RU135133U1 - Sampler - Google Patents

Abstract

The utility model relates to the components of medical laboratory equipment and is intended for quick and accurate positioning of the needle relative to the tube for subsequent sampling of the dosing of small volumes of liquid biological materials (blood, blood serum, blood plasma, urine, cerebrospinal fluid) for electrochemical methods of analysis, for sampling in automatic analyzing device and can be used to create automatic hematological analyzers.

The device provides enhanced functionality and improved performance by rotating the manipulator shelf with a sampling needle 360 degrees around its axis and lowering / raising to the desired height, reducing overall dimensions in width and length. Due to the use of a sleeve with a hexagonal hole and a hexagon, the engine with the tube is located on the same axis, which allows you to achieve torque without using a belt drive.

The required technical result is achieved in that the device containing the shelf with the needle is in the upper zero position at rest, if necessary, turn the shelf in the upper position by a predetermined angle, the stepper motor is turned on, which is responsible for the rotation of the manipulator shelf. Rotational movement from the engine through the coupling is transmitted to a hexagonal rod, which is interfaced with a sleeve with a hexagonal hole, mounted on the pipe on which the shelf is located. When rotating the hexagonal rod, the pipe rotates with a shelf fixed to it. Thus, the shelf can rotate about the main axis regardless of the direction of rotation. After that, the stepper motor is switched on, which is responsible for lowering / raising the manipulator shelf using a ball screw transmission (ball screw) connected with the help of a plate with a pipe, the manipulator shelf lowers to the required height. The hexagonal rod in this case serves as a guide for the sleeve with a hexagonal hole. Further, through the needle, the selection / dosing of the liquid; the engine is turned on, and the shelf rises to the upper position, then rotational movement is transmitted to the pipe with the shelf from the other stepper motor through the hexagonal rod and the shelf is rotated to the required angle, or it occupies the initial - zero position. If you need to lower the shelf, without turning in the upper position, the engine connected to the ball screw is turned on, and the shelf drops to a predetermined height for dispensing or withdrawing fluid. After that, it either turns at a certain angle or rises to the upper position and already there it turns at a given angle, where, if necessary, the shelf can go down to dispense / withdraw liquid, or carry out these operations in the upper position. If the manipulator works without stops, the shelf with the needle occupies the upper zero position only before turning off the manipulator.

Description

The utility model relates to the components of medical laboratory equipment and is intended for quick and accurate positioning of the needle relative to the tube for subsequent selection and dosing of small volumes of liquid biological materials (blood, blood serum, blood plasma, urine, cerebrospinal fluid) for electrochemical methods of analysis, for sampling in an automatic analyzing device and can be used to create automatic hematological analyzers.

In the field of hematology, there are many devices for taking blood samples and for performing analysis. Samples, as a rule, are contained in a test tube until they are extracted, at least partially, by an automatic device for their subsequent analysis in this device. Samples are removed with a sampling needle, which is moved horizontally between the tube and one or more containers in which the analysis of the samples is carried out, followed by possible dilution; a sampling needle is lowered into said containers and distributes the sample thus extracted.

A known device for analysis comprising a cartridge for analysis, containing at least one cell and a pipette that can be placed in at least one of these cells; a holder configured to place a specified cartridge therein; a moving mechanism configured to place said pipette into selected cells of said cartridge; gas pressure application means configured to attach to said pipette in order to cause fluid to flow through said membrane; and a radiation sensor for detecting radiation from a cell of said cartridge or from said pipette. [RU 2282196, C2, G01N 35/00, 08/20/2006].

The disadvantage of this device is the moving mechanism, designed to place the pipette in the selected cell cartridge, because he is not mobile enough.

The closest in technical essence is a device containing a sampling needle for sampling and means for bringing the sampling needle into translational motion. The sampling needle is mounted on a swing arm, which is movable around its own axis and forms an angle with the sampling needle. The means for moving the sampling needle includes a slide and a belt stretched in the radial direction between the drive pulley and the idler pulley. In this case, one of these pulleys serves as a hinge on the swing arm. The slide is made with the possibility of translational movement relative to the swinging lever [RU 2338172, C2, G01N 1/00, G01N 30/24, 2008.11.10].

The disadvantage of this device is that to extract the sample, the sampling needle can either be moved downward or moved upward. For greater technical functionality, it is necessary to move the needle of the sampler not only directed down or up, but also around its axis.

The required technical result is to expand the functionality and improve performance by rotating the manipulator shelf with a sampling needle 360 degrees around its axis and lowering / raising to the desired height, reducing overall dimensions in width and length. Through the use of a sleeve with a hexagonal hole and a hexagonal rod, the engine with the tube is located on the same axis, which allows you to achieve torque without using a belt drive.

The required technical result is achieved in that the device containing the shelf with the needle is in the upper zero position at rest, if necessary, turn the shelf in the upper position by a predetermined angle, the stepper motor is turned on, which is responsible for the rotation of the manipulator shelf. Rotational movement from the engine through the coupling is transmitted to a hexagonal rod, which is interfaced with a sleeve with a hexagonal hole, mounted on the pipe on which the shelf is located. When rotating the hexagonal rod, the pipe rotates with a shelf fixed to it. Thus, the shelf can rotate about the main axis regardless of the direction of rotation. After that, the stepper motor is switched on, which is responsible for lowering / raising the manipulator shelf using a ball screw transmission (ball screw) connected with the help of a plate with a pipe, the manipulator shelf lowers to the required height. The hexagonal rod in this case serves as a guide for the sleeve with a hexagonal hole. Further, through the needle, the selection / dosing of the liquid; the engine is turned on, and the shelf rises to the upper position, then rotational movement is transmitted to the pipe with the shelf from the other stepper motor through the hexagonal rod and the shelf is rotated to the required angle, or it occupies the initial - zero position. If you need to lower the shelf, without turning in the upper position, the engine connected to the ball screw is turned on, and the shelf drops to a predetermined height for dispensing or withdrawing fluid. After that, it either turns at a certain angle or rises to the upper position and already there it turns at a given angle, where, if necessary, the shelf can go down to dispense / withdraw liquid, or carry out these operations in the upper position. If the manipulator works without stops, the shelf with the needle occupies the upper zero position only before turning off the manipulator.

The drawings show the Sampler: Figure 1 - the main components. Figure 2 - the main components.

The sampler contains a supporting structure - a frame 1, on which two stepper motors 2 are fixed, connected by means of couplings 3 with a hexagonal rod 4 and a ball screw 5, which in turn are fixed on the frame 1 with bearings 6, which ensure their rotation; on the ball screw nut, a plate 7 is rigidly fixed, connected to the pipe 8, at the end of which a sleeve with a hexagonal hole 9 is welded; the pipe is inserted into the bearing 10 and fixed by the sleeve 11 in the required position; the sliding of the pipe 8 during rotational and reciprocating motion provides a sliding bearing 12, mounted in the frame 1; the guide for the pipe 8 is a hexagonal rod 4, mating with a sleeve with a hexagonal hole 9, mounted on the pipe 8; on the opposite (from the sleeve with a hexagonal hole 9) end of the pipe 8, the manipulator shelf 13 is attached and fixed in a predetermined position; on the shelf 13, in turn, is located the needle 14.

The proposed device operates as follows. The shelf 13 with the needle 14 is in the upper zero position at rest. If it is necessary to rotate the shelf 13 in the upper position by a predetermined angle, the stepper motor is turned on, which is responsible for the rotation of the manipulator shelf. Rotational movement from the engine through the coupling 3 is transmitted to the hexagonal rod 4, which is interfaced with the sleeve with the hexagonal hole 9, mounted on the pipe 8, on which the shelf 13. When the hexagonal rod 4 is rotated, the pipe 8 rotates with the shelf 13 fixed on it. Thus, the shelf 13 can rotate relative to the main axis regardless of the direction of rotation. After that, the stepper motor is turned on, which is responsible for lowering / raising the manipulator shelf 13 by means of a ball screw transmission (ball screw) 5 connected by means of the plate 7 to the pipe 8, the manipulator shelf 13 lowers to the required height. The hexagonal rod 4 in this case serves as a guide for the sleeve with a hexagonal hole 9. Then, through the needle 14, liquid is taken / dosed; the engine is turned on, and the shelf 13 rises to the upper position, then rotational movement is transmitted to the pipe 8 with the shelf from the other stepper motor through the hexagonal rod 4 and the shelf 13 is rotated to the required angle, or it occupies the initial - zero position. If you want to lower the shelf 13, without turning in the upper position, the engine connected to the ball screw is turned on, and the shelf 13 is lowered to a predetermined height for dispensing or taking fluid. After that, it either turns at a certain angle or rises to the upper position and already there it turns at a predetermined angle, where, if necessary, the shelf 13 can go down to dispense / withdraw liquid, or carry out these operations in the upper position. If the manipulator operates without stops, the shelf 13 with the needle 14 occupies the upper zero position only before turning off the manipulator.

Thus, due to the proposed technical solution, the required technical result is achieved by expanding the functionality and improving performance by rotating the manipulator shelf with the sampling needle 360 degrees around its axis and lowering / raising to the required height, reducing overall dimensions in width and length. Through the use of a bushing with a hexagonal hole and a hexagonal rod, the engine with the tube is located on the same axis, which allows you to achieve torque without using a belt drive.

Claims (3)

1. A sampler containing the main components: a supporting structure - a frame on which two stepper motors are fixed, connected by means of couplings with a hexagonal rod and a ball screw transmission, which, in turn, are mounted on the frame using bearings that ensure their rotation, on a ball screw nut is rigidly fixed to a plate connected to a pipe, at the end of which a sleeve with a hexagonal hole is welded; the pipe is inserted into the bearing and fixed by the sleeve in the required position; sliding of the pipe during rotational and reciprocal motion provides a sliding bearing fixed in the frame; characterized in that the shelf with a needle mounted on the pipe rotates through the interaction of the hexagonal rod and the sleeve with a hexagonal hole fixed on the pipe. 2. The sampler according to claim 1, characterized in that the shelf of the manipulator with the sampling needle is made to rotate 360º around its axis and with the possibility of lowering / raising to the desired height. 3. The sampler according to claim 1, characterized in that the engine with the tube is located on the same axis through the use of a sleeve with a hexagonal hole and a hexagonal rod.

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