JPS6038234Y2 - crystal clock - Google Patents

Description

[Detailed description of the invention] The invention provides 0.0% during normal operation. This invention relates to a crystal clock whose hands are moved by pulses at intervals of less than a hoe.

The purpose of this invention is to change the movement of the hands to 1 during normal times.
It is recommended to move the hands instantaneously in large divisions such as seconds, 3Ce, 1 minute, 3C@, 1 hour, etc. due to its advantages such as high reading accuracy, good hand movement feel, and simple movement structure. In this case, if the output of the electromechanical converter is not sufficient to handle the load of hand movement or the load of the calendar, etc., the output of the electromechanical converter will inevitably be
It has been proposed to move the pointer one section at intervals of less than .

To explain in more detail, in order to produce the above-mentioned advantages by instantaneously moving the hands in normal times, the interval between each movement of the hands must be 0.
It is necessary to keep the electromechanical converter operating for 2 seconds or less, the minimum time that allows safe operation, but in such instantaneous operations, it is difficult to determine whether the electromechanical converter has operated reliably or not. It is difficult to visually confirm the movement of the rows, etc. even with a binocular microscope.

Therefore, adjustment or testing for each pulse is not possible, and in the case of the above-mentioned adjustment or testing, the
It is necessary to switch to operation of the electromechanical transducer at intervals of more than a second, preferably 0, hoe-length, to facilitate the work.

In other words, watches are electromechanical transducers with a relatively small volume, and watches with built-in batteries are required to operate with low power consumption and are required to have reliable accuracy. Adjustment and test work must be carried out rigorously.

To further explain the present invention with an embodiment, Fig. 1 is a block diagram of a main part of an embodiment of the present invention, in which 1 is a crystal, 2 is a frequency dividing circuit, and the period is 3CJns, 6 (7). ”
, 1”.

The first pulse train generating circuit 4 has an output pulse of
The outputs of the frequency divider circuit 2 and the OR circuit 3 are inputted, and the output of the frequency divider circuit 2 is inputted to the second pulse train generation circuit 5.

The output pulse signals of the first pulse train generation circuit 4 and the second pulse train generation circuit 5 are controlled by a selector switch 9 that can be manually operated as desired.
The signal is inputted to a switching circuit 6 controlled by.

7 is a drive circuit, and 8 is a drive coil of the electromechanical converter.

Reference numeral 10 denotes a changeover switch resistor, which determines the state of the changeover circuit 6 when the changeover switch 9 is off.

Further, the changeover switch 9 is installed outside or inside the watch case so that it can be manually operated.

The output pulse signal of the first pulse train generation circuit 4 is used to move the hands in the normal state, and is used to control the 30m5 and 6 of the frequency divider circuit 2.
45m of OR circuit 3 which inputs output pulse of 0m5 period
These are two pulse signals (with a pulse width of 15 m5) of 30 m5 periods in 1 minute interval, which are created by the 1 min output pulse and the 30 m5 output pulse of the frequency divider circuit 2.

The output pulse signal generates a plurality of pulse signals at regular intervals as shown in time chart C in FIG. 2 corresponding to point C in FIG.

(In this embodiment, two pulses each having a width of 151 seconds are generated every minute.

). At this time, since the changeover switch 9 is off, the changeover circuit 6 is controlled by the changeover switch resistor 10 (b
corresponds to a point.

) is at the L level, the output pulse signal of the first pulse train generation circuit 4 passes through the switching circuit 6, and is further converted into alternately different polarity pulses by the drive circuit 7, and is amplified with current and sent to the drive coil 8.
transmitted to.

Therefore, the alternating different polarity pulses at point a in Figure 1 of the drive coil 8 are instantaneously outputted twice as 15m5 width pulses at a constant period of 1 minute, as shown in the first half of Figure 2. This allows accurate movement of the hands.

On the other hand, when the changeover switch 9 is turned on, the changeover circuit 6 changes from the first pulse train generation circuit selection state to 30'' and 0 of the frequency divider circuit 2.
．． The second pulse train generation circuit to which the 5' cycle output is input is selected.

The output pulse signal of the second pulse train generating circuit 5 at point d in FIG. 1 becomes a pulse signal at equal intervals as shown at d in FIG.

The output waveform at point a is at equal intervals of 0.58 cycles in the second half of FIG. 2a, that is, when the voltage at the point in FIG. 15 necessary for hand movement
This results in alternating pulses of different polarity with a width of m5.

At this time, it becomes possible to perform adjustment or observation work on the electromechanical converter, especially its mechanical parts.

In this embodiment, the first pulse train generating circuit 4 outputs two pulse signals every 10 periods of 1 m, but the present invention is not limited to this, and the first pulse train generating circuit 4 outputs two pulse signals every 1 period. The number of pulses to be generated may be an integral multiple of 2, and by setting it to 4 or 6 pulses, the torque required for one movement of the pointer can be further reduced.

Further, in this embodiment, a switch mechanism controlled by an operation member provided on a watch case is shown as a changeover switch, but the switch mechanism is not limited to this, and for example, an IC chip constituting the circuit block shown in FIG. It is also possible to provide one terminal with a switch function and supply a switch signal from a prober to this terminal during testing.

As described above, according to the present invention, by simply adding an electronic circuit,
To facilitate the adjustment and test work of a clock, to provide convenience to a person in charge of adjustment, and as a result, to produce a highly reliable clock.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts of an embodiment of the present invention, and FIG. 2 is a time chart showing the output state at each point in FIG. 1. 1...Crystal, 2...Divider circuit, 4...
...First pulse generation circuit, 5...Second pulse generation circuit, 6...Switching circuit, 7...
Drive circuit, 9...drive filter, 9...changeover switch.

Claims (1)

[Scope of utility model registration request] A crystal serving as a time standard, a frequency dividing circuit, a pulse train generation circuit that inputs the output of the frequency dividing circuit and outputs a constant pulse train;
and a drive circuit that inputs the output of the pulse train generation circuit and supplies alternately different polarity pulses to the drive coil, wherein the pulse train generation circuit generates a first pulse train that generates a plurality of pulse signals at regular intervals. a generation circuit; a second pulse train generation circuit that generates equally spaced pulse signals;
a switching circuit that inputs pulse signals from the first pulse train generation circuit and the second pulse train generation circuit and switches and outputs the inputs under the control of a switch means, and when the switch means is operated, the switching circuit A crystal watch characterized in that the first pulse train generation circuit selection state is switched to the second pulse train generation circuit selection state.