阅读说明：本技术 一种血液内科专用无痕压脉血液采集辅助装置 (Special no trace of blood internal medicine is pressed arteries and veins blood and is gathered auxiliary device ) 是由 刘学辉 于 2021-08-02 设计创作，主要内容包括：本发明涉及医疗用品领域,尤其涉及一种血液内科专用无痕压脉血液采集辅助装置,包括有底板、握力组件、压脉袋收紧组件、行程增长组件等；底板上设有握力组件,底板上设有压脉袋收紧组件,握力组件上设有行程增长组件。通过充气布带,使得在对患者的手臂进行压脉的过程中患者的手臂不会产生压痕,从而可以避免患者手臂的产生皮下瘀血,进而可以防止增加患者的痛苦,达到了能够避免患者的手臂产生皮下瘀血以防止对患者造成二次伤害的效果。(The invention relates to the field of medical supplies, in particular to a traceless tourniquet blood collection auxiliary device special for a blood internal medicine, which comprises a bottom plate, a grip strength component, a tourniquet bag tightening component, a stroke increasing component and the like; the bottom plate is provided with a grip assembly, the bottom plate is provided with a pulse pressing bag tightening assembly, and the grip assembly is provided with a stroke increasing assembly. Through aerifing the strap for the in-process patient's arm that presses the arteries and veins is being carried out patient's arm can not produce the indentation, thereby can avoid the production subcutaneous stagnant blood of patient's arm, and then can prevent to increase patient's misery, has reached the effect that can avoid patient's arm to produce subcutaneous stagnant blood in order to prevent to cause secondary damage to the patient.)

1. The utility model provides a special no trace of blood internal medicine pressure arteries and veins blood collection auxiliary device which characterized in that: the pulse pressing assembly comprises a bottom plate, a grip assembly, a pulse pressing bag tightening assembly, a stroke increasing assembly, an inflatable pulse pressing assembly and a deflector rod, wherein the grip assembly is arranged on the bottom plate, the pulse pressing bag tightening assembly is arranged on the bottom plate, the stroke increasing assembly is arranged on the grip assembly, the inflatable pulse pressing assembly is arranged on the bottom plate, and the deflector rod is arranged on the pulse pressing bag tightening assembly.

2. The traceless tourniquet blood collection auxiliary device special for hematology department according to claim 1, is characterized in that: the grip assembly comprises a fixed holding rod, a holding handle, a U-shaped plate, an extrusion spring and a connecting rod, the top of the bottom plate is connected with the fixed holding rod, the holding handle is connected with the holding handle in a sliding mode and traverses the fixed holding rod, the U-shaped plate is connected onto the fixed holding rod in a connecting mode, the U-shaped plate is matched with the holding handle in a sliding mode, the extrusion spring is symmetrically connected between the U-shaped plate and the holding handle, the connecting rod is connected onto the holding handle, and the connecting rod is matched with the U-shaped plate in a sliding mode and is provided with a tooth-shaped strip.

3. The traceless tourniquet blood collection auxiliary device special for hematology department according to claim 2, is characterized in that: the tourniquet bag tightening assembly comprises a mounting seat, a mounting groove plate, a moving rod, a supporting rod, a rotating rod, an extension plate, a first overrunning clutch, a power gear, a rotating ring, a transverse rod, a bevel gear, a tightening wheel, an inflation cloth belt, a tightening belt, a first torsion spring, a fixing strip, a clamping rod, a compression spring and a fixing pull rod, wherein the mounting seat is connected to the top of a bottom plate, the mounting groove plate is connected to the mounting seat in a coupling mode, an L-shaped sliding groove is formed in the mounting groove plate, the moving rod is connected to the mounting groove plate in a sliding mode, the supporting rod is connected to the moving rod in a sliding mode, the extension plate is connected to the mounting seat in a coupling mode, the rotating ring is connected to the extension plate in a rotating mode, the rotating rod is connected to the inner side of the rotating ring in a sliding mode, the rotating rod is in contact with the supporting rod, the first overrunning clutch is connected to the first overrunning clutch, the power gear is connected to the mounting seat in a rotating mode, the transverse rod is connected to the rotating ring in a coupling mode, the bevel gear is connected to the rotating ring in a coupling mode, the horizontal rod is also connected with bevel gears, one bevel gear is in sliding fit with the rotating rod, the two bevel gears are meshed with each other, a tightening wheel is connected onto the horizontal rod, one side of the tightening wheel is provided with clamping grooves in a distributed mode, an inflatable cloth belt is connected onto the mounting seat, a tightening belt is connected onto the tightening wheel, the other end of the tightening belt is connected with the inflatable cloth belt, the tightening belt is wound onto the tightening wheel, the tightening belt is wound onto the inflatable cloth belt, a first torsion spring is connected between the tightening wheel and the mounting seat, a fixing strip is connected onto the mounting seat, a pair of clamping rods are connected onto the fixing strip in a sliding mode, the clamping rods are clamped onto the tightening wheel, one clamping rod is connected with a driving rod in a rotating mode, the driving rod is sleeved onto the inflatable cloth belt, a compression spring is connected between the clamping rods and the fixing strip, and a fixed pull rod is connected between the two clamping rods.

4. The traceless tourniquet blood collection auxiliary device special for hematology department according to claim 3, is characterized in that: the stroke increases the subassembly including the installation pole, fixed rack, remove the rack, the rotary rod, little rotary gear, rotatory gear wheel and torque spring two, the hookup has the installation pole on the grab handle, the hookup has fixed rack on the installation pole, the slidable connection has the removal rack on the installation pole, the rotatable type is connected with the rotary rod on the bottom plate, be equipped with freewheel clutch two on the rotary rod, the hookup has little rotary gear on the freewheel clutch two, little rotary gear and the meshing of fixed rack, the hookup has rotatory gear wheel on the rotary rod, rotatory gear wheel and the meshing of removal rack, be connected with torque spring two between rotatory gear wheel and the bottom plate.

5. The traceless tourniquet blood collection auxiliary device special for hematology department according to claim 4, is characterized in that: the inflatable pulse pressing assembly comprises an inflatable rod, a support, an inflator, a piston and an air outlet pipe, the inflatable rod is connected to the moving rack, the support is connected to the bottom plate, the inflator is connected to the support and connected with the inflatable rod in a sliding mode, one end of the inflatable rod is connected with the piston, the piston is made of rubber, the piston is matched with the inflator in a sliding mode, the air outlet pipe is connected to the inflator and communicated with the inflator, the air outlet pipe is connected with the mounting seat, and the air outlet pipe is communicated with the inflatable cloth belt.

Technical Field

The invention relates to the field of medical supplies, in particular to a traceless pulse pressing blood collection auxiliary device special for a blood internal medicine.

Background

The method of extracting a certain amount of venous blood through a needle tube is called venous blood sampling, before blood sampling, a patient usually needs to sit on a table, the arm of the patient is placed on the table, the palm is upward, and a pillow is placed under the arm, and because the vein on the arm of the patient is difficult to confirm, the vein on the arm of the patient needs to be pressed, so that the vein on the arm of the patient is displayed, and the subsequent blood sampling work is facilitated.

The prior art ties up patient's arm through the rubber tube hard for the vein on the patient's arm shows, then directly uses the needle utensil of drawing blood to draw blood to the patient, but current method wastes time and energy, and because the number of the people of blood sampling is many sometimes, pricks repeatedly and presses the arteries and veins area and can make operating efficiency can't obtain promoting, if the time overlength of tying up simultaneously, causes patient's arm subcutaneous blood stasis easily, thereby increases patient's misery.

Disclosure of Invention

In view of the above, it is necessary to provide a traceless pulse-pressing blood collection auxiliary device for blood medicine, which can automatically press pulse against the arm of a patient and prevent the arm of the patient from generating subcutaneous blood stasis to prevent secondary damage to the patient, so as to solve the problems of low operation efficiency and easy generation of subcutaneous blood stasis on the arm of the patient in the conventional method proposed in the background art.

The technical scheme of the invention is as follows: the utility model provides a special no trace of blood internal medicine pressure arteries and veins blood collection auxiliary device, is equipped with the grip subassembly on the bottom plate, is equipped with pressure arteries and veins bag tightening up subassembly on the bottom plate, inflates and presses arteries and veins bag tightening up subassembly and driving lever including bottom plate, grip subassembly, pressure arteries and veins bag tightening up subassembly, stroke increase subassembly on the grip subassembly, is equipped with on the bottom plate and inflates and presses arteries and veins the subassembly, presses arteries and veins bag tightening up and veins the last driving lever that is equipped with of subassembly.

Further, the grip subassembly is including fixed holding rod, grab handle, U-shaped board, extrusion spring and connecting rod, and the bottom plate top hookup has fixed holding rod, and the sliding type is connected with the grab handle on the fixed holding rod, and the grab handle crosses fixed holding rod, and the hookup has the U-shaped board on the fixed holding rod, U-shaped board and grab handle sliding type cooperation, and symmetrical connection has the extrusion spring between U-shaped board and the grab handle, and the hookup has the connecting rod on the grab handle, and connecting rod and U-shaped board sliding type cooperation are provided with the profile of tooth strip on the connecting rod.

Further, the pulse pressing bag tightening assembly comprises a mounting seat, a mounting groove plate, a moving rod, a supporting rod, a rotating rod, an extending plate, a first overrunning clutch, a power gear, a rotating ring, a transverse rod, a bevel gear, a tightening wheel, an inflation cloth belt, a tightening belt, a first torsion spring, a fixing strip, a clamping rod, a compression spring and a fixing pull rod, wherein the mounting seat is connected to the top of the bottom plate, the mounting groove plate is connected to the mounting seat, an L-shaped sliding groove is formed in the mounting groove plate, the moving rod is connected to the mounting groove plate in a sliding mode, the supporting rod is connected to the moving rod in a sliding mode, the extending plate is connected to the extending plate in a rotating mode, the rotating rod is connected to the inner side of the rotating ring in a sliding mode and is in contact with the supporting rod, the first overrunning clutch is connected to the rotating rod in a connecting mode, the power gear is connected to the first overrunning clutch in a connecting mode, the transverse rod is connected to the mounting seat in a rotating mode, the rotating ring is connected with bevel gears, the transverse rods are connected with the bevel gears in the same way, one bevel gear is in sliding fit with the rotating rod, the two bevel gears are meshed with each other, the transverse rods are connected with tightening wheels, one sides of the tightening wheels are provided with clamping grooves in a distributed mode, the mounting seat is connected with an inflatable cloth belt in a connected mode, the tightening belt is connected with a tightening belt in a connected mode, the other end of the tightening belt is connected with the inflatable cloth belt in a connected mode, the tightening belt is wound on the tightening wheels, the tightening belt is wound on the inflatable cloth belt, a torsion spring I is connected between the tightening wheels and the mounting seat, the mounting seat is connected with a fixing strip, the fixing strip is connected with a pair of clamping rods in a sliding mode, the clamping rods are clamped into the tightening wheels, one clamping rod is connected with a shifting rod in a rotating mode, the shifting rod is sleeved on the inflatable cloth belt, a compression spring is connected between the clamping rods and the fixing strip, and a fixed pull rod is connected between the two clamping rods together.

Further, the stroke increases the subassembly including the installation pole, fixed rack, remove the rack, the rotary rod, little rotary gear, rotatory gear wheel and torque spring two, the hookup has the installation pole on the grab handle, the hookup has fixed rack on the installation pole, the slidable connection has the removal rack on the installation pole, the rotation is connected with the rotary rod on the bottom plate, be equipped with freewheel clutch two on the rotary rod, the hookup has little rotary gear on the freewheel clutch two, little rotary gear and fixed rack meshing, the hookup has rotatory gear wheel on the rotary rod, rotatory gear wheel and removal rack meshing, be connected with torque spring two between rotatory gear wheel and the bottom plate.

Furthermore, the inflation pulse pressing assembly comprises an inflation rod, a support, an inflator pump, a piston and an air outlet pipe, the inflation rod is connected to the movable rack, the support is connected to the bottom plate, the inflator pump is connected to the support and is in sliding connection with the inflation rod, the piston is connected to one end of the inflation rod and is made of rubber, the piston is in sliding fit with the inflator pump, the air outlet pipe is connected to the inflator pump and is communicated with the inflator pump, the air outlet pipe is connected with the mounting seat, and the air outlet pipe is communicated with the inflation cloth belt.

The beneficial effects are that:

through the cooperation of inflator pump and the strap of aerifing and device above that for inside gas is squeezed into the strap of aerifing through the outlet duct, thereby make the strap inflation of aerifing, and then make the strap of aerifing can press the arteries and veins to patient's arm, be convenient for make patient's vein show, can carry out the follow-up operation of gathering blood afterwards, reached and to have carried out the effect of pressing the arteries and veins to patient's arm automatically.

Through aerifing the strap for the in-process patient's arm that presses the arteries and veins is being carried out patient's arm can not produce the indentation, thereby can avoid the production subcutaneous stagnant blood of patient's arm, and then can prevent to increase patient's misery, has reached the effect that can avoid patient's arm to produce subcutaneous stagnant blood in order to prevent to cause secondary damage to the patient.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a perspective view of the grip assembly of the present invention.

Fig. 4 is a schematic view of a first partially-separated body structure of the pulse pressing bag tightening assembly of the invention.

Fig. 5 is a schematic view of a second partially-separated body structure of the pulse pressing bag tightening assembly of the invention.

Fig. 6 is a schematic perspective view of a third embodiment of the fastening assembly of the tourniquet of the present invention.

Fig. 7 is a partial perspective view of the present invention.

Fig. 8 is an enlarged perspective view of the present invention a.

Fig. 9 is a partially cut-away perspective view of the inflatable tourniquet assembly of the present invention.

Fig. 10 is a schematic perspective view of the shift lever of the present invention.

Part names and serial numbers in the figure: 1_ base plate, 2_ grip element, 21_ fixed grip bar, 22_ grip handle, 23_ U-shaped plate, 24_ compressed spring, 25_ connecting rod, 3_ pulse-compression bag tightening element, 31_ mount, 32_ mounting slot plate, 33_ moving rod, 34_ support rod, 35_ rotating rod, 36_ extension plate, 37_ overrunning clutch one, 38_ power gear, 39_ rotating ring, 310_ transverse rod, 311_ bevel gear, 312_ tightening wheel, 313_ inflation strap, 314_ tightening strap, 315_ torsion spring one, 316_ fixed bar, 316_ clamping rod, 318_ compression spring, 319_ fixed pull rod, 4_ stroke increasing element, 41_ mounting rod, 42_ fixed bar, 43_ moving rack, 44_ rotating rod, 45_ overrunning clutch two, 46_ small rotating gear, 47_ rotating large gear, 48_ torsion spring two, 5_ inflation pulse-compression assembly, 51_ inflation rod, 52_ support, 53_ inflator, 54_ piston, 55_ air outlet pipe and 6_ deflector rod.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Example (b): the utility model provides a special no trace pressure arteries and veins blood collection auxiliary device of hematology department, as shown in fig. 1-10, including bottom plate 1, grip subassembly 2, pressure arteries and veins bag tightening up subassembly 3, stroke increase subassembly 4, aerify and press arteries and veins subassembly 5 and driving lever 6, be equipped with grip subassembly 2 on the bottom plate 1, be equipped with pressure arteries and veins bag tightening up subassembly 3 on the bottom plate 1, be equipped with stroke increase subassembly 4 on the grip subassembly 2, be equipped with on the bottom plate 1 and aerify and press arteries and veins subassembly 5, it is used for pressing arteries and veins to aerify pressure arteries and veins subassembly 5 to the arm of patient, be equipped with driving lever 6 on the arteries and veins bag tightening up subassembly 3, driving lever 6 is used for plugging up the aperture on the aeration strap 313.

The grip assembly 2 comprises a fixed grip 21, a grip 22, a U-shaped plate 23, an extrusion spring 24 and a connecting rod 25, the top of the bottom plate 1 is connected with the fixed grip 21, the fixed grip 21 is slidably connected with the grip 22, the grip 22 crosses the fixed grip 21, the fixed grip 21 is connected with the U-shaped plate 23, the U-shaped plate 23 is slidably matched with the grip 22, the extrusion spring 24 is symmetrically connected between the U-shaped plate 23 and the grip 22, the grip 22 of the extrusion spring 24 is used for driving the grip 22 and resetting of an upper device thereof, the connecting rod 25 is connected with the grip 22, the connecting rod 25 is used for driving the power gear 38 and rotating the upper device thereof, the connecting rod 25 is slidably matched with the U-shaped plate 23, and the connecting rod 25 is provided with a tooth-shaped strip.

The tourniquet tightening component 3 comprises a mounting seat 31, a mounting groove plate 32, a movable rod 33, a support rod 34, a rotating rod 35, an extension plate 36, an overrunning clutch I37, a power gear 38, a rotating ring 39, a transverse rod 310, a bevel gear 311, a tightening wheel 312, an inflatable cloth belt 313, a tightening belt 314, a torsion spring I315, a fixing strip 316, a clamping rod 317, a compression spring 318 and a fixing pull rod 319, wherein the top of the bottom plate 1 is connected with the mounting seat 31, the mounting groove plate 32 is connected with the mounting seat 31, an L-shaped sliding groove is arranged on the mounting groove plate 32, the movable rod 33 is connected with the mounting groove plate 32 in a sliding manner, the support rod 34 is connected with the movable rod 33 in a sliding manner, the extension plate 36 is connected with the extension plate 36 in a rotating ring 39 in a rotating manner, the rotating rod 35 is connected with the inner side of the rotating ring 39 in a sliding manner, the 35 is in contact with the support rod 34, the overrunning clutch I37 is connected with the rotating rod 35, the overrunning clutch I37 is connected with a power gear 38, the mounting seat 31 is rotatably connected with a transverse rod 310, the rotating ring 39 is connected with bevel gears 311, one bevel gear 311 drives the other bevel gear 311 and the device thereon to rotate clockwise, the transverse rod 310 is also connected with bevel gears 311, one bevel gear 311 is in sliding fit with the rotating rod 35, the two bevel gears 311 are meshed with each other, the transverse rod 310 is connected with a tightening wheel 312, the tightening wheel 312 is used for winding or unwinding a tightening belt 314, one side of the tightening wheel 312 is provided with clamping grooves in a distributed manner, the mounting seat 31 is connected with an inflatable cloth belt 313, the inflatable cloth belt 313 is used for pressing pulse on the arm of a patient, the tightening wheel 312 is connected with a tightening belt 314, the other end of the tightening belt 314 is connected with the inflatable cloth belt 313, the tightening belt 314 is wound on the tightening wheel 312, the tightening belt 314 is wound on the inflatable cloth belt 313, a torsion spring I315 is connected between the tightening wheel 312 and the mounting seat 31, the first torsion spring 315 is used for driving the tightening wheel 312 and the device thereon to reset, a fixing strip 316 is connected to the mounting seat 31, a pair of clamping rods 317 is connected to the fixing strip 316 in a sliding manner, the clamping rods 317 are clamped on the tightening wheel 312, a shift lever 6 is connected to one clamping rod 317 in a rotating manner, the shift lever 6 is sleeved on the inflation cloth belt 313, a compression spring 318 is connected between the clamping rod 317 and the fixing strip 316, the tightening wheel 312 can be clamped by the clamping rods 317 through the matching of the tightening wheel 312, the clamping rods 317 and the compression spring 318, and a fixed pull rod 319 is connected between the two clamping rods 317.

The stroke lengthening assembly 4 comprises a mounting rod 41, a fixed rack 42, a movable rack 43, a rotating rod 44, a small rotating gear 46, a large rotating gear 47 and a second torsion spring 48, the mounting rod 41 is connected to the handle 22, the fixed rack 42 is connected to the mounting rod 41, the fixed rack 42 is used for driving the small rotating gear 46 and the device thereon to rotate, the moving rack 43 is connected to the mounting rod 41 in a sliding manner, the rotating rod 44 is connected to the bottom plate 1 in a rotating manner, an overrunning clutch II 45 is arranged on the rotating rod 44, the small rotating gear 46 is connected to the overrunning clutch II 45, the small rotating gear 46 is meshed with the fixed rack 42, the large rotating gear 47 is connected to the rotating rod 44, the large rotating gear 47 is used for driving the moving rack 43 and the device thereon to reciprocate, the large rotating gear 47 is meshed with the moving rack 43, and the second torsion spring 48 is connected between the large rotating gear 47 and the bottom plate 1, the second torsion spring 48 is used for driving the rotating gearwheel 47 and the devices thereon to reset.

The inflation and pulse-pressing assembly 5 comprises an inflation rod 51, a support 52, an inflator 53, a piston 54 and an air outlet pipe 55, the inflation rod 51 is connected to the movable rack 43, the support 52 is connected to the bottom plate 1, the inflator 53 is connected to the support 52, the inflator 53 is connected with the inflation rod 51 in a sliding mode, the piston 54 is connected to one end of the inflation rod 51 and matched with the inflator 53 through the piston 54, gas can be pumped into the inflation cloth belt 313 through the air outlet pipe 55, the piston 54 is made of rubber, the piston 54 is matched with the inflator 53 in a sliding mode, the air outlet pipe 55 is connected to the inflator 53, the air outlet pipe 55 is communicated with the inflator 53, the air outlet pipe 55 is connected with the mounting seat 31, and the air outlet pipe 55 is communicated with the inflation cloth belt 313.

When the device is used, firstly, the arm of a patient needing blood drawing passes through the loose inflatable cloth belt 313, the palm of the patient faces upwards, then the hand passing through the inflatable cloth belt 313 holds the holding handle 22 and the fixed holding rod 21, the holding handle 22 and the device on the holding handle move towards the direction close to the mounting seat 31, the extrusion spring 24 is compressed accordingly, the connecting rod 25 drives the power gear 38 and the device on the power gear to rotate in a clockwise manner in the process, one bevel gear 311 drives the other bevel gear 311 and the device on the bevel gear to rotate in a clockwise manner, and the torsion spring 315 is compressed accordingly, so that the tightening wheel 312 winds the tightening belt 314, and the tightening wheel 312, the clamping rod 317 and the compression spring 318 are matched, so that the clamping rod 317 can clamp the tightening wheel 312, and the tightening wheel 312 and the device on the tightening wheel 317 are prevented from resetting.

Then the handle 22 and the fixed handle 21 are released, the handle 22 and the device thereon are reset under the reset action of the extrusion spring 24, in the process, the connecting rod 25 drives the power gear 38 and the device thereon to rotate reversely, the rotating rod 35 and the device thereon cannot rotate under the action of the overrunning clutch I37, then the handle 22 and the fixed handle 21 are repeatedly held and released, according to the operation, when the tightening belt 314 is wound to a proper position, the inflation cloth belt 313 is tightly attached to the arm of the patient, and then the moving rod 33 is manually shifted, so that the moving rod 33 and the device thereon move along the chute on the mounting groove plate 32, and the rotating rod 35 and the device thereon move downwards.

During the process that the handle 22 and the device thereon move towards the direction close to the mounting seat 31, the fixed rack 42 drives the small rotating gear 46 and the device thereon to rotate forward, the torsion spring II 48 is compressed, the rotating large gear 47 drives the moving rack 43 and the device thereon to move for a longer distance, then the fixed rack 42 is separated from the small rotating gear 46, the rotating large gear 47 and the device thereon are reset in a reverse way along with the reset of the torsion spring II 48, during the process, the rotating large gear 47 drives the moving rack 43 and the device thereon to reset, then the handle 22 and the fixed handle 21 are released, the handle 22 and the device thereon are reset, the fixed rack 42 drives the small rotating gear 46 to reverse, the rotating rod 44 and the device thereon cannot rotate under the action of the overrunning clutch II 45, and during the process that the handle 22 and the fixed handle 21 are repeatedly held and then released, the piston 54 reciprocates in the inflating cylinder 53, through the cooperation of piston 54 with inflator 53 for inside gas was squeezed into through outlet duct 55 and is aerifyd strap 313, thereby make and aerify strap 313 inflation, and then make and aerify strap 313 and can press the arteries and veins to patient's arm, be convenient for make patient's vein show, can carry out the follow-up operation of gathering blood afterwards, reached and to have carried out the effect of pressing the arteries and veins to patient's arm automatically.

Through aerifing strap 313, can be so that can not produce the indentation at the in-process patient's that presses the arteries and veins arm to can avoid the production subcutaneous blood stasis of patient's arm, and then can prevent to increase patient's misery, reach the effect that can avoid patient's arm to produce subcutaneous blood stasis in order to prevent to cause the secondary damage to the patient.

After blood collection is completed, the shifting lever 6 and the device on the shifting lever are manually pulled to move, the compression spring 318 is compressed accordingly, the clamping rod 317 does not clamp the tightening wheel 312 any more, the tightening wheel 312 and the device on the tightening wheel can reset under the reset action of the first torsion spring 315, the tightening wheel 312 unreels the tightening belt 314, meanwhile, the shifting lever 6 does not block the small hole in the inflation cloth belt 313 any more, gas in the inflation cloth belt 313 flows out through the small hole in the inflation cloth belt 313, the inflation cloth belt 313 is in a loose state again, then the arm of a patient can be taken out, and finally, the shifting lever 33 is manually shifted, so that the shifting lever 33 and the device on the shifting lever are reset.

Repeating the above operations may cause the device to be reused.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.