Injection head, needle cylinder loading mechanism and high-pressure injector

Abstract

The invention provides an injection head, a needle cylinder loading mechanism and a high-pressure injector, and relates to the field of medical instruments.The injection head comprises a shell, a supporting frame assembly and the needle cylinder loading mechanism, the supporting frame assembly comprises a mounting frame, a push rod and a power unit, and the mounting frame is provided with a push rod sliding groove and a step groove; the needle cylinder loading mechanism comprises a loading seat and a loading channel groove, a mounting boss is arranged on the lower surface of the rear end of the loading seat, the mounting boss is positioned in the step groove in an assembly state, and the loading channel groove is communicated with the push rod sliding groove in the X direction. The needle cylinder loading mechanism is applied to the injection head, and the high-pressure injector comprises the injection head. The technical problem that in the prior art, an injection head of a high-pressure injector is poor in sealing performance can be solved at least.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to an injection head, a syringe loading mechanism and a high-pressure injector. Background Art

[0002] The medical imaging diagnostic equipment currently used includes CT (Computer Tomography), MRI (Magnetic Resonance Imaging), PET (Positron Emission Tomography), angiography, MRA (Magnetic Resonance Angiography), etc. In order to observe the location of the lesion more clearly, a high-pressure syringe is used to inject contrast agent and saline into the patient's body.

[0003] High-pressure injectors generally include a power box, a frame, an injection head, cables and other parts, among which the injection head can rotate relative to the frame. Usually, medical personnel rotate the loading part of the injection head to the highest vertical position, load the empty syringe of contrast agent and saline, and then connect the J-tube or puncture device, hold the bottle of saline and contrast agent with the left hand, and press the function button on the injection head with the right hand to aspirate the medicine; after aspirating the medicine, remove the medicine bottle, puncture device or J-tube, and then connect the long spiral tube (T-shaped spiral tube) to the syringe of contrast agent and saline, and press the function button on the injection head with the right hand to empty the medicine; after emptying, rotate the injection head down to below the horizontal line of the rotation axis, and then perform the injection operation.

[0004] Specifically, the standard usage steps for medical personnel are as follows:

[0005] Step 1: Rotate the injection head to the highest vertical position;

[0006] Step 2: Load the empty syringe onto the injection head;

[0007] Step 3: Connect the puncture device or J-tube to the empty syringe, grab the bottle of saline or contrast agent with your left hand, and operate the function button on the injection head with your right hand to aspirate the drug;

[0008] Step 4: Remove the saline and contrast agent bottles and connect the T-shaped long spiral tube;

[0009] Step 5: Operate the function button on the injection head to perform emptying operation;

[0010] Step 6: Rotate the injection head to below the horizontal line of the rotation axis;

[0011] Step 7: Connect the spiral tube to the indwelling needle on the patient's hand and then perform the injection operation (the injection operation is usually performed remotely in the control room);

[0012] Step 8: Remote control injection;

[0013] Step 9: Unscrew the Noor connector connected to the indwelling needle and remove the spiral tube and syringe.

[0014] The injection head is the most core component of the entire high-pressure injector. Its injection accuracy, injection stability, service life, and maintenance convenience are crucial.

[0015] However, when using a high-pressure syringe, it is difficult to avoid the problem of contrast agent and saline leaking onto the injection head. For example, the drug suction operation in step 3, the puncture of the rubber stopper of the medicine bottle in step 4, and the emptying operation in step 5 will inevitably cause the contrast agent to stick to the injection head or invade the inside of the injection head; when removing the syringe in step 9, contrast agent and saline may also leak out.

[0016] The sticky contrast agent often causes the loading mechanism to fail or affects the use effect; however, the syringe loading mechanism (syringe loading seat) of the existing high-pressure syringe injection head is often complex in structure and has multiple parts. Among these parts, the part that plays the main functional role in loading is hidden inside the loading seat and cannot be completely sealed. Once the contrast agent adheres to the loading parts of the loading seat, it may cause loading failure. In addition, this syringe loading mechanism is not easy to clean and maintain after the contrast agent is adhered, because its parts have small internal space and too many fine seam features. At the same time, the injection head of the existing high-pressure syringe does not have a good sealing measure between the syringe loading mechanism and the inside of the injection head. When the contrast agent or saline invades the inside of the injection head, it will most likely cause the failure of the internal electronic components, thereby causing the high-pressure syringe to fail. In addition, the injection heads of existing high-pressure syringes are often only compatible with the loading of disposable empty syringes, and are not compatible with the use of pre-filled contrast agents and pre-filled saline solutions; in addition, the injection heads of existing high-pressure syringes have no fool-proof design, and the structure does not ensure that the scale faces upward when the syringe is loaded; and the overall height of the injection heads of existing high-pressure syringes is fixed and cannot be adjusted, etc., all of which make the convenience of using existing high-pressure syringes need to be improved.

[0017] In summary, the injection head of the existing high-pressure injector has at least the following two types of technical problems:

[0018] (1) Poor sealing performance, mainly manifested in: ① The syringe loading mechanism is complex, the space between parts is small and there are many fine gaps, so that the contrast agent is difficult to clean and maintain after it adheres to the parts; ② There is no sealing measure or the sealing is not complete between the syringe loading mechanism and the inside of the injection head, which has a high risk of contrast agent and saline invading the inside of the injection head;

[0019] (2) The ease of use is insufficient, mainly reflected in the following aspects: ① The syringe loading mechanism is only compatible with the loading of disposable empty syringes, and does not support the use of pre-filled contrast agent syringes or pre-filled saline syringes; ② The syringe loading mechanism has no fool-proof design and cannot ensure that the syringe scale is facing upward during loading; ③ The overall height of the injection head is fixed and cannot be adjusted, and the ease of use needs to be improved. Summary of the invention

[0020] The object of the present invention is to provide an injection head, a syringe loading mechanism and a high-pressure injector, so as to at least alleviate the technical problem of poor sealing of the injection head of the high-pressure injector existing in the prior art.

[0021] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0022] In a first aspect, an embodiment of the present invention provides an injection head, which is applied to a high-pressure syringe and includes a housing, a support frame assembly, and a syringe loading mechanism.

[0023] Specifically, with the length direction of the shell as the X direction and the front-to-back direction, the width direction of the shell as the Y direction and the left-right direction, and the height direction of the shell as the Z direction and the up-down direction: the support frame assembly includes a mounting frame, a push rod and a power unit; a push rod slide groove penetrating in the X direction is provided inside the mounting frame, and two side surfaces opposite to each other at the front end Y of the push rod slide groove are provided with inwardly protruding ribs to separate a step groove at the front end of the push rod slide groove; the mounting frame is installed on the shell, the push rod is installed inside the push rod slide groove, the power unit is installed inside the shell and is connected to the rear end power of the push rod, the power unit can push and pull the push rod so that the push rod can reciprocate along the X direction in the push rod slide groove; the syringe loading mechanism includes a loading seat, the upper surface of the loading seat is provided with a loading channel groove for loading an injection syringe, the loading channel groove penetrates the loading seat along the X direction, and a mounting boss is provided on the lower surface of the rear end of the loading seat.

[0024] In the assembled state, the mounting boss is positioned in the step groove, and the loading channel groove is connected to the push rod sliding groove in the X direction.

[0025] In this embodiment, the above-mentioned mounting frame and loading seat are provided, and the two are positioned and connected in a manner that the mounting boss of the loading seat is positioned in the step groove of the mounting frame. After connection, the loading channel groove is connected to the push rod slide groove in the X direction, and the main loading structure for loading the injection syringe is the loading channel groove of the loading seat. The loading structure is simple and has fewer fine gaps, thereby making cleaning easier. When cleaning, the loading seat can even be detached from the shell of the injection head and the support frame assembly and removed. After removal, the loading seat can be cleaned independently. Cleaning is not limited by the shell space of the injection head, and cleaning is more thorough.

[0026] Optionally, a step groove bottom plate is provided at the bottom of the step groove, and the step groove bottom plate is fixed or integrally connected to the mounting frame. A Z-direction through-hole screw hole is provided on the step groove bottom plate, and the screw hole is used to screw in a screw in the assembled state to fix the mounting boss in the step groove.

[0027] Optionally, a Y-direction partition plate fixedly connected to the mounting frame is provided inside the push rod slideway, a push rod through hole extending in the X direction is provided on the Y-direction partition plate, a clamping ring surrounding the push rod through hole is also installed on the front end surface of the Y-direction partition plate, and the push rod passes through the push rod through hole and the clamping ring;

[0028] The shell includes an upper shell and a lower shell connected in the Z direction, the mounting frame is fixed between the upper shell and the lower shell, and the area where the push rod slide is located at the front end of the clamping ring and the upper surface of the loading seat are exposed outside the inner cavity of the shell, the push rod slide and the push rod are respectively located in the area outside the clamping ring and the power unit are all arranged in the inner cavity of the shell.

[0029] Optionally, a mounting opening is further provided at a portion of the bottom of the lower shell body corresponding to the area of ​​the push rod slide groove located at the front end of the clamping ring, and a slide groove bottom support plate is detachably mounted in the mounting opening.

[0030] Optionally, a push rod clamp is provided at the front end of the push rod, and the push rod clamp is used to clamp the rear end portion of the piston rod in the injection syringe.

[0031] Optionally, in the loading seat, the loading channel groove includes a main channel groove, and cylinder spring pressure pieces are respectively provided on two side walls of the main channel groove Y which are symmetrical upward.

[0032] Optionally, the cylinder spring-pressing piece is in the shape of a long strip extending along the Z direction and spaced from the side wall of the main channel groove; the upper end of the cylinder spring-pressing piece is fixedly connected to the upper end of the side wall of the main channel groove, and the end face of the lower end of the cylinder spring-pressing piece is an arc surface convex toward the inner direction of the main channel groove.

[0033] Optionally, in the Z direction, the bottom surface of the main channel groove is an arc surface; with the outer diameter of the barrel of the injection syringe being d1, the bottom diameter of the main channel groove being d2, and the minimum Y-direction spacing between the lower ends of the elastic pressure parts of the barrel on the symmetrical two side walls of the main channel groove being d3, the injection syringe satisfies d1=d2>d3 when it is not loaded.

[0034] Optionally, an end step with an increased outer diameter is provided at the rear end of the barrel of the injection syringe; in the loading seat, the loading channel groove includes a main channel groove and a loading seat end groove which are interconnected in the X direction, the loading seat end groove is located at the rear end of the main channel groove, and the inner diameter of the loading seat end groove is larger than the inner diameter of the main channel groove, and the Z-direction depth of the loading seat end groove is larger than the Z-direction depth of the main channel groove; when the injection syringe is in a loaded state, the barrel of the injection syringe is clamped in the main channel groove, and the end step of the injection syringe is clamped in the loading seat end groove.

[0035] Optionally, in the X direction, an end spring pressure piece is provided on the front end surface or the rear end surface of the groove of the end of the loading seat.

[0036] Optionally, the end spring-pressing piece is in the shape of a long strip extending along the Z direction and spaced from the inner wall of the groove, the lower end of the end spring-pressing piece is fixedly connected to the front end face of the groove or the lower end of the rear end face of the groove, and the end face of the upper end of the end spring-pressing piece is an arc surface protruding toward the inside of the end groove of the loading seat.

[0037] Optionally, the X-direction spacing between the front end face of the groove and the rear end face of the groove is L1; and, one of the front end face of the groove and the rear end face of the groove that is fixedly connected to the lower end of the end spring-pressing member is used as the end spring-pressing member setting surface, and the other end face is used as the symmetric plane of the end spring-pressing member setting surface, and the X-direction spacing between the symmetric plane and the upper end arc surface of the end spring-pressing member is L2; ​​in the injection syringe, along the axial direction of the barrel, the front and rear end face spacing of the end step is L, then: L1>L>L2.

[0038] Optionally, an optical coupler is provided inside the loading channel groove of the loading seat, and a light outlet of the detection light of the optical coupler is located in the Z-direction plane;

[0039] A controller is disposed inside the housing; the controller comprises an optical coupling detection unit and an information processing unit; the optical coupling detection unit is connected to the optical coupler, and the optical coupling detection unit and the power unit are both connected to the information processing unit;

[0040] When the loading channel slot is empty, the optical coupler sends an empty signal to the optical coupler detection unit, and the optical coupler detection unit receives and transmits the empty signal to the information processing unit. The information processing unit receives the empty signal and controls the push rod to retreat along the X direction to an empty state.

[0041] Optionally, the controller further includes a storage unit and an alarm unit;

[0042] The storage unit pre-stores drug spectrum detection characteristic information;

[0043] The optical coupler detection unit is also capable of receiving and analyzing the spectrum information detected by the optical coupler, and transmitting the spectrum information to the information processing unit;

[0044] The information processing unit is capable of retrieving the medicine spectrum detection characteristic information pre-stored in the storage unit, and comparing the received spectrum information with the retrieved characteristic information, and outputting an alarm signal to the alarm unit and the power unit when the spectrum information does not match the characteristic information;

[0045] The alarm unit sends out an alarm signal when receiving the alarm signal, and the power unit is locked in a non-injection state when receiving the alarm signal.

[0046] Optionally, the syringe loading mechanism further comprises a pre-filling assembly; the pre-filling assembly comprises a pre-filled syringe adapter;

[0047] The prefilled syringe adapter includes an adapter seat, and a prefilled syringe loading groove for loading prefilled syringes is provided on the upper surface of the adapter seat. The prefilled syringe loading groove passes through the adapter seat along the X direction. When the adapter is assembled, the adapter seat is positioned in the loading channel groove of the syringe loading mechanism.

[0048] Optionally, an end boss is provided on the lower surface of the rear end of the adapter seat, and in the assembled state, the end boss is positioned in the end groove of the loading seat.

[0049] Optionally, in the loading seat, groove undercut steps protruding toward the middle of the groove at the end of the loading seat are respectively provided on the upper part of the two side walls symmetrically in the Y direction at the end of the loading seat; along the Z direction, the side surface of the side wall located above the groove undercut step forms a groove inclined guide surface that gradually increases the inner diameter of the groove at the end of the loading seat from the groove undercut step upward, and the side surface located below the groove undercut step forms a groove guide side surface;

[0050] In the adapter seat, the side surface of the end boss includes an elastic buckle, and the elastic buckle is provided with a step portion on the radial outer surface of the adapter seat. In the assembled state, the step portion of the elastic buckle is engaged with the Z-direction bottom of the inverted step of the groove.

[0051] Optionally, in the adapter seat, the pre-filled syringe loading slot includes a main loading slot, and spring buckles are respectively provided on two side walls of the main loading slot Y that are symmetrical upward.

[0052] Optionally, the rear end of the barrel of the prefilled syringe is provided with an end collar with an increased outer diameter;

[0053] In the adapter seat, the prefilled syringe loading slot includes a main loading slot and an adapter end groove which are interconnected in the X direction, and the adapter end groove is located at the rear end of the main loading slot; the Z-direction depth of the adapter end groove is greater than the Z-direction depth of the main loading slot; in the prefilled syringe loading state, the barrel of the prefilled syringe is clamped in the main loading slot, and the end clamp ring of the prefilled syringe is clamped in the adapter end groove.

[0054] Optionally, an end snap buckle is provided on the front side surface or the rear side surface of the end groove of the adapter.

[0055] Optionally, an optical coupler clearance groove that does not block the detection light of the optical coupler is provided on the peripheral wall of the adapter seat, and the Z-direction depth of the prefilled syringe loading groove satisfies that when the prefilled syringe is loaded in the prefilled syringe loading groove, the detection light of the optical coupler is blocked by the prefilled syringe.

[0056] Optionally, top plates are respectively provided on the tops of both sides of the adapter seat in the X direction, a first pressure column is provided on the bottom surface of one of the top plates, and a second pressure column is provided on the bottom surface of the other top plate;

[0057] A sensor group is provided on the upper surface of the loading seat at the two sides of the loading channel groove; the upper surface of the loading seat at the two sides of the loading channel groove are respectively the upper surface of the first side in the X direction and the upper surface of the second side in the X direction, and the sensor group includes a first sensor and a second sensor provided on the upper surface of the first side and spaced apart in the X direction, and a third sensor and a fourth sensor provided on the upper surface of the second side and spaced apart in the X direction;

[0058] When the adapter is in a loaded state, the first pressure column contacts the first sensor or the second sensor to trigger the corresponding sensor, and the second pressure column contacts the third sensor or the fourth sensor to trigger the corresponding sensor.

[0059] Optionally, a controller is provided inside the housing of the injection head; the controller comprises a storage unit and an information processing unit connected to each other;

[0060] The storage unit pre-stores a plurality of sensor triggering combination forms to represent various adapter models respectively, and presets a plurality of push rod retreat distances in correspondence with the plurality of sensor triggering combination forms;

[0061] Each sensor in the sensor group and the power unit are connected to the information processing unit, and the information processing unit can receive the signal sent after the sensor group is triggered, and retrieve the information pre-stored in the storage unit, and compare the received signal with the pre-stored combination of the sensor triggers, match the corresponding push rod retreat distance, and transmit it to the power unit. After receiving the push rod retreat distance information instruction, the power unit retreats the push rod accordingly.

[0062] Optionally, a force sensor for detecting the injection pressure when injecting the medicinal solution is provided on the push rod.

[0063] In a second aspect, an embodiment of the present invention provides a syringe loading mechanism, which is applied to the injection head described in any one of the aforementioned embodiments.

[0064] In a third aspect, an embodiment of the present invention provides a high-pressure injector, comprising the injection head described in any one of the aforementioned embodiments.

[0065] More preferably, the high-pressure injector also includes a cable, a frame, a height adjustment mechanism and a power box; the height adjustment mechanism is installed on the top of the power box, the frame is installed on the height adjustment mechanism, the injection head is installed on the frame, and the injection head can rotate in the vertical direction relative to the rotating axis on the frame; the cable connects the injection head and the power box. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0067] Figure 1 It is a schematic diagram of the overall structure of the high-pressure injector;

[0068] Figure 2 This is a schematic diagram of the use of a high-pressure syringe when drawing medicine;

[0069] Figure 3 A schematic diagram of the use of a high-pressure syringe when injecting liquid medicine;

[0070] Figure 4 A schematic diagram of the loading and use of a pre-filled contrast medium syringe and a pre-filled saline syringe for the injection head;

[0071] Figure 5 It is the overall structural diagram of the injection head;

[0072] Figure 6 Schematic diagram of the bottom structure of the injection head;

[0073] Figure 7 is a first angle axonometric view of the syringe loading mechanism;

[0074] Figure 8 is a second angle axonometric view of the syringe loading mechanism;

[0075] Fig. 9 It is a third angle axonometric view of the syringe loading mechanism;

[0076] Fig.10 for Fig. 9 A top view of the local structure of the right side of the middle syringe loading mechanism;

[0077] Fig.11 for Fig. 9 A cross-sectional view of the groove portion at the end of the loading seat of the middle syringe loading mechanism;

[0078] Fig.12 for Fig.11 A partial enlarged view of the structure within the middle dotted circle;

[0079] Fig.13 is a first angle axonometric view of a contrast medium syringe;

[0080] Fig.14 is a second angle axonometric view of the contrast medium syringe;

[0081] Fig.15 It is a schematic diagram of the overall structure of the end step of the contrast agent syringe;

[0082] Fig.16 This is a schematic diagram of loading the factory empty syringes of the physiological saline syringe and the contrast medium syringe;

[0083] Figures 17 to 33 A schematic diagram of the loading process of loading a contrast medium syringe into a loading seat;

[0084] Fig.34 This is an axonometric view of the overall structure of the pre-filled contrast medium syringe;

[0085] Fig.35 for Fig.34 Schematic diagram of the assembly of a local portion of the end collar of a pre-filled contrast agent syringe shown in FIG.

[0086] Fig.36 for Fig.35 Side view of

[0087] Figures 37 to 42 It is a multi-angle structural schematic diagram of the pre-filled contrast agent syringe adapter; wherein, Fig.40 for Fig.39 A partial enlarged view of the structure in the middle circle;

[0088] Figures 43 to 57 The figure is a schematic diagram of the loading process of loading the pre-filled contrast agent syringe adapter into the loading seat; wherein, Fig.47 for Fig.46 A partial enlarged view of the structure within the dotted circle in the middle. Fig.51 for Fig.50 A partial enlarged view of the structure within the middle dotted frame;

[0089] Figure 58 to Figure 63 A schematic diagram of a loading process for loading a prefilled contrast medium syringe into a prefilled contrast medium syringe adapter;

[0090] Fig.64 It is an axonometric view of the overall structure of the support frame assembly in the injection head;

[0091] Fig.65 and Fig.66 for Fig.64 A schematic diagram of the specific structure of the step groove in the support frame assembly shown;

[0092] Figures 67 to 72 A schematic diagram of the installation process of installing the loading seat in the syringe loading mechanism on the support frame assembly;

[0093] Fig.73 Schematic diagram of the matching relationship between the end step of the contrast agent syringe, the positioning boss of the loading seat, and the step groove on the mounting frame in the support frame assembly when injecting liquid medicine into the high-pressure syringe.

[0094] Icons: A-high-pressure syringe; B-normal saline syringe; C-large trocar; D-bottle of normal saline; E-contrast medium syringe; F-small trocar; G-bottle of contrast medium; H-pre-filled contrast medium syringe adapter; I-pre-filled contrast medium syringe; J-pre-filled normal saline syringe adapter; K-pre-filled normal saline syringe;

[0095] A1-injection head; A2-cable; A3-frame; A4-height adjustment mechanism; A5-power box;

[0096] 100-syringe loading mechanism; 110-loading seat; 111-contrast agent main channel groove; 112-physiological saline main channel groove; 113-cylinder body spring-pressing member; 114-end spring-pressing member; 115-end groove of loading seat; 1151-rear end face of groove; 1152-front end face of groove; 1153-oblique guide face of groove; 1154-guide side face of groove; 1155-recess undercut step; 116-arc profile at bottom of groove; 117-mounting boss; 1171-pull-press end of boss; 1172-left side face of boss; 1173-right side face of boss; 1174-bottom face of boss; 1175-pushing face of boss; 1176-top face of boss; 120-sensor group; 121-first sensor; 122-second sensor; 123 - third sensor; 124- fourth sensor; 130- optical coupler; 131- detection light; 2- support frame assembly; 21- push rod; 211- push rod clamp; 22- mounting frame; 220- push rod slide; 221- step groove; 2211- step groove rear pull support surface; 2212- step groove left side; 2213- step groove right side; 2214- step groove bottom surface; 22141- countersunk screw hole; 2215- step groove front push support surface; 2216- step groove top surface; 2210- step groove bottom plate; 22101- Y-direction partition; 23- power unit; 3- upper shell; 4- lower shell; 5- cross arm column; 6- labyrinth; 7- clamp ring; 8- slide groove bottom support plate; 9- electrical plug; 10- fastener;

[0097] E1-contrast agent syringe body; E2-contrast agent syringe scale; E3-end step; E31-step pressure surface; E32-step guide side; E33-step tension surface; E34-step upper contour; E35-step concave end surface; E36-concave step; E37-step lower contour; E4-contrast agent syringe matching piston rod end; E5-contrast agent syringe matching piston rod;

[0098] I1-pre-filled contrast agent syringe body; I2-pre-filled contrast agent syringe scale; I3-end clamp ring; I31-clamp ring pressure surface; I32-clamp ring side guide surface; I33-clamp ring rear side surface; I34-clamp ring top surface; I35-clamp ring bottom edge arc profile; I4-pre-filled contrast agent syringe matching piston rod end; I5-pre-filled contrast agent syringe matching piston rod; I6-syringe end arc profile;

[0099] H1-inner wall of pre-filled contrast agent syringe adapter; H11-inner wall of the barrel; H12-arc-shaped wall at the end; H13-spring buckle; H14-extrusion clearance groove; H15-optical coupling clearance groove; H2-end boss; H21-handle; H22-elastic buckle; H23-oblique guide surface of boss; H24-side guide surface of boss; H25-concave end surface of boss; H26-step surface; H27-convex end surface; H28-arc profile at the bottom of boss; H29-pushing surface of end boss; H3-end groove of adapter; H31-end spring buckle; H32-rear side surface of groove; H33-pressure surface at the front side of groove; H34-arc profile at the bottom of groove; H35-side guide surface of groove; H36-end clearance groove; H4-outer wall column; H5-top plate; H51-top plane; H52-first pressure column; H53-second pressure column. DETAILED DESCRIPTION

[0100] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0101] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0102] It should be noted that like reference numerals and letters denote similar items in the drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0103] In the description of the present invention, it should be noted that the terms "proximal end", "distal end", "front end", "rear end", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0104] Particularly, in the present invention, during surgery, the front end of the medical instrument is the distal end, and the rear end of the medical instrument is the proximal end.

[0105] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0106] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; for an electrically connected structure, the "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0107] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0108] Figure 1 The overall structure diagram of the high-pressure injector mainly includes an injection head A1, a cable A2, a frame A3 and a power box A5. The injection head A1 is mounted on the frame A3, and the injection head A1 can rotate in the vertical direction relative to the rotating shaft on the frame A3, so as to realize the operation of drug suction, emptying and injection; the frame A3 is mounted on the power box A5; the cable A2 connects the injection head A1 and the power box A5, and preferably, the frame A3 is a hollow structure, and after the cable A2 comes out of the injection head A1, it is connected to the power box A5 along the hollow inner cavity of the frame A3.

[0109] Figure 2 This is a schematic diagram of how to use a high-pressure syringe to draw medicine. Figure 2 In the structure shown, the injection head A1 of the high-pressure syringe A is loaded with a saline syringe B and a contrast medium syringe E. The needle of the saline syringe B is connected to the bottle of saline D through a large puncture device C, and the needle of the contrast medium syringe E is connected to the bottle of contrast medium G through a small puncture device F. When inhaling medicine, in order to avoid inhaling too much air, the syringe loaded on the injection head A1 needs to be rotated to the highest position in the vertical direction; after the inhalation of medicine is completed, the liquid medicine bottles (bottle of saline D and bottle of contrast medium G), puncture devices (large puncture device C and small puncture device F) are removed, and the T-shaped spiral tube is connected, and the syringe is still kept in Figure 2 The highest position is shown, and the emptying operation can be completed by operating the emptying button on the injection head A1.

[0110] Figure 3This is a schematic diagram of how to use a high-pressure syringe to inject liquid medicine. Rotate the injection head to a position below the horizontal line of its rotation axis, connect the T-shaped spiral tube to the indwelling needle on the patient's hand, and then start the injection.

[0111] When using the injection head A1 of the high-pressure syringe, leakage of contrast agent and saline solution is often unavoidable when aspirating, emptying, connecting the spiral tube and removing the syringe, causing the contrast agent to adhere to the injection head or invade the inside of the injection head.

[0112] As described in the background technology section of this specification, the applicant has carefully considered the problem of poor sealing performance of the injection head of the existing high-pressure injector, and in the first aspect of this application, provides the following injection head A1, which is applied to the high-pressure injector A:

[0113] Embodiment 1

[0114] This embodiment provides an injection head, referring to Figures 4 to 6 as well as Fig.64 The injection head includes a shell, a support frame assembly 2 and a syringe loading mechanism 100.

[0115] like Figure 6 As shown, the length direction of the shell is the X direction and the front-to-back direction, the width direction of the shell is the Y direction and the left-right direction, and the height direction of the shell is the Z direction and the up-down direction:

[0116] refer to Figure 64 to Figure 73 The support frame assembly 2 includes a mounting frame 22, a push rod 21 and a power unit 23; a push rod slot 220 that runs through the mounting frame 22 is provided inside the mounting frame 22, and convex ribs protruding inward are provided on the two side surfaces opposite to each other at the front end Y of the push rod slot 220 to separate a step slot 221 at the front end of the push rod slot 220; the mounting frame 22 is installed on the shell, the push rod 21 is installed inside the push rod slot 220, the power unit 23 is installed inside the shell and is connected to the rear end power of the push rod 21, and the power unit 23 can push and pull the push rod 21 so that the push rod 21 can move back and forth along the X direction in the push rod slot 220.

[0117] refer to Figures 7 to 12 The syringe loading mechanism 100 includes a loading seat 110, and a loading channel groove for loading injection syringes is provided on the upper surface of the loading seat 110. The loading channel groove runs through the loading seat 110 along the X direction, and a mounting boss 117 is provided on the lower surface of the rear end of the loading seat 110; in the assembled state, the mounting boss 117 is positioned in the step groove 221, and the loading channel groove is connected to the push rod slide groove 220 in the X direction.

[0118] In this embodiment, the above-mentioned mounting frame 22 and loading seat 110 are provided, and the two are positioned and connected in a manner that the mounting boss 117 of the loading seat 110 is positioned in the step groove 221 of the mounting frame 22. After the connection, the loading channel groove is connected to the push rod slide groove 220 in the X direction, and the main loading structure for loading the injection syringe is the loading channel groove of the loading seat 110. The loading structure is simple and has fewer fine gap structures, thereby making cleaning easier. When cleaning, the loading seat 110 can even be detached from the shell of the injection head A1 and the support frame assembly 2 and removed. After removal, the loading seat 110 can be cleaned independently. Cleaning is not limited by the shell space of the injection head A1, and cleaning is more thorough.

[0119] Continue to refer Fig.64 In order to increase the stability in the assembled state, in this embodiment, it is more preferred that a step groove bottom plate 2210 is provided at the bottom of the step groove 221, and the step groove bottom plate 2210 is fixed or integrally connected to the mounting frame 22, and a Z-direction through screw hole is provided on the step groove bottom plate 2210, and the screw hole is used to screw in a screw in the assembled state to fix the mounting boss 117 in the step groove 221.

[0120] Continue to refer Fig.64 In order to prevent the liquid from entering the shell when using the high-pressure syringe, in this embodiment, preferably, a Y-direction partition 22101 fixedly connected to the mounting frame 22 is provided inside the push rod slide 220, and a push rod through hole is provided on the Y-direction partition 22101. Fig.16 , a collar 7 surrounding the push rod through hole is also installed on the front end surface of the Y-direction partition 22101, and the push rod 21 passes through the push rod through hole and the collar 7; the housing includes an upper housing 3 and a lower housing 4 that are butt-jointed in the Z direction, and the mounting frame 22 is fixed between the upper housing 3 and the lower housing 4, and the area where the push rod slide 220 is located at the front end of the collar 7 and the upper surface of the loading seat 110 are exposed outside the housing cavity, and the areas where the push rod slide 220 and the push rod 21 are located outside the collar 7 and the power unit 23 are all arranged in the housing cavity. With this structure, the loading seat 110 is isolated from the housing cavity, and the collar 7 is used for sealing to prevent contrast agent and saline from invading the injection head A1, and protect the internal parts of the housing, especially the control components.

[0121] Further preferably, it is also possible to Figure 6 As shown, a mounting opening is provided at a portion of the bottom of the lower shell body 4 corresponding to the area where the push rod slide groove 220 is located at the front end of the clamping ring 7, and a slide groove bottom support plate 8 is detachably installed in the mounting opening. When cleaning, the slide groove bottom support plate 8 can be removed to clean the push rod slide groove 220 of the mounting frame 22. After cleaning, the slide groove bottom support plate 8 can be installed, which makes cleaning more convenient.

[0122] In addition, in this embodiment, in order to maintain the stability and effectiveness of the push rod 21 when pushing and pulling the piston rod in the injection syringe, it is preferred that Fig.66 As shown, a push rod clamp 211 is provided at the front end of the push rod 21, and the push rod clamp 211 is used to clamp the rear end of the piston rod in the injection syringe.

[0123] Continue to refer to Figures 7 to 12 , combined with Figures 13 to 33 In order to improve the loading stability of the injection syringe on the loading seat 110, in this embodiment, it is more preferred that the loading channel groove in the loading seat 110 includes a main channel groove, and a cylinder elastic pressing piece 113 is respectively provided on the two side walls of the main channel groove that are symmetrical in the Y direction. Further preferably, the cylinder elastic pressing piece 113 is in the shape of a long strip extending along the Z direction and spaced from the side wall of the main channel groove; the upper end of the cylinder elastic pressing piece 113 is fixedly connected to the upper end of the side wall of the main channel groove, and the end face of the lower end of the cylinder elastic pressing piece 113 is a circular arc surface convex toward the inner direction of the main channel groove. Further preferably, in the Z direction, the bottom surface of the main channel groove is a circular arc surface; with the outer diameter of the cylinder of the injection syringe as d1, the bottom diameter of the main channel groove as d2, and the minimum Y-direction spacing of the lower ends of the cylinder elastic elastic pressing pieces on the two symmetrical side walls of the main channel groove as d3, the injection syringe satisfies d1=d2>d3 when it is not loaded.

[0124] Further preferably, in the high-pressure injector, an end step E3 with an increased outer diameter is provided at the rear end of the barrel of the injection syringe; correspondingly, in the loading seat 110, the loading channel groove includes a main channel groove and a loading seat end groove 115 that are interconnected in the X direction, and the loading seat end groove 115 is located at the rear end of the main channel groove, and the inner diameter of the loading seat end groove 115 is greater than the inner diameter of the main channel groove, and the Z-direction depth of the loading seat end groove 115 is greater than the Z-direction depth of the main channel groove; in the loading syringe loading state, the barrel of the injection syringe is clamped in the main channel groove, and the end step E3 of the injection syringe is clamped in the loading seat end groove 115. In order to further improve the assembly stability, further preferably, in the X direction, an end spring member 114 is provided on the groove front end surface 1152 or the groove rear end surface 1151 of the loading seat end groove 115. Preferably, the end spring member 114 is in the shape of a strip extending in the Z direction and spaced from the inner wall of the groove, the lower end of the end spring member 114 is fixedly connected to the lower end of the groove front end surface 1152 or the groove rear end surface 1151, and the end surface of the upper end of the end spring member 114 is an arc surface protruding toward the inside of the end groove 115 of the loading seat. Further preferably, the X-direction spacing between the groove front end surface 1152 and the groove rear end surface 1151 is L1; and one of the groove front end surface 1152 and the groove rear end surface 1151 that is fixedly connected to the lower end of the end spring member 114 is the end spring member 114 setting surface, and the other end surface is the symmetric surface of the end spring member 114 setting surface, and the X-direction spacing between the symmetric surface and the upper end arc surface of the end spring member 114 is L2; ​​and the front and rear end surface spacing of the end step E3 in the injection syringe along the axial direction of the barrel is L, then: L1>L>L2 is satisfied.

[0125] In addition, reference Figure 7 In this embodiment, it is more preferred that an optical coupler 130 is provided inside the loading channel groove of the loading seat 110, and the light outlet of the detection light 131 of the optical coupler 130 is located in the Z-direction plane; a controller is provided inside the shell; the controller includes an optical coupler detection unit and an information processing unit; the optical coupler detection unit is connected to the optical coupler 130, and the optical coupler detection unit and the power unit 23 are both connected to the information processing unit; when the loading channel groove is unloaded, the optical coupler 130 sends an unloaded signal to the optical coupler detection unit, the optical coupler detection unit receives and transmits the unloaded signal to the information processing unit, and the information processing unit receives the unloaded signal and controls the push rod 21 to retreat to an unloaded state along the X direction.

[0126] More preferably and conveniently, the controller also includes a storage unit and an alarm unit; the storage unit pre-stores the drug spectrum detection characteristic information; the optical coupling detection unit can also receive and analyze the spectrum information detected by the optical coupling 130, and transmit the spectrum information to the information processing unit; the information processing unit can retrieve the drug spectrum detection characteristic information pre-stored in the storage unit, and compare the received spectrum information with the retrieved characteristic information, and output an alarm signal to the alarm unit and the power unit 23 when the spectrum information and the characteristic information do not match; the alarm unit sends an alarm signal when receiving the alarm signal, and the power unit 23 is locked in a non-injection state when receiving the alarm signal.

[0127] The optical coupler 130 is corrosion-resistant and has strong penetrating power. It can penetrate transparent objects such as contrast agents, saline solutions, and syringe barrels. Therefore, the optical coupler 130 will not be affected by the leakage of contrast agents and saline solutions, and the maintenance cycle can be shortened. At the same time, the optical coupler 130 can analyze whether the syringe is loaded with saline solution, contrast agents, or no liquid medicine by detecting the spectral information when the light 131 penetrates. If the liquid detected after the syringe absorbs the medicine is different from the set value, an alarm will be issued and the injection will not be supported. The application of the optical coupler 130 improves the safety of pharmaceutical injections and can prevent medical personnel from mistakenly sucking the wrong liquid medicine into the syringe. Therefore, the role of the optical coupler 130 can be summarized as follows:

[0128] (1) It can determine whether a syringe is loaded;

[0129] (2) The selected optical coupler is corrosion-resistant and has strong penetrating power. It can penetrate transparent objects such as contrast agents, saline solutions, and syringe barrels. Therefore, it is not affected by leakage of contrast agents and saline solutions, and the maintenance cycle can be shortened.

[0130] (3) The optical coupler 130 can analyze whether the syringe is loaded with saline, contrast agent or other drugs through the spectral information of the detection light 131 when it penetrates, thereby preventing medical staff from making mistakes and sucking the wrong drug into the syringe.

[0131] In order to improve the convenience of using the high-pressure injector, the following structural improvements are also made in this embodiment:

[0132] Furthermore, the syringe loading mechanism 100 further includes a prefilled assembly; the prefilled assembly includes a prefilled syringe adapter; the prefilled syringe adapter includes an adapter seat, and a prefilled syringe loading groove for loading the prefilled syringe is provided on the upper surface of the adapter seat, and the prefilled syringe loading groove passes through the adapter seat along the X direction. When the adapter is assembled, the adapter seat is positioned in the loading channel groove of the syringe loading mechanism 100. By using the prefilled syringe adapter as a transition piece, a prefilled syringe with a diameter significantly smaller than that of an injection syringe can also be applied to the loading seat 110, which is more convenient to use.

[0133] Among them, in the above-mentioned optional embodiments in which the loading seat 110 is provided with the cylinder elastic member 113, it is more preferred that Figures 37 to 42 As shown, especially with reference to Fig.41 , combined with Fig.43 An outer wall column H4 is provided on the outer peripheral wall of the adapter seat. In the assembled state, the outer wall column H4 presses against the cylinder elastic pressing part 113.

[0134] In various optional embodiments in which the loading seat 110 is provided with a loading seat end groove 115, it is more preferred that Figures 37 to 42 As shown, especially with reference to Fig.38 , combined with Fig.43 The lower surface of the rear end of the adapter seat is provided with an end boss H2. In the assembled state, the end boss H2 is positioned in the end groove 115 of the loading seat. Further preferably, as Fig.12 as well as Figures 43 to 57 As shown, in the loading seat 110, the upper part of the two side walls of the loading seat end groove 115 symmetrically upwardly is provided with a groove undercut step 1155 protruding toward the middle of the loading seat end groove 115; along the Z direction, on the two side walls of the loading seat end groove 115 symmetrically upwardly: the side surface above the groove undercut step 1155 forms a groove oblique guide surface 1153 that gradually increases the inner diameter of the loading seat end groove 115 from the groove undercut step 1155 upwardly, and the side surface below the groove undercut step 1155 forms a groove guide side surface 1154. In the adapter seat, the side surface of the end boss H2 includes an elastic buckle H22, and the elastic buckle H22 is provided with a step portion on the radial outer surface of the adapter seat. In the assembled state, the step portion of the elastic buckle H22 is buckled with the Z-direction bottom of the groove undercut step 1155 to ensure assembly stability.

[0135] More preferably, in the adapter, the pre-filled syringe loading slot includes a main loading slot, and spring buckles H13 are respectively provided on the two symmetrical side walls of the main loading slot Y upward for clamping the barrel of the pre-filled syringe.

[0136] Preferably, the rear end of the barrel of the prefilled syringe is provided with an end clamping ring I3 with an increased outer diameter; in the adapter seat, the prefilled syringe loading groove includes a main loading groove and an adapter end groove H3 that are interconnected in the X direction, and the adapter end groove H3 is located at the rear end of the main loading groove; the Z-direction depth of the adapter end groove H3 is greater than the Z-direction depth of the main loading groove; in the prefilled syringe loading state, the barrel of the prefilled syringe is clamped in the main loading groove, and the end clamping ring I3 of the prefilled syringe is clamped in the adapter end groove H3. And further preferably, an end snap H31 is provided on the front side surface or the rear side surface H32 of the adapter end groove H3 to clamp the end clamping ring I3 of the prefilled syringe.

[0137] In addition, in each optional embodiment in which the loading seat 110 is provided with an optical coupler 130, further, an optical coupler clearance groove H15 that does not block the detection light 131 of the optical coupler 130 is provided on the peripheral wall of the adapter seat, and the Z-direction depth of the prefilled syringe loading groove satisfies: when the prefilled syringe is loaded in the prefilled syringe loading groove, the detection light 131 of the optical coupler 130 is blocked by the prefilled syringe.

[0138] In addition, in the preferred implementation of this embodiment, Fig.38 and Fig.41 As shown, top plates H5 are provided on both sides of the adapter seat in the X direction, a first pressure column H52 is provided on the bottom surface of one top plate H5, and a second pressure column H53 is provided on the bottom surface of the other top plate H5. Figures 7 to 9 as well as Fig.43 As shown, a sensor group 120 is provided at the positions on both sides of the loading channel groove on the upper surface of the loading seat 110; the positions on both sides of the loading channel groove on the upper surface of the loading seat 110 are respectively the upper surface of the first side in the X direction and the upper surface of the second side in the X direction, and the sensor group 120 includes a first sensor 121 and a second sensor 122 provided on the upper surface of the first side and spaced in the X direction, and a third sensor 123 and a fourth sensor 124 provided on the upper surface of the second side and spaced in the X direction. In the adapter loading state, the first pressure column H52 contacts the first sensor 121 or the second sensor 122 to trigger the corresponding sensor, and the second pressure column H53 contacts the third sensor 123 or the fourth sensor 124 to trigger the corresponding sensor.

[0139] A controller is provided inside the shell of the injection head A1; the controller includes a storage unit and an information processing unit which are interconnected; the storage unit pre-stores a plurality of sensor triggered combinations to represent various adapter models respectively, and presets a plurality of push rod 21 retreat distances in correspondence with the plurality of sensor triggered combinations; each sensor and power unit 23 in the sensor group 120 are connected to the information processing unit, and the information processing unit can receive a signal sent after the sensor group 120 is triggered, and retrieve information pre-stored in the storage unit, and compare the received signal with the pre-stored sensor triggered combination, match the corresponding push rod 21 retreat distance, and transmit it to the power unit 23, and the power unit 23 correspondingly retreats the push rod 21 after receiving the push rod 21 retreat distance information instruction.

[0140] like Figure 41 to Figure 43As shown, taking prefilled contrast agents as an example, commonly used prefilled contrast agents have specifications of 7.5mL, 10mL, 15mL, 20mL, etc., and this embodiment is numbered with letters IA, IB, IC, ID, etc. Since the diameter of the syringe of prefilled contrast agent I is smaller than that of contrast agent syringe E, when it is loaded on injection head A1, a prefilled contrast agent syringe adapter H is required; the adapters corresponding to prefilled contrast agents of specifications such as IA, IB, IC, ID are numbered with letters HA, HB, HC, HD. The same principle applies, the diameter of prefilled saline K is smaller than that of saline syringe B, and when it is loaded on injection head A1, a prefilled saline syringe adapter J is required. Figure 4 I and K shown are in the initial factory state and are filled with contrast agent of corresponding specification volume.

[0141] For different types of pre-filled contrast medium syringe adapters H, the first pressure column H52 and the second pressure column H53 of the top plate H5 can be designed to have different positions. The high-pressure injector control system is set to judge whether the pre-filled contrast medium syringe adapter H is installed and the type of the installed pre-filled contrast medium syringe adapter H through the triggering condition of the sensor group 120. Then, according to the identified type of the pre-filled contrast medium syringe adapter H, the push rod 21 retreats a set distance L to be compatible with the installation of the corresponding pre-filled contrast medium syringe I. The triggering condition statistics of the triggering sensor group 120 corresponding to each adapter are shown in the following table:

[0142]

[0143] The first sensor 121, the second sensor 122, the third sensor 123, and the fourth sensor 124 are arranged on both sides of the contrast agent main channel groove 111 of the loading seat 110. The high-pressure injector control system is configured so that each pre-filled contrast agent syringe adapter H needs to trigger the sensors on both sides at the same time before it is considered to be detected as being loaded on the loading seat 110. The control system setting can avoid: (1) improper operation when using the pre-filled contrast agent syringe adapter H, resulting in only one side of the pre-filled contrast agent syringe adapter H being loaded on the end groove 115 of the loading seat, or the pre-filled contrast agent syringe adapter H being unable to be loaded due to plastic deformation; (2) There are many foreign objects attached to the pre-filled contrast medium syringe adapter H or the loading seat 110 (this will force medical personnel to clean the high-pressure syringe), thereby avoiding the use of the high-pressure syringe in an unclean environment; the control system can ensure that the pre-filled contrast medium syringe adapter H can be used only when both sides are locked, which can avoid the risk of the pre-filled contrast medium syringe I being separated from the high-pressure syringe when the pre-filled contrast medium syringe adapter H is not locked and used, and can also avoid unclean use when many foreign objects are attached to the loading seat 110 and the pre-filled contrast medium syringe adapter H. Through this control system, the safety of the high-pressure syringe can be improved, and a clean use environment can be provided to ensure the sanitation of infusion.

[0144] In addition, in the present embodiment, it is more preferred that a force sensor for detecting the injection pressure when injecting the medicine is fixed at the front end of the push rod 21 or other appropriate position. Since the pressure feedback of the high-pressure injector involves the safety of infusion, such as inaccurate injection pressure feedback or delayed feedback, it will bring potential safety hazards. Therefore, the detection accuracy, response time, long-term stability, etc. of the pressure sensor in the mounting frame 22 are crucial, and the corresponding pressure sensor should be selected based on this principle. The present embodiment does not impose any specific restrictions on its model.

[0145] In this embodiment, the loading channel slots in the loading seat 110 may include one or two or more, and the corresponding pre-filling components include one or two or more. The process of injecting contrast agent and saline in this embodiment is described below in conjunction with the accompanying drawings, and the structure of the injection head A1 provided in this embodiment is also described in more detail:

[0146] In this embodiment, refer to Figures 7 to 12 The loading seat 110 includes a contrast agent main channel groove 111, a physiological saline main channel groove 112, a cylinder spring-pressing piece 113, an end spring-pressing piece 114, a loading seat end groove 115, a groove bottom arc profile 116 and a mounting boss 117.

[0147] The loading seat 110 is preferably made of plastic. The loading seat end groove 115 includes a groove rear end face 1151, a groove front end face 1152, a groove oblique guide face 1153, a groove guide side face 1154 and a groove undercut step 1155. The mounting boss 117 is used to position and lock the loading seat 110 to the housing of the injection head A1 during installation.

[0148] Reference Figures 4 to 6 , combined with Figures 1 to 3 The overall structure of the injection head A1 includes a syringe loading mechanism 100, a support frame assembly 2, an upper shell 3, a lower shell 4, a cross arm column 5, a labyrinth ring 6, a clamping ring 7, a bottom support plate of the slide groove 8, and an electrical plug 9. The support frame assembly 2 includes a push rod 21, and a push rod clamp 211 is provided at the front end of the push rod 21.

[0149] like Figures 13 to 15 As shown, the contrast agent syringe E includes a contrast agent syringe body E1, a contrast agent syringe scale E2, an end step E3, a contrast agent syringe matching piston rod end E4, and a contrast agent syringe matching piston rod E5. The contrast agent syringe scale E2 is arranged on the outer peripheral surface of the contrast agent syringe body E1. Fig.13 The E contrast medium syringe is in the factory initial empty syringe state, and the contrast medium syringe matching piston rod end E4 is closest to the end step E3. Preferably, the contrast medium syringe body E1 is made of a transparent cylindrical plastic part. The end step E3 includes a step pressure surface E31, a step guide side surface E32, a step tension surface E33, a step upper profile E34, a step concave end surface E35, a concave step E36, and a step lower profile E37. The contrast medium syringe matching piston rod E5 is preferably made of an opaque plastic part to block light.

[0150] The physiological saline syringe B and the contrast medium syringe E are only different in size, similar in structure and in the same factory condition.

[0151] Fig.16 It is a schematic diagram of loading the factory empty syringes of the physiological saline syringe B and the contrast agent syringe E. At this time, the physiological saline syringe B is in a loading completed state; the end step E3 of the contrast agent syringe E is installed into the end groove 115 of the loading seat. At this time, the piston rod end E4 of the contrast agent syringe will be combined with the push rod clamp 211.

[0152] Preferably, the syringe loading mechanism 100 further includes an optical coupler 130, which is installed in both the contrast agent main channel groove 111 and the physiological saline main channel groove 112 on the loading seat 110, and is used to detect whether the two places are loaded with syringes. After the high-pressure syringe A is powered on, the optical coupler 130 in the syringe loading mechanism 100 is powered on and works. If there is no opaque obstruction in the working area of ​​the optical coupler 130, the optical coupler 130 will not be triggered, and the push rod 21 of the support frame assembly 2 will automatically reset to the position as shown in FIG. Figure 5In the state shown, the push rod 21 is closest to the syringe loading mechanism 100, and can meet the requirements of installing an empty physiological saline syringe B or a contrast agent syringe E.

[0153] The process of loading the contrast medium syringe E into the loading seat 110 is as follows:

[0154] first step:

[0155] like Fig.17 As shown, when installing the syringe, the end E4 of the piston rod of the contrast agent syringe is aligned with the push rod 21, and the four side surfaces of the step E3 at the end of the syringe are aligned with the four side surfaces of the groove 115 at the end of the loading seat and installed downward. Specifically: hold the end of the syringe with the syringe scale facing upward, the end E4 of the piston rod of the contrast agent syringe is aligned with the push rod clamp 211, the step guide side surfaces E32 on both sides of the step E3 at the end of the syringe are aligned with the groove oblique guide surface 1153 of the groove 115 at the end of the loading seat, the step pressure surface E31 of the step E3 at the end of the syringe is aligned with the groove front end surface 1152 of the groove 115 at the end of the loading seat, and the step tension surface E33 of the step E3 at the end of the syringe is aligned with the groove rear end surface 1151 of the groove 115 at the end of the loading seat;

[0156] At this time, the matching relationship between the contrast agent syringe E and the groove 115 at the end of the loading seat is as follows: Figures 18 to 20 As shown, the diameter of the contrast agent syringe E1 is d1, the arc segment diameter of the contrast agent main channel groove 111 is d2, and the minimum distance between the arc ends of the cylinder elastic pressing parts 113 on both sides is d3, satisfying: d1=d2>d3;

[0157] Step 2:

[0158] Press the step E3 at the end of the syringe downward. During this process, the lower contour E37 of the step E3 at the end of the syringe will first contact the end spring member 114.

[0159] At this time, the matching relationship between the contrast agent syringe E and the groove 115 at the end of the loading seat is as follows: Figure 21 to Figure 23 As shown; the distance between the rear end face 1151 of the groove 115 at the end of the loading seat and the front end face 1152 of the groove is L1, the distance between the front end face 1152 of the groove and the arc segment of the end elastic member 114 is L2, the distance between the step pressure surface E31 and the step tension surface E33 of the step E3 at the end of the syringe is L3, and the distance between the step pressure surface E31 and the step concave end face E35 is L4, then, the relationship is satisfied: L1>L3>L4>L2; at this time, the step pressure surface E31 of the step E3 at the end of the syringe fits with the front end face 1152 of the groove 115 at the end of the loading seat, and the groove oblique guide surface 1153 of the groove 115 at the end of the loading seat will guide the step guide side surface E32 of the step E3 at the end of the syringe to move downward, and the end E4 of the piston rod of the contrast agent syringe will gradually combine with the push rod clamp 211;

[0160] Step 3:

[0161] Since L3>L2, and the end spring member 114 is elastic, the arc end of the head of the end spring member 114 will be stretched open by the syringe end step E3. The process of the end spring member 114 being stretched open by the syringe end step E3 is as follows: Figures 24 to 30 As shown:

[0162] ① Such as Fig.24 As shown, due to the elastic force generated by the end spring member 114, the step E3 at the end of the syringe is pushed forward, so that the step pressure surface E31 is pressed on the front end surface 1152 of the groove 115 at the end of the loading seat, and the step tension surface E33 will continue to rub against the arc end of the end spring member 114. Designing the end of the end spring member 114 into an arc shape can reduce the friction area and increase its service life.

[0163] ② If Fig.25 As shown, the tension surface E33 of the step E3 at the end of the syringe continues to rub against the arc end of the end spring-pressing member 114. At this time, the end spring-pressing member 114 has been bent, and the end spring-pressing member 114 will continue to generate elastic force to push the step E3 at the end of the syringe forward, so that the pressure surface E31 of the step E3 at the end of the syringe fits with the front end surface 1152 of the groove 115 at the end of the loading seat;

[0164] ③ Finally, the contrast agent syringe E is assembled on the loading seat 110 as shown in FIG. Fig.28 The lower profile E37 of the step E3 at the end of the syringe and the arc profile 116 at the bottom of the groove are the same arc profile, but the spacing of the arc profile 116 at the bottom of the groove relative to the lower profile E37 of the step is as shown. Fig.26 , Fig.29 and Fig.30 L5 is shown;

[0165] ④ Fig.28 The end spring-pressing members 114 on both sides of the contrast agent syringe E are still in a spring-pressing state, and the pressure generated by their elastic deformation acts on the concave end surface E35 and the concave step E36 of the syringe end step E3, which are Fe1 and Fe2; because d1=d2, under the action of Fe1 and Fe2, the syringe end step E3 fits with the step pressure surface E31, and the contrast agent syringe body E1 will be pressed against the contrast agent main channel groove 111; the end spring-pressing members 114 are symmetrically arranged on both sides of the contrast agent syringe E, so the Fe2 on both sides are the same in size and direction. Under the action of Fe2 on both sides, the position of the contrast agent syringe E in the loading seat 110 along the axial rotation direction of the contrast agent syringe E can also be uniquely confirmed, that is, the lower contour E37 of the step and the arc contour 116 at the bottom of the groove are as shown in Fig.29 They are shown in a parallel state and do not fit into each other;

[0166] ⑤ The elastic force of the end elastic member 114 can position the contrast agent syringe E in the loading seat 110, and the syringe end step E3 is completely clamped;

[0167] Step 4:

[0168] During the process of the syringe end step E3 pushing open the end elastic member 114, the contrast agent syringe body E1 will also push open the cylinder elastic member 113; among them, when the syringe end step E3 reaches Fig.26 and Fig.29 the shown state, the corresponding contrast agent syringe body E1 reaches Fig.33 the shown state; since d3 < d1, therefore, during the loading process of the contrast agent syringe E, first, as Fig.31 shown, the contrast agent syringe body E1 first tangentially contacts the arc end face of the cylinder elastic member 113, and then as Fig.32 shown, the cylinder elastic member 113 is squeezed and pushed open, and finally the loading state is as Fig.33 shown. At this time, the cylinder elastic members 113 on both sides have an elastic force F acting on the contrast agent syringe body E1, so that the contrast agent syringe body E1 is pressed against the contrast agent main channel groove 111, thereby fixing the contrast agent syringe E in the contrast agent main channel groove 111;

[0169] Since the contrast agent syringe E is relatively long, therefore, in addition to arranging the end elastic members 114 symmetrically on both sides at the syringe end step E3, the cylinder elastic members 113 symmetrically arranged on both sides are also arranged at the end position of the loading seat 110. The elastic forces Fe1, Fe2, and F generated by all the elastic members can completely position and clamp the contrast agent syringe E in the loading seat 110.

[0170] The injection head A1 can also be used for loading pre-filled contrast agent and pre-filled normal saline. As Figure 4 shown, Figure 4 the structure includes a pre-filled contrast agent syringe adapter H, a pre-filled contrast agent syringe I, a pre-filled normal saline syringe adapter J, and a pre-filled normal saline syringe K.

[0171] The structure of the pre-filled contrast agent syringe I is as Figure 34 to Figure 36 shown. Its structure is basically similar to that of the contrast agent syringe E; it includes a pre-filled contrast agent syringe body I1, a pre-filled contrast agent syringe scale I2, an end retaining ring I3, a pre-filled contrast agent syringe matching piston rod I5, a pre-filled contrast agent syringe matching piston rod end I4, and a syringe end arc contour I6; the pre-filled contrast agent syringe body I1 can be but is not limited to being made of plastic parts such as PET, PVC, PC, etc. or made of glass. The end retaining ring I3 has the same function as the E3 end step of the contrast agent syringe E, and it includes a retaining ring pressure receiving surface I31, a retaining ring side guide surface I32, a retaining ring rear side surface I33, a retaining ring top surface I34, and a retaining ring bottom arc profile I35.

[0172] Figures 37 to 42 Schematic diagram of the structure of the pre-filled contrast medium syringe adapter H: Fig.37 and Fig.38 The structure includes an inner wall H1 of a pre-filled contrast agent syringe adapter, an end boss H2, an adapter end groove H3, an outer wall column H4 and a top plate H5. Similar to the working principle of the contrast agent main channel groove 111 and the barrel elastic member 113 on the loading seat 110, the inner wall H1 of the prefilled contrast agent syringe adapter is used to cooperate with the prefilled contrast agent syringe body I1 and the arc profile I6 of the syringe end in the prefilled contrast agent syringe I; the end boss H2 is used to lock the prefilled contrast agent syringe adapter H on the syringe loading mechanism 100; similar to the working principle of the loading seat end groove 115 and the arc profile 116 at the bottom of the groove of the loading seat 110, the adapter end groove H3 is used to cooperate with the end clamp ring I3; similar to the working principle of the contrast agent syringe body E1, the outer wall column H4 is used to position and cooperate with the contrast agent main channel groove 111; the top plate H5 is used to trigger the sensor group 120 provided on the upper surface of the loading seat 110, so as to determine whether the prefilled contrast agent syringe adapter H is installed, and the specifications of the prefilled contrast agent syringe adapter H are determined according to the combination of the triggered sensors.

[0173] like Figures 39 to 42 As shown, the inner wall H1 of the pre-filled contrast agent syringe adapter includes the inner wall H11 of the barrel, the end arc wall H12, the spring buckle H13, the extrusion clearance groove H14 and the optical coupling clearance groove H15. The end boss H2 includes a handle H21, an elastic buckle H22, a boss oblique guide surface H23, a boss side guide surface H24, a boss concave end surface H25, a step surface H26, a convex end surface H27, a boss bottom arc profile H28 and an end boss pushing surface H29; the structural features of the boss side guide surface H24 and the boss bottom arc profile H28 are the same as the step guide side E32 and the step bottom profile E37 of the end step E3 in the contrast agent syringe E; the boss The structural features of the concave end surface H25, the step surface H26, and the convex end surface H27 are the same as those of the concave end surface E35, the concave step E36, and the step tensile surface E33 of the end step E3 in the contrast agent syringe E; and the relationship between the concave end surface H25, the step surface H26, and the convex end surface H27 of the boss and the arc profile H28 at the bottom of the boss is the same as the relationship between the concave end surface E35, the concave step E36, and the step tensile surface E33 of the end step E3 in the contrast agent syringe E. The adapter end groove H3 includes an end snap H31, a groove rear side surface H32, a groove front pressure surface H33, a groove bottom side arc profile H34, a groove side guide surface H35, and an end clearance groove H36. The outer wall column H4 is an arc-shaped reinforcement rib, which is arranged symmetrically on the pre-filled contrast agent syringe adapter H, and its diameter is equal to that of the contrast agent syringe body E1, both of which are d1. Fig.41 As shown, the top plate H5 includes a top plane H51, a first pressure column H52 and a second pressure column H53.

[0174] When using a pre-filled syringe, you need to first load the pre-filled contrast medium syringe adapter H or the pre-filled saline syringe adapter J onto the loading seat 110; Fig.43 As shown, after the high-pressure injector is powered on, the system is reset, and the push rod clamp 211 of the injection head A1 is in the state as shown in FIG. Fig.43 Initial position shown.

[0175] like Fig.43 As shown, the contrast agent main channel slot 111 and the physiological saline main channel slot 112 of the loading seat 110 are both symmetrically and evenly distributed with sensor groups 120. Taking the contrast agent main channel slot 111 as an example, the first sensor 121, the second sensor 122, the third sensor 123, and the fourth sensor 124 are distributed. Taking the loading of a 10mL pre-filled contrast agent syringe IB as an example, the 10mL pre-filled contrast agent syringe adapter HB needs to be loaded first:

[0176] a) If Fig.44 and Fig.45 As shown, Fig.44 The 10mL pre-filled contrast medium syringe adapter HB is then held with the handle H21 of the end boss H2, so that the handle H21 produces Fig.45 The elastic deformation shown; from top to bottom: the boss side guide surface H24 of the boss H2 at the end of the 10mL pre-filled contrast agent syringe adapter HB is aligned with the groove oblique guide surface 1153 of the groove 115 at the end of the loading seat, and the end boss pushing surface H29 thereof is aligned with the groove front end surface 1152 of the groove 115 at the end of the loading seat, and the convex end surface H27 thereof is aligned with the groove rear end surface 1151 of the groove 115 at the end of the loading seat, and the 10mL pre-filled contrast agent syringe adapter HB is pushed downward along the groove 115 at the end of the loading seat, and the four side surfaces of the end boss H2 slide under the guidance of the four side surfaces corresponding to the groove 115 at the end of the loading seat to load the 10mL pre-filled contrast agent syringe adapter HB, and the loading process is the same as the loading principle of the contrast agent syringe E;

[0177] b) When the outer wall column H4 moves downward to fit with the contrast agent main channel groove 111 of the loading seat 110, release the handle H21 of the end boss H2. Fig.46 As shown, the handle H21 of the end boss H2 will return to its original state. In the process of returning to its original state, as shown in FIG. Fig.46 and Fig.47 As shown, the elastic buckle H22 is fitted with the groove undercut step 1155 of the end groove 115 of the loading seat, and the boss oblique guide surface H23 is fitted with the groove guide side surface 1154 of the end groove 115 of the loading seat. Since the groove undercut step 1155 and the groove guide side surface 1154 of the end groove 115 of the loading seat block the handle H21 of the end boss H2 from recovering its deformation upward and outward, Fig.46In this state, the handle H21 of the end boss H2 cannot be restored to Fig.44 The natural state shown will remain Fig.46 and Fig.47 The combined elastic deformation state in the vertically downward and outward directions enables the outer wall column H4 of the 10mL pre-filled contrast agent syringe adapter HB to be tightly pressed on the contrast agent main channel groove 111 of the loading seat 110;

[0178] c) After the 10mL pre-filled contrast agent syringe adapter HB is loaded onto the loading seat 110, the engagement between the end boss H2 and the end spring member 114 of the loading seat 110 is similar to Figure 24 to Figure 26 Same, such as Figures 48 to 51 As shown; finally Fig.51 As shown, the end spring member 114 of the loading seat 110 springs and acts on the end boss H2 of the 10mL pre-filled contrast agent syringe adapter HB, and the end spring member 114 of the loading seat 110 generates elastic deformation and presses on the boss concave end surface H25 and the step surface H26 of the end boss H2, generating spring forces Fh1 and Fh2, and Fh1 and Fh2 on both sides press the end boss H2 against the groove front end surface 1152 of the end groove 115 of the loading seat 110 and the contrast agent main channel groove 111;

[0179] After the 10mL pre-filled contrast medium syringe adapter HB is loaded on the loading seat 110, the final locking state of the groove 115 at the end of the loading seat is as follows: Fig.47 and Fig.51 As shown: the elastic pressure generated by the elastic deformation of the two symmetrical structures of the 10mL pre-filled contrast agent syringe adapter HB and the elastic pressure generated by the elastic deformation of the end spring members 114 distributed on both sides enable the 10mL pre-filled contrast agent syringe adapter HB to be pressed against the front end surface 1152 of the groove of the contrast agent main channel groove 111 and the end groove 115 of the loading seat, so that the 10mL pre-filled contrast agent syringe adapter HB is accurately positioned in the loading seat 110, and the locking is stable and reliable without shaking.

[0180] After the 10mL pre-filled contrast medium syringe adapter HB is installed on the contrast medium main channel groove 111, Figure 52 to Figure 54 As shown; the first pressure column H52 of the 10mL pre-filled contrast agent syringe adapter HB triggers the fourth sensor 124, and the second pressure column H53 triggers the second sensor 122; and the detection light 131 of the optical coupler 130 passes through the optical coupler yielding groove H15 of the 10mL pre-filled contrast agent syringe adapter HB, so the optical coupler 130 is not triggered.

[0181] like Fig.55 As shown, after the 10 mL pre-filled contrast medium syringe adapter HB is loaded, the push rod clamp 211 retreats, and the 10 mL pre-filled contrast medium syringe IB can be loaded at this time.

[0182] When the 10 mL pre-filled contrast medium syringe adapter HB needs to be removed from the loading seat 110, the handle H21 of the end boss H2 can be pinched by hand to make the handle H21 be in the shape of Fig.56 and Fig.57 In the state shown, at this time, the elastic buckle H22 of the end boss does not contact the groove undercut step 1155 of the end groove 115 of the loading seat, and the boss inclined guide surface H23 of the end boss H2 does not contact the groove guide side surface 1154 of the end groove 115 of the loading seat. The handle H21 is pulled upward to overcome the elastic force of the end elastic parts 114 on both sides to remove the 10mL pre-filled contrast agent syringe adapter HB.

[0183] The loading principle of the pre-filled contrast medium syringe I is the same as the loading process and principle of the contrast medium syringe E. Figures 58 to 60 As shown, the two collar side guide surfaces I32 of the end collar I3 in the prefilled contrast agent syringe I are aligned with the groove side guide surfaces H35 of the adapter end groove H3 in the 10mL prefilled contrast agent syringe adapter HB, the collar pressure surface I31 of the end collar I3 is aligned with the groove front pressure surface H33 of the adapter end groove H3, the collar rear side surface I33 of the end collar I3 is aligned with the groove rear side surface H32 of the adapter end groove H3, and the 10mL prefilled contrast agent syringe IB is loaded into the inner wall H11 of the barrel.

[0184] Finally, if Fig.61 and Fig.62 As shown, the pre-filled contrast agent syringe body I1 of the 10mL pre-filled contrast agent syringe IB is elastically deformed and pressed by the snap hooks H13 at four locations, and the end collar I3 is elastically deformed and pressed by the end snap hooks H31 of the end grooves H3 of the adapter on both sides. At this time, the situation at the optical coupler 130 is as follows Fig.63 As shown, the detection light 131 at this time passes through the optical coupler yielding groove H15 on the inner wall H1 of the pre-filled contrast agent syringe adapter and is blocked by the pre-filled contrast agent syringe body I1, so that the control system determines that the 10mL pre-filled contrast agent syringe IB is completely loaded.

[0185] The operation process and principle of loading the saline syringe B, loading the pre-filled saline syringe adapter J, and loading the pre-filled saline syringe K in the saline main channel groove 112 of the loading seat 110 are the same as those of loading the contrast agent syringe E, loading the pre-filled contrast agent syringe adapter H, and loading the pre-filled contrast agent syringe I in the contrast agent main channel groove 111 of the loading seat 110.

[0186] In addition, if Figure 8 and Fig. 9As shown, in the syringe loading mechanism 100, the mounting boss 117 of the loading seat 110 is used to position and lock the loading seat 110 to the support frame assembly 2 during installation, and the mounting boss 117 includes a boss pulling and pressing end 1171, a boss left side 1172, a boss right side 1173, a boss bottom surface 1174, a boss pushing surface 1175 and a boss top surface 1176. Specifically:

[0187] Fig.64 The isometric view of the overall structure of the support frame assembly 2 in the injection head A1, the support frame assembly 2 includes a push rod 21, a mounting frame 22 and a power unit 23. Among them, the step grooves 221 on the left and right sides of the mounting frame 22 are used to install the loading seat 110 of the syringe loading mechanism 100. Fig.65 and Fig.66 The specific structural diagram of the step groove 221 in the mounting frame 22 is shown below. A step groove bottom plate is provided at the bottom of the step groove 221. The step groove bottom plate is fixed or integrally connected to the mounting frame 22. The inner wall surface of the step groove 221 includes a step groove rear pull support surface 2211, a step groove left side surface 2212, a step groove right side surface 2213, a step groove bottom surface 2214, a step groove front push support surface 2215 and a step groove top surface 2216. The step groove bottom plate is also provided with a countersunk screw hole 22141. Preferably, force sensors are also installed at the front ends of the push rods 21 or other appropriate positions on both sides of the mounting frame 22, so as to detect the injection pressures of the contrast agent main channel groove 111 and the saline channel groove 112 when injecting the liquid medicine.

[0188] When installing the injection head A1, first install the support frame assembly 2 as shown in the figure. Fig.64 After installation as shown, the other components of the entire injection head A1 are installed on the support frame assembly 2: Fig.67 As shown, align the mounting boss 117 of the loading seat 110 in the syringe loading mechanism 100 with the step groove 221 of the mounting frame 22 and insert it downward, so that the mounting boss 117 can be positioned in the step groove 221 of the mounting frame 22, and then tighten the screw. Fig.68 As shown, the mounting boss 117 of the loading seat 110 includes a boss tension and pressure end 1171, a boss left side 1172, a boss right side 1173, a boss bottom 1174, a boss pushing surface 1175 and a boss top surface 1176. At this time, the boss top surface 1176 of the mounting boss 117 is tightly fitted with the top surface 2216 of the step groove 221; the boss left side 1172 and the boss right side 1173 of the mounting boss 117 are two surfaces in the width direction (Y direction) of the mounting boss 117, which are limited to the groove range between the left side 2212 and the right side 2213 of the step groove 221, and, in order to facilitate installation, it is designed to be a clearance fit, but due to the small clearance, the position of the mounting boss 117 in the width direction (Y direction) of the step groove 221 can also be limited. Fig.69 As shown, the boss pulling and pressing end 1171 and the boss pushing surface 1175 of the mounting boss 117 are two surfaces on the length direction (X direction) of the mounting boss 117, which are restricted within the groove range between the step groove rear pulling support surface 2211 and the step groove front pushing support surface 2215 of the step groove 221, and, for ease of installation, are designed to be a clearance fit, but due to the small clearance, the position of the mounting boss 117 in the length direction (X direction) of the step groove 221 can also be limited.

[0189] like Fig.70 and Fig.71 As shown, by installing the boss pulling and pressing end 1171, the boss left side 1172, the boss right side 1173, the boss pushing surface 1175, and the boss top surface 1176 of the boss 117 and cooperating with the step groove rear pull support surface 2211, the step groove left side 2212, the step groove right side 2213, the step groove front push support surface 2215, and the step groove top surface 2216 of the step groove 221, the loading seat 110 in the syringe loading mechanism 100 can be completely positioned in the mounting frame 22 of the support frame assembly 2. After positioning, as shown in FIG. Fig.68 As shown, by tightening the screws or bolt assemblies or other fasteners 10 in at least two countersunk screw holes 22141 of the step groove 221, the loading seat 110 of the syringe loading mechanism 100 can be locked in the mounting frame 22 of the support frame assembly 2.

[0190] Taking contrast medium syringe E as an example, when the high-pressure syringe draws the medicine, Fig.70 As shown, the push rod clamp 211 pulls the contrast agent syringe matching piston rod E5 to move backward. At this time, due to the internal friction of the contrast agent syringe body E1 and the atmospheric pressure, the step tension surface E33 of the end step E3 is pressed on the rear end surface 1151 of the groove 115 at the end of the loading seat. At this time, the step pressure surface E31 of the end step E3 of the contrast agent syringe E is separated from the front end surface 1152 of the groove 115 at the end of the loading seat.

[0191] During the drug inhalation process, the end spring member 114 will move backwards as shown in FIG. Fig.71 As shown in the elastic deformation, the end spring member 114 is always pressed against the concave end surface E35 and the concave step E36 of the end step E3 of the contrast agent syringe E, so that the contrast agent syringe E is stably loaded in the loading seat 110 of the syringe loading mechanism 100 during the drug inhalation process.

[0192] like Fig.72As shown, after the step tension surface E33 of the step E3 at the end of the contrast agent syringe E is subjected to the drug suction pulling force, the force is transmitted to the boss tension and compression end 1171 of the mounting boss 117 of the loading seat 110, and the boss tension and compression end 1171 and the step groove rear pull support surface 2211 of the step groove 221 on the mounting frame 22 of the support frame assembly 2 are in a relatively small clearance fit relationship. The drug suction pulling force will cause the boss tension and compression end 1171 to be pressed onto the step groove rear pull support surface 2211, so that the final force-bearing surface during drug suction is the step groove rear pull support surface 2211 of the step groove 221 on the mounting frame 22 of the support frame assembly 2.

[0193] When the high-pressure syringe injects the liquid medicine, taking the contrast agent syringe E as an example, at this time, the matching relationship between the end step E3 of the contrast agent syringe E, the mounting boss 117 of the loading seat 110, and the step groove 221 on the mounting frame 22 in the support frame assembly 2 is as follows: Fig.73 The push rod clamp 211 pushes the piston rod E5 of the contrast agent syringe to move forward. At this time, due to the internal friction of the contrast agent syringe body E1, that is, the flow resistance of the liquid medicine in the T-shaped spiral tube, the step pressure surface E31 of the end step E3 of the contrast agent syringe E is pressed tightly against the groove front end surface 1152 of the groove 115 at the end of the loading seat, and the groove front end surface 1152 of the groove 115 at the end of the loading seat transmits the pressure to the boss pushing surface 1175 of the mounting boss 117 of the contrast agent syringe E. The platform pushing surface 1175 and the step groove forward pushing support surface 2215 of the step groove 221 on the mounting frame 22 in the support frame assembly 2 are in a small clearance fit relationship. The injection thrust will cause the boss pushing surface 1175 of the mounting boss 117 to be pressed onto the step groove forward pushing support surface 2215 of the step groove 221 on the mounting frame 22 in the support frame assembly 2, so that the final force-bearing surface when injecting the medicine is the step groove forward pushing support surface 2215 of the step groove 221 on the mounting frame 22 in the support frame assembly 2.

[0194] When the contrast agent syringe E and the loading seat 110 of the syringe loading mechanism 100 are both made of plastic parts, the rigidity, strength and Young's elastic modulus are relatively small, and they may produce large elastic deformation or even plastic deformation when subjected to a large force; therefore, the step groove 221 on the mounting frame 22 in the support frame assembly 2 is made of non-magnetic materials such as aluminum alloy, copper alloy, titanium alloy, etc., and preferably, the mounting frame 22 is a metal frame, so that it can maintain sufficient rigidity when subjected to a large force.

[0195] Embodiment 2

[0196] This embodiment provides a syringe loading mechanism 100, which is applied to the injection head A1 provided in any optional implementation manner of the aforementioned embodiment 1.

[0197] Embodiment 3

[0198] This embodiment provides a high-pressure injector A, referring to Figures 1 to 3 The high-pressure injector A comprises an injection head A1 provided in any optional embodiment of the first embodiment, and preferably, as Figures 1 to 3 As shown, the high-pressure injector A includes, in addition to the injection head A1, cable A2, frame A3 and power box A5 described above, a height adjustment mechanism A4. Figure 1 As shown, the rack A3 is installed on the height adjustment mechanism A4, and the height adjustment mechanism A4 is installed on the power box A5. Preferably, the rack A3 is an internal hollow structure. After the cable A2 comes out of the injection head A1, it goes along the internal hollow structure of the rack A3, bypasses the height adjustment mechanism A4 or passes through the internal space of the height adjustment mechanism A4 and is finally connected to the power box A5.

[0199] The height adjustment mechanism A4 can be made of, but is not limited to, a cylinder piston rod assembly, an electric telescopic rod assembly, or a purely mechanical sleeve rod assembly structure, so that the height of the injection head A1 can be adjusted accordingly according to actual surgical needs through the height adjustment mechanism A4 to improve the ease of use of the high-pressure syringe A.

[0200] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.

Claims

1. An injection head, used for high-pressure injectors, Features: The injection head comprises: A shell, with the length direction of the shell as the X direction and the front-to-back direction, the width direction of the shell as the Y direction and the left-right direction, and the height direction of the shell as the Z direction and the up-down direction; The support frame assembly comprises a mounting frame, a push rod and a power unit; a push rod slot which penetrates in the X direction is provided inside the mounting frame, and convex ribs which protrude inwards are provided on two side surfaces which are opposite to each other at the front end Y of the push rod slot, so as to separate a step slot at the front end of the push rod slot; the mounting frame is mounted on the housing, the push rod is mounted inside the push rod slot, the power unit is mounted inside the housing and is connected to the rear end power of the push rod, and the power unit can push and pull the push rod so that the push rod can reciprocate along the X direction in the push rod slot; The syringe loading mechanism comprises a loading seat, the upper surface of which is provided with a loading channel groove for loading the injection syringe, the loading channel groove passes through the loading seat along the X direction, and a mounting boss is provided on the lower surface of the rear end of the loading seat; In the assembled state, the mounting boss is positioned in the step groove, and the loading channel groove is connected to the push rod sliding groove in the X direction.

2. The injection head according to claim 1, Features: A step groove bottom plate is provided at the bottom of the step groove, and the step groove bottom plate is fixed or integrally connected to the mounting frame. A Z-direction through screw hole is provided on the step groove bottom plate, and the screw hole is used to screw in a screw in the assembly state to fix the mounting boss in the step groove.

3. The injection head according to claim 1, Features: A Y-direction partition plate in the slideway fixedly connected to the mounting frame is provided inside the push rod slideway, a push rod through hole extending in the X direction is provided on the Y-direction partition plate, a clamping ring surrounding the push rod through hole is also installed on the front end surface of the Y-direction partition plate, and the push rod passes through the push rod through hole and the clamping ring; The shell includes an upper shell and a lower shell connected in the Z direction, the mounting frame is fixed between the upper shell and the lower shell, and the area where the push rod slide is located at the front end of the clamping ring and the upper surface of the loading seat are exposed outside the inner cavity of the shell, the push rod slide and the push rod are respectively located in the area outside the clamping ring and the power unit are all arranged in the inner cavity of the shell.

4. The injection head according to claim 3, Features: A mounting opening is also provided at a portion of the bottom of the lower shell body corresponding to the area of ​​the push rod slide groove located at the front end of the clamping ring, and a slide groove bottom support plate is detachably mounted in the mounting opening.

5. The injection head according to claim 1, Features: A push rod clamp is provided at the front end of the push rod, and the push rod clamp is used to clamp the rear end of the piston rod in the injection syringe.

6. The injection head according to claim 1, Features: In the loading seat, the loading channel groove includes a main channel groove, and cylinder spring pressing parts are respectively arranged on the two side walls of the main channel groove Y which are symmetrical upward.

7. The injection head according to claim 6, Features: The cylinder spring-pressing piece is in the shape of a long strip extending along the Z direction and spaced from the side wall of the main channel groove; the upper end of the cylinder spring-pressing piece is fixedly connected to the upper end of the side wall of the main channel groove, and the end face of the lower end of the cylinder spring-pressing piece is an arc surface convex toward the inner direction of the main channel groove.

8. The injection head according to claim 7, Features: In the Z direction, the bottom surface of the main channel groove is an arc surface; with the outer diameter of the barrel of the injection syringe being d1, the bottom diameter of the main channel groove being d2, and the minimum Y-direction spacing between the lower ends of the elastic pressure parts of the barrel on the symmetrical two side walls of the main channel groove being d3, the injection syringe satisfies d1=d2>d3 in the unloaded state.

9. The injection head according to claim 1, Features: An end step with an increased outer diameter is provided at the rear end of the barrel of the injection syringe; In the loading seat, the loading channel groove includes a main channel groove and a loading seat end groove which are interconnected in the X direction, the loading seat end groove is located at the rear end of the main channel groove, and the inner diameter of the loading seat end groove is larger than the inner diameter of the main channel groove, and the Z-direction depth of the loading seat end groove is larger than the Z-direction depth of the main channel groove; when the injection syringe is loaded, the barrel of the injection syringe is clamped in the main channel groove, and the end step of the injection syringe is clamped in the loading seat end groove.

10. The injection head according to claim 9, Features: In the X direction, an end spring pressing piece is provided on the front end surface or the rear end surface of the groove of the end portion of the loading seat.

11. The injection head according to claim 10, Features: The end spring-pressing piece is in the shape of a long strip extending along the Z direction and spaced from the inner wall of the groove. The lower end of the end spring-pressing piece is fixedly connected to the front end surface of the groove or the lower end of the rear end surface of the groove. The end surface of the upper end of the end spring-pressing piece is an arc surface protruding toward the inside of the end groove of the loading seat.

12. The injection head according to claim 11, Features: The X-direction spacing between the front end face of the groove and the rear end face of the groove is L1; and, one of the front end face of the groove and the rear end face of the groove that is fixedly connected to the lower end of the end spring-pressing member is the end spring-pressing member setting surface, and the other end face is the symmetric plane of the end spring-pressing member setting surface, and the X-direction spacing between the symmetric plane and the upper end arc surface of the end spring-pressing member is L2; ​​in the injection syringe, along the axial direction of the barrel, the front and rear end face spacing of the end step is L, then: L1>L>L2 is satisfied.

13. The injection head according to claim 1, Features: An optical coupler is provided inside the loading channel groove of the loading seat, and a light outlet of the detection light of the optical coupler is located in the Z-direction plane; A controller is disposed inside the housing; the controller comprises an optical coupling detection unit and an information processing unit; the optical coupling detection unit is connected to the optical coupler, and the optical coupling detection unit and the power unit are both connected to the information processing unit; When the loading channel slot is empty, the optical coupler sends an empty signal to the optical coupler detection unit, and the optical coupler detection unit receives and transmits the empty signal to the information processing unit. The information processing unit receives the empty signal and controls the push rod to retreat along the X direction to an empty state.

14. The injection head according to claim 13, Features: The controller also includes a storage unit and an alarm unit; The storage unit pre-stores drug spectrum detection characteristic information; The optical coupler detection unit is also capable of receiving and analyzing the spectrum information detected by the optical coupler, and transmitting the spectrum information to the information processing unit; The information processing unit is capable of retrieving the medicine spectrum detection characteristic information pre-stored in the storage unit, and comparing the received spectrum information with the retrieved characteristic information, and outputting an alarm signal to the alarm unit and the power unit when the spectrum information does not match the characteristic information; The alarm unit sends out an alarm signal when receiving the alarm signal, and the power unit is locked in a non-injection state when receiving the alarm signal.

15. The injection head according to any one of claims 1 to 5, Features: The syringe loading mechanism further comprises a pre-filling assembly; the pre-filling assembly comprises a pre-filled syringe adapter; The prefilled syringe adapter includes an adapter seat, and a prefilled syringe loading groove for loading prefilled syringes is provided on the upper surface of the adapter seat. The prefilled syringe loading groove passes through the adapter seat along the X direction. When the adapter is assembled, the adapter seat is positioned in the loading channel groove of the syringe loading mechanism.

16. The injection head according to any one of claims 6 to 8, Features: The syringe loading mechanism further comprises a pre-filling assembly; the pre-filling assembly comprises a pre-filled syringe adapter; The prefilled syringe adapter comprises an adapter seat, the upper surface of which is provided with a prefilled syringe loading groove for loading the prefilled syringe, the prefilled syringe loading groove passes through the adapter seat along the X direction, and when the adapter is assembled, the adapter seat is positioned in the loading channel groove of the syringe loading mechanism; An outer wall column is provided on the outer peripheral wall of the adapter seat. In the assembled state, the outer wall column presses against the cylinder elastic pressing part.

17. The injection head according to any one of claims 9 to 12, Features: The syringe loading mechanism further comprises a pre-filling assembly; the pre-filling assembly comprises a pre-filled syringe adapter; The prefilled syringe adapter comprises an adapter seat, the upper surface of which is provided with a prefilled syringe loading groove for loading the prefilled syringe, the prefilled syringe loading groove passes through the adapter seat along the X direction, and when the adapter is assembled, the adapter seat is positioned in the loading channel groove of the syringe loading mechanism; An end boss is provided on the lower surface of the rear end of the adapter seat. In the assembled state, the end boss is positioned in the end groove of the loading seat.

18. The injection head according to claim 17, It is characterized in that In the loading seat, groove undercut steps protruding toward the middle of the groove at the end of the loading seat are respectively provided at the upper part of the two side walls symmetrically upwardly in the groove Y of the end of the loading seat; along the Z direction, the side surface of the side wall located above the groove undercut step forms a groove inclined guide surface that makes the inner diameter of the groove at the end of the loading seat gradually increase upward from the groove undercut step, and the side surface located below the groove undercut step forms a groove guide side surface; In the adapter seat, the side surface of the end boss includes an elastic buckle, and the elastic buckle is provided with a step portion on the radial outer surface of the adapter seat. In the assembled state, the step portion of the elastic buckle is engaged with the Z-direction bottom of the inverted step of the groove.

19. The injection head according to claim 16, It is characterized in that In the adapter seat, the pre-filled syringe loading slot includes a main loading slot, and spring buckles are respectively arranged on the two side walls of the main loading slot Y which are symmetrical upward.

20. The injection head according to claim 16, It is characterized in that The rear end of the barrel of the prefilled syringe is provided with an end clamping ring with an increased outer diameter; In the adapter seat, the prefilled syringe loading slot includes a main loading slot and an adapter end groove which are interconnected in the X direction, and the adapter end groove is located at the rear end of the main loading slot; the Z-direction depth of the adapter end groove is greater than the Z-direction depth of the main loading slot; in the prefilled syringe loading state, the barrel of the prefilled syringe is clamped in the main loading slot, and the end clamp ring of the prefilled syringe is clamped in the adapter end groove.

21. The injection head according to claim 20, It is characterized in that An end snap buckle is arranged on the front side surface or the rear side surface of the groove of the end groove of the adapter.

22. The injection head according to claim 13 or 14, Features: The syringe loading mechanism further comprises a pre-filling assembly; the pre-filling assembly comprises a pre-filled syringe adapter; The prefilled syringe adapter comprises an adapter seat, the upper surface of which is provided with a prefilled syringe loading groove for loading the prefilled syringe, the prefilled syringe loading groove passes through the adapter seat along the X direction, and when the adapter is assembled, the adapter seat is positioned in the loading channel groove of the syringe loading mechanism; An optical coupler clearance groove that does not block the detection light of the optical coupler is provided on the peripheral wall of the adapter seat, and the Z-direction depth of the prefilled syringe loading groove satisfies that when the prefilled syringe is loaded in the prefilled syringe loading groove, the detection light of the optical coupler is blocked by the prefilled syringe.

23. The injection head according to claim 15, Features: A top plate is provided at the top of both sides of the adapter seat in the X direction, a first pressure column is provided on the bottom surface of one of the top plates, and a second pressure column is provided on the bottom surface of the other top plate; A sensor group is provided on the upper surface of the loading seat at the two sides of the loading channel groove; the upper surface of the loading seat at the two sides of the loading channel groove are respectively the upper surface of the first side in the X direction and the upper surface of the second side in the X direction, and the sensor group includes a first sensor and a second sensor provided on the upper surface of the first side and spaced apart in the X direction, and a third sensor and a fourth sensor provided on the upper surface of the second side and spaced apart in the X direction; When the adapter is in a loaded state, the first pressure column contacts the first sensor or the second sensor to trigger the corresponding sensor, and the second pressure column contacts the third sensor or the fourth sensor to trigger the corresponding sensor.

24. The injection head according to claim 23, Features: A controller is arranged inside the housing of the injection head; the controller comprises a storage unit and an information processing unit connected to each other; The storage unit pre-stores a plurality of sensor triggering combination forms to represent various adapter models respectively, and presets a plurality of push rod retreat distances in correspondence with the plurality of sensor triggering combination forms; Each sensor in the sensor group and the power unit are connected to the information processing unit, and the information processing unit can receive the signal sent after the sensor group is triggered, and retrieve the information pre-stored in the storage unit, and compare the received signal with the pre-stored combination of the sensor triggers, match the corresponding push rod retreat distance, and transmit it to the power unit. After receiving the push rod retreat distance information instruction, the power unit retreats the push rod accordingly.

25. The injection head according to claim 1, Features: A force sensor for detecting the injection pressure when injecting the medicinal solution is arranged on the push rod.

26. A syringe loading mechanism, Features: Applicable to the injection head described in any one of claims 1-25.

27. A high pressure injector, Features: Comprising the injection head described in any one of claims 1-25.

28. The high-pressure injector according to claim 27, Features: The high-pressure injector also includes a cable, a frame, a height adjustment mechanism and a power supply box; The height adjustment mechanism is installed on the top of the power box, the frame is installed on the height adjustment mechanism, the injection head is installed on the frame, and the injection head can rotate in the vertical direction relative to the rotating axis on the frame; the cable connects the injection head and the power box.

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