JPH0618317Y2 - Human body detection clock - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detection timepiece.

[0002]

2. Description of the Related Art In a conventional wall clock or table clock, a display portion is fixed to a timepiece body so as not to rotate.

[0003]

In the conventional timepiece, the display range is limited depending on the place where the timepiece is installed, and cannot be seen diagonally or from behind.

The present invention is such that the time can always be read accurately from the front with a simple structure.

[0005]

DISCLOSURE OF THE INVENTION The present invention uses a human body sensor that rotates periodically to rotate a rotatable time display section.
Direction and the rotation direction of the human body sensor are converted into voltage,
When an output exceeding the reference voltage occurs from the human body sensor
The voltage corresponding to the direction of rotation of the time display is
Until the voltage corresponding to the rotation direction of the
The Rukoto and the arrangement for rotating, have achieved the above objects.

[0006]

1 and 2, a motor (not shown) is built in a base 1, and a time display portion 2 is mounted so that it can be freely rotated by this motor. There is. A fixed frame 3 is non-rotatably fixed to a shaft 4 standing upright from the base 1. Reference numeral 5 is a window made of a semitransparent resin, and a sensor block 6 is provided therein. The sensor block 6 is composed of a concave mirror 7 and an infrared sensor 8 provided at a substantially focal position of the concave mirror 7. A motor block 9 is fixed to the upper surface of the inside of the frame body 3, and its rotating shaft 9a is reciprocally rotated within a fixed angle by a mechanism (not shown) in the block. The sensor block 6 is fixed to the rotation shaft 9a, and the sensor block 6 is reciprocally rotated within a fixed angle.

In FIG. 3, reference numeral 10 is a motor in the base 1, and the terminal 10a slides on the resistor 11 in response to the rotation thereof, and the motor 10 (time display portion 2) is moved from the terminal 10a. A voltage corresponding to the rotational position is generated. 6a is a terminal which moves on the resistor 12 according to the rotation of the sensor block 6, 13 is a buffer, and 14 is a comparison circuit which compares the output from the infrared sensor 8 with the reference voltage V. Resistor 12, buffer 1
3 and the comparison circuit 14 constitute a judgment means. A control circuit 15 controls the rotation direction and rotation amount of the motor 10, and rotates the motor 10 so that the voltage from the terminal 10a matches the output voltage from the buffer 13. Motor 10, resistor 11 and control circuit 15
It constitutes the control means.

Next, the operation will be described. The mode of Figure 1
The sensor block 6 is slowly rotated within a fixed angle by the sub block 9, and one reciprocation of the sensor block 6 detects where a person is in a range of about 180 degrees forward. With the rotation of the sensor block 6, the terminal 6a reciprocates on the resistor 12,
A voltage corresponding to the direction of the sensor block 6 is generated from the terminal 6a.

On the other hand, the output from the infrared sensor 8 is supplied to the comparison circuit 14 and compared with the reference voltage V. When the sensor block 6 faces the person, infrared rays from the human body are detected by the infrared sensor 8 and a voltage higher than the reference voltage V is generated. Therefore, an output is generated from the comparison circuit 14, a voltage of the terminal 6a is generated from the buffer 13, and the control circuit 1
5 is supplied. The control circuit 15 compares the voltage from the buffer 13 with the voltage at the terminal 10a, and rotates the motor 10 so that they match. That is, the time display unit 2 in FIG. 1 is rotated. When the time display unit 2 faces toward the human body, the voltage from the terminal 10a matches the voltage from the buffer 13, and the motor 10 stops rotating.

On the other hand, the sensor block 6 rotates slowly, and when the human body goes out of the detection range, the comparison circuit 1
The output from 4 stops, and the output from the buffer 13 stops.

As described above, the sensor block 6 continues to rotate slowly, and when the human body is detected, the control circuit 1
The motor 10 is rotated by 5 and the time display portion 2 is directed in that direction.

It should be noted that the sensor block and the time display section are 3
You may be able to rotate 60 degrees.

The time display section may use a digital display.

[0014]

According to the present invention, since the human body sensor is constantly rotating in the desired range, and the time display unit is directed in the direction in which the human body is detected, a wide range can be detected by one sensor. It is possible and structurally simple. Moreover, the rotation direction of the human body sensor and the time display is changed.
Turn the time display until it is converted into a voltage and they match.
By setting the direction of the time display by turning it,
With a simple structure, accurately set the time display section in the direction of the human body.
It can be pointed and the time can be read from the front, making it easy to see. Further, since the sensor is constantly rotating, it can be used as a rotating decoration, and a decorative interesting effect can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

2 is a partial cross-sectional side view of FIG.

FIG. 3 is an electric circuit diagram showing an example of a circuit configuration.

[Explanation of symbols]

 2 ... Time display unit 6 ... Sensor block 8 ... Infrared sensor 10 ... Motor 11 ... Resistor 13 ... Buffer 14 ... Comparison circuit 15 ... Control circuit

Claims (1)

[Scope of utility model registration request] 1. A rotatable time display section and this time display
First conversion means for converting the rotation direction of the body into a voltage, a human body sensor that rotates periodically, and a rotation direction of the human body sensor
The second conversion means for converting the voltage into voltage and the human body sensor
First conversion when an output voltage higher than the reference voltage is generated from
The output voltage of the means matches the output voltage of the second converting means
The human body detection timepiece including a driving means for rotating the time display section .