JPS5814629B2 - Daiperyou digital densidium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital electronic watch for divers that allows the time to be read even when the water is deep and the surroundings are dark.

Clocks with luminous paint applied to the hands and time scales have been proposed so that the time can be read in the dark, and the same measures have been taken for diver watches.

However, in deep water where the amount of sunlight passing through is reduced and it is dark, reading the time becomes extremely difficult, even if the hands and time dials are coated with luminous paint.

In addition, conventional diver watches display the time and remaining time on oxygen cylinders, etc. in analog form.
In particular, it has the disadvantage that it is difficult to directly read the remaining time.

Therefore, the present invention makes it easy to read the time by digitally displaying the time, and at the same time, when the water reaches a predetermined depth, the display device using a self-luminous display element such as a light emitting diode stops display operation. The present invention proposes a digital electronic watch for divers that allows the time and other information to be easily read even in dark surroundings, and the details thereof will be explained below based on the illustrated embodiment.

FIG. 1 is an external view showing an embodiment of a diver's watch according to the present invention, in which a side 1 has a display section 3 for displaying the time and a display section 4 for displaying the remaining time with respect to a preset time. Window 5 fitted with glass that allows you to see through panel 2
is formed.

In addition, on the side 1 there is a crown 6 which is operated to set the operating time of the oxygen cylinder or to adjust the time, and a pressure sensitive button 8 of the water pressure detection device 7 whose details are shown in Fig. 2. is slidably provided.

FIG. 2 shows a specific example of the water pressure detection device 7, in which a cylinder 9 that slidably accommodates the pressure-sensitive button 8 described above is fixed through the side 1.

In this embodiment, the pressure-sensitive button 8 has a rod shape with a circular cross section, and a groove 10 formed in a part of the side surface is equipped with a ring-shaped packing 11, which connects the cylinder 9 and the pressure-sensitive button 8. The pressure button 8 is made watertight.

The rear end region of the pressure-sensitive button 8, which is close to the inner surface of side 1, is formed to have a smaller diameter than the tip protruding from the outer surface of side 1, and the gap created between the rear end region and the cylinder 9 is provided with expansion elasticity. It is equipped with an attached coil spring 12.

One end of the coil spring 12 is in contact with a part of the pressure sensitive button 8, and the other end is in contact with a part of the cylinder 9.

In addition, a part of the pressure sensitive button 8 has a coil spring 12.
An E IJ ring 13 is fitted to prevent the pressure sensitive button 8 from slipping out of the cylinder 9 due to its elasticity.

Inside the side 1, a pair of contact members 15 and 16 constituting the switch 14 are disposed facing each other, and a part of the contact member 15 faces the rear end of the pressure-sensitive button 8, so that the pressure-sensitive button 8 is activated by water pressure. By being moved to the right in FIG. 2 against the elasticity of the coil spring 12, the contact member 15 is pressed and comes into contact with the contact member 16.

As shown in FIG. 3, water depth and water pressure are proportional; for example, at a water depth of 4 m, the force applied to the pressure-sensitive button 8 with a diameter of 4 mm is approximately 50 g.

Therefore, if a coil spring 12 with a spring pressure of 40 g is used, the pressure sensitive bokun 8 will move and the switch 14 will be closed at a depth of 4 m.

Note that the water depth at which the switch 14 is closed is determined by pressing the pressure-sensitive button 8.
It can be arbitrarily selected by appropriately setting the cross-sectional area of the coil spring 12 or the elasticity of the coil spring 12.

Next, details of an embodiment of a diver's watch according to the present invention will be explained based on the circuit diagram shown in FIG.

In FIG. 4, reference numeral 17 is an oscillation circuit using a crystal oscillator or the like, and the oscillation signal is transmitted to a frequency dividing circuit 18 consisting of a plurality of vertically connected dividing stages, which is used as a reference for time measurement.
For example, the frequency is divided into a 1 Hz reference signal.

The reference signal obtained by the frequency dividing circuit 18 is input to a sexagesimal counter 19.

The counter 19 outputs minute pulses at a rate of one per minute, and these minute pulses are input to the first time counter 20 and the second time counter 26 via the control circuit 25.

The first time counter 20 includes a decimal addition counter 21, a hexadecimal addition counter 22, and a 1
It is composed of a 0-base addition counter 23 and a binary addition counter 24, and the addition counters 21 and 22 correspond to the "minute" of the time.
The addition counters 23 and 24 are counters on the "hour" scale of time.

The second time counter 26 includes a decimal subtraction counter 27, a hexadecimal subtraction counter 28, and a 1
The subtraction counters 27 and 28 are composed of a 0-base subtraction counter 29, and the subtraction counters 27 and 28 are used to calculate the preset time and the remaining time.
The subtraction counter 29 is a counter on the "minute" scale, and the subtraction counter 29 is a counter on the "hour" scale.

The count contents of each of the addition counters 21 to 24 of the first time counter 20 are outputted as a BCD code, and sequentially and cyclically supplied to the decoder 32 via the time division circuit 31.

The time division circuit 31 uses a frequency division signal obtained from a predetermined frequency division stage of the frequency division circuit 18, for example, when the duty ratio is 1/4.
The operation of each addition counter 21 to 24 is controlled by a control pulse from a pulse generation circuit 48 which cyclically generates four control pulses with a phase difference corresponding to each pulse width.
The output is time-divided and passed through the decoder 32.

The output of the decoder 32 is supplied to a segment driver 33, and the output of the segment driver 33 is further supplied to a display device 34.

The display device 34 corresponds to the display unit 3 on the display panel 2 in FIG. 1, and has four display elements corresponding to the addition counters 21 to 24, respectively.

The display element has seven segments and digit electrodes arranged in a Japanese character shape. The output of the segment driver 33 is commonly applied to the segments of each display element, and the digit electrodes are applied to the digit electrodes. Digit drive pulses output from the driver 35 are sequentially and cyclically applied.

The operation of the digit/driver 35 is controlled by the four control pulses from the pulse generation circuit 48 mentioned above, and the time division circuit 3
In conjunction with the operation in step 1, the display device 34 is dynamically driven, and the count contents corresponding to the time outputted from the first time counter 20 are digitally displayed on the display device 34, that is, the display section 3.

a subtraction counter 27 constituting the second time counter 26;
The count contents output from 28.29 as BCD code are as follows:
It is sequentially and cyclically supplied to a decoder 37 via a time division circuit 36, and the output of the decoder 3T is supplied to a segment driver 38, and the output of the segment driver 38 is further supplied to a display device 39. .

The display device 39 corresponds to the display section 4 on the display panel 2 in FIG. 1, and has three display elements corresponding to the subtraction counters 27, 28, and 29, respectively.

The output of the segment driver 38 is applied to each segment of each display element of the display device 39, and the digit drive pulse output from the digit driver 40 is sequentially applied to the digit electrode of each display element in a cyclic manner. is applied to

The operation of the time division circuit 3G and the digit/drive 40 is controlled by three of the four control pulses output from the pulse generation circuit 48, and the display device 39
is dynamically driven to display the count contents of the second time counter 26 on the display device 39, that is, the display section 4.

The display devices 34 and 39 in this embodiment use self-luminous display elements, for example light emitting diodes, and the operation of the pulse generation circuit 48 is controlled by the switch 14 of the water pressure detection device 7 shown in FIG. The display operates by

That is, when the switch 14 is in an open state, the pulse generating circuit 48 becomes inactive and stops generating control pulses, and operates when the switch 14 is closed to generate control pulses.

The switch 14 is closed when the pressure-sensitive button 8 of the water pressure detection device 7 moves at a predetermined water pressure, and can also be closed by manually pressing the pressure-sensitive button 8.

Therefore, the display devices 34 and 39 are normally inactive to reduce power consumption, but when the pressure-sensitive button 8 is pressed or moved by water pressure, the switch 14.
The display operation is performed in response to the closing of the display.

Reference numeral 41 is a time setting circuit for presetting, for example, the usable time of an oxygen cylinder in the second time counter 26. When the switch 42 is closed by operating the crown 6 shown in FIG. , 11 obtained from the frequency dividing circuit 18
A Hz reference signal is supplied to the subtraction counter 27, when the switch 43 is closed, the reference signal is supplied to the subtraction counter 28, and when the switch 44 is closed, the reference signal is supplied to the subtraction counter 27.
Supply to 9.

That is, by operating the switches 42, 43, 44 as appropriate, the reference signal is selectively supplied to the subtraction counters 27, 28, 29 via the time setting circuit 41, and the counting contents of each subtraction counter 27 to 29 are made faster. It changes with speed and can be set to the required count contents.

A control circuit 25 provided between the counter 19 and the second time counter 26 controls the supply of minute pulses from the counter 19 to the second time counter 26.
The operation is controlled by a switch 45 that is closed by operating the crown 6.

If switch 45 is open, control circuit 25 transfers the minute pulse from counter 19 to second hour counter 26.
If the switch 45 is closed, the minute pulse is supplied to the second hour counter 26.

That is, when the switch 45 is open, the switches 42, 43, and 44 are closed to set the desired time in the second time counter 26, and then the switch 45 is closed. Minute pulses begin to be supplied to the time counter 26, and measurement of remaining time begins.

Note that when setting a desired time on the second time counter 26, the pressure-sensitive button 8 is pressed and the switch 14 is pressed.
The set time is displayed on the display section 4 by closing the display device 39 and operating the display device 39 for display.

In the digital electronic watch for divers according to the present invention having such a configuration, when diving to a predetermined depth, the switch 14 is closed by the pressure-sensitive button 8 of the water pressure detection device 7, and at the same time, the display device 34, 39 is driven to display. .

In this embodiment, since the display devices 34 and 39 are composed of self-luminous light emitting diodes, the time and remaining time can be reliably read even in a dark underwater environment, and the time and remaining time can be read digitally. Since it is a display, it is easy to read.

Although the details of the electronic watch for divers according to the present invention have been explained above based on the illustrated embodiments, the present invention is not limited to the illustrated embodiments, and various changes or improvements can be made. be.

For example, the display device that displays the time and remaining time is driven by a dynamitter, but it is also possible to drive it by a statitter, and by operating the crown 6, a reference signal is appropriately supplied to each addition counter of the first time counter. It is also possible to adjust the time using the time counter, and also to supply a reset signal to each of the first and second time counters to reset them.

Furthermore, it is also possible to provide a mechanism that can vary the expansion elasticity of the coil spring of the water pressure detection device, so that the water depth at which the display device becomes visible in a dark place underwater can be appropriately set.

As described above, the electronic watch for divers according to the present invention is provided with a water pressure detection device, and in response to detection of a predetermined water pressure by the water pressure detection device, the time and other displays on the display device become visible, so that it can be used in the dark underwater. It is possible to read the time, etc. even in places, and since the time, etc. is displayed digitally, it is easier to read than analog displays, so it can fully achieve the intended purpose and is suitable for practical use. Some of the above effects are remarkable.

[Brief explanation of drawings]

FIG. 1 is an external view showing an embodiment of an electronic watch for divers according to the present invention, FIG. 2 is a sectional view showing a specific example of a water pressure detection device including the pressure-sensitive button shown in FIG. The figure is a diagram showing the relationship between water depth and water pressure, and FIG. 4 is a circuit diagram showing an embodiment of an electronic watch for divers according to the present invention. 2...Display lamp, T...Water pressure detection device, 8...Pressure sensitive button, 14...Switch, 17...Oscillation circuit , 18... Frequency dividing circuit, 20... First time counter consisting of an addition counter, 26... Second time counter consisting of a subtraction counter, 36.46. . . . Time display device, 41, 47 . . . Remaining time display device.

Claims (1)

[Claims] 1. It has a display device consisting of a self-luminous display element that digitally displays the time and the remaining time for a preset time, and a water pressure detection device that detects a predetermined water pressure,
A digital electronic watch for divers, characterized in that the water pressure detection device drives the self-luminous display device in response to predetermined water pressure or manual operation.