A driving device for a thromboelastography detection device and a thromboelastography

Abstract

The utility model provides a kind of driving device for thromboelastometry detection device can reduce or reduce the vibration caused when driving device drives sample cup or probe module to rotate, improve the stability of driving, improve thromboelastometry detection device precision.Driving device for thromboelastometry detection device includes base plate, cam connecting rod mechanism and eccentric driving part being arranged in the base plate, the base plate is provided with baffle and convex part;The cam connecting rod mechanism includes oppositely arranged first rod and the second rod with elasticity, the first rod can be moved relative to the base plate and is located by the baffle in two end point positions;The eccentric driving part is adapted to the second rod to alternately abut and drive one of oppositely arranged third rod and fourth rod to rotate, and the other is pressed against convex part and separated from the eccentric driving part by the action of the second rod.

Description

Technical Field

[0001] This utility model relates to the field of blood testing technology, specifically to a driving device for a thromboelastography detection device and a thromboelastography instrument. Background Technology

[0002] In the field of medical testing, thromboelastography (TEG) is an important medical device widely used to assess blood coagulation function, monitor the effectiveness of anticoagulation therapy, and diagnose hemorrhagic diseases. During operation, a drive mechanism is required to provide driving force, enabling the sample cup or probe module to complete a reciprocating rotation at a specific angle (e.g., 4.75°) to accurately measure the coagulation characteristics of blood.

[0003] Currently, most commercially available thromboelastography (TEG) instruments use a motor-driven cam transmission mechanism to achieve the reciprocating rotation of the sample cup. The working principle of this mechanism is as follows: the drive motor is directly connected to the cam, driving the cam to perform circular motion. The cam's periphery maintains close contact with the side of the drive plate. When the cam rotates, its changing shape pushes the drive plate, causing it to reciprocate, ultimately achieving a 4.75° reciprocating rotation of the sample cup. However, this driving method results in additional vibration, thus affecting the detection accuracy. Utility Model Content

[0004] The purpose of this invention is to provide a driving device for a thromboelastography detection apparatus that can reduce or minimize vibration caused by the driving device rotating the sample cup or probe module, thereby improving the stability of the drive and the accuracy of the thromboelastography detection apparatus.

[0005] To achieve the above objectives, this utility model provides a driving device for a thromboelastography detection device. The driving device for the thromboelastography detection device includes a base plate, a cam linkage mechanism disposed on the base plate, and an eccentric driving member. The base plate is provided with a stop and a protrusion. The cam linkage mechanism includes a first rod disposed opposite to the base plate and a second rod with elasticity. The first rod can move relative to the base plate and is limited to two end positions by the stop. The eccentric drive member is adapted to the second rod to alternately abut against and drive one of the oppositely arranged third and fourth rods to rotate, while the other rod is pressed against the protrusion and separated from the eccentric drive member by the action of the second rod.

[0006] By employing a planar cam linkage mechanism to drive the sample cup or probe module to reciprocate, the first link serves as the power output end of the planar cam linkage mechanism. The third and fourth links are adapted to the eccentric drive component as a transmission mechanism, while the second link is an elastic component that can buffer the minute vibrations generated during the unilateral contact between the eccentric drive component and the third and fourth links, preventing vibrations from being transmitted from the first link to the sample cup and probe module. This reduces or minimizes the vibrations caused by the drive device rotating the sample cup or probe module, improves the stability of the drive, and enhances the accuracy of the thromboelastography detection device.

[0007] Optionally, it also includes a power source, wherein the eccentric drive has an inner ring and an outer ring that can rotate relative to the inner ring, the inner ring being fixedly connected to the power output end of the power source. In this way, when the eccentric drive contacts only one side of both the third and fourth rods, conventional sliding friction can be replaced by rolling friction, thereby further reducing frictional force.

[0008] Optionally, the first rod is slidably adapted to the substrate and can move linearly between the two endpoints along a first direction. This linear movement ensures consistency in the magnitude of movement at each point along its trajectory, allowing for consistent motion even when multiple sample cups or probe modules are connected to the first rod.

[0009] Optionally, a midpoint is provided between the two endpoints, where both the third and fourth rods are limited by the protrusion. This allows the midpoint to be limited by the protrusion.

[0010] Optionally, both the protrusion and the eccentric drive member are located inside the cam linkage mechanism, with the eccentric drive member positioned between the protrusion and the first rod. This arrangement reduces the space occupied by the drive device.

[0011] Optionally, it further includes a power source and an eccentric shaft connected to the power source; the eccentric shaft is fitted with a drive roller, which rotates about the central axis of the eccentric shaft; the central axis of the eccentric shaft is perpendicular to the substrate. This allows the eccentric drive element to rotate along a reference circle.

[0012] Optionally, the drive roller rotates along a reference circle; the third and fourth rods are projected in a direction perpendicular to the substrate to form a first projection and a second projection spaced apart, the first projection covering a portion of the reference circle, and the second projection covering a portion of the reference circle. This allows the rotational motion of the eccentric drive member to be converted into linear movement of the first rod.

[0013] Optionally, at the midpoint, the third rod is parallel to the fourth rod and both are perpendicular to the first rod.

[0014] A thromboelastography instrument includes a probe module, a twisted wire, and a driving device. One end of the twisted wire is connected to a first rod, and the other end is connected to the probe module. Thus, the first rod can drive the probe module to move.

[0015] Optionally, the first rod is provided with a plurality of connectors, which are spaced apart along the extension direction of the first rod, and are used to connect to the twisted wire. This allows multiple probe modules to be connected to the first rod, improving testing efficiency and reducing testing costs.

[0016] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0018] Figure 1 This is a top view of the driving device in an embodiment of the present invention, at a certain moment; Figure 2 This is a top view of the driving device in an embodiment of the present invention, at two different times; Figure 3 This is a top view of the driving device in an embodiment of the present invention, showing three moments; Figure 4 This is a top view of the driving device in an embodiment of the present invention, at four different times; Figure 5 This is a top view of the driving device in an embodiment of the present invention, at time five; Figure 6 This is a top view of the driving device in an embodiment of the present invention, at time six; Figure 7 This is a side sectional view of the driving device in an embodiment of this utility model; Figure 8 yes Figure 1 A magnified view of a portion of the image; Figure 9 This is a schematic diagram of the movement trajectory of the eccentric drive component; Figure 10 This shows the position of the eccentric drive at a given moment. Figure 11 The positions of the eccentric drive component at two time points are shown; Figure 12 The positions of the eccentric drive are shown at three time points; Figure 13 The positions of the eccentric drive are shown at four time points; Figure 14 The position of the eccentric drive is shown at time five; Figure 15 The position of the eccentric drive is shown at six time points; Figure label: 100-Drive device; 1-First rod; 102-Drive plate; 102a-1-Mounting groove; 11-Slider; 2-Second rod; 21-Elastic element; 31-First bearing stop arm; 3-Third rod; 4-Fourth rod; 41-Second bearing stop arm; 51-Eccentric drive element; 52-Power source; 53-Eccentric shaft; 6-Stop; 61-Limiting post; 62-Stop groove; 7-Protrusion; 71-First abutment pin; 72-Second abutment pin; 8-Base plate; 81-Slide rail; 91-First sensor; 92-Second sensor; 101-Twisted wire; 101a-Tail end; 101b-Head end; 103-Connector; 200-Probe module; 201-Probe component; 202-Twisted wire fixing block; 202a-First sidewall; 300-Adjusting component; 301-Adjusting block; 301a-Block body; 301b-Connecting plate; 301b-1-Oval hole; 301b-2-Arc groove; 303-First fastener; L1-Reference rotation axis; R1-Reference circle; R1-1-First arc trajectory; R1-2-Second arc trajectory; R1-3-Third arc trajectory; R1-4-Fourth arc trajectory; S1-First reference line; S2-Second reference line. Detailed Implementation

[0019] This invention provides a driving device for a thromboelastography detection apparatus that can reduce or minimize vibration caused by the driving device rotating the sample cup or probe module, thereby improving the stability of the drive and the accuracy of the thromboelastography detection apparatus.

[0020] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0022] In the field of medical testing, thromboelastography (TEG) is an important medical device widely used to assess blood coagulation function, monitor the effectiveness of anticoagulation therapy, and diagnose hemorrhagic diseases. During operation, a drive mechanism provides the driving force to enable the sample cup or probe module to perform a reciprocating rotation at a specific angle (e.g., 4.75°), thereby simulating the flow of blood within the body and allowing for precise measurement of blood coagulation characteristics.

[0023] Currently, most commercially available thromboelastography (TEG) instruments use a motor-driven cam transmission mechanism to achieve the reciprocating rotation of the sample cup. The working principle of this mechanism is as follows: the drive motor is directly connected to the cam, driving the cam to perform circular motion. The cam's periphery maintains close contact with the side of the drive plate. When the cam rotates, its changing shape pushes the drive plate, causing it to reciprocate, ultimately achieving a 4.75° reciprocating rotation of the sample cup. However, this driving method results in additional vibration, which can interfere with the normal operation of the testing components. For example, the sensor may generate false signals due to vibration, leading to deviations in the measurement data.

[0024] In traditional technical solutions, the contact and relative movement between the cam and the drive plate during operation of the cam transmission mechanism inevitably generates significant friction and impact forces, leading to vibration. Specifically, in existing technologies, the periphery of the cam is in close contact with the side of the drive plate, using friction to convert the circumferential rotation of the drive motor into a 4.75° reciprocating rotation. Due to this direct contact, vibration is generated during friction. This vibration is not only transmitted through the drive mechanism itself but also further transmitted to the testing components of the thromboelastography instrument, such as sensors and detection probes.

[0025] Vibration has a significant impact on the stability of thromboelastography. On the one hand, vibration can cause changes in the relative positions between the drive mechanism and the test components, making it difficult to precisely control the rotation angle of the sample cup, thus affecting the stability and reliability of the detection process. On the other hand, vibration can also interfere with the normal operation of the test components; for example, the sensor may generate false signals due to vibration, leading to deviations in the measurement data.

[0026] Please refer to Figures 1 to 15 As shown, Figure 1 This is a top view of the driving device in an embodiment of the present invention, at a certain moment; Figure 2 This is a top view of the driving device in an embodiment of the present invention, at two different times; Figure 3 This is a top view of the driving device in an embodiment of the present invention, showing three moments; Figure 4 This is a top view of the driving device in an embodiment of the present invention, at four different times; Figure 5 This is a top view of the driving device in an embodiment of the present invention, at time five; Figure 6 This is a top view of the driving device in an embodiment of the present invention, at time six; Figure 7 This is a side sectional view of the driving device in an embodiment of this utility model; Figure 8 yes Figure 1 A magnified view of a portion of the image; Figure 9 This is a schematic diagram of the movement trajectory of the eccentric drive component; Figure 10 This shows the position of the eccentric drive at a given moment. Figure 11 The positions of the eccentric drive component at two time points are shown; Figure 12 The positions of the eccentric drive are shown at three time points; Figure 13 The positions of the eccentric drive are shown at four time points; Figure 14 The position of the eccentric drive is shown at time five; Figure 15 The position of the eccentric drive is shown at time six.

[0027] This utility model provides a driving device 100 for a thromboelastography detection device. The driving device 100 includes a base plate 8, a cam linkage mechanism disposed on the base plate 8, and an eccentric driving member 51. The base plate 8 is provided with a stop 6 and a protrusion 7. The cam linkage mechanism includes a first rod 1 disposed opposite to the base plate 8 and a second rod 2 with elasticity. The first rod 1 can move relative to the base plate 8 and is limited by the stop 6 to two end positions, namely the first end position and the second end position.

[0028] The eccentric drive member 51 is adapted to the second rod 2 to alternately abut against and drive one of the oppositely arranged third rod 3 and fourth rod 4 to rotate, while the other is pressed against the protrusion 7 by the action of the second rod 2 and separated from the eccentric drive member 51.

[0029] In such Figures 1 to 6 In the example shown, Figure 1 This is a top view of the driving device in an embodiment of the present invention, at a certain moment; Figure 2 This is a top view of the driving device in an embodiment of the present invention, at two different times; Figure 3 This is a top view of the driving device in an embodiment of the present invention, showing three moments; Figure 4 This is a top view of the driving device in an embodiment of the present invention, at four different times; Figure 5 This is a top view of the driving device in an embodiment of the present invention, at time five; Figure 6 This is a top view of the driving device in an embodiment of this utility model, at time six.

[0030] The substrate 8 is arranged horizontally, and the substrate 8 and the first rod 1 are slidably adapted to each other via a slide rail 81 and a slider 11. Specifically, the substrate 8 is provided with a slide rail 81, which extends in a straight line along a first direction, and the bottom of the first rod 1 is fixedly connected to a slider 11, thereby adapting to the slide rail 81.

[0031] The stop 6 includes a limiting post 61 and a stop groove 62. The stop groove 62 is disposed on the first rod 1 and extends vertically through the first rod 1. The limiting post 61 is disposed on the substrate 8 and is partially inserted into the stop groove 62. When the first rod 1 moves relative to the substrate 8 to the first end position and the second end position, the limiting post 61 can move within the stop groove 62 and form a limiting engagement with the stop groove 62.

[0032] The driving device 100 includes a driving plate 102, which serves as a first lever 1. The driving plate 102 is adapted to the substrate 8 and can move linearly between two endpoints along a first direction. It can move between the first endpoint position and the second endpoint position.

[0033] The drive unit 100 includes a cam linkage mechanism, which includes a drive plate 102 and two bearing stops hinged to the drive plate 102. The bottom ends of the two bearing stops are connected to elastic members 21.

[0034] The elastic element 21 serves as the second lever 2, and the two bearing stops are the first bearing stop 31 and the second bearing stop 41, respectively. The first bearing stop 31 serves as the third lever 3, and the second bearing stop 41 serves as the fourth lever 4. The first bearing stop 31 and the second bearing stop 41 have parallel rotation axes, which are perpendicular to the drive plate 102.

[0035] The first bearing stop arm 31, the second bearing stop arm 41, the drive plate 102 and the elastic member 21 form a receiving area. An eccentric drive member 51 is provided in the receiving area. The eccentric drive member 51 can rotate around the reference rotation axis L1 in the receiving area. The reference rotation axis L1 is perpendicular to the plane where the drive plate 102 is located.

[0036] In other implementations, such as Figure 7 As shown, Figure 7 This is a side sectional view of the driving device in an embodiment of this utility model. The driving device 100 also includes a power source 52, which can be a motor. It also includes an eccentric shaft 53 connected to the power source 52. The power source 52 is a stepper motor, which is fixed on the base and performs circular motion to provide power to the driving mechanism.

[0037] An eccentric shaft 53 is fitted with a drive roller, which rotates around the central axis of the eccentric shaft 53, which is perpendicular to the substrate 8.

[0038] The central axis of the eccentric shaft 53 serves as the reference rotation axis L1. The eccentric drive member 51 has an inner ring and an outer ring that can rotate relative to the inner ring, with the inner ring fixedly connected to the power output end of the power source 52. This allows the eccentric drive member 51 to rotate along the reference circle R1.

[0039] In other words, the drive roller rotates along the reference circle R1; the third rod 3 and the fourth rod 4 are projected in a direction perpendicular to the substrate 8 to form a first projection and a second projection spaced apart, the first projection covering the reference circle R1 and the second projection covering the reference circle R1. Thus, the rotational motion of the eccentric drive member 51 can be converted into the linear motion of the first rod 1.

[0040] In this way, when the eccentric drive 51 is in contact with one side of the third rod 3 and the fourth rod 4, the traditional sliding friction can be replaced by rolling friction, thereby further reducing the friction force.

[0041] Within the accommodating area, a first abutment 71 and a second abutment 72 are symmetrically arranged. The first abutment 71 is used to engage with the first bearing stop arm 31 to prevent rotation, and the second abutment 72 is used to engage with the second bearing stop arm 41 to prevent rotation. The first abutment 71 and the second abutment 72 together serve as the aforementioned protrusion 7. Of course, in addition to providing two abutments, a strip-shaped protrusion 7 can also be provided, with both ends of the protrusion 7 serving as limiting ends.

[0042] By employing a planar cam linkage mechanism to drive the sample cup or probe module 200 to reciprocate, the first rod 1 serves as the power output end of the planar cam linkage mechanism, the third rod 3 and the fourth rod 4 are adapted to the eccentric drive component 51 as a transmission mechanism, and the second rod 2 is an elastic component 21, which can buffer the small vibrations formed during the unilateral contact between the eccentric drive component 51 and the third rod 3 and the fourth rod 4, and prevent the vibration from being transmitted from the first rod 1 to the sample cup and probe module 200. This reduces or lowers the vibration caused by the drive device 100 driving the sample cup or probe module 200 to rotate, improves the stability of the drive, and improves the accuracy of the thromboelastography detection device.

[0043] Furthermore, the linear movement method can achieve consistency in the movement amplitude of each point on its movement trajectory, thus enabling the connection of multiple sample cups or probe modules 200 to the first rod 1 to achieve consistent movement.

[0044] In the aforementioned technical solutions, both the protrusion 7 and the eccentric drive member 51 are located inside the cam linkage mechanism, and the eccentric drive member 51 is located between the protrusion 7 and the first rod 1. This distribution method can reduce the space occupied by the drive device 100.

[0045] There is a midpoint between the two endpoints, at which both the third rod 3 and the fourth rod 4 are limited by the protrusion 7. This allows the midpoint to be restricted by the protrusion 7. At the midpoint, the third rod 3 is parallel to the fourth rod 4 and perpendicular to the first rod 1.

[0046] A thromboelastography device includes a probe module 200, a twisted wire 101, and a drive device 100. One end of the twisted wire 101 is connected to a first rod 1, and the other end is connected to the probe module 200. Thus, the first rod 1 can drive the probe module 200 to move. The specific operation of the thromboelastography device of this application will be described below with reference to the accompanying drawings.

[0047] In the technical solution of this application, the first lever 1 has a driving mode and a holding mode. When the driving plate 102 is in the holding mode, the driving plate 102 can be held at the first end position and the second end position; when the driving plate 102 is in the driving mode, it can move from the first end position to the second end position. The driving mode and the holding mode alternate cyclically.

[0048] Specifically, as the eccentric drive unit 51 completes one revolution along the reference circle R1, the drive plate 102 first enters the drive mode. At this time, it will move from the first endpoint position to the second endpoint position within a first set time interval. Then, the drive plate 102 switches from the drive mode to the holding mode. At this time, it will remain at the second endpoint position within a second set time interval.

[0049] After the second set time is reached, the drive board 102 will switch from the holding mode to the driving mode. At this time, it will be reset from the second endpoint to the first endpoint within the third set time. Finally, it will enter the holding mode from the driving mode and remain at the first endpoint after the fourth set time.

[0050] In this way, the drive plate 102 can pull the probe component 201 to complete one full rotation by the twisting wire 101. By continuously cycling between the drive mode and the holding mode, the drive plate 102 can drive the probe module 200 to rotate back and forth.

[0051] The following description, using the trajectory of reference circle R1 as an example and in conjunction with the foregoing explanation, will further illustrate the operation of the drive device 100 of this application.

[0052] like Figure 9 As shown, Figure 9 This is a schematic diagram of the movement trajectory of the eccentric drive component. The reference circle R1 includes a first arc trajectory R1-1, a second arc trajectory R1-2, a third arc trajectory R1-3, and a fourth arc trajectory R1-4 arranged sequentially along the circumference. The first arc trajectory R1-1, the second arc trajectory R1-2, the third arc trajectory R1-3, and the fourth arc trajectory R1-4 are connected end to end to form a closed circumference.

[0053] In this embodiment, the first arc trajectory R1-1 and the third arc trajectory R1-3 pass through the same angle of the circumference, thus having the same length in the circumferential direction. Similarly, the second arc trajectory R1-2 and the fourth arc trajectory R1-4 pass through the same angle of the circumference, thus having the same length in the circumferential direction.

[0054] The first arc trajectory R1-1, the second arc trajectory R1-2, the third arc trajectory R1-3, and the fourth arc trajectory R1-4 correspond one-to-one with the aforementioned first set time, second set time, third set time, and fourth set time, respectively. Those skilled in the art can control the length of the corresponding set time by adjusting the speed at which the eccentric drive member 51 rotates around the reference rotation axis L1, thereby achieving the duration corresponding to the drive plate 102 in the driving and holding states.

[0055] For example, if the duration of the first set time and the third set time is 1 second, then the length of the first arc trajectory R1-1 can be set according to the rotation speed of the eccentric drive component 51, and the rotation speed of the eccentric drive component 51 can be adjusted according to the length of the first arc trajectory R1-1 so that the drive plate 102 can move to the first end position and the second end position in 1 second.

[0056] The duration of the third and fourth set times is 10 seconds. Therefore, the length of the third arc trajectory R1-3 can be set according to the rotational speed of the eccentric drive component 51, and the rotational speed of the eccentric drive component 51 can also be adjusted according to the length of the third arc trajectory R1-3.

[0057] It is understandable that the midpoint is the midpoint between the first endpoint and the second endpoint. When the drive board 102 is in driving mode, it will pass through the midpoint during the movement from the first endpoint to the second endpoint, and the time taken to pass through the midpoint corresponds to the midpoint of the first set time duration. Conversely, it will pass through the midpoint during the movement from the second endpoint to the first endpoint. In the example shown in the figure, the line connecting the midpoint of the first arc trajectory R1-1 and the midpoint of the third arc trajectory R1-3 is the first reference line S1. The first reference line S1 passes through the center of the reference circle R1, and the point where the first reference line S1 intersects the reference circle R1 corresponds to the aforementioned midpoint.

[0058] In such Figure 9 In the example shown, the first reference line S1 is perpendicular to the direction in which the drive plate 102 moves in a straight line, that is, perpendicular to the first direction. The line connecting the midpoint of the second arc trajectory R1-2 and the midpoint of the fourth arc trajectory R1-4 serves as the second reference line S2. The second reference line S2 passes through the center of the reference circle R1, extends along the first direction, and is perpendicular to the first reference line S1.

[0059] Point A22 is the point where the first arc trajectory R1-1 connects with the second arc trajectory R1-2. Point A41 is the point where the third arc trajectory R1-3 connects with the fourth arc trajectory R1-4. Point A42 is the point where the third arc trajectory R1-3 connects with the second arc trajectory R1-2. Points A21 and A22 both correspond to the second endpoint position, and points A41 and A42 both correspond to the first endpoint position.

[0060] like Figure 1 As shown, Figure 1 This is a top view of the driving device in an embodiment of the present invention, at a certain moment; Figure 1 This is the initial state of the drive device 100, and also the starting point for the rotation of the eccentric drive member 51. At this time, the eccentric drive member 51 is not in contact with the second rod 2 and the third rod 3. The second rod 2 and the third rod 3 are perpendicular to the first rod 1, that is, the first rod 1 (drive plate 102) is at the midpoint. In the example shown in the figure, the eccentric drive member 51 is located at the midpoint of the first reference arc trajectory. Under the action of the elastic member 21, the first bearing stop arm 31 presses against the side of the first abutment 71 away from the first abutment 71, and the second bearing stop arm 41 presses against the side of the second abutment 72 away from the first abutment 71.

[0061] like Figure 2 As shown, Figure 2 This is a top view of the driving device in this embodiment of the present invention, at time two. After the driving device 100 starts working, the power source 52 (stepper motor) starts, and the eccentric driving member 51 rotates clockwise around the reference rotation axis L1 under the drive of the eccentric shaft 53. Specifically, the eccentric driving member 51 rotates from the midpoint of the first arc trajectory R1-1 to point A22. During this process, the eccentric driving member 51 contacts the inner wall of the first bearing stop arm 31. As the eccentric driving member 51 rotates further, it can drive the first bearing stop arm 31 to rotate outward from the initial position by a certain angle. During this process, it can drive the driving plate 102 to move to the left until the limiting post 61 abuts against the rightmost side of the stop groove 62, and then the driving plate 102 reaches the second endpoint position.

[0062] As an alternative example, a first sensor 91 is provided on the outer side of the first bearing stop arm 31 as a trigger to determine that the first bearing stop arm 31 is in position. When the drive plate 102 reaches the second end position, the first bearing stop arm 31 triggers the first sensor 91.

[0063] like Figure 3 As shown, Figure 3This is a top view of the driving device in this embodiment of the present invention, at time three: The stepper motor continues to rotate, and the eccentric drive member 51 rotates from point A22 to point A21, that is, the eccentric drive shaft begins to move on the second arc-shaped trajectory R1-2. At this time, because the limiting post 61 and the rightmost side of the stop groove 62 abut against the drive plate 102 and remain stationary, the second bearing stop arm 41 is stopped by the second abutment pin 72 to fix one end of the elastic member 21. As the stepper motor continues to rotate, the first bearing stop arm 31 rotates further outward, thereby pulling the other end of the elastic member 21 to drive the elastic member 21 to elongate and deform. When the first bearing stop arm 31 moves to the midpoint of the second arc-shaped trajectory R1-2, the first bearing stop arm 31 rotates outward to its limit position.

[0064] like Figure 4 As shown, Figure 4 This is a top view of the driving device in this embodiment of the present invention, at time four; the eccentric driving member 51 continues to rotate from the midpoint of the second arc-shaped trajectory R1-2 toward point A21 until it reaches point A21. At this time, the first bearing stop arm 31 gradually returns to its original position from the outermost limit position, and the deformation of the elastic member 21 gradually decreases. As the eccentric driving member 51 continues to rotate toward point A41 after reaching point A21, the limiting post 61 begins to leave the rightmost side of the stop groove 62, and the driving plate 102 moves to the right to the midpoint position.

[0065] like Figure 5 As shown, Figure 5 This is a top view of the driving device in this embodiment of the present invention, at time five. As the eccentric driving member 51 continues to move towards point A41 along the third arc trajectory R1-3, the eccentric driving member 51 contacts the second bearing stop arm 41 and disengages from the first bearing stop arm 31, consistent with the aforementioned content. Under the drive of the eccentric driving member 51, the second bearing stop arm 41 swings outward, and under the action of the elastic member 21, the first bearing stop arm 31 stops with the first abutment pin 71. Under the tension of the elastic member 21, the driving plate 102 continues to move to the right from the midpoint to the first end point. The limiting post 61 stops with the rightmost side of the stop groove 62, and the driving plate 102 ends the driving condition and begins to enter the holding condition.

[0066] Similarly, a second sensor 92 is provided on the outside of the second bearing stop arm 41. The second sensor 92 is triggered after the drive plate 102 ends the drive operation.

[0067] like Figure 6 As shown, Figure 6This is a top view of the drive device in this embodiment of the present invention, at time six; as the second bearing stop arm 41 rotates further outward, the first bearing stop arm 31 is stopped by the first abutment pin 71 to provide a fixed end for the elastic member 21, and the elastic member 21 is stretched by the second bearing stop arm 41. At this time, the drive plate 102 remains stationary. After the elastic member 21 is stretched to its maximum length, it begins to retract with the swing of the second bearing stop arm 41.

[0068] Then as Figure 1 As shown, with another cycle of rotation of the eccentric drive component 51, the limiting post 61 of the drive plate 102 will separate from the stop groove 62 and move to the left to the center position to complete one cycle of the eccentric drive component 51. Then the above state is repeated to drive the probe module 200 to swing back and forth.

[0069] In the aforementioned embodiments, the first rod 1 is provided with a plurality of connectors 103, which are spaced apart along the extending direction of the first rod 1. The connectors 103 are used to connect to the twisted wire 101. In this way, multiple probe modules 200 can be connected to the first rod 1, improving testing efficiency and reducing testing costs.

[0070] The probe module 200 includes a probe element 201 arranged vertically and a twisted wire 101 fixing block fixedly connected to the top end of the probe element 201. Specifically, the top end of the probe element 201 is inserted axially into the twisted wire 101 fixing block, and a locking bolt is also provided in the twisted wire 101 fixing block, which can lock the probe element 201 along the probe element 201.

[0071] The twisted wire 101 extends along the radial surface of the probe 201. The first end 101b of the twisted wire 101 is magnetically connected to the connector 103, and the last end 101a of the twisted wire 101 is fixedly connected to the twisted wire 101 fixing block. The drive plate 102 moves repeatedly between two points along a straight line in a first direction to drag the twisted wire 101 and pull the twisted wire 101 fixing block, thereby driving the probe 201 to rotate. In this embodiment, the twisted wire 101 extends radially along the probe 201, rather than axially. The drive plate 102 also moves linearly along the radial surface of the probe 201.

[0072] The connector 103 is magnetic, and the twisted wire 101 can be attracted to the connector 103. The connector 103 is cylindrical, and under the drive of the drive unit, the connector 103 can reciprocate along the first direction. The twisted wire 101 can swing relative to the connector 103, and its head end 101b is always tangent to the side wall of the connector 103.

[0073] The drive plate 102 has a mounting groove 102a-1 extending along a first direction. The drive plate 102 has an upper surface, a portion of which is recessed to form the mounting groove 102a-1. The connector 103 is connected to the mounting groove 102a-1 via an adjusting assembly 300. The mounting groove 102a-1 serves to position the connector 103. By providing the adjusting assembly 300, the connector 103 can be positioned at different locations within the mounting groove 102a-1.

[0074] Multiple spaced connectors 103 are provided within the mounting slot 102a-1. This significantly improves the testing efficiency of the thromboelastography instrument. Of course, only one connector 103 can be provided; those skilled in the art can choose accordingly.

[0075] The adjustment assembly 300 includes an adjustment block 301 and a first fastener 303. Along a first direction, one end of the adjustment block 301 has an oblong hole, and the first fastener 303 is adapted to fit the oblong hole. Along the first direction, the adjustment block 301 includes a block body 301a and a connecting plate 301b extending outward from the bottom of the block body 301a. The oblong hole is formed in the connecting plate 301b and passes through the connecting plate 301b along the axial direction of the probe member 201.

[0076] A slot is formed on the side wall of the connecting plate 301b away from the block body 301a to facilitate the insertion of the first fastener 303. The first fastener 303 is a screw that can be threaded into the bottom of the mounting groove 102a-1. During adjustment, the position of the first fastener 303 relative to the oblong hole 301b-1 can be adjusted. Thus, the position of the block body 301a can be finely adjusted within the range extended by the oblong hole 301b-1 in the first direction.

[0077] The other end of the adjusting block 301 is fixedly connected to the connector 103. By providing the oblong hole, the position of each connector 103 can be further fine-tuned.

[0078] Specifically, the block body 301a has an arc-shaped groove 301b-2 on the side away from the connecting plate 301b in the first direction. The arc-shaped groove 301b-2 penetrates the block body 301a axially, and the groove opening is located on the side wall of the block body 301a opposite to the connecting plate 301b in the first direction. The groove wall is arc-shaped, and part of the connector 103 is located in the arc-shaped groove 301b-2, while part extends out of the arc-shaped groove 301b-2. By setting the arc-shaped groove 301b-2 to fix the connector 103 in a conformal manner, the cost can be significantly reduced.

[0079] This application employs a drive device 100 and a cam-linkage mechanism disposed on the plane of the substrate 8. The cam-linkage mechanism includes a first link 1, a second link 2, a third link 3, and a fourth link 4 connected sequentially. The first link 1 is configured to reciprocate between a first endpoint and a second endpoint along a straight line in a first direction, with the midpoint located between the first and second endpoints. The fourth link 4 is elastic. An anti-rotation member is disposed inside the cam-linkage mechanism, which can be supported between the second link 2 and the third link 3 to drive the drive plate 102 to the midpoint.

[0080] An eccentric drive member 51 is provided inside the cam linkage mechanism. While rotating around the central axis of its roller body, the eccentric drive member 51 can also rotate around the reference circle R1 under the drive of an external force. The eccentric drive member 51 is eccentrically set with the reference circle R1. The central axis of the roller body is parallel to the first reference axis and perpendicular to the first plane.

[0081] The second rod 2 and the third rod 3 are projected along a direction perpendicular to the first plane to form a first projection and a second projection. The first projection covers a reference circle R1, and the second projection covers a reference circle R1.

[0082] The eccentric drive 51 cycles between driving and holding modes. The eccentric drive 51 drives one of the second rod 2 and the third rod 3 to deflect, while the other rod can disengage from the eccentric drive 51.

[0083] Compared with existing technologies, its advantages are: First, a planar cam linkage mechanism is used to drive the sample cup or probe module 200 to rotate reciprocally. The first rod 1 serves as the power output end of the planar cam linkage mechanism, the third rod 3 and the fourth rod 4 are adapted to the eccentric drive component 51 as a transmission mechanism, and the second rod 2 is an elastic component 21, which can buffer the small vibrations formed during the unilateral contact between the eccentric drive component 51 and the third rod 3 and the fourth rod 4, and prevent the vibration from being transmitted from the first rod 1 to the sample cup and probe module 200. This reduces or lowers the vibration caused by the drive device 100 driving the sample cup or probe module 200 to rotate, improves the stability of the drive, and improves the accuracy of the thromboelastography detection device.

[0084] Secondly, when the eccentric drive component 51 is in contact with one side of the third rod 3 and the fourth rod 4, the traditional sliding friction can be replaced by rolling friction, which can further reduce the friction force.

[0085] Third, the linear movement method can achieve consistency in the movement amplitude of each point on its movement trajectory. This allows multiple sample cups or probe modules 200 connected to the first rod 1 to achieve consistent movement, significantly reducing costs.

[0086] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A driving device (100) for a thromboelastography detection apparatus, characterized in that, The system includes a base plate (8), a cam linkage mechanism disposed on the base plate (8), and an eccentric drive member (51). The base plate (8) is provided with a stop (6) and a protrusion (7). The cam linkage mechanism includes a first rod (1) disposed opposite to the base plate (8) and a second rod (2) with elasticity. The first rod (1) can move relative to the base plate (8) and is limited to two end positions by the stop (6). The eccentric drive member (51) is adapted to the second rod (2) to alternately abut against and drive one of the oppositely arranged third rod (3) and fourth rod (4) to rotate, while the other is pressed against the protrusion (7) by the action of the second rod (2) and separated from the eccentric drive member (51).

2. The driving device (100) for the thromboelastography detection apparatus according to claim 1, characterized in that, It also includes a power source (52), the eccentric drive (51) having an inner ring and an outer ring that can rotate relative to the inner ring, the inner ring being fixedly connected to the power output end of the power source (52).

3. The driving device (100) for the thromboelastography detection apparatus according to claim 2, characterized in that, It also includes an eccentric shaft (53) connected to the power source (52); the eccentric shaft (53) is fitted with the eccentric drive member (51), and the eccentric drive member (51) rotates around the central axis of the eccentric shaft (53); the central axis of the eccentric shaft (53) is perpendicular to the substrate (8).

4. The driving device (100) for the thromboelastography detection apparatus according to claim 1, characterized in that, The first rod (1) is slidably adapted to the substrate (8) and can move in a straight line along a first direction between the two endpoints.

5. The driving device (100) for the thromboelastography detection apparatus according to claim 1, characterized in that, There is a midpoint between the two endpoints, at which the third rod (3) and the fourth rod (4) are both located at the midpoint by the protrusion (7).

6. The driving device (100) for the thromboelastography detection apparatus according to claim 1, characterized in that, The protrusion (7) and the eccentric drive member (51) are both located inside the cam linkage mechanism, and the eccentric drive member (51) is located between the protrusion (7) and the first rod (1).

7. The driving device (100) for the thromboelastography detection apparatus according to claim 5, characterized in that, The drive roller rotates along the reference circle (R1); The third rod (3) and the fourth rod (4) are projected in a direction perpendicular to the substrate (8) to form a first projection and a second projection spaced apart from each other. The first projection covers a portion of the reference circle (R1), and the second projection covers a portion of the reference circle (R1).

8. The driving device (100) for the thromboelastography detection apparatus according to claim 5, characterized in that, At the midpoint, the third rod (3) is parallel to the fourth rod (4) and both are perpendicular to the first rod (1).

9. A thromboelastography instrument, characterized in that, It includes a probe module (200), a twisted wire (101), and a driving device (100) according to any one of claims 1-8, wherein one end of the twisted wire (101) is connected to the first rod (1), and the other end is connected to the probe module (200).

10. The thromboelastography instrument according to claim 9, characterized in that, The first rod (1) is provided with a plurality of connectors (103), which are spaced apart along the extension direction of the first rod (1) and are used to connect with the twisted wire (101).

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