JPH0429435Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an electronic timepiece, and more particularly to an electronic timepiece in which various functions are displayed by a digital display unit that is removably provided on the main body of the timepiece.

[Background of the invention] In general, in electronic watches, adjustments to the time, calendar, alarm, timer, etc., and mode switching are performed using multiple pushbutton switches or touch switches using transparent electrodes. , since there are many switches exposed on the surface,
There are disadvantages such as the switch operation is complicated and difficult to understand, and there are many erroneous operations.

[Purpose of the invention] This invention was created in consideration of the above-mentioned circumstances.The purpose of this invention is to reduce the number of switches exposed on the surface, prevent erroneous operation of the switches, and easily and easily digitally operate the switches. It is an object of the present invention to provide an electronic timepiece in which each function of a display unit can be switched, and the display can be corrected and set.

[Main points of the invention] In order to achieve the above-mentioned purpose, this invention selects various functions by moving a multi-functional digital display unit that can be moved in and out of the watch body, and The digital display unit is set to a correction mode using the control switch, the correction switch corrects the information displayed on the digital display unit, and the correction is performed by re-operating the control switch and switching the function by the function selection means. This mode is designed to cancel the mode.

[Configuration of Embodiment] An embodiment of this invention will be described below with reference to FIGS. 1 to 5.

1A to 1C show an electronic wristwatch. This electronic wristwatch 1 is equipped with an analog clock section 2 and a digital clock section 3. The analog clock section 2 is in the analog storage section 4a in the watch case 4, and the digital clock section 3 is in the digital storage section 4b. Each is stored.

The watch case 4 is made of synthetic resin, and has watch bands 4c, 4c integrally formed at its front and rear ends.A watch glass 5 is attached to the top surface by a bezel 6, and an analog storage part 4a and an analog storage part 4a are provided inside. Digital storage section 4b is front and back (top and bottom in Figure 1B)
A back cover 7 is attached to the back surface (on the right side in the figure) via a waterproof gasket 8 with screws 7a. In this case, the analog clock section 2 and the digital clock section 3 partially overlap, and the lower right corner of the watch glass 5 is cut out into a substantially triangular shape, and this cut out lower right opening portion 4d A part of the digital clock section 3 can be seen from here. Further, each of the storage sections 4a and 4b for storing each of the timepiece devices 2 and 3 is opened to the back side and closed with a back cover 7. In this case, in particular, the digital storage section 4b has the above-mentioned lower right opening section 4d and its side opened, and a part of the digital watch section 3 can come out and go out of the watch case 4 from this open side. It is becoming more and more popular.

The analog clock section 2 indicates the time by moving the hands 9, and as shown in FIG. A dial 11 is arranged on the center left side), and above this dial 11 is the pointer shaft 1 of the analog block 10.
0b protrudes, and a pointer 9 is attached to this protruding pointer shaft 10b so as to be movable. In this case, the dial 11 is larger than the analog storage part 4a, and a part of it is placed overlapping the digital storage part 4b as shown in FIGS. I'm getting used to having good luck with the hands. Note that a reuse 12 for adjusting the time of the analog timepiece section 2 is provided on the side surface of the analog storage section 4a so as to protrude to the outside of the timepiece case 4.

On the other hand, the digital clock section 3 is a digital display unit equipped with a digital display device that electro-optically displays time, etc., and is housed in the digital storage section 4b so as to be freely retractable, as shown in FIGS. 1A to 1C. As shown in Figure 2 A to C, there are three types of functions, including a function to display the date and day of the week (date and day of the week mode), an alarm function (alarm mode), and a timer function (timer mode). It is designed to switch to the function, and the digital storage section 4b
A case 13 of the digital clock section 3 is placed inside. This case 13 slides along the front and rear walls inside the digital storage section 4b, and its right side protrudes to the outside of the watch case 4, and the upper part of the case 13 is located at the bottom right of the analog watch section 2. A triangular portion 13a corresponding to the opening portion 4d is formed high so as to be almost flush with the watch glass 5, and the other portions are formed one step lower. is case 13
It is long and narrow in the direction of movement. This protective glass 14 protects a liquid crystal display device 15, which will be described later, and is formed to be thick in the part corresponding to the lower right opening part 4d (the right side in FIG. 1C), and thin in the other part (left side). has been done. Further, below the protective glass 14, a liquid crystal display device 15 and a circuit board 1 are provided.
6, a battery 17, etc. are arranged. The liquid crystal display device 15 displays information such as date and time, and is arranged corresponding to the inner surface of the protective glass 14.
It is electrically connected to a circuit board 16 by an interconnector 15a. The circuit board 16 provides a drive signal to the liquid crystal display device 15 and also provides a drive signal to the analog block 10 of the analog clock section 2. On its lower surface, there are electronic devices such as a crystal oscillator 18, a trimmer capacitor 19, and an LSI 20. The analog block 10 is
electrically connected to. The battery 17 supplies power to the circuit board 16, and both electrodes thereof are connected to the circuit board 16.

Further, the digital clock section 3 is equipped with a mode changeover switch 21 as shown in FIGS. 2A to 2C. This mode changeover switch 21 changes the mode (the three types of functions mentioned above) of the digital clock section 3 in accordance with the operation of pulling out the case 13.
The case 13 includes two operators 21a and 21b.
located on the side of the That is, the operator 21a,
21b has leaf springs 23, 23 at their inner ends, respectively.
The digital clock part 3 is elastically biased by the user and moves in and out from the side wall of the case 13 in response to the pull-out operation of the case 13. As shown in FIG. 2A, the digital clock part 3 is stored in the digital storage part 4b. When the controllers 21a and 21b are in the watch case, the tips of the controls 21a and 21b protrude outward from the side wall of the case 13, and the protruding tips fit into the recesses 4b ₁ and 4b ₂ formed in the wall of the digital storage section 4b of the watch case 4. Since the opposite inner end is separated from the contact electrodes 16a, 16b provided on the circuit board 16 inside the case 13, the two operators 21a, 21b are turned off. In this state, the mode changeover switch 21 is set to the date/day of the week mode, and the liquid crystal display device 1 is set to the date/day mode as shown in FIG. 2A.
5 to display the date and day of the week. In addition, as shown in FIG. 2B, the digital clock section 3 is placed in the digital storage section 4b.
When one step is pulled out from the inside, each of the operators 21a and 21b moves in the same direction as the case 13 moves, and the tip of the right operator 21b is connected to the digital storage section 4.
b is pressed by the wall surface inside b, the opposite inner end conducts the contact electrode 16b on the right side of the circuit board 16 and turns on, and each tip of the other operator 21a is inserted into the adjacent recess 4b ₂ , and the opposite The inner end portion of the contact electrode 16a of the circuit board 16 is separated from the contact electrode 16a and turned off. In this state, the mode changeover switch 21 is set to the alarm mode, and the liquid crystal display device 1 is set to the alarm mode as shown in FIG.
The alarm time is displayed at 5. In addition, when the digital clock part 3 is pushed into the digital storage part 4b as shown in FIG. 2A in this state, the above-mentioned date and time will be displayed.
It becomes day of the week mode. Furthermore, as shown in FIG. 2C, when the digital clock section 3 is pulled out from the digital storage section 4b in two stages, the respective operators 21a and 21b move further as the case 13 moves, and the right side Each tip of the operator 21b is inserted into a recess _4b3 formed on the wall surface of the digital storage section 4b, and each opposite inner end is separated from the contact electrode 16b on the right side of the circuit board 16 and turned off. The tip of the other operator 21a is pressed against the wall inside the digital storage section 4b, and the opposite inner end makes the contact electrode 16a on the left side of the circuit board 16 conductive, thereby turning on. In this state, the mode changeover switch 21 is set to the timer mode, and the timer time is displayed on the liquid crystal display device 15 as shown in FIG. 2C.

Furthermore, as shown in FIG. 1, the digital timepiece section 3 has three push button switches S ₁ , S ₂ , and S ₃ provided on the side surface of the timepiece case 4 to correct and set three types of mode display. That is, control switch S ₁
When you press , the liquid crystal display device 15 of the digital clock section 3
It becomes possible to modify the information of the mode currently being displayed, and the display digits of the information that can be modified flash. When select switch _S2 is pressed in this state, a correction digit shift signal is output, and the digit of the information blinking on the liquid crystal display 15 can be advanced to change the correction digit. When ₃ is pressed, a "+1" set signal is output, and the correction digit of the information blinking on the liquid crystal display 15 is corrected by adding +1.

Next, the circuit configuration of the electronic wristwatch 1 as described above will be explained with reference to FIG.

The oscillation circuit (OSC) 24 provides an oscillation signal to a frequency dividing circuit (DIV) 25, and the frequency is divided by the frequency dividing circuit 25.
Of the frequency-divided signals output from the frequency dividing circuit 25, a 1 Hz signal is given to the motor drive circuit 26 of the analog clock section 2, which drives the analog block 10 to move the hands 9, and also drives the analog block 10 to move the hands 9. It is also given to the time counting circuit 27 of. The time counting circuit 27 counts the time based on the 1 Hz signal from the frequency dividing circuit 25 and provides time data to the display switching circuit 28 and the coincidence detection circuit 29. The coincidence detection circuit 29 is also given alarm time data stored in the alarm time storage circuit 32.
When the time data of the time counting circuit 27 matches the alarm time data, a signal is output from the match detection circuit 29 to the speaker drive circuit 34 and the speaker 35
generates an alarm sound. In addition, the display switching circuit 28 is supplied with timer time data of the timer circuit 33 as well as the above-mentioned time data and alarm time data, and the display switching circuit 28 selects these data based on the mode selection signal from the mode selection circuit 30. Select and change the date and time displayed on the LCD display 15.
Switch to three types: day of the week display, alarm display, and timer display. The mode selection circuit 30 selects one mode out of three modes by pulling out the digital clock section 3, and provides a mode selection signal to the display switching circuit 28 and the input control section 31.

The input control section 31 is supplied with a mode selection signal from the mode selection circuit 30, and also receives a push button switch.
Switch signals are given from S ₁ , S ₂ , and S ₃ respectively, and each function is set to a correction mode based on this switch signal, and the time counting circuit 27 , alarm time storage circuit 32 , and timer circuit 33
It outputs a digit select signal and a +1 set signal to each of the digit selection circuit 31a, selection gate circuit 31b, change detection circuit 31c, etc. to correct and set the information (data) displayed on the liquid crystal display device 15. It's summery. Control switch S ₁
When is pressed, it is applied to the one-shot circuit 31d, and a one-shot signal is output from the one-shot circuit 31d and inputted to the trigger terminal T of the flip-flop F via the OR gate 31e. Flip-flop F is normally in a reset state and outputs a signal from its output terminal to reset digit selection circuit 31a. When a signal is applied to the trigger terminal T and is set, the signal output is switched from the output terminal to the output terminal Q, and the digit selection circuit 31a is set.
At the same time, the signal from the output terminal Q causes the select gate circuit 31b to output a digit select signal based on the selected state of the digit select circuit 31a. Incidentally, when a signal is received again at the trigger terminal T of the flip-flop F, the output terminal Q is switched and reset. When the select switch _S2 is pressed, a one shot signal is sent from the one shot circuit 31f to the digit selection circuit 31.
given to a. As mentioned above, the digit selection circuit 31a is out of the reset state when the signal is output from the output terminal of the flip-flop F, and in this state, the select switch _S2 is pressed and the one shot signal is given from the one shot circuit 31f. Each time this one-shot signal arrives, the selected digit is sequentially shifted, and a different digit select signal is applied to the selection gate circuit 31b. Selection gate circuit 3
1b operates when a signal is applied from the output terminal Q of the flip-flop F, and the digit selection circuit 3 operates based on the mode selection signal selected by the mode selection circuit 30.
The digit select signal from 1a is sent to the time counting circuit 27,
This signal is applied to either the alarm time storage circuit 32 or the timer circuit 33, and is also applied to the display switching circuit 28 as a correction digit clarifying signal. As a result, among the display data displayed on the digital clock section 3, the corrected digit is selected and displayed blinking. The display data flashed in this manner is corrected by the set switch _S3 . That is, set switch _S3
When is pressed, “+” is output from the one shot circuit 31g.
1'' is applied to any one of the time counting circuit 27, alarm time storage circuit 32, and timer circuit 33, and the blinking correction digit is corrected. The change detection circuit 31c is supplied with three types of mode selection signals from the mode selection circuit 30, detects the change (change in function switching), and outputs a detection signal to the AND gate 31h. When this AND gate 31h receives the detection signal from the change detection circuit 31c and the signal from the output terminal Q of the flip-flop F, it gives a signal to the above-mentioned OR gate 31e, and from this OR gate 31e, a trigger signal is sent to the trigger terminal T of the flip-flop F. give. Therefore, the signal output terminal of flip-flop F is switched and the modified state is released. Therefore, when the input control section 31 is in the correction state where the control switch _S1 is pressed once, when the digital clock section 3 moves in and out and switches to another mode, the correction state is canceled. For example, as shown in Fig. 3, when the digital clock section 3 is pulled out one step and switched to the alarm mode while the month digit is blinking in the date/day mode and the alarm mode is set, the alarm time will be changed. The blinking display is canceled. Furthermore, even if the digital clock section 3 is pulled out one step and switched to alarm mode while the "day" digit is displayed blinking in the date/day mode, the blinking display of the alarm time will not be canceled. Ru. Similarly, when the mode is switched between alarm mode and timer mode, the modified state is canceled. In addition, the input control section 3
1 supplies a timer start signal to the timer circuit 33 to start the timer when the control switch _S1 is pressed and the flip-flop F is reset while the mode selection circuit 30 selects the timer mode. That is, when the control switch _S1 is pressed in the correction state of the timer mode, a one-shot signal is applied from the one-shot circuit 31d to the trigger terminal T of the flip-flop F via the OR gate 31e, and the flip-flop F is reset and outputs a signal. Since the terminal is switched to an output terminal and a signal is applied from the output terminal to the AND gate 31i to which the timer mode selection signal from the mode selection circuit 30 is applied, a start signal is applied to the timer circuit 33 from the AND gate 31i. This starts the timer.

[Operation of the embodiment] Next, a case where the electronic wristwatch configured as described above is used will be described.

Normally, the current time is indicated on the analog clock section 2 by the hand 9, and information on a predetermined mode is displayed on the liquid crystal display device 15 of the digital clock section 3. That is, when the digital watch section 3 is pushed into the digital storage section 4b of the watch case 4, each of the operators 21 of the mode changeover switch 21
a, 21b are turned off, this switch signal is given to the mode selection circuit 30, and the date/day of the week mode selection signal is given from the mode selection circuit 30 to the display switching circuit 28, which causes the digital clock section 3 to select the date/day of the week. mode is set. In this date/day of the week mode, the 1
Since the contents of the time counting circuit 27 that counts based on the Hz signal, that is, the time data, are selected by the display switching circuit 28, the liquid crystal display device of the digital clock section 3 is displayed as shown in FIG. 2A. The day of the week and date are displayed at 15. In such a date/day of the week mode, when correcting the date or day of the week, push button switches S ₁ , S ₂ , and S ₃ may be operated as appropriate. That is, when the control switch _S1 is pressed once, an ON signal is applied to the one-shot circuit 31d of the input control section 31, and a trigger signal is applied to the trigger terminal T of the flip-flop F via the OR gate 31e. Then, the reset signal that has been applied from the output terminal to the reset terminal of the digit selection circuit 31a is cut off, and instead, a signal is applied from the output terminal Q to the selection gate signal 31b, thereby entering the correction state. When select switch _S2 is pressed in this state, an ON signal is given to the one-shot circuit 31f, and a one-shot signal is given from the one-shot circuit 31f to the digit selection circuit 31a, which shifts the selected digit of the digit selection circuit 31a and selects the corrected digit. is changed. The modified digit select signal selected in this way is given to the selection gate circuit 31b, and this selection gate circuit 31b
The signal is applied to the time counting circuit 27 as a digit select signal, and is also applied to the display switching circuit 28 as a modified digit clarifying signal. As a result, the correction digit of the display data is displayed blinking on the liquid crystal display device 15 of the digital clock section 3. That is, as shown in FIG. 3, when the control switch _S1 is pressed, the month and date data are displayed on the liquid crystal display 15, and the month digit is displayed blinking, and when the select switch _S2 is pressed in this state, the month digit is displayed. Instead, the day digit is displayed blinking, and when select switch _S2 is pressed again, the display changes to the day of the week/date data and the day digit is displayed blinking.
Then, in this state, if you press the set switch S ₃ ,
A set signal of "+1" is applied from the one-shot circuit 31g to the time counting circuit 27, and the correction digits blinking on the liquid crystal display 15 are sequentially incremented by +1 and corrected. After the display data has been corrected in this way, if the control switch _S1 is pressed again, the flip-flop F is reset and the corrected state is canceled.

Furthermore, when the digital clock section 3 is pulled out one step, the digital clock section 3 enters the alarm mode. That is,
When the digital clock section 3 is pulled out one step, the operator 21a of the operators 21a and 21b of the mode changeover switch 21 is turned off and the operator 21b is turned on. An alarm mode selection signal is applied to 28, whereby alarm time data is displayed on the liquid crystal display device 15. When modifying or setting the alarm time data, as shown in Fig. 3, the alarm time can be adjusted by operating pushbutton switches S ₁ , S ₂ , and S ₃ as appropriate in the same way as in the date/day mode described above. The alarm time stored in the memory circuit 32 is corrected, and this corrected alarm time data is displayed on the liquid crystal display device 15 via the display switching circuit 28.
will be displayed. In this state, when the digital clock section 3 is pushed in, for example, by one step, the mode is switched to the date/day of the week mode, and the above-mentioned correction state is canceled. That is, when the mode is switched, the change detection circuit 31c detects the change, applies this detection signal to the AND gate 31h to which the signal from the output terminal Q of the flip-flop F is applied, and from this AND gate 31h, the OR gate 31e is applied. Since a trigger signal is applied to the flip-flop F via the circuit to reset it, the above-mentioned modified state is canceled.

Further, when the digital clock section 3 is pulled out two steps, the timer mode is entered. That is, when the digital clock part 3 is pulled out two steps, the operator 2 of the operators 21a and 21b of the mode changeover switch 21
1a is turned on and the operator 21b is turned off, so a timer mode selection signal is applied from the mode selection circuit 30 to the display switching circuit 28, thereby setting the timer mode. Even in this timer mode, if you want to modify or set the timer time information, press the push button switches S ₁ , S ₂ , S ₃ in the same way as in the date/day of the week mode described above, as shown in Figure 3.
By operating as described above, timer time information is set and displayed on the liquid crystal display device 15 via the display switching circuit 28. To start the timer mode, press the control switch _S1 again and reset the flip-flop F. That is, when the control switch _S1 is pressed, an on signal is input to the trigger terminal T of the flip-flop F via the one-shot circuit 31d and the OR gate 31e, and
The flip-flop F is reset to stop the output of the output terminal Q, and the output of the digit select signal from the selection gate circuit 31b is prohibited to cancel the modified state, and the AND gate 31i to which the timer mode selection signal is applied is A signal is given from the output terminal, and a start signal is given to the timer circuit 33 from this AND gate 31i. As a result, the frequency dividing circuit built in the timer circuit 33 divides the 100 Hz signal given from the frequency dividing circuit 25 to 1 Hz again and starts counting, and the ever-changing timer information (remaining time) is displayed on the switching circuit. It is displayed on the liquid crystal display device 15 via 28. When the remaining time reaches "0", a detection signal is given from the "0" detection circuit 36 to the speaker drive circuit 34, and the speaker 3
5 generates an alarm sound.

According to the electronic watch configured as described above, since the digital watch section 3 is retractably stored in the digital storage section 4b of the watch case 4, the display mode (clock face), external shape, design, etc. of the entire watch, etc. has changed, making it possible to offer electronic watches with a new image that has never existed before. In particular, the digital clock section 3
When the digital watch part 3 is stored in the digital storage part 4b of the watch case 4, a part of the digital watch part 3 is stored in the watch case 4.
Since the digital watch section 3 is only exposed through the lower right opening 4d, the exposed section of the digital watch section 3 when carried is small, and the combination watch can give off a luxurious look. Moreover, since the analog clock section 2 and the digital clock section 3 partially overlap, the entire clock can be configured compactly, and the display section of either one (in this embodiment, the analog clock section 2) can be made larger. can do. Furthermore, even if the digital clock section 3 is made multi-functional, the number of exposed switches is small, which prevents erroneous operation of the switches, and allows for a simple external shape. It can give a sense of luxury. Furthermore, the liquid crystal display device 15 of the digital clock section 3
Since the mode can be switched according to the withdrawal operation, it is possible to read the information of the mode according to the withdrawal state well and quickly, and even if the mode is switched in the correction state, the correction state is automatically changed. This also reduces the possibility of erroneous operations.

In addition, in the above-mentioned embodiment, the push button switches S ₁ , S ₂ ,
S ₃ was installed in the watch case 4, but the digital watch part 3
It may be provided in the case 13. Also push button switch
The digital clock section ₃ and the analog clock section 2 may be corrected only by the reuse 12 without providing S ₁ , S ₂ , and S 3 . That is, in this case, the reuse 12 can be pulled out in two steps, and when it is pulled out one step, the digital clock section 3 can be corrected, and when it is pulled out two steps, the analog clock section 2 can be corrected, and in particular, When pulled out one step, the switch corresponding to the above-mentioned control switch S ₁ is turned on, and in this state, when the reuse 12 is turned to the right, the switch corresponding to the above-mentioned select switch S ₂ is turned on, and when it is turned to the left again, the above-mentioned switch is turned on. The configuration may be such that a switch corresponding to the set switch _S3 is turned on, and the input control section is configured so that the switch corresponding to the set switch S3 is turned on.
It is only necessary to add a rising one-shot circuit, a falling one-shot circuit, and an AND gate as signal processing circuits for the switch that turns on when the reuse 12 is pulled out one step. That is, a rising one-shot circuit and a falling one-shot circuit are connected to the switch that is turned on when the reuse 12 is pulled out one step, and the output of the rising one-shot circuit is directly applied to the above-mentioned OR gate 31e, and the output of the falling one-shot circuit is as follows. flip flop F
The configuration may be such that the signal from the output terminal Q of is applied to the OR gate 31e via an AND gate which is input as a gate signal. Such an input control section also has the same functions and effects as those of the above-mentioned embodiment, and in particular, since one reuse 12 performs many switch functions, the number of switches can be extremely reduced.

Further, in the above-described embodiment, the digital clock section 3 with a built-in battery etc. was shown as an example of the structure of the digital display unit, but the digital display unit may be one in which a display device for digitally displaying data appears on the main body of the clock. However, it may be configured only with a display device.

Furthermore, this invention is not limited to the above-mentioned combination watch, but may also include both digital clock parts or three or more clock devices, and is not limited to wristwatches.
It can also be widely applied to other watches such as pendant watches.

[Effects of the invention] As explained above, according to the electronic timepiece according to the invention, various functions can be selected by moving the multifunctional digital display unit that is provided in the watch body so as to be able to appear and disappear. The digital display unit is set to a correction mode by a control switch provided in the digital display unit, and the information displayed on the digital display unit is corrected by the correction switch, and the control switch is operated again and the function is switched by the function selection means. Since the correction mode is canceled at the time, the number of switches exposed on the surface is small, preventing erroneous operation of the switches, and making it easy to switch each function of the digital display unit and to correct and set the display. It has the advantage of being able to

[Brief explanation of the drawing]

The figure shows an example in which this invention is applied to an electronic wristwatch.
Figure B is an AA cross-sectional view, Figure 1 C is a B-B cross-sectional view,
Figure 2 shows its usage condition, Figure 2A is an external plan view with the digital clock part stored, and Figure 2B
is a plan view of the main parts with the digital clock section pulled out one step, FIG. 2C is a plan view of the main parts with the digital clock section pulled out two steps, and FIG. FIG. 4 is a block diagram showing the circuit configuration, and FIG. 5 is a diagram showing the input control section. 1...Electronic watch, 2...Analog watch section, 3
...Digital clock section, 4...Watch case, 4a...
...Analog storage section, 4b...Digital storage section, 1
2...Reuse, 15...Liquid crystal display device, 21...
...Mode selection switch, 22...Push button switch,
22a...control switch, 22b...select switch, 22c...set switch, 27...time counting circuit, 31...input control section, 31a...digit selection circuit, 31b...selection gate circuit, 31c...
...Change detection circuit, 32...Alarm time storage circuit, 33...Timer circuit, F...Flip-flop.

Claims (1)

[Claims for Utility Model Registration] A watch case in which a dial is arranged on the top surface and a unit storage section is formed by opening the side surface, and an analog placed inside the watch case to move the hands on the dial. a clock section; a digital display unit that is removably housed in the unit storage section of the watch case and includes a digital display device that displays one of a plurality of functions on its top surface; and a first operation switch means. and storing the first operation of the first operation switch means and setting the information displayed on the digital display device of the digital display unit in a state where it can be modified, and operating the first operation switch means twice. a corrected state storage means that is cleared by a second operation to release the correctable state; and the corrected state storage means is set to a correctable state by the first operation of the first operation switch. At this time, a switch input is made by moving the digital display unit into and out of the unit storage section, clearing the correction state storage means and canceling the correctable state, and switching the displayed information to information of another function. An electronic clock comprising a second switch means.