Cover opening and closing mechanism of biological sample centrifugal tube

Abstract

The utility model relates to the technical field of biochemical experiment automation equipment, and discloses a cover opening and closing mechanism for a biological sample centrifugal tube, which is characterized in that an arc-shaped groove arranged on a vertical plate is matched with the lifting of a push-and-pull bracket, so that a pressing plate on a pressing frame can perform actions similar to manual operation; the cover opening and closing of the centrifugal tube and the receding operation after the cover opening and closing are completed, and the cover opening and closing operation of the centrifugal tube is completely automatic. The pressing frame moves along a set track, specific pressing operation on the centrifugal tube is completed, and complex actions close to manual cover opening and closing are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to biochemical experiment automation equipment technical field, especially to a biological sample centrifugal tube cover opening and closing mechanism. BACKGROUND

[0002] The rotation line flip cover type centrifugal tube is high in precision and smooth in cover opening and closing, and is widely used in biological experiments, such as cell, nucleic acid, DNA detection projects.

[0003] Referring to the drawings Figure 1 、 2 The cover opening of the centrifugal tube is realized by pressing the tube cover at the rotation line position, and after pressing, the tube cover is opened from the tube body, then the bottom of the tube cover is pressed to realize complete opening.

[0004] The commonly used automatic cover opening and closing operation process generally adopts vacuum suction cups or clamping jaws. When the cover opening and closing operation is performed by the vacuum suction cup type, the tube cover cannot be well flipped open after being opened by the suction cup. When the cover opening and closing operation is performed by the clamping jaw type, the clamping jaw cannot well clamp the thin edge of the tube cover, affecting the cover opening. INVENTION CONTENTS

[0005] The utility model discloses a biological sample centrifugal tube cover opening and closing mechanism, which moves along a set track by pressing the frame to complete specific pressing operation on the centrifugal tube, and realizes the complex action close to manual cover opening and closing.

[0006] The utility model adopts the technical scheme of:

[0007] The application discloses a centrifuge tube opening and closing mechanism for biological samples, which comprises a base, a plate card arranged at the front end of the base, a plurality of centrifuge tubes arranged on the plate card in a single row, wherein the centrifuge tube is a rotating line type flip cover centrifuge tube, the tube cover rotating line of the centrifuge tube is located at the rear end of the base, left and right vertical plates are arranged at the rear end of the base, a motor is installed on the base below the left and right vertical plates, a screw rod is installed on the motor shaft, a ball nut is arranged on the screw rod, a push-pull support is locked and installed on the ball nut, the push-pull support is in U shape, transverse slot holes are formed on the two side plates of the push-pull support, front and rear concentric arc-shaped grooves are arranged on the left and right vertical plates, a front shaft is arranged between the front arc-shaped grooves, the front shaft passes through the transverse slot holes on the two side plates of the push-pull support, a pressing frame is further installed on the front shaft, the pressing frame comprises a pressing plate at the front end and curved arms at the two sides, the curved arms are provided with rotating shaft holes at the bottom and the middle position respectively, the two curved arms of the pressing frame are located between the left and right vertical plates and the push-pull support, the middle rotating shaft hole of the curved arm passes through the front shaft, and the bottom rotating shaft hole of the curved arm is arranged in the rear arc-shaped groove through the rear shaft respectively, the radius difference between the front and rear arc-shaped grooves is smaller than the distance between the front shaft and the rear shaft, when the motor rotates the screw rod to drive the ball nut to drop from the highest position to the lowest position, the pressing frame drops, the rotating line is pressed to open the centrifuge tube flip cover, when the motor rotates the screw rod to drive the ball nut to rise from the lowest position to the highest position, the pressing frame rises, and the rotating line is pressed to close the centrifuge tube flip cover.

[0008] Further, a tail groove is formed at the rear end of the front arc-shaped groove, a top arc-shaped groove is formed at the upper end of the front arc-shaped groove, the center of the top arc-shaped groove is located at the upper end of the rear arc-shaped groove, and the radius is the distance between the front shaft and the rear shaft, when the front shaft is located in the tail groove, the pressing frame is retracted at the lowest position, and when the front shaft is located in the top arc-shaped groove, the pressing frame is retracted at the highest position.

[0009] Further, the top of the left and right vertical plates is connected with a top plate, and the top end of the screw rod is matched with the top plate through a bearing.

[0010] Further, a vertical long groove is arranged at the rear side of the left and right vertical plates, a through hole is arranged at the rear side of the two side plates of the push-pull support, the positions of the long groove and the through hole correspond to each other, a long shaft is arranged between the long groove and the through hole, and the top and bottom of the long groove are the highest and lowest strokes of the push-pull support.

[0011] Further, the length of the pressing plate of the pressing frame corresponds to the length of the single-row centrifuge tube, a plurality of longitudinal protrusions are arranged on the lower surface of the pressing plate, and each protrusion corresponds to the position of the tube cover of a single centrifuge tube.

[0012] Further, a clamping groove and a containing hole are arranged at the front end of the base, the plate card is arranged in the clamping groove, tube holes are arranged on the plate card, the tube holes correspond to the containing holes, centrifuge tubes are placed in the tube holes, and the tube bodies of the centrifuge tubes are arranged in the containing holes.

[0013] Further, the board card is provided with a positioning hole, the card slot is provided with a positioning pin, and the board card is fixedly arranged in the card slot through the positioning pin and the positioning hole.

[0014] The utility model discloses the beneficial effect is:

[0015] (1) through setting up the biaxial movement path groove of pressing frame, customizing the action of pressing frame, realize the effect that the pressing plate carries out the similar operation to human hand to pipe cover;

[0016] (2) only through one motor drive, and very small occupied space, can complete the complicated cover opening and closing operation;

[0017] (3) after cover opening and closing, enough space is reserved to facilitate the automatic operation to centrifugal tube; BRIEF DESCRIPTION OF DRAWINGS

[0018] ATTACH Figure 1 It is the structural schematic diagram when centrifugal pipe cover is closed;

[0019] ATTACH Figure 2 It is the structural schematic diagram of centrifugal pipe cover to open cover position;

[0020] ATTACH Figure 3 It is the structural schematic diagram of board card installation centrifugal pipe;

[0021] ATTACH Figure 4 It is the structural schematic diagram of base;

[0022] ATTACH Figure 5 It is the structural schematic diagram of the utility model;

[0023] ATTACH Figure 6 It is the structural schematic diagram of rear side angle of the utility model (remove long axle);

[0024] ATTACH Figure 7 It is the local enlarged view of screw rod position (remove push-pull support);

[0025] ATTACH Figure 8 It is the front view of vertical board;

[0026] ATTACH Figure 9 It is the structural schematic diagram of pressing frame;

[0027] ATTACH Figures 10-15 It is the working process schematic diagram of the utility model.

[0028] The reference signs in the drawings are as follows:

[0029] 1. centrifugal tube; 2. pipe cover;

[0030] 3. board card; 4. pipe hole;

[0031] 5. base; 6. card slot;

[0032] 7. accommodating hole; 8. positioning hole;

[0033] 9. vertical plate; 10. motor;

[0034] 11. screw rod; 12. ball nut;

[0035] 13. push-pull bracket; 14. transverse slot hole;

[0036] 15. top plate; 16. positioning sensor;

[0037] 17. front arc-shaped slot; 18. front shaft;

[0038] 19. tail slot; 20. top arc-shaped slot;

[0039] 21. rear arc-shaped slot; 22. pressing bracket;

[0040] 23. pressing plate; 24. curved arm;

[0041] 25. rotating shaft hole; 26. rear shaft;

[0042] 27. long slot; 28. through hole;

[0043] 29. long shaft; 30. protruding strip. DETAILED DESCRIPTION

[0044] The specific embodiments of the biological sample centrifugal tube cover opening and closing mechanism of the utility model will be described in detail below with reference to the accompanying drawings.

[0045] Referring to the accompanying drawings Figure 3 In order to realize the automatic cover opening and closing operation of the centrifugal tube 1, a plurality of centrifugal tubes 1 are arranged on a plate card 3 to perform batch processing of opening and closing the tube cover 2. A plurality of tube holes 4 are arranged on the plate card 3 for placing the centrifugal tubes 1, so that the head of the centrifugal tube 1 is located above the plate card 3, facilitating the cover opening and closing operation.

[0046] Referring to the accompanying drawings Figure 4 The biological sample centrifugal tube cover opening and closing mechanism of the utility model comprises a base 5, a plate card 3 is arranged at the front end of the base 5, and a plurality of centrifugal tubes 1 are arranged in a single row on the plate card 3. A clamping groove 6 and an accommodating hole 7 are arranged at the front end of the base 5, the plate card 3 is arranged in the clamping groove 6, the tube hole 4 on the plate card 3 corresponds in position to the accommodating hole 7, the centrifugal tube 1 is placed in the tube hole 4, and the tube body of the centrifugal tube 1 is placed in the accommodating hole 7. After the centrifugal tube 1 is placed, the rotating line of the tube cover 2 is located in the direction of the rear end of the base 5. In addition, a positioning hole 8 is arranged on the plate card 3, a positioning pin (not shown in the figure) is arranged in the clamping groove 6, and the plate card 3 is fixedly arranged in the clamping groove 6 through the positioning pin and the positioning hole 8.

[0047] Referring to the accompanying drawings Figure 5 , 6At the rear end of the base 5, left and right vertical plates 9 are arranged, and a motor 10 is installed on the base 5 below the left and right vertical plates 9, the motor 10 is axially installed with a lead screw 11, a ball nut 12 is arranged on the lead screw 11, the ball nut 12 is locked and installed with a push-pull bracket 13, the push-pull bracket 13 is U-shaped, and transverse slot holes 14 are formed on the two side plates of the push-pull bracket 13. A top plate 15 is connected to the top of the left and right vertical plates 9, and the top end of the lead screw 11 is matched with the top plate 15 through a bearing. When the motor 10 rotates to drive the lead screw 11 to rotate, the ball nut 12 drives the push-pull bracket 13 to realize the ascending and descending, and the forward rotation and reverse rotation of the motor 10 correspond to the ascending and descending of the push-pull bracket 13.

[0048] Referring to the accompanying drawings Figure 7 A positioning sensor 16 is installed below the left and right vertical plates 9 to record the movement position of the push-pull bracket 13 each time, which is used for position verification and data processing.

[0049] Referring to the accompanying drawings Figure 8 Two concentric arc-shaped grooves are arranged on the left and right vertical plates 9, a front arc-shaped groove 17 and a rear arc-shaped groove 21, a front shaft 18 is arranged between the front arc-shaped grooves 17, the front shaft 18 passes through the transverse slot holes 14 on the two side plates of the push-pull bracket 13, a tail groove 19 is formed at the lower end of the front arc-shaped groove 17 to the rear, and a top arc-shaped groove 20 is formed at the upper end of the front arc-shaped groove 17.

[0050] Referring to the accompanying drawings Figure 9 A pressing frame 22 is further installed on the front shaft 18, the pressing frame 22 includes a pressing plate 23 at the front end and curved arms 24 at the two sides, the curved arms 24 have bottom and middle positions respectively provided with rotating shaft holes 25, the two curved arms 24 of the pressing frame 22 are located between the left and right vertical plates 9 and the push-pull bracket 13, the middle rotating shaft hole 25 of the curved arm 24 is arranged on the front shaft 18, the bottom rotating shaft hole 25 of the curved arm 24 is arranged in the rear arc-shaped groove 21 through the rear shaft 26, and the radius difference between the front and rear arc-shaped grooves 17, 21 is less than the distance between the front shaft 18 and the rear shaft 26. The radius of the top arc-shaped groove 20 is the distance between the front shaft 18 and the rear shaft 26, when the front shaft 18 is located in the tail groove 19, the pressing frame 22 is retracted at the lowest, and when the front shaft 18 is located in the top arc-shaped groove 20, the pressing frame 22 is retracted at the highest.

[0051] A vertical long groove 27 is arranged at the rear side of the left and right vertical plates, a through hole 28 is arranged at the rear side of the two side plates of the push-pull bracket 13, the position of the long groove 27 corresponds to the position of the through hole 28, a long shaft 29 is arranged between the long groove 27 and the through hole 28, and the top and bottom of the long groove 27 are the highest and lowest strokes of the push-pull bracket 13.

[0052] The length of the pressing plate 23 of the pressing frame 22 corresponds to the length of the single-row centrifugal tube 1, and a plurality of longitudinal protrusions 30 are arranged on the lower surface of the pressing plate 23, each protrusion 30 corresponds to the position of the tube cover 2 of the single centrifugal tube 1.

[0053] Referring to the accompanying drawingsFigures 10-15 The opening process is that the motor 10 drives the push-pull bracket 13 to move from the highest position to the lowest position. When the push-pull bracket 13 is at the highest position (see Fig. 2), the front shaft 18 is at the upper end of the top arc groove 20. Because the distance between the front shaft 18 and the rear shaft 26 is the same as the radius of the top arc groove 20, the rear shaft 26 is at the top end of the rear arc groove 21 at this time. When the motor 10 drives the push-pull bracket 13 to descend, the front shaft 18 rotates in the top arc groove 20 first, and the rear shaft 26 is stationary, so that the pressing plate 23 is flipped from the highest position to the lower position (see Fig. 3). Figure 10 When the front shaft 18 descends to the end of the top arc groove 20 and the front end of the front arc groove 17, the pressing plate 23 is at the upper horizontal position above the centrifugal tube 1 (see Fig. 4). Figure 11 Then the front shaft 18 and the rear shaft 26 start to move along the front arc groove 17 and the rear arc groove 21 at the same time (see Fig. 5). Figure 12 Because the difference between the radii of the front and rear arc grooves 21 is less than the distance between the front shaft 18 and the rear shaft 26, the pressing plate 23 is raised in front and presses the position of the rotation line of the centrifugal tube 1 in the rear, so as to open the tube cover 2 of the centrifugal tube 1. With the continuous movement of the pressing plate 23, the tube cover 2 of the centrifugal tube 1 is completely opened. Finally, the front shaft 18 retreats into the tail groove 19 (see Fig. 6), so that the pressing plate 23 is retracted away from the position of the centrifugal tube 1 to leave an operation space, and the opening of the cover is completed. At this time, the push-pull bracket 13 is at the lowest position. Figure 13 14 The closing process is the opposite action of the opening. The motor 10 is reversed to move the push-pull bracket 13 upward. After the front shaft 18 comes out of the tail groove 19 (see Fig. 7), the pressing plate 23 cooperates with the opened tube cover 2. The push-pull bracket 13 continues to move upward, and the front shaft 18 and the rear shaft 26 move in the front arc groove 17 and the rear arc groove 21 respectively (see Fig. 8). Figure 15 The pressing plate 23 generates the action of closing the tube cover 2 downward, and then the pressing plate 23 is flipped upward to leave the centrifugal tube 1. Finally, the front shaft 18 rotates into the top arc groove 20 (see Fig. 9), so that the pressing plate 23 is flipped upward to leave the operation space above the centrifugal tube 1, and the closing operation is completed.

[0054] Figure 15 The long groove 27 at the rear side of the left and right vertical plates 9 limits the stroke of the push-pull bracket 13, and the transverse slot hole 14 of the push-pull bracket 13 limits the forward and backward displacement of the front shaft 18, so as to ensure the accurate movement of the pressing plate 23. After one opening or closing action is completed, the motor 10 is reversed to perform another closing and opening action. Figure 14 13 Figure 12 11

[0055]

[0056] ​​​​​​​The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, under the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.

Claims

1. A biological sample centrifuge tube cover opening and closing mechanism, characterized by: The invention comprises a base, a plate card is provided at the front end position of the base, a single row of multiple centrifuge tubes is provided on the plate card, the centrifuge tubes are rotating linear flip-top centrifuge tubes, the tube cover rotating line of the centrifuge tubes is located at the rear end direction of the base, left and right vertical plates are provided at the rear end of the base, a motor is installed on the base below the left and right vertical plates, a screw rod is installed axially of the motor, a ball nut is provided on the screw rod, the ball nut is locked and installed with a push-pull bracket, the push-pull bracket is U-shaped, and horizontal slots are formed on the two side plates of the push-pull bracket, two front and rear concentric arc grooves are provided on the left and right vertical plates, a front shaft is provided between the front arc grooves, the front shaft passes through the horizontal slots on the two side plates of the push-pull bracket, and a pressure is also installed on the front shaft The frame comprises a pressure plate at the front end and curved arms on both sides, and the curved arms have rotating shaft holes at the bottom and middle positions respectively. The two curved arms of the pressure frame are located between the left and right vertical plates and the push-pull bracket, and the middle rotating shaft hole of the curved arm is passed through the front shaft, and the bottom rotating shaft holes of the curved arms are respectively arranged in the rear arc groove through the rear shaft, and the radius difference between the front and rear arc grooves is smaller than the distance between the front shaft and the rear shaft. When the motor rotates the screw rod to drive the ball nut to descend from the highest position to the lowest position, after the pressure frame is lowered, the rotating line is pressed to open the centrifuge tube flip cover, and when the motor rotates the screw rod to drive the ball nut to rise from the lowest position to the highest position, after the pressure frame is risen, the rotating line is pressed to close the centrifuge tube flip cover.

2. The biological sample centrifuge tube cover opening and closing mechanism according to claim 1, characterized in that: A tail groove is formed rearward at the lower end of the front arc groove, and a top arc groove is formed at the upper end of the front arc groove. The center of the top arc groove is located at the upper end of the rear arc groove, and the radius is the distance between the front axle and the rear axle. When the front axle is located in the tail groove, the pressure frame is retracted at the bottom, and when the front axle is located in the top arc groove, the pressure frame is retracted at the top.

3. The biological sample centrifuge tube cover opening and closing mechanism according to claim 1, characterized in that: The tops of the left and right vertical plates are connected with a top plate, and the top end of the screw rod is fitted on the top plate through a bearing.

4. The biological sample centrifuge tube cover opening and closing mechanism according to claim 1, characterized in that: A vertical long groove is set on the rear side of the left and right vertical plates, and a through hole is set on the rear side of the two side plates of the push-pull bracket. The positions of the long groove and the through hole correspond to each other, and a long axis is set between the long groove and the through hole. The top and bottom of the long groove are the highest and lowest strokes of the push-pull bracket.

5. The biological sample centrifuge tube cover opening and closing mechanism according to any one of claims 1 to 4, characterized in that: The length of the pressing plate of the pressing frame corresponds to the length of a single row of centrifuge tubes. A plurality of longitudinal protrusions are provided on the lower surface of the pressing plate, and each protrusion corresponds to the position of a single centrifuge tube cover.

6. The biological sample centrifuge tube cover opening and closing mechanism according to any one of claims 1 to 4, characterized in that: A card slot and a receiving hole are provided at the front end of the base, the board is provided in the card slot, a tube hole is provided on the board, the tube hole corresponds to the receiving hole, a centrifuge tube is placed in the tube hole, and the body of the centrifuge tube is placed in the receiving hole.

7. The biological sample centrifuge tube cover opening and closing mechanism according to claim 6, characterized in that: A positioning hole is provided on the board, and a positioning pin is provided in the card slot. The board is fixed in the card slot through the positioning pin and the positioning hole.

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