JPS5838755B2 - automotive analog clock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of analog clocks for automobiles, and is concerned with the improvement of analog clocks for automobiles.By stopping only the drive motor for the clock when the automobile is not in use, such as when the automobile is parked in a garage, the battery can be drained. To provide an analog clock for an automobile that reduces consumption and automatically adjusts the clock time to the current time when the automobile is used again.

Conventional analog clocks for automobiles always display the time regardless of whether the automobile is being used.

Car clocks use car batteries as their power source, so if the car is not used for a long time, the time display on the car clock consumes a lot of battery power, causing problems such as battery exhaustion. Ta.

Therefore, the present invention focuses on the fact that the converter such as the motor in an analog clock consumes the most current, and in an analog clock for automobiles, when there is no need to display the time, only the clock drive motor is stopped and then restarted. To provide an improved analog clock for an automobile that does not waste an automobile battery by supplying a fast forward pulse to the motor to automatically adjust the current time quickly when time display is required. With the goal.

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

2 is a reference signal generator, 4 is a frequency dividing circuit, 6 is a decimal counter, 8 is a hexadecimal counter, 10 is a switch means that is linked to the operating position of the engine key switch and stops and operates only the clock drive motor; 12.14 is a 12-hour counter, 16 is a matching circuit, and 18 is a drive motor.

And the output line 4 a s 4 b 24 of the frequency dividing circuit 4
c 16Hz, 8Hz, 4H for s4d and 4e respectively
z, 2H2, In2 signals are generated and the AND gate 20
A one-second periodic signal appears on the output line 21 of the antenna game 120.

Further, a signal with a 2-second period is generated on the output line 6a of the 10-ary counter 6, and a signal with a 10-second period is generated on the output line 6b.

The signals on the output lines 6a*5b are input to the AND gate 22, and a signal with a period of 10 seconds appears on the output line 23 of the AND gate 22.

A signal with a period of 20 seconds is generated on the output line 8a of the hexadecimal counter 8, and a signal with a period of 1 minute is generated on the output line 8b.

This output line 8a. The signal 8b is input to the AND gate 24, and a signal with a period of one minute appears on the output line 25 of the AND gate 24.

Output line 23 of AND gate 22 and AND gate 24
The signal on the output line 25 is input to the AND gate 26, and a signal with a period of one minute is generated on the output line 2T of the AND gate 26.

Furthermore, the signals on the output line 27 of the AND gate 26 and the output line 21 of the ANTO gate 20 are input to the AND gate 28. As a result, the output line 29 of the ANTO gate 28 receives a pulse width of 31, 25 m5 at a period of 1 minute. A pulse output signal is generated.

On the other hand, a 32 Hz signal appears on the output line 4f of the frequency dividing circuit 4, and is input to the l inputs of the flip-flops 30, 32, and 34 degrees.

The operation of this circuit will now be explained.

It is assumed that all flip-flops in this circuit operate in negative logic.

When the time display of the automobile analog clock is required, that is, when the engine key is turned on or operated to the accessory position, the switch means 10 is closed and the signal on the output line 11 is high.

Then, the signal on the line 38a of the output Q of the flip-flop 38 becomes H and is input to the D input of the flip-flop 30.

Therefore, the signal on the line 30a of the output Q of the flip-flop 30 becomes H and is input to the AND gate 40, and the signal on the line 30b of the output Q becomes L and is input to the AND gate 42.

As a result, a minute-by-minute signal that is in phase with the output line 29 appears on the output line 41 of the ant gate 140, and the NOR gate 44 and
It is input via an inverter 46 to the l input of a flip-flop 48 and to a Nant gate 50.52.

A signal that goes H or L every minute is generated on the output Q line 48a of the flip-flop 48, and the inverted signal appears on the output 0 line 48b, and the Nant gate 50, respectively.
, 52.

As a result, a signal every two minutes appears on the output line 51 of the Nantes gate 50 and the output line 53 of the Nantes gate 52.

This signal is pre-driver 54.56, driver 58.6
Manually power the motor 18 via 0 and move the pointer (not shown) to 1.
The hand moves one step per minute.

Here, when the time display of the automobile analog clock is not required, that is, when the automobile is parked without being used, the engine key is in the OFF state (or the engine key is removed). 10 is in an open state.

In this state, the signal on the output line 11 becomes L, and this signal is input manually to the reset input of the flip-flop 38 and to the Nant gate 72.
to be reset.

As a result, the signal on the line 38b of the output Q of the flip-flop 38 changes from L to H and is input to the reset input of the flip-flop 36, thereby canceling the reset of the flip-flop 36.

Further, the signal on the line 38a of the output Q of the flip-flop 38 changes from H to L and is input to the D input of the flip-flop 30.

As a result, the signal on the output Q line 30a of the flip-flop 30 becomes L, and the signal on the output Shu line 30b becomes H.

As a result, the signal on the output line 41 of the AND gate 40 becomes L, and the clock hand movement stops.

Further, a signal having the same phase as the output line 29 appears on the output line 43 of the ant gate 42, and is inputted to the 1 input of the 12-hour counter 12.

This 12-hour counter 12 counts the signal on the output line 43 every minute.

After 12 hours have elapsed, the signal on the output Q line 13 falls from H to L, is input to the reset input via the AND gate 62, and the contents of the 12-hour counter 12 are cleared.

For this reason, 12n+α hours (
α≧0, n=o, 1. .

2...), the 12 hour counter 12 will have counted α time.

Then, turn on the engine key again or
When operated to the position, the switch means 10 is closed and the signal on the output line 11 changes from L to H.

Then, the reset input of the flip-flop 38 and the Nant gate 72 are manually applied to release the reset of the flip-flop 38.

Further, the signal of the output line 11 is input to the zero input of the flip-flop 32.

As a result, M32a of the output Q of the flip-flop 32 is H
and is input to the D input of the flip-flop 34 and the AND gate 64.

The other input of the AND gate 64 receives the signal on the line 34a of the output Q of the flip-flop 34.

Here, since the signal on the output line 34a is H, the signal on the output line 65 of the AND gate 64 becomes H, and is inputted to the reset input of the 12-hour counter 14 via the l input of the flip-flop 36 and the inverter 66.

As a result, the 12 hour counter 14 is reset.

Thereafter, when the 32 Hz signal input to the flip-flop 36 changes from H to L, the signal on the output Q line 36a of the flip-flop 36 changes from H to L.

As a result, the signal on the output line 65 of the AND gate 64 also changes from H to L, which is inverted by the inverter 66 and input to the reset input of the 12-hour counter 14, and the reset of the 12-hour counter 14 is released.

At the same time, M36a of the output Q of the flip-flop 36
The signal changes from H to L and is input to the AND gates 68 and 70.

As a result, a signal having the same phase as the 16 Hz signal on the output line 4a appears on the AND gate 68, the output line 69, and the output line 71 of the AND gate 70.

The signal on this output line 69 is transmitted to the OR gate 44 and the inverter 4.
6 to the two inputs of the flip-flop 48 and the analogues 150 and 52.

The signal on the line 48a of the output Q of the flip-flop 48 goes high every time the 16Hz signal on the output line 69 falls from H to L.
or L, and the inverted signal appears on the output Q line 48b, and the output lines 51 and 51 of the Nant gate 50, respectively.
An 8 Hz signal is generated on the output line 53 of the Nant gate 52, and is input to the motor 18 via the predriver 54.56 and the driver 58.60.

As a result, the motor 18 rotates at a high speed of 16 Hz.

On the other hand, the 16Hz signal on the output line 71 is connected to the 12-hour counter 14.
, and the 12-hour counter 14 starts counting.

When the count contents of the 12-hour counter 12 and the 12-hour counter 14 match, that is, when the hand indicates the current time due to the high speed rotation of the motor 18, the signal on the output line 17 of the matching circuit 16 becomes H, and the Nante gate 72 Enter.

As a result, the signal on the output line 73 of the Nant gate 12 changes from H to L, and is input to reset the 12-hour counter 12 via the AND gate 62, thereby resetting the 12-hour counter 12.

Further, the signal on the output line 73 is input to the φ input of the flip-flop 38.

As a result, the signal on the output Q line 38a of the flip-flop 38 becomes H, and the signal on the output Q line 38b becomes L.

The signal on the output line 38b is input to the reset input of the flip-flop 36, and the flip-flop 36 is temporarily reset.

The signal on the line 36a of the output Q of the flip-flop 36 becomes L, and the signals on the output line 69 of the AND gate 8 and the output line 71 of the AND gate 70 become L, and the 12-hour counter 14 stops counting. , and the high-speed rotation of the motor 18 is stopped.

On the other hand, the signal on the line 38a of the output Q of the flip-flop 38 changes from L to H, and is input to the D input of the flip-flop 30.

This causes the output of the flip-flop 30, the Q line 30a
The signal on line 30b of output Q becomes H, and the signal on line 30b of output Q becomes L.

As a result, a minute-by-minute signal that is in phase with the signal on the output line of the AND gate 128 appears on the output line 41 of the AND gate 40, and the motor 18 returns to its normal state of operating one step every minute.

The signal on the output line 43 of the AND gate 42 becomes L, and 1
The two-hour counter 12 stops counting.

In this way, when the car is used again after not being used, the switch means 10 is closed by turning the engine key to ON or to the accessory position, and the hands of the watch rotate at high speed to automatically set the time. amended to the current time.

As described above, according to the present invention, when there is no need to display the time of an automobile analog clock, the drive motor can be stopped, thereby preventing wasteful consumption of the automobile battery, and when the time display is required again, the drive motor can be stopped. It is possible to provide an extremely effective automotive analog clock in which the time is automatically adjusted.

[Brief explanation of drawings]

The figure is a partial block diagram showing an embodiment of the present invention. 10...Switch means linked to the engine key, 12.14...12 hour counter.

Claims (1)

[Claims] 1. A switch means that stops and activates only the clock drive motor in conjunction with the operation position of the engine key switch of the automobile, and a count that starts from the time when the clock drive motor is stopped by the operation of the switch means and determines the current time. a counter that counts the delay between the clock drive motor and the clock drive motor; and a pulse generator that supplies the clock drive motor with a number of fast-forward pulses corresponding to the delay time counted by the counter when the clock drive motor is operated by operating the switch means. and when the timepiece drive motor is stopped by the switch means and then restarted, the timepiece is automatically adjusted to the current time by rotating the motor at a higher speed than usual and rapidly forwarding the pointer. An automotive analog clock featuring