Sample analyzer

Abstract

The invention provides a sample analyzer which comprises a cover opening mechanism and a driving mechanism, the cover opening mechanism comprises a first clamping jaw and a second clamping jaw which are used for jointly clamping a cover, the first clamping jaw comprises a cover opening hook, the cover opening hook is used for abutting against the bottom surface of the cover, and the second clamping jaw is used for abutting against other outer surfaces except the bottom surface of the cover. When the first clamping jaw and the second clamping jaw clamp the cover together, an interval exists between the part, abutted by the cover opening hook, of the cover and the gravity center of the cover in the horizontal direction, and the driving mechanism is used for driving the first clamping jaw and the second clamping jaw to ascend to achieve cover opening. And after the cover is separated from the container main body, the second clamping jaw is driven to move from the second clamping position to the opening position so as to enable the cover to fall off. According to the sample analyzer, the controllability of the falling direction of the cover can be improved, and the risk of deviation of the falling position of the cover is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a sample analyzer. Background Art

[0002] The working process of the sample analyzer involves two operations: opening the cover and throwing away the cover of the sample container. The cover opening mechanism in the sample analyzer usually includes a plurality of clamps. After the clamps clamp the cover of the sample container, the driving mechanism in the sample analyzer causes the clamps to rise, thereby pulling out the cover. When it is necessary to throw away the cover, the clamps open to loosen the cover, and the cover falls into the collection container of the sample analyzer for collecting discarded covers, so as to prevent the discarded covers from contaminating the internal working environment of the sample analyzer and to prevent the discarded covers from getting stuck in certain parts and causing the sample analyzer to malfunction. However, in the prior art, the controllability of the falling direction of the cover after the clamps are opened is poor, the falling position of the cover (referring to the final landing point of the cover) is prone to deviation, and the risk of the cover falling outside the container for collecting the cover is high. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a sample analyzer that can improve the controllability of the falling direction of the cover and reduce the risk of deviation in the falling position of the cover.

[0004] The sample analyzer according to an embodiment of the present invention comprises: a fixing mechanism, the fixing mechanism is used to fix the container body of the 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 to absorb the sample in the container body and discharge it into a reaction cup; a reagent dispensing mechanism, used to absorb the reagent and discharge it into the reaction cup; a mixing mechanism, used to mix the reaction liquid in the reaction cup, the reaction liquid is at least a mixture of the sample and the reagent; a reaction mechanism, used to place the reaction cup and incubate the reaction liquid in the reaction cup; a detection mechanism, used to measure the reaction liquid after incubation to obtain a detection result; and a cover opening mechanism, the cover opening mechanism comprises a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are used to clamp together The container body comprises a lid-opening hook for holding the lid, wherein the lid-opening hook is used to abut against the bottom surface of the lid in a first clamping position, and the second clamping jaw is used to abut against other outer surfaces of the lid except the bottom surface in a second clamping position, and when the first clamping jaw and the second clamping jaw jointly clamp the lid, there is a gap between the portion of the lid abutted by the lid-opening hook and the center of gravity of the lid 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 lid is separated from the container body, and drive the second clamping jaw to move from the second clamping position to the open position after the lid is separated from the container body, so that the lid falls off; wherein when the second clamping jaw is in the open position, there is a gap between the second clamping jaw and the lid; a recovery mechanism is used to recover the lid that falls from the lid-opening mechanism.

[0005] The sample analyzer according to the embodiment of the present invention has at least the following beneficial effects: since the first jaw abuts against the bottom surface of the lid and the second jaw does not abut against the bottom surface of the lid, the lid will briefly stay on the first jaw after the first jaw and the second jaw are opened; and since the portion of the lid abutted by the lid opening hook in the horizontal direction is located on one side of the center of gravity of the lid, the lid staying on the first jaw will fall in a preset direction under the action of its own gravity. Among them, the portion of the lid abutted by the lid opening hook and the center of gravity of the lid are arranged in sequence according to the preset direction. Therefore, the sample analyzer of the present invention can improve the controllability of the lid's falling direction and reduce the risk of deviation in the lid's falling position.

[0006] According to some embodiments of the present invention, 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.

[0007] According to some embodiments of the present invention, the second clamp is configured to abut against a side of the cover to cooperate with the first clamp to clamp the cover, and the movement of the second clamp from the second clamp position to the open position includes a movement component in a horizontal direction.

[0008] According to some embodiments of the present invention, the second jaw is configured to abut against the top surface of the cover to cooperate with the first jaw in clamping the cover, and the movement of the second jaw from the second clamping position to the open position includes a movement component along the vertical direction; wherein, when the first jaw and the second jaw jointly clamp the cover, the portion of the cover abutted by the cover opening hook is the first portion, and the portion of the cover abutted by the second jaw is the second portion, the first portion and the second portion are both arranged on the same side of the center of gravity, and the second portion is located on the side of the first portion away from the center of gravity.

[0009] According to some embodiments of the present invention, when the first clamp and the second clamp jointly clamp the cover, there is a gap between the portion of the cover where the cover is abutted by the cover opening hook and the center of gravity of the cover along a first horizontal direction, and the cover opening mechanism also includes a first blocking portion and a second blocking portion distributed along a second horizontal direction, the second direction is perpendicular to the first direction, and 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 clamp; or, the first blocking portion and the second blocking portion are both connected to the second clamp; or, one of the first blocking portion and the second blocking portion is connected to the first clamp, and the other is connected to the second clamp; or, the first blocking portion is separately arranged with the first clamp and the second clamp, and the second blocking portion is separately arranged with the first clamp and the second clamp.

[0010] According to some embodiments of the present invention, the first blocking portion and the second blocking portion are both connected to the first clamp, and along the direction from the first clamp to the second clamp, 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 clamp to clamp the cover; or, the first blocking portion and the second blocking portion are both connected to the second clamp, and along the direction from the second clamp to the first clamp, 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 clamp to clamp the cover.

[0011] According to some embodiments of the present invention, the cover opening mechanism also includes 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 remain in the first clamping position under the action of the gravity of the first clamping jaw, and the second clamping jaw is maintained in the second clamping position under the action of its own gravity.

[0012] According to some embodiments of the present invention, the cover opening mechanism includes a connecting seat, the first clamping jaw and the second clamping jaw are 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, the 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, the 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, the two ends of the third elastic member 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.

[0013] According to some embodiments of the present invention, the cover opening mechanism also includes a connecting seat and an upper limit positioning 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 positioning member is fixedly connected to the connecting seat, and the upper limit positioning member is arranged between the first clamping jaw and the second clamping jaw; wherein, when the connecting seat is driven by the driving mechanism to move downward to the abutment position, the bottom surface of the upper limit positioning 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.

[0014] According to some embodiments of the present invention, 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.

[0015] According to some embodiments of the present invention, the first clamping jaw also includes a connecting body, the cover opening hook is connected to the connecting body, and the 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 jointly clamp the cover, 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.

[0016] According to some embodiments of the present invention, the second clamping jaw includes 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.

[0017] According to some embodiments of the present invention, the sample analyzer includes: a cover opening mechanism, the cover opening mechanism includes a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are used to jointly clamp the cover of the sample container, the first clamping jaw includes 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 jointly clamp the cover, 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 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; wherein when the second clamping jaw is in the open position, there is a gap between the second clamping jaw and the cover.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 A schematic diagram of a cover opening mechanism and a driving mechanism of a sample analyzer according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the cover opening mechanism in FIG.

[0022] Figure 3 for Figure 1 A schematic diagram of the first clamping jaw and the second clamping jaw clamping the cover;

[0023] Figure 4 for Figure 3A schematic diagram of the second clamping jaw moving to an open position;

[0024] Figure 5 Schematic diagram of a cover opening mechanism in which the second clamping jaw is used to abut against the top surface of the cover in an embodiment of the present invention;

[0025] Figure 6 for Figure 5 A schematic diagram of the second clamping jaw moving to an open position;

[0026] Figure 7 for Figure 3 A cross-sectional view of the structure shown along section AA;

[0027] Figure 8 It is a schematic diagram of the cover opening mechanism clamping the cover when both the first blocking portion and the second blocking portion are connected to the second clamping claw;

[0028] Fig. 9 It is a schematic diagram of the cover opening mechanism clamping the cover when the first blocking portion and the second blocking portion are not connected to any clamping claw;

[0029] Fig.10 A schematic diagram of the cover opening mechanism clamping the cover when the first blocking portion and the second blocking portion are respectively connected to different clamping claws;

[0030] Fig.11 for Figure 1 A schematic diagram of the cover opening mechanism when the second guide surface abuts against the cover;

[0031] Fig.12 for Figure 1 A schematic diagram of the cover opening mechanism when the upper limit member abuts against the cover;

[0032] Fig.13 for Figure 1 A schematic diagram of the cover opening mechanism in FIG. 1 when the second clamping claw abuts against the abutment member.

[0033] Reference numerals:

[0034] 101-cover opening mechanism, 102-driving mechanism, 103-cover receiving bucket, 104-first clamping jaw, 105-second clamping jaw, 106-cover opening hook, 107-first blocking portion, 108-connecting seat, 109-upper limit member, 110-bracket, 111-first elastic member, 112-second elastic member, 113-connecting body, 114-first abutting surface, 115-first guide surface, 116-second abutting surface, 117-second guide surface, 118-second blocking portion, 119-abutting member;

[0035] 201 - sample container, 202 - container body, 203 - cover, 204 - center of gravity, 205 - first part, 206 - second part. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figure 1 In one embodiment, the sample analyzer includes a cover opening mechanism 101 and a driving mechanism 102 , and the sample analyzer can open the cover of the sample container 201 and discard the cover. Figure 1 A sample container 201 is also shown, and the sample container 201 includes a container body 202 for accommodating a sample and a cover 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 the cover 203 is detachably connected to the top of the container body 202 and blocks the opening. The sample container 201 can be a test tube, a bottle, etc. In the drawings of the present invention, the sample containers 201 are all test tubes, and the container body 202 is the tube body of the test tube.

[0041] Figure 2 Shows Figure 1 The cover opening mechanism 101, Figure 3 Shows Figure 2 The state when the cover opening mechanism 101 clamps the cover 203. Figure 2 The cover opening mechanism 101 includes a first clamping jaw 104 and a second clamping jaw 105, and the first clamping jaw 104 and the second clamping jaw 105 are used to clamp the cover 203 together. The first clamping jaw 104 includes a cover opening hook 106, Figure 3 In the embodiment, the cover opening hook 106 is located at the first clamping position, and the cover opening hook 106 is used to abut against the bottom surface of the cover 203 at the first clamping position. Figure 3 When the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203 together, the portion of the cover 203 abutted by the cover opening hook 106 is spaced apart from the center of gravity 204 of the cover 203 in the horizontal direction. Figure 3 In the embodiment, the part of the cover 203 abutted by the cover opening hook 106 is located on the left side of the center of gravity 204 of the cover 203. When the cover 203 is cylindrical, the center of gravity 204 of the cover 203 is located on the central axis of the cover 203. Figure 3 The second clamping jaw 105 is in the second clamping position, and the second clamping jaw 105 is used to abut against the outer surface of the cover 203 other than the bottom surface at the second clamping position, and the second clamping jaw 105 abuts against the side surface of the cover 203 (such as Figure 3 In another embodiment, the second clamping jaw 105 may also abut against the top surface of the cover 203 (as shown in FIG. Figure 5 When 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.

[0042] When the cover opening hook 106 is in the first clamping position and the second clamping jaw 105 is in the second clamping position, the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203. After the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203 and the cover opening hook 106 abuts against the bottom surface of the cover 203, the driving mechanism 102 drives the first clamping jaw 104 and the second clamping jaw 105 to rise, and the cover 203 rises together with the first clamping jaw 104 and the second clamping jaw 105, and the cover 203 moves upward relative to the container body 202 to separate from the container body 202 (the container body 202 is fixed and does not rise together with the first clamping jaw 104 and the second clamping jaw 105). In this way, the cover of the sample container 201 is opened.

[0043] After the cover 203 is separated from the container body 202, the driving mechanism 102 drives the second clamping jaw 105 to move from the second clamping position to the open position, so that the cover 203 falls off. Figure 4 The second clamping jaw 105 is in the open position, and there is a gap between the portion of the second clamping jaw 105 that is used to abut the cover 203 and the cover 203. During the process of the second clamping jaw 105 moving from the second clamping position to the open position. After the second clamping jaw 105 moves to the open position, the first clamping jaw 104 and the second clamping jaw 105 release the cover 203. Figure 4As shown, since the first clamping jaw 104 is provided with a cover-opening hook 106 for abutting against the bottom surface of the cover 203 and the second clamping jaw 105 does not abut against the bottom surface of the cover 203, during the process of the first clamping jaw 104 and the second clamping jaw 105 opening mutually, the cover 203 will be initially supported by the first clamping jaw 104. Figure 4 As shown, with one end of the cover opening hook 106 abutting against the cover 203 as a fulcrum, the moment generated by the weight of the cover 203 itself causes the cover 203 to rotate (the top of the cover 203 rotates to the right), thereby causing the cover 203 to fall off the cover opening hook 106. In this way, the cover 203 is thrown away.

[0044] Since the first clamp 104 abuts against the bottom surface of the cover 203 and the second clamp 105 does not abut against the bottom surface of the cover 203, the cover 203 will briefly stay on the first clamp 104 after the first clamp 104 and the second clamp 105 are opened; and since the part of the cover 203 abutted by the cover opening hook 106 is located on one side of the center of gravity 204 of the cover 203 in the horizontal direction, the cover 203 staying on the first clamp 104 will fall in a preset direction under the action of its own gravity. Among them, the part of the cover 203 abutted by the cover opening hook 106 and the center of gravity 204 of the cover 203 are arranged in sequence according to the preset direction ( Figure 4 The preset direction is from left to right. 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 in the falling position of the cover 203.

[0045] In one embodiment, the sample analyzer may further include a fixing mechanism, a sample dispensing mechanism, a reagent dispensing mechanism, a mixing mechanism, a reaction mechanism, a detection mechanism, and a recovery mechanism.

[0046] The fixing mechanism is used to fix the container body 202. The fixing mechanism can be provided with a plurality of sample positions for placing the container body 202, and the fixing mechanism can clamp the container body 202 to fix the container body 202. After the fixing mechanism fixes the container body 202, the cover opening mechanism 101 can clamp the cover 203 and pull the cover 203 upward, so that the cover 203 is separated from the container body 202.

[0047] The sample dispensing mechanism is used to absorb the sample in the container body 202 and discharge it into the reaction cup. For example, the sample dispensing mechanism may include a sample needle and a first displacement mechanism for driving the sample needle to move, and the first displacement mechanism may be set as a two-dimensional or three-dimensional displacement platform. Driven by the first displacement mechanism, the sample needle can move to the opened sample container 201 and absorb the sample inside the sample container 201; after absorbing the sample, the sample needle moves to the reaction cup to be loaded with the sample under the drive of the first displacement mechanism, and then discharges the sample into the reaction cup.

[0048] The reagent dispensing mechanism is used to absorb the reagent and discharge it into the reaction cup. For example, the reagent dispensing mechanism may include a reagent needle and a second displacement mechanism for driving the reagent needle to move, and the second displacement mechanism may be set as a two-dimensional or three-dimensional displacement platform. Driven by the second displacement mechanism, the reagent needle can move to the reaction cup to be added with the reagent; then, the reagent needle discharges the reagent into the reaction cup. The reagent discharged by the reagent needle can be drawn from a container for storing the reagent of the reagent dispensing mechanism.

[0049] The mixing mechanism is used to mix the reaction liquid in the reaction cup so that the sample and the reagent are fully mixed. The reaction liquid is at least a mixture of the sample and the reagent. The mixing mechanism can fix the reaction cup and drive the reaction cup to perform periodic motion, thereby achieving mixing of the reaction liquid.

[0050] The reaction mechanism is used to place the reaction cup and incubate the reaction liquid in the reaction cup. The reaction mechanism has at least one placement position for placing the reaction cup. After mixing, the reaction cup will be placed in the reaction mechanism.

[0051] The detection mechanism is used to measure the reaction solution after incubation to obtain the detection result. For example, the detection mechanism includes an instrument for measuring a certain component; for another example, the detection mechanism includes a light measuring component, which detects the luminous intensity of the reaction solution so that the detection mechanism can calculate the concentration of the component to be measured in the sample.

[0052] The recycling mechanism is used to recycle the lid 203 dropped from the lid opening mechanism 101. For example, the recycling mechanism includes a recycling container with an opening at the top, and the recycling container is used to collect the discarded lids 203. The recycling mechanism can also include a movable lid receiving bucket 103 (such as Figure 1 As shown), after the lid opening process is completed, the lid receiving bucket 103 can move to the bottom of the first clamping jaw 104, and the lid 203 can fall into the lid receiving bucket 103 after falling from the first clamping jaw 104, and then the lid 203 slides along the inclined lid receiving bucket 103 into the recycling container.

[0053] Reference Figure 3, the cover opening hook 106 includes a first abutting surface 114, and the first abutting surface 114 is tilted upward. More specifically, the first clamping jaw 104 also includes a connecting body 113, the cover opening hook 106 is connected to the bottom end of the connecting body 113, and the end of the first abutting surface 114 away from the connecting body 113 is used to abut against the bottom surface of the cover 203, and the height of the first abutting surface 114 gradually increases from the end (left end) of the first abutting surface 114 close to the connecting body 113 to the end (right end) of the first abutting surface 114 away from the connecting body 113. The advantage of this setting is that the cover opening hook 106 can more easily hook the edge of the bottom surface of the cover 203, and the risk of the cover 203 falling off is low when the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203.

[0054] Reference Figure 3 In one embodiment, when the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203 together, the horizontal distance between the portion of the cover 203 abutted by the cover opening hook 106 and the connecting body 113 is smaller than the horizontal distance between the center of gravity 204 of the cover 203 and the connecting body 113. That is, the portion of the cover 203 abutted by the cover opening hook 106 is closer to the connecting body 113 than the center of gravity of the cover 203. Figure 3 For example, the portion of the cover 203 abutted by the cover opening hook 106 is arranged on the left side of the center of gravity of the cover 203. This arrangement is conducive to shortening the horizontal length of the cover opening hook 106 and reducing the shape complexity of the cover opening hook 106. In addition, this arrangement is also conducive to causing the cover 203 to rotate in a direction away from the connecting body 113 of the first clamping jaw 104 and fall, reducing the risk of the connecting body 113 hindering the cover 203 from falling, and increasing the success rate of the cover 203 falling in a preset direction.

[0055] Reference Figure 4 The second clamping jaw 105 includes a second abutting surface 116 , which is used to clamp the cover 203 together with the first clamping jaw 104 . The second abutting surface 116 is set to be a plane to reduce the shape complexity of the second clamping jaw 105 , thereby reducing the processing difficulty of the second clamping jaw 105 .

[0056] In one embodiment, the first clamping jaw 104 is configured to remain fixed while the driving mechanism 102 drives the second clamping jaw 105 to move from the second clamping position to the open position. Figure 3 and Figure 4"The first clamping jaw 104 remains fixed" can be understood as that the cover opening hook 106 remains in the first clamping position. Since the first clamping jaw 104 remains fixed, during the process of the first clamping jaw 104 and the second clamping jaw 105 opening each other, the cover opening hook 106 holding the bottom surface of the cover 203 will not move in the horizontal direction, and the cover 203 will not be driven by the cover opening hook 106 to produce horizontal movement. In this way, the position of the cover 203 before it falls is fixed, and the falling direction of the cover 203 will not be affected by its own horizontal movement. The controllability of the falling direction of the cover 203 and the accuracy of the falling position of the cover 203 are higher.

[0057] As described above, the second clamping claw 105 is used to abut against the outer surface of the cover 203 other than the bottom surface. Figure 3 In one embodiment, the second clamping jaw 105 is configured such that the second clamping jaw 105 abuts against the side of the cover 203 to cooperate with the first clamping jaw 104 to clamp the cover 203, and the movement of the second clamping jaw 105 from the second clamping position to the open position includes a movement component in the horizontal direction. During the movement from the second clamping position to the open position, the second clamping jaw 105 can move in the horizontal direction; or, referring to Figure 3 and Figure 4 , the second clamping jaw 105 can also rotate upward, and during the rotation of the second clamping jaw 105, the horizontal position of the part of the second clamping jaw 105 that abuts against the cover 203 will also change. Since the first clamping jaw 104 and the second clamping jaw 105 are both in contact with the side of the cover 203, when the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203, the cover 203 is not easy to move horizontally, and the position stability of the cover 203 is relatively high.

[0058] The second clamping claw 105 may not abut against the side of the cover 203. Figure 5 In another embodiment, the second clamping jaw 105 is configured such that the second clamping jaw 105 abuts against the top surface of the cover 203 to cooperate with the second clamping jaw 105 to clamp the cover 203, and the movement of the second clamping jaw 105 from the second clamping position to the open position includes a movement component in the vertical direction. Figure 5 As shown, when the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203 together, the part of the cover 203 abutted by the cover opening hook 106 is the first part 205, and the part of the cover 203 abutted by the second clamping jaw 105 is the second part 206. The first part 205 and the second part 206 are both arranged on the same side of the center of gravity, and the second part 206 is located on the side of the first part 205 away from the center of gravity. Figure 5 For example, the first portion 205 and the second portion 206 are both located on the left side of the center of gravity, and the second portion 206 is located on the left side of the first portion 205. Figure 6As shown, during the movement of the second clamping jaw 105 from the second clamping position to the open position, the second clamping jaw 105 may move vertically upward; in other embodiments, when the second clamping jaw 105 needs to move to the open position, the bottom end of the second clamping jaw 105 may also rotate upward. Based on the relative positions of the first portion 205 and the second portion 206, the lid 203 will not fall immediately after being separated from the container body 202, so as to prevent the lid 203 from falling before the lid receiving bucket 103 moves to the position where the lid 203 can be received. Specifically, with one end of the lid opening hook 106 used to abut the lid 203 as a fulcrum, the torque generated by the force applied by the second clamping jaw 105 to the second portion 206 and the torque generated by the gravity of the lid 203 can offset each other, and the lid 203 can be stably clamped by the first clamping jaw 104 and the second clamping jaw 105, and the lid 203 is not easy to fall before the first clamping jaw 104 and the second clamping jaw 105 open to each other.

[0059] In some embodiments, the cover opening mechanism 101 further includes a first blocking portion 107 and a second blocking portion 118 . Figure 7 107 and 118 are both connected to the first clamping jaw 104, and the matching relationship among the first clamping jaw 104, the second clamping jaw 105, the first blocking portion 107, the second blocking portion 118 and the cover 203 is shown. Figure 7 When the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203 together, there is a gap between the part of the cover 203 abutted by the cover opening hook 106 and the center of gravity 204 of the cover 203 along the first horizontal direction; the cover opening mechanism 101 also includes a first blocking portion 107 and a second blocking portion 118 distributed along the second horizontal direction, the first blocking portion 107 and the second blocking portion 118 are both connected to the first clamping jaw 104 (the first blocking portion 107 and / or the second blocking portion 118 can be connected to the side of the connecting body 113), the second direction and the first direction are perpendicular to each other, there is a gap between the first blocking portion 107 and the second blocking portion 118 for accommodating the cover 203, and the first blocking portion 107 is used to limit the cover 203 in the second direction. For example, referring to Figure 7 The first direction corresponds to the left-right direction, the second direction corresponds to the front-back direction, and the first blocking portion 107 is arranged in front of the second blocking portion 118; when the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203, the cover 203 is arranged in the gap, and the first blocking portion 107 and the second blocking portion 118 are both in contact with the side of the cover 203, the first blocking portion 107 prevents the cover 203 from moving forward, and the second blocking portion 118 prevents the cover 203 from moving backward.

[0060] In the case where the cover opening mechanism 101 includes the first blocking portion 107 and the second blocking portion 118, when the cover 203 is clamped by the first clamping jaw 104 and the second clamping jaw 105, the cover 203 is limited in both the first direction and the second direction, and the cover 203 is not easily offset. On the other hand, during the process of throwing the cover, the first blocking portion 107 and the second blocking portion 118 can prevent the cover 203 from rotating in the second direction, reducing the risk of the cover 203 rotating in directions other than the first direction, thereby improving the controllability of the falling direction of the cover 203 and the accuracy of the falling position.

[0061] In order to limit the cover 203 in the second direction, the first blocking portion 107 and the second blocking portion 118 can also be arranged at other positions, as long as the force applied by the first blocking portion 107 to the cover 203 has a non-zero component in the second direction, and the force applied by the second blocking portion 118 to the cover 203 has a non-zero component in the second direction. Figure 8 In another embodiment, the first blocking portion 107 and the second blocking portion 118 are both connected to the second clamping jaw 105. For another example, referring to Fig. 9 The first blocking portion 107 and the second blocking portion 118 are not connected to any of the clamping jaws. The first blocking portion 107 is separately provided with the first clamping jaw 104 and the second clamping jaw 105, respectively. The second blocking portion 118 is separately provided with the first clamping jaw 104 and the second clamping jaw 105, respectively. The first blocking portion 107 and the second blocking portion 118 can be connected to a bracket 110 of the sample analyzer. For another example, referring to Fig.10 In another embodiment, one of the first blocking portion 107 and the second blocking portion 118 is connected to the first clamping jaw 104 , and the other is connected to the second clamping jaw 105 .

[0062] Reference Figure 7 In the case where both the first blocking portion 107 and the second blocking portion 118 are connected to the first clamping jaw 104, the first blocking portion 107 and the second blocking portion 118 may also satisfy the following conditions: along the direction from the first clamping jaw 104 to the second clamping jaw 105 (corresponding to Figure 7In the direction from left to right in the figure), the distance between the first blocking portion 107 and the second blocking portion 118 in the second direction gradually increases, so that the first blocking portion 107 and the second blocking portion 118 abut the cover 203 along the first direction and cooperate with the second clamping claw 105 to clamp the cover 203. "The first blocking portion 107 and the second blocking portion 118 abut the cover 203 along the first direction" means that the force applied by the first blocking portion 107 to the cover 203 has a non-zero component in the first direction, and the force applied by the second blocking portion 118 to the cover 203 has a non-zero component 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, and the cover 203 is easier to enter and exit the gap, and the cover 203 is not easy to get stuck in the process of entering and exiting the gap. The first blocking portion 107 and the second blocking portion 118 abut the cover 203 along the first direction, so that the cover opening mechanism 101 can clamp the cover 203 more stably in the first direction. It should be noted that Figure 7 The first clamping jaw 104 does not directly contact the side of the cover 203. At this time, the clamping of the cover 203 by the first clamping jaw 104 and the second clamping jaw 105 can be understood as follows: the first clamping jaw 104 indirectly presses the side of the cover 203 through the first blocking portion 107 and the second blocking portion 118, thereby clamping the cover 203 along the horizontal direction (the horizontal direction is specifically the first direction) with the second clamping jaw 105.

[0063] Similarly, if Figure 8 As shown, when the first blocking portion 107 and the second blocking portion 118 are both connected to the second clamping jaw 105, the first blocking portion 107 and the second blocking portion 118 can also meet the following conditions: along the direction from the second clamping jaw 105 to the first clamping jaw 104 (corresponding to Figure 8 The distance between the first blocking portion 107 and the second blocking portion 118 in the second direction gradually increases, so that the first blocking portion 107 and the second blocking portion 118 abut against the cover 203 along the first direction and cooperate with the first clamping claw 104 to clamp the cover 203. This setting can improve the smoothness of the cover 203 when entering and exiting the gap, and at the same time enable the cover opening mechanism 101 to clamp the cover 203 more stably in the first direction. It should be noted that Figure 8 The second jaw 105 does not directly contact the side of the cover 203. At this time, the first jaw 104 and the second jaw 105 clamping the cover 203 can be understood as the second jaw 105 indirectly pressing the side of the cover 203 through the first blocking portion 107 and the second blocking portion 118, thereby clamping the cover 203 along the horizontal direction (the horizontal direction is specifically the first direction) with the first jaw 104.

[0064] The driving mechanism 102 will be introduced below.

[0065] In some embodiments, the driving mechanism 102 may include a lifting power source and an opening and closing power source. The opening and closing power source can drive the first jaw 104 and the second jaw 105 to close together, so that the first jaw 104 and the second jaw 105 clamp the cover 203; the opening and closing power source 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 release the cover 203. The lifting power source is used to lift the opening and closing power source, thereby driving the first jaw 104 and the second jaw 105 to lift. The opening and closing power source can be set to a cylinder, an oil cylinder, a linear motor, an electromagnet, etc., and the lifting power source can be set to a cylinder, an oil cylinder, a linear motor, a screw module, etc.

[0066] In other embodiments, in order to save the number of power sources and reduce the cost of the sample analyzer, the drive mechanism 102 may include only one lifting power source. Fig.11 As shown, the cover opening mechanism 101 also includes a connecting seat 108, the first clamping jaw 104 and the second clamping jaw 105 are both movably connected to the connecting seat 108, the connecting seat 108 is connected to a lifting power source, and the lifting power source is connected to the connecting seat 108 and drives the connecting seat 108 to rise and fall.

[0067] In the case where the driving mechanism 102 is only provided with a lifting power source, the first clamping jaw 104 and the second clamping jaw 105 can clamp the cover 203 by the gravity of the first clamping jaw 104 and the second clamping jaw 105. The first clamping jaw 104 and the second clamping jaw 105 are both rotatably connected to the connecting seat 108, and the cover opening hook 106 is configured to be maintained at the first clamping position under the gravity of the first clamping jaw 104, and the second clamping jaw 105 is maintained at the second clamping position under the gravity of the first clamping jaw 104. For example, the first clamping jaw 104 includes an upper clamping jaw section and a lower clamping jaw section, the upper clamping jaw section is located on the upper side of the rotation center of the first clamping jaw 104, the lower clamping jaw section is located on the lower side of the rotation center of the first clamping jaw 104, and the cover opening hook 106 is located at the lower clamping jaw section. When the first clamping jaw 104 is in the first clamping position, the first clamping jaw 104 is slightly tilted, the center of gravity of the upper clamping jaw section is located on the left side of the rotation center, the center of gravity of the lower clamping jaw section is located on the right side of the rotation center, the center of gravity of the upper clamping jaw section is located on the upper left side of the center of gravity of the lower clamping jaw section, and the torque generated by the gravity of the upper clamping jaw section is greater than the torque generated by the gravity of the lower clamping jaw section. In this way, the lower clamping jaw section will rotate upward and have a tendency to move to the right and approach the second clamping jaw 105, and the first clamping jaw 104 has a tendency to press against the cover 203, and the first clamping jaw 104 is maintained in the first clamping position under the action of its own gravity. The specific method for the second clamping jaw 105 to be maintained in the second clamping position under the action of its own gravity is similar to the above method, and will not be repeated here.

[0068] Alternatively, when the driving mechanism 102 is provided with only a lifting power source, the first clamping jaw 104 and the second clamping jaw 105 can clamp the cover 203 by the elastic force of the elastic member. Fig.12 In one embodiment, the cover opening mechanism 101 includes a first elastic member 111, and the two ends of the first elastic member 111 are respectively connected to the first clamping jaw 104 and the connecting 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 move closer to each other. The first elastic member 111 can be set as a tension spring. 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 to move closer to each other, so that the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203. For another example, referring to Fig.12 In one embodiment, the cover opening mechanism 101 includes a second elastic member 112, the two ends of the second elastic member 112 are respectively connected to the second clamping jaw 105 and the connecting seat 108, and the elastic force of the second elastic member 112 is used to drive the second clamping jaw 105 and the first clamping jaw 104 to move closer to each other. The second elastic member 112 can also be configured as a tension spring. 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 to move closer to each other, so that the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203. For another example, the cover opening mechanism 101 includes a third elastic member (not shown), the two ends of the third elastic member are respectively connected to the first clamping jaw 104 and the second clamping jaw 105, and the third elastic member can also be set as a tension spring. When the first clamping jaw 104 is in the first clamping position and the second clamping jaw 105 is in the second clamping position, the third elastic member is in a stretched state, and the third elastic member has a tendency to drive the first clamping jaw 104 and the second clamping jaw 105 to approach each other, so that the first clamping jaw 104 and the second clamping jaw 105 clamp the cover 203. In addition, it should be noted that 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.

[0069] The above mentioned how to make the first clamp 104 and the second clamp 105 clamp the cover 203 when the driving mechanism 102 is only provided with a lifting power source; the following describes how to open the first clamp 104 and the second clamp 105 when the driving mechanism 102 is only provided with a lifting power source.

[0070] When the second clamp 105 abuts against the side of the cover 203 , when the first clamp 104 and the second clamp 105 need to open and then clamp the cover 203 , the opening of the first clamp 104 and the second clamp 105 may be driven by the cover 203 of the sample container 201 .

[0071] like Figure 3 As shown, the cover opening hook 106 has a first guide surface 115, and the top end of the first guide surface 115 is connected to the end of the first abutting surface 114 for abutting the cover 203. The second clamping jaw 105 has a second guide surface 117, and the top end of the second guide surface 117 is connected to the bottom end of the second abutting surface 116. The first guide surface 115 and the second guide surface 117 are arranged obliquely. When the lifting power source drives the first clamping jaw 104 and the second clamping jaw 105 to descend, the first guide surface 115 and the second guide surface 117 will abut against the edge portion of the top surface of the cover 203; please refer to Figure 1 , Fig.11 and Fig.12 Since the first guide surface 115 and the second guide surface 117 are inclined, as the first clamping jaw 104 and the second clamping jaw 105 gradually descend, the cover 203 will push the first clamping jaw 104 and the second clamping jaw 105 to move horizontally, thereby driving the first clamping jaw 104 and the second clamping jaw 105 to open each other, so that the first clamping jaw 104 and the second clamping jaw 105 can descend to a position suitable for clamping the cover 203. Subsequently, the first clamping jaw 104 and the second clamping jaw 105 close and clamp the cover 203.

[0072] Reference Fig.12 The cover opening mechanism 101 further includes an upper limit member 109, which is fixedly connected to the connection seat 108, and the upper limit member 109 rises and falls synchronously with the connection seat 108, and the upper limit member 109 rises and falls synchronously with the first clamping jaw 104 and the second clamping jaw 105. The upper limit member 109 is arranged between the first clamping jaw 104 and the second clamping jaw 105. When the connection seat 108 is driven by the driving mechanism 102 to move downward to the abutting position, the bottom surface of the upper limit member 109 abuts against the top surface of the cover 203 to limit the connection seat 108 from moving downward, and at this time, the cover 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 limit member 109 can prevent the first clamping jaw 104 and the second clamping jaw 105 from being too low, thereby reducing the risk that the first clamping jaw 104 and the second clamping jaw 105 cannot accurately clamp the cover 203. After the connection seat 108 moves to the abutting position, the driving mechanism 102 drives the connection seat 108 to move upward, and the first clamping jaw 104 and the second clamping jaw 105 pull the cover 203 out of the top of the container body 202 .

[0073] In addition, refer to Fig.12 , the first elastic member 111 tends to drive the first clamping jaw 104 to move rightward. In order to keep the first clamping jaw 104 fixed during the process of ejecting the cover, when the cover opening hook 106 is in the first clamping position, the first elastic member 111 is in a stretched state, and the upper limit member 109 abuts against the first clamping jaw 104 (such as Figure 3As shown in FIG. 1 , the upper limit member 109 limits the first clamping jaw 104. In this way, the elastic force applied by the first elastic member 111 to the first clamping jaw 104 and the force applied by the upper limit member 109 to the first clamping jaw 104 are balanced with each other, so that the first clamping jaw 104 remains fixed during the cap throwing process.

[0074] Reference Fig.13 , the cover opening mechanism 101 also includes abutment 119, and the driving mechanism 102 and the abutment 119 are installed 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, thereby achieving the opening of the first jaw 104 and the second jaw 105. More specifically, the second jaw 105 is rotatably connected to the connecting seat 108. After the cover opening mechanism 101 pulls out the cover 203, the driving mechanism 102 drives the connecting seat 108 to continue to rise a certain distance until the top of the second jaw 105 abuts against the abutment 119; after the top of the second jaw 105 abuts against the abutment 119, as the connecting seat 108 continues to rise to Fig.13 In the position shown, the abutment member 119 pushes the top end of the second clamping jaw 105 to rotate, and the bottom end of the second clamping jaw 105 rotates upward and away from the cover 203 (the first clamping jaw 104 remains fixed during this process). In this way, the opening of the second clamping jaw 105 during the cover throwing process is achieved.

[0075] As the connection seat 108 rises, the cover receiving bucket 103 will gradually move to the bottom of the first clamping jaw 104. When the second clamping jaw 105 opens, the lid 203 falls into the cover receiving bucket 103. The cover receiving bucket 103 can be driven by another power source, or it can be connected to the cover opening mechanism 101 through some linkage mechanism. Under the action of the linkage mechanism, as the connection seat 108 rises, the cover receiving bucket 103 gradually moves to the bottom of the first clamping jaw 104. After the cover is thrown, the driving mechanism 102 drives the connection seat 108 to descend, so that the abutment member 119 is separated from the second clamping jaw 105, so that the second clamping jaw 105 is reset under the action of its own gravity or the elastic force of the second elastic member 112.

[0076] In one embodiment, the lifting power source may include a motor, a first pulley, a second pulley and a belt. The driving mechanism 102 also includes a bracket 110, on which a motor is mounted, the motor is connected to the first pulley and drives the first pulley to rotate, the second pulley is rotatably mounted on the bracket 110, the first pulley is arranged below the second pulley at an interval, and the belt is wound around the first pulley and the second pulley. The connecting seat 108 is fixedly connected to the belt, and the section of the belt used to connect to the connecting seat 108 is vertically arranged. When the motor drives the first pulley to rotate, the belt moves and drives the connecting seat 108 to rise and fall, thereby realizing the lifting and falling of the first clamping jaw 104 and the second clamping jaw 105.

[0077] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A sample analyzer, characterized in that: include: 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, characterized in that: The first jaw is configured to remain stationary during the process in which the drive mechanism drives the second jaw to move from the second clamping position to the open position.

3. The sample analyzer according to claim 1, characterized in that: The second clamping jaw is configured to abut against a side 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 a horizontal direction.

4. The sample analyzer according to claim 1, characterized in that: 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 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 along a first horizontal direction, and 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, and 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, characterized in that: The first clamping jaw 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 one 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, characterized in that: 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: include: 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.

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