JPS6362715B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timepiece equipped with a depth gauge.

In general, divers need to carry a depth gauge to know how deep they are currently diving, as well as to know the duration of the dive and how much oxygen will remain in the oxygen tank. It is also necessary to carry a watch. Therefore, JP-A-55-
As shown in Japanese Patent No. 128113, it has been considered to incorporate a water depth gauge into an electronic wristwatch.

However, since the above-mentioned watches with depth gauges simply display the water depth digitally, even if a diver reaches a dangerous depth, he or she will not be able to tell unless he or she reads the current depth of the water. It was extremely dangerous for divers.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 52-10776, it has been considered to equip a watch with a warning device that issues a warning when a dangerous water depth is reached. However, in this warning device, dangerous water depth is detected by a pressure-sensitive button movably installed in the case being pushed by water pressure against the elasticity of a coil spring, closing a switch inside the case. Therefore, it is not possible to accurately detect the dangerous water depth, and setting the dangerous water depth requires changing the coil spring, which is troublesome. Further, in the case of the above-mentioned watch, although it is possible to know when the dangerous water depth has been reached, it is not possible to know how far beyond the dangerous water depth there is, which is insufficient for safety.

This invention was made based on the above circumstances, and its purpose is to not only accurately notify that a preset water depth has been reached, but also to easily preset the preset water depth. To provide an electronic watch with a water depth gauge capable of knowing how much water is left at a set water depth.

Hereinafter, the present invention will be specifically described based on an embodiment shown in the drawings. FIG. 1 is a circuit diagram of an electronic timepiece with a depth gauge to which the present invention is applied. In the figure, numeral 1 is an oscillation circuit that generates a reference clock code, 2 is a frequency divider circuit that divides the reference clock signal into a signal with a one-minute cycle, and 3 is a frequency divider that counts and divides the one-minute cycle signal. A time counter 4 obtains time information on the hour, and 4 is a calendar counter that counts the carry signal output from the time counter 3 to obtain calendar information on the date and day of the week. Then, the time information obtained by the time counter 3 and the calendar counter 4
The calendar information obtained is sent to the display device 6 via the AND gate 5. This display device 6 is
For example, it is composed of a liquid crystal display device,
It is configured to digitally display input information.

On the other hand, reference numeral 7 is a water depth sensing device that detects the water depth and outputs an analog signal. (referred to as a circuit) 8, and is converted into digital water depth value information. Digital water depth value information output from the A/D conversion circuit 8 is given to an OR gate 9. Any water depth value information preset in the water depth memory circuit 10 is also input to this OR gate 9, and each water depth value information output from this OR gate 9 is sent to the display device 6 via an AND gate 11. will be displayed. Also, A/
Each water depth value information outputted from the D conversion circuit 8 and the water depth storage circuit 10 is also given to the comparison circuit 12. This comparison circuit 12 compares the magnitude of each input water depth value information, and when both water depth value information become equal, it outputs a coincidence signal and provides it to the vibrating device 13 as a drive signal. This vibration device 13 drives a diaphragm for a predetermined period of time (for example, 5 seconds) after the drive signal is input, and the vibration of this diaphragm is transmitted to the skin of the human body, providing a tactile sensation to the user. issue a warning.

Reference numerals S ₁ to _{S 4} indicate manual switches provided outside the timepiece, and operation signals from each of the switches S ₁ to _{S 4} are applied to corresponding one-shot circuits 14 to 17 to output pulse signals, respectively. The pulse signal output from the one-shot circuit 14 is applied to the T input terminal of a binary flip (hereinafter abbreviated as T-FF) 18 to invert its output state. This side output signal (reset signal) of T-FF18 is AND gate 5 and 21
is given as a gate control signal to
The side output signal (set signal) is given to AND gate 11 as a gate control signal.

Next, the configuration of a preset circuit for presetting desired water depth value information in the water depth storage circuit 10 will be explained. The pulse signal output from the one-shot circuit 15 is applied to a decoder 19 having an AND gate function. Furthermore, the pulse signal output from the one-shot circuit 16 is transmitted to the T-FF 20.
is applied to the T input terminal of , and inverts its output state. The Q-side output signal of the T-FF 20 is applied to an AND gate 21 into which the Q-side output signal of the T-FF 18 is input, and the output signal of the AND gate 21 is applied to a decoder 19. Further, the pulse signal output from the one-shot circuit 17 is given to a 3-bit shift register 22,
The contents are shifted one bit at a time. Among the bit outputs of this shift register 22, the second bit output is a digit selection signal X that selects a digit in units of 10m.
Also, the output of the third bit is given to the decoder 19 as a digit selection signal Y for selecting a digit in units of 1 m. When the output signal of the AND gate 21 is input, this decoder 19 receives a pulse signal from the one-shot circuit 15.
A one-shot pulse preset signal X'.Y' corresponding to the digit selection signal XY is output, and the water depth memory unit 10
give to The water depth storage section 10 is configured so that each time the preset signal X'.Y' is input from the decoder 19, the content of the corresponding digit is incremented by one.

The structure of the electronic wristwatch is as shown in FIGS. 1 and 2 in FIGS. 2 and 3. Second
The figure is an exploded perspective view of an electronic wristwatch, in which reference numeral 23 denotes a watch case, 24 a module housed in the watch case 23, and 25 a pressure displacement plate 25a whose plate surface is displaced by bending in response to water pressure. 26 is a waterproof packing made of an elastic material, and 27 is a back cover having a plurality of through holes 27a formed on the circumferential side thereof. Further, FIG. 3 1 shows a vertical cross-sectional view of the main parts of the wristwatch in an assembled state, and the waterproofness of the watch case 23 and the bottomed cylindrical body 25 is determined by the presence of water between the back cover 27 and the bottomed cylindrical body 25. The bottomed cylindrical body 25 is held in close contact with the watch case 23 under the elastic force of the waterproof gasket 26.
Note that reference numeral 25b is a case provided inside the bottomed cylindrical body 25, and a third
As shown in FIG. 2, there is a plunger 28 whose tip contacts the pressure displacement plate 25a and moves vertically in the figure due to the displacement of the pressure displacement plate 25a; Therefore, a coil 29 that generates an electromotive force is provided. In addition, the pressure displacement plate 25a, the plunger 28,
The coil 29 constitutes the water depth sensor 7.

Next, the operation of the above embodiment will be explained. First, when the Q side output signal of the T-FF 18 is set to the binary logic level "1", the AND gate 5 is deregulated, so the time information of the time counter 3 and the calendar information of the calendar counter 4 are For example, as shown in FIG.
"minute" and "FR (Friday) 28th" are displayed digitally.

In this normal watch mode, when the switch _S1 is operated once, the output state of the T-FF 18 is inverted and its Q side output signal is set to "1". As a result, the AND gate 11 is deregulated, and the water depth value information from the A/D conversion circuit 8 and the water depth storage circuit 10 is sent to the liquid crystal display device 6. In this case, in normal times, that is, when not diving and before the depth value information is preset in the depth storage section 10, the display device 6 shows the contents of the A/D conversion circuit 8 and the depth storage circuit 10. A certain “O”
is displayed digitally.

In this depth gauge mode, operate switch S ₃ to reverse the output state of T-FF20 and change its Q
When the side output signal is set to "1", an output is obtained from the AND gate 21, and this state becomes a preset possible mode. In this preset possible mode, when switch _S4 is operated, a pulse signal is output from the one-shot circuit 17 and given to the shift register 22.
The contents of are shifted according to the number of times the switch S is operated. At this time, when a signal of "1" is set in the second bit of the shift register 22, a digit selection signal X in units of 10 m is outputted from the shift register 22 and given to the decoder 19. In this state, when switch S ₂ is operated, decoder 1
From 9, a one-shot pulse preset signal X is output every time switch _S2 is operated.
The contents of the 10m unit digit of the water depth memory circuit 10 are incremented by +1. Therefore, 10m depending on the number of operations of Switch S ₂
Water depth value information of ~90 m can be preset in the water depth memory circuit 10. Similarly, when the third bit of the shift register 22 is set to a signal of "1", the shift register 22 outputs a digit selection signal Y in units of 1m, so in this state,
When the switch _S2 is operated, a one-shot pulse preset signal is output according to the number of times the switch _S2 is operated, and can be preset in the water depth memory circuit 10 as water depth value information of 1 m to 9 m. In addition,
The water depth value information preset in the water depth memory circuit 10, for example "30 m", is digitally displayed as shown in FIG. 42. In this case, when not diving, the upper row of the display device 6, that is, the displayed content of the water depth value remains "O".

After completing the operation of presetting the desired water depth value information in the water depth memory circuit 10 in this way, operate switch _S4 again to set T-FF2.
The output state of 0 is inverted and the preset enable mode is released.

However, when the diver is in depth finder mode,
When diving with the watch worn on the wrist, water pressure is applied to the pressure displacement plate 25 through the through hole 27a of the case back 27.
a, the pressure displacement plate 25a bends greatly in accordance with the water pressure, as shown by the dashed line in FIG.
Push down the plunger 28. As a result, an electromotive force is generated from the coil 29, so that the water depth is sensed by the water depth sensor 7 in an analog manner. The analog signal output from the water depth sensor 7 is converted into digital water depth value information by the A/D conversion circuit 8, and the converted water depth value information is sent to the display device 6 to display the current water depth, for example, " 34m50
cm" is digitally displayed together with the preset water depth information "30 m", as shown in FIG. 4.

Similarly, the water depth value information from the A/D conversion circuit 8 and the water depth storage circuit 10 is sent to the comparison circuit 12, and the magnitude of both water depth value information is compared.
Then, as a result of this comparison, if it is determined that both water depth value information are equal or that the current water depth value information is larger than the preset water depth value information,
A command signal is outputted from the comparator circuit 12 to drive the vibrating device 13, so that a tactile alarm is generated to the diver, informing the water depth memory circuit 10 that the preset water depth value has been reached.

By presetting the critical depth value in the water depth memory circuit 10 in this way, the diver can know when the critical depth has been reached.

Note that the water depth value information that has been preset in the water depth storage circuit 10 is stored and retained unless a new presetting operation is performed. If you want to preset a new water depth value, you can preset the desired water depth value in the same way. Further, when the diving time is in the depth gauge mode, if you want to know the time, operate the switch _S1 to switch back to the clock mode, and the display device 6 will display the time and date.

In the above embodiment, a vibrating device was used as the alarm generating device, but it may also be a sounding device or an optical display device, or an optical display device may be used to generate a flashing display to generate the alarm. It may also be configured to occur.

As explained in detail above, this invention sets the set water depth value as a digital value in the storage means, so it can be set accurately, and the fact that the set water depth value has been reached can be indicated by the digital measurement value and the digital value. Since the detection is performed by comparing the water depth with the set value, it is possible to accurately detect that the set water depth value has been reached. In addition, since the measured water depth value information outputted from the measured water depth value information generation means and the set water depth value information stored in the storage means are simultaneously switched and displayed on the digital display means that displays time information and date information, the current You can know how far the water depth is from the set water depth value such as the dangerous water depth value.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a circuit diagram of an electronic wristwatch with a depth gauge to which the invention is applied, FIG. 2 is an exploded perspective view showing the structure of the electronic wristwatch, and FIG. A vertical cross-sectional view of main parts of the electronic watch,
FIG. 3 2 is a diagram schematically showing the structure of the water depth sensor, and FIGS. 4 1 to 3 are diagrams showing display states. 6...Display device, 7...Water depth sensor, 8...
A/D conversion circuit, 10...Water depth memory circuit, 12...
... Comparison circuit, 13... Vibration device.

Claims (1)

[Claims] 1. Counting means 3, 4 for counting reference signals to obtain time information and date information, digital display means 6 for displaying the time information and date information obtained by the counting means 3, 4, and a digital display means 6 for detecting water depth. Measured water depth value information generating means 7, 8 for outputting digital measured water depth value information, storage means 10 for storing digital preset water depth value information preset from the outside, and output from the measured water depth value information generating means 7, 8. Display control means S1, 14, 18, 5, 9 for simultaneously displaying the measured water depth information stored in the storage means 10 and the set water depth information stored in the storage means 10 on the digital display means 6 instead of the time information and date information; 11
and a comparing means 12 for comparing the measured water depth value information and the set water depth value information, and generating an alarm when the comparing means 12 detects a match between the measured water depth value information and the set water depth value information. An electronic watch with a water depth gauge, which is equipped with an alarm generating means 13.