CN101782588B - Double-needle sample sucking mechanism applicable to full-automatic blood type analytical instrument - Google Patents

Abstract

This patent relates to a double-needle sample suction mechanism suitable for automatic blood type analyzers. The mechanism adopts double-needle sample suction, including upper and lower transmission mechanisms, and horizontal transmission mechanisms. For the purpose of moving the sample suction needle and absorbing the reagent, the present invention achieves the fast and convenient sample suction effect of the double needle through a series of transmissions. The production cost can be reduced and funds can be saved.

Description

A double-needle suction mechanism suitable for automatic blood type analyzer

technical field

The invention relates to a blood type analyzer, in particular to a double-needle sample suction mechanism suitable for an automatic blood type analyzer.

Background technique

In clinical medical examination, blood type measuring instrument has a wide range of applications, its accuracy and efficiency are extremely important, and it will directly affect the safety of human life. The structure greatly limits the working speed of the instrument, affects the efficiency of blood testing, and is prone to cross-contamination.

Therefore, it has become a technical problem to be solved urgently in the technical field to develop a novel blood type measuring instrument with a double-needle suction device.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a double-needle sample suction mechanism suitable for automatic blood type analyzers, which can simultaneously suck and add samples during the working process, which not only improves the work efficiency, but also reduces the risk of cross-contamination. probability.

In order to solve the above-mentioned technical problems, the double-needle aspirating device of the blood type measuring instrument of the present invention includes a horizontal transmission mechanism and an up-and-down transmission mechanism, and is characterized in that it also includes a moving frame, a U-shaped frame, and guide rails, and the horizontal transmission mechanism is respectively connected to the The U-shaped frame is connected to the guide rail, the upper and lower transmission mechanism is connected to the horizontal transmission mechanism, one end of the guide rail is inserted and fixed in the moving frame, the other end is fixed to the U-shaped frame, and one end of the U-shaped frame It is fixed on the moving frame, and the other end is fixed on the guide rail.

The horizontal transmission mechanism includes a synchronous toothed pulley, a driven pulley, a synchronous belt, a revolving pulley, a fixed pin, a first motor, a belt pressing piece, and a moving plate. The first motor is fixedly installed on the moving frame On the top, the synchronous toothed pulley is installed on the rotating shaft of the first motor through the fixed pin, the driven pulley is installed on the lower end of the moving frame, the revolving pulley is installed on the lower end of the U-shaped frame, and the synchronous belt is connected to the synchronous toothed pulley. Between the driven pulley and the revolving pulley, the moving plate is installed on the guide rail and can slide along the guide rail. One end of the belt pressing piece is fixedly connected with the moving plate, and the other end is fixed with the timing belt.

The up and down transmission mechanism includes a second motor, a gear, a rack rack, a rack, a pin, a Z-axis optocoupler stopper, a connecting block, a sampling needle and a Z-axis optocoupler, and the second motor is installed on one side of the moving plate. On the side, the gear is connected with the rotation shaft of the second motor through a pin, the rack can slide up and down through the rack, the upper end of the connecting block is connected with the lower end of the rack, the lower end is connected with the upper end of the sampling needle, and the Z-axis optical coupling block is fixed On the side of the connecting block, the Z-axis optical coupler is fixed at the bottom of the moving plate, and the gear and the rack form a rack-and-pinion meshing transmission.

By adopting the double-needle sampling device of the present invention, when the sampling needle sucks reagents, the two needles can suck different reagents at the same time, and can inject reagents into the blood type card at the same time when adding samples, which is convenient and quick. Because the double needles add samples separately, it avoids repeated walking to absorb samples, and at the same time reduces the probability of cross-contamination of reagents, improves the quality and efficiency of sample addition, and achieves a convenient and quick sample suction and sample addition process.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a front view of the double-needle sampling device of the present invention.

Fig. 2 is a left view of the double-needle sampling device of the present invention.

Detailed ways

As shown in FIG. 1 , the double-needle aspirating device for a blood type measuring instrument of the present invention includes a horizontal transmission mechanism, an up and down transmission mechanism, a moving frame 51 , a U-shaped frame 52 and a guide rail 53 .

The horizontal transmission mechanism includes a synchronous toothed pulley 21, a driven pulley 22, a synchronous belt 23, a revolving pulley 24, a fixed pin 25, a first motor 26, a belt plate 27, a moving plate 28, and the The first motor 26 is fixedly installed on the mobile frame 51, the synchronous toothed belt pulley 21 is installed on the rotating shaft of the first motor 26 by the fixed pin 25, the driven pulley 22 is installed on the lower end of the mobile frame 21, and the rotary pulley 24 Installed on the lower end of the U-shaped frame 52, the synchronous belt 23 is connected between the synchronous toothed pulley 21, the driven pulley 22 and the revolving pulley 24, the moving plate 28 is installed on the guide rail 53, and can slide along the guide rail 53. One end of the belt piece 27 is fixedly connected with the moving plate 28 , and the other end is fixed with the timing belt 23 .

One end of the guide rail 53 is inserted and fixed in the movable frame 51 , the other end is fixed with the U-shaped frame 52 , one end of the U-shaped frame 52 is fixed on the movable frame 51 , and the other end is fixed on the guide rail 53 .

As shown in Figure 1, the described up and down transmission mechanism comprises a second motor 31, a gear 35, a rack rack 33, a rack 34, a pin 36, a Z-axis optocoupler block 37, a connecting block 38, a sampling needle 39 and Z-axis optocoupler 32, second motor 31 is installed on one side of moving plate 28, gear 35 is connected with the rotating shaft of second motor 31 by pin 36, rack 34 can slide up and down from rack rack 33, connecting block The upper end of 38 is connected with the lower end of the rack 35, the lower end is connected with the upper end of the liquid suction needle 39, the Z-axis optical coupler block 37 is fixed on one side of the connecting block 38, the Z-axis optical coupler 32 is fixed at the bottom of the moving plate 28, the gear 35 and the rack 34 forms rack and pinion meshing transmission.

When the double-needle sampling device of the present invention works, it includes the following working steps. First, move the sampling needle in the horizontal direction: turn on the horizontal transmission device, energize the first motor 26, and the first motor rotates to drive the synchronous toothed pulley 21 to rotate. The synchronous toothed pulley 21 drives the synchronous belt 23 transmission, the synchronous toothed pulley 21, the driven pulley 22, the synchronous belt 23, and the revolving pulley 24 jointly constitute the endless belt transmission, and the synchronous belt 23 is fastened on the The lower end of the moving plate 28 drives the moving plate 28 to move horizontally, so that the sampling needle 39 can reach a designated position. The driven pulley 22 can increase the wrap angle when the synchronous belt 23 contacts with the synchronous toothed pulley 21, thereby improving the belt transmission efficiency. When the sampling needle 39 reaches the designated position, the first motor 26 is powered off, and the synchronous toothed pulley 21 stops rotating, thereby making the entire horizontal transmission mechanism stop moving. Start up and down transmission mechanism now, second motor 31 is energized, and second motor 31 rotates, drives gear 35 to rotate by pin 36 transmission, drives tooth bar 34 to carry out down transmission in rack rack 33 by the meshing transmission of rack and pinion, Through the connection of the connection block 38, the sample suction needle 39 moves downwards, reaches below the liquid level of the reagent, and draws the sample. The meshing transmission of the rack and pinion is stopped, and the rack 34 is fixed, so that the liquid-absorbing needle 39 is still to absorb the sample. When the sample liquid is sucked, the second motor 31 is reversely energized, and the pin 36 drives the gear 35 to rotate in the reverse direction. The connection of the connection block 38 makes the sampling needle 39 move upwards and leaves the reagent liquid surface. When the Z-axis optocoupler block 37 blocks the Z-axis optocoupler 32, the second motor 31 is powered off and stops working, thereby stopping the up and down transmission mechanism Work, the sample suction needle completes the sample suction work.

As another embodiment of the present invention, since the double-needle suction mechanism adopts a separate belt drive, it can realize double-needle equidistant or unequal distance sample suction. This structure can speed up sample suction and improve work efficiency. At the same time, it is also convenient for the selection of reagent racks and saves production costs.

Claims (1)

1. double-needle sample sucking mechanism that is applicable to full-automatic blood type analytical instrument comprises horizontal gear train, gear train up and down, it is characterized in that; Also comprise movable stand (51), U type frame (52), guide rail (53); Said horizontal gear train is connected with guide rail (53) with said U type frame (52) respectively; Said gear train up and down is connected with said horizontal gear train, and said guide rail (53) one ends insert and are fixed in the said movable stand (51), and the other end and said U type frame (52) fix; Said U type frame (52) one ends are fixed on the said movable stand (51), and the other end is fixed on the said guide rail (53);

Described horizontal gear train comprises synchronizing jugged belt wheel (21), driven pulley (22), band (23) synchronously; Revolution belt wheel (24), fixed pin (25), first motor (26); Pressure zone sheet (27), movable plate (28), described first motor (26) are fixedly mounted on the said movable stand (51); Said synchronizing jugged belt wheel (21) is installed on the rotation axis of said first motor (26) through said fixed pin (25); Said driven pulley (22) is installed in the lower end of said movable stand (21), and said revolution belt wheel (24) is installed in said U type frame (52) lower end, and said synchronous band (23) is connected between said synchronizing jugged belt wheel (21) and said driven pulley (22) and the said revolution belt wheel (24); Said movable plate (28) is installed on the said guide rail (53); And along said guide rail (53) slidably, said pressure zone sheet (27) one ends are fixedly connected with said movable plate (28), and the other end and said synchronous band (23) are fixing;

Described gear train up and down comprises second motor (31), gear (35), rack frame (33); Tooth bar (34), pin (36), Z axle optocoupler catch (37); Contiguous block (38), suction needle (39) and Z axle optocoupler (32), said second motor (31) is fixed on a side of said movable plate (28); Said gear (35) is connected through said pin (36) with the rotation axis of said second motor (31), and through sliding up and down, said contiguous block (38) upper end is connected with the lower end of said tooth bar (35) said tooth bar (34) from said rack frame (33); The lower end is connected with said suction needle (39) upper end; Said Z axle optocoupler catch (37) is fixed on said contiguous block (38) one sides, and said Z axle optocoupler (32) is fixed on said movable plate (28) bottom, gear (35) and tooth bar (34) formative gear tooth bar engaged transmission.

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