JPH0629790B2 - Electronic thermometer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a switch structure of an electronic thermometer.

[Prior art]

In recent years, due to the development of electronic technology, a small electronic thermometer using a thermistor or the like has been put on the market at a low cost, and the drawbacks of the mercury thermometer, such as fragile, harmful, and difficult to read, have been improved and spread. It is starting. However, the conventional electronic thermometer has the drawbacks of reliability and operability of the switch such that the switch is accidentally cut off during temperature measurement or the switch operation is difficult.

FIG. 1 shows an example of a switch structure of a conventional electronic thermometer. Reference numeral 1 denotes a circuit board on which electric elements such as ICs are mounted. 2 is a switch rubber, which is a conductive portion 2a by a push operation.
Conducts the switch pattern on the circuit board 1 to perform switching. 3 is a thermistor, 4 is a liquid crystal display, 5 is a battery, 6 is a panel frame, 7 is a case, 8 is a back cover, and 9 is a sensor cap. In the switch structure shown in Fig. 1, the position of the switch is almost the same as the position of the finger when holding the electronic thermometer. Therefore, it is erroneous when inserting or removing the armpit or sublingual for measurement. There was a drawback that it was impossible and the measured value was erased.

FIG. 2 shows another example of the switch structure of the conventional electronic thermometer. Reference numeral 22 is a slide switch, and 23 is a conductive spring, which is integrated with the slide switch 22, and slides along the guide groove of the panel frame 6 to conduct the pattern on the circuit board 1 to perform switching. Others are first
It is similar to the figure. In this example, erroneous operation during measurement is eliminated, but there is a drawback that the operation is difficult as compared with the push type method shown in FIG.

FIG. 3 shows another example of the switch structure of the conventional electronic thermometer. A lead switch 32 connects the switch patterns on the circuit board 1. This lead switch is attached so as to cut off conduction by bringing a magnet close to the lead switch. The lead switch is housed in a storage case 34 with the magnet 33 attached to cut the switch, and is removed from the storage case at the time of use. A switch is coming in. Reference numeral 35 is a storage case lid. Although this example has no problem in terms of malfunction, the switch operation for losing the storage case cannot be performed, and the storage case must be inserted each time when the measurement is performed twice or continuously by two or more people.
Further, there is always a drawback when the manufacturing cost becomes high.

〔Purpose〕

An object of the present invention is to eliminate the drawbacks of the switch structure of the conventional electronic clinical thermometer and to provide an electronic clinical thermometer excellent in operability and reliability.

[Means for Solving the Problems] An electronic thermometer according to the present invention includes a thermoelectric conversion element (63) and a rod-shaped case (5) having the thermoelectric conversion element arranged at one end.
3) and a detachable back cover (5
4), an electronic circuit (62) to which the lead wire from the thermoelectric conversion element is connected to calculate the body temperature, a display unit (64) for displaying the body temperature by a signal from the electronic circuit, and the electronic circuit. An electronic thermometer having a driving battery (66), comprising a push-type switch button (4) supported by the back lid.
1, 51) and a switch contact (68) for connecting a switch contact that abuts the push-type switch button and controls the electronic circuit.
a), a movement block (5) in which the electronic circuit, the liquid crystal display, the battery, and the switch contact piece are integrally formed.
2) and are provided.

〔Example〕

 Hereinafter, the present invention will be described in detail based on examples.

FIG. 4 is an external view of an embodiment of the electronic thermometer according to the present invention. Reference numeral 41 is a switch button, which is operated by a push operation in the axial direction. With this configuration, it is possible to operate the switch in a one-touch operation without accidentally pushing it when inserting / removing the armpit or under the tongue.

FIG. 5 is a sectional view of an embodiment of the electronic thermometer according to the present invention. 51 is a switch button, 52 is a movement block, 53 is a case, 54 is a back cover, and 55 is a sensor cap. The case 53 is manufactured by injection molding of synthetic resin, but the inside is molded by a slide core in the right direction in the figure because of the hollow shape of the pipe. Therefore, since the right end of the case becomes an opening, the switch cannot be mounted as it is. Therefore, by closing the right end opening of the case with the right end of the back cover 54 and arranging the switch button 51, the end switch can be realized without increasing the number of parts. At this time, the switch stroke is set slightly larger than the pop-out amount of the switch button from the back cover, and the back cover is provided with a surface to improve the erroneous input prevention performance without compromising the ease of pushing. it can.

FIG. 6 is a plan view of a movement block of an embodiment of the electronic thermometer according to the present invention, and FIG. 7 is a sectional view of the same. An IC 62 and other electric elements are mounted on the electronic circuit board 61, and a lead wire of a thermistor 63 is connected to the electronic circuit board 61. Reference numeral 64 is a liquid crystal display body, and the circuit board 6 is connected by the connector 65.
It is electrically coupled to 1. Reference numeral 66 denotes a battery, which is electrically coupled to the circuit board 61 via a battery plus terminal 67 and a battery minus terminal 68. Further, the battery negative terminal has a switch spring portion 68a, and constitutes a switch contact portion corresponding to the switch button 51 with the switch lead terminal 69 which is electrically coupled to the switch pattern on the circuit board. These parts are fixed to the panel frame 70 made of synthetic resin by a method such as heat caulking to form a movement block. Since the movement block of the electronic thermometer is constructed in the shape of an elongated rod as a whole, it has a layout of a thermoelectric conversion element at one end and a battery at the other end centering on the circuit board.

Regarding the switches, the rubber switch and the slide switch cannot be arranged on the end face because they are formed on the circuit board. However, in the embodiment of the present invention, the end switch can be realized only by adding one part of the switch lead terminal. Also, the switch button 51 is a back cover 54.
The switch button 51, which removes the back cover 54 when the battery is replaced, is separated from the battery negative terminal 68 and the switch lead terminal 69, which are movement blocks.

〔effect〕

The electronic clinical thermometer of the present invention has a push switch button supported on the back cover, and the switch block for contacting the push switch button to connect the switch contacts is formed on the movement block, so that the switch block can be replaced when the battery is replaced. It is not necessary to disconnect the connection between the electronic circuit and the electronic circuit, and the power supply terminal and the electronic circuit. Therefore, when assembling after replacing the battery, it is not necessary to match the terminal positions of the electronic circuit and the switch contact piece and between the electronic circuit and the power supply terminal, so that the battery can be easily replaced and the reliability in terms of electrical continuity is improved. It has the effect of providing an improved electronic thermometer.

[Brief description of drawings]

 1 to 3 ... Conventional switch structure FIG. 4 (a), (b), (c) ... External view of an embodiment of the present invention FIG. 5 ... Cross-sectional view of an embodiment of the present invention FIG. ... Movement block plan view of the embodiment of the present invention Fig. 7 ... Movement block cross-sectional view of the embodiment of the present invention 1,61 ... Circuit board 2 ... Switch rubber 2a ... Switch rubber conductive part 3, 63 ... Thermistor 4, 64 ... Liquid crystal display 5,66 ... Battery 6,70 ... Panel frame 7,53 ... Case 8,54 ... Back lid 9,55 ... Sensor cap 22 ... Slide switch 23 ... Conductive spring 32 ... … Lead switch 33 …… Magnet 34 …… Storage case 35 …… Storage case lid 41,51 …… Switch button 52 …… Movement block 62 …… IC 65 …… Connector 67 …… Battery positive terminal 68 …… Battery MY Scan terminal 68a ...... battery negative terminal Suitsuchibane section 69 ...... Suitsuchirido terminal

Claims (1)

[Claims] 1. A thermoelectric conversion element, a rod-shaped case having the thermoelectric conversion element arranged at one end, a detachable back cover provided at the other end of the rod-shaped case, and a lead wire from the thermoelectric conversion element. In an electronic thermometer having an electronic circuit connected to calculate the body temperature, a display unit for displaying the body temperature by a signal from the electronic circuit, and a battery for driving the electronic circuit, a push-type switch button supported on the back lid. A switch contact piece that contacts the push-type switch button and connects a switch contact that controls the electronic circuit; and a movement that integrally forms the electronic circuit, the liquid crystal display, the battery, and the switch contact piece. An electronic thermometer comprising a block and.