JPH0316501Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a desk device.

In this specification, desk equipment refers to equipment used for studying, various types of office work, reading, etc., and includes various forms such as those consisting of only a desk such as a tatami desk, and those consisting of a combination of a tatami desk and a seat chair. I can think of things.

[Prior art and its problems]

When a person sits at a sitting desk, study desk, office desk, etc. for long periods of time to study, process paperwork, read, etc., it is important to maintain a correct posture to prevent fatigue and maintain health. Therefore, a seated person usually
We try hard to keep our posture correct, but as we immerse ourselves in studies etc., our posture tends to deteriorate at some point. Furthermore, in some cases, it is possible that students fall asleep when they should be studying hard.

In such a case, it is convenient if the desk, chair, etc. is equipped with a means for notifying the seated person that the seated person's posture has fallen out of a predetermined range.

Therefore, for example, Japanese Utility Model Application Publication No. 59-164524 uses a transducer that emits ultrasonic waves or infrared rays and its sensor to catch when the posture of a desk user collapses in front of a predetermined virtual line. We are teaching a study desk with a posture corrector that emits an alarm.

However, such a desk device does not allow the user to sit down temporarily, lean forward temporarily to pick up something on the desk, or extend his/her hand forward. There is a problem in that an alarm is issued, and the frequency of alarm occurrence is unnecessarily high, which can actually interfere with learning, office work, etc.

SUMMARY OF THE INVENTION An object of the present invention is to provide a desk device that detects when the posture of a seated person continuously deviates from a predetermined range for a predetermined period of time and issues a warning to the seated person.

[Means for solving the problem] In accordance with the above-mentioned purpose, the present invention has a first method for detecting that a person is seated in front of a desk.
a second detection means for detecting that a seated person is within a predetermined position range; and a second detection means for detecting that a seated person is within a predetermined position range; Second
means for determining whether the posture of the seated person has deviated from the predetermined position range for a predetermined period of time based on a signal from the detection means, and outputs an alarm signal if the posture of the seated person has deviated from the predetermined position range; To provide a desk device characterized by comprising: an alarm means for issuing an alarm when an alarm signal is output.

Various types of the first detection means and the second detection means can be considered. For example, the first detection means may include a load cell using a strain gauge, which is conveniently installed in the seat of a chair, and other various pressure sensors.
Another example is an infrared sensor installed on a desk or chair to detect infrared rays emitted from the human body, and the second detection means may include various photo sensors, ultrasonic sensors, infrared sensors, etc. .

The number, mounting position, mounting angle, etc. of the first detection means and the second detection means can be arbitrarily selected and determined depending on the type of the means, the detection ability, etc., and the physique of the desk user.

Further, it is desirable that the mounting positions, mounting angles, etc. of the first detection means and the second detection means can be adjusted.

There are various possible warning means, but
For example, a type that sounds a buzzer or bell, a light that lights up or flashes repeatedly, a speech synthesis LSI that makes you say, "What is that cactus?"
Examples include a combination of a speaker and a speaker, or a combination thereof.

[Effect]

According to the desk device of the present invention, when a user sits in front of the desk device, the first detection means first detects that the user is sitting in front of the desk. Subsequently, the posture of the desk user (seated person) is monitored by the second detection means, and when the posture falls out of a predetermined tolerance range for a predetermined period of time, an alarm signal is output from the alarm signal output means. An alarm is issued from the alarm means.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The embodiment shown in FIG. 1 is a desk device for studying, and includes a desk 1 and a chair 2.

The desk 1 is equipped with an infrared sensor 3 for detecting a person sitting on a chair 2 facing the desk 1.

Further, the desk 1 has a book stand 11 thereon. A part of the book stand is equipped with a diffuse reflection type photo sensor 4 and an alarm device 6. Alarm device 6
is the type that sounds a buzzer.

The photo sensor 4 is supported so that its position can be adjusted vertically and horizontally so as to face the head of the person sitting on the chair 2.

The infrared sensor 3 detects when a person faces the desk 1 and sits on the chair 2, and outputs an H (high) signal. When the person leaves the desk, the output becomes L (low).

In addition, the photo sensor 4 is configured so that the light emitted from it is in the correct posture (within a predetermined tolerance range).
Its position is adjusted so that it hits the head of a person sitting at a desk, and when it receives reflected light from the head, it outputs an H signal. If the posture collapses, the reflected light cannot be received and the output becomes L.

As shown in Figure 2, the outputs of sensors 3 and 4 are sent to a microcomputer (hereinafter referred to as "microcomputer").
7 is input. An alarm device 6 is connected to the output port of the microcomputer 7 via a drive current supply circuit 61. The circuit 61 and the microcomputer 7 are also supported at appropriate positions on the desk 1.

When the output of the infrared sensor 3 is H and the output of the photo sensor 4 becomes L, the microcomputer includes a clock means for counting the time t ₀ during which the output of the infrared sensor 3 becomes H, and the output of the photo sensor 4 as a result of time measurement by the clock means. is L for a predetermined continuous time T ₀ , then
It has a function corresponding to means for outputting an alarm signal to the current supply circuit 61.

According to the desk device, when a user sits in front of the desk, the infrared sensor 3 first detects that the user is sitting in front of the desk. Next, the posture of the desk user (seated person) is monitored by the photo sensor 4, and if the posture falls out of a predetermined tolerance range for a predetermined period of time, an alarm signal is output from the microcomputer 7, and the alarm device 6 A warning will be issued.

Next, the operation of the microcomputer 7 will be explained with reference to the flowchart shown in FIG.

First, in step it is determined whether the signal from the sensor 3 is H or L. If the level is L because no one is sitting on chair 2 yet, the step is repeated, and when the level is H because a person is seated, the process moves to the next step. In step, it is determined whether the signal from the photo sensor 4 is H or L. When the posture of the seated person is within a predetermined tolerance range, the photo sensor 4
If the signal from the seat is H, the process returns to the step, but if the seated person's posture collapses from the above-mentioned allowable range and becomes L, time measurement is started in the step, and the continuation time t ₀ of the posture collapse is set to a predetermined time. It is determined whether T is greater than or equal to ₀ .

If t ₀ <T ₀ in step, it is determined in step whether the signal from the photo sensor 4 is H or L, and if it is H (that is, the posture returns to within the allowable range), the process returns to step L. If so (that is, if the posture remains outside the allowable range), it is determined in step whether the signal from the sensor 3 is H or L. As a result of this judgment, if the signal from the infrared sensor is L (the person is away from the chair), the process returns to step, and if it is H, the process returns to step again, and ~ is repeated until t ₀ ≧ T ₀ . It can be done.

If it is determined in the step that t ₀ ≧T ₀ , in other words, if the posture collapse continues for a time T ₀ or more, an alarm signal is issued in the step. When the alarm signal is emitted in this way, the current supply circuit 61 is activated, the buzzer of the alarm device 6 sounds, and the seated person is notified of the collapse of their posture.

After the alarm signal is issued in the step, the signal from the photo sensor 4 is determined to be H or L in the step.
If the result is H, the transmission of the alarm signal is stopped at the step, and the process returns to the step to continue monitoring changes in the posture.

If the signal from the sensor 4 is L in step, it is determined in step whether the signal from infrared sensor 3 is H or L. If it is H, the process returns to step again, but if it is L, an alarm signal is sent in step. stop transmitting, return to the step, and wait for the person to sit on the chair.

[Effect of idea]

According to the desk device of the present invention, if the posture of a seated person deviates from a predetermined range, such as if the seated person deviates from a healthy and correct posture for a predetermined period of time, or deviates from a normal study posture due to falling asleep, this will occur. This has the effect of being able to detect and issue a warning to the seated person.

Furthermore, according to the desk device of the present invention, even if a seated person temporarily loses his or her posture due to sitting up, picking up something on the desk, etc., the posture does not continue to deteriorate for a predetermined period of time. Otherwise, the alarm will not be issued, so the alarm will not be issued unnecessarily due to the above-mentioned temporary sitting up, etc., and the user can concentrate on studying etc. without being bothered by the alarm.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of an entire example of a desk device, FIG. 2 is a block circuit diagram of a portion used for alarm transmission, and FIG.
3 is a flowchart showing the operation of the microcomputer shown in the figure. 1... desk, 2... chair, 3... infrared sensor,
4...Photo sensor, 61...Current supply circuit, 6
...Alarm device, 7...Microcomputer.

Claims (1)

[Scope of claim for utility model registration]
a second detection means for detecting that a seated person is within a predetermined position range; and a second detection means for detecting that a seated person is within a predetermined position range; Second
means for determining whether the posture of the seated person has deviated from the predetermined position range for a predetermined period of time based on a signal from the detection means, and outputs an alarm signal if the posture of the seated person has deviated from the predetermined position range; A desk device comprising: an alarm means that issues an alarm when an alarm signal is output.