JPH032876Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an illuminated wall clock.

[Conventional technology]

Conventionally, a sensor that detects a specific sound range has been used to detect
There is a wall clock that detects this fricative sound and turns on a lighting device for a certain period of time, allowing it to keep track of the time even in dark places.

[Problem that the invention attempts to solve]

In the above, the sensor response differs depending on the person, about 3 m for men and about 1.5 m for women.
The light will not turn on unless a fricative sound is emitted within the range.
In order to operate it from a distance of 3 meters, I had to raise my voice quite loudly, which sometimes woke up people in the same room. Considering the inconvenience to those around me, I had to get up from bed, approach the clock, and speak out loud, which was extremely annoying. The present invention provides an illuminated wall clock that can be turned on by simply waving a hand while lying down and does not malfunction.

[Means for solving problems]

The present invention is provided with a lighting device that turns on for a certain period of time when the amount of infrared rays changes within a light collection range whose lower limit is set at 16.5° to 26.5° below the horizontal.

〔Example〕

In FIG. 1, a lamp 2 as a lighting device is provided in the upper frame of a wall clock 1, and a window portion 3 is provided in the lower part of the frame. A concave mirror 4 serving as a condensing system is provided within the window portion 3 as shown in FIGS. 2 and 3. An infrared sensor 5 is provided approximately at the focal point of the concave mirror 4, and infrared rays within a certain range of the room are collected by the concave mirror 4 and supplied to the infrared sensor 5. Based on the output from the infrared sensor 5, when the amount of infrared rays changes within the above-mentioned certain range, the lamp 2 is turned on for a certain period of time. That is, if the user waves his/her hand within the above-mentioned certain range, the lamp 2 will be lit by the infrared rays emitted from the hand.

However, if the person waves his/her hand while lying down, the lamp will turn on, but it must be made so that it does not turn on when the person turns over, etc. In order to make this determination, the setting of the condensing range by the concave mirror 4 becomes an important issue, and this will be described below.

In Figure 4, a wall clock is hung at a height of 200 cm from the floor, a bed with a height of 40 cm is used as bedding, and the light collection range is set from 21.5° (upper limit) to 18.5° (lower limit) from the horizontal. The cases are shown. Then, the length of your arm when you swing your arm while lying down is 100cm.
If we assume that the vertical movement of the body due to sleeping position is within 40 cm, the range where the light does not turn on when turning over in bed but lights up when waving the clock is 200 to 416 cm from the wall where the clock is hung.
It can be seen that the range is cm.

In other words, if you sleep with your arms within a range of 200 to 416 cm from the wall, you can turn on the lamp without it malfunctioning due to turning over in your sleep.
If the distance is less than 416 cm, it will not turn on even if you wave your hand, and if you are more than 416 cm away, it will turn on even if you turn over in your sleep.

The above detectable range is determined by the height at which the clock is hung and the light collection range, and when these two requirements are changed as appropriate, detection is possible when sleeping on a bed or futon in 4.5 tatami, 6 tatami, and 8 tatami mats. 5th range
Shown in Figures 1-13.

In addition, in each figure, the mounting angle is the angle that the center of the condensing range makes with the horizontal (20° in Figure 4).
In both cases, the light collection range is within ±1.5° from this center. The hatched area is the detectable range, and if you lie down with your arm within this range, you can turn on the lamp just by waving your hand without any malfunctions.

As you can see from the above figures, the mounting angle is within 15° to 25° from the horizontal, that is, the lower limit of the light collection range is 16.5° to 25°.
As long as the angle is within 26.5 degrees, a detectable range can be obtained on at least one of the bed and futon even if the watch is hung at any height within the range of 160 to 200 cm.

As can be seen from the above, the detectable range varies depending on the size of the room and the mounting height, so it is preferable to be able to switch the mounting angle. For example, set the mounting angle to 15°, 2
By being able to switch between 0 degrees and 25 degrees, it is possible to accommodate a wide range of changes in conditions such as the height of the clock, the size of the room, and bedding (bed or futon).

Further, regarding the light collection range, only the lower limit thereof is a problem, and there is no need to particularly specify the upper limit.

Furthermore, it is preferable to control the supply of power to the infrared sensor using a CDS or the like so that the infrared sensor operates only when it is dark.

〔effect〕

According to this invention, the lighting device is turned on for a certain period of time when the amount of infrared rays changes within a certain range, so you can turn on the lighting just by waving your hand while lying down, which does not bother people in the same room. You can keep track of time without any trouble. What's more, even if you just get up to do some errands in the middle of the night, the lights will turn on, preventing the risk of walking in the dark.

Moreover, by setting the lower limit of the light collection range to 16.5° to 26.5° below the horizontal, it can be used for a wide range of heights and room sizes, and has a sufficient detection range to prevent malfunctions caused by turning over, etc. can get.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view showing the main parts of FIG. 1, and FIG.
The figure is a left side view of Figure 2, Figure 4 is an explanatory diagram showing the detectable range when the height of the clock and light collection range etc. are set to predetermined values, and Figures 5 to 13 are the height of the clock. FIG. 4 is an explanatory diagram showing a detectable range when the height and mounting angle are set appropriately. 2...Lighting device, 4...Condensing system, 5...Infrared sensor.

Claims (1)

[Scope of utility model registration request] A focusing system that collects infrared rays within a certain range and sets the lower limit of the focusing range at 16.5° to 26.5° below the horizontal, and detects changes in the amount of infrared rays collected by this focusing system. An illuminated wall clock equipped with an infrared sensor and a lighting device that lights up for a certain period of time based on the output of the infrared sensor.