CN109938753B

CN109938753B - Blood sampling device

Info

Publication number: CN109938753B
Application number: CN201910199872.8A
Authority: CN
Inventors: 王亚兰; 孙满云; 朱丹; 任敏
Original assignee: Second Affiliated Hospital Army Medical University
Current assignee: Second Affiliated Hospital Army Medical University
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2021-06-25
Anticipated expiration: 2039-03-15
Also published as: CN109938753A

Abstract

The invention relates to the field of medical equipment, in particular to a blood sampling device which comprises a base and a vertical plate, wherein the base is fixedly connected with the vertical plate, a plurality of placing grooves for placing blood sampling test tubes are arranged on the base, a motor is arranged on the vertical plate, a speed reducer is connected on the motor, a rotating roller is connected on the speed reducer, a plurality of groove holes are formed in the rotating roller, the plurality of groove holes are axially arranged along the rotating roller, and the projections of the plurality of groove holes in the axial direction of the rotating roller are uniformly distributed; a plurality of groups of limit buckles are arranged on the vertical plate. The scheme realizes automatic control of different pipelines.

Description

Blood sampling device

Technical Field

The invention relates to the field of medical equipment, in particular to a blood sampling device.

Background

At present, when diagnosing diseases, a patient needs to be sampled with blood, during blood sampling, medical staff pierce the needle of the blood sampling needle into the blood vessel of the patient, then take off the protective sleeve of the puncture plug end of the blood sampling needle connected through a hose, insert the puncture plug end into a blood sampling test tube by the medical staff, and realize blood sampling by means of negative pressure in the blood sampling test tube.

However, since a plurality of health indexes of a patient need to be checked, a plurality of blood samples are often required to be extracted at the same time, and therefore a plurality of blood sampling test tubes are required. Because in the process of replacing the blood sampling test tube, the needle head at the puncture plug end is exposed in the air, cross infection easily occurs, and the puncture plug end is repeatedly inserted into different blood sampling test tubes, the phenomena of needle head bending and breakage easily occur, thereby influencing the normal operation of blood sampling.

In order to solve the technical problem, the utility model with the publication number of CN203953672U discloses a multi-head blood taking needle, which comprises a needle head for taking blood, a hose and a multi-way tube, wherein one end of the hose is connected with the needle head, the other end of the hose is connected with one port of the multi-way tube, other ports of the multi-way tube are provided with a puncture plug end, and a pipeline provided with the puncture plug end is provided with a switch; by adopting the multi-head blood taking needle of the utility model, the operation flow of venous blood taking can be greatly simplified, and the pollution, bending and fracture of the puncture plug end can be effectively avoided when the vacuum tube is replaced; thereby reducing the occurrence of cross infection and needle stick injury.

But when adopting the scheme in the above-mentioned utility model, still need medical staff to carry out the switch on the different pipelines of manual regulation to whether the blood in the different pipelines of control circulates, can't realize the automatically regulated of each pipeline, the operation is more complicated. Especially when the pipeline is more, a plurality of pipelines are crisscross together to easily make medical staff distinguish which pipeline and corresponding blood sampling test tube intercommunication, when medical staff control switch easily appears, still can make the blood in the pipeline enter into the phenomenon in the blood sampling test tube of having gathered blood.

Disclosure of Invention

The invention aims to provide a blood sampling device to realize automatic control of different pipelines.

In order to achieve the purpose, the technical scheme of the invention is as follows: a blood sampling device comprises a base and a vertical plate which are fixedly connected together, wherein a plurality of placing grooves for placing blood sampling test tubes are formed in the base, a motor is mounted on the vertical plate, a speed reducer is connected onto the motor, a rotating roller is connected onto the speed reducer, a plurality of slots are formed in the rotating roller and are axially arranged along the rotating roller, and the projections of the slots in the axial direction of the rotating roller are uniformly distributed; a plurality of groups of limit buckles are arranged on the vertical plate.

The working principle of the scheme is as follows: the standing groove on the base is used for placing a plurality of blood sampling test tubes. The motor is used for driving the speed reducer to rotate, and the speed reducer is used for reducing speed, so that the rotating roller is driven to rotate slowly. When actually taking a blood sample, insert each blood sampling test tube with stinging stopper end on a plurality of pipelines in advance, then the starter motor to make the live-rollers rotate, lateral wall extrudees the pipeline when the live-rollers rotates. When the slotted hole moves to the pipeline, the rotating roller is not abutted to the pipeline any more, so that the pipeline is communicated, and when the pipeline is extruded by the rotating roller, the pipeline is blocked, so that the pipeline can be in a closed state. Because a plurality of slotted holes set up along the live-rollers axial, a plurality of slotted holes are at the projection evenly distributed of live-rollers axial direction, so a plurality of slotted holes can not coincide completely at the projection of live-rollers axial direction, at the live-rollers rotation in-process like this, each pipeline can enter into corresponding slotted hole in proper order, thereby make each pipeline open in proper order, carry blood for each blood sampling test tube in proper order, and when new pipeline is opened, other pipeline is in the state of closing by the live-rollers extrusion, guaranteed that only a pipeline is in the state of opening. The limiting buckle is used for limiting the pipeline, so that the position of the pipeline distributed on the device is more standard, and the slotted hole is ensured to be opposite to the pipeline.

When adopting above-mentioned technical scheme, have following beneficial effect: 1. this scheme is through the rotation of live-rollers, makes each slotted hole relative with each pipeline in proper order, and each pipeline enters into corresponding slotted hole in proper order, and each pipeline is opened in proper order, and when new pipeline is opened, other pipelines are in the state of closing by the live-rollers extrusion, have guaranteed that only a pipeline is in the state of opening to realized the automation of each pipeline and opened and close, give every blood sampling test tube in proper order and carry blood, the operation is fairly simple. 2. Because make opening and closing of each pipeline of live-rollers control, and each pipeline is by the spacing restriction of detaining, the position ratio of each pipeline distribution is more standard, and a plurality of pipelines can not crisscross together, when the live-rollers controlled the pipeline, can not take place the phenomenon that the switch obscures like manual control, and the pipeline can not opened or close by repetition, and the phenomenon that has avoided the blood in the pipeline to enter into the blood sampling test tube of having gathered blood takes place, can not appear the mistake.

Further, an air bag and an air tank are arranged on the vertical plate, a first air pipe and a second air pipe are connected between the air bag and the air tank, a first one-way valve enabling air in the air bag to enter the air tank in a one-way mode is arranged on the first air pipe, a second one-way valve enabling air in the air tank to enter the air bag in a one-way mode is arranged on the second air pipe, one end, connected with the air bag, of the second air pipe is inserted into the air bag, and a whistle is arranged at one end, located in the air bag, of the second air pipe; the rotating roller is fixedly connected with a cam which intermittently abuts against the air bag. Along with the rotation of the rotating roller, the cam can continuously extrude the air bag in the blood sampling process of all the blood sampling test tubes, the air bag is extruded to shrink, the air in the air bag enters the air tank through the first air pipe and the first one-way valve to be stored, and the air flow cannot directly flow back to the air bag after entering the air tank because the air bag is extruded by the cam; after all blood sampling test tubes will finish taking blood, the live-rollers drive the cam and separate with the gasbag just, and the gas in the gas pitcher enters into the gasbag through second trachea and second check valve under the effect of self atmospheric pressure, because the second trachea is located the one end of gasbag and is equipped with the whistle, so gaseous blowing whistle to make a sound, remind all blood sampling test tubes of doctor to finish taking blood, make the preparation of extracting the blood sampling needle from the patient on one's body.

Furthermore, a cavity is arranged in the rotating roller, a rotating rod is rotatably connected in the cavity, a plurality of extrusion wheels are fixedly connected to the rotating rod, and the number of the extrusion wheels is equal to that of the slotted holes; each slotted hole is provided with a plurality of sliding blocks, adjacent sliding blocks are connected in a sliding manner, the sliding blocks attached to the inner wall of the slotted hole are connected to the inner wall of the slotted hole in a sliding manner, the end parts, close to the axle center of the rotating roller, of the sliding blocks are provided with first magnets, the inner wall of the rotating roller is provided with second magnets, and the parts, facing the second magnets, of the first magnets are opposite to the parts, facing the first magnets, of the second magnets in magnetism; the end part of the sliding block close to the axle center of the rotating roller is intermittently abutted against the extrusion wheels, each extrusion wheel is opposite to each slotted hole, and the extrusion wheels are provided with notches. The dwang is used for driving the extrusion wheel and rotates. The extrusion wheel is used for intermittently extruding the sliding block. Through making the dwang rotate to make the extrusion wheel rotate, through control extrusion wheel pivoted angle, steerable extrusion wheel carries out extruded quantity to the sliding block in every slotted hole. When the sliding block is not extruded by the extrusion wheel, the first magnet on the sliding block and the second magnet on the inner wall of the rotating roller are mutually attracted, so that the sliding block is contracted into the slotted hole; when the sliding block is extruded by the extrusion wheel, the sliding block overcomes the attraction of the first magnet and the second magnet to slide out of the slotted hole due to the extrusion of the extrusion wheel. From this, through the quantity of control sliding block shrink, the size of steerable slotted hole opening, the larger the quantity of sliding block in the slotted hole of shrink, slotted hole opening is bigger, and the less the quantity of the sliding block of shrink, slotted hole opening is smaller. Thus, when the slotted opening is larger, the time for which each pipeline is opened is longer, so that under the condition that the blood flow rate is not changed, the blood collected by each blood collection test tube becomes more, and when the slotted opening is smaller, the time for which each pipeline is opened becomes shorter, so that under the condition that the blood flow rate is not changed, the blood collected by each blood collection test tube becomes less, thereby realizing the control of the blood collection amount in each blood collection test tube.

Furthermore, the end part of the sliding block close to the axis of the rotating roller is arc-shaped, the notch of the extrusion wheel is provided with an inlet surface, and the distance from the end part of the inlet surface close to the axis of the rotating roller is smaller than the distance from the end part of the sliding block facing the axis of the rotating roller to the axis of the rotating roller. Because the sliding block is the arc near the tip in live-rollers axle center, the tip that the sliding block is close to live-rollers axle center can match with the edge of extrusion wheel to it is more smooth and easy to rotate when making the extrusion wheel to the extrusion of sliding block like this. Because the gap of the extrusion wheel is provided with the inlet surface, the distance from the end part of the inlet surface close to the axle center of the rotating roller is less than the distance from the end part of the sliding block facing the axle center of the rotating roller to the axle center of the rotating roller, so that the side part of the sliding block is prevented from abutting against the gap of the extrusion wheel to block the extrusion wheel from ejecting the sliding block out of the slotted hole, the end part of the extrusion wheel close to the axle center of the rotating roller is favorably abutted against the sliding block, and the sliding.

Further, the dwang passes through the bolt with the live-rollers and fixes. From this, fix dwang and live-rollers together through the bolt, when the live-rollers rotates, the dwang can not rotate for the live-rollers at will.

Furthermore, the end of the rotating rod, which is positioned outside the rotating roller, is provided with scales distributed in a circumferential manner, and the rotating roller is provided with a pointer which is pointed on the scales. From this, when making the dwang rotate, medical staff accessible pointer indicate the scale know the degree of opening of slotted hole to be convenient for control pipeline open time does benefit to the control volume of taking a blood sample.

Furthermore, a limiting shell is installed on the vertical plate, the air bag is located in the limiting shell, and an opening for the cam to enter is formed in one side, close to the cam, of the limiting shell. Spacing shell is used for spacing the gasbag, prevents that the gasbag from receiving the extrusion of cam outwards inflation often to guarantee that the gasbag receives the shrink when extruding, do benefit to the cam and extrude the gas in the gasbag into the gas pitcher.

Furthermore, the number of the groups of the limit buckles is three, the number of the limit buckles in each group is equal to the number of the slotted holes in the rotating roller, one group of the limit buckles is positioned below the rotating roller, and the other two groups of the limit buckles are positioned above the rotating roller. From this, spacing the detaining spacing more stable to the pipeline.

Furthermore, the number of the slotted holes is three; the number of the squeezing wheels is also three. Therefore, the blood sampling device is suitable for the blood sampling condition that three blood sampling test tubes are used.

Further, the speed reducer is a gear structure speed reducer. Gear structure reducers are common reducers.

Drawings

FIG. 1 is a schematic view of a blood collection device;

FIG. 2 is a front view of the rotating roller of FIG. 1;

FIG. 3 is a sectional view of the turning roll shown in FIG. 2 taken along the line A;

fig. 4 is a schematic structural view of a rotating rod and a squeezing wheel in the rotating roller.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the blood sampling test tube comprises a base 1, a blood sampling test tube 2, a gas tank 3, a test tube plug 4, a vertical plate 5, a puncture plug end 6, a second gas tube 7, a first gas tube 8, a second one-way valve 9, a first one-way valve 10, a motor 12, a speed reducer 13, a gas bag 14, a cam 15, a rotating rod 16, a rotating roller 17, a limit buckle 18, a slotted hole 19, a pipeline 20, a four-way tube 21, a main tube 22, a first sliding block 23, a second sliding block 24, a third sliding block 25, a first magnet 26, an extrusion wheel 27, a second magnet 28 and an entering surface 31.

Example 1

Substantially as shown in figures 1-2 of the accompanying drawings: a blood sampling device comprises a base 1 and a vertical plate 5, wherein the base 1 is positioned at the bottom of the vertical plate 5 and is fixedly connected together through screws. Be equipped with the three standing groove that is used for placing blood sampling test tube 2 on the base 1, be equipped with the cylinder groove on the riser 5, install the cylinder (not shown in the figure) in the cylinder groove, install motor 12 through the screw on the cylinder pole of cylinder, the flexible realization motor 12 of accessible cylinder pole is close to and keeps away from riser 5 from this, is connected with reduction gear 13 on the motor 12, and reduction gear 13 in this embodiment also installs at the cylinder pole through the screw, and reduction gear 13 is the gear structure reduction gear. The speed reducer 13 is connected with a rotating roller 17 positioned on the left side of the speed reducer, when the motor is close to the vertical plate 5, the side wall of the rotating roller 17 can be attached to the vertical plate 5, and the right end of the rotating roller 17 is welded with a cam 15. The side wall of the rotating roller 17 is provided with three slotted holes 19, as shown in fig. 2, the three slotted holes 19 are arranged along the axial direction of the rotating roller 17, the projections of the three slotted holes 19 in the axial direction of the rotating roller 17 are uniformly distributed, and the projections of the three slotted holes 19 in the axial direction of the rotating roller 17 are not overlapped with each other when being on a plane. Be equipped with three spacing knot 18 of group on the riser 5, spacing knot 18 in this embodiment is the ribbon, and the quantity of every spacing knot 18 of group is three, and one of them group spacing knot 18 is located the below of live-rollers 17, and two sets of spacing knot 18 in addition are located the top of live-rollers 17. The vertical plate 5 is provided with an air bag 14 and an air tank 3, specifically, the vertical plate 5 is provided with a limiting shell (not shown in the figure) through screws, the limiting shell comprises five surfaces, the top of the limiting shell is provided with an opening, the air bag 14 is positioned in the limiting shell, and the opening of the limiting shell is used for enabling the cam 15 to enter; gas pitcher 3 passes through the screw mounting on the bottom of riser 5, be connected with first trachea 8 and second trachea 7 between gasbag 14 and the gas pitcher 3, be equipped with the first check valve 10 that makes the gaseous one-way entering in the gas pitcher 3 in the gasbag 14 on the first trachea 8, be equipped with the gaseous one-way second check valve 9 that enters into in the gasbag 14 that makes in the gas pitcher 3 on the second trachea 7, the left end of second trachea 7 inserts in the gasbag 14, gasbag 14 bonds with the pipe wall of second trachea 7 and seals up, be connected with the whistle on the left end of second trachea 7.

It is easy to understand that the electric motor 12 in this embodiment may be any machine capable of driving the speed reducer 13 to rotate, for example, the electric motor 12 may be a small motor; of course, the speed reducer 13 can be called as the speed reducer 13, so that the rotating roller 17 can rotate slowly when the speed of the motor 12 is reduced.

In addition, the multi-head blood taking needle is matched with a multi-head blood taking needle for use, the multi-head blood taking needle comprises a main pipe 22 and three pipelines 20, one end of the main pipe 22 is connected with a blood taking needle head, a handheld handle is arranged on the blood taking needle head, the other end of the main pipe 22 is connected with a four-way pipe 21, and one ends of the three pipelines 20 are connected to the four-way pipe 21. The cylinder is started, the cylinder drives the motor to be far away from the vertical plate 5, the motor drives the rotating roller to be far away from the vertical plate 5 through the speed reducer 13, the three pipelines 20 sequentially pass through the limiting buckle 18 from top to bottom, the three pipelines 20 are located between the vertical plate 5 and the rotating roller 17, the three pipelines 20 are sequentially distributed from left to right, the three pipelines 20 can be opposite to the groove holes 19 in the rotating roller 17, and the bottom ends of the three pipelines 20 are connected with the puncture plug ends 6. All put blood sampling test tube 2 in the standing groove of base 1, the top lid of blood sampling test tube 2 all is equipped with test tube stopper 4, and three thorn stopper end 6 loops through test tube stopper 4 and inserts in three blood sampling test tube 2.

The specific implementation process is as follows: during blood sampling, the motor 12 is driven to be close to the cylinder through the cylinder, the motor 12 drives the rotating roller 17 to be close to the vertical plate through the speed reducer 13, and after the side wall of the rotating roller 17 is attached to the vertical plate 5, the blood sampling needle head is penetrated into a blood vessel of a patient and is fixed through a bandage. Then the motor 12 is started, the motor 12 drives the rotating roller 17 to rotate slowly through the speed reducer 13, and the rotating speed of the rotating roller 17 is 36-72 degrees/min. In the process that the rotating roller 17 rotates slowly, the leftmost pipeline 20 is firstly opposite to the leftmost slotted hole 19 on the rotating roller 17, the leftmost pipeline 20 is positioned in the leftmost slotted hole 19, the leftmost pipeline 20 is not squeezed by the rotating roller 17, the leftmost pipeline 20 is in an open state, and collected blood enters the leftmost blood collection test tube 2 through the leftmost pipeline 20; and the other two pipelines 20 on the right side do not enter the slotted hole 19 of the rotating roller 17, the two pipelines 20 on the right side are squeezed together by the outer side wall of the rotating roller 17 and the vertical plate 5, the two pipelines 20 on the right side are blocked and closed, and blood cannot enter the two blood sampling test tubes 2 on the right side through the two pipelines 20 on the right side. Similarly, with the continuous rotation of the rotating roller 17, the middle pipeline 20 starts to enter the slot 19, so that blood enters the middle blood sampling test tube 2 through the middle pipeline 20, the middle blood sampling test tube 2 performs blood sampling, meanwhile, the leftmost slot 19 on the rotating roller 17 is far away from the leftmost pipeline 20, the leftmost pipeline 20 is squeezed by the rotating roller 17, the leftmost pipeline 20 stops circulating blood, the leftmost blood sampling test tube 2 stops sampling blood, moreover, the rightmost pipeline 20 is still squeezed by the rotating roller 17, and the rightmost blood sampling tube does not perform blood sampling. Similarly, with the continuous rotation of the rotating roller 17, the slot 19 on the rightmost side rotates to the pipeline 20 on the rightmost side, the blood sampling test tube 2 on the rightmost side takes blood, the two pipelines 20 on the left side are both extruded by the rotating roller 17 and the vertical plate 5, and the two blood sampling test tubes 2 on the left side stop sampling blood. Thus, blood is automatically sampled from the leftmost blood sampling tube 2 to the rightmost blood sampling tube 2 in sequence. By the embodiment, each pipeline 20 is not repeatedly opened or closed, so that the phenomenon that the blood in the pipeline 20 enters the blood collecting test tube 2 which collects the blood is avoided, and errors can not occur.

In addition, in the rotating process of the rotating roller 17, the rotating roller 17 drives the cam 15 to rotate, so that in the process of sequentially collecting blood from the leftmost blood collection test tube 2 to the rightmost blood collection test tube 2, the cam 15 continuously abuts against the air bag 14, the air bag 14 is squeezed by the cam 15 to be reduced, the air in the air bag 14 enters the air tank 3 through the first air pipe 8 and the first check valve 10, and the air pressure in the air tank 3 is increased. After the blood sampling of the rightmost blood sampling test tube 2 is finished, the cam 15 is separated from the air bag 14 along with the rotation of the rotating roller 17, the gas in the gas tank 3 enters the air bag 14 through the second gas pipe 7 and the second one-way valve 9 under the action of the gas pressure of the gas tank, and the air bag 14 is expanded; at the same time, the air blows the whistle on the second air tube 7, so that a sound is produced to remind a doctor to pull out the blood taking needle on the arm of the patient.

Example 2

With reference to fig. 2 to 4, embodiment 2 differs from embodiment 1 in that: be equipped with the cavity in the live-rollers 17, it is connected with dwang 16 to rotate in the cavity, it is concrete, the intermediate position at live-rollers 17's both ends is equipped with the rotation hole, dwang 16 passes from rotating the hole, the welding has three extrusion wheel 27 on the dwang 16, all be equipped with three sliding block on every slotted hole 19, three sliding block is first sliding block 23 in proper order, second sliding block 24 and third sliding block 25, sliding connection between the left side inner wall of first sliding block 23 and slotted hole 19, sliding connection between the right side inner wall of third sliding block 25 and slotted hole 19, second sliding block 24 can respectively with first sliding block 23 and third sliding block 25 sliding connection, concrete sliding connection can be for spout and protruding mode realization of mutually supporting. The first magnet 26 is adhered to the end portions of the first slide block 23, the second slide block 24 and the third slide block 25 close to the axial center of the rotating roller 17, the second magnet 28 is adhered to the inner wall of the rotating roller 17, and the magnetism of the portion of the first magnet 26 facing the second magnet 28 is opposite to that of the portion of the second magnet 28 facing the first magnet 26. The ends of the first sliding block 23, the second sliding block 24 and the third sliding block 25 close to the axle center of the rotating roller 17 are all arc-shaped, so that the extrusion wheel 27 can extrude the three sliding blocks smoothly, and the extrusion wheel 27 can slide smoothly relative to the three sliding blocks. The squeezing wheels 27 intermittently abut against the ends of the sliding blocks provided with the first magnets 26, each squeezing wheel 27 is opposite to each slotted hole 19, and the squeezing wheels 27 are provided with notches. The notch of the squeezing wheel 27 is provided with an entering surface 31, the distance from the end part of the entering surface 31 close to the axle center of the rotating roller 17 is smaller than the distance from the end part of the sliding block close to the axle center of the rotating roller 17, as shown in fig. 3, the distance from the lower end of the entering surface 31 to the axle center of the rotating roller 17 is smaller than the distance from the bottom end of the third sliding block 25 to the axle center of the rotating. The rotating rod 16 and the rotating roller 17 can be fixed through a bolt. The end of the rotating rod 16, which is positioned outside the rotating roller 17, is provided with scales which are distributed circumferentially, and the rotating roller 17 is provided with a pointer which points on the scales.

Combine fig. 3 to show, through this embodiment, before the blood sampling, the accessible manual work makes dwang 16 rotate clockwise, and when dwang 16 rotated, dwang 16 drove extrusion wheel 27 and rotates clockwise, through the clockwise pivoted range of control extrusion wheel 27, can make extrusion wheel 27 not extrude any sliding block, extrusion wheel 27 only extrudees first sliding block 23, perhaps extrusion wheel 27 extrudees first sliding block 23 and second sliding block 24 simultaneously.

When the pressing wheel 27 does not press any of the slide blocks, the three slide blocks are moved downward by the first magnet 26 and the second magnet 28, and the three slide blocks are retracted into the slot 19, and the opening length of the slot 19 is maximized. When the squeezing wheel 27 squeezes only the first sliding block 23, the first sliding block 23 is pushed upwards, the second sliding block 24 and the third sliding block 25 are positioned at the bottom of the slot hole 19 under the attraction of the first magnet 26 and the second magnet 28, the opening of the slot hole 19 becomes smaller, and the reduced width is the width of the first sliding block 23. When the squeezing wheel 27 squeezes both the first sliding block 23 and the second sliding block 24, the first sliding block 23 and the second sliding block 24 slide upwards, only the third sliding block 25 is positioned in the slot 19 under the action of the first magnet 26 and the second magnet 28, at this time, the opening size of the slot 19 is minimum, and the opening size of the slot 19 is equal to the width of the third sliding block 25. Thus, by this embodiment, the adjustment of the opening size of the slot 19 is achieved. In this way, when the opening of the slot 19 is larger, the pressing time of the rotary roller 17 to the tube 20 is shorter at the time of rotation, so that the time for which each tube 20 is opened is longer, so that the blood collected by each blood collection tube 2 becomes larger with the blood flow rate unchanged, and the time for which each tube 20 is opened becomes shorter with the opening of the slot 19 is smaller, so that the blood collected by each blood collection tube 2 becomes smaller with the blood flow rate unchanged, thereby achieving the control of the blood collection amount in each blood collection tube 2. Of course, when the rotating rod 16 rotates, the medical staff can know the opening degree of the slot 19 through the scale indicated by the pointer, thereby being convenient for controlling the blood sampling amount according to the blood sampling requirement.

It is easy to understand that after the rotating rod 16 is adjusted, the rotating rod 16 and the rotating roller 17 are fixed together through a bolt, so that the rotating rod 16 and the rotating roller 17 are prevented from rotating relatively in the rotating process of the rotating roller 17. In addition, all can set up the stopper on the three sliding block to the sliding distance of control sliding block prevents that the sliding block from following roll-off in the slotted hole 19, carries on spacingly to the slip of sliding block.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the concept of the present invention, and these should be construed as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.

Claims

1. A blood collection device characterized by: the blood sampling test tube rack comprises a base and a vertical plate which are fixedly connected together, wherein a plurality of placing grooves for placing blood sampling test tubes are formed in the base, a motor is mounted on the vertical plate, a speed reducer is connected onto the motor, a rotating roller is connected onto the speed reducer, a plurality of groove holes are formed in the rotating roller and are axially arranged along the rotating roller, and the projections of the groove holes in the axial direction of the rotating roller are uniformly distributed; a plurality of groups of limit buckles are arranged on the vertical plate; the vertical plate is provided with an air bag and an air tank, a first air pipe and a second air pipe are connected between the air bag and the air tank, the first air pipe is provided with a first one-way valve which enables air in the air bag to enter the air tank in a one-way mode, the second air pipe is provided with a second one-way valve which enables air in the air tank to enter the air bag in a one-way mode, one end, connected with the air bag, of the second air pipe is inserted into the air bag, and a whistle is arranged at one end, located in the air bag, of the second air pipe; the rotating roller is fixedly connected with a cam, and the cam intermittently abuts against the air bag; a cavity is arranged in the rotating roller, a rotating rod is rotatably connected in the cavity, a plurality of extrusion wheels are fixedly connected to the rotating rod, and the number of the extrusion wheels is equal to that of the slotted holes; each slotted hole is provided with a plurality of sliding blocks, adjacent sliding blocks are connected in a sliding manner, the sliding blocks attached to the inner wall of the slotted hole are connected to the inner wall of the slotted hole in a sliding manner, the end parts, close to the axle center of the rotating roller, of the sliding blocks are provided with first magnets, the inner wall of the rotating roller is provided with second magnets, and the parts, facing the second magnets, of the first magnets are opposite to the parts, facing the first magnets, of the second magnets in magnetism; the end part of the sliding block close to the axle center of the rotating roller is intermittently abutted against the extrusion wheels, each extrusion wheel is opposite to each slotted hole, and the extrusion wheels are provided with notches.

2. A lancing device according to claim 1, wherein: the sliding block is close to the tip in live-rollers axle center and is the arc, be equipped with the entering face on the breach of extrusion wheel, the distance that the tip that the entering face is close to the live-rollers axle center reaches the live-rollers axle center is less than the sliding block towards the tip in live-rollers axle center to the distance in live-rollers axle center.

3. A lancing device according to claim 1, wherein: the rotating rod and the rotating roller are fixed through a bolt.

4. A lancing device according to claim 1, wherein: the one end that the dwang is located the live-rollers outside is equipped with the scale that is the circumference and distributes, is equipped with the pointer on the live-rollers, and the pointer points on the scale.

5. A lancing device according to claim 1, wherein: install spacing shell on the riser, the gasbag is located spacing shell, and one side that spacing shell is close to the cam is equipped with the opening that makes the cam get into.

6. A lancing device according to claim 1, wherein: the number of the groups of the limit buckles is three, the number of the limit buckles in each group is equal to the number of the slotted holes in the rotating roller, one group of the limit buckles is positioned below the rotating roller, and the other two groups of the limit buckles are positioned above the rotating roller.

7. A lancing device according to any one of claims 2 to 4, wherein: the number of the slotted holes is three; the number of the squeezing wheels is also three.

8. A lancing device according to claim 7, wherein: the speed reducer is of a gear structure.