WO2023036337A1 - Injector head for high-pressure injector - Google Patents

Injector head for high-pressure injector Download PDF

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Publication number
WO2023036337A1
WO2023036337A1 PCT/CN2022/118449 CN2022118449W WO2023036337A1 WO 2023036337 A1 WO2023036337 A1 WO 2023036337A1 CN 2022118449 W CN2022118449 W CN 2022118449W WO 2023036337 A1 WO2023036337 A1 WO 2023036337A1
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WO
WIPO (PCT)
Prior art keywords
injection head
screw
syringe
pressure injector
motor
Prior art date
Application number
PCT/CN2022/118449
Other languages
French (fr)
Chinese (zh)
Inventor
堀信一
堀笃史
五十岚光夫
五十岚亮莱昂纳多
宫田智治
Original Assignee
临床支持有限公司
科斯米克M.E.公司
阿波罗Rt有限公司
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Publication date
Application filed by 临床支持有限公司, 科斯米克M.E.公司, 阿波罗Rt有限公司 filed Critical 临床支持有限公司
Publication of WO2023036337A1 publication Critical patent/WO2023036337A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body

Definitions

  • the utility model relates to the technical field of medical equipment, in particular to an injection head for a high-pressure injector.
  • Contrast agent is one of the most commonly used drugs in interventional radiology operations, mainly used for the display of blood vessels and body cavities to improve the accuracy of diagnosis.
  • contrast agents There are various types of contrast agents, and most of the contrast agents currently used in interventional radiology are iodine-containing preparations.
  • Contrast medium consumption is an independent risk factor for contrast nephropathy.
  • Cigarroa et al. proposed a formula for calculating the amount of contrast agent: 5ml ⁇ body weight (Kg)/Cr(mg/dl), and the maximum amount should not exceed 300ml. Studies have shown that the incidence of contrast nephropathy is 21%-37% if the dosage exceeds the threshold, and 0%-2% if the threshold is not exceeded.
  • the incidence and severity of physical-chemical reactions are related to the amount of contrast agent used.
  • the osmotic pressure of commonly used contrast agents is significantly higher than that of blood, which is 2 to 5 times that of blood, so it is easy to cause various damages, so reduce contrast agent
  • the dosage is beneficial to the patient.
  • angiographic high-pressure injectors are used in practical applications to inject large doses and high flow rates through the injection head, and patients often have to ingest unnecessary excessive doses of contrast media.
  • the angiography may fail due to control accuracy and syringe structure.
  • the existing injection head for high-pressure injectors is provided with a screw structure at the output end of the driving part, thereby driving the push rod connected to the syringe piston to reciprocate, which is often large in size, takes up space and is not conducive to operation.
  • the purpose of this utility model is to provide a compact and miniaturized injection head for a high-pressure injector capable of injecting contrast medium with low flow rate and high precision.
  • the utility model provides an injection head for a high-pressure injector.
  • the injection head includes: a housing: a frame supported inside the housing; a motor mounted on the frame; The motor is arranged on the side of the motor in the form of an encoder on the frame; the screw assembly is arranged on the frame obliquely below the motor; and the power of the motor is transmitted to the
  • the synchronous belt transmission mechanism of the screw assembly; the screw assembly includes a screw that is rotatably inserted through the frame, and drives the rubber plug of the syringe along the axial direction of the screw when the screw rotates.
  • the moving part and the slide rail supporting the moving part; the front end of the casing is provided with a jaw for clamping the syringe of the syringe and a bracket for supporting the syringe.
  • the occupied space can be effectively reduced, the size of the main body of the injection head can be reduced, and it can be miniaturized.
  • the syringe and the injection head can be integrally formed by arranging the jaws and the bracket at the front end of the housing, and the syringe can be easily disassembled by opening and closing the jaws.
  • the moving part is composed of a screw nut arranged on the screw rod and a push rod connected with the screw nut; the push rod is sleeved on the outside of the screw rod And slidably inserted through the front end of the housing.
  • the moving part further includes a slider, and the screw nut is slidably supported on the slide rail through the slider; guide rod.
  • the synchronous belt transmission mechanism includes a first synchronous gear arranged at the end of the output shaft of the motor, a second synchronous gear arranged at the rear of the screw rod, and the The first synchronous gear drives the belt connected with the second synchronous gear. This enables precise and smooth power transmission.
  • the synchronous belt transmission mechanism further includes a tension pulley arranged on the frame.
  • the end of the screw rod protrudes from the rear end of the housing and is provided with a knob. Therefore, the screw rod can be manually driven to rotate, and the high-pressure injector can be detached from the injection head when the device is powered off.
  • a sensor seat is provided on the bracket; an air bubble sensor is provided on the sensor seat.
  • an air bubble sensor for detecting the existence of air bubbles in the pipeline can be installed, and at the same time, the air bubble sensor can also play the role of fixing the pipeline.
  • the upper part of the housing is formed into a terrace shape with an inclined surface inclined to the rear; the top of the housing is provided with a stop key, and the inclined surface is provided with a button for controlling the Control button that describes the forward and backward movement of the fader.
  • the height of the injection head can be effectively reduced.
  • the injection head is also equipped with a power supply box; the control circuit of the injection head is arranged in the power supply box.
  • the main control circuit board By arranging the main control circuit board in the power supply box, the internal components of the injection head can be reduced, thereby saving the internal space and making it more compact.
  • a handle is provided on one side of the housing.
  • the utility model has the advantages of simple structure, compact structure and miniaturization, and can drive a high-pressure injection head with low flow rate and high precision to inject contrast agent.
  • Fig. 1 shows a perspective view of an injection head for a high-pressure injector loaded with a high-pressure injector according to an embodiment of the present invention
  • Fig. 2 shows a top view of an injection head for a high-pressure injector loaded with a high-pressure injector according to an embodiment of the present invention
  • Fig. 3 is a W-W sectional view of the injection head for the high-pressure injector shown in Fig. 2;
  • Fig. 4 is an A-A sectional view of the injection head for the high-pressure injector shown in Fig. 2;
  • Fig. 5 shows the high-pressure injector kit provided with the injection head for the high-pressure injector shown in Fig. 1;
  • FIG. 1 is a perspective view of an injection head 100 for a high-pressure injector equipped with a high-pressure injector 200 according to an embodiment of the present invention
  • FIG. 2 is a top view of the injection head 100 for a high-pressure injector.
  • the direction in which the injection head pushes the high-pressure syringe to inject contrast medium in Figures 1 and 2 is defined as “front”
  • the direction in which the injection head pulls the high-pressure syringe to absorb contrast medium is defined as “rear”
  • "up” and “down” are defined
  • “Left” and “Right” are “Up”, “Down”, “Left” and “Right” when viewing the injection head from the rear.
  • orientation or positional relationship in the description of the utility model is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device or element Must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention.
  • the injection head 100 is used in conjunction with the high-pressure injector 200.
  • the front part of the injection head 100 is provided with a syringe seat for installing the high-pressure injector 200, and the moving parts inside the injection head 100 are connected with the high-pressure injector 200.
  • the rubber plug 220 described later is connected to convert the output of the motor 30 described below as a driving member into a linear motion, and the rubber plug 220 is driven to reciprocate to extract or inject the contrast agent.
  • FIG. 3 and 4 are cross-sectional views of the injection head 100
  • FIG. 3 is a cross-sectional view of the injection head 100 for a high-pressure injector along the direction W-W
  • FIG. 4 The detailed structure of the injection head 100 will be described below with reference to FIG. 4 .
  • the injection head 100 includes an injection head body and a syringe seat.
  • the main body of the injection head is mainly used to drive the rubber plug 220 of the high-pressure injector 200 to reciprocate at a specified speed, which includes a housing, a frame 20, a motor 30, a synchronous belt transmission mechanism and a screw assembly.
  • the casing is the shell of the main body of the injection head.
  • the casing is composed of a lower casing 11 and an upper casing 12, but it is not limited thereto, and may also be formed in other structures such as a front-rear split type.
  • a large-diameter through hole for the push rod 63 described later is formed in the center of the front end of the lower housing 11, and a large diameter through hole for the push rod 63 described later is formed on both sides of the through hole.
  • the small-diameter through hole that the support rod 74 stretches out.
  • the cable of the injection head is drawn out from the right front part of the lower housing 11, and is connected to the power supply box (not shown) that distributes power to the injection head.
  • the control circuit of the injection head is also externally connected to the power supply.
  • the internal components of the injection head can be reduced, thereby saving internal space and making it more compact.
  • a handle 90 for manually adjusting the position of the injection head 100 is installed through a hand guard 91 at the middle part on the left side.
  • a rod member for connecting the bedside stand may be further provided on the right side of the lower case 11 .
  • the upper case 12 is formed in a stepped shape having an inclined surface inclined rearward.
  • Control buttons for controlling the forward and backward movement of the push rod 63 in the injection head 100 are arranged on the inclined surface, and the control buttons include a fast-forward key 82 and a slow-forward key 83 .
  • the control button can be seen when the injection head 100 is erected to inhale and exhaust the medicine when it is arranged on the inclined surface, so as to facilitate operation.
  • the control buttons can be effectively reduced.
  • a stop key 84 for stopping the injection head 100 is provided on the top of the upper casing 12 .
  • the frame 20 is arranged inside the casing, and is mainly used for setting and supporting the motor 30 , the synchronous belt transmission mechanism and the screw assembly which will be described later.
  • the frame 20 is formed with a plurality of through holes including a first through hole for setting the motor 30 and a second through hole for setting the screw assembly, wherein the second through hole is formed on the side of the first through hole below.
  • the motor 30 is the driving unit of the injection head, for example, it may be a high-precision motor with its own planetary gear reducer. As shown in Figure 4, the motor 30 is installed on the frame 20 in the form of the output shaft inserted through the first through hole, and the first end of the synchronous belt transmission mechanism described later is provided at the end of the output shaft, that is, at the end far away from the motor 30. Synchronous gear 41. An encoder 50 is arranged on the side of the motor 30 in the horizontal direction, and a gear is arranged at the rear of the encoder 50 , and the encoder 50 calculates the stroke of the motor 30 by means of the transmission of the gear.
  • the screw assembly is a ball screw mechanism, which is used to convert the rotation output by the motor 30 into linear motion, thereby driving the rubber plug 220 of the high pressure injector 200 to reciprocate.
  • the screw assembly includes a ball screw pair consisting of a screw 61 and a moving part, and a slide rail 65 supporting the moving part.
  • a thrust bearing is provided in the second through hole, and the screw rod 61 is rotatably inserted through the frame 20 through the thrust bearing and extends in the front-rear direction.
  • the pitch of the screw rod 61 may be 2 mm, for example.
  • a second synchronous gear 42 is provided on the rear portion of the screw rod 61 , that is, on the part that protrudes forward from the second through hole, and in the approximate middle of the screw rod 61 is provided with a gear that moves along the screw rod 61 when the screw rod 61 rotates.
  • a moving part that moves in the axial direction that is, the front and rear directions.
  • the slide rail 65 is erected from the bottom surface of the lower housing 11 and is arranged on the side of the screw rod 61 and the moving part.
  • a groove for nesting the moving part is formed on the slide rail 65 so as to support the moving part freely and slidably.
  • the slide rail 65 is not limited to the above structure, and may also be laid horizontally on the bottom surface of the lower case 11 .
  • the screw assembly is disposed on the frame 20 in the front-rear direction so as to be positioned below the motor 30 .
  • the moving part includes a screw nut 62 and a push rod 63 .
  • the screw nut 62 is disposed on the screw rod 61 , and moves forward and backward along the axial direction of the screw rod 61 when the screw rod 61 rotates.
  • the push rod 63 is formed into a substantially tubular structure with openings at both ends. A diameter through hole, so that the push rod 63 can move forward and backward in the axial direction under the drive of the screw nut 62 .
  • the front end of the push rod 63 is also provided with a push rod head 63a, the push rod head 63a is formed into a roughly cap shape, and its small diameter end is inserted into the front end of the push rod 63, and the large diameter end is provided with a rubber plug 220 card of the high pressure injector 200. combined slot, so as to drive the rubber plug 220 to move back and forth.
  • the moving part further includes a sliding block 64 nested in the sliding rail 65 , the sliding block 64 is integrated with the screw nut 62 through fixing parts such as bolts, so that the screw nut 62 is slidably supported on the sliding rail 65 .
  • wing holes are provided on both sides of the slider 64, and linear bearings are installed in the wing holes, and a pair of guide rods 64a extending along the front and rear directions are inserted through the wing holes.
  • the guide rods 64a are used to guide the slider 64 to prevent the slider 64 And screw nut 62 rolls in slide rail 65.
  • a synchronous belt transmission mechanism for transmitting power from the motor 30 to the screw assembly is also provided on the frame 20 .
  • the synchronous belt transmission mechanism includes the above-mentioned first synchronous gear 41 arranged at the end of the output shaft of the motor 30, the second synchronous gear 42 arranged at the rear of the screw rod 61, and the transmission connection between the first synchronous gear 41 and the second synchronous gear 42.
  • the synchronous belt transmission mechanism also includes a tensioning pulley arranged on the frame 20 for tensioning the belt.
  • the synchronous belt transmission mechanism is a synchronous belt transmission structure
  • the belt can be a trapezoidal or toothed synchronous belt
  • the first synchronous gear 41, the second synchronous gear 42 and the tensioning wheel can be synchronous wheels, thus realizing accurate, Smooth power delivery.
  • the maximum speed of the motor 30 can reach 16,900 rpm, for example, and it is equipped with a planetary gear reducer.
  • the reduction ratio can be, for example, 20:1, and the precise reduction ratio is 81:4.
  • the transmission ratio of the synchronous belt transmission mechanism can be 20:12. With the help of an integrated high-precision encoder with 1024 counts per revolution and a screw pitch of 2mm, the injection accuracy can be controlled theoretically: 0.00413mL.
  • the above is only an example in the implementation form, and the utility model is not limited thereto, and can be set according to actual needs.
  • the size of the main body of the injection head can be reduced to make it miniaturization.
  • the height of the main body of the injection head can be effectively reduced by disposing the control buttons and the like on the inclined surface of the upper case 12 .
  • the high-pressure injector 200 includes a syringe 210 and a rubber plug 52.
  • a syringe interface as a liquid output end is formed at the tip of the syringe 210, and a flange protruding radially outward is formed at the end of the syringe 210.
  • the rubber plug 52 is the same as the above-mentioned
  • the push rod head 63 a is engaged to move integrally with the push rod 63 .
  • the high-pressure injector 200 is configured such that the syringe 210 can be removed from the bracket 72 only when the rubber stopper 220 is located at the extreme end of the syringe 210, that is, when the push rod 64 retreats to the rear limit.
  • the syringe 210 can be integrated with the reinforcing sleeve, and its capacity can be 30mL.
  • its capacity can be 30mL.
  • a pair of support rods 74 are embedded in the bottom front end of the injection head main body, specifically in the two small-diameter through holes of the lower casing 11, and a syringe seat for clamping and supporting the high-pressure syringe 200 is arranged on the pair of support rods 74.
  • the syringe holder mainly includes a jaw 71 and a bracket 72 .
  • the bracket 72 is formed in a substantially triangular shape, and is mainly used to support the high pressure syringe 200 .
  • the end of the bracket 72 is provided with a jaw 71 for clamping the high-pressure injector 200.
  • the jaw 71 is formed in a substantially arched shape, and a groove corresponding to the size of the flange at the end of the syringe 210 is formed on the radial inner side thereof. This locks the syringe 210 when the jaws 71 are closed.
  • a sensor seat 73 is provided on the side of the bracket 72 , and the sensor seat 73 is mainly used for installing an air bubble sensor 311 for detecting air bubbles in the pipeline during injection.
  • the air bubble sensor 311 is formed in a substantially clip shape, and an opening for fitting into a pipeline is formed on one side.
  • the power of the motor 30 is transmitted to the screw rod 61 through the synchronous belt transmission mechanism.
  • the synchronous belt transmission mechanism drives the screw rod 61 to rotate, thereby driving the screw nut 62
  • the rubber plug 220 is driven forward or backward by the push rod 63 to realize the injection or extraction of the contrast agent.
  • the screw rod 61 can be further inserted through the rear end of the lower housing 11 to extend backward, and a knob 66 is arranged on the end of the screw rod 61, and the knob 66 is a manual knob that can be manually operated. 66 can rotate screw mandrel 61 by means.
  • the push rod 63 can be turned back to the rear limit position by manually operating the knob 66, so that the rubber plug 220 can move to the end of the syringe 210, thereby facilitating the removal of the syringe 210 from the syringe bracket remove.
  • FIG. 5 shows a high pressure syringe kit provided with an injection head 100 .
  • the high-pressure injector set includes an injection head 100 , a high-pressure injector 200 , a contrast medium pipeline 300 and a bottle insertion needle 400 .
  • a three-way joint 310 is provided on the contrast medium pipeline 300 .
  • the first port of the three-way joint 310 is connected to the syringe interface of the high-pressure syringe 200 through the pipeline, the second port is connected to the bottle insertion needle 400 inserted into the liquid medicine bottle through the pipeline, and the third port is connected to the microcatheter through the pipeline, and through the micro
  • the catheter outputs the contrast agent to the patient, and at this time, the air bubble sensor 311 arranged on the sensor seat 73 also plays the role of clamping and fixing the pipeline.
  • a plurality of clip-shaped air bubble sensors 312 are provided between the second port of the tee joint 310 and the bottle insertion needle 400 .
  • the air bubble sensor 311 is mainly used to detect whether there are bubbles in the contrast agent output from the three-way joint 310 to the patient, and the air bubble sensor 312 is mainly used to detect whether there are air bubbles between the bottle insertion needle 400 and the three-way joint 310. If there are air bubbles in the path, a high level will be output, and the injection head 100 will stop the injection to prevent air bubbles from being injected into human blood vessels.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Emergency Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

An injector head (100) for a high-pressure injector (200) comprises: a housing; a support frame (20) disposed inside the housing; a motor (30) mounted on the support frame (20); an encoder (50) disposed on the support frame (20) and, in the horizontal direction, on the side of the motor (30); a ball screw drive assembly disposed on the support frame (20) and obliquely below the motor (30); and a timing belt transmission mechanism for transmitting power of the motor (30) to the ball screw drive assembly. The ball screw drive assembly comprises: a ball screw drive (61) inserted into the support frame (20) in such a manner as to rotate freely; a moving piece that drives a rubber plunger (300) of the injector (200) along the axial direction of the ball screw drive (61) when the ball screw drive (61) rotates; a slide rail (65) that supports said moving piece; and, provided at the front end of the housing, a clamp (71) that holds in place the syringe barrel (210) of the injector (200), and a bracket (72) that supports the syringe barrel/injector. The injector head (100) has a simple and compact structure, and can drive the high-pressure injector (200) to inject contrast agent at a low flow rate and with high precision.

Description

一种高压注射器用注射头Injection head for a high-pressure syringe 技术领域technical field
本实用新型涉及医疗器械技术领域，具体地，涉及一种高压注射器用注射头。The utility model relates to the technical field of medical equipment, in particular to an injection head for a high-pressure injector.
背景技术Background technique
造影剂是介入放射学操作中最常使用的药物之一，主要用于血管、体腔的显示，提高诊断的准确性。造影剂种类多样，目前用于介入放射学的造影剂多为含碘制剂。造影剂用量是引起造影剂肾病的独立危险因素。Cigarroa等提出造影剂用量的计算公式：5ml×体重(Kg)/Cr(mg/dl)，最大用量不超过300ml。有研究显示越过阈值用量，造影剂肾病发生率为21％-37％，未越阈值者为0％-2％。物理-化学反应的发生率及严重程度与所用造影剂的量有关，目前常用的造影剂其渗透压均明显超过血液，是其2～5倍，故很易产生各种损害，因此减少造影剂用量对患者有益。Contrast agent is one of the most commonly used drugs in interventional radiology operations, mainly used for the display of blood vessels and body cavities to improve the accuracy of diagnosis. There are various types of contrast agents, and most of the contrast agents currently used in interventional radiology are iodine-containing preparations. Contrast medium consumption is an independent risk factor for contrast nephropathy. Cigarroa et al. proposed a formula for calculating the amount of contrast agent: 5ml×body weight (Kg)/Cr(mg/dl), and the maximum amount should not exceed 300ml. Studies have shown that the incidence of contrast nephropathy is 21%-37% if the dosage exceeds the threshold, and 0%-2% if the threshold is not exceeded. The incidence and severity of physical-chemical reactions are related to the amount of contrast agent used. The osmotic pressure of commonly used contrast agents is significantly higher than that of blood, which is 2 to 5 times that of blood, so it is easy to cause various damages, so reduce contrast agent The dosage is beneficial to the patient.
传统的血管造影高压注射器在实际应用中，通过注射头进行大剂量和高流速注射，病人往往不得不摄入不必要的过多剂量的造影剂。而配合微导管使用时，如采用低流速和小剂量注射往往因控制精度和针筒结构原因，导致造影失败的情况。现有的高压注射器用注射头内部通过在驱动件的输出端设置丝杆结构，从而带动连接于针筒活塞的推杆进行往复运动，其体积往往较大，占用空间且不利于操作。Traditional angiographic high-pressure injectors are used in practical applications to inject large doses and high flow rates through the injection head, and patients often have to ingest unnecessary excessive doses of contrast media. However, when used with a microcatheter, if low flow rate and small dose injection are used, the angiography may fail due to control accuracy and syringe structure. The existing injection head for high-pressure injectors is provided with a screw structure at the output end of the driving part, thereby driving the push rod connected to the syringe piston to reciprocate, which is often large in size, takes up space and is not conducive to operation.
实用新型内容Utility model content
实用新型要解决的问题：Problems to be solved by the utility model:
针对上述问题，本实用新型的目的在于提供一种结构紧凑、小型化，能以低流量高精度注射造影剂的高压注射器用注射头。In view of the above problems, the purpose of this utility model is to provide a compact and miniaturized injection head for a high-pressure injector capable of injecting contrast medium with low flow rate and high precision.
解决问题的技术手段：Technical means to solve the problem:
为解决上述问题，本实用新型提供一种高压注射器用注射头，所述注射头包括：壳体：支持于所述壳体的内部的机架；安装于所述机架的马达；以位于所述马达的水平方向侧方的形式设置于所述机架的编码器；以位于所述马达的斜下方的形式设置于所述机架的丝杆组件；以及将所述马达的动力传递至所述丝杆组件的同步带传动机构；所述丝杆组件包括转动自如地插通所述机架的丝杆、在所述丝杆转动时沿所述丝杆的轴向带动注射器的胶塞的移动件以及支持所述移动件的滑轨；所述壳体的前端设置有夹持所述注射器的针筒的夹爪和支持所述针筒的托架。In order to solve the above problems, the utility model provides an injection head for a high-pressure injector. The injection head includes: a housing: a frame supported inside the housing; a motor mounted on the frame; The motor is arranged on the side of the motor in the form of an encoder on the frame; the screw assembly is arranged on the frame obliquely below the motor; and the power of the motor is transmitted to the The synchronous belt transmission mechanism of the screw assembly; the screw assembly includes a screw that is rotatably inserted through the frame, and drives the rubber plug of the syringe along the axial direction of the screw when the screw rotates. The moving part and the slide rail supporting the moving part; the front end of the casing is provided with a jaw for clamping the syringe of the syringe and a bracket for supporting the syringe.
根据本实用新型，通过将丝杆组件设置于马达侧下方，并通过同步带传动机构进行 传动，能够有效减少占用空间，减小注射头主体的尺寸，使其小型化。通过在壳体前端设置夹爪和托架能够使注射器与注射头形成一个整体，通过开合夹爪能方便地拆装注射器。According to the utility model, by arranging the screw assembly under the side of the motor and driving it through the synchronous belt transmission mechanism, the occupied space can be effectively reduced, the size of the main body of the injection head can be reduced, and it can be miniaturized. The syringe and the injection head can be integrally formed by arranging the jaws and the bracket at the front end of the housing, and the syringe can be easily disassembled by opening and closing the jaws.
也可以是，本实用新型中，所述移动件由设置于所述丝杆的丝杆螺母和与所述丝杆螺母连接的推杆组成；所述推杆套设于所述丝杆的外侧且滑动自如地插通所述壳体的前端。通过将丝杆和丝杆螺母设置为一体，能缩短结构长度。It can also be that, in the present utility model, the moving part is composed of a screw nut arranged on the screw rod and a push rod connected with the screw nut; the push rod is sleeved on the outside of the screw rod And slidably inserted through the front end of the housing. By integrating the screw rod and the screw nut, the structural length can be shortened.
也可以是，本实用新型中，所述移动件还包括滑块，所述丝杆螺母通过所述滑块滑动自如地支持于所述滑轨；所述滑轨上设置有引导所述滑块的导杆。It may also be that, in the present utility model, the moving part further includes a slider, and the screw nut is slidably supported on the slide rail through the slider; guide rod.
也可以是，本实用新型中，所述同步带传动机构包括设置于所述马达的输出轴的末端的第一同步齿轮、设置于所述丝杆的后部的第二同步齿轮以及将所述第一同步齿轮与所述第二同步齿轮传动连接的皮带。由此实现准确、平稳的动力传递。It is also possible that in the present utility model, the synchronous belt transmission mechanism includes a first synchronous gear arranged at the end of the output shaft of the motor, a second synchronous gear arranged at the rear of the screw rod, and the The first synchronous gear drives the belt connected with the second synchronous gear. This enables precise and smooth power transmission.
也可以是，本实用新型中，所述同步带传动机构还包括设置于所述机架的张紧轮。It may also be that, in the present utility model, the synchronous belt transmission mechanism further includes a tension pulley arranged on the frame.
也可以是，本实用新型中，所述丝杆的末端从所述壳体的后端伸出并设置有旋钮。由此能够手动驱动丝杆旋转，能够在设备断电的情况下将高压注射器从注射头上拆下。It may also be that, in the present invention, the end of the screw rod protrudes from the rear end of the housing and is provided with a knob. Therefore, the screw rod can be manually driven to rotate, and the high-pressure injector can be detached from the injection head when the device is powered off.
也可以是，本实用新型中，所述托架上设置有传感器座；所述传感器座上设置有气泡传感器。由此能安装用于检测管路中是否存在气泡的气泡传感器，同时该气泡传感器还可以发挥固定管路的作用。It may also be that, in the present utility model, a sensor seat is provided on the bracket; an air bubble sensor is provided on the sensor seat. In this way, an air bubble sensor for detecting the existence of air bubbles in the pipeline can be installed, and at the same time, the air bubble sensor can also play the role of fixing the pipeline.
也可以是，本实用新型中，所述壳体的上部形成为具有向后方倾斜的倾斜面的梯台形状；所述壳体的顶部设置有停止键，所述倾斜面上设置有用于控制所述推杆前后运动的控制按钮。由此能有效降低注射头的高度。It can also be that, in the present utility model, the upper part of the housing is formed into a terrace shape with an inclined surface inclined to the rear; the top of the housing is provided with a stop key, and the inclined surface is provided with a button for controlling the Control button that describes the forward and backward movement of the fader. As a result, the height of the injection head can be effectively reduced.
也可以是，本实用新型中，所述注射头还配有电源箱；所述注射头的控制电路设置于所述电源箱内。通过将主控线路板设置在电源箱内，能够减少注射头的内部组件，从而节约内部空间使其更加紧凑。It can also be that, in the present utility model, the injection head is also equipped with a power supply box; the control circuit of the injection head is arranged in the power supply box. By arranging the main control circuit board in the power supply box, the internal components of the injection head can be reduced, thereby saving the internal space and making it more compact.
也可以是，本实用新型中，所述壳体的一侧设置有手柄。It may also be that, in the present utility model, a handle is provided on one side of the housing.
实用新型效果：Utility model effects:
本实用新型结构简单，结构紧凑、小型化，能以低流量高精度驱动高压注射头注射造影剂。The utility model has the advantages of simple structure, compact structure and miniaturization, and can drive a high-pressure injection head with low flow rate and high precision to inject contrast agent.
附图说明Description of drawings
图1示出了根据本实用新型一实施形态的装载有高压注射器的高压注射器用注射头的立体图；Fig. 1 shows a perspective view of an injection head for a high-pressure injector loaded with a high-pressure injector according to an embodiment of the present invention;
图2示出了根据本实用新型一实施形态的装载有高压注射器的高压注射器用注射头的俯视图；Fig. 2 shows a top view of an injection head for a high-pressure injector loaded with a high-pressure injector according to an embodiment of the present invention;
图3是图2所示高压注射器用注射头的W-W向剖视图；Fig. 3 is a W-W sectional view of the injection head for the high-pressure injector shown in Fig. 2;
图4是图2所示高压注射器用注射头的A-A向剖视图；Fig. 4 is an A-A sectional view of the injection head for the high-pressure injector shown in Fig. 2;
图5示出了设置有图1所示高压注射器用注射头的高压注射器套件；Fig. 5 shows the high-pressure injector kit provided with the injection head for the high-pressure injector shown in Fig. 1;
符号说明：Symbol Description:
100、注射头；11、下壳体；12、上壳体；20、机架；30、马达；41、第一同步齿轮；42、第二同步齿轮；43、皮带；50、编码器；61、丝杆；62、丝杆螺母；63、推杆；63a、推杆头；64、滑块；64a、导杆；65、滑轨；66、旋钮；71、夹爪；72、托架；72a、按键；73、传感器座；74；支撑杆；81、PCB电路板；82、快进键；83、慢进键；84、停止键；90、手柄；91、护手板；200、高压注射器；210、针筒；220、胶塞；300、造影剂管路；310、三通接头；311、气泡传感器；312、气泡传感器；400、插瓶针。100, injection head; 11, lower casing; 12, upper casing; 20, frame; 30, motor; 41, first synchronous gear; 42, second synchronous gear; 43, belt; 50, encoder; 61 , screw mandrel; 62, screw mandrel nut; 63, push rod; 63a, push rod head; 64, slider; 64a, guide rod; 65, slide rail; 66, knob; 71, jaw; 72, bracket; 72a, button; 73, sensor seat; 74; support rod; 81, PCB circuit board; 82, fast forward key; 83, slow forward key; 84, stop key; 90, handle; 91, hand guard; 200, high pressure injector ; 210, syringe; 220, rubber stopper; 300, contrast agent pipeline; 310, tee joint; 311, air bubble sensor; 312, air bubble sensor; 400, bottle insertion needle.
具体实施方式Detailed ways
以下结合附图和下述实施方式进一步说明本实用新型，应理解，附图和下述实施方式仅用于说明本实用新型，而非限制本实用新型。The utility model will be further described below in conjunction with the accompanying drawings and the following embodiments. It should be understood that the accompanying drawings and the following embodiments are only used to illustrate the present utility model, rather than limit the present utility model.
在此公开一种结构紧凑、小型化，能以低流量高精度注射造影剂的高压注射器用注射头(以下简称“注射头”)。图1是根据本实用新型一实施形态的装载有高压注射器200的高压注射器用注射头100的立体图，图2是高压注射器用注射头100的俯视图。在此，将图1和2中注射头推动高压注射器注射造影剂的方向定义为“前方”，将注射头拉动高压注射器吸取造影剂的方向定义为“后方”，定义“上”、“下”、“左”、“右”为从后方观察注射头时的“上”、“下”、“左”、“右”方向。需要说明的是，本实用新型的描述中方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。Disclosed herein is an injection head for a high-pressure injector (hereinafter referred to as "injection head") that is compact in structure, miniaturized, and capable of injecting contrast medium with low flow rate and high precision. FIG. 1 is a perspective view of an injection head 100 for a high-pressure injector equipped with a high-pressure injector 200 according to an embodiment of the present invention, and FIG. 2 is a top view of the injection head 100 for a high-pressure injector. Here, the direction in which the injection head pushes the high-pressure syringe to inject contrast medium in Figures 1 and 2 is defined as "front", the direction in which the injection head pulls the high-pressure syringe to absorb contrast medium is defined as "rear", and "up" and "down" are defined , "Left" and "Right" are "Up", "Down", "Left" and "Right" when viewing the injection head from the rear. It should be noted that the orientation or positional relationship in the description of the utility model is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device or element Must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention.
如图1、图2所示，注射头100与高压注射器200配合使用，具体地，注射头100的前部设置有用于安装高压注射器200的注射器座，注射头100内部的移动件与高压注射器200的后述胶塞220连接，将作为驱动件的后述马达30的输出转化为直线运动，带动胶塞220进行往复运动从而抽取或是注射造影剂。As shown in Figures 1 and 2, the injection head 100 is used in conjunction with the high-pressure injector 200. Specifically, the front part of the injection head 100 is provided with a syringe seat for installing the high-pressure injector 200, and the moving parts inside the injection head 100 are connected with the high-pressure injector 200. The rubber plug 220 described later is connected to convert the output of the motor 30 described below as a driving member into a linear motion, and the rubber plug 220 is driven to reciprocate to extract or inject the contrast agent.
图3和图4是注射头100的剖视图，图3是高压注射器用注射头100的W-W向剖视图，图4是高压注射器用注射头100的A-A向剖视图。以下参照图图4说明注射头100的详细结构。如图3、图4所示，注射头100包括注射头主体和注射器座。3 and 4 are cross-sectional views of the injection head 100, FIG. 3 is a cross-sectional view of the injection head 100 for a high-pressure injector along the direction W-W, and FIG. The detailed structure of the injection head 100 will be described below with reference to FIG. 4 . As shown in FIG. 3 and FIG. 4 , the injection head 100 includes an injection head body and a syringe seat.
[注射头主体][Injection Head Body]
注射头主体主要用于以规定的速度带动高压注射器200的胶塞220往复运动，其包括壳体、机架20、马达30、同步带传动机构和丝杆组件。The main body of the injection head is mainly used to drive the rubber plug 220 of the high-pressure injector 200 to reciprocate at a specified speed, which includes a housing, a frame 20, a motor 30, a synchronous belt transmission mechanism and a screw assembly.
壳体是注射头主体的外壳，本实施形态中壳体由下壳体11和上壳体12构成，但不限于此，也可以形成为前后分体式等其他结构。如图2、图3和图4所示，下壳体11的前端中央形成有用于供后述的推杆63伸出的大径通孔，在该通孔的两侧形成有用于供后述的支撑杆74伸出的小径通孔。注射头的电缆从下壳体11的右侧前部向外引出，连接对注射头进行配电的电源箱(未图示)，本实施性形态中，注射头的控制电路也外置到电源箱中，由此能够减少注射头的内部组件，从而节约内部空间使其更加紧凑。另一方面，在左侧中部通过护手版91安装有用于手动调整注射头100的位置的手柄90。另外，虽未图示，但在下壳体11的右侧还可以设置有用于连接床边支架的杆构件。上壳体12形成为具有向后方倾斜的倾斜面的梯台形状。在该倾斜面上设置有用于控制注射头100中推杆63的前后运动的控制按钮，控制按钮包括快进键82和慢进键83。与控制按钮设置于上壳体12的顶部的情况相比，设置在倾斜面上能在竖起注射头100进行吸药和排气时看到控制按钮，从而方便操作。而且，通过将控制按钮设置在上壳体12的前侧面，能有效降低注射头的高度。另外，在上壳体12的顶部则设置有用于使注射头100停止工作的停止键84。The casing is the shell of the main body of the injection head. In this embodiment, the casing is composed of a lower casing 11 and an upper casing 12, but it is not limited thereto, and may also be formed in other structures such as a front-rear split type. As shown in Fig. 2, Fig. 3 and Fig. 4, a large-diameter through hole for the push rod 63 described later is formed in the center of the front end of the lower housing 11, and a large diameter through hole for the push rod 63 described later is formed on both sides of the through hole. The small-diameter through hole that the support rod 74 stretches out. The cable of the injection head is drawn out from the right front part of the lower housing 11, and is connected to the power supply box (not shown) that distributes power to the injection head. In this embodiment, the control circuit of the injection head is also externally connected to the power supply. In the case, the internal components of the injection head can be reduced, thereby saving internal space and making it more compact. On the other hand, a handle 90 for manually adjusting the position of the injection head 100 is installed through a hand guard 91 at the middle part on the left side. In addition, although not shown, a rod member for connecting the bedside stand may be further provided on the right side of the lower case 11 . The upper case 12 is formed in a stepped shape having an inclined surface inclined rearward. Control buttons for controlling the forward and backward movement of the push rod 63 in the injection head 100 are arranged on the inclined surface, and the control buttons include a fast-forward key 82 and a slow-forward key 83 . Compared with the situation where the control button is arranged on the top of the upper casing 12, the control button can be seen when the injection head 100 is erected to inhale and exhaust the medicine when it is arranged on the inclined surface, so as to facilitate operation. Moreover, by arranging the control buttons on the front side of the upper housing 12, the height of the injection head can be effectively reduced. In addition, a stop key 84 for stopping the injection head 100 is provided on the top of the upper casing 12 .
机架20设置于壳体内部，主要用于设置和支持后述的马达30、同步带传动机构以及丝杆组件。机架20上形成有包括用于设置马达30的第一贯通孔和用于设置丝杆组件的第二贯通孔在内的多个通孔，其中第二贯通孔形成于第一贯通孔的侧下方。The frame 20 is arranged inside the casing, and is mainly used for setting and supporting the motor 30 , the synchronous belt transmission mechanism and the screw assembly which will be described later. The frame 20 is formed with a plurality of through holes including a first through hole for setting the motor 30 and a second through hole for setting the screw assembly, wherein the second through hole is formed on the side of the first through hole below.
马达30是注射头的驱动单元，例如可以是自带行星齿轮减速箱的高精度马达。如图4所示，马达30以输出轴插通第一贯通孔的形式设置于机架20，在该输出轴的末端、即远离马达30的一端设置有后述同步带传动机构中的第一同步齿轮41。在马达30的水平方向侧方设置有编码器50，在编码器50的后部设置有齿轮，编码器50借助该齿轮的传动来计算马达30的行程。The motor 30 is the driving unit of the injection head, for example, it may be a high-precision motor with its own planetary gear reducer. As shown in Figure 4, the motor 30 is installed on the frame 20 in the form of the output shaft inserted through the first through hole, and the first end of the synchronous belt transmission mechanism described later is provided at the end of the output shaft, that is, at the end far away from the motor 30. Synchronous gear 41. An encoder 50 is arranged on the side of the motor 30 in the horizontal direction, and a gear is arranged at the rear of the encoder 50 , and the encoder 50 calculates the stroke of the motor 30 by means of the transmission of the gear.
丝杆组件是滚珠丝杠机构，用于将马达30输出的转动转化为直线运动，从而带动高压注射器200的胶塞220往复运动。丝杆组件包括由丝杆61和移动件构成的滚珠丝杠副、以及支持该移动件的滑轨65。第二贯通孔中设置有推力轴承，丝杆61通过该推力轴承转动自如地插通机架20并在前后方向上延伸，丝杆61的螺距例如可以是2mm。在该丝杆61的后部、即从第二贯通孔向前方伸出的部分上设置有第二同步齿轮42，在该丝杆61的大致中部设置有在丝杆61转动时沿丝杆61的轴向、即前后方向移动的移动件。滑轨65以从下壳体11的底面竖起的形式设置于丝杆61和移动件的侧方，滑轨65上形成有嵌套移动件的凹 槽，从而滑动自如地支持移动件。此外，滑轨65不限于上述结构，也可以是水平铺设于下壳体11的底面。由此，丝杆组件以位于马达30的侧下方的形式沿前后方向设置于机架20。The screw assembly is a ball screw mechanism, which is used to convert the rotation output by the motor 30 into linear motion, thereby driving the rubber plug 220 of the high pressure injector 200 to reciprocate. The screw assembly includes a ball screw pair consisting of a screw 61 and a moving part, and a slide rail 65 supporting the moving part. A thrust bearing is provided in the second through hole, and the screw rod 61 is rotatably inserted through the frame 20 through the thrust bearing and extends in the front-rear direction. The pitch of the screw rod 61 may be 2 mm, for example. A second synchronous gear 42 is provided on the rear portion of the screw rod 61 , that is, on the part that protrudes forward from the second through hole, and in the approximate middle of the screw rod 61 is provided with a gear that moves along the screw rod 61 when the screw rod 61 rotates. A moving part that moves in the axial direction, that is, the front and rear directions. The slide rail 65 is erected from the bottom surface of the lower housing 11 and is arranged on the side of the screw rod 61 and the moving part. A groove for nesting the moving part is formed on the slide rail 65 so as to support the moving part freely and slidably. In addition, the slide rail 65 is not limited to the above structure, and may also be laid horizontally on the bottom surface of the lower case 11 . Thus, the screw assembly is disposed on the frame 20 in the front-rear direction so as to be positioned below the motor 30 .
本实施形态中，移动件包括丝杆螺母62和推杆63。具体而言，丝杆螺母62设置于丝杆61，在丝杆61转动时沿其轴线方向前后移动。推杆63如图3、图4所示形成为两端开口的大致管状结构，其后端与丝杆螺母62固定连接，其前端滑动自如地插通设置于下壳体11的前端面的大径通孔，由此推杆63能够在丝杆螺母62的带动下沿轴向前后移动。在推杆63的前端还设置有推杆头63a，该推杆头63a形成为大致帽状，其小径端***推杆63的前端，大径端上设置有与高压注射器200的胶塞220卡合的卡槽，从而能带动胶塞220前后运动。移动件还包括嵌套在滑轨65中的滑块64，该滑块64通过螺栓等固定件与丝杆螺母62结合为一体，由此使丝杆螺母62滑动自如地支持于滑轨65。此外，在滑块64的两侧设置有翼孔，翼孔中装有直线轴承并插通沿前后方向延伸的一对导杆64a，该导杆64a用于引导滑块64以防止滑块64和丝杆螺母62在滑轨65内翻滚。In this embodiment, the moving part includes a screw nut 62 and a push rod 63 . Specifically, the screw nut 62 is disposed on the screw rod 61 , and moves forward and backward along the axial direction of the screw rod 61 when the screw rod 61 rotates. As shown in Figures 3 and 4, the push rod 63 is formed into a substantially tubular structure with openings at both ends. A diameter through hole, so that the push rod 63 can move forward and backward in the axial direction under the drive of the screw nut 62 . The front end of the push rod 63 is also provided with a push rod head 63a, the push rod head 63a is formed into a roughly cap shape, and its small diameter end is inserted into the front end of the push rod 63, and the large diameter end is provided with a rubber plug 220 card of the high pressure injector 200. combined slot, so as to drive the rubber plug 220 to move back and forth. The moving part further includes a sliding block 64 nested in the sliding rail 65 , the sliding block 64 is integrated with the screw nut 62 through fixing parts such as bolts, so that the screw nut 62 is slidably supported on the sliding rail 65 . In addition, wing holes are provided on both sides of the slider 64, and linear bearings are installed in the wing holes, and a pair of guide rods 64a extending along the front and rear directions are inserted through the wing holes. The guide rods 64a are used to guide the slider 64 to prevent the slider 64 And screw nut 62 rolls in slide rail 65.
在机架20上还设置有用于从马达30向丝杆组件传递动力的同步带传动机构。同步带传动机构包括上述设置于马达30的输出轴末端的第一同步齿轮41、设置于丝杆61的后部的第二同步齿轮42以及将第一同步齿轮41和第二同步齿轮42传动连接的皮带，此外同步带传动机构还包括设置于机架20上用于张紧皮带的张紧轮。本实施形态中，同步带传动机构是同步带传动结构，皮带可以是梯形或齿形同步带，第一同步齿轮41、第二同步齿轮42和张紧轮可以是同步轮，由此实现准确、平稳的动力传递。A synchronous belt transmission mechanism for transmitting power from the motor 30 to the screw assembly is also provided on the frame 20 . The synchronous belt transmission mechanism includes the above-mentioned first synchronous gear 41 arranged at the end of the output shaft of the motor 30, the second synchronous gear 42 arranged at the rear of the screw rod 61, and the transmission connection between the first synchronous gear 41 and the second synchronous gear 42. In addition, the synchronous belt transmission mechanism also includes a tensioning pulley arranged on the frame 20 for tensioning the belt. In this embodiment, the synchronous belt transmission mechanism is a synchronous belt transmission structure, the belt can be a trapezoidal or toothed synchronous belt, and the first synchronous gear 41, the second synchronous gear 42 and the tensioning wheel can be synchronous wheels, thus realizing accurate, Smooth power delivery.
本实施形态中，马达30的最高转速例如可达16900转，自带行星齿轮减速箱，其减速比例如可以是20:1，精确减速比为81:4。同步带传动机构的传动比可以是20:12。借助集成每圈计数1024的高精度编码器和2mm的丝杆螺距，理论可实现控制注***度：0.00413mL。以上仅为实施形态中的一个示例，本实用新型不限于此，可以根据实际需求进行设置。In this embodiment, the maximum speed of the motor 30 can reach 16,900 rpm, for example, and it is equipped with a planetary gear reducer. The reduction ratio can be, for example, 20:1, and the precise reduction ratio is 81:4. The transmission ratio of the synchronous belt transmission mechanism can be 20:12. With the help of an integrated high-precision encoder with 1024 counts per revolution and a screw pitch of 2mm, the injection accuracy can be controlled theoretically: 0.00413mL. The above is only an example in the implementation form, and the utility model is not limited thereto, and can be set according to actual needs.
如上所述，通过将丝杆组件和马达30平行设置，且将丝杆组件设置于马达30的下方且侧方，并通过同步带传动机构进行传动，能够减小注射头主体的尺寸，使其小型化。此外，通过将控制按钮等设置于上壳体12的倾斜面，能有效降低注射头主体的高度。通过将注射头的电缆连接至与注射头分体设置的电源箱中，并将注射头的控制电路外置到电源箱中，能够减少注射头主体的内部组件，从而节约内部空间使其更加紧凑。As mentioned above, by arranging the screw assembly and the motor 30 in parallel, and setting the screw assembly below and to the side of the motor 30, and driving through a synchronous belt transmission mechanism, the size of the main body of the injection head can be reduced to make it miniaturization. In addition, the height of the main body of the injection head can be effectively reduced by disposing the control buttons and the like on the inclined surface of the upper case 12 . By connecting the cable of the injection head to the power box that is separate from the injection head, and externally installing the control circuit of the injection head into the power box, the internal components of the main body of the injection head can be reduced, thereby saving internal space and making it more compact .
[高压注射器及注射器座][High pressure syringe and syringe seat]
高压注射器200包括针筒210和胶塞52，在针筒210的梢端形成有作为液体输出端的注射器接口，在针筒210的末端形成有向径向外侧突出的凸缘，胶塞52与上述推杆头63a卡合从而与推杆63一体地移动。高压注射器200构成为只有当胶塞220位于针筒210的最末端、即推杆64后退到后极限时才能将针筒210从托架72上取下。本实用新型中，针筒210可以与加强套筒结合成一体，其容量可以是30mL。通过缩减针筒容量和使加强套筒和针筒为一体，并针筒采用医用级高分子材料(例如PC材料)，可以保证针筒在注射时不变形，从而提高注***度。The high-pressure injector 200 includes a syringe 210 and a rubber plug 52. A syringe interface as a liquid output end is formed at the tip of the syringe 210, and a flange protruding radially outward is formed at the end of the syringe 210. The rubber plug 52 is the same as the above-mentioned The push rod head 63 a is engaged to move integrally with the push rod 63 . The high-pressure injector 200 is configured such that the syringe 210 can be removed from the bracket 72 only when the rubber stopper 220 is located at the extreme end of the syringe 210, that is, when the push rod 64 retreats to the rear limit. In the present utility model, the syringe 210 can be integrated with the reinforcing sleeve, and its capacity can be 30mL. By reducing the volume of the syringe and integrating the reinforced sleeve and the syringe, and using medical-grade polymer materials (such as PC materials) for the syringe, it can ensure that the syringe does not deform during injection, thereby improving injection accuracy.
在注射头主体的底部前端、具体而言在下壳体11的两个小径通孔中埋设有一对支撑杆74，在该一对支撑杆74上设置有用于夹持并支撑高压注射器200的注射器座。如图3、图4所示，注射器座主要包括夹爪71和托架72。托架72形成为大致三角状，主要用于支持高压注射器200，其长度针筒210的筒身大致相等，在平板状的托架主体的下方形成有用于增加托架强度的加强筋。在托架72的末端设置有用于夹持高压注射器200的夹爪71，夹爪71形成为大致拱状，在其径向内侧形成有与针筒210末端的凸缘对应尺寸的槽部，由此在夹爪71闭合时能锁定针筒210。A pair of support rods 74 are embedded in the bottom front end of the injection head main body, specifically in the two small-diameter through holes of the lower casing 11, and a syringe seat for clamping and supporting the high-pressure syringe 200 is arranged on the pair of support rods 74. . As shown in FIG. 3 and FIG. 4 , the syringe holder mainly includes a jaw 71 and a bracket 72 . The bracket 72 is formed in a substantially triangular shape, and is mainly used to support the high pressure syringe 200 . The end of the bracket 72 is provided with a jaw 71 for clamping the high-pressure injector 200. The jaw 71 is formed in a substantially arched shape, and a groove corresponding to the size of the flange at the end of the syringe 210 is formed on the radial inner side thereof. This locks the syringe 210 when the jaws 71 are closed.
此外，如图1所示，在托架72的侧方还设置有传感器座73，传感器座73主要用于设置用于在注射时检测管路中的气泡的气泡传感器311。气泡传感器311形成为大致夹状，在一侧形成有嵌入管路的开口。In addition, as shown in FIG. 1 , a sensor seat 73 is provided on the side of the bracket 72 , and the sensor seat 73 is mainly used for installing an air bubble sensor 311 for detecting air bubbles in the pipeline during injection. The air bubble sensor 311 is formed in a substantially clip shape, and an opening for fitting into a pipeline is formed on one side.
像这样，马达30的动力通过同步带传动机构传递至丝杆61，在丝杆61和丝杆螺母62组成滚珠丝杠副中，同步带传动机构带动丝杆61转动，从而驱使丝杆螺母62通过推杆63带动胶塞220前进或是后退，实现造影剂的注射或是抽取。另外，丝杆61还可以进一步地插通下壳体11的后端面向后方延伸，在该丝杆61的末端上设置有旋钮66，该旋钮66是可由人工手动操作的手动旋钮，通过该旋钮66可以手段旋转丝杆61。在设备断电情况下，可以通过手动操作旋钮66转动推杆63后退至后极限位置，从而使胶塞220移动至针筒210的末端，由此能方便将针筒210从针筒托架上取下。Like this, the power of the motor 30 is transmitted to the screw rod 61 through the synchronous belt transmission mechanism. In the ball screw pair composed of the screw rod 61 and the screw nut 62, the synchronous belt transmission mechanism drives the screw rod 61 to rotate, thereby driving the screw nut 62 The rubber plug 220 is driven forward or backward by the push rod 63 to realize the injection or extraction of the contrast agent. In addition, the screw rod 61 can be further inserted through the rear end of the lower housing 11 to extend backward, and a knob 66 is arranged on the end of the screw rod 61, and the knob 66 is a manual knob that can be manually operated. 66 can rotate screw mandrel 61 by means. When the equipment is powered off, the push rod 63 can be turned back to the rear limit position by manually operating the knob 66, so that the rubber plug 220 can move to the end of the syringe 210, thereby facilitating the removal of the syringe 210 from the syringe bracket remove.
图5示出了设置有注射头100的高压注射器套件。如图5所示，高压注射器套件包括注射头100、高压注射器200、造影剂管路300以及插瓶针400。具体而言，在造影剂管路300上设置有三通接头310。该三通接头310的第一端口通过管路连接高压注射器200的注射器接口，第二端口通过管路连接***药液瓶的插瓶针400，第三端口通过管路连接微导管，并通过微导管向患者输出造影剂，此时设置于传感器座73上的气泡传感器311还起到夹持固定管路的作用。FIG. 5 shows a high pressure syringe kit provided with an injection head 100 . As shown in FIG. 5 , the high-pressure injector set includes an injection head 100 , a high-pressure injector 200 , a contrast medium pipeline 300 and a bottle insertion needle 400 . Specifically, a three-way joint 310 is provided on the contrast medium pipeline 300 . The first port of the three-way joint 310 is connected to the syringe interface of the high-pressure syringe 200 through the pipeline, the second port is connected to the bottle insertion needle 400 inserted into the liquid medicine bottle through the pipeline, and the third port is connected to the microcatheter through the pipeline, and through the micro The catheter outputs the contrast agent to the patient, and at this time, the air bubble sensor 311 arranged on the sensor seat 73 also plays the role of clamping and fixing the pipeline.
与上述气泡传感器311同样地，在三通接头310的第二端口与插瓶针400之间设置有多个夹状的气泡传感器312。气泡传感器311主要用于检测从三通接头310向患者输出的造影剂中有无气泡，而气泡传感器312主要用于检测插瓶针400与三通接头310之间有无气泡，如果监测到管路中存在气泡则输出高电平，注射头100会停止注射，防止气泡被注射入人体血管。Similar to the air bubble sensor 311 described above, a plurality of clip-shaped air bubble sensors 312 are provided between the second port of the tee joint 310 and the bottle insertion needle 400 . The air bubble sensor 311 is mainly used to detect whether there are bubbles in the contrast agent output from the three-way joint 310 to the patient, and the air bubble sensor 312 is mainly used to detect whether there are air bubbles between the bottle insertion needle 400 and the three-way joint 310. If there are air bubbles in the path, a high level will be output, and the injection head 100 will stop the injection to prevent air bubbles from being injected into human blood vessels.
以上的具体实施方式对本实用新型的目的、技术方案和有益效果进行了进一步详细说明，应当理解的是，以上仅为本实用新型的一种具体实施方式而已，并不限于本实用新型的保护范围，在不脱离本实用新型的基本特征的宗旨下，本实用新型可体现为多种形式，因此本实用新型中的实施形态是用于说明而非限制，由于本实用新型的范围由权利要求限定而非由说明书限定，而且落在权利要求界定的范围，或其界定的范围的等价范围内的所有变化都应理解为包括在权利要求书中。凡在本实用新型的精神和原则之内的，所做出的任何修改、等同替换、改进等，均应包含在本实用新型的保护范围之内。The above specific embodiments have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above is only a specific embodiment of the present utility model, and is not limited to the protection scope of the present utility model , without departing from the purpose of the basic features of the utility model, the utility model can be embodied in various forms, so the implementation form in the utility model is for illustration rather than limitation, because the scope of the utility model is defined by the claims All changes that are not limited by the description, and fall within the range defined by the claims, or the range equivalent to the range defined by them, should be understood as being included in the claims. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims (10)

  1. 一种高压注射器用注射头，其特征在于，An injection head for a high-pressure syringe, characterized in that,
    所述注射头包括：The injection head includes:
    壳体：case:
    支持于所述壳体的内部的机架；a frame supported inside the housing;
    安装于所述机架的马达；a motor mounted on the frame;
    以位于所述马达的水平方向侧方的形式设置于所述机架的编码器；an encoder disposed on the frame in a manner positioned laterally of the motor in the horizontal direction;
    以位于所述马达的斜下方的形式设置于所述机架的丝杆组件；以及a threaded screw assembly disposed on the frame in a manner obliquely below the motor; and
    将所述马达的动力传递至所述丝杆组件的同步带传动机构；transmitting the power of the motor to the synchronous belt transmission mechanism of the screw assembly;
    所述丝杆组件包括转动自如地插通所述机架的丝杆、在所述丝杆转动时沿所述丝杆的轴向带动注射器的胶塞的移动件以及支持所述移动件的滑轨；The screw assembly includes a screw that is rotatably inserted through the frame, a moving part that drives the rubber stopper of the syringe along the axial direction of the screw when the screw rotates, and a slider that supports the moving part. rail;
    所述壳体的前端设置有夹持所述注射器的针筒的夹爪和支持所述针筒注射器的托架。The front end of the housing is provided with jaws for clamping the syringe of the syringe and a bracket for supporting the syringe of the syringe.
  2. 根据权利要求1所述的高压注射器用注射头，其特征在于，The injection head for high-pressure injector according to claim 1, characterized in that,
    所述移动件由设置于所述丝杆的丝杆螺母和与所述丝杆螺母连接的推杆组成；The moving part is composed of a screw nut arranged on the screw rod and a push rod connected with the screw nut;
    所述推杆套设于所述丝杆的外侧且滑动自如地插通所述壳体的前端。The push rod is sleeved on the outer side of the screw rod and inserted through the front end of the casing freely and slidably.
  3. 根据权利要求2所述的高压注射器用注射头，其特征在于，The injection head for a high-pressure injector according to claim 2, wherein:
    所述移动件还包括滑块，所述丝杆螺母通过所述滑块滑动自如地支持于所述滑轨；The moving part further includes a slider, and the screw nut is slidably supported on the slide rail through the slider;
    所述滑轨上设置有引导所述滑块的导杆。A guide rod for guiding the slider is arranged on the slide rail.
  4. 根据权利要求1所述的高压注射器用注射头，其特征在于，The injection head for high-pressure injector according to claim 1, characterized in that,
    所述同步带传动机构包括设置于所述马达的输出轴的末端的第一同步齿轮、设置于所述丝杆的后部的第二同步齿轮以及将所述第一同步齿轮与所述第二同步齿轮传动连接的皮带。The synchronous belt transmission mechanism includes a first synchronous gear arranged at the end of the output shaft of the motor, a second synchronous gear arranged at the rear of the screw rod, and connecting the first synchronous gear with the second synchronous gear. Synchronized gear drives connected belts.
  5. 根据权利要求1所述的高压注射器用注射头，其特征在于，The injection head for high-pressure injector according to claim 1, characterized in that,
    所述同步带传动机构还包括设置于所述机架的张紧轮。The synchronous belt transmission mechanism also includes a tension pulley arranged on the frame.
  6. 根据权利要求1所述的高压注射器用注射头，其特征在于，The injection head for high-pressure injector according to claim 1, characterized in that,
    所述丝杆的末端从所述壳体的后端伸出并设置有旋钮。The end of the threaded rod protrudes from the rear end of the housing and is provided with a knob.
  7. 根据权利要求1所述的高压注射器用注射头，其特征在于，The injection head for high-pressure injector according to claim 1, characterized in that,
    所述托架上设置有传感器座；The bracket is provided with a sensor seat;
    所述传感器座上设置有气泡传感器。An air bubble sensor is arranged on the sensor seat.
  8. 根据权利要求2所述的高压注射器用注射头，其特征在于，The injection head for a high-pressure injector according to claim 2, wherein:
    所述壳体的上部形成为具有向后方倾斜的倾斜面的梯台形状；The upper part of the housing is formed in a stepped shape with an inclined surface inclined to the rear;
    所述壳体的顶部设置有停止键，所述倾斜面上设置有用于控制所述推杆的前后运动的控制按 键。The top of the housing is provided with a stop key, and the inclined surface is provided with a control button for controlling the forward and backward movement of the push rod.
  9. 根据权利要求1所述的高压注射器用注射头，其特征在于，The injection head for high-pressure injector according to claim 1, characterized in that,
    所述注射头还配有用于供电的电源箱；The injection head is also equipped with a power supply box for power supply;
    所述注射头的控制电路设置于所述电源箱内。The control circuit of the injection head is arranged in the power supply box.
  10. 根据权利要求1所述的高压注射器用注射头，其特征在于，The injection head for high-pressure injector according to claim 1, characterized in that,
    所述壳体的一侧设置有手柄。A handle is provided on one side of the housing.
PCT/CN2022/118449 2021-09-13 2022-09-13 Injector head for high-pressure injector WO2023036337A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215961492U (en) * 2021-09-13 2022-03-08 临床支持有限公司 Injection head for high-pressure injector

Citations (6)

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Publication number Priority date Publication date Assignee Title
US20040085215A1 (en) * 1998-10-29 2004-05-06 Medtronic Minimed, Inc. Method and apparatus for detecting errors, fluid pressure, and occlusions in an ambulatory infusion pump
WO2016183342A1 (en) * 2015-05-13 2016-11-17 Smiths Medical Asd, Inc. High accuracy syringe pumps
CN207462409U (en) * 2017-03-13 2018-06-08 深圳安特医疗股份有限公司 High pressure injector head and high pressure injector
CN210125058U (en) * 2019-03-20 2020-03-06 南昌科悦企业管理咨询有限公司 Syringe pipe inhales medicine device
CN111629769A (en) * 2017-11-24 2020-09-04 株式会社根本杏林堂 Injection head and liquid medicine syringe using same
CN215961492U (en) * 2021-09-13 2022-03-08 临床支持有限公司 Injection head for high-pressure injector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040085215A1 (en) * 1998-10-29 2004-05-06 Medtronic Minimed, Inc. Method and apparatus for detecting errors, fluid pressure, and occlusions in an ambulatory infusion pump
WO2016183342A1 (en) * 2015-05-13 2016-11-17 Smiths Medical Asd, Inc. High accuracy syringe pumps
CN207462409U (en) * 2017-03-13 2018-06-08 深圳安特医疗股份有限公司 High pressure injector head and high pressure injector
CN111629769A (en) * 2017-11-24 2020-09-04 株式会社根本杏林堂 Injection head and liquid medicine syringe using same
CN210125058U (en) * 2019-03-20 2020-03-06 南昌科悦企业管理咨询有限公司 Syringe pipe inhales medicine device
CN215961492U (en) * 2021-09-13 2022-03-08 临床支持有限公司 Injection head for high-pressure injector

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