JPH0662388U - Stopwatch - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent erroneous operation of the stop button. [Structure] The display device 2 is provided with a stop function determination mark 2b, and when it is desired not to stop, the stop function control switch 3c is used in advance to stop the mark 2b.
When you want to stop the function by turning off the OK and turning off the stop function, turn on the Stop OK and restore the stop function.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stop operation of a stopwatch.

[0002]

[Prior art]

 In conventional stopwatches or electronic timepieces with a stopwatch function, mechanical contact type switches operated by push buttons or crown are used to control the count start or count stop operation of the stopwatch. In particular, in the case of a wristwatch type stopwatch, many stopwatches are arranged close to the side surface of the main body of the stopwatch. Also, when you hold it in your hand, it is in a position where your finger or hand surface touches those push buttons at the same time.

When the split time is measured 10 or 20 times after starting the stopwatch by using a wristwatch type stopwatch like long-distance running in athletics, the position of the push button should be checked. However, instead of looking at each one, the inner surface of the finger or the hand touched the start / stop switch, and the stopwatch counting operation was mistakenly stopped in order to operate it as if it were a finger.

Conventionally, as a technique for preventing such a malfunction of a switch, Japanese Patent Application Laid-Open No. 1-233393 discloses, as an embodiment of an electronic timepiece with elapsed time, by rotating a bezel when an elapsed time is displayed. A technique for disabling the signal transmission from the stop signal generating circuit is disclosed. Further, Japanese Patent Laid-Open No. 1-101493 discloses a conventional example of a stopwatch as shown in FIG. -A lock switch has been introduced to mechanically or electrically prohibit the input of the start / stop switch during lap measurement.

[0005]

[Problems to be solved by the device]

 However, in these technologies, in order to determine whether the stop function is valid or invalid, it is necessary to confirm a small mark indicating the rotating position of the bezel or a slight amount of protrusion of the lock switch. Judgment is difficult, and it is almost impossible to confirm in a short time when running, and mistakes occur. An object of the present invention is to solve the above problems and provide a stopwatch that can be reliably operated without causing an erroneous operation.

[0006]

[Means for Solving the Invention]

 To achieve the above object, the present invention controls a reference signal generating circuit, a stopwatch counting circuit, a display device for displaying the count content of the stopwatch counting circuit, and the operation of the stopwatch counting circuit. In a stopwatch having a start / stop switch and a stop function control switch for controlling the stop operation of the start / stop switch, a stop function determination mark is provided on the display device. A stop function control circuit for switching and displaying the stop function determination mark according to an operation signal of the stop function control switch is provided.

[0007]

[Action]

 Since the stop function control circuit switches and displays the stop function determination mark on the display device by the stop function control switch of the external operation member, the stop function operates by observing the determination mark. Whether or not it can be easily determined.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external view of an electronic timepiece with a stopwatch showing an embodiment of the present invention. FIG. 2 is a system block diagram of an electronic timepiece with a stopwatch according to an embodiment of the present invention. First, the structure of this embodiment will be described. In FIG. 1, reference numeral 1 is an electronic watch case body. Reference numeral 2 is a liquid crystal display device, and the display device 2 is composed of a stopwatch display portion 2a, a stop function determination mark 2b, and a time display portion 2c. Now, the stopwatch display section 2a indicates 33 hours 52 minutes 42 seconds 28, the stop function determination mark 2b indicates that the stop function is valid, StopOK is lit, and the time display section 2c. Indicates a time of 1:53:25. On the side surface of the main body 1, there are provided a start / stop switch 3a, a lap / reset switch 3b, a stop function control switch 3c, and a mode changeover switch 3d which are external operation members.

Next, a system for operating an electronic timepiece with a stopwatch will be described with reference to FIG. In FIG. 2, reference numeral 11 is a reference signal generation circuit, and the reference signal generation circuit 11 is a crystal oscillation circuit that oscillates at 32 kHz. 13 is a stopwatch counting circuit including a frequency dividing circuit and a counter circuit, 14 is a display circuit, and the display circuit 14 is composed of a stopwatch display circuit 14a, a mark display circuit 14b, and a time display circuit 14c. ing. Reference numeral 15 is a stop function control circuit. The stop function control circuit 15 outputs a mark switching signal Sm to the mark display circuit 14b, and the stop function control circuit 15 outputs a stop signal St to the stopwatch counting circuit 13. Reference numeral 21 is a time counting circuit, and 22 is a mode switching circuit. A mode changeover switch 3d is connected to the mode changeover circuit 22.

Next, the operation will be described with reference to FIG. The output of the reference signal generating circuit 11 is input to the stopwatch counting circuit 13 to operate the counter circuit of the stopwatch counting circuit 13. The time signal which is the count value of the counter circuit is input to the stopwatch display circuit 14a, the time signal converted by the stopwatch display circuit 14a is output to the display device 2, and is displayed on the stopwatch display unit 2a. Displayed as Pwatch time.

Each time the stop function control switch 3c is pressed to input a one-shot pulse signal to the stop function control circuit 15, the stop function control circuit 15 causes the stop function determination mark 2b to display the display state. A mark switching signal Sm is output so as to alternately switch Stop OK, which is a stop enable display, and Stop OK, which is a non-stop display. Further, in synchronization with the mark switching signal Sm, the stop function of the counter circuit in operation is disabled by the stop prohibition signal St output from the stop function control circuit 15 described above when StopOK is off, and StoppOK is lit. Sometimes control to enable.

Accordingly, even if the start / stop switch 3a is pressed when the stop function determination mark 2b is StopOK off, which is a display indicating that stop is not possible, the stopwatch counting circuit 13 starts the start, but the stop I don't. If the start / stop switch 3a is pressed when the stop function determination mark 2b is StopOK lit, indicating that the stop is possible, the stopwatch counting circuit 13 starts the start / stop switch again. Press 3a to stop.

Therefore, when it is desired to stop the stopwatch counting of this stopwatch, it is sufficient to turn on StopOK by the stop function control switch 3c in advance. When it is not desired to stop the stopwatch counting, the stopwatch counting is stopped. It is only necessary to turn off StopOK with the function control switch 3c.

When the stopwatch counting circuit 13 is operating and the one-shot pulse signal is input to the stopwatch counting circuit 13 by pushing the lap / reset switch 3b, the latch operation of the stopwatch counting circuit 13 is performed. Working, the split status is displayed on the stopwatch display section 2a. Furthermore, when the lap / reset switch 3b is pressed to input a one-shot pulse signal to the stopwatch counting circuit 13 when the stopwatch counting circuit 13 is stopped, the display is performed via the stopwatch counting circuit 13. The reset state is displayed on the stopwatch display device 2a of the device 2. The signal of the reference signal generating circuit 11 is also input to the time counting circuit 21, and the time counting circuit 21 including the frequency dividing circuit and the counting circuit counts the time and outputs the time signal via the time display circuit 14c. The time is displayed on the display unit 2c. When the mode switch 3d is pressed, the time mode and the stopwatch mode are switched via the mode switching circuit 22. In the time mode, the start / stop switch 3a and the lap / reset switch 3b are switched. And switch to the time adjustment switch.

[0015]

【The invention's effect】

 As described above, according to the present invention, since the display device is provided with the stop function determination mark, it is possible to instantly confirm whether or not the stop is possible, and operate the stopwatch with peace of mind. Is now possible. Further effects can be expected by using a light emitting means such as an LED and an acoustic means such as a buzzer for the stop function determination mark.

[Brief description of drawings]

FIG. 1 is an external view of an electronic timepiece with a stopwatch showing an embodiment of the present invention.

FIG. 2 is a system block diagram of an electronic timepiece with a stopwatch according to an embodiment of the present invention.

[Explanation of symbols]

 2 display device 3a start / stop switch 2b stop function judgment mark 3c stop function control switch 11 reference signal generation circuit 13 stopwatch counting circuit 15 stop function control circuit

Claims (1)

[Scope of utility model registration request] 1. A reference signal generating circuit, a stopwatch counting circuit, a display device for displaying the count content of the stopwatch counting circuit, and a start / stop switch for controlling the operation of the stopwatch counting circuit. When,
In a stopwatch provided with a stop function control switch for controlling the stop operation of the start / stop switch, the display device is provided with a stop function determination mark, and an operation signal from the stop function control switch is used. A stopwatch provided with a stop function control circuit for switching and displaying the stop function determination mark.