Multi-functional continuous syringe

Abstract

The application discloses a multifunctional continuous injector, which is provided with a protective sleeve retracting towards a needle cylinder part at an injection needle, and the needle cylinder part is provided with a guide locking mechanism; the protective sleeve is slidably connected in the guide locking mechanism, and the guide locking mechanism is connected with an injector base in a quick release mode; the injector base is further provided with a trigger mechanism, which comprises a trigger end, a linkage part and an action end; the protective sleeve serves as the trigger end, the retracting movement of which serves as a trigger action, and drives the linkage part to release the locking of the action end; and the action end is a push handle. In the application, the retracting movement of the protective sleeve forms protection for the injection needle, avoiding the situation of accidental injury; and the retracting movement of the protective sleeve is linked with the trigger mechanism to form locking for injection, avoiding the situation of medicine waste. In the application, the control of the injection dose is more convenient and rapid, compared with the screw adjustment in the prior art, and the quantitative control is more accurate, so that the dose can be rapidly changed when a large amount of injection work is performed.

Description

Technical Field

[0001] This invention relates to the field of continuous syringe technology, specifically to a multifunctional continuous syringe. Background Technology

[0002] Nowadays, my country's livestock industry is developing rapidly, and veterinary syringes are also widely used. When preventing diseases or injecting livestock and poultry, due to the large number of livestock and poultry raised, veterinarians must prepare medicine for each animal repeatedly. After each injection, medicine must be prepared again or drawn from the prepared medicine bottle, which is a lot of work. Therefore, most of them use reusable syringes, but the syringe needles lack effective protection.

[0003] For example, patent document 1, application number CN201320667911.0, discloses a veterinary continuous syringe, including a handle, a syringe barrel, a piston, an injection needle, and a cap. The injection needle is connected to the front end of the syringe barrel via a needle cap. The piston is placed inside the syringe barrel, and the piston rod is fixedly connected to the handle. The syringe barrel is connected to the front end of the handle via a nut. Most existing continuous syringes are similar to this technology, using exposed injection needles. Therefore, during high-intensity, continuous injection operations, veterinarians are very likely to accidentally prick themselves with the needle, causing injury.

[0004] To address this, Patent Document 2, Application No. CN202120181110.8, discloses a veterinary continuous syringe, comprising a handle, a drug delivery tube, a continuous drug supply component, and a stable drug delivery component. The handle is held by the veterinarian, the drug delivery tube is fixedly attached to the front end of the handle, the continuous drug supply component is connected above the drug delivery tube, and the stable drug delivery component is connected to the front end of the drug delivery tube. The continuous drug supply component includes a fixed connecting block, a connecting tube, a drug storage container, an observation window, graduations, a screw cap, and a vent. The stable drug delivery component includes a miniature pressure pump, a control button, a drug delivery head, a needle, a baffle, a placement ring, a pressure spring, and a fixing sleeve. In this technology, a fixing sleeve and spring are provided at the needle head. The fixing sleeve provides some protection to the outer periphery of the needle, but it lacks a locking function for the syringe. This means that the drug can be pushed out under any circumstances, resulting in drug waste. Furthermore, although the fixing sleeve has a certain amount of retraction, its backward movement is insufficient to complete the needle replacement operation, also leading to inconvenience in use.

[0005] Because veterinarians administer injections to livestock of varying sizes, the dosage needs to be constantly adjusted. For example, patent document 3 (application number CN201610065049.4) discloses an adjustable quantitative continuous injector, comprising: a syringe with graduations; a piston handle located at the rear port of the syringe to adjust the injection depth; a medicine container mounted above the syringe via a rotating base, allowing it to swing back and forth within the syringe, with a one-way valve at the rear; a liquid-conducting tubing, one end of which is sealed to the opening of the medicine container, and the other end of which is sealed to the syringe; and a fixing element for securing the medicine container to the rotating base to prevent movement. This invention makes the medicine container adjustable, ensuring that when the syringe is injected vertically, the medication is fully delivered into the syringe. Combined with the graduations on the syringe, this achieves rapid, precise, and continuous quantitative injection. It achieves a fixed dose injection by limiting the piston pusher stroke through the threaded engagement of the screw and nut. However, the rotation adjustment process of the threaded engagement takes a long time, which means that veterinarians will spend a lot of time repeatedly adjusting the dose.

[0006] In view of the above, it is necessary to propose a multifunctional continuous injector to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned technical problems by providing a multifunctional continuous injector.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a multifunctional continuous syringe, comprising a syringe base, a protective sleeve that retracts into the syringe barrel at the injection needle, and a guide locking mechanism that is fitted over the syringe barrel. The guide locking mechanism is used to guide the retraction of the protective sleeve and to lock and restrict the retraction of the protective sleeve. The protective sleeve is slidably placed inside the guide locking mechanism, and the guide locking mechanism is quickly detachably connected to the syringe base.

[0009] The syringe base is also provided with a triggering mechanism, which includes a trigger end, a chain part, and an actuating end. The protective sleeve serves as the trigger end, and its retraction movement serves as the triggering action, driving the chain part to release the lock on the actuating end. The actuating end is a push handle.

[0010] Furthermore, the syringe base also includes a gun body, a syringe barrel portion of the syringe base is installed at the front end of the gun body, a push handle passes through the gun body and extends out from the rear end of the gun body, and a grip is connected to the lower rear of the gun body for driving the push handle to move; the front end of the gun body and the syringe barrel portion are coaxially provided with a slot for connecting with a guide locking mechanism.

[0011] Furthermore, the guide locking mechanism includes an inner sleeve, an outer sleeve, and an anti-detachment ring. The outer sleeve is detachably rotatably connected to the outside of the inner sleeve. One end of the inner sleeve is connected to a slot, and the other end is slidably connected to a protective sleeve on the inner side. The outer sleeve and the inner sleeve rotate relative to each other to lock or unlock the protective sleeve. The outer wall of the protective sleeve is provided with an L-shaped convex rail. The L-shaped convex rail includes an axial rail parallel to the longitudinal axis and a circumferential rail arranged in the circumferential direction. The end of the axial rail is connected to the circumferential rail. The inner wall of the outer sleeve is provided with an inner protrusion that cooperates with the L-shaped convex rail.

[0012] The anti-detachment ring is used to prevent the protective sleeve and outer sleeve from coming out of the inner sleeve. The anti-detachment ring is fixedly connected to the inner sleeve. The outer circumference of the anti-detachment ring is provided with a stepped retaining ring for limiting the outer sleeve. The inner wall of the anti-detachment ring is provided with a guide notch that cooperates with the circumferential rail.

[0013] Furthermore, the trigger end includes a trigger rod connected to the end of the protective sleeve, and the inner bottom wall of the inner sleeve and the front wall of the gun body are provided with through holes for the trigger rod to pass through.

[0014] The interlocking part includes a swing component with a U-shaped structure. The swing component is equipped with a rotating shaft, a push rod, and a stop bar. The outer walls on both sides of the swing component are equipped with rotating shafts, and the inner walls are equipped with stop bars. The bottom of the U-shape of the swing component is equipped with a push rod, which is parallel to the rotating shaft. The two ends of the rotating shaft are rotatably connected to the inside of the gun body. A torsion spring is sleeved on the rotating shaft to drive the swing component back to the vertical plane. The trigger rod cooperates with the push rod to rotate the swing component and make the stop bar rotate from the vertical plane to the horizontal plane. The inner walls on both sides of the gun body are equipped with arc-shaped tracks with the rotating shaft as the center. The end of the push rod is placed in the arc-shaped track to limit the rotation amplitude of the swing component.

[0015] The actuating part includes stop blocks on both sides of the push handle. The stop blocks cooperate with the blocking bar. When the blocking bar is in a vertical plane, it blocks the side of the stop block near the syringe and limits the push handle. When the blocking bar rotates to a horizontal plane, the blocking bar is parallel to the upper side of the stop block, causing the stop block to lose its limiting position.

[0016] The front wall of the gun body is also provided with an injection hole for the push handle to pass through, and the side of the push handle is also provided with an anti-rotation side rib. The side of the injection hole is provided with a side opening to guide the anti-rotation side rib.

[0017] Furthermore, the rear wall of the gun body is provided with an injection dosage adjustment mechanism, which includes a dosage adjustment turntable, a rotating step, and a step locking block. The dosage adjustment turntable is rotatably connected to the rear wall of the gun body, and has an inner hole at its center for the push handle to pass through. The inner wall of the inner hole is provided with a rotating step, which is arranged around the push handle. The rotating step also includes notches at its first and last ends. A step locking block is fixedly provided on the side wall of the push handle. The step locking block cooperates with the rotating step to change the axial movement stroke of the push handle.

[0018] Furthermore, a continuous fluid replenishment structure is provided, which is used to continuously replenish the injected drug to the syringe during continuous injection. The end of the push handle is provided with a fluid supply port, and the push handle is provided with a central core hole along the axial direction that connects to the syringe. One end of the central core hole is connected to the fluid supply port, and the other end is connected to the syringe through the center of the piston. A one-way valve is provided inside the piston.

[0019] Furthermore, the guide locking mechanism is connected to the gun body through a rotation positioning structure, which includes a locking lug and an outer locking block. The outer locking block is provided on the outer side of the front end of the gun body, and the locking lug is fixed on the outer side of the end of the outer sleeve. The rotation of the outer sleeve rotates the outer locking block into the locking lug to achieve the fixation between the guide locking mechanism and the gun body.

[0020] Furthermore, the end of the protective sleeve is provided with a disinfectant cotton fixing ring, and the upper wall of the gun body is provided with a disinfectant water installation part. The disinfectant water installation part and the disinfectant cotton fixing ring are connected by a hose, and a regulating valve for controlling the flow rate of disinfectant water is provided below the disinfectant water installation part.

[0021] Furthermore, a viewing window is provided through the inner sleeve and outer sleeve, which is used to observe the inner syringe part.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. In this invention, the extension and retraction of the protective sleeve is used to protect the injection needle, thus avoiding accidental injury; and the extension and retraction of the protective sleeve is linked with the triggering mechanism to lock the injection, so that the medicine can only be ejected during injection, thus avoiding medicine waste.

[0024] 2. Disinfectant can be supplied to the disinfectant cotton at the front end through a flexible tube, and the supply of disinfectant can be controlled by a regulating valve, making it convenient to use.

[0025] 3. The present invention provides a more convenient and faster adjustment and control of the injection dosage. Compared with the existing technology, the thread adjustment is faster and the quantification is more accurate, which can adapt to the rapid change of dosage when a large number of injections are carried out.

[0026] 4. The internal syringe section can be viewed directly through the viewing window. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the syringe base of a multifunctional continuous syringe according to this application;

[0028] Figure 2 This is a schematic diagram of the internal structure of a multifunctional continuous injector according to this application;

[0029] Figure 3 This is a structural diagram showing the connection between the protective sleeve and the inner sleeve and outer sleeve in this application;

[0030] Figure 4 This is a schematic diagram of the structure between the trigger lever and the gun body in this application;

[0031] Figure 5 This is a structural diagram showing the swing component in this application positioned in a vertical plane.

[0032] Figure 6 This is a schematic diagram showing the position of the trigger rod pushing the swing component to rotate to a horizontal plane in this application;

[0033] Figure 7 This is a schematic diagram of the dose adjustment turntable in this application;

[0034] In the diagram: 1. Syringe base; 2. Syringe barrel; 3. Piston; 4. Push handle; 5. Grip; 6. Protective sleeve; 7. Gun body; 8. Slot; 9. Inner sleeve; 10. Outer sleeve; 11. Anti-dislodgement ring; 12. L-shaped convex rail; 13. Axial rail; 14. Circumferential rail; 15. Inner protrusion; 16. Stepped retaining ring; 17. Guide notch; 18. Trigger rod; 19. Through hole; 20. Swinging component; 21. Rotating shaft; 2. Push rod; 23. Barrier strip; 24. Torsion spring; 25. Arc track; 26. Stop block; 27. Side opening; 28. Dosage adjustment turntable; 29. ​​Rotating step; 30. Step block; 31. Notch position; 32. Liquid supply port; 33. Anti-rotation side rib; 34. Snap-fit ​​ear; 35. External locking block; 36. Disinfectant cotton fixing ring; 37. Disinfectant water installation part; 38. Hose; 39. Adjusting valve; 40. Viewing window. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] A multifunctional continuous injector, such as Figure 1As shown, the syringe includes a syringe base 1, which includes a syringe barrel 2 for holding the injected medication. An injection needle is mounted at the front end of the syringe barrel 2. A piston 3 for pushing the medication is located inside the syringe barrel 2. A push handle 4 is connected to the side of the piston 3 away from the injection needle. The push handle 4 is coaxially arranged with the syringe barrel 2. The syringe also includes a handle 5 for driving the push handle 4 to reciprocate. In actual use, the veterinarian holds the handle 5 to insert the injection needle into the animal's body, then squeezes the handle 5. The handle 5 drives the push handle 4 forward, thus pushing the medication out of the injection needle. A protective sleeve 6 is provided at the injection needle location, retracting into the syringe barrel 2. It is understood that when not injecting, the protective sleeve 6 completely covers the injection needle to form a protective layer and prevent accidental puncture. When injecting, the end of the protective sleeve 6 is pressed tightly, and the protective sleeve 6 is unlocked, allowing it to be compressed and moved to the syringe barrel 2, so that the injection needle is fully exposed for injection. The syringe barrel 2 is fitted with a guide locking mechanism, which is used to guide the retraction of the protective sleeve 6 and lock and restrict the retraction of the protective sleeve 6. The protective sleeve 6 and the guide locking mechanism are coaxially arranged, and the protective sleeve 6 is slidably connected and placed inside the guide locking mechanism. The guide locking mechanism is quickly connected to the syringe base 1.

[0037] like Figure 2 As shown, the syringe base 1 is also provided with a triggering mechanism, which includes a trigger end, a chain part, and an actuating end. The protective sleeve 6 serves as the trigger end, and its retraction movement serves as the triggering action, driving the chain part to release the lock on the actuating end. The actuating end is the push handle 4.

[0038] The syringe base 1 also includes a gun body 7. The syringe barrel 2 of the syringe base 1 is installed at the front end of the gun body 7. The push handle 4 passes through the gun body 7 and extends out from the rear end of the gun body 7. The grip 5 is connected to the lower rear of the gun body 7 to drive the push handle 4 to move. The front end of the gun body 7 is coaxially provided with the syringe barrel 2 and has a slot 8 for connecting with the guide locking mechanism.

[0039] like Figure 2 , 3 As shown, the guide locking mechanism includes an inner sleeve 9, an outer sleeve 10, and an anti-detachment ring 11. The outer sleeve 10 is detachably rotatably connected to the outside of the inner sleeve 9. One end of the inner sleeve 9 is connected to the slot 8, and the other end is slidably connected to the protective sleeve 6 on the inner side. The outer sleeve 10 and the inner sleeve 9 rotate relative to each other to lock or unlock the protective sleeve 6. The outer wall of the protective sleeve 6 is provided with an L-shaped convex rail 12. The L-shaped convex rail 12 includes an axial rail 13 parallel to the longitudinal axis and a circumferential rail 14 arranged circumferentially. The end of the axial rail 13 is connected to the circumferential rail 14. The inner wall of the outer sleeve 10 is provided with an inner protrusion 15 that cooperates with the L-shaped convex rail 12. In actual use, the inner protrusion 15 fits against the outer wall of the L-shaped convex rail 12. When the outer sleeve 10 rotates forward, the inner protrusion 15 faces the outer wall of the axial rail 13. Figure 3As shown in Figure A, the inner protrusion 15 is outside the range of the circumferential rail 14 and therefore will not be stuck. At this time, the protective sleeve 6 can freely extend and retract; when it retracts, the injection needle can be exposed for injection. Conversely, as shown in Figure A... Figure 3 As shown in Figure B, when the outer sleeve 10 is rotated in the opposite direction, causing the inner protrusion 15 to rotate into the range of the circumferential rail 14, the circumferential rail 14 will then block the outer side of the inner protrusion 15, thus preventing the protective sleeve 6 from retracting. Therefore, when the veterinarian does not need to perform injection work, the outer sleeve 10 should be rotated in the opposite direction so that the inner locking block is locked to protect the circumferential rail 14.

[0040] like Figure 3 As shown in Figure C, the anti-detachment ring 11 is used to prevent the protective sleeve 6 and the outer sleeve 10 from coming out of the inner sleeve 9. The anti-detachment ring 11 is fixedly connected to the inner sleeve 9. The outer periphery of the anti-detachment ring 11 is provided with a stepped retaining ring 16 for limiting the outer sleeve 10. The inner wall of the anti-detachment ring 11 is provided with a guide notch 17 that cooperates with the circumferential rail 14.

[0041] The trigger end includes a trigger rod 18 connected to the end of the protective sleeve 6, such as Figure 4 As shown, the inner bottom wall of the inner sleeve 9 and the front wall of the gun body 7 are provided with through holes 19 for the trigger rod 18 to pass through. It can be understood that the inner bottom wall of the inner sleeve 9 and the front wall of the gun body 7 are both provided with through holes 19. After the inner sleeve 9 and the gun body 7 are assembled, the two through holes 19 are in an overlapping state, so that the trigger rod 18 can be inserted into the gun body 7 to perform the triggering operation. The through hole 19 of the inner bottom wall of the inner sleeve 9 can pre-position the trigger rod 18, so that when the guide locking mechanism is installed on the gun body 7, the trigger rod 18 can be accurately inserted into the gun body 7.

[0042] The interlocking part includes a swing component 20, which has a U-shaped structure. The swing component 20 is equipped with a rotating shaft 21, a push rod 22, and a blocking bar 23. The rotating shaft 21 is located on both outer walls of the swing component 20, and the blocking bar 23 is located on the inner wall. The push rod 22 is located at the bottom of the U-shape of the swing component 20 and is parallel to the rotating shaft 21. The two ends of the rotating shaft 21 are rotatably connected to the gun body 7. A torsion spring 24 is sleeved on the rotating shaft 21 to drive the swing component 20 back to the vertical plane. The trigger rod 18 cooperates with the push rod 22 to rotate the swing component 20 and cause the blocking bar 23 to rotate from its vertical plane to a horizontal plane. During actual injection, the outer sleeve 10 is rotated to unlock the protective sleeve 6, and the protective sleeve 6 at the front end of the syringe is pushed towards the animal's skin. Under the reaction force, the protective sleeve 6 retracts and moves backward, allowing the injection needle to pierce the animal's skin. It is understood that... Figure 5 As shown in the image, this is the state before injection; at this time, the protective sleeve is retracted. Figure 6As shown in the figure, the gun head is pressed against the animal, causing the protective sleeve to retract. During this process, the protective sleeve 6 retracts, causing the trigger rod 18 to move backward and pass through the through hole 19 to insert into the gun body 7. The end of the trigger rod 18 pushes against the push rod 22, causing the swing component 20 to rotate from its original vertical plane to a horizontal plane, thus completing the change of the plane where the barrier bar 23 is located. The change in the plane position of the barrier bar 23 changes the locking or unlocking of the action end. The inner walls on both sides of the gun body 7 are provided with arc-shaped tracks 25 with the rotating shaft 21 as the center. The end of the push rod 22 is placed in the arc-shaped track 25 to limit the rotation amplitude of the swing component 20.

[0043] The actuating part includes stops 26 on both sides of the push handle 4. The stops 26 cooperate with the baffle bar 23. When the baffle bar 23 is in the vertical plane, it blocks the stop 26 on the side near the syringe 2 and limits the push handle 4. When the baffle bar 23 rotates to the horizontal plane, it is parallel to the upper side of the stop 26, causing the stop 26 to lose its limit. In actual use, when the swinging component 20 automatically returns to the vertical plane under the action of the torsion spring 24, the baffle bar 23 stops the stop 26. At this time, the handle 5 cannot push the push handle 4, thus avoiding the loss of medicine caused by accidental squeezing. When the injection operation is performed, the protective sleeve 6 retracts, and the swinging component 20 rotates, causing the baffle bar 23 to rotate into the horizontal position above the stop 26. At this time, the push handle 4 can be driven by the handle 5 to inject medicine.

[0044] The front wall of the gun body 7 is also provided with an injection hole through which the push handle 4 passes, such as Figure 4 As shown, the push handle 4 is also provided with an anti-rotation side rib 33, and the injection hole side is provided with a side opening 27 for guiding the anti-rotation side rib 33.

[0045] Furthermore, the rear wall of the gun body 7 is provided with an injection dosage adjustment mechanism. This mechanism includes a dosage adjustment turntable 28, a rotating step 29, and a step locking block 30. The dosage adjustment turntable 28 is rotatably connected to the rear wall of the gun body 7. Its center has an inner hole through which the push handle 4 passes. The inner wall of the inner hole has a rotating step 29 arranged around the push handle 4. The rotating step 29 also includes notches 31 at its beginning and end. The push handle 4 has a step locking block 30 fixedly mounted on its side wall. The step locking block 30 cooperates with the rotating step 29 to change the axial movement stroke of the push handle 4. Figure 2 , 7As shown, in actual use, rotating the dose adjustment dial 28 can cause the rotating step 29 to rotate around the push handle 4. The rotating step 29 has multiple steps, which correspond to different movement strokes of the push handle 4. When the notch 31 is aligned with the step block 30, the step block 30 will not limit the stroke of the push handle 4. At this time, the push handle 4 is at its maximum stroke and can push out all the medicine in the syringe 2. If it is necessary to precisely control the smaller dose of each injection, the steps of the step block 30 are aligned with the step block 30. When the lower step is aligned with the step block 30, the push handle 4 moves a longer stroke, corresponding to a larger dose of injection. Conversely, when the higher step is aligned with the step block 30, the stroke of the push handle 4 is shortened, and the injection dose is reduced.

[0046] Furthermore, a continuous fluid replenishment structure is provided, which is used to continuously replenish the injected medication to the syringe 2 during continuous injection. The push handle 4 has a supply port 32 at its tail and a central hole connected to the syringe 2 along its axial direction. One end of the central hole is connected to the supply port 32, and the other end is connected to the syringe 2 through the center of the piston 3. The piston 3 is equipped with a one-way valve, which controls the flow direction so that the medication enters the syringe 2 unidirectionally through the central hole. In use, the piston 3 is pushed to inject. When the push handle 4 pulls the piston 3 back, the one-way valve can be opened, so that external medication can be replenished into the syringe 2 for continuous injection.

[0047] Furthermore, the guide locking mechanism is connected to the gun body 7 via a rotational positioning structure, which includes a locking lug 34 and an outer locking block 35. The outer locking block 35 is located on the outer side of the front end of the gun body 7, and the locking lug 34 is fixedly located on the outer side of the end of the outer sleeve 10. Rotation of the outer sleeve 10 rotates the outer locking block 35 into the locking lug 34, thus fixing the guide locking mechanism to the gun body 7. In actual use, such as... Figure 1 , 7 As shown, the guide locking mechanism is disengaged from the gun body 7, which facilitates the replacement of the syringe 2 or the injection needle. After replacement, the inner sleeve 9 is inserted into the slot 8, and then the outer sleeve 10 is rotated so that the locking lug 34 is locked in the outer locking block 35. At the same time, the rotation of the outer sleeve 10 also releases its limiting lock on the protective sleeve 6, so that the injection operation can be performed. That is to say, the protective sleeve 6 can only be activated to move backward when the guide locking mechanism is securely connected to the gun body 7, which improves the safety of the device.

[0048] Furthermore, the end of the protective sleeve 6 is provided with a disinfectant cotton fixing ring 36, such as... Figure 2 As shown, a disinfectant installation part 37 is provided on the upper wall of the gun body 7. The disinfectant installation part 37 is connected to the disinfectant cotton fixing ring 36 through a hose 38. A regulating valve 39 for controlling the flow rate of disinfectant is provided below the disinfectant installation part 37.

[0049] Furthermore, such as Figure 5 As shown, a viewing window 40 is provided through the inner sleeve 9 and the outer sleeve 10. The viewing window 40 is used to observe the inner syringe part 2.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multifunctional continuous syringe, comprising a syringe base (1), characterized in that, The injection needle is provided with a protective sleeve (6) that retracts into the syringe barrel (2). The syringe barrel (2) is covered with a guide locking mechanism. The guide locking mechanism is used to guide the retraction of the protective sleeve (6) and lock and restrict the retraction of the protective sleeve (6). The protective sleeve (6) is slidably placed inside the guide locking mechanism. The guide locking mechanism is quickly connected to the syringe base (1). The syringe base (1) is also provided with a triggering mechanism, which includes a triggering end, a chain part, and an actuating end. The protective sleeve (6) serves as the triggering end, and its retraction movement serves as the triggering action, driving the chain part to release the lock on the actuating end. The actuating end is a push handle (4). The syringe base (1) also includes a gun body (7), and the syringe barrel (2) of the syringe base (1) is installed at the front end of the gun body (7); The trigger end includes a trigger rod (18) connected to the end of the protective sleeve (6), and the front wall of the gun body (7) is provided with a through hole (19) through which the trigger rod (18) passes. The interlocking part includes a swing component (20), which has a U-shaped structure. The swing component (20) is provided with a rotating shaft (21), a push rod (22), and a stop bar (23). The outer walls of both sides of the swing component (20) are provided with the rotating shaft (21), and the inner side wall is provided with the stop bar (23). The bottom of the U-shape of the swing component (20) is provided with the push rod (22), which is parallel to the rotating shaft (21). The two ends of the rotating shaft (21) are rotatably connected to the gun body (7). 21) A torsion spring (24) is fitted on the upper part to drive the swing component (20) back to the vertical plane. The trigger rod (18) cooperates with the push rod (22) to make the swing component (20) rotate and make the barrier bar (23) rotate from the vertical plane to the horizontal plane. The inner walls on both sides of the gun body (7) are provided with an arc track (25) with the rotating shaft (21) as the center. The end of the push rod (22) is placed in the arc track (25) to limit the rotation amplitude of the swing component (20). The push handle (4) is provided with stop blocks (26) on both sides. The stop blocks (26) cooperate with the blocking strip (23). When the blocking strip (23) is in the vertical plane, it blocks the stop block (26) on the side near the syringe part (2) and limits the push handle (4). When the blocking strip (23) rotates to the horizontal plane, the blocking strip (23) is parallel to the upper side of the stop block (26), so that the stop block (26) loses its limit.

2. The multifunctional continuous injector according to claim 1, characterized in that, The push handle (4) passes through the gun body (7) and extends out from the rear end of the gun body (7). The grip (5) is connected to the lower rear of the gun body (7) to drive the push handle (4) to move. The front end of the gun body (7) is coaxially provided with the syringe part (2) and the slot (8) for connecting with the guide locking mechanism.

3. A multifunctional continuous injector according to claim 2, characterized in that, The guide locking mechanism includes an inner sleeve (9), an outer sleeve (10), and an anti-detachment ring (11). The outer sleeve (10) is detachably rotatably connected to the outside of the inner sleeve (9). One end of the inner sleeve (9) is connected to the slot (8), and the other end is slidably connected to the protective sleeve (6) on the inner side. The outer sleeve (10) and the inner sleeve (9) rotate relative to each other to lock or unlock the protective sleeve (6). The outer wall of the protective sleeve (6) is provided with an L-shaped convex rail (12). The L-shaped convex rail (12) includes an axial rail (13) parallel to the longitudinal axis and a circumferential rail (14) arranged in the circumferential direction. The end of the axial rail (13) is connected to the circumferential rail (14). The inner wall of the outer sleeve (10) is provided with an inner protrusion (15) that cooperates with the L-shaped convex rail (12). The anti-detachment ring (11) is used to prevent the protective sleeve (6) and the outer sleeve (10) from coming out of the inner sleeve (9). The anti-detachment ring (11) is fixedly connected to the inner sleeve (9). The outer periphery of the anti-detachment ring (11) is provided with a stepped retaining ring (16) for limiting the outer sleeve (10). The inner wall of the anti-detachment ring (11) is provided with a guide notch (17) that cooperates with the circumferential rail (14).

4. A multifunctional continuous injector according to claim 3, characterized in that, The inner bottom wall of the inner sleeve (9) is provided with a through hole (19) for the trigger rod (18) to pass through; the front wall of the gun body (7) is also provided with an injection hole for the push handle (4) to pass through, and the side of the push handle (4) is also provided with an anti-rotation side rib (33), and the side of the injection hole is provided with a side opening (27) for guiding the anti-rotation side rib (33).

5. A multifunctional continuous injector according to claim 4, characterized in that, The rear wall of the gun body (7) is provided with an injection dose adjustment mechanism. The injection dose adjustment mechanism includes a dose adjustment turntable (28), a rotating step (29), and a step block (30). The dose adjustment turntable (28) is rotatably connected to the rear wall of the gun body (7). It has an inner hole at its center for the push handle (4) to pass through. The inner wall of the inner hole is provided with a rotating step (29). The rotating step (29) is arranged around the push handle (4). The rotating step (29) also includes notches (31) at its head and tail ends. The side wall of the push handle (4) is fixedly provided with a step block (30). The step block (30) cooperates with the rotating step (29) to change the axial movement stroke of the push handle (4).

6. A multifunctional continuous injector according to claim 2, characterized in that, It is also provided with a continuous fluid replenishment structure, which is used to continuously replenish the injection agent to the syringe (2) during continuous injection. The tail of the push handle (4) is provided with a fluid supply port (32). The push handle (4) is provided with a central core hole along the axial direction that connects to the syringe (2). One end of the central core hole is connected to the fluid supply port (32), and the other end is connected to the syringe (2) through the center of the piston (3). The piston (3) is provided with a one-way valve.

7. A multifunctional continuous injector according to claim 3, characterized in that, The guide locking mechanism is connected to the gun body (7) through a rotation positioning structure, which includes a locking lug (34) and an outer locking block (35). The outer locking block (35) is provided on the outer side of the front end of the gun body (7), and the locking lug (34) is fixedly provided on the outer side of the end of the outer sleeve (10). The rotation of the outer sleeve (10) will rotate the outer locking block (35) into the locking lug (34) to achieve the fixation between the guide locking mechanism and the gun body (7).

8. A multifunctional continuous injector according to claim 2, characterized in that, The protective sleeve (6) has a disinfectant cotton fixing ring (36) at its end, and a disinfectant water installation part (37) is provided on the upper wall of the gun body (7). The disinfectant water installation part (37) and the disinfectant cotton fixing ring (36) are connected by a hose (38). A regulating valve (39) for controlling the flow rate of disinfectant water is provided below the disinfectant water installation part (37).

9. A multifunctional continuous injector according to claim 3, characterized in that, A viewing window (40) is provided through the inner sleeve (9) and the outer sleeve (10), and the viewing window (40) is used to observe the inner syringe part (2).

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