Adjustable low-cost mechanical structure for test tube existence detection

Abstract

The utility model relates to the technical field of medical instrument sample test tube existence identification, in particular to an adjustable low-cost mechanical structure for test tube existence detection, which comprises a mounting adapter plate, an optocoupler mounting assembly and a detection assembly, the detection assembly comprises an indexing rotating seat, an indexing limiting block, a locking screw rod, a compression spring, a hand-screwing nut and a rotating component, when the test tube rack performs sample introduction, the torsion spring is forced to deform, the optocoupler baffle rotates along with the steering transition block to trigger the optocoupler, then whether optocoupler signals change or not is recognized through a program, if yes, sample introduction is continued, then the optocoupler baffle automatically resets along with the torsion spring, and the optocoupler signals change once again at the moment. The problems of missing detection and false detection in the blood test tube existence detection process under the automatic sample injection mode of the blood cell analysis instrument are effectively solved, and the precision, reliability and sustainability of the instrument are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instrument sample test tube presence identification, in particular to an adjustable low-cost mechanical structure for test tube presence detection. Background Art

[0002] In the clinical practice of hospitals, blood cell analysis and specific protein analysis integrated machines are widely used. Before analysis, it is necessary to determine whether there is a sample tube.

[0003] However, due to the gap between the test tube rack and the test tube, as well as the influence of the position of other components, it is very easy to miss or misdetect when using photoelectric sensors to detect the presence of test tubes. It is also difficult to adjust the position of the photoelectric switch. Finally, the price of the photoelectric switch is also relatively expensive. In summary, the current use of photoelectric switches to detect the presence of test tubes is not conducive to the accuracy, reliability and sustainability of the instrument. Utility Model Content

[0004] The utility model aims to provide a low-cost mechanical structure for adjustable test tube presence detection, which solves the problem that the existing use of photoelectric switches to detect the presence of test tubes is not conducive to the accuracy, reliability and sustainability of the instrument.

[0005] To achieve the above-mentioned purpose, the utility model provides a low-cost mechanical structure for adjustable test tube presence detection, including an installation adapter plate, an optical coupling installation component and a detection component;

[0006] The detection assembly includes an indexing rotating seat, an indexing limit block, a locking screw, a compression spring, a hand-tightening nut and a rotating member. The indexing rotating seat is detachably connected to the mounting adapter plate and is located on one side of the mounting adapter plate. There are two indexing limit blocks, and the two indexing limit blocks are respectively connected to the indexing rotating seat and are respectively located at the upper and lower ends of the indexing rotating seat. The locking screw passes through the two indexing limit blocks. The compression spring is located on the outside of the locking screw. The hand-tightening nut is threadedly connected to the locking screw and is located at one end of the locking screw close to the compression spring. The rotating member is connected to the locking screw.

[0007] Wherein, the rotating member includes an upper rotating plate and a lower rotating plate, the upper rotating plate and the lower rotating plate are respectively located between the two indexing limit blocks, the lower rotating plate is located below the upper rotating plate, and the locking screw passes through the upper rotating plate and the lower rotating plate.

[0008] Wherein, the rotating component also includes a rotating positioning pin and a positioning pin guide sleeve, and the positioning pin guide sleeve is located between the upper rotating plate and the lower rotating plate; the number of the rotating positioning pins is two, and the two rotating positioning pins are respectively located at the upper and lower ends of the positioning pin guide sleeve, and the two rotating positioning pins are respectively located inside the upper rotating plate and the lower rotating plate.

[0009] Wherein, the rotating component also includes a first rotating shaft, a first torsion spring, a steering transition block, a second rotating shaft, a second torsion spring and a baffle mounting block, wherein two ends of the first rotating shaft are respectively connected to the upper rotating plate and the lower rotating plate, and are located on the side of the upper rotating plate away from the rotation positioning pin; the first torsion spring is sleeved on the outer side of the first rotating shaft, one end of the first torsion spring abuts against the lower rotating plate, and the other end abuts against the steering transition block; the first rotating shaft passes through the steering transition block, and the steering transition block is located between the upper rotating plate and the lower rotating plate; the second rotating shaft is connected to the steering transition block and is located on the side of the steering transition block away from the first rotating shaft; the second torsion spring is sleeved on the outer side of the second rotating shaft, one end of the second torsion spring abuts against the steering transition block, and the other end abuts against the baffle mounting block; the second rotating shaft passes through the baffle mounting block.

[0010] Wherein, the rotating component also includes a shaft pressing block and an optical coupling baffle, the shaft pressing block is detachably connected to the steering transition block and is located on the top of the steering transition block; the optical coupling baffle is detachably connected to the shaft pressing block and is located on the top of the shaft pressing block.

[0011] Wherein, the rotating component further comprises a test tube baffle, which is detachably connected to the baffle mounting block and is located on a side of the baffle mounting block away from the second rotating shaft.

[0012] Among them, the optocoupler mounting assembly includes an optocoupler mounting plate and an optocoupler, the optocoupler mounting plate is detachably connected to the mounting adapter plate, and is located on a side of the mounting adapter plate close to the indexing rotating seat; the optocoupler is fixedly connected to the optocoupler mounting plate, and is located on a side of the optocoupler mounting plate away from the mounting adapter plate.

[0013] The utility model provides an adjustable low-cost mechanical structure for detecting the presence or absence of test tubes. The test tube rack is placed in a designated position, the automatic injection mode is selected, and the test tube rack is pushed to the corresponding detection position. The motor continues to operate to drive the test tube rack to inject samples and force the torsion spring to deform. The optical coupling baffle rotates with the steering transition block to trigger the optical coupling, and then the program is used to identify whether the optical coupling signal changes. If it changes, the injection continues, and then the optical coupling baffle is automatically reset with the torsion spring, and the optical coupling signal changes again. Figure 1In the embodiment, the test tubes with different center distances can be detected by changing the angle θ. Changing the angle θ can change the value of L1+L2, thereby matching different center distance values. In addition, in order to ensure that the test tube rack can pass through the detection mechanism normally in both the injection direction and the return direction, two rotating pairs are designed, wherein the rotating pair 1 is naturally formed by the assembly of the baffle mounting block, the steering transition block and the second rotating shaft, ensuring that the baffle mounting block and the steering transition block can rotate relative to each other, and is used to allow the test tube rack to pass along the injection direction; the rotating pair 2 is naturally formed by the assembly of the upper rotating plate, the lower rotating plate, the steering transition block and the first rotating shaft, ensuring that the upper rotating plate, the lower rotating plate and the steering transition block can rotate relative to each other, and is used for return. In order to ensure that the rotating pair 2 will not move during injection, and the rotating pair 1 will not move during return, rotation limit structures are designed at the two rotating pair positions respectively to ensure that the maximum rotation angle of the two rotating pairs is 90°. It effectively solves the problems of missed detection and false detection in the process of blood test tube detection in the automatic sampling mode of the blood cell analyzer. It adopts a mechanical detection method to avoid the adverse effects of the environment, installation position and external interference on the photoelectric switch itself, which is beneficial to the accuracy, reliability and sustainability of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a simplified schematic diagram of sample injection of the utility model.

[0016] Figure 2 The utility model is a test tube presence detection flow chart.

[0017] Figure 3 The utility model is a use state diagram of a low-cost mechanical structure for adjustable test tube presence detection.

[0018] Figure 4 It is a schematic diagram of the installation of the optical coupler mounting plate of the utility model.

[0019] Figure 5 It is a structural schematic diagram of a low-cost mechanical structure for adjustable test tube presence detection of the utility model.

[0020] Figure 6 It is an exploded view of a low-cost mechanical structure for adjustable test tube presence detection of the utility model.

[0021] Figure 7 It is a schematic diagram of the structure and function of the utility model.

[0022] In the figure: 101-installation adapter plate, 102-dividing rotating seat, 103-dividing limit block, 104-locking screw, 105-compression spring, 106-hand nut, 107-upper rotating plate, 108-lower rotating plate, 109-rotation positioning pin, 110-positioning pin guide sleeve, 111-first rotating shaft, 112-first torsion spring, 113-steering transition block, 114-second rotating shaft, 115-second torsion spring, 116-baffle mounting block, 117-rotating shaft pressing block, 118-optical coupling baffle, 119-test tube baffle, 120-optical coupling mounting plate, 121-optical coupling. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] See also Figures 1 to 7 ,in, Figure 1 It is a simplified schematic diagram of sample injection of the utility model. Figure 2 The utility model is a test tube presence detection flow chart. Figure 3 The utility model is a use state diagram of a low-cost mechanical structure for adjustable test tube presence detection. Figure 4 It is a schematic diagram of the installation of the optical coupling mounting plate 120 of the present invention. Figure 5 It is a structural schematic diagram of a low-cost mechanical structure for adjustable test tube presence detection of the utility model. Figure 6 It is an exploded view of a low-cost mechanical structure for adjustable test tube presence detection of the utility model. Figure 7 The utility model provides a low-cost mechanical structure for adjustable test tube presence detection: including an adapter plate 101, an optical coupling mounting assembly and a detection assembly, the detection assembly includes a graduated rotating seat 102, a graduated stop block 103, a locking screw 104, a compression spring 105, a hand-tightened nut 106 and a rotating member, the rotating member includes an upper rotating plate 107, a lower rotating plate 108, a rotating positioning pin 109, a positioning pin guide sleeve 110, a first rotating shaft 111, a first torsion spring 112, a steering transition block 113, a second rotating shaft 114, a second torsion spring 115, a baffle mounting block 116, a rotating shaft pressing block 117, an optical coupling baffle 118 and a test tube baffle 119, and the optical coupling mounting assembly includes an optical coupling mounting plate 120 and an optical coupler 121.

[0025] According to this specific embodiment, the indexing rotating seat 102 is detachably connected to the mounting adapter plate 101 and is located on one side of the mounting adapter plate 101. There are two indexing limit blocks 103, and the two indexing limit blocks 103 are respectively connected to the indexing rotating seat 102 and are respectively located at the upper and lower ends of the indexing rotating seat 102. The locking screw 104 passes through the two indexing limit blocks 103, and the compression spring 105 is located on the outside of the locking screw 104. The hand-tightening nut 106 is threadedly connected to the locking screw 104 and is located at one end of the locking screw 104 close to the compression spring 105, and the rotating member is connected to the locking screw 104. The upper rotating plate 107 and the lower rotating plate 108 are respectively located between the two indexing limit blocks 103 , the lower rotating plate 108 is located below the upper rotating plate 107 , and the locking screw 104 passes through the upper rotating plate 107 and the lower rotating plate 108 .

[0026] The mounting adapter plate 101 is installed on the test tube automatic sampling equipment for support, the indexing rotating seat 102 is installed on one side of the mounting adapter plate 101 by bolts, and the upper and lower ends of the side away from the mounting adapter plate 101 are respectively connected with the indexing limit blocks 103, the upper rotating plate 107 and the lower rotating plate 108 are arranged between the two indexing limit blocks 103, the locking screw 104 passes through the indexing limit block 103, the upper rotating plate 107 and the lower rotating plate 108, the compression spring 105 is installed in the upper rotating plate 107, and the center is for the locking screw 104 to pass through, the hand-tightening nut 106 is threadedly connected to one end of the locking screw 104, and is located above the upper rotating plate 107.

[0027] Among them, the positioning pin guide sleeve 110 is located between the upper rotating plate 107 and the lower rotating plate 108; the number of the rotating positioning pins 109 is two, and the two rotating positioning pins 109 are respectively located at the upper and lower ends of the positioning pin guide sleeve 110, and the two rotating positioning pins 109 are respectively located inside the upper rotating plate 107 and the lower rotating plate 108.

[0028] The two rotation locating pins 109 are respectively installed into the upper rotating plate 107 and the lower rotating plate 108, and then the locating pin guide sleeve 110 is installed into the non-spherical end of one of the rotation locating pins 109, and finally the upper rotating plate 107 and the lower rotating plate 108 are locked together.

[0029] Secondly, the two ends of the first rotating shaft 111 are respectively connected to the upper rotating plate 107 and the lower rotating plate 108, and are located on the side of the upper rotating plate 107 away from the rotation positioning pin 109; the first torsion spring 112 is sleeved on the outer side of the first rotating shaft 111, one end of the first torsion spring 112 abuts against the lower rotating plate 108, and the other end abuts against the steering transition block 113; the first rotating shaft 111 passes through the steering transition block 113, and the steering transition block 113 is located between the upper rotating plate 107 and the lower rotating plate 108; the second rotating shaft 114 is connected to the steering transition block 113, and is located on the side of the steering transition block 113 away from the first rotating shaft 111; the second torsion spring 115 is sleeved on the outer side of the second rotating shaft 114, one end of the second torsion spring 115 abuts against the steering transition block 113, and the other end abuts against the baffle mounting block 116; the second rotating shaft 114 passes through the baffle mounting block 116. The rotating shaft pressing block 117 is detachably connected to the steering transition block 113 and is located at the top of the steering transition block 113; the optical coupling baffle 118 is detachably connected to the rotating shaft pressing block 117 and is located at the top of the rotating shaft pressing block 117. The test tube baffle 119 is detachably connected to the baffle mounting block 116 and is located at a side of the baffle mounting block 116 away from the second rotating shaft 114.

[0030] First, align the holes of the baffle mounting block 116 and the steering transition block 113 according to the relative positions in the exploded view, then insert the cantilever of the second torsion spring 115- into the small holes of the baffle mounting block 116 and the steering transition block 113, and then install the second rotating shaft 114 and ensure that it can pass through the inner hole of the second torsion spring 115. The first torsion spring 112 is also assembled with the first rotating shaft 111, the lower rotating plate 108 and the steering transition block 113 in this way. The rotating shaft pressing block 117 installs the optical coupling baffle 118 above the steering transition block 113, and rotates with the steering transition block 113. The test tube baffle 119 is connected to the baffle mounting block 116 by bolts to contact the test tube and is then driven to rotate.

[0031] Secondly, the optical coupler mounting plate 120 is detachably connected to the mounting adapter plate 101 and is located on a side of the mounting adapter plate 101 close to the dividing rotating seat 102; the optical coupler 121 is fixedly connected to the optical coupler mounting plate 120 and is located on a side of the optical coupler mounting plate 120 away from the mounting adapter plate 101.

[0032] The optical coupler mounting plate 120 is used to install the optical coupler 121. By loosening the screws, the optical coupler mounting plate 120 is moved up and down along the waist-shaped hole to a suitable position, and then the screws are tightened. Even in the installed state, the coupling mounting plate can still be adjusted conveniently and quickly.

[0033] Using the low-cost mechanical structure of an adjustable test tube presence detection of the present embodiment, the test tube rack is placed at a designated position, the automatic injection mode is selected, and the test tube rack is pushed to the corresponding detection position. The motor continues to operate to drive the test tube rack to inject and force the torsion spring to deform. The optical coupling baffle 118 rotates with the rotating transition block to trigger the optical coupling 121, and then the program identifies whether the optical coupling 121 signal changes. If it changes, the injection continues, and then the optical coupling baffle 118 automatically resets with the torsion spring, and the optical coupling 121 signal changes again. In order to detect the presence of test tubes in test tube racks with different center distances, according to Figure 1 It can be seen that by changing the angle θ, the injection distances L1 and L2 can be changed, thereby realizing the presence or absence detection of test tubes at different center distances. Figure 7 (b) It can be seen that: in the initial state, due to the action of the spring, the ball end of the rotating positioning pin 109 is trapped in the groove of the indexing stop block 103, thereby limiting the free rotation of the rotating part. When the rotation angle θ needs to be adjusted, the hand nut 106 can be loosened by rotating it counterclockwise, and then the indexing stop block 103 and the indexing rotating seat 102 can be manually moved to the appropriate slot (the indexing stop block 103-19 has a series of slots). The mechanical structure is used to limit the rotation angle to prevent it from being too large, such as Figure 7 As shown in (a), the revolute pair 1 and the revolute pair 2 only process a quarter of the arc at the outer circle position rotating around the axis of rotation, and the non-arc segment will limit the rotation.

[0034] The rotation pair 1 is formed naturally after the baffle mounting block 116, the steering transition block 113 and the second rotating shaft 114 are assembled, ensuring that the baffle mounting block 116 and the steering transition block 113 can rotate relative to each other. The rotation pair 2 is formed naturally after the upper rotating plate 107, the lower rotating plate 108, the steering transition block 113 and the first rotating shaft 111 are assembled, ensuring that the upper rotating plate 107, the lower rotating plate and the steering transition block 113 can rotate relative to each other.

[0035] Among them, rotating pair 1 is used to ensure that the test tube rack can pass smoothly when it is dialed back, and rotating pair 2 is used to detect the presence of test tubes during sampling. During sampling, rotating pair 1 will not move, and related parts will rotate with rotating pair 2; when dialing back, only rotating pair 1 can rotate, and rotation limit structures are designed at the positions of the two rotating pairs to ensure that the maximum rotation angle of the two rotating pairs is 90°. The risk of missed detection and false detection is reduced, and the detection reliability is improved; the debugging difficulty is reduced, making debugging simpler; it can be used to detect the presence of test tubes in test tube racks with different center distances; it has high versatility, and this structure can be directly used on different instruments to realize the detection of the presence of test tubes; the installation is not restricted (it can be installed horizontally for detection, and it can be installed vertically for detection).

[0036] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A low-cost mechanical structure for adjustable test tube presence detection, including an adapter plate, characterized in that: It also includes an optocoupler mounting assembly and a detection assembly; The detection assembly includes an indexing rotating seat, an indexing limit block, a locking screw, a compression spring, a hand-tightening nut and a rotating member. The indexing rotating seat is detachably connected to the mounting adapter plate and is located on one side of the mounting adapter plate. There are two indexing limit blocks, and the two indexing limit blocks are respectively connected to the indexing rotating seat and are respectively located at the upper and lower ends of the indexing rotating seat. The locking screw passes through the two indexing limit blocks. The compression spring is located on the outside of the locking screw. The hand-tightening nut is threadedly connected to the locking screw and is located at one end of the locking screw close to the compression spring. The rotating member is connected to the locking screw.

2. The low-cost mechanical structure for adjustable test tube presence detection as claimed in claim 1, characterized in that: The rotating member comprises an upper rotating plate and a lower rotating plate, wherein the upper rotating plate and the lower rotating plate are respectively located between the two indexing limit blocks, the lower rotating plate is located below the upper rotating plate, and the locking screw passes through the upper rotating plate and the lower rotating plate.

3. The low-cost mechanical structure for adjustable test tube presence detection as claimed in claim 2, characterized in that: The rotating component also includes a rotating positioning pin and a positioning pin guide sleeve, and the positioning pin guide sleeve is located between the upper rotating plate and the lower rotating plate; the number of the rotating positioning pins is two, and the two rotating positioning pins are respectively located at the upper and lower ends of the positioning pin guide sleeve, and the two rotating positioning pins are respectively located inside the upper rotating plate and the lower rotating plate.

4. The low-cost mechanical structure for adjustable test tube presence detection as claimed in claim 3, characterized in that: The rotating component also includes a first rotating shaft, a first torsion spring, a steering transition block, a second rotating shaft, a second torsion spring and a baffle mounting block, wherein two ends of the first rotating shaft are respectively connected to the upper rotating plate and the lower rotating plate, and are located on the side of the upper rotating plate away from the rotation positioning pin; the first torsion spring is sleeved on the outer side of the first rotating shaft, one end of the first torsion spring abuts against the lower rotating plate, and the other end abuts against the steering transition block; the first rotating shaft passes through the steering transition block, and the steering transition block is located between the upper rotating plate and the lower rotating plate; the second rotating shaft is connected to the steering transition block and is located on the side of the steering transition block away from the first rotating shaft; the second torsion spring is sleeved on the outer side of the second rotating shaft, one end of the second torsion spring abuts against the steering transition block, and the other end abuts against the baffle mounting block; the second rotating shaft passes through the baffle mounting block.

5. The low-cost mechanical structure for adjustable test tube presence detection as claimed in claim 4, characterized in that: The rotating component also includes a shaft pressing block and an optical coupling baffle. The shaft pressing block is detachably connected to the steering transition block and is located on the top of the steering transition block; the optical coupling baffle is detachably connected to the shaft pressing block and is located on the top of the shaft pressing block.

6. The low-cost mechanical structure for adjustable test tube presence detection as claimed in claim 4, characterized in that: The rotating component further comprises a test tube baffle, which is detachably connected to the baffle mounting block and is located at a side of the baffle mounting block away from the second rotating shaft.

7. The low-cost mechanical structure for adjustable test tube presence detection as claimed in claim 1, characterized in that: The optical coupler mounting assembly includes an optical coupler mounting plate and an optical coupler. The optical coupler mounting plate is detachably connected to the mounting adapter plate and is located on a side of the mounting adapter plate close to the indexing rotating seat; the optical coupler is fixedly connected to the optical coupler mounting plate and is located on a side of the optical coupler mounting plate away from the mounting adapter plate.

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