CN113143269B

CN113143269B - Blood drawing device

Info

Publication number: CN113143269B
Application number: CN202110431398.4A
Authority: CN
Inventors: 鲁燕; 黄艳
Original assignee: Qilu Hospital of Shandong University
Current assignee: Qilu Hospital of Shandong University
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2022-09-09
Anticipated expiration: 2041-04-21
Also published as: CN113143269A

Abstract

The invention provides a blood drawing device comprising: the needle guide rail mechanism comprises a main body mechanism (100) and a working mechanism (800), wherein the main body mechanism (100) and the working mechanism (800) drive the needle guide rail (521) to rotate through a first motor (201), the height of a second rack (543) is adjusted through a third gear (542) so as to adjust the up-and-down movement of the needle guide rail (521), and then a second oil cylinder (531) drives the needle guide rail (521) to move left and right, so that the left-and-right movement, the up-and-down movement and the angle adjustment of the needle guide rail (521) can be realized. The invention can randomly adjust the up-down, front-back position and orientation angle of the needle guide rail through the working mechanism, thereby adapting to the needle insertion of users with different body types and facilitating automatic blood drawing.

Description

Blood drawing device

Technical Field

The invention relates to a blood drawing device, in particular to an automatic blood drawing device capable of automatically realizing a blood drawing function.

Technical Field

With the continuous progress of medical level, the updating iteration of medical instruments is faster and faster, and novel medical instruments are in endless, follow the trend of times, and are imperative to design and research and develop the novel medical instruments;

at present, blood drawing operation in the medical industry is basically realized manually, so that waste of human resources and time cost is caused, and the implementation of automatic blood drawing equipment is significant in order to reduce cost and improve working efficiency.

Therefore, there is an urgent need for a device capable of automatically performing a blood drawing function, so as to improve the blood drawing efficiency and reduce the blood drawing cost.

Disclosure of Invention

The invention aims to provide a device capable of automatically realizing a blood drawing function.

The invention relates to a blood drawing device, which comprises

The main body mechanism comprises a bottom plate, a first side plate, a second side plate and a elbow supporting plate, wherein the first side plate is fixedly arranged at one end of the bottom plate, the second side plate is fixedly arranged at the left end and the right end of the elbow supporting plate, and the upper end of the first side plate is connected with the lower end of the second side plate in a sliding manner;

the working mechanism drives the needle head guide rail to rotate through the first motor and drives the needle head guide rail to move up and down and left and right through the first oil cylinder and the second oil cylinder, so that the needle head guide rail can move left and right, up and down and angle adjustment can be realized;

the image acquisition module is arranged on the needle head guide rail and is used for acquiring first image information on the elbow supporting plate;

a database storing needle-out data corresponding to the second image information;

and a processor for adjusting the left and right positions, the up and down positions and the angle of the needle guide rail by the operating mechanism according to the needle output data corresponding to the second image information when the second image information is judged to match the first image information.

The invention relates to a blood drawing device, wherein the working mechanism comprises an adjusting mechanism, and the adjusting mechanism comprises: the needle head device comprises a second connecting rod, a second supporting plate, a third bevel gear, a fourth bevel gear, a first sleeve, a third supporting rod, a first telescopic rod, a fourth supporting rod, a first clamping key, a first clamping groove, a fifth bevel gear, a sixth bevel gear, a fourth connecting rod, a needle head guide rail, a fifth connecting rod, a second telescopic rod, a first guide rail, a sixth connecting rod, a first oil cylinder, a first piston rod, a first connecting rod, a second piston rod, a second oil cylinder, a third connecting rod and a fourth connecting rod;

a first motor is fixed on the bottom plate, a first motor output shaft of the first motor is in driving connection with the second connecting rod, the middle part of the second connecting rod is installed on the second supporting plate through a bearing, the lower end of the second supporting rod is fixedly connected with the bottom plate, the rear end of the second connecting rod is coaxially fixed with the front end of the third bevel gear, the third bevel gear is meshed with the fourth bevel gear, and the upper end of the fourth bevel gear is coaxially fixed with the lower end of the first sleeve;

the middle part of the first sleeve is mounted at one end of the third support rod through a bearing, the other end of the third support rod is fixedly connected with the first guide rail, a first clamping groove is formed in the inner side surface of the first sleeve along the axial direction of the first sleeve, the first telescopic rod is sleeved in the first sleeve, a first clamping key is arranged on the side surface of the first telescopic rod, and the first clamping key is arranged in the first clamping groove and can move along the first clamping groove;

the first telescopic rod is provided with an annular hole along the circumferential direction, a clamping ring is arranged in the annular hole, the clamping ring is fixedly connected with one end of a fourth supporting rod, the other end of the fourth supporting rod is fixedly connected with the first guide rail, the upper end of the first telescopic rod is coaxially fixed with the lower end of a fifth bevel gear, the fifth bevel gear is meshed with a sixth bevel gear, the rear end of the sixth bevel gear is coaxially fixed with the front end of a fourth connecting rod, and the rear end of the fourth connecting rod is fixedly connected with the front surface of the needle head guide rail;

the first oil cylinder is internally sleeved with the first piston rod capable of driving the first oil cylinder to stretch, the upper end of the first piston rod is hinged with one end of the first connecting rod, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with the right end of the second piston rod, the second piston rod is sleeved in the second oil cylinder and can be driven by the second oil cylinder to stretch, the right end of the second piston rod is hinged with one end of the third connecting rod, the other end of the third connecting rod is hinged with one end of the fourth connecting rod, and the other end of the fourth connecting rod is hinged with the upper end of the first piston rod;

one end of a fifth connecting rod is installed at the left end of the first connecting rod through a bearing, the other end of the fifth connecting rod is coaxially fixed with the front end of the sixth bevel gear, the middle of the fifth connecting rod is installed at the upper end of a second telescopic rod through a bearing, the second telescopic rod is sleeved in the first guide rail and moves along the first guide rail, the lower end of the first guide rail is installed at the front end of a third connecting rod through a bearing, and the rear end of the third connecting rod is coaxially fixed with the front end of the third bevel gear.

The invention relates to a blood drawing device, wherein the working mechanism further comprises a stopper;

the limiter comprises a limiter guide hole, a first electromagnet, a first spring, a second magnet, a limiter bayonet lock, a limiter clamping groove and a limiter connecting block;

the first sleeve is provided with a plurality of stopper clamping grooves along the circumferential direction;

one end of the limiter connecting block is fixedly connected with the first guide rail, a circular through hole is formed in the limiter connecting block along the axial direction of the limiter connecting block, the first sleeve is sleeved in the circular through hole, the limiter guide hole is formed in the side face of the circular through hole, the front end of the limiter guide hole is fixedly connected with one end of the first electromagnet, the other end of the first electromagnet is fixedly connected with one end of the first spring, the other end of the first spring is fixedly connected with one end of the second magnet, the other end of the second magnet is fixedly connected with one end of the limiter clamping pin, and the other end of the limiter clamping pin is opposite to the limiter clamping groove;

the invention relates to a blood drawing device, wherein the working mechanism further comprises a power mechanism and a positioning mechanism;

the power mechanism comprises a first motor, a first motor output shaft, a driving gear, a second motor output shaft, a movable sliding block and a guide rod;

the right end of the first motor is fixedly connected with the first side plate, the driving gear is sleeved on the outer side of a first motor output shaft of the first motor, and the driving gear can move along the length direction of the output shaft of the motor and synchronously rotate; the first motor drives the second connecting rod to rotate through the driving gear;

the right end of the second motor is fixedly connected with the first side plate, threads are arranged on the outer circumferential surface of a second motor output shaft of the second motor, the movable sliding block is provided with a screw hole in threaded connection with the second motor output shaft, a first clamping block is fixed at the left end of the movable sliding block, the right surface of the first clamping block can be in lap joint with the left surface of the driving gear, a second clamping block is fixed at the right end of the movable sliding block, the left surface of the second clamping block can be in lap joint with the right surface of the driving gear, the first clamping block and the second clamping block are both provided with guide holes, the guide rods are installed in the guide holes of the first clamping block and the second clamping block and can move along the guide rods, and the right end of the guide rods is fixedly connected with the first side plate;

the positioning mechanism comprises a first rack, a first additional block, a second additional block, a limiting groove, a limiting pin, a first guide hole, a third magnet, a second spring and a second electromagnet;

the driving gear can be meshed with the lower surface of the rack, and the upper surface of the rack is fixedly connected with the lower surface of the toggle supporting plate;

the second side plate is fixedly provided with the first additional block, the first additional block is transversely provided with a plurality of limiting grooves, the second additional block is arranged on the outer side of the first side plate, the second additional block is provided with a first guide hole, the first guide hole is fixedly connected with one end of a second electromagnet, the other end of the second electromagnet is fixedly connected with a second spring, the other end of the second spring is fixedly connected with one end of a third magnet, and the other end of the third magnet is fixedly connected with one end of a limiting pin.

The invention relates to a blood drawing device, wherein the working mechanism further comprises a blood drawing mechanism;

the blood drawing mechanism comprises a second gear, a seventh connecting rod, a fifth supporting rod, a seventh helical gear, an eighth helical gear, a sixth supporting rod, an eighth connecting rod, a first belt pulley, a first transmission belt, a second belt pulley, an eighth connecting rod, an eighth supporting rod, a fifth connecting rod, a sixth connecting rod, a needle head grab handle, a needle head, a needle tube, a negative pressure blood bottle and a stop valve;

the upper surface of the bottom plate is fixedly connected with one end of a fifth supporting rod, the other end of the fifth supporting rod is provided with a seventh connecting rod through a bearing, the left end of the seventh connecting rod is coaxially fixed with the right surface of a second gear, the second gear is meshed with the driving gear, the left surface of the second gear is coaxially fixed with the right end of a seventh helical gear, the seventh helical gear is meshed with an eighth helical gear, the upper end of the eighth helical gear is coaxially fixed with one end of an eighth connecting rod, the eighth connecting rod is arranged on a sixth supporting rod through a bearing, the left end of the sixth supporting rod is fixedly connected with the first side plate, the upper end of the eighth connecting rod is coaxially fixed with a first belt pulley, the first belt pulley is in belt transmission with a second belt pulley through a first transmission belt, and the lower end of the second belt pulley is fixedly connected with one end of the eighth connecting rod, the eighth connecting rod other end with syringe needle guide rail fixed connection, second belt pulley upper end with eighth bracing piece one end is coaxial fixed, the eighth bracing piece with fifth connecting rod fixed connection, the fifth connecting rod other end with sixth connecting rod hinged joint, the sixth connecting rod other end with syringe needle grab handle one end hinged joint, the syringe needle grab handle other end with syringe needle side fixed connection, the syringe needle suit is in the syringe needle guide rail and can follow its removal, the syringe needle left end with needle tubing one end fixed connection and UNICOM, the needle tubing other end with negative pressure blood bottle inlet fixed connection and intercommunication, negative pressure blood bottle bottleneck position is equipped with the stop valve.

The invention relates to a blood drawing device, wherein the working mechanism further comprises a card installing mechanism;

the clamping mechanism comprises a driving tooth, a second clamping ring magnet, a clamping magnet, a second clamping ring through hole and a first pin shaft;

the lower surface of the driving tooth is meshed with the driving gear, the upper end of the driving tooth is fixedly connected with the rear end of the second clamping ring, a second clamping ring through hole is formed in the joint of the driving tooth and the second clamping ring, the first pin shaft is sleeved in the second clamping ring through hole, one end of the first pin shaft is fixedly connected with the side face of the mounting hole formed in the elbow supporting plate, the front end of the second clamping ring is fixedly mounted with a magnet of the second clamping ring, the lower surface of the magnet of the second clamping ring can be in lap joint with the upper surface of the magnet of the clamping ring, and one end of the magnet of the clamping ring is fixedly mounted on the side face of the mounting hole.

The invention relates to a blood drawing device, wherein a recess is formed in the middle of an elbow supporting plate.

According to the blood drawing device, the second clamping ring is provided with the cotton pad, and one side of the cotton pad is fixedly connected with the inner surface of the second clamping ring.

In the blood drawing device of the present invention, the first belt is passed around a tension pulley, and the tension pulley is fixed to the elbow rest via a bearing.

The invention is different from the prior art in that the working mechanism can randomly adjust the up-down, front-back position and orientation angle of the needle head guide rail, thereby being suitable for the needle insertion of users with different body types and being convenient for automatic blood drawing.

Drawings

FIG. 1 is a front view of a blood drawing device;

FIG. 2 is a partial view of one of the blood drawing devices of FIG. 1;

FIG. 3 is a partial enlarged view of the first condition of FIG. 2;

FIG. 4 is a partial enlarged view of the second condition of FIG. 2;

FIG. 5 is an isometric view of FIG. 2;

FIG. 6 is a partial view of FIG. 5;

FIG. 7 is a right side view of the blood drawing device of FIG. 1;

FIG. 8 is a partial left side view of the blood drawing device of FIG. 1;

FIG. 9 is a partial right side view of FIG. 1;

fig. 10 is a top view of the blood drawing device of fig. 1;

fig. 11 is an isometric view of the blood drawing device of fig. 1.

Detailed Description

As shown in FIGS. 1 to 9, the blood drawing device of the present invention comprises

The main body mechanism 100 comprises a bottom plate 101, a first side plate 102, a second side plate 103 and a elbow supporting plate 104, wherein the first side plate 102 is fixedly installed at one end of the bottom plate, the second side plate 103 is fixedly installed at the left end and the right end of the elbow supporting plate, and the upper end of the first side plate 102 is connected with the lower end of the second side plate 103 in a sliding manner;

the working mechanism 800 drives the needle guide rail 521 to rotate through the first motor 201, adjusts the height of the second rack 543 through the third gear 542 so as to adjust the up-and-down movement of the needle guide rail 521, and drives the needle guide rail 521 to move left and right through the second oil cylinder 531, so that the left-and-right movement, the up-and-down movement and the angle adjustment of the needle guide rail 521 can be realized;

an image acquisition module 801 arranged on the needle guide 521, for acquiring first image information on the elbow rest 104;

a database storing needle withdrawal data corresponding to the second image information;

and a processor for adjusting the left and right positions, the up and down positions, and the angle of the needle guide 521 by the operating mechanism 800 based on the needle-out data corresponding to the second image information when it is determined that the second image information matches the first image information.

The position and the angle of the needle guide rail 521 can be adjusted by the image acquisition module 801 according to the sizes and the positions of the arms of different users, so that the invention can adapt to users with different body types and different placing positions.

The invention can adjust the up-down, front-back position and orientation angle of the needle guide rail at will through the working mechanism, thereby adapting to the needle insertion of users with different body types and facilitating automatic blood drawing.

The needle output data outputted by the processor can also adjust the front and back position of the elbow supporting plate 104 through the working mechanism 800 so as to adjust the front and back, up and down, left and right positions and the inclination angle of the needle guide 521 relative to the bottom plate 101.

Wherein the base plate 101 can be placed on a table top or a table top.

Wherein, the elbow supporting plate 104 is provided with a concave in the middle position for the patient to place the arm.

The upper end of the first side plate 102 is slidably connected with the lower end of the second side plate 103, the sliding connection can be a dovetail groove mechanism 105, the dovetail groove mechanism comprises a dovetail slider and a dovetail guide rail, the dovetail slider is arranged at the lower end of the second side plate 103, and the dovetail guide rail is arranged at the upper end of the first side plate 102, so that the first side plate 102 and the second side plate 103 can only slide back and forth and cannot move left and right or up and down.

Wherein, first motor 201 has driven the rotation of the various angles of syringe needle guide rail 521, first hydro-cylinder 526 and second hydro-cylinder 531 have driven syringe needle guide rail 521 is from top to bottom about the removal to can realize syringe needle guide rail 521 about from top to bottom and angular adjustment, make the direction of syringe needle more various, nimble, increase the rate of accuracy of going out the needle, thereby can satisfy different patient's demand.

As a further explanation of the invention, with reference to figures 2, 3, 4, 5,

the working mechanism 800 includes an adjustment mechanism 500;

the adjustment mechanism 500 includes: a second connecting rod 506, a second supporting plate 507, a third bevel gear 508, a third connecting rod 509, a fourth bevel gear 510, a first sleeve 512, a third supporting rod 513, a first telescopic rod 514, a fourth supporting rod 515, a first clamping key 516, a first clamping groove 517, a fifth bevel gear 518, a sixth bevel gear 519, a fourth connecting rod 520, a needle guide 521, a fifth connecting rod 522, a second telescopic rod 523, a first guide 524, a sixth connecting rod 525, a clamping cylinder 541, a third gear 542, a second rack 543, a second guide 544, a seventh supporting rod 545, a clamping rod 546, a clamping hole 547, a poking piece 548, a clamping tooth 549, a magnet balancing weight 550, a fourth electromagnet 551, a first connecting rod 528, a second connecting rod 529, a second piston rod 530, a second oil cylinder 531, a third connecting rod 532 and a fourth connecting rod 533;

a first motor 201 is fixed on the bottom plate 101, a first motor output shaft 202 of the first motor 201 is in driving connection with the second connecting rod 506, the middle part of the second connecting rod 506 is installed on the second supporting plate 507 through a bearing, the lower end of the second supporting rod 507 is fixedly connected with the bottom plate 101, the rear end of the second connecting rod 506 is coaxially fixed with the front end of a third bevel gear 508, the third bevel gear 508 is engaged with a fourth bevel gear 510, and the upper end of the fourth bevel gear 510 is coaxially fixed with the lower end of a first sleeve 512;

the middle part of the first sleeve 512 is mounted at one end of the third support rod 513 through a bearing, the other end of the third support rod 513 is fixedly connected with the first guide rail 524, a first clamping groove 517 is formed in the inner side surface of the first sleeve 512 along the axial direction of the first sleeve, the first telescopic rod 514 is sleeved in the first sleeve 512, a first clamping key 516 is arranged on the side surface of the first telescopic rod 514, and the first clamping key 516 is arranged in the first clamping groove 517 and can move along the first clamping groove;

the first telescopic rod 514 is provided with an annular hole 534 along the circumferential direction thereof, a clamping ring 535 is configured in the annular hole, the clamping ring is fixedly connected with one end of the fourth supporting rod 515, the other end of the fourth supporting rod 515 is fixedly connected with the first guide rail 524, the upper end of the first telescopic rod 515 is coaxially fixed with the lower end of the fifth helical gear 518, the fifth helical gear 518 is meshed with the sixth helical gear 519, the rear end of the sixth helical gear 519 is coaxially fixed with the front end of the fourth connecting rod 520, and the rear end of the fourth connecting rod 520 is fixedly connected with the front surface of the needle guide rail 521;

the third bevel gear 508 is coaxially fixed to a rear end of the third connecting rod 509, a front end of the third connecting rod 509 is fitted in the clip tube 541 so as to be rotatable along the clip tube 541, a front surface of the clip tube 541 is coaxially fixed to a rear surface of the third gear 542, the third gear 542 is engaged with the second rack 543, the second rack 543 moves up and down along the second guide rail 544, and the second guide rail 544 is fixed to the base plate 101;

the top of the second rack 543 is hinged to one end of the first link 528, the other end of the first link 528 is hinged to one end of the second link 529, the other end of the second link 529 is hinged to the right end of the second piston rod 530, the second piston rod 530 is sleeved inside the second oil cylinder 531 and can be driven to extend and retract by the second piston rod, the right end of the second piston rod 530 is hinged to one end of the third link 532, the other end of the third link 532 is hinged to one end of the fourth link 533, and the other end of the fourth link 533 is hinged to the top of the second rack 543;

a seventh supporting rod 545 is fixed to the base plate 101, one side of the top of the seventh supporting rod 545, which is close to the third gear 542, is hinged to the middle of the clamping rod 546, a plurality of engaging holes 547 are formed in the rear surface of the engaging cylinder 541 along the circumferential direction thereof, one end of the engaging rod 546 can be disposed outside or inside the engaging holes 547, the other end of the clamping rod 546 is fixed to the magnet weight block 550, the magnet weight block 550 can be connected to one end of the pulling piece 548, the other end of the poking sheet 548 is fixed with the surface of the clamping cylinder 541, a plurality of poking sheets 548 are arranged on the surface of the clamping cylinder 541 along the circumferential direction, the third connecting rod 509 is provided with a plurality of latch 549 along the outer circumferential surface thereof, a fourth electromagnet 551 is fixed on one side of the top of the seventh supporting rod 545 away from the third gear 542, and the fourth electromagnet 551 can attract or repel the magnetic balancing weight 550;

when the poking sheet 548 is overlapped with the magnet balancing weight 550, the poking sheet 548 which is extruded and bent by the magnet balancing weight 550 can be clamped and meshed with the latch 549;

when the pulling piece 548 is not overlapped with the magnet balancing weight 550, the pulling piece 548 is not clamped and engaged with the latch 549.

The present invention can be switched between a state in which the third gear 542 is allowed to rotate along with the rotation of the third link 509 and a state in which the third gear 542 is locked at its circumferential position without being rotated at will by the repulsion and attraction of the magnet by the above-mentioned catch lever 546, so that the longitudinal position of the needle guide 521 can be controlled at will and locked after the position is adjusted, thereby adjusting the needle insertion height and angle at will.

The magnet weight 550 may be a permanent magnet, an iron block, or an electromagnet.

Wherein, the power module of the fourth electromagnet 551 and/or the magnet weight block 550 is connected with the processor or the user terminal through the wireless communication module, so as to realize the remote automatic adjustment of the attraction and repulsion of the fourth electromagnet 551 and the magnet weight block 550.

The number of the latches 549 can be the same as the number of the pull tabs 548, and the latches 549 are arranged between the two pull tabs 548.

When the magnet counterweight 550 and the fourth electromagnet 551 attract each other or do not attract or repel each other but are acted by the gravity of the magnet counterweight 550, one end of the catch rod 546 is disposed in the catch hole 547 of the catch tube 541, so as to brake the rotation of the third gear 542 to prevent the second rack 543 from moving up and down, thereby preventing the needle guide 521 from moving longitudinally; on the contrary, when the magnet weight block 550 and the fourth electromagnet 551 repel each other, the pull tab 548 of the magnet weight block 550 is squeezed and bent, so that the pull tab 548 is engaged with the latch 549, and the third gear 542 is driven to rotate by the rotation of the third connecting rod 509, so that the height of the second rack 543 is adjusted by the third gear 542, and the height of the needle guide 521 is adjusted.

The magnet weight 550 is preferably circular, so that it can easily overlap with the plurality of rotatable fingers 548 and press them to bend, so that they engage with the locking teeth 549.

One end of the third connecting rod 509 can be directly sleeved in the clamping cylinder 541, so that the third connecting rod can synchronously rotate or asynchronously rotate, the structure is simple, the cost is low, but the third gear 542 can easily move back and forth to cause connection failure.

Of course, one variation of the third connecting rod 509 could also be: the third connecting rod 509 is connected to an inner circumferential surface of the clamping cylinder 541 through a bearing, a front end of the third connecting rod 509 is fixed to an inner ring of the bearing, an outer ring of the bearing is fixed to the inner circumferential surface of the clamping cylinder 541, so that the clamping cylinder 541 can rotate along the third connecting rod 509 through the bearing, and the third gear 542 is not easily moved back and forth and is not connected to the second rack 543 to fail.

The connection manner of the second rack 543 moving up and down along the second guide rail 544 may be: the second rack 543 is provided with a dovetail slider, and the second guide rail 544 is provided with a dovetail guide groove matched with the dovetail slider in shape, so that connection failure of the second rack 543 and the second guide rail 544 is avoided.

One end of the fifth connecting rod 522 is mounted at the left end of the first connecting rod 528 through a bearing,

the other end of the fifth connecting rod 522 is coaxially fixed to the front end of the sixth helical gear 519, the middle of the fifth connecting rod 522 is mounted at the upper end of the second telescopic rod 523 through a bearing, the second telescopic rod 523 is sleeved in the first guide rail 524 and moves along the first guide rail 524, the lower end of the first guide rail 524 is mounted at the middle of the third connecting rod 509 through a bearing, and the rear end of the third connecting rod 509 is coaxially fixed to the front end of the third helical gear 508.

The first oil cylinder 526 and the second oil cylinder 531 are fixedly connected with the bottom plate 101 through the sixth connecting rod 525.

The power supply modules of the first oil cylinder 526 and the second oil cylinder 531 are fixed on the bottom plate 101, the power supply modules are connected with a processor through a wireless communication module, and the processor is connected with a user terminal, so that the first oil cylinder 526 and the second oil cylinder 531 can be adjusted in a wireless mode to adjust the up-down or left-right position of the needle guide 521.

Wherein, the first motor 201 can stop rotating under the power-off state to realize locking and limiting, thereby limiting the rotation of the needle guide rail 521.

The first telescopic rod 514 is sleeved in the first sleeve 512 and is axially fixed with the first clamping groove 517 through the first clamping key 516, so that the first sleeve 512 can drive the fifth helical gear 518 to rotate, the fifth helical gear 518 rotates and continues to drive the needle guide 521 to rotate through the fourth connecting rod 520, and thus the angle adjustment of the needle guide is realized;

the third gear 542 drives the second rack 543 to move up and down, the second cylinder 531 drives the second piston rod 530 to move left and right, and at this time, the two structures drive the first link 528, the second link 529, the third link 532 and the fourth link 533 to move up and down, left and right;

when the second rack 543 moves up and down, the fifth connecting rod 522 is driven to move up and down, so that the needle guide 521 moves up and down, at this time, the fifth connecting rod 522 simultaneously drives the second telescopic rod 523 to move up and down, and the second telescopic rod 523 drives the first telescopic rod 514 to move up and down through the fourth supporting rod 515, so that the fifth helical gear 518 and the sixth helical gear 519 are ensured to be engaged all the time;

meanwhile, the left and right movement of the second piston rod 530 drives the left and right movement of the fifth link 522, thereby driving the forward and backward movement of the needle guide 521.

Therefore, the angle rotation of the needle head guide rail 521 can be realized through the adjusting mechanism 500, and the up-down and left-right movement of the needle head guide rail 521 can be realized at the same time, so that the adjustment of the up-down, left-right and angle of the needle head guide rail 521 can be ensured, and the requirement of different patients can be met by the needle outlet.

As a further explanation of the invention, with reference to figures 5, 6,

the working mechanism 800 further comprises a stopper 511;

the limiter 511 comprises a limiter guide hole 701, a first electromagnet 702, a first spring 703, a second magnet 704, a limiter bayonet lock 705, a limiter bayonet lock 706 and a limiter connecting block 707;

the first sleeve 512 is provided with a plurality of stopper slots 706 along the circumferential direction;

one end of the stopper connecting block 707 is fixedly connected with the first guide rail 524, the stopper connecting block 707 is provided with a circular through hole 708 along the axial direction thereof, the first sleeve 512 is sleeved in the circular through hole 708, the stopper guide hole 701 is arranged on the side surface of the circular through hole 708, the front end of the stopper guide hole 701 is fixedly connected with one end of the first electromagnet 702, the other end of the first electromagnet 702 is fixedly connected with one end of the first spring 703, the other end of the first spring 703 is fixedly connected with one end of the second magnet 704, the other end of the second magnet 704 is fixedly connected with one end of a stopper clamping pin 705, and the other end of the stopper clamping pin 705 is opposite to the stopper clamping groove 706;

the power module of the first electromagnet iron 702 is fixed on the bottom plate 101, the power module is connected with a processor through a wireless communication module, and the processor is connected with a user terminal, so that the attraction and repulsion of the first electromagnet iron 702 and the second magnet 704 are wirelessly adjusted, and the stopper bayonet 705 is driven to stretch.

Wherein the retainer detents 705 are configured to pass into the retainer detents 706 to limit the continued rotation of the first sleeve 512.

When the first sleeve 512 and the stopper 511 rotate relatively, the first electromagnet 702 and the second magnet 704 attract each other, the stopper locking pin 705 is located in the stopper guide hole 701, and when the first sleeve 512 and the stopper 511 do not rotate relatively, the first electromagnet 702 and the second magnet 704 repel each other, the stopper locking pin 705 extends out of the stopper guide hole 701 and penetrates into the stopper locking slot 706, so that the relative rotation of the first sleeve 512 and the stopper 511 is limited.

Since the stop 511 is able to limit the continued rotation of the first sleeve 512, after the angular adjustment of the needle guide 521 is completed, the stop 511 locks the first sleeve 512, preventing the needle guide 521 from continuing to rotate.

For a further explanation of the invention, reference is made to figures 1, 7 and 8,

the invention relates to a blood drawing device, wherein the working mechanism 800 also comprises a power mechanism 200 and a positioning mechanism 400;

the power mechanism 200 comprises a first motor 201, a first motor output shaft 202, a driving gear 203, a second motor 204, a second motor output shaft 205, a movable sliding block 206 and a guide rod 209;

the right end of the first motor 201 is fixedly connected with the first side plate 102, the driving gear 203 is sleeved outside a first motor output shaft 202 of the first motor 201, and the driving gear 203 can move along the length direction of the output shaft of the motor and synchronously rotate; the first motor 201 drives the second connecting rod 506 to rotate through the driving gear 203;

the right end of the second motor 204 is fixedly connected with the first side plate 102, the outer circumferential surface of a second motor output shaft 205 of the second motor 204 is provided with a screw thread, the movable slider 206 is provided with a screw hole 210 in threaded connection with the second motor output shaft 205, the left end of the movable slider 206 is fixed with a first clamping block 207, the right surface of the first clamping block 207 can be lapped with the left surface of the driving gear 203, the right end of the movable slider 206 is fixed with a second clamping block 208, the left surface of the second clamping block 208 can be lapped with the right surface of the driving gear 203, both the first clamping block 207 and the second clamping block 208 are provided with guide holes 211, the guide rods 209 are installed in the guide holes 211 of the first clamping block 207 and the second clamping block 208 and can move along the guide rods, and the right end of the guide rod 209 is fixedly connected with the first side plate 102;

the upper surface of the bottom plate 101 is fixedly connected with the lower end of a first support rod 504, the upper part of the first support rod 504 is connected with a first connecting rod 503 through a bearing, the right end of the first connecting rod 503 is coaxially fixed with the left surface of the first gear 501, the right surface of the first gear 501 is coaxially fixed with the left end of the first bevel gear 502, the first bevel gear 502 is engaged with the second bevel gear 505, and the front end of the second bevel gear 505 is coaxially fixed with the rear end of the second connecting rod 506;

the first motor 201 drives the first gear 501 to rotate through the first motor output shaft 202 and the driving gear 203, so as to drive the first bevel gear 502 to rotate, at this time, due to the meshing of the first bevel gear 502 and the second bevel gear 505, the first bevel gear 502 drives the second bevel gear 505 to synchronously rotate, and at this time, the second bevel gear 505 drives the second connecting rod 506 to rotate.

The outer circumferential surface of the first motor output shaft 202 of the first motor 201 can be provided with a key along the length direction thereof, and the inner circumferential surface of the driving gear 203 is provided with a key groove matched with the key.

Of course, one variation of the first motor output shaft 202 may also be: the cross section of the first motor output shaft 202 of the first motor 201 can be polygonal, and a polygonal hole matched with the first motor output shaft 202 is formed inside the driving gear 203.

Of course, one variation of the first motor output shaft 202 may also be: the side surface of the first motor output shaft 202 is provided with external teeth, and the inner side of the driving gear 203 is provided with internal teeth matched with the external teeth of the first motor output shaft 202

The first motor 201 drives the first motor output shaft 202 to rotate, so as to drive the driving gear 203 to rotate, and the first motor 201 can rotate forward and backward, so as to realize forward rotation and backward rotation of the driving gear 203.

Wherein the driving gear 203 can slide left and right relative to the first motor output shaft 202.

Wherein, the left end of the first motor output shaft 202 is mounted on the first side plate through a bearing.

Because the second motor output shaft 205 is in threaded connection with the moving slider 206, and the guide rod 209 is installed in the guide holes 211 of the first fixture block 207 and the second fixture block 208, and the rotation of the moving slider 206 is limited, the second motor 204 drives the second motor output shaft 205 to rotate, so that the moving slider 206 can move left and right, and meanwhile, under the limiting action of the first fixture block 207 and the second fixture block 208, the moving slider 206 drives the driving gear 203 to move synchronously, so that the position of the driving gear 203 is controlled, and then the rotation of the driving gear 203 is controlled by the first motor 201, so that the movement of each mechanism is realized.

The invention relates to a blood drawing device, wherein a positioning mechanism 400 comprises a first rack 401, a first additional block 402, a second additional block 403, a limiting groove 404, a limiting pin 405, a first guide hole 406, a third magnet 407, a second spring 408 and a second electromagnet 409;

the driving gear 203 can be meshed with the lower surface of the rack 401, and the upper surface of the rack 401 is fixedly connected with the lower surface of the elbow supporting plate 104;

the first additional block 402 is fixedly mounted on the outer side of the second side plate 103, the first additional block 402 is transversely provided with a plurality of limiting grooves 404, the second additional block 403 is mounted on the outer side of the first side plate 102, the second additional block 403 is provided with a first guide hole 406, the first guide hole 406 is fixedly connected with one end of the second electromagnet 409, the other end of the second electromagnet 409 is fixedly connected with the second spring 408, the other end of the second spring 408 is fixedly connected with one end of the third magnet 407, and the other end of the third magnet 407 is fixedly connected with one end of the limiting pin 405.

Wherein, the limiting pin 405 can penetrate into the limiting groove 404 and move along the limiting groove.

Wherein the driving gear 203 is engaged with the lower surface of the rack 401, the first motor 201 drives the driving gear 203 to rotate through the first motor output shaft 202, and the rack 401 drives the elbow supporting plate 104 to slide back and forth due to the sliding connection between the second side plate 103 and the first side plate 102, thereby realizing the back and forth movement of the arm of the patient relative to the adjusting mechanism 500.

When the elbow supporting plate 104 slides to a proper position, the second electromagnet 409 and the third magnet 407 repel each other, and under the action of the second spring 408, the limit pin 405 springs out of the first guide hole 406, and the limit pin 405 penetrates into the limit groove 404 to prevent the first side plate 102 and the second side plate 103 from sliding relatively, and when the elbow supporting plate 104 slides, the second electromagnet 409 and the third magnet 407 attract each other to compress the second spring 408, so that the limit pin 405 is located in the first guide hole 406, and the first side plate 102 and the second side plate 103 can slide relatively.

The power module of the second electromagnet 409 is fixed on the bottom plate 101, the power module is connected with a processor through a wireless communication module, and the processor is connected with a user terminal, so that mutual attraction and repulsion of the second electromagnet 409 and the third magnet 407 are adjusted wirelessly.

For a further explanation of the invention, reference is made to figures 1 and 10,

the invention relates to a blood drawing device, wherein the working mechanism 800 further comprises a blood drawing mechanism 600;

the blood drawing mechanism 600 comprises a second gear 601, a seventh connecting rod 602, a fifth supporting rod 603, a seventh bevel gear 604, an eighth bevel gear 605, a sixth supporting rod 606, an eighth connecting rod 607, a first belt pulley 608, a first transmission belt 618, a second belt pulley 609, an eighth connecting rod 610, an eighth supporting rod 611, a fifth connecting rod 612, a sixth connecting rod 613, a needle handle 614, a needle 615, a needle tube 616, a negative pressure blood bottle 617 and a stop valve 620;

the upper surface of the bottom plate 101 is fixedly connected with one end of the fifth supporting rod 603, the other end of the fifth supporting rod 603 is provided with the seventh connecting rod 602 through a bearing, the left end of the seventh connecting rod 602 is coaxially fixed with the right surface of the second gear 601, the second gear 601 is meshed with the driving gear 203, the left surface of the second gear 601 is coaxially fixed with the right end of the seventh helical gear 604, the seventh helical gear 604 is meshed with the eighth helical gear 605, the upper end of the eighth helical gear 605 is coaxially fixed with one end of the eighth connecting rod 607, the eighth connecting rod 607 is arranged on the sixth supporting rod 606 through a bearing, the left end of the sixth supporting rod 606 is fixedly connected with the first side plate 102, the upper end of the eighth connecting rod 607 is coaxially fixed with the first belt pulley 608, the first belt pulley 608 is in belt transmission with the second belt pulley 609 through the first transmission belt 618, the lower end of the second belt pulley 609 is fixedly connected with one end of an eighth connecting rod 610, the other end of the eighth connecting rod 610 is fixedly connected with the needle guide rail 521, the upper end of the second belt pulley 609 is coaxially fixed with one end of an eighth supporting rod 611, the eighth supporting rod 611 is fixedly connected with a fifth connecting rod 612, the other end of the fifth connecting rod 612 is hinged with a sixth connecting rod 613, the other end of the sixth connecting rod 613 is hinged with one end of a needle grab handle 614, the other end of the needle grab handle 614 is fixedly connected with the side surface of a needle 615, the needle 615 is sleeved in the needle guide rail 521 and can move along the needle guide rail 521, the left end of the needle 615 is fixedly connected and communicated with one end of a needle tube 616, and the other end of the needle tube 616 is fixedly connected and communicated with a liquid inlet of a negative pressure blood bottle 617,

the stop valve 620 is arranged at the opening position of the negative pressure blood bottle 617.

Wherein the needle 615 and the needle tube 616 are tubular.

The negative pressure blood bottle 617 and the stop valve 620 are in the prior art, wherein the negative pressure blood bottle 617 can be pressed to form a negative pressure in the inner cavity of the negative pressure blood bottle 617 under the driving force of restoring the original shape, and the stop valve 620 can be a clamp.

Wherein the second gear 601 is capable of meshing with the drive gear 203.

Wherein the first belt 618 is always under tension, which enables the synchronous rotation of the first pulley 608 and the second pulley 608.

Before the blood is drawn, the negative pressure blood bottle 617 is kept in a vacuum state, the stop valve 620 is opened, blood automatically flows into the negative pressure blood bottle 617 under the negative pressure effect, and blood collection is finished.

The driving gear 203 drives the second gear 601 and the seventh bevel gear 604 to rotate synchronously, the seventh bevel gear 604 drives the eighth bevel gear 605, the eighth connecting rod 607 and the first belt pulley 608 to rotate, the first belt pulley 608 drives the second belt pulley 609 and the eighth supporting rod 611 to rotate through the first driving belt 618, and at this time, the eighth supporting rod 611 drives the needle 615 to slide in the needle guide rail 521 through the fifth connecting rod 612 and the sixth connecting rod 613, so that the needle 615 can be inserted and extracted.

When the needle 615 is inserted, the stop valve is opened, blood flows into the negative pressure blood bottle 617 through the needle tube 616 under the negative pressure effect, the stop valve is closed after blood collection is completed, and finally the needle is pulled out to complete the whole blood drawing process.

For a further explanation of the invention, reference is made to figures 1, 9 and 10,

the invention relates to a blood drawing device, wherein the working mechanism 800 further comprises a card loading mechanism 300;

the card installing mechanism 300 comprises a driving tooth 301, a second clamping ring 302, a second clamping ring magnet 303, a card installing magnet 304, a second clamping ring through hole 305 and a first pin 306;

drive tooth 301 lower surface with drive gear 203 meshes, drive tooth 301 upper end with second snap ring 302 rear end fixed connection, drive tooth 301 with second snap ring 302's junction has seted up second snap ring through-hole 305, second snap ring through-hole 305 endotheca is equipped with first round pin axle 306, first round pin axle 306 one end with set up in the side fixed connection of the mounting hole 307 on the elbow layer board 104, second snap ring 302 front end fixed mounting have second snap ring magnet 303, the lower surface of second snap ring magnet 303 can with dress card magnet 304's upper surface overlap joint, dress card magnet 304 one end fixed mounting be in the side of mounting hole 307.

The middle position of the second clamp ring 302 is in the shape of an arc, so that the second clamp ring can be conveniently lapped with the arm of a patient, and the arm can be fixed.

Wherein the second clasp magnet 303 and the chucking magnet 304 can be attracted when they are close to each other.

Wherein, drive gear 203 moves to dress card mechanism 300 position, drive gear 203 with drive gear 301 meshing, work as first motor 201 drives through first motor output shaft 202 during drive gear 203 anticlockwise rotation, drive gear 301 can drive second snap ring 302 with first round pin axle 306 is the clockwise rotation as the centre of a circle, makes second snap ring magnet 303 with dress card magnet 304 is close to each other and inhales tightly, works as first motor 201 drives through first motor output shaft 202 during drive gear 301 clockwise rotation, drive gear 301 can drive second snap ring 302 with first round pin axle 306 is the anticlockwise rotation as the centre of a circle, makes second snap ring magnet 303 with dress card magnet 304 alternate segregation, the second snap ring is reopened.

As a further explanation of the invention, with reference to figure 11,

the invention relates to a blood drawing device, wherein a depression is arranged in the middle of an elbow supporting plate 104.

Wherein, the arrangement of the sunken part can better fix the arm of the patient.

For a further explanation of the invention, reference is made to FIG. 7

According to the blood drawing device, the second clamping ring 302 is provided with a cotton pad, and one side of the cotton pad is fixedly connected with the inner surface of the second clamping ring 302.

Wherein, the second snap ring 302 is provided with a cotton pad inside, which can make the arm of the patient more comfortable in the fixing process.

For a further explanation of the invention, reference is made to FIG. 7

In the blood drawing device of the present invention, the first driving belt 618 is passed around a tension pulley, and the tension pulley is fixed to the elbow rest plate 104 by a bearing.

The first transmission belt 618 is wound around the tension wheel, so that the first pulley 608 and the second pulley 609 are always in a tensioned state, and synchronous rotation is ensured.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. A blood drawing device, comprising:

the main body mechanism (100) comprises a bottom plate (101), a first side plate (102), a second side plate (103) and a elbow supporting plate (104), wherein the first side plate (102) is fixedly installed at one end of the bottom plate, the second side plate (103) is fixedly installed at the left end and the right end of the elbow supporting plate, and the upper end of the first side plate (102) is connected with the lower end of the second side plate (103) in a sliding mode;

the working mechanism (800) drives the needle guide rail (521) to rotate through the first motor (201), adjusts the height of the second rack (543) through the third gear (542) so as to adjust the up-and-down movement of the needle guide rail (521), and drives the needle guide rail (521) to move left and right through the second oil cylinder (531), so that the left-and-right movement, the up-and-down movement and the angle adjustment of the needle guide rail (521) can be realized;

the working mechanism (800) comprises an adjustment mechanism (500), the adjustment mechanism (500) comprising: second connecting rod (506), second supporting plate (507), third bevel gear (508), third connecting rod (509), fourth helical gear (510), first sleeve (512), third supporting rod (513), first telescopic rod (514), fourth supporting rod (515), first clamping key (516), first clamping groove (517), fifth helical gear (518), sixth helical gear (519), fourth connecting rod (520), needle guide rail (521), fifth connecting rod (522), second telescopic rod (523), first guide rail (524), sixth connecting rod (525), clamping cylinder (541), third gear (542), second rack (543), second guide rail (544), seventh supporting rod (545), clamping rod (546), clamping hole (547), shifting sheet (548), clamping tooth (549), balancing weight (550), fourth electromagnet (551), first connecting rod (528), second connecting rod (529) A second piston rod (530), a second oil cylinder (531), a third connecting rod (532) and a fourth connecting rod (533);

a first motor (201) is fixed on the bottom plate (101), a first motor output shaft (202) of the first motor (201) is in driving connection with the second connecting rod (506), the middle part of the second connecting rod (506) is installed on the second supporting plate (507) through a bearing, the lower end of the second supporting rod (507) is fixedly connected with the bottom plate (101), the rear end of the second connecting rod (506) is coaxially fixed with the front end of the third helical gear (508), the third helical gear (508) is meshed with the fourth helical gear (510), and the upper end of the fourth helical gear (510) is coaxially fixed with the lower end of the first sleeve (512);

the middle of the first sleeve (512) is mounted at one end of a third support rod (513) through a bearing, the other end of the third support rod (513) is fixedly connected with the first guide rail (524), a first clamping groove (517) is formed in the inner side surface of the first sleeve (512) along the axial direction of the first sleeve, the first telescopic rod (514) is sleeved in the first sleeve (512), a first clamping key (516) is arranged on the side surface of the first telescopic rod (514), and the first clamping key (516) is configured in the first clamping groove (517) and can move along the first clamping groove;

an annular hole (534) is formed in the first telescopic rod (514) along the circumferential direction of the first telescopic rod, a clamping ring (535) is arranged in the annular hole, the clamping ring is fixedly connected with one end of a fourth supporting rod (515), the other end of the fourth supporting rod (515) is fixedly connected with the first guide rail (524), the upper end of the first telescopic rod (515) is coaxially fixed with the lower end of a fifth bevel gear (518), the fifth bevel gear (518) is meshed with a sixth bevel gear (519), the rear end of the sixth bevel gear (519) is coaxially fixed with the front end of a fourth connecting rod (520), and the rear end of the fourth connecting rod (520) is fixedly connected with the front surface of the needle head guide rail (521);

the third bevel gear (508) is coaxially fixed with the rear end of the third connecting rod (509), the front end of the third connecting rod (509) is sleeved in the clamping cylinder (541) and can rotate along the clamping cylinder, the front surface of the clamping cylinder (541) is coaxially fixed with the rear surface of the third gear (542), the third gear (542) is meshed with the second rack (543), the second rack (543) moves up and down along the second guide rail (544), and the second guide rail (544) is fixed with the bottom plate (101);

the top of the second rack (543) is hinged to one end of the first connecting rod (528), the other end of the first connecting rod (528) is hinged to one end of the second connecting rod (529), the other end of the second connecting rod (529) is hinged to the right end of the second piston rod (530), the second piston rod (530) is sleeved inside the second oil cylinder (531) and can be driven to stretch, the right end of the second piston rod (530) is hinged to one end of the third connecting rod (532), the other end of the third connecting rod (532) is hinged to one end of the fourth connecting rod (533), and the other end of the fourth connecting rod (533) is hinged to the top of the second rack (543);

a seventh supporting rod (545) is fixed on the bottom plate (101), one side of the top of the seventh supporting rod (545) close to the third gear (542) is hinged to the middle of the clamping rod (546), a plurality of clamping holes (547) are formed in the rear surface of the clamping cylinder (541) along the circumferential direction of the clamping rod, one end of the clamping rod (546) can be arranged outside or inside the clamping holes (547), the other end of the clamping rod (546) is fixed to the magnet balancing weight (550), the magnet balancing weight (550) can be in lap joint with one end of the shifting piece (548), the other end of the shifting piece (548) is fixed to the surface of the clamping cylinder (541), a plurality of shifting pieces (548) are arranged on the surface of the clamping cylinder (541) along the circumferential direction of the clamping cylinder, a plurality of clamping teeth (549) are arranged on the third connecting rod (509) along the circumferential direction of the third connecting rod, a fourth electromagnet (551) is fixed to one side, far away from the third gear (542), of the top of the seventh supporting rod (545), the fourth electromagnet (551) can attract or repel the magnet balancing weight (550);

when the poking sheet (548) is overlapped with the magnet balancing weight (550), the poking sheet (548) which is extruded and bent by the magnet balancing weight (550) can be clamped and meshed with the latch (549);

when the poking piece (548) is not overlapped with the magnet balancing weight (550), the poking piece (548) is not clamped and meshed with the clamping tooth (549);

fifth connecting rod (522) one end is passed through the bearing and is installed first connecting rod (528) left end, fifth connecting rod (522) other end with sixth helical gear (519) front end coaxial fastening, fifth connecting rod (522) middle part is passed through the bearing and is installed second telescopic link (523) upper end, second telescopic link (523) suit is in first guide rail (524) and move along it, first guide rail (524) lower extreme is installed through the bearing third connecting rod (509) middle part, third connecting rod (509) rear end with third helical gear (508) front end coaxial fastening.

2. A blood drawing device as claimed in claim 1, wherein:

the working mechanism (800) further comprises a stopper (511);

the limiter (511) comprises a limiter guide hole (701), a first electromagnet (702), a first spring (703), a second magnet (704), a limiter clamping pin (705), a limiter clamping slot (706) and a limiter connecting block (707);

the first sleeve (512) is provided with a plurality of stopper clamping grooves (706) along the circumferential direction;

one end of the stopper connecting block (707) is fixedly connected with the first guide rail (524), a circular through hole (708) is formed in the stopper connecting block (707) along the axial direction of the stopper connecting block, the first sleeve (512) is sleeved in the circular through hole (708), the stopper guide hole (701) is formed in the side face of the circular through hole (708), the front end of the stopper guide hole (701) is fixedly connected with one end of the first electromagnet (702), the other end of the first electromagnet (702) is fixedly connected with one end of the first spring (703), the other end of the first spring (703) is fixedly connected with one end of the second magnet (704), the other end of the second magnet (704) is fixedly connected with one end of the stopper clamping pin (705), and the other end of the stopper clamping pin (705) is over against the stopper clamping groove (706).

3. A blood drawing device according to claim 2 wherein:

the working mechanism (800) further comprises a power mechanism (200) and a positioning mechanism (400);

the power mechanism (200) comprises a first motor (201), a first motor output shaft (202), a driving gear (203), a second motor (204), a second motor output shaft (205), a movable sliding block (206) and a guide rod (209);

the right end of the first motor (201) is fixedly connected with the first side plate (102), the driving gear (203) is sleeved on the outer side of a first motor output shaft (202) of the first motor (201), and the driving gear (203) can move along the length direction of the output shaft of the motor and synchronously rotate; the first motor (201) drives the second connecting rod (506) to rotate through the driving gear (203);

the right end of the second motor (204) is fixedly connected with the first side plate (102), the outer circumferential surface of a second motor output shaft (205) of the second motor (204) is provided with threads, the movable sliding block (206) is provided with a screw hole (210) in threaded connection with the second motor output shaft (205), the left end of the movable sliding block (206) is fixedly provided with a first clamping block (207), the right surface of the first clamping block (207) can be lapped with the left surface of the driving gear (203), the right end of the movable sliding block (206) is fixedly provided with a second clamping block (208), the left surface of the second clamping block (208) can be lapped with the right surface of the driving gear (203), the first clamping block (207) and the second clamping block (208) are both provided with guide holes (211), and the guide rods (209) are installed in the guide holes (211) of the first clamping block (207) and the second clamping block (208), the right end of the guide rod (209) is fixedly connected with the first side plate (102);

the positioning mechanism (400) comprises a first rack (401), a first additional block (402), a second additional block (403), a limiting groove (404), a limiting pin (405), a first guide hole (406), a third magnet (407), a second spring (408) and a second electromagnet (409);

the driving gear (203) can be meshed with the lower surface of the rack (401), and the upper surface of the rack (401) is fixedly connected with the lower surface of the elbow supporting plate (104);

the first additional block (402) is fixedly mounted on the outer side of the second side plate (103), a plurality of limiting grooves (404) are transversely formed in the first additional block (402), the second additional block (403) is mounted on the outer side of the first side plate (102), a first guide hole (406) is formed in the second additional block (403), the first guide hole (406) is fixedly connected with one end of a second electromagnet (409), the other end of the second electromagnet (409) is fixedly connected with a second spring (408), the other end of the second spring (408) is fixedly connected with one end of a third magnet (407), and the other end of the third magnet (407) is fixedly connected with one end of a limiting pin (405).

4. A blood drawing device according to claim 3 wherein:

the working mechanism (800) further comprises a blood drawing mechanism (600);

the blood drawing mechanism (600) comprises a second gear (601), a seventh connecting rod (602), a fifth supporting rod (603), a seventh bevel gear (604), an eighth bevel gear (605), a sixth supporting rod (606), an eighth connecting rod (607), a first belt pulley (608), a first transmission belt (618), a second belt pulley (609), an eighth connecting rod (610), an eighth supporting rod (611), a fifth connecting rod (612), a sixth connecting rod (613), a needle handle (614), a needle (615), a needle tube (616), a negative pressure blood bottle (617) and a stop valve (620);

the upper surface of the bottom plate (101) is fixedly connected with one end of a fifth supporting rod (603), the other end of the fifth supporting rod (603) is provided with a seventh connecting rod (602) through a bearing, the left end of the seventh connecting rod (602) is coaxially fixed with the right surface of the second gear (601), the second gear (601) is meshed with the driving gear (203), the left surface of the second gear (601) is coaxially fixed with the right end of a seventh helical gear (604), the seventh helical gear (604) is meshed with an eighth helical gear (605), the upper end of the eighth helical gear (605) is coaxially fixed with one end of an eighth connecting rod (607), the eighth connecting rod (607) is mounted on the sixth supporting rod (606) through a bearing, the left end of the sixth supporting rod (606) is fixedly connected with the first side plate (102), and the upper end of the eighth connecting rod (607) is coaxially fixed with the first belt pulley (608), the first belt pulley (608) is in belt transmission with the second belt pulley (609) through the first transmission belt (618), the lower end of the second belt pulley (609) is fixedly connected with one end of an eighth connecting rod (610), the other end of the eighth connecting rod (610) is fixedly connected with the needle guide rail (521), the upper end of the second belt pulley (609) is coaxially fixed with one end of an eighth supporting rod (611), the eighth supporting rod (611) is fixedly connected with a fifth connecting rod (612), the other end of the fifth connecting rod (612) is hinged with a sixth connecting rod (613), the other end of the sixth connecting rod (613) is hinged with one end of a needle grab handle (614), the other end of the needle grab handle (614) is fixedly connected with the side surface of the needle (615), and the needle (615) is sleeved in the needle guide rail (521) and can move along the needle guide rail, the left end of the needle head (615) is fixedly connected and communicated with one end of the needle tube (616), the other end of the needle tube (616) is fixedly connected and communicated with a liquid inlet of the negative pressure blood bottle (617), and the stop valve (620) is arranged at the position of a bottle opening of the negative pressure blood bottle (617).

5. A blood drawing device according to claim 4 wherein:

the working mechanism (800) further comprises a card loading mechanism (300);

the clamping mechanism (300) comprises a driving tooth (301), a second clamping ring (302), a second clamping ring magnet (303), a clamping magnet (304), a second clamping ring through hole (305) and a first pin shaft (306);

drive tooth (301) lower surface with drive gear (203) meshing, drive tooth (301) upper end with second snap ring (302) rear end fixed connection, drive tooth (301) with second snap ring through-hole (305) have been seted up to the junction of second snap ring (302), second snap ring through-hole (305) endotheca is equipped with first round pin axle (306), first round pin axle (306) one end with set up in the side fixed connection of mounting hole (307) on elbow layer board (104), second snap ring (302) front end fixed mounting have second snap ring magnet (303), the lower surface of second snap ring magnet (303) can with the upper surface overlap joint of dress card magnet (304), dress card magnet (304) one end fixed mounting be in the side of mounting hole (307).

6. A blood drawing device according to claim 5 wherein:

the middle part of the elbow supporting plate (104) is provided with a recess.

7. A blood drawing device according to claim 6 wherein:

the second snap ring (302) is provided with a cotton pad, and one side of the cotton pad is fixedly connected with the inner surface of the second snap ring (302).

8. A blood drawing device according to claim 7 wherein:

the first drive belt (618) passes around a tension wheel, which is fixed to the elbow rest (104) by a bearing.