CN113384442A

CN113384442A - Auxiliary sheath for transfusion

Info

Publication number: CN113384442A
Application number: CN202110708238.XA
Authority: CN
Inventors: 陈雪美
Original assignee: Changzhou Jintan First People's Hospital
Current assignee: Changzhou Jintan First People's Hospital
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-09-14

Abstract

The application relates to an auxiliary sheath for transfusion, which relates to the field of medical auxiliary appliances, and comprises a sheath, a blood circulation device is arranged on the sheath, the blood circulation device comprises a massage mechanism and a driving mechanism used for driving the massage mechanism to work, the massage mechanism and the driving mechanism are both arranged on the sheath, and the driving mechanism is connected with the massage mechanism. The arm massage device has the effects of massaging the arms of a patient, promoting blood circulation in the arms of the patient and further reducing the possibility of arm numbness of the patient.

Description

Auxiliary sheath for transfusion

Technical Field

The application relates to the field of medical auxiliary appliances, in particular to an auxiliary sheath for infusion.

Background

Infusion refers to a large dose of injection which is infused into the body by intravenous drip, and the volume of the injection is more than 100 milliliters at a time. It is a branch of injection, usually packaged in glass or plastic infusion bottles or bags, and contains no bacteriostatic agent. When in use, the dropping speed is adjusted through the infusion apparatus, and the medicine is continuously and stably infused into the body of a patient.

The inventor finds that the infusion time is generally long, the infusion time of a day is often more than 5 hours for some critically ill patients, and during the infusion time, the arms of the patients need to be kept still all the time, so that the arm numbness condition is easy to occur, and the pain of the patients is increased.

Disclosure of Invention

In order to solve the problem of arm numbness of a patient during infusion, the application provides an auxiliary sheath for infusion.

The application provides an auxiliary sheath for infusion adopts following technical scheme:

the utility model provides an infusion is with supplementary sheath, includes the sheath, be equipped with blood circulation device on the sheath, blood circulation device includes massage mechanism and is used for driving the actuating mechanism of massage mechanism work, massage mechanism and actuating mechanism all locate on the sheath, actuating mechanism is connected with massage mechanism.

By adopting the technical scheme, when a patient transfuses, the protective sleeve is wound on the arm of the patient, the driving mechanism drives the massage mechanism to move, the arm of the patient is massaged, the blood circulation in the arm of the patient is promoted, the possibility of arm numbness of the patient is reduced, and the pain suffered by the patient in the treatment process is reduced.

Optionally, the massage mechanism includes a cylinder and an air bag, a fixing box is arranged on the sliding sleeve, the cylinder is arranged in the fixing box, the air bag is arranged in the interlayer of the sheath, and the air bag is communicated with the cylinder.

Through adopting above-mentioned technical scheme, during the massage, the piston of cylinder removes, extrudees the gasbag with the air in the cylinder in, and the gasbag takes place the inflation after the gas increases in the gasbag, massages patient's arm, promotes the flow of patient's arm blood.

Optionally, actuating mechanism includes drive wheel and drive assembly, the drive wheel rotates to be connected in fixed box, drive assembly locates in the fixed box, and is used for ordering about the drive wheel and rotates, be equipped with the carriage release lever on the piston rod of cylinder, the drive wheel on be equipped with the actuating lever, the direction of height along fixed box is equipped with the groove of sliding on the carriage release lever, the actuating lever is located the inslot of sliding, the length in groove of sliding is not less than the actuating lever and drives the twice of the maximum distance between the wheel axle.

Through adopting above-mentioned technical scheme, when driving actuating cylinder, drive assembly makes the drive wheel rotate forever, and the drive wheel passes through the cooperation drive carriage release lever removal in actuating lever and the groove that slides afterwards, and the carriage release lever drives actuating cylinder's piston rod removal again, and then realizes the reciprocating motion of piston, is convenient for realize the massage action.

Optionally, a tightening device is further disposed on the sheath, the tightening device includes a tightening rope for tightening the arm of the patient and a tightening mechanism for rolling the tightening rope, the tightening rope is disposed in the sheath along the length direction of the sheath, the tightening mechanism is located in the fixing box, the tightening mechanism is connected with one end of the tightening rope, and one end of the tightening rope, far away from the tightening mechanism, is connected with the sheath.

Through adopting above-mentioned technical scheme, before inserting the needle tubing on patient's arm, start earlier that winding mechanism tightens up the rope, tighten up patient's arm then to tighten up the rope, hinder blood to flow, be convenient for make patient need be inserted the blood vessel of needle tubing and emerge, need not the manual ligature rubber band of medical personnel, promoted the convenience of treatment to patient.

Optionally, the tightening mechanism comprises a winding assembly, the winding assembly comprises a rotating shaft and a winding drum, the winding drum is arranged on the rotating shaft, the rotating shaft is rotatably connected with the fixed box, and one end of the tightening rope is fixedly connected with the drum surface of the winding drum.

Through adopting above-mentioned technical scheme, when tightening up the rope, the pivot rotates, drives the reel and rotates, and the reel is then with the rope rolling of tightening, and then tighten patient's arm, and is simple and convenient.

Optionally, the driving assembly includes a motor, a first bevel gear and a second bevel gear, the motor is disposed on an inner wall of the fixing box, an output shaft of the motor is connected to the first bevel gear, the second bevel gear is connected to the driving wheel, and the first bevel gear is engaged with the second bevel gear;

tightening mechanism still includes drive assembly, drive assembly includes first gear, second gear, third gear, fourth gear, slide bar and bull stick, the bull stick rotates with the slide bar to be connected, the slide bar is along the direction of height and the fixed box sliding connection of fixed box, the one end and the first gear connection of bull stick, the other end and second gear connection, the output shaft of third gear and motor, pivot and fourth gear connection, the slide bar removes the back towards the sheath, first gear and third gear engagement, just second gear and fourth gear engagement.

Through adopting above-mentioned technical scheme, the during operation, the output shaft of motor rotates, drives first bevel gear and third gear, and first bevel gear rotates, drives second bevel gear and rotates, and second bevel gear drives the drive wheel rotation again, and then drives the piston of actuating cylinder and carry out reciprocating motion. At the moment, the sliding rod moves towards the sheath, the first gear is meshed with the third gear, the third gear drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the fourth gear to rotate, the rotating shaft is driven to rotate, the rope winding drum is convenient to wind, two functions of massaging and tightening are achieved through the motor, and energy is saved.

Optionally, an elastic part is arranged in the fixed box, one end of the elastic part is connected with one end, facing the sheath, of the sliding rod, the other end of the elastic part is connected with the bottom wall of the fixed box, and one end, far away from the elastic part, of the sliding rod extends out of the fixed box.

Through adopting above-mentioned technical scheme, the pole that slides stretches out fixed box, and the medical personnel of being convenient for press the pole that slides and tighten up in order to realize tieing the rope, and the elastic component then applys the elasticity of keeping away from the sheath direction towards the pole that slides, is convenient for loosen the pole that slides after at medical personnel, makes the pole that slides reset at once, reduces the possibility that the rope was too tightened up.

Optionally, the tightening mechanism still includes the rotation stopping subassembly, the rotation stopping subassembly includes ratchet and pawl, the ratchet is located in the pivot, the pawl passes through the dwang and is connected with the lateral wall rotation of fixed box, be equipped with the drive pawl on the dwang and towards ratchet pivoted torsion spare.

By adopting the technical scheme, after the rotating shaft stops rotating, the pawl rotates towards the ratchet wheel under the action of the torque piece, and the ratchet wheel is clamped, so that the rotating shaft is clamped, and the possibility that the tightening rope is loosened in the process that medical personnel insert the needle tube is reduced.

Optionally, a clamp for clamping the blood vessel is arranged on the sheath.

By adopting the technical scheme, the clamp is convenient for clamping the blood path tube, and the possibility that the blood path tube falls off in the process of turning over or moving the patient is reduced.

Optionally, a heating coil is arranged in the sheath.

By adopting the technical scheme, the heating coil is convenient for heating the arm of the patient, further promotes the blood circulation of the arm of the patient, and reduces the possibility of cold or stiffness of the arm of the patient.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the massage mechanism and the driving mechanism, the arm massage device has the effects of massaging the arm of the patient, promoting the blood circulation in the arm of the patient and further reducing the possibility of arm numbness of the patient;

2. through the setting of drive assembly and drive assembly, a motor realizes massage and tightens two functions, has reduced the waste of the energy.

Drawings

Fig. 1 is a schematic structural diagram of the whole in the embodiment of the present application.

Fig. 2 is a schematic structural view showing a driving mechanism, a massaging mechanism and a tightening device in the embodiment of the present application.

Fig. 3 is a schematic structural diagram of a drive assembly embodied in the embodiment of the present application.

Fig. 4 is a partially enlarged view of a portion a in fig. 2.

Fig. 5 is a schematic structural diagram of a rolling assembly and a rotation stopping assembly in an embodiment of the present application.

Fig. 6 is a partially enlarged view of a portion B in fig. 5.

Description of reference numerals: 1. a sheath; 2. a fixing box; 21. a limiting groove; 22. a first mounting plate; 221. a rotating shaft; 23. a second mounting plate; 3. a drive mechanism; 31. a drive wheel; 311. a drive rod; 32. a drive assembly; 321. a motor; 322. a first bevel gear; 323. a second bevel gear; 4. a massage mechanism; 41. a cylinder; 42. an air bag; 421. a fixed part; 422. an elastic portion; 43. a travel bar; 431. a sliding groove; 5. a clip; 6. tightening means; 61. tying a rope; 62. a tightening mechanism; 621. a transmission assembly; 6211. a first gear; 6212. a second gear; 6213. a third gear; 6214. a fourth gear; 6315. a slide bar; 6316. a rotating rod; 6317. a limiting plate; 6318. an elastic member; 6319. cushion blocks; 622. a winding component; 6221. a rotating shaft; 6222. a reel; 623. a rotation stopping assembly; 6231. a ratchet wheel; 6232. rotating the rod; 6233. a pawl; 6234. a torsion member; 6235. a feeler lever; 6236. turning over the rod; 6237. and a baffle plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses an auxiliary sheath for transfusion.

Referring to fig. 1, the auxiliary sheath for transfusion comprises a sheath 1, a fixing box 2 is fixedly connected to the sheath 1, the fixing box 2 is arranged at one end of the sheath 1 along the length direction of the fixing box, a blood circulation device is arranged in the fixing box 2, the blood circulation device comprises a massage mechanism 4, a driving mechanism 3 and a heating coil, and the driving mechanism 3 is used for driving the massage mechanism 4 to move. Before the patient infuses, convolute sheath 1 on patient's arm along self length direction to pass through magic subsides fixed connection with sheath 1 along self length direction's both ends, heating coil heating later, increase the temperature actuating mechanism 3 drive massage mechanism 4 motion of patient's arm, massage patient's arm, promote the blood circulation of patient's arm, reduce the possibility that patient's arm sent out numb.

One end of the sheath 1 along the width direction is fixedly connected with a clamp 5 for clamping a blood vessel, so that the possibility that a needle tube inserted into the blood vessel of a patient falls off when the patient turns over is reduced. The heating coil can be a glass fiber electric heating belt, and the heating temperature is 35 to 42 degrees, in the embodiment, 38 degrees. The heating coils are arranged along the length direction of the sheath 1, and a plurality of heating coils are arrayed along the width direction of the sheath 1.

Referring to fig. 2, the driving mechanism 3 includes a driving assembly 32 and a driving wheel 31, the driving assembly 32 includes a motor 321, a first bevel gear 322 and a second bevel gear 323, the motor 321 is fixedly connected to the bottom wall of the fixing box 2, and an output shaft of the motor 321 is coaxially fixed with the first bevel gear 322. The top wall of the inner cavity of the fixing box 2 is fixedly connected with a first mounting plate 22, the first mounting plate 22 is rotatably connected with a rotating shaft 221, a second bevel gear 323 is coaxially fixed with the rotating shaft 221, and the first bevel gear 322 is meshed with the second bevel gear 323. The driving wheel 31 is also coaxially fixed with the rotating shaft 221, so that the driving wheel 31 is driven to rotate when the motor 321 is started.

Referring to fig. 2 and 4, the massage mechanism 4 includes a cylinder 41 and air bags 42, the cylinder 41 is fixed on the bottom wall of the inner cavity of the fixing box 2, the air bags 42 are uniformly distributed in the sheath 1, the air bags 42 are divided into two groups, one group is communicated with one end of the cylinder 41 along the length direction thereof, and the other group is communicated with the other end of the cylinder 41 along the length direction thereof. A moving rod 43 is fixedly connected to a piston rod of the cylinder 41, a driving rod 311 is fixedly connected to the driving wheel 31, an axis of the driving rod 311 is parallel to but not coincident with an axis of the driving wheel 31, a sliding groove 431 is formed in the moving rod 43 along the height direction of the fixing box 2, and the driving rod 311 is located in the sliding groove 431. When the driving wheel 31 rotates, the driving rod 311 is driven to rotate around the axis of the driving wheel 31, and then the driving rod 311 drives the moving rod 43 to reciprocate along the axial direction of the cylinder 41 through the matching with the sliding groove 431, so as to drive the piston rod of the cylinder 41 to reciprocate along the axial direction of the cylinder 41, so that the alternate expansion of the two groups of air bags 42 is realized, the alternate massage to the patient is facilitated, and the massage effect is improved. The length of the sliding groove 431 is not less than twice the maximum distance between the driving rod 311 and the driving shaft, so that the possibility of interference between the driving rod 311 and the sliding groove 431 during rotation is reduced. The cross-sectional shape of the cylinder 41 may be circular, square, or fan-shaped, and may be designed according to the space of the cassette 2.

Referring to fig. 2, the airbag 42 includes a fixing portion 421 and an elastic portion 422, the fixing portion 421 is fixedly connected to the inside of the sheath 1 and is communicated with the cylinder 41 through an air tube, and the elastic portion 422 is adhered to the fixing portion 421. The fixing part 421 can be made of metal or hard plastic, the air tube can be made of soft plastic, and the elastic part 422 can be made of rubber and is hemispherical, so that the massage effect can be improved conveniently. After the air enters the air bag 42, the elastic part 422 deforms to massage the patient, and the fixing part 421 remains unchanged, so that the deformation of the elastic part 422 is stable, and the massage effect is ensured.

Referring to fig. 3, the sheath 1 is provided with the tightening device 6, the tightening device 6 includes a tightening rope 61 and a tightening mechanism 62, the tightening mechanism 62 is disposed in the fixing box 2, one end of the tightening rope 61 is fixedly connected to one end of the sheath 1, which is far away from the fixing box 2 along the length direction thereof, and the other end of the tightening rope extends into the fixing box 2 and is connected to the tightening mechanism 62. After sheath 1 ties up on patient's arm, when needing to insert the needle tubing, tightening mechanism 62 tightens up tieing rope 61, and tieing rope 61 ties up patient's arm tightly, hinders blood flow for the blood vessel that needs to be inserted the needle tubing emerges, and the medical personnel of being convenient for accomplish the contact pin.

Referring to fig. 4 and 5, the tightening mechanism 62 includes a transmission assembly 621 and a winding assembly 622, the transmission assembly 621 includes a first gear 6211, a second gear 6212, a third gear 6213, a fourth gear 6214, a sliding rod 6315 and a rotating rod 6316, the sliding rod 6315 is disposed along the height direction of the fixing box 2, a limiting plate 6317 is fixedly connected to the sliding rod 6315, a limiting groove 21 is formed in the fixing groove along the vertical direction, and the limiting plate 6317 is connected to the side wall of the limiting groove 21 in a sliding manner. The width of limiting plate 6317 is equal to that of limiting groove 21, reduces the possibility that sliding rod 6315 rotates and fixes, and limiting plate 6317 also reduces the possibility that sliding rod 6315 breaks away from fixed box 2.

An elastic piece 6318 is bonded to one end of the sliding rod 6315 facing the sheath 1, a pad 6319 is fixedly connected to the bottom wall of the inner cavity of the fixing box 2, one end of the elastic piece 6318 far away from the sliding rod 6315 is bonded to the rotating rod 6316 and the pad 6319, and the elastic piece 6318 may be a compression spring. One end of the sliding rod 6315, which is far away from the sheath 1, penetrates out of the fixing box 2, so as to be pressed conveniently. The sliding rod 6315 is rotatably connected to the rotating rod 6316, the rotating rod 6316 is disposed along the length direction of the fixing box 2, one end of the rotating rod 6316 is coaxially fixed to the first gear 6211, and the other end thereof is coaxially fixed to the second gear 6212. The third gear 6213 is coaxially fixed to the output shaft of the motor 321, the axis of the third gear 6213 is aligned with the axis of the first gear 6211 in the height direction of the fixing case 2, and the slide lever 6315 slides while the first gear 6211 is engaged with the third gear 6213. When the motor 321 is started, the third gear 6213 is also driven to rotate, the third gear 6213 drives the first gear 6211 to rotate, and the first gear 6211 drives the rotating rod 6316 and the second gear 6212 to rotate.

Referring to fig. 4 and 5, the winding assembly 622 includes a rotating shaft 6221 and a winding drum 6222, a second mounting plate 23 is fixedly connected to the top wall of the inner cavity of the fixed box 2, the second mounting plate 23 is rotatably connected to the rotating shaft 6221, and the rotating shaft 6221 is coaxial with the output shaft of the motor 321. The rotating shaft 6221 is coaxially fixed to the fourth gear 6214, and when the first gear 6211 is engaged with the third gear 6213, the second gear 6212 is also engaged with the fourth gear 6214. The winding drum 6222 is coaxially fixed with the rotating shaft 6221, and one end of the tie line 61 far away from the sheath 1 is fixedly connected with the drum surface of the winding drum 6222. When the tightening rope 61 needs to be tightened, the sliding rod 6315 moves towards the sheath 1, so that the first gear 6211 is engaged with the third gear 6213, the second gear 6212 is engaged with the fourth gear 6214, at this time, the motor 321 is started to drive the second gear 6212 to rotate, the second gear 6212 drives the fourth gear 6214 to rotate, the rotating shaft 6221 and the winding drum 6222 are driven to rotate, and the tightening rope 61 is wound on the winding drum 6222.

Referring to fig. 5 and 6, the tightening mechanism 62 further includes a rotation stopping assembly 623, the rotation stopping assembly 623 includes a ratchet 6231, a rotating rod 6232 and a pawl 6233, the ratchet 6231 is coaxially fixed with the rotating shaft 6221, the rotating rod 6232 is fixedly connected with the second mounting plate 23, and the pawl 6233 is rotatably connected with the rotating rod 6232. The rotating rod 6232 is sleeved with a torsion member 6234, the torsion member 6234 may be a torsion spring, one end of the torsion member 6234 is fixedly connected to the second mounting plate 23, and the other end is fixedly connected to the pawl 6233, so that a torsion force for rotating the pawl 6233 toward the ratchet wheel 6231 is applied to the pawl 6233, so that the pawl 6233 is abutted between the ratchet teeth of the ratchet wheel 6231, the rotation of the winding drum 6222 is prevented, and the tightening rope 61 is kept in a tightened state. Still have feeler lever 6235 along the direction of height sliding connection of fixed box 2 in the roof of fixed box 2, pawl 6233 is close to one end fixedly connected with turning bar 6236 of dwang 6232, and feeler lever 6235 keeps away from the one end of sheath 1 and is located outside fixed box 2, and feeler lever 6235 is located fixed box 2 towards the one end of sheath 1, and with turning bar 6236 butt. When the tying rope 61 needs to be loosened, the feeler lever 6235 is pressed, the feeler lever 6235 presses the toggle lever 6236, the pawl 6233 is lifted, and then the tying rope 61 can be loosened. A baffle 6237 is fixedly connected to the feeler lever 6235, and the baffle 6237 is located inside the stationary box 2 to reduce the possibility that the feeler lever 6235 is detached from the stationary box 2.

The implementation process of the auxiliary sheath for infusion in the embodiment of the application is as follows: before the patient is infused, the sheath 1 is tied on the arm of the patient, so that the end of the sheath 1 with the clip is close to the wrist of the patient. Before inserting the needle cannula, the motor 321 is first activated, and the sliding bar 6315 is then depressed, the first gear 6211 being in mesh with the third gear 6213 and the fourth gear 6214 being in mesh with the second gear 6212. At this time, the output shaft of the motor 321 rotates to drive the third gear 6213 to rotate, the third gear 6213 drives the first gear 6211 to rotate, the first gear 6211 drives the second gear 6212 to rotate, the second gear 6212 drives the fourth gear to rotate, the fourth gear 6214 drives the rotating shaft 6221 to rotate, the rotating shaft 6221 drives the winding drum 6222 to rotate, the winding drum 6222 winds the tightening rope 61, the arm of the patient is tightened, and when the tightening degree is proper, the sliding rod 6315 is loosened. At this time, the pawl 6233 catches the ratchet 6231 under the action of the torsion element 6234, so that the medical staff can insert the needle tube into the blood vessel of the patient. After insertion is complete, the lever 6235 is depressed and the pawl 6233 is raised, at which point the cord 61 automatically unwinds under the reactive force of the arm, or manually assisted, so that the cord 61 unwinds more completely.

In the process of infusion of a patient, the heating coil heats, meanwhile, the motor 321 drives the first bevel gear 322 to rotate to drive the second bevel gear 323 to rotate, the second bevel gear 323 drives the driving wheel 31 to rotate, the driving wheel 31 drives the piston rod of the air cylinder 41 to reciprocate, the air bag 42 is driven to alternately massage, and blood circulation of the arm of the patient is promoted.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An auxiliary sheath for transfusion is characterized in that: including sheath (1), be equipped with blood circulation device on sheath (1), blood circulation device includes massage mechanism (4) and actuating mechanism (3) that are used for driving massage mechanism (4) work, massage mechanism (4) and actuating mechanism (3) are all located on sheath (1), actuating mechanism (3) are connected with massage mechanism (4).

2. An auxiliary sheath for infusion as set forth in claim 1, wherein: massage mechanism (4) are equipped with fixed box (2) including cylinder (41) and gasbag (42) on the sliding sleeve, fixed box (2) are located in cylinder (41), in the intermediate layer of sheath (1) is located in gasbag (42), gasbag (42) and cylinder (41) intercommunication.

3. An auxiliary sheath for infusion as set forth in claim 2, wherein: actuating mechanism (3) are including drive wheel (31) and drive assembly (32), drive wheel (31) rotate to be connected in fixed box (2), drive assembly (32) are located in fixed box (2), and are used for ordering about drive wheel (31) and rotate, be equipped with carriage release lever (43) on the piston rod of cylinder (41), drive wheel (31) on be equipped with actuating lever (311), the direction of height along fixed box (2) is equipped with sliding groove (431) on carriage release lever (43), actuating lever (311) are located sliding groove (431), sliding groove (431)'s length is not less than the twice of maximum distance between actuating lever (311) and drive wheel (31) axis.

4. An auxiliary sheath for infusion as set forth in claim 3, wherein: the tightening device (6) is further arranged on the sheath (1), the tightening device (6) comprises a tightening rope (61) for tightening the arm of a patient and a tightening mechanism (62) for winding the tightening rope (61), the tightening rope (61) is arranged in the sheath (1) along the length direction of the sheath (1), the tightening mechanism (62) is located in the fixing box (2), the tightening mechanism (62) is connected with one end of the tightening rope (61), and one end, far away from the tightening mechanism (62), of the tightening rope (61) is connected with the sheath (1).

5. An auxiliary sheath for infusion as set forth in claim 4, wherein: the tightening mechanism (62) comprises a winding component (622), the winding component (622) comprises a rotating shaft (6221) and a winding drum (6222), the winding drum (6222) is arranged on the rotating shaft (6221), the rotating shaft (6221) is rotatably connected with the fixed box (2), and one end of the tightening rope (61) is fixedly connected with the drum surface of the winding drum (6222).

6. An auxiliary sheath for infusion as set forth in claim 5, wherein: the driving assembly (32) comprises a motor (321), a first bevel gear (322) and a second bevel gear (323), the motor (321) is arranged on the inner wall of the fixing box (2), an output shaft of the motor (321) is connected with the first bevel gear (322), the second bevel gear (323) is connected with the driving wheel (31), and the first bevel gear (322) is meshed with the second bevel gear (323);

the tightening mechanism (62) further comprises a transmission assembly (621), the transmission assembly (621) comprises a first gear (6211), a second gear (6212), a third gear (6213), a fourth gear (6214), a sliding rod (6315) and a rotating rod (6316), the rotating rod (6316) is rotatably connected with the sliding rod (6315), the sliding rod (6315) is slidably connected with the fixed box (2) along the height direction of the fixed box (2), one end of the rotating rod (6316) is connected with the first gear (6211), the other end is connected with the second gear (6212), the third gear (6213) is connected with the output shaft of the motor (321), the rotating shaft (6221) is connected with the fourth gear (6214), after the sliding rod (6315) moves towards the sheath (1), the first gear (6211) is meshed with the third gear (6213), and the second gear (6212) is meshed with the fourth gear (6214).

7. An auxiliary sheath for infusion as set forth in claim 6, wherein: be equipped with elastic component (6318) in fixed box (2), the one end of elastic component (6318) is connected with the one end of sliding rod (6315) towards sheath (1), and the other end is connected with the diapire of fixed box (2), the one end that elastic component (6318) was kept away from in sliding rod (6315) stretches out fixed box (2).

8. An auxiliary sheath for infusion as claimed in claim 7, wherein: the tightening mechanism (62) further comprises a rotation stopping assembly (623), the rotation stopping assembly (623) comprises a ratchet wheel (6231) and a pawl (6233), the ratchet wheel (6231) is arranged on the rotating shaft (6221), the pawl (6233) is rotatably connected with the side wall of the fixed box (2) through a rotating rod (6232), and a torsion piece (6234) for driving the pawl (6233) to rotate towards the ratchet wheel (6231) is arranged on the rotating rod (6232).

9. An auxiliary sheath for infusion as set forth in claim 1, wherein: the sheath (1) is provided with a clamp (5) for clamping the blood path tube.

10. An auxiliary sheath for infusion as set forth in claim 1, wherein: the heating coil is arranged in the sheath (1).