DE2824990A1 - ELECTRONIC CLOCK WITH MECHANICAL DISPLAY - Google Patents

Abstract

An electronic watch with mechanical display is more easily altered or corrected by sharing the display driving tests among a plurality of duel rotation sense motors. Such an arrangement enables practicable obtaining of a perpetual calendar in such a watch. A first stepping motor drives the seconds and minutes displays Figure 1, and the second stepping motor drives the hours and calendar display. Drive signals for the motors are derived by respective frequency dividers from a crystal controlled oscillator. When setting, a selector 8 is operated to select the unit to be corrected and in response to operation of a switch 9 or 10 the appropriate motor is driven forward or backward at a slow or fast rate. Memory circuits enable automatic adjustment for the number of days in the current month. <IMAGE>

Description

Electronic clock with mechanical display

The present invention relates to an electronic watch with mechanical display, with a piezoelectric resonator and a frequency divider according to the preamble of the patent claim 1.

The object of the invention is to improve such a clock to the effect / that with a simple and easy to use Device a correction of the displayed values is possible.

Dje solution to this problem is carried out according to the invention with the im characterizing part of claim 1 specified features. Advantageous embodiments are described in the subclaims .

The invention is explained in more detail below with reference to the drawing, in which a preferred embodiment is shown is. Show it

FIG. 1 is a plan view of an electronic wrist watch;

Figure 2 is an enlarged view of a section through the drive of this clock and

Figure 3 is a block diagram of the electrical circuit of this clock.

The electronic watch shown in the drawing has a

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Dial 1 on, as well as an hour hand 2, a minute hand 3 and a second hand 4. The dial is provided with a window 5 in which a date 6 appears, which is arranged on a turntable 7.

The operating parts for correcting the various clock values have an adjustable rotary knob 8 and two buttons 9 and 10 on.

The second hand 4 is attached to an axle 11 which is firmly connected to a gear 12 on which a wheel 13 is arranged which meshes with a gear 14 which is arranged on the axis 15 of a first motor designated 16. That Gear 12 is in engagement with a wheel 17 with a Gear 18 is firmly connected, which in turn is in engagement with a wheel 19 on which the minute hand 3 via a hollow axle 19a is attached. So the minute hand will too driven by the motor 16.

The hour hand 2 is located on a wheel 20 provided with a hollow axle, which is driven by a plurality of gears designated in their entirety with, namely via a gear 22 which is arranged on the axis 23 of a second motor designated 24. The hour wheel 20 is provided with a wheel 48 which drives a wheel 49 which is used once every 48 hours to control the ring 7 with the date display by means of a pin 27. The ring 7 and the hour hand 2 are therefore driven by the motor 24 .

The two motors 16 and 24 are designed such that they can rotate in both directions of rotation. The key 9, which is provided with a "+" sign, enables its manual

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Actuation in the forward direction of the pointer driven by it while the key 10 is marked with a "-" sign is provided, enables manual control of the pointer driven by them in the direction of their return. Which of the two motors 16 or 24 is operated by the two buttons 9 or 10 depends on the position of the adjustable Turning knob 8. The latter is provided with a slot 25 so that it can be adjusted with a fingernail, for example as well as with a marker 26 to indicate the selected position with respect to fixed markings "0", "M", "s", "H" and "Q", which are arranged on the watch case. If the marking 26 is opposite the "O" position, it is the button 8 in its neutral position and pressing the buttons 9 and 10 has no effect. Is the Marking 26 opposite the display "M" causes actuation one of the two buttons 9 or 10 a fast run of the motor 16 in one of its two directions and thus one Rapid adjustment of the minute hand 3, which takes place as long as the corresponding button is pressed. Is the Marking 26 opposite the display "S", each actuation of the button 9 causes the motor 16 to move the second hand 4 advances by one second, while pressing button 10 moves the second hand 4 back by one second. Located If the marking 26 is opposite the display "H", each actuation of one of the keys 9 or 10 causes the Motor 24 adjusts the hour hand 2 by one hour in one of its two directions of rotation. The marker is located 26 opposite the display “Q”, pressing one of the two keys 9 or 10 causes the motor 24 to run rapidly in one of its two directions of rotation and consequently a quick adjustment of the hour hand 2, as long as the corresponding one Button is pressed. The date display will be 7

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at everyone. If the hour hand 2 is rotated corresponding to 24 hours, it is adjusted by one value.

Due to the fact that the drive is the minute and second hands on the one hand and the hour hand and the date display on the other hand is separated, so it is with the invention Clock possible to achieve a slight correction of the various values displayed. If the wearer of the watch is so If he travels from one time zone to another, he can simply turn the hour hand 2 by operating the motor 24 while the date display is only changed when it is actually necessary.

It should be noted that by providing additional counters in the control circuit a perpetual calendar can easily be obtained from the watch, with a necessary correction of the date display every month end.

This case is included in the circuit shown in FIG. 3, which also takes the leap years into account. There this circuit is only one embodiment of the many possibilities to carry out the various functions, it is only briefly described below.

The circuit has a quartz oscillator 27, which is followed by a divider 28 with two outputs, one of which one output 28a for 1: "- Hz and the other 28b for 32 Hz is. The 1 Hz pulses are transmitted via a correction circuit for the seconds and a forming circuit 30 (for the duration and the polarity) fed to the motor 16, which controls the minute hand and drives the second hand 4. The same 1 Hz pulses are also fed to two dividers 31 and 32, which divide them to one Bring frequency of 1/720 Hz, after which they have a forming circuit 33 and a locking circuit for the direction of rotation 34 the

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Motor 24 are supplied, which drives the hour hand 2 and the date display 7.

The correction of the hour hand 2 when changing the time zone must now, as already mentioned, be advanced or reset to allow one or more whole hours.

For each hour to be advanced or reset, a five-digit counter 35 carries a sequence of five high-frequency pulses to the forming circuit 33, the motor 24 executing five steps to advance hand 2 by one hour. The twelve counter 36 and the two counter 37 together deliver within of 24 hours a pulse to a day counter 38. A mechanical command to reset to zero is given by a with 39 marked breaker given to the 12-hour wheel to ensure synchronization with the day change every 24 hours.

The day counter 38 counts continuously to 31 and must also mechanically with the date display 7 once per complete Rotation can be synchronized. For every complete counting cycle of 31, it sends a pulse to a monthly counter

The month counter 40 counts to 12. As the position of the monk counter is usually not visible, it is necessary when changing the battery its exact position by means of a Set breaker 41, both the counter 40 and an additional part 42 for displaying the count pulses feeds.

A year counter 43 counts up to four in order to take leap years into account. Since the position of this counter cannot be read from the watch carrier either, it is

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change necessary adjust the counter again by means of a 4% breaker, which is attached to both the counter 43 and an additional part 45 pulses to display the count.

Finally, a day-month comparison circle compares 46 the position of the day counter 38 with the position of the month counter 40 and the year counter 43. If the day counter reaches a prohibited position, for example the 31st day for one Month with 30 days, it generates a series of pulses at 32 Hz, which set the motor 24 in rapid rotation and which Move the date display 7 forward to the next permissible position, i.e. up to the 1st of the following month. One of the Date display 7 actuated sensor 47 ensures correct control.

During this correction, those of the divider chain are made originating impulses are also taken into account, so that the exact hour display is retained during the correction.

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Claims (8)

Claims f / T \ Electronic clock with mechanical display with a piezoelectric resonator, a frequency divider, at least two "bidirectional" rotating motors controlled by the frequency divider, one for driving the minutes and seconds indicators and the other for driving the hour indicators , as well as an additional display device, and with a control device which has at least one manually operable control part to rotate the two motors separately in one or the other direction, characterized in that the clock additionally has a selection device which determines which of the two motors is switched on when the control unit is actuated. 2. Clock according to claim 1, characterized in that the control device has two control parts to rotate one or the other motor in one or the other direction accordingly. 809885/0664 ORIGINAL INSPECTED " ² " 282A990 3. Clock according to claim 1, characterized in / that the selection device is designed in such a way that it can take five positions, namely one position of rest, one position for changing the hour display device, one position for changing the minute display device, one position for changing the seconds display device and a position for changing the additional display device. 4. Clock according to claim 3, characterized in that the associated The circuit is designed such that when the selection device of the control device that position assumes, in which the control parts act on the second display device, each actuation of one of the two control parts the first motor turns on at the second indicator ii of the corresponding direction for one second to adjust. 5. Clock according to claim 4, characterized in that the circuit is designed such that when the selection device of the control device assumes the position in which the control parts act on the minute display device, each actuation of one of the two control parts the first The motor switches on in order to adjust the minute display device in the corresponding direction as quickly as possible the control unit is operated. 6. Clock according to claim 4, characterized in that the circuit is designed such that when the selection device of the control device assumes the position in which the control parts act on the hour display device, each actuation of one of the two control parts the second The engine turns on at the hour indicator in the 809885/0664 to adjust the corresponding direction by one hour. 7. Clock according to claim 1, characterized in that the additional display device driven by the second motor is a calendar and that an electronic control circuit is provided for the second motor, with a memory to correct the calendar display device at the end of those months when a correction is necessary. 8. Clock according to claim 7, characterized in that the circuit is designed such that when the selection device the control device assumes the position in which the control parts on the calendar display device act, the actuation of one of the two control parts switches on the second motor to the hour display device to be adjusted quickly in the corresponding direction as long as the corresponding control module is operated is and that the calendar display device is adjusted by one step when the hour display device is one Rotation every 24 hours. 809885/0664