JPH0730791U - Driving seat - Google Patents

Abstract

(57) [Abstract] [Purpose] A driver's seat that can relieve low back pain when driving a moving object such as a car, prevents back pain by not pressing the abdomen and the sacral nerve, and is an air adjuster. Allow the function to be performed automatically. [Structure] The seat back is provided with a slidable air pillow having a protrusion for supporting the third lumbar vertebra of the driver, and further for supporting the sacrum and coccyx of the driver in the recess between the seat seat surface and the seat back. Provide another air pillow. Further, at least one of the air pillows is provided with a pressure sensor, and an output signal from this pressure sensor controls the air pump to supply air of a constant pressure to each air pillow.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a driving seat, and more particularly, to a driving seat capable of relieving low back pain when driving a moving object such as an automobile.

[0002]

[Prior art]

 As a first conventional example, a lumbar support adjuster, for example, has been proposed as a driving seat for reducing back pain. This lumbar support adjuster is a mechanism to move the support pad that gives the driver's lumbar support force to the back and forth of the seat via a torsion bar for the purpose of reducing fatigue during long running. is there.

In addition, as a second conventional example, in the operating seat proposed in Japanese Utility Model Laid-Open No. 63-103450, a wide and flat kamaboko type air chamber is formed in the seat back by using a manual air pump. It has a lumbar support function.

Further, in order to prevent the residual air from being difficult to escape when the air pressure in the air mat (air chamber) is lowered, in the third conventional example, there is a single unit in Japanese Utility Model Laid-Open No. 2-147061. An operation seat has been proposed in which the air pump supplies air to the air mat and forcibly exhausts it by moving the motor only by operating the knobs.

[0005]

[Problems to be solved by the device]

 In the above-mentioned first conventional example, the vicinity of the third lumbar vertebra B3 of the driver shown in FIG. 9 is supported, but since the supporting surface is made large considering the height difference of the driver, the spine B is supported. The erection of the spine of the spine (which is a general term for the three muscles of the intestinal costal muscle, the longest muscle that runs long along both sides of the spine, the longest muscle, and the spinous muscle) that stretches the spine, and the spine of the spine B does not extend, and It becomes "posture" and presses the abdomen and causes fatigue.

Further, in the second and third conventional examples, it is impossible to properly support the vicinity of the third lumbar vertebra B3 of the driver.

Further, in any of the above-mentioned conventional examples, the sacrum portion is fitted into the recess between the seat seat surface and the backrest (seat seat surface and seat back), and the posterior curve of the coccygeal part is generated. The protective function that acts as a cushion of the intervertebral disc, which is compressed by body weight and bends to soften the impact on the spinal column, does not function and the sacral nerve is compressed, resulting in back pain.

Further, in any of the conventional examples, there is a problem in that the driver has to perform a lever operation or a manual pump operation in some way during traveling, which is dangerous.

Therefore, the object of the present invention is to realize a low back pain relieving driving seat that does not press the abdomen and prevents the sacral nerve from being pressed to prevent back pain and automatically perform an air adjusting function. And

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, a driving seat according to the present invention comprises a slide rail provided on a seat back for adjusting a height difference, and a protrusion attached to the slide rail for supporting a third lumbar vertebra of a driver. And a second air pillow that is provided in a recess between the seat seat surface and the seat back to support the sacrum and coccyx of the driver.

Further, in the above-mentioned present invention, each air pillow is controlled by controlling a pressure sensor provided on the back side of at least one of the air pillows, an air pump, and an ON / OFF signal output from the pressure sensor. And a control circuit for supplying a constant pressure of air.

[0012]

[Function] Since the front and back curvatures of the spine of the human body (four parts of the neck, chest, waist, and sacrum) (see FIG. 9) are purposeful for performing upright walking, the posture on the driver's seat is also the posture of upright walking. It is most desirable to approach.

Therefore, it is necessary to support the third lumbar portion in accordance with the driver by the seed back.

However, the weight of the driver's upper body (vertical load) applied to the seat back is applied not only to the spine but also to the sacrum and coccyx, and the muscular strength in the vicinity of the sacrum and coccyx increases the weight of the upper body. Below that, it becomes impossible to support the weight and the sacrum part gets stuck in the space between the seat and the seat back, causing the above-mentioned conventional problems. It can help the nearby muscles and bring the spine closer to an upright walking posture.

Further, by supporting the sacrum and coccyx, the positions of the sacrum and coccyx supporting part of the seat seat surface and the sacrum and coccyx are determined, and when the spine approaches an upright walking posture, the sacrum and coccyx have a fixed point. The length of the third lumbar vertebra will be within a small value (20 mm) even if the difference in height is taken into consideration (even for 95% tiles).

Therefore, according to the present invention, the first air pillow attached to the slide rail provided on the seat back supports the third lumbar vertebra of the driver by the protrusion thereof. At this time, the first air pillow slides on the slide rail according to the height difference of the driver, and the protrusion is applied so as to support the third lumbar vertebra of the driver.

A second air pillow provided in the recess between the seat seat surface and the seat back supports the sacrum and coccyx of the driver.

Therefore, by supporting the sacrum and coccyx together with the third lumbar vertebra, it is possible to prevent the sacrum and coccyx from being pressed by the weight and to extend the spine, and to position the third lumbar vertebra. 3 The support points of the lumbar vertebrae can be fixed more reliably, and thus the back pain can be prevented.

[0019]

【Example】

 FIG. 1 is an external perspective view showing an embodiment of a driving seat according to the present invention. In the drawing, 1 is a seat, 2 is a seat back, 3 is a headrest mounted on the upper part of the seat back 2, and 4 is a seat. A slide rail embedded in the back 2 and attached, 5 is an air pillow for protecting the lumbar region (first air pillow) attached to the slide rail 4, 6 is a seat seat surface of the seat 1 and the seat back 2 An air pillow (second air pillow) for protecting the sacrum and coccyx provided in the depression, 7 is a pressure sensor provided on the back side of the air pillow 5 for detecting the air pressure of the air pillow 5, and 8 is an air A pressure sensor provided on the back side of the air pillow 6 for detecting the air pressure of the pillow 6, 9 is an air pump for supplying the air pressure to the air pillows 5, 6, 10 is a pipe connected to the air pump 9, and 11 Is the air of pillows 5 and 6 A release solenoid valve for withdrawing. At least one of the pressure sensors 7 and 8 may be provided.

FIG. 2 shows the shape of the air pillow 5 provided in the seat back 2 of the driving seat according to the present invention shown in FIG. 1, in which FIG. 2 (a) shows a front view, The figure (b) shows the plan view, and the figure (c) shows the sectional view when the figure (a) is cut along the line segment AA.

First, as shown in the front view, side support portions 14 are provided on both sides of the air pillow 5 so as to fit the muscle shape of the side portion of the spine.

The air pillow 5 has a side surface shape that matches the constant curve of the spine B shown in FIG. 9 as shown in the sectional view taken along the line AA of FIG. Further, the third lumbar vertebra B3 therein is supported by the protrusion 13 provided on the air pillow 5.

FIG. 3 shows the structure when the air pillow 5 shown in FIG. 2 is attached to the seat back 2, and the air pillow 5 is attached via the attachment stay 12 as shown in FIG. It is attached to the slide rail 15.

The slide rail 15 is made of U-shaped channel steel, and has a mounting plate 16 built into the recess, and the mounting plate 16 can be moved up and down by a spring 17.

Then, by screwing the mounting plate 16 to the mounting stay 12 of the air pillow 5, the air pillow 5 can be moved up and down the seat back 2.

Therefore, according to the height difference of the driver, the protrusion 13 shown in FIG. 2C can be brought into contact with the third lumbar vertebra B3 of the driver, and the third lumbar vertebra can be optimally supported. You can

FIG. 4 shows the mounting state of the air pillow 6 shown in FIG. 1. FIG. 4A is a front view, FIG. 4B is a plan view, and FIG. Shows a side view.

As shown in FIG. 4, a mounting stay 18 is provided on the lower side of the air pillow 6, and the air pillow 6 is recessed between the seat 1 and the seat back 2 as shown in FIG. In this case, the mounting stay 18 can be fixed by screwing it with the mounting plate 19 provided on the seat 1.

In this case, it is preferable that the air pillow 6 has an elliptical bulging shape as shown in the drawing, and by this shape, the sacrum and coccyx are fitted into the recesses of the seat 1 and the seat back 2 and supported. .

FIG. 5 schematically shows a mounting portion of the pressure sensors 7 and 8 shown in FIG. 1. The pressure sensor 7 is mounted on the seat back 2 as shown in FIG. A depression 70 having a size is provided, and the pressure sensor 7 is attached to the depression 70.

The pressure sensor 8 has a recess 80 formed between the seat 1 and the seat back 2 as shown in FIG. 1B, and the pressure sensor 8 is attached to the recess 80.

FIG. 6 is a diagram for explaining the operating state when the semiconductor strain gauge element 20 is used as the pressure sensor 7 or 8 shown in FIG. 5, and as shown in FIG. The pressure receiving surface 21 is vertical.

On the other hand, when the pressure receiving surface 21 receives the pressure P as shown in FIG. 6B, the strain gauge element 20 at the central portion of the pressure receiving surface 21 is pulled and the elements at the outer peripheral portion are pressed. . Therefore, the resistance of the strain gauge element 20 in the central portion increases, and the electric resistance of the strain gauge element 20 in the outer peripheral portion decreases. The state of pressure is detected by changing the change in the electric resistance into the change in the current.

FIG. 7 shows a circuit diagram when the pressure switch (see FIG. 8) is operated by changing the electric resistances of the pressure sensors 7 and 8 in this manner. The connection point between the resistor and the pressure sensors 7 and 8 is connected to the inverting input terminal of the operational amplifier A1 and the connection point between the resistor and the resistance is connected to the non-inverting input terminal of the operational amplifier A1. The output terminal of the operational amplifier A1 is connected to the base terminal of the transistor Q1 via a resistor, and the collector terminal of the transistor Q1 is connected to the pressure switch 22 to drive the switch 22.

In the operation of the circuit of FIG. 7, the non-inverting input terminal of the operational amplifier A1 is always supplied with a voltage based on the divided voltage of the resistor, and the reference voltage, the resistor and the pressure sensor 7, 8 is compared with the divided voltage, and if the reference voltage becomes lower than the terminal voltage of the pressure sensors 7 and 8, the output signal of the operational amplifier A1 is turned off, the transistor Q1 is also turned off, and the pressure switch 22 is turned on (closed). ) State (state of FIG. 8). In the opposite case, the operational amplifier A1 is turned on and the transistor Q1 is turned on to drive the pressure switch 22 to turn it off (open).

An air pump operating circuit including a pressure switch 22 driven by such pressure sensors 7 and 8 is shown in FIG. 8. The pressure switch 22 is connected in series with the air pump 9, and The power is supplied by driving an air pump relay 24 via a fuse 23.

The “1” side terminal of the main switch is connected to the air pump relay 24, and the fixed contact of the main switch 25 is connected to the capacitor 26. The "0" side contact of the main switch 25 is connected to the ground potential via the solenoid valve 27.

The operation of the air pump 9 in the circuit shown in FIG. 8 is performed as follows.

(1) First, a key switch (not shown) of the vehicle is turned on.

(2) Next, the main switch 25 is turned on. This indicates switching to the "1" side in FIG. Therefore, the capacitor 26 used for the release valve 27 is charged via the fuse 23, the air pump relay 24, and the main switch 25.

(3) As a result, the air pump relay 24 is actuated to be turned on and switched to the side opposite to that shown in the drawing, so that the air pump 9 is operated via the fuse 23, the air pump relay 24, and the pressure switch 22. The pressure switch 22 is normally in the ON state.

(4) The pressures of the air pillows 5 and 6 become ideal values, and the pressure switch 22 is turned off. This is because the pressure sensors 7 and 8 shown in FIG. 7 are in the state as shown in FIG. 6 (b), and the electric resistance of the pressure sensors 7 and 8 decreases, so that the divided voltage between the resistance and the pressure sensors 7 and 8 decreases. Since the inverting input terminal voltage of the operational amplifier A1 is lowered, the output signal of the operational amplifier A1 is turned on, the transistor Q1 is turned on, and the pressure switch 22 is turned off.

(5) As a result, the air pump 9 stops operating.

(6) When the pressure of the air pillows 5, 6 decreases, the resistance value of the pressure sensors 7, 8 shown in FIG. Then, the transistor Q1 is turned off, and the pressure switch 22 returns to the on state as shown in FIG.

(7) Therefore, the air pump 9 operates again, the pressures of the air pillows 5 and 6 rise to the ideal values, and at that time, the pressure switch 22 is turned off.

As long as the main switch 25 is ON in this way, the above steps (6) to (7) are repeated to keep the pressure of the air pillows 5, 6 constant.

Then, since the voltage of the charged capacitor 26 is applied to the release valve 27 at the same time when the main switch 25 is turned off, the release valve 27 is opened and the air of the air pillows 5 and 6 is extracted. Become.

[0048]

[Effect of device]

 As described above, according to the driving seat of the present invention, the seat back is provided with the slidable air pillow having the protrusion for supporting the third lumbar vertebra of the driver, and the seat seat surface and the seat back are provided. An additional air pillow is provided in the depression to support the driver's sacrum and coccyx, reducing pressure on the abdomen, reducing fatigue, and reducing back pain.

Further, according to the present invention, at least one of the air pillows is provided with a pressure sensor, and an output signal from the pressure sensor controls the air pump to supply air of a constant pressure to each air pillow. With this configuration, it is possible to automatically maintain a preferable air pressure without any manual operation during traveling.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a driving seat according to the present invention.

FIG. 2 is a view showing the shape of an air pillow for supporting the lumbar spine used in the driving seat according to the present invention.

FIG. 3 is a view showing a structure when the air pillow shown in FIG. 2 is attached to a seat back.

FIG. 4 is a view showing the shape of an air pillow for supporting the sacrum and coccyx used in the driving seat according to the present invention.

FIG. 5 is a schematic view showing a mounting state of a pressure sensor used in the driving seat according to the present invention.

FIG. 6 is a diagram showing an operating state of a semiconductor strain gauge element as a pressure sensor used in the driving seat according to the present invention.

FIG. 7 is a diagram showing a drive circuit for driving a pressure switch by a pressure sensor.

FIG. 8 is a view showing an air pump operating circuit used in the driving seat according to the present invention.

FIG. 9 is a view schematically showing a spinal structure of a human body.

[Explanation of symbols]

 1 Seat 2 Seat Back 4 Slide Rail 5 Lumbar Spine Protection Air Pillow (1st Air Pillow) 6 Sacral and Coccyx Protective Air Pillow (2nd Air Pillow) 7, 8 Pressure Sensor 9 Air Pump 13 Projection 15 Slide In the rail diagrams, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Scope of utility model registration request] 1. A slide rail for adjusting a height difference provided on a seat back, and a slidable first air pillow having a projection portion attached to the slide rail for supporting a third lumbar vertebra of a driver. A second air pillow provided in a recess between the seat seat surface and the seat back to support the sacrum and coccyx of the driver. 2. A pressure sensor provided on the back side of at least one of the air pillows, an air pump, and an ON / OFF signal output from the pressure sensor to control the air pump to supply air at a constant pressure to each air pillow. The operation seat according to claim 1, further comprising: a control circuit that operates.