CN212207415U - Porous automatic sampling device - Google Patents

Abstract

The utility model relates to a multi-hole automatic sample feeding device, which comprises a frame, a sample feeding module and a test tube rotating module, wherein the sample feeding module and the test tube rotating module are arranged on the frame; the sample injection module comprises a sample mixing mechanism, a sample injection needle and a first driving device for driving the sample injection needle to move vertically; sample mixing mechanism includes that shell, drive shell follow vertical movement's second drive arrangement, rotate the axis of rotation of connection on the shell to and the rotatory first motor of drive axis of rotation, coaxial rigid coupling has the lifter that is located under the syringe in the axis of rotation, the up end of lifter be equipped with the standing groove of test tube adaptation. The utility model realizes automatic sample feeding through the rotation of the test tube rack and the linear motion of the sample feeding needle in the vertical direction; the function of uniformly mixing the samples is realized through the rapid rotation of the test tube around the central shaft of the test tube; the cleaning function of the sampling needle is realized by cleaning the swab, so that cross contamination is prevented; and scanning and registering the sample information through a bar code scanner.

Description

Porous automatic sampling device

Technical Field

The utility model relates to an analysis experiment equipment technical field especially involves a porous autoinjection device.

Background

In the medical field, the sample introduction process is a necessary link for biochemical analysis of collected samples. Most hospitals and scientific research institutions still adopt the mode of manual sample introduction and sample changing at present, so that the work task of experimenters is heavy, and the work efficiency is low. Most of the existing automatic sampling devices in the current market are individually designed according to specific instruments, are not strong in universality and expensive, and most of automatic sampling mechanisms do not have a sample mixing function, so that the whole sampling equipment cannot complete sample injection of samples to be mixed, and the use scene of the automatic sampling equipment is limited.

Disclosure of Invention

The utility model discloses to prior art not enough, provide a porous autoinjection device, the commonality is strong to the sample mixing has been realized advancing the appearance in-process.

The utility model is realized by the following technical proposal, and provides a multi-hole automatic sample feeding device, which comprises a frame, a sample feeding module and a test tube rotating module, wherein the sample feeding module and the test tube rotating module are arranged on the frame;

the sample injection module comprises a sample mixing mechanism, a sample injection needle and a first driving device for driving the sample injection needle to move vertically;

the sample blending mechanism comprises a shell, a second driving device for driving the shell to move vertically, a rotating shaft rotationally connected to the shell and a first motor for driving the rotating shaft to rotate, wherein a lifting rod positioned right below the sample injection needle is coaxially and fixedly connected to the rotating shaft, and a placing groove matched with the test tube is formed in the upper end face of the lifting rod;

the test tube rotation module comprises a test tube rack and a second motor for driving the test tube rack to rotate, a plurality of test tubes distributed along the circumferential direction are arranged on the test tube rack to support the test tubes, and the test tubes support the test tubes to be located between the sample injection needles and the lifting rods in the vertical direction.

According to the scheme, the test tubes are supported through the test tube supporting positions on the test tube rack, the test tube rack is driven to rotate through the second motor, the test tubes are sequentially rotated to be right below the sample injection needles, the universality is strong, the shell is driven to move upwards through the second driving device, the placing groove supports the test tubes, the rotating shaft and the lifting rod are driven to rotate when the first motor rotates, the test tubes are rotated along with the lifting rod by utilizing the friction force between the test tubes and the placing groove, and the uniform mixing of samples is realized; drive the injection needle through first drive arrangement and move down to the test tube in, inhale the appearance can.

As optimization, a cleaning swab positioned between the sample injection needle and the test tube is also arranged on the frame. This optimization scheme is through setting up the washing swab between syringe and test tube, washs the syringe before the syringe gets into the test tube and inhales the appearance and inhale the appearance after, prevents cross contamination.

As optimization, a first linear guide rail extending vertically is fixedly connected to the frame, a first sliding block and a second sliding block located below the first sliding block are slidably connected to the first linear guide rail, a sample injection needle fixing seat for installing the sample injection needle is fixedly arranged on the first sliding block, and a cleaning swab bracket for installing a cleaning swab is fixedly arranged on the second sliding block; the cleaning swab support is fixedly connected with a second spring support, the rack is fixedly connected with a first spring support positioned above the second spring support, and the first spring support is connected with the second spring support through a spring. This optimization scheme will advance a kind needle fixing base and wash swab support mounting on being located same linear guide's two sliders, has guaranteed that advance a kind needle and through wasing the swab when reciprocating, avoids advancing a kind needle and removes the skew and can't be by the abluent condition, through setting up the spring, makes and washs the swab support and can move the certain distance along with advancing a kind needle lapse to when advancing a kind needle upwards the rebound, make through the effect of spring wash the swab support and wash the swab and reset.

And as optimization, a rubber sealing plug is arranged at the bottom of the connection between the sample injection needle and the sample injection needle fixing seat. This optimization scheme has improved the leakproofness that injection needle and injection needle fixing base are connected through setting up the rubber sealing plug.

As optimization, the device also comprises a friction pad arranged in a tangent way with the test tube right below the sample injection needle, and a fourth driving device for driving the friction pad to move along the tangent direction of the test tube; the rack is provided with a bar code scanning mechanism facing the test tube. This optimization scheme utilizes the frictional force of friction pad and test tube to drive the test tube and rotates when fourth drive arrangement drive friction pad removes to make the bar code on the test tube rotate certain moment of in-process at the test tube and towards bar code scanning mechanism, the structure is very ingenious, has guaranteed the accurate correspondence of advance kind information, has avoided human error.

As optimization, the bar code scanning mechanism comprises a reflector support frame, a bar code scanner mounting seat, a reflector and a bar code scanner; the bar code scanner mounting seat is fixed on the frame, the bar code scanner and the reflector support frame are both fixed on the bar code scanner mounting seat, and the reflector is fixed on the reflector support frame through gluing. The bar code scanning mechanism of the optimization scheme utilizes the bar code scanner to scan the bar code on the test tube, and has simple structure and convenient use.

Preferably, the rack is further provided with a third linear guide rail extending along the transverse direction, a third sliding block arranged on the third linear guide rail in a sliding manner, and a third driving device for driving the third sliding block to move along the third linear guide rail in the transverse direction, and the test tube rack is arranged on the third sliding block. This optimization scheme's setting can be through the third drive arrangement with the test-tube rack to keeping away from the removal of injection needle place side to make things convenient for the staff to change the sample that awaits measuring.

Preferably, a second linear guide rail extending vertically is fixedly arranged on the frame, and the shell is fixedly connected with a sliding block arranged on the second linear guide rail in a sliding manner. This optimization scheme is through setting up second linear guide, guarantees that the shell avoids taking place the incline along vertical movement to guarantee that standing groove on the lifter aligns with the test tube.

As optimization, a handle is fixedly arranged at the rotating center of the test tube rack. This optimization scheme is through setting up the handle, and convenient manual rotates the test-tube rack, has improved the convenience of using.

The utility model has the advantages that: automatic sample introduction is realized through the rotation motion of the test tube rack and the linear motion of the sample injection needle in the vertical direction; the function of uniformly mixing the samples is realized through the rapid rotation of the test tube around the central shaft of the test tube; the cleaning function of the sampling needle is realized by cleaning the swab, so that cross contamination is prevented; scanning and registering sample information through a bar code scanner; the device has the advantages that the structural design meets different sampling requirements, the universality is high, each motion module is relatively independent, the motion mechanism is simple and stable, and the sample is convenient to replace.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a front structure of a sample injection module;

FIG. 3 is a schematic diagram of a back structure of a sample injection module;

FIG. 4 is a schematic structural view of a sample mixing mechanism;

FIG. 5 is a schematic front view of a rotary module;

FIG. 6 is a schematic side view of a rotary module;

FIG. 7 is a front view of the rotary actuator;

FIG. 8 is a schematic side view of the rotary actuator;

shown in the figure:

100. sample feeding module, 110, support base, 120, first screw, 130, test tube rotating mechanism, 131, first cylinder, 132, second screw, 133, friction pad, 140, vertical support plate, 150, sample feeding mechanism, 151, first limit screw, 152, sample feeding needle fixing seat, 153, sample feeding needle, 154, third screw, 155, second cylinder connecting piece, 156, rubber sealing plug, 157, fourth screw, 158, first spring support, 159, first linear guide rail, 1510, spring, 1511, second spring support, 1512, cleaning swab, 1513, second limit screw, 1514, cleaning swab support, 1515, second cylinder, 1516, set screw, 1517, fifth screw, 1518, optical coupler baffle, 1519, optical coupler, 1520, sixth screw, 160, sample mixing mechanism, 161, second linear guide rail, 162, seventh screw, 163, third screw, 164, eighth screw, 165. a rotating mechanism 165.1, a lifting rod 165.2, a large synchronous belt pulley, 165.3, a rotating shaft 165.4, a first bearing 165.5, a first bearing seat 165.6, a shell 166, a ninth screw 167, a first synchronous belt 168, a direct current motor connecting piece 169, a small synchronous belt pulley 1610, a first motor 170, a bar code scanning mechanism 171, a mirror supporting frame 172, a bar code scanner mounting seat 173, a mirror 174, a bar code scanner 200, a test tube rotating module 210, a linear motion mechanism 211, a supporting base plate 212, a guide rail connecting piece 213, a third linear guide rail 214, a first support column 215, a fourth cylinder connecting piece 216, a fourth cylinder 220, a rotating power mechanism 221, a second motor 222, a synchronous small belt pulley 223, a second synchronous belt pulley 230, a test tube rack mechanism 231, a handle 232, a test tube rack 233, a test tube 240 and a rotating transmission mechanism, 241. the test tube rack comprises a test tube rack base, 242, a rotating shaft, 243, a spring retainer ring, 244, a second bearing, 245, an upper supporting seat, 246, a synchronous large belt wheel, 247, a second support, 248, a lower supporting seat, 249, a second bearing seat, 2410, a third bearing, 2411, an index plate, 2412, a first optical coupler seat, 2413, a first optical coupler, 2414, an index plate supporting seat, 2415, an origin positioning support, 2416, a second optical coupler, 2417 and a second optical coupler support.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

A multi-well automatic sample introduction apparatus as shown in fig. 1 comprises a rack, and a sample introduction module 100 and a test tube rotation module 200 mounted on the rack, the rack comprising a support base 110 and a vertical support plate 140 fixed on the support base 110 by a first screw 120.

The sample injection module comprises a test tube rotating mechanism 130, a sample injection mechanism 150, a bar code scanning mechanism 170 and a sample blending mechanism 160.

Test tube rotary mechanism 130 includes the friction pad 133 with the tangent setting of test tube directly below the syringe needle to and the fourth drive arrangement of drive friction pad along test tube tangential movement, the friction pad 133 of this embodiment is the rubber pad, and fourth drive arrangement is first cylinder 131, and the cylinder body of first cylinder passes through second screw 132 to be fixed on vertical support plate 140, the end and the friction pad rigid coupling that stretch out of first cylinder.

The sample injection mechanism 150 comprises a first limit screw 151, a sample injection needle fixing seat 152, a sample injection needle 153, a first driving device for driving the sample injection needle 153 to move vertically, a third screw 154, a second cylinder connecting piece 155, a rubber sealing plug 156, a fourth screw 157, a first spring support 158, a first linear guide rail 159, a spring 1510, a second spring support 1511, a cleaning swab 1512, a second limit screw 1513, a cleaning swab support 1514, a set screw 1516, a fifth screw 1517, a light coupling baffle 1518, a light coupling 1519 and a sixth screw 1520, wherein the first driving device is a second cylinder 1515, a cylinder body of the second cylinder is fixed on the vertical support plate 140 through a screw and is connected with the second cylinder connecting piece 155 through a thread, and the second cylinder connecting piece 155 is fixed on the sample injection needle fixing seat 152 through a screw. The sample injection needle 153 is fastened on the sample injection needle fixing seat 152 through a screw, and a rubber sealing plug 156 is arranged at the bottom of the connection between the sample injection needle 153 and the sample injection needle fixing seat 152.

The first linear guide 159 extends vertically and is fixedly connected to the vertical support plate 140 of the rack by a fourth screw 157, the first linear guide is slidably connected with a first slider and a second slider located below the first slider, and a sample injection needle fixing seat 152 for installing a sample injection needle is fixedly arranged on the first slider by a third screw 154.

The cleaning swab 1512 is arranged on the frame and located between the sample injection needle and the test tube, specifically, the cleaning swab 1512 is connected with the cleaning swab support 1514 through a set screw 1516, the second slider is fixedly provided with the cleaning swab support 1514 for installing the cleaning swab 1512, the cleaning swab support 1514 is fixedly connected with the second slider through a fifth screw 1517, the cleaning swab is located on the movement track of the sample injection needle, and the cleaning swab is penetrated when the sample injection needle moves up and down. The cleaning swab support is fixedly connected with a second spring support 1511 through threads, the first spring support 158 is positioned above the second spring support 1511 and fixed on the vertical support plate 140 through threaded connection, the first spring support 158 is connected with the second spring support 1511 through a spring 1510, and two ends of the spring are respectively fixed on the first spring support and the second spring support. The light coupler bezel 1518 is secured to the cleaning swab holder 1514 by screws and the light coupler 1519 is secured to the vertical support plate 140 by sixth screws 1520.

The sample blending mechanism 160 comprises a shell, a second driving device for driving the shell to move vertically, a second linear guide rail 161, a seventh screw 162, an eighth screw 164, a rotating mechanism 165, a ninth screw 166, a first synchronous belt 167, a direct current motor connecting piece 168, a small synchronous belt wheel 169 and a first motor 1610, wherein the second driving device is a third air cylinder 163, the cylinder body of the third air cylinder 163 is fixedly connected with the rack, and the extending end of the third air cylinder is connected with the shell. A second linear guide rail 161 extending vertically is fixedly arranged on the rack, the housing is fixedly connected with a sliding block arranged on the second linear guide rail in a sliding manner, a rotating shaft 165.3 is rotatably connected to the housing 165.6, the first motor 1610 drives the rotating shaft 165.3 to rotate, and the first motor 1610 is a direct current motor. Specifically, the second linear guide 161 is fixed to the vertical support plate 140 by a seventh screw 162; the rotating mechanism 165 is fixed on a sliding block of the second linear guide rail 161 through a screw, the first motor 1610 is fixed on a direct current motor connecting piece 168 through a screw, the direct current motor connecting piece 168 is fixed on the rotating mechanism 165 through a ninth screw 166, and a small synchronous pulley 169 is mounted at the motor shaft end of the first motor 1610 and is connected with the rotating mechanism 165 through a first synchronous belt 167; the rotating mechanism 165 includes a lifting rod 165.1, a large timing pulley 165.2, a rotating shaft 165.3, a first bearing 165.4, a first bearing housing 165.5, and a housing 165.6. The lifting rod 165.1 is located under the sample injection needle, the lifting rod 165.1 is fixed at the upper end of the rotating shaft 165.3 through threaded connection, the lifting rod is coaxial with the rotating shaft, the upper end face of the lifting rod is provided with a placing groove matched with the test tube, the rotating shaft 165.3 is provided with a large synchronous pulley 165.2 and is fixed on the first bearing seat 165.5 through the first bearing 165.4, and the first bearing seat 165.5 is fixed on the shell 165.6 through a screw.

A bar code scanning mechanism 170 facing the test tube is installed on the rack, and the bar code scanning mechanism 170 comprises a reflector support frame 171, a bar code scanner mounting seat 172, a reflector 173 and a bar code scanner 174; the bar code scanner mounting base 172 is fixed to the vertical support plate 140 by screws, the bar code scanner 174 and the mirror support frame 171 are fixed to the bar code scanner mounting base 172 by screws, and the mirror 173 is fixed to the mirror support frame 171 by gluing.

The test tube rotating module 200 includes a linear motion mechanism 210, a rotational power mechanism 220, a test tube rack mechanism 230, and a rotational transmission mechanism 240.

The linear motion mechanism 210 includes a third linear guide rail 213 extending along the transverse direction, a third slider slidably disposed on the third linear guide rail, and a third driving device for driving the third slider to move along the third linear guide rail along the transverse direction, the test tube rack 232 is mounted on the third slider, the third driving device is a fourth cylinder 216, and specifically, the linear motion mechanism 210 of this embodiment further includes a support base plate 211, a guide rail connector 212, a first pillar 214, and a fourth cylinder connector 215. The linear guide rail 213 is fixed to the support base plate 211 by a screw, the guide rail connector 212 is fixed to a slider of the third linear guide rail 213 by a screw, the first support 214 is fixed to the guide rail connector 212 by a screw, the fourth cylinder connector 215 is fixed to the guide rail connector 212 by a screw, and the fourth cylinder 216 is fixed to the support base plate 211 by a screw and connected to the fourth cylinder connector 215.

The rotating power mechanism 220 includes a second motor 221, a small synchronous pulley 222 and a second synchronous belt 223, and the second motor 221 drives the test tube rack to rotate. The test-tube rack mechanism 230 includes handle 231, possess the test-tube rack 232 and the 32 test tubes 233 of 32 test tube support positions, and handle 231 sets firmly in the rotation center department of test-tube rack 232, and 32 test tubes support positions and distribute along circumference, and the test tube supports the position and is located between appearance needle and the lifter on vertical direction. The rotary transmission mechanism 240 comprises a test tube rack base 241, a rotating shaft 242, a spring retainer 243, a second bearing 244, an upper support seat 245, a synchronous large belt wheel 246, a second support column 247, a lower support seat 248, a second bearing seat 249, a third bearing 2410, an index plate 2411, a first optical coupler seat 2412, a first optical coupler 2413, an index plate support seat 2414, an origin positioning support 2415, a second optical coupler 2416 and a second optical coupler support seat 2417. The test tube rack base 241 is fixed at one end of the rotating shaft 242 through a screw, the rotating shaft 242 is respectively fixed on an upper supporting seat 245 and a bearing seat 249 through a second bearing 244 and a third bearing 2410 and is axially limited through a spring retainer 243, the upper supporting seat 245 is connected with a lower supporting seat 248 through a second support column 247, a synchronous large belt wheel 246 is connected with the rotating shaft 242 and is axially limited through a set screw, the lower supporting seat 248 is fixed on a first support column 214 through a screw, the second supporting seat 249 is fixed on the lower supporting seat 248 through a screw, an index plate 2411 is connected with the rotating shaft 242 and is fixed through an index plate supporting seat 2414, a first light coupler 2413 is fixed on a first light coupler seat 2412 through a screw, the first light coupler 241seat 2 is fixed on the lower supporting seat 248 through a screw, an origin positioning support 2415 is fixed on the index plate 2411 through a screw, a second light coupler 2416 is fixed on a second light coupler, the second optical coupler holder 2417 is fixed to the lower support base 248 by a screw. The optical coupler adopts the prior art, the index plate is provided with openings which correspond to the positions of the test tubes one by one, and when the openings on the index plate pass through the optical coupler, one end of the optical coupler receives an optical signal sent by the other end; when the opening on the graduated disk leaves the opto-coupler, the signal that the opto-coupler sent can be sheltered from by the graduated disk, and the opto-coupler can't receive light signal. Through the existence of opto-coupler signal, can detect the position at test tube place, and then guarantee that the test tube is in under the appearance needle.

The sample introduction device of the embodiment realizes an automatic sample introduction process through the rotation motion of the test tube rack 232 around the central axis and the linear motion of the sample introduction needle 153 in the vertical direction, and realizes a sample mixing function through the rapid rotation of the test tube 233 around the central axis; the swab 1512 is cleaned to clean the injection needle 153, so as to prevent cross contamination; the scanning and registration of the sample information are completed by the barcode scanner 174. The sample injection method using the multi-hole automatic sample injection device of the embodiment comprises the following steps:

a. the fourth cylinder 216 acts to push the test tube rack 232 to move outwards along the third linear guide rail 213 through the fourth cylinder connecting piece 215, and the experimenter replaces the sample to be tested by replacing the test tube rack 232;

b. the fourth cylinder 216 acts in the reverse direction to push the replaced test tube rack 232 to move inwards along the third linear guide rail 213 until the circle of the test tube support position is located right below the sample injection needle;

c. the second motor 221 works, drives the test tube rack to rotate through the small synchronous belt pulley 222, the second synchronous belt 223 and the rotary transmission mechanism 240, and stops after rotating one test tube 233 filled with a sample to be detected right below the sample injection needle 153;

d. the first cylinder 131 drives the friction pad to reciprocate left and right, the test tube positioned right below the sampling needle is pushed to rotate by using the friction force between the friction pad and the test tube, in the process of rotating the test tube, the bar code adhered to the test tube can rotate to the working range of the bar code scanner 174 at a certain moment, and the bar code on the test tube is scanned by the bar code scanner 174 and the sample information is recorded;

e. the third cylinder 163 starts to work, the shell and the whole rotating mechanism are driven to move upwards, so that the test tube enters the placing groove, the lifting rod supports the test tube to move upwards, then the first motor 1610 works, the rotating shaft 165.3 is driven to rotate through synchronous belt transmission, and the lifting rod drives the test tube to rotate to uniformly mix the samples;

f. stopping the first motor 1610, starting the operation of the cleaning swab 1512 and the second cylinder 1515, driving the sample injection needle 153 to pass through the cleaning swab 1512 downwards by the second cylinder connecting piece by the second cylinder 1515, moving the cleaning swab 1512 to the bottom of the test tube for sample suction, completing the cleaning of the sample injection needle 153 by the cleaning swab 1512, after the sample suction is completed, reversely moving the first driving device to drive the sample injection needle 153 to pass through the cleaning swab 1512 upwards and move to the upper part of the cleaning swab, cleaning the sample injection needle 153 again by the cleaning swab 1512, and finishing the operation of the second cylinder 1515 and the cleaning swab 1512;

g. the third cylinder 163 starts to work reversely, the outer shell and the whole rotating mechanism are driven to move downwards, so that the test tube is supported on the test tube rack, the third cylinder 163 stops working, and the sample injection is completed for the time.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims (9)

1. The utility model provides a porous autoinjection device which characterized in that: comprises a frame, and a sample introduction module (100) and a test tube rotating module (200) which are arranged on the frame;

the sample injection module comprises a sample blending mechanism (160), a sample injection needle (153) and a first driving device for driving the sample injection needle (153) to move along the vertical direction;

the sample blending mechanism (160) comprises a shell, a second driving device for driving the shell to move vertically, a rotating shaft (165.3) rotationally connected to the shell (165.6), and a first motor (1610) for driving the rotating shaft (165.3) to rotate, wherein a lifting rod (165.1) positioned right below the sample injection needle is coaxially and fixedly connected to the rotating shaft, and a placing groove matched with the test tube is formed in the upper end face of the lifting rod;

test tube rotation module (200) include test-tube rack (232) and drive test-tube rack pivoted second motor (221), be equipped with on the test-tube rack along a plurality of test tubes support positions that circumference distributes, the test tube supports the position and is located between appearance needle and the lifter on vertical direction.

2. The multi-hole automatic sample feeding device according to claim 1, characterized in that: the frame is also provided with a cleaning swab (1512) positioned between the sample injection needle and the test tube.

3. The multi-hole automatic sample feeding device according to claim 2, characterized in that: a first linear guide rail (159) extending along the vertical direction is fixedly connected to the rack, a first sliding block and a second sliding block positioned below the first sliding block are slidably connected to the first linear guide rail, a sample injection needle fixing seat (152) for installing a sample injection needle is fixedly arranged on the first sliding block, and a cleaning swab bracket (1514) for installing a cleaning swab (1512) is fixedly arranged on the second sliding block;

a second spring support (1511) is fixedly connected to the cleaning swab support, a first spring support (158) located above the second spring support (1511) is fixedly connected to the rack, and the first spring support (158) is connected with the second spring support (1511) through a spring (1510).

4. The multi-hole automatic sample feeding device according to claim 3, characterized in that: the bottom of the connection of the sample injection needle (153) and the sample injection needle fixing seat (152) is provided with a rubber sealing plug (156).

5. The multi-hole automatic sample feeding device according to claim 1, characterized in that: the device also comprises a friction pad (133) which is arranged in a tangent way with the test tube right below the sample injection needle, and a fourth driving device which drives the friction pad to move along the tangential direction of the test tube; a bar code scanning mechanism (170) facing the test tube is arranged on the machine frame.

6. The multi-hole automatic sample feeding device according to claim 5, characterized in that: the bar code scanning mechanism (170) comprises a reflector support frame (171), a bar code scanner mounting seat (172), a reflector (173) and a bar code scanner (174);

the bar code scanner mounting seat (172) is fixed on the frame, the bar code scanner (174) and the reflector support frame (171) are both fixed on the bar code scanner mounting seat (172), and the reflector (173) is fixed on the reflector support frame (171) through gluing.

7. The multi-hole automatic sample feeding device according to claim 1, characterized in that: the rack is also provided with a third linear guide rail (213) extending along the transverse direction, a third slide block arranged on the third linear guide rail in a sliding way, and a third driving device for driving the third slide block to move along the transverse direction of the third linear guide rail, and the test tube rack (232) is arranged on the third slide block.

8. The multi-hole automatic sample feeding device according to claim 1, characterized in that: a second linear guide rail (161) extending vertically is fixedly arranged on the frame, and the shell is fixedly connected with a sliding block arranged on the second linear guide rail in a sliding manner.

9. The multi-hole automatic sample feeding device according to claim 1, characterized in that: the rotation center of the test tube rack (232) is fixedly provided with a handle (231).

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