JPS587955B2 - digital science - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital electronic timepiece having an alarm device, or an accessory device such as a stopwatch device or a calendar device.

Conventionally, some digital electronic watches have attached devices such as an alarm device, a stopwatch device, and a calendar device, and are always used in an upright position.

However, since it must be kept upright at all times, it is disadvantageous in terms of design and is inconvenient to handle.

Therefore, it is conceivable to configure the digital electronic timepiece so that its posture can be changed to an inverted position or the like.

However, in such a digital electronic timepiece, switches for operating accessory devices are moved to the bottom side due to a change in posture, making them difficult to operate.

Also, if the device is ultra-small, it will be difficult to operate the switches.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide a digital electronic timepiece that is configured to switch and control the operation of accessory devices according to the user's posture, has good operability, and is advantageous in terms of design.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a constant frequency reference signal from a time reference source 11 consisting of a crystal oscillator, AC power supply, etc. is transmitted to a frequency dividing circuit 1.
The frequency is divided by 2 into a signal of about 1 minute, that is, a signal of 1/60 Hz.

The output signal of this frequency dividing circuit 12 is applied to a clock counter 13 to count the time.

The output signal from the clock counter 13 indicating the time is applied to the decoder 15 through the multiplexer 14 and converted into a segment signal.

This segment signal and the 4-digit digit signal from the multiplexer 14 are synchronously converted into dynamic signals by the switching operation of the high frequency output signal from the intermediate stage of the frequency dividing circuit 12 in the multiplexer 14, and are converted into dynamic signals by the data selectors 16, 17. through the drive circuits 18, 19
In addition, the display body 20 having 7-segment number display elements for 4 digits is dynamically driven by the 1 drive circuits 18 and 19 to display the time.

Further, the alarm counter 21 is used to set the time at which an alarm sound is generated, and the alarm comparator 2
2 is the contents of this alarm counter 21 and clock counter 1
3 and when they match, that is, when the time to generate the alarm sound has arrived, an output signal is generated.

This output signal is applied by the alarm control circuit 23 to the speaker 24 when the digital electronic watch is inverted, and the speaker 24 emits an alarm sound.

The clock alarm correction circuit 25 corrects the time by manually applying a high frequency pulse from the intermediate stage of the frequency dividing circuit 12 to the clock counter 13 to correct the contents of the clock counter 13. 2
1 and a pulse from an intermediate stage of the frequency dividing circuit 12 to correct the time set in the alarm counter 21.

The switch SW switches the output signal between the time display on the display 20 and the alarm time display.

The data selector 16 is connected to the inverter 2 as shown in FIG.
7.28, resistors 29-40, and diodes 41-64.

When the digital electronic timepiece is upright, the attitude detection switch 65 is open, and the input terminal of the inverter 66 is grounded via a resistor 67 and has a low potential (hereinafter referred to as L).

Therefore, the output of the inverter 66 is at a high potential (hereinafter referred to as H), and the output of the inverter 27 is L and the inverter 2
The output of 8 becomes H.

Therefore, the diodes 59 to 64 are on and the diode 53
~58 is turned off.

The numeric display element in the display body 20 has seven segments a to g arranged in a Japanese character shape, as shown in FIG. 4, and is configured point-symmetrically.

The signal of the center segment g from the data recorder 15 is always driven as it is, and the signals of the other segments a to f are applied to the resistors 29, 31, 33...3
9 and diodes 41 to 51, the signals are directly applied to the drive circuit 18 as signals a' and f' for segments a to f.

When the digital electronic watch is inverted, the posture detection switch 65 is closed, the input terminal of the inverter 66 is connected to the power supply V+, the output of the inverter 27 is H, the output of the inverter 28 is L, and the diode 53 -58 is turned on and diodes 59-64 are turned off.

Therefore, the signal of center segment g is still applied to the drive circuit 18 as is, but segments a and b, b and e
, c and f are point symmetrical, and the positions of the digital electronic watch when it is upright and when it is inverted are interchanged from the perspective of a person reading the time, so the signal of segment a is transmitted through resistor 30 and diode 42. is applied to the drive circuit 18 as a signal d' of segment d.

And the signal of segment b is connected to resistor 32 and diode 44.
The signal of segment c is applied to the drive circuit 18 as a signal e' of segment e through a resistor 34 and a diode 46 as a signal f' of segment f.
Added to 8.

Furthermore, the signal of segment d is connected to a resistor 36 and a diode 48.
The signal of segment e is applied to the drive circuit 18 as a signal a' of segment a through a resistor 38 and a diode 50 as a signal b' of segment b.
8, and the signal of segment f is applied to drive circuit 18 through resistor 40 and diode 52 as signal c' of segment c.

As a result, during the royal period, for example, as shown in Figure 5a, 12
: When the number 58 is displayed upside down, 2 is displayed as ■, 5 is displayed as ■, and 8 is displayed as 8, as shown in Figure 5b, but the positional relationship with the person reading the time is upside down. Because of the orientation, for those who read the time, 2 will be correctly displayed as 2, 5 as 5, and 8 as 8.

Further, the data selector 17 is composed of inverters 68, 69, resistors 70-77, and diodes 78-93.

When the digital electronic timepiece is upright, the output of the inverter 66 is H, the output of the inverter 68 is L, and the output of the inverter 69 is H.

Therefore, the four-digit digit signal D1-D4 from multiplexer 14 is applied to drive circuit 19 through resistors 70, 72, 74, 76 and diodes 78, 80, 82, 84.

In addition, when the digital electronic watch is turned upside down, the display body 2
In the time displayed as 0, the upper and lower digits are reversed, that is, the left and right sides are reversed.

Then, the output of the inverter 66 becomes L, and the output of the inverter 68 becomes L.
The output of the inverter 69 becomes H and the output of the inverter 69 becomes L.

Therefore, the digit signal D from multiplexer 14
1 to D4 are applied to the drive circuit 19 through resistors 71, 73, 75, 77 and diodes 79, 81, 83, 85, with the upper digit side and lower digit side inverted.

As a result, the time displayed on the display 20 is displayed normally for the person viewing the time, as shown in FIG. 5b.

Further, the alarm control circuit 23 applies the output signal of the alarm comparator 22 to the speaker 24 when the digital electronic watch is turned upside down based on the output signal of the inverter 66.

Further, as shown in FIG. 6, the attitude detection switch 65 has a reed switch 87 arranged and fixed inside a cylinder 86 made of a non-magnetic material, and an annular permanent magnet 88 on the outside of this cylinder 86.
are movably fitted, and flanges 89 and 90 are attached to the tube 86.
The cylinder 86 is fixed to an appropriate location of the digital electronic watch with the tube 86 vertical.

When the digital electronic watch is upright, the sixth
As shown in Figure a, the permanent magnet 88 moves onto the flange 90 and is shifted from the outside of the reed switch 87, so that the reed switch 87 is opened.

When the digital electronic watch is turned upside down, the permanent magnet 88 moves onto the flange 89 and is positioned outside the reed switch 87, as shown in FIG. 6b, and the reed switch 87 is sensitive to the magnetic field of the permanent magnet 88. Closed.

Note that the data selector may be configured with a mechanical switch such as a relay, a Mos bilateral switch, or the like.

Further, the method for driving the display body is not limited to the dynamic drive method, and a static drive method may be adopted.

Furthermore, instead of the 7-segment display method, a dot display method using light emitting diodes or the like may be adopted.

Furthermore, we have adopted a dot display method in which numbers are displayed using elements arranged symmetrically in many directions, not just in the vertical direction.The position of the digital electronic clock is detected in each direction by a detector, and the signal is detected by a data selector. By performing the conversion, the time can be displayed normally regardless of the posture of the digital electronic watch, and the alarm device can be activated when the digital electronic watch is in a specific posture.

FIG. 7 shows another embodiment of the present invention, in which a stopwatch device is activated when the person is inverted.

That is, the stopwatch control circuit 91 manually applies a one-second cycle pulse from the intermediate stage of the frequency dividing circuit 12 to the stopwatch counter 92.

The posture detection switch is constituted by a switching contact 65', and connects the data selectors 15, 17 and multiplexer 14' to the DC power supply V+ when the digital electronic timepiece is upright, and to the ground point when the digital electronic timepiece is upright.

When standing upright, the multiplexer 14' is connected to the DC power supply V+ by the posture detection switch 65' and responds to the output signals of the frequency divider circuit 12 and the clock counter 13 in the same way as in the case of FIG. The time is displayed on the display 20 as shown in FIG.

As shown in FIG. 8b, when the digital electronic timepiece is held upside down by the handle 93, the multiplexer 14' is connected to the ground point by the attitude detection switch 65', and the frequency dividing circuit 12 and the stopwatch are connected to each other. counter 92
responds to the output signal of

Therefore, the display 20 is a stopwatch counter 92.
Display the contents normally.

The stopwatch control circuit 91 receives 1 from the frequency dividing circuit 12.
The operation of inputting second period pulses to the stopwatch counter 92 is started and stopped by manual operation of the operation switches 94 and 95.

Further, the clock correction circuit 96 manually inputs the pulse from the intermediate stage of the frequency dividing circuit 12 to the clock counter 13 and corrects its contents.

FIG. 9 shows still another embodiment of the present invention, in which a calendar device is activated when the machine is inverted.

That is, the calendar counter 97 is the same as the clock counter 13.
output signal is added to count the date.

When the multiplexer 14' is in the upright state, the output signal of the inverter 66 is added to the multiplexer 14', and the output signal is applied to the frequency dividing circuit 12 as in the case of FIG.
In response to the output signal of the clock counter 13, the time is displayed on the display 20 as shown in FIG. 10a.

Also, when the device is inverted, the multiplexer 14' responds to the output signals of the frequency divider circuit 12 and the calendar counter 97.

Therefore, the date, which is the content of the calendar counter 97, is displayed on the display body 20 in a normal position as shown in FIG. 10b.

Further, the clock calendar correction circuit 98 manually adds pulses from the intermediate stage of the frequency dividing circuit 12 to the clock counter 13 to correct its contents, and also manually operates the frequency dividing circuit 12
The pulse from the intermediate stage is added to the calendar counter 97 to modify its contents.

As described above, according to the digital electronic timepiece according to the present invention, since the operation of the attached device is controlled by switching according to the posture, the posture is not limited to the upright state, and it is extremely advantageous in terms of design and convenient in handling. At the same time, there is no need to switch and control the operation of attached devices using switches, making it easier to operate even ultra-small devices.

In addition, the switches can be provided at locations where they can be easily operated while the attached device is in an operating position, resulting in improved operability.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIGS. 2 and 3 are circuit diagrams showing a data selector in the same embodiment, and FIG. 4 is a one-digit segment of the display body in the above embodiment. Figures 5a and 5b are front views showing the above embodiment in an erect and inverted state, and Figs. 6a and 6b show the posture detection switch used in the above embodiment in an erect and inverted state. 7 is a block diagram showing another embodiment of the present invention, FIGS. 8a and 8b are front views showing the same embodiment in an upright state and an inverted state, and FIG. 9 is a block diagram showing another embodiment of the present invention. A block diagram showing still another embodiment, FIGS. 10a and 10b are front views showing the same embodiment in a royal state and an inverted state. 16, 17... Data selector, 23...
・・Alarm control circuit, 65, 65'・・・・
...Attitude detection switch 14'...Multiplexer.

Claims (1)

[Claims] 1. In a digital electronic watch that has a main body that divides a reference signal from a time reference source using a frequency dividing circuit to drive a display unit to display the time, and an accessory device that performs predetermined operations, the posture of the digital electronic watch What is claimed is: 1. A digital electronic timepiece comprising: a detector for detecting the oscilloscope; and a device for controlling switching of the operation of the accessory device in accordance with an output signal of the detector.