CN111380781A - Cam transmission mechanism and thrombelastogram instrument with same - Google Patents
Cam transmission mechanism and thrombelastogram instrument with same Download PDFInfo
- Publication number
- CN111380781A CN111380781A CN201910442549.9A CN201910442549A CN111380781A CN 111380781 A CN111380781 A CN 111380781A CN 201910442549 A CN201910442549 A CN 201910442549A CN 111380781 A CN111380781 A CN 111380781A
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- CN
- China
- Prior art keywords
- transmission mechanism
- cam
- cam transmission
- swing arm
- thrombelastogram instrument
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 230000033001 locomotion Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 abstract description 25
- 239000000523 sample Substances 0.000 abstract description 18
- 238000010241 blood sampling Methods 0.000 abstract description 12
- 239000008280 blood Substances 0.000 abstract description 9
- 210000004369 blood Anatomy 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000023555 blood coagulation Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000020764 fibrinolysis Effects 0.000 description 2
- 208000010110 spontaneous platelet aggregation Diseases 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
Abstract
The invention relates to a cam transmission mechanism and a thrombelastogram instrument with the cam transmission mechanism, wherein the thrombelastogram instrument realizes the rotation range of 4-5 degrees of a blood sampling cup tray through the cam transmission mechanism, thereby detecting the size and the change of viscous force generated between a blood sample in a blood sampling cup and a sensor probe. With the help of the high authenticity and the high stability of the transmission ratio of the cam transmission mechanism, the speed uniformity and the stability of the blood sampling cup tray in the process of running along the arc direction are realized, and the accuracy, the stability and the consistency of detection data are further ensured.
Description
Technical Field
The invention belongs to the field of blood detection, and particularly relates to a sensor alloy suspension wire and a thromboelastogram instrument with the suspension wire.
Background
The thromboelastogram instrument is a blood coagulation function analyzer for real-time, dynamic and continuous monitoring of the whole process of platelet aggregation, blood coagulation, fibrinolysis and the like, and can be used for qualitative or quantitative analysis of the blood coagulation condition of a patient.
The principle of the thromboelastogram instrument for detecting the blood coagulation function is that a sensor probe is immersed in a blood sample, viscous force exists between the blood sample and the sensor probe, the viscous force changes along with changes of platelet aggregation, blood coagulation, fibrinolysis and the like, a sensor suspension wire generates torsional deformation under the action of the viscous force, the torsional deformation is detected by a detection unit and is converted into an electric signal to be fed back to a control system, the control system carries out operation after receiving the changed signal, and an operation result is displayed on a computer screen in the form of a curve graph and real-time data.
In the detection process, the stability of relative rotation between the tray of the blood sampling cup and the probe of the sensor plays a critical role. Since the sensor probe is used as a stator, the stability of the rotation of the cup holder as a rotor is a critical indicator. The conventional transmission mechanisms of the thrombelastogram instrument in the market generally comprise a belt transmission type transmission mechanism, a motor direct-drive type transmission mechanism and the like. The belt is a rubber product, and the synchronism of drive transmission cannot be ensured because the belt has certain elasticity and has the phenomenon of delayed drive response. In the case of a toothed belt, the meshing force between the belt wheel and the belt has a fixed difference, which affects the smoothness of transmission. The belt and the toothed belt can not completely meet the requirements of the thrombelastogram instrument on high precision and stability of a transmission mechanism. The motor is directly driven, positive and negative rotation movement is needed when the motor does reciprocating movement, transmission errors can be generated when the motor is started and stopped intermittently due to the connection clearance of the transmission part and the mechanical clearance of the motor, and the instantaneity and the accuracy of detection signal transmission of the thrombelastogram instrument are further influenced. Some improved control modes, such as swing reversing and the like, inevitably influence the running performance of the system by factors such as light, foreign matters, electromagnetic interference and the like due to the adoption of sensor control.
Disclosure of Invention
In view of the above, the present invention provides a cam transmission mechanism and a thrombelastogram apparatus having the same.
According to an aspect of the present invention, there is provided a cam transmission mechanism comprising a cam, a slip joint, a swing arm lever, a tension spring, wherein: the sliding joint is fixed at the front end of the swing arm rod; the tensioning spring is hooked in the groove of the swing arm rod, and the two swing arm rods are close to each other due to the tensioning effect of the tensioning spring, so that the sliding joint is driven to be tightly attached to the cam; the cam eccentrically rotates around the motor shaft; the swing arm rod swings at a small angle along with the movement of the cam and the sliding joint; the cam with sliding joint all adopts the material preparation of high strength, high rigidity and high smooth degree to direct rigidity transmission mode realizes through cam mechanism principle the pitch arc reciprocating motion of swing arm pole avoids mechanical clearance and elastic variable's round trip, stops the transmission error that the factor brought, has the advantage that switching-over stability is high, the interference killing feature is strong, has guaranteed driven smooth and easy, precision and durability.
According to another aspect of the present invention, there is provided a thromboelastogram apparatus having a cam gear, comprising a cam gear, a fixing plate, a detection unit, a connecting rod, a blood collection cup tray, a base plate, a sensor probe, and a column, wherein: the tail end of a swing arm rod of the cam transmission mechanism is arranged on a turntable at the bottom of the detection unit; the cam transmission mechanism and the detection unit are jointly arranged on the fixing plate; the fixing plate is fixed with the bottom plate through the upright column to form an internal bracket of the thrombelastogram instrument; the connecting rod is fixed with a bottom turntable of the detection unit by screws; the blood collecting cup tray is arranged on the connecting rod and can smoothly slide up and down; the sensor probe is locked on the detection unit; the thrombelastogram instrument has two detection units and is driven by a cam, so that the movement consistency of the two detection units is ensured.
According to the cam transmission mechanism and/or the thrombelastogram instrument provided by each embodiment of the invention, the uniformity and stability of the speed in the rotation process of the blood collecting cup tray are realized by means of the high authenticity and the high stability of the transmission ratio of the cam transmission mechanism, so that the accuracy, the stability and the consistency of detection data are ensured.
Drawings
In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several figures unless otherwise specified. The figures are not necessarily drawn to scale. These drawings depict only some embodiments in accordance with the disclosure and are not therefore to be considered to limit the scope of the disclosure.
FIG. 1 is a schematic view of a cam gear mechanism according to an embodiment of the present invention;
figure 2 is a schematic diagram of a thrombelastogram apparatus having a cam gear mechanism according to an embodiment of the present invention.
Detailed description of the invention
In the following, only certain exemplary embodiments are briefly described. Those skilled in the art may modify the described embodiments in a variety of different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
As shown in fig. 1, one embodiment of the present invention provides a cam transmission mechanism, which includes a cam 1, a sliding joint 2, a swing arm lever 3, a tension spring 4;
the front end of the swing arm rod 3 is fixed with the sliding joint 2, and the tail end of the swing arm rod 3 is fixed on a turntable at the lower end of the detection unit 5;
two ends of a tensioning spring 4 are hooked in grooves on the two swing arm rods 3, and the two swing arm rods 3 are tensioned to draw close to the middle to drive the two sliding joints 2 to be tightly attached to the cam 1;
the sliding joint 2 is driven to move along with the rotation of the cam 1, the sliding joint 2 drives the swing arm rods 3 to move, and the two swing arm rods 3 drive the two sliding joints 2 to be tightly attached to the cam 1 under the tension action of the tension spring 4;
in one embodiment, the maximum angle of rotation of the swing arm lever is about 4-5.
As shown in fig. 2, an embodiment of the invention provides a thromboelastogram apparatus with a cam transmission mechanism, which comprises a cam transmission mechanism (composed of a cam 1, a sliding joint 2, a swing arm rod 3 and a tension spring 4), a detection unit 5, a fixing plate 6, a connecting rod 7, a blood sampling cup tray 8, a bottom plate 9, a sensor probe 10 and a stand column 11;
the swing arm rod 3 of the component of the cam transmission structure is fixed on a rotary table at the bottom end of the detection unit 5, the cam transmission mechanism is horizontally arranged on the fixed plate 6, the detection unit 5 is fixed on the fixed plate, and the cam transmission mechanism can drive the rotary table at the bottom end of the detection unit 5 to rotate;
the upper end of the connecting rod 7 is fixed on the turntable at the lower end of the detection unit 5 and rotates along with the rotation of the turntable;
the blood sampling cup tray 8 is sleeved on the connecting rod 7 in a penetrating way and can slide up and down smoothly along the connecting rod 7;
the sensor probe 10 is locked on the detection unit 5 and is positioned at the central axis position of the detection unit 5;
the cam transmission mechanism rotates to drive the rotary table at the bottom end of the detection unit 5 to rotate, the rotary table at the bottom end of the detection unit 5 drives the connecting rod 7 to rotate, the connecting rod 7 drives the blood sampling cup tray 8 to rotate, the sensor probe 10 is a stator, the blood sampling cup tray 8 is a rotor, the rotation angle range of the blood sampling cup tray 8 is 4-5 degrees, the sensor probe 10 deforms due to the viscous force between the sensor probe 10 and the blood sample in the blood sampling cup tray 8, and the deformation is converted into an electric signal by the detection unit 10 to be identified and processed;
the fixing plate 6 and the bottom plate 9 are fixed together through the upright post 11 to form a bracket of the thrombelastogram instrument.
In one embodiment, when the cam 1 rotates for one circle, the swing arm 3 is driven to do reciprocating motion, so that the disc at the lower end of the detection unit 5, the connecting rod 7 and the blood sampling cup tray 8 are driven to do reciprocating circular motion (the rotation angle is 4-5 degrees), and the viscosity force between a blood sample in the blood sampling cup tray 8 and the sensor probe 9 is changed.
Claims (2)
1. A thrombelastogram instrument comprises a cam transmission mechanism, wherein the cam transmission mechanism comprises a cam, a sliding joint, a swing arm rod and a tensioning spring.
2. The slip joint according to claim 1, wherein the arc reciprocating motion of the swing arm lever is realized by a cam mechanism principle by using a direct rigid transmission mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910442549.9A CN111380781A (en) | 2019-05-25 | 2019-05-25 | Cam transmission mechanism and thrombelastogram instrument with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910442549.9A CN111380781A (en) | 2019-05-25 | 2019-05-25 | Cam transmission mechanism and thrombelastogram instrument with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111380781A true CN111380781A (en) | 2020-07-07 |
Family
ID=71216803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910442549.9A Pending CN111380781A (en) | 2019-05-25 | 2019-05-25 | Cam transmission mechanism and thrombelastogram instrument with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111380781A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062207A (en) * | 2014-07-15 | 2014-09-24 | 中国科学院苏州生物医学工程技术研究所 | Monitoring device for viscoelastic strength of blood |
| CN104076157A (en) * | 2014-07-15 | 2014-10-01 | 中国科学院苏州生物医学工程技术研究所 | Oscillation device |
| CN106198943A (en) * | 2016-08-16 | 2016-12-07 | 中国科学院苏州生物医学工程技术研究所 | A kind of Studies on Hemodynamic Changes device |
| CN107505471A (en) * | 2017-09-06 | 2017-12-22 | 中国科学院苏州生物医学工程技术研究所 | Thrombus elasticity testing device |
| CN108562730A (en) * | 2018-06-19 | 2018-09-21 | 重庆南方数控设备有限责任公司 | A kind of thrombelastogram instrument detector calibration equipment |
-
2019
- 2019-05-25 CN CN201910442549.9A patent/CN111380781A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062207A (en) * | 2014-07-15 | 2014-09-24 | 中国科学院苏州生物医学工程技术研究所 | Monitoring device for viscoelastic strength of blood |
| CN104076157A (en) * | 2014-07-15 | 2014-10-01 | 中国科学院苏州生物医学工程技术研究所 | Oscillation device |
| CN106198943A (en) * | 2016-08-16 | 2016-12-07 | 中国科学院苏州生物医学工程技术研究所 | A kind of Studies on Hemodynamic Changes device |
| CN107505471A (en) * | 2017-09-06 | 2017-12-22 | 中国科学院苏州生物医学工程技术研究所 | Thrombus elasticity testing device |
| CN108562730A (en) * | 2018-06-19 | 2018-09-21 | 重庆南方数控设备有限责任公司 | A kind of thrombelastogram instrument detector calibration equipment |
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Application publication date: 20200707 |
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