JPS6373183A - Electronic timepiece with bathometer - Google Patents

Abstract

PURPOSE:To obtain an electronic timepiece with a bathometer characterized by higher safety, by using a detected voltage signal and an operating signal for a mode switch as input signals, outputting a mode regulating signal, and turning OFF a mode designating and controlling circuits with the output signal. CONSTITUTION:A switch MS is normally OFF and a mode control signal PC is 'L'. Time-piece information PZ of a timepiece circuit 1 is outputted as display information PH from a display switching circuit 5. The time is displayed on a display device 7. When the MS is turned ON, the signal PC at 'H' turns ON a power-source control circuit 12 and a bathometer circuit 8 is driven. The circuit 5 outputs water depth information PS as the display information PH. The water depth is displayed on the device 7. At this time, the decrease in voltage of a power source battery BT is detected 17, and a signal PK is outputted. A battery life mark B is displayed through a decoder driver 6. When the MS is turned ON for diving at this time, a D-FF 16 reads the signal PK. A D-FF 14 is reset by a control signal PR, and the signal PC is not outputted. The designation of the function of the bathometer is inhibited, and only the time and the battery life are displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for predicting battery voltage life in an electronic timepiece with a depth gauge.

[Conventional technology]

In recent years, with the development of electronic watches, a wide variety of additional functions have been devised and provided to the market, but recently there has been a demand for electronic watches with depth gauges due to demands from sports enthusiasts, and some of them have not been provided to the market. However, the currently available electronic watches with depth gauges are only equipped with a clock circuit, a depth gauge circuit, and a voltage detection circuit. At times, it only displayed the battery life. Furthermore, in consideration of malfunctions when detecting the battery life, some models have been provided that display the battery life and also stop the depth gauge function.

[Problem that the invention seeks to solve]

In the aforementioned electronic watch with depth gauge, if the user activates the depth gauge function and detects a drop in battery voltage while diving, the battery life is displayed and the depth gauge function is stopped. The user was unable to obtain water depth information all of a sudden, causing anxiety and being unable to grasp the speed at which the user ascended to the surface, making the system extremely unfinished.

The present invention aims to solve the above-mentioned problems and to provide an electronic timepiece with a water depth gauge that is a complete system that does not pose a dangerous situation to the user.

[Means for solving problems]

In order to achieve the above object, the present invention has the following configuration. That is, in an electronic watch equipped with a power supply battery, a voltage detection circuit, a clock circuit, a depth gauge circuit, a display device, and a mode designation control circuit for specifying the operation of the depth gauge circuit, A mode regulation means is provided for inputting a detection signal of the voltage detection circuit and an operation signal of the mode switch and outputting a mode regulation signal, and the mode regulation signal is configured to set the mode specifying control circuit to a non-operating state. .

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a circuit block diagram of an electronic timepiece with a depth gauge showing an embodiment of the present invention, and FIG. 2 is a front view of the timepiece. 1
is a clock circuit, which consists of an oscillation circuit 2, a frequency division circuit 3, and a time measurement circuit 4. The frequency division circuit 3 receives the oscillation signal from the oscillation circuit 2 as input, performs a frequency division operation, and sends the frequency divided signal to the time measurement circuit 4. supplying.

The clock circuit 4 performs a clock operation and outputs clock information PZ.

8 is a water depth gauge circuit, which includes a water pressure sensor 9, a width increasing circuit 10,
It consists of a water depth measuring circuit 11, and the water pressure sensor 9 is made up of a semiconductor diaphragm or the like, and detects fluctuations in water pressure and outputs a sensor signal.

The amplification circuit 10 performs an amplification operation with the sensor signal as input, and supplies an amplification signal to the water depth measurement circuit 11, which converts water pressure into water depth and outputs water depth information PS.

Reference numeral 12 denotes a power supply control circuit, which is controlled by a mode control signal PC from a mode designation control circuit 16 to be described later, and when the mode control signal PC is at H level, it supplies power to the depth gauge circuit 8 to put it in an operating state. . Reference numeral 16 denotes a mode specifying control circuit, which is composed of a mode switch MS and a glu-taibe flip-flop (hereinafter abbreviated as T-FF) 14, and the mode switch MS is a switch that operates in conjunction with an external operating member. A switch signal is output from the MS and supplied to the clock input terminal φ of the T-FF 14. The T-FF 14 performs an inversion operation every time the switch signal is input, and outputs a mode control signal PC of H level and L level.

Further, the reset input terminal R is connected to a mode regulating means 15 which will be described later.
A mode regulation signal PR is inputted thereto, and a reset operation is performed when the mode regulation signal PR is output. BT
is a battery for power supply.

17 is a voltage detection circuit for detecting a drop in the voltage of the power supply battery BT, and outputs a detection signal PK. 15
is a mode regulating means, which is composed of data type flip-flops (hereinafter abbreviated as D-FF) 16;
The detection signal PK from the voltage detection circuit 17 is input to the data input terminal 16, and the clock input terminal φ
The mode control signal PC is input to the input terminal 1, and the data of the detection signal PK is read when the rising edge of the mode control signal PC is input, and the mode regulation signal PR is outputted from the output terminal Q.

That is, the voltage detection circuit 17 detects a drop in the voltage of the power supply battery BT and outputs the H level detection signal PK to the D-FF1.
When the mode control signal PC rises while being supplied to the data input terminal of the D-FF 16 (when the depth gauge mode is set), an H level mode regulation signal PR is output to the output terminal Q of the D-FF 16.

Reference numeral 5 denotes a display switching circuit, which inputs timekeeping information PZ from the clock circuit 1 and water depth information PS from the water depth gauge circuit 8, and receives a mode control signal P from the mode designation control circuit 13.
C selectively outputs the clock information PZ and water depth information PS as display information PH, and when the mode control signal PC is at L level, clock information PZ is output, and when it is at H level, water depth information PS is output as display information. Output as PH.

6 is a decoder driver circuit which uses the display information PH as input to display the time or water depth on the display device 7, and also receives the detection signal PK from the voltage detection circuit 17, and when the detection signal PK is at H level. That is, when a voltage drop of the power supply battery BT is detected, the display device 7
The battery life indicator mark B will be displayed.

Next, the operation in the above configuration will be explained.

In the normal state, the mode switch MS of the mode designation control circuit 13 is not operated, and therefore the mode control signal PC is not output. Display information PH
The time is displayed on the display device 7 as shown in FIG. 2(a).

When the user presses the mode switch MS once in order to dive from this state, the T-FF 14 outputs an H level mode control signal PC. When the mode control signal PC is output, the power supply control circuit 12 is operated, the water depth gauge circuit 8 is operated, and the narrow indication switching circuit 5 outputs water depth information PS as display information PH, so that the display device 7 The water depth is displayed. At this time, since the voltage of the power supply battery BT is sufficient, the voltage detection circuit 1
7, the detection signal PK remains at the L level, so the mode regulation signal P at the L level is output from the D-FF16.
R is being output.

Next, if the voltage of the power supply battery BT drops from this state, the voltage detection circuit 17 outputs an H level detection signal PK. When the detection signal PK is output, a second signal is sent to the display device 7 via the decoder driver circuit 6.
As shown in Figure (b), a battery life indicator mark B is displayed along with the water depth display.

However, at this time, even if the detection signal PK, which is the data input of the D-FF 16, is at the H level, the mode control signal PC remains at the H level, so the D-FF 16
The data input is not read, and the mode regulation signal PR at the output terminal Q remains at the L level. Therefore, the depth gauge circuit 8 continues to operate.

When the user finishes the diving operation from this state and operates the mode switch MS, the mode control signal PC goes low.
The display device 7 displays the time and battery life indicator mark B as shown in FIG.
is displayed.

Then, when the user operates the mode switch MS to try to dive again, the mode control signal PC changes from L level to H level, so the D-FF 16 reads the data input and outputs the H level mode from the output terminal Q. Outputs regulation signal PR. Therefore, since the T-FF 14 of the mode designation control circuit 16 is reset by the mode regulation signal PR, the mode control signal PC is not output, and designation of the depth gauge function is prohibited. The display device 7 displays a time display and a battery life display mark B as shown in FIG. 2(c), and the depth gauge circuit 8 does not operate.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, even if the power supply battery becomes low during diving, the depth gauge circuit continues to operate and display until the diving operation is completed, and only the battery life is displayed. By prohibiting the operation of the depth gauge circuit when the mode switch is operated to use the depth gauge circuit again, this technology greatly contributes to the provision of an electronic watch with a depth gauge equipped with a highly safe battery life system. It worked.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of an electronic timepiece with a depth gauge showing an embodiment of the present invention, and FIGS. It is. 1... Clock circuit, 8... Depth gauge circuit, 5... Display switching circuit, 16... Mode specification control circuit, BT...
- Power supply battery, 17...Voltage detection circuit, 15...Mode regulation means. Figure 2 (a) (b) - QQ- (8)

Claims (1)

[Claims] A power supply battery, a voltage detection circuit for detecting a drop in the power supply battery, a clock circuit, a depth gauge circuit, a display device, and a mode designation control circuit for specifying the operation of the depth gauge circuit. In an electronic watch with a depth gauge, inputting a detection signal of the voltage detection circuit and an operation signal of a mode switch,
1. An electronic timepiece with a depth gauge, characterized in that a mode regulating means for outputting a mode regulating signal is provided, and the mode specifying control circuit is set to a non-operating state by the mode regulating signal.