A semi-automatic thromboelastography instrument

Abstract

The present invention belongs to the field of medical equipment technology, and more particularly relates to a semi-automatic thromboelastograph, comprising a control device, a detection mechanism, a cup placement mechanism, an actuator, and a timing drive mechanism. The control device controls the operating states of the electrical components in the detection mechanism, the cup placement mechanism, the actuator, and the timing drive mechanism. The cup placement mechanism places and positions a reaction cup via a channel module and rotates the reaction cup via a rotation module. The actuator controls the raising and lowering of the cup placement mechanism, raising the reaction cup placed on the cup placement mechanism to a hanging needle in the detection mechanism. The hanging needle is inserted into the reaction cup, and the coagulation changes of the blood sample in the reaction cup are detected by a detection unit. After the detection mechanism completes the detection, the timing drive mechanism lifts the hanging wire in the detection mechanism, placing the hanging wire in a free protection state. The present invention can solve the problems of existing thromboelastograph devices, such as the complex structure of the improved device and the inability to maintain long-term detection accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical equipment, and in particular relates to a semi-automatic thromboelastogram. Background Art

[0002] Thromboelastograph is an analyzer that monitors the coagulation process from the entire dynamic process of platelet aggregation, coagulation, fibrinolysis, etc. It is mainly used to monitor and analyze the coagulation state of blood samples, so as to play an auxiliary role in assessing the patient's clinical hemostasis symptoms.

[0003] Most of the thrombelastograms currently on the market require the operator to participate in the entire process during actual use. The movements are cumbersome and prone to errors. Some errors may lead to very poor experimental results. Especially in some grassroots medical institutions such as townships, the operating capabilities of operators are generally not high. Even after training, they are prone to errors when operating some equipment that requires high operator participation.

[0004] In order to solve the above problems, for the existing thrombelastograph, one method is to replace the suspended needle with magnetic suspension plus algorithm correction, and the other is to simulate the operator's toggling of the lever. The first method cannot avoid the problem of gradually increasing errors caused by magnetic attenuation, and the structure of the second method is very complicated. Therefore, it is necessary to improve the problems in the above two methods and propose a thrombelastograph with a simple structure, easy operation, and long-term stable detection accuracy. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a semi-automatic thrombelastograph to solve the problems of the existing thrombelastograph equipment in that the improved structure is complex and the detection accuracy cannot be stabilized for a long time.

[0006] The basic solution provided by the present invention is: a semi-automatic thromboelastograph, comprising a shell, wherein the shell comprises a control device, a detection mechanism, a cup placing mechanism, an actuator and a timing drive mechanism, the control device comprising a controller, and the actuator, cup placing mechanism, detection mechanism and timing drive mechanism are all electrically connected to the controller; the detection mechanism comprises a suspension wire, a suspension needle, an upper slider, a lower slider and a detection unit, one end of the suspension wire is fixed with a suspension needle seat, the other end of the suspension needle seat is fixedly connected to the suspension needle, the upper slider is connected to the bottom of the suspension needle seat, the lower slider is located below the upper slider, the timing drive mechanism is located between the upper slider and the lower slider, and under the control of the controller, the timing drive mechanism pushes the upper slider to lift the suspension needle seat to put the suspension wire in a free state, and the timing drive mechanism is also used to push the lower slider downward; the detection unit is used to generate a thromboelastograph by rotating the suspension needle;

[0007] The cup placing mechanism is located below the detection mechanism, and the cup placing mechanism places the reaction cup; the execution mechanism controls the cup placing mechanism to perform lifting actions under the control of the controller.

[0008] Furthermore, the detection mechanism also includes a suspension wire seat, a clamping block and a clamping plate. The suspension wire seat is hollow inside and has a V-shaped bayonet on the top. The other end of the suspension wire passes through the suspension wire seat and is connected to the clamping block. The clamping block is placed in the V-shaped bayonet. The clamping plate is located between the suspension wire seat and the suspension needle seat to clamp the suspension wire.

[0009] The upper slider and the lower slider are hollow inside, and sliding grooves are provided on opposite sides. The lower slider is T-shaped, and the hanging needle passes through the upper slider and the lower slider.

[0010] Furthermore, the detection unit includes an upper magnet, a lower magnet and a circuit board, the upper magnet and the lower magnet are fixed on the outside of the suspended needle seat, and the circuit board is located between the upper magnet and the lower magnet and does not move with the suspended needle seat.

[0011] Furthermore, the timing drive mechanism includes a drive block, a motor 1 and a screw 1. The interior of the drive block is hollow and the top and bottom surfaces are provided with protrusions that cooperate with the slide groove. The protrusions include a front convexity and a rear convexity. The height of the rear convexity is greater than the height of the front convexity, and the front convexity and the rear convexity are smoothly connected; the suspension needle passes through the hollow part inside the drive block, and one end of the screw 1 is connected to the drive block, and the other end is connected to the drive shaft of motor 1.

[0012] Furthermore, the cup placement mechanism includes a channel module, a channel bracket, a heat preservation cover and a rotation module. The channel module includes a cup placement seat, in which the reaction cup is placed. The channel bracket is connected to the channel module, the heat preservation cover is fixed to the outside of the channel module, and the rotation module is fixedly connected to the cup placement seat in the channel module.

[0013] Furthermore, the rotation module includes a rotation bracket, a rotation rod, a rocking arm, a brushless motor and a cam. One end of the rotation bracket is connected to the cup holder, and the other end is provided with a through hole. One end of the rotation rod passes through the through hole and is fixed to the rotation bracket, and the other end is fixedly connected to the middle section of the rocking arm. One end of the rocking arm is rotatably connected to the mounting bottom surface, and the other end is provided with a collision block.

[0014] The cam includes a direct-driven wheel and a driven wheel. The direct-driven wheel is eccentrically connected to the driving shaft of the brushless motor. The driven wheel contacts the circumference of the direct-driven wheel. The collision block at one end of the rocking arm contacts the driven wheel.

[0015] Note: The installation bottom surface is the upper surface of the base of the device.

[0016] Furthermore, the actuator includes motor 2, screw 2, mounting seat, slide rail 1 and slider 1. Screw 2 is connected to motor 2, slider 1 is installed on slide rail 1, the mounting seat is fixed on slider 1 and connected to screw 2, and the channel bracket of the cup placement mechanism is fixedly connected to the mounting seat.

[0017] Furthermore, the control device also includes a display screen and control buttons, and the display screen and control buttons are electrically connected to the controller. The display screen is used to display the thromboelastogram, and the controller is used to control the operating status of the detection mechanism, cup placement mechanism, actuator and timing drive mechanism by controlling the control buttons.

[0018] The principles and advantages of the present invention are as follows: the semi-automatic thrombelastograph of the present application includes a control device, a detection mechanism, a cup placement mechanism, an actuator, and a sequential drive mechanism. The control device controls the operating states of the electrical components in the detection mechanism, cup placement mechanism, actuator, and sequential drive mechanism. Specifically, the cup placement mechanism places and positions the reaction cup through the channel module, and rotates the reaction cup through the rotation module to facilitate detection. The cup placement mechanism controls the positioning and rotation of the reaction cup, and the actuator controls the raising and lowering of the cup placement mechanism, raising the reaction cup placed on the cup placement mechanism to the suspension needle in the detection mechanism. The suspension needle is inserted into the reaction cup, and the coagulation changes of the blood sample in the reaction cup are detected by the detection unit. After the detection mechanism completes the detection, the sequential drive mechanism lifts the suspension wire in the detection mechanism, placing the suspension wire in a free protection state, reducing the operator's manual lifting steps of the suspension wire. Unlike the existing method of protecting the suspension wire by magnetic levitation, the sequential drive mechanism of the present application for protecting the suspension wire is a mechanical structure with a long service life and precise control, which can effectively reduce the time it takes for the thrombelastograph to be returned to the factory for repair.

[0019] Therefore, the semi-automatic thromboelastograph of the present invention can save labor costs, reduce the ability requirements for operators, and the detection accuracy can be stable over a long period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the external structure of an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the structure of an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the cup placing mechanism according to an embodiment of the present invention Figure 1 ;

[0023] Figure 4 Schematic diagram of the cup placing mechanism according to an embodiment of the present invention Figure 2 ;

[0024] Figure 5Schematic diagram of an actuator according to an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the structure of the detection mechanism and the timing drive mechanism of an embodiment of the present invention;

[0026] Figure 7 A schematic plan view of a detection mechanism according to an embodiment of the present invention;

[0027] Figure 8A Schematic diagram A of the operation of the timing drive mechanism and the detection mechanism according to an embodiment of the present invention;

[0028] Figure 8B Schematic diagram B of the operation of the timing drive mechanism and the detection mechanism according to an embodiment of the present invention;

[0029] Figure 8C FIG. 3 is an action diagram C of the timing drive mechanism and the detection mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following is further described in detail through specific implementation methods:

[0031] : The marks in the drawings of the specification include: shell 1, display screen 101, detection mechanism 2, suspension wire 201, suspension needle 202, suspension wire seat 203, suspension needle seat 204, upper slider 205, lower slider 206, detection unit 207, upper magnet 2071, lower magnet 2072, circuit board 2073, block 208, splint 209, cup placement mechanism 3, channel module 301, bracket 302, thermal insulation cover 303, rotating bracket 304, rotating rod 305, rocking arm 306, brushless motor 307, cam 308, direct-acting wheel 3081, driven wheel 3082, collision block 309, actuator 4, motor 2 401, screw 2 402, mounting seat 403, slide rail 1 404, slider 1 405, timing drive mechanism 5, drive block 501, motor 1 502, screw 1 503, protrusion 504.

[0032] In the existing technology, most thromboelastographs require a high degree of operator involvement, such as pressing the suspension needle 202, putting on the cup cover, and removing the cup cover. However, the applicant has verified that the method of using the suspension wire 201 to connect the suspension needle 202 can provide long-term and reliable detection results. However, due to its own structure, the suspension wire 201 is a component that is extremely easily damaged.

[0033] The embodiments of this application are basically as follows Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown: A semi-automatic thromboelastogram includes a shell 1, a control device, a detection mechanism 2, a cup placement mechanism 3, an actuator 4 and a timing drive mechanism 5, wherein the cup placement mechanism 3 includes a channel module 301, a channel bracket 302, a thermal insulation cover 303 and a rotation module, the channel module 301 includes a cup placement seat, in which a reaction cup is placed, the channel bracket 302 is connected to the channel module 301, the thermal insulation cover 303 is fixed to the outside of the channel module 301, and the rotation module is fixedly connected to the cup placement seat in the channel module 301.

[0034] The rotation module includes a rotation bracket 304, a rotation rod 305, a rocking arm 306, a brushless motor 307, and a cam 308. One end of the rotation bracket 304 is connected to the cup holder, and the other end has a through hole. One end of the rotation rod 305 passes through the through hole and is fixed to the rotation bracket 304, and the other end is fixedly connected to the middle section of the rocking arm 306. One end of the rocking arm 306 is rotatably connected to the mounting bottom surface, and the other end is provided with a bumper 309.

[0035] The cam 308 includes a direct-driven wheel 3081 and a driven wheel 3082. The direct-driven wheel 3081 is eccentrically connected to the drive shaft of the brushless motor 307. In this application, the driven wheel 3082 is rotatably connected to the base. The driven wheel 3082 is in contact with the circumference of the direct-driven wheel 3081, and the impact block 309 at one end of the rocking arm 306 is in contact with the driven wheel 3082.

[0036] In the present application, because the driving shaft of the brushless motor 307 is eccentrically connected to the direct-driven wheel 3081 in the cam 308, when the brushless motor 307 drives the direct-driven wheel 3081, the direct-driven wheel 3081 performs an offset motion, and the driven wheel 3082 contacts the direct-driven wheel 3081, so that the driven wheel 3082 swings during the offset motion of the direct-driven wheel 3081; when the driven wheel 3082 swings, it hits the bumper 309 on the rocking arm 306, because the other end of the rocking arm 306 is in contact with the impact block 309. The base of the device is rotatably connected, causing the rocking arm 306 to swing slightly in response to the impact of the driven wheel 3082. The rotating rod 305 is connected to the middle section of the rocking arm 306, causing the rotating rod 305 to swing slightly as well. The top of the rotating rod 305 is connected to the rotating bracket 304, which is connected to the cup holder. The rotating bracket 304 drives the cup holder to rotate under the swinging action of the rotating rod 305. In this embodiment, the rotation angle of the cup holder is 4°45′.

[0037] The cup placing mechanism 3 is driven to rise and fall by the actuator 4, wherein, Figure 5As shown, the actuator 4 includes a second motor 401, a second screw 402, a mounting seat 403, a slide rail 404 and a slider 405. The second screw 402 is connected to the second motor 401, the slider 405 is installed on the slide rail 404, the mounting seat 403 is fixed on the slider 405 and connected to the second screw 402, and the channel bracket 302 of the cup placing mechanism 3 is fixedly connected to the mounting seat 403.

[0038] In this embodiment, motor 2 401 drives screw 2 402 to rotate, and mounting base 403 is connected to screw 2 402, so that mounting base 403 performs lifting motion on screw 2 402, and channel bracket 302 of cup placing module is also connected to mounting base 403, so that the cup placing module as a whole is driven by mounting base 403 to perform lifting motion. In order to ensure that the lifting of mounting base 403 does not deviate, mounting base 403 is also connected to slider 1 405 of slide rail 1 404. Slide rail 1 404 and slider 1 405 play a guiding and positioning role in the lifting of mounting base 403.

[0039] The cup placing mechanism 3 rises under the control of the actuator 4 and docks with the detection mechanism 2 above to perform the detection action, such as Figure 6 and Figure 7 As shown, in the present application, the detection mechanism 2 includes a suspending wire 201, a suspending needle 202, a suspending wire seat 203, a suspending needle seat 204, a block 208, a splint 209, a detection unit 207, an upper slider 205 and a lower slider 206, wherein one end of the suspending wire 201 is connected to the block 208, and the other end is fixedly connected to the suspending needle seat 204, the splint 209 is located between the block 208 and the suspending needle seat 204, clamping the suspending wire 201, and the splint 209 clamps the suspending wire 201 only for positioning, and the suspending wire 201 can move in the splint 209; the suspending wire seat 203 is above the splint 209, and the top is opened There is a V-shaped bayonet, and the clamping block 208 is located in the V-shaped bayonet; the bottom end of the hanging needle seat 204 is connected to the hanging needle 202, the upper slider 205 and the lower slider 206 are hollow inside, and the hanging needle 202 passes through the upper slider 205 and the lower slider 206. The opposite surfaces of the upper slider 205 and the lower slider 206 are provided with a sliding groove, and the hanging needle seat 204 is provided with a limit block that cooperates with the top surface of the upper slider 205. When the upper slider 205 is pushed upward, the hanging needle seat 204 is pressed tightly, so that the hanging wire 201 is in a free protection state. The lower slider 206 is T-shaped. When the lower slider 206 is pushed downward, the reaction cup cover clamped on the hanging needle 202 can be pushed out.

[0040] The detection unit 207 includes an upper magnet 2071, a lower magnet 2072 and a circuit board 2073. The upper magnet 2071 and the lower magnet 2072 are fixed to the outside of the hanging needle seat 204, and the circuit board 2073 is located between the upper magnet 2071 and the lower magnet 2072 and does not move with the hanging needle seat 204; the hanging needle seat 204 rotates with the detection of the hanging needle 202, and the upper magnet 2071 and the lower magnet 2072 rotate with the hanging needle seat 204, cutting the magnetic field of the circuit board 2073 during rotation, and the generated signal is the thromboelastogram.

[0041] The movement of the upper slider 205 and the lower slider 206 is controlled by the timing drive mechanism 5, which includes a driving block 501, a motor 502 and a screw 503. The driving block 501 is hollow inside and has protrusions 504 on the top and bottom surfaces that cooperate with the slide groove. The protrusion 504 includes a front convexity and a rear convexity, and the height of the rear convexity is greater than the height of the front convexity, and the front convexity and the rear convexity are smoothly connected. Compared with the slide grooves of the upper slider 205 and the lower slider 206, the sliding time of the protrusion 504 on the lower slider 206 is longer than the sliding time of the protrusion 504 on the upper slider 205. The suspension needle 202 passes through the hollow part inside the driving block 501, and one end of the screw 503 is connected to the driving block 501, and the other end is connected to the driving shaft of the motor 502.

[0042] In this embodiment, the block 208 connected to one end of the suspension wire 201 is located in the V-shaped bayonet of the suspension wire seat 203. When the timing drive mechanism 5 is in the initial stage, as shown in FIG. Figure 8A As shown, at this time, the suspension wire 201 is in a free state, and the timing drive mechanism 5 does not interfere with the movement of the suspension wire 201. At this time, the corresponding detection action can be performed, and the suspension needle 202 passes through the cup cover and is inserted into the sample tube or sample cup. When the driving block 501 of the timing drive mechanism 5 is in Figure 8B When the suspending needle seat 204 is in the position shown, the protrusion 504 of the driving block 501 pushes the upper slider 205 upward, and a limit block cooperating with the upper slider 205 is provided on the suspending needle seat 204. The upper slider 205 lifts the suspending needle seat 204 through the limit block, thereby pushing the block 208 of the suspending wire 201 out of the suspending wire seat 203, playing the role of fixing and protecting the suspending wire 201. At this time, the detection action and the cup cover action on the suspending needle 202 can also be performed;

[0043] like Figure 8C As shown, when the driving block 501 continues to move, because the sliding time of the protrusion 504 on the lower slider 206 is longer than the sliding time of the protrusion 504 on the upper slider 205, when the protrusion 504 of the driving block 501 gradually slides out of the sliding groove of the lower slider 206, the driving block 501 pushes the lower slider 206 downward, and because the lower slider 206 is T-shaped, the cup cover is detached from the hanging needle 202, thereby automatically removing the cup cover.

[0044] Similarly, to achieve detection, when the hanging needle 202 is inserted into the sample tube or sample cup, the rotation of the sample tube or sample cup will cause the angle of the hanging needle 202 to change accordingly. The upper magnet 2071 and the lower magnet 2072 installed on the hanging needle seat 204 perform magnetic field cutting on the middle circuit board 2073, and the generated signal is transmitted to the control device for processing, thereby realizing the drawing of the thromboelastogram.

[0045] The control device includes a controller, a display screen 101 and control buttons. The detection mechanism 2, the cup placement mechanism 3, the actuator 4 and the driving parts in the timing drive mechanism 5 are all electrically connected to the controller. The display screen 101 and the control buttons are also electrically connected to the controller. The controller controls the actions of the detection mechanism 2, the cup placement mechanism 3, the actuator 4 and the driving parts in the timing drive mechanism 5 according to the control buttons, and also controls the display screen 101 to display the thromboelastogram.

[0046] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme are not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A semi-automatic thromboelastograph, characterized by: The invention comprises a shell, wherein the shell comprises a control device, a detection mechanism, a cup-releasing mechanism, an actuator and a timing drive mechanism, wherein the control device comprises a controller, and the actuator, cup-releasing mechanism, detection mechanism and timing drive mechanism are all electrically connected to the controller; the detection mechanism comprises a suspension wire, a suspension needle, an upper slider, a lower slider and a detection unit, one end of the suspension wire is fixed with a suspension needle seat, the other end of the suspension needle seat is fixedly connected to the suspension needle, the upper slider is connected to the bottom of the suspension needle seat, the lower slider is located below the upper slider, the timing drive mechanism is located between the upper slider and the lower slider, and under the control of the controller, the timing drive mechanism pushes the upper slider to lift the suspension needle seat to put the suspension wire in a free state, and the timing drive mechanism is also used to push the lower slider to move downward; the detection unit is used to generate a thromboelastogram by rotating the suspension needle; The cup placing mechanism is located below the detection mechanism, and the cup placing mechanism places the reaction cup; the actuator controls the cup placing mechanism to perform lifting actions under the control of the controller; The detection mechanism also includes a suspension wire seat, a clamping block and a clamping plate. The suspension wire seat is hollow inside and has a V-shaped clamping slot on the top. The other end of the suspension wire passes through the suspension wire seat and is connected to the clamping block. The clamping block is placed in the V-shaped clamping slot. The clamping plate is located between the suspension wire seat and the suspension needle seat to clamp the suspension wire. The upper and lower sliders are hollow inside, and sliding grooves are provided on opposite sides. The lower slider is T-shaped, and the hanging needle passes through the upper and lower sliders. The detection unit includes an upper magnet, a lower magnet, and a circuit board, wherein the upper magnet and the lower magnet are fixed to the outside of the suspended needle seat, and the circuit board is located between the upper magnet and the lower magnet and does not move with the suspended needle seat; The timing drive mechanism includes a drive block, a motor 1, and a lead screw 1. The drive block is hollow inside and has protrusions on the top and bottom surfaces that cooperate with the slide groove. The protrusions include a front convexity and a rear convexity. The height of the rear convexity is greater than that of the front convexity, and the front convexity and the rear convexity are smoothly connected. The hanging needle passes through the hollow part of the drive block. One end of the lead screw 1 is connected to the drive block, and the other end is connected to the drive shaft of the motor 1. Compared with the slide grooves of the upper slider and the lower slider, the sliding time of the protrusion on the lower slider is longer than the sliding time of the protrusion on the upper slider.

2. A semi-automatic thromboelastograph according to claim 1, characterized in that: The cup placement mechanism includes a channel module, a channel bracket, a heat preservation cover and a rotation module. The channel module includes a cup placement seat, in which the reaction cup is placed. The channel bracket is connected to the channel module, the heat preservation cover is fixed to the outside of the channel module, and the rotation module is fixedly connected to the cup placement seat in the channel module.

3. The semi-automatic thromboelastograph according to claim 2, characterized in that: The rotation module includes a rotation bracket, a rotation rod, a rocking arm, a brushless motor and a cam. One end of the rotation bracket is connected to the cup holder, and the other end is provided with a through hole. One end of the rotation rod passes through the through hole and is fixed to the rotation bracket, and the other end is fixedly connected to the middle section of the rocking arm. One end of the rocking arm is rotatably connected to the mounting bottom surface, and the other end is provided with a collision block. The cam includes a direct-driven wheel and a driven wheel. The direct-driven wheel is eccentrically connected to the driving shaft of the brushless motor. The driven wheel contacts the circumference of the direct-driven wheel. The collision block at one end of the rocking arm contacts the driven wheel.

4. The semi-automatic thromboelastography device according to claim 2, characterized in that: The actuator includes motor 2, screw 2, mounting seat, slide rail 1 and slider 1. Screw 2 is connected to motor 2, slider 1 is installed on slide rail 1, the mounting seat is fixed on slider 1 and connected to screw 2, and the channel bracket of the cup placement mechanism is fixedly connected to the mounting seat.

5. The semi-automatic thromboelastography instrument according to claim 1, characterized in that: The control device also includes a display screen and control buttons, both of which are electrically connected to the controller. The display screen is used to display the thromboelastogram, and the controller is used to control the operating status of the detection mechanism, cup placement mechanism, actuator and timing drive mechanism by controlling the control buttons.

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