CN110812577B

CN110812577B - Automatic intravenous injection instrument

Info

Publication number: CN110812577B
Application number: CN201911101300.8A
Authority: CN
Inventors: 甘金强; 许皓; 梅震; 昌诗宇; 张俊仓; 赵腾
Original assignee: China University of Geosciences
Current assignee: China University of Geosciences
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2024-05-31
Anticipated expiration: 2039-11-12
Also published as: CN110812577A

Abstract

The invention discloses an automatic intravenous injection instrument, comprising: a housing; the tightening assembly is connected below the shell, is sleeved with an arm and a back of the hand and is tightened on the arm; a pretreatment assembly disposed within the housing for epidermis disinfection and vascular scanning; the injection assembly is arranged in the shell, and the position of the injection assembly is adjusted by adopting a four-degree-of-freedom platform, so that the injection assembly can be accurately pricked into a back blood vessel; the hemostatic assembly is connected to the inner top of the shell, and is arranged on the same side of the pretreatment assembly relative to the injection assembly and used for stopping bleeding of blood vessels after needle insertion is completed. The intravenous injection instrument provided by the invention has the beneficial effects of avoiding the limitation of manual operation technology and improving the convenience of injection.

Description

Automatic intravenous injection instrument

Technical Field

The invention relates to the field of precision instruments and equipment. More particularly, the present invention relates to a novel automatic intravenous injection apparatus.

Background

The existing intravenous injection is basically finished by manpower, and the whole intravenous injection process is not finished by a machine. The majority of the existing intravenous injection sites are on the back of the hand, and the main process is as follows: sucking the liquid medicine by using a syringe, exhausting air, and sleeving an ampoule; selecting a proper vein, detecting the direction and depth of the vein by a finger, padding a therapeutic towel or paper towel under a limb of a puncture part, fastening a tourniquet at a position about 6cm above the puncture part (near the heart end), disinfecting skin by using 2% iodine tincture, deiodizing by using 70% alcohol after the vein is dried, and ordering a patient to make a fist so as to make the vein full; during puncturing, the skin at the lower end of the vein is stretched by the thumb of the left hand to fix the skin, the right hand is used for holding the injector, the inclined surface of the needle head is upward, the needle head and the skin form an angle of 35 degrees, the skin is punctured from the upper part or the side of the vein, and then the skin is punctured in a submerged way along the direction of the vein; blood return is carried out, the needle head is confirmed to be in vein, a small amount of needle can be inserted into vein, tourniquet is loosened, the patient is ordered to loose fist, the needle head is fixed, and liquid medicine is slowly injected; after injection, the sterilizing cotton swab is used for pressing the puncture point, the needle head is quickly pulled out, and the patient is instructed to bend and press the elbow for a moment; cleaning the object. Due to the limitation of manual operation technology, intravenous injection can only be performed in specific environments such as hospitals, and convenience is lacking.

Disclosure of Invention

It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.

The invention also aims to provide a novel automatic intravenous injection instrument, the tightening component is sleeved with the arm and the back of the hand, and is tightened on the arm, so that vein blood vessels on the back of the hand are easy to find, the pretreatment component scans the blood vessels and disinfects the blood vessels, after the blood vessels are scanned, the injection component adopts a four-degree-of-freedom platform to adjust the position of the injection component, so that the injection component is accurately penetrated into the blood vessels on the back of the hand, and after the injection is completed, the injection component is pulled out, and the hemostatic component is used for hemostasis. The intravenous injection instrument provided by the invention avoids the limitation of manual operation technology and improves the convenience of injection.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a novel automatic intravenous injection apparatus comprising:

the shell is provided with a CPU and an LED screen, and the LED screen is connected with the CPU;

The tightening assembly is connected below the shell, is sleeved with an arm and a back of the hand and is tightened on the arm;

A pretreatment assembly disposed within the housing for epidermis disinfection and vascular scanning;

The injection assembly is arranged in the shell, and the position of the injection assembly is adjusted by adopting a four-degree-of-freedom platform, so that the injection assembly can be accurately pricked into a back blood vessel;

The hemostatic assembly is connected to the inner top of the shell, and is arranged on the same side of the pretreatment assembly relative to the injection assembly and used for stopping bleeding of blood vessels after needle insertion is completed;

The hemostatic assembly, the injection assembly, the pretreatment assembly and the tightening assembly are respectively connected with the CPU through wires, and an internal power supply of the shell provides electric energy for the hemostatic assembly, the injection assembly, the pretreatment assembly, the tightening assembly, the CPU and the LED screen.

Preferably, the tightening assembly comprises a tightening ring and a tightening arm connected to the tightening ring, a side opening and a front opening are formed in one side, away from the tightening ring, of the tightening arm, the side opening is used for a thumb to pass through, the front opening is used for other four fingers to pass through, after the tightening assembly is electrified, according to the LED screen lightening indication, the tightening ring contracts and extrudes the arm, and blood reflux in blood vessels is inhibited.

Preferably, the pretreatment component comprises an ultrasonic scanning mechanism and a disinfection mechanism, the ultrasonic scanning mechanism descends to be attached to the back of the hand, the blood vessel is scanned by moving back and forth, scanning information is transmitted to the cloud background, a needle insertion path is calculated, and the disinfection mechanism wipes and disinfects the needle insertion part.

Preferably, the ultrasonic scanning mechanism is arranged at the inner upper part of the shell and comprises a first cross column and a probe, the first cross column is arranged on a pair of cross bars at the inner top of the shell in a sliding manner, the first cross column drives the probe to stretch up and down according to instructions to complete vessel image acquisition, and the probe is made of soft capsule materials.

Preferably, the sterilizing mechanism is arranged at the inner lower part of the shell, and comprises a pair of sliding pairs and cotton sticks with two ends respectively fixed on the sliding pairs, wherein the sliding pairs are fixed in the shell in parallel, and the sliding pairs drive the cotton sticks to wipe the needle insertion part according to instructions.

Preferably, the injection assembly comprises a sliding guide rail arranged in the shell, a needle cylinder clamped in the sliding guide rail, a push head arranged at the rear end part of the needle cylinder, a clamping piece for clamping the needle cylinder, and a needle fixing part fixed on the four-degree-of-freedom platform.

Preferably, the four-degree-of-freedom platform is arranged at the inner bottom of the shell, the four-degree-of-freedom platform comprises a pair of first guide rails fixed at the bottom of the shell, a first platform sliding along the arrangement direction of the pair of first guide rails, a pair of second guide rails arranged inside the first platform and vertical to the pair of first guide rails, a second platform sliding along the arrangement direction of the pair of second guide rails, a third guide rail arranged on the second platform, and a flexible positioning platform arranged on the third guide rail, wherein the third guide rail is a saw-tooth guide rail, and the flexible positioning platform is meshed and connected with the third guide rail.

Preferably, the flexible positioning platform comprises a fixed platform, a flexible mechanism and a movable platform, wherein the fixed platform is connected with the third guide rail, the movable platform is nested in the fixed platform, and the fixed platform is connected with the movable platform through the flexible mechanism.

Preferably, the needle fixing part comprises a third platform clamped into the movable platform and a fixing rod connected to the third platform for fixing the needle, and a groove is arranged in the fixing rod for the needle to pass through and limit the needle.

Preferably, the hemostatic mechanism comprises a second cross column and a hemostatic pressure head, wherein the second cross column is slidably fixed on the pair of cross rods, and the hemostatic pressure head is controlled to extend downwards to stop bleeding according to the command expansion and contraction of the second cross column.

The invention at least comprises the following beneficial effects: the intelligent intravenous injection instrument designed by the invention provides the complete functions of identification and positioning and automatic needle insertion and transfusion, basically does not need manual operation, removes the limitation that the medical transfusion treatment can only be carried out in hospitals before, and can carry out transfusion treatment only by preparing relevant liquid medicine in places such as home, company and the like. On the one hand, for common cold fever patients, only a small hospital is needed to prepare the treatment liquid medicine, and the infusion treatment can be carried out on site or home, so that queuing registration of a large hospital is avoided, and time and labor are wasted and the disease treatment is influenced. For the patients needing hospitalization, the patients can also choose to go home to receive transfusion treatment after the liquid medicine is prepared, so that great hospitalization cost is avoided, and great convenience is provided. On the other hand, the crowding degree of patients can be relieved for the hospitals, whether the hospitals are big or primary hospitals, the workload of clinicians is greatly reduced, and the labor cost is saved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic view of an intravenous injection apparatus according to one embodiment of the present invention;

FIG. 2 is a schematic top view of an intravenous apparatus according to one embodiment of the present invention;

FIG. 3 is a schematic top view of the interior of an intravenous device according to one embodiment of the present invention;

FIG. 4 is a schematic view of a sterilizing mechanism according to one embodiment of the present invention;

FIG. 5 is a schematic view of a scanning structure of an ultrasonic scanning mechanism according to one embodiment of the present invention;

FIG. 6 is a schematic view of the distribution of the ultrasound scanning mechanism and hemostatic assembly according to one embodiment of the present invention;

FIG. 7 is a schematic view of an ultrasonic scanning mechanism according to one embodiment of the present invention;

FIG. 8 is a schematic structural view of a sterilizing mechanism according to one embodiment of the present invention;

fig. 9 is a schematic top view of a sterilizing mechanism according to one embodiment of the present invention;

FIG. 10 is a schematic view of an injection assembly according to one embodiment of the present invention;

FIG. 11 is a schematic view of the needle mounting structure according to one embodiment of the present invention;

FIG. 12 is a schematic view of a four-degree-of-freedom platform according to one embodiment of the present invention;

FIG. 13 is a schematic view of a large travel movement mechanism according to one embodiment of the present invention;

FIG. 14 is a schematic structural view of a flexible positioning platform according to one embodiment of the present invention;

FIG. 15 is a schematic view of a needle fixing portion according to one embodiment of the present invention;

FIG. 16 is a schematic view showing the structure of a fixing rod according to one embodiment of the present invention;

Figure 17 is a schematic view of a hemostatic assembly according to one embodiment of the present invention;

fig. 18 is a schematic view showing a structure of an opened casing of an intravenous injection apparatus according to one embodiment of the present invention.

Detailed Description

The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.

In the description of the present invention, the terms "upper," "lower," "front," "rear," "same," "vertical," "parallel," "top," "bottom," "inner," "outer," and the like are used for convenience in describing the present invention and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

As shown in fig. 1 to 18, the present invention provides a novel automatic intravenous injection apparatus, comprising:

the shell 1 is provided with a CPU and an LED screen 101, the LED screen 101 is connected with the CPU, the shell 1 is used for accommodating a tightening assembly 2, a preprocessing assembly 3, an injection assembly 4 and a hemostasis assembly 6, the injection assembly 4, the preprocessing assembly 3 and the tightening assembly 2 are respectively connected with the CPU through wires, and an internal power supply of the shell 1 is used for providing electric energy for the hemostasis assembly 6, the injection assembly 4, the preprocessing assembly 3, the tightening assembly 2, the CPU and the LED screen.

The tightening assembly 2 is connected below the shell 1, and the tightening assembly 2 is sleeved with an arm and a back of a hand and is tightened on the arm to enable components in the shell 1 to be attached to the back of the hand;

The tightening assembly 2 comprises a tightening ring 201 and a tightening arm connected to the tightening ring 201, a side opening 202 and a front opening 203 are formed in one side, away from the tightening ring 201, of the tightening arm, the side opening 202 is used for a thumb to pass through, the front opening 203 is used for other four fingers to pass through, after the tightening assembly is electrified, according to the lightening indication of the LED screen 101, the tightening ring 201 contracts and extrudes the arm, and blood backflow in blood vessels is restrained.

A pre-treatment assembly 3, provided within said housing 1, for epidermis disinfection and vascular scanning;

The pretreatment assembly 3 comprises an ultrasonic scanning mechanism 32 and a disinfection mechanism 31, wherein the ultrasonic scanning mechanism 32 descends to be attached to the back of a hand, moves back and forth to scan blood vessels, transmits scanning information to a cloud background, calculates a needle insertion path, and the disinfection mechanism 31 wipes and disinfects needle insertion parts;

The disinfection mechanism 31 is arranged at the inner lower part of the shell 1, the disinfection mechanism 31 comprises a pair of sliding pairs 311 and a cotton stick 312, both ends of which are respectively fixed on the pair of sliding pairs 311, the pair of sliding pairs 311 are fixed in the shell 1 in parallel, the pair of sliding pairs 311 drive the cotton stick 312 to wipe a needle insertion part according to instructions, and the cotton stick 312 is positioned at the inner bottom part of the shell 1;

The ultrasonic scanning mechanism 32 is arranged at the upper part in the shell 1, the ultrasonic scanning mechanism 32 comprises a first cross post 321 and a probe 322, the first cross post 321 is arranged on a pair of cross bars 102 at the inner top of the shell 1 in a sliding manner, the first cross post 321 drives the probe 322 to stretch out and draw back up and down according to instructions, blood vessel image acquisition is completed, the probe 322 is made of soft capsule materials, the first cross post 321 is of a cross structure of two rods, and the stretching and retracting of the first cross post 321 realizes the stretching and retracting function of the first cross post 321 by changing the relative position of the upper end of the first cross post 321.

The injection assembly 4 is arranged in the shell 1, and the position of the injection assembly 4 is adjusted by adopting the four-degree-of-freedom platform 5, so that the injection assembly 4 is accurately pricked into a hand back blood vessel;

The injection assembly 4 comprises a sliding guide rail 401 arranged in the shell 1, a needle cylinder 404 clamped in the sliding guide rail 401, a push head 402 arranged at the rear end part of the needle cylinder 404, a clamping piece 403 for clamping the front part of the needle cylinder 404, and a needle fixing part 405 fixed on the four-degree-of-freedom platform 5; the push head 402 moves along the sliding guide rail 401, and the push head 402 pushes out the liquid in the syringe 404 to inject the liquid into a blood vessel;

The four-degree-of-freedom platform 5 is arranged at the inner bottom of the shell 1, the four-degree-of-freedom platform 5 comprises a pair of first guide rails 501 fixed at the bottom of the shell 1, a first platform 502 sliding along the arrangement direction of the pair of first guide rails 501, a pair of second guide rails 503 arranged inside the first platform 502 and vertical to the pair of first guide rails 501, a second platform 504 sliding along the arrangement direction of the pair of second guide rails 503, a third guide rail 505 arranged on the second platform 504, and a flexible positioning platform 506 arranged on the third guide rail 505, wherein the third guide rail 505 is a serrated guide rail, the flexible positioning platform 506 is in meshed connection with the third guide rail 505, the first platform 502 slides along the pair of first guide rails 501, the second platform 504 slides along the direction of the second guide rails 503 vertical to the first guide rails 501, and the flexible positioning platform 506 slides along the arrangement direction of the third guide rails 501, and the pair of first guide rails 501, the first platform 502, the pair of second guide rails 503, the second platform 504 and the third guide rails 505 are combined into a large-stroke mechanism, as shown in fig. 13;

The flexible positioning platform 506 includes a fixed platform 5061, a compliant mechanism 5062, and a movable platform 5063, wherein the fixed platform 5061 is connected to the third guide rail 505, the movable platform 5063 is nested in the fixed platform 5061, the fixed platform 5061 is connected to the movable platform 5063 through the compliant mechanism 5062, and the compliant mechanism 5062 adjusts the position of the movable platform 5063;

the needle fixing part 405 comprises a third platform 4051 clamped into the movable platform 5063, and a fixing rod 4052 connected to the third platform 4051 for fixing the needle, wherein a groove is arranged in the fixing rod 4052 for the needle to pass through and limit the needle; after the injection is started, the needle is connected with the syringe 404 through a transfusion tube, and the transfusion tube passes through one side of the housing 1 near the four-degree-of-freedom platform 5 to fix the needle on the needle fixing part 405 on the four-degree-of-freedom platform 5.

A hemostatic assembly 6 attached to the top inside the housing 1, the hemostatic assembly 6 being disposed on the same side of the pre-treatment assembly 3 as the injection assembly 4;

The hemostatic assembly 6 comprises a second cross-pillar 601 and a hemostatic ram 602, the second cross-pillar 601 is slidably fixed on the pair of crossbars 102, and the hemostatic ram 602 is controlled to extend downwards to stop bleeding according to the command expansion and contraction of the second cross-pillar 601.

In the above technical scheme, the arm and the back of the hand are sleeved on the tightening component 2, the tightening component is tightened on the arm, so that vein blood vessels are easy to find, the pretreatment component 3 scans the blood vessels and disinfects the blood vessels, after the blood vessel scanning is completed, the injection component 4 adopts the four-degree-of-freedom platform 5 to adjust the position of the injection component 4, the injection component 4 is enabled to be accurately pricked into the arm blood vessels, after the injection is completed, the injection component 4 is pulled out, and the hemostasis component 6 is used for hemostasis. The novel automatic intravenous injection instrument provided by the invention avoids the limitation of manual operation technology and improves the convenience of injection.

The specific steps are as follows:

1. wearing instrument

In fig. 1, 1 is a tightening assembly 2, the tightening assembly 2 is made of stretchable cloth, arms and backs of different people can be well attached, a good fixing effect is achieved, the arms extend into the tightening assembly 2, thumbs extend out from a side opening 202, and other four fingers extend out from a front opening 203, so that the tightening assembly is similar to a glove wearing mode.

2. Tight arm

After the instrument is worn, the hidden switch in fig. 2 is pressed for 3 seconds, the intravenous injection instrument is started, the LED screen 101 is lightened, and the arm is fastened according to the prompt. The tightening ring 201 has the function of shrinking after being electrified, and before transfusion, the tightening ring 201 is electrified and tightened to achieve the effect of inhibiting blood backflow in blood vessels.

3. Skin disinfection

According to the prompt, the disinfecting mechanism 31 is adopted to select the epidermis for disinfecting, the sliding pair 311 in fig. 4 clamps the cotton stick 312 with disinfectant in the middle to slide back and forth on the back of the hand, and the epidermis of the intravenous injection site is disinfected and sterilized.

4. Ultrasonic scanning of blood vessels

After the epidermis is disinfected, the ultrasonic probe 322 in fig. 5 is moved back and forth to scan the blood vessel by descending to be attached to the back of the hand, and the scanned information is transmitted to the cloud background to be processed, so that tissue tomographic image information of the scanned position of the back of the hand is obtained, wherein the tissue tomographic image information comprises the position of the blood vessel, the thickness of the blood vessel and the blood flow area information, and finally, a needle insertion path is calculated and generated.

5. Infusion needle

After the vascular scanning operation is completed, the exhaust operation of the infusion tube is manually completed while the scanning result is analyzed and calculated in the background. As shown in fig. 11, the front panel of the housing 1 is sprung open, the infusion tube is fixed at a predetermined position to a clamp for controlling the flow rate, and the infusion needle is fixed to the internal needle fixing portion 405.

6. Begin to infuse

After the fixing of the infusion needle is completed, the infusion can be started. Pressing a start button on the LED screen 101, the instrument starts an automatic infusion operation. The power supply provides power to drive the four-degree-of-freedom platform 5 to move, the position is adjusted, and after the position is positioned, the needle insertion operation is started. After successful completion of needle insertion, infusion starts to end.

7. Hemostatic pressing for needle drawing

As shown in fig. 17, after the transfusion is completed, the hemostatic pressure head 602 descends while pulling out the needle, the back of the hand is lightly pressed to the needle site, then four corners of the hemostatic pressure head 602 move downwards, and a tourniquet is attached to complete the transfusion.

The interaction between the instrument and the patient is completed on the LED interaction screen, and the interaction comprises information prompt, operation selection and the like.

As shown in fig. 18, the intravenous injection apparatus can be turned over the housing 1 along one side for exchanging the epidermis sterilizing cotton stick 312 for

The lumen is inspected and cleaned.

All components controlled by the CPU are connected in parallel in circuit connection, are hung on a control bus according to the standard, enter the system and work under unified control of the CPU. The ultrasonic probe 322 and other sensors transmit signals to the CPU via the data bus, the CPU processes the data, and transmits execution signals to the tightening assembly 2, the pre-processing assembly 3, the injection assembly 4, the hemostatic assembly 6, and the like via the control bus to perform corresponding operations.

The invention has the following advantages:

1. Convenience and convenience

The intelligent intravenous injection instrument designed by the invention provides the complete functions of identification and positioning and automatic needle insertion and transfusion, basically does not need manual operation, removes the limitation that the medical transfusion treatment can only be carried out in hospitals before, and can carry out transfusion treatment only by preparing relevant liquid medicine in places such as home, company and the like. On the one hand, for common cold fever patients, only a small hospital is needed to prepare the treatment liquid medicine, and the infusion treatment can be carried out on site or home, so that queuing registration of a large hospital is avoided, and time and labor are wasted and the disease treatment is influenced. For the patients needing hospitalization, the patients can also choose to go home to receive transfusion treatment after the liquid medicine is prepared, so that great hospitalization cost is avoided, and great convenience is provided. On the other hand, the crowding degree of patients can be relieved for the hospitals, whether the hospitals are big or primary hospitals, the workload of clinicians is greatly reduced, and the labor cost is saved.

2. Safety and sanitation

The invention provides a relatively sealed space and provides a safe and sanitary environment for intravenous transfusion; in addition, the product is internally provided with an ultraviolet searchlight, and the inner space of the instrument is sterilized and disinfected by ultraviolet rays before each use. The whole use process of the product is basically finished automatically, and the traditional manual transfusion operation is completely replaced, so that unnecessary pain, adverse reaction and the like caused by patients due to errors possibly occurring in the manual operation process are eliminated.

3. Automation of

Besides the intellectualization and automation of the transfusion process, the invention is also provided with an LED screen to realize the interaction between the instrument and the person; the instrument can display a cheerful and interesting picture, so that the attention of a patient is dispersed, the pain experience caused by needle penetration is reduced, and boring infusion time can be provided, so that a good pleasant intelligent experience is provided for the patient in the infusion process. In addition, the product is provided with an emergency stop button, and if an accident happens, the instrument can be stopped emergently and the needle is withdrawn to be attached with a disinfection belt. In addition, a key for controlling the flow rate of the liquid is arranged, the current flow rate is displayed in real time, and the current flow rate is adjusted in time to prevent adverse reaction of a patient.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. An automatic intravenous injection apparatus, comprising:

a housing (1) provided with a CPU and an LED screen (101), the LED screen (101) being connected to the CPU;

the tightening assembly (2) is connected below the shell (1), and the tightening assembly (2) is sleeved with an arm and a back of the hand and can be tightened on the arm;

A pre-treatment assembly (3) disposed within the housing (1) for back of hand epidermis disinfection and vascular scanning;

the injection assembly (4) is arranged in the shell (1), and the position of the injection assembly (4) is adjusted by adopting the four-degree-of-freedom platform (5), so that the injection assembly (4) is accurately pricked into a back blood vessel;

The hemostatic assembly (6) is connected to the inner top of the shell (1), and the hemostatic assembly (6) and the pretreatment assembly (3) are arranged on the same side relative to the injection assembly (4) and are used for stopping bleeding of blood vessels after needle insertion is completed;

The hemostatic assembly (6), the injection assembly (4), the pretreatment assembly (3) and the tightening assembly (2) are respectively connected with the CPU through wires, and an internal power supply of the shell (1) provides electric energy for the hemostatic assembly (6), the injection assembly (4), the pretreatment assembly (3), the tightening assembly (2), the CPU and the LED screen (101);

the pretreatment assembly (3) comprises an ultrasonic scanning mechanism (32) and a disinfection mechanism (31), the ultrasonic scanning mechanism (32) descends to be attached to the back of the hand, the blood vessel is scanned by moving back and forth, scanning information is transmitted to a cloud background, a needle insertion path is calculated, and the disinfection mechanism (31) wipes and disinfects a needle insertion part;

The ultrasonic scanning mechanism (32) is arranged at the upper part in the shell (1), the ultrasonic scanning mechanism (32) comprises a first cross column (321) and a probe (322), the first cross column (321) is arranged on a pair of cross bars (102) at the inner top of the shell (1) in a sliding manner, the first cross column (321) drives the probe (322) to stretch up and down according to instructions, blood vessel image acquisition is completed, and the probe (322) is made of soft capsule materials;

the sterilizing mechanism (31) is arranged at the inner lower part of the shell (1), the sterilizing mechanism (31) comprises a pair of sliding pairs (311) and cotton sticks (312) with two ends fixed on the sliding pairs (311) respectively, the sliding pairs (311) are fixed in the shell (1) in parallel, and the sliding pairs (311) drive the cotton sticks (312) to wipe a needle inserting part according to instructions;

The injection assembly (4) comprises a sliding guide rail (401) arranged in the shell (1), a needle cylinder (404) clamped in the sliding guide rail (401), a push head (402) arranged at the rear end part of the needle cylinder (404), a clamping piece (403) for clamping the needle cylinder (404) and a needle fixing part (405) fixed on the four-degree-of-freedom platform (5);

The four-degree-of-freedom platform (5) is arranged at the inner bottom of the shell (1), the four-degree-of-freedom platform (5) comprises a pair of first guide rails (501) fixed at the bottom of the shell (1), a first platform (502) sliding along the arrangement direction of the pair of first guide rails (501), a pair of second guide rails (503) arranged inside the first platform (502) and perpendicular to the pair of first guide rails (501), a second platform (504) sliding along the arrangement direction of the pair of second guide rails (503), a third guide rail (505) arranged on the second platform (504) and a flexible positioning platform (506) arranged on the third guide rail (505), the third guide rail (505) is a saw-tooth guide rail, and the flexible positioning platform (506) is in meshed connection with the third guide rail (505);

The flexible positioning platform (506) comprises a fixed platform (5061), a flexible mechanism (5062) and a movable platform (5063), the fixed platform (5061) is connected with the third guide rail (505), the movable platform (5063) is nested in the fixed platform (5061), and the fixed platform (5061) is connected with the movable platform (5063) through the flexible mechanism (5062);

the needle fixing part (405) comprises a third platform (4051) clamped into the movable platform (5063) and a fixing rod (4052) connected to the third platform (4051) for fixing the needle, and a groove is formed in the fixing rod (4052) for the needle to pass through and limiting the needle.

2. The automatic intravenous injection apparatus according to claim 1, wherein the tightening assembly (2) comprises a tightening ring (201) and a tightening arm connected to the tightening ring (201), a side opening (202) and a front opening (203) are arranged on one side of the tightening arm, which is away from the tightening ring (201), the side opening (202) is used for allowing a thumb to pass through, the front opening (203) is used for allowing the rest four fingers to pass through, and after the tightening assembly is electrified, according to the lightening indication of the LED screen (101), the tightening ring (201) contracts and presses the arm to inhibit blood reflux in a blood vessel.

3. The automatic intravenous apparatus of claim 1, wherein the hemostatic assembly (6) comprises a second cross-bar (601) and a hemostatic ram (602), the second cross-bar (601) being slidably secured to a pair of cross-bars (102), the second cross-bar (601) being configured to control the hemostatic ram (602) to extend downwardly for hemostasis upon command.