JPS6212856A - Biochemical measuring instrument - Google Patents

Abstract

PURPOSE:To simplify a measuring operation by providing a moving mechanism to a test piece insertion part so that a standard test piece or test piece in an unreaction state contained in a measuring instrument can be positioned to the test piece insertion part by such moving mechanism. CONSTITUTION:The moving mechanism 4 consists of a slender plate-shaped member 41 and a test piece holding part 42 is formed on the side of the member 41 facing an instrument body 1. The holding part 42 is so constructed that the standard test piece or the unreacted test piece 5 can be freely attachably and detachably mounted therein. Retaining pieces 42, 43 are projected and formed from both sides to prevent the dislodgment of the test piece 5. The exchange of the test piece 5 is easily executed by sliding the member 41 so as to project into the test piece insertion part 21 while a cover 3 is held open and exchanging the test piece by using a pincette or the like from above. The measuring operation is thus simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a calibration means for a biochemical measuring device such as a urine sugar needle.

(B) Conventional technology Conventional biochemical measuring devices use a test strip (a paper strip coated with a drug, generally fixed to the tip of a long thin plate called a stick) into the test strip insertion section of the measuring device. The light emitting part shines light on the test piece, the light receiving part detects the reflected light or transmitted light from the test piece, the detected amount of received light is processed by the CPU (microcomputer), and the measurement results are sent to the LED ( It is designed to be displayed externally using a light emitting device (light emitting device).

(c) Problems to be solved by the invention However, with this device, it is necessary to periodically calibrate, but in that case, a standard test piece stored or carried separately is inserted into the test piece insertion part. Calibration operations must be performed,
Furthermore, there was a risk of losing the standard test piece, which was inconvenient.

In addition, when actually measuring the chemical properties of a test liquid, first, before immersing the test piece in the test liquid, first set it in the test piece insertion part of the measuring device and check the value in an unreacted state, that is, a blank. The value had to be measured, and the measurement operation was troublesome.

(d) Means and action for solving the problem This biochemical measuring device is equipped with a moving mechanism in the test piece insertion section, and this moving mechanism allows the standard test piece built into the measuring device or the unreacted state to be tested. The test piece can be placed in the test piece insertion section, and calibration operations or blank value measurement operations can be performed.

(E) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

l is the biochemical measuring device main body (hereinafter abbreviated as the device main body)
2 is a test piece holder attached to or integrally provided with the main body l of the apparatus.

In the test piece holder 2, at the in-plane center of the flat substrate,
The upper part is recessed with a test piece insertion part 21 that is open so that the stick 7 can be inserted, and the test piece mounting plate 22 of this test piece insertion part 21 has a light emitting part and a light receiving part (not shown) in the main body l of the apparatus. ) is provided with a window hole 23 facing the area. At the upper part of the test piece insertion part 21, a stick holding piece 24, 24 is provided which projects from the side. In addition, the test piece insertion part 21
A storage section 25 for storing a moving mechanism 4, which will be described later, is provided on the side thereof, and the test strip insertion section 21 and this storage section 25 communicate with each other.

The moving mechanism 4 is composed of an elongated plate-like member 41, and a test piece holding portion 4 is provided on the side of the plate-like member 41 facing the apparatus main body l.
2 is formed. A standard test piece or an unreacted test piece 5 can be removably attached to this holding part 42, and in order to prevent these test pieces 5 from falling off, holding pieces 43 and 43 are attached from the side of the surface. It is formed protrudingly. Furthermore, a guide pin 44 is provided protruding from the same surface of the plate member 41 as the holding portion 42 . This guide pin 44 is inserted through the rear guide groove 26 provided in the storage section 25 and protrudes rearward (toward the apparatus main body 1 side), and its tip is connected to the fixing pin 26 provided on the rear surface of the specimen holder 2. and are connected by a spring 6.

On the other hand, a tab 45 is provided at the rear end of the front surface of the plate member 41 , and is inserted through the front guide groove 27 provided in the storage section 25 and projects to the front surface of the test piece holder 2 .

A pressing piece 46 is provided protrudingly at the lower end of the plate member 41.
When the plate member 41 is moved, the pressing piece 46 passes through the insertion hole 29 formed on the side of the test piece insertion part 21 and connects the measuring circuit (not shown) provided in the main body 1 of the apparatus. It is configured to press a switch 11 to open and close.

The test piece holder 2 is integrally provided with a flat cover 3. The cover 3 has its base end supported by the test piece holder 2 below the test piece insertion part 21, and has a spring shaft 31.
The tip of the holder 2 has a bent portion 32 that is aligned with the upper surface of the holder 2, and a cut portion 34 through which the stick 7 is inserted is provided in the center of the bent portion 32. A locking pawl 33.33 is provided which engages with an engaging pawl 12.12 provided on the test piece holder 2).

A pressing piece 35 made of a soft elastic material such as rubber is provided on the inner surface of the cover 3 for pressing the standard test piece 5 and the stick 7 against the mounting plate 22.

Next, a method for calibrating this measuring device and a method for measuring a blank value will be explained below.

To calibrate this measuring device, open the cover 3 and slide the knob 44 toward the test piece insertion section 21 with your finger. In this way, the plate member 41 protrudes into the test piece insertion portion 21, and the standard test piece 5 attached to the plate member 41 faces the window hole 23. At the same time, the pressing piece 46 passes through the insertion hole 29 and presses the switch 11.
Activate the measurement circuit. Furthermore, when cover 3 is closed,
The presser piece 35 presses the standard test piece 5 against the presser plate portion 22 and brings it into close contact. In this state, a variable resistor (not shown) provided in the measuring device main body 1 is adjusted to obtain a correct display state.

When the calibration is completed and you release your finger from the knob 45, the plate member 4
1 is stored in the storage portion 25 by the contraction force of the spring 6, and at the same time the pressing piece 46 is separated from the switch 11, and the measuring circuit is turned off.

Note that if the moving mechanism 4 is provided with a locking mechanism so that the plate-like member 41 can be locked in a state in which it protrudes into the test piece insertion section 21, the knob 45 can be pressed with a finger during the calibration operation ( It's unnecessary and convenient.

When measuring a blank value, an unreacted test piece (which can be easily made by cutting off the tip of a stick) is attached to the holding part 42 of the plate member 41 in advance, and the above-mentioned calibration is performed. As in the case of , insert the test piece into the test piece insertion section 2
When set to 1, the measurement circuit is activated and the blank value can be easily determined.

To replace standard test piece 5 or an unreacted test piece,
With the cover 3 open, insert the plate member 41 into the test piece insertion section 2.
This can be easily done using tweezers or the like from above.

In this embodiment, one test piece is attached to the plate-like member 41, but for example, a plurality of holding parts are provided along the sliding direction of the plate-like member 41, and a standard If a test piece or an unreacted test piece is attached, there is no need to replace the test piece as described above, which is convenient.

Further, the moving mechanism 4 is not limited to that of this embodiment, and can be configured to rotate instead of sliding, and the design can be changed as appropriate.

Furthermore, as for the measuring device, although a reflective type is shown above, it can also be applied to a transmission type.

(f) Effects of the Invention The biochemical measuring device of the present invention includes a moving mechanism in the test piece insertion portion, and the moving mechanism positions at least one test piece built in the biochemical measuring device in the test piece inserting portion. Therefore, when performing a calibration operation, the standard test piece can be easily set, which is convenient, and there is no need to separately store or carry the standard test piece.

In addition, when measuring, a blank value can be measured using the built-in unreacted test piece, so it is possible to directly immerse the stick in the test liquid without measuring a blank value. This simplifies the measurement operation.

Furthermore, if the moving mechanism is made of a sliding plate-like member as in this embodiment, the moving mechanism itself can be made smaller, making it suitable for a small portable measuring device.

[Brief explanation of drawings]

Each of the drawings shows an embodiment of the present invention, and FIG. 1 is a perspective view of the main part of the biochemical measuring device of this embodiment, showing a state in which the built-in test strip is located in the test strip insertion section, and FIG. 3 is a sectional view of the main part along the line ■-■ in FIG. 1, and FIG. 4 is a perspective view of the moving mechanism. . 1: Biochemical measuring device main body, 2: Test piece holder, 3: Cover, 4: Moving mechanism, 5: Standard test piece,
21: Test piece insertion part, 41: Plate member.

Claims (2)

[Claims] (1) A test piece insertion part, a light emitting part and a light receiving part facing the inserted test piece, and receiving a signal from the light receiving part according to the amount of light received from the test piece that has been immersed in the test liquid and reacted. A biochemical measuring device including a quantitative means for quantifying the concentration of a specific chemical substance in a test liquid based on the amount of light received, wherein a moving mechanism is provided in the test piece insertion section, and the moving mechanism allows the A biochemical measuring device characterized in that at least one test piece is located within a test piece insertion section. (2) The biochemical measuring device according to claim 1, wherein the moving mechanism is a sliding plate-like member, and at least one standard test piece is attached to the plate-like member.