Single-tube sample positioning device

Abstract

The utility model provides a single tube sample positioning device, which comprises a support frame, a driving clamping arm, a driven clamping arm and a driving mechanism, the driving clamping arm is hinged on the support frame through a first hinge shaft, the driven clamping arm is hinged on the support frame through a second hinge shaft, the first hinge shaft is sleeved with a first torsion spring, the second hinge shaft is sleeved with a second torsion spring, and the driving mechanism is arranged on the support frame. The driving clamping arm and the driven clamping arm are arranged on the supporting frame, so that the driving clamping arm and the driven clamping arm clamp a test tube together, a first clamping groove is formed in the driving clamping arm, a second clamping groove is formed in the driven clamping arm, and the driving mechanism is mounted on the supporting frame; the driving mechanism is used for driving the driving clamping arm and the driven clamping arm to be away from each other to be opened and used for increasing the clamping distance between the first clamping groove and the second clamping groove. The device effectively solves the problem of eccentricity of the test tube in the sample suction process, greatly reduces the risk of collision between the sample suction needle and the test tube, improves the sample positioning precision, enhances the operation stability of equipment, and reduces the operation and maintenance cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, specifically, a single tube sample positioning device. BACKGROUND

[0002] In biochemical immune medical equipment, the positioning device of the test tube sample suction site is crucial to ensure the normal operation of the equipment and the accuracy of sample analysis. However, many biochemical immune medical equipment currently lack effective positioning devices for test tube sample suction sites, which leads to a series of potential problems and risks.

[0003] Firstly, the lack of positioning devices can cause the sample test tube to easily deviate during the sample suction process. When the test tube deviates from its proper position, it increases the risk of collision between the sample suction needle and the test tube arm. Such collisions not only can damage the critical components of the equipment, but also can affect the integrity of the sample and the accuracy of the analysis results.

[0004] Secondly, frequent collision events can significantly reduce the operational stability of the equipment. Each collision can cause the equipment to need to be shut down for inspection and adjustment, which not only affects the efficiency of the laboratory, but also can delay important medical diagnostic results.

[0005] In addition, the lack of effective positioning devices leads to frequent collisions and potential equipment damage, which greatly increases the operation and maintenance costs of the equipment. This includes more frequent maintenance, replacement of parts, and possible economic losses caused by equipment downtime.

[0006] Finally, unstable sample positioning can also affect the precision and consistency of sample suction. In some medical tests that require high-precision analysis, this instability can cause deviations in test results, which can affect the accuracy of diagnosis. SUMMARY

[0007] The purpose of the present application is to provide a single tube sample positioning device, which has the advantages of improving sample positioning accuracy and reducing collision risk.

[0008] The application provides a single-tube sample positioning device, which comprises a support frame, a driving clamping arm, a driven clamping arm and a driving mechanism, the driving clamping arm is hinged to the support frame through a first hinge shaft, the driven clamping arm is hinged to the support frame through a second hinge shaft, a first torsional spring is sleeved on the first hinge shaft, the first torsional spring is used for driving the driving clamping arm to rotate towards the driven clamping arm, a second torsional spring is sleeved on the second hinge shaft, the second torsional spring is used for driving the driven clamping arm to rotate towards the driving clamping arm, so that the driving clamping arm and the driven clamping arm clamp a test tube together, a first clamping groove for abutting against a test tube wall is arranged on the driving clamping arm, a second clamping groove for abutting against a test tube wall is arranged on the driven clamping arm, and the driving mechanism is installed on the support frame and used for driving the driving clamping arm and the driven clamping arm to open away from each other and increasing the clamping distance between the first clamping groove and the second clamping groove.

[0009] Compared with the prior art, the single-tube sample positioning device has the following advantages: the driving clamping arm and the driven clamping arm are connected to the support frame through hinge shafts, and can realize opening and closing actions. In order to ensure the clamping force, torsional springs are respectively arranged on the hinge shafts and used for driving the two clamping arms to move towards each other. In order to better adapt to the cylindrical shape of the test tube, clamping grooves are respectively arranged on the driving clamping arm and the driven clamping arm, and the clamping grooves can abut against the test tube wall and provide more stable support. The design of the driving mechanism solves the problem of automation of the device, and the driving mechanism can drive the two clamping arms to open, facilitating the insertion and removal of the test tube. The application can effectively solve the eccentricity problem of the test tube and improve the accuracy and efficiency of biochemical immune detection. At the same time, the automation characteristics of the device greatly improve the speed and reliability of sample processing.

[0010] In a possible implementation, two first clamping wheels are arranged on the driving clamping arm, the two first clamping wheels are arranged at intervals and form the first clamping groove, two second clamping wheels are arranged on the driven clamping arm, and the two second clamping wheels are arranged at intervals and form the second clamping groove. Compared with the prior art, by arranging two clamping wheels on the driving clamping arm and the driven clamping arm respectively, a larger contact area is formed, the clamping force can be better dispersed, the local pressure on the test tube is reduced, and the risk of test tube damage is reduced. At the same time, the design of the clamping wheel also enables the clamping device to adapt to test tubes of different diameters, thereby increasing the applicability of the device and improving the clamping stability and reliability of the test tube.

[0011] In a possible implementation, the first clamping wheel is rotatably arranged on the driving clamping arm, and the second clamping wheel is rotatably arranged on the driven clamping arm. Compared with the prior art, by arranging the clamping wheel to be rotatable, the contact area between the clamping wheel and the test tube is effectively increased, and the stability of clamping is improved. When the test tube is clamped, the rotatable clamping wheel can adjust the position according to the slight change of the test tube surface, so that more uniform and stable clamping force distribution is achieved.

[0012] In a possible implementation, the driving mechanism includes a main transmission arm, a driven transmission arm, a driving cam, and a driving motor. The driving motor is mounted on a support frame. An output shaft of the driving motor is connected with the driving cam. A front end of the main transmission arm is hingedly connected to a first hinge shaft and fixed with the driving clamping arm. A rear end of the main transmission arm is connected with the driving cam to drive the driving clamping arm to open. A front end of the driven transmission arm is hingedly connected to a second hinge shaft and fixed with the driven clamping arm. A rear end of the driven transmission arm is connected to the main transmission arm to drive the driven clamping arm to open. Compared with the prior art, the characteristics of the cam mechanism are ingeniously utilized. The rotation of the driving cam is controlled by the driving motor, and then the accurate control of the main transmission arm and the driven transmission arm is achieved. The main transmission arm is directly connected with the driving cam, and the movement of the driving clamping arm can be accurately controlled. The driven transmission arm is connected with the main transmission arm, and the coordinated movement with the driving clamping arm is achieved. This design not only simplifies the structure, but also improves the accuracy and reliability of control.

[0013] In a possible implementation, a first roller is rotatably arranged at the rear end of the main transmission arm and abuts against the outer periphery of the driving cam. Compared with the prior art, by arranging the first roller at the rear end of the main transmission arm to abut against the driving cam, the problems of large friction, fast wear, and unstable transmission existing in the traditional direct contact mode are solved. This improvement not only improves the working efficiency and accuracy of the device, but also prolongs the service life of the key components and reduces the maintenance cost. Compared with using a complex gear transmission or hydraulic transmission system, the scheme of the present application has a simple structure, is easy to implement and maintain, and can achieve good transmission effect, which embodies the ingenuity and practicality of the design.

[0014] In a possible implementation, a second roller is rotatably arranged at the rear end of the driven transmission arm, and a guide step is arranged on the main transmission arm and abuts against the second roller. Compared with the prior art, by combining the rolling contact and the guide structure, the stability of the connection is enhanced, the friction is reduced, and the accuracy of movement is improved. This improvement is particularly important for biochemical and immunological medical devices that require high-precision positioning, and can effectively reduce the sample positioning error caused by unstable mechanical structure, thereby improving the working efficiency and reliability of the entire device.

[0015] In one possible implementation, the support frame includes a column plate and a mounting seat fixed at the top of the column plate, and the mounting seat is provided for mounting the first hinge shaft and the second hinge shaft. Compared with the prior art, the support frame structure can provide a more stable foundation, which is beneficial to the stability and accuracy of the entire clamping device. The column plate serves as the main support structure and provides a solid foundation for the entire device. The mounting seat is fixed at the top of the column plate to form a stable platform for mounting the first hinge shaft and the second hinge shaft. This design not only enhances the stability of the overall structure, but also facilitates accurate positioning and installation of the hinge shafts, thereby ensuring that the movement of the driving clamping arm and the driven clamping arm is more accurate and reliable.

[0016] In one possible implementation, a detection optocoupler is arranged on the mounting seat to detect the position of the driving cam. Compared with the prior art, the arrangement of the detection optocoupler can achieve accurate detection of the position of the driving cam, thereby improving the control accuracy and reliability of the entire device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Structure of the present application Figure One ;

[0018] Figure 2 Structure of the present application Figure Two ;

[0019] Figure 3 Structure of the present application Figure Three ;

[0020] Figure 4 Part of the structure of the present application Figure One ;

[0021] Figure 5 Part of the structure of the present application Figure Two ;

[0022] Figure 6 Part of the structure of the present application Figure Three ;

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, support frame; 11, column plate; 12, mounting seat; 2, driving clamping arm; 21, first clamping wheel; 3, driven clamping arm; 31, second clamping wheel; 4, driving mechanism; 41, main transmission arm; 411, first roller; 412, guide step; 42, driven transmission arm; 421, second roller; 43, driving cam; 44, driving motor; 5, first hinge shaft; 6, second hinge shaft; 7, first torsional spring; 8, second torsional spring; 9, detection optocoupler. DETAILED DESCRIPTION

[0025] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed to adapt to specific application occasions.

[0026] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0027] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0028] In biochemical immune medical equipment, the lack of positioning device in the test tube sampling site is a serious technical problem. This leads to the easy occurrence of eccentricity of sample test tubes, and further causes the collision between the sampling needle and the test tube arm. Such collision not only affects the normal operation of the equipment, but also may cause sample contamination, sampling precision decline, and even equipment damage. Specifically, the eccentricity of the test tube changes the preset trajectory of the sampling needle, making it unable to accurately enter the center position of the test tube. This deviation may cause inaccurate sampling volume, affecting the subsequent detection results, and thus reducing the reliability of the entire biochemical immune analysis process.

[0029] In actual application scenarios, for example, an automated detection laboratory in a large medical center, thousands of samples need to be processed every day. The automated biochemical immune analyzer is usually equipped with multiple test tube racks, each rack can accommodate dozens of test tubes. During the sample loading process, due to human operation or mechanical vibration, the test tubes may be slightly tilted or deviated. When the sampling arm moves to the preset position, if the test tube is eccentric, the sampling needle may touch the test tube wall or completely miss the test tube opening. This not only causes the failure of the current sample detection, but also may trigger a series of chain reactions. For example, the bending of the sampling needle may affect the detection accuracy of all subsequent samples, and even may cause the needle to break, resulting in interruption of the entire detection process.

[0030] If this technical problem is not solved, it will have a serious impact on the entire biochemical immune detection system. First, frequent sample suction failure will greatly reduce the detection efficiency of the equipment and prolong the waiting time for the patient to get the results. Second, due to the increased risk of needle collision, the maintenance frequency and cost of the equipment will increase significantly. More seriously, inaccurate sample suction may lead to false detection results, which is absolutely unacceptable in medical diagnosis. In the long run, if this problem is not solved, it will limit the further development and application of biochemical immune detection technology. Therefore, developing a technology that can accurately position the test tube and ensure the stability and reliability of the sample suction process is of great significance to improve the accuracy, efficiency and reliability of biochemical immune detection.

[0031] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0032] Referring to Figures 1 to 6 The embodiments of the present application disclose a single-tube sample positioning device, which comprises a support frame 1, a driving clamping arm 2, a driven clamping arm 3 and a driving mechanism 4. The driving clamping arm 2 is hinged to the support frame 1 through a first hinge shaft 5, and the driven clamping arm 3 is hinged to the support frame 1 through a second hinge shaft 6. A first torsional spring 7 is sleeved on the first hinge shaft 5 for driving the driving clamping arm 2 to rotate towards the driven clamping arm 3, and a second torsional spring 8 is sleeved on the second hinge shaft 6 for driving the driven clamping arm 3 to rotate towards the driving clamping arm 2, so that the driving clamping arm 2 and the driven clamping arm 3 clamp the test tube together. The driving clamping arm 2 is provided with a first clamping groove for abutting the test tube wall, and the driven clamping arm 3 is provided with a second clamping groove for abutting the test tube wall. The driving mechanism 4 is installed on the support frame 1 and is used for driving the driving clamping arm 2 and the driven clamping arm 3 to move away from each other and open, and for increasing the clamping distance between the first clamping groove and the second clamping groove.

[0033] As can be known from the above, the support frame 1 provides stable support as the basis of the entire device. The active clamping arm 2 and the driven clamping arm 3 are respectively hinged to the support frame 1 through the first hinge shaft 5 and the second hinge shaft 6. This hinged structure allows the two clamping arms to open and close. The first torsional spring 7 is sleeved on the first hinge shaft 5, and the second torsional spring 8 is sleeved on the second hinge shaft 6. The two torsional springs respectively provide the active clamping arm 2 and the driven clamping arm 3 with an elastic force for turning inward. When it is necessary to put in a test tube, the driving mechanism 4 drives the active clamping arm 2 and the driven clamping arm 3 to move away from each other to open. At this time, the clamping distance between the first clamping groove and the second clamping groove increases to provide enough space for the test tube to be put in. After the test tube is put in, the driving mechanism 4 releases the clamping arms, and the two clamping arms will automatically clamp the test tube under the action of the torsional spring. The design of the first clamping groove and the second clamping groove can fit the test tube wall to provide more stable support. Through the elastic force provided by the torsional spring, the device can adapt to test tubes of different diameters, and the flexible clamping of the torsional spring can control the clamping force and reduce the risk of the sample test tube being clamped and broken. At the same time, the design of the clamping groove increases the contact area with the test tube, improving the stability of clamping. The introduction of the driving mechanism 4 realizes the automatic operation of the device and improves the work efficiency.

[0034] In this embodiment, two first clamping wheels 21 are arranged on the active clamping arm 2, and two second clamping wheels 31 are arranged on the driven clamping arm 3. When it is necessary to clamp the test tube, the driving mechanism 4 first drives the active clamping arm 2 and the driven clamping arm 3 to open. The test tube is placed between the two clamping arms, and then the driving mechanism 4 releases the clamping arms. Under the action of the first torsional spring 7 and the second torsional spring 8, the active clamping arm 2 and the driven clamping arm 3 will automatically close to clamp the test tube between the first clamping groove and the second clamping groove. Since each clamping groove is formed by two clamping wheels, the test tube will be clamped by four points at the same time, greatly improving the stability of clamping. Specifically, the first clamping wheel 21 and the second clamping wheel 31 can be made of flexible materials, such as rubber or soft plastic. This material selection can further improve the stability and safety of clamping. The flexible material can deform to a certain extent to adapt to the surface of the test tube, increase the friction force, and prevent the test tube from slipping. At the same time, the flexible material can also reduce the wear on the surface of the test tube.

[0035] In this embodiment, the first clamping wheel 21 is rotatably arranged on the driving clamping arm 2, and the second clamping wheel 31 is rotatably arranged on the driven clamping arm 3. Specifically, the first clamping wheel 21 is rotatably arranged on the driving clamping arm 2, which can be achieved by a bearing or other rotating mechanism. This design allows the first clamping wheel 21 to rotate freely during clamping, thereby adapting to the curvature of the test tube surface and possible minor irregularities. Similarly, the second clamping wheel 31 is rotatably arranged on the driven clamping arm 3, also using a similar rotating mechanism. The two sets of rotatable clamping wheels work together to provide a more flexible and adaptive clamping effect when clamping the test tube. Further, the rotatable clamping wheel design also brings additional advantages. For example, when adjusting the position of the test tube, the rotatable clamping wheel can reduce friction with the test tube surface, making it easier and more accurate to fine-tune the test tube. In addition, this design can also reduce the wear on the test tube surface during clamping, which is beneficial to the integrity of the test tube. The scheme of the present application has the following advantages: first, four-point clamping provides better stability, reducing the risk of test tube tilting or falling off; second, the use of flexible materials increases the safety of clamping, reducing the risk of damage to the test tube; third, the rotatable clamping wheel design improves the flexibility of operation, facilitating subsequent sample processing. As a preferred embodiment, special textures or grooves can be designed on the surface of the clamping wheel to further increase the friction with the test tube.

[0036] In this embodiment, the driving mechanism 4 includes a main transmission arm 41, a slave transmission arm 42, a driving cam 43, and a driving motor 44. The driving motor 44 is mounted on the support frame 1, and its output shaft is connected with the driving cam 43. The front end of the main transmission arm 41 is hinged on the first hinge shaft 5 and fixed with the active clamping arm 2, and the rear end is connected with the driving cam 43 for driving the active clamping arm 2 to open. The front end of the slave transmission arm 42 is hinged on the second hinge shaft 6 and fixed with the passive clamping arm 3, and the rear end is connected on the main transmission arm 41 for driving the passive clamping arm 3 to open. Specifically, when the driving motor 44 operates, the driving cam 43 rotates accordingly. The rotation of the cam pushes the rear end of the main transmission arm 41, causing the main transmission arm 41 to rotate around the first hinge shaft 5 and drive the active clamping arm 2 to open. At the same time, the movement of the main transmission arm 41 drives the slave transmission arm 42 to rotate around the second hinge shaft 6 through the connection with the rear end of the slave transmission arm 42, thereby driving the passive clamping arm 3 to open. This linkage mechanism ensures the synchronous movement of the active clamping arm 2 and the passive clamping arm 3, effectively avoiding the problems of uneven clamping or test tube tilting. Further, the shape of the driving cam 43 can be optimized according to needs, for example, using involute or other specific curves, to achieve more smooth and precise motion control. The length ratio of the main transmission arm 41 and the slave transmission arm 42 can also be adjusted to obtain the best clamping effect. Thus, the design of this driving mechanism 4 not only solves the problem of precise control of the active clamping arm 2 and the passive clamping arm 3, but also realizes the coordinated movement of the two. This coordinated movement is crucial for ensuring the stable clamping of the test tube, effectively preventing the test tube from tilting or shifting during clamping, thereby improving the working precision and reliability of the entire device.

[0037] In this embodiment, the rear end of the main transmission arm 41 is provided with a first roller 411, which is in abutment with the outer periphery of the driving cam 43. Firstly, the provision of the first roller 411 can reduce the friction between the main transmission arm 41 and the driving cam 43, improving the transmission efficiency. Since the first roller 411 can rotate freely, when the driving cam 43 rotates, the first roller 411 will roll along with it, rather than directly sliding against the cam surface. This rolling contact can significantly reduce friction, reduce energy loss, and make the operation of the driving mechanism 4 more smooth. Secondly, the design of the first roller 411 can prolong the service life of the main transmission arm 41 and the driving cam 43. Traditional direct contact methods are prone to wear on the contact surface, while the roller design can distribute the contact pressure and reduce local wear, thereby prolonging the service life of the components. Furthermore, the abutment of the first roller 411 and the driving cam 43 can ensure stable contact between the two. During device operation, even if there is slight vibration or positional deviation, the roller can always maintain good contact with the cam, ensuring the continuity and stability of the transmission. The rotation of the first roller 411 can more accurately follow the contour changes of the driving cam 43, thereby making the movement of the main transmission arm 41 more accurately reflect the design intent of the cam, improving the positioning accuracy of the entire clamping mechanism. As a preferred embodiment, the first roller 411 can be made of wear-resistant materials, such as high-strength engineering plastics or surface-hardened metal materials. The diameter of the first roller 411 can be optimized according to the size of the driving cam 43.

[0038] In this embodiment, the rear end of the transmission arm 42 is provided with a second roller 421, and the main transmission arm 41 is provided with a guide step 412 in abutment with the second roller 421. The cooperation of the second roller 421 and the guide step 412 not only enhances the connection strength between the two, but also reduces friction and improves the smoothness of movement. Specifically, the second roller 421 can be made of wear-resistant materials, such as nylon or polyurethane, which can reduce friction with the guide step 412 and prolong service life. The guide step 412 can be machined into a smooth slope or arc on the main transmission arm 41, so that the second roller 421 can roll smoothly. When the driving mechanism 4 drives the main transmission arm 41 to move, the guide step 412 on the main transmission arm 41 will drive the second roller 421 to move, thereby realizing the synchronous movement of the transmission arm 42. Since the second roller 421 can freely roll on the guide step 412, it can reduce friction between the two, reduce energy consumption, and improve the smoothness of movement. At the same time, the guide step 412 plays a guiding and limiting role for the second roller 421, which can prevent the transmission arm 42 from deviating or shaking, ensuring the accuracy of its movement trajectory.

[0039] In this embodiment, the support frame 1 includes a column plate 11 and a mounting seat 12 fixed on the top of the column plate 11, which is used for mounting the first hinge shaft 5 and the second hinge shaft 6. Specifically, the column plate 11 can be made of metal materials such as aluminum alloy or stainless steel to provide sufficient strength and rigidity. The height of the column plate 11 can be adjusted according to the specific application requirements. The connection between the mounting seat 12 and the column plate 11 can be bolted or welded to ensure a firm connection between the two. To further improve stability, reinforcing ribs or support structures can be added between the column plate 11 and the mounting seat 12. This improved support frame 1 structure not only improves the stability of the entire device, but also provides a more reliable mounting basis for the active clamping arm 2 and the driven clamping arm 3. Due to the more stable hinge shaft installation, the movement of the clamping arm is more accurate, improving the reliability and accuracy of clamping.

[0040] In this embodiment, a detection photocoupler 9 is provided on the mounting seat 12 for detecting the position of the drive cam 43. Specifically, the detection photocoupler 9 can be installed on the mounting seat 12 near the drive cam 43. The detection photocoupler 9 can be a transmission or reflection photoelectric sensor, the specific choice can be determined according to the actual application scene and space limitations. The signal output of the detection photocoupler 9 can be connected to the input of the control system. According to the received signal, the control system can accurately calculate the current angle position of the drive cam 43. This information can be used in several ways: first, it can be used to ensure that the rotational speed and angle of the drive cam 43 meet the preset requirements; second, it can be used to determine the actual opening and closing state of the active clamping arm 2 and the driven clamping arm 3, thereby achieving precise control over the test tube clamping process; finally, it can also be used to detect abnormalities in the drive mechanism 4, such as drive cam 43 jamming or drive motor 44 failure. By providing the detection photocoupler 9 on the mounting seat 12, the application achieves accurate detection of the position of the drive cam 43, which brings several significant technical effects: first, it improves the positioning accuracy of the single-tube sample positioning device, ensuring that the test tube can be accurately clamped at the predetermined position; second, it enhances the reliability of the device, by monitoring the position of the drive cam 43 in real time, it can timely discover and handle possible abnormal situations; finally, it optimizes the control performance of the device, making the entire clamping process more stable and controllable.

[0041] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms "in", "out" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In the description of the application, the description of the terms "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" and the like means that the specific features, mechanisms, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0043] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A single tube sample positioning device, characterized by, The utility model provides a kind of test tube clamping device, including support frame (1), active clamping arm (2), driven clamping arm (3) and drive mechanism (4), the active clamping arm (2) is hinged on support frame (1) by first hinged shaft (5), the driven clamping arm (3) is hinged on support frame (1) by second hinged shaft (6), first torsional spring (7) is sleeved on the first hinged shaft (5), the first torsional spring (7) is used to drive active clamping arm (2) to rotate towards driven clamping arm (3), second torsional spring (8) is sleeved on the second hinged shaft (6), the second torsional spring (8) is used to drive driven clamping arm (3) to rotate towards active clamping arm (2), so that active clamping arm (2) and driven clamping arm (3) are clamped together test tube, first clamping groove for fitting test tube wall is equipped on the active clamping arm (2), second clamping groove for fitting test tube wall is equipped on the driven clamping arm (3), drive mechanism (4) is installed on support frame (1), the drive mechanism (4) is used to drive active clamping arm (2) and driven clamping arm (3) away from each other and is used to increase the clamping distance between the first clamping groove and second clamping groove.

2. The single tube sample positioning device of claim 1, wherein, First clamping wheel (21) is arranged on the active clamping arm (2), and second clamping wheel (31) is arranged on the driven clamping arm (3).

3. The single tube sample positioning device of claim 2, wherein, The first clamping wheel (21) is rotatably arranged on the active clamping arm (2), and the second clamping wheel (31) is rotatably arranged on the driven clamping arm (3).

4. The single tube sample positioning device of claim 1, wherein, The drive mechanism (4) includes a main transmission arm (41), a slave transmission arm (42), a drive cam (43) and a drive motor (44), the drive motor (44) is installed on the support frame (1), the output shaft of the drive motor (44) is connected with the drive cam (43), the front end of the main transmission arm (41) is hinged on the first hinged shaft (5) and is fixed with the active clamping arm (2), the rear end of the main transmission arm (41) is connected with the drive cam (43) to drive the active clamping arm (2) to open, the front end of the slave transmission arm (42) is hinged on the second hinged shaft (6) and is fixed with the driven clamping arm (3), and the rear end of the slave transmission arm (42) is connected on the main transmission arm (41) to drive the driven clamping arm (3) to open.

5. The single tube sample positioning device of claim 4, wherein, The rear end of the main transmission arm (41) is rotatably provided with a first roller (411), and the first roller (411) abuts against the outer periphery of the drive cam (43).

6. The single tube sample positioning device of claim 4, wherein, The rear end of the slave transmission arm (42) is rotatably provided with a second roller (421), and the main transmission arm (41) is provided with a guide step (412) abutting against the second roller (421).

7. The single tube sample positioning device of claim 4, wherein, The support frame (1) includes a column plate (11) and a mounting seat (12), the mounting seat (12) is fixed on the top of the column plate (11), and the mounting seat (12) is used for mounting the first hinged shaft (5) and the second hinged shaft (6).

8. The single tube sample positioning device of claim 7, wherein, The mounting base (12) is provided with a detection photo-coupler (9) for detecting the position of the driving cam (43).

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