CN110639097B

CN110639097B - Auxiliary device for medical injection

Info

Publication number: CN110639097B
Application number: CN201911109768.1A
Authority: CN
Inventors: 郑建建; 郭勇; 李纯雪
Original assignee: First Affiliated Hospital of Wenzhou Medical University
Current assignee: Zhejiang Medical Technology Co ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2022-05-06
Anticipated expiration: 2039-11-14
Also published as: CN110639097A

Abstract

The invention discloses an auxiliary device for medical injection, which comprises a mounting bottom plate, an L-shaped mounting seat and a hand pressing mechanism, wherein the L-shaped mounting seat comprises a base and a side plate, and the side plate is provided with a round hole; the pressing mechanism comprises a cylinder, one end of the cylinder penetrates through and is fixed in the round hole, a cylindrical air bag is arranged on the inner side wall of the cylinder, a first telescopic ring and a second telescopic ring are respectively arranged on two sides inside the cylindrical air bag, and a first spring is arranged between the first telescopic ring and the second telescopic ring; a connector penetrates through the cylinder and is communicated with the interior of the cylindrical air bag, the top end of the connector is connected with a pressing air bag through a pipeline, and the tail end of the pressing air bag is connected with a one-way air valve; the cylinder is also provided with an air release pipe, the air release pipe is communicated with the inside of the cylindrical air bag, and the top end of the air release pipe is in threaded connection with a sealing nut. The invention can keep the arm of the patient stable during injection and make the blood vessel of the patient clearer, thereby reducing the injection difficulty of medical staff.

Description

Auxiliary device for medical injection

Technical Field

The invention relates to the technical field of medical instruments, in particular to an auxiliary device for medical injection.

Background

When medical staff injects medicine treatment for the patient who suffers from the disease, it is indispensable to use the syringe, and the traditional method is that medical staff uses simple disposable syringe to inject the medicine to patient, but some patients can shake by oneself when putting the hand on the desk and waiting to inject because of nervous, and some patients are difficult to observe clearly with the naked eye because self blood vessel is thin, and these all have improved the difficulty of injection operation for medical staff.

Therefore, the development of a medical injection aid to reduce the difficulty of injection for medical staff has become an urgent problem in the industry today.

Disclosure of Invention

The invention aims to provide an auxiliary device for medical injection, which can keep the arm of a patient stable during injection and can make the blood vessel of the patient clearer, thereby reducing the injection difficulty of medical staff.

The technical scheme of the invention is as follows: an auxiliary device for medical injection comprises a mounting base plate, an L-shaped mounting seat arranged on the mounting base plate in a sliding mode and a hand pressing mechanism arranged on the L-shaped mounting seat and used for blocking blood flow, wherein the L-shaped mounting seat comprises a base and a side plate vertically arranged on the base, and a round hole is formed in the side plate; the pressing mechanism comprises a cylinder, one end of the cylinder penetrates through and is fixed in the round hole, a cylindrical air bag is arranged on the inner side wall of the cylinder, a first telescopic ring and a second telescopic ring are respectively arranged on two sides inside the cylindrical air bag, and a first spring is arranged between the first telescopic ring and the second telescopic ring; the cylinder is provided with a connector in a penetrating way, the bottom end of the connector extends into the cylinder and is communicated with the interior of the cylindrical air bag, the top end of the connector is connected with a pressing air bag through a pipeline, and the tail end of the pressing air bag is connected with a one-way air valve; the cylinder is also provided with an air release pipe, the bottom end of the air release pipe extends into the cylinder and is communicated with the inside of the cylindrical air bag, and the top end of the air release pipe is in threaded connection with a sealing nut.

In the auxiliary device for medical injection, the fixing ring is arranged at one end of the cylinder, which extends into the round hole, and the fixing ring is fixed on the side wall of the side plate through a screw; the outside cover of drum is equipped with the silica gel ring to the silica gel ring sets up between solid fixed ring and curb plate.

In the auxiliary device for medical injection, an arm fixing mechanism is arranged inside one end of the cylinder corresponding to the fixing ring, a threaded portion is turned on the inner wall of the cylinder, the arm fixing mechanism comprises a threaded ring, the threaded ring is in threaded connection with the threaded portion on the inner wall of the cylinder, and a limiting shoulder abutting against the fixing ring is arranged at the end of the threaded ring; the inboard of screw ring is equipped with a plurality of arms that are the annular and distributes and presses down the subassembly, the subassembly is pressed down to the arm includes that telescopic link, second spring and arc press the platen, the one end of telescopic link is fixed in the inboard of screw ring, and the other end of telescopic link and arc press the extrados fixed connection of platen, the outside at the telescopic link is established to the second spring housing to the one end of second spring is fixed in the inboard of screw ring, and the other end of second spring is fixed in the arc and presses on the extrados of platen.

In the auxiliary device for medical injection, a spongy cushion is fixed on the inner arc surface of the arc-shaped pressing plate.

In the auxiliary device for medical injection, the bottom of the cylinder is slidably connected with the hand support plate, the dovetail groove is formed in the upper side of the hand support plate, and the bottom of the cylinder is provided with the dovetail convex strip matched with the dovetail groove.

In the auxiliary device for medical injection, a plurality of uniformly arranged circular grooves are formed in the dovetail groove, a cylindrical groove is formed in the bottom of the dovetail convex strip, a stud is connected to the inner thread of the cylindrical groove, a third spring is fixedly connected to the bottom end of the stud, a cylindrical slider is connected to the bottom end of the third spring in a threaded mode, a circular top is arranged at the bottom end of the cylindrical slider, and the circular top extends to the outer portion of the cylindrical groove and is matched with one of the circular grooves.

According to the auxiliary device for medical injection, the base is provided with the T-shaped rod, the T-shaped rod is located below the supporting plate, the two ends of the T-shaped rod are respectively provided with the roller, and the bottom surface of the hand supporting plate abuts against the two rollers.

In the auxiliary device for medical injection, the base is provided with the visual auxiliary mechanism, the visual auxiliary mechanism comprises the fixing tubes, the U-shaped rods and the magnifying lens, the fixing tubes are symmetrically arranged on the base, two end parts of the U-shaped rods respectively extend into the two fixing tubes, and the U-shaped rods are fixed by the first locking screws arranged on the side walls of the fixing tubes; the front part of the U-shaped rod is provided with a U-shaped hinge piece, the periphery of the magnifier is provided with a connecting block, one side of the connecting block is provided with a positioning groove, one side of the U-shaped hinge piece is provided with a second locking screw in a penetrating way, and the bottom end of the second locking screw is abutted to the positioning groove; the bottom edge of the magnifying glass is provided with a plurality of LED lamps.

Aforementioned auxiliary device of medical injection, be equipped with the L shape slide rail that two symmetries and handstand set up on the mounting plate, the bottom of base is equipped with the spout, the both sides of spout all are equipped with the kicking block of an L shape slide rail looks adaptation, the kicking block is the silica gel material to kicking block and L shape slide rail extrusion fit.

Compared with the prior art, the invention firstly installs the mounting base plate on the platform, then the L-shaped mounting base of the device is arranged on the mounting base plate in a sliding way, the side plate of the L-shaped mounting base is provided with the hand pressing mechanism inserted on the round hole, the patient extends the hand into the cylinder of the hand pressing mechanism and extends the palm from the other end of the cylinder, the tube-shaped air bag fixed on the inner side of the cylinder is inflated by discontinuously pressing the pressing air bag positioned above the cylinder, the tube-shaped air bag is expanded to press the arm of the patient, and the circulation of blood in the arm blood vessel is blocked, so that the blood vessel on the back of the hand is expanded, the blood vessel is clearer, and the observation of medical staff is convenient. And, the tube-shape gasbag is compared and is tied up on the arm in the rubber tape, and the area of contact of tube-shape gasbag and arm is bigger, and is softer moreover, and not only patient's experience is more comfortable, can alleviate patient's tension moreover, guarantees that patient's hand does not take place the shake to reduce medical staff's the injection degree of difficulty. In addition, the cylinder and the round hole are assembled in an interference fit mode, and the fixing ring at one end, extending into the round hole, of the cylinder is fixed on the side wall of the side plate through a screw, so that the cylinder is convenient to assemble and disassemble and is very firm to install. In addition, through pressing from both sides between solid fixed ring and curb plate and establish the silica gel ring, can increase the pretightning force of screw, improve solid fixed ring's fixed effect. According to the arm fixing device, the arm fixing mechanism is arranged on one side, corresponding to the fixing ring, of the cylinder, the threaded ring of the arm fixing mechanism is screwed into the threaded portion of the inner wall of the cylinder, after an arm extends into the cylinder, the arm is pressed by the arm pressing assemblies arranged on the inner side of the threaded ring, the arm pressing assemblies press the arc-shaped pressing plate through spring force, and then the arc-shaped pressing plate is pressed on the arm of a patient, and the arm fixing mechanism not only can fix the arm to a certain extent, but also can enable the arm to move slightly, so that the comfort level of the patient can be guaranteed. According to the invention, the spongy cushion is fixed on the inner arc surface of the arc pressing plate to ensure that the arc pressing plate is in soft contact with the arm of the patient, so that the comfort of the patient is enhanced. According to the invention, the hand support plate for placing the palm of the patient is arranged at the bottom of the cylinder, so that the hand placing posture of the patient is more comfortable, and the matching mode of the hand support plate and the bottom of the cylinder is the mode that the dovetail groove is matched with the dovetail convex strip, so that the function of sliding the hand support plate is realized, the length can be automatically adjusted according to the length of the palm of the patient, and the cylinder is very convenient. According to the invention, the bottom of the dovetail convex strip is provided with the cylindrical groove, the third spring in the cylindrical groove provides spring force for the cylindrical sliding block, so that the dome of the cylindrical sliding block extends out of the cylindrical groove, the plurality of circular grooves are arranged in the dovetail groove, when the hand supporting plate slides, the dome of the cylindrical sliding block is inserted into one of the circular grooves, the fixing effect of the hand supporting plate can be enhanced, meanwhile, the hand supporting plate can be pushed open only by slight force, and the operation is very convenient. The hand support plate is abutted against the two rollers to slide, the rollers support the hand support plate, and the hand support plate can slide more stably. The base is provided with the visual auxiliary mechanism, the visual auxiliary mechanism comprises a fixed pipe and a U-shaped rod capable of lifting along the extension direction of the fixed pipe, the front part of the U-shaped rod is hinged with the magnifier for observing blood vessels, the height of the magnifier can be adjusted by adjusting a first locking screw arranged on the fixed pipe and dragging the U-shaped rod, and the operation is very convenient. In addition, the edge of the bottom of the magnifier is provided with a plurality of LED lamps, so that the illuminance of the operating environment is improved, and medical staff can observe blood vessels more clearly. The top block of the base is matched with the L-shaped slide rail on the bottom plate to realize the slidable function of the base, and the top block is made of silica gel, so that the friction force between the top block and the L-shaped slide rail can be increased, and the base is not easy to deviate when in rest.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic view of the interior of the tubular bladder of the present invention;

FIG. 3 is a schematic view of the mounting structure of the hand pressing mechanism and the arm fixing mechanism according to the present invention;

FIG. 4 is a schematic view of the mounting structure of the hand pressing mechanism of the present invention;

FIG. 5 is a schematic structural view of an arm fixing mechanism according to the present invention;

FIG. 6 is a schematic view of a mounting mechanism for a hand support plate according to the present invention;

FIG. 7 is a schematic view of the fitting structure of the cylindrical slider and the circular groove according to the present invention;

FIG. 8 is a schematic view of the visual aid of the present invention;

FIG. 9 is a schematic view of the U-shaped hinge assembly and the connector of the present invention;

FIG. 10 is a schematic view of the bottom plate and the base of the present invention.

Reference numerals

1. Mounting a bottom plate; 2. a base; 3. a side plate; 4. an L-shaped mounting seat; 5. a hand pressing mechanism; 6. a circular hole; 7. a cylinder; 8. a cylindrical air bag; 9. a connector; 10. pressing the air bag; 11. a one-way air valve; 12. discharging the air pipe; 13. a sealing nut; 14. a hand support plate; 15. a vision assistance mechanism; 16. an arm pressing assembly; 17. a first telescopic ring; 18. a second telescopic ring; 19. a first spring; 20. an arm fixing mechanism; 21. a threaded ring; 22. a limiting shoulder; 23. a fixing ring; 24. a silica gel ring; 25. a threaded portion; 26. a telescopic rod; 27. a second spring; 28. an arc-shaped pressing plate; 29. a sponge cushion; 30. a dovetail groove; 31. a circular groove; 32. dovetail convex strips; 33. a T-shaped rod; 34. a roller; 35. a cylindrical groove; 36. a stud; 37. a third spring; 38. a cylindrical slider; 39. a fixed tube; 40. a U-shaped rod; 41. a first locking screw; 42. a U-shaped hinge; 43. connecting blocks; 44. a second locking screw; 45. a magnifying glass; 46. an LED lamp; 47. positioning a groove; 48. a chute; 49. a top block; 50. an L-shaped slide rail; 51. a dome.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example (b): an auxiliary device for medical injection is shown in fig. 1 and comprises a mounting bottom plate 1, an L-shaped mounting seat 4 arranged on the mounting bottom plate 1 in a sliding mode and a hand pressing mechanism 5 arranged on the L-shaped mounting seat 4 and used for blocking blood flow, wherein the L-shaped mounting seat 4 comprises a base 2 and a side plate 3 vertically arranged on the base 2, and a round hole 6 is formed in the side plate 3; the hand pressing mechanism 5 comprises a cylinder 7, one end of the cylinder 7 penetrates through and is fixed in the round hole 6, a cylindrical air bag 8 is fixed on the inner wall of the cylinder 7, a first telescopic ring 17 is fixed on one side, close to the inner wall of the cylinder 7, in the cylindrical air bag 8, a second telescopic ring 18 is fixed on one side, far away from the inner wall of the cylinder 7, in the cylindrical air bag 8, a plurality of first springs 19 distributed in a circumferential array are clamped between the first telescopic ring 17 and the second telescopic ring 18, one end of each first spring 19 is fixed on the inner ring wall of the corresponding first telescopic ring 17, the other end of each first spring 19 is fixed on the outer ring wall of the corresponding second telescopic ring 18, and the first telescopic ring 17 and the second telescopic ring 18 are made of rubber materials; the top of the cylinder 7 is provided with a connector 9 in a penetrating manner, the bottom end of the connector 9 extends into the cylinder 7 and is communicated with the inside of the cylindrical air bag 8, the top end of the connector 9 is connected with a pressing air bag 10 through a pipeline, and the tail end of the pressing air bag 10 is inserted with a one-way air valve 11; the top of the cylinder 7 is also provided with an air release pipe 12 in a penetrating way, the bottom end of the air release pipe 12 extends into the cylinder 7 and is communicated with the inside of the cylindrical air bag 8, and the top end of the air release pipe 12 is connected with a sealing nut 13 in a threaded way.

As shown in fig. 4, a fixing ring 23 extending outward in the radial direction is arranged at one end of the cylinder 7 extending into the circular hole 6, the outer wall of the cylinder 7 is in interference fit with the inner wall of the circular hole 6, and the fixing ring 23 is fixed on the side wall of the side plate 3 through screws, so that the mounting mode is very convenient to assemble and disassemble and is very firm to mount; the outside cover of drum 7 is equipped with silica gel ring 24 to silica gel ring 24 presss from both sides and locates between solid fixed ring 23 and curb plate 3, can increase the pretightning force of screw through silica gel ring 24, improves solid fixed ring 23's fixed effect.

As shown in fig. 3-5, an arm fixing mechanism 20 is provided inside one end of the cylinder 7 corresponding to the fixing ring 23, a threaded portion 25 is lathed on the inner wall of the cylinder 7, the arm fixing mechanism 20 includes a threaded ring 21, the threaded ring 21 is in threaded connection with the threaded portion 25 on the inner wall of the cylinder 7, and a limiting shoulder 22 abutting against the fixing ring 23 is provided at an end of the threaded ring 21; the inner side of the threaded ring 21 is provided with a plurality of arm pressing assemblies 16 distributed in a circumferential array, each arm pressing assembly 16 comprises an expansion link 26, a second spring 27 and an arc-shaped pressing plate 28, one end of the expansion link 26 is fixed to the inner side of the threaded ring 21 through welding, the other end of the expansion link 26 is fixedly connected with the outer arc surface of the arc-shaped pressing plate 28 through welding, the second spring 27 is sleeved on the outer side of the expansion link 26, one end of the second spring 27 is fixed to the inner side of the threaded ring 21 through welding, and the other end of the second spring 27 is fixed to the outer arc surface of the arc-shaped pressing plate 28 through welding. The threaded ring 21 of the arm fixing mechanism 20 is screwed into the threaded portion 25 on the inner wall of the cylinder 7, after an arm extends into the cylinder 7, the arm pressing assemblies 16 arranged on the inner side of the threaded ring 21 press the arm, the arm pressing assemblies 16 press the arc-shaped pressing plate 28 through spring force, and then the arc-shaped pressing plate 28 presses the arm of a patient, and the arm fixing mechanism 20 not only can fix the arm to a certain extent, but also can enable the arm to move slightly, so that the comfort level of the patient can be guaranteed. A spongy cushion 29 is fixed on the inner arc surface of the arc pressing plate 28 through glue, so that the arc pressing plate 28 is in soft contact with the arm of the patient, and the comfort of the patient is enhanced.

As shown in fig. 2, the first telescopic ring 17, the first spring 19 and the second telescopic ring 18 have two or more sets, and the elastic coefficients of the sets of first springs 19 increase from left to right. Therefore, when the tubular air bag 8 is inflated, the inflation quantity from the right side (namely the arm extending end) to the left side (and the arm extending end) of the tubular air bag 8 is linearly reduced, the extrusion force of the tubular air bag 8 to the arm is sequentially reduced from right to left, and the extrusion force of the tubular air bag 8 to the arm is slowly increased in the continuous inflation process, so that the blood of the part, close to the body, of the arm is extruded to the part, far away from the body, of the arm, the blood vessel on the back of the hand can be effectively expanded, the blood vessel is clearer, and the medical staff can observe and perform injection operation conveniently.

As shown in fig. 6 and 7, the bottom of the cylinder 7 is slidably connected with a hand support plate 14 for preventing palms of patients, so that the hand of a patient can be placed more comfortably, the dovetail groove 30 is formed in the upper side of the hand support plate 14, and the bottom of the cylinder 7 is provided with a dovetail convex strip 32 matched with the dovetail groove 30, so that the function of sliding the hand support plate 14 is realized, the length can be automatically adjusted according to the length of the palms of the patients, and the operation is very convenient. The dovetail groove 30 is internally provided with a plurality of uniformly arranged circular grooves 31, each circular groove 31 is in a hemispherical shape, the bottom of each dovetail convex strip 32 is provided with a cylindrical groove 35, each cylindrical groove 35 is internally threaded with a stud 36, the bottom end of each stud 36 is fixedly connected with a third spring 37, the bottom end of each third spring 37 is in threaded connection with a cylindrical slider 38, each third spring 37 provides spring force for each cylindrical slider 38, the bottom end of each cylindrical slider 38 is provided with a dome 51, and the domes 51 extend to the outside of the cylindrical grooves 35 and are matched with one circular groove 31. When the hand support plate 14 is slid, the dome 51 of the cylindrical slider 38 is inserted into one of the circular grooves 31, so that the fixing effect of the hand support plate 14 can be enhanced, and meanwhile, the hand support plate 14 can be pushed away with little effort, so that the operation is very convenient.

As shown in fig. 6, a T-shaped rod 33 is disposed on the base 2, the bottom end of the T-shaped rod 33 is welded on the base 2, the T-shaped rod 33 is located below the support plate, two ends of the T-shaped rod 33 are respectively rotatably connected with a roller 34, the bottom surface of the hand support plate 14 abuts against the two rollers 34, and the rollers 34 support the hand support plate 14 and enable the hand support plate 14 to slide more stably.

As shown in fig. 8 and 9, the base 2 is provided with the visual assisting mechanism 15, the visual assisting mechanism 15 includes a fixing tube 39, a U-shaped rod 40 and a magnifying lens 45, the magnifying lens 45 is used for observing blood vessels, the fixing tube 39 has two symmetrically arranged parts and is arranged on the base 2, two ends of the U-shaped rod 40 respectively extend into the two fixing tubes 39, the U-shaped rod 40 is fixed by a first locking screw 41 penetrating through the side wall of the fixing tube 39, and the height of the magnifying lens 45 can be adjusted by adjusting the first locking screw 41 arranged on the fixing tube 39 and dragging the U-shaped rod 40, so that the operation is very convenient; the front part of the U-shaped rod 40 is provided with a U-shaped hinge 42, the periphery of the magnifier 45 is provided with a connecting block 43, one side of the connecting block 43 is provided with a positioning groove 47, one side of the U-shaped hinge 42 is provided with a second locking screw 44 in a penetrating manner, the bottom end of the second locking screw 44 is abutted against the positioning groove 47, and the angle of the magnifier 45 can be adjusted by adjusting the second locking screw 44 and swinging the magnifier 45; the bottom edge of the magnifier 45 is provided with a plurality of LED lamps 46, so that the illuminance of the operating environment is improved, and medical staff can observe blood vessels more clearly.

As shown in fig. 10, two symmetrical and inverted L-shaped slide rails 50 are arranged on the mounting base plate 1, a slide groove 48 is arranged at the bottom of the base 2, two sides of the slide groove 48 are respectively provided with a top block 49 adapted to the L-shaped slide rail 50, and the top block 49 of the base 2 is adapted to the L-shaped slide rail 50 on the base plate to realize the slidable function of the base 2. The kicking block 49 is the silica gel material to kicking block 49 and the extrusion fit of L shape slide rail 50 can increase the frictional force between kicking block 49 and the L shape slide rail 50, are difficult to take place the skew when making base 2 static.

The working principle is as follows: the invention firstly installs an installation bottom plate 1 on a platform, then an L-shaped installation seat 4 of the device is arranged on the installation bottom plate 1 in a sliding way, a side plate 3 of the L-shaped installation seat 4 is provided with a round hole 6 which is inserted with a hand pressing mechanism 5, a patient extends the hand into a cylinder 7 of the hand pressing mechanism 5 and extends the palm out of the other end of the cylinder 7, the cylinder-shaped air bag 8 fixed at the inner side of the cylinder 7 is inflated by pressing a pressing air bag 10 positioned above the cylinder 7 discontinuously, as the cylinder-shaped air bag 8 is internally provided with a plurality of groups of first springs 19 with elasticity coefficients which are increased from left to right, the inflation quantity from the right side (namely the arm extending end) to the left side (and the arm extending end) of the cylinder-shaped air bag 8 is reduced linearly, the extrusion force of the cylinder-shaped air bag 8 to the arm is reduced from right to left in sequence, and the extrusion force of the cylinder-shaped air bag 8 to the arm is increased slowly in the continuous inflation process, thereby the blood of the arm close to the body part is extruded to the arm far away from the body part, thereby expanding the blood vessels on the back of the hand, making the blood vessels clearer and facilitating the observation of medical staff. And, tube-shape gasbag 8 compares to tie up on the arm in the rubber tape, and the area of contact of tube-shape gasbag 8 and arm is bigger, and is softer moreover, and not only patient's experience is more comfortable, can alleviate patient's tension moreover, guarantees that patient's hand does not take place the shake to reduce medical staff's the injection degree of difficulty.

Claims

1. An auxiliary device for medical injection, which is characterized in that: the blood flow blocking device comprises a mounting base plate (1), an L-shaped mounting seat (4) arranged on the mounting base plate (1) in a sliding mode and a hand pressing mechanism (5) arranged on the L-shaped mounting seat (4) and used for blocking blood flow, wherein the L-shaped mounting seat (4) comprises a base (2) and a side plate (3) vertically arranged on the base (2), and a round hole (6) is formed in the side plate (3); the hand pressing mechanism (5) comprises a cylinder (7), one end of the cylinder (7) penetrates through and is fixed in the round hole (6), a cylindrical air bag (8) is arranged on the inner side wall of the cylinder (7), a first telescopic ring (17) and a second telescopic ring (18) are respectively arranged on two sides of the interior of the cylindrical air bag (8), a first spring (19) is arranged between the first telescopic ring (17) and the second telescopic ring (18), the first telescopic ring (17), the first spring (19) and the second telescopic ring (18) are provided with multiple groups, and the elastic coefficients of the multiple groups of the first springs (19) are sequentially increased from the arm extending end to the arm extending end; a connector (9) penetrates through the cylinder (7), the bottom end of the connector (9) extends into the cylinder (7) and is communicated with the interior of the cylindrical air bag (8), the top end of the connector (9) is connected with a pressing air bag (10) through a pipeline, and the tail end of the pressing air bag (10) is connected with a one-way air valve (11); the cylinder (7) is also provided with an air release pipe (12), the bottom end of the air release pipe (12) extends into the cylinder (7) and is communicated with the interior of the cylindrical air bag (8), and the top end of the air release pipe (12) is in threaded connection with a sealing nut (13); a fixing ring (23) is arranged at one end of the cylinder (7) extending into the round hole (6), and the fixing ring (23) is fixed on the side wall of the side plate (3) through screws; a silica gel ring (24) is sleeved on the outer side of the cylinder (7), and the silica gel ring (24) is arranged between the fixing ring (23) and the side plate (3); an arm fixing mechanism (20) is arranged in one end, corresponding to the fixing ring (23), of the cylinder (7), a threaded portion (25) is turned on the inner wall of the cylinder (7), the arm fixing mechanism (20) comprises a threaded ring (21), the threaded ring (21) is in threaded connection with the threaded portion (25) on the inner wall of the cylinder (7), and a limiting shoulder (22) abutted against the fixing ring (23) is arranged at the end portion of the threaded ring (21); a plurality of arm pressing components (16) distributed in an annular shape are arranged on the inner side of the threaded ring (21), each arm pressing component (16) comprises a telescopic rod (26), a second spring (27) and an arc-shaped pressing plate (28), one end of each telescopic rod (26) is fixed on the inner side of the threaded ring (21), the other end of each telescopic rod (26) is fixedly connected with the outer arc surface of the arc-shaped pressing plate (28), the second spring (27) is sleeved on the outer side of each telescopic rod (26), one end of each second spring (27) is fixed on the inner side of the threaded ring (21), and the other end of each second spring (27) is fixed on the outer arc surface of the arc-shaped pressing plate (28); the visual auxiliary mechanism (15) is arranged on the base (2), the visual auxiliary mechanism (15) comprises fixing tubes (39), U-shaped rods (40) and a magnifier (45), the fixing tubes (39) are symmetrically arranged on the base (2), two end parts of each U-shaped rod (40) respectively extend into the two fixing tubes (39), and the U-shaped rods (40) are fixed through first locking screws (41) arranged on the side walls of the fixing tubes (39); a U-shaped hinge piece (42) is arranged at the front part of the U-shaped rod (40), a connecting block (43) is arranged on the periphery of the magnifying lens (45), a positioning groove (47) is formed in one side of the connecting block (43), a second locking screw (44) penetrates through one side of the U-shaped hinge piece (42), and the bottom end of the second locking screw (44) abuts against the inside of the positioning groove (47); the bottom edge of the magnifying glass (45) is provided with a plurality of LED lamps (46).

2. The medical injection aid according to claim 1, wherein: a spongy cushion (29) is fixed on the inner arc surface of the arc pressing plate (28).

3. The medical injection aid according to claim 1, wherein: the bottom of drum (7) sliding connection has hand backup pad (14), dovetail (30) have been seted up to the upside of hand backup pad (14), the bottom of drum (7) be equipped with dovetail (32) of dovetail (30) matched with.

4. The medical injection aid according to claim 3, wherein: be equipped with a plurality of align to grid's circular slot (31) in dovetail (30), the bottom of forked tail sand grip (32) is equipped with cylindrical slot (35), and cylindrical slot (35) internal thread connection has double-screw bolt (36), and the bottom fixedly connected with third spring (37) of double-screw bolt (36), the bottom threaded connection cylindricality slider (38) of third spring (37), the bottom of cylindricality slider (38) is equipped with calotte (51), and calotte (51) extend the outside and one of them circular slot (31) looks adaptation of cylindrical slot (35).

5. The medical injection aid according to claim 3, wherein: be equipped with T shape pole (33) on base (2), and T shape pole (33) are located the below of backup pad, and the both ends of T shape pole (33) are equipped with one gyro wheel (34) respectively, the bottom surface of hand backup pad (14) is supported on two gyro wheels (34).

6. The medical injection aid according to claim 1, wherein: be equipped with L shape slide rail (50) that two symmetries and handstand set up on mounting plate (1), the bottom of base (2) is equipped with spout (48), the both sides of spout (48) all are equipped with kicking block (49) of an L shape slide rail (50) looks adaptation, kicking block (49) are the silica gel material to kicking block (49) and L shape slide rail (50) extrusion fit.