CN113884697A

CN113884697A - Test tube rack limiting assembly, test tube rotating device, sample introduction device and sample analyzer

Info

Publication number: CN113884697A
Application number: CN202010634706.9A
Authority: CN
Inventors: 杨凯; 李鑫; 安二超; 刘洋
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd; Beijing Precil Instrument Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd; Beijing Precil Instrument Co Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2022-01-04

Abstract

The utility model provides a subassembly is right to spacing subassembly, test tube rotary device, sampling device and sample analyzer of test-tube rack, this test tube rotary device include rotating assembly, spacing subassembly of test-tube rack and test tube. At least two of the second drive unit of the rotating assembly, the third drive unit of the test tube rack limiting assembly and the fourth drive unit of the test tube righting assembly are the same drive unit, and the structure can be simplified. Simultaneously, with this rotating assembly, spacing subassembly of test-tube rack and test tube righting subassembly two at least integrations in one set of driving system, can make overall structure compacter to the sample injection device and the complete machine of sample analysis appearance that have adopted this kind of test tube rotating device are littleer.

Description

Test tube rack limiting assembly, test tube rotating device, sample introduction device and sample analyzer

Technical Field

The application relates to the field of medical equipment, in particular to a structure for rotating a test tube.

Background

Sample introduction devices are used in various sample analyzers or other devices to provide for the feeding of samples. During the sampling and detecting process, various related scheduling operations need to be performed on the sample rack and the test tubes (containing samples) thereon. For example, in a fully automated coagulation analyzer, a sample rack is scheduled in a sample processing unit, after loading from a loading area, detection of the presence or absence of a test tube cap, rotational scanning of a test tube barcode, sample aspiration, and the like are respectively completed in a transverse feeding process, and then unloading of the sample rack is completed in an unloading area.

At the in-process of test tube bar code rotation scanning, because test tube rotation scanning device has applyed the effort of certain direction to the test tube, can lead to the sample frame to have rocking and skew of certain degree, this skew is mainly along the ascending removal of test-tube rack direction of transfer to make the skew of the position emergence different degrees of other test tubes on the sample frame. In order to ensure the accuracy of sample bar code scanning and the central position of the test tube to which the sample needle can accurately move in the sample sucking process, the sample rack and the test tube need to be correspondingly fixed, so that the sample rack and the test tube can be accurately positioned, and the deviation of a measuring result is avoided.

Therefore, in addition to the test tube rotating device, a sample holder fixing device and a test tube centering device are additionally provided in the conventional sample introduction device. This sample frame fixing device is used for spacing the test-tube rack, reduces its drunkenness in the direction of transfer. This test tube righting device is used for righting the test tube to guarantee that the test tube is located correct position when scanning sample bar code and drawing a sample.

However, the test tube rotating device, the sample holder fixing device and the test tube centering device are realized by adopting different modules, so that the volume and the cost of the whole device are correspondingly increased, and the miniaturization of the whole size of the medical equipment is not facilitated.

Disclosure of Invention

The application provides a test tube rotary device and adopt this kind of test tube rotary device's sampling device and sample analysis appearance to reduce the complete machine size. The application still provides a spacing subassembly of test-tube rack and adopt test tube rotary device, sampling device and sample analyzer of this kind of spacing subassembly of test-tube rack for carry on spacingly to the test-tube rack, for reduce the rocking of test-tube rack in its direction of transfer when rotatory test tube.

In one embodiment, the present application provides a test tube rotating apparatus for a medical device, including:

the rotating assembly comprises a rotating piece for driving the corresponding test tube to rotate, a first driving unit for driving the rotating piece to rotate and a second driving unit for enabling the rotating piece and the test tube to generate relative motion;

the test tube rack limiting assembly comprises a limiting piece and a third driving unit, wherein the limiting piece can limit the test tube rack to move in the conveying direction when a test tube is rotated, and the third driving unit is used for enabling the limiting piece and the test tube rack to generate relative motion;

and a test tube centering assembly comprising a centering member capable of abutting against the test tube and a fourth drive unit for generating a relative movement between the centering member and the test tube;

at least two of the second driving unit, the third driving unit and the fourth driving unit are the same driving unit.

In one embodiment, the test tube rack further comprises a mounting seat, the rotating assembly further comprises a connecting arm and a pressing part used for pushing the test tube to the rotating part, the pressing part is mounted on the connecting arm, the connecting arm is mounted on the mounting seat, the pressing part and the rotating part are arranged oppositely, a gap used for the test tube rack and the test tube to pass through is reserved between the pressing part and the rotating part, the connecting arm is in transmission connection with a second driving unit, and the second driving unit is used for driving the connecting arm and the pressing part to move towards the rotating part so as to push the test tube to move towards the rotating part.

In one embodiment, the second driving unit and the third driving unit are the same first motor, the first motor is in transmission connection with the connecting arm through a first transmission mechanism, the first motor is in transmission connection with a limiting member, the limiting member and the rotating member are located on the same side, the pressing member is disposed on the opposite side of the limiting member and the rotating member, and the limiting member and the pressing member move in opposite directions under the driving of the first motor.

In one embodiment, the first transmission mechanism is a first synchronous belt mechanism, the first motor is connected with a driving wheel of the first synchronous belt mechanism, and the connecting arm is mounted on a synchronous belt of the first synchronous belt mechanism and reciprocates along with the synchronous belt of the first synchronous belt mechanism.

In one embodiment, the connecting device further comprises a second synchronous belt mechanism, the connecting arm is provided with a first supporting arm, the first supporting arm is connected with a synchronous belt of the second synchronous belt mechanism, the synchronous belt of the second synchronous belt mechanism is followed by the connecting arm to move, the limiting part is installed on the synchronous belt of the second synchronous belt mechanism, and the limiting part and the first supporting arm are respectively connected with two opposite parts on the synchronous belt of the second synchronous belt mechanism, so that the movement of the limiting part is opposite to that of the connecting arm.

In one embodiment, the number of the pressing parts is at least two, the pressing parts are arranged on the connecting arm side by side, and gaps are formed between the adjacent pressing parts.

In one embodiment, the pressing member is a roller, the surface of the roller for contacting the test tube is made of flexible material, and the roller is rotatably mounted on the connecting arm.

In one embodiment, the first driving unit is a second motor, and the second motor is mounted on the mounting base and connected with the rotating member through a gear transmission set.

In one embodiment, the limiting part is movably disposed on the mounting base, one end of the limiting part is a limiting portion, the limiting part is in transmission connection with a third driving unit, the third driving unit drives the limiting part to move relative to the test tube rack, so that the limiting portion is inserted into or abutted against the test tube rack to limit the test tube rack to move in the conveying direction of the test tube rack.

In one embodiment, the movement direction of the limiting part and the transmission direction of the test tube rack form an included angle, and the value a of the included angle is as follows: a is more than or equal to 45 degrees and less than or equal to 135 degrees.

In one embodiment, the limiting portion is arranged corresponding to a side wall of the test tube rack.

In one embodiment, the test tube rack limiting assembly is provided with a first reset elastic member, and the first reset elastic member is used for driving the limiting member to reset towards a direction away from the test tube rack.

In one embodiment, the limiting member is slidably disposed on the mounting base, and the first elastic restoring member is sleeved on the limiting member.

In one embodiment, the test tube centering assembly comprises a base on which the centering member is movably mounted, the fourth drive unit driving the centering member to move towards the test tube.

In one embodiment, the fourth driving unit and the second driving unit use the same first motor, the centering member and the pressing member are located on the same side, the rotating member is disposed on the opposite side of the centering member and the pressing member, the connecting arm is movably connected to the centering member, and when the connecting arm moves to one side of the rotating member, the centering member is driven to move to one side of the rotating member together, so that the centering member can abut against the corresponding test tube.

In one embodiment, the centering member is rotatably mounted on the base, and the rotation axis of the centering member relative to the base is in accordance with the conveying direction of the test tube rack.

In one embodiment, the centering member has a shift lever, the connecting arm has a second support arm, the second support arm is located at one end of the connecting arm connected with the pressing member, the second support arm has a connection port, and the shift lever extends into the connection port, so that the connecting arm can drive the centering member to move together to one side of the rotating member.

In one embodiment, the centering member comprises a connecting block, a second elastic resetting member and a pressing block, the connecting block is rotatably mounted on the base, the second elastic resetting member is mounted on the connecting block, and the pressing block is mounted on the second elastic resetting member; the one side of holding block towards the test tube has the depressed part for the outer wall of laminating test tube.

An embodiment of the application provides a sampling device of medical equipment, including advance kind passageway and as above any one the test tube rotary device, test tube rotary device's rotating member, locating part and righting piece orientation advance kind passageway setting, be used for right test tube in the advance kind passageway rotates.

An embodiment of the application provides a sample analyzer, including sampling channel and as above-mentioned any test tube rotary device, test tube rotary device's rotating member, locating part and righting orientation sampling channel sets up, and is used for right test tube in the sampling channel rotates.

In one embodiment, the sample detection device further comprises a loading area for placing a sample to be detected and an unloading area for unloading the detected sample, the sample feeding channel is positioned between the loading area and the unloading area, the sample to be detected is conveyed from the loading area to the sample feeding channel, and the detected sample is conveyed from the sample feeding channel to the unloading area.

An embodiment of the application provides a spacing subassembly of sampling device's test-tube rack, includes:

a limiter mount for providing support;

the limiting piece is movably mounted on the limiting piece mounting base, one end of the limiting piece is a limiting part, and the limiting part is arranged corresponding to the side wall of the test tube rack;

and the driving unit drives the limiting part to move relative to the test tube rack so that the limiting part is inserted into or tightly propped against the test tube rack.

In one embodiment, the limiting member is slidably disposed on the limiting member mounting base, and the first elastic restoring member is sleeved on the limiting member.

In one embodiment, one end of the limiting part is a front end of the limiting part, an end opposite to the front end is a rear end, the front end of the limiting part passes through the limiting part mounting seat and extends out of the limiting part mounting seat, the rear end of the limiting part is located on the other side of the limiting part mounting seat, and the first elastic resetting member is installed between the rear end of the limiting part and the limiting part mounting seat.

In one embodiment, the driving unit is a first motor, and the first motor is in transmission connection with the limiting member.

An embodiment of the present application provides a sample feeding device's test tube rotary device, includes:

a rotation assembly for rotating the test tube;

and a test tube rack limiting assembly as described in any one of the above.

In one embodiment, the rotating assembly comprises a rotating member, a connecting arm and a pressing member for pushing the test tube to the rotating member, the pressing member is mounted on the connecting arm, the connecting arm is mounted on the limiting member mounting seat, the pressing member is arranged opposite to the rotating member, and a gap for the test tube rack and the test tube to pass through is reserved between the pressing member and the rotating member; the driving unit is a first motor, the first motor is in transmission connection with the connecting arm through a first transmission mechanism, and the first motor drives the connecting arm and the pressing piece to move towards the rotating piece so as to push the test tube to move towards the rotating piece; the first motor is in transmission connection with the limiting piece, the limiting piece and the rotating piece are located on the same side, the abutting piece is arranged on the opposite side of the limiting piece and the rotating piece, and the limiting piece and the abutting piece move in opposite directions under the driving of the first motor.

In one embodiment, the first transmission mechanism is a first synchronous belt mechanism, the first motor is connected with a driving wheel of the first synchronous belt mechanism, and the connecting arm is mounted on a synchronous belt of the first synchronous belt mechanism and reciprocates along with the synchronous belt of the first synchronous belt mechanism; still include second hold-in range mechanism, the linking arm has first support arm, first support arm with second hold-in range mechanism's hold-in range is connected, second hold-in range mechanism's hold-in range is followed the linking arm motion, the locating part is installed on second hold-in range mechanism's the hold-in range, just locating part and first support arm connect respectively in two relative parts on second hold-in range mechanism's the hold-in range make the motion of locating part with the motion of linking arm is opposite.

An embodiment of the application provides a sampling device of medical equipment, including advance kind passageway and as above arbitrary the spacing subassembly of test-tube rack, the locating part orientation of the spacing subassembly of test-tube rack advance kind passageway setting, it is right to carry on spacingly to advance the test tube in the kind passageway.

An embodiment of the application provides a sample analyzer, including introduction channel and as above-mentioned arbitrary spacing subassembly of test-tube rack, the locating part orientation of the spacing subassembly of test-tube rack introduction channel sets up, and is used for right test tube in the introduction channel carries on spacingly.

According to the test tube rotary device of above-mentioned embodiment, it includes rotating assembly, spacing subassembly of test-tube rack and test tube subassembly of righting. The rotating assembly is used for rotating the test tube and comprises a second driving unit for generating relative movement between the rotating member and the test tube. This spacing subassembly of test-tube rack is used for restricting the test-tube rack drunkenness in its conveying direction when rotatory test tube, and it includes the third drive unit that is used for making to produce relative motion between locating part and the test-tube rack. The tube straightening assembly is used for straightening a tube and comprises a fourth drive unit for generating relative motion between the straightening member and the tube. At least two of the second driving unit, the third driving unit and the fourth driving unit are the same driving unit, even one driving unit is adopted for driving, and the structure can be simplified. Simultaneously, with this rotating assembly, spacing subassembly of test-tube rack and test tube righting subassembly two at least integrations in one set of driving system, can make overall structure compacter to the sample injection device and the complete machine of sample analysis appearance that have adopted this kind of test tube rotating device are littleer.

According to the test tube rack limiting assembly of the embodiment, the test tube rack limiting assembly comprises a limiting piece mounting base, a limiting piece and a driving unit. The limiting part is movably mounted on the limiting part mounting base, one end of the limiting part is a limiting part, and the limiting part corresponds to the side wall of the test tube rack. The locating part is connected with the drive unit transmission, and drive unit drive locating part removes relative test-tube rack, makes spacing portion insert or support tight test-tube rack to it is spacing on its direction of transfer to the test-tube rack, makes the restriction test-tube rack play on its direction of transfer when rotatory test tube.

Drawings

FIG. 1 is a schematic structural diagram of a test tube rotating apparatus according to an embodiment of the present disclosure;

FIG. 2 is a side view of a cuvette rotating apparatus according to an embodiment of the present application;

FIGS. 3 and 4 are schematic structural views of the test tube rotating apparatus according to an embodiment of the present application from different viewing angles after omitting the test tube centering assembly;

FIG. 5 is a schematic structural diagram of the test tube rotating device and the test tube rack when the test tube rotating device is installed in the sample introduction device or the sample analyzer according to an embodiment of the present application, wherein the test tube rotating device is cut along a vertical plane at the position of the limiting member;

FIG. 6 is a schematic view of a rotary member driving structure according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a tube centralizer assembly according to an embodiment of the present application;

FIG. 8 is a side view of a tube straightening assembly according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a tube centering assembly according to an embodiment of the present disclosure;

FIG. 10 is a schematic view of the layout of the various zones of a sample analyzer in one embodiment of the present application;

FIG. 11 is a schematic diagram of a sample analyzer according to an embodiment of the present application, in which the tube rotator is cut along a vertical plane at the position of the stopper;

fig. 12 is a schematic view of another perspective of a sample analyzer according to an embodiment of the present disclosure.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The embodiment provides a test tube rotating device of medical equipment, which includes but is not limited to a sample feeding device for sample feeding, various sample analyzers and the like. The test tube rotating device is used for rotating the test tube under certain requirements, such as rotating the test tube during the test tube bar code rotary scanning and the like. This test tube rotary device except satisfying rotatory test tube function, can also spacing on its direction of delivery to the test-tube rack, especially spacing to the test-tube rack when rotatory test tube, avoids causing other test tube positions to change because of the skew of test-tube rack and shake. Simultaneously, this test tube rotary device can also right the test tube that has the demand of rightting, for example right the test tube when sample bar code scans and inhale the appearance to make the test tube can pinpoint, avoid measuring result to appear the deviation.

Specifically, referring to fig. 1 to 5, in one embodiment, the test tube rotating apparatus includes a rotating assembly 100, a test tube rack limiting assembly 200, and a test tube centering assembly 300.

The rotating assembly 100 includes a rotating member 110 for rotating the corresponding test tube 510, a first driving unit 120 for driving the rotating member 110 to rotate, and a second driving unit 130 for generating a relative motion between the rotating member 110 and the test tube 510. The rotating assembly 100 drives the test tube 510 to rotate by pressing the rotating member 110 against the test tube 510. The first driving unit 120 drives the rotating member 110 to rotate, and the first driving unit 120 may commonly use a rotating motor as a power source, but in other embodiments, other structures capable of outputting rotational motion may also be used, for example, a linear motion power source such as an air cylinder, an oil cylinder, a linear motor, etc. is used in combination with a transmission mechanism, and the transmission mechanism can convert linear motion into rotational motion, such as a slider-crank mechanism, a lead screw-nut mechanism, etc.

The rotation member 110 and the test tube 510 generate relative movement, when the two are close to each other and contact, the rotation member 110 rotates the test tube 510, and when the two are far away, the test tube 510 is not affected by the rotation member 110. The relative movement between the rotating member 110 and the cuvette 510 may be generated by the second driving unit 130 driving the rotating member 110 to move relative to the cuvette 510 or by the second driving unit 130 driving the cuvette 510 to move relative to the rotating member 110. For example, in one embodiment, the second driving unit 130 directly drives the rotating member 110 or the rotating member 110 and the first driving unit 120 are integrally moved toward and away from the test tube 510. In another embodiment, the second driving unit 130 drives the test tube 510 to move toward the rotary member 110 by controlling the movement of the output member (e.g., the pressing member 150, hereinafter), so as to move the test tube 510 to and from the rotary member 110.

The rack stopper assembly 200 includes a stopper 210 capable of restricting movement of the test tube rack 500 in a conveying direction thereof when rotating the test tubes 510, and a third driving unit 220 for generating a relative motion between the stopper 210 and the test tube rack 500. When the limiting member 210 and the test tube rack 500 approach each other to a certain extent, if the limiting member 210 compresses the test tube rack 500, the limiting member 210 is inserted into the test tube rack 500 or under other conditions, the limiting member 210 limits the test tube rack 500, and when the limiting member 210 and the test tube rack 500 are far away from each other, the test tube rack 500 is released. The stoppers 210 may prevent the movement of the test tube rack 500 in the conveying direction by compressing, attracting (e.g., magnetically attracting), and forming an obstacle in the conveying direction of the test tube rack 500 (e.g., inserting the test tube rack 500). Of course, this spacing subassembly 200 of test-tube rack can be according to actual demand and form spacingly to test-tube rack 500 under the opportunity of setting for, for example, it is spacing to form to test-tube rack 500 when carrying out operations such as the cap has or not detected, test tube rotation, bar code scanning, sample suction, especially spacing to test-tube rack 500 when rotatory test tube 510, avoid causing other test tube positions to change because of skew and the shake of test-tube rack 500. When the test tube rack 500 does not have the limiting requirement, the limiting member 210 can release the test tube rack 500 without affecting the movement of the test tube rack 500.

The relative motion between the limiting member 210 and the test tube rack 500 may be generated by the third driving unit 220 driving the limiting member 210 to move relative to the test tube rack 500 or by the third driving unit 220 driving the test tube rack 500 to move relative to the limiting member 210. For example, in one embodiment, the third driving unit 220 drives the limiting member 210 to move toward and away from the test tube rack 500. In another embodiment, the third driving unit 220 controls the movement of the output member, so that the output member drives the test tube rack 500 to move towards the limiting member 210, thereby achieving the approaching and separating of the limiting member 210 and the test tube rack 500. In some embodiments, the movement of the test tube rack 500 may be synchronized with the movement of the test tubes 510 in the rotating assembly 100, for example, when the test tube rack 500 moves towards the stopper 210, the test tubes 510 on the test tube rack 500 also move towards the corresponding rotating member 110.

The cuvette centering assembly 300 includes a centering member 310 capable of abutting against the cuvette 510 and a fourth driving unit 320 for generating a relative movement between the centering member 310 and the cuvette 510. The centering member 310 is held at a predetermined position on the tube rack 500 by abutting against the test tube 510, so as to ensure that the position of the test tube 510 satisfies a desired condition when performing a relevant operation on the test tube 510, for example, when scanning, a barcode of the test tube 510 is located in an area that can be scanned by a scanning device, or when aspirating a sample, the middle part of the test tube 510 can be aligned with a sample aspirating needle, thereby avoiding an offset.

The relative motion between the centralizer 310 and the cuvette 510 may be such that the fourth drive unit 320 drives the centralizer 310 relative to the cuvette 510 or the fourth drive unit 320 drives the cuvette 510 relative to the centralizer 310. For example, in one embodiment, the centering members 310 are driven by the fourth driving unit 320 to move toward and away from the test tube 510. In another embodiment, the fourth driving unit 320 controls the motion of the output member, so that the output member drives the test tube 510 or the entire test tube rack 500 to move toward the centering member 310, thereby moving the centering member 310 and the test tube 510 closer to and away from each other.

In this embodiment, at least two of the second driving unit 130, the third driving unit 220 and the fourth driving unit 320 are the same driving unit, so that the number of driving units can be reduced, thereby simplifying the structure of the whole device. Taking a motor as an example, if at least two of the second driving unit 130, the third driving unit 220, and the fourth driving unit 320 are controlled by the same motor, at least one motor can be omitted, so as to release more space to accommodate other structures, and make the whole device more compact. Moreover, the cost can be further reduced by omitting the driving unit. Meanwhile, at least two of the rotating assembly 100, the test tube rack limiting assembly 200 and the test tube centering assembly 300 are integrated in one set of power system, so that the whole structure is more compact, and the sample introduction device adopting the test tube rotating device and the whole volume of the sample analyzer are smaller.

Preferably, in one embodiment, the second drive unit 130, the third drive unit 220 and the fourth drive unit 320 are the same drive unit, so that the rotation, the limiting and the centering operations can be controlled by one drive unit at the same time. The whole device can release larger space to accommodate other structures, and is smaller in size and lower in cost.

The second, third and fourth driving units 130, 220 and 320 may use, but are not limited to, a rotary motor, a linear motor, a cylinder, etc. as a power source. Wherein, these drive units can realize controlling to rotating assembly 100, spacing subassembly 200 of test-tube rack and test tube centering subassembly 300 through all kinds of drive mechanism and the combination of these drive mechanism. The transmission mechanism includes, but is not limited to, a gear transmission mechanism, a synchronous belt transmission mechanism, a synchronous chain transmission mechanism, a crank-slider mechanism, a lead screw-nut mechanism, etc.

Further, referring to fig. 1 to 5, in one embodiment, the test tube rotating apparatus includes a mounting seat 400, and the rotating assembly 100 further includes a connecting arm 140 and a pressing member 150 for pushing the test tube 510 toward the rotating member 110. The press 150 is mounted on the connecting arm 140, and the connecting arm 140 is movably mounted on the mounting base 400, for example, by a sliding connection. The pressing member 150 is disposed opposite to the rotating member 110, and a gap is left between the pressing member and the rotating member for passing the test tube rack 500 and the test tubes 510, as shown in fig. 5, the conveying passage of the test tube rack 500 is located below the gap, and the test tube rack 500 passes through the gap. The connecting arm 140 is drivingly connected to the second driving unit 130, and the second driving unit 130 is used for driving the connecting arm 140 and the pressing member 150 to move towards the rotating member 110, so as to push the test tube 510 to move towards the rotating member 110.

In this embodiment, the pressing member 150 is used to drive the cuvette 510 to press against the rotary member 110. Hereinafter, for convenience of description, a side of the tube rack 500 where the pressing member 150 is located is defined as a front side, and a side of the rotating member 110 is defined as a rear side. The second driving unit 130 drives the connecting arm 140 to move from the front side to the rear side, and the connecting arm 140 further drives the pressing member 150 to move to the rear side together. When the test tube 510 is released, the connecting arm 140 and the pressing member 150 move in opposite directions.

Referring to fig. 1-5, in an embodiment, the second driving unit 130 and the third driving unit 220 are the same first motor (in this embodiment, the first motor is a rotating motor). The first motor is connected to the connecting arm 140 through a first transmission mechanism, and is connected to the position-limiting member 210. The limiting member 210 and the rotating member 110 are located on the same side, that is, both are located on the rear side of the test tube rack 500, and the pressing member 150 is disposed on the opposite side of the limiting member 210 and the rotating member 110. Under the driving of the first motor, the limiting member 210 and the pressing member 150 move in opposite directions. That is, when the first motor drives the pressing member 150 to move from the front side to the rear side of the test tube rack 500, the limiting member 210 is driven to move from the rear side to the front side of the test tube rack 500, so as to form a relative movement with the test tube rack 500. When the test tube rack 500 is released, the stopper 210 moves in the reverse direction.

Of course, in other embodiments, the limiting member 210 and the pressing member 150 may be disposed on the same side, for example, both disposed on the front side of the test tube rack 500, and at this time, the first motor drives the limiting member 210 and the pressing member 150 to move in the same direction. In this embodiment, the first motor may be disposed at the front side of the test tube rack 500, i.e. at the same side as the limiting member 210 and the pressing member 150, so as to drive the limiting member 210 and the pressing member 150 to move from the front side to the rear side simultaneously; alternatively, the limiting member 210 and the first motor may also be connected through the connecting arm 140, similar to the connection manner of the pressing member 150, so that the first motor drives the limiting member 210 and the pressing member 150 to move from the front side to the rear side simultaneously.

In the above embodiment, the first motor drives the limiting member 210 and the pressing member 150 to move simultaneously, and through the design of the stroke, when the pressing member 150 pushes the test tube 510 to the position pressing the rotating member 110, the limiting member 210 just limits the test tube rack 500, thereby ensuring that the test tube rack 500 can deviate in the conveying direction as little as possible during the process of rotating the test tube 510.

Further, with continued reference to fig. 1-5, in one embodiment, the first transmission mechanism is disposed on the mounting base 400. The first transmission mechanism is a first synchronous belt mechanism 160, the first motor is connected with a driving wheel of the first synchronous belt mechanism 160, and the connecting arm 140 is mounted on a synchronous belt 161 of the first synchronous belt mechanism 160 and reciprocates along with the synchronous belt 161 of the first synchronous belt mechanism 160. Of course, in other embodiments, the first transmission mechanism may take other configurations, including but not limited to, a gear transmission mechanism, a synchronous belt transmission mechanism, a synchronous chain transmission mechanism, a crank block mechanism, a lead screw and nut mechanism, and the like. As for the connection between the first motor and the limiting member 210, it can also be realized by various transmission mechanisms, including but not limited to a gear transmission mechanism, a synchronous belt transmission mechanism, a synchronous chain transmission mechanism, a crank block mechanism, a lead screw nut mechanism, and the like.

Specifically, referring to fig. 3, in one embodiment, the rotation axes of the driving wheel and the driven wheel of the first synchronous belt mechanism 160 are arranged along a vertical direction. The first motor is in transmission connection with a driving wheel of the first synchronous belt mechanism 160, and the driving wheel further drives the synchronous belt 161 to move when rotating. The connecting arm 140 is fixedly installed on the timing belt 161, and when one side of the timing belt 161 moves horizontally, the connecting arm 140 is driven to move horizontally. The first motor is a counter-rotating motor, and the rotation of the first motor in different directions will drive the synchronous belt 161 and the connecting arm 140 thereon to reciprocate in the horizontal direction.

Referring to fig. 1 to 5, in order to realize the movement of the position-limiting member 210 and the pressing member 150 in opposite directions, in one embodiment, a second timing belt mechanism 230 is further included, and the connecting arm 140 has a first arm 141, and the first arm 141 is connected to the timing belt 231 of the second timing belt mechanism 230. The timing belt 231 of the second timing belt mechanism 230 moves along with the connecting arm 140, and the position limiter 210 is installed on the timing belt 231 of the second timing belt mechanism 230. As shown in fig. 2, the stopper 210 and the first arm 141 are respectively connected to two opposite portions of a timing belt 231 of the second timing belt mechanism 230, and when the timing belt 231 moves, the movement of the stopper 210 is opposite to the movement of the connecting arm 140.

The second timing belt mechanism 230 is also provided on the mount 400. Specifically, referring to fig. 4 and 5, in one embodiment, the driving pulley and the driven pulley of the second timing belt mechanism 230 are rotatably mounted on the mounting base 400, an upper portion or a lower portion of the timing belt 231 of the second timing belt mechanism 230 is connected to the first arm 141 of the connecting arm 140, and the limiting member 210 is connected to a lower portion or an upper portion of the timing belt 231 opposite to the first arm 141, so that when the first arm 141 drives the timing belt 231 to move, the movement of the limiting member 210 is opposite to that of the first arm 141.

In this embodiment, the rotational axes of the driving pulley and the driven pulley of the second timing belt mechanism 230 are arranged in the horizontal direction. The stop 210 may be secured to the timing belt 231 by one or more transfer blocks 250.

Further, referring to fig. 2 to 5, in an embodiment, the limiting member 210 is movably disposed on the mounting base 400, one end of the limiting member 210 is a limiting portion 211, the limiting member 210 is in transmission connection with a third driving unit 220 (for example, a first motor or other independent driving unit), and the third driving unit 220 drives the limiting member 210 to move relative to the test tube rack 500, so that the limiting portion 211 is inserted into or abutted against the test tube rack 500 (in the figure, the limiting portion 211 is inserted into a hole of the test tube rack 500), and the test tube rack 500 is limited to move in the conveying direction thereof.

In one embodiment, the movement direction of the limiting portion 211 forms an included angle with the transmission direction of the test tube rack 500, and the value a of the included angle is: a is more than or equal to 45 degrees and less than or equal to 135 degrees. For example, as shown in fig. 5, the movement direction of the stopper 210 is 90 ° to the conveying direction of the test tube rack 500. The limiting part 211 is pressed or inserted into the test tube rack 500 at the angle, so that the test tube rack 500 can be better prevented from moving in the conveying direction.

Preferably, in an embodiment, referring to fig. 5, the limiting portion 211 is disposed corresponding to a sidewall of the test tube rack 500. Spacing is carried out from the lateral wall of test-tube rack 500, be more convenient for with the spacing subassembly 200 of rotating assembly 100 and test-tube rack integration on a mount pad 400, also can not occupy the space of other positions, avoid causing the influence to other parts.

Further, in order to facilitate the position-limiting member 210 to be reset more easily, referring to fig. 2 and 5, in an embodiment, the test tube rack position-limiting assembly 200 has a first elastic reset member 240, and the first elastic reset member 240 is used for driving the position-limiting member 210 to reset in a direction away from the test tube rack 500. The first elastic restoring member 240 may be a spring, a leaf spring, or other elastic members. The number of the first return elastic members 240 may be at least one. When the limiting member 210 moves toward the test tube rack 500, the first elastic return member 240 is compressed or stretched, so that the first elastic return member 240 is deformed. When the limiting member 210 moves away from the test tube rack 500, the elastic restoring force of the first restoring elastic member 240 will promote the restoration of the limiting member 210.

Further, referring to fig. 5, in fig. 5, a vertical plane passing through a center line of the limiting member 210 is taken as a cutting plane, and the mounting base 400 and the limiting member 210 and other related components are cut, so as to show the structures of the limiting member 210 and the mounting base 400. The limiting member 210 is slidably disposed on the mounting base 400, and the first elastic restoring member 240 is disposed on the limiting member 210. In addition, in other embodiments, the first elastic restoring element 240 may be connected with the limiting element 210 in parallel or in other matching manners.

For example, as shown in fig. 5, one end of the limiting portion 211 is a front end of the limiting member 210, an end opposite to the front end is a rear end, the front end of the limiting member 210 passes through the mounting base 400 and extends out of the mounting base 400, the rear end of the limiting member 210 is located at the other side of the mounting base 400, and the first elastic restoring member 240 is installed between the rear end of the limiting member 210 and the mounting base 400. The rear end of the position-limiting member 210 can be disposed with the connecting seat 212, and the first elastic return member 240 is installed between the connecting seat 212 and the mounting seat 400. The connecting base 212 may be fixedly connected to the adapter block 250 or may be an integral structure.

Further, referring to fig. 2 and 5, in an embodiment, the limiting member 210 is a rod, wherein the limiting portion 211 is a convex disk, and the disk structure facilitates the insertion of the limiting portion 211 into the aperture of the test tube rack 500.

Further, referring to fig. 5, in an embodiment, the limiting member 210 may be located right below the rotating member 110, and when the rotating member 110 presses the test tube 510, the limiting member 210 may press or be inserted into the test tube rack 500 to limit the test tube.

Further, the mounting 400 is a support structure that may be a unitary component, such as a unitary bracket. It can also be formed by fixedly connecting a plurality of brackets. For example, in the configuration shown in fig. 1-5, the mount 400 includes a plurality of separately manufactured sheet metal brackets that are fixedly coupled together to form the overall mount 400. The mount 400 may be used to support only the rotation assembly 100, or may be used to support both the tube rack retention assembly 200 and/or the tube straightening assembly 300. The first motor, the first transmission mechanism, the second synchronous belt mechanism 230, the connecting arm 140 and the limiting member 210 are all mounted on the mounting base 400. The mounting seat 400 is used for mounting in other medical equipment such as a sample introduction device and a sample analyzer.

In one embodiment, at least two of the rotation assembly 100, the tube rack limiting assembly 200 and the tube straightening assembly 300 are integrated on the same mounting seat 400, so that the tube rotation device is more compact. As the rotating assembly 100 and the test tube rack limiting assembly 200 are integrated on the same mounting seat 400 according to the above embodiment, the space can be saved, and the structure is more compact.

Of course, in other embodiments, separate mounting seats may be provided for each component, for example, the rotation component 100, the rack limiting component 200, and the tube straightening component 300 are provided on three separate mounting seats.

Further, the mounting seat 400 is located at the rear side of the test tube rack 500, and the connecting arm 140 may be a plate-shaped or other shaped structure that is suspended from the mounting seat 400 to the front side of the test tube rack 500. The pressing member 150 is provided at a portion of the connecting arm 140 located at the rear end of the test tube rack 500. The pressing member 150 may be flush with the rotating member 110 or have a height difference.

Further, referring to fig. 3 and 6, in an embodiment, the first driving unit 120 is a second motor, and the second motor is mounted on the mounting base 400 and connected to the rotating member 110 through the gear transmission set 121. Preferably, a second motor is installed near the middle of the mounting base 400, the rotating member 110 may be a rotating wheel, and the second motor is a rotating motor and drives the gear transmission set 121 to rotate. One gear of the gear transmission set 121 is coaxially fixed with the rotating member 110, so as to drive the rotating member 110 to rotate. The outer wall of the rotary member 110 slightly protrudes from the mounting seat 400 so that the mounting seat 400 does not obstruct the outer wall of the rotary member 110 from contacting the test tube 510.

Further, referring to fig. 4 and 9, in an embodiment, the number of the pressing elements 150 is at least two, the pressing elements 150 are arranged side by side on the connecting arm 140, and a gap is formed between adjacent pressing elements 150. When pressing member 150 pushes cuvette 510 to move, the gap may form a limit on a portion of the outer wall of cuvette 510, so that cuvette 510 may be prevented from sliding out of both sides of pressing member 150 when pushing cuvette 510 to move.

In order to make the pushing of the test tube 510 by the pressing member 150 smoother, referring to fig. 4 and 5, in one embodiment, the pressing member 150 is a roller, and the roller is rotatably mounted on the connecting arm 140. The roller can rotate according to the force to adjust when pushing the test tube 510. The surface of the roller for contacting the test tube 510 is made of flexible material to avoid damaging the test tube 510 by striking the test tube 510. While the axis of rotation of the roller shown in fig. 4 and 5 is vertically disposed, in other embodiments, the axis of rotation of the roller may be angled.

Further, referring to fig. 1, 7 and 9, in one embodiment, the cuvette centralizer assembly 300 includes a base 330, the centralizer 310 is movably mounted on the base 330, and a fourth driving unit 320 (e.g., a first motor or other independent driving unit) drives the centralizer 310 to move towards the cuvette 510. The base 330 may be fixedly connected to the mounting seat 400, or as shown in fig. 1, 7 to 9, the base 330 and the mounting seat 400 may be separately disposed at different places.

In a preferred embodiment, the same first motor is used for the fourth driving unit 320 and the second driving unit 130. Like this rotating assembly 100, spacing subassembly 200 of test-tube rack and test tube righting subassembly 300 all adopt same drive unit to drive, can further save drive unit, make the device volume littleer, more compact.

In other embodiments, the same driving unit may be used for the fourth driving unit 320 and the third driving unit 230, for example, a connecting arm structure may be used to drivingly connect the rack limiting assembly 200 and the test tube straightening assembly 300 to the same first motor, and the rotating assembly 100 may be disposed separately, that is, the rotating assembly 100 is not controlled by the first motor.

Referring to fig. 1, 7 to 9, in an embodiment, the centering member 310 and the pressing member 150 are located on the same side, and the rotating member 110 is disposed on the opposite side of the centering member 310 and the pressing member 150. The connecting arm 140 is movably connected to the centering member 310, and when the connecting arm 140 moves towards the rotating member 110, the connecting arm drives the centering member 310 to move towards the rotating member 110, so that the centering member 310 can abut against the corresponding test tube 510.

In some embodiments, the first motor may also be located on the same side as the centering member 310, for example, the first motor may also be located on the front side of the tube rack 500, so that the connecting arm 140 may be omitted or the connecting arm 140 need not be located too long to span across the tube rack 500. Further, the stopper 210 may be provided at the front side of the test tube rack 500, and the test tube rack 500 may be stopped from the front side of the test tube rack 500.

Further, referring to fig. 1, 7 to 9, in one embodiment, the centering member 310 is rotatably mounted on the base 330, and the rotation axis of the centering member 310 relative to the base 330 is consistent with the conveying direction of the test tube rack 500. As shown in fig. 1 and 9, when the rotation axis of the centering member 310 coincides with the conveying direction of the test tube rack 500, the centering member 310 can be easily moved to the position of the test tube 510 during the rotation. Of course, the rotation axis of the centering member 310 relative to the base 330 can be set to other directions as long as the centering member 310 can push the test tube 510 to return to the correct position during the movement.

Referring to fig. 1, 3, 7 to 9, in an embodiment, as an example of the movable connection between the connecting arm 140 and the centering member 310, the centering member 310 has a lever 360, and the connecting arm 140 has a second arm 142. The second arm 142 is located at the end of the connecting arm 140 connected to the pressing member 150. The second arm 142 has a connection port 1421, and the lever 360 extends into the connection port 1421, so that the connecting arm 140 can drive the centering member 310 to move together to the side of the rotating member 110. Preferably, the opening directions of the shift lever 360 and the connection port 1421 are both set along the conveying direction of the test tube rack 500, so that the second support arm 142 can easily drive the centering member 310 to rotate. In addition, the connecting arm 140 may be movably connected to the centralizer 310 in other ways, and is not limited to the above-described structure.

Further, in a more specific embodiment, referring to fig. 7 to 9, the righting member 310 includes a connecting block 340, a second elastic restoring member 350 and a pressing block 370. The connecting block 340 is rotatably installed on the base 330, the second elastic reset member 350 is installed on the connecting block 340, and the pressing block 370 is installed on the second elastic reset member 350.

In order to better centralize the cuvette 510, please refer to fig. 9, in one embodiment, a surface of the pressing block 370 facing the cuvette 510 has a concave portion 371 for fitting the outer wall of the cuvette 510 to prevent the cuvette 510 from sliding out of the pressing block 370.

According to the test tube rotating device provided by the embodiment, the structures of the rotating assembly 100, the test tube rack limiting assembly 200 and the test tube centering assembly 300 are linked, and the test tube rack 500 where the test tube A is located is fixed by the test tube rack limiting assembly 200 while the test tube A is rotated by the rotating assembly 100 through one or two sets of driving units, so that shaking is avoided; meanwhile, the test tube centering assembly 300 can tightly center the test tube B for supporting the sample suction for the sample suction. The whole assembly is compact in structure, and one set of driving structure is used for completing three sets of functional actions.

In another aspect, a sample introduction device for medical equipment is provided in one embodiment of the present application. The sample introduction device is used for sample feeding, such as conveying the test tube rack 500 and the test tubes 510. The sample introduction device comprises a sample introduction channel (i.e. a sample rack transport channel) in which the test tube rack 500 is transported, and a test tube rotating device as shown in any of the above embodiments. Wherein, this test tube rotary device's rotating member 110, locating part 210 and righting 310 set up towards the introduction passageway for test tube in the introduction passageway rotates.

In another aspect, an embodiment of the present application provides a sample analyzer, which can detect and analyze a sample. Referring to fig. 10 to 12, in one embodiment, the sample analyzer includes a sample channel 2000 (i.e., a sample rack transfer channel) and a test tube rotating device 1000 as shown in any of the above embodiments, the test tube rack 500 is transferred in the sample channel 2000, and the rotating member 110, the limiting member 210 and the centering member 310 of the test tube rotating device 1000 are disposed toward the sample channel 2000 for rotating the test tube in the sample channel 2000.

Referring to fig. 10 to 12, in one embodiment, the apparatus further includes a loading area 3000 for loading a sample to be tested and an unloading area 4000 for unloading the tested sample, the sample channel 2000 is located between the loading area 3000 and the unloading area 4000, the sample to be tested is transferred from the loading area 3000 to the sample channel 2000, and the tested sample is transferred from the sample channel 2000 to the unloading area 4000.

Referring to FIG. 10, in one embodiment, the sample channel 2000 includes a sample channel inlet port 2100, a measurement port 2200, and a sample channel outlet port 2300. The unload region 4000 has an unload channel entrance position 4100 and an unload channel exit position 4200. The sample-loaded test tube rack 500 enters the loading zone 3000 into the loading channel entrance position 2100, then passes through the measurement position 2200, the loading channel exit position 2300, the unloading channel entrance position 4100, and the unloading channel exit position 4200 in sequence, and then enters the unloading zone 4000 from the unloading channel exit position 4200. A detection position A, a scanning position B and a sample sucking position C can be further arranged in the sample feeding channel 2000 for respectively carrying out detection, scanning and sample sucking.

This application another embodiment provides a spacing subassembly of sampling device's test-tube rack, and it is used for realizing spacing to test-tube rack 500 in direction of transfer, and this spacing subassembly of test-tube rack not only can be used to fixed test-tube rack 500 in the time of rotatory test-tube rack 500, can also be used to carry on spacingly to test-tube rack 500 under other scenes.

The test tube rack limiting assembly 200 includes a limiting member mounting base, a limiting member and a driving unit. The limiting piece mounting base is used for providing support. The limiting part is movably mounted on the limiting part mounting base, one end of the limiting part is a limiting part, and the limiting part is arranged corresponding to the side wall of the test tube rack 500. The limiting member is in transmission connection with the driving unit, and the driving unit drives the limiting member to move relative to the test tube rack, so that the limiting portion is inserted into or tightly pressed against the test tube rack 500.

The mounting base 400 of the above embodiments may be adopted as the mounting base for the limiting element, or an independent mounting base for the limiting element may be additionally designed to support the limiting element 210. The position-limiting element 210 and the driving unit can be, but not limited to, the position-limiting element 210 structure and the driving unit (e.g., the first motor) structure shown in the above embodiments.

In another aspect, an embodiment of the present application provides a test tube rotating apparatus 1000 of a sample injection apparatus, where the test tube rotating apparatus 1000 includes a rotating component and a test tube rack limiting component as shown in the foregoing embodiment. The rotation assembly is used to rotate cuvette 510. The rotating assembly may be, but is not limited to, the rotating assembly 100 shown in the various embodiments described above, and may also be, for example, a test tube rotating structure existing in various medical devices.

In an embodiment of the test tube rotating device, the rotating assembly and the test tube rack limiting assembly can be respectively and independently arranged, and can also be driven by the same driving unit as the embodiment, so that the structure is simplified, and the volume of the test tube rotating device 1000 is smaller and more compact.

On the other hand, an embodiment further provides a sample introduction device of a medical apparatus, which includes a sample introduction channel 2000 and a test tube rack limiting assembly as in any of the above embodiments, wherein a limiting member of the test tube rack limiting assembly is disposed toward the sample introduction channel 2000 and is used for limiting a sample in the sample introduction channel 2000.

On the other hand, an embodiment further provides a sample analyzer, which includes a sample introduction channel 2000 and a test tube rack limiting assembly as shown in any of the above embodiments, wherein a limiting member of the test tube rack limiting assembly is disposed toward the sample introduction channel 2000 to limit a sample in the sample introduction channel 2000.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A test tube rotating apparatus of a medical device, comprising:

2. The test tube rotating apparatus according to claim 1, further comprising a mounting base, wherein the rotating assembly further comprises a connecting arm and a pressing member for pushing the test tube toward the rotating member, the pressing member is mounted on the connecting arm, the connecting arm is mounted on the mounting base, the pressing member is disposed opposite to the rotating member, a gap is left between the connecting arm and the rotating member for the test tube rack and the test tube to pass through, the connecting arm is in transmission connection with a second driving unit, and the second driving unit is used for driving the connecting arm and the pressing member to move toward the rotating member so as to push the test tube to move toward the rotating member.

3. The cuvette rotating apparatus according to claim 2, wherein the second driving unit and the third driving unit are a same first motor, the first motor is drivingly connected to the connecting arm through a first transmission mechanism, the first motor is drivingly connected to a limiting member, the limiting member and the rotating member are located on the same side, the pressing member is disposed on the opposite side of the limiting member and the rotating member, and the limiting member and the pressing member are moved in opposite directions by the first motor.

4. The test tube rotating apparatus according to claim 3, wherein the first transmission mechanism is a first synchronous belt mechanism, the first motor is connected to a driving wheel of the first synchronous belt mechanism, and the connecting arm is mounted on a synchronous belt of the first synchronous belt mechanism and reciprocates along with the synchronous belt of the first synchronous belt mechanism.

5. The test tube rotating device according to claim 4, further comprising a second synchronous belt mechanism, wherein the connecting arm has a first arm, the first arm is connected to the synchronous belt of the second synchronous belt mechanism, the synchronous belt of the second synchronous belt mechanism moves along with the connecting arm, the limiting member is mounted on the synchronous belt of the second synchronous belt mechanism, and the limiting member and the first arm are respectively connected to two opposite portions of the synchronous belt of the second synchronous belt mechanism, so that the movement of the limiting member is opposite to the movement of the connecting arm.

6. The test tube rotating apparatus according to claim 2, wherein the number of the pressing members is at least two, the pressing members are arranged side by side on the connecting arm with a gap between adjacent pressing members.

7. Test tube rotating device according to claim 6, characterized in that the pressing elements are rollers, the surface of which for contact with the test tube is of flexible material, which are rotatably mounted on the connecting arm.

8. The cuvette rotation device according to any one of claims 2 to 7, wherein the first drive unit is a second motor mounted on a mounting seat, which is connected to the rotation member via a gear train.

9. The test tube rotating device according to claim 2, wherein the limiting member is movably disposed on the mounting base, one end of the limiting member is a limiting portion, the limiting member is in transmission connection with a third driving unit, and the third driving unit drives the limiting member to move relative to the test tube rack, so that the limiting portion is inserted into or abuts against the test tube rack to limit the test tube rack from moving in the conveying direction.

10. The test tube rotating device according to claim 9, wherein the movement direction of the limiting portion and the conveying direction of the test tube rack form an included angle, and the value a of the included angle is: a is more than or equal to 45 degrees and less than or equal to 135 degrees.

11. The test tube rotating apparatus according to claim 9, wherein the stopper is provided corresponding to a side wall of the test tube rack.

12. The cuvette rotation device according to claim 9, wherein the rack stopper has a first return elastic member for driving the stopper to return in a direction away from the rack.

13. The cuvette rotating apparatus according to claim 12, wherein the stopper is slidably disposed on the mounting base, and the first restoring elastic member is sleeved on the stopper.

14. Test tube rotating device according to any one of claims 2-13, characterized in that the test tube centering assembly comprises a base on which the centering member is mounted in a movable manner, the fourth drive unit driving the centering member towards the test tube.

15. The test tube rotating apparatus according to claim 14, wherein the fourth driving unit and the second driving unit use the same first motor, the centering member and the pressing member are located on the same side, the rotating member is disposed on the opposite side of the centering member and the pressing member, and the connecting arm is movably connected to the centering member, and when the connecting arm moves to one side of the rotating member, the centering member is driven to move to one side of the rotating member together, so that the centering member can abut against the corresponding test tube.

16. Test tube rotating device according to claim 15, characterized in that the centering members are rotatably mounted on the base, the axis of rotation of the centering members relative to the base coinciding with the direction of transport of the test tube rack.

17. The cuvette rotating apparatus according to claim 15, wherein the centering member has a lever, the connecting arm has a second arm at an end of the connecting arm connected to the pressing member, the second arm has a connection port, and the lever extends into the connection port so that the connecting arm can move the centering member together to a side of the rotating member.

18. The cuvette rotating apparatus according to claim 15, wherein the centering member comprises a connecting block, a second elastic restoring member and a pressing block, the connecting block is rotatably mounted on the base, the second elastic restoring member is mounted on the connecting block, and the pressing block is mounted on the second elastic restoring member; the one side of holding block towards the test tube has the depressed part for the outer wall of laminating test tube.

19. A sample introduction device for a medical apparatus, comprising a sample introduction channel and a test tube rotation device according to any one of claims 1 to 18, wherein the rotation member, the limiting member and the centering member of the test tube rotation device are disposed toward the sample introduction channel to rotate a test tube in the sample introduction channel.

20. Sample analyzer, comprising a sample channel and a cuvette rotation device according to any of claims 1-18, wherein the rotation, stop and centering elements of the cuvette rotation device are arranged towards the sample channel for rotating a cuvette in the sample channel.

21. The sample analyzer of claim 20 further comprising a loading area for loading a sample to be tested and an unloading area for unloading the tested sample, the sample channel being located between the loading area and the unloading area, the sample to be tested being transported from the loading area to the sample channel, and the tested sample being transported from the sample channel to the unloading area.

22. The utility model provides a spacing subassembly of sampling device's test-tube rack which characterized in that includes:

a limiter mount for providing support;

23. The test tube rack limiting assembly according to claim 22, wherein the movement direction of the limiting portion and the conveying direction of the test tube rack form an included angle, and the value a of the included angle is: a is more than or equal to 45 degrees and less than or equal to 135 degrees.

24. The rack limiting assembly according to claim 22, wherein the rack limiting assembly has a first elastic return member, and the first elastic return member is used for driving the limiting member to return in a direction away from the rack.

25. The test tube rack limiting assembly according to claim 24, wherein the limiting member is slidably disposed on the limiting member mounting base, and the first restoring elastic member is sleeved on the limiting member.

26. The tube rack limiting assembly according to claim 24, wherein the limiting portion is located at a front end of the limiting member, an end opposite to the front end is a rear end, the front end of the limiting member passes through the limiting member mounting base and extends out of the limiting member mounting base, the rear end of the limiting member is located at the other side of the limiting member mounting base, and the first elastic resetting member is installed between the rear end of the limiting member and the limiting member mounting base.

27. The test tube rack limiting assembly according to any one of claims 22 to 26, wherein the driving unit is a first motor, and the first motor is in transmission connection with the limiting member.

28. The utility model provides a sample injection unit's test tube rotary device which characterized in that includes:

a rotation assembly for rotating the test tube;

and a test tube rack retention assembly as claimed in any one of claims 22 to 27.

29. The test tube rotating apparatus according to claim 28, wherein the rotating assembly includes a rotating member, a connecting arm, and a pressing member for pushing the test tube toward the rotating member, the pressing member being mounted on the connecting arm, the connecting arm being mounted on the stopper mounting base, the pressing member being disposed opposite to the rotating member with a gap therebetween for the test tube rack and the test tube to pass through; the driving unit is a first motor, the first motor is in transmission connection with the connecting arm through a first transmission mechanism, and the first motor drives the connecting arm and the pressing piece to move towards the rotating piece so as to push the test tube to move towards the rotating piece; the first motor is in transmission connection with the limiting piece, the limiting piece and the rotating piece are located on the same side, the abutting piece is arranged on the opposite side of the limiting piece and the rotating piece, and the limiting piece and the abutting piece move in opposite directions under the driving of the first motor.

30. The test tube rotating apparatus according to claim 29, wherein the first transmission mechanism is a first synchronous belt mechanism, the first motor is connected to a driving wheel of the first synchronous belt mechanism, and the connecting arm is mounted on a synchronous belt of the first synchronous belt mechanism and reciprocates along with the synchronous belt of the first synchronous belt mechanism; still include second hold-in range mechanism, the linking arm has first support arm, first support arm with second hold-in range mechanism's hold-in range is connected, second hold-in range mechanism's hold-in range is followed the linking arm motion, the locating part is installed on second hold-in range mechanism's the hold-in range, just locating part and first support arm connect respectively in two relative parts on second hold-in range mechanism's the hold-in range make the motion of locating part with the motion of linking arm is opposite.

31. A sample introduction device for medical equipment, comprising a sample introduction channel and a test tube rack limiting assembly according to any one of claims 22 to 27, wherein a limiting member of the test tube rack limiting assembly is disposed toward the sample introduction channel to limit a test tube in the sample introduction channel.

32. A sample analyzer comprising a sample channel and a tube rack limiting assembly according to any one of claims 22-27, wherein a limiting member of the tube rack limiting assembly is disposed towards the sample channel for limiting a tube in the sample channel.