JPH0536739Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a variable side support device for an automobile seat.

<Conventional technology> In order to prevent the seated person from becoming in an unstable sitting position due to the sideways movement of the vehicle while the vehicle is running, the side port of the seat is displaced toward the seated person in accordance with the lateral acceleration of the vehicle to improve the holdability. Seats with increasing side port variable devices are known.

The structure of the conventionally known side port variable device is the third one.
As shown in the figure, side ports 2a and 2b are provided on the left and right sides of the seat bag 1 and are rotatable in the left and right direction about fixed rotation centers 3a and 3b, and the left and right side ports 2a and 2b are connected by a link 4. , an actuator 5 is coupled to one side support 2b, and a controller (not shown) detects the lateral acceleration of the vehicle and operates the actuator 5 to rotate one side support 2b left and right. This is a mechanism in which the other side support 2a is rotated left and right in conjunction with the movement of the other side support 2a by the link 4.

<Problems to be solved by the invention> The conventional device described above has the following problems. Left and right side supports 2a and 2b at the same time
Since the actuator 5 is operated by a single actuator 5 (small motor), a complicated link mechanism is required and a large driving force is required, and since the actuator 5 cannot be made large due to space considerations, a large driving force is obtained by the reduction ratio. Therefore, the operational response is deteriorated.

Further, the left and right side supports 2a and 2b operate simultaneously and support the occupant's body from both sides, giving the occupant a feeling of being cramped.

Furthermore, since the operating loci of the side ports 2a, 2b are fixed rotation centers 3a, 3b, the heights of the side ports 2a, 2b change only slightly during operation, and sufficient holding performance cannot be obtained.

<Means for Solving the Problems> The present invention provides a side port variable device that solves the above-mentioned conventional problems, and its characteristic configuration is that the axis line parallel to the cushion surface of the seat back or seat cushion The first information section of
a second guide part having an outwardly inclined axis facing the cushion surface at both ends of the first guide part, and a guide rail which is bent and fixed to the seat frame; a pair of left and right guide plates guided by the guide plates, one end of which is pivotally connected to each of the guide plates so as to be able to swing in the left and right direction, and which slides into contact with a second guide portion of the guide rail so that a cushion is provided when the guide plates move backward; a side support that moves toward the outside of the seat while retreating from the cushion surface, and a side support that moves toward the inside of the seat while moving forward relative to the cushion surface when the guide plate moves forward; a return spring that always positions the guide plate at the rearward end; and an actuator. a push rod that moves left and right on an axis parallel to the first guide portion of the guide rail and moves the guide plate forward; and a push rod that operates the actuator in response to lateral acceleration of a running vehicle to move the push rod left or right. It consists of a controller that moves the right axis.

<Function> With the above configuration, the push rod pivots to the left or right based on the detection signal of the lateral acceleration of a running car, and moves the guide plate of the side support on the side that should hold the body forward in accordance with the lateral acceleration. The side support is moved toward the inner side of the seat, that is, toward the body of the seated person while causing the side support to protrude forward with respect to the cushion surface along the second guide portion of the guide rail. At this time, the other side port is displaced toward the outside of the seat, and maintains its original position in which it is displaced rearward.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. In FIGS. 1 and 2, reference numeral 10 denotes a guide rail, which is fixed to a seat back frame 12. As shown in FIG. This guide rail 10 has a first guide part 10a whose axis is parallel to the cushion surface 11 of the seat bag, and a second guide part 10b whose axis is inclined outward toward the cushion surface 11 at both ends of the first guide part 10a. It is bent.

A pair of left and right guide plates 13 are guided by the first guide portion 10a of the guide rail 10 so as to be movable forward and backward in the left and right direction, and a side support 14 is attached to each guide plate 13 so as to be swingable in the left and right direction by a pin 15. It is pivoted. The side support 14 is always guided in sliding contact with the second guide portion 10b of the guide rail 10.

16 is a gear box fixedly installed in the center of the seat back in the left and right direction;
A push rod 17 is inserted and held in 6 so as to be axially movable. This push rod 17 has an axis parallel to the axis of the first guide portion 10a of the guide rail 10, and its tip pushes the guide plate 13 forward by moving along the left and right axis.

The left-right axis movement mechanism of the push rod 17 is as follows:
A rack 18 is provided on the push rod 17, a pinion 19 that meshes with the rack 18 is rotatably supported within the gearbox 16, and the pinion 19 and the rotary solenoid 20 are connected by a connecting cable 21. Note that the rotary solenoid 20 may be directly connected to the pinion 19, or a small motor may be directly connected to the pinion 19, and the drive mechanism is not limited to the illustrated example.

Further, stopper sleeves 22 are fixed to both ends of the gear box 16 where the push rod 17 retracts, and a return spring 23 is interposed between both ends of the gear box 16 and the guide plate 13 to pull the guide plate 13 in the backward direction. , the guide plate 13 is brought into contact with the end of the stopper sleeve 22 to regulate the original position of the backward end of the guide plate 13.

In FIG. 1, 24 is a lateral acceleration sensor of the automobile, 25 is a computer, and 26 is a control switch. The operation of the rotary solenoid 20 is controlled by a command signal from a computer 25.

Next, the operation of the present invention will be explained with reference to FIG. In FIG. 2, the left side support 14 is in an activated state, and the right side support 14 is in an activated state.
remains in its original position. This state occurs when the vehicle sways to the right. That is, the operating conditions are set by the control switch 26. The setting contents are large and small lateral acceleration. The computer 25 compares and calculates the operating conditions with the input signal from the lateral acceleration sensor 24 and rotates the rotary solenoid 20 to the left or right.
The push rod 17 is pivoted to the left or right. In the case of FIG. 2, the push rod 17 is pivoted to the left in the figure. As a result, the guide plate 13, which is normally in contact with the stopper sleeve 22 due to the tensile force of the return spring 23, is pushed by the push rod 17 and moved forward. ．． Due to this forward movement of the guide plate 13, the side port 14 is moved to the guide rail 1.
0, the front end of the side support 14 protrudes forward by an amount A from the original position and is displaced by an amount B toward the inside of the seat. The amount of protrusion in the front direction A and the amount of displacement in the inward direction B are automatically controlled according to the lateral acceleration, realizing optimal holdability according to the lateral acceleration.

As shown on the right side of FIG. 2, the side support 14 on the opposite side of the operating side support 14 has the guide plate 13 located at the rearward end and maintains its original position, but the push rod 17 is By pivoting to the right in FIG. 2, the same operation as described above is performed and the left side of the occupant's body is held.

Further, although the above description is based on the side support of a seat bag, the present device can also be applied to the side support of a seat cushion.

<Effects of the invention> As described above, the present invention has the following special effects.

When the vehicle is stopped or running at steady speed, the height of the side supports on both sides, i.e., the amount of protrusion from the cushion surface, is low and they remain in their original position, expanding outward, so they do not impede the ease of getting in and out of the vehicle or the degree of freedom of the body. .

In addition, since the rising angle and height of the side support change simultaneously, a large hole property can be obtained.
Since this also operates instantly, it holds the body without delaying lateral acceleration and maintains a stable sitting posture.

Furthermore, since only one of the left and right side supports that requires holding is activated, there is no cramped feeling caused by conventional systems that operate on both sides, and the system can accommodate the body shape of the occupant.

[Brief explanation of the drawing]

Figure 1 is a front view of the present invention, Figure 2 is Figure 1-
FIG. 3 is a structural diagram of the conventional device. DESCRIPTION OF SYMBOLS 10... Guide rail, 10a... First guide part, 10b... Second guide part, 11... Cushion surface, 12... Seat back frame, 13... Guide plate, 14... Side support, 17...
...Push rod, 18...Rack, 19...Pinion, 20...Rotary solenoid, 22...
Stopper sleeve, 23... Return spring, 24... Lateral acceleration sensor, 25... Computer.

Claims (1)

[Claims for Utility Model Registration] A first guide portion having an axis parallel to the cushion surface of the seat bag or seat cushion;
a second guide portion having an outwardly inclined axis facing the cushion surface at both ends of the guide rail, and a guide rail fixed to the seat frame; a pair of left and right guide plates, one end of which is pivotally connected to each of the guide plates so as to be able to swing in the left-right direction; A side support that moves toward the outside of the seat while moving backward, and a side support that moves toward the inside of the seat while moving forward relative to the cushion surface when the guide plate moves forward, a return spring that always positions the guide plate at the backward end, and an actuator. a push rod that moves on an axis parallel to the first guide portion of the guide rail to move the guide plate forward; and a push rod that moves the push rod on the left or right axis by actuating the actuator in response to the lateral acceleration of a running vehicle. A seat side support variable device consisting of a controller and a controller.