Cover opening and closing mechanism and sample pretreatment equipment

Abstract

The invention discloses a cover opening and closing mechanism and sample pretreatment equipment, the cover opening and closing mechanism comprises a first cover opening assembly and a second cover opening assembly, the first cover opening assembly comprises a pressing unit and a cover opening unit, the pressing unit is used for limiting a container in a first direction, and the cover opening unit is used for opening the container in a second direction; the uncovering unit is used for being matched with the pressing unit to take down the first cover body on the container; and the second uncovering assembly is used for uncovering a second cover body on the container. The cover opening requirement of the container with the two layers of cover bodies can be met through the two stages of cover opening assemblies, the first cover opening assembly conducts cover opening after being pressed and limited, the second cover opening assembly can conduct cover opening action on the other layer of cover body on the container after the first cover opening assembly acts, and the cover opening requirement of the two layers of cover bodies on the single container is met.

Description

Technical Field

[0001] The invention relates to the technical field of sample detection, and in particular to a switch cover mechanism and sample pre-processing equipment. Background Art

[0002] During the process of sample packaging of liquid materials, it is necessary to take the liquid materials out of the container through a liquid taking mechanism, but the containers of liquid materials are all provided with a cover to prevent leakage of the materials during transportation. Therefore, the container of liquid materials needs to be opened before taking the liquid. Currently, the commonly used opening mechanism is to open the cover by rotation, or by clamping and then pulling out, which often causes irreversible damage to the cover. When the liquid material in a single container has not been used up, the cover cannot be snapped and installed on the container again. At the same time, for containers with a more complex cover structure, the current opening mechanism is also difficult to achieve smooth removal of the cover.

[0003] Therefore, how to meet the complex opening and closing requirements of liquid material containers is a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a cover opening and closing mechanism to meet the complex cover opening and closing requirements of liquid material containers.

[0005] Another object of the present invention is to provide a sample pre-processing device comprising the above-mentioned switch cover mechanism.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A cover opening and closing mechanism comprises a first cover opening assembly and a second cover opening assembly, wherein the first cover opening assembly comprises a clamping unit and a cover opening unit, wherein the clamping unit is used to limit a container in a first direction, and the cover opening unit is used to remove a first cover body on the container when the container is limited by the clamping unit; and the second cover opening assembly is used to complete opening of the second cover body of the container.

[0008] Preferably, in the above-mentioned opening and closing cover mechanism, the second cover opening assembly includes a clamping unit and a pressure rod unit, the pressure rod unit is slidably arranged in the first direction to apply a force to the center of the second cover body of the container, and drives the outer wall of the second cover body to expand to unlock the container, and the clamping unit is used to clamp and temporarily store the second cover body from the circumferential direction.

[0009] Preferably, in the above-mentioned switch cover mechanism, the second cover opening assembly also includes a push rod unit, the push rod unit and the pressure rod unit are spaced apart in the first direction, and the push rod unit is used to apply a force in the first direction to the second cover body in the opposite direction to the pressure rod unit to drive the outer wall of the second cover body to contract.

[0010] Preferably, in the above-mentioned switch cover mechanism, the push rod unit is fixedly arranged on the pressing unit, and the clamping unit drives the second cover body to contact the push rod unit.

[0011] Preferably, in the above-mentioned switch cover mechanism, the clamping unit includes a pair of clamping jaws, and the clamping jaws are retracted and expanded by a first driving unit. The clamping unit is provided with a visual sensor whose detection range covers the clamping jaws, and the visual sensor is communicatively connected with the first driving unit.

[0012] Preferably, in the above-mentioned switch cover mechanism, the clamping unit and the pressure rod unit are arranged at an interval, and position adjustment in the first direction is achieved through the same driving part.

[0013] Preferably, in the above-mentioned switch cover mechanism, the cover opening unit includes a plurality of load claws evenly arranged along the circumferential direction, and a second driving part transmission-connected to the load claws, the second driving part being used to drive the load claws to move toward and away from the center of the circle; each load claw is provided with a clamping claw floating on one side facing the center of the circle, the clamping claw being used to clamp and lock the first cover body in the first direction.

[0014] Preferably, in the above-mentioned switch cover mechanism, a limiting protrusion is provided on the end of the clamping claw in the first direction, and the clamping claw contacts the outer wall of the first cover body and is clamped between the first cover body and the container through the limiting protrusion.

[0015] Preferably, in the above-mentioned switch cover mechanism, a single load-bearing claw is provided with at least two elastic members at intervals in the first direction, and a single clamping claw is fixedly provided at an end of the elastic member.

[0016] Preferably, in the above-mentioned switch cover mechanism, the clamping unit includes a pressure plate and a third driving part, the third driving part is used to drive the pressure plate to move along the first direction, a through hole larger than the first cover body is provided in the middle area of ​​the pressure plate, and the pressure plate abuts and presses the container along the circumferential outer side of the first cover body.

[0017] Preferably, in the above-mentioned cover opening and closing mechanism, a transfer assembly is further included, wherein the transfer assembly includes a support portion for carrying the container, and a fourth drive portion transmission-connected to the support portion; the fourth drive portion is used to drive the support portion to switch between the first station and the second station;

[0018] The first cover opening assembly opens the first cover of the container at the first station, and the second cover opening assembly opens the second cover of the container at the second station. The first station and the second station are arranged along a second direction, and the second direction is perpendicular to the first direction.

[0019] A sample pre-processing device comprises the switch cover mechanism provided by any one of the above embodiments.

[0020] It can be seen from the above technical scheme that the switch cover mechanism provided by the present invention can open the container with a single-layer or double-layer cover body through the first cover opening component and the second cover opening component; specifically, the first cover opening component locks the container by pressing and limiting, and realizes the opening of the cover through the cover opening unit, which is suitable for the first cover body with greater rigidity; and the second cover opening component can have the same structure as the first cover opening component, so as to open the cover body with two layers of similar structure, and similarly, the second cover opening component can also be adapted to different second cover bodies for structural design, so as to open the cover body located in the inner layer of the first cover body. When the switch cover mechanism of the double-layer cover opening component has different structures of the two-layer cover opening components, it can smoothly open the container with a double-layer cover body, and can also adapt to two single-layer cover body containers with different cover body structures; and when the two-layer cover opening components have the same structure, it can simultaneously operate the opening of two single-layer cover body containers, thereby improving the opening efficiency of the switch cover mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a switch cover mechanism provided by an embodiment of the present invention;

[0023] Figure 2 is a structural schematic diagram of a second cover opening assembly;

[0024] Figure 3 is a structural schematic diagram of a first cover opening assembly;

[0025] Figure 4 For Figure 3 A schematic diagram of the cross-sectional structure of the center opening cover unit;

[0026] Figure 5 A schematic diagram of the structure of a sample pretreatment device provided in an embodiment of the present invention.

[0027] Among them, 10-first cover opening component; 110-pressing unit; 1110-pressing plate; 1120-through hole; 120-cover opening unit; 1210-carrying claw; 1220-holding claw; 1230-limiting protrusion; 1240-elastic member; 20-second cover opening component; 210-clamping unit; 2110-clamping claw; 2120-visual sensor; 220-pressure rod unit; 30-storage component; 40-transport component; 410-support part; 420-baffle; 50-container; 510-first cover body; 520-second cover body; 100-opening and closing cover mechanism. DETAILED DESCRIPTION

[0028] The core of the present invention is to disclose a cover opening and closing mechanism to meet the complex cover opening and closing requirements of liquid material containers.

[0029] Another object of the present invention is to disclose a sample pre-processing device comprising the above-mentioned switch cover mechanism.

[0030] In order to make the technical personnel in this field better understand the scheme of the present invention, the embodiments of the present invention are described below with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the content of the invention recorded in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary for the solutions of the invention recorded in the claims.

[0031] like Figure 1 As shown, the lid opening and closing mechanism provided by the embodiment of the present invention mainly includes a first lid opening component 10 and a second lid opening component 20. In one embodiment, the first lid opening component 10 and the second lid opening component 20 can be arranged on the same support structure to realize synchronous driving, and realize independent action process of the container 50 through the spaced structure, and they can also be arranged on different support structures to realize independent transfer action.

[0032] The first cover opening assembly 10 is used to open the first cover 510 of the container 50, and mainly includes a pressing unit 110 and a cover opening unit 120. The pressing unit 110 and the cover opening unit 120 cooperate to realize the removal of the first cover 510 in the first direction. Specifically, the pressing unit 110 is used to limit the container 50 in the first direction. Here, the first direction is the height direction of the container 50 in the placed state. When the container 50 is kept in a horizontally placed state, the first direction is the vertical direction. Since the first cover opening assembly 10 needs to remove the first cover 510 in the first direction, the container 50 is limited in the first direction by the pressing unit 110; the pressing unit 110 can be used by a plate or a rod that is extended to abut against the top wall of the container 50 in the first direction to realize the pressing of the container 50, and prevent the container 50 from moving along the first direction when the cover opening unit 120 clamps and removes the first cover 510.

[0033] The cover opening unit 120 is used to remove the first cover body 510 on the container 50 in the first direction. Here, the cover opening unit 120 can clamp the first cover body 510 and then remove the first cover body 510 by screwing, or can clamp the first cover body 510 and then remove the first cover body 510 by pulling it up. At the same time, the first cover body 510 can also adopt a combination of the two structures, that is, it can perform a rotating cover opening action, and can also perform a clamping cover opening action. It should be noted that since the first cover body 510 is mostly a protective cover body with higher rigidity on the container 50, the first opening cover assembly 10 can open the cover by a destructive opening method, through the clamping limit of the clamping unit 110 and the clamping and removal of the opening cover unit 120. For the pull-out type cover body structure, it can be clamped by the opening cover unit 120, and the opening cover assembly can be driven along the first direction by the driving component on the first opening cover assembly 10 to directly pull the first cover body 510; for the screw-type cover body structure, the driving component needs to be rotatably connected to the opening cover unit 120, so that after the opening cover unit 120 is locked and matched with the first cover body 510, the first cover body 510 can be removed by the rotational driving action of the driving component.

[0034] It should be noted that, in some embodiments of the present invention, the driving component can simultaneously set two driving forms of the opening cover unit 120, namely, linear motion along the first direction, and rotational drive with the axis of the first cover body 510 as the rotation center, and different opening methods are adopted according to different structural forms of the first cover body 510.

[0035] The second lid opening component 20 is used to open the second cover body 520 of the container 50, so as to cooperate with the first lid opening component 10 to complete the lid opening; the second lid opening component 20 can have the same structure as the first lid opening component 10 to open the first cover body 510 and the second cover body 520 with similar structures, or to simultaneously operate the container 50 with a single cover body to improve the opening efficiency of the opening and closing cover mechanism; and the second lid opening component 20 can also have a different structure from the first lid opening component 10, so as to open the cover for a single container with two different cover body structures. In some embodiments of the present invention, the second opening cover assembly 20 mainly includes a clamping unit 210 and a pressure rod unit 220 to open the second cover body 520 having a circumferential slit structure. Specifically, the pressure rod unit 220 is transmission-connected to a driving component such as a motor or a cylinder to achieve sliding in a first direction, and the transport component of the second opening cover assembly 20 can move the pressure rod unit 220 to directly above the second cover body 520 in the first direction. The position adjustment of the pressure rod unit 220 in the first direction can apply a force from the top of the second cover body 520 to the center position of the second cover body 520, so that the outer wall of the second cover body 520 expands, thereby achieving unlocking of the second cover body 520 and the container 50. After the pressure rod unit 220 completes the unlocking action of the second cover body 520, the clamping unit 210 can clamp the second cover body 520 from the circumference, and complete the opening action of the second cover body 520 under the transport action of the clamping unit 210.

[0036] It should be noted that when the second cover 520 is removed, the clamping unit 210 only applies the clamping force required for transportation to the second cover 520, and after removing the second cover 520, leaves the opening area of ​​the container 50 to temporarily store the second cover 520; and when there is still liquid material in the container 50 and the sample packaging is completed, the clamping unit 210 is able to drive the second cover 520 to return to the opening position of the container 50 to reset the second cover 520.

[0037] The switch cover mechanism provided in the above embodiment can realize the opening of two different structures of cover bodies by setting the first cover opening component 10 and the second cover opening component 20. For the cover body with fixed buckle setting, the first cover opening component 10 can be used to press and limit, and the cover can be opened by clamping and opening; for the cover body with peripheral contraction buckle, the second cover opening component 20 can be used to apply force to the center to drive the outer wall to deform, so as to realize opening, and clamping can be realized by the clamping unit 210; thus, the switch cover mechanism can open the cover of the container 50 with one or two of the two cover bodies, thereby improving the versatility of the switch cover mechanism. At the same time, for the recoverable deformation structure of the second cover body 520, the clamping unit 210 of the second cover opening component 20 in the embodiment of the present invention can realize temporary storage. When the container 50 needs to close the cover and suspend the operation, the clamping unit 210 can also drive the second cover body 520 to move to the opening area of ​​the container 50 to close the cover of the container 50, so as to meet the closing requirements of the container 50 during use.

[0038] On the basis of the above-mentioned embodiment, when the second cover 520 needs to be closed, since the second cover 520 is unlocked from the container 50 by the expansion and deformation of the outer wall, it is necessary to apply a driving force to the outer wall of the second cover 520 to deform toward the middle area. In some embodiments of the present invention, the clamping unit 210 of the second cover opening assembly 20, on the basis of contracting toward the center to clamp the second cover 520, also has a driving gear that further contracts toward the center. When the clamping unit 210 clamps and temporarily stores the second cover 520, if the second cover 520 needs to be closed, the clamping unit 210 further contracts toward the center to apply a force toward the center from the circumferential outer wall of the second cover 520 to the second cover 520, and drives the outer wall of the second cover 520 to contract to a state where it can be docked and locked with the opening of the container 50, and the clamping unit 210 then drives the second cover 520 to buckle with the opening of the container 50. It should be noted that, in the above-mentioned closing process, the clamping unit 210 can also first put the second cover body 520 on the opening position of the container 50, and then drive the outer wall of the second cover body 520 to shrink and directly lock with the container 50 by further contracting toward the center, which can smoothly realize the closing action of the second cover body 520 on the container 50.

[0039] In order to avoid the risk of irregular deformation of the second cover body 520 when the clamping unit 210 drives the outer wall of the second cover body 520, in some embodiments of the present invention, the second opening cover assembly 20 also includes a push rod unit, and the push rod unit and the pressure rod unit 220 are spaced apart and arranged opposite to each other in the first direction. The opposite arrangement here means that the push rod unit and the pressure rod unit 220 are located on both sides of the second cover body 520 in the first direction. Correspondingly, when the second cover body 520 is expanded and deformed by the action of the pressure rod unit 220, when it is necessary to close the cover, the push rod unit is actuated, or the clamping unit 210 drives the second cover body 520 to move, so that the push rod unit contacts and acts on the central area of ​​the second cover body 520. The push rod unit and the pressure rod unit 220 are arranged on opposite sides of the second cover body 520, so that the push rod unit can apply a force to the second cover body 520 in a first direction that is opposite to the action direction of the pressure rod unit 220, thereby causing the outer wall of the second cover body 520 to shrink toward the center under the action of the push rod unit, and return to its original state and be able to dock and lock with the opening of the container 50. It should be noted that the push rod unit applies force to the second cover body 520 from the center, which can make the outer wall of the second cover body 520 produce more regular deformation, and the push rod unit and the pressure rod unit 220 are structures that apply force from the same area on both sides of the second cover body 520. When a certain irregular deformation occurs, it can also offset the effect and make the second cover body 520 meet a more regular closed state.

[0040] Further, on the basis of the above embodiment, in order to reduce the structural complexity of the switch cover mechanism, the push rod unit is preferably fixedly arranged, which can be a rod structure with a protruding arrangement, and the second cover body 520 is deformed by the action of the clamping unit 210 driving the second cover body 520. It should be noted that since the clamping unit 210 itself is a moving part, it can be driven by the driving structure to drive the second cover body 520 to move toward the push rod unit, without the need to design the push rod unit as a moving part to increase the need for interference adjustment, thereby reducing the complexity of the structure. Since the pressing unit 110 has a certain height and is a stable bearing platform, the push rod unit is fixedly arranged on the pressing unit 110 to reduce the stroke of the clamping unit 210 carrying the second cover body 520 in the contact force process with the push rod unit, and reduce the material consumption in the process of setting the push rod unit structure.

[0041] In addition, it should be noted that Figure 1 and Figure 2As shown, in some embodiments of the present invention, the clamping unit 210 includes a pair of clamping jaws 2110, which are symmetrically arranged and contracted and expanded by a first driving unit to change the distance between the two clamping jaws 2110, so as to meet the clamping and loosening actions of the clamping unit 210 on the second cover 520 and meet the requirements of opening and closing the second cover 520. It should also be noted that in order to avoid the influence of the second cover 520 on the subsequent liquid extraction process, a visual sensor 2120 is also provided on the clamping unit 210, and the detection range of the visual sensor 2120 covers the clamping jaws 2110, and the visual sensor 2120 is connected in communication with the driving component of the clamping unit 210 to adjust the action of the driving component through information feedback. During the process of opening the second cover body 520, the clamping unit 210 contacts the second cover body 520 and clamps the second cover body 520 through the driving action of the first driving unit. At the same time, the visual sensor 2120 detects the existence of the second cover body 520 between the clamping jaws 2110, and then it will feedback the driving component of the clamping unit 210 to continue to move, and drive the second cover body 520 to leave the opening area of ​​the container 50. Once the visual sensor 2120 detects that there is no second cover body 520 between the clamping jaws 2110, it means that the opening process of the second cover body 520 has failed. Then the visual sensor 2120 feedbacks the driving component of the clamping unit 210 to stop moving, and prompts the operator to retry the opening action of the second cover body 520 through sound and light signals, or shut down for maintenance, so as to avoid failure of the subsequent liquid extraction process.

[0042] Furthermore, in the cover opening and closing mechanism provided in the embodiment of the present invention, the clamping unit 210 and the pressure rod unit 220 are arranged at intervals to avoid interference between the opening process and the clamping process of the second cover body 520, and it should be noted that the clamping unit 210 and the pressure rod unit 220 can be arranged independently to achieve driving through different driving parts, and the clamping unit 210 and the pressure rod unit 220 can also be arranged as an integrated structure, that is, both are arranged on the same support and achieve position adjustment through the same driving part. When one of the clamping unit 210 and the pressure rod unit 220 moves, the other follows the movement and avoids motion interference through the structure arranged at intervals.

[0043] Further, for the switch cover mechanism provided in the embodiment of the present invention, Figure 1 and Figure 3As shown, in the first cover opening assembly 10 for realizing the cover opening action of the first cover body 510, the cover opening unit 120 includes a plurality of bearing claws 1210, and the bearing claws 1210 are evenly arranged along the circumferential direction. It should be noted that three or more bearing claws 1210 are preferably arranged to reduce the risk of deflection of the first cover body 510 during the action of the cover opening unit 120. The bearing claws 1210 are transmission-connected to the second driving part, so that the bearing claws 1210 can move toward and away from the center of the circle through the second driving part, that is, the contraction and expansion of the clamping area between the bearing claws 1210 can be realized through the second driving part.

[0044] The cover opening unit 120 can clamp the first cover 510 through the structure of the second driving part and the bearing claw 1210. However, for the annular first cover 510 structure, the bearing claw 1210 may slip during the cover opening process due to the difference in centering, small clamping force, and the overly firm connection between the first cover 510 and the container 50. Therefore, on the basis of the above embodiment, each bearing claw 1210 is also provided with a clamping claw 1220 on the side facing the center of the circle, and the cover opening unit 120 locks the first cover 510 through the clamping claw 1220. It should be noted that the clamping claws 1220 and the load-bearing claws 1210 are arranged in a one-to-one correspondence, and the floating clamping claws 1220 can have a certain deformation range in the radial direction of the clamping structure. On this basis, when the cover opening unit 120 is clamping the first cover body 510, if there is a certain difference in the degree of centering, the floating clamping claws 1220 can compensate for the error. Specifically, the clamping claws 1220 closer to the edge of the first cover body 510 float to a position closer to the corresponding load-bearing claws 1210, and the clamping claws 1220 farther away from the edge of the first cover body 510 float to a position farther away from the corresponding load-bearing claws 1210. It only needs to use the second driving unit to make the floating structure of each clamping claw 1220 in a compressed state. Under the condition that there is a centering error between the cover opening unit 120 and the first cover body 510, the structure of the clamping claws 1220 can still be used to achieve adhesion and clamping with the outer wall of the first cover body 510.

[0045] Considering that the first cover body 510 as an outer cover structure generally has a higher strength and a tighter connection effect, in some embodiments of the present invention, such as Figure 3 and Figure 4As shown, the clamping claw 1220 is further provided with a limiting protrusion 1230 on its inner wall surface facing the center of the circle, so that the limiting protrusion 1230 abuts against the first cover 510 to limit the position, thereby improving the stability of the first cover 510 during the pulling process. Preferably, the limiting protrusion 1230 is provided at one end of the clamping claw 1220 in the first direction, and when the clamping claw 1220 contacts the outer wall of the first cover 510, the limiting protrusion 1230 is inserted between the first cover 510 and the main structure of the container 50. Here, when the cover opening unit 120 is lifted in the first direction to pull the first cover 510, the friction effect of the inner wall of the clamping claw 1220 under the clamping force and the abutting limiting effect of the circumferential limiting protrusion 1230 on the edge of the first cover 510 can improve the pulling force of the cover opening unit 120 on the first cover 510 in the first direction, thereby improving the stability of the first cover 510 during the opening process.

[0046] It should also be noted that the floating setting can be achieved by an elastic member 1240 such as a spring, and in order to enhance the stability of the floating structure, it is preferred that a single load-bearing claw 1210 is provided with at least two elastic members 1240 spaced apart in the first direction, so as to enhance the stability of the floating process by means of two-point auxiliary action. At the same time, in order to avoid the influence of the elastic member 1240 on the structure of the cover opening unit 120, it is preferred that the clamping claw 1220 is provided at the end position of the elastic member 1240, and the other end of the elastic member 1240 is provided on the inner wall of the load-bearing claw 1210, or is provided through the load-bearing claw 1210; it is only necessary to ensure that there is no protruding mechanism on the inner wall of the clamping claw 1220 to affect its clamping effect on the first cover body 510.

[0047] Furthermore, in the switch cover mechanism provided in the embodiment of the present invention, the clamping unit 110 is an important component for achieving the stability of the container 50 during the opening process of the first cover body 510, and specifically includes a pressing plate 1110 and a third driving unit, and the third driving unit is used to drive the pressing plate 1110 to move in the first direction, so that the container 50 can be placed directly under the pressing plate 1110 after the pressing plate 1110 is lifted, or the pressing plate 1110 can be transferred directly above the container 50 without interfering with the container 50; at the same time, after the pressing plate 1110 is located directly above the container 50, the third driving unit drives the pressing plate 1110 to descend in the first direction to contact with the top wall surface of the container 50 to limit the lifting movement of the container 50 in the first direction, thereby avoiding the risk of shaking or moving of the container 50 when the first cover body 510 is lifted in the first direction.

[0048] The pressing plate 1110 may be a split structure and limit the container 50 from multiple areas of the top wall of the container 50, and the pressing plate 1110 may also be an integral plate structure. In some embodiments of the present invention, a through hole 1120 is provided in the middle area of ​​the pressing plate 1110, and the size of the through hole 1120 is larger than the size of the first cover 510 to allow the first cover 510 to pass through the through hole 1120. On this basis, when the pressing plate 1110 presses the container 50, the through hole 1120 is aligned with the first cover 510, and under the driving action of the third driving unit, the pressing plate 1110 abuts against and presses the container 50 along the circumferential outer side of the first cover 510, which can apply a stable pressing force on the circumference of the first cover 510 when the first cover 510 is opened to improve the stability of the container 50.

[0049] In addition, it should be noted that since the first cover body 510 is mostly a disposable structure, and the first cover body 510 may be at risk of destructive deformation when the first cover opening assembly 10 opens the rigid first cover body 510, in some embodiments of the present invention, the cover opening and closing mechanism further includes a storage assembly 30 for collecting the first cover body 510, and the storage assembly 30 is a cavity storage structure with an opening at the top, and the movement position of the cover opening unit 120 includes directly above the storage assembly 30. After the cover opening unit 120 completes the removal of a single first cover body 510, the cover opening unit 120 is driven by the transfer mechanism of the first cover opening assembly 10 to move to directly above the storage assembly 30, and then the second driving unit drives the bearing claw 1210 to move away from the center of the circle to release the first cover body 510, so that the cover opening unit 120 can cyclically open the first cover bodies 510 of multiple containers 50.

[0050] At the same time, in the above embodiment, the driving part used for structural driving can be a commonly used power component such as a motor and a cylinder; at the same time, sensors can also be set for detection for the position where the movement needs to be confirmed to be in place, and the area where there is movement interference. When there is a problem with the container 50 or the structural part being in place, or a problem with the interference of the moving parts, the sensor feedback controller stops the action of the opening and closing cover mechanism and prompts the operator to perform maintenance. The driving method and the sensing method are commonly used technical means by technical personnel in this field and will not be repeated here.

[0051] In order to further optimize the above technical solution, in some embodiments of the present invention, the cover opening and closing mechanism further includes a transfer assembly 40. Specifically, the transfer assembly 40 includes a support portion 410 and a fourth drive portion, wherein the support portion 410 is used to carry the container 50, and is slidably arranged on the support structure, and realizes sliding motion through the fourth drive portion. The slidably arranged support portion 410 can cooperate with the feeding mechanism of the container 50 by setting a sliding path, that is, the support portion 410 can slide to a position where the feeding mechanism is convenient for unloading, and carry the container 50, and then rotate to the operating position of the cover opening and closing mechanism by sliding to open the container 50. It can optimize the workflow, and keep sufficient design spacing between different structures, reducing the design difficulty.

[0052] In order to facilitate the execution of the cover opening process, the fourth driving part is used to drive the support part 410 to switch between the first station and the second station, wherein the interval between the first station and the second station can be set according to the needs to ensure that there is no interference problem when the cover opening structures on the two stations are in motion. Correspondingly, the first cover opening component 10 can open the first cover body 510 of the container 50 at the first station, and the second cover opening component 20 can open the second cover body 520 of the container 50 at the second station, and the two cover opening components will not affect each other. On the basis of the above structure, the second station can be extended to serve as the unloading station of the feeding mechanism for the container 50. At this time, the feeding mechanism first unloads the container 50 from the second station, and the support part 410 is first located at the second station and carries the container 50, and the fourth driving part drives the support part 410 to move to the first station, and the first cover body 510 on the container 50 is opened by the first opening component 10; after the first cover body 510 is opened, the fourth driving part drives the support part 410 to move to the second station, and the second cover body 520 on the container 50 is opened and temporarily stored by the second opening component 20. The container 50 with the opened cover can be transferred to a position suitable for liquid extraction through the support part 410 under the drive of the fourth driving part, or liquid can be extracted at the second station; and when it is necessary to close the cover of the opened container 50, the container 50 is adjusted to be located at the second station, and the second opening component 20 is used to close the cover of the second cover body 520 on the container 50.

[0053] It should be noted that, preferably, the first workstation and the second workstation are arranged along the second direction to reduce the difficulty of driving the support part 410 by the fourth driving part through sliding in a single direction, and preferably, the second direction is perpendicular to the first direction, that is, the first direction is along the vertical direction and the second direction is set along the horizontal direction.

[0054] Furthermore, in order to prevent the container 50 from shaking and tipping over during transportation through the support portion 410, the transport assembly 40 also includes a baffle 420. The baffle 420 can be arranged in pairs to abut against the opposite side outer walls of the container 50 in the second direction to maintain the stability of the container 50 during movement.

[0055] Furthermore, if Figure 5 As shown, an embodiment of the present invention further provides a sample pretreatment device, which includes the cover opening and closing mechanism 100 provided in any of the above embodiments, so as to open the cover of the supplied container 50, and perform the cover closing action when the cover needs to be closed, and at the same time, the container 50 after the cover is opened can be transported to the liquid collection position, so that the liquid collection component can absorb the material in the container 50. Since the cover opening and closing mechanism 100 has the technical effects of the cover opening and closing mechanism 100 provided in any of the above embodiments, the sample pretreatment device also has the above technical effects, which will not be repeated herein.

[0056] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0057] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. The scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but also should cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A switch cover mechanism, characterized in that: The invention comprises a first cover opening component (10) and a second cover opening component (20), wherein the first cover opening component (10) comprises a pressing unit (110) and a cover opening unit (120), wherein the pressing unit (110) is used to limit a container (50) in a first direction, and the cover opening unit (120) is used to remove a first cover body (510) on the container (50) when the container (50) is limited by the pressing unit (110); and the second cover opening component (20) is used to complete the opening of the second cover body (520) of the container (50).

2. The cover opening and closing mechanism according to claim 1, characterized in that: The second cover opening assembly (20) comprises a clamping unit (210) and a pressure rod unit (220), wherein the pressure rod unit (220) is slidably arranged in the first direction to apply a force to the center of the second cover body (520) of the container (50) and drive the outer wall of the second cover body (520) to expand so as to unlock the container (50), and the clamping unit (210) is used to clamp the second cover body (520) from the circumferential direction.

3. The cover opening and closing mechanism according to claim 2, characterized in that: The second cover opening assembly (20) further comprises a push rod unit, the push rod unit and the pressure rod unit (220) being arranged at an interval in the first direction, and the push rod unit being used to apply a force in the first direction to the second cover body (520) in a direction opposite to that of the pressure rod unit (220) to drive the outer wall of the second cover body (520) to contract.

4. The switch cover mechanism according to claim 3, characterized in that: The push rod unit is fixedly arranged on the pressing unit (110), and the clamping unit (210) drives the second cover body (520) to contact the push rod unit.

5. The cover opening and closing mechanism according to claim 2, characterized in that: The clamping unit (210) comprises a pair of clamping jaws (2110), wherein the clamping jaws (2110) are retracted and expanded by a first driving unit, and a visual sensor (2120) having a detection range covering the clamping jaws (2110) is provided on the clamping unit (210), and the visual sensor (2120) is communicatively connected with a driving component of the clamping unit (210).

6. The cover opening and closing mechanism according to claim 3, characterized in that: The clamping unit (210) and the pressure rod unit (220) are arranged at intervals, and position adjustment is achieved through the same driving unit.

7. The cover opening and closing mechanism according to claim 1, characterized in that: The cover opening unit (120) comprises a plurality of load-bearing claws (1210) uniformly arranged along the circumferential direction, and a second driving part drivingly connected to the load-bearing claws (1210), the second driving part being used to drive the load-bearing claws (1210) to move toward and away from the center of a circle; each load-bearing claw (1210) is provided with a clamping claw (1220) floatingly arranged on one side facing the center of the circle, the clamping claw (1220) being used to clamp and lock the first cover body (510) in the first direction.

8. The cover opening and closing mechanism according to claim 7, characterized in that: The clamping claw (1220) is provided with a limiting protrusion (1230) at the end in the first direction, and the clamping claw (1220) contacts the outer wall of the first cover body (510) and is clamped between the first cover body (510) and the container (50) through the limiting protrusion (1230).

9. The cover opening and closing mechanism according to claim 7, characterized in that: A single load-bearing claw (1210) is provided with at least two elastic members (1240) spaced apart in the first direction, and a single clamping claw (1220) is fixedly provided at an end of the elastic member (1240).

10. The cover opening and closing mechanism according to claim 1, characterized in that: The pressing unit (110) comprises a pressing plate (1110) and a third driving part, wherein the third driving part is used to drive the pressing plate (1110) to move along the first direction, a through hole (1120) having a size larger than that of the first cover body (510) is provided in the middle area of ​​the pressing plate (1110), and the pressing plate (1110) abuts against and presses the container (50) along the circumferential outer side of the first cover body (510).

11. The cover opening and closing mechanism according to claim 1, characterized in that: It also includes a transfer assembly (40), the transfer assembly (40) including a support portion (410) for carrying the container (50), and a fourth drive portion drivingly connected to the support portion (410); the fourth drive portion is used to drive the support portion (410) to switch between the first workstation and the second workstation; The first cover opening component (10) performs an opening action of a first cover body (510) on the container (50) at the first station, and the second cover opening component (20) performs an opening action of a second cover body (520) on the container (50) at the second station, the first station and the second station are arranged along a second direction, and the second direction is perpendicular to the first direction.

12. A sample pretreatment device, characterized in that: It comprises the switch cover mechanism (100) according to any one of claims 1 to 11.

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