JPH0435698B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an improvement in a compact electronic thermometer.

[Conventional technology]

Even if a small electronic thermometer is equipped with a digital display that shows the elapsed measurement time, the patient cannot
It is difficult to read the passage of time with a thermometer tucked under the armpit.

As a countermeasure, for example, as shown in Japanese Unexamined Patent Publication No. 54-86386, a predetermined elapsed time, such as 3 minutes after the temperature measurement starts and the temperature exceeds 35°C, is used to estimate the time when the displayed temperature stops rising. It is customary to ring a buzzer at that time.

Here, the buzzer is required to be loud enough to be heard through the subject's clothing.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional device, a temperature-sensing portion that is placed under the armpit is provided at the tip of the elongated main body case, and the buzzer sound is emitted from the opposite end surface.

For this reason, when taking temperature measurements, when the temperature-sensing tip is placed under the armpit, the buzzer sound-emitting end surface is inevitably blocked by clothing, which tends to produce a small sound that is muffled inside the main body case. It is in.

Of course, this can be done by setting the buzzer volume higher in anticipation of the amount of attenuation, but the power consumption of the buzzer increases, and it cannot be handled with a small battery that can be stored inside the main body case. The voltage becomes unstable and the circuit tends to malfunction.

[Means for solving problems]

The present invention has been made in view of the above-mentioned circumstances, and it is possible to drive a buzzer to generate sound without causing malfunction of various parts such as a temperature measuring circuit even with a power source that can be housed in this kind of elongated main body case. The pronunciation was made so that it could be heard even through clothing.

Furthermore, the buzzer sound can be clearly heard when the device is taken out after temperature measurement and picked up by hand to read the display, or even when it is placed on a desk.

For this purpose, the present invention includes a temperature sensing section, a temperature display section,
An electronic thermometer in which a sounding means that operates according to the state of temperature measurement is provided in a flat and elongated main body case, wherein the temperature display section is arranged on a wide main surface of the main body case, the sounding means is a piezoelectric buzzer, and the sounding means is a piezoelectric buzzer. The piezoelectric buzzer is housed in the main body case so that the sound emitting surface faces the wide main surface.

[Effect]

When measuring temperature by placing the temperature-sensing part at the tip of the flat, elongated body case between your armpits, the other end of the body case supports your clothes like a tent, so there is sufficient space near your armpits. Ru. At this time, the sound emitting surface of the piezoelectric buzzer as a sounding means is arranged so as to face the wide main surface of the main body case, and since this direction faces the above-mentioned free space, the buzzer sound is not trapped in the main body case. It is emitted and can be heard even through clothing.

In particular, when it comes to checking the progress of temperature measurement, it is possible to tell the difference between the number of times the buzzer sounds and the number of times it sounds.

Next, when the subject takes the test object out and reads the display, the display surface and the buzzer's sound emitting surface face each other, so the buzzer sound feels like it is coming from the display section, making it easy to hear. . This also applies when the main body case is placed on a desk.

In addition, since the buzzer sound emitting surface faces the flat and elongated wide main surface, it is easy to store in line with the flat piezoelectric buzzer and does not require unnecessary space. Since it propagates easily, the emission efficiency is not significantly inhibited.

This allows for an easy-to-hear buzzer configuration, which eliminates the need for extra power consumption.
There is little fluctuation in radio wave voltage, and circuit stability can be ensured.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, numeral 1 is a temperature sensing element, which is a thermistor protected by an aluminum cap. The temperature sensing element 1 is provided at the tip of a hollow plastic shaft, and the other end of the hollow shaft is connected to the main body case 4. Reference numeral 3 denotes a 3+1/2 digit liquid crystal display as a temperature display section for displaying temperature measurement results, and is located on the wide main surface 4a of the flat and elongated main body case 4. The main body case 4 is molded from ABS resin, and contains circuit components such as a temperature measurement circuit and a micro battery for power supply.

Figure 2 is a block diagram of the circuit, and 5 is A-D for determining body temperature by changes in electrical resistance of the temperature sensing element.
It is a converter. 6 is the power supply, switch 2
By turning ON, the A-D converter 5 is energized for a predetermined period of time, for example, every 0.2 seconds, and the temperature is measured periodically, and power is supplied to the subsequent data holding circuit and the like. Reference numeral 7 denotes a maximum value holding circuit which, after being cleared by a reset signal immediately after the power switch 4 is turned on, holds the maximum value of the output of the A-D converter 5 obtained from the periodic energization of the power supply device 6. 8 is a decoder driver for displaying the temperature measurement result on the display 3. A timer 9 starts when the power switch 2 is turned on, and is composed of a clock signal generation circuit and a counter circuit, and generates an output every minute. 10 is a piezoelectric buzzer as a sounding means,
It is connected to the buzzer control circuit 11. This piezoelectric buzzer 10 is housed in the main body case 4 so that its sound emitting surface 10a faces the wide main surface 4a of the main body case 4. The buzzer control circuit 11 consists of an oscillation circuit for the piezoelectric buzzer 10 and a controller for the number of times the piezoelectric buzzer 10 sounds. When the first one-minute signal generated by timer 9 is generated, the buzzer control circuit
Outputs a single sound of 0.5 seconds, and when receiving the second 1 minute elapsed signal, that is, 2 minutes elapsed signal, the output is 0.5 seconds.
It outputs intermittent sounds of ON, 0.5 seconds OFF, and 0.5 seconds ON, and in the same way as above, it outputs 3 intermittent sounds after 3 minutes and 4 times after 4 minutes, so you can know the number of minutes that have passed without making any mistakes. can.

According to the electronic thermometer of this embodiment, when it is not possible to determine from the liquid crystal display when temperature measurement has finished,
Since the elapsed time can be determined by the number of times the buzzer sounds, there is no need to look at the clock, and this has the effect of making it easier to measure the temperature according to the characteristics of the individual.

The buzzer sound generated every minute serves to make the subject concentrate on estimating the length of one minute during the temperature measurement, and maintains his/her attention until he/she hears the final buzzer sound. Therefore, temperature measurement will be performed reliably.

〔effect〕

As described above, according to the present invention, in an electronic thermometer in which a temperature sensing section, a temperature display section, and a sounding means that operates according to the temperature measurement state are provided in a flat and elongated main body case, the temperature display section is placed inside the main body case. The sound generating means is a piezoelectric buzzer, and the piezoelectric buzzer is housed in the main body case so that its sound emitting surface faces the wide main surface, so no extra power is consumed. This allows for stable temperature measurement without fluctuations in battery voltage, even with small batteries such as micro batteries.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the external appearance of the electronic thermometer of the present invention;
FIG. 2 is a circuit block diagram of the same embodiment. 1... Temperature sensing element, 3... Liquid crystal display, 4... Main body case, 4a... Wide main surface, 10... Piezoelectric buzzer.

Claims (1)

[Claims] 1. An electronic thermometer in which a temperature sensing part, a temperature display part, and a sounding means that operates according to the temperature measurement state are provided in a flat and elongated main body case, in which the temperature display part is arranged in a wide main body case. An electronic thermometer, wherein the sounding means is a piezoelectric buzzer, and the piezoelectric buzzer is housed in a main body case so that the sound emitting surface faces the wide main surface.