JPS59228138A - Electronic clinical thermometer - Google Patents

Abstract

PURPOSE:To keep the servicable state for long years, by enclosing a lithium battery, whose life is long when it is not used, in a screwed battery case and the like. CONSTITUTION:A temperature sensitive part 1 comprises a thermistor and an aluminum cap, which protects the thermistor, and forms a unitary body together with the tip of a main-body case 4. A circuit part 2 comprises a special IC, a circuit board 2b, and externally attached parts. A power source part is constituted by a space formed by the main-body case 4 and a battery cap 7, battery terminals 8a and 8b, a battery 9, and a tightening screw 10. As the battery 9, a lithium battery, whose life is long when it is not used, is used. The value of the detected temperature is displayed on a liquid crystal display 3.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a small electronic thermometer.

[Background of the invention]

Recently, compact electronic thermometers that integrally house a temperature sensing section, a circuit section, a display section, a power supply section, and a switch section have been put into practical use. In general, thermometers are not used every day, but are usually kept in a first-aid kit, drawer, etc. at home, and are taken out and used when a person develops a fever or becomes ill. In other words, the time it takes to store something when not in use is longer than the time it takes to use it. Therefore, for electronic thermometers that use batteries as a power source, while the electronic thermometer is stored, the batteries will self-discharge and consume all of their power, so when it is time to fully measure body temperature, The fact that the battery runs out every now and then is not a good thing for a thermometer to be used when sick.

Conventional electronic thermometers use manganese batteries or silver oxide batteries as power batteries. however,
Manganese batteries have a small power capacity per volume, which shortens the life of the battery and does not allow for the miniaturization of devices required in the current electronic thermometer market. Furthermore, although silver oxide batteries are small, their battery life is short. If a battery in an electronic thermometer is left unused after its life has expired, fluid may leak from the battery and damage the circuit.

Furthermore, conventional electronic thermometers have a structure that allows the batteries to be easily replaced. That is, the battery cover is engaged by the elasticity of the plastic claw, and the battery cover can be easily removed with bare hands without using any tools, and the battery inside can be taken out. Therefore, there have been many accidents in which children accidentally swallow the batteries.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic thermometer that solves the above problems, has a long battery life, and can prevent children from swallowing the battery.

[Summary of the Invention] In short, the electronic thermometer of the present invention uses a lithium battery as a power supply battery, which has the longest lifespan during inconvenience among existing batteries. In addition, by storing the battery in a battery case with all screws tightened, make sure that the case can be opened and closed using a designated tool to prevent the battery from being easily removed. It is.

[Embodiments of the invention]

Hereinafter, an embodiment of the electronic thermometer of the present invention will be explained based on FIGS. 1 to 4. Fig. 1 is an overall external view of an electronic thermometer according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the electronic thermometer shown in Fig. 1 with a part of the main body case and the battery cover completely destroyed, and Fig. 3 is a cross-sectional view of the electronic thermometer shown in Fig. FIG. 4 is a cross-sectional view of the entire infant thermometer of FIG. 1, taken along the line AA'. In the figure, numeral 4 is a cylindrical main body case, and 1 is a temperature sensing part, which is made up of a thermistor and an aluminum cap to protect it, and is integrated at the tip of the main body case 4. 2 is the circuit section, dedicated IC
2a, a circuit board 2b, and external circuit components 2C. 3 is a liquid crystal display for digitally displaying the measured temperature value, and is electrically connected to the circuit board 2bK. Further, 5 is a switch, and 6 is a power supply section that houses a battery. The front end of the main body case 4 is open to accommodate the thermistor of the temperature sensing part, and the front side is provided with an opening for the display 3 and an opening for the switch 5, and the rear end is open. An opening for the power supply section 6 is provided. In addition, on the back of the main body case 4, the
An opening for assembling the electronic thermometer is provided, and the opening is covered by i4b.

The switch 5 is a contact switch made of conductive rubber and non-conductive rubber, and protrudes from the opening of the main body 4. When the switch 5 is pushed in, the circuit on the circuit board 2b is short-circuited, and a temperature measurement start signal is given to the dedicated IC 2a. It will be done. The power supply section 6 is comprised of a space formed by the main body case 4 and the battery cover 7, battery terminals 8a and 8b, a battery 9, and a tightening screw 10. Battery terminal 8a.

8b is soldered to the circuit board 2b, and the voltage of the battery 9 is constantly applied to the dedicated IC 2a. In this embodiment, the battery 9 is a coin-type lithium battery (manganese dioxide lithium secondary battery) with a diameter of about 20 mm. The tightening screws 10 are for fixing the entire battery cover 7 to the main body case 4, and are fully fastened between the 9 holes provided in the main body case 4 and the boss provided in the Sochi Rin 7. . In addition, the tightening screw 1
0 is for tightening and loosening with a watch screwdriver.

Next, we will discuss the effects when using the electronic thermometer of this embodiment.

Explain the results.

Electronic thermometers with the above configuration must be manufactured at their manufacturing factory.
After connecting and adjusting the temperature sensor 11, display 3, etc. to the circuit section 2, insert the lithium battery 9 into the main body gas 4, that is, into the power supply section 6, and fix it with the 7ha lid 7 screws 10. , will be shipped after final inspection.

Electronic thermometers shipped from the factory are stored in warehouses, pharmacies, stores, etc. for a long period of time until they reach the users. -Even if the battery stays for 1 to 2 years, since the battery used is a lithium battery, power consumption due to self-discharge is extremely constant, and leakage is therefore less likely to occur. In addition, after the user purchases the electronic thermometer, if the user stores it without using it for a long period of time, for example, after 2 to 3 years, when the user takes it out to take the temperature when necessary,
Unlike conventional silver oxide batteries, which become almost unusable due to deterioration in their discharge capacity, they still have electricity in the light, so they can be used.

In addition, since the battery cover 7 is fixed with the tightening screw 10 and the battery 9 cannot be removed without using a watchdriver, accidents such as a child accidentally removing the battery 9 and accidentally swallowing it are completely prevented. be able to.

Furthermore, even if an older person who can use tools such as a watch screwdriver replaces the battery and forgets to dispose of it after taking it out, the outer diameter of the lithium battery 9 in Example 2 is 20 mm.
Because the body is thick, it cannot pass through the infant's throat, which prevents the battery from being swallowed into the membrane.

〔Effect of the invention〕

As explained above, according to the electronic thermometer of the present invention, since the power supply battery is a lithium battery, even if the thermometer is stored for many years and used irregularly, the electric thermometer will be able to use the power due to self-discharge. Since it consumes less energy, it can be used, and in an emergency, it is possible to reduce the need to replace the battery in a hurry when the battery becomes insufficient in power. Since it uses a lithium battery that does not self-discharge, it is possible to reduce the frequency of battery replacement in general households. Furthermore, since the battery is opened and closed using a tool such as a screw, it is not easy to remove the battery, which prevents children from swallowing the battery. Since the frequency of battery replacement is reduced during pregnancy, even if the battery container is constructed to be opened and closed using a tool, the ease of handling does not result in much cost.

As described above, the effects of the present invention are remarkable.

[Brief explanation of the drawing]

M! Fig. 1 is an overall external view of an electronic thermometer according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the electronic thermometer shown in Fig. 1 with a part of the main body case and the battery clip removed, and Fig. 3 is a cross-sectional view of the electronic thermometer shown in Fig. 1. 4 is a cross-sectional view of the electronic thermometer shown in FIG. 1. Engineering...Temperature sensing part, 2...Circuit part, 3...Display part, 4
...Body case, Death...Switch, 6...Sarabe,
7...Battery cover, $1 Fixed 2nd country and 3rd day

Claims (1)

[Scope of Claims] 1. A temperature-sensing section that senses all body temperature, and a circuit section that converts analog values corresponding to the body temperature obtained by the temperature-sensing section into all digital values;
In an electronic thermometer that integrates a display part that displays the digital value, a power supply part that is a battery that supplies direct current pressure to the circuit part, and a switch part that gives a temperature measurement signal, the battery An electronic thermometer which uses a lithium battery (IL) as a battery. An electronic thermometer characterized by having a structure that opens and closes. 3. In claim 1 = j or 2, the battery is a coil-type lithium battery with an outer diameter of approximately 20 cm. An electronic thermometer that imitates this.