CN112090468A

CN112090468A - Carrier for blood collection tubes

Info

Publication number: CN112090468A
Application number: CN202010774890.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Yuan Aihao
Current assignee: Affiliated Hospital of University of Qingdao
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-12-18
Anticipated expiration: 2040-01-20
Also published as: CN111190023A; CN112090468B; CN111190023B

Abstract

The invention relates to a medical instrument, in particular to a carrier for a blood collection tube. Comprises a base and a clamp for clamping a blood collection tube; the clamp comprises a base and a clamping rod; the clamping rod comprises a cylindrical main rod body and a rotating shaft connected to the lower end of the main rod body, and the rotating shaft is rotatably inserted into the base; more than three clamping rods are arranged; a synchronous mechanism which enables all the clamping rods to synchronously rotate is arranged between the rotating shafts of all the clamping rods; a rotation resisting mechanism which is used for resisting the rotation of the clamping rods so as to limit the free rotation of the clamping rods and allow the clamping rods to rotate under the preset torque is arranged between at least one clamping rod and the base; the rotation resisting mechanism comprises an upper friction plate fixed on the base and a lower friction plate fixed on the rotating shaft of the clamping roller, and the upper friction plate is in contact with the lower friction plate. The invention prevents the clamping roller from rotating by the friction resistance generated by the upper and lower friction plates, and has simple structure and convenient implementation. The blood mixing device can realize the mixing of blood, has a simple structure, and is convenient for realizing the mixing operation of blood.

Description

Carrier for blood collection tubes

Technical Field

The invention relates to a medical instrument, in particular to a carrier for a blood collection tube.

Background

The automatic blood detection and analysis system is a device for detecting and analyzing collected blood samples, and is widely applied to clinical examination. The existing blood automatic detection and analysis system usually adopts a conveying line to convey blood sampling tubes to different stations, so that the purpose of different automatic detection and analysis is achieved.

Blood collection tubes are typically loaded using a carrier. Chinese patent application publication CN109530257A discloses a sample container transfer device and method thereof, which loads blood collection tubes through transportation seats (i.e. transportation carriers). The transportation seat can only load blood sampling tubes, has single function and needs to be improved.

Disclosure of Invention

The invention aims to provide a carrier for blood collection tubes, which comprises a base and a clamp for clamping the blood collection tubes; the carrier also comprises a push rod, the push rod is arranged on the base in a vertically sliding manner, and the clamp is fixedly arranged at the upper end of the push rod; the carrier also comprises a sleeve which is rotationally arranged on the base around the axis of the sleeve, the push rod can be inserted into the sleeve in a sliding way along the axis of the sleeve, and the axis of the sleeve is superposed with the axis of the push rod; a circumferential fixing mechanism for limiting the rotation of the push rod relative to the sleeve is arranged between the sleeve and the push rod; the clamp comprises a base and a clamping rod, wherein the base is provided with a central axis; the clamping rod comprises a cylindrical main rod body and a rotating shaft connected to the lower end of the main rod body, and the rotating shaft is rotatably inserted into the base; the axis of the main stick body deviates from the axis of the rotating shaft; the clamping rods are more than three, the rotating shafts of all the clamping rods are circumferentially distributed at intervals around the central axis, and the main rod bodies of all the clamping rods surround a clamping space for inserting the lower end of the blood sampling tube; the main stick bodies of the clamping sticks are respectively contacted with the side walls of the blood sampling tube when the lower end of the blood sampling tube is inserted into the clamping space; a synchronous mechanism which enables all the clamping rods to synchronously rotate is arranged between the rotating shafts of all the clamping rods; a rotation resisting mechanism which is used for resisting the rotation of the clamping rods so as to limit the free rotation of the clamping rods and allow the clamping rods to rotate under the preset torque is arranged between at least one clamping rod and the base; the rotation resisting mechanism comprises an upper friction plate fixed on the base and a lower friction plate fixed on the rotating shaft of the clamping roller, and the upper friction plate is in contact with the lower friction plate.

The invention prevents the clamping roller from rotating by the friction resistance generated by the upper and lower friction plates, and has simple structure and convenient implementation.

Drawings

Fig. 1 is a schematic view showing a structure of an automatic blood detection and analysis system to which the present invention is applied;

FIG. 2 is a perspective view of the transport line of the automated blood test analysis system and the carrier thereon, in which the present invention is applied;

FIG. 3 shows a front view of the present invention;

FIGS. 4 and 5 show perspective views of the present invention from two different angles, respectively;

FIGS. 6 and 7 show exploded perspective views from two different angles of the present invention;

FIG. 8 shows a perspective view of the clamp of the present invention and a blood collection tube thereon;

FIG. 9 shows a front view of the clamp of the present invention and a blood collection tube thereon;

FIG. 10 shows a cross-sectional view A-A of FIG. 9;

FIG. 11 shows a top view of the clamp of the present invention;

FIG. 12 shows a cross-sectional view B-B of FIG. 11;

FIG. 13 shows a cross-sectional C-C view of FIG. 12;

FIG. 14 shows a front view of the jaw of the present invention;

FIG. 15 shows an enlarged partial view of portion D of FIG. 12;

figures 16 and 17 show perspective views of the clamp of the invention at two different angles, respectively;

FIGS. 18 and 19 show perspective exploded views of the clip of the present invention at two different angles, respectively;

FIG. 20 shows an enlarged view of portion E of FIG. 18, wherein the anti-rotation mechanism is a first embodiment;

fig. 21 shows an enlarged view of part F of fig. 19, wherein the anti-rotation mechanism is a first embodiment;

fig. 22 and 23 are two different angle exploded perspective views showing the anti-rotation mechanism as a second embodiment, wherein the upper friction plate is separated from the lower friction plate;

fig. 24 to 28 are schematic views showing a blood mixing process of the automatic blood detection and analysis system applied to the present invention;

FIG. 29 shows a front view of the invention and a snap strip recessed within the annular groove;

FIG. 30 shows a front view of the present invention and a rub strip in contact with a rub wheel;

fig. 31 shows an enlarged view of part G of fig. 29;

FIG. 32 shows a schematic view of the card strip removed from the annular groove on the basis of FIG. 31;

FIG. 33 shows an enlarged view of part H of FIG. 30;

FIG. 34 shows a schematic view of the friction bar removed from the friction wheel based on FIG. 33;

fig. 35 shows a perspective view of a wedge block;

FIG. 36 shows a perspective view of a rub strip;

fig. 37 shows a perspective view of a card strip.

Reference numerals:

10 conveying lines, 101 bar code reading stations, 102 analysis stations, 103 mixing stations, 104 bar code readers, 105 blood cell automatic analyzers and 106 guide rails;

20 carrier, 201 base, 202 push rod, 203 wedge block, 204 lifting inclined plane, 205 spherical surface, 206 sleeve, 207 axial convex strip, 208 axial groove, 209 friction strip, 210 friction wheel, 211 annular groove, 212 clamping strip, 213 slide block, 214 sleeve end face, 215 elastic gasket;

30 blood collection tubes;

40 clamp, 401 base, 402 clamping rod, 403 main rod body, 404 rotating shaft, 405 main rod body axis, 406 rotating shaft axis, 407 clamping space, 408 elastic sleeve, 409 outer gear, 410 idler wheel, 411 upper shell, 412 lower shell, 413 inner cavity, 414 disc, 415 radial extension arm, 416 recess, 417 upper friction plate, 418 lower friction plate;

50 spring detent beads, 501 ball.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows an automatic blood detection and analysis system, which includes a conveying line 10 and a carrier 20 for loading blood collection tubes, wherein the carrier 20 is conveyed by the conveying line 10, a barcode reading station 101 for reading barcodes (not shown) attached to the blood collection tubes 30 and an analysis station 102 for analyzing blood samples in the blood collection tubes 30 are disposed on the conveying line 10, a blending station 103 for blending blood samples in the blood collection tubes 30 is further disposed on the conveying line 10, and the blending station 103, the barcode reading station 101 and the analysis station 102 are sequentially arranged along a conveying direction of the conveying line 10.

This technical scheme can go up through the overall arrangement mixing station and carry out the mixing to the blood in the blood sampling pipe, avoids blood layering and is difficult to detect, provides the assurance for the accuracy of detection and analysis result. Simultaneously, along the direction of delivery of transfer chain, the bar code reads the station and is located the place ahead of mixing station, can realize accomplishing earlier and carry out the bar code after the mixing and read, can avoid appearing the mistake, reasonable in design, if accomplish earlier and carry out the mixing after the bar code is read, must make heparin tube and carrier one-to-one, in case the heparin tube misplace in the time of on the carrier of difference just can the information mistake appear, especially take out the carrier with the heparin tube and concentrate in the operation of transporting the carrier after the mixing.

In this embodiment, the conveyor line 10 can simultaneously convey a plurality of carriers 20 at intervals.

The barcode reading station 101 is provided with a barcode reader 104, and the analysis station 102 is provided with an automatic blood cell analyzer 105. In this embodiment, the barcode reader 104 and the automatic blood cell analyzer 105 are both of the prior art, and are not described herein again.

As shown in fig. 2 to 7, the carrier 20 includes a base 201, a push rod 202 and a clamp 40 for clamping the blood collection tube 30, the base 201 is horizontally slidably mounted on the conveying line 10, the push rod 202 is vertically slidably mounted on the base 201, in this embodiment, the vertical sliding direction of the push rod 202 is perpendicular to the horizontal sliding direction of the base 201, and the clamp 40 is fixedly mounted on the upper end of the push rod 202;

the blood automatic detection and analysis system further comprises a sliding driving mechanism arranged at the blending station 103, and the sliding driving mechanism is arranged to drive the push rod 202 to slide relative to the base 201 when the base 201 passes through the blending station 103 along the conveying direction of the conveying line 10.

The carrier of this technical scheme has the push rod that can slide from top to bottom relative base to be fixed in the upper end of push rod with anchor clamps, so that drive the heparin tube when the push rod slides from top to bottom and beat from top to bottom and realize the mixing of blood. The blood mixing device is simple in structure and convenient for achieving blood mixing operation. And through setting up the actuating mechanism that slides and combine gliding push rod from top to bottom, can make the base can make push rod, anchor clamps and heparin tube take place to beat relative base in the motion process, borrow this in order to realize the mixing of blood. The mixing of blood is realized to the while at the base motion, need not to stop the base, saves time, improves detection efficiency.

The sliding driving mechanism comprises a wedge block 203;

as shown in fig. 35, the wedge block 203 has a lifting slope 204 for contacting with the lower end of the push rod 202;

the height of the lifting slope 204 gradually increases along the conveying direction of the conveying line 10;

the lower end of the push rod 202 firstly contacts the lifting inclined plane 204 and then leaves the wedge block 203 when the base 201 passes through the blending station 103 along the conveying direction of the conveying line 10;

the push rod 202 slides up and down along the lifting slope 204 when the lower end of the push rod contacts the lifting slope 204;

the push rod 202 descends and slides under the gravity of the push rod 202 when the lower end of the push rod leaves the wedge block 203.

In this embodiment, the specific process of mixing the blood is as follows, and as shown in fig. 24, the base 201 slides along the conveying direction of the conveying line 10. As shown in FIG. 25, when the base 201 reaches the blending station 103, the lower end of the push rod 202 first contacts the lift ramp 204. As shown in fig. 26, when the base 201 continues to slide in the conveying direction of the conveyor line 10, the push rod 202 rises along the lift slope 204, and as shown in fig. 27, the push rod 202 reaches the uppermost position of the lift slope 204. As shown in fig. 28, when the base 201 continues to slide in the conveying direction of the line 10, the lower end of the pusher 202 is separated from the wedge block 203, and at this time, the pusher 202 (including the jig 40 and the blood collection tube 30) is caused to slide downward by the gravity of the pusher 202 (including the jig 40 and the blood collection tube 30) (the pusher, the jig, and the blood collection tube move freely without taking frictional resistance into consideration). Therefore, the blood sampling tube 30 can jump up and down to achieve the effect of uniformly mixing the blood.

The sliding driving mechanism disclosed by the technical scheme does not need to drive the push rod by means of an extra power source consuming energy, and is simple in structure and convenient to implement.

In this embodiment, the lower end of the push rod 202 is provided with a spherical surface 205 for contacting the lifting slope 204.

In this embodiment, the wedge of this mixing station department has the polylith, and these wedges distribute along the direction of delivery of transfer chain interval. Each wedge can realize jumping once of heparin tube, and polylith wedge alright realize jumping many times to improve blood mixing effect.

The carrier 20 further comprises a sleeve 206, the sleeve 206 being rotatably mounted on the base 201 about its axis, in this embodiment the sleeve 206 is rotatably mounted on the base by means of bearings, the push rod 202 is slidably inserted into the sleeve 206 along the axis of the sleeve 206, in this embodiment the axis of the sleeve coincides with the axis of the push rod;

a circumferential fixing mechanism for limiting the push rod 202 to rotate relative to the sleeve 206 is arranged between the sleeve 206 and the push rod 202; the circumferential fixing mechanism comprises an axial rib 207 arranged on the outer side wall of the push rod 202 and an axial groove 208 arranged on the inner wall of the sleeve 206, the axial rib 207 and the axial groove 208 both extend along the axial direction of the sleeve 206, the axial rib 207 is sunk into the axial groove 208, and the axial rib 207 is in sliding fit with the axial groove 208.

In the embodiment, 3 axial convex strips and 3 axial grooves are respectively shown in the figure, the axial convex strips and the axial grooves are distributed at equal intervals in the circumferential direction around the axis of the sleeve, and each axial convex strip is respectively arranged in one axial groove.

As shown in fig. 30, 33 and 34, the automatic blood testing and analyzing system further includes a rotary driving mechanism disposed at the barcode reading station 101, and the rotary driving mechanism is configured to drive the sleeve 206 to rotate relative to the base 201 when the base 201 passes through the barcode reading station 101 along the conveying direction of the conveying line 10.

This technical scheme's carrier can make the heparin tube also can rotate by the vertical runout through setting up the sleeve, so that the reading of realization to pasting the bar code on the heparin tube when the heparin tube rotates. The push rod can rotate along with the sleeve by arranging a circumferential fixing mechanism.

This technical scheme can make sleeve, push rod, anchor clamps and the relative base rotation of heparin tube through setting up rotary drive mechanism at the motion in-process can make the base, rotates the heparin tube so that will paste the bar code on the heparin tube and rotate to the within range that the bar code reader can read, borrow this in order to accomplish the reading to pasting the bar code on the heparin tube. Particularly, the reading of the bar code is completed under the condition that the relative position of the bar code on the blood sampling tube and the base (namely the relative position of a bar code reader on a bar code reading station) is random and uncertain. According to the technical scheme, the bar code reading is realized while the base moves, the base does not need to be stopped, the time is saved, and the detection efficiency is improved. In addition, the blood sampling tube is rotated to mix the blood evenly.

The rotary driving mechanism includes a rubbing strip 209, as shown in fig. 36, the lengthwise direction of the rubbing strip 209 is parallel to the conveying direction of the conveying line 10;

the outer side wall of the sleeve 206 is fixedly sleeved with a friction wheel 210, and the axis of the friction wheel 210 is coincident with the axis of the sleeve 206; the friction wheel is arranged so that the sleeve can rotate by driving the friction wheel to rotate;

the friction wheel 210 contacts the friction bar 209 as the base 201 travels along the conveyor line 10 in the direction of travel through the barcode reading station 101. In this embodiment, friction wheel and friction strip realize friction drive, can roll on the friction strip when friction wheel and friction strip contact, drive the sleeve rotation through the rolling contact of friction strip and friction wheel. The friction wheel and the friction strip can be made of rubber or silica gel.

The rotary driving mechanism disclosed by the technical scheme is simple in structure and convenient to implement.

As shown in fig. 29, 31 and 32, the automatic blood testing and analyzing system further includes an axial fixing mechanism disposed at the analyzing station 102, and configured to slide the thrust rod 202 relative to the sleeve 206 when the base 201 passes through the analyzing station 102 along the conveying direction of the conveying line 10;

this technical scheme is through setting up axial fixity mechanism so that limit push rod, anchor clamps and heparin tube beat to the sample needle that makes the blood cell autoanalyzer who inserts the heparin tube and absorb blood can be pulled out smoothly.

The outer side wall of the push rod 202 is provided with an annular groove 211 which surrounds the axis of the sleeve 206 in one circle, and the annular groove 211 is positioned at the lower end of the push rod 202; the axial fixation of the push rod is convenient to realize by arranging the annular groove;

the axial fixing mechanism comprises a clamping strip 212, as shown in fig. 37, the length direction of the clamping strip 212 is parallel to the conveying direction of the conveying line 10;

the strip 212 is recessed within the annular recess 211 as the base 201 travels through the analysis station 102 in the direction of transport of the transport line 10.

The axial fixing mechanism disclosed by the technical scheme is simple in structure and convenient to implement.

In this embodiment, the clip strip 212 is disposed to pass through the annular groove 211 when the base 201 slides in the conveying direction of the conveyor line 10.

In this embodiment, the base 201 is horizontally slidably mounted on the conveyor line 10, specifically, the conveyor line 10 includes a guide rail 106, and the bottom of the base 201 is provided with a sliding block 213 slidably mounted on the guide rail 106. In this embodiment, there are two rails 106, the base 201 spans between the two rails 106, and each rail 106 has a T-shaped cross section.

The wedge block 203, the friction strip 209 and the clamping strip 212 are all located between the two guide rails 106. The wedge, the rubbing strip, the clamping strip and the guide rail are fixed relatively, for example, the wedge, the rubbing strip, the clamping strip and the guide rail are fixedly mounted on a frame (not shown).

As shown in fig. 8 to 19, the clamp 40 comprises a base 401 and a clamping roller 402, the base 401 has a central axis, and in the embodiment, the central axis of the base 401 coincides with the axis of the push rod 202;

the clamping roller 402 comprises a main roller body 403 with a cylindrical shape and a rotating shaft 404 connected to the lower end of the main roller body 403, wherein the rotating shaft 404 is rotatably inserted into the base 401;

the axis 405 of the main shaft is offset from the axis 406 of the shaft;

the clamping rods 402 are more than three, the rotating shafts 406 of all the clamping rods are circumferentially distributed at intervals around the central axis, and the main rod bodies 403 of all the clamping rods surround a clamping space 407 for inserting the lower end of the blood collection tube 30;

when the lower end of the blood collection tube 30 is inserted into the holding space 407, the main stick body 403 of each stick is in contact with the side wall of the blood collection tube 30, so that the blood collection tube 30 is held and confined in the holding space 407;

a synchronous mechanism for synchronously rotating all the clamping rods 402 is arranged between the rotating shafts 404 of all the clamping rods.

In this embodiment, the blood collection tube is inserted into the holding space at the lower end thereof, and the main stick bodies of the respective holding sticks are in contact with the side wall of the blood collection tube, whereby the blood collection tube can be loaded. The friction drive is realized with the main rod body of each clamp rod to the heparin tube, rotates the heparin tube and rotates in order to drive each clamp rod, uses the axis of its pivot as the center of rotation when each clamp rod rotates, because the axis of the main rod body deviates from the axis of pivot, when the main rod body rotates along with the pivot, the distance of the axis of the main rod body to the central axis of base changes, borrows this with the clamping-force of adjustment centre gripping heparin tube, improves life. Even the clamping of the blood sampling tubes with different tube diameters. Simultaneously, make each press from both sides the rod and can rotate in step through setting up lazytongs to make each press from both sides the rod unanimous to the pressure of heparin tube, improve the stability and the fastness of centre gripping.

In this embodiment, order about the heparin tube through manual and rotate and to adjust clamping-force, the operation is convenient. In addition, the main stick body of any gripping stick can be manually and directly driven to rotate.

The figures show three gripping bars, but the number of gripping bars is not limited to the number shown in the figures, and the number of gripping bars may be four, five, six, etc., for example.

In this embodiment, the main stick body 403 of each clamping stick is a hard material stick, such as a metal stick, a wood stick, a hard plastic stick, etc., the main stick body 403 of each clamping stick is externally sleeved with an elastic sleeve 408, the elastic sleeve 408 can be a rubber sleeve, a silica gel sleeve, etc., and the blood collection tube is prevented from being in hard contact with the main stick body of the clamping stick by the elastic sleeve, so that the abrasion is reduced, and the friction force can be increased; the stick made of hard material has extremely high fatigue strength and long service life.

The synchronous mechanism is a gear transmission mechanism which comprises external gears 409 and an idler gear 410, wherein the number of the external gears 409 is the same as that of the clamping rollers 402, each external gear 409 is fixed on a rotating shaft 404 of one clamping roller, all the external gears 409 are not in contact with each other, and the idler gear 410 is meshed with all the external gears 409 simultaneously.

The synchronizing mechanism disclosed by the technical scheme is simple in structure and convenient to implement.

In this embodiment, the base 401 is composed of an upper housing 411 and a lower housing 412 which are spliced together, an inner cavity 413 is formed in the upper housing 411 and the lower housing 412, the rotating shafts 404 of all the clamping rods penetrate through the upper housing 411 and then extend into the inner cavity 413, and the synchronizing mechanism is arranged in the inner cavity 413.

Furthermore, the synchronizing mechanism may be a chain transmission mechanism (not shown in the figure), which includes the same number of chain wheels as the number of the clamping rods and a chain, each chain wheel is fixed on the rotating shaft of one clamping rod, and the chain is wound on all the chain wheels.

Between at least one of the clamping rods 402 and the base 401, there is a rotation-resisting mechanism for resisting the rotation of the clamping rod 402 to prevent the clamping rod 402 from freely rotating and allow the clamping rod 402 to rotate under a predetermined torque.

This technical scheme hinders the mechanism through the setting and can make the clamping rod stop steadily, rotates the clamping rod and adjusts to suitable clamping-force after, avoids clamping the rod contra-rotation and the pine takes off, improves the stability of centre gripping heparin tube. Particularly, when the carrier is conveyed along the conveying line and faces working environments such as vibration, jumping and the like, the action of the rotation blocking mechanism is more remarkable.

In this embodiment, the friction torque between the blood collection tube inserted into the holding space and the main rod body of each clamping rod is set to be sufficient to drive the clamping rod to rotate against the blocking force of the rotation blocking mechanism.

In this embodiment, a set of rotation blocking mechanisms is respectively disposed between each clamping roller and the base. Of course, only one of the clamping rods and the base can be provided with a group of rotation resisting mechanisms.

In this embodiment, the end surface 214 of the sleeve is provided with an elastic pad 215, and under the action of the gravity of the push rod, the base 401 abuts against the elastic pad 215, so that the elastic pad can buffer the descending of the blood collection tube, the clamp and the blood collection tube.

As shown in fig. 20 and 21, the first embodiment of the rotation blocking mechanism is: the rotation resisting mechanism comprises a disc 414 fixed on the base 401 and a radial extension arm 415 fixed on the rotating shaft 404 of the clamping rod, wherein the radial extension arm 415 is provided with a spring positioning ball 50, one surface of the disc 414 facing the spring positioning ball 50 is provided with a plurality of concave grooves 416 for the ball 501 of the spring positioning ball to sink into, and all the concave grooves 416 are distributed at equal intervals in the circumferential direction around the axis 406 of the rotating shaft; in this embodiment, the ball of the spring-loaded ball is selectively recessed into any one of the pockets during rotation of the clamping bar, thereby providing resistance to rotation of the clamping bar. This technical scheme adopts the spring location pearl as hindering the commentaries on classics mechanism, and its simple structure just has the stability of higher locking pine taking off. In this embodiment, the spring positioning ball belongs to the prior art, and is not described herein again.

As shown in fig. 22 and 23, the second embodiment of the rotation preventing mechanism is: the rotation preventing mechanism comprises an upper friction plate 417 fixed on the base 401 and a lower friction plate 418 fixed on the rotating shaft 404 of the clamping rod, wherein the upper friction plate 417 is contacted with the lower friction plate 418. The technical scheme has the advantages that the friction resistance generated by the upper friction plate and the lower friction plate can prevent the clamping roller from rotating, the structure is simple, and the implementation is convenient.

Claims

1. A carrier for blood collection tubes comprises a base and a clamp for clamping the blood collection tubes;

the carrier also comprises a push rod, the push rod is arranged on the base in a vertically sliding manner, and the clamp is fixedly arranged at the upper end of the push rod;

the carrier also comprises a sleeve which is rotationally arranged on the base around the axis of the sleeve, the push rod can be inserted into the sleeve in a sliding way along the axis of the sleeve, and the axis of the sleeve is superposed with the axis of the push rod;

a circumferential fixing mechanism for limiting the rotation of the push rod relative to the sleeve is arranged between the sleeve and the push rod;

the clamp comprises a base and a clamping rod, wherein the base is provided with a central axis;

the clamping rod comprises a cylindrical main rod body and a rotating shaft connected to the lower end of the main rod body, and the rotating shaft is rotatably inserted into the base;

the axis of the main stick body deviates from the axis of the rotating shaft;

the clamping rods are more than three, the rotating shafts of all the clamping rods are circumferentially distributed at intervals around the central axis, and the main rod bodies of all the clamping rods surround a clamping space for inserting the lower end of the blood sampling tube;

the main stick bodies of the clamping sticks are respectively contacted with the side walls of the blood sampling tube when the lower end of the blood sampling tube is inserted into the clamping space;

a synchronous mechanism which enables all the clamping rods to synchronously rotate is arranged between the rotating shafts of all the clamping rods;

a rotation resisting mechanism which is used for resisting the rotation of the clamping rods so as to limit the free rotation of the clamping rods and allow the clamping rods to rotate under the preset torque is arranged between at least one clamping rod and the base;

the method is characterized in that:

the rotation resisting mechanism comprises an upper friction plate fixed on the base and a lower friction plate fixed on the rotating shaft of the clamping roller, and the upper friction plate is in contact with the lower friction plate.

2. A carrier for blood collection tubes as in claim 1, wherein:

this circumference fixed establishment is including locating the axial sand grip of the lateral wall of push rod and locating the axial recess of sleeve inner wall, and this axial sand grip and axial recess all extend along telescopic axis direction, and the axial sand grip is absorbed in the axial recess, and axial sand grip and axial recess sliding fit.

3. A carrier for blood collection tubes as in claim 2, wherein: the outer side wall of the sleeve is fixedly sleeved with a friction wheel, and the axis of the friction wheel is superposed with the axis of the sleeve;

the outer side wall of the push rod is provided with a ring-shaped groove which surrounds the axis of the sleeve by a circle and is positioned at the lower end of the push rod.

4. A carrier for blood collection tubes as in claim 3, wherein: the end face of the sleeve is provided with an elastic gasket, and the base is propped against the elastic gasket under the action of the gravity of the push rod.