Double-sample-arm sampling mechanism and detection instrument

Abstract

The invention belongs to the technical field of medical instrument detection, and provides a sampling mechanism with double sample arms, which mainly comprises a first sampling needle and a second sampling needle which are mutually independently driven, the first sampling needle is arranged at one end of the first lifting rod, the second sampling needle is arranged at one end of the second lifting rod, the first lifting rod can drive the first sampling needle to rotate and lift, a first auxiliary support arm is arranged on the first lifting rod, and the first sampling needle movably penetrates through the first auxiliary support arm; the cleaning assembly comprises a first cleaning bin, a first liquid inlet of the first cleaning bin is located below the first liquid outlet, the first liquid inlet is eccentrically arranged, and meanwhile the liquid outlet direction of the first cleaning bin inclines upwards. By the adoption of the structure, selective sampling of the sampling needles can be conducted for different sampling tubes, the sampling requirements of two sampling tubes of different structures at present are met, meanwhile, by arranging the cleaning assembly, the first sampling needle can be cleaned and soaked completely, and it can be avoided that cleaning liquid drips from the lower end of the first sampling needle to pollute an instrument or a sample.

Description

Technical Field

[0001] The invention belongs to the field of medical device sample detection, and particularly relates to a double-sample arm sampling mechanism and a detection instrument. Background Art

[0002] The fully automatic specific protein analyzer is a common instrument in the field of medical testing. It is usually used to perform various tests on human samples such as whole blood, serum, plasma, peripheral blood, urine, cerebrospinal fluid, and stool lysate. Before the sample test, the sample is usually placed in a sample tube and automatically transferred to the test instrument through the track of the test instrument for testing.

[0003] In order to meet the detection and storage requirements of different samples, there are usually two types of sampling tubes on the market, one with a rubber stopper and the other with an open sample tube without a rubber stopper. When two different sample tubes appear on a detection instrument at the same time, the existing sampling needles are mostly without a puncture structure and cannot meet the needs of puncture detection sampling. Therefore, it is necessary for those skilled in the art to improve the existing sampling needle structure to meet the sampling requirements of the two different sampling tubes. Summary of the invention

[0004] The present invention provides a double-sample arm sampling mechanism, which solves the problem of how to sample two sampling tubes with different structures using the same detection instrument in the above technical background.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A double sample arm sampling mechanism, comprising:

[0007] a first bracket and a second bracket;

[0008] A first lifting rod is arranged on the first bracket, the first lifting rod can be lifted and lowered along its own axis and can rotate around its own axis, a first support arm is arranged at the free end of the first lifting rod, one end of the first support arm is connected to the free end of the first lifting rod, and a first sampling needle is arranged at the other end of the first support arm, the first sampling needle is provided with a puncture needle tip and a first through groove, the first through groove is arranged on the outer wall of the first sampling needle, the first through groove is provided with a preset length, and the axis of the first sampling needle is arranged parallel to the axis of the first lifting rod;

[0009] a first auxiliary support arm, sleeved on the first lifting rod, the first auxiliary support arm can rotate synchronously with the first lifting rod, and the first auxiliary support arm is arranged parallel to the first support arm;

[0010] A cleaning assembly, comprising a first cleaning chamber detachably arranged on the first auxiliary support arm, the first cleaning chamber being provided with a first cleaning cavity, a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet being both connected to the first cleaning cavity, the first liquid inlet being located below the first liquid outlet, the first liquid inlet being eccentrically arranged relative to the first cleaning chamber, and the liquid outlet direction of the first liquid inlet being inclined upward relative to the horizontal plane where the first liquid inlet is located, wherein the puncture needle tip of the first sampling needle passes through the first cleaning chamber, and the first sampling needle can move relative to the first cleaning chamber;

[0011] A second lifting rod is arranged on the second bracket, and the second lifting rod can be lifted and lowered along its own axis and can rotate around its own axis. A second support arm is provided at the free end of the second lifting rod, one end of the second support arm is connected to the free end of the lifting rod, and a second sampling needle is provided at the other end of the second support arm. The axis of the second sampling needle is arranged parallel to the axis of the second lifting rod, wherein the second lifting rod is arranged parallel to the first lifting rod.

[0012] In some embodiments, the first auxiliary support arm is provided with a through first fixing hole, the first cleaning chamber is provided with a first fixed end and a second fixed end, the outer diameter of the first fixed end is smaller than the outer diameter of the second fixed end, the outer diameter of the first fixed end is not larger than the inner diameter of the first fixing hole, the outer diameter of the second fixed end is larger than the inner diameter of the first fixing hole, a first annular groove is provided on the first fixed end, and a first adaptable and detachable elastic fixing block is provided on the first annular groove, when the first elastic fixing block is clamped in the first annular groove, the first elastic fixing block abuts against the first auxiliary support arm, and the second fixed end abuts against the first auxiliary support arm.

[0013] In some embodiments, the first cleaning chamber is provided with a first sealing block, which seals the first cleaning chamber. The first sealing block is provided with a through first supporting hole, the inner diameter of the first supporting hole is adapted to the outer diameter of the first sampling needle, the first supporting hole and the first sampling needle are coaxially arranged, and the first sampling needle is movably inserted into the first supporting hole.

[0014] In some embodiments, an anti-collision mechanism is further included on the first arm, the anti-collision mechanism includes a first base fixedly disposed on the first arm, a first guide column, a first limit column and a first spring;

[0015] The first base is provided with a first guide hole adapted to the first guide column, the first guide column is movably inserted into the first guide hole, the first limiting column is arranged on the first base and is arranged parallel to the first guide column, the first spring is sleeved on the first limiting column, a first limiting boss is arranged at one end of the first guide column close to the first base, the first limiting boss is movably inserted into the first limiting column, one end of the first spring abuts against the first limiting boss, and the other end of the first spring abuts against one end of the first limiting column;

[0016] The first guide column is provided with a first guide channel, the puncture needle tip of the first sampling needle passes through the first guide channel, the first sampling needle is fixedly arranged on the first guide column, and the first guide column and the first sampling needle are arranged coaxially;

[0017] The anti-collision mechanism also includes a limiting optical coupler and a photosensitive baffle. The limiting optical coupler is provided with a photosensitive groove. The limiting optical coupler is arranged on the first arm. The photosensitive baffle is arranged on the first limiting boss. In the initial position, the photosensitive baffle is located in the photosensitive groove.

[0018] In some embodiments, it also includes a first lifting assembly disposed on the first bracket, the first lifting assembly including a first driving motor, a first transmission assembly and a first lifting block disposed on the bracket, the first lifting block is connected to the first lifting rod, the moving direction of the first lifting block is consistent with the axial direction of the first lifting rod, and the first lifting block is connected to the first driving motor through the first transmission assembly.

[0019] In some embodiments, the first transmission assembly includes a first driving pulley, a first driven pulley, a first synchronous belt and a first limiting shaft, the first driving pulley is arranged on the output shaft of the first drive motor, the first driven pulley is rotatably arranged on the first bracket, the first synchronous belt is wound around the first driving pulley and the first driven pulley, the first limiting shaft is movably arranged on the first bracket, the axis of the first limiting shaft is consistent with the axis direction of the first lifting rod, the first lifting block is sleeved on the first limiting shaft, and the first limiting block is connected to the first synchronous belt.

[0020] In some embodiments, the invention further comprises a first rotating assembly, wherein the first rotating assembly comprises a second driving motor, a second driving pulley disposed at an output end of the second driving motor, a second driven pulley, a second synchronous belt wound around the second driving pulley and the second driven pulley, and a second rotating disk, wherein the second driven pulley is fixedly connected to the second rotating disk, and the second rotating disk is rotatably disposed on the first bracket;

[0021] The second driven pulley and the second rotating disk are both provided with a first channel adapted to the first lifting rod, the first lifting rod is inserted into the first channel, the first lifting rod can move up and down relative to the first channel and rotate synchronously with the second driven pulley; the rotation axis of the second rotating disk coincides with the axis of the first lifting rod;

[0022] The first lifting block is provided with a first rotating disk, the first bracket is provided with a third rotating disk, and one end of the first limiting column passes through the first rotating disk and is connected to the third rotating disk, so that the first limiting column can rotate synchronously with the first lifting rod.

[0023] In some embodiments, the first lifting rod is provided with a first limiting boss, and the first channel is provided with a first limiting groove, or the first lifting rod is provided with a first limiting groove, and the first channel is provided with a first limiting boss, the length direction of the first limiting boss is consistent with the axial direction of the first lifting rod, the first limiting groove is adapted to the first limiting boss, the first limiting boss is clamped in the first limiting groove, and the moving distance of the first limiting boss in the first limiting groove is not less than the moving distance of the first sampling needle.

[0024] In some embodiments, it also includes a second lifting assembly and a second rotating assembly, the second lifting assembly is provided with a second lifting block, the second lifting rod is connected to the second lifting block, wherein the second lifting assembly has the same structure as the first lifting assembly, the second rotating assembly has the same structure as the first rotating assembly, and the second arm is bent.

[0025] In some embodiments, the present invention also provides a detection instrument, comprising the dual sample arm sampling mechanism described in each of the above embodiments; a mounting base, the first support and the second support are arranged on the mounting base, wherein a second cleaning chamber is provided on the mounting base, and the rotation radius of the second sampling needle is the same as the distance between the second cleaning chamber and the axis of the second lifting rod.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention sets a first lifting rod, sets a first support arm at one end of the first lifting rod, sets a first sampling needle at one end of the first support arm, combines with a first auxiliary support arm sleeved on the first lifting rod, sets a puncture needle tip on the first sampling needle, and the first sampling needle is movably inserted on the first auxiliary support arm. Combined with the auxiliary guidance and support of the first auxiliary support arm to the first sampling needle, the first sampling needle has puncture ability and can perform puncture sampling. At the same time, in conjunction with the second sampling needle, selective sampling can be performed according to the actual structure of the sampling tube to meet the sampling requirements of different sampling tubes.

[0028] 2. The present invention sets a cleaning component on the first auxiliary support arm, and the cleaning component includes a first cleaning chamber, and a first liquid inlet and a first liquid outlet are provided on the first cleaning chamber, wherein the first liquid inlet is located below the first liquid outlet, so that the outer wall of the first sampling needle is completely immersed and cleaned, and at the same time, the first liquid inlet is eccentrically arranged relative to the first cleaning chamber, and the liquid outlet direction of the first liquid outlet is inclined upward, so as to ensure that the cleaning liquid is in a spiral shape in the first cleaning chamber, which is convenient for cleaning the first sampling needle, and avoids the cleaning liquid from flowing out from below the first cleaning chamber, and avoids the dripping of sewage after cleaning to cause environmental pollution.

[0029] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a stereoscopic diagram of the assembly of a double sample arm sampling mechanism of the present invention;

[0031] Figure 2 It is a structural explosion diagram of the first cleaning chamber of the present invention;

[0032] Figure 3 It is a cross-sectional view of the internal structure of the first cleaning chamber of the present invention;

[0033] Figure 4 It is an assembly stereogram of the anti-collision mechanism of the present invention;

[0034] Figure 5 An exploded view of the anti-collision mechanism of the present invention;

[0035] Figure 6 It is a cross-sectional view of the internal structure of the anti-collision mechanism of the present invention;

[0036] Figure 7 is a first schematic diagram of the transmission structure of the first lifting rod of the present invention;

[0037] Figure 8 is a second schematic diagram of the transmission structure of the first lifting rod of the present invention;

[0038] Fig. 9 It is a cross-sectional view of the rotation structure of the first lifting rod of the present invention;

[0039] Fig.10 It is a schematic diagram of another transmission mode of the transmission structure of the first lifting rod of the present invention. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with specific drawings. In the description of this embodiment, unless otherwise specified, the terms "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the present application must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0041] like Figure 1 As shown, a double-sample arm sampling mechanism provided by the present invention mainly includes a first bracket 100 and a second bracket 200. A first lifting rod 101 is arranged on the first bracket 100. A first support arm 102 is arranged at a free end of the first lifting rod 101. One end of the first support arm 102 is connected to the free end of the first lifting rod 101. A first sampling needle 103 is arranged at the other end of the first support arm 102. The axis of the first sampling needle 103 is consistent with the axis direction of the first lifting rod 101. A puncture needle tip 1031 is arranged at one end of the first sampling needle 103 away from the first support arm 102. The puncture needle tip 1031 is used to puncture a sampling tube equipped with a rubber stopper; further, in order to ensure that the air pressure inside and outside the sampling tube is balanced during the puncture sampling process, a first through groove 1032 is arranged on the outer wall of the first sampling needle 103. When the first sampling needle 103 punctures and samples, the first through groove 1032 connects the sampling tube and the outside world to balance the air pressure, reduce resistance, and facilitate sampling. Furthermore, a first auxiliary arm 104 is sleeved on the first lifting rod 102, and the first auxiliary arm 104 can rotate synchronously with the first lifting rod 101, and the first lifting rod 101 can move in its own axial direction relative to the first auxiliary arm 104, and a preset distance is set between the first auxiliary arm 104 and the first arm 102, when the first lifting rod 101 rises to the limit position, the puncture needle tip 1031 of the first sampling needle 103 is just located at the first auxiliary arm 104;

[0042] Furthermore, if Figure 2 and Figure 3As shown, a cleaning assembly is arranged on the first auxiliary arm 104, so that the first sampling needle 103 does not need to be cleaned in a cleaning pool at a fixed position, and the positioning between the first cleaning needle 103 and the cleaning pool can be avoided, thereby simplifying the cleaning process, shortening the cleaning time, and improving the sampling efficiency. Specifically, the cleaning assembly includes a first cleaning chamber 1041, which is arranged on the first auxiliary arm 104, and the first cleaning chamber 1041 is provided with a first cleaning cavity 104121. A first liquid inlet 104122 and a first liquid outlet 104123 are arranged on the side wall of the first cleaning chamber 10411, and the first liquid inlet 104122 and the first liquid outlet 104123 are both connected to the first cleaning cavity 104121, and the first liquid inlet 104122 is used for inputting cleaning liquid, and the first liquid outlet 104123 is used for discharging waste liquid. Among them, the first liquid inlet 104122 and the first liquid outlet 104123 are provided with a height difference, and the first liquid inlet 104122 is located below the first liquid outlet 104123. At the same time, the first liquid inlet 104122 is eccentrically arranged relative to the first cleaning chamber 104121. At the same time, the liquid outlet direction of the first liquid inlet 104122 is inclined upward relative to the horizontal plane where it is located. The first sampling needle 103 is movably arranged in the first cleaning chamber 104121. The part of the first cleaning needle 103 immersed in the sample tube during liquid collection can be completely located in the first cleaning chamber 104121 to ensure that the cleaning is in place. It should be pointed out that when the above-mentioned first lifting rod 101 is in the extreme position, the part of the outer wall of the first sampling needle 103 that needs to be cleaned is just located in the first cleaning chamber 104121;

[0043] In this embodiment, by setting the first liquid inlet 104122 below the first liquid outlet 104123, it is ensured that the first sampling needle 103 can be completely immersed. At the same time, by eccentrically setting the first liquid inlet 104122, the cleaning liquid is spirally arranged in the first cleaning chamber 104121, so that the first sampling needle 103 is immersed and cleaned in place, and the first sampling needle 103 is continuously stirred and cleaned. The liquid outlet direction of the first liquid inlet 104123 is tilted upward, so that the cleaning liquid flows out from bottom to top, and the cleaning liquid is prevented from dripping from the bottom of the first cleaning chamber 104121, which effectively avoids contamination of samples or reagents, and at the same time ensures the cleanliness of the detection instrument and prevents the sample from dripping onto the detection instrument.

[0044] The second lifting rod 201 is arranged on the second bracket 200, and is used to absorb the sample from the uncovered sample tube, wherein the second lifting rod 201 can be axially lifted and lowered along its own axis, and can rotate around its own axis, so as to complete the absorption and addition of the sample. A second arm 202 is arranged at the free end of the second lifting rod 201, and a second sampling needle 203 is arranged at one end of the second arm 202, and the axial direction of the second sampling needle 203 is arranged parallel to the axis of the second lifting rod 201, wherein the second lifting rod 201 is arranged parallel to the first lifting rod 101.

[0045] The present invention can selectively sample sampling tubes with rubber stoppers and open sampling tubes by providing a first sampling needle 103 with a puncture function and a second sampling needle 203 for ordinary sampling, thereby meeting the sampling requirements of sample tubes with different structures. While meeting the sampling requirements, since the first sampling needle 103 needs to provide a first auxiliary arm 104 to ensure the stability of the puncture, in order to reduce the time spent on cleaning the first sampling needle 103, a first cleaning chamber 1041 is provided on the first auxiliary arm 104. After the first sampling needle 103 completes the sampling and adding action, the first lifting rod 101 is directly moved upward, driving the part of the first sampling needle 103 that needs to be cleaned to be located in the first cleaning chamber 104121 of the first cleaning chamber 1041 for direct cleaning, thereby avoiding repeated positioning, rotation, lifting and other procedures, saving cleaning time, and improving sampling efficiency.

[0046] In one embodiment, Figure 3As shown, in order to facilitate the detachable connection of the first cleaning chamber 1041 relative to the first auxiliary support arm 104, so as to realize the cleaning of the first cleaning chamber 1041 and facilitate the assembly of the first cleaning chamber 1041, a through first fixing hole 1042 is provided on the first auxiliary support arm 104, and the first cleaning chamber 1041 includes a first fixed end 10411 and a second fixed end 10412, wherein the outer diameter of the first fixed end 10411 is smaller than but not larger than the inner diameter of the first fixing hole 1042. In this embodiment, the inner diameter of the first fixing hole 1042 is matched with the outer diameter of the first fixing end 10411, so as to avoid the first fixing end 10411 from shaking relative to the first auxiliary support arm 104. The outer diameter of the second fixed end 10412 is larger than the inner diameter of the first fixed hole 1043, and the outer diameter of the second fixed end 10412 is larger than the outer diameter of the first fixed end 10411, wherein a first annular groove 104112 is provided on the first fixed end 10411, and a first elastic fixing block 10413 adapted to the groove width is provided on the first annular groove 104112. In this embodiment, the first elastic fixing block 10413 is a C-shaped structure, for example, the first elastic fixing block 10413 can be composed of an elastic steel sheet or an elastic plastic plate. When the first elastic fixing block 104 When the first elastic fixing block 10413 is clamped on the first annular groove 104112, the first elastic fixing block 10413 abuts against the first annular groove 104112, the first elastic fixing block 10413 abuts against the upper end surface of the first auxiliary support arm 104, and the second fixed end 10412 abuts against the lower end surface of the first auxiliary support arm 104, that is, the distance between the first elastic fixing block 10413 and the second fixed end 10412 is consistent with the thickness of the first auxiliary support arm 104 at the first fixing hole 1042, thereby axially limiting and radially limiting the first cleaning chamber 1041. Optionally, the first elastic fixing block 10413 can also be a U-shaped structure.

[0047] Further, in order to facilitate the assembly between the first cleaning chamber 1041 and the first sampling needle 103, a first sealing block 104111 is provided on the first cleaning chamber 1041, and the first sealing block 104111 seals the first cleaning chamber 1041, thereby forming a sealed first cleaning chamber 104121. A through first supporting hole is provided on the first sealing block 104111, the inner diameter of the first supporting hole is adapted to the outer diameter of the first sampling needle 103, the first supporting hole is coaxially arranged with the first sampling needle 103, and the first sampling needle 103 is movably arranged on the first supporting hole. In this embodiment, the first sealing block 104111 is a cylindrical strip structure, thereby increasing the contact surface between the first sampling needle 103 and the first sealing block 104111, and providing stable support. Preferably, a rubber material is provided at the contact point between the first sealing block 104111 and the first sampling needle 103, which ensures sealing on the one hand, and facilitates the movement of the first sampling needle 103 relative to the first cleaning chamber 1041 on the other hand.

[0048] In one embodiment, Figure 4-Figure 6 As shown, it also includes an anti-collision mechanism arranged on the first support arm 102, and the anti-collision mechanism is mainly used to prevent the first sampling needle from piercing the 103 inaccurately, resulting in damage to the first sampling needle 103. Specifically, the anti-collision mechanism includes a first base 10211, a first guide column 10216, a first limit column 10213 and a first spring 10214. The first base 10211 is fixedly arranged on the first support arm 102, and a first guide hole 102111 adapted to the first guide column 10216 is provided on the first base 10211. The first guide column 10216 is movably inserted into the first guide hole 102111, and the first limit column 10213 is arranged on the first base 10211, and the first limit column 10213 is arranged parallel to the first guide column 10216. The first spring 10214 is sleeved on the first limit column 10213. One end of the first spring 10214 abuts against one end of the first limiting column 10213, a first limiting boss 10212 is provided at one end of the first guide column 10216, the first limiting boss 10212 can abut against the first base 10211, and the first limiting boss 10212 is sleeved on the first limiting column 10213, and the other end of the first spring 10214 abuts against the first limiting boss 10212; in this embodiment, there are two first limiting columns 10213, which can effectively limit the first limiting boss 10212 so that it can only move in a straight line;

[0049] A first guide channel is provided on the first guide column 10216, and a portion of the first sampling needle 103 is provided in the first guide channel, wherein the first sampling needle 103 is fixedly provided relative to the first guide column 10216, and the first guide column 10216 and the first sampling needle 103 are provided coaxially;

[0050] The anti-collision mechanism also includes a limit optical coupler 10217 and a photosensitive baffle 10215. The limit optical coupler 10217 is arranged on the first arm 102. The limit optical coupler 10217 is provided with a photosensitive groove. The photosensitive baffle 10215 is arranged on the first limit boss 10212. In the initial position, the photosensitive baffle 10215 is located in the photosensitive groove. When the first sampling needle 103 fails to puncture, the first sampling needle 103 will be lifted up, driving the first guide column 10213 to move axially, and compressing the first spring 10214 at the same time. When the photosensitive baffle 10215 is separated from the photosensitive groove, the first guide column 10216 stops moving up, and the first sampling needle stops moving up. At this time, the first lifting rod 101 moves up, and the first sampling needle 103 is reset under the action of the first spring. The first sampling needle 103 is repositioned for puncture sampling. It should be particularly pointed out that the resistance brought by the rubber stopper to the first sampling needle is much smaller than the elastic force applied to the first sampling needle 103 by the first spring 10214, so that the first sampling needle 103 can puncture and sample smoothly.

[0051] In one embodiment, it also includes a first lifting assembly disposed on the first bracket 100, such as Figure 7 and Figure 8 As shown, the first lifting assembly includes a first driving motor 401, a first transmission assembly and a first lifting block 405 arranged on the first bracket 100. The first lifting block 405 is connected to the first lifting rod 101. The moving direction of the first lifting block 405 is consistent with the axial direction of the first lifting rod 101. The first lifting block 405 is connected to the first driving motor 401 through the first transmission assembly.

[0052] Specifically, Figure 8 As shown, the first transmission assembly includes a first driving pulley 402, a first driven pulley 404, a first synchronous belt 403 and a first limiting shaft 407. The first driving pulley 402 is arranged on the output shaft of the first drive motor 401, the first driven pulley 404 is rotatably arranged on the first bracket 100, the first synchronous belt 403 is wound around the first driving pulley 402 and the first driven pulley 404, the first limiting shaft 407 is rotatably arranged on the first bracket 100, the axis of the first limiting shaft 407 is consistent with the axis direction of the first lifting rod 101, and the first lifting block 405 is sleeved on the first limiting shaft 407 and connected to the first synchronous belt 403.

[0053] Optionally, the synchronous belt and synchronous pulley structure can be replaced by a screw nut structure, such as Fig.10 As shown, a rotatable first screw rod 120 is provided on the first bracket 100, and an adaptable first nut 121 is provided on the first screw rod 120, the first nut 121 is connected to the first lifting block 405, and the first lifting block 405 is rotatably connected to the first lifting rod 101, and can only perform axial movement in conjunction with the limiting function of the first lifting rod 101 itself, and can also realize axial movement of the first lifting rod 101.

[0054] Furthermore, it also includes a first rotating assembly, which includes a second driving motor 301, a second driving pulley 302 arranged at the output end of the second driving motor 301, a second driven pulley 304, a second synchronous belt 303 wound around the second driving pulley 302 and the second driven pulley 304, and a second rotating disk 111, the second driven pulley 304 is fixedly connected to the second rotating disk 111, and the second rotating disk 111 is rotatably arranged on the first bracket 100;

[0055] The second driven pulley 304 and the second rotating disk 111 are both provided with a first channel adapted to the first lifting rod 101. The first lifting rod 101 is inserted into the first channel. The first lifting rod 101 can move up and down relative to the first channel and rotate synchronously with the second driven pulley 204. The rotation axis of the second rotating disk 111 coincides with the axis of the first lifting rod 101.

[0056] The first lifting block 405 is provided with a first rotating disk 406, the first bracket 100 is provided with a third rotating disk 110, and one end of the first limiting column 407 passes through the first rotating disk 406 and is connected to the third rotating disk 110, so that the first limiting column 407 can rotate synchronously with the first lifting rod 101. In this embodiment, the first rotating disk 406, the second rotating disk 111 and the third rotating disk 110 are all connected to the first support 100 through balls to reduce friction during rotation. Optionally, the first rotating disk 406, the second rotating disk 111 and the third rotating disk 110 can also be rotatably connected to the first bracket 100 through an annular protrusion and an annular slot structure.

[0057] In one embodiment, Fig. 9 As shown, in order to ensure that the first lifting rod 101 can reciprocate in the axial direction relative to the second driven pulley 304 and at the same time can rotate with the second driven pulley 304, a first limiting groove 1011 is set in the first channel, and a first limiting boss 1043 is set on the first lifting rod 101. The length direction of the first limiting boss 1043 is consistent with the axis of the first lifting rod 101, and the first limiting groove 1011 and the first limiting boss 1043 are adapted in shape. The first limiting boss 1043 is clamped in the first limiting groove 1011, wherein the distance moved by the first limiting boss 1043 in the first limiting groove 1011 is not less than the moving distance required for the first sampling needle 103 to take samples, thereby ensuring that the first limiting boss 1043 will not separate from the first limiting groove 1011.

[0058] Optionally, a first limiting groove 1011 may be provided on the first lifting rod 101, and a first limiting boss 1043 may be provided in the first channel. In this case, the size of the first limiting boss 1043 is not limited, and only the first limiting groove 1011 needs to meet the length requirements.

[0059] Optionally, an elastic rubber member may be provided in the first channel to increase the friction between the first channel and the first lifting rod 101 , so that the first lifting rod 101 can rotate synchronously with the second driven pulley 304 .

[0060] Furthermore, in order to prevent the first lifting assembly from overtravelling, an optical coupler at two extreme movement positions of the first lifting block 405 is provided on the first bracket 100, and a first light blocking sheet is provided on the first lifting block 405, and the first light blocking sheet moves between the optical couplers at the two extreme movement positions.

[0061] A second light shielding plate is arranged on the second driven pulley 304 to rotate synchronously, two optical couplers are arranged on the first bracket 100 at the rotation limit positions of the first lifting rod 101, and the second light shielding plate rotates between the two optical couplers to prevent the first lifting rod 101 from over-rotating.

[0062] In one embodiment, it also includes a second lifting assembly for lifting and moving the second lifting rod 201 and a second rotating assembly for rotating the second lifting rod 201. The second lifting assembly is provided with a second lifting block, and one end of the second lifting rod 201 is connected to the second lifting block. It should be noted that the second lifting assembly has the same structure as the first lifting assembly, and the second rotating assembly has the same structure as the first rotating assembly, which will not be described in detail here. Due to the tight structure, in order to make way, the second arm 202 is bent to ensure that the second sampling needle 203 does not touch the first lifting rod 101 when adding samples.

[0063] In one embodiment, the present invention further provides a detection instrument, including the double sample arm sampling mechanism of each of the above embodiments; a mounting base, the first bracket 100 and the second bracket 200 are both arranged on the mounting base, and a second cleaning chamber is arranged on the mounting base, and the distance between the second cleaning chamber and the axis of the second lifting rod 201 is consistent with the rotation radius of the second sampling needle 203, so that the second sampling needle 201 can be positioned above the second cleaning chamber during the rotation process, and then the part of the second sampling needle 203 that needs to be cleaned can be moved to the second cleaning chamber by descending the second lifting rod 201.

[0064] The above is only a preferred embodiment of the present invention. It should be noted that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A dual sample arm sampling mechanism, characterized in that: include: a first bracket and a second bracket; A first lifting rod is arranged on the first bracket, the first lifting rod can be lifted and lowered along its own axis and can rotate around its own axis, a first support arm is arranged at the free end of the first lifting rod, one end of the first support arm is connected to the free end of the first lifting rod, and a first sampling needle is arranged at the other end of the first support arm, the first sampling needle is provided with a puncture needle tip and a first through groove, the first through groove is arranged on the outer wall of the first sampling needle, the first through groove is provided with a preset length, and the axis of the first sampling needle is arranged parallel to the axis of the first lifting rod; a first auxiliary support arm, sleeved on the first lifting rod, the first auxiliary support arm can rotate synchronously with the first lifting rod, and the first auxiliary support arm is arranged parallel to the first support arm; A cleaning assembly, comprising a first cleaning chamber detachably arranged on the first auxiliary support arm, the first cleaning chamber being provided with a first cleaning cavity, a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet being both connected to the first cleaning cavity, the first liquid inlet being located below the first liquid outlet, the first liquid inlet being eccentrically arranged relative to the first cleaning chamber, and the liquid outlet direction of the first liquid inlet being inclined upward relative to the horizontal plane where the first liquid inlet is located, wherein the puncture needle tip of the first sampling needle passes through the first cleaning chamber, and the first sampling needle can move relative to the first cleaning chamber; A second lifting rod is arranged on the second bracket, and the second lifting rod can be lifted and lowered along its own axis and can rotate around its own axis. A second support arm is provided at the free end of the second lifting rod, one end of the second support arm is connected to the free end of the lifting rod, and a second sampling needle is provided at the other end of the second support arm. The axis of the second sampling needle is arranged parallel to the axis of the second lifting rod, wherein the second lifting rod is arranged parallel to the first lifting rod.

2. A dual sample arm sampling mechanism according to claim 1, characterized in that: The first auxiliary support arm is provided with a through first fixing hole, the first cleaning chamber is provided with a first fixing end and a second fixing end, the outer diameter of the first fixing end is smaller than the outer diameter of the second fixing end, the outer diameter of the first fixing end is not larger than the inner diameter of the first fixing hole, the outer diameter of the second fixing end is larger than the inner diameter of the first fixing hole, a first annular groove is provided on the first fixing end, and an adaptable and detachable first elastic fixing block is provided on the first annular groove, when the first elastic fixing block is clamped in the first annular groove, the first elastic fixing block abuts against the first auxiliary support arm, and the second fixed end abuts against the first auxiliary support arm.

3. A dual sample arm sampling mechanism according to claim 2, characterized in that: The first cleaning chamber is provided with a first sealing block, which seals the first cleaning chamber. The first sealing block is provided with a through first supporting hole, the inner diameter of the first supporting hole is adapted to the outer diameter of the first sampling needle, the first supporting hole and the first sampling needle are coaxially arranged, and the first sampling needle is movably inserted into the first supporting hole.

4. A dual sample arm sampling mechanism according to claim 1, characterized in that: It also includes an anti-collision mechanism disposed on the first arm, the anti-collision mechanism including a first base fixedly disposed on the first arm, a first guide column, a first limiting column and a first spring; The first base is provided with a first guide hole adapted to the first guide column, the first guide column is movably inserted into the first guide hole, the first limiting column is arranged on the first base and is arranged parallel to the first guide column, the first spring is sleeved on the first limiting column, a first limiting boss is arranged at one end of the first guide column close to the first base, the first limiting boss is movably inserted into the first limiting column, one end of the first spring abuts against the first limiting boss, and the other end of the first spring abuts against one end of the first limiting column; The first guide column is provided with a first guide channel, the puncture needle tip of the first sampling needle passes through the first guide channel, the first sampling needle is fixedly arranged on the first guide column, and the first guide column and the first sampling needle are arranged coaxially; The anti-collision mechanism also includes a limiting optical coupler and a photosensitive baffle. The limiting optical coupler is provided with a photosensitive groove. The limiting optical coupler is arranged on the first arm. The photosensitive baffle is arranged on the first limiting boss. In the initial position, the photosensitive baffle is located in the photosensitive groove.

5. A dual sample arm sampling mechanism according to claim 1, characterized in that: It also includes a first lifting assembly arranged on the first bracket, the first lifting assembly includes a first driving motor, a first transmission assembly and a first lifting block arranged on the bracket, the first lifting block is connected to the first lifting rod, the moving direction of the first lifting block is consistent with the axial direction of the first lifting rod, and the first lifting block is connected to the first driving motor through the first transmission assembly.

6. A dual sample arm sampling mechanism according to claim 5, characterized in that: The first transmission assembly includes a first driving pulley, a first driven pulley, a first synchronous belt and a first limiting shaft, the first driving pulley is arranged on the output shaft of the first driving motor, the first driven pulley is rotatably arranged on the first bracket, the first synchronous belt is wound around the first driving pulley and the first driven pulley, the first limiting shaft is movably arranged on the first bracket, the axis of the first limiting shaft is consistent with the axis direction of the first lifting rod, the first lifting block is sleeved on the first limiting shaft, and the first limiting block is connected to the first synchronous belt.

7. A dual sample arm sampling mechanism according to claim 6, characterized in that: The first rotating assembly includes a second driving motor, a second driving pulley arranged at the output end of the second driving motor, a second driven pulley, a second synchronous belt wound around the second driving pulley and the second driven pulley, and a second rotating disk, the second driven pulley is fixedly connected to the second rotating disk, and the second rotating disk is rotatably arranged on the first bracket; The second driven pulley and the second rotating disk are both provided with a first channel adapted to the first lifting rod, the first lifting rod is inserted into the first channel, the first lifting rod can move up and down relative to the first channel and rotate synchronously with the second driven pulley; the rotation axis of the second rotating disk coincides with the axis of the first lifting rod; A first rotating disk is provided on the first lifting block, a third rotating disk is provided on the first bracket, one end of the first limiting column passes through the first rotating disk and is connected to the third rotating disk, and the other end of the first limiting column is connected to the second rotating disk, so that the first limiting column can rotate synchronously with the first lifting rod.

8. A dual sample arm sampling mechanism according to claim 7, characterized in that: The first lifting rod is provided with a first limiting boss, and the first channel is provided with a first limiting groove, or the first lifting rod is provided with a first limiting groove, and the first channel is provided with a first limiting boss, the length direction of the first limiting boss is consistent with the axial direction of the first lifting rod, the first limiting groove is adapted to the first limiting boss, the first limiting boss is clamped in the first limiting groove, and the moving distance of the first limiting boss in the first limiting groove is not less than the moving distance of the first sampling needle.

9. A dual sample arm sampling mechanism according to claim 7, characterized in that: It also includes a second lifting assembly and a second rotating assembly, the second lifting assembly is provided with a second lifting block, the second lifting rod is connected to the second lifting block, wherein the second lifting assembly has the same structure as the first lifting assembly, the second rotating assembly has the same structure as the first rotating assembly, and the second arm is bent.

10. A detection instrument, characterized in that: A dual sample arm sampling mechanism comprising any one of claims 1 to 9; a mounting base, wherein the first support and the second support are arranged on the mounting base, wherein a second cleaning chamber is provided on the mounting base, and the rotation radius of the second sampling needle is the same as the distance between the second cleaning chamber and the axis of the second lifting rod.

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