Portable first-aid blood transfusion device

Abstract

The invention relates to the technical field of blood transfusion devices, and discloses a portable first-aid blood transfusion device which comprises a handle sleeve, a machine body is fixedly mounted outside the top of the handle sleeve, a mounting sleeve is fixedly connected to one end of the machine body, a trigger is rotatably connected to one end of the machine body, and a first spring is fixedly connected to the top of the trigger. According to the portable first-aid blood transfusion device, the rotation radius of the first connecting rod and the rotation radius of the second connecting rod are decreased or increased, it means that the movement range of the driving rod and the extension rod is decreased, and therefore when the trigger is manually pressed once, the operation is convenient, and the operation efficiency is greatly improved. The movement amount of the push rod changes along with the movement radius of the first connecting rod and the second connecting rod, so that the movement amount of the push rod can be accurately controlled by rotating the lead screw, the accurate liquid feeding amount is improved, the liquid feeding speed can be effectively controlled, and the discomfort of the body of a patient in a short time is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of blood transfusion devices, in particular to a portable emergency blood transfusion device. Background Art

[0002] The traditional blood transfusion device is an infusion device that establishes a pathway between blood and veins, and is composed of a bottle insertion needle, an air inlet needle or air inlet hole (optional, containing an air filter), a needle cap, a Y-type three-way pipeline (optional, the hose on the pipeline also has a stop clamp), a dropper (the dropper contains a blood filter), a pipeline, a drug addition port (optional), a flow regulator, an injection piece (optional), and an intravenous needle or injection needle above No. 7 (22G) (optional). However, the traditional blood transfusion device has certain disadvantages. For example, it cannot be used immediately during emergency treatment and requires the assistance of multiple medical staff. In addition, the infusion bottle needs to rely on the potential energy of gravity to make the blood flow out, which is very troublesome to operate. In order to solve this problem, the existing technology connects the infusion bottle to the drug pushing gun with a pipeline by giving pressure to push the liquid. A piston-type syringe is installed inside the drug pushing gun. When a person presses the After pressing the trigger on the medicine-pushing gun, the syringe inside the medicine-pushing gun is controlled to infuse forward, and after releasing the trigger of the medicine-pushing gun, the syringe piston automatically resets, and then the operation is repeated to inject the blood in the infusion bottle into the patient's body. Although the infusion can be performed quickly and it is portable enough, the medicine-pushing and gun-returning of the medicine-pushing gun share a common channel, and the recoil spring is directly reset when the human hand leaves the trigger, resulting in the difficulty in controlling the medicine-pushing and gun-returning speeds. In addition, if the blood-pushing speed is too fast, the patient's body will reject it for a short time, causing discomfort to the human body. The person needs to hold the medicine-pushing gun and keep his finger on the trigger without releasing it. Pushing blood for a long time can easily cause hand soreness, and it is also easy for the blood that has been transfused to flow back again. Since blood is viscous, the amount of blood flowing back from the blood vessels is relatively small compared to the amount of blood transfused, so it still has defects. For this reason, we propose a portable emergency blood transfusion device. Summary of the invention

[0003] The object of the present invention is to provide a portable emergency blood transfusion device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable emergency blood transfusion device, comprising a handle, the top of the handle is fixedly mounted on a body, one end of the body is fixedly connected to a mounting cover, one end of the body is rotatably connected to a trigger, the top of the trigger is fixedly connected to a first spring, and the trigger is arranged adjacent to the mounting cover, a push rod is slidably connected between the body and the mounting cover, the first spring sleeve is arranged on the push rod, the top of the push rod is fixedly connected to a first rack, the top of the body is rotatably connected to a turntable, a connecting rope is fixedly connected between the top of the trigger and the turntable, the inner ring of the turntable is fixedly connected to a central shaft, one end of the central shaft is rotatably connected to the body, and the bottom of the body is fixedly connected to the central shaft. The gear wheel is connected with the gear train of the first transmission gear and the gear train is connected with the gear of the first gear to the transmission gear of the first gear.

[0005] Preferably, the installation sleeve is detachably connected to a connecting nozzle at one end away from the fuselage, a liquid inlet pipe is fixedly connected to one side of the connecting nozzle, and a liquid outlet pipe is fixedly connected to the other side of the connecting nozzle.

[0006] Preferably, one end of the push rod is fixedly connected to a threaded column, a fixed mouthpiece is threadedly connected to the threaded column, a connecting seat is sleeved on the push rod, and a jaw cover is fixedly connected to the bottom of one end of the connecting seat.

[0007] Preferably, a pair of sliding rods are fixedly connected to one side of the fuselage, and both of the sliding rods are slidably connected to the propulsion block.

[0008] Preferably, the other side of the first connecting rod is fixedly connected to a mounting pin, and the mounting pin and the other end of the curved rotating rod are rotatably connected to a screw rod.

[0009] Preferably, a first fixing plate is fixedly installed on one side of the fuselage near the belt, a torsion spring is fixedly connected between the first fixing plate and the turntable, and the torsion spring is sleeved on the central shaft.

[0010] Preferably, the other end of the push rod is fixedly connected to a rear rod, one end of the rear rod extends in the direction of the threaded column, and a second fixing plate is fixedly installed on the top of the handle cover, the second fixing plate and the rear rod are slidably connected, a recoil spring is sleeved on the rear rod, a positioning rod is fixedly connected to the inside of the fuselage near the outer ring of the push rod, a key on the positioning rod is connected to a limiting ratchet, one side of the limiting ratchet is fixedly connected to a reset disk, the reset disk is located on the surface of the fuselage and slides, a ratchet bar is fixedly installed on the bottom of the rear rod, the ratchet bar and the limiting ratchet are meshed together, a gasket is fixedly installed on the middle of the positioning rod, and a second spring is connected and installed between the limiting ratchet and the gasket.

[0011] Preferably, a support plate is fixedly installed on the top of the handle cover, a limit plate is fixedly connected to the top of the support plate, the connecting rope passes through the limit plate and the support plate to slide, and one end of each slide rod is fixedly connected to the support plate.

[0012] Preferably, a closing cover is hinged on the top of the installation sleeve, the installation sleeve is made of transparent plastic, and a plurality of grooves for accommodating the outer edge of the syringe are provided inside the installation sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, when a patient needs a quantitative blood transfusion during a blood transfusion, the rear shell of the body can be opened manually, and then the screw rod can be rotated. During the rotation of the screw rod, the distance between the first connecting rod and the second connecting rod can be increased or decreased, thereby changing the rotation range of the first connecting rod. The rotation radius of the first connecting rod and the second connecting rod is reduced or increased, which means that the activity range of the driving rod and the extension rod is reduced. Therefore, each time the trigger is pressed manually, the movement amount of the push rod follows the change of the activity radius of the first connecting rod and the second connecting rod, so that the movement amount of the push rod can be accurately controlled by rotating the screw rod, the accurate amount of liquid administration is improved, and the speed of liquid administration can be effectively controlled, thereby reducing the short-term discomfort of the patient's body. When the reset disk is pulled outward, one side of the reset disk pulls the limit ratchet and the ratchet bar to separate, and the second spring is in a stretched state, so that the recoil spring pushes the rear rod to reset, so that the push rod is reset, so that the syringe piston rod between the fixed mouthpiece and the jaw cover on the push rod is reset, and in the process of its reset, the blood inside the blood bag is sucked into the syringe for use in the next round, and the limit ratchet and the ratchet bar are in a meshing state when the push rod moves forward, which means that even if the trigger is manually released, the push rod will not reset. Therefore, after each trigger is pressed, the amount of blood pumped is the same, and there is no need to manually hold the trigger for a long time. While the blood transfusion volume is guaranteed, the operator's experience is improved, and the device has certain practical functions; When the connecting rope passes through the limit plate and the support plate, the connecting rope can be made more stable, thereby preventing the connecting rope from swinging randomly inside the fuselage when the device is in use, which can easily cause fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the push rod and fixed mouthpiece structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the fuselage of the present invention; Figure 4 This is a schematic diagram of the structure of the connecting nozzle of the present invention; Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 6 It is a schematic diagram of the structure of the present invention for driving a push rod; Figure 7 For the present invention Figure 3 Another perspective structural diagram of ; Figure 8 It is a schematic diagram of the structure of the present invention for driving the push rod to reset; Fig. 9 This is a schematic diagram of the structure of the propulsion block of the present invention.

[0015] In the figure: 1-handle; 2-body; 3-installation sleeve; 4-connecting mouthpiece; 401-liquid inlet pipe; 402-liquid outlet pipe; 5-trigger; 6-reset plate; 7-fixed mouthpiece; 8-push rod; 9-first rack; 10-threaded column; 11-connecting seat; 12-jaw cover; 13-first spring; 14-limiting plate; 15-support plate; 16-connecting rope; 17-sliding rod; 18-propelling block; 19-connecting rod handle; 20-first connecting rod ; 21-mounting pin; 22-screw rod; 23-second connecting rod; 24-turntable; 2401-center shaft; 25-torsion spring; 26-curved turning rod; 27-connecting plate; 28-belt; 29-first fixed plate; 30-driving rod; 31-extension rod; 32-second fixed plate; 33-rear rod; 34-return spring; 35-second spring; 36-positioning rod; 37-limiting ratchet; 38-ratchet; 39-second rack. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0017] See also Figure 1-9 The present invention provides a technical solution: a portable emergency blood transfusion device, comprising a handle 1, a body 2 is fixedly installed on the top of the handle 1, a mounting sleeve 3 is fixedly connected to one end of the body 2, a trigger 5 is rotatably connected to one end of the body 2, a first spring 13 is fixedly connected to the top of the trigger 5, and the trigger 5 is arranged adjacent to the mounting sleeve 3, a push rod 8 is slidably connected between the body 2 and the mounting sleeve 3, the first spring 13 is sleeved on the push rod 8, a first rack 9 is fixedly connected to the top of the push rod 8, and the top of the body 2 is rotatably connected to the first spring 13. There is a turntable 24, a connecting rope 16 is fixedly connected between the top of the trigger 5 and the turntable 24, a central shaft 2401 is fixedly connected to the inner ring of the turntable 24, one end of the central shaft 2401 is rotatably connected to the fuselage 2, a curved turning rod 26 is rotatably connected to the bottom of the fuselage 2, a connecting disk 27 is fixedly connected to the curved turning rod 26 and the central shaft 2401, a belt 28 is sleeved between the two connecting disks 27, the other end of the curved turning rod 26 is sleeved with a second connecting rod 23, and the second connecting rod 23 is rotatably connected to the end away from the curved turning rod 26 A first connecting rod 20 is connected, one end of the first connecting rod 20 is fixedly connected to a connecting rod handle 19, one side of the connecting rod handle 19 is fixedly connected to a driving rod 30, one end of the driving rod 30 is rotatably connected to an extension rod 31, one end of the extension rod 31 is rotatably connected to a propulsion block 18, a redundant space is provided at the top of the propulsion block 18, a second rack 39 is swung and connected inside the redundant space, and the propulsion block 18 is rotated in the redundant space and intermittently meshed with the first rack 9 through one end of the second rack 39; the mounting sleeve 3 is away from the fuselage 2 A connecting nozzle 4 is detachably connected to one end, a liquid inlet pipe 401 is fixedly connected to one side of the connecting nozzle 4, and a liquid outlet pipe 402 is fixedly connected to the other side of the connecting nozzle 4; a threaded column 10 is fixedly connected to one end of the push rod 8, a fixed mouthpiece 7 is threadedly connected to the threaded column 10, a connecting seat 11 is sleeved on the push rod 8, and a jaw cover 12 is fixedly connected to the bottom of one end of the connecting seat 11; a closing cover is hinged on the top of the mounting sleeve 3, the mounting sleeve 3 is made of transparent plastic, and a plurality of grooves are provided inside the mounting sleeve 3 for placing the outer edge of the syringe.

[0018] First, the installation sleeve 3 is opened manually, the liquid outlet head of the syringe is placed on the connecting nozzle 4, and the end of the syringe is placed between the fixed mouthpiece 7 and the jaw cover 12, and then the fixed mouthpiece 7 is rotated on the threaded column 10 to move the fixed mouthpiece 7 toward the piston rod of the syringe. When the fixed mouthpiece 7 contacts the piston rod, the rotation of the fixed mouthpiece 7 is stopped, and then the blood bag is manually taken to connect the liquid inlet pipe 401 and the blood bag, wherein the liquid outlet pipe 402 is connected to the needle. After the liquid inlet pipe 401 and the blood bag are connected, the air between the blood bag and the liquid inlet pipe 401 and the liquid outlet pipe 402 is first discharged, wherein the liquid outlet pipe 402 and the liquid inlet pipe 401 are both installed with a one-way valve (not shown), so that the blood squeezed by the syringe can be During the process of liquid extraction, the blood in the liquid outlet tube 402 cannot flow into the liquid inlet tube 401, and the one-way valve passage direction on the liquid outlet tube 402 is opposite to it, preventing the internal blood of the human body from flowing back during the process of the syringe draining the blood inside the blood bag through the liquid inlet tube 401. Then the needle pierces the vein, and the trigger 5 is continuously pressed manually to compress the first spring 13 pounds. At the same time, when the trigger 5 is pressed, the top of the trigger 5 pulls the connecting rope 16 downward, and one end of the connecting rope 16 moves toward the gun head under the action of tension, and the connecting rope 16 slides on the limiting plate 14 and the supporting plate. At the same time, the other end of the connecting rope 16 is fixedly connected to the rotating disk 24, so that the connecting rope 16 drives the rotating disk 24 to rotate during the movement. When the turntable 24 rotates, the highest connecting disk 27 rotates. Since the two connecting disks 27 are connected by a belt 28, the lowest connecting disk 27 is also in the process of rotating. When the lowest connecting disk 27 rotates, the curved rotating rod 26 rotates. During the rotation of the curved rotating rod 26, the second connecting rod 23 drives the first connecting rod 20 to rotate on the axis of the curved rotating rod 26. When the curved rotating rod 26 rotates, the driving rod 30 rotates thereon. Since the second connecting rod 23 and the first connecting rod 20 are connected by the screw rod 22, they rotate around the curved rotating rod 26 all the time. When the connecting rod handle 19 rotates with the first connecting rod 20, the connecting rod handle 19 is located at the second connecting rod 23. The connecting rod 20 rotates on itself, and can also make the driving rod 30 move forward and backward. One end of the driving rod 30 swings with the connecting rod handle 19. Since the pushing block 18 and the sliding rod 17 are in a connected state, the driving rod 30 can drive the extension rod 31 to move forward and backward, thereby making the pushing block 18 slide on the sliding rod 17. When the pushing block 18 moves toward the supporting plate 15, the second rack 39 and the first rack 9 located at the top of the pushing block 18 are in a meshing state, so that the pushing block 18 can push the push rod 8 forward through the second rack 39, so that the syringe piston rod located between the fixed mouthpiece 7 and the jaw cover 12 moves forward, thereby causing the blood inside the syringe to be input into the human body. It is worth mentioning that when the extension rod 31 controls the second rack 39 to move backward, the second rack 39 can move with the top of the first rack 9 through the redundant space at the top of the push block 18, and there is a slippage phenomenon between the second rack 39 and the first rack 9, rather than a meshing state. Therefore, the second rack 39 can only push the first rack 9 forward to provide power for the syringe piston rod.

[0019] A first fixing plate 29 is fixedly installed on one side of the body 2 near the belt 28 , and a torsion spring 25 is fixedly connected between the first fixing plate 29 and the turntable 24 , and the torsion spring 25 is sleeved on the middle shaft 2401 .

[0020] When the trigger 5 is released by the person, the trigger 5 is reset by the first spring 13, allowing the connecting rope 16 to reset. When the connecting rope 16 is reset, the turntable 24 is reversed by the torsion spring 25, so that the connecting rope 16 is in a taut state between the trigger 5 and the turntable 24, so that when the trigger 5 is pressed next time, the connecting rope 16 can also drive the turntable 24 to rotate, and the two connecting disks 27 connected by the belt 28 are reversed. In this repetitive process, the second rack 39 can push the first rack 9 to move again.

[0021] Due to the length limitation of the push rod 8, the middle part of the driving rod 30 is hollowed out to facilitate the passage of the push rod 8 and prevent the two from interfering with each other.

[0022] Furthermore, a pair of slide rods 17 are fixedly connected to one side of the fuselage 2, and both of the slide rods 17 are slidably connected to the propulsion block 18; a mounting pin 21 is fixedly connected to the other side of the first connecting rod 20, and a screw rod 22 is rotatably connected to the other end of the mounting pin 21 and the curved rotating rod 26.

[0023] When a patient needs a quantitative blood transfusion during a blood transfusion, the rear shell of the body 2 can be opened manually, and then the screw rod 22 can be rotated. During the rotation of the screw rod 22, the distance between the first connecting rod 20 and the second connecting rod 23 can be increased or decreased, thereby changing the rotation range of the first connecting rod 20. The rotation radius of the first connecting rod 20 and the second connecting rod 23 is reduced or increased, which means that the activity range of the drive rod 30 and the extension rod is reduced. Therefore, each time the trigger 5 is pressed manually, the movement of the push rod 8 follows the change in the activity radius of the first connecting rod 20 and the second connecting rod 23, so that the movement of the push rod 8 can be accurately controlled by rotating the screw rod 22, thereby improving the accurate amount of liquid administration, and effectively controlling the speed of liquid administration, thereby reducing the short-term discomfort of the patient's body.

[0024] Furthermore, the other end of the push rod 8 is fixedly connected to a rear rod 33, one end of the rear rod 33 extends toward the direction of the threaded column 10, and a second fixing plate 32 is fixedly installed on the top of the handle 1, the second fixing plate 32 and the rear rod 33 are slidably connected, a recoil spring 34 is sleeved on the rear rod 33, a positioning rod 36 is fixedly connected to the inside of the fuselage 2 near the outer circle of the push rod 8, a key is connected to the positioning rod 36, a reset disk 6 is fixedly connected to one side of the limit ratchet 37, the reset disk 6 is located on the surface of the fuselage 2 and slides, a ratchet bar 38 is fixedly installed at the bottom of the rear rod 33, the ratchet bar 38 and the limit ratchet 37 are meshed together, a gasket is fixedly installed in the middle of the positioning rod 36, and a second spring 35 is connected and installed between the limit ratchet 37 and the gasket.

[0025] When the push rod 8 moves forward, one end of the piston rod of the syringe hits the bottom of the syringe. At this time, the reset disk 6 can be manually pulled out of the body 2. During the process of pulling the reset disk 6 outward, one side of the reset disk 6 pulls the limit ratchet 37 and the ratchet bar 38 to separate, and the second spring 35 is in a stretched state, so that the return spring 34 pushes the rear rod 33 to reset, allowing the push rod 8 to reset, thereby allowing the syringe piston rod between the fixed mouthpiece 7 and the jaw cover 12 on the push rod 8 to reset, and during its reset process, the blood inside the blood bag is sucked into the syringe for use in the next round, and the limit ratchet 37 and the ratchet bar 38 are in a meshing state during the process of the push rod 8 moving forward, which means that even if the trigger 5 is manually released, the push rod 8 will not reset. Therefore, after each pressing of the trigger 5, the amount of blood pushed is the same, and there is no need to manually hold the trigger 5 for a long time. While the blood transfusion amount is guaranteed, the operator's experience is improved, and the device has certain practical functions.

[0026] Furthermore, a support plate 15 is fixedly installed on the top of the handle cover 1, and a limiting plate 14 is fixedly connected to the top of the support plate 15. The connecting rope 16 slides through the limiting plate 14 and the support plate 15. One end of each slide rod 17 is fixedly connected to the support plate 15. When the connecting rope 16 passes through the limiting plate 14 and the support plate 15, the connecting rope 16 can be more stable, preventing the connecting rope 16 from shaking randomly inside the fuselage 2 when the device is in use, thereby easily causing fatigue.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable emergency blood transfusion device, comprising a handle (1), wherein the top of the handle (1) is fixedly mounted on a body (2), and wherein: One end of the fuselage (2) is fixedly connected to a mounting sleeve (3), one end of the fuselage (2) is rotatably connected to a trigger (5), the top of the trigger (5) is fixedly connected to a first spring (13), and the trigger (5) is arranged adjacent to the mounting sleeve (3), a push rod (8) is slidably connected between the fuselage (2) and the mounting sleeve (3), the first spring (13) is sleeved on the push rod (8), the top of the push rod (8) is fixedly connected to a first rack (9), the top of the fuselage (2) is rotatably connected to a turntable (24), a connecting rope (16) is fixedly connected between the top of the trigger (5) and the turntable (24), the inner ring of the turntable (24) is fixedly connected to a center shaft (2401), one end of the center shaft (2401) is rotatably connected to the fuselage (2), the bottom of the fuselage (2) is rotatably connected to a curved rotating rod (26), the curved rotating rod (26) and the center shaft (2 401) are fixedly connected to a connecting disk (27), a belt (28) is sleeved between the two connecting disks (27), the other end of the curved rotating rod (26) is sleeved with a second connecting rod (23), the end of the second connecting rod (23) away from the curved rotating rod (26) is rotatably connected to the first connecting rod (20), one end of the first connecting rod (20) is fixedly connected to a connecting rod handle (19), one side of the connecting rod handle (19) is fixedly connected to a driving rod (30), one end of the driving rod (30) is rotatably connected to an extension rod (31), one end of the extension rod (31) is rotatably connected to a propulsion block (18), a redundant space is opened at the top of the propulsion block (18), a second rack (39) is swung inside the redundant space, and the propulsion block (18) is intermittently meshed with the first rack (9) by rotating in the redundant space through one end of the second rack (39).

2. A portable emergency blood transfusion device according to claim 1, characterized in that: The end of the mounting sleeve (3) away from the body (2) is detachably connected to a connecting nozzle (4), one side of the connecting nozzle (4) is fixedly connected to a liquid inlet pipe (401), and the other side of the connecting nozzle (4) is fixedly connected to a liquid outlet pipe (402).

3. A portable emergency blood transfusion device according to claim 1, characterized in that: One end of the push rod (8) is fixedly connected to a threaded column (10), a fixed mouthpiece (7) is threadedly connected to the threaded column (10), a connecting seat (11) is sleeved on the push rod (8), and a jaw cover (12) is fixedly connected to the bottom of one end of the connecting seat (11).

4. A portable emergency blood transfusion device according to claim 1, characterized in that: A pair of sliding rods (17) are fixedly connected to one side of the fuselage (2), and both sliding rods (17) are slidably connected to the propulsion block (18).

5. A portable emergency blood transfusion device according to claim 4, characterized in that: The other side of the first connecting rod (20) is fixedly connected to a mounting pin (21), and the other end of the mounting pin (21) and the curved rotating rod (26) is rotatably connected to a screw rod (22).

6. A portable emergency blood transfusion device according to claim 4, characterized in that: A first fixing plate (29) is fixedly installed on one side of the body (2) near the belt (28), a torsion spring (25) is fixedly connected between the first fixing plate (29) and the turntable (24), and the torsion spring (25) is sleeved on the center shaft (2401).

7. A portable emergency blood transfusion device according to claim 1, characterized in that: The other end of the push rod (8) is fixedly connected to a rear rod (33), one end of the rear rod (33) extends in the direction of the threaded column (10), and a second fixing plate (32) is fixedly installed on the top of the handle (1), the second fixing plate (32) and the rear rod (33) are slidably connected, and a recoil spring (34) is sleeved on the rear rod (33). A positioning rod (36) is fixedly connected to the inside of the body (2) near the outer ring of the push rod (8), and the positioning rod The upper key (36) is connected to a limit ratchet (37), one side of the limit ratchet (37) is fixedly connected to a reset disk (6), the reset disk (6) is located on the surface of the fuselage (2) and slides, a ratchet bar (38) is fixedly installed at the bottom of the rear rod (33), the ratchet bar (38) and the limit ratchet (37) are meshed together, a gasket is fixedly installed in the middle of the positioning rod (36), and a second spring (35) is connected and installed between the limit ratchet (37) and the gasket.

8. A portable emergency blood transfusion device according to claim 4, characterized in that: A support plate (15) is fixedly mounted on the top of the handle cover (1), and a limit plate (14) is fixedly connected to the top of the support plate (15). The connecting rope (16) passes through the limit plate (14) and the support plate (15) to slide, and one end of each slide rod (17) is fixedly connected to the support plate (15).

9. The portable emergency blood transfusion device according to claim 1, characterized in that: The top of the installation sleeve (3) is hinged with a closing cover, the installation sleeve (3) is made of transparent plastic, and a plurality of grooves for accommodating the outer edge of the syringe are arranged inside the installation sleeve (3).

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