JP2007038848A - Seat control device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat control device for a vehicle, capable of preventing falling of an object from a front passenger seat without requiring a driver to make special operation when the object is placed on a seat cushion of the passenger seat. <P>SOLUTION: A load sensor 2 is provided to detect if an object is placed on the seat cushion 7 or not. A seat position control means is provided to raise the forward end side of the seat cushion 7 when an object is detected on the seat cushion 7 by the load sensor 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat control device, and more particularly to a vehicle seat control device that performs vertical position control of a front end portion of a seat cushion of a passenger seat.

  When the vehicle is run with the luggage placed on the passenger seat, the luggage rolls forward each time the brake is applied, and in some cases, the luggage may fall to the front of the passenger seat. Therefore, a vehicle seat control device having a mechanism for preventing the luggage from falling from the passenger seat has been proposed (for example, see Patent Document 1).

In the vehicle seat control device of Patent Document 1, the seat cushion is separated into the main cushion body and the front cushion body arranged at the front portion of the main cushion body, and is provided at the front end of the front cushion body. When the knob is operated, the front cushion body moves in the vertical direction, and the vertical position of the front cushion body can be adjusted. Then, by adjusting the front cushion body to a position above the main cushion body, a step is formed on the front side of the seat cushion, and as a result, luggage such as bags placed on the main cushion body is helped during braking. It can prevent falling to the front of the seat.
JP-A-2005-46529

  However, in the above conventional technique, in order to adjust the front cushion body to a position higher than the main cushion body, after placing the luggage on the seat cushion of the passenger seat, the driver tilts himself / herself toward the passenger seat side. There is a problem that the knob at the front end of the front cushion body must be manually operated, and the knob operation is very troublesome.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat control device capable of preventing a luggage from falling from the passenger seat even when the driver does not perform a special operation when placing the luggage on the seat cushion of the passenger seat. It is to provide.

  In order to solve the above problems, the present invention has a load detection means for detecting whether a load is placed on the seat cushion, and when the load is detected on the seat cushion by the load detection means, A seat position control means for raising the front end portion side of the seat cushion is provided.

  If comprised in this way, for example, when a driver puts a load on the seat cushion of the passenger seat, this is detected on the seat side, and the front end side of the seat cushion is automatically raised. As a result, the load on the seat cushion is difficult to roll, and when the brake is applied, the load on the seat cushion can be prevented from falling to the front of the passenger seat.

  According to the present invention, when a load is placed on the seat cushion of the passenger seat, the front end side of the seat cushion is raised, and the front end height of the seat cushion is automatically adjusted. Without this, it is possible to prevent the luggage from falling from the passenger seat.

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

  FIG. 1 is a block diagram of a vehicle seat control apparatus according to the present invention. As shown in FIG. 1, an electronic control unit (ECU) 1 is provided, and a load sensor 2, a seat position adjustment unit 3, and a speaker 4 are electrically connected to the electronic control unit 1. Yes. A cancel switch 5 is connected to the electronic control device 1. Here, the load sensor 2 constitutes a load detection means, and the electronic control device 1 and the seat position adjustment unit 3 constitute a seat position control means.

  FIG. 2 shows a state where the electronic control device 1, the load sensor 2, the seat position adjustment unit 3, the speaker 4, and the cancel switch 5 are installed in the passenger seat 6. In FIG. 2, the sheet driving source 10 and the sheet lift mechanism 11 constitute the sheet position adjusting unit 3, which will be described later.

  The passenger seat 6 generally includes a seat cushion 7, a seat back 8 provided at the rear end portion of the seat cushion 7, and a headrest 9 fixed to the upper end portion of the seat back 8. The lower part in the seat back 8 is provided with the electronic control unit 1 and a seat drive source (a part of the seat position adjusting unit 3: a motor) 10 for raising the front end side of the seat cushion 7. A cancel switch 5 is provided at the center of the side surface of 8. A load sensor 2 is provided in the upper part of the seat cushion 7. Further, a speaker 4 is provided in an instrument panel (not shown) in front of the passenger seat 6. The rear end portion of the seat cushion 7 and the lower end portion of the seat back 8 are connected by a hinge mechanism (not shown) so that the inclination angle of the seat back 8 can be arbitrarily changed.

  Further, at the bottom of the seat cushion 7, seat lift mechanisms 11 are provided at four places on the left and right front and rear as a part of the seat position adjustment unit 3. 3 and 4, the seat lift mechanism 11 includes an attachment member 11A attached to the bottom of the seat cushion 7, an attachment member 11B attached to the seat pedestal portion 12, an attachment member 11A, and an attachment member 11B. And a connecting member 11C. Note that one end of the connecting member 11C is swingably attached to the front portion of the attachment member 11A by a pin 11D and the other end is attached to the rear portion of the attachment member 11B by a pin 11E.

  Next, the operation of the vehicle seat control apparatus having the above configuration will be described based on the flowchart shown in FIG.

  First, the electronic control unit 1 determines whether or not the ignition of the vehicle is turned on by the driver (step S1). When the ignition of the vehicle is not turned on, that is, in the OFF state, the seat cushion 7 is returned to the home position (step S11).

  In step S1, when it is determined that the ignition is turned on, the electronic control unit 1 next determines whether or not the cancel switch 5 is in the OFF state (step S2). If the cancel switch 5 is not in the OFF state, that is, if it is in the ON state, the seat cushion 7 is returned to the home position (step S11).

  In step S2, when the cancel switch 5 is in an OFF state, the load sensor 2 detects a load (pressure) applied to the seat surface portion of the seat cushion 7 (step S3).

  The electronic control unit 1 takes in the detection signal from the load sensor 2 and measures the load distribution on the surface of the seat cushion 7, converts the measured load into an electric signal, replaces the load parameter with various parameters, and loads the load distribution. The pattern is calculated. As a result, it is determined whether the seat cushion 7 is empty without any occupant seating or luggage loading (step S4), and whether the occupant is seated on the seat cushion 7 or a child seat is mounted. It is determined whether the item is loaded or a load is loaded (steps S5 to S7).

  If it is determined in step S4 that the seat cushion 7 is empty, if it is determined in step S5 that an occupant is seated, if it is determined in step S6 that a child seat is mounted, and if the luggage is determined in step S7 If it is determined that the seat cushion is not stacked, the seat cushion 7 is returned to the home position (step S11).

  If it is determined in step S7 that a load is loaded on the seat cushion 7, the load sensor 2 detects the load change amount of the seat cushion 7 (step S8), and the weight of the loaded load, and The shape of the bottom surface is determined, and the determination result is input to the electronic control device 1 as an electrical signal.

  Upon receiving the electrical signal, the electronic control unit 1 sends an alarm signal for the seat variable adjustment start signal to the speaker 4 and transmits the signal from the speaker 4 (step S9).

  Then, the electronic control unit 1 sends a drive signal to the drive source 10 of the seat position adjustment unit 3 to drive the drive source 10 and tilt the entire seat cushion 7 so that the front end side of the seat cushion 7 is raised (step). S10). At this time, as shown in FIG. 3, by rotating the seat cushion 7 around the rear side of the seat cushion 7, the entire seat cushion 7 is tilted as shown by the arrow A, and the seat back 8 is moved by the arrow B. Tilt backward as shown. Thereby, it is possible to prevent the bag 13 (luggage) placed on the seat cushion 7 from rolling forward during braking. When the front end portion of the seat cushion 7 is raised, the amount of rise of the front end portion of the seat cushion 7 is increased in proportion to the weight of the load loaded on the seat cushion 7.

  6 to 9 show examples of load distribution on the surface of the seat cushion 7. Load sensors 2A and 2B are installed at two locations on the front side of the seat cushion 7, and load sensors 2C and 2D are installed at two locations on the rear side.

  Then, the load detected by the load sensors 2A, 2B and 2C, 2D is compared with the first threshold value and a second threshold value larger than the first threshold value. At this time, when the detected load is smaller than the first threshold (less than the first threshold), the load is “small”, and when the detected load is larger than the first threshold and smaller than the second threshold (first threshold). A case where the load is less than the second threshold value is determined as a “medium” load, and a case where the load is greater than the second threshold value (when the value is equal to or greater than the second threshold value) is determined as a “large” load.

  As shown in FIG. 6, when the load detected by the load sensors 2A and 2B is “small” and the load detected by the load sensors 2C and 2D is also “small”, the electronic control unit 1 uses the seat cushion 7 as the occupant. It is determined that the vehicle is in an empty state without seating or loading.

  As shown in FIG. 7, when the load detected by the load sensors 2A and 2B is “medium” and the load detected by the load sensors 2C and 2D is “large”, the electronic control unit 1 is placed on the seat cushion 7. It is determined that the occupant is seated.

  As shown in FIG. 8, when the load detected by the load sensors 2A and 2B is “medium” and the load detected by the load sensors 2C and 2D is also “medium”, the electronic control unit 1 places the child seat on the seat cushion 7. Is determined to be installed.

  As shown in FIG. 9, when the load detected by the load sensors 2A and 2B is “small” and the load detected by the load sensors 2C and 2D is “large”, the electronic control unit 1 is placed on the seat cushion 7. It is determined that the load is loaded.

  According to this embodiment, when a load is placed on the seat cushion 7 of the passenger seat 6, the front end side of the seat cushion 7 is raised and the front end height of the seat cushion 7 is automatically adjusted. It is possible to prevent the luggage from falling from the passenger seat 6 without performing any special operation.

  Further, it is not necessary to operate the knob at the front end portion of the passenger seat to raise the front cushion body or to stop the elevation as in the prior art, which contributes to improved operability.

  Further, in the conventional passenger seat, the seat cushion is divided into the main cushion body and the front cushion body, and the appearance is not good, and the sitting comfort is also bad, but in this embodiment, the seat cushion 7 is not divided. It looks good and does not make you feel uncomfortable.

  Furthermore, since the cancel switch 5 is provided, when it is not desired to raise the front end side of the seat cushion 7, it is only necessary to operate the cancel switch 5 in an ON state, and a control system with excellent operability is provided. realizable.

  As mentioned above, although the Example of this invention has been explained in full detail with drawing, the said Example is only the illustration of this invention, and this invention is not limited only to the structure of the said Example. Needless to say, changes in design and the like within the scope of the present invention are included in the present invention. For example, three or more load sensors may be installed on the front side of the seat cushion 7 and three or more on the rear side. Furthermore, the vehicle seat control device of the present invention can be applied not only to the passenger seat but also to the rear seat.

1 is a block diagram of a vehicle seat control device according to the present invention. It is a figure which shows a mode that the electronic controller, the load sensor, the seat position adjustment part, the speaker, the cancel switch, etc. were installed in the passenger seat. It is a side view of a seat in which a vehicle seat control device according to the present invention is installed. It is a perspective view of a seat lift mechanism. It is a flowchart which shows operation | movement of the vehicle seat control apparatus which concerns on this invention. It is a figure explaining a mode when there is no passenger | crew's seating or luggage | loading etc. on a seat cushion based on the detection data of a load sensor. It is a figure explaining a mode that a crew member sits on a seat cushion based on detection data of a load sensor. It is a figure explaining a mode that a child seat is mounted on a seat cushion based on detection data of a load sensor. It is a figure explaining a mode that a load is loaded on a seat cushion based on detection data of a load sensor.

Explanation of symbols

1 Electronic control device (sheet position control means)
2 Load sensor (package detection means)
3 Sheet position adjustment unit (sheet position control means)
4 Speaker 5 Cancel Switch 6 Passenger Seat 7 Seat Cushion 8 Seat Back 10 Seat Drive Source 11 Seat Lift Mechanism

Claims (9)

  Seat position control for detecting whether or not a load is placed on the seat cushion, and when the load is detected on the seat cushion by the load detection means, the seat position control for raising the front end side of the seat cushion Means for providing a vehicle seat control apparatus. The luggage detection means is a load sensor that detects a load applied to the seat cushion,
The seat position control means determines whether or not a load is loaded on the seat cushion based on a detection signal from the load sensor, and determines that a load is loaded on the seat cushion. The vehicle seat control device according to claim 1, wherein the front end portion side of the seat cushion is raised.   The vehicular seat control device according to claim 2, wherein the seat position control means increases the rising amount of the front end portion of the seat cushion as the weight of the load loaded on the seat cushion increases.   The seat position control means calculates a load distribution applied to the seat cushion based on a detection signal from the load sensor, and performs the determination based on the calculation result. The vehicle seat control device described.   The seat position control means rotates the entire seat cushion around the rear side of the seat cushion, and raises the front end side of the seat cushion. The vehicle seat control device according to Item.   The seat position control means is provided with a cancel switch, and when the cancel switch is operated by a vehicle occupant, ascent of the seat cushion is prohibited. The vehicle seat control device described. The load sensors are installed at least at two locations on the front side and two locations on the rear side of the seat cushion,
The seat position control means compares the value of the detected load in each of the load sensors with a first threshold value and a second threshold value that is larger than the first threshold value, and two front side locations are the first threshold value. It is determined that the occupant is seated when the middle load is larger than the threshold value and smaller than the second threshold value, and the two rear side locations are large loads larger than the second threshold value. 3. The vehicle seat control according to claim 2, wherein when the two rear side portions have a small load smaller than the first threshold, it is determined that the vehicle is in an empty state in which no occupant is seated, no load is loaded, or the like. apparatus. The load sensors are installed at least at two locations on the front side and two locations on the rear side of the seat cushion,
The seat position control means compares the value of the detected load in each of the load sensors with a first threshold value and a second threshold value that is larger than the first threshold value. It is determined that the child seat is mounted when the intermediate load is larger than the first threshold and smaller than the second threshold, and the front side two places and the rear side two places are smaller than the first threshold value. 3. The vehicle seat control device according to claim 2, wherein when the load is small, it is determined that the vehicle is in an empty state in which no occupant is seated or no load is loaded. The load sensors are installed at least at two locations on the front side and two locations on the rear side of the seat cushion,
The seat position control means compares the value of the detected load in each of the load sensors with a first threshold value and a second threshold value that is larger than the first threshold value, and two front side locations are the first threshold value. It is determined that the load is loaded when the load is smaller than the threshold and the rear two places are larger than the second threshold, and the front two places and the rear two places are the first 3. The vehicle seat control device according to claim 2, wherein when the load is smaller than a threshold value, the vehicle seat control device is determined to be in an empty state in which no occupant is seated, no load is loaded, or the like.

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