JPS6352726B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary switch for an electronic timepiece that generates a correction signal for correcting the time, calendar, alarm functions, etc. of a digital electronic timepiece.

Conventionally, when setting the alarm time on a digital electronic clock, the function is selected using the function selection switch, the correction digit is selected using the correction digit selection switch, and the alarm time is set using the setting switch. A method was being adopted.

In the above set method, it is necessary to select the correction digit for each individual digit, and the selected correction digit is set by pressing the set button many times, so the operation is complicated and long. This required setup time, making it difficult to modify alarms, etc.

In order to eliminate this drawback, a device has been proposed in which a switch device is provided that generates a large number of correction signals at high speed by rotating the reuse, thereby eliminating the need for selecting a correction digit. Conventional switches are difficult to operate because there is no continuous proportional relationship between the rotational speed of the crown and the speed at which the correction signal is generated. .

Based on these facts, the present invention generates a correction signal at a speed proportional to the rotational speed of the reuse, and
It is an object of the present invention to provide a rotary switch that can maintain switching stability and reliability even when the reuse rotates at high speed.

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

FIG. 1 is an external view of a digital electronic watch to which the present invention is applied, where 20 is a digital electronic watch, 7 is a digital display device, and 20b is a function selection button that switches and displays time, calendar, and alarm contents by operating the button. . 20c is reused, and in the pressed N position, the function selection button 2 is pressed.
Normally displays the contents of the function selected by 0b,
No correction is made by rotating the reuse 20c. When the reuse 20c is pulled out one step to the M position, the function selected by the function selection button 20b is corrected or set, and by rotating the reuse 20c forward or backward, the switch according to the present invention is activated and the count-up is started. Or a down correction or set is made.

The switch will be explained in detail below.
Referring to Figures 2 and 3, Reuse 20c
The switch wheel 30, which rotates at a speed proportional to the rotational speed of the switch wheel 30, is rotatably supported between the switch receiver 31 and the clock base plate 32 by the locking stones 33 and 34. The switch transmission wheel 35 is engaged with the pinion 36 of the switch wheel 30, and receives the rotational movement of the reuse 20c from a normal clock gear train (not shown), increases its speed, and transmits it to the switch wheel 30. . A plastic switch insulating seat 37 is engaged with the pinion 36 of the switch wheel 30, and a movable switch plate 38 is press-fitted coaxially therewith.
As shown in FIGS. 4 and 5, the switch insulating seat 37 has a cylindrical portion 37a having an arc-shaped outer peripheral surface concentric with the axis of the switch wheel 30.
The two cut holes 37b and 37c provided in the
Two movable contacts provided on the movable switch plate 38
S ₄ and S ₅ are engaged, and the length from the central axis of the switch wheel 30 to the tip of the movable contact S ₄ or S ₅ is approximately the same as the radius of the outer circumference of the cylindrical portion 37a of the switch insulating seat 37. or slightly longer.

On the other hand, three switch springs 39 with the same shape
are clamped and fixed to the slit portions of the switch spring shaft 40, respectively. As shown in FIG.
The switch is inserted into the three positioning holes 42 provided in the switch 1 and brought into contact with the side edge 42a of the positioning holes 42 near the center of the switch axle. These three positioning holes 42 are arranged so that the distances from the center of the switch wheel are the same, and therefore the three switch springs 39 are also arranged at the same distance from the center of the switch wheel. When the switch wheel 30 is installed in the
S ₁ , S ₂ , and S ₃ can be evenly brought into contact with the side surface of the cylindrical portion 37a of the switch insulating seat 37 or the movable contacts S ₄ and S ₅ with respective set contact pressures.
Each of the switch springs 39 is connected to a control circuit (not shown) and is adapted to transmit a correction signal. Note that the pressing spring 43 is a movable contact.
This ensures that S ₄ and S ₅ are at the same potential as the battery electrode.

Next, to explain the operation, Reuse 20c
When pulled out to the M position shown in Figure 1 and rotated twice,
The rotation is transmitted from the switch transmission wheel 35 to the switch wheel 30 via the switch pinion 36 at increased speed,
The switch insulating seat 37, the movable switch plate 38, and the movable contacts S ₄ and S ₅ rotate at high speed. Due to this rotation, the movable contacts S ₄ and S ₅ exposed from the cutouts 37b and 37c of the switch insulating seat 37 are replaced by the fixed contacts S ₁ and
Contact S ₂ and S ₃ in sequence to close the respective contacts. At this time, there are two movable contacts and three fixed contact pieces, which do not have a common divisor and are arranged so that the two sets of contacts do not close at the same time but close one after another. Also, when the reuse is rotated in the normal direction, the contacts S ₁ ,
They close in the order of S ₂ and S ₃ , and when reversed, they close in the opposite order. Therefore, after detecting the order in which the signals from the switches are sent, the control circuit can generate correction signals in the forward and reverse directions, respectively. Since the correction signal is generated in proportion to the rotational speed of the reuse, correction can be easily performed by adjusting the reuse rotational speed as appropriate depending on the length of time to be corrected.
Furthermore, since there are two movable contacts and three fixed contacts, the number of correction signals generated per one rotation of the switch wheel is six, and a large number of signals can be generated to shorten the correction time.

The pressure at which the fixed contact contacts the movable contact can be set accurately and to the minimum necessary value.
Moreover, the fixed contact is the cylindrical part 37 of the switch insulating seat 37.
The amount of displacement between the state of contacting the side surface of a and the state of contacting the movable contact can be minimized, and the contact can be opened and closed reliably even when the reuse rotates at high speed. .

Next, an example of a circuit that performs corrective action in response to a signal from a rotary switch will be explained. FIG. 7 is a circuit block diagram of a digital electronic watch that receives a signal from the rotary switch, and FIG. 7 is a main voltage waveform diagram in the circuit block diagram of FIG. 2 is a crystal oscillator, 3 is a frequency divider circuit, which inputs the signal from the crystal oscillator 2 and outputs 1Hz and 2KHz.
Outputs a frequency-divided signal. Reference numeral 4 denotes a clock counter, which is composed of an up-down counter, receives the 1 Hz frequency divided signal from the frequency dividing circuit 3 as input, performs a timekeeping operation, and outputs timekeeping information of hours, minutes, and seconds. Reference numeral 5 denotes a calendar counter, which is composed of an up-down counter, and counts by the carry signal of the time counter 4 to indicate the year,
Outputs month, day, and calendar information. Reference numeral 21 denotes an alarm memory circuit, which has an up-down counter configuration and outputs hour, minute, and second alarm information, and also detects coincidence with the time counter 4 by an alarm matching circuit 22 and activates an acoustic drive circuit 24. The audio device 25 outputs notification sound via the audio device 25.

Reference numeral 23 denotes a function selection circuit, which is composed of a three-stage shift register, and when the function selection button 20b is operated, a function selection switch 20e is operated, and the time function, calendar function, and alarm function are selected from the function selection circuit 23. , TK, CA, respectively.
AL function selection signal is output.

Function selection signal from the function selection circuit 23
The time counter 4, calendar counter 5, and alarm memory circuit 21 are provided by TK, CA, and AL.
The information is selectively displayed on the display device 7 by the display switching circuit 6, and the time counter 4, calendar counter 5, and alarm memory circuit 21 can be selectively modified or set.

8 is a chattering prevention circuit, and latch circuits 8a, 8d, 8e are provided corresponding to the fixed contacts S ₁ , S ₂ , S ₃ of the three switch springs 39. The latch circuit 8a is composed of a set-reset flip-flop 8c and an OR gate 8b.The set terminal of the set-reset flip-flop 8a is connected to the fixed contact _S1 , and the reset terminal is connected to the fixed contact S1. ₂ and _S3 are connected via an OR gate 8b.

The latch circuits 8d and 8e have the same configuration as the latch circuit 8a, and the set terminal of the latch circuit 8d is connected to the fixed contact _S2 , and the reset terminal is connected to the fixed contacts _S1 and _S3 via an OR gate. has been done. Also, the set terminal of the latch circuit 8e is a fixed contact.
S ₃ and the reset terminal is connected to fixed contacts S ₁ and S ₂ .
Connected through an OR gate.

Next, the operation of the chattering prevention circuit 8 will be explained.

When the switch wheel 30 is rotated clockwise, the movable contacts S ₄ and S ₅ of the switch wheel 30 come into contact with the fixed contacts S ₁ , S ₂ , and S ₃ in the order of S ₁ , S ₂ , and S ₃ . “H”
Outputs a level contact signal.

However, in the initial state, the fixed contact S ₁
is in contact with the movable contact _S4 and outputs a contact signal of the "H" level, the reset flip-flop 8c of the latch circuit 8a is set and the latch signal A outputs a signal of the "H" level. At the same time, the latch circuits 8d and 8e are reset, and their respective latch signals B and C become "L" level.

Then, as the switch wheel 30 is rotated, in the next state, the contact signals from the fixed contacts S ₁ , S ₂ , and S ₃ are all open, but the contact signals from the latch circuits 8 a , 8 d , and 8 e are all open. The latch signal maintains its previous level.

When the switch wheel 30 is further rotated, the contact signal of the fixed contact _S2 becomes "H" level, the latch circuit 8d is set, the latch signal B becomes "H" level, and the latch circuits 8a and 8e are reset. Therefore, the latch signal A of the latch circuit 8a changes from the "H" level to the "L" level.

When the switch wheel 30 is further rotated, the contact signals from the fixed contacts S ₁ , S ₂ , S ₃ are all opened again, but the latch circuits 8a, 8d, 8e
The latch signals A, B, and C maintain their previous levels. Then, as the switch wheel 30 further rotates, the contact signal of the fixed contact _S3 becomes "H" level, and the latch signal C from the latch circuit 8e is output.
is set to the "H" level, the latch circuits 8a and 8d are reset, and the latch signals A and B are reset.
becomes “L” level.

Further, the switch wheel 30 is rotated to close the fixed contact.
When the contact signal of _S1 goes to the "H" level, the latch circuit 8a is set, and the latch signal A goes from the "L" level to the "H" level and the latch circuit 8a is set.
d and 8e are reset, and latch signals B and C are brought to the "L" level.

As mentioned above, the chattering prevention circuit 8
By providing the latch circuits _8a , 8d, 8e corresponding to the fixed contacts S1, _S2 , _S3 of the switch springs 39, the latch circuit corresponding to the contact signal is set by the only contact signal from the fixed contact, It has the function of resetting other latch circuits, maintaining the state until the next contact signal arrives, and at the same time preventing chattering.

The contact signals S ₁ , S ₂ , and S ₃ have voltage waveforms shown in FIG. 8 A, B, and C, and the latch signals A, B, and C from the latch circuit 8 have voltage waveforms shown in FIG. It is shown.

20d is a correction mode switch provided corresponding to the reuse 20c; 9, 10, 11 are
is an AND gate, and the latch signals A, B, C
is input and the modification mode switch 20d sets the state to a modification possible state.

With the above configuration, the reuse 20c is normally in the N position, so the correction mode switch 20
d is in the OFF state, and the switch signal is at the "L" level. Therefore, the AND gates 9, 10, 11
is closed and latch signals A, B, and C are not output. Therefore, in this state, the reuse 20c
No correction or set operation will be performed even if turned.

Next, when the reuse 20c is pulled one step to the M position, the correction mode switch 20d is turned on and the switch signal becomes "H", and the AND gates 9, 10, 11 are opened and the latch signals A, B, C are turned on.
It becomes a state where it can be modified by outputting .

12 is a pulsing circuit, and the reuse 20
c, a first D-type flip-flop 12a which takes as a data input the latch signal A generated by the chattering prevention circuit 8 in conjunction with the operation, and takes the 2KHz divided signal from the frequency divider circuit 3 as a clock input;
and a second D-type flip-flop 12b, which has the Q output of the flip-flop 12a as its data input and a signal obtained by inverting the 2KHz frequency-divided signal via an inverter 19 as its clock input;
The Q output of the second D-type flip-flop 12b and the first D-type flip-flop 12a
Outputs a pulse signal D using the output of
It consists of a NOR gate 12c. 13,
14 also has the same configuration as the above-mentioned pulsing circuit 12, is provided corresponding to the latch signals B and C from the above-mentioned chattering prevention circuit 8, and outputs pulse signals E and F, respectively.

The operation of the pulsing circuit 12 is performed when the latch signal A input through the AND gate 9 is "H".
When the level is reached, the data input of the first flip-flop 12a of the pulse generator 12 is set, and the Q of the first flip-flop 12a is set in synchronization with the first fall of the 2KHz signal from the frequency divider circuit 3.
The output becomes "H" level and the data input of the second flip-flop 12b is set. Then, in synchronization with the first fall of the 2KHz signal inputted from the frequency divider circuit 3 via the inverter 19, the Q output of the second flip-flop 12b becomes "H".
be leveled. The time period from when the output of the first flip-flop 12a changes to the "L" level through the above operation until the Q output of the second flip-flop 12b changes to the "H" level, that is, a half period of the clock signal 2KHz. The width pulse signal D is output to the output terminal of the OR gate 12c.

Similarly to the above, each time the latch signals B and C from the chattering prevention circuit 8 are input from the pulsing circuits 13 and 14, the latching signals from the frequency dividing circuit 3 are inputted.
Pulse signals E and F for half a period of the 2KHz signal synchronized with the 2KHz signal are output.

The pulsing circuits 12, 13, and 14 and the chattering prevention circuit 8 constitute a waveform shaping circuit that eliminates chattering of the contact signal caused by the rotary switch 30 and generates a synchronizing pulse.

Reference numeral 15 denotes a direction detection circuit, which is composed of three reset flip-flops (hereinafter abbreviated as RS-FF) 16, 17, and 18 provided corresponding to the pulse generators 12, 13, and 14. There is.

The pulse signal D from the pulse generator 12 is input to the set terminal of the RS-FF 16, the pulse signal F from the pulse generator 14 is input to the reset terminal, and the output signal is input to the output terminal Q ₁₆ . The signal P ₁₆ is output, and the output signal ₁₆ is output to the inverting output terminal ₁₆ .

Further, the pulse signal E from the pulse generator 13 is input to the set terminal of RS-FF17, the pulse signal D from the pulse generator 12 is input to the reset terminal, and the output signal is input to the output terminal _Q17 . P ₁₇ is output, and an output signal ₁₇ is output to the inverting output terminal ₁₇ . Furthermore, the pulse signal F from the pulse generator 14 is input to the set terminal of the RS-FF 18, the pulse signal E from the pulse generator 13 is input to the reset terminal, and the output signal P is input to the output terminal _Q13 . ₁₈ is output, and the output signal ₁₈ is output to the inverting output terminal ₁₈ .

26 is the first modified signal gate group, consisting of three
It is composed of AND gates 26a, 26b, 26c and an OR gate 26d. Also, AND gate 2
One input terminal of 6a, 26b, 26c is connected to the output terminal Q ₁₆ of the RS-FF 16, 17, 18, respectively.
Q ₁₇ and Q ₁₈ are connected, and the output terminals from the pulse generators 13, 14, and 12 are connected to the other input terminal, and the output terminals of the AND gates 26a, 26b, and 26c are connected to each other. By connecting the terminal to the input terminal of OR gate 26d,
An addition correction signal X is output from the output terminal of the OR gate 26d.

27 is a second modified signal gate group, consisting of three
It is composed of AND gates 27a, 27b, 27c and an OR gate 27d. One input terminal of each AND gate 27a, 27b, 27c is connected to the inverted output terminals ₁₆ , 17, 18 from the RS-FF 16, ₁₇ , _18, respectively, and the other input terminal is connected to the pulse generator 13, respectively. 14 and 12 are connected, and each output terminal of AND gates 27a, 27b, and 27c is connected to the OR gate.
By being connected to the input terminal of the gate 27d
A subtraction correction signal Y is output from the output terminal of the OR gate 26d.

Next, the operation of the correction signal generating device in the above configuration will be explained. As an initial condition, RS-FF16 is reset, RS-FF17 and 18 are in set state,
When the reuse 20c is rotated in the forward direction in this state, the pulse signals D, E,
F are output in order, the RS-FF 16 is set by the pulse signal D that comes first, and the output terminal Q ₁₆ outputs an output signal P ₁₆ of "H" level, and the AND of the first correction signal gate group 26 is output. While opening the gate 26a, the signal passes through the AND gate 26c which was opened by the output signal _P18 of the RS-FF18.
An addition correction signal X is output from the output terminal of the OR gate 26d.

Also, at this time, the pulse signal D causes the RS-FF1
7 is set and an "H" level signal ₁₇ is output from the inverted output terminal ₁₇ , opening the AND gate 27b of the second correction gate group 27, but the corresponding pulse signal F is not output and subtraction is performed. Correction signal Y is not output.

Next, when the pulse signal E is output, the
RS-FF17 is set and output terminal _Q17 goes “H”
The level output signal P ₁₇ is output, opens the AND gate 26b of the first correction signal gate group 26, and passes through the AND gate 26a which was opened by the output signal P ₁₆ of the RS-FF 16. An addition correction signal X is output from the output terminal of the OR gate 26d. Furthermore, at this time, the RS-FF 18 is reset by the pulse signal E. The RS
- By resetting the FF 18, an "H" level output signal ₁₈ is output to the inverted output terminal ₁₈ , and the second AND gate 27c is opened, but since the corresponding pulse signal D does not come, the subtraction correction signal Y is output.
is not output.

Next, when the pulse signal F comes, the RS-FF18
is set, an output signal _P18 of "H" level is outputted from the output terminal _Q18 , the AND gate 26c of the first correction signal gate group 26 is opened, and the RS-
Opened by FF17 output signal _P16
The addition correction signal X is output from the output terminal of the OR gate 26d through the AND gate 26b. Also, at this time, the RS-FF 16 is reset by the pulse signal F, and outputs the inverted output signal ₁₆ at the "H" level, and the AND gate 27a of the second correction signal gate group 27
However, since the corresponding pulse signal E does not arrive, the subtraction correction signal Y is not output.

While the reuse 20c continues to rotate normally as described above, the pulse signals D, E, and F are selected by the direction detection circuit 15 and the first correction signal gate group 26, and are continuously output as the addition correction signal X. is output to.

Next, RS-FF17 and 18 are reset, RS-FF
16 is set, the reuse 20c
When reversed, the pulsing circuits 12, 13,
The pulse signals from 14 are output in the order of F, E, and D. Then, the pulse signal F that comes first causes the above-mentioned
The RS-FF 18 is set and an output signal P ₁₈ of H'' level is output from the output terminal Q ₁₈ to open the AND gate 26c of the first correction signal gate group 26, and is also opened by the inverted output signal ₁₇ of the RS-FF 17. The subtraction correction signal Y is outputted from the output terminal of the OR gate 27d through the AND gate 27b of the second correction signal gate group 27. At this time, the RS-FF 16 is reset by the pulse signal F and the inverted output terminal ₁₆ is output. outputs an output signal ₁₆ of H'' level from , and opens the AND gate 27a of the second correction signal gate group 27.

Next, when pulse signal E comes, RS-FF17 is set, RS-FF18 is reset, and the above-mentioned
The subtraction correction signal Y is outputted through the AND gate 27a of the second correction signal gate group 27, which was opened by the inverted output signal ₁₆ of the RS-FF 16.
At this time, the AND gate 26b of the first correction signal gate group 26 is opened by the output signal _P17 of the RS-FF 17, but since the corresponding pulse signal F does not arrive, the addition correction signal X is not output.

Further, the AND gate 27c of the second correction signal gate group 27 is opened by the inverted output signal ₁₈ of the RS-FF 18.

When the pulse signal D comes next, the RS-FF16
is set, a signal _P16 of "H" level is output from the output terminal _Q16 , and the first correction signal gate group 26 outputs the "H" level signal P16.
While opening the AND gate 26a, the RS-FF
₁₇ , and the second
The AND gate 27b of the correction signal 27 is opened. Then, the pulse signal D is transmitted from the AND gate 27c of the second correction signal gate group 27 opened by the inverted output signal ₁₈ of the RS-FF 18 to the OR gate 2.
A subtraction correction signal Y is output through 7d.

Also, in this state, the pulse signal corresponding to the opened AND gate of the first correction signal gate group 26 is not input, and the addition correction signal X is not output.

As mentioned above, when the reuse 20c is rotated in the normal direction, contact signals are outputted in the order of the fixed contacts S ₁ , S ₂ , S ₃ , and the latch circuit 8, pulse generator 12, 13, 1
4, the pulse signals are output in the order of D, E, and F, so that the direction detection circuit 15 and the first correction signal gate group 26 output a number of addition correction signals X corresponding to the pulse signals. Ru.

Further, when the reuse 20c is reversed, contact signals are outputted in the order of fixed contacts S ₃ , S ₂ , S ₁ , and pulse signals are outputted through the latch circuit 8 and the pulsing circuits 14 , 13 , 12 as F, E, By outputting in the order of D, the direction detection circuit 15 and the second correction signal gate group 27 output subtraction correction signals Y corresponding to the number of the pulse signals. The waveforms of each part are shown in FIG. 8, and the pulse signals D, E,
F has _the voltage waveform _shown in FIG _.
P ₁₇ , P ₁₈ , ₁₈ are nu, ru, wo, wa, ka, in Figure 8.
The voltage waveform is as shown in y, and the addition correction signal X and subtraction correction signal Y have voltage waveforms as shown in ta and d in FIG. 8, respectively. The addition correction signal X and the subtraction correction signal Y are connected to the up count input terminal and down count input terminal of the time counter 4, calendar counter 5, and alarm memory circuit 21, respectively, and are selected by the function selection circuit 23. Reuse 20 to modify and set the functions
Perform the operation in c.

As described above, the present invention generates a large number of signals per revolution of the reuse, generates signals proportional to the rotational speed of the reuse, performs switching efficiently and reliably even when the reuse rotates at high speed, and moreover, switches smoothly. This makes it possible to create a durable rotary switch with a comfortable operating feel, and to realize a watch switch that is highly reliable and easy to operate.

[Brief explanation of the drawing]

Fig. 1 is an external view of a digital electronic watch to which the present invention is applied, Fig. 2 is a cutaway side view showing an embodiment of the present invention, Fig. 3 is a plan view of the same, and Fig. 4 is a plan view of a switch insulator. Figure 5 is a partially cutaway side view, Figure 6 is a plan view showing the switch board, Figure 7 is a circuit block diagram of a digital watch, Figure 8 is a main circuit block diagram of the circuit. It is a voltage broken diagram. 20c...Reuse, 30...Switch car, 37...
Switch insulator, 38...Movable switch plate, S ₄ , S ₅
...Movable contact, 39...Switch spring, S ₁ , S ₂ , S ₃ ...
Fixed contact, 41... Switch board, 42... Positioning hole, 2... Crystal oscillation circuit, 3... Frequency division circuit, 4... Time counter, 8... Chattering prevention circuit, 12,
13, 14... Pulsing circuit, 15... Direction detection circuit, 16, 17, 18... RS-FF, 26... First modified signal gate group, 27... Second modified signal gate group.

Claims (1)

[Claims] 1. In the rotary switch of an electronic watch that performs switch input using a movable switch and a fixed switch,
An external operating member that can be pushed and pulled and rotated in forward and backward directions, such as a reuse; a switch wheel that rotates in proportion to the rotational speed of the external operating member and in conjunction with the rotation of the external operating member; It consists of a movable switch that rotates integrally and has at least two movable contacts, and a fixed switch that has at least three fixed contacts approximately equidistant from the center of rotation of the switch wheel, and the number of movable contacts and the A rotary switch for an electronic watch, characterized in that the number of fixed contacts is set in a relationship that does not have a common divisor.