JPH0348457B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Prior Art] Recently, in the thermometer market, electronic thermometers that digitally display temperature measurement results have been seen here and there among mercury thermometers.

Such an electronic thermometer is provided with a temperature measurement operation switch so as to supply power to the temperature measurement circuit section only when measuring the temperature.

[Problem that the invention seeks to solve]

By the way, when taking a temperature measurement by inserting a thermometer under the armpit, the thermometer may be inserted or removed by picking it up with the fingertips, or may be pressed or rubbed by clothing during the temperature measurement, which creates an environment where the temperature measurement operation switch is prone to malfunction. be.

Conventionally, this type of switch has been a slide type switch as shown in Japanese Utility Model Application Publication No. 16943/1983. This sliding switch had a fairly strong sense of moderation so that it would not malfunction even if it was rubbed by clothing, but it was also difficult to operate. For this reason, it is conceivable to use a push-button switch so that anyone, especially children who are inexperienced, can use it freely. If you take this into account, you will need some kind of hook shape for your fingertips.

[Means for solving problems]

The present invention was made in view of the above circumstances, and
A flat main body case, a temperature sensing part installed at the front end,
In an electronic thermometer that is equipped with a temperature measurement circuit section including a circuit board, a display device for body temperature measurement values, a power supply section, and a temperature measurement operation switch, a first opening and display that exposes the temperature measurement operation switch on the wide side of the main body case. a second opening for exposing the container;
The circumferential surfaces of both openings are sloped in a concave shape, and the operating surface of the temperature measurement operation switch is approximately at the same height as the wide surface of the main case, and the display surface of the display is located at the bottom of the recess. .

[Effect]

Therefore, by providing both the temperature measurement operation switch and the display on the wide side of the flat main body case, the operation surface and display surface of the temperature measurement operation switch can be made relatively wide, making it easier to operate and see. I can do it.

In addition, making the operation surface wider makes it more likely to malfunction when you pick up the main case with your fingertips and insert or remove it from your armpit. At the same time, by sloping the circumferential surface of the first opening in a concave shape, the temperature measurement operation switch can be operated unnecessarily by external pressure from clothes, etc., even though the main case has a flat shape that is easy to pick up. without having to do it,
Furthermore, when operating the thermometer, the temperature measuring operation switch is positioned from the bottom of the concave inclined surface, so the operating finger is guided by the inclined surface and can be operated efficiently.

In particular, the first opening for the temperature measurement operation switch and the second opening for the display are arranged adjacent to each other, and one side (the temperature measurement operation switch) exposed from both is approximately at the same height as the wide surface. However, since the other (indicator) is located at the bottom of the concave slope, you can tell which side you are touching by just touching it lightly, and you can tell which side you are touching without looking. It is guided naturally to the opening and can be picked firmly.
This makes it possible to grope and pull out the thermometer from under clothing.

Furthermore, since the display surface of the display device in the second opening is located at the bottom of the concave inclined surface, it is less likely to be scratched or dirtied, thereby preventing it from becoming difficult to read.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 is an external front view of an electronic thermometer according to an embodiment of the present invention, FIG. 2 is a front sectional view of the electronic thermometer shown in FIG. 1, and FIG. 3 is a plan sectional view of the electronic thermometer shown in FIG.

In Fig. 1, 2 is a long main body case made of plastic and has a flat cylindrical shape consisting of a wide upper and lower surface and both narrow side surfaces, and 1 is provided at the front end of the main body case 2 to protect the thermistor and this. A temperature-sensing section consisting of an aluminum cap, 6 a display that displays the measured body temperature value using a liquid crystal, and 9 a temperature measurement operation switch that is operated at the start of temperature measurement. In addition, main body case 2
The outer diameter of the tip to which the temperature sensing part 1 is attached is approximately 4 to 5 mm.
It forms a hollow shaft shape. In addition, the flat main body case 2
A first opening 2 is provided on the surface of the device to expose the display device 6 and the temperature measurement operation switch 9 on the wide upper surface side.
2, and a second opening 21 are formed adjacent to each other so that the shape of the display 6 and the temperature measurement operation switch 9 can be enlarged. It has an opening 23 for circuit adjustment provided inside the main body case 2, and an opening 24 for a battery case at the rear end (9c will be described later).

In Figures 2 and 3, 3 is a circuit board made of an elastic glass cloth-based epoxy resin board with a thickness of 0.6 mm, and 8a to 8f are external circuit components soldered to the back side of the circuit board 3. , 8f is a trimmer for adjusting the circuit, and 5 is a temperature measuring IC that intermittently samples the temperature of the temperature sensing section 1 and displays it on the display 6 (FIG. 3). This IC 5 is a chip that is wire-bonded directly to the circuit board 3 and sealed, and its interior is manufactured using a low power consumption C-MOS process. In addition, the driving voltage of IC5 is
1.5V, the switch signal generated by operating the power switch 9 enters the temperature measurement mode, and after maintaining the temperature measurement mode according to predetermined conditions, the display 6 is turned off and the measurement standby state occurs. Since these are not directly related to the present invention, they will be omitted.
The temperature measurement circuit section 19 is constituted by the above-mentioned components, that is, the circuit board 3, the external circuit components 8a to 8f, and the IC 5.

A rib 4 is provided on the front inner wall of the main body case 2 and forms a groove for holding the circuit board 3. Note that the ribs 4 are not held over the entire length of the circuit board 3, but are provided up to point A as shown in the figure, and hold approximately half of the front of the circuit board 3. In addition, the main body case 2 to which the circuit board 3 is attached
The inner diameter dimension W is not constant over the entire length of the circuit board 3, and increases from the front toward the rear end. This is because when the main body case 2 is molded using a plastic stick, a slope is created for cutting out the mold. Therefore, when the attached circuit board 3 is inserted from the rear open side of the main body case 2, it is held by the groove formed between the ribs 4 formed on the inner wall of the main body case 2, and Movement in the direction perpendicular to that surface is restricted, but since the inner diameter W of the main body case 2 is larger than the width of the circuit board 3, if force is applied, the movement in the direction perpendicular to that surface will move within the elastic limit of the circuit board 3. It can be displaced vertically.

The temperature measuring operation switch 9 of the present invention is a push button switch, and in this embodiment, as shown in the figure, it is made of insulating rubber 9a and conductive rubber 9b, and is fixed to the circuit board 3. This is not limited to the one in this embodiment, and may be any push button switch that sends out a signal when pressed. Note that when this circuit board 3 is housed in the main body case 2, a first opening 22 is provided on the wide side of the main body case 2 corresponding to the temperature measuring operation switch 9 to expose the temperature measuring operation switch. In the exposed state, the pressing operation surface of the temperature measurement operation switch 9 is
It is almost at the same height as the wide upper surface of the main body case 2, and 9c (Fig. 1) is a recessed opening inclined surface on the circumferential surface of the opening 22 provided in the main body case 2 for the temperature measurement operation switch 9. It is. The operation surface of the temperature measurement operation switch 9 is made elongated in the direction perpendicular to the long axis of the elongated main body case 2, as shown in the figure, to prevent malfunctions caused by pinching with a fingertip or external pressure from clothing. It can be prevented.

A display holder 7 fixes the display 6 to the circuit board 3.

This indicator 6 is located at the bottom of the recessed opening slope 6c of the second opening 21. For this reason, the heights of the display surfaces and switch operation surfaces of the adjacent first and second openings 21 and 22 are different, allowing you to quickly determine which side you are touching by just lightly touching them with your fingertips. is guided to the second opening 22 for exposing the display surface, which has a low height on the upper surface, and is stabilized. It can be pulled out and handled without causing malfunction of the temperature measurement operation switch 9.

In addition, since the display surface of the display device 6 is sufficiently recessed inward from the outer surface of the main body case 2, it is not only unnecessary to provide a concave shape for placing a finger as described above.
It will not be damaged by external force or become difficult to read due to dirt.

10 is a battery for power supply, for example, a silver oxide battery, 1
1 is a battery case detachably provided at the rear end of the main body case 2; 11a is a tongue part integrally provided at the end of the battery case 11 and inserted into the main body case 2; 12 is a tongue part provided under the battery case 11; Further, a terminal 14 corresponds to the negative pole of the battery 10, and a terminal 14 corresponds to the positive pole of the battery 10, which is attached to the circuit board 3. These parts constitute a power supply section 20.

Note that the thickness B of the tongue portion 11a is equal to the distance between the back surface of the circuit board 3 held by the ribs 4 of the main body case 2 when it is not elastically deformed and the inner wall of the main body case 2 facing thereto. Thereby, when the temperature measuring operation switch 9 is pushed in the direction of arrow C, the tongue portion 11a receives the pushing force without causing deformation of the circuit board 3.

12a (Fig. 3) is a convex portion provided integrally with the terminal 12 near the tongue portion 11a of the terminal 12;
It sticks out a little more than that. Reference numeral 13 denotes a hole provided at the rear end of the circuit board 3, which engages with the convex portion 12a.

In FIG. 3, 15 is a back cover that covers an opening 23 provided on the back side of the main body case 2, that is, the wide lower surface on the opposite side from the display 6, in order to adjust each part of the temperature measurement circuit section 19, and 16 is a back cover. 15 is inserted into and engaged with the main body case 2 by means of locking claws provided integrally at both ends thereof. Reference numeral 17 indicates a boss for positioning the circuit board 3, which is integrally provided inside the back cover 15, and reference numeral 18 indicates a hole provided in the circuit board 3 that engages with the boss 17.

Next, the assembly order of the electronic thermometer of this embodiment configured as described above will be explained.

First, insert the lead wire of temperature sensing part 1, which is made by putting a thermistor into an aluminum cap and fixing it with silicone adhesive, into the hollow shaft at the tip of main body case 2, and connect temperature sensing part 1 and main case 2. Glue and fix. Next, external circuit components 8a to 8f are attached to the back side of the circuit board 3 to which the IC 5 is wire-bonded.
After soldering the positive terminal 14, a liquid crystal display 6 is attached to the surface of the circuit board 3 via a display holder 7, and a temperature measuring operation switch 9 is bonded. The above component-mounted circuit board 3 is inserted into the main body case 2 through the opening of the battery case 11 at the rear end of the main body case 2. At this time, as described above, only the front side of the circuit board 3 is held by the ribs 4, so even if the temperature measurement operation switch 9 is fixed and protrudes from the circuit board 3, the temperature measurement operation switch 9 cannot be moved. The elastic circuit board 3 is pushed and bent until the convex part enters the corresponding opening 22 of the main body case 2, and can be mounted in a predetermined position.

Next, a soldering iron is inserted through the circuit adjustment opening 23 covered by the back cover 15 of the main body case 2, and the lead wires of the temperature sensing section 1 are connected to the corresponding locations on the circuit board 3.

Next, put the negative terminal 12 under the battery case 11, and use the soldering iron to
A part of the terminal 12 is thermally deformed to fix the terminal 12 so that it does not fall off.

Furthermore, a battery case 1 containing a silver oxide battery 10
1 into the opening at the rear end of the main body case 2. Here, after the convex part 12a of the terminal 12 provided on this battery case 11 pushes up the circuit board 3, it enters the hole 13 of the circuit board 3, so that the user who is replacing the battery is forced to "snap". This provides a click feeling to confirm that the battery case 11 has been installed in a predetermined position.

After that, put the temperature sensing part 1 attached to the main body case 2 into a constant temperature water bath for adjustment, and use the adjustment trimmer from the opening 23 on the wide bottom surface of the main body case 2 so that the displayed value on the display 6 becomes the predetermined temperature. Adjust 8c.

Next, after verifying the measurement accuracy of the product, when the back cover 15 is pushed into the wide bottom opening 23 of the main body case 2, the positioning boss 17 inside the back cover 15 fits into the hole 18 of the circuit board 3 and is positioned. At the same time, the claws 16 at both ends of the back cover 15 engage with the main body case,
The back cover 15 is attached and the assembly of the electronic thermometer is completed.

Next, the operation of the electronic thermometer of this embodiment when used will be explained.

That is, when the user takes a temperature measurement using this electronic thermometer, first, when the user presses down the temperature measurement operation switch 9 so that his/her finger touches the opening slope 9c of the main body case 2, the circuit board 3 is pressed against the pressed conductive rubber 9b.
However, as mentioned above, this force is supported by the tongue portion 11a of the battery case 11, so that the circuit board 3 is not deformed in a direction perpendicular to its surface and is therefore not damaged. .

In addition, by using this electronic thermometer,
When replacing the battery 10 because the battery 10 has been exhausted and the voltage has decreased, the battery case 11 is pulled out from the main body case 2 rearward and a new battery 10 is installed there. Here, when pulling out the battery case 11, the circuit board 3 is connected to the negative terminal 12.
Due to the engagement between the protrusion 12a and the hole 13, the battery case 11 is pulled out to the rear along with the battery case 11.
Back cover 15 fixed to main body case 2 with claws 16
Since the boss 17 of the circuit board 3 is fitted into the hole 18 of the circuit board 3, the circuit board 3 does not move, so that the lead wire connected to the temperature sensing part 1 is stretched and disconnected. The temperature detection operation switch 9 is prevented from being mechanically damaged.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a flat main body case, a temperature sensing section provided at the front end of the main body case, a temperature measuring circuit section including a circuit board, a body temperature measurement value display, a power supply section, and In an electronic thermometer equipped with a temperature measurement operation switch, a first opening that exposes the temperature measurement operation switch and a second opening that exposes a display are provided adjacent to each other on a wide surface of the main body case,
The peripheral surfaces of both openings are sloped in a concave manner, and the temperature measurement operation switch and display are placed on the wide side of the flat main body case, making the operation and display surface relatively wide, making it easy to use even for inexperienced users. Easy to operate and read.

Moreover, when you pick it up with your fingertips and insert it into and out of your armpit,
Making the operating surface wider can easily lead to erroneous operation, but since the operating surface of the temperature control switch and the display surface of the display are adjacent to each other and have different amounts of exposure, it is easy to quickly determine which surface is being touched by just lightly touching it with your fingertips. The fingertip is naturally guided to the second opening side where it can be distinguished and the amount of exposure is small, and this hook allows the thermometer to be reliably inserted and removed from under clothing.

[Brief explanation of drawings]

1 is an external front view of an electronic thermometer according to an embodiment of the present invention, FIG. 2 is a front sectional view of the electronic thermometer shown in FIG. 1, and FIG. 3 is a plan sectional view of the electronic thermometer shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Temperature sensing part, 2... Main body case, 3... Circuit board, 6... Display unit, 6c... Opening inclined surface, 9...
...Temperature measurement operation switch, 9c...Opening slope, 10
... Battery, 19 ... Temperature measurement circuit section, 20 ... Power supply section, 21 ... Second opening, 22 ... First opening.

Claims (1)

[Claims] 1. In electronic thermometers that are equipped with a flat main body case, a temperature sensing part provided at the front end of the body case, a temperature measurement circuit part including a circuit board, a body temperature measurement value display, a power supply part, and a temperature measurement operation switch, the width of the main body case is A first opening that exposes the temperature measurement operation switch and a second opening that exposes the display are provided adjacent to each other on the surface side, and the peripheral surface of both openings is sloped in a concave manner to operate the temperature measurement operation switch. An electronic thermometer characterized in that the surface is approximately at the same height as the wide surface of the main body case, and the display surface of the display is located at the bottom of the recess.