JP5300613B2 - Electronic thermometer - Google Patents

Description

  The present invention relates to an electronic thermometer. In particular, it relates to an electronic thermometer that measures the temperature of the armpit.

  In the conventional electronic thermometer, in Japan, the shape of the mercury thermometer is mainly followed, the body temperature measurement part is under the armpit (armpit), and the guard / caregiver is the probe part of the rod-shaped electronic thermometer (metal cap part) Is measured under the armpit (armpit) of the person being measured, or the person himself / herself measures the body temperature by sandwiching the probe part (metal cap part) of the rod-shaped electronic thermometer under the armpit (armpit) (patent) Document 1: Japanese Patent Publication No. 3-24615).

Japanese Patent Publication No. 3-24615

  However, in such an electronic thermometer, especially in the case of an elderly person or a thin body shape, if the temperature measurement part (metal cap part) is not properly attached to the measurement site and no error notification is given, the body temperature is measured lower. There is a possibility.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic thermometer that is easy to carry, saves power, and can be easily and reliably attached to the armpit.

In order to achieve the above object, the electronic thermometer of the present invention has a measurement site under the armpit, and is rotatably provided on a main body part constituting the casing by a gripping part, a temperature measuring part, a temperature display part, and a hinge. comprises a cap, an electronic clinical thermometer of the total weight 20 to 30 g, by rotating the hinge and opening the cap with a magnet, the temperature measuring unit is body temperature measurement from said housing Therefore, the power supply from the power battery is turned on when the magnet reed switch that is exposed and attached in the cap changes from the immobile state to the on state .

  According to the present invention, it is easy to carry, saves power, and can be easily and reliably attached to the armpit.

It is a figure which shows preferable embodiment of the electronic thermometer of this invention. It is a block diagram of the electronic thermometer shown in FIG.

  Hereinafter, an embodiment of the present invention will be described in detail by way of an example of an actual measurement type electronic thermometer with reference to the drawings. However, the constituent elements described in this embodiment are merely examples, and the scope of the present invention is not intended to be limited to these, and it goes without saying that the present invention can be applied to an electronic thermometer of an equilibrium temperature prediction type.

(Example) <Configuration of electronic thermometer>
1A and 1B show an electronic thermometer of the present embodiment, in which FIG. 1A is a front view, FIG. 1B is a front view showing a state at the time of measurement, FIG. These are functional block diagrams. In FIG. 1, an electronic thermometer 1 has a total weight of about 20 to 30 g, a temperature sensor (not shown) formed of a thermistor is housed, and a temperature measuring unit 7 that protects the temperature sensor in a liquid-tight manner with a metal cap, A cap 3 that protects the temperature measuring unit 7 and is pivotally attached to a main body 2 that constitutes a housing by a hinge 8, a display unit 4 that is formed of a liquid crystal or the like for displaying a measured body temperature value, a power source A magnet 5a is provided inside the cap 3 to make the reed switch (magnet reed switch) 5 as an ON / OFF switch immovable. In order to improve impact resistance, the reed switch (magnet reed switch) 5 is molded in resin.

FIG. 2 is a functional block diagram showing the configuration of the electronic thermometer 1 of the present embodiment. The electronic thermometer 1 includes a temperature measuring unit 7, an arithmetic control unit 12 that controls the electronic thermometer 1 while calculating an actual temperature or a predicted temperature from a digital quantity measured by the temperature measuring unit 7, a liquid crystal that displays a measurement result, and the like. And a display unit 4.
The calculation control unit (CPU) 12 is based on an EEPROM 12c storing parameters necessary for body temperature measurement, a RAM 12a for storing measured temperatures in time series, a ROM 12b storing a program for predicting and calculating the body temperature of the subject, and the like. The entire electronic thermometer 1 is controlled.

  The measurement temperature unit 7 includes a thermistor, a capacitor, a temperature measurement CR oscillation circuit, and the like, and outputs the temperature detected by the thermistor as a transmission signal. The output signal that has been output is counted by a counter and is output as a digital quantity. At least the thermistor constitutes the temperature measuring unit 7 which is liquid-tightly protected with a stainless steel metal cap.

  The arithmetic control unit 12 includes a timer (not shown) that measures the ON time of the digital signal output from the temperature measuring unit 7.

<Flow of temperature measurement process in electronic thermometer>
Next, the flow of the body temperature measurement process in the electronic thermometer will be described. In addition, although the flow of the body temperature measurement process of the electronic thermometer 1 of an equilibrium temperature prediction type | formula is demonstrated here, this invention is not limited to this, The electronic thermometer of a measurement type | formula and the electronic thermometer of the type which uses prediction / measurement together are demonstrated. Is also applicable.

  When mounted on the subject's armpit, the electronic thermometer 1 starts temperature measurement at a predetermined cycle of sampling timing, and predicts the body temperature of the subject based on the temporal change of the acquired temperature data. To do. Arithmetic processing is executed in an arithmetic processing unit (not shown).

  In order to measure the body temperature, the reed switch (magnet reed switch) 5 as a power ON / OFF switch does not move by opening the cap 3 constituting the housing of the electronic thermometer 1 to the state shown in FIG. From the state, the electronic thermometer 1 is initialized, and temperature measurement by the thermistor is started. For example, the calculation processing unit calculates temperature data at a predetermined interval, for example, every 0.5 seconds.

Next, it is determined whether a body temperature measurement start condition is satisfied. Specifically, the degree of increase from the value of the temperature data calculated by the previous temperature measurement (that is, the value of the temperature data 0.5 seconds before) has become a predetermined value (for example, 1 ° C.) or more. Judge whether or not. Next, when it is determined that the degree of increase is equal to or greater than a predetermined value, it is determined that the body temperature measurement start condition is satisfied, and the timing at which the temperature data is measured is used as a reference point for predictive body temperature calculation (t = 0). Set as. That is, in the electronic thermometer 1, when a rapid temperature rise is measured, it is considered that the subject wears the electronic thermometer 1 under the armpit.

Next, when it is determined that the body temperature measurement start condition is satisfied, temperature data acquisition is started. Specifically, the output temperature data and the timing at which the temperature data is measured are stored in the RAM 12a as time series data. Next, using the stored temperature data, a predicted body temperature is calculated according to a predetermined prediction formula.

Next, after a lapse of a predetermined time (for example, 25 seconds) from the reference point (t = 0), the predicted value in the calculated fixed section (for example, t = 25 to 30 seconds) is set as a predetermined prediction establishment condition. It is determined whether or not the above is satisfied. Specifically, it is determined whether or not the temperature is within a predetermined range (for example, 0.1 ° C.).

Next, when it is determined that the prediction establishment condition is satisfied, the temperature measurement is ended, and a sound indicating that the calculation of the predicted body temperature is completed is output from a speaker (not shown), and the calculated prediction is displayed on the display unit 4. Display body temperature. By changing the cap 3 from the state of FIG. 1B to the state of FIG. 1A, the reed switch 5 is turned off by the magnet 5a, and the power supply from the battery (power supply unit) 13 is stopped.

  On the other hand, when it is determined that the prediction establishment condition is not satisfied, it is determined whether a predetermined time (for example, 45 seconds) has elapsed from the reference point (t = 0), and when it is determined that it has elapsed, The temperature measurement is forcibly terminated. When the forced termination is performed, the predicted body temperature calculated at that time is displayed on the display unit 4. By changing the cap 3 from the state of FIG. 1B to the state of FIG. 1A, the reed switch 5 is turned off by the magnet 5a, and the power supply from the battery (power supply unit) 13 is stopped.

The main body 2 constituting the housing and the cap 3 constituting the housing are formed of a material having impact resistance such as styrene resin (high impact polystyrene, ABS resin), polyolefin resin (polypropylene, polyethylene), or the like. Has been. Moreover, in order to give an antibacterial property, you may shape | mold so that a silver phosphate silver compound may be contained about 1 to 2.5 weight%.

1 Electronic thermometer, 2 body part, 3 cap, 4 display part, 7 temperature measuring part

Claims (1)

An electronic thermometer with a measuring part under the arm, a cap that is pivotably provided on the main body constituting the housing by a gripping part, a temperature measuring part, a temperature display part, and a hinge, and has an overall weight of 20-30 g. There,
By rotating the hinge and opening the cap with a magnet, the temperature measuring unit is exposed for temperature measurement from the housing, a magnet reed switch mounted within said cap immobility An electronic thermometer characterized in that the power supply from the power battery is turned on when the power is turned on.

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