JPS5858033B2 - battery clock - Google Patents

Description

[Detailed description of the invention] The present invention relates to a battery watch with a battery life display device.

Conventionally, as a battery life display device for a battery watch whose pointer is driven by a step motor, it is driven by a signal of one pulse per unit time when the voltage is normal, and for n units of time (n is a positive integer of 2 or more) when the voltage drops. Battery clocks are known that have a circuit that is driven by a signal of n pulses every other time.

Usually, 1 second is used as the unit time, and 2 is used as n.

In this case, the hands move every 1 second when the voltage is normal, and move by 2 seconds every 2 seconds when the voltage drops.

This display method had the disadvantage that unless you were careful about the movement of the hands, you would not notice that the battery life was nearing the end, and that two-hand watches without a second hand could not display the battery life.

The present invention ameliorates these drawbacks and provides a timepiece with a device which can also be used in two-hand watches and which can very clearly indicate, by means of a color display, that the end of the battery life is near. The purpose is to

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of the first embodiment of the present invention, in which 1 is a dial plate provided with a hole 1a, 2 is a main plate, and 3 is a step motor. 4 is a stator, 4 is a bridge, and 5 is a two-pole rotor of the motor.A display plate 7 is added to the rotor 5, and a part of the display plate 7 is arranged so as to be visible from the hole 1a of the dial plate 1. .

6 is a part of the wheel train that meshes with the rotor 5.

FIG. 2 is a plan view of the display board 7, which is color-coded into two colors: red (shaded area) and white.

FIG. 3 is a graph showing the voltage characteristics of the battery, with voltage on the vertical axis and time on the horizontal axis.

When the rotor 5 is rotated using one drive pulse every second as shown in the time chart shown in FIG. 4 during the period a shown in FIG. 3, that is, at normal voltage, the angle at which the two-pole rotor rotates with one pulse is 180 degrees, so the color visible through the display hole 1a provided on the dial 1 changes every second from red to white to red to white, as shown below the time chart in Figure 4. It serves as a seconds display.

When the battery capacity decreases and the battery voltage drops, the detection circuit detects the voltage drop and outputs a 2-second pulse every 2 seconds within an extremely short period of time as shown in the time chart in Figure 5. As shown below the time chart in Figure 5, the colors that can be seen through the holes 1a in Figure 5 are visible only for a very short time, so that one color is not visible to the naked eye and only the other color is visible.

If you want to make sure that the color turns red when the battery voltage drops, make sure that the first pulse that is output after the reset is released is on the + side, and when emitting 2 seconds worth of pulses every 2 seconds, make sure that the color is on the + side and the - side. All you have to do is build a circuit to generate 2 seconds worth of pulses in sequence, apply a reset, and add a stone plate so that the red color can be seen through the hole 1a of the dial 1.

As a result of the above, normally the colors appear alternately red, white, red, and white, but when the battery is about to run out, only red appears, indicating that the battery life has come to an end.

In the case of using a six-pole rotor in FIG. 1, the display plate may be constructed as in the second embodiment shown in FIG. 6.

In addition, if the display board is divided into three colors as in the third embodiment shown in Fig. 7, when the voltage is normal, it will be as shown in Fig. 8, and when the battery voltage drops, it will be displayed every 3 seconds as shown in Fig. 9. The same effect as in the first embodiment can be obtained by emitting pulses for 3 seconds.

Adding a display board is not limited to the rotor, but can be applied to the gear train, and it is also possible to add a color to the gears to make them visible without using a display board.

In addition, in a watch that outputs one pulse every n seconds at normal voltage, if the rotor rotates 180 degrees with one pulse, the cycle will be 0.
All you have to do is provide a rotating gear, and divide this gear or the display board attached to this gear into n parts, and color them red and white alternately.

Furthermore, even if the display board is provided with a notch as in the fourth embodiment shown in FIG. 10, or a hole is provided as in the fifth embodiment shown in FIG. Of course, the same effect can be obtained even if holes are made in the gear as in the embodiment.

As described above, according to the present invention, it is possible to provide an extremely dual-purpose watch with a new function that normally functions as a seconds display, and when the battery life is nearing the end, it functions as a battery life display that clearly indicates this in color. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the first embodiment of the present invention, FIG. 2 is a plan view of the display board of the first embodiment, FIG. 3 is a graph of battery voltage characteristics, and FIG. 4 is a diagram of the first embodiment. An explanatory diagram of the colors visible from the display section of the drive pulse time chart at normal voltage as an example,
Fig. 5 is a time chart of drive pulses when the battery voltage drops in the first embodiment and an explanatory diagram of the colors visible from the display section, Fig. 6 is a plan view of the display board of the second embodiment, and Fig. 7 is FIG. 8 is a plan view of the display panel of the third embodiment; FIG. 8 is a time chart of drive pulses at normal voltage in the second and third embodiments; A time chart of the drive pulse when the battery voltage drops in the third embodiment and an explanatory diagram of the colors visible from the display section, FIG. 10 is a plan view of the display board of the fourth embodiment, and FIG. 11 is the fifth embodiment. FIG. 12 is a plan view of the gear of the sixth embodiment. 1... Dial plate, 1a... Hole that is the display part provided on the dial plate, 2... Main plate, 3...
・Stator of step motor, 4...Receiver, 5・
...Rotor of step motor, 6 ... Wheel train, 7 ... Display board.

Claims (1)

[Claims] 1. When the voltage is normal, it is driven by one signal per unit time generated from the time reference device, and when the voltage drops, it is driven by one signal per unit time (n is a positive integer of 2 or more). In a battery watch having a step motor driven by a signal and a wheel train for driving a pointer shaft from the motor, a part of a display member attached to at least one of the wheel trains is displayed so as to be visible from the outside of the watch. A battery timer characterized by displaying a different color for each unit time when the voltage is normal, and displaying a specific color at a sufficiently large proportion of the time when the voltage drops to notify the battery life. Term 92 The battery watch according to claim 1, wherein the display member is a member coded in a plurality of colors. 3. The battery watch according to claim 1, wherein the display member is a single-colored plate having a cutout or hole, and the color seen through the cutout or hole is used as one color.