JPS63104654A - Device for partly injecting trace amount of liquid - Google Patents

Abstract

PURPOSE:To partly inject a trace amt. of liq. and to eliminate contamination by providing a means for detecting the specified interface position of the liq. in a tube, a means for sending out the tube, and a means for cutting the tip of the tube. CONSTITUTION:The tube 5 is sent out by a delivery roller 10 to suck a liq. chemical 14. A driving motor 1 is driven to a specified position while detecting the interface moving distance by the interface detector 8, and then the tube 5 is pulled in by the delivery roller 10. The tube 5 is sent out by the roller 10 to a discharge vessel to discharge the chemical, the driving motor 1 is driven a slightly longer distance than that in suction to a specified position while detecting the interface moving distance with the interface detector 8, and then the tube 5 is pulled in by the detecting roller 10. The tube 5 is sent out by the delivery roller 10, and cut by a cutter 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dispensing device for dispensing trace amounts of liquids such as enzymes and isotopes.

[Summary of the invention]

The present invention uses a tube as a liquid holder in a liquid dispensing device, and manages the volume of the liquid by the inner diameter and length of the tube, thereby making it possible to dispense a small amount of liquid accurately. It is something. Furthermore, by cutting off the tip of the tube that comes into contact with the liquid, contamination with other liquids is prevented.

[Conventional technology]

Conventionally, a microsyringe or a dispensing device using a removable tip as shown in FIG. 2 has been used.

[Problem that the invention seeks to solve]

Dispensing devices such as those described above have the disadvantages that when dispensing a liquid, they come into contact with other liquids, causing contamination, and that it is difficult to accurately dispense ml of liquid. The present invention enables the dispensing of minute amounts of liquid and eliminates the risk of contamination! The purpose is to obtain a liquid dispensing device.

[Means for solving problems]

In order to solve the above problems, the present invention provides a syringe having a piston, a piston driver that drives the piston, a liquid contained in the syringe, a tube connected to the syringe, and a liquid contained in the syringe. a first detection means for detecting that the liquid interface is at a first predetermined position;
The apparatus includes a second detection means for detecting that the interface of the liquid in the tube is at a second predetermined position, a feeding means for feeding the tube, and a cutting means for cutting the tip of the tube.

[Operation] According to the above configuration, the liquid to be dispensed is sucked from the tip of the tube by driving the piston and detecting the interface of the liquid, and then driving the piston in the opposite direction to aspirate the liquid to be dispensed from the tip of the tube. Discharges by detecting the liquid interface.

The tube used for liquid aspiration is pumped out and then cut.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. 1st
In the figure, a drive motor 1 for driving a piston 2 is attached to a syringe 3, and a tube 5 is connected via a connector 4. A liquid 6 is put inside the syringe 3 and a part of the tube 5, and the interface of the liquid 6 is detected by an interface detector 8.
within the detection range. The tube 5 is further installed via a feed roller 10, a guide 11, and a cutter. FIG. 3 shows an example of how the tube is stored, and is installed between the connector 4 and the interface detection device 8.

Next, its operation will be explained. The tube 5 is sent out by a delivery roller 10 in order to suck the chemical solution 14. The drive motor 1 is driven to a predetermined position while the interface detector 8 detects the interface movement distance, and then the tube 5 is drawn in by the delivery roller IO. In order to discharge, the tube 5 is sent out to the discharge container by the delivery roller 10, and while the interface detector 8 detects the interface movement distance, the drive motor 1 is driven slightly more than when suctioning to a predetermined position. Subsequently, the tube 5 is drawn in by the delivery roller 1o.

Furthermore, in order to cut the tube, the tube 5 is sent out by the feed roller 10, and the tube is cut by the cutter 12.

Furthermore, by changing the diameter of the tube 5 used, the amount of liquid handled varies.

〔Effect of the invention〕

As described above, the present invention has a simple structure using a tube and accurate liquid control, so it is possible to discharge a small amount of liquid, and it can be used while cutting, which has the effect of eliminating contamination. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a micro liquid dispensing device of the present invention, FIG. 2 is a perspective view of a conventional tip two dispensing device, and FIG. 3 is a cutaway view of a tube storage box according to the present invention. be. 1... Drive motor 2... Piston 3... Syringe 4... Connector 5... Tube
6...Liquid 7...Light source 8...Interface detector 10...Feeding roller 11...Guide 12...Cutter 13...Solenoid 14
...Medical solution 15...Chip or more Figure 1 Figure 3

Claims (4)

[Claims] (1) A syringe having a piston, a piston driver that drives the piston, a liquid contained in the syringe, a tube connected to the syringe, and an interface of the liquid in the tube at a first predetermined position. The first step to detect something is
a second detection means for detecting that the interface of the liquid in the tube is at a second predetermined position; a feeding means for feeding the tube; and a cutting means for cutting the tip of the tube. A micro-liquid dispensing device consisting of: (2) The micro-liquid dispensing device according to claim 1, wherein the liquid is colored. (3) The micro-liquid dispensing device according to claim 1, further comprising a box for storing the tube. (4) The micro-liquid dispensing device according to claim 1, wherein the same one-dimensional line sensor is used as the first detection means and the second detection means.