JPH02161386A - Pointer display stop watch - Google Patents

Abstract

PURPOSE:To reduce power used for operating a step-motor and to obtain a stop watch whose size is similar to that of a wrist watch by operating the step-motor only when it is desired to know the measuring time and displaying the time. CONSTITUTION:A switch control circuit 33 outputs a start/stop signal St, a split signal Sp, a reset signal Re, etc., in accordance with an operation of external operating members 59 - 62. Unless a stop of the measurement or a display of a lap time is commanded by the signal St or Sp, a pointer is held in a zero position. When one signal of them is outputted, the pointer is operated until an indicated position of the pointer coincides with the contents of latching circuits 4, 14 and 24. Also, when the display of the lap time is released and the measurement is started, as well, the pointer is operated to the zero position. In such a way, step-motors 10, 20 and 30 are driven only when the stop time and the split time are displayed and when the pointer returns to zero, therefore, small power is enough, and a small-sized stop watch is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for operating a pointer in a pointer display stopwatch that displays a measured time using a pointer moved by a step motor.

As an alternative to conventional mechanical stopwatches, pointer display stopwatches have been devised in recent years that use a crystal oscillator as a time reference source and display measured time using hands moved by a plurality of step motors. but,
As is well known, even one step motor requires a large amount of power to operate, so in order to operate multiple step motors, a battery with a large capacity, or in other words, a large size, is required, and the battery was miniaturized to the size of a wristwatch. It was impossible to realize a stopwatch with a pointer display.

The present invention eliminates such drawbacks, and its purpose is to operate the step motor and display the measured time only when it is desired to know the measured time, thereby reducing the electric power used to operate the step motor, and using a small battery. enable the use of
The purpose is to provide a pointer display stopwatch that is the same size as a wristwatch.

Hereinafter, the present invention will be described in detail based on Examples.

Example (1) In this example, 1/l which displays digits of 1/10 second
Equipped with a second hand and a second hand that displays the second digit, and a minute hand that displays the minute digit, each hand normally waits at the 0 position and receives a time measurement stop command signal and an intermediate time display command signal (
A pointer display stopwatch that indicates a measurement time in response to a split signal Sp) will be described.

FIG. 1 is a block diagram of this embodiment. In Figure 1, 3.4.5.6.7, 8.9, l0111.12 is 1
/It is a component for displaying the digit of 10 seconds, and 13.
14.15.16.17.18.19.20.21.2
2 is a component for displaying the seconds digit, 23.2
4.25.26.27.28.29.30.31.32
is a component for displaying minute digits.

Reference numeral 1 denotes a time reference source, which is composed of a crystal oscillator and an oscillation circuit, and generates a reference signal of 32768 Hz. 2 is a frequency dividing and waveform shaping circuit that sequentially divides the 32768 Hz reference signal to form a 16 Hz signal φ16 and a 10 Hz signal φ that serves as the reference for time measurement of the stopwatch.
Form IO.

Reference numeral 58 denotes a switch that is closed when the signal (start/stop signal) St output from the switch control circuit 33 for instructing the start and stop of time measurement is at °゛H°°. The Glock necessary to display the 1/l 0 second digit will be explained below. 3 is a lO base 1/10 second time counter whose states of α, β, γ, and δ change with the fall of the clock input to the clock terminal (OP terminal), and 10 Hz is the standard for time measurement of a stopwatch. It counts the signal φ10 and is reset by a signal (reset signal) Re outputted from the switch control circuit 33 to command the rear hand. 4 is output from the switch control circuit 33 which is input to the OP terminal. When the signal (split signal) that commands the display of the intermediate time is "°°H", the data (D, , D,
, D8. 5 is a coincidence detection circuit that holds the contents of the latch circuit 9 (θ2, θ2, θ8, θ,) and the contents of the 1/10 second hand position counter ( α, β, γ, δ), and when the contents match, a match signal of "H" is output, and when they do not match, a match signal of "L" is output. 6 is 1/I which stores the indicated position of the second hand 12.
The O second hand position counter is constructed in exactly the same way as the 1/10 second time counter 3, counts the motor drive signal φMl/10 for moving the 1710 second hand, and counts the 1/10 second hand position output from the switch control circuit 33. Signal for changing the 0 position (1,/10 second hand set signal) Se1
When /10 is input to the reset terminal (R terminal), it is reset. 7 is a 1/10 second hand 0 position detection circuit that outputs a 1/10 second hand O position signal 01/10 which is H" when the l/10 second hand indicates the 0 (zero) position and L" otherwise. . 8 is a 1/l O second hand drive control circuit, when the start/stop signal St is "H" and the split signal Sp is "H".
When the start/stop signal St is "L" or the split signal sp is "H" and the coincidence signal Y e 1
/ l O is L", 16) 12 signal φ16 is output as motor drive signal φMl/10. 9 is a drive pulse shaping circuit, which outputs motor drive signal φMl/l O or 1/l O second hand set signal. When S e l / 10 is input, a step motor drive pulse PMI / 10 is generated to drive the step motor IO in response to each signal.
Output. 10 is a step motor driven by a step motor drive pulse PMI/10. Reference numeral 11 is a movement column which is interlocked with a step motor IO, and is configured such that the 1/IO second hand 12 makes one revolution in IO steps. 12 is a 1/10 second hand indicating the 1/10 second digit.

Next, the blocks required to display the seconds digit will be explained. Note that the function of each block is similar to the block necessary to display the 1/l 0 second digit, so a brief explanation will be provided. 13 is 60 that counts the IH2 signal φglee output from the 1/1O second time counter 3.
It is a progressive second hand hour counter. 14 is a latch circuit that busses and holds the contents of the clock counter 13.

A coincidence detection circuit 15 detects whether the contents of the latch circuit 14 and the second hand position counter 16 match. 16 is a sexagenary second hand position counter that stores the indicated position of the second hand 22. 17 is a second hand 0 position detection circuit which outputs a second hand 0 position signal Ogee of "H" when the second hand 16 indicates the 0 (zero) position, and "L°" when the second hand 16 indicates other positions. be. Reference numeral 18 denotes a second hand drive control circuit configured in exactly the same manner as the 1/1O second hand drive control circuit. Reference numeral 19 denotes a drive pulse shaping circuit configured in exactly the same manner as 9, and generates step motor drive pulses in response to the motor drive signal φM sec output from the second hand drive control circuit 18 and the second hand set signal Se output from the switch control circuit 33. P M , , is output.

20 is a step motor. Reference numeral 21 is a movement column which is configured such that the second hand 22 makes one revolution in 60 steps.

Next, the blocks necessary to display the minute digits will be explained, but since each block is configured exactly the same as the blocks necessary to display the second digits, the explanation will be kept brief. 23 is a 1/60 Hz signal φ3. which is output from the second hand timer 13. . count 60
It is a decimal minute time counter. 24 is a latch circuit. 26 is a minute hand position counter that stores the indicated position of the minute hand 32. 27 is a minute hand 0 position detection circuit that detects whether the minute hand has indicated the 0 (zero) position. Reference numeral 28 denotes a minute hand drive control circuit which controls the drive of the minute hand and is configured in exactly the same manner as the l/10 second hand drive control circuit 8 and the second hand drive control circuit 18. 29 is a step motor drive pulse PM corresponding to the motor drive signals φ, n and the minute hand set signal Se;
This is a drive pulse shaping circuit that outputs , , . 30 is a step motor, 31 is a transducer, and 32 is a minute hand.

33, a start, stop signal St, split signal Sp, reset signal Re, 1/I O second hand set signal S according to the operation of the external operation member 59, 60, 61, 62.
e 1/10, second hand set signal S e sec
, minute hand set signal Se1. In this embodiment, which is a switch control circuit that outputs 1, when the external operating member 59 is closed, the logic of the start/stop signal St changes cyclically, and when St is H'', the external operating member 60 When it is closed, the logic of the split signal Sp changes cyclically, and when the external operation member 62 is closed, the reset signal Re becomes “
By operating the external operating member 59 and the external operating member 60 using the select/set method with the external operating member 62 closed, the 1/10 second hand set signal S e 1/10 and the second hand set signal S e 1/10 are generated. signal 5ense
and minute hand set signal Se1. The switch control circuit 33 is configured so that , occurs. It should be noted that other configuration methods for the switch control circuit 33 may be considered, but their explanation will be omitted here.

This concludes the explanation of FIG. 1, and next, FIG. 2 will be explained.

FIG. 2 shows a specific example of the configuration of the 1/10 second hand drive control circuit 8, the second hand drive control circuit 18, and the minute hand control circuit 28 shown in FIG. 35.36.37 in Figure 2
is an inverter, 38.40.41 is an AND gate, 39
is a NAND gate, and 42 is a NOR gate. The terminal machine receives the start/stop signal St outputted from the switch control circuit 33 in FIG.
7, 17, 27) is output from the frequency division and waveform shaping circuit 2 shown in Fig. 1 at the terminal ■4.
The 16 Hz signal φ16 outputted from the terminal Is is inputted to the terminal Is, and the coincidence signal Ye outputted from each coincidence detection circuit (5, 15, 25) shown in FIG. 1 is inputted to the terminal Is. In the case of the l/10 second hand drive control circuit 8, the 0 position detection signal O is 01/lO, and the coincidence signal Ye is Yel/lO. Further, in the case of the second hand drive control circuit 18, the O position detection signal 0 is Osee, and the coincidence signal Ye is Yeg*c. Similarly, in the case of the minute hand drive control circuit 28, the 0 position detection signal O is Oo, and the coincidence signal Ye is Yem+n.

In FIG. 2, the AND gate 40 controls the start
When the stop signal St is "°H", the split signal Sp is "L", and the zero position detection signal 0 is "L", the 16Hz signal φ16 is selected as the motor drive signal φM. Furthermore, the AND gate 41 selects the 16 Hz signal φ16 as the motor drive signal φM even when the start/stop signal St″L″ or the split signal SP is °°H″ and the match signal Ye is °°L°. be done. In other words, even if the measurement is started (even if St becomes °°H), there is no signal to stop the measurement (St is "L") or a signal to display the intermediate time (Sp is °°H). ”) is not output, the pointer waits at the 0 position, and when either signal (S
When t is "°L" or sp is "H"), the pointer's indicated position (the content of the needle position counter) matches the content of the latch circuit (the match signal Ye becomes °゛H°゛). ) The pointer moves at a speed of 16Hz.Also, when the signal commanding intermediate time display is released (when Sp becomes "L"), the pointer moves at a rate of 16Hz to the zero position by the AND gate 40. Also, when a signal (St is H'') commanding the start of measurement is output again, the pointer is moved at a rate of 16 Hz to the zero position. Also, after the measurement is completed,
A signal that commands the rear hand of the hand (reset signal Re is “H”)
) is output, the time counter (3, 13, 23)
The content of becomes 0 (zero) and the coincidence signal Ye becomes °°L゛°, so the AND gate 41 indicates the pointer to the 0 position [the content of the hand position counter becomes 0 (zero)] The pointer remains at 16H until the match signal Ye becomes “H”.
The hands are moved by z.

As is clear from Figures 1 and 2, the 1/10 second hand 1
The step motors 10, 20, and 30 that move the second hand 22 and the minute hand 32 are not normally driven, but are driven only when displaying the stop time and split time and when the hands return to the 0 position. The electric power required to drive the motor becomes very small.

In this embodiment, an example was given in which all the hands wait at the 0 position and display the measured time in response to the stop command signal and the intermediate time display command signal, but depending on the battery capacity. When there is a margin, the second hand drive control circuit 18 and the minute hand drive control circuit 28 can be configured so that the second hand 22 and the minute hand 32 always indicate the measured time.

Furthermore, although this embodiment does not describe a mechanism for indicating the hour digit, the hour digit can also be displayed by having a structure similar to the mechanism for indicating other digits. can.

This concludes the description of the embodiment (1).

Example (2) In this example, each hand always indicates the measurement time for 10 minutes after the start of measurement, and after 10 minutes after the start of measurement,
I will now describe a pointer display stopwatch that operates in the same way as 1).

FIG. 3 is a block diagram of the embodiment (2).

FIG. 3 differs from FIG. 1 in the following three points.

- A new IO minute detection circuit 34 is provided to detect whether 10 minutes have passed since the start of measurement.

■ Signal 1 which is output from the lO minute detection circuit 34 and becomes °°L” for less than 10 minutes after the start of measurement and becomes °゛H°゛ after 10 minutes.
0 minute detection signal 10. ．． ．． is the multi-needle drive control circuit (8, 1
8, 28).

■16Hz signal φ16 for 1/10 second hand drive control circuit 8
In addition, a 10 Hz signal φlO is inputted, similarly, a 1Hz signal φmec is inputted in addition to φ16 to the second hand drive control circuit 18, and a 1/
A 60 Hz signal φ1ain is input.

FIG. 4 shows a specific example of the configuration of the 10-minute detection circuit 34.

In Figure 4, 43 is an OR gate and 44.45 is a NOR gate.
The gates 46 are inverters, and the NOR gates 44 .
45 constitutes an R-S flip-flop. Terminal 6 is connected to the αlO terminal of the minute counter 23, and the terminal is connected.

is connected to the β10 terminal of the minute counter 23, terminal I is connected to the γlO terminal of the minute counter 23,
A reset signal Re output from the switch control circuit 33 is input to the terminal I9.

In Fig. 4, after the measurement is completed, the signal (reset signal) Re that commands the needle after each pointer is connected to the terminal.

, the minute counter 23 in FIG. 3 is also reset by the noset signal Re,
Since both O are at L''', the signal 101 output to terminal 02 is always "L". When 10 minutes have passed since the start of measurement and α10 becomes °H", the lO minute detection signal 10., until n also becomes °゛H'' and the reset signal Re is input to the terminal I9 again. ,,, is °°L
Therefore, the 1e minute detection signal lO, 7 is "L" until the measurement time exceeds 10 minutes, and after 10 minutes "
H”.

FIG. 5 shows a specific example of the configuration of the 1/10 second hand drive circuit shown in FIG. In FIG. 5, 47, 48, 49, 50 are inverters, 51, 53, 54, 55, 56 are AND gates, 52 is a NAND gate, and 57 is a NOR gate.

The start/stop signal St is applied to the terminal 11°, and the terminal I
11 has the stop signal sp, terminal 11□ has the 1/10 second hand O position detection signal 01/lO, and terminal I 14 has the 1/10 second hand O position detection signal 01/lO.
0 minute detection signal 1O-t-, coincidence signal Yel/10 at terminal 1111, and 100Hz signal φlO at terminal I+6.
enters.

In FIG. 5, the ANDNO gate and 54 are only for controlling the operation of the pointer after 10 minutes from the start of measurement, and the other gates shown in FIG. It is exactly the same.

The ANDNO gate and 56 are for controlling the operation of the pointer less than 10 minutes after the start of measurement, and the coincidence signal Y e
When 1/10 is °゛L”, 16Hz signal φ1
6 is selected as the motor drive signal φMl/10, and the coincidence signal Y e l /10 is "H" and the split signal S
When p is "°°L", the 10Hz signal φlO is selected as the motor drive signal φMl/10. Therefore, less than 10 minutes after the start of measurement, the pointer 12 in FIG. and stops displaying the split time, and when the split time display state is released, the frequency becomes 16Hz.
The hand moves rapidly at 16Hz, stops when a stop signal is received, and when the hand moves backward, it moves rapidly toward the zero position at 16Hz, always indicating the measurement time.

Second hand drive control circuit 18 and minute hand drive control circuit 2 in Fig. 3
8 is constructed in exactly the same manner as in FIG. 5, with 0.8 instead of 01/1O. ,. and Os I n input, Y e 1
/Yes*c and Ye+m+n are input instead of 10, φsec and φ11 are input instead of φlO, and φ
φM * * c and φM s instead of Ml/10
+n is output.

As is clear from FIGS. 3, 4, and 5, l/
The step motors 120 and 30 that drive the 10-second counter 12, second hand 22, and minute hand 32 are always driven except in the split display state for less than 10 minutes after the start of measurement, but after 10 minutes after the start of measurement, Since it is driven in the same manner as in 1), the power required to drive the step motor is always small.

In this case, all the hands operate for 10 minutes after the start of measurement, which can give the user a sense of visual satisfaction.

In this embodiment, the 1/10 second hand drive control circuit 8, the second hand drive control circuit 16, and the minute hand drive control circuit 28 shown in FIG. The second hand drive control circuit 18 and the minute hand drive circuit 28 should be configured so that the second hand 22 and the minute hand 32 always indicate the measurement time when the battery has sufficient capacity. Can be done.

In addition, in this example, the operating method of each pointer is changed between less than 10 minutes and after 10 minutes, but this time can be any time as long as it is appropriate for the capacity of the battery. It doesn't matter if there is.

Further, although this embodiment does not describe a mechanism for indicating the hour digit, the hour digit can also be displayed by using a structure similar to the mechanism for indicating other digits. can.

This concludes the description of the embodiment (2).

As described above, the present invention has the excellent effect that the electric power required to drive the step motor is extremely small, and therefore the battery can be made small, and a stopwatch with a pointer display that is the same size as a wristwatch can be realized. It is something that you have.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the embodiment (1), and FIG. 2 is a 1/10 second hand drive control circuit 8 and a second hand drive control circuit 18 shown in FIG.
3 is a block diagram of the embodiment (2), and FIG. 4 is a diagram showing a specific configuration example of the minute hand drive control circuit 28.
FIG. 5 is a diagram showing a specific example of the configuration of the 0 minute detection circuit 34, and FIG. 5 is a diagram showing a specific example of the configuration of the 1/10 second hand drive control circuit 8 of FIG. 3, 13, 23 4, l 4, 24 5, 15, 25 6, l 6, 26 7, 17.27 8, 18, 28 9, 19, 29 10, 20, 30 11, 2 l, 31 12, 22, 32 33 ・ ・ ・ ・ 34 ・ ・ ・ ・ ・ ・ Timing counter latch circuit Coincidence detection circuit Hand position counter Pointer 0 position detection circuit Pointer drive control circuit Drive pulse shaping circuit Step motor Transposition pointer switch control circuit 1O min Detection circuit and more Figure 5: Hand-wrapped hand-wringing (1) Procedural amendment December 12, 1989 1. The title of the invention is corrected to "Clock pointer position adjustment means." 2. Amend the claims as shown in the attached sheet. 2. Name of the Invention Means for Adjusting the Pointer Position of a Timepiece 3. The phrase ``Relating to a pointer display'' on page 2 of the specification, lines 13 to 14, has been corrected to ``Relating to a means for correcting the position of the pointer in a watch.'' do. Representative Director 4, page 19 of the specification, lines 11 to 15, ``The present invention is...'' is replaced by ``The present invention is, as described below, in which a reset signal for a needle position counter is used to drive a step motor. Since it is used as a signal to indicate that the needle is in the atmosphere position, the needle position counter can be reliably set to zero when the needle reaches the atmosphere position, and has the advantage that the needle position counter and the pointer position can be easily matched.Correct to J. . ”2

Claims (1)

[Claims] A frequency dividing circuit (2) that divides the output signal of the time standard source (1) and outputs a time unit signal, a step motor (10) driven by a drive signal based on the output signal of the frequency dividing circuit.
, 20, 30), in a pointer display stopwatch equipped with a pointer (12, 22, 32) operated by the step motor, counting of the time unit signal is started when a start signal from an external operation switch is input. a latch circuit (4, 14, 2
4), a needle position counter (6, 16, 26) that counts the number of drive signals supplied to the step motor; a coincidence detection circuit (5, 15, 25) that detects coincidence between the time counter and the needle position counter; , connected between the frequency dividing circuit and the step motor and controlled by the coincidence detection circuit, so that when the coincidence circuit detects a mismatch, the counted value of the hand position counter matches the counted value of the time counter. A pointer display stopwatch characterized by comprising a drive control circuit (8, 18, 28) for supplying a drive signal to a step motor.