High-pressure injector

Abstract

The high-pressure injector comprises an injector body and a needle cylinder, a chuck assembly is arranged at the far end of the injector body and comprises a chuck and a first locking assembly, the chuck is provided with an opening allowing the needle cylinder to be inserted, and the first locking assembly comprises a first shifting wheel detachably connected with the needle cylinder in a clamped mode. The limiting plate is fixedly arranged and provided with a channel for a needle cylinder to pass through, the first check block and the first reset spring are movably arranged, the first poking wheel can rotate around the axial direction of the first poking wheel and drive the needle cylinder to rotate, the first poking wheel is provided with a first limiting groove extending in the circumferential direction of the first poking wheel, and the limiting plate is provided with a second limiting groove extending in the radial direction of the channel; the first check block is provided with a first bearing, the first bearing penetrates through the second limiting groove to be movably connected with the first limiting groove, one end of the first reset spring is fixedly connected with the inner wall of the chuck, and the other end of the first reset spring is fixedly connected with the first check block. The needle cylinder can be directly inserted and locked, the operation is convenient and labor-saving, the structural stability is good, and the service life is long.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a high-pressure syringe. Background Art

[0002] A high-pressure syringe is a commonly used medical device, mainly used to inject a sufficient amount, quickly and accurately, of contrast agent or saline into the required part of the human body. For example, it is used to inject contrast agent into the examination site for diagnostic imaging and treatment of the lesion site. The syringe barrel of the high-pressure syringe needs to be replaced in a timely manner. When installing the syringe barrel on a common high-pressure syringe, after the syringe barrel is inserted, it is necessary to rotate the syringe barrel by a certain angle with force to lock and fix the syringe barrel, which is rather troublesome during operation. Occasionally, the rotation is not in place, resulting in a liquid leakage problem during use. When it is necessary to remove the syringe barrel, it is necessary to rotate the syringe barrel forcefully to its initial position before it can be removed. Moreover, the high-pressure syringe is driven by a motor for injection, and there is a risk of accidentally touching the switch when the syringe barrel is not installed in place. Therefore, when designing a new high-pressure syringe, the simplicity and safety of operation are the design goals of the automatic high-pressure syringe. In addition, frequent replacement of the syringe barrel will inevitably cause wear to the connecting parts. When designing a high-pressure syringe, extending the service life of the high-pressure syringe is also one of the design goals. Summary of the Invention

[0003] The purpose of the utility model is to provide a new type of high-pressure syringe.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A high-pressure syringe, comprising a syringe body and a syringe barrel. A chuck assembly for clamping and connecting the syringe barrel is provided at the distal end of the syringe body. The chuck assembly includes a chuck and a first locking assembly disposed within the chuck for locking the syringe barrel onto the chuck. The chuck is provided with an opening for inserting the proximal end of the syringe barrel. The first locking assembly includes a first dial wheel detachably clamped to the proximal end of the syringe barrel, a fixed limit plate having a passage for the proximal end of the syringe barrel to pass through, a movably disposed first stop block, and a first return spring. The first dial wheel can rotate about its own axis and drive the syringe barrel clamped thereto to rotate about its own axis. The first dial wheel is provided with a first limiting groove extending along its circumferential direction. The limit plate is provided with a second limiting groove extending along the radial direction of the passage. The first stop block is provided with a first bearing. The first bearing passes through the second limiting groove and is movably connected to the first limiting groove relatively. One end of the first return spring is fixedly connected to the inner wall of the chuck, and the other end is fixedly connected to the first stop block. The first stop block has a first working position and a second working position. When the first stop block is in the first working position, part or all of the vertical projection of the first stop block on the limit plate is located in the passage. When the first stop block is in the second working position, the vertical projection of the first stop block on the limit plate is located outside the passage.

[0006] Specifically, the extending direction of the first return spring is consistent with the extending direction of the second limiting groove. When the first return spring is in the natural state, the first stop block is in the first working position. When the first return spring is in the compressed state, the first stop block is in the second working position.

[0007] Specifically, the first limiting groove gradually approaches the center of the first dial wheel from one end to the other end.

[0008] Specifically, a gear is provided on the inner side surface of the first dial wheel. Ribs capable of meshing with the gear, a conical boss with a distal outer diameter larger than the proximal outer diameter, and a retaining ring with an outer diameter larger than the outer diameter of the opening of the chuck are sequentially arranged on the outer side wall of the syringe barrel from its proximal end to its distal end.

[0009] Specifically, one of the first stop block and the limit plate is provided with a third limiting groove extending along the radial direction of the passage, and the other is provided with a second bearing. The second bearing is slidably connected to the third limiting groove relatively, which can not only further ensure the movement of the first stop block along the radial direction of the passage but also improve the overall stability of the first locking assembly.

[0010] Further, at least two second bearings are distributed on both sides of the first bearing, and at least two corresponding third limiting grooves are provided.

[0011] Specifically, a plurality of the first stoppers are arranged at intervals in the circumferential direction of the channel, a plurality of the first limiting grooves are correspondingly arranged at intervals in the circumferential direction of the first dial, and a plurality of the second limiting grooves are correspondingly arranged on the limiting plate, which improves the clamping effect on the syringe barrel and the overall stability of the first locking assembly at the same time.

[0012] Specifically, the high-pressure syringe is a multi-channel high-pressure syringe, the chuck is provided with a plurality of non-interfering openings, and a plurality of non-interfering locking assemblies are arranged in the chuck. Multiple groups of locking assemblies can share a limiting plate, and a plurality of channels for the proximal end of the syringe barrel to pass through are correspondingly arranged on the limiting plate, and second limiting grooves are respectively arranged corresponding to each channel.

[0013] Specifically, a piston is arranged in the syringe barrel, a push rod capable of moving axially is arranged in the syringe body, and the distal end of the push rod is detachably connected to the piston.

[0014] More specifically, a second locking assembly capable of locking the piston on the distal end of the push rod is arranged between the push rod and the piston. The second locking assembly includes an annular fixed seat fixedly arranged around the outside of the distal end of the push rod, a convex block extending outward from the middle of the distal end of the push rod, a second dial sleeved outside the convex block and capable of rotating around its own axis, an end cover fixedly arranged on the convex block and having its proximal end in contact with the distal end of the second dial, a second stopper arranged in the end cover, a second return spring arranged between the second stopper and the convex block and capable of driving the second stopper to move, a third return spring arranged between the second dial and the annular fixed seat and capable of driving the second dial to rotate, a locking portion is arranged on the inner side wall of the piston, a matching portion capable of being cooperatively connected with the locking portion is arranged on the outer side wall of the second dial, an arc-shaped stopper with an arc opening facing the convex block is arranged on the second dial, the second stopper is provided with a fixed shaft, the fixed shaft is slidably abutted against the arc-shaped stopper relatively, an avoidance opening for the movement of the second stopper is formed in the end cover, the second dial is provided with an insertion block, the annular fixed seat is provided with a circumferentially extending receiving groove with an opening facing the second dial, the insertion block is movably inserted into the receiving groove, the third return spring is located in the receiving groove, one end of the third return spring abuts against the side wall of the receiving groove, and the other end abuts against the insertion block. When the second return spring is in a natural state, a part of the second stopper passes through the avoidance opening and is exposed outside the end cover, and at this time the third return spring is in a natural state; when the second return spring is in a compressed state, the second stopper is located inside the end cover, and at this time the third return spring is in a compressed state.

[0015] More specifically, the free end surface of the second stopper is an inclined surface that gradually inclines away from the bump in the direction from the distal end to the proximal end, reducing the resistance of the relative movement between the second stopper and the piston, and further making it effortless to install the syringe barrel.

[0016] More specifically, the second dial is provided with two symmetrically arranged insertion blocks, and two of the third return springs are arranged symmetrically along the circumferential direction of the annular fixing seat.

[0017] More specifically, the first dial and the second dial are coaxial. In the same circumferential direction, the first limiting groove gradually approaches the center of the first dial. The same circumferential direction refers to the clockwise direction or the counterclockwise direction.

[0018] Specifically, a plurality of the second stoppers are arranged at intervals along the outer circumference of the bump, a plurality of the arc-shaped stoppers are correspondingly arranged at intervals along the circumferential direction of the second dial, and a plurality of the avoidance openings are correspondingly arranged at intervals on the end cover, improving the locking effect and stability between the piston and the end cover.

[0019] Specifically, the locking portion is a rib, and the fitting portion is a rib groove between two ribs provided on the outer side wall of the second dial.

[0020] Specifically, the first stopper is provided with a spring groove, and one end of the first return spring is inserted into the spring groove. The second stopper is provided with a spring support column, and the second return spring is sleeved on the spring support column.

[0021] Specifically, the syringe body includes a housing, a driving assembly arranged in the housing for driving the push rod to move axially, and a circuit board arranged on the housing for controlling the operation of the driving assembly. The high-pressure syringe further includes a microswitch arranged on the chuck, and the microswitch is connected to the circuit board.

[0022] More specifically, the driving assembly includes a motor, a synchronous belt mechanism connected to the rotating shaft of the motor, a lead screw nut pair connected to the synchronous belt mechanism, a fixedly arranged guide rod, and a slider slidably arranged on the guide rod and simultaneously connected to the lead screw nut pair and the push rod. The slider drives the push rod to move when sliding along the guide rod.

[0023] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0024] The high-pressure syringe of the present utility model can achieve direct insertion and locking of the syringe barrel, and at the same time, the push rod directly inserts into the piston and locks the piston. By selecting the syringe barrel with a relatively small force, the syringe barrel and the piston can be unlocked simultaneously, which is convenient and labor-saving in operation. The connecting component between the syringe barrel and the syringe body of the present utility model has good structural stability and a long service life. Further, the high-pressure syringe of the present utility model can achieve in-position detection of the syringe barrel, automatically identify the syringe barrel to prevent misoperation, and has better safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Schematic perspective structure diagram of the high-pressure syringe of the embodiment;

[0027] Figure 2 Schematic partial perspective structure diagram of the high-pressure syringe of the embodiment (hiding the housing, chuck and part of the syringe barrel);

[0028] Figure 3 Schematic partial side view structure diagram of the high-pressure syringe of the embodiment (hiding the housing, chuck and part of the syringe barrel);

[0029] Figure 4 Schematic structure diagram of some parts of the high-pressure syringe of the embodiment;

[0030] Figure 5 For Figure 4 Schematic structure diagram from another perspective (hiding the end cap and the second dial);

[0031] Figure 6 For Figure 5 front view structure diagram of;

[0032] Figure 7 Schematic front view structure diagram of the high-pressure syringe of the embodiment;

[0033] Figure 8 For Figure 7 cross-sectional structure diagram along A-A in;

[0034] Figure 9 For Figure 7 cross-sectional structure diagram along B-B in;

[0035] Figure 10 For Figure 7 cross-sectional structure diagram along C-C in;

[0036] Figure 11 Schematic three-dimensional structure diagram of the push rod of the high-pressure syringe in the embodiment;

[0037] Figure 12 is Figure 11 Schematic three-dimensional structure diagram after the piston is hidden;

[0038] Figure 13 is Figure 12 Schematic three-dimensional structure diagram after the push rod and the annular fixing seat are hidden;

[0039] Figure 14 is Figure 13 front view of

[0040] Figure 15 is Figure 12 Schematic three-dimensional structure diagram after the end cap is hidden;

[0041] Figure 16 is Figure 15 side view of

[0042] Figure 17 is Figure 15 Schematic three-dimensional structure diagram after the second dial is hidden;

[0043] Figure 18 is Figure 17 front view of

[0044] Figure 19 is Figure 17 side view of ,

[0045] In the above figures: 1. Syringe body; 11. Push rod; 12. Motor; 13. Synchronous belt mechanism; 14. Ball screw nut pair; 15. Guide rod; 16. Slide block; 2. Syringe barrel; 21. Piston; 3. Chuck assembly; 31. First dial; 311. First limit groove; 312. Gear; 32. Limit plate; 321. Second limit groove; 322. Second bearing; 33. First stop block; 331. First bearing; 332. Third limit groove; 34. First return spring; 35. Chuck; 41. Annular fixing seat; 42. Protrusion; 43. Second dial; 431. Arc-shaped stop block; 44. End cap; 45. Second stop block; 451. Fixed shaft; 46. Second return spring; 47. Third return spring. Detailed implementation manners

[0046] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0047] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0048] In the description of the present utility model, it should be understood that the distal end refers to the end of the instrument or component away from the operator, and the proximal end refers to the end of the instrument or component close to the operator; the axial direction refers to the direction parallel to the center line connecting the distal end and the proximal end of the instrument or component, and the radial direction refers to the direction perpendicular to the axial direction; inside and outside are positions defined by the distance relative to the center of the instrument or component, where inside is the position close to the center of the instrument or component and outside is the position away from the center of the instrument or component. The description of the above orientation terms is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present utility model.

[0049] In the description of the present utility model, unless otherwise clearly specified and limited, terms such as "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0050] In the description of the present utility model, "a plurality" means two or more. Embodiment

[0051] As Figures 1 to 19 shown, this embodiment provides a high-pressure syringe device, which includes a separately arranged syringe body 1 and a syringe barrel 2.

[0052] On the outer side wall of the syringe barrel 2, ribs, a conical boss with a distal outer diameter larger than the proximal outer diameter, and a retaining ring with an outer diameter larger than the outer diameter of the opening of the chuck 35 are sequentially arranged from its proximal end to the distal end. A piston 21 is arranged inside the syringe barrel 2. A stepped structure extends inward at the bottom of the piston 21, and ribs are arranged on the inner side wall at the bottom of the piston 21.

[0053] The syringe body 1 includes a housing, a push rod 11 arranged inside the housing and capable of moving axially and extending out of the housing, a driving component arranged inside the housing for driving the push rod 11 to move axially, and a circuit board arranged on the housing for controlling the operation of the driving component. The driving component includes a motor 12, a synchronous belt mechanism 13 connected to the rotating shaft of the motor 12, a lead screw nut pair 14 connected to the synchronous belt mechanism 13, a fixed guide rod 15, and a slider 16 slidably arranged on the guide rod 15 and simultaneously connected to the lead screw nut pair 14 and the push rod 11. The slider 16 drives the push rod 11 to move when sliding along the guide rod 15.

[0054] The distal end of the syringe body 1 is provided with a chuck assembly 3 for clamping and connecting the syringe barrel 2. The chuck assembly 3 includes a chuck 35 and a first locking assembly disposed within the chuck 35 for locking the syringe barrel 2 onto the chuck 35. The chuck 35 is provided with an opening for the proximal end of the syringe barrel 2 to be inserted. The first locking assembly includes a first dial 31 detachably clamped to the proximal end of the syringe barrel 2, a fixed limit plate 32 having a channel for the proximal end of the syringe barrel 2 to pass through, a movably disposed first stop block 33, and a first return spring 34. The first dial 31 is capable of rotating about its own axis and driving the syringe barrel 2 clamped thereto to rotate about its own axis. The first dial 31 is provided with a first limiting groove 311 extending along its circumferential direction. The limit plate 32 is provided with a second limiting groove 321 extending in the radial direction of the channel. The first stop block 33 is provided with a first bearing 331. The first bearing 331 passes through the second limiting groove 321 and is movably connected to the first limiting groove 311 relatively. One end of the first return spring 34 is fixedly connected to the inner wall of the chuck 35, and the other end is fixedly connected to the first stop block 33. The first stop block 33 has a first working position and a second working position. When the first stop block 33 is in the first working position, part or all of the vertical projection of the first stop block 33 on the limit plate 32 is located in the channel. When the first stop block 33 is in the second working position, the vertical projection of the first stop block 33 on the limit plate 32 is located outside the channel.

[0055] In this embodiment, the extending direction of the first return spring 34 is consistent with the extending direction of the second limiting groove 321. The first limiting groove 311 gradually approaches the center of the first dial 31 from one end to the other end. One of the first stop block 33 and the limit plate 32 is provided with a third limiting groove 332 extending in the radial direction of the channel, and the other is provided with a second bearing 322. The second bearing 322 is slidably connected to the third limiting groove 332 relatively. Two second bearings 322 are provided on each first stop block 33 and are distributed on both sides of the first bearing 331, and two third limiting grooves 332 are correspondingly provided. Three first stop blocks 33 are evenly spaced along the circumferential direction of the channel, three first limiting grooves 311 are correspondingly spaced along the circumferential direction of the first dial 31, and three second limiting grooves 321 are correspondingly provided on the limit plate 32.

[0056] The distal end of the push rod 11 is detachably connected to the piston 21. A second locking assembly capable of locking the piston 21 to the distal end of the push rod 11 is provided between the push rod 11 and the piston 21. The second locking assembly includes an annular fixed seat 41 fixedly disposed around the outside of the distal end of the push rod 11, a bump 42 extending outward from the middle of the distal end of the push rod 11, a second dial 43 sleeved outside the bump 42 and capable of rotating about its own axis, an end cover 44 fixedly sleeved on the bump 42 and having its proximal end in contact with the distal end of the second dial 43, a second stop block 45 disposed in the end cover 44, a second return spring 46 capable of driving the second stop block 45 to move and disposed between the second stop block 45 and the bump 42, a third return spring 47 capable of driving the second dial 43 to rotate and disposed between the second dial 43 and the annular fixed seat 41, a locking portion provided on the inner side wall of the piston 21, a mating portion capable of being cooperatively connected with the locking portion provided on the outer side wall of the second dial 43, an arc-shaped stop block 431 with an arc opening facing the bump 42 provided on the second dial 43, a fixed shaft 451 provided on the second stop block 45, the side wall of the fixed shaft 451 being slidably abutted against the side wall of the arc-shaped stop block 431, an avoidance opening for the movement of the second stop block 45 provided on the end cover 44, an insertion block 432 provided on the second dial 43, an accommodating groove extending circumferentially with an opening facing the second dial 43 provided on the annular fixed seat 41, the insertion block 432 being movably inserted into the accommodating groove, the third return spring 47 being located in the accommodating groove, one end of the third return spring 47 being abutted against the side wall of the accommodating groove and the other end being abutted against the insertion block 432. When the second return spring 46 is in a natural state, a part of the second stop block 45 passes through the avoidance opening and protrudes outside the end cover 44, and at this time the third return spring 47 is in a natural state; when the second return spring 46 is in a compressed state, the second stop block 45 is located inside the end cover 44, and at this time the third return spring 47 is in a compressed state.

[0057] In this embodiment, the free end face of the second stopper 45 is an inclined plane that gradually inclines away from the bump 42 from the distal end to the proximal end. The first dial 31 and the second dial 43 are coaxial. In the same circumferential direction, the first limiting groove 311 gradually approaches the center of the first dial 31, and the arc-shaped stopper 431 gradually moves away from the center of the second dial 43. Three second stoppers 45 are evenly spaced along the outer circumference of the bump 42, three arc-shaped stoppers 431 are correspondingly spaced along the circumferential direction of the second dial 43, and three avoidance openings are correspondingly spaced on the end cover 44. The second dial 43 is provided with two symmetrically arranged insertion blocks 432, and two third return springs 47 are symmetrically arranged along the circumferential direction of the annular fixing seat 41 in a mirror image manner. The locking portion on the piston 21 is a rib, and the cooperating portion is a rib groove between two ribs provided on the outer side wall of the second dial 43. The first stopper 33 is provided with a spring groove, and one end of the first return spring 34 is inserted into the spring groove. The second stopper 45 is provided with a spring support column, the second return spring 46 is sleeved on the spring support column, the spring support column is axially slidably inserted into the protrusion 42, one end of the second return spring 46 abuts against the side wall of the protrusion 42, and the other end abuts against the side wall of the second stopper 45.

[0058] The high-pressure syringe of this embodiment is a dual-channel high-pressure syringe. The chuck 35 is provided with two non-interfering openings, and two non-interfering locking assemblies are provided in the chuck 35. The two locking assemblies can share a limiting plate 32. Two channels for the proximal end of the syringe barrel 2 to pass through are correspondingly provided on the limiting plate 32, and second limiting grooves 321 are correspondingly provided for each channel.

[0059] When the high-pressure syringe of the present utility model is in the initial state (without the syringe barrel 2 installed), the first return spring 34, the second return spring 46, and the third return spring 47 are all in the natural state. Part of the vertical projection of the first stopper 33 on the limiting plate 32 is located in the channel, and part of the second stopper 45 passes through the avoidance opening and is exposed outside the end cover 44.

[0060] When the syringe barrel 2 is inserted into the chuck 35, the conical boss of the syringe barrel 2 presses the first stopper 33, and the first stopper 33 retracts along the second limiting groove 321, and the first limiting spring is compressed. When the syringe barrel 2 passes through the conical boss, the first stopper 33 moves along the second limiting groove 321 under the action of the first limiting spring until it abuts against the side wall of the syringe barrel 2, making a "click" sound and locking the syringe barrel 2. When the syringe barrel 2 is inserted, the piston 21 inside the syringe barrel 2 is also inserted together. The stepped structure of the piston 21 presses the inclined plane of the second stopper 45, causing the second stopper 45 to retract, and the second return spring 46 is compressed. When the step passes the second stopper 45, the pressing force disappears, and the second stopper 45 extends under the action of the second return spring 46, thereby locking the piston 21. At this time, the push rod 11 can push the piston 21 forward or backward, and when the syringe barrel 2 is inserted in place, the micro switch will be automatically triggered.

[0061] When it is necessary to remove the syringe barrel 2, rotate the syringe barrel 2 counterclockwise. The syringe barrel 2 drives the first dial 31 to rotate, driving the first stopper 33 to retract along the second limiting groove 321, and the syringe barrel 2 is unlocked. At the same time, under the action of friction, the piston 21 also rotates with the syringe barrel 2. The piston 21 drives the second dial 43 to rotate, driving the second stopper 45 to retract, and the piston 21 is unlocked, so that it can be pulled out together with the syringe barrel 2.

[0062] After the syringe barrel 2 is pulled out, the second dial 43 is reset under the action of the third return spring 47, and the second stopper 45 extends under the action of the second return spring 46 to restore the initial state.

[0063] The high-pressure syringe of this embodiment can achieve direct insertion and locking of the syringe barrel 2. At the same time, the push rod 11 is directly inserted into the piston 21 and locks the piston 21. By selecting the syringe barrel 2 with a relatively small force, the syringe barrel 2 and the piston 21 can be unlocked simultaneously, which is convenient and labor-saving in operation. The connecting component between the syringe barrel 2 and the syringe body 1 of the high-pressure syringe of this embodiment has good structural stability and a long service life.

[0064] In this embodiment, the high-pressure syringe further includes a micro switch provided on the chuck 35. The micro switch is connected to the circuit board, so as to realize the in-place detection of the syringe barrel 2, automatically identify the syringe barrel 2 to prevent misoperation, and the safety is better.

[0065] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-pressure syringe, comprising a syringe body (1) and a syringe barrel (2), characterized in that, The distal end of the syringe body (1) is provided with a chuck assembly (3) for clamping and connecting the syringe barrel (2). The chuck assembly (3) includes a chuck (35) and a first locking assembly disposed within the chuck (35) for locking the syringe barrel (2) onto the chuck (35). The chuck (35) is provided with an opening for the proximal end of the syringe barrel (2) to be inserted. The first locking assembly includes a first dial (31) detachably clamped to the proximal end of the syringe barrel (2), a fixed limiting plate (32) having a passage for the proximal end of the syringe barrel (2) to pass through, a movably disposed first stopper (33), and a first return spring (34). The first dial (31) is capable of rotating about its own axis and driving the syringe barrel (2) clamped thereto to rotate about its own axis. The first dial (31) is provided with a first limiting groove (311) extending along its circumferential direction. The limiting plate (32) is provided with a second limiting groove (321) extending in the radial direction of the passage. The first stopper (33) is provided with a first bearing (331). The first bearing (331) passes through the second limiting groove (321) and is movably connected to the first limiting groove (311) relatively. One end of the first return spring (34) is fixedly connected to the inner wall of the chuck (35), and the other end is fixedly connected to the first stopper (33). The first stopper (33) has a first working position and a second working position. When the first stopper (33) is in the first working position, part or all of the vertical projection of the first stopper (33) on the limiting plate (32) is located in the passage. When the first stopper (33) is in the second working position, the vertical projection of the first stopper (33) on the limiting plate (32) is located outside the passage.

2. The high-pressure syringe according to claim 1, wherein The extending direction of the first return spring (34) is consistent with the extending direction of the second limiting groove (321). When the first return spring (34) is in the natural state, the first stopper (33) is in the first working position. When the first return spring (34) is in the compressed state, the first stopper (33) is in the second working position.

3. The high-pressure syringe according to claim 1, wherein The first limiting groove (311) gradually approaches the center of the first dial (31) from one end to the other end.

4. The high-pressure syringe according to claim 1, characterized in that, A gear (312) is provided on the inner side surface of the first dial (31). Ribs capable of meshing with the gear (312), a conical boss with a distal outer diameter larger than the proximal outer diameter, and a retaining ring with an outer diameter larger than the outer diameter of the opening of the chuck (35) are sequentially arranged on the outer side wall of the syringe barrel (2) from its proximal end to the distal end.

5. The high-pressure syringe according to claim 1, characterized in that, One of the first stopper (33) and the limiting plate (32) is provided with a third limiting groove (332) extending in the radial direction of the passage, and the other is provided with a second bearing. The second bearing is slidably connected to the third limiting groove (332) relatively.

6. The high-pressure syringe according to claim 5, characterized in that The second bearing includes at least two distributed on both sides of the first bearing (331), and the third limiting groove (332) includes at least two correspondingly arranged ones.

7. The high-pressure syringe according to claim 1, characterized in that, A plurality of the first stoppers (33) are arranged at intervals in the circumferential direction of the channel, a plurality of the first limiting grooves (311) are correspondingly arranged at intervals in the circumferential direction of the first dial wheel (31), and a plurality of the second limiting grooves (321) are correspondingly arranged on the limiting plate (32).

8. The high-pressure syringe according to claim 1, characterized in that, The high-pressure syringe is a multi-channel high-pressure syringe. The chuck (35) is provided with a plurality of non-interfering openings, and a plurality of non-interfering locking components are arranged in the chuck (35).

9. The high-pressure syringe according to claim 1, wherein A piston (21) is arranged in the syringe barrel (2), a push rod (11) capable of moving axially is arranged in the syringe body (1), and the distal end of the push rod (11) is detachably connected to the piston (21).

10. The high-pressure syringe according to claim 9, characterized in that, A second locking assembly capable of locking the piston (21) on the distal end of the push rod (11) is provided between the push rod (11) and the piston (21). The second locking assembly includes an annular fixed seat (41) fixedly arranged around the outside of the distal end of the push rod (11), a bump (42) extending outward from the middle of the distal end of the push rod (11), a second dial (43) sleeved on the outside of the bump (42) and capable of rotating around its own axis, an end cover (44) fixedly sleeved on the bump (42) and having its proximal end in contact with the distal end of the second dial (43), a second stop block (45) arranged in the end cover (44), a second return spring (46) arranged between the second stop block (45) and the bump (42) and capable of driving the second stop block (45) to move, a third return spring (47) arranged between the second dial (43) and the annular fixed seat (41) and capable of driving the second dial (43) to rotate. A locking portion is provided on the inner side wall of the piston (21), and a mating portion capable of mating and connecting with the locking portion is provided on the outer side wall of the second dial (43). The second dial (43) is provided with an arc-shaped stop block (431) with an arc opening facing the bump (42). The second stop block (45) is provided with a fixed shaft (451), and the fixed shaft (451) is slidably abutted against the arc-shaped stop block (431). An avoidance opening for the movement of the second stop block (45) is formed in the end cover (44). The second dial (43) is provided with an insertion block (432). The annular fixed seat (41) is provided with a circumferentially extending receiving groove with an opening facing the second dial (43). The insertion block (432) is movably inserted into the receiving groove. The third return spring (47) is located in the receiving groove. One end of the third return spring (47) abuts against the side wall of the receiving groove, and the other end abuts against the insertion block (432). When the second return spring (46) is in a natural state, a part of the second stop block (45) passes through the avoidance opening and protrudes outside the end cover (44), and at this time the third return spring (47) is in a natural state; when the second return spring (46) is in a compressed state, the second stop block (45) is located inside the end cover (44), and at this time the third return spring (47) is in a compressed state.

11. The high-pressure syringe according to claim 10, wherein, The free end face of the second stop block (45) is an inclined surface that gradually inclines away from the bump (42) from the distal end to the proximal end.

12. The high-pressure syringe according to claim 10, characterized in that, The second dial (43) is provided with two symmetrically arranged insertion blocks (432), and two third return springs (47) are arranged symmetrically along the circumference of the annular fixed seat (41).

13. The high-pressure syringe according to claim 12, wherein: The first dial (31) and the second dial (43) are coaxial. In the same circumferential direction, the first limiting groove (311) gradually approaches the center of the first dial (31).

14. The high-pressure syringe according to claim 10, characterized in that, A plurality of the second stoppers (45) are arranged at intervals along the outer periphery of the bump (42), a plurality of the arc-shaped stoppers (431) are arranged at corresponding intervals along the circumferential direction of the second dial (43), and a plurality of the avoidance openings are arranged at corresponding intervals on the end cover (44).

15. The high-pressure syringe according to claim 10, characterized in that, The locking portion is a rib, and the fitting portion is a rib groove between two ribs provided on the outer side wall of the second dial (43).

16. The high-pressure syringe according to claim 9, wherein The syringe body (1) includes a housing, a driving assembly provided in the housing for driving the push rod (11) to move axially, and a circuit board provided on the housing for controlling the operation of the driving assembly. The high-pressure syringe further includes a micro switch provided on the chuck (35), and the micro switch is connected to the circuit board.

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