Oscillating structure and pipetting equipment

Abstract

The utility model provides an oscillation structure and pipetting equipment. The oscillation structure comprises an oscillation working bracket, the oscillation motor assembly comprises a stepping motor and a coupling assembly, and the stepping motor is installed on the oscillation working support; the stepping motor penetrates through the output end of the oscillation working support and is eccentrically arranged with the eccentric wheel assembly, and the stepping motor and the eccentric wheel assembly are connected to the coupling assembly. The vibration tray is connected to the eccentric wheel assembly, and the eccentric wheel assembly can rotate relative to the vibration tray; the XY-direction oscillation guide assembly is arranged between the oscillation working bracket and the oscillation tray; the reset assembly comprises a first fixing piece, a reset spring and a crank connecting rod piece, and the first fixing piece is arranged on the oscillation working support or at the bottom of the oscillation tray; the crank connecting rod piece is connected to the coupling assembly and can rotate relative to the coupling assembly; one end of the reset spring is connected to the crank connecting rod piece, and the other end is connected to the first fixing piece.

Description

Technical Field

[0001] The utility model belongs to the technical field, and in particular relates to an oscillating structure and a liquid transfer device. Background Art

[0002] Fluorescence quantitative PCR is a method that adds fluorescent chemicals to the DNA amplification reaction and measures the total amount of products after the labeled DNA amplification cycle. Before the sample in the fluorescence quantitative PCR instrument is tested, the mixture of sample and reagent needs to be shaken to mix evenly.

[0003] The driving force of the existing oscillation structure is provided by a motor, the output end of the motor is eccentrically connected to the test consumables (test consumables include PCR plates, fragment analyzer plates, ELISA plates, deep-well plates, test tube racks and test tubes on the test tube racks, etc.), and the motor drives the test consumables to rotate, and the test consumables move in the horizontal plane, thereby oscillating the mixture in the test tube. In this structure, the test personnel are often required to place the test tubes containing the mixture on the specific test consumables in the oscillation structure in turn. The oscillation structure can only start working after all the test tubes are placed. During the process of placing the test tubes, the oscillation structure suspends work, and the working efficiency of this structure is low.

[0004] In addition, in the above-mentioned oscillation structure, the motor cannot reset to the origin when driving the test consumables to rotate. During the automated testing process, the automated system cannot confirm the exact position of the test consumables, thereby failing to realize automated operation. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an oscillating structure for oscillating the mixed liquid in the test tube placed thereon, the test consumables on the oscillating structure and the oscillating structure can be quickly disassembled, and the test tube can be placed on the test consumables to be oscillated while the oscillating structure is working, so as to improve the working efficiency and further reduce the production cost.

[0006] Another object of the utility model is to provide a liquid transfer device, in which the oscillating structure is used to automatically take and place the test consumables on the oscillating structure as a whole, thereby increasing the work efficiency and reducing the labor cost.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] An oscillating structure, comprising:

[0009] Oscillating work stand;

[0010] An oscillating motor assembly and an eccentric wheel assembly, wherein the oscillating motor assembly comprises a stepping motor and a coupling assembly, and the stepping motor is mounted on the oscillating working bracket;

[0011] The stepper motor passes through the output end of the oscillating working support and the eccentric wheel assembly, and is eccentrically arranged, and both are connected to the coupling assembly;

[0012] An oscillating tray, which is connected to the eccentric wheel assembly, and the eccentric wheel assembly can rotate relative to the oscillating tray, and a detachable test consumable is placed on the oscillating tray;

[0013] An XY-direction oscillation guide assembly is disposed between the oscillation working support and the oscillation tray, the XY-direction oscillation guide assembly is located on one side of the eccentric wheel assembly, and the XY-direction oscillation guide assembly limits the oscillation tray to move in the X-direction and the Y-direction in the horizontal plane;

[0014] A reset assembly, comprising a first fixing member, a reset spring, and a crank connecting rod member, wherein the first fixing member is arranged on the oscillating working support or on the bottom of the oscillating tray;

[0015] A crank connecting rod member connected to the coupling assembly and capable of rotating relative to the coupling assembly, wherein the rotation center of the crank connecting rod member is not coaxial with the stepping motor and / or the coupling assembly;

[0016] One end of the return spring is connected to the crank connecting rod member, and the other end is connected to the first fixing member.

[0017] Preferably, an eccentric wheel mounting groove is provided at the bottom of the vibration tray, and a gap between the eccentric wheel assembly and the eccentric wheel mounting groove ranges from 0.1 mm to 0.2 mm.

[0018] Preferably, the coupling assembly comprises: a first coupling member and a second coupling member arranged in parallel up and down, and a connecting shaft, one end of the connecting shaft is connected to the first coupling member, and the other end is connected to the second coupling member;

[0019] The crank connecting rod is arranged between the first coupling member and the second coupling member, and is sleeved on the connecting shaft;

[0020] The first coupling is connected to the output shaft of the stepper motor, and the second coupling is connected to the eccentric wheel assembly.

[0021] Preferably, the crank-connecting rod member comprises a sleeve and a crank connected to the sleeve, the sleeve is sleeved on the connecting shaft and can rotate relative to the connecting shaft, and one end of the return spring is connected to the crank.

[0022] Preferably, the XY-direction oscillation guide assembly comprises an X-direction oscillation guide assembly and a Y-direction oscillation guide assembly connected to the oscillation working support, and a guide connection assembly disposed between the X-direction oscillation guide assembly and the Y-direction oscillation guide assembly and connected to both of them;

[0023] The Y-direction oscillation guide assembly is arranged above the guide connection assembly, and the oscillation tray is connected to the Y-direction oscillation guide assembly.

[0024] Preferably, the X-direction oscillation guide assembly comprises a first oscillation slide rail and a first oscillation slider which slide in cooperation with each other, the first oscillation slide rail is arranged along the X-direction and connected to the oscillation working bracket, and the first oscillation slider is connected to the guide connection assembly;

[0025] And / or the Y-direction oscillation guide assembly includes a second oscillation slide rail and a second oscillation slider that slide in cooperation with each other, the second oscillation slide rail is arranged along the Y-direction and connected to the oscillation tray, and the second oscillation slider is connected to the guide connection assembly.

[0026] Preferably, the guide connection assembly comprises:

[0027] A first guide connecting member, a first oscillating slider installation groove is provided on a bottom surface thereof, the first oscillating slider is arranged in the first oscillating slider installation groove, and the first oscillating slider is connected to the first guide connecting member;

[0028] A second guide connecting member, a top surface of which is provided with a second oscillating slider installation groove, the second oscillating slider is arranged in the second oscillating slider installation groove, and the second oscillating slider is connected to the second guide connecting member;

[0029] A fastening connector, wherein fastening mounting grooves are provided on the sides of the first guide connector and the second guide connector, the second guide connector is stacked on top of the first guide connector, and the fastening connector is arranged in the fastening mounting groove to connect the first guide connector and the second guide connector.

[0030] Preferably, the distance between the center of the eccentric wheel assembly and the center of the stepper motor ranges from 1 mm to 1.5 mm.

[0031] Preferably, the vibration tray comprises:

[0032] A tray bottom plate, the eccentric wheel mounting groove is arranged at the bottom of the tray bottom plate, and the bottom of the tray bottom plate is connected to the XY-direction oscillation guide assembly;

[0033] A tray stopper, which is arranged at the edge of the tray bottom plate;

[0034] The plunger spring is installed on the inner side of the tray limiter, and the test consumables are placed on the bottom plate of the tray.

[0035] The utility model also provides a liquid transfer device, comprising the oscillating structure.

[0036] Compared with the prior art, the utility model has the following beneficial effects: in the utility model, the stepper motor rotates to drive the eccentric wheel assembly to move through the coupling assembly, thereby driving the oscillation tray connected to the eccentric wheel assembly to move along the XY direction in the horizontal plane to shake the test tube, so that the mixed liquid therein is oscillated evenly.

[0037] In addition, the above test consumables can be quickly disassembled and placed on the shaking tray, and test tubes containing mixed reagents are placed on the test consumables. After the shaking is completed, the test tubes and test consumables are removed synchronously. When the shaking structure is working, test tubes can be placed on the test consumables for shaking, and the test tubes and test consumables are moved to the shaking tray at the same time, thereby improving work efficiency.

[0038] At the same time, when the stepper motor drives the oscillation tray to move in the horizontal plane, the reset spring is stretched. When the stepper motor stops working, the reset spring contracts and pulls the stepper motor to reset, so that the test consumables on the oscillation tray return to the origin, making it easier for the automation system to identify the position of the test consumables, so that the oscillation structure can be applied to the automation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1a It is a structural schematic diagram of the first angle of the oscillation structure in the utility model;

[0040] Figure 1b It is a structural schematic diagram of the second angle of the oscillation structure in the utility model;

[0041] Figure 2 It is a structural schematic diagram of the oscillating structure in the utility model (excluding the oscillating tray);

[0042] Figure 3 It is a structural schematic diagram of the coupling assembly in the utility model;

[0043] Figure 4a It is a front view of the coupling assembly in the utility model;

[0044] Figure 4b For the utility model Figure 4a AA section view;

[0045] Figure 5a It is a structural schematic diagram of a first angle of the XY-direction oscillation guide assembly in the utility model;

[0046] Figure 5bIt is a structural schematic diagram of a second angle of the XY-direction oscillation guide assembly in the utility model;

[0047] Figure 6a It is a structural schematic diagram of a first angle of the first guide connecting member in the utility model;

[0048] Figure 6b It is a structural schematic diagram of a second angle of the first guide connecting member in the utility model;

[0049] Figure 7a It is a structural schematic diagram of a first angle of the vibration tray in the utility model;

[0050] Figure 7b It is a structural schematic diagram of the second angle of the vibration tray in the utility model.

[0051] Among them, 81, vibration working bracket; 800, test consumables; 811, vibration support frame; 812, vibration mounting plate; 8122, weight reduction slot;

[0052] 82, oscillation motor assembly; 823, stepping motor; 824, coupling assembly; 8241, first coupling member; 8242, second coupling member; 8243, connecting shaft;

[0053] 83. eccentric wheel assembly; 831. cam follower;

[0054] 84, XY-axis oscillation guide assembly; 841, first oscillation slide rail; 842, first oscillation slider; 843, second oscillation slide rail; 844, second oscillation slider; 845, guide connection assembly; 8451, first guide connection piece; 84511, first oscillation slider installation groove; 84512, first slider fastening hole; 84513, fastening installation groove; 8452, second guide connection piece; 8453, fastening connection piece;

[0055] 85. Oscillating tray; 851. Tray bottom plate; 852. Tray stopper; 853. Plunger spring; 854. Tray support plate;

[0056] 86, reset assembly; 863, first fixing member; 864, reset spring; 865, crank connecting rod member; 8651, first connecting member; 8652, second connecting member; 8653, crank; 866, second fixing member;

[0057] 88. Buffer. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0059] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0061] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0062] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0064] The embodiments of the present invention are described in detail below, and examples of the embodiments 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.

[0065] like Figure 1a , Figure 1b , Figure 2 As shown, an oscillation structure is provided in this embodiment, including an oscillation working support 81, an oscillation motor assembly 82, an eccentric wheel assembly 83, an XY oscillation guide assembly 84, an oscillation tray 85 and a reset assembly 86, wherein the oscillation motor assembly 82 includes a stepper motor 823 and a coupling assembly 824, and the stepper motor 823 is installed on the oscillation working support 81. The stepper motor 823 passes through the output end of the oscillation working support 81 and the eccentric wheel assembly 83 eccentrically arranged, and both are connected to the coupling assembly 824. That is, two groups of mounting holes are arranged on the coupling assembly 824, and the two groups of mounting holes are eccentrically arranged up and down, and the output end of the stepper motor 823 passes through the oscillation working space and is connected to one group of mounting holes, and the eccentric wheel assembly 83 is connected to the other group of mounting holes. The stepper motor 823 drives the eccentric wheel to move in the plane through the coupling assembly 824.

[0066] The oscillating tray 85 is connected to the eccentric wheel assembly 83, and the eccentric wheel assembly 83 can rotate relative to the oscillating tray 85. The detachable test consumables 800 are placed on the oscillating tray 85. The test consumables include PCR plates, fragment analyzer plates, ELISA plates, deep well plates, test tube racks and test tubes on the test tube racks.

[0067] The XY-direction oscillation guide assembly 84 is disposed between the oscillation working support 81 and the oscillation tray 85. The XY-direction oscillation guide assembly 84 is located on one side of the eccentric wheel assembly 83. The XY-direction oscillation guide assembly 84 limits the oscillation tray 85 to move along the X-direction and the Y-direction in the horizontal plane.

[0068] The reset assembly 86 includes a first fixing member 863 , a reset spring 864 , and a crank connecting rod member 865 . The first fixing member 863 is disposed on the oscillating working support 81 or at the bottom of the oscillating tray 85 .

[0069] The crank-connecting rod 865 is installed on the coupling assembly 824 and can rotate relative to the coupling assembly 824. The rotation center of the crank-connecting rod 865 is not coaxial with the stepper motor 823 and / or the coupling assembly 824. When the coupling assembly 824 rotates, the crank-connecting rod 865 can rotate relative to the coupling assembly 824. Due to the eccentric movement of the eccentric wheel assembly 83, the return spring 864 is stretched and deformed, preventing the return spring 864 from being wrapped around the coupling assembly 824.

[0070] One end of the return spring 864 is connected to the crank connecting rod 865, and the other end is connected to the first fixing member 863. When the stepper motor 823 rotates, the return spring 864 is stretched, but the return spring 864 will not be wound around the coupling assembly 824.

[0071] In the above-mentioned X direction and Y direction in this embodiment, as shown in FIG. Figure 2 shown.

[0072] In this embodiment, the stepper motor 823 rotates to drive the eccentric wheel assembly 83 to move through the coupling assembly 824, thereby driving the oscillation tray 85 connected to the eccentric wheel assembly 83 to move in the horizontal plane along the X and Y directions to shake the test tubes so that the liquid in each test tube can be vortex mixed around the central axis of the test tube.

[0073] The XY oscillation guide assembly 84 provides precise guidance for the movement of the oscillation tray 85 in the horizontal plane, and limits the movement amplitude of the oscillation tray 85 in the horizontal plane along the X and Y directions, thereby preventing the oscillation tray 85 from shaking with excessive displacement during the oscillation process, thereby causing the mixed liquid in the test tube to be shaken out.

[0074] In addition, the test consumables 800 can be quickly disassembled and placed on the shaking tray 85. Test tubes containing mixed reagents are placed on the test consumables 800. After the shaking is completed, the test tubes and the test consumables 800 are removed synchronously. When the shaking structure is working, test tubes can be placed on the test consumables 800 for shaking. The test tubes and the test consumables 800 are moved to the shaking tray 85 at the same time, thereby improving work efficiency.

[0075] At the same time, when the stepper motor 823 drives the oscillation tray 85 to move in the horizontal plane, the reset spring 864 is stretched, and when the stepper motor 823 stops working, the reset spring 864 contracts, pulling the stepper motor 823 to reset. This allows the test consumables 800 on the oscillation tray 85 to return to the origin, making it easier for the automation system to identify the position of the test consumables 800, so that the oscillation structure can be applied to the automation system.

[0076] In this embodiment, the test consumable 800 is detachably placed on the vibration tray 85. The specific manner of "detachability" includes that the test consumable 800 can be clamped to the vibration tray 85 by the robot, and when placed on the vibration tray 85, the test consumable 800 can be clamped by the vibration tray 85. When the robot clamps the test consumable 800, it can quickly detach from the vibration tray 85 after being clamped by the robot. When the test consumable 800 is detached from the vibration tray 85, the robot uses less force, and the mixed liquid in the test tube will not be shaken and splashed due to the detachment of the vibration tray 85.

[0077] In this embodiment, the specific structure for realizing the detachable test consumables on the oscillation tray 85 includes: a plunger spring 853 is provided on the upper side wall of the oscillation tray 85, and the side wall of the test consumables 800 is clamped by the plunger spring 853. Or, a first magnetic component is provided on the oscillation tray 85, and a second magnetic component is provided on the test consumables 800, the first magnetic component and the second magnetic component are mutually adsorbed, and the first magnetic component is powered on and off to control the first magnetic component and the second magnetic component, so as to realize the rapid disassembly of the test consumables on the oscillation tray 85. Or, a lifting and rotating oil cylinder is provided on the oscillation working bracket 81, and the output end of the lifting and rotating oil cylinder is connected to a clamping rod, and the head of the clamping rod is provided with a clamping head, and the clamping head is L-shaped, and the clamping rod can be lifted and rotated through the oscillation tray. The lifting and rotating oil cylinder drives the clamping rod to rise and rotate, and rotates to a state where it can contact the test consumables, and the lifting and rotating oil cylinder descends, and the clamping head can clamp the test consumables 800. When the clamping head releases the test consumable 800, the lifting and rotating oil cylinder drives the clamping rod to rise, and then rotates, and the lifting and rotating oil cylinder descends and returns to the inside or below the oscillating working bracket 81.

[0078] The oscillation frequency range of the stepper motor 823 in this embodiment is 500rpm-2000rpm. Specifically, the oscillation frequency of the stepper motor 823 is 500rpm, 1000rpm, 1500rpm, and 2000rpm. When the oscillation frequency of the stepper motor 823 is lower than 500rpm, the oscillation effect is poor, and the mixed liquid in the test tube is mixed evenly. When the oscillation frequency of the stepper motor 823 is higher than 2000rpm, the oscillation is violent, causing the mixed liquid in the test tube to easily spill. The oscillation frequency can be adjusted according to actual needs.

[0079] like Figure 2As shown, the oscillation working bracket 81 includes an oscillation support frame 811 and an oscillation mounting plate 812. The oscillation mounting plate 812 is installed above the oscillation support frame 811. The oscillation motor assembly 82 is arranged in the oscillation support frame 811 and connected to the oscillation mounting plate 812. The oscillation motor assembly 82 is located below the oscillation mounting plate 812. The output end of the oscillation motor assembly 82 passes through the oscillation mounting plate 812 and is connected to the eccentric wheel assembly 83. The XY oscillation guide assembly 84 is connected to the oscillation mounting plate 812 and is located on the upper surface of the oscillation mounting plate 812.

[0080] By setting an oscillation support frame 811 and an oscillation mounting plate 812, the oscillation support frame 811 is a hollow structure, and the stepper motor 813 is set in the space of the oscillation support frame 811, and its output end extends out of the oscillation mounting plate 812. The structure is compact and integral, and the oscillation support frame 811 is set as a hollow structure. The overall structure is light in weight and easy to install.

[0081] Preferably, an eccentric wheel mounting groove is provided at the bottom of the vibration tray 85, and the gap between the eccentric wheel assembly 83 and the eccentric wheel mounting groove ranges from 0.1 mm to 0.2 mm. The clearance between the eccentric wheel mounting groove and the eccentric wheel assembly 83 ensures that the eccentric wheel assembly 83 rotates, but does not drive the vibration tray 85 to rotate. During the eccentric rotation of the eccentric wheel assembly 83, it can only push the vibration tray 85 to move along the X and Y directions in the horizontal plane to generate vibration, and the vibration tray 85 and the eccentric wheel assembly 83 will not be disengaged. Preferably, the gap between the eccentric wheel assembly 83 and the eccentric wheel mounting groove is 0.1 mm.

[0082] Preferably, a motor mounting hole is provided on the side of the oscillation mounting plate 812 facing the upper eccentric wheel, and the output end of the oscillation motor assembly 82 extends out of the motor mounting hole and is connected to the eccentric wheel assembly 83. A weight-reducing groove 8122 is provided in the circumference of the motor mounting hole, and the return spring 864 and the first fixing member 863 are provided in the weight-reducing groove 8122. Further preferably, the weight-reducing grooves 8122 are evenly distributed along the circumference of the motor mounting hole, and the weight-reducing grooves 8122 are U-shaped. There are four groups of weight-reducing grooves 8122 in this embodiment.

[0083] The oscillation structure further includes a tray support plate 854 disposed between the oscillation tray 85 and the oscillation mounting plate 812, so as to support the oscillation tray 85. Due to the structural dimensions of the coupling assembly 824 in the oscillation structure along the Z direction, the tray support plate 854 is disposed to ensure the structural dimensions of the coupling assembly 824, and also to facilitate the connection of the oscillation tray 85 with the XY-direction oscillation guide assembly 84 and the eccentric wheel assembly 83. Specifically, the tray support plate 854 is a square ring member.

[0084] Preferably, if Figure 2 , Figure 3 , Figure 4a , Figure 4b As shown, the coupling assembly 824 includes: a first coupling member 8241 and a second coupling member 8242 are arranged in parallel up and down, and a connecting shaft 8243, one end of the connecting shaft 8243 is connected to the first coupling member 8241, and the other end is connected to the second coupling member 8242. Preferably, the first coupling member 8241 and the connecting shaft 8243 are interference fitted, and the second coupling member 8242 and the connecting shaft 8243 are interference fitted. In other embodiments, the first coupling member 8241, the second coupling member 8242, and the connecting shaft 8243 are an integrally processed structure.

[0085] The crank connecting rod 865 is arranged between the first coupling 8241 and the second coupling 8242, and is sleeved on the connecting shaft 8243. The first coupling 8241 is connected to the output shaft of the stepper motor 813, and the second coupling 8242 is connected to the eccentric wheel assembly 83. The first coupling 8241 and the second coupling 8242 rotate synchronously, driving the vibration tray 85 to move along the XY direction in the horizontal plane, thereby generating vibration, so that the mixed liquid in the test tube is mixed evenly. At the same time, the structure of the first coupling 8241, the second coupling 8242 and the connecting shaft 8243 is arranged in an "I" shape, which is simple in structure, easy to process and install, and low in cost.

[0086] Preferably, the crank connecting rod 865 includes a sleeve and a crank 8653 connected to the sleeve, the sleeve is sleeved on the connecting shaft 8243 and can rotate relative to the connecting shaft 8243, and one end of the return spring 864 is connected to the crank 8653. The crank 8653 fixes the return spring 864, and the sleeve rotates relative to the connecting shaft 8243, thereby preventing the return spring 864 from being wound around the sleeve. When the first coupling 8241 and the second coupling 8242 rotate synchronously, the return spring 864 is only stretched and deformed.

[0087] Preferably, the shaft sleeve includes a first connecting member 8651 and a second connecting member 8652, which are coaxial and relatively arranged on the outer periphery of the connecting shaft 8243, and the first connecting member 8651 and the second connecting member 8652 are both provided with semicircular holes, and the two are relatively connected and sleeved on the connecting shaft 8243. The crank 8653 is connected to the second connecting member 8652. Preferably, the second connecting member 8652 and the crank 8653 are integrally formed. The two are integrally formed, which is convenient for installation and processing and saves installation space.

[0088] Preferably, a second fixing member 866 is provided on the crank 8653, one end of the return spring 864 is connected to the second fixing member 866, and the other end is connected to the first fixing member 863. In other embodiments, a connecting hole is provided on the crank 8653, one end of the return spring 864 is connected to the connecting hole, and the other end is connected to the first fixing member 863.

[0089] One end of the connecting shaft 8243 is interference fitted with the first coupling member 8241, and the other end is interference fitted with the second connecting shaft 8243. To facilitate the assembly of the crank-connecting rod member 865, the crank-connecting rod member 865 is divided into two parts, a first connecting member 8651 and a second connecting member 8652. Connecting holes are provided on the first connecting member 8651 and the second connecting member 8652, and screws are inserted through the connecting holes to connect the first connecting member 8651 and the second connecting member 8652.

[0090] Preferably, the distance between the center of the eccentric wheel assembly 83 and the center of the stepper motor 823 ranges from 1mm to 1.5mm. Specifically, the distance between the center of the eccentric wheel assembly 83 and the center of the stepper motor 823 (i.e., the center of the second coupling 8242) ranges from 1mm to 1.5mm. Through the eccentric rotation of the eccentric wheel assembly 83, the oscillation tray 85 is displaced in the XY direction in the horizontal plane, thereby producing an oscillation effect. Preferably, the distance between the center of the eccentric wheel assembly 83 and the center of the oscillation motor assembly 82 ranges from 1mm or 1.5mm. When the distance between the two is less than 1mm, the displacement produced by the eccentric motion of the eccentric wheel assembly 83 is small, resulting in insufficient oscillation effect. When the distance between the two is greater than 1.5mm, the displacement produced by the eccentric motion of the eccentric wheel assembly 83 is large, which easily causes the mixed reagent in the test tube to shake violently, affecting the mixing effect.

[0091] Preferably, the eccentric wheel assembly 83 includes a cam follower 831, and the shaft of the cam follower 831 is connected to the coupling 822. The bearing end of the cam follower 831 is connected to the bottom of the oscillation tray 85. The distance between the center of the cam follower 831 and the center of the stepper motor 823 ranges from 1 mm to 1.5 mm. When the distance between the two is less than 1 mm, the displacement caused by the eccentric motion of the cam follower 831 is small, resulting in insufficient oscillation effect. When the distance between the two is greater than 1.5 mm, the displacement caused by the eccentric motion of the cam follower 831 is large, which easily causes the mixed reagent in the test tube to shake violently, affecting the mixing effect. The cam follower 831 is selected according to actual needs and is a conventional structure on the market.

[0092] In other embodiments, the eccentric wheel assembly 83 includes an eccentric wheel, an eccentric connecting shaft and an intermediate connecting bearing, one end of the eccentric connecting shaft is connected to the coupling 822, and the other end of the eccentric connecting shaft is connected to the inner ring of the intermediate connecting bearing. The eccentric wheel is sleeved on the outer ring of the intermediate connecting bearing, and at the same time, the eccentric wheel is connected to the vibration tray 85 and can rotate relative to the vibration tray 85. Specifically, an eccentric wheel mounting groove 8512 is provided at the bottom of the above-mentioned vibration tray 85, and the eccentric wheel and the eccentric wheel mounting groove 8512 are clearance-matched. Preferably, the gap between the eccentric wheel and the eccentric wheel mounting groove 8512 ranges from 0.1mm to 0.2mm. Further preferably, the gap between the eccentric wheel and the eccentric wheel mounting groove 8512 is 0.1mm, 0.15mm and 0.2mm.

[0093] Preferably, the distance between the center of the eccentric wheel and the center of the stepper motor 823 (i.e., the center of the second coupling 8242) is in the range of 1 mm to 1.5 mm. Preferably, the distance between the center of the eccentric wheel and the center of the stepper motor (i.e., the center of the second coupling 8242) is in the range of 1 mm or 1.5 mm.

[0094] Preferably, in this embodiment, the eccentric wheel assembly 83 is a cam follower 831, and two groups of XY oscillation guide assemblies 84 are provided, and the two groups of XY oscillation guide assemblies 84 are symmetrically arranged on both sides of the oscillation motor assembly 82. Specifically, the two groups of XY oscillation guide assemblies 84 are symmetrically arranged on both sides of the stepper motor 823. When the oscillation tray 85 moves in the horizontal plane, the XY oscillation guide assemblies 84 guide the movement of the oscillation tray 85 along the X and Y directions, and the two groups of XY oscillation guide assemblies 84 can ensure that the oscillation tray 85 is uniformly stressed, thereby ensuring that the oscillation tray 85 moves smoothly in the horizontal plane and shakes evenly.

[0095] In this embodiment, an eccentric wheel mounting groove 8512 is provided at the bottom of the oscillation tray 85, and the cam follower 831 is clearance-matched with the eccentric wheel mounting groove 8512. Preferably, the clearance between the cam follower 831 and the eccentric wheel mounting groove 8512 is in the range of 0.1 mm to 0.2 mm. Further preferably, the clearance between the cam follower 831 and the eccentric wheel mounting groove 8512 is 0.1 mm, 0.15 mm and 0.2 mm.

[0096] Preferably, if Figure 2 , Figure 5a , Figure 5b , Figure 6a and Figure 6bAs shown, the XY-direction oscillation guide assembly 84 includes an X-direction oscillation guide assembly, a guide connection assembly 845 and a Y-direction oscillation guide assembly, wherein the X-direction oscillation guide assembly is connected to the oscillation working support 81, specifically, the X-direction oscillation guide assembly is connected to the oscillation mounting plate 812, the guide connection assembly 845 is arranged between the X-direction oscillation guide assembly and the Y-direction oscillation guide assembly, and both the X-direction oscillation guide assembly and the Y-direction oscillation guide assembly are connected to the guide connection assembly 845. The oscillation tray 85 is connected to the Y-direction oscillation guide assembly. The X-direction oscillation guide assembly and the Y-direction oscillation guide assembly are stacked and fixed, and the oscillation tray 85 is limited to a small-amplitude shaking in the horizontal plane during the movement, and the shaking amplitude radius ranges from 1mm to 1.5mm, so that the test tube oscillates and the mixed liquid therein is stable.

[0097] Preferably, if Figure 5a , Figure 5b As shown, the X-direction oscillation guide assembly includes a first oscillation slide rail 841 and a first oscillation slider 842 that slide in cooperation with each other. The first oscillation slide rail 841 is arranged along the X direction and is connected to the oscillation working bracket 81. Specifically, the first oscillation slide rail 841 is connected to the oscillation mounting plate 812, and the first oscillation slider 842 is connected to the guide connection assembly 845. More specifically, the first oscillation slider 842 is fastened to the guide connection assembly 845 by four groups of bolts. Through the mutual cooperation and sliding of the first oscillation slide rail 841 and the first oscillation slider 842, the X-direction movement of the oscillation tray 85 is accurately guided to ensure the movement amplitude.

[0098] Preferably, the Y-direction oscillation guide assembly includes a second oscillation rail 843 and a second oscillation slider 844 that slide in cooperation with each other, and the second oscillation rail 843 is arranged along the Y direction and connected to the oscillation tray 85. The second oscillation slider 844 is connected to the guide connection assembly 845, and specifically, the second oscillation slider 844 is fastened to the guide connection assembly 845 by four groups of bolts. Through the cooperation and sliding of the second oscillation rail 843 and the second oscillation slider 844, the Y-direction movement of the oscillation tray 85 is accurately guided to ensure the movement range.

[0099] Preferably, a guide rail mounting member is provided at the bottom of the oscillating tray 85, on which a guide rail mounting groove is provided, and the second oscillating slide rail 843 is installed in the guide rail mounting groove. Specifically, the guide rail mounting member 8511 is fastened to the bottom of the tray bottom plate 851 by screws.

[0100] Preferably, if Figure 5a , Figure 5b , Figure 6a , Figure 6bAs shown, the guide connection assembly 845 includes a first guide connection member 8451, a second guide connection member 8452 and a fastening connection member 8453, wherein a first oscillating slider installation groove 84511 is provided on the bottom surface of the first guide connection member 8451, the first oscillating slider 842 is provided in the first oscillating slider installation groove 84511, and the first oscillating slider 842 is fastened and connected to the first guide connection member 8451 by four groups of bolts. Specifically, a first slider fastening hole 84512 is provided at the bottom of the first oscillating slider installation groove 84511, and a screw is inserted through the first slider fastening hole 84512 to connect the first guide connection member 8451 and the first oscillating slider 842.

[0101] A second oscillating slider installation groove is provided on the top surface of the second guide connector 8452, and the second oscillating slider 844 is provided in the second oscillating slider installation groove. The second oscillating slider 844 is fastened to the second guide connector 8452 by four sets of bolts. The second oscillating slider 844 is supported by the second guide connector 8452 to facilitate fixing the second oscillating slider 844. Specifically, a second slider fastening hole is provided at the bottom of the second oscillating slider installation groove, and a screw is inserted through the second slider fastening hole to connect the second guide connector 8452 and the second oscillating slider 844.

[0102] The sides of the first guide connector 8451 and the second guide connector 8452 are both provided with fastening installation grooves 84513 . The second guide connector 8452 is stacked on top of the first guide connector 8451 . The fastening connector 8453 is arranged in the fastening installation grooves 84513 to connect the first guide connector 8451 and the second guide connector 8452 .

[0103] The outer dimensions of the first guide connecting member 8451 and the second guide connecting member 8452 are the same as the structures arranged thereon. After the connecting member 8453 is installed and tightened, the outer dimensions of the two are not affected. The overall structure is small in size and does not occupy too much space. The overall structure of the oscillation structure is compact.

[0104] Regarding the specific structure of the above-mentioned vibration tray 85, as Figure 7a and Figure 7b As shown, the oscillating tray 85 includes a tray bottom plate 851, a tray stopper 852 and a plunger spring 853, wherein the tray bottom plate 851 is connected to the eccentric wheel assembly 83 and is also connected to the XY-direction oscillating guide assembly 84. Specifically, an eccentric wheel mounting groove is provided at the bottom of the tray bottom plate 851, and the cam follower 831 is installed in the eccentric wheel mounting groove.

[0105] The tray stopper 852 is disposed at the boundary of the tray bottom plate 851. Specifically, the tray stopper 852 is disposed at the four sides of the tray bottom plate 851, or the tray stopper 852 is disposed at the corners of the tray bottom plate 851, or the tray stopper 852 is disposed at the corners and sides of the tray bottom plate 851 at the same time.

[0106] The plunger spring 853 is installed on the inner side of the tray limiter 852 . The test consumables are placed on the tray bottom plate 851 . The plunger spring 853 can quickly clamp the test consumables and can quickly release the test consumables when the test consumables are removed.

[0107] In this embodiment, the plunger spring 853 is used to clamp the side wall of the test consumables located on the tray bottom plate 851. After the shaking is completed, the test consumables and the test tubes thereon are removed by a robot or manually, thereby achieving rapid removal and placement.

[0108] Preferably, the tray limiting members 852 are disposed at the four corners of the tray bottom plate 851 , and the tray limiting members 852 are in a right-angle shape.

[0109] Preferably, a buffer 88 is provided on the tray bottom plate 851 , and the test consumables 800 are placed on the buffer 88 , which can prevent slipping on the one hand, and prevent the tray bottom plate 851 from directly contacting the test consumables 800 on the other hand, thereby avoiding noise.

[0110] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An oscillating structure, characterized in that: include: Oscillating working support (81); An oscillating motor assembly (82) and an eccentric wheel assembly (83), wherein the oscillating motor assembly (82) comprises a stepping motor (823) and a coupling assembly (824), and the stepping motor (823) is mounted on the oscillating working bracket (81); The stepper motor (823) is eccentrically arranged through the output end of the oscillating working support (81) and the eccentric wheel assembly (83), and both are connected to the coupling assembly (824); An oscillating tray (85) connected to the eccentric wheel assembly (83), wherein the eccentric wheel assembly (83) is rotatable relative to the oscillating tray (85), and a detachable test consumable (800) is placed on the oscillating tray (85); An XY-direction oscillation guide assembly (84), which is disposed between the oscillation working support (81) and the oscillation tray (85), the XY-direction oscillation guide assembly (84) being located on one side of the eccentric wheel assembly (83), and the XY-direction oscillation guide assembly (84) limiting the oscillation tray (85) to move in the X direction and the Y direction in a horizontal plane; A reset assembly (86), comprising a first fixing member (863), a reset spring (864), and a crank connecting rod member (865), wherein the first fixing member (863) is arranged on the oscillating working support (81) or on the bottom of the oscillating tray (85); a crank connecting rod (865) connected to the coupling assembly (824) and capable of rotating relative to the coupling assembly (824), wherein the rotation center of the crank connecting rod (865) is not coaxial with the stepping motor (823) and / or the coupling assembly (824); One end of the return spring (864) is connected to the crank connecting rod (865), and the other end is connected to the first fixing member (863).

2. The oscillating structure according to claim 1, characterized in that: An eccentric wheel mounting groove is provided at the bottom of the vibration tray (85), and a gap between the eccentric wheel assembly (83) and the eccentric wheel mounting groove ranges from 0.1 mm to 0.2 mm.

3. The oscillating structure according to claim 1, characterized in that: The coupling assembly (824) comprises: a first coupling member (8241) and a second coupling member (8242) arranged in parallel up and down, and a connecting shaft (8243), one end of the connecting shaft (8243) being connected to the first coupling member (8241), and the other end being connected to the second coupling member (8242); The crank connecting rod member (865) is arranged between the first coupling member (8241) and the second coupling member (8242), and is sleeved on the connecting shaft (8243); The first coupling member (8241) is connected to the output shaft of the stepper motor (823), and the second coupling member (8242) is connected to the eccentric wheel assembly (83).

4. The oscillating structure according to claim 3, characterized in that: The crank connecting rod member (865) includes a sleeve and a crank (8653) connected to the sleeve. The sleeve is sleeved on the connecting shaft (8243) and can rotate relative to the connecting shaft (8243). One end of the return spring (864) is connected to the crank (8653).

5. The oscillating structure according to claim 2, characterized in that: The XY-direction oscillation guide assembly (84) comprises an X-direction oscillation guide assembly and a Y-direction oscillation guide assembly connected to the oscillation working support (81), and a guide connection assembly (845) arranged between the X-direction oscillation guide assembly and the Y-direction oscillation guide assembly and connected to both of them; The Y-direction oscillation guide component is arranged above the guide connection component (845), and the oscillation tray (85) is connected to the Y-direction oscillation guide component.

6. The oscillating structure according to claim 5, characterized in that: The X-direction oscillation guide assembly comprises a first oscillation slide rail (841) and a first oscillation slider (842) which slide in cooperation with each other, the first oscillation slide rail (841) being arranged along the X-direction and connected to the oscillation working support (81), and the first oscillation slider (842) being connected to the guide connection assembly (845); And / or the Y-direction oscillation guide assembly includes a second oscillation slide rail (843) and a second oscillation slider (844) that slide in cooperation with each other, the second oscillation slide rail (843) is arranged along the Y-direction and connected to the oscillation tray (85), and the second oscillation slider (844) is connected to the guide connection assembly (845).

7. The oscillating structure according to claim 6, characterized in that: The guide connection assembly (845) comprises: A first guide connecting member (8451), a bottom surface of which is provided with a first oscillating slider installation groove (84511), the first oscillating slider (842) being arranged in the first oscillating slider installation groove (84511), and the first oscillating slider (842) being connected to the first guide connecting member (8451); A second guide connecting member (8452), a top surface of which is provided with a second oscillation slider installation groove, the second oscillation slider (844) is arranged in the second oscillation slider installation groove, and the second oscillation slider (844) is connected to the second guide connecting member (8452); A fastening connector (8453), the sides of the first guide connector (8451) and the second guide connector (8452) are both provided with fastening installation grooves, the second guide connector (8452) is stacked on top of the first guide connector (8451), and the fastening connector (8453) is arranged in the fastening installation groove to connect the first guide connector (8451) and the second guide connector (8452).

8. The oscillating structure according to any one of claims 1 to 7, characterized in that: The distance between the center of the eccentric wheel assembly (83) and the center of the stepper motor (823) ranges from 1 mm to 1.5 mm.

9. The oscillating structure according to claim 2, characterized in that: The vibration tray (85) comprises: A tray bottom plate (851), the eccentric wheel mounting groove is arranged at the bottom of the tray bottom plate (851), and the bottom of the tray bottom plate (851) is connected to the XY-direction oscillation guide assembly (84); A tray stopper (852), which is arranged at the edge of the tray bottom plate (851); The plunger spring (853) is installed on the inner side of the tray stopper (852), and the test consumable (800) is placed on the tray bottom plate (851).

10. A liquid transfer device, characterized in that: The invention comprises the oscillating structure as described in any one of claims 1 to 9.

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