. In the present utility model, the syringe fixing structure can adopt structures such as a pipe clamp, a buckle, a chuck, etc. to clamp and fix the syringe, and the syringe is detachably connected to structures such as a pipe clamp, a buckle, a chuck, etc.; the linear motion execution structure includes structures such as a lead screw driven by a motor, an electric cylinder, an electric telescopic rod, etc. that can perform linear reciprocating motion driven by electricity. The syringe fixing structure and the linear motion execution structure can adopt a variety of structures, with a wide selection range and being applicable to a variety of usage environments. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings, where:

[0028] Figure 1 is the external structure schematic diagram of the external syringe power device of the present utility model;

[0029] Figure 2 is the three-dimensional view of the present utility model;

[0030] Figure 3 is the schematic diagram of the motor structure of the present utility model;

[0031] Figure 4 is a schematic diagram of the inner structure of the present utility model;

[0032] Figure 5 is a schematic diagram of the structure of the syringe of the present utility model.

[0033] Reference numerals in the figure: 1 - syringe fixing structure, 2 - linear motion execution structure, 3 - syringe, 11 - support frame, 12 - buckle, 21 - housing, 22 - lead screw, 23 - motor, 24 - clamping block, 31 - piston core rod, 32 - finger hanging part. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings herein is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0036] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0037] The features and performance of the present utility model will be further described in detail below with reference to the embodiments.

[0038] Embodiment 1

[0039] As Figures 1 - 5As shown in the figure, the external syringe power device provided by the preferred embodiment of the present utility model includes a syringe fixing structure 1 and a linear motion execution structure 2. The syringe 3 is detachably connected to the syringe fixing structure 1. The syringe fixing structure 1 and the linear motion execution structure 2 are sequentially connected along the axial direction of the syringe 3. The linear transmission mechanism in the linear motion execution structure 2 is detachably connected to the tail of the piston rod of the syringe 3, and the linear transmission mechanism in the linear motion execution structure 2 pushes the piston rod 31 in the syringe barrel of the syringe 3 to perform a linear reciprocating motion. The connection point between the syringe 3 and the syringe fixing structure 1 can be the barrel wall of the syringe barrel or the finger hook portion 32 of the syringe barrel.

[0040] The syringe fixing structure 1 includes a support frame 11. The support frame 11 is fixedly connected to one end face of the linear motion execution structure 2. At least one buckle 12 is installed on the support frame 11, and the syringe 3 is snap-connected to the buckle 12.

[0041] A plurality of buckles 12 are installed on the support frame 11. All the buckles 12 are arranged sequentially along the axial direction of the syringe 3, and the syringe 3 is snap-connected to all the buckles 12.

[0042] The linear motion execution structure 2 includes a hollow outer shell 21. The syringe fixing structure 1 is fixedly connected to the front end face of the outer shell 21. A lead screw 22 is installed inside the outer shell 21. The lead screw 22 is the linear transmission mechanism of the linear motion execution structure 2. The central axis of the lead screw 22 is parallel to the central axis of the syringe 3, and one end of the lead screw 22 passes through the outer shell 21 and is detachably connected to the tail of the piston rod of the syringe 3. The other end of the lead screw 22 is installed with a motor 23 for driving the lead screw 22. The motor 23 is fixedly connected to the rear end of the outer shell 21. Driven by the motor 23, the lead screw 22 drives the piston rod of the syringe 3 to perform a linear reciprocating motion in the syringe barrel of the syringe 3.

[0043] A block 24 is installed at one end of the lead screw 22. A slot matching the shape of the tail of the piston rod of the syringe 3 is provided on the block 24. The lead screw 22 is detachably connected to the tail of the piston rod of the syringe 3 through the block 24.

[0044] In this embodiment, the block and the buckle are used in cooperation. The slot opening of the slot of the block and the slot opening of the buckle are on the same side. By directly pressing the syringe into the slots of the block and the buckle, the connection and fixation of the syringe barrel and the syringe fixing structure and the connection and fixation of the tail of the piston rod of the syringe and the lead screw can be realized.

[0045] The implementation method of the present utility model is as follows: Adjust the position of the screw rod, adjust the chuck at the front end of the screw rod to a suitable position, then press the syringe on the buckle and the chuck. The syringe barrel is fixed on the buckle, and the tail of the piston rod of the syringe is fixed on the chuck. Subsequently, driven by the motor 23, the screw rod 22 drives the piston rod of the syringe 3 to perform a linear reciprocating motion inside the syringe barrel of the syringe 3, completing the quantitative extraction or injection of the drug by the syringe. After the injection is completed, remove the syringe on the buckle and the chuck, and replace it with a new syringe to perform the next quantitative extraction or injection of the drug. In the present utility model, it is suitable for using a disposable syringe to meet the safety requirements of human injection and replaces the existing traditional injection pump.

[0046] Embodiment 2

[0047] Based on Embodiment 1, the difference from Embodiment 1 is that in this embodiment, the linear motion execution structure 2 is a micro servo cylinder. The linear transmission mechanism of the micro servo cylinder is detachably connected to the tail of the piston rod of the syringe 3. The micro servo cylinder drives the piston rod to perform a linear reciprocating motion inside the syringe barrel of the syringe 3 through the linear transmission mechanism; the linear transmission mechanism includes one of a trapezoidal screw rod, a ball screw rod, and a roller screw rod.

[0048] Taking the ball screw rod as an example, the micro servo cylinder mainly consists of the following parts:

[0049] Motor: The driving source of the servo cylinder, providing rotational power;

[0050] Reducer: Used to convert the high rotational speed of the motor into a low rotational speed suitable for linear motion, and at the same time increase the output torque;

[0051] Ball screw: The ball screw converts the rotational motion of the motor into linear motion;

[0052] Sliding guide: The sliding guide provides support and guidance for linear motion, ensuring that the ball screw or actuator moves stably and accurately in the linear direction;

[0053] Encoder (or other sensors): Used to monitor information such as the position, speed, and direction of the actuator in real time and feedback this data to the controller.

[0054] Controller: Receives the feedback signal from the encoder, calculates and outputs a control signal to the motor according to the preset target position and current position information through a control algorithm (such as PID control), thereby precisely controlling the motion of the actuator.

[0055] The working process of the micro servo electric cylinder is as follows: After the system is powered on, the controller reads the initial position information of the encoder as the reference point; Receive instructions: The controller receives instructions from the host computer or other control devices, including the target position, speed, etc.; Calculate and output: The controller calculates the rotation speed and direction that the motor should take through the control algorithm based on the target position and the current position information, and outputs a control signal to the motor; Execute and feedback: The motor starts to rotate according to the control signal. After being decelerated by the reducer, it drives the ball screw to move linearly on the sliding guide; During the linear movement of the ball screw, the piston core rod is driven to make a linear reciprocating movement in the syringe barrel of the syringe 3.

[0056] The micro servo electric cylinder is an existing technology. The present utility model does not make any improvements to the micro servo electric cylinder, and uses the micro servo electric cylinder to realize the linear reciprocating movement of the piston core rod.

[0057] The linear transmission mechanism (such as a ball screw) in the linear motion execution structure 2 is detachably connected to the tail of the piston core rod of the syringe 3 through adsorption connection, clamping connection or magnetic connection.

[0058] For the adsorption connection, a suction cup is installed on the linear transmission mechanism. The linear transmission mechanism is detachably connected to the tail of the piston core rod of the syringe through the suction cup. The suction cup can be a rubber suction cup or an electromagnetic suction cup. If an electromagnetic suction cup is used, a structure such as an iron sheet that can be adsorbed by the electromagnetic suction cup needs to be installed at the tail of the piston core rod; The clamping connection includes clamping and fixing through pipe clamps, buckles, card slots, chucks, etc.; The magnetic connection between the linear transmission mechanism and the tail of the piston core rod of the syringe is realized by installing mutually attracting magnets on the linear transmission mechanism and the tail of the piston core rod of the syringe respectively.

[0059] Embodiment 3

[0060] Based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that in this embodiment, the linear motion execution structure 2 is an electric telescopic rod. The guide rod of the electric telescopic rod is the linear transmission mechanism of the linear motion execution structure 2, and the guide rod of the electric telescopic rod is detachably connected to the tail of the piston core rod of the syringe 3. The guide rod of the electric telescopic rod and the tail of the piston core rod of the syringe 3 can be detachably connected through adsorption connection, clamping connection or magnetic connection. The structure for realizing the detachable connection between the two through adsorption connection, clamping connection or magnetic connection refers to Embodiment 2.

[0061] Embodiment 4

[0062] Based on the above embodiments, in this embodiment, the syringe fixing structure 1 includes at least one pipe clamp that matches the shape and size of the syringe barrel of the syringe 3. The syringe 3 is clamped on the pipe clamp, and the pipe clamp is fixedly connected to the corresponding position of the linear motion execution structure 2 through a support frame. The pipe clamp in this embodiment 1, as the clamping structure of the syringe barrel, can be used instead of the buckle in embodiment 1 and can also be used in cooperation with the linear motion execution structures described in embodiments 2-3. The pipe clamp is a conventional structure, such as a double-row bolt pipe clamp, which can clamp a cylindrical syringe barrel. The pipe clamp structure is mature and it is convenient to disassemble and assemble the syringe.

[0063] Embodiment 5

[0064] Based on the above embodiments, the syringe fixing structure 1 includes at least one chuck that matches the shape and size of the syringe barrel of the syringe 3. The syringe 3 passes through the chuck and is clamped to the chuck, and the chuck is fixedly connected to the corresponding position of the linear motion execution structure 2 through a support frame. When in use, the syringe is inserted into the central channel of the chuck along its axial direction, and the chuck clamps on the outer wall of the syringe barrel. In this way, the tail of the piston rod of the syringe is preferably detachably connected to the front end of the corresponding linear motion execution structure through magnetic connection or adsorption connection, and the block structure described in embodiment 1 is not suitable.

[0065] Embodiment 6

[0066] Based on embodiment 1, what is different from embodiment 1 is that in this embodiment, the linear motion execution structure 2 can also be a synchronous pulley and synchronous belt. A synchronous belt is connected between two synchronous pulleys, and a block is installed on the synchronous belt. A groove that matches the shape of the tail of the piston rod of the syringe 3 is provided on the block. The synchronous belt is detachably connected to the tail of the piston rod of the syringe 3 through the block. Generally, the synchronous pulleys are driven by a motor, and the two synchronous pulleys synchronously drive the synchronous belt to perform a linear reciprocating motion between the two synchronous pulleys. The block on the synchronous belt moves synchronously with the synchronous belt, and the block drives the piston rod of the syringe 3 to perform a linear reciprocating motion; in this embodiment, the synchronous belt is the linear transmission mechanism of the linear motion execution structure; in the actual use process, the synchronous pulley, synchronous belt and the motor corresponding to the driving synchronous pulley can use structures such as a housing or a support frame as the support structure. At present, the structure of the synchronous pulley and synchronous belt is a prior art, and its specific structure and installation method will not be elaborated too much here.

[0067] Embodiment 7

[0068] Based on Embodiment 1, different from Embodiment 1, in this embodiment, the linear motion execution structure 2 may also be a matching gear and rack. The gear is driven by a motor. During the rotation of the gear, the rack engaged with it is driven to move. The rack is equivalent to the linear transmission mechanism of the linear motion execution structure. The rack is detachably connected to the tail of the piston rod of the syringe 3 through a clamping block with a clamping groove. The movement of the rack realizes the synchronous movement of the piston rod of the syringe 3. The support structure of the gear, rack and motor can be a housing, or a support frame, or a support seat, etc. It is necessary to ensure that the rack meshes with the gear and the rack can slide. The specific structures and installation methods of the gear and rack are prior arts.

[0069] Embodiment 8

[0070] Based on Embodiment 1, different from Embodiment 1, in this embodiment, the linear motion execution structure 2 may also be a cylinder. The piston in the cylinder is the linear transmission mechanism. The piston is detachably connected to the tail of the piston rod of the syringe 3. The linear motion of the piston of the cylinder will drive the piston rod of the syringe 3 to do linear motion. The cylinder is a prior art. Selecting a suitable model according to the actual use situation is a conventional technical means for those skilled in the art.

[0071] The above are only the preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made by those skilled in the art within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. External injector power device, characterized by: The invention comprises a syringe fixing structure (1) and a linear motion execution structure (2); the syringe (3) is detachably connected to the syringe fixing structure (1); the syringe fixing structure (1) and the linear motion execution structure (2) are connected in sequence along the axial direction of the syringe (3); a linear transmission mechanism in the linear motion execution structure (2) is detachably connected to the rear end of a piston core rod (31) of the syringe (3); and the linear transmission mechanism in the linear motion execution structure (2) pushes the piston core rod (31) to perform linear reciprocating motion in the syringe barrel of the syringe (3).

2. The external injector power device according to claim 1, characterized in that: The syringe fixing structure (1) comprises a support frame (11), the support frame (11) is connected and fixed to an end surface of a linear motion execution structure (2), at least one buckle (12) is installed on the support frame (11), and the syringe (3) is buckled with the buckle (12).

3. The external injector power device according to claim 2, characterized in that: A plurality of buckles (12) are mounted on the support frame (11), and all the buckles (12) are arranged in sequence along the axial direction of the syringe (3), and the syringe (3) is buckled with all the buckles (12).

4. The external injector power device according to claim 1, characterized in that: The syringe fixing structure (1) comprises at least one tube clamp having a shape and size matching that of the syringe barrel of the syringe (3); the syringe (3) is clamped on the tube clamp, and the tube clamp is connected and fixed to a corresponding position of the linear motion execution structure (2) via a support frame (11).

5. The external injector power device according to claim 1, characterized in that: The syringe fixing structure (1) comprises at least one chuck that matches the shape and size of the syringe barrel of the syringe (3); the syringe (3) passes through the chuck and is clamped with the chuck; the chuck is connected and fixed to the corresponding position of the linear motion execution structure (2) via a support frame (11).

6. The external injector power device according to claim 1, characterized in that: The linear motion execution structure (2) comprises an internally hollow shell (21), the syringe fixing structure (1) is connected and fixed to the front end surface of the shell (21), a screw rod (22) is installed inside the shell (21), and the screw rod (22) is a linear transmission mechanism of the linear motion execution structure (2), the central axis of the screw rod (22) is parallel to the central axis of the syringe (3), and one end of the screw rod (22) passes through the shell (21) and is detachably connected to the tail of the piston core rod of the syringe (3), and the other end of the screw rod (22) is installed with a motor (23) for driving the screw rod (22), and the motor (23) is connected and fixed to the rear end of the shell (21); under the drive of the motor (23), the screw rod (22) drives the piston core rod (31) of the syringe (3) to perform linear reciprocating motion in the syringe barrel of the syringe (3).

7. The external injector power device according to claim 6, characterized in that: A clamping block (24) is mounted on one end of the screw rod (22), and a clamping groove matching the shape of the tail of the piston core rod of the syringe (3) is provided on the clamping block (24). The screw rod (22) is detachably connected to the tail of the piston core rod of the syringe (3) via the clamping block (24).

8. The external injector power device according to claim 1, characterized in that: The linear motion execution structure (2) is a micro servo electric cylinder, the linear transmission mechanism of the micro servo electric cylinder is detachably connected to the tail of the piston core rod of the syringe (3), the micro servo electric cylinder pushes the piston core rod (31) to perform linear reciprocating motion in the syringe barrel of the syringe (3) through the linear transmission mechanism, and the linear transmission mechanism of the micro servo electric cylinder includes one of a trapezoidal screw, a ball screw, and a roller screw.

9. The external injector power device according to claim 1, characterized in that: The linear motion execution structure (2) is an electric telescopic rod, the guide rod of the electric telescopic rod is a linear transmission mechanism of the linear motion execution structure (2), and the guide rod of the electric telescopic rod is detachably connected to the tail of the piston core rod of the syringe (3).

10. The external injector power device according to claim 1, characterized in that: The linear transmission mechanism in the linear motion execution structure (2) and the tail of the piston core rod of the syringe (3) are detachably connected through adsorption connection, clamping connection or magnetic connection.

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