JPH10211837A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease a temperature of a seat surface by a simple device without so enlarging a skeleton of the seat device. SOLUTION: When the average outside air temperature detected by an outside temperature sensor 7 is higher than a prescribed temperature, whether an occupant is seated or not in a seat part is decided. This decision result is YES, when an ignition switch is decided to be off, whether a door is closed or not is decided by a door opening/closing switch 10. When this decision result is YES, a back rest part 4 is turned to a vehicle most forward side. In this way, by shielding sunlight incident in a seat part 3 by the back rest part 4, without so enlarging a skeleton of a seat, a rise of surface temperature in a seating part by sunlight in the summer season can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a vehicle seat for preventing the surface of the seat from becoming high temperature due to solar radiation.

[0002]

2. Description of the Related Art Conventionally, if a vehicle is parked for a long time under a hot sunshine, especially in summer when the temperature of the vehicle is high, the seat of the vehicle becomes hot due to the sunshine. There is a problem of feeling very uncomfortable. Therefore, in Japanese Patent Application Laid-Open No. 5-277020, an air passage is provided inside the sheet, and an air flow is generated in the air passage by a cooling fan to cool the sheet.

[0003]

However, in the above-mentioned conventional apparatus, the size of the seat apparatus is increased by providing an air passage inside the seat and further providing a cooling fan.
There is a problem that mounting is practically difficult. Therefore, an object of the present invention is to reduce the temperature of the sheet surface with a simple device without increasing the size of the sheet device so much.

[0004]

A vehicle seat has a seating portion and a backrest portion, and the backrest portion is automatically inclined in the front-rear direction of the vehicle by, for example, an electric drive means. There is something. The inventor of the present invention can block the solar radiation hitting the seating portion by tilting the backrest portion, thereby easily reducing the surface temperature of the seating portion without increasing the size of the seat device so much. We paid attention to the point.

In view of the above, according to the present invention, a seat (2) provided in a vehicle interior and having a seating portion (3) and a backrest (4), and a backrest (4). (5, 6) for controlling the vehicle to fall in the front-rear direction of the vehicle, temperature detecting means (7) capable of detecting the temperature outside the vehicle cabin, and a seating portion (3) of the seat portion (2). Occupant determination means for determining whether or not a person is sitting (10, 50)
And the control device (6) includes occupant determination means (10,
When it is determined in 50) that the occupant is not sitting on the seating portion (3) and the temperature outside the vehicle compartment is higher than the first predetermined temperature (Tout2), the backrest portion (4) is tilted forward for a predetermined time. It is characterized by.

Accordingly, when the occupant is not sitting and the temperature outside the vehicle compartment is higher than the first predetermined temperature, it is considered that the surface temperature of the seating portion is likely to rise due to the solar radiation, and the backrest portion is tilted forward by the control device. . As a result, the solar radiation incident on the seating portion can be blocked by the backrest portion, so that the increase in the surface temperature of the seating portion due to the solar radiation can be reduced without increasing the size of the vehicle seat.

Further, according to the invention of claim 2, there is provided solar radiation detecting means (8) for detecting the amount of solar radiation entering the vehicle interior,
The control device (6) determines that the temperature outside the vehicle compartment is equal to the first predetermined temperature (Tou
t2) When the temperature is higher than the second predetermined temperature (Tout1) and the amount of solar radiation is larger than the predetermined amount of solar radiation (Qth), the backrest (4) is tilted forward for a predetermined time.

Here, the temperature outside the vehicle compartment is not so high, and is lower than the first predetermined temperature at a second predetermined temperature (for example, 20 ° C.).
However, if the amount of solar radiation is larger than the predetermined amount of solar radiation, the surface temperature of the seating portion may increase. Therefore, according to the second aspect of the present invention, even when the temperature outside the vehicle compartment is not so high, when the amount of solar radiation is larger than the predetermined amount of solar radiation, the backrest portion is tilted forward of the vehicle to thereby reduce the insolation. The rise in the surface temperature of the seat can be reduced.

Further, according to the third aspect of the present invention, there is provided a solar radiation detecting means (8) for detecting the amount of solar radiation entering the vehicle interior,
The controller (6) is characterized in that when the amount of solar radiation is larger than the predetermined amount of solar radiation (Qth), the backrest (4) is tilted forward of the vehicle for a predetermined time. As a result, the surface temperature of the seating portion easily rises due to the solar radiation when the solar radiation is greater than the predetermined amount of solar radiation, but the surface temperature of the seating portion is reliably reduced by tilting the backrest forward when the solar radiation is large. it can.

[0010] Here, claim 3 is based on claim 2.
As described in the invention, when the temperature outside the vehicle compartment is not so high, and when the amount of solar radiation is greater than a predetermined amount of solar radiation, the concept includes tilting the backrest forward. Claim 4
In the described invention, the control device (6) controls the occupant determination means (1).
When the occupant does not sit on the seating portion (3) at a predetermined time (T) at (0, 50), the backrest portion (4) is tilted forward in the vehicle.

As a result, when the occupant is completely separated from the vehicle and the occupant does not re-enter the vehicle in a short time, the backrest portion falls down toward the front of the vehicle. Therefore, it is possible to prevent the backrest portion from falling down when the occupant separates from the seating portion, and it is possible to improve the seating ability when the occupant again sits on the seating portion in a short time.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration diagram of a vehicle seat 1 according to the present embodiment. The seat portion 2 is for a driver's seat, and includes a seating portion 3 on which an occupant sits, and the seating portion 3.
And a backrest portion 4 on which the occupant rests. The seat portion 1 in the present embodiment can be moved in the vehicle front-rear direction in the figure by, for example, a servomotor as a driving unit. The seat 1 is moved to an arbitrary position by operating a switch (not shown) provided in the vehicle interior.

The backrest 4 is configured to fall in the vehicle front-rear direction in FIG. The backrest portion 4 is configured to fall to an arbitrary position by operating a switch (not shown) provided in the vehicle interior. In the present embodiment, the backrest 4
In addition to operating the switch, the control device 6 automatically falls down to the front of the vehicle when the surface temperature of the seating portion 3 rises due to solar radiation or the like.

First, the control device 6 will be described.
The control device 6 is a well-known computer means, and has a RAM for temporarily storing data, a ROM for storing a predetermined program, and the like. In the present embodiment, the control device 6 includes a timer function and the backrest unit 4.
It has a function of detecting the moving position of. The control device 6 includes, as input terminals, an outside air temperature sensor 7 as a means for detecting the temperature outside the vehicle compartment, a solar radiation sensor 8 as a means for detecting the amount of solar radiation entering the vehicle interior, and an ignition switch (IG) 9 of the vehicle. It is connected.

Further, an occupant sensor 10 and a door open / close switch 11 are connected to the control device 6 as input terminals. The occupant sensor 10 serves as a means for determining whether or not an occupant is sitting on the seat 3. For example, in the present embodiment, the occupant sensor 10 is provided in the seating portion 3, and when the occupant is sitting on the seating portion 3, the electric contact is turned on by the load by the occupant, and the occupant is not seated on the seating portion 3. The electric contact type in which the electric contact is separated and turned off is used. Also,
In this embodiment, the door open / close switch 10 detects opening / closing of a door (not shown) on the driver's seat side.

Next, the control of the seat section 2 of the control device 6 will be described with reference to FIGS. First, FIG. 2 is a flowchart showing the control contents of the seat unit. Note that the control cycle of this flowchart is 4 seconds. First, in step S20, a season is determined. That is, since the surface of the seating portion 3 becomes high in temperature due to the solar radiation especially in summer when the outside air temperature is high, it is necessary to make this determination.

The contents of step S20 will be described below with reference to the routine of FIG. In step S21, it is determined whether or not the average outside temperature detected by the outside temperature sensor 7 is higher than a predetermined temperature Tout1 (25 ° C. in the present embodiment). here,
In the present embodiment, the outside air temperature sensor 7 detects the outside air temperature in a cycle of 0.25 seconds, and the average outside air temperature is an average of the detection values (16 times) of the outside air sensor 7 for 4 seconds. If “YES” is determined in the step S21, a step S23 is performed.
And the summer is determined.

If the decision result in the step S21 is NO, the process proceeds to a step S24, in which it is determined whether or not the average outside temperature is lower than a predetermined temperature Tout2 (20 ° C. in the present embodiment). Then, the determination result in step S24 is YES
If the average outside temperature is lower than 20 ° C., step S2
Proceed to 5 to determine winter. If the decision result in the step S24 is NO and the average outside air temperature is 20 to 25 ° C., the process proceeds to a step S26. In step S26, it is determined whether the amount of solar radiation detected by the solar radiation sensor 8 is higher than a predetermined value Qth. The predetermined value Qth is set to 500 W / m ² in the present embodiment.

Then, if the decision result in the step S26 is YES, and the amount of solar radiation is smaller than the predetermined value Qth, the process proceeds to a step S27, where it is determined that the period is an intermediate period. On the other hand, when it is determined in step S26 that the amount of solar radiation is higher than the predetermined value Qth, it is considered that the outside temperature is not so high but the amount of solar radiation is large, and that the surface temperature of the seating portion 3 is increased by the solar radiation. It is determined to be summer.

Next, in step S30, the above-mentioned step S
It is determined whether the season determined at 20 is summer. If the result of this determination is NO, that is, in the intermediate period and the winter period, the process proceeds to step S100, where the seat portion 2 is set to the normal position, and the servomotor 5 is stopped. On the other hand, if the result of the determination in step S30 is YES and it is determined that the summer is in progress, the process proceeds to step S40, and the timer is started (started). Subsequently, the process proceeds to step S50 to determine whether or not the seating sensor 10 is off (off), that is,
It is determined whether or not the occupant is sitting.

If the decision result in the step S50 is YES, that is, if it is determined that the occupant is not sitting on the seating section 3, the process proceeds to a step S60. If the result of the determination in step S50 is NO, that is, if it is determined that the occupant is sitting on the seat 3, the process proceeds to step S100. Next, step S60
Then, it is determined whether or not the ignition switch 9 is turned on. Then, the determination result in step S60 is N
When the ignition switch 9 is turned on in O, the process proceeds to step S100.

That is, when the answer to the determination of step S60 is NO, the occupant is separated from the seating section 3 because the ignition switch 9 is turned on, but when the occupant returns to the seating section 3 in a short time. Assuming that the process proceeds to step S100, the backrest unit 4 is held as a normal position. On the other hand, if the decision result in the step S60 is YES, and the ignition switch 9 is off, it is determined that the occupant has stopped the vehicle, and the process proceeds to a step S70 to determine whether or not the door is closed by the door open / close switch 10. Is determined.
If it is determined in step S70 that the door is open, it is determined that the occupant is getting on or off the vehicle, and the process proceeds to step S100. On the other hand, if it is determined in step S70 that the door is open, the process proceeds to step S80.

In step S80, the above-mentioned step S40
The timer started at is a predetermined time T (1 in this example).
It is determined whether or not (minute) has elapsed. If it is determined that the predetermined time T has not elapsed, the process returns to step S50. Then, if it is determined in step S40 that the timer started has passed the predetermined time T, the process proceeds to step S90, in which the backrest unit 4 is moved down to the front of the vehicle. That is, in step S80, the above step S80
If the occupant is not sitting on the seat 3 at 50 to 70 and the ignition switch 9 is turned off and the door is closed for more than one minute, the occupant is completely separated from the vehicle (the seat 3). Therefore, it is assumed that the occupant will not get into the vehicle again in a short time, and the seat back is moved down so that the backrest 4 is moved forward to the front of the vehicle.

Then, for example, when the door is opened thereafter and the process proceeds to step S100, the seat 3 is returned to the normal position.
Here, the normal position is a state before the backrest unit 4 is depressed in step S90, and is a position of the backrest unit 4 that is operated by the occupant using the switch. Accordingly, the solar radiation incident on the seating portion 3 is blocked by the backrest portion 4, so that the rise in the surface temperature of the seating portion 3 due to the solar radiation in summer can be reduced without increasing the size of the seat so much. When the backrest 4 is returned, the control device 6 automatically returns to the state before the backrest 4 is tilted, so that when the occupant sits on the seating section 3 again, a good sitting state is obtained.

Further, in the present embodiment, when the amount of solar radiation is higher than the predetermined value Qth even in the intermediate period, it is regarded as summer, and the rise in the surface temperature of the seating portion 3 due to the solar radiation can be reduced. Further, as described above, the occupant is not seated on the seating portion 3, the ignition switch 9 is turned off, and the state in which the doors are closed further is such that the backrest portion 4 is turned down only after a predetermined time has elapsed, It is completely separated from the vehicle, so that the backrest can be prevented from falling down when the occupant separates from the seating portion, and the seating ability when the occupant again sits on the seating portion in a short time can be improved.

(Other Embodiments) In the above embodiment, the seating sensor 11 is of the electric contact type. However, an infrared sensor may be used, or the seating state of the occupant is detected when the seat belt is detached. You may do it. Further, in each of the above embodiments, the backrest 4 is provided in accordance with the outside air temperature and the amount of solar radiation.
The seating portion 3 may be moved forward of the vehicle when the backrest portion 4 is further tilted. This makes it more difficult for the solar radiation to hit the seating portion 3 and the handle (not shown) at the backrest portion 4.
It can also be used to block out the solar radiation.

In each of the above embodiments, the seat 3 for the driver's seat has been described. However, the present invention can be applied to the seat on the passenger seat side and the seat on the rear seat side. Also,
In each of the above embodiments, the season is determined based on the outside air temperature, but may be determined using a date or the like.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vehicle seat according to an embodiment.

FIG. 2 is a flowchart showing control contents of a sheet unit 2 in the embodiment.

FIG. 3 is a flowchart showing control contents of a sheet unit 2 in the embodiment.

[Explanation of symbols]

Reference numeral 3 represents a seating portion, 4 represents a backrest portion, 2 represents a seat portion, 6 represents a control device, 7 represents an outside air sensor, 8 represents a solar radiation sensor, and 10 represents a sitting sensor.

Claims (4)

[Claims] 1. A seat portion (2) provided in a vehicle interior and having a seating portion (3) and a backrest portion (4), and control for controlling the backrest portion (4) so as to fall down in the front-rear direction of the vehicle. A device (5, 6); a temperature detecting means (7) capable of detecting the temperature outside the vehicle cabin; and an occupant determination for determining whether or not an occupant is sitting on a seating portion (3) of the seat portion (2). Means (10, 50), wherein the control device (5, 6) includes the seating portion (3) in the occupant determination means (10, 50).
When the occupant is determined not to be sitting on the vehicle and the temperature outside the vehicle compartment is higher than a first predetermined temperature (Tout2), the backrest (4) is tilted forward for a predetermined time. . 2. A solar radiation detecting means (8) for detecting an amount of solar radiation entering the vehicle interior, wherein the control device (6) is configured such that a temperature outside the vehicle interior is lower than the first predetermined temperature (Tout2). The vehicle according to claim 1, wherein the backrest (4) is tilted forward for a predetermined time when the temperature is higher than a second predetermined temperature (Tout1) and the amount of solar radiation is larger than a predetermined amount of solar radiation (Qth). Sheet. 3. A solar radiation detecting means (8) for detecting an amount of solar radiation incident on the vehicle interior, wherein the control device (6) is configured to: when the amount of solar radiation is larger than a predetermined amount of solar radiation (Qth), The vehicle seat according to claim 1, wherein the backrest (4) is tilted forward of the vehicle for a predetermined time. 4. The control device (6), wherein the occupant determination means (10, 50) controls the seat portion (3).
The vehicle seat according to any one of claims 1 to 3, wherein after a predetermined time (T) has elapsed without the occupant sitting on the vehicle, the backrest (4) is tilted forward of the vehicle.