JPH04347797A - Alarm - Google Patents

Abstract

PURPOSE:To prevent an operator from declining sight and the like by fixing a distance measurement means at the head part of the operator, measuring the distance between a display and the operator and alarming at the time of measuring an allowable distance limit for over fixed time. CONSTITUTION:This device consists of a distance setting means 2 setting the allowable distance limit with regard to the display 1, a distance measurement means 3 which has a transmission part 31 emitting ultrasonic to measure the distance to the display 1 and which has a receiving part 32 receiving ultrasonic reflected from the display 1, an alarm signal generation means 4 and an alarm means 5. The operator who continues looking at the display for long time hangs and fixes a fixing part at his ear. The distance setting means 2 sets the allowable distance limit and the distance measurement means 3 measures the distance between the display 1 and the operator before starting the operation. Then, the alarm signal generation means 4 generates an alarm signal when the time for which the operator continues looking at the display 1 within the allowable distance limit is over the fixed time.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warning device for people who work while looking at a display for a long time.

0002

2. Description of the Related Art It has become a problem that people who work while looking at a display at a close distance for long periods of time suffer from decreased visual acuity and fatigue, which has an adverse effect on their health. Conventionally, devices to prevent visual acuity deterioration and fatigue include filters attached to the front of the display and special displays that suppress external light from reflecting on the display. The reality is that by reducing the amount of light rays, deterioration of visual acuity, fatigue, etc. are prevented.

0003

[Problems to be Solved by the Invention] The main cause of decreased visual acuity, fatigue, etc. is that people continue to look at a display at a close distance for a long time. However, there is no device that prevents workers from staring at displays for long periods of time.
Reducing the amount of time workers spend looking at displays was left up to individual avoidance behavior, which had a negative impact on health.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a reliable and reliable warning device for workers who look at a nearby display for a long time. shall be.

[0005]

[Means for Solving the Problems] The above objectives are to provide a distance measuring means for measuring the distance between an object to be measured such as a display and a worker, and to maintain the measured distance of the distance measuring means within an allowable distance range. If the time exceeds the predetermined time,
This is achieved by providing a warning signal generating means for generating a warning signal, and a warning means for receiving the warning signal from the warning signal generating means and issuing a warning.

[0006]

[Operation] When working to keep looking at a display at a close distance for a long time, the distance measuring means is fixed to the head such as the ear before starting the work. A distance measuring means appropriately measures the distance between the display and the worker. The warning signal generating means monitors the time when the distance measured by the distance measuring means shows a preset allowable distance range, and generates a warning signal if the distance measured by the distance measuring means continues to measure within the allowable distance range for a certain period of time or more. The warning device receives the warning signal and issues a warning to the worker using a buzzer or the like to urge the worker to take evasive action.

[0007]

[Example] The present invention will be explained below by giving examples. FIG. 1 is a configuration diagram showing an embodiment of the warning device of the present invention, and FIG.
1 is a diagram showing an embodiment of the warning device of the present invention worn by a worker, and explains a case where the worker continues to look at the display while working.

The warning device of this embodiment includes a distance setting means 2 for setting an allowable distance range with respect to the display 1 which is an object, a transmitter 32 for emitting ultrasonic waves for measuring the distance to the display 1, and If the distance measuring means 3 is equipped with a receiving section 31 that receives ultrasonic waves reflected from the distance measuring means 3, and the time during which the measured distance from the distance measuring means 3 is within the permissible distance range exceeds a predetermined time and the display 1 is not viewed for a long time. It consists of a warning signal generating means 4 which generates a warning signal when it is determined that the operation continues, and a warning means 5 which receives the warning signal from the warning signal generating means and issues a warning to the operator with a buzzer sound.

Next, a description will be given of the operation when the warning device of this embodiment is used to issue a warning to a worker who continues to look at the display for a long time. The operator fixes the device by hanging the fixing part over the ear as shown in FIG. In this embodiment, the various means shown in FIG. 1 are held in a housing provided with an ear hook as a fixing means. However, components other than the distance measuring means may be housed in a separate housing. Further, the fixing portion may be of a hair band type and may be fixed to the entire head.

Before starting work, the distance setting means 2 sets the distance between the display 1 and the worker at which a warning should be issued (permissible distance range). The distance measuring means 3 measures the distance between the display 1 and the worker wearing the warning device. An ultrasonic wave transmitter 31 in the distance measuring means 3 transmits ultrasonic waves to the display 1, and an ultrasonic receiver 32 receives the ultrasonic waves that bounce back from the display 1. The distance measuring means 3 measures the distance to the display 1 based on the phase difference between the emitted ultrasonic signal and the reflected ultrasonic signal.

[0011] If the time during which the operator continues to look at the display 1 at a distance within a certain range set by the distance setting means 2 exceeds a certain time, the warning signal generating means 4 generates a warning signal. At this time, if the worker resets the time count just by taking his eyes off the display for a moment, he will end up resting his eyes, even though the time is actually insufficient to rest his eyes. To prevent this from happening, compare the time you spend looking within a certain distance range with the time you spend looking outside a certain distance range (the time your eyes rest), and keep looking within a certain distance range. If the time spent looking outside the fixed distance range is longer than a certain time, it is determined that the worker has been looking at the display 1 for a long time, a warning signal is generated, and the warning signal is sent to the warning means 5. be done. When the signal reaches the warning signal generating means 4, a warning sound is generated to warn the operator.

[0012] It should be noted that the time period during which one continues to look within a certain distance range (
It is preferable that the ratio of working time) to time spent looking outside a certain distance range (resting time) can be varied depending on the work content.

In the above embodiment, ultrasonic waves were used to measure the distance between the display 1 and the warning device, but the measuring method is not limited, and other methods may be used to measure the distance. .

Furthermore, in the above embodiments, the object to be measured is limited to a display, but the product to be measured is not limited and may be any product.

[0015]

[Effects of the Invention] As described above, the warning device of the present invention can give a reliable and reliable warning to a worker who continues to look at a nearby object such as a display for a long time, and It can prevent damage to health such as eyesight.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a warning device of the present invention.

FIG. 2 is a diagram showing a case where a human wears the warning device of the present invention.

[Explanation of symbols]

1 Display 2 Distance setting means 3 Distance measuring means 4 Warning signal generation means 5 Warning means 31 Ultrasonic transmitter 32 Ultrasonic receiving section

Claims (2)

[Claims] 1. Distance measuring means for measuring the distance to a measurement target; when the time period during which the measured distance of the distance measuring means continues to be within an allowable distance range exceeds a predetermined time;
A warning device comprising: a warning signal generating means for generating a warning signal; and a warning means for receiving the warning signal from the warning signal generating means and issuing a warning. 2. The warning device according to claim 1, further comprising fixing means for fixing at least said distance measuring means to a human head.