JP2622440B2 - Seat vibration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat vibration device used for a driver's seat of a motor vehicle for preventing sleepless driving.

[0002]

2. Description of the Related Art Various devices have been proposed to prevent the driver of a car or the like from sleeping. These devices usually include sensing means for sensing that the driver is making a nap, and wake-up means for receiving the sneezing detection signal from the sensing means to wake the driver. For example, as the sensing means, if the driver starts to sleep, the driver will tilt his head forward and forward, so the number of times the head is tilted per unit time, the time during which the head is tilted, etc. There is something that senses and sends this to the wake-up means as a wake-up detection signal, and the wake-up means operates when the above-mentioned wake-up detection signal is sent,
Some wake up with a loud noise at the driver's ear. Therefore, according to this device, when the driver makes a nap, it senses that the driver is making a nap due to the inclination of the head, thereby activating the wake-up means to wake up the driver. be able to.

[0003]

However, since the above-mentioned device wakes up after the driver has sowed, when the driver is sowed to the extent that it cannot be sensed by the sensing means, Loss of concentration due to drowsiness may cause an accident.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a seat vibrating device capable of effectively preventing sleepless driving.

[0005]

In order to achieve the above object, a seat vibration device of the present invention comprises an actuator body, a cylindrical pressure chamber extending vertically in the actuator body, and a vertically extending pressure chamber in the actuator chamber. A rod slidably provided with an upper end protruding upward from the pressure chamber to support the seat, and a wall formed on the rod to partition the pressure chamber into an upper pressure chamber and a lower pressure chamber. A diameter portion, a switching chamber, first and second communication passages extending from the switching chamber to the upper pressure chamber and the lower pressure chamber, respectively, and a first communication passage extending from the switching chamber to a pressure fluid supply source and a pressure fluid return path, respectively. 3, a fourth communication passage, a switching valve provided in the switching chamber and capable of alternately switching the following communication modes (A) and (B), and the switching valve for alternately performing the switching in a short period of time. Control mechanism provided A configuration say. (A) A communication mode of the first and third communication paths and the second and fourth communication paths. (B) A communication mode of the first and fourth communication paths and the second and third communication paths.

[0006]

That is, the inventor of the present invention has conducted a series of studies on a device for effectively preventing the driver from sneezing, and as a result of conducting a series of studies, the driver started to sneeze, and this was detected by the sensing means. Recalling that awakening the driver does not completely eliminate the accident caused by sleepless driving, further studying and vibrating the driver's seat moderately, so that the driver can not sleep at all Thus, the inventor of the present invention has found that accidents caused by sleepless driving can be completely eliminated when sleepless driving is completely eliminated.

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

[0008]

FIG. 1 is an explanatory view showing an embodiment of a servo valve 2 and an actuator 3 used in the present invention. A pilot stage 5 and a power stage 7 are formed in the servo valve 2. A first valve rod 6 is slidable in the pilot stage 5 in the vertical direction, and a second valve rod is disposed in the power stage 7. 8 is slidably disposed in the vertical direction. The pilot stage 5 communicates with an upper portion of the power stage 7 through a fifth communication passage 11 and communicates with a lower portion of the power stage 7 through a sixth communication passage 12. An electrodynamic vibration generator 4 is provided below the pilot stage 5.
A coil 4 a is provided inside the electrodynamic vibration generator 4, and a controlled body 20 urged upward by a spring 18 is provided at an upper portion. The coil 4a is electrically connected via an inverter (not shown) to a battery 31 provided at the front of the vehicle of the automobile 34 shown in FIG. 3, and the inverter supplies electricity to the coil 4a. Converted to current. Further, a switch (not shown) for controlling ON / OFF of the current supply to the coil 4a is arranged on the control panel 32. Then, by passing an alternating current through the coil 4a, the controlled body 20 can be controlled to move up and down freely. The controlled body 20 is in contact with the first valve stem 6, whereby the first valve stem 6 is urged upward and upwardly by a tension spring 17 fixed to the upper part of the pilot stage 5. Has been energized. In the power stage 7, a first displacement transducer 21 is mounted at a lower portion thereof.
The lower part 8a of the second valve stem 8 is displaced by the displacement transducer 21.
Is detected, and this detection signal is fed back to the electrokinetic vibration generator 4.

The actuator 3 is constituted by a hydraulic cylinder. A substantially T-shaped piston rod 22 slides in a cylinder chamber formed in the actuator body 3a. The piece 22a is formed as a seat support. The cylinder chamber is provided with a pressure chamber 29 formed between upper and lower oil-tight packings 25 and 26. The pressure chamber 29 is formed by a large-diameter portion 23 formed in the piston rod 22 and an upper pressure chamber 27 and a lower pressure chamber. And a room 28. The power stage 7 of the servo valve 2 communicates with the upper pressure chamber 27 via the first communication path 13 and communicates with the lower pressure chamber 28 via the second communication path 14. The power stage 7 is connected to a hydraulic pump (not shown) by a third communication passage 16.
The first oil return path 30 is communicated with the first oil return path 30 via the fourth communication path 10. A second displacement transducer 24 is attached to a lower portion of the cylinder chamber, and the second displacement transducer 24 allows the piston rod 22 to be mounted.
The displacement of the lower portion 22b is detected, and this detection signal is fed back to the electro-dynamic vibration generator 4.
In these figures, 9 is a second oil return path, 15 is a seventh communication path communicating with the hydraulic pump, and 19 is a diaphragm, which is oil-tight between the controlled body 20 and the upper surface of the electrodynamic vibration generator 4. Installed. 33 is a handle.

In the above configuration, when an alternating current is applied to the coil 4a of the electrodynamic vibration generator 4 to move the controlled body 20 upward, as shown in FIG. 2, the first valve rod 6 moves upward. Then, the seventh communication path 15 communicates with the sixth communication path 12 to supply oil pumped by the hydraulic pump into the power stage 7 from the lower end of the power stage 7. At the same time, the second oil return path 9 communicates with the fifth communication path 11 to return oil from the upper end of the power stage 7 to a tank (not shown). As a result, the second valve stem 8 moves upward, and as a result, the third communication passage 1
6 communicates with the second communication passage 14 to supply oil from the hydraulic pump to the lower pressure chamber 28. At the same time, the first oil return path 30
And the first communication passage 13 communicate with each other through the fourth communication passage 10 to return the oil from the upper pressure chamber 27 to the tank. As a result, the piston rod 22 moves upward to raise the seat 1.
Conversely, when the controlled body 20 is moved downward, the piston rod 22 moves downward by acting in the opposite manner as described above, and the seat 1 is moved.
Is lowered. In this way, the seat 1 vibrates as the controlled body 20 moves up and down. In this case, the displacement of the first valve rod 6 in the pilot stage 5 changes the amount of oil flowing into and out of the lower pressure chamber 28 or the upper pressure chamber 27, so that the piston rod 22 vibrates at a vibration speed proportional to it. Become. Further, the detection signals from the first displacement transducer 21 and the second displacement transducer 24 are fed back to the electrodynamic vibration generator 4 so that accurate control can be performed.

In the above embodiment, if the driver feels a little drowsy, the switch arranged on the control panel 32 is operated to supply an alternating current to the coil 4a of the electrodynamic vibration generator 4, and the servo valve 2 is activated. The oil is supplied from the hydraulic pump to the pressure chamber 29 of the actuator 3 to move the piston rod 22 up and down, which is transmitted to the seat 1 and the seat 1 vibrates. For this reason, the driver does not sneak, and an accident due to sneaking can be completely eliminated.

In the above embodiment, the maximum seat load is 100 kg.
Thus, vertical vibration having a frequency of 20 Hz and an amplitude of 15 mm can be applied to the seat 1. In the above embodiment, the control panel 32 includes the coil 4a of the electrodynamic vibration generator 4.
A switch for turning on and off the power supply to the vehicle is arranged, and when the driver feels a little drowsy, the switch is pushed to supply power to the coil 4a. However, the present invention is not limited to this, and the switch is not limited to this. Alternatively, a timer may be arranged on the control panel 32.
In this case, by pressing the switch of the timer at the time of starting the vehicle, the power can be supplied to the coil 4a when the set time of the timer (for example, 10 minutes) has elapsed. Predetermined time (for example, 5 minutes)
When the time has elapsed, the power supply to the coil 4a can be automatically stopped. Such a timer is convenient when a predetermined time (for example, about 10 minutes) elapses after the vehicle starts, and it is known in advance that the user feels drowsy based on his or her experience.

[0013]

As described above, according to the seat vibration device of the present invention, the vibration generated by controlling the switching provided in the switching chamber is transmitted to the seat, and the seat vibrates. . Therefore, the driver sitting in this seat does not sneak, and the accident due to sneaking can be completely eliminated.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of one embodiment of a servo valve and an actuator used in the present invention.

FIG. 2 is an explanatory diagram showing an operation state thereof.

FIG. 3 is a schematic explanatory view of an automobile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Servo valve 3 Actuator 3a Actuator main body 4 Electrodynamic vibration generator 5 Pilot stage 6 First valve rod 7 Power stage 8 Second valve rod 22 Piston rod 27 Upper pressure chamber 28 Lower pressure chamber 29 Pressure chamber

Claims (1)

(57) [Claims] 1. An actuator body, a cylindrical pressure chamber extending vertically in the actuator body, and slidably provided in the pressure chamber up and down. The upper end of the actuator body projects upward from the pressure chamber to support a seat. A large diameter portion that divides the pressure chamber into an upper pressure chamber and a lower pressure chamber by a rod formed by the rod, a wall of the pressure chamber formed by the rod, a switching chamber, and the upper pressure chamber and the lower pressure chamber from the switching chamber. And third and fourth communication paths extending from the switching chamber to the pressure fluid supply source and the pressure fluid return path, respectively, and the following communication modes provided in the switching chamber ( A),
(B) a switching valve which can be alternately switched, and a mechanism for controlling the switching valve for alternately performing the switching in a short period of time, is provided. (A) A communication mode of the first and third communication paths and the second and fourth communication paths. (B) A communication mode of the first and fourth communication paths and the second and third communication paths.