CN119224343A

CN119224343A - Sample Analyzer

Info

Publication number: CN119224343A
Application number: CN202310804943.9A
Authority: CN
Inventors: 周照领; 王家驹
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2024-12-31

Abstract

The invention provides a sample analyzer, which comprises a cover opening mechanism and a driving mechanism, wherein the cover opening mechanism comprises a first clamping jaw and a second clamping jaw which are used for clamping a cover together, the first clamping jaw comprises a cover opening hook which is used for being abutted with the bottom surface of the cover, the second clamping jaw is used for being abutted with other outer surfaces except the bottom surface of the cover, when the first clamping jaw and the second clamping jaw clamp the cover together, a part where the cover is abutted by the cover opening hook is spaced from the gravity center of the cover along the horizontal direction, the driving mechanism is used for driving the first clamping jaw and the second clamping jaw to ascend so as to realize cover opening, and after the cover is separated from a container main body, the second clamping jaw is driven to move from a second clamping position to an opening position so as to enable the cover to fall. The sample analyzer provided by the invention can improve the controllability of the falling direction of the cover and reduce the risk of deviation of the falling position of the cover.

Description

Sample analyzer

Technical Field

The invention relates to the technical field of medical equipment, in particular to a sample analyzer.

Background

The operation of the sample analyzer involves both uncapping and uncapping the sample container. The uncapping mechanism in a sample analyzer typically includes a plurality of jaws that, after gripping the cap of a sample container, a drive mechanism in the sample analyzer lifts the jaws to withdraw the cap. When it is desired to throw the cap, the jaws open to release the cap, which falls into the collection container of the sample analyzer for collecting the discarded cap, so as to prevent the discarded cap from contaminating the internal working environment of the sample analyzer and from jamming into certain parts and causing malfunction of the sample analyzer. However, in the prior art, the controllability of the falling direction of the cap after the clamping jaw is opened is poor, the falling position of the cap (referring to the final falling point of the cap) is easy to deviate, and the risk of the cap falling out of the container collecting the cap is high.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a sample analyzer which can improve the controllability of the falling direction of the cover and reduce the risk of deviation of the falling position of the cover.

A sample analyzer according to an embodiment of the present invention includes a fixing mechanism for fixing a container body of a sample container including the container body for containing a sample and a cover for sealing the container body; the container comprises a container body, a reaction cup, a sample dispensing mechanism for sucking a sample in the container body and discharging the sample into the reaction cup, a reagent dispensing mechanism for sucking a reagent and discharging the reagent into the reaction cup, a mixing mechanism for mixing a reaction liquid in the reaction cup, the reaction liquid being formed by mixing at least the sample and the reagent, a reaction mechanism for placing the reaction cup and incubating the reaction liquid in the reaction cup, a detection mechanism for measuring the incubated reaction liquid to obtain a detection result, a cap opening mechanism comprising a first gripping jaw and a second gripping jaw, the first gripping jaw and the second gripping jaw being used for jointly gripping the cap, the first gripping jaw comprising a hook for abutting with the bottom surface of the cap in a first gripping position, the second gripping jaw being used for abutting with other outer surfaces except the bottom surface of the cap in a second gripping position, the cap being jointly gripped with the cap in a second gripping position, the cap being abutted with the hook, the cap being driven by the first gripping jaw and the cap in a horizontal direction, the cap opening mechanism being driven by the cap in a second gripping jaw position, the cap opening mechanism being separated from the container body in a horizontal direction, the cap opening mechanism is driven in a position, the second clamping jaw is spaced from the cover, and a recovery mechanism is used for recovering the cover falling from the cover opening mechanism.

The sample analyzer has the advantages that the first clamping jaw is abutted with the bottom surface of the cover, the second clamping jaw is not abutted with the bottom surface of the cover, the cover can be stopped on the first clamping jaw briefly after the first clamping jaw and the second clamping jaw are opened, and the cover stopped on the first clamping jaw can fall down along the preset direction under the action of self gravity due to the fact that the part of the cover, which is abutted by the cover opening hook, is positioned on one side of the gravity center of the cover in the horizontal direction. The parts of the cover, which are abutted by the cover opening hooks, are sequentially arranged with the gravity centers of the cover according to a preset direction. Therefore, the sample analyzer can improve the controllability of the falling direction of the cover and reduce the risk of deviation of the falling position of the cover.

According to some embodiments of the invention, the first jaw is configured to remain stationary during the driving of the second jaw from the second clamping position to the open position by the driving mechanism.

According to some embodiments of the invention, the second jaw is configured to abut a side of the lid to clamp the lid in cooperation with the first jaw, and the movement of the second jaw from the second clamping position to the open position comprises a component of movement in a horizontal direction.

According to some embodiments of the invention, the second jaw is configured to abut against a top surface of the lid to engage the first jaw to clamp the lid, and the movement of the second jaw from the second clamping position to the open position includes a component of movement in a vertical direction, wherein when the first jaw and the second jaw jointly clamp the lid, a portion of the lid that is abutted by the lid-opening hook is a first portion, a portion of the lid that is abutted by the second jaw is a second portion, the first portion and the second portion are both disposed on the same side of the center of gravity, and the second portion is located on a side of the first portion that is remote from the center of gravity.

According to some embodiments of the invention, when the first clamping jaw and the second clamping jaw jointly clamp the cover, a gap exists between a part, abutted by the cover opening hook, of the cover and the gravity center of the cover along a first horizontal direction, the cover opening mechanism further comprises a first blocking part and a second blocking part which are distributed along a second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, a gap for accommodating the cover is reserved between the first blocking part and the second blocking part, the first blocking part and the second blocking part are used for limiting the cover along the second horizontal direction, the first blocking part and the second blocking part are connected to the first clamping jaw, or the first blocking part and the second blocking part are connected to the second clamping jaw, or one of the first blocking part and the second blocking part is connected to the first clamping jaw, the other blocking part is connected to the second clamping jaw, and the first clamping jaw and the second clamping jaw are respectively arranged.

According to some embodiments of the invention, the first blocking portion and the second blocking portion are both connected to the first clamping jaw, and the distance between the first blocking portion and the second blocking portion in the second direction is gradually increased along the direction from the first clamping jaw to the second clamping jaw, so that the first blocking portion and the second blocking portion abut against the cover along the first direction to clamp the cover with the second clamping jaw, or the first blocking portion and the second blocking portion are both connected to the second clamping jaw, and the distance between the first blocking portion and the second blocking portion in the second direction is gradually increased along the direction from the second clamping jaw to the first clamping jaw, so that the first blocking portion and the second blocking portion abut against the cover along the first direction to clamp the cover with the first clamping jaw.

According to some embodiments of the invention, the cover opening mechanism further comprises a connecting seat, the first clamping jaw and the second clamping jaw are both connected with the connecting seat in a rotating mode, the driving mechanism is connected with the connecting seat, the cover opening hook is configured to be kept at the first clamping position under the gravity action of the first clamping jaw, and the second clamping jaw is kept at the second clamping position under the gravity action of the second clamping jaw.

According to some embodiments of the invention, the cover opening mechanism comprises a connecting seat, wherein the first clamping jaw and the second clamping jaw are both movably connected with the connecting seat, the driving mechanism is connected with the connecting seat, the cover opening mechanism further comprises a first elastic piece, two ends of the first elastic piece are respectively connected with the first clamping jaw and the connecting seat, the elastic force of the first elastic piece is used for driving the first clamping jaw and the second clamping jaw to be close to each other, and/or two ends of the second elastic piece are respectively connected with the second clamping jaw and the connecting seat, the elastic force of the second elastic piece is used for driving the first clamping jaw and the second clamping jaw to be close to each other, and/or two ends of the third elastic piece are respectively connected with the first clamping jaw and the second clamping jaw, and the elastic force of the third elastic piece is used for driving the first clamping jaw and the second clamping jaw to be close to each other.

According to some embodiments of the invention, the cover opening mechanism further comprises a connecting seat and an upper limiting piece, the first clamping jaw and the second clamping jaw are both movably connected with the connecting seat, the driving mechanism is connected with the connecting seat and used for driving the connecting seat to lift, the upper limiting piece is fixedly connected with the connecting seat, the upper limiting piece is arranged between the first clamping jaw and the second clamping jaw, when the connecting seat is driven by the driving mechanism to move downwards to an abutting position, the bottom surface of the upper limiting piece abuts against the top surface of the cover to limit the downward movement of the connecting seat, and the cover opening hook abuts against or is lower than the bottom surface of the cover.

According to some embodiments of the invention, the first clamping jaw further comprises a connecting body, the cover opening hook is connected to the connecting body, the cover opening hook comprises a first abutting surface, the first abutting surface is arranged at the top of the cover opening hook, one end of the first abutting surface away from the connecting body is used for abutting against the bottom surface of the cover, and the height of the first abutting surface gradually increases from one end of the first abutting surface close to the connecting body to one end of the first abutting surface away from the connecting body.

According to some embodiments of the invention, the first clamping jaw further comprises a connecting body, the cover opening hook is connected to the connecting body, one end of the cover opening hook, which is far away from the connecting body, is used for abutting against the bottom surface of the cover, and when the first clamping jaw and the second clamping jaw clamp the cover together, the horizontal distance between the part, which is abutted against by the cover opening hook, of the cover and the connecting body is smaller than the horizontal distance between the gravity center of the cover and the connecting body.

According to some embodiments of the invention, the second jaw comprises a second abutment surface for clamping the lid with the first jaw, the second abutment surface being planar.

According to some embodiments of the present invention, a sample analyzer includes a cover opening mechanism including a first jaw and a second jaw for collectively holding a lid of a sample container, the first jaw including a cover opening hook for abutting a bottom surface of the lid in a first holding position, the second jaw for abutting other outer surfaces than the bottom surface of the lid in a second holding position, a position where the lid is abutted by the cover opening hook when the first jaw and the second jaw collectively hold the lid is spaced apart from a center of gravity of the lid in a horizontal direction, a driving mechanism for driving the first jaw and the second jaw to rise to separate the lid from a container body of the sample container, and driving the second jaw from a second holding position to an open position to drop the lid after the lid is separated from the container body, wherein the second jaw is spaced apart from the lid when the second jaw is in the open position.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a cover opening mechanism and a drive mechanism of a sample analyzer according to an embodiment of the present invention;

FIG. 2 is a schematic view of the door opening mechanism of FIG. 1;

FIG. 3 is a schematic view of the first and second jaws of FIG. 1 gripping a cover;

FIG. 4 is a schematic view of the second jaw of FIG. 3 moved to an open position;

FIG. 5 is a schematic view of an uncapping mechanism for abutting a top surface of a lid with a second jaw in accordance with an embodiment of the present invention;

FIG. 6 is a schematic view of the second jaw of FIG. 5 moved to an open position;

FIG. 7 is a cross-sectional view of the structure of FIG. 3 taken along section A-A;

FIG. 8 is a schematic view of the lid opening mechanism gripping a lid with both the first and second stops connected to the second jaw;

FIG. 9 is a schematic view of the lid opening mechanism gripping a lid without the first and second stops attached to either jaw;

FIG. 10 is a schematic view of the lid opening mechanism gripping a lid with the first and second stops respectively connected to different jaws;

FIG. 11 is a schematic view of the door opening mechanism of FIG. 1 with a second guide surface abutting a cover;

FIG. 12 is a schematic view of the door opening mechanism of FIG. 1 when the upper stop is in abutment with the lid;

fig. 13 is a schematic view of the cover opening mechanism in fig. 1 when the second clamping jaw abuts against the abutting piece.

Reference numerals:

101-uncapping mechanism, 102-driving mechanism, 103-cover receiving hopper, 104-first clamping jaw, 105-second clamping jaw, 106-uncapping hook, 107-first blocking part, 108-connecting seat, 109-upper limiting piece, 110-bracket, 111-first elastic piece, 112-second elastic piece, 113-connecting main body, 114-first abutting surface, 115-first guiding surface, 116-second abutting surface, 117-second guiding surface, 118-second blocking part, 119-abutting piece;

201-sample container, 202-container body, 203-lid, 204-center of gravity, 205-first location, 206-second location.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1, in one embodiment, a sample analyzer includes a cap opening mechanism 101 and a drive mechanism 102, and is capable of cap opening and cap throwing of a sample container 201. Fig. 1 also shows a sample container 201, the sample container 201 comprising a container body 202 for containing a sample and a lid 203 for sealing the container body 202. Specifically, a space capable of accommodating a sample is provided inside the container body 202, an opening for the sample to enter and exit is provided at the top of the container body 202, and a cover 203 is detachably attached to the top of the container body 202 and closes off the opening. The sample container 201 may be a test tube, a bottle, or the like, and in the drawings of the present invention, the sample container 201 is a test tube, and the container body 202 is a tube body of the test tube.

Fig. 2 shows the door opening mechanism 101 in fig. 1, and fig. 3 shows a state in which the door opening mechanism 101 in fig. 2 grips the cover 203. Referring to fig. 2, the lid opening mechanism 101 includes a first jaw 104 and a second jaw 105, the first jaw 104 and the second jaw 105 being for commonly gripping the lid 203. The first jaw 104 comprises an uncapping hook 106, the uncapping hook 106 being in a first gripping position in fig. 3, the uncapping hook 106 being adapted to abut the bottom surface of the lid 203 in the first gripping position. Further, referring to fig. 3, when the first jaw 104 and the second jaw 105 clamp the lid 203 together, a portion of the lid 203 that is abutted by the lid opening hook 106 is disposed at a distance from the center of gravity 204 of the lid 203 in the horizontal direction. In fig. 3, the portion of the lid 203 that is abutted by the lid opening hook 106 is located on the left side of the center of gravity 204 of the lid 203. In the case where the cover 203 is cylindrical, the center of gravity 204 of the cover 203 is located on the center axis of the cover 203. In fig. 3, the second clamping jaw 105 is in the second clamping position, the second clamping jaw 105 is used for abutting against other outer surfaces except the bottom surface of the cover 203, the second clamping jaw 105 abuts against the side surface of the cover 203 (as shown in fig. 3), and in another embodiment, the second clamping jaw 105 may abut against the top surface of the cover 203 (as shown in fig. 5). In the case where the cross-sectional shape of the cover 203 is circular, the side surface of the cover 203 is the outer peripheral surface of the cover 203.

When the lid opening hook 106 is in the first gripping position and the second gripping jaw 105 is in the second gripping position, the first gripping jaw 104 grips the lid 203 with the second gripping jaw 105. After the first and second jaws 104 and 105 grip the lid 203 and the lid opening hook 106 abuts the bottom surface of the lid 203, the driving mechanism 102 drives the first and second jaws 104 and 105 to rise, and the lid 203 rises together with the first and second jaws 104 and 105, and the lid 203 moves upward relative to the container body 202 so as to be separated from the container body 202 (the container body 202 is fixed without rising together with the first and second jaws 104 and 105). In this way, the uncapping of the sample container 201 is achieved.

After the cap 203 is separated from the container body 202, the drive mechanism 102 drives the second jaw 105 from the second gripping position to the open position to drop the cap 203. Specifically, in fig. 4, the second jaw 105 is in an open position, where the second jaw 105 is to abut the cover 203, and the cover 203 is spaced apart. During movement of the second jaw 105 from the second gripping position to the open position. After the second jaw 105 is moved to the open position, the first jaw 104 and the second jaw 105 release the cover 203. As shown in fig. 4, since the first jaw 104 is provided with the lid opening hook 106 for abutting the bottom surface of the lid 203 and the second jaw 105 does not abut the bottom surface of the lid 203, the lid 203 is initially carried by the first jaw 104 during the process of opening the first and second jaws 104, 105 to each other. Subsequently, as shown in fig. 4, with one end of the lid opening hook 106 for abutting against the lid 203 as a fulcrum, the moment generated by the gravity of the lid 203 itself rotates the lid 203 (the top of the lid 203 rotates to the right), thereby causing the lid 203 to fall from the lid opening hook 106. In this way, the cap 203 is thrown.

Since the first clamping jaw 104 is abutted against the bottom surface of the cover 203 and the second clamping jaw 105 is not abutted against the bottom surface of the cover 203, the cover 203 will firstly stay on the first clamping jaw 104 briefly after the first clamping jaw 104 and the second clamping jaw 105 are opened, and since the part of the cover 203, which is abutted by the cover opening hook 106, is positioned on one side of the gravity center 204 of the cover 203 in the horizontal direction, the cover 203 staying on the first clamping jaw 104 will fall down along the preset direction under the action of self gravity. The portion of the lid 203 that is contacted by the lid hook 106 and the center of gravity 204 of the lid 203 are arranged in the predetermined direction (the predetermined direction is the left-to-right direction in fig. 4). Therefore, the sample analyzer of the present invention can improve the controllability of the falling direction of the cover 203, and reduce the risk of deviation of the falling position of the cover 203.

In one embodiment, the sample analyzer may further comprise a fixing mechanism, a sample dispensing mechanism, a reagent dispensing mechanism, a mixing mechanism, a reaction mechanism, a detection mechanism, and a recovery mechanism.

The securing mechanism is used to secure the container body 202. The fixing mechanism may be provided with a plurality of sample sites for placing the container body 202, and the fixing mechanism may clamp the container body 202 to fix the container body 202. After the fixing mechanism fixes the container body 202, the lid opening mechanism 101 may clamp the lid 203 and pull the lid 203 upward, thereby separating the lid 203 from the container body 202.

The sample dispensing mechanism is used to aspirate the sample in the container body 202 and discharge it into the cuvette. For example, the sample dispensing mechanism may comprise a sample needle and a first displacement mechanism for driving the sample needle in motion, which may be provided as a two-dimensional or three-dimensional displacement platform. The sample needle can move to the uncapped sample container 201 under the drive of the first displacement mechanism and suck the sample in the sample container 201, and after the sample is sucked, the sample needle moves to the reaction cup to be sampled under the drive of the first displacement mechanism and then the sample is discharged into the reaction cup.

The reagent dispensing mechanism is used for sucking the actual reagent and discharging the reagent into the reaction cup. For example, the reagent dispensing mechanism may comprise a reagent needle and a second displacement mechanism for driving the movement of the reagent needle, which may be arranged as a two-dimensional or three-dimensional displacement platform. The reagent needle may be moved into the cuvette to be filled with the reagent under the drive of the second displacement mechanism, and then the reagent needle discharges the reagent into the cuvette. Wherein the reagent discharged by the reagent needle may be aspirated from a container of the reagent dispensing mechanism for storing the reagent.

The mixing mechanism is used for uniformly mixing the reaction liquid in the reaction cup so as to fully mix the sample and the reagent. Wherein the reaction solution is formed by mixing at least a sample and a reagent. The mixing mechanism can fix the reaction cup and drive the reaction cup to do periodic motion, thereby realizing the mixing of the reaction liquid.

The reaction mechanism is used for placing the reaction cup and incubating the reaction liquid in the reaction cup. The reaction mechanism is provided with at least one placement position for placing the reaction cup, and after being uniformly mixed, the reaction cup is placed in the reaction mechanism.

The detection mechanism is used for measuring the reaction liquid after incubation, so as to obtain a detection result. For example, the detection means includes an instrument for measuring a certain component, and for example, the detection means includes a photodetection member for detecting the luminescence intensity of the reaction solution so that the detection means calculates the concentration of the component to be measured in the sample.

The recovery mechanism is for recovering the cover 203 dropped from the cover opening mechanism 101. For example, the recycling mechanism includes a recycling container having an opening at the top for collecting the waste cover 203. The recovery mechanism may also include a removable lid receiving hopper 103 (as shown in fig. 1), wherein after the end of the uncapping process, the lid receiving hopper 103 may be moved under the first jaw 104, and the lid 203 may be dropped into the lid receiving hopper 103 after dropping from the first jaw 104, and then the lid 203 may slide down the sloped lid receiving hopper 103 into the recovery container.

Referring to fig. 3, the lid opening hook 106 includes a first abutment surface 114, and the first abutment surface 114 is tilted upward. More specifically, the first holding jaw 104 further includes a connecting body 113, the lid opening hook 106 is connected to a bottom end of the connecting body 113, an end of the first abutment surface 114 remote from the connecting body 113 is for abutment with a bottom surface of the lid 203, and a height of the first abutment surface 114 gradually increases from an end (left end) of the first abutment surface 114 near the connecting body 113 to an end (right end) of the first abutment surface 114 remote from the connecting body 113. The advantage of this arrangement is that the lid opening hook 106 can more easily catch the edge of the bottom surface of the lid 203, with a lower risk of dropping the lid 203 when the first and second jaws 104, 105 grip the lid 203.

Referring to fig. 3, in an embodiment, when the first jaw 104 and the second jaw 105 clamp the cover 203 together, a horizontal distance between a portion of the cover 203 abutted by the cover opening hook 106 and the connecting body 113 is smaller than a horizontal distance between a center of gravity 204 of the cover 203 and the connecting body 113. That is, the portion of the cover 203 that is abutted by the lid opening hook 106 is closer to the connecting body 113 than the center of gravity of the cover 203. Taking fig. 3 as an example, a portion of the lid 203 that is abutted by the lid opening hook 106 is provided on the left side of the center of gravity of the lid 203. This arrangement is advantageous in shortening the horizontal length of the lid opening hook 106 and reducing the complexity of the shape of the lid opening hook 106, and in addition, this arrangement is advantageous in rotating the lid 203 in a direction away from the connecting body 113 of the first jaw 104 to drop, reducing the risk that the connecting body 113 obstructs the lid 203 from dropping, and improving the success rate of the lid 203 dropping in a preset direction.

Referring to fig. 4, the second jaw 105 includes a second abutment surface 116, the second abutment surface 116 is configured to clamp the cover 203 together with the first jaw 104, and the second abutment surface 116 is configured to be planar, so as to reduce the complexity of the shape of the second jaw 105, thereby reducing the difficulty of processing the second jaw 105.

In an embodiment, the first jaw 104 is configured such that the first jaw 104 remains stationary during the movement of the second jaw 105 from the second clamping position to the open position driven by the drive mechanism 102. Wherein referring to fig. 3 and 4, "first jaw 104 remains stationary" is understood to mean that lid opening hook 106 remains in the first gripping position. Since the first clamping jaw 104 is kept fixed, the cover opening hook 106 supporting the bottom surface of the cover 203 does not move in the horizontal direction during the process of opening the first clamping jaw 104 and the second clamping jaw 105 to each other, and the cover 203 is not driven by the cover opening hook 106 to move horizontally. In this way, the position immediately before the cover 203 is dropped is fixed, and the dropping direction of the cover 203 is not affected by the horizontal movement of the cover 203 itself, and the controllability of the dropping direction of the cover 203 and the accuracy of the dropping position of the cover 203 are higher.

As described above, the second jaw 105 is configured to abut an outer surface of the cover 203 beyond the bottom surface. Referring to fig. 3, in an embodiment, the second jaw 105 is configured such that the second jaw 105 abuts a side of the cover 203 to engage the first jaw 104 to clamp the cover 203, and the movement of the second jaw 105 from the second clamping position to the open position includes a component of movement in a horizontal direction. The second jaw 105 may be moved in a horizontal direction during the movement from the second clamping position to the open position, or the second jaw 105 may be rotated upwards with reference to fig. 3 and 4, during which the horizontal position of the portion of the second jaw 105 for abutment against the cover 203 may be changed. Since the first clamping jaw 104 and the second clamping jaw 105 are both abutted against the side face of the cover 203, when the cover 203 is clamped by the first clamping jaw 104 and the second clamping jaw 105, the cover 203 is not easy to move horizontally, and the position stability of the cover 203 is high.

The second jaw 105 may not abut against the side surface of the cover 203. For example, referring to fig. 5, in another embodiment, the second jaw 105 is configured such that the second jaw 105 abuts the top surface of the cover 203 to cooperate with the second jaw 105 to clamp the cover 203, and the movement of the second jaw 105 from the second clamping position to the open position includes a component of movement in the vertical direction. As shown in fig. 5, when the first jaw 104 and the second jaw 105 jointly clamp the lid 203, a portion of the lid 203 that is abutted by the lid opening hook 106 is a first portion 205, a portion of the lid 203 that is abutted by the second jaw 105 is a second portion 206, both the first portion 205 and the second portion 206 are disposed on the same side of the center of gravity, and the second portion 206 is located on a side of the first portion 205 that is away from the center of gravity. Taking fig. 5 as an example, the first portion 205 and the second portion 206 are both located at the left side of the center of gravity, and the second portion 206 is located at the left side of the first portion 205. As shown in fig. 6, the second jaw 105 may be moved vertically upward during movement of the second jaw 105 from the second gripping position to the open position, and in other embodiments, the bottom end of the second jaw 105 may be rotated upward when movement of the second jaw 105 to the open position is desired. Based on the relative positions of the first portion 205 and the second portion 206, the lid 203 does not fall off immediately after being separated from the container body 202, so as not to have the lid 203 fallen off when the lid receiving hopper 103 is not moved to a position where it can catch the lid 203. Specifically, with one end of the lid opening hook 106 for abutting against the lid 203 as a fulcrum, the moment generated by the force applied to the second portion 206 by the second jaw 105 and the moment generated by the gravity of the lid 203 can cancel each other, the lid 203 can be smoothly gripped by the first jaw 104 and the second jaw 105, and the lid 203 is not easily dropped before the first jaw 104 and the second jaw 105 are opened to each other.

In some embodiments, the door opening mechanism 101 further includes a first barrier 107 and a second barrier 118. Fig. 7 shows the fitting relationship of the first jaw 104, the second jaw 105, the first stopper 107, the second stopper 118, and the cover 203 in the case where the first stopper 107 and the second stopper 118 are both connected to the first jaw 104. Referring to fig. 7, when the first jaw 104 and the second jaw 105 jointly clamp the cover 203, a portion of the cover 203 abutted by the cover opening hook 106 is spaced from the center of gravity 204 of the cover 203 along a first horizontal direction, the cover opening mechanism 101 further includes a first blocking portion 107 and a second blocking portion 118 distributed along a second horizontal direction, the first blocking portion 107 and the second blocking portion 118 are connected to the first jaw 104 (the first blocking portion 107 and/or the second blocking portion 118 may be connected to a side portion of the connecting body 113), the second direction and the first direction are perpendicular to each other, a gap for accommodating the cover 203 is provided between the first blocking portion 107 and the second blocking portion 118, and the first blocking portion 107 is used for limiting the cover 203 in the second direction. For example, referring to fig. 7, the first direction corresponds to the left-right direction, the second direction corresponds to the front-rear direction, the first blocking portion 107 is provided in front of the second blocking portion 118, when the first jaw 104 and the second jaw 105 clamp the cover 203, the cover 203 is provided in the gap, both the first blocking portion 107 and the second blocking portion 118 abut against the side surface of the cover 203, the first blocking portion 107 blocks the forward movement of the cover 203, and the second blocking portion 118 blocks the backward movement of the cover 203.

In the case where the lid opening mechanism 101 includes the first blocking portion 107 and the second blocking portion 118, when the lid 203 is gripped by the first and second jaws 104, 105, the lid 203 is restrained in both the first and second directions, and the lid 203 is not easily biased. On the other hand, in the process of throwing the cap, the first blocking portion 107 and the second blocking portion 118 can block the cap 203 from rotating along the second direction, so that the risk of the cap 203 rotating along other directions than the first direction is reduced, and the controllability of the falling direction of the cap 203 and the accuracy of the falling position are improved.

In order to limit the cover 203 in the second direction, the first blocking portion 107 and the second blocking portion 118 may be disposed at other positions, as long as the force applied to the cover 203 by the first blocking portion 107 has a component force that is not zero in the second direction, and the force applied to the cover 203 by the second blocking portion 118 has a component force that is not zero in the second direction. For example, referring to fig. 8, in another embodiment, both the first stop 107 and the second stop 118 are connected to the second jaw 105. For another example, referring to fig. 9, neither the first blocking portion 107 nor the second blocking portion 118 is connected to any one of the clamping jaws, the first blocking portion 107 is provided separately from the first clamping jaw 104 and the second clamping jaw 105, the second blocking portion 118 is provided separately from the first clamping jaw 104 and the second clamping jaw 105, and the first blocking portion 107 and the second blocking portion 118 may be connected to a certain bracket 110 of the sample analyzer. For another example, referring to fig. 10, in another embodiment, one of the first and second stops 107, 118 is connected to the first jaw 104 and the other is connected to the second jaw 105.

Referring to fig. 7, in the case where both the first blocking portion 107 and the second blocking portion 118 are connected to the first jaw 104, the first blocking portion 107 and the second blocking portion 118 may also satisfy a condition that a distance of the first blocking portion 107 and the second blocking portion 118 in the second direction gradually increases in a direction from the first jaw 104 to the second jaw 105 (may correspond to a left-to-right direction in fig. 7) such that the first blocking portion 107 and the second blocking portion 118 abut the cover 203 in the first direction and clamp the cover 203 in cooperation with the second jaw 105. "the first blocking portion 107 and the second blocking portion 118 abut the cover 203 in the first direction" means that the force applied to the cover 203 by the first blocking portion 107 has a component force that is not zero in the first direction, and the force applied to the cover 203 by the second blocking portion 118 has a component force that is not zero in the first direction. Based on the distance change relationship between the first blocking portion 107 and the second blocking portion 118, the width of the opening side of the gap is larger, the cover 203 is easier to get in and out of the gap, and the cover 203 is less likely to get stuck during the process of getting in and out of the gap. The abutment of the first blocking portion 107 and the second blocking portion 118 against the cover 203 in the first direction enables the lid opening mechanism 101 to more stably clamp the cover 203 in the first direction. In fig. 7, the first jaw 104 does not directly contact the side surface of the cover 203, and at this time, the first jaw 104 and the second jaw 105 clamp the cover 203, it is understood that the first jaw 104 indirectly presses the side surface of the cover 203 through the first blocking portion 107 and the second blocking portion 118, thereby clamping the cover 203 with the second jaw 105 in the horizontal direction (the horizontal direction is specifically, the first direction).

Similarly, as shown in FIG. 8, in the case where both the first blocking portion 107 and the second blocking portion 118 are connected to the second holding jaw 105, the first blocking portion 107 and the second blocking portion 118 may also satisfy the condition that the distance of the first blocking portion 107 and the second blocking portion 118 in the second direction gradually increases in the direction from the second holding jaw 105 to the first holding jaw 104 (may correspond to the right-to-left direction in FIG. 8) so that the first blocking portion 107 and the second blocking portion 118 abut the cover 203 in the first direction and hold the cover 203 in cooperation with the first holding jaw 104. This arrangement can improve the smoothness of the cover 203 in entering and exiting the gap while enabling the cover opening mechanism 101 to sandwich the cover 203 more stably in the first direction. In fig. 8, the second jaw 105 does not directly contact the side surface of the cover 203, and at this time, the first jaw 104 and the second jaw 105 clamp the cover 203, it is understood that the second jaw 105 indirectly presses the side surface of the cover 203 through the first blocking portion 107 and the second blocking portion 118, so as to clamp the cover 203 with the first jaw 104 in the horizontal direction (the horizontal direction is specifically the first direction).

The drive mechanism 102 is described further below.

In some embodiments, the drive mechanism 102 may include a lift power source and a deployment power source. The opening and closing power source can drive the first jaw 104 and the second jaw 105 to close each other so that the first jaw 104 and the second jaw 105 clamp the cover 203, and can also drive the first jaw 104 and the second jaw 105 to open each other so that the first jaw 104 and the second jaw 105 unclamp the cover 203. The lifting power source is used for lifting the opening and closing power source, so that the first clamping jaw 104 and the second clamping jaw 105 are driven to lift. The opening and closing power source can be arranged as an air cylinder, an oil cylinder, a linear motor, an electromagnet and the like, and the lifting power source can be arranged as an air cylinder, an oil cylinder, a linear motor, a screw rod module and the like.

In other embodiments, the drive mechanism 102 may include only one lift power source in order to save the number of power sources to reduce the cost of the sample analyzer. As shown in fig. 11, the cover opening mechanism 101 further includes a connecting seat 108, the first clamping jaw 104 and the second clamping jaw 105 are movably connected with the connecting seat 108, the connecting seat 108 is connected with a lifting power source, and the lifting power source is connected with the connecting seat 108 and drives the connecting seat 108 to lift.

In the case where the driving mechanism 102 is provided with only a lifting power source, the clamping of the cover 203 by the first and second jaws 104 and 105 can be achieved by the gravity of the first and second jaws 104 and 105. The first clamping jaw 104 and the second clamping jaw 105 are both rotatably connected with the connecting seat 108, and the cover opening hook 106 is configured to be kept at a first clamping position under the action of gravity of the first clamping jaw 104, and the second clamping jaw 105 is kept at a second clamping position under the action of gravity of the second clamping jaw. For example, the first gripper jaw 104 includes an upper gripper jaw segment located on an upper side of a rotational center of the first gripper jaw 104, and a lower gripper jaw segment located on a lower side of the rotational center of the first gripper jaw 104, and the lid opening hook 106 is located on the lower gripper jaw segment. When the first jaw 104 is in the first clamping position, the first jaw 104 is slightly inclined, the center of gravity of the upper jaw section is located to the left of the center of rotation, the center of gravity of the lower jaw section is located to the right of the center of rotation, the center of gravity of the upper jaw section is located to the left above the center of gravity of the lower jaw section, and the moment generated by the gravity of the upper jaw section is greater than the moment generated by the gravity of the lower jaw section. In this way, the lower jaw section will rotate upwards and have a tendency to move to the right, approaching the second jaw 105, the first jaw 104 will have a tendency to abut the cover 203, and the first jaw 104 will remain in the first gripping position under its own weight. The specific manner in which the second jaw 105 is held in the second gripping position under its own weight is similar to that described above and will not be repeated here.

Or in the case where the driving mechanism 102 is provided with only a lifting power source, the clamping of the cover 203 by the first and second jaws 104 and 105 can be achieved by the elastic force of the elastic member. For example, referring to fig. 12, in an embodiment, the cover opening mechanism 101 includes a first elastic member 111, two ends of the first elastic member 111 are respectively connected to the first clamping jaw 104 and the connection seat 108, and the elastic force of the first elastic member 111 is used to drive the first clamping jaw 104 and the second clamping jaw 105 to approach each other. The first elastic member 111 may be provided as a tension spring, and when the first clamping jaw 104 is in the first clamping position, the first elastic member 111 is in a stretched state, and the first elastic member 111 has a tendency to drive the first clamping jaw 104 and the second clamping jaw 105 toward each other, thereby causing the first clamping jaw 104 and the second clamping jaw 105 to clamp the cover 203. For another example, referring to fig. 12, in an embodiment, the cover opening mechanism 101 includes a second elastic member 112, two ends of the second elastic member 112 are respectively connected to the second clamping jaw 105 and the connection seat 108, and an elastic force of the second elastic member 112 is used to drive the second clamping jaw 105 and the first clamping jaw 104 to approach each other. The second elastic member 112 may also be provided as a tension spring, and when the second clamping jaw 105 is in the second clamping position, the second elastic member 112 is in a stretched state, and the second elastic member 112 has a tendency to drive the first clamping jaw 104 and the second clamping jaw 105 toward each other, thereby causing the first clamping jaw 104 and the second clamping jaw 105 to clamp the cover 203. For another example, the cover opening mechanism 101 includes a third elastic member (not shown) having both ends connected to the first jaw 104 and the second jaw 105, respectively, and the third elastic member may be provided as a tension spring, and when the first jaw 104 is in the first gripping position and the second jaw 105 is in the second gripping position, the third elastic member is in a stretched state, and the third elastic member has a tendency to drive the first jaw 104 and the second jaw 105 toward each other, thereby causing the first jaw 104 and the second jaw 105 to grip the cover 203. In addition, the cover opening mechanism 101 may include at least one of the first elastic member 111, the second elastic member 112, and the third elastic member.

It was mentioned above how the first jaw 104 and the second jaw 105 are caused to grip the cover 203 in the case where the drive mechanism 102 is provided with only the lifting power source, and the following description is made on how the first jaw 104 and the second jaw 105 are opened in the case where the drive mechanism 102 is provided with only the lifting power source.

In the case where the second jaw 105 abuts against a side of the cover 203, when the first jaw 104 and the second jaw 105 need to be opened and then clamp the cover 203, the opening of the first jaw 104 and the second jaw 105 may be pushed by the cover 203 of the sample container 201.

As shown in fig. 3, the lid opening hook 106 has a first guide surface 115, and the tip of the first guide surface 115 is connected to one end of the first abutment surface 114 for abutment with the lid 203. The second jaw 105 has a second guide surface 117, the top end of the second guide surface 117 being connected to the bottom end of the second abutment surface 116. The first guide surface 115 and the second guide surface 117 are disposed obliquely. In the process of driving the first jaw 104 and the second jaw 105 to descend by the lifting power source, the first guide surface 115 and the second guide surface 117 abut against the edge portion of the top surface of the cover 203, and referring to fig. 1, 11 and 12 in sequence, since the first guide surface 115 and the second guide surface 117 are inclined, as the first jaw 104 and the second jaw 105 gradually descend, the cover 203 pushes the first jaw 104 and the second jaw 105 to horizontally move, thereby driving the first jaw 104 and the second jaw 105 to open each other so that the first jaw 104 and the second jaw 105 can descend to a position suitable for clamping the cover 203. Subsequently, the first jaw 104 and the second jaw 105 are closed and clamp the cover 203.

Referring to fig. 12, the cover opening mechanism 101 further includes an upper limiting member 109, the upper limiting member 109 is fixedly connected with the connecting seat 108, the upper limiting member 109 is lifted synchronously with the connecting seat 108, and the upper limiting member 109 is lifted synchronously with the first clamping jaw 104 and the second clamping jaw 105. An upper limit 109 is provided between the first jaw 104 and the second jaw 105. When the connection base 108 is driven by the driving mechanism 102 to move downward to the abutment position, the bottom surface of the upper stopper 109 abuts against the top surface of the cover 203 to restrict the connection base 108 from moving downward, and at this time, the lid opening hook 106 abuts against the bottom surface of the cover 203 or is lower than the bottom surface of the cover 203. The upper stop 109 prevents the first jaw 104 and the second jaw 105 from being positioned too low, thereby reducing the risk that the first jaw 104 and the second jaw 105 cannot accurately grip the cover 203. And after the connection holder 108 is moved to the abutment position, the driving mechanism 102 drives the connection holder 108 to move upward, and the first and second jaws 104 and 105 pull the cover 203 out of the top of the container body 202.

Further, referring to fig. 12, the first elastic member 111 has a tendency to drive the first clamping jaw 104 to move rightward. In order to keep the first clamping jaw 104 fixed during the cap throwing process, when the cap opening hook 106 is at the first clamping position, the first elastic member 111 is in a stretched state, and the upper limiting member 109 abuts against the first clamping jaw 104 (as shown in fig. 3), and the upper limiting member 109 limits the first clamping jaw 104. In this way, the elastic force of the first elastic member 111 applied to the first clamping jaw 104 and the acting force of the upper limit member 109 applied to the first clamping jaw 104 are balanced with each other, so that the first clamping jaw 104 remains fixed during cap throwing.

Referring to fig. 13, the cover opening mechanism 101 further includes an abutment 119, and the driving mechanism 102 and the abutment 119 are mounted on the same bracket 110. When the first jaw 104 and the second jaw 105 need to be opened to allow the cover 203 to fall, the second jaw 105 is pushed by the abutment 119, so that the opening of the first jaw 104 and the second jaw 105 is achieved. More specifically, the second jaw 105 is rotatably connected to the connection base 108, and after the lid 203 is pulled out by the lid opening mechanism 101, the driving mechanism 102 drives the connection base 108 to continue to rise a certain distance until the top end of the second jaw 105 abuts against the abutment 119, and after the top end of the second jaw 105 abuts against the abutment 119, as the connection base 108 continues to rise to the position shown in fig. 13, the abutment 119 pushes the top end of the second jaw 105 to rotate, and the bottom end of the second jaw 105 rotates upward and away from the lid 203 (during which the first jaw 104 remains stationary). In this way, the opening of the second jaw 105 during the cap ejection is achieved.

As the connecting base 108 rises, the lid receiving hopper 103 also moves gradually under the first jaw 104, and when the second jaw 105 opens, the lid 203 drops into the lid receiving hopper 103. The cover receiving hopper 103 can be driven by another power source, or can be connected with the cover opening mechanism 101 through some linkage mechanisms, and under the action of the linkage mechanisms, the cover receiving hopper 103 gradually moves to the lower part of the first clamping jaw 104 along with the rising of the connecting seat 108. After the cap is thrown, the driving mechanism 102 drives the connecting seat 108 to descend, so that the abutting piece 119 is separated from the second clamping jaw 105, and the second clamping jaw 105 is reset under the action of self gravity or the action of the elastic force of the second elastic piece 112.

In one embodiment, the lifting power source may include a motor, a first pulley, a second pulley, and a belt. The driving mechanism 102 further comprises a bracket 110, a motor is mounted on the bracket 110, the motor is connected with the first belt pulley and drives the first belt pulley to rotate, the second belt pulley is rotatably mounted on the bracket 110, the first belt pulley is arranged below the second belt pulley at intervals, and the belt is wound around the first belt pulley and the second belt pulley. The connection block 108 is fixedly connected with the belt, and the section of the belt for connection with the connection block 108 is vertically arranged. When the motor drives the first belt pulley to rotate, the belt moves and drives the connecting seat 108 to lift, so that the first clamping jaw 104 and the second clamping jaw 105 lift.

In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A sample analyzer, comprising:

A fixing mechanism, the fixing mechanism is used to fix a container body of a sample container, the sample container comprises the container body for accommodating the sample and a cover for sealing the container body;

A sample dispensing mechanism, used for sucking the sample in the container body and discharging it into a reaction cup;

A reagent dispensing mechanism, used for sucking the reagent and discharging it into the reaction cup;

A mixing mechanism, used for mixing the reaction liquid in the reaction cup, wherein the reaction liquid is at least a mixture of the sample and the reagent;

A reaction mechanism, used for placing the reaction cup and incubating the reaction liquid in the reaction cup;

A detection mechanism, used to detect the reaction solution after incubation to obtain a detection result;

A cover opening mechanism, the cover opening mechanism comprising a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are used to clamp the cover together, the first clamping jaw comprises a cover opening hook, the cover opening hook is used to abut against the bottom surface of the cover at a first clamping position, and the second clamping jaw is used to abut against other outer surfaces of the cover except the bottom surface at a second clamping position, when the first clamping jaw and the second clamping jaw clamp the cover together, there is a gap between the part of the cover abutted by the cover opening hook and the center of gravity of the cover in the horizontal direction;

a driving mechanism, configured to drive the first clamping jaw and the second clamping jaw to rise so as to separate the cover from the container body, and to drive the second clamping jaw to move from a second clamping position to an open position after the cover is separated from the container body so as to drop the cover; wherein when the second clamping jaw is in the open position, there is a gap between the second clamping jaw and the cover;

The recovery mechanism is used for recovering the cover dropped from the cover opening mechanism.

2 . The sample analyzer according to claim 1 , wherein the first clamping jaw is configured to remain fixed during the process in which the driving mechanism drives the second clamping jaw to move from the second clamping position to the open position.

3. The sample analyzer according to claim 1 is characterized in that the second clamping jaw is configured to abut against the side of the cover to cooperate with the first clamping jaw to clamp the cover, and the movement of the second clamping jaw from the second clamping position to the open position includes a movement component along the horizontal direction.

4. The sample analyzer according to claim 1, wherein the second clamping jaw is configured to abut against the top surface of the cover to cooperate with the first clamping jaw to clamp the cover, and the movement of the second clamping jaw from the second clamping position to the open position includes a movement component in the vertical direction;

Among them, when the first clamp and the second clamp jointly clamp the cover, the part of the cover abutted by the cover opening hook is the first part, and the part of the cover abutted by the second clamp is the second part, the first part and the second part are both arranged on the same side of the center of gravity, and the second part is located on the side of the first part away from the center of gravity.

5. The sample analyzer according to claim 1, characterized in that when the first clamping jaw and the second clamping jaw jointly clamp the cover, there is a gap between the portion of the cover abutted by the cover-opening hook and the center of gravity of the cover along a first horizontal direction, the cover-opening mechanism further comprises a first blocking portion and a second blocking portion distributed along a second horizontal direction, the second direction is perpendicular to the first direction, there is a gap between the first blocking portion and the second blocking portion for accommodating the cover, and the first blocking portion and the second blocking portion are used to limit the cover in the second direction;

Wherein, the first blocking portion and the second blocking portion are both connected to the first clamping claw;

Alternatively, the first blocking portion and the second blocking portion are both connected to the second clamping jaw;

Alternatively, one of the first blocking portion and the second blocking portion is connected to the first clamping jaw, and the other is connected to the second clamping jaw;

Alternatively, the first blocking portion is separately provided from the first clamping jaw and the second clamping jaw, and the second blocking portion is separately provided from the first clamping jaw and the second clamping jaw.

6. The sample analyzer according to claim 5, characterized in that the first blocking portion and the second blocking portion are both connected to the first clamping jaw, and along the direction from the first clamping jaw to the second clamping jaw, the distance between the first blocking portion and the second blocking portion in the second direction gradually increases, so that the first blocking portion and the second blocking portion abut against the cover along the first direction to cooperate with the second clamping jaw to clamp the cover;

Alternatively, the first blocking portion and the second blocking portion are both connected to the second clamping jaw, and along the direction from the second clamping jaw to the first clamping jaw, the distance between the first blocking portion and the second blocking portion in the second direction gradually increases, so that the first blocking portion and the second blocking portion abut against the cover along the first direction to cooperate with the first clamping jaw to clamp the cover.

7. The sample analyzer according to claim 1, characterized in that the cover opening mechanism further comprises a connecting seat, the first clamping jaw and the second clamping jaw are both rotatably connected to the connecting seat, and the driving mechanism is connected to the connecting seat;

The cover opening hook is configured to be maintained at the first clamping position under the action of the gravity of the first clamping jaw, and the second clamping jaw is configured to be maintained at the second clamping position under the action of its own gravity.

8. The sample analyzer according to claim 1, characterized in that the cover opening mechanism comprises a connecting seat, the first clamping jaw and the second clamping jaw are both movably connected to the connecting seat, and the driving mechanism is connected to the connecting seat;

The cover opening mechanism also includes:

a first elastic member, wherein two ends of the first elastic member are respectively connected to the first clamping jaw and the connecting seat, and the elastic force of the first elastic member is used to drive the first clamping jaw and the second clamping jaw to approach each other;

and/or,

a second elastic member, wherein two ends of the second elastic member are respectively connected to the second clamping jaw and the connecting seat, and the elastic force of the second elastic member is used to drive the first clamping jaw and the second clamping jaw to approach each other;

and/or,

A third elastic member, two ends of which are respectively connected to the first clamping jaw and the second clamping jaw, and the elastic force of the third elastic member is used to drive the first clamping jaw and the second clamping jaw to approach each other.

9. The sample analyzer according to claim 3, characterized in that the cover opening mechanism further comprises a connecting seat and an upper limit member, the first clamping jaw and the second clamping jaw are both movably connected to the connecting seat, the driving mechanism is connected to the connecting seat, and the driving mechanism is used to drive the connecting seat to rise and fall; the upper limit member is fixedly connected to the connecting seat, and the upper limit member is arranged between the first clamping jaw and the second clamping jaw;

When the connecting seat is driven by the driving mechanism to move downward to the abutment position, the bottom surface of the upper limit member abuts against the top surface of the cover to limit the downward movement of the connecting seat, and the cover opening hook abuts against the bottom surface of the cover or is lower than the bottom surface of the cover.

10. The sample analyzer according to claim 1 is characterized in that the first clamp also includes a connecting body, the cover opening hook is connected to the connecting body, and the cover opening hook includes a first abutting surface, the first abutting surface is arranged at the top of the cover opening hook, and the end of the first abutting surface away from the connecting body is used to abut against the bottom surface of the cover, and the height of the first abutting surface gradually increases from the end of the first abutting surface close to the connecting body to the end of the first abutting surface away from the connecting body.

11. The sample analyzer according to claim 1, characterized in that the first clamping jaw further comprises a connecting body, the cover opening hook is connected to the connecting body, and an end of the cover opening hook away from the connecting body is used to abut against the bottom surface of the cover;

When the first clamping jaw and the second clamping jaw clamp the cover together, the horizontal distance between the part of the cover abutted by the cover-opening hook and the connecting body is smaller than the horizontal distance between the center of gravity of the cover and the connecting body.

12 . The sample analyzer according to claim 1 , wherein the second clamping jaw comprises a second abutting surface, the second abutting surface is used to clamp the cover with the first clamping jaw, and the second abutting surface is a plane.

13. A sample analyzer, characterized in that it comprises:

A cover opening mechanism, the cover opening mechanism comprising a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are used to clamp the cover of the sample container together, the first clamping jaw comprises a cover opening hook, the cover opening hook is used to abut against the bottom surface of the cover at a first clamping position, and the second clamping jaw is used to abut against other outer surfaces of the cover except the bottom surface at a second clamping position, when the first clamping jaw and the second clamping jaw clamp the cover together, there is a gap between the part of the cover abutted by the cover opening hook and the center of gravity of the cover in the horizontal direction;

A driving mechanism is used to drive the first clamping jaw and the second clamping jaw to rise so that the cover is separated from the container body of the sample container, and to drive the second clamping jaw to move from the second clamping position to the open position after the cover is separated from the container body so that the cover falls off; wherein when the second clamping jaw is in the open position, there is a gap between the second clamping jaw and the cover.