JPS626555Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electronic timepiece, and particularly to correction of erroneous switch input.

The purpose of the present invention is to
Even if the first switch group is erroneously input, it provides a method for easily correcting it using an electronic circuit.

What is shown in FIG. 1 is a diagram showing a switch structure that operates by rotation and push/pull. Reference numeral 1 indicates a winding stem which is an external operating member that performs rotation and push/pull. When the winding stem 1 is rotated clockwise, the switch lever 2 is rotated around the pin 4 by the cam 10, and the spring portion of the switch lever 2 comes into contact with the switch pin 6.
At this time, the spring portion of the switch lever 2 is always in contact with the copper foil pattern 9 of the circuit board 3, and is connected to the positive terminal of the power supply. Conversely, when the winding stem 1 is rotated to the left, the spring portion of the switch lever 2 contacts the switch pin 7, and as explained above, the switch lever 2 is connected to the positive terminal of the power supply, so the switch pin 7 is connected to positive. Next, when the winding stem 1 is pulled out, the switch lever 2 moves from the click portion 11a to the 11b position as shown in FIG.
At this time, the tip of the spring portion of the switch lever 2 comes into contact with the copper foil 8 of the circuit board 3, and the switch is turned on.

The mechanism of the switch is as described above, but when this switch is employed, several problems arise. This will be explained below.

Now, suppose that a watch has functions other than a clock, such as a month/day display function, an alarm function, and a timer function, and the time can be corrected and each function can be corrected or set by adding and subtracting. As shown in Figure 1, when the winding stem 1 is pushed in and turned clockwise, the clock display changes to the month/day display, and when the winding stem 1 is then turned clockwise, the alarm display/timer display changes. In any display state, rotating the winding stem counterclockwise returns to the clock display. Next, when you pull out the winding stem 1, you can modify the display state before pulling it out. For example, if the month and day are displayed, turning the winding stem 1 to the right will add 1 day to the month and day, and rotating it to the left will add 1 day to the month and day. -1 day. As explained above, the state changes by operating the winding stem 1. For example,
When you pull out the winding stem 1 to correct the month and day, the winding stem may be pulled out while rotating. In other words, the switch lever 2 contacts the switch pin 6 before the switch lever 2 contacts the copper foil 8 shown in FIG. Then, even if you pull out the winding stem to correct the month and day, as explained earlier, it is the same as pulling out the winding stem after moving to the alarm display state, and it will enter the alarm correction state. Put it away. vice versa,
When you push in the winding stem after completing the correction of the month and date, the corrected month and day will be incremented by +1 or -1 day.

As explained above, if the winding stem 1 is not pushed or pulled immediately, the winding stem 1 will have to be opened and closed by other switches, making the product extremely difficult to use.

The present invention improves the above drawbacks by using an electronic circuit, and will be described in detail below with reference to the drawings.

FIG. 3 shows an embodiment of a correction circuit according to the present invention.

Switches 12, 13, and 14 correspond to switches 6, 7, and 8 in FIG. 1, respectively. Reference numeral 15 denotes a general anti-chattering circuit, which forms signals for each switch. 16 and 17 are differential circuits, 16 generates a differential signal when switches 12 and 13 are pressed, and 17 is a differential circuit that generates a differential signal when switches 12 and 13 are pressed.
4 generates differential signals when they touch and when they separate.

If the winding stem 1 is pulled out while rotating clockwise, switch 12 is turned on and then 14 switches are input. To explain the signal flow at that time, switch 1 of OR gate 19 is input.
The input on the 2 side becomes a logic level "1", a differential signal is output from the differentiating circuit 16, the output of the R-S type flip-flop 20 becomes a logic level "0", and the signal from the switch 12 becomes an input. indicates that something has been done. Here, and gates 29 and 30
The output signal outputted to the switch 14 is at a logic level "1" when the switch 14 is not inputted, and becomes a logic level "0" when the switch 14 is inputted. Since the switch 14 has not yet been inputted, the differential signal of the switch 12 output from the AND-OR gate 33 can pass through the AND gate 30 and is input to the 2-bit mode counters 27, 2.
8 clock, and the display mode moves by one. (The mode counter is a circuit for determining the four display states described above, and uses this 2-bit output to select a display signal and obtain an arbitrary display state.) At this time, the differential signal of the same switch 12 is input as the clock of the mode counter memories 25 and 26, and the clock signal is inverted from the clock signal of the mode counters 27 and 28, and the clock signal is inverted from the clock signal of the mode counter 27 and 28. state, i.e. switch 1
The outputs of mode counters 27 and 28, which determine the original table state before 2 is input, are written to mode counter memories 25 and 26, respectively. At the same time, the measurement circuit 18 is reset and measurement begins. This measurement circuit 18 is 125m
Assuming that the measurement circuit measures sec to 250 msec, its output becomes logic level "1" when reset, and becomes logic level "0" after 125 msec to 250 msec has elapsed. Therefore, when the winding stem is pulled out and the switch 14 is input within 125 to 250 msec after the switch 12 is input, the signal of the switch 14 is differentiated by the differentiating circuit 17, and this differentiated signal is processed by the AND gate. 21, controls the select gates 31 and 32, and selects the mode counter memories 25 and 26 to be input data to the mode counters 27 and 28. The signal applied to the input of the AND gate 22 is a periodic signal such as 22s shown in FIG. 4, and the differential signal 17s of the switch 14 has a timing as shown in FIG. , one pulse signal is output from the AND gate 22 and inputted to the AND gate 30 through the AND OR gate 33. Here, the other input of the AND gate 30 is pulled out by a signal corresponding to the on/off state of the switch 14, and since the logic level is "1" when the switch 14 is on, the mode counters 27 and 28 are The data inputted as a write clock and written in the mode counter memory is written to the mode counters 27 and 28. As a result, when you pull out winding stem 1, you may accidentally turn on switch 12.
Alternatively, even when 13 is input, the original display state can be restored. 125m sec~250m sec
If the winding stem 1 is pulled out after the above period has elapsed, it is a normal operation, and the output of the measuring circuit 18 becomes logic level "0" and the signal is inhibited, so the mode counters 27 and 28 return to their original state. No undoing action is performed. Conversely, when the AND gate 29 is rotated counterclockwise and the winding stem 1 is pulled out,
Since the operation is similar, the explanation will be omitted. Next, we will explain the correcting operation when the winding stem 1 is pushed in while rotating while the winding stem 1 is being pulled out. Considering the case where the winding stem 1 is pushed in while rotating counterclockwise, the switch 13 is first input, and as in the previous explanation, a differential pulse is output from the differentiating circuit 16, the measuring circuit 18 is reset, and the output is at the logic level " 1”. At this time, the output of the R-S type flip-flop 20 becomes a logic level "1", indicating that the switch 13 has been input. When the winding stem 1 is pushed in within 125 m sec to 250 m sec, a differential pulse is output from the differentiating circuit 17, passes through the AND gate 21, is added to the input of the EX.OR gate 23, and the differential signal of the switch 14 is output. During the period when is being output, switches 12 and 13
The output signal of the R-S type flip-flop 20 indicating which one is being input is
It is inverted by the EX/OR gate 23, and in this case, since the switch 13 is input, the logic level "1" of the output of the R-S type flip-flop 20 is input to the EX/OR gate 23. The OR gate 23 outputs a logic level "0", and during that period, the AND gate 22 outputs one pulse as described above, and the OR gate 24 outputs a correction pulse that becomes a correction signal for each counter. In other words, as explained above, when the winding stem 1 is rotated clockwise or counterclockwise, an undesired correction such as addition or subtraction is performed in each counter. When making corrections, it is sufficient to perform subtraction after addition, and addition after subtraction. Therefore, in the circuit shown in Figure 3, the 23s signal is used as the signal for selecting addition or subtraction, and the 24s signal is used as the signal for selecting addition or subtraction, and the 24s signal is used for each counter (second, minute, and hour counters for the clock, month and day counters for the month and day displays, and alarms). It may be used as a correction signal for a setting counter (setting counter, timer counter). If the winding stem 1 is pushed in after 125 to 250 m sec has passed, the measuring circuit 18
Since the output becomes logic level "0", no correction signal is output.

As explained above, before pushing and pulling the winding stem 1,
This was the case when a rotational operation was performed, but the following describes a case in which a rotational operation is performed after the winding stem 1 is pushed or pulled.

Reference numeral 34 shown in FIG. 3 is the same measuring circuit as 18, but the measuring circuit 34 is reset by the differential signal output from the differentiating circuit 17 when the winding stem 1 is pushed or pulled. The output of the measurement circuit 34 becomes a logic level "0" and is applied to the AND gate 35. Then, after 0.25 to 0.5 msec, the output of the measuring circuit 34 becomes logic level "1". In other words, within 0.25 to 0.5 m sec after the winding stem 1 is pushed or pulled, switch input for rotation operation is prohibited, and input due to erroneous operation is not accepted.

As explained above, if the present invention is used, it will be possible to solve problems caused by operating the winding stem, which is an external operating member, even if unnecessary rotational operations are performed before and after pushing and pulling the winding stem. This problem can actually be solved by automatically returning to the original state in which no rotational operation was performed.

[Brief explanation of the drawing]

Figure 1: A plan view of the switch structure, Figure 2: A plan view of the winding stem shown in Figure 1 with it pulled out, Figure 3: A circuit diagram of the measuring circuit and correction circuit according to the present invention, Figure 4.
Figure: Timing chart of the circuit diagram in Figure 3. 1... winding stem, 2... switch lever, 3... circuit board, 4... pin, 5... pin, 6... switch pin, 7... switch pin, 8... copper foil, 9...
...Copper foil, 10...Cam, 11...Click part, 1
2, 13, 14... switch, 15... chattering prevention circuit, 16, 17... differential circuit, 18...
...Measurement circuit, 19...OR gate, 20...R-
S type flip flop, 21...AND
Gate, 22...AND gate, 23...EX.-
OR gate, 24...OR gate, 25, 26...
Memory for mode counter, 27, 28...Mode counter, 29...AND gate, 30...
...AND gate, 31...Select gate, 32
...Select gate, 33...AND-OR gate, 34...Measurement circuit, 35...AND gate.

Claims (1)

[Scope of utility model registration request] The first part is opened and closed by rotating the external operating member.
A measuring circuit for measuring the time from the operation of the first switch to the operation of the second switch in an electronic watch having a switch and a second switch opened and closed by pushing and pulling the same external operating member. a mode counter that is controlled by the operation of the first switch; a mode counter memory that stores the value of the mode counter immediately before the first switch is operated; and a mode counter that is controlled by the operation of the first switch; further comprising a correction circuit that writes and corrects the value stored in the mode counter memory to the mode counter when the time from the operation of the first switch to the operation of the second switch is less than or equal to a predetermined value. An electronic clock featuring