JPS5914797Y2 - External switch mechanism of electronic wristwatch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an external operation switch mechanism for cutting off the power of an electronic wristwatch.

In recent years, with the advent of vibrators with relatively stable oscillation frequencies, electronic wristwatches such as fully electronic digital wristwatches using battery power and wristwatches using pulse motors have become popular.

This electronic wristwatch constantly measures time when the battery is fixed inside the case, which naturally involves power consumption.

For this reason, conventionally, in order to suppress battery consumption as much as possible,
For example, in a display device using a light emitting diode, the display is turned on only when necessary to reduce power consumption in the display section.

However, even this is not enough, and in the end, it is possible to remove the battery when not in use and insert it only when in use.
Since electronic wristwatches are constructed to be waterproof and dustproof, it is not desirable for the user to open and close the back cover, and it is also troublesome to attach and remove the battery.

It is also conceivable to provide a separate power switch, but this would be mechanically complex and would not be suitable for a wristwatch.

In view of the above points, the present invention doubles as a switch for adjusting the time, for example, without removing the battery.
Moreover, the present invention provides an external operation switch mechanism for an electronic wristwatch that has a simple structure and is easy to operate.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a block diagram of an electronic wristwatch that digitally displays the time, and 1 is an oscillation circuit mainly comprising a crystal oscillator.

The reference pulse signal outputted from this oscillation circuit 1 is frequency-divided by a frequency divider circuit 2 into output signals every second, and then supplied to a timer circuit 3.

This time measurement circuit 3 is composed of a group of counters such as sexagesimal, decimal, hexadecimal, and decimal, and measures time such as seconds, minutes, and hours. This is displayed on the display section 5 such as a light emitting diode.

Further, a time adjustment control circuit 6 is connected to the clock circuit 3, and the time is adjusted in accordance with the operation of an operating section 7, which is a time adjustment switch.

Then, the above-mentioned oscillation circuit 15 frequency dividing circuit 2. Timing circuit 3
, the decoder/driver 4, the display section 5, and the time adjustment control circuit 6 are supplied with a battery power source 9 via the contact section 8, and perform predetermined operations, respectively.

The operating portion 7 is also used to open and close the contact portion 8, and the contact portion is normally closed and the power is supplied.

2 to 6 show the operating section 7 and contact section 8 of the correction switch, and the same parts in the figures are given the same reference numerals.

10 is a crystal resonator, an LSI (large scale integrated circuit) device,
This is a board on which electronic components such as a liquid crystal display device are arranged and housed within the watch case 11.

The substrate 10 has a notch 12 which is concave from the outer circumference toward the inside, and a plate-shaped contact piece 14 bent from the top surface to the bottom surface of the substrate 10 is fixed to the bottom surface 13 of the notch.

The contact piece 14 is connected to the time adjustment control circuit 6 shown in FIG. 1 through a wiring body (not shown).

Further, an electrode plate 15 is fixed to the upper surface of the substrate 10 in the vicinity of the cut portion 12, and a plate-shaped leaf spring is formed on the electrode plate 15 to form another electrode which is maintained at a constant distance by an insulator 16. 17
are integrally fixed with screws 18.

This electrode plate 15 is connected to an electronic component (not shown) by a wiring body.
The leaf springs 17 are respectively connected to the negative pole (or half pole) of a battery (not shown).

Further, the leaf spring 17 is provided with a hemispherical contact 19 approximately at its center and a protruding locking portion 10 at its tip.

That is, the electrode 15 and the leaf spring 17 constitute the contact portion 8 shown in FIG.

Notch 1 of the substrate 10 on the side of the watch case 11
A through hole 21 is bored at a location opposite to the through hole 2, and a substantially cylindrical protection pipe 22 is tightly fitted into the inner circumferential wall of the through hole 21.

The operating portion 7 shown in FIG. 1 is inserted into the inner circumferential wall of the protective pipe 22 so as to be slidable in the axial direction of the through hole 21. As shown in FIG.

The operating section 7 is constructed with a substantially rod-shaped operating shaft 23 as its main axis, and a groove 24 is formed on the circumference of the central portion in the axial direction. A waterproof elastic backing 25 that slides in the same manner as shown in FIG.

Further, the operating shaft 23 has a cut portion 26 that is partially cut out from the outer circumference near the inner tip, and a cam 27 made of insulating synthetic resin, which is a protruding member, can be loosely inserted into the cut portion 26 in the axial direction. It is inserted and provided so as to be fixed in the rotational direction.

The cam 27 is installed in the cutout 12 of the base plate 10 in the assembled state, and is locked at one end of the cutout 12 when not rotating, and at the other end when rotating to suppress rotation. It has locking parts 28 and 29.

Further, a crown-shaped knob 30 formed by cutting a knurl is integrally formed on the outside of the operating shaft 23, and a return spring 31 is interposed between the inner wall of the knob 30 and the protective pipe 22, so that the operating section 7 is not normally connected to the outside. It gives strength to people.

Note that the operating shaft 2 is located between the cam 27 and the elastic backing 25.
A ring 32 is attached to regulate the stroke of No. 3.

Therefore, when the contact point of the leaf spring 17 is in contact with the electrode plate 15 in the contact portion 8, power is always supplied from the battery to the electronic components and the timepiece device operates normally.

In this state, the cam 27 attached to the operating shaft 23 is maintained in a tilted state as shown in FIG.

Therefore, when the operating portion 7 is pressed from the outside, the cam 27 is in the fallen state shown in FIG. Since the electric signal is obtained from the contact piece 14, the time adjustment control circuit 6 shown in FIG. 1 is activated.

Furthermore, when the operating section 7 is simply rotated without being pressed, the cam 27 is fixed in the rotating direction by the cutting section 26 provided near the tip of the operating shaft 23.
It rotates in unison with the rotation of the operation part 7, and as shown in FIGS.
It will be maintained in an inverted position as shown in the figure.

With this rotation, the leaf spring 17 of the contact part 8 is gradually lifted upward against the spring force, and eventually the contact 19 is separated from the electrode plate 15, and the power from the battery to the electronic component is reduced. I would have to completely refuse.

Therefore, this operation part 7 has two functions: one is to keep the power from the battery supplied to the electronic components when sliding in the axial direction, and the other is to cut off the power only when it is rotated. I will have it.

In the embodiment, the cam 27 is loosely inserted in the axial direction, but it may be fixed at a position facing the contact portion 8 of the operating shaft 23, and the shape of the cam 27 is also limited to this. It's not a thing.

Further, it goes without saying that the structure of the contact portion 8 may be other than a laminated structure, and the contact piece 14 may also be other than a plate shape.

Further, although the time adjustment switch has been described as an example, the present invention is not limited to this, and it goes without saying that at least one of the display switching switches, safety switches, etc. provided in the timepiece device may also be used.

In short, modifications can be made as appropriate without departing from the gist of the present invention.

As described in detail above, the present invention provides a rotation mechanism to the external operation part that is originally included in the watch device and is operated by pressing, and when it rotates, it functions as a power switch, so that it can be used without removing the battery. The power can be cut off at times, reducing battery consumption.

This is particularly effective when there are unused watches, such as when an individual owns two or more wristwatches or when a large number of electronic wristwatches are lined up in a show window.

Moreover, since it has a structure in which a single external operation member is used and only an extremely simple rotation mechanism is added, it is very effective when applied to electronic wristwatches.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of an electronic wristwatch, Fig. 2 is a perspective view illustrating the main parts of the external operating section of the present invention, and Fig. 3 is the assembly of Fig. 1 showing the state in which the external operating section is pressed. AA sectional view, FIG. 4 is an AA sectional view of the assembly in FIG. 1 showing the rotational state of the external operating section, and FIGS. It is a BB sectional view. 7... External operation section, 8 contact section, 12... Notch section, 1
4... contact piece, 21... through hole, 27... cam.

Claims (1)

[Claims for Utility Model Registration] An operating shaft provided in a through hole of a watch case so as to be slidable in the rotational and axial directions, and a notch provided in the watch case at a location facing the through hole. a cam having a locking part that is integrally provided at the tip of the operating shaft and is locked to a side of the notch when the operating shaft rotates; a first switch mechanism that is opened and closed by a switch mechanism to control voltage supply to electronic components housed inside the watch case; 1. An external switch mechanism for an electronic wristwatch, comprising: a second switch mechanism that has a contact whose tip is contacted when pressed and controls the operation of the electronic component.