A decap mechanism and a sample analyzer

Abstract

The utility model discloses a kind of uncovering mechanism and sample analyzer, uncovering mechanism includes: jaw fixing seat, jaw, sliding block, rotary disc and first driving assembly;Jaw is installed on the jaw fixing seat along radial sliding by sliding block, the surface of sliding block is provided with boss, the lower surface of rotary disc is provided with helical line, boss and helical line are pasted;First driving assembly is used to drive the rotary disc rotation, boss is along the radial sliding of the jaw fixing seat with the rotation of the helical line, to drive the sliding block sliding, so that jaw is mutually close or dispersed.Due to helical line is smoothly changed, boss is subjected to the thrust from helical line more gently, so that sliding block can gently slide in radial, sliding block drives jaw to close or disperse gently, to solve the problem of unstable in the prior art when jaw opens and closes.

Description

Technical Field

[0001] This utility model belongs to the field of in vitro diagnostic instrument technology, specifically relating to a cap-opening mechanism and a sample analyzer. Background Technology

[0002] In the field of in vitro diagnostic instruments, a capping mechanism is typically used to open sample tubes. Existing capping mechanisms typically include at least capping grippers and a first drive assembly for opening and closing the grippers. (Refer to...) Figure 1 The schematic diagram shows that the opening gripper includes at least three claws 01, which are confined to slide within a plane. The output shaft of the first drive assembly is connected to a push-pull head 02, which has at least three inclined surfaces. The connecting ends of the at least three claws 01 are all provided with inclined grooves that match and connect with the inclined surfaces. When the first drive assembly drives the push-pull head to move vertically, the at least three claws slide along the inclined surfaces under the drive of the push-pull head 02, so that the at least three claws move closer to or further away from each other.

[0003] However, when the above structure is applied to a smaller sample analyzer, the gripper itself is small. In this case, after the gripper slides into place along the inclined plane under the action of the push-pull head, it may cause an impact on the gripper, resulting in instability. Utility Model Content

[0004] This utility model discloses a lid-opening mechanism and a sample analyzer to solve the instability problem existing in the prior art.

[0005] A first aspect of this utility model provides a lid-opening mechanism, comprising:

[0006] The gripper holder has a cavity.

[0007] The gripper is radially slidably mounted on the gripper fixing seat via a slider, and the surface of the slider is provided with protrusions.

[0008] A rotating disk is disposed in the cavity of the clamp fixing seat. The lower surface of the rotating disk is provided with a spiral pattern that spirals from the edge of the rotating disk toward the center of the rotating disk. The protrusion is in contact with the spiral pattern.

[0009] The first driving component is used to drive the rotating disk to rotate. The protrusion slides radially along the gripper fixing seat as the spiral pattern rotates, so as to drive the slider to slide, causing the grippers to move closer together or disperse.

[0010] Optionally, the slider surface is provided with a plurality of protrusions, at least one of which is in contact with the inner edge of the spiral pattern so that the spiral pattern pushes the protrusion to slide toward the central axis of the gripper fixing seat, and at least one protrusion is in contact with the outer edge of the spiral pattern so that the spiral pattern pushes the protrusion to slide away from the central axis of the gripper fixing seat.

[0011] Optionally, the gripper fixing seat includes: a chuck fixing seat, a slider fixing plate and a pressure plate connected in sequence. The slider fixing plate is a circular tray shape. The slider fixing plate and the pressure plate are provided with a slide track in the radial direction. The side of the slide track is provided with a groove. The protrusions on both sides of the slider are engaged in the groove so that the slider can slide along the slide track.

[0012] Optionally, the gripper includes a connecting block fixed to the bottom of the slider and a claw portion perpendicular to the connecting block. The edge of the connecting block has a recess, and a limiting stud is provided at the bottom edge of the pressure plate. The limiting stud is used to abut against the side of the recess when the slider slides to the outermost edge.

[0013] Optionally, a limiting cylinder is provided at the middle position of the pressure plate, and the limiting cylinder is used to abut against the claw when the gripper is closed.

[0014] Optionally, it also includes: a fixing plate and a second drive motor, the second drive motor being fixed on the fixing plate, and its output end being fixedly connected to the chuck fixing seat for driving the gripper fixing seat to rotate around the axis.

[0015] Optionally, it also includes: a support plate and a third drive assembly, wherein the fixed plate is slidably mounted on the support plate, and the third drive assembly is used to drive the fixed plate to move up and down on the support plate.

[0016] Optionally, the first drive assembly includes: a first drive motor stacked above the second drive motor and a drive shaft passing through the second drive motor, the top end of the drive shaft being fixedly connected to the output end of the first drive motor, and the end end passing through the chuck mounting base and being fixedly connected to the rotary disk.

[0017] A second aspect of this utility model provides a sample analyzer, including a cover-opening mechanism provided in any implementation of the first aspect.

[0018] As can be seen from the above technical solution, this utility model provides a cover opening mechanism and a sample analyzer. The inner or outer edge of the spiral pattern contacts the protrusion. When the rotating disk rotates under external force, the protrusion receives an inward or outward thrust from the spiral pattern, thus allowing the protrusion to slide radially along the gripper fixing seat. Because the spiral pattern is smoothly changing, the thrust received by the protrusion from the spiral pattern is relatively gentle, allowing the slider to slide smoothly radially. The slider drives the grippers to smoothly approach or disperse, thereby solving the problem of instability when the grippers open and close in the prior art. Attached Figure Description

[0019] Figure 1 A schematic diagram of the opening gripper provided by the prior art;

[0020] Figure 2 This is a schematic diagram of the main structure of a lid-opening mechanism provided in this embodiment;

[0021] Figure 3 This is a disassembly diagram of the gripper fixing seat provided in this embodiment;

[0022] Figure 4 This is a schematic diagram of the structure of the rotating disk provided in this embodiment;

[0023] Figure 5 This is a partial cross-sectional view of a lid-opening mechanism provided in this embodiment;

[0024] Figure 6 This is a disassembly diagram of the gripper and gripper fixing seat provided in this embodiment;

[0025] Figure 7 for Figure 2 A sectional view;

[0026] Figure 8 This is a schematic diagram of the structure of the third driving component provided in this embodiment.

[0027] Reference numerals: 01-Claw; 02-Push-Pull Head; 1-Claw Fixing Seat; 2-Claw; 3-Slider; 4-Rotating Disk; 5-First Drive Assembly; 6-Fixing Plate; 7-Second Drive Motor; 8-Support Plate; 9-Third Drive Assembly; 11-Cavity; 12-Chuck Fixing Seat; 13-Slider Fixing Disk; 14-Pressure Plate; 15-Slide Track; 21-Connecting Block; 22-Claw Part; 31-Protrusion; 32-Protrusion; 41-Helical Pattern; 51-First Drive Motor; 52-Drive Shaft; 81-Slide Rail; 91-Third Drive Motor; 92-Lead Screw; 93-Lead Screw Nut; 94-Lead Screw Nut Fixing Block; 95-Slider Fixing Seat; 121-Body; 122-Cylindrical Part; 141-Limiting Stud; 142-Limiting Cylinder; 151-Slide Groove; 211-Recess. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Reference Figure 2 and Figure 3 The schematic diagram shown illustrates that this application provides a cover-opening mechanism, including: a gripper fixing seat 1, grippers 2, a slider 3, a rotating disk 4, and a first driving assembly 5. The gripper fixing seat 1 has a cavity 11. The grippers 2 are radially slidably mounted on the gripper fixing seat 1 via the slider 3. The surface of the slider 3 is provided with protrusions 31. The rotating disk 4 is disposed within the cavity 11 of the gripper fixing seat 1. The lower surface of the rotating disk 4 is provided with a spiral pattern 41 that spirals from the edge of the rotating disk 4 towards the center of the rotating disk 4. The protrusions 31 are in contact with the spiral pattern 41. The first driving assembly 5 is used to drive the rotating disk 4 to rotate. The protrusions 31 slide radially along the gripper fixing seat 1 as the spiral pattern 41 rotates, thereby causing the slider 3 to slide, so that the grippers 2 move closer together or disperse.

[0030] The clamps 2 are provided in at least two parts. In this embodiment, three clamps 2 are provided. After the three clamps 2 come together, they can form a circular area. The circular area fits against the cap of the sample tube, thereby fixing the cap.

[0031] Reference Figure 4 The schematic diagram shows a spiral pattern 41 protruding from the lower surface of the rotating disk 4. The spiral pattern 41 has a certain height and thickness. The edge of the spiral pattern 41 facing the center is called the inner edge, and the edge of the spiral pattern 41 facing away from the center is called the outer edge. The distances from both the inner and outer edges to the center change smoothly. The inner or outer edge of the spiral pattern 41 contacts the protrusion 31. When the rotating disk 4 rotates under the action of external force, the protrusion 31 is pushed inward or outward by the spiral pattern 41. Therefore, the protrusion 31 can slide radially along the gripper fixing seat 1. Because the spiral pattern 41 changes smoothly, the pushing force on the protrusion 31 from the spiral pattern 41 is relatively gentle, allowing the slider 3 to slide smoothly in the radial direction. The slider 3 drives the gripper 2 to move closer or further apart smoothly, thus solving the problem of instability when the gripper opens and closes in the prior art.

[0032] In this embodiment, the spiral pattern 41 has at least two turns of pattern, as shown in the reference. Figure 5The schematic diagram shows that the surface of the slider 3 is provided with a plurality of protrusions 31. At least one protrusion 31 is in contact with the inner edge of the spiral pattern 41 so that the spiral pattern 41 pushes the protrusion 31 to slide towards the central axis of the gripper fixing seat 1. At least one protrusion 31 is in contact with the outer edge of the spiral pattern 41 so that the spiral pattern 41 pushes the protrusion 31 to slide away from the central axis of the gripper fixing seat 1.

[0033] The protrusions that mate with the inner edge and those that mate with the outer edge can be the same protrusion or different protrusions. Specifically, if protrusion 31 is located in the middle of the two rings of texture, assuming the rotating disk 4 rotates clockwise, protrusion 31 receives a pushing force from the inner edge, and when it rotates counterclockwise, it receives a pushing force from the outer edge. It is understood that the thickness of protrusion 31 is less than the width of the two rings of texture, allowing it to pass smoothly between them. The thickness of protrusion 31 needs to be determined based on the width of the texture and its location, and is not limited here. In this embodiment, the three sliders can slide synchronously towards the central axis of the gripper fixing seat 1, or synchronously away from the central axis of the gripper fixing seat 1.

[0034] Reference Figure 6 The schematic diagram shows that the gripper fixing seat 1 includes: a chuck fixing seat 12, a slider fixing plate 13, and a pressure plate 14 connected in sequence. The slider fixing plate 13 is a circular tray shape. The slider fixing plate 13 and the pressure plate 14 are provided with a slide rail 15 in the radial direction. The slide rail 15 is provided with a groove 151 on the side. The protrusions 32 on both sides of the slider 3 are engaged in the groove 151 so that the slider 3 can slide along the slide rail 15.

[0035] In this embodiment, the slide 15 passes through the bottom of the slider fixing plate 13 and the pressure plate 14, the protrusion 31 on the top of the slider 3 extends into the cavity 11 of the claw fixing seat 1, and can cooperate with the spiral pattern 41 located in the cavity 11; the bottom of the slider 3 protrudes from the pressure plate 14 so as to install the claw 2.

[0036] Reference Figure 6The schematic diagram shows that the gripper 2 includes a connecting block 21 fixed to the bottom of the slider 3 and a claw portion 22 perpendicular to the connecting block 21. The gripper 2 can slide along the slide rail 15 towards the central axis of the gripper fixing seat 1 to the limit position of the slide rail 15. When the limit position is reached, the end of the connecting block 21 abuts against the end of the slide rail 15. However, when the gripper 2 slides along the slide rail 15 towards the outer edge of the gripper fixing seat 1, the connecting block 21 is prone to disengaging from the slide rail 15, so an outer limit is required. In one possible implementation, the edge of the connecting block 21 has a recess 211, and the bottom edge of the pressure plate 14 is provided with a limit stud 141, which is used to abut against the side of the recess 211 when the slider 3 slides to the outermost edge.

[0037] The cap-opening mechanism provided in this embodiment is used to grip the cap of the sample tube. Considering that when the grippers grip the cap, the inner diameter of the three grippers 2 when closed is equal to the outer diameter of the cap, an inner limit can be set for the grippers 2. Figure 6 The schematic diagram shows that a limiting cylinder 142 is provided at the middle position of the pressure plate 14. The limiting cylinder 142 is used to abut against the claw 22 when the gripper 2 is closed.

[0038] The cap-opening mechanism provided in this embodiment is used in the cap-opening process. During the cap-opening process, the sample tube body is first fixed by the fixing mechanism, and then the cap of the sample tube is gripped by the gripper. Then, while rotating and rising, the cap and the tube body can be separated to complete the cap-opening operation.

[0039] Reference Figure 7 The schematic diagram shows that, in order to realize the rotation action after the gripper picks up the sample tube, the opening mechanism provided in this embodiment also includes: a fixing plate 6 and a second drive motor 7. The second drive motor 7 is fixed on the fixing plate 6, and its output end is fixedly connected to the chuck fixing seat 12 to drive the gripper fixing seat 1 to rotate around the axis.

[0040] In this embodiment, the chuck fixing seat 12 includes a body 121 and a cylindrical portion 122 protruding from the body 121. The cylindrical portion 122 is cylindrical, and its central axis coincides with the central axis of the gripper fixing seat 1. The output end of the second drive motor 7 is sleeved inside the cylindrical portion 122 and fixedly connected to it. Under the drive of the second drive motor 7, the chuck fixing seat 12 rotates around its axis, thereby driving the gripper fixing seat 1 to rotate. Compared with the traditional technology that uses a drive motor to drive a synchronous belt, which in turn drives the gripper mechanism to rotate, the solution provided in this embodiment has a simpler structure, reduces space occupation, and is conducive to miniaturization.

[0041] During the opening process, the cap needs to be clamped while rotating and rising. Therefore, the opening mechanism provided in this embodiment also includes a support plate 8 and a third drive component 9. The fixed plate 6 is slidably installed on the support plate 8, and the third drive component 9 is used to drive the fixed plate 6 to rise and fall on the support plate 8.

[0042] Reference Figure 8 The schematic diagram shown illustrates that in this embodiment, the fixing plate 6 is mounted on the support plate 8 via a slide rail slider structure. Specifically, the support plate 8 is provided with a slide rail 81 and a vertical slider (not shown in the figure), and the vertical slider can slide along the slide rail 81 in the vertical direction.

[0043] The third drive assembly 9 includes a third drive motor 91, a lead screw 92 fixedly connected to the output end of the third drive motor 91, a lead screw nut 93 sliding on the lead screw 92, a lead screw nut fixing block 94 fixedly connected to the lead screw nut 93, and a slider fixing seat 95. The slider fixing seat 95 is fixedly connected to the vertical slider and also fixedly connected to the fixing plate 6. In one possible implementation, the support plate 8 has an elongated opening in the vertical direction, and slide rail slider structures are respectively arranged on both sides of the opening. The lead screw nut fixing block 94 is fixedly connected to the vertical sliders on both sides of the opening, and the slider fixing seat 95 has an extension extending into the opening, which is fixedly connected to the fixing plate 6 by bolts.

[0044] In this embodiment, as Figure 7 As shown, the first drive assembly 5 includes: a first drive motor 51 stacked above the second drive motor 7 and a drive shaft 52 passing through the second drive motor 7. The top end of the drive shaft 52 is fixedly connected to the output end of the first drive motor 51, and its end passes through the chuck fixing seat 12 and is fixedly connected to the rotating disk 4. A bearing is provided between the rotating disk 4 and the slider fixing disk 13 so that the rotating disk 4 can rotate freely. The second drive motor 7 is fixed to the fixing plate 6 by a support column and is stacked above the first drive motor 51. The stacked arrangement of the first drive motor 51 and the second drive motor 7 can reduce the overall volume and is beneficial for miniaturization.

[0045] This embodiment also provides a sample analyzer, which includes... Figure 2 The sample analyzer provided in this embodiment has all the technical effects of the aforementioned opening mechanism, regardless of the implementation method, and will not be described again here.

[0046] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the scope of the claims of this utility model pending approval.

Claims

1. A lid-opening mechanism, characterized in that, include: The gripper holder has a cavity. The gripper is radially slidably mounted on the gripper fixing seat via a slider, and the surface of the slider is provided with protrusions. A rotating disk is disposed in the cavity of the clamp fixing seat. The lower surface of the rotating disk is provided with a spiral pattern that spirals from the edge of the rotating disk toward the center of the rotating disk. The protrusion is in contact with the spiral pattern. The first driving component is used to drive the rotating disk to rotate. The protrusion slides radially along the gripper fixing seat as the spiral pattern rotates, so as to drive the slider to slide, causing the grippers to move closer together or disperse.

2. The lid-opening mechanism according to claim 1, characterized in that, The slider surface is provided with a plurality of protrusions, at least one of which is in contact with the inner edge of the spiral pattern so that the spiral pattern pushes the protrusion to slide toward the central axis of the gripper fixing seat, and at least one protrusion is in contact with the outer edge of the spiral pattern so that the spiral pattern pushes the protrusion to slide away from the central axis of the gripper fixing seat.

3. The lid-opening mechanism according to claim 1, characterized in that, The gripper fixing base includes: a chuck fixing base, a slider fixing plate and a pressure plate connected in sequence. The slider fixing plate is a circular tray shape. The slider fixing plate and the pressure plate are provided with a slide track in the radial direction. The side of the slide track is provided with a groove. The protrusions on both sides of the slider are engaged in the groove so that the slider can slide along the slide track.

4. The lid-opening mechanism according to claim 3, characterized in that, The gripper includes a connecting block fixed to the bottom of the slider and a claw portion perpendicular to the connecting block. The edge of the connecting block has a recess. A limiting stud is provided at the bottom edge of the pressure plate. The limiting stud is used to abut against the side of the recess when the slider slides to the outermost edge.

5. The lid-opening mechanism according to claim 4, characterized in that, A limiting cylinder is provided at the middle position of the pressure plate, and the limiting cylinder is used to abut against the claw when the gripper is closed.

6. The lid-opening mechanism according to claim 3, characterized in that, Also includes: The system includes a fixed plate and a second drive motor. The second drive motor is fixed on the fixed plate, and its output end is fixedly connected to the chuck fixing seat to drive the gripper fixing seat to rotate around the axis.

7. The lid-opening mechanism according to claim 6, characterized in that, Also includes: The support plate and the third drive assembly are provided. The fixed plate is slidably mounted on the support plate, and the third drive assembly is used to drive the fixed plate to move up and down on the support plate.

8. The lid-opening mechanism according to claim 6, characterized in that, The first drive assembly includes: a first drive motor stacked above the second drive motor and a drive shaft passing through the second drive motor. The top end of the drive shaft is fixedly connected to the output end of the first drive motor, and its end passes through the chuck mounting base and is fixedly connected to the rotary disk.

9. A sample analyzer, characterized in that, Includes the opening mechanism as described in any one of claims 1 to 8.

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