CN112336943B

CN112336943B - Medical injector and matched disinfection cabinet and using method thereof

Info

Publication number: CN112336943B
Application number: CN202011240838.XA
Authority: CN
Inventors: 师小欠; 蒋来苟
Original assignee: Individual
Current assignee: Shi Xiaoqian
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-05-21
Anticipated expiration: 2040-11-09
Also published as: CN112336943A

Abstract

The invention discloses a medical injector, a matched disinfection cabinet and a using method thereof, wherein the medical injector comprises an injection tube, a piston rod and a disinfection drying cabinet, a first cavity with a right opening is formed in the injection tube, and a second cavity with a left opening is formed in the center of the left end surface of the injection tube; the injector of the invention can be used repeatedly, the economic pressure caused by repeatedly purchasing the disposable injector for the patient who is treated at home and needs to inject the medicine for a long time is reduced, and the use of the disposable injector is reduced, thereby realizing environmental protection; the injector of the invention is provided with a matched disinfecting and drying device, and the needle head of the invention can be extended out for reuse after being cleaned by the disinfecting and drying device, thereby preventing bacterial infection possibly caused by irregular operation.

Description

Medical injector and matched disinfection cabinet and using method thereof

Technical Field

The invention relates to the field of medical instruments, in particular to a medical injector, a matched disinfection cabinet and a using method thereof.

Background

The recovery measures for private use of syringes are difficult to achieve in a true position, resulting in many chronically ill patients who require long-term treatment to keep a lot of syringes in their homes, the random disposal of used disposable syringes is very likely to cause injury to cleaning personnel, is more likely to cause cross-infection, and for non-professional patients is also likely to cause injury to themselves when disposable syringes are used at home.

Disclosure of Invention

The invention aims to provide a medical injector, a matched disinfection cabinet and a using method thereof, which are used for overcoming the defects in the prior art.

The medical injector and the matched disinfection cabinet comprise an injection tube, a piston rod and a disinfection and drying cabinet, a first cavity with a right opening is arranged in the injection tube, a second cavity with a left opening is arranged at the center of the left end surface of the injection tube, a needle head which extends to the left side of the second cavity through the second cavity leftwards is arranged in the left wall of the first cavity, a first limiting block which can be abutted against the right wall of the second cavity to prevent the needle head from completely sliding into the first cavity is fixedly arranged on the needle head, a second limiting block is fixedly arranged on the part of the needle head extending rightwards into the first cavity, the second limiting block can abut against the left wall of the first cavity, a needle head fixing device capable of fixing the needle head when the needle head punctures skin is arranged in the wall of the first cavity, and a plurality of first springs are arranged on the left wall of the first cavity; a third cavity with a left opening and a right opening is formed in the piston rod, a clamping device capable of clamping the needle tube to enable the needle tube not to be exposed after use is arranged in the third cavity, a sealing ring is arranged on the left side of the outer ring surface of the piston rod, and an abutting block capable of abutting against the right end surface of the injection tube is arranged on the right end ring of the outer ring surface of the piston rod; be equipped with the ascending cavity of No. four in the disinfection drying cabinet, it has sealed lid to articulate on No. four cavity walls, the back wall internal stability has set firmly the rectangular block before No. four cavities, is located the rectangular block left and right sides set firmly No. one on No. four cavity walls respectively and put the thing piece No. two, be located put the thing piece with No. two are equipped with fore-and-aft through-hole and No. two through-holes in putting the thing piece respectively, are located be equipped with the hose that extends to the water source right on the disinfection drying cabinet right side wall, be located be equipped with in the disinfection drying cabinet be equipped with communicate in the runner of hose, be located the rectangular block downside be equipped with high temperature disinfection drying lamp and infrared sterilization lamp on No. four cavity walls, be located be equipped with in No. four cavity diapire and extend to the outer drainage pipe of disinfection drying cabinet, be equipped with.

Optionally, the flow channel is located on the upper side of the first object placing block and the second object placing block and can respectively flow into the first object placing block and the second object placing block in four directions, so that the coverage of flushing is enlarged.

Optionally, the needle fixing device comprises pressing rotating devices respectively located on the upper side and the lower side of the first cavity, a fifth cavity is arranged in the injection tube between the first cavity and the second cavity, and a rotating tightening device driven by the two pressing rotating devices is arranged in the fifth cavity.

Optionally, the pressing and rotating device on the upper side comprises a pressing bin with a left opening, the pressing bin is located on the upper side of the outer ring surface of the right edge of the injection tube, a sixth cavity is arranged in the pressing bin, a seventh cavity is arranged in the wall of the upper side of the first cavity, extends into the sixth cavity rightwards and penetrates through the fifth cavity leftwards, a pressing block capable of sliding leftwards and rightwards in the sixth cavity is connected to the right wall of the sixth cavity through a plurality of second springs, a transmission rod extending leftwards and entering the seventh cavity is installed on the left side face of the pressing block, a first gear in threaded connection with the transmission rod is located in the fifth cavity, and the first gear is rotatably connected to the left wall and the right wall of the fifth cavity and can be driven to rotate by the transverse movement of the transmission rod.

Optionally, the rotation screwing device comprises a second gear which is driven by two first gears and is connected to the left wall and the right wall of the fifth cavity in a rotating mode, an eighth cavity which is oval is arranged in the second gear in a left-right through mode, and two locking devices which are symmetrically distributed are arranged on the upper side and the lower side of the eighth cavity.

Optionally, the upside locking device including be located in the No. eight cavity can slide in the clamp splice on the No. five cavity left and right walls, the lateral surface design makes its can slide for the arcuation of evagination make in the No. eight cavity walls on the clamp splice, the clamp splice downside is the arcuation of indent, can increase the friction with the syringe needle, is located be equipped with the fixed slot that link up about the rectangle in the clamp splice, sliding connection is fixed in about in the fixed slot dead lever in the No. five cavity left and right walls, the dead lever can restrict the rotation of clamp splice.

Optionally, clamping device locates including the ring No. nine cavities in the No. three cavity walls, sliding connection has a cavity ten that extends slightly right No. three cavity right sides, extends to left the flexible stick in the No. nine cavities is located No. nine cavity right sides No. three cavity walls are fitted with a contraceptive ring and are equipped with the cavity ten, set firmly on the flexible stick anchor ring and extend to fixed plate in the cavity ten, on the fixed plate left end face through No. three springs with the left wall connection of cavity ten, flexible stick left end extends and gets into in the No. nine cavities to be equipped with two chuck devices that longitudinal symmetry distributes.

Optionally, the upside the chuck device include sliding connection in chuck in the front and back of No. nine cavities, the chuck right side the back wall internal rotation is connected with No. three gears before No. nine cavities, is located the upper right side of No. three gears the back wall internal rotation is connected with No. four gears before No. nine cavities, be equipped with on the left side outer annular face of telescopic rod can with No. four gear engagement's tooth, be located be equipped with on the left side of chuck can with No. three gear engagement's tooth, No. four gears with No. three gear engagement.

Optionally, a switch capable of controlling electrical components in the sterilizing and drying cabinet is arranged on the left wall of the sterilizing and drying cabinet.

A use method of a medical injector and a matched disinfection cabinet comprises the following specific steps:

first step when needs carry out the injection treatment, pour the liquid medicine into a cavity and put into a cavity with the piston stick in, No. two stopper butts this moment in the left surface of a cavity and because the effect of frictional force makes the syringe needle can keep the relative position with the injection syringe when not carrying out the contact with muscle, the medicine prepares to accomplish back staff two fingers and presses the pressing block, the thumb presses the telescopic stick and exerts oneself a little, this moment because the friction of sealing washer and a cavity wall makes the piston stick not take place the change of relative position with the injection syringe but makes No. two springs and No. three springs take place deformation: the second spring is pressed and deformed due to the rightward movement of the pressing block, the pressing block drives the transmission rod to move rightwards to enable the first gear to rotate, the first gear rotates to drive the second gear to rotate, and at the moment, the annular wall of the eighth cavity presses the clamping block to enable the clamping block to move towards the center relative to the fixed rod to fix the needle head; the telescopic rod is also forced by the thumb to move leftwards so as to compress the third spring, when the telescopic rod moves leftwards, teeth on the telescopic rod are meshed with the fourth gear to drive the third gear to rotate, the third gear drives the chuck to move upwards, the second limiting block can enter the ninth cavity through the third cavity, and then the force is increased to inject the medicament;

after the injection of the medicament is finished in the second step, the hand is loosened, the pressing block drives the transmission rod to reset rightwards due to the elasticity of the second spring so that the first gear rotates reversely, the second gear is driven to rotate reversely so that the clamping block is not abutted to the annular wall of the eighth cavity to unlock the needle head, meanwhile, the elasticity of the third spring enables the telescopic rod to move rightwards so that the fourth gear and the third gear move reversely so that the chuck moves towards the center to fix the second limiting block, the piston rod slides rightwards due to the elasticity of the first spring so that the needle head contracts rightwards to enter the injection tube, the action time of the elasticity of the first spring is later than that of the second spring and the third spring due to the friction of the sealing ring and the annular wall of the first cavity until the first limiting block is abutted to the right wall of the second cavity to separate the chuck from the second limiting block, and at the moment, one part of, the rest part is positioned in the first cavity to avoid the risk of puncture.

Thirdly, when the work of the injection tube and the piston rod is finished, the piston rod is pulled out, the sealing cover is opened, the injection tube is placed in the fourth cavity through the first through hole, the left side surface of the pressing bin abuts against the upper side surface of the first object placing block, the piston rod is placed in the fourth cavity through the second through hole, the left side surface of the abutting block abuts against the upper side surface of the second object placing block, the sealing cover is closed, the switch is started, the centrifugal water pump is started to enable water to enter the flow channel through the hose, water flows into the upper sides of the first object placing block and the second object placing block from multiple directions, the water flows scour the injection tube and the piston rod and then downwards permeates through the drainage pipeline to be discharged outside the syringe, the water flows into the first cavity to flow out through the needle head when the injection tube is washed, and the needle head slides downwards under the action of pressure because of the centrifugal water pump is over high in power until the second limiting block abuts against the left wall of the first, after a certain time, the centrifugal water pump is turned off, the high-temperature sterilizing and drying lamp and the infrared sterilizing lamp work at the same time, and after a period of time, the sterilizing and drying cabinet is powered off, so that the invention finishes resetting.

The invention has the beneficial effects that: the invention can automatically contract the needle after use, thereby preventing the exposed needle from causing possible injury to patients or medical care personnel;

the injector of the invention can be used repeatedly, the economic pressure caused by repeatedly purchasing the disposable injector for the patient who is treated at home and needs to inject the medicine for a long time is reduced, and the use of the disposable injector is reduced, thereby realizing environmental protection;

the injector of the invention is provided with a matched disinfecting and drying device, and the needle head of the invention can be extended out for reuse after being cleaned by the disinfecting and drying device, thereby preventing bacterial infection possibly caused by irregular operation.

Drawings

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

FIG. 1 is a schematic view of the structure of an injection tube in a medical injector and a mating sterilizer of the present invention;

FIG. 2 is a schematic view of a piston rod in a medical injector and mating sterilizer of the present invention;

FIG. 3 is a schematic view of the structure of a sterilization drying cabinet in a medical injector and a mating sterilization cabinet according to the present invention;

FIG. 4 is a left side schematic view of the rotary tightening apparatus of FIG. 1 shown in a relaxed position;

FIG. 5 is a left side schematic view of the rotary tightening device of FIG. 1 when tightened;

fig. 6 is an enlarged schematic view of a-a in fig. 3.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-6, a medical injector and a mating disinfection cabinet according to an embodiment of the present invention includes an injection tube 111, a piston rod 112 and a disinfection drying cabinet 113, a first cavity 81 with a right opening is provided in the injection tube 111, a second cavity 82 with a left opening is provided at a central position of a left end surface of the injection tube 111, a needle 13 extending to the left of the second cavity 82 through the second cavity 82 is provided in a left wall of the first cavity 81, a first stopper 14 capable of abutting against a right wall of the second cavity 82 to prevent the needle 13 from completely sliding into the first cavity 81 is fixedly provided on the needle 13, a second stopper 15 is fixedly provided at a portion of the needle 13 extending to the right into the first cavity 81, the second stopper 15 can abut against a left wall of the first cavity 81, a needle fixing device 101 capable of fixing the needle 13 when the needle 13 performs skin puncture is provided in a wall of the first cavity 81, a plurality of first springs 16 are arranged on the left wall of the first cavity 81; a third cavity 83 with a left opening and a right opening is arranged in the piston rod 112, a clamping device 102 capable of clamping the needle tube 13 so that the needle tube is not exposed after use is arranged in the third cavity 83, a sealing ring 17 is arranged on the left side of the outer annular surface of the piston rod 112, and an abutting block 18 capable of abutting against the right end surface of the injection tube 111 is annularly arranged on the right end of the outer annular surface of the piston rod 112; a fourth cavity 84 with an upward opening is arranged in the disinfection and drying cabinet 113, a sealing cover 24 is hinged on the wall of the fourth cavity 84, a rectangular block 19 is fixedly arranged in the front wall and the rear wall of the fourth cavity 84, a first storage block 20 and a second storage block 21 are respectively fixedly arranged on the wall of the fourth cavity 84 positioned at the left side and the right side of the rectangular block 19, a longitudinal first through hole 22 and a longitudinal second through hole 23 are respectively arranged in the first storage block 20 and the second storage block 21, a hose 71 extending rightwards to a water source is arranged on the right wall of the disinfection and drying cabinet 113, a flow passage 25 communicated with the hose 71 is arranged in the disinfection and drying cabinet 113, a high-temperature disinfection and drying lamp and an infrared sterilization lamp 27 are arranged on the wall of the fourth cavity 84 positioned at the lower side of the rectangular block 19, a drainage pipeline 28 extending out of the disinfection and drying cabinet 113 is arranged in the bottom wall of the fourth cavity 84, a centrifugal water pump 29 is arranged in the water discharge pipeline 28.

Preferably, the flow channel 25 is located above the first article holding block 20 and the second article holding block 21 and can flow into the first article holding block 20 and the second article holding block 27 in four directions, so that the coverage of flushing is increased.

Preferably, the needle fixing device 101 includes pressing rotating devices 104 respectively located at upper and lower sides of the first cavity 81, a fifth cavity 85 is disposed in the injection tube 111 located between the first cavity 81 and the second cavity 82, and a rotating tightening device 105 driven by the two pressing rotating devices 104 is disposed in the fifth cavity 85.

Preferably, taking the pressing and rotating device 104 located at the upper side as an example, the pressing and rotating device 104 includes a pressing chamber 12 with a left opening located at the upper side of the outer annular surface at the right edge of the syringe 111, a sixth cavity 86 is arranged in the pressing bin 12, a seventh cavity 87 which extends rightwards into the sixth cavity 86 and leftwards penetrates through the fifth cavity 85 is arranged in the wall of the upper side of the first cavity 81, the right wall of the No. six cavity 86 is connected with a pressing block 39 which can slide left and right in the No. six cavity 86 through a plurality of No. two springs 91, a transmission rod 40 extending leftwards into the seventh cavity 87 is arranged on the left side surface of the pressing block 39, a first gear 41 in threaded connection with the transmission rod 40 is arranged in the fifth cavity 85, the first gear 41 is rotatably connected to the left and right walls of the fifth cavity 85 and can be driven to rotate by the transverse movement of the transmission rod 40.

Preferably, the rotary tightening device 105 comprises a second gear 42 which is driven by two first gears 41 and is rotatably connected to the left wall and the right wall of the fifth cavity 85, an eighth cavity 88 which is oval is arranged in the second gear 42, and two locking devices 106 which are symmetrically distributed are arranged on the upper side and the lower side of the eighth cavity 88.

Preferably, use the locking device 106 who is located the upside as an example, locking device 106 is including being located in eight cavity 88 can slide in clamp splice 43 on the wall about No. five cavity 85, the side design is the arcuation of evagination on clamp splice 43 makes it can slide in eight cavity 88 wall, clamp splice 43 downside is the arcuation of indent, can increase the friction with syringe needle 13, is located be equipped with the fixed slot 44 that link up about the rectangle in the clamp splice 43, sliding connection has about in the fixed slot 44 is fixed in dead lever 45 in the wall about No. five cavity 85, dead lever 45 can restrict the rotation of clamp splice 43.

Preferably, clamping device 102 includes that the ring is located No. nine cavity 89 in No. three cavity 83 walls, sliding connection has a right side to extend slightly to No. three cavity 83 right sides, extend to left telescopic rod 30 in No. nine cavity 89, is located No. nine cavity 89 right side No. three cavity 83 walls fit with a contraceptive ring and are equipped with No. ten cavity 90, telescopic rod 30 sets firmly on the anchor ring extend to fixed plate 31 in No. ten cavity 90, on the fixed plate 31 left end face through No. three spring 93 with No. ten cavity 90's left wall is connected, telescopic rod 30 left end extends to get into in No. nine cavity 89 to be equipped with two chuck devices 103 of vertical symmetric distribution.

Preferably, taking the chuck device 103 located on the upper side as an example, the chuck device 103 includes a chuck 35 slidably connected to the front and rear surfaces of the No. nine cavity 89, a No. three gear 36 is rotatably connected to the front and rear walls of the No. nine cavity 89 on the right side of the chuck 35, a No. four gear 37 is rotatably connected to the front and rear walls of the No. nine cavity 89 on the right upper side of the No. three gear 36, teeth capable of meshing with the No. four gear 37 are provided on the outer circumferential surface on the left side of the telescopic rod 30, teeth capable of meshing with the No. three gear 36 are provided on the left circumferential surface of the chuck 35, and the No. four gear 37 meshes with the No. three gear 36.

Preferably, a switch 75 capable of controlling electrical components in the sterilizing and drying cabinet 113 is disposed on the left wall of the sterilizing and drying cabinet 113.

first step when needing to carry out the injection treatment, pour into the liquid medicine in cavity 81 and put piston rod 112 into cavity 81, No. two stopper 15 butt in cavity 81 left side and make syringe needle 13 can keep the relative position with syringe 111 when not carrying out the contact with the muscle because of the effect of frictional force this moment, the staff two fingers press according to piece 39 after the medicine is prepared to completion, the thumb is pressed flexible stick 30 and is exerted oneself a little, make piston rod 112 and syringe 111 not take place the change of relative position but make No. two spring 91 and No. three spring 93 take place the deformation owing to the friction of sealing washer 17 and cavity 81 wall at this moment: the second spring 91 is pressed and deformed due to the rightward movement of the pressing block 39, the pressing block 39 drives the transmission rod 40 to move rightward, so that the first gear 41 rotates, the second gear 42 rotates, and at the moment, the annular wall of the eighth cavity 88 presses the clamping block 43 to move towards the center relative to the fixed rod 45 so as to fix the needle 13; the telescopic rod 30 is also forced by the thumb to move leftwards so that the third spring 93 is compressed, when the telescopic rod 30 moves leftwards, teeth on the telescopic rod drive the third gear 36 to rotate through meshing with the fourth gear 37, the third gear 36 drives the chuck to move upwards, at the moment, the second limiting block 15 can enter the ninth cavity 89 through the third cavity 83, and then the force is increased to inject the medicament;

after the injection of the second step, the hand is released, the pressing block 39 drives the transmission rod 40 to reset rightwards due to the elastic force of the second spring 91 so that the first gear 41 rotates reversely, at the same time, the second gear 42 is driven to rotate reversely so that the clamping block 43 is not abutted to the annular wall of the eighth cavity 88 any more so that the locking of the needle 13 is released, at the same time, the elastic force of the third spring 93 enables the telescopic rod 30 to move rightwards so that the fourth gear 37 and the third gear 36 move reversely so that the chuck 35 moves towards the center to fix the second limiting block 16, at the same time, the piston rod 112 slides rightwards due to the elastic force of the first spring 16 so that the needle 13 contracts rightwards to enter the injection tube 111, the elastic force action time of the first spring 16 is later than that of the second spring 91 and the third spring 93 due to the friction between the sealing ring 17 and the annular wall of the first cavity 81, until the first limiting block 14 abuts to the right wall of, now the needle is partly in cavity number five 15 and the remaining part in cavity number one 81 to avoid the risk of puncture.

Thirdly, when the work of the injection tube 111 and the piston rod 112 is finished, the piston rod 112 is pulled out, the sealing cover 24 is opened, the injection tube 111 is placed in the fourth cavity 84 through the first through hole 22, the left side surface of the pressing bin 12 abuts against the upper side surface of the first storage block 20, the piston rod 112 is placed in the fourth cavity 84 through the second through hole 23, the left side surface of the abutting block 18 abuts against the upper side surface of the second storage block 21, the sealing cover 24 is closed, the switch 75 is started, the centrifugal water pump 29 is started to enable water to enter the flow channel 25 through the hose 71, water flows into the upper sides of the first storage block 20 and the second storage block 21 from multiple directions, the water flows downwards to penetrate through the drainage pipeline 28 to be discharged out of the invention after flushing the injection tube 111 and the piston rod 112, the water flows into the first cavity 81 to flow out through the needle 13 when flushing the injection tube 111, and the needle 13 slides downwards until the pressure limiting block 15 abuts against the first storage block due to the effect of the centrifugal water pump 29, and the pressure limiting block 13 is over After a certain time, the centrifugal water pump 29 is closed on the left wall of the cavity 81, the high-temperature sterilizing and drying lamp and the infrared sterilizing lamp 27 work at the same time, and the sterilizing and drying cabinet 113 is powered off after a certain time, so that the invention finishes resetting.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A medical injector and a matched disinfection cabinet, which comprises an injection tube, a piston rod and a disinfection and drying cabinet, a first cavity with a right opening is arranged in the injection tube, a second cavity with a left opening is arranged at the center of the left end surface of the injection tube, a needle head which extends to the left side of the second cavity through the second cavity leftwards is arranged in the left wall of the first cavity, a first limiting block which can be abutted against the right wall of the second cavity to prevent the needle head from completely sliding into the first cavity is fixedly arranged on the needle head, a second limiting block is fixedly arranged on the part of the needle head extending rightwards into the first cavity, the second limiting block can abut against the left wall of the first cavity, a needle head fixing device capable of fixing the needle head when the needle head punctures skin is arranged in the wall of the first cavity, and a plurality of first springs are arranged on the left wall of the first cavity; a third cavity with a left opening and a right opening is formed in the piston rod, a clamping device capable of clamping the needle tube to enable the needle tube not to be exposed after use is arranged in the third cavity, a sealing ring is arranged on the left side of the outer ring surface of the piston rod, and an abutting block capable of abutting against the right end surface of the injection tube is arranged on the right end ring of the outer ring surface of the piston rod; be equipped with the ascending cavity of No. four in the disinfection drying cabinet, it has sealed lid to articulate on No. four cavity walls, the back wall internal stability has set firmly the rectangular block before No. four cavities, is located the rectangular block left and right sides set firmly No. one on No. four cavity walls respectively and put the thing piece No. two, be located put the thing piece with No. two are equipped with fore-and-aft through-hole and No. two through-holes in putting the thing piece respectively, are located be equipped with the hose that extends to the water source right on the disinfection drying cabinet right side wall, be located be equipped with in the disinfection drying cabinet be equipped with communicate in the runner of hose, be located the rectangular block downside be equipped with high temperature disinfection drying lamp and infrared sterilization lamp on No. four cavity walls, be located be equipped with in No. four cavity diapire and extend to the outer drainage pipe of disinfection drying cabinet, be equipped with.

2. The medical injector and mating disinfection cabinet of claim 1, wherein: the runner is located the upside of putting the thing piece and putting the thing piece No. two and can flow in respectively putting the thing piece and putting the thing piece No. two in four directions, make the coverage of washing increase.

3. The medical injector and mating disinfection cabinet of claim 1, wherein: the needle fixing device comprises pressing rotating devices which are respectively positioned on the upper side and the lower side of the first cavity, a fifth cavity is arranged in the injection tube between the first cavity and the second cavity, and a rotating tightening device driven by the two pressing rotating devices is arranged in the fifth cavity.

4. A medical injector and mating sterilizer as claimed in claim 3, wherein: the upper pressing rotating device comprises a pressing bin which is arranged on the upper side of the outer ring surface of the right edge of the injection tube and provided with a left opening, a sixth cavity is arranged in the pressing bin, a seventh cavity which extends into the sixth cavity rightwards and penetrates through the fifth cavity leftwards is arranged in the wall of the upper side of the first cavity, a pressing block which can slide leftwards and rightwards in the sixth cavity is connected to the right wall of the sixth cavity through a plurality of second springs, a transmission rod which extends leftwards and enters the seventh cavity is arranged on the left side surface of the pressing block, a first gear which is in threaded connection with the transmission rod is arranged in the fifth cavity, and the first gear is rotatably connected into the left wall and the right wall of the fifth cavity and can be driven by the transverse movement of the transmission rod to rotate.

5. A medical injector and mating sterilizer as claimed in claim 3, wherein: the rotation screwing device comprises a second gear which is driven by two first gears and is connected with the left wall and the right wall of the fifth cavity, an eighth cavity which is oval is arranged in the second gear in a left-right through mode, and two locking devices which are symmetrically distributed are arranged on the upper side and the lower side of the eighth cavity.

6. The medical injector and mating disinfection cabinet of claim 5, wherein: upside locking device including being located in the No. eight cavity can slide in the clamp splice on the No. five cavity left and right walls, the side design makes its can slide for the arcuation of evagination on the clamp splice in the No. eight cavity walls, the clamp splice downside is the arcuation of indent, can increase the friction with the syringe needle, is located be equipped with the fixed slot that link up about the rectangle in the clamp splice, sliding connection is fixed in about in the fixed slot dead lever in the No. five cavity left and right walls, the dead lever can restrict the rotation of clamp splice.

7. The medical injector and mating disinfection cabinet of claim 1, wherein: clamping device locates including the ring No. nine cavities in the No. three cavity walls, No. three cavity sliding connection have extend to slightly right No. three cavity right sides, extend to left No. telescopic rod in the No. nine cavities is located No. nine cavity right sides No. three cavity walls are fitted with a contraceptive ring and are equipped with No. ten cavities, set firmly on the telescopic rod anchor ring and extend to fixed plate in the No. ten cavities, on the fixed plate left end face through No. three springs with the left wall connection of No. ten cavities, telescopic rod left end extends to get into in the No. nine cavities to be equipped with two chuck devices that vertical symmetry distributes.

8. The medical injector and mating sterilizer of claim 7, wherein: upside the chuck device include sliding connection in chuck in the front and back face of No. nine cavities, the chuck right side the back wall internal rotation is connected with No. three gears before No. nine cavities, is located No. three gear upper right side the back wall internal rotation is connected with No. four gears before No. nine cavities, be equipped with on the left side outer annular face of flexible stick can with No. four gear engagement's tooth, be located be equipped with on the left side of chuck can with No. three gear engagement's tooth, No. four gears with No. three gear engagement.

9. The medical injector and mating disinfection cabinet of claim 1, wherein: and a switch which can control the electrical elements in the disinfection drying cabinet is arranged on the left wall of the disinfection drying cabinet.