JP5978389B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat having a dynamic damper support structure.

There is a support structure for a dynamic damper of a seat mounted on a vehicle, for example, an automobile. Patent Document 1 proposes a dynamic damper disposed in the seat back in order to cancel the vibration (referred to as resonance) of the seat that occurs with the running vibration of the automobile.

Japanese Utility Model Publication No. 01-167828

By the way, in such a related technology, there is a risk that not only the weight of the dynamic damper but also the mounting bracket and the like increase the weight of the seat and increase the manufacturing cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat that can reduce the resonance of the seat that occurs in association with the traveling vibration of the vehicle, and is lightweight and inexpensive.

A vehicle seat according to an embodiment of the present invention is supported by a vehicle floor and has a seat cushion having a cross frame, a seat back that is supported by the seat cushion so as to be able to rotate back and forth, and has a reinforcing frame, and one end portion thereof. A wire supported by the cross frame of the seat cushion and rotatably supported at the other end by the reinforcing frame of the seat back.

   According to the above configuration, the resonance of the seat can be reduced by canceling the frequency at which the wire is easily felt by the occupant. Moreover, since the means is a wire, it can be made lightweight and inexpensive.

The vehicle seat further includes a reclining device that supports the seat cushion and the seat back so that the seat cushion and the seat back can freely rotate back and forth at a rotation center position, and the other end portion of the wire is the reinforcement frame at the rotation center position. It may be pivotally supported by the shaft.

According to the above configuration, the other end of the wire is pivotally supported by the reinforcing frame at the rotation center position of the reclining device, so that it does not hinder the rotation of the seat back in the front-rear direction.

The other end portion of the wire may be pivotally supported on the reinforcing frame via a ball joint.

According to the said structure, the said other end part can be rotatably supported by the said reinforcement frame via a ball joint.

The other end of the wire may be pivotally supported on the reinforcing frame via a hinge.

According to the above configuration, the other end can be pivotally supported on the reinforcing frame via the hinge.

FIG. 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view showing the framework of the seat of FIG. FIG. 3 is a perspective view showing a state in which the wire of FIG. 2 is disassembled. FIG. 4 is a partially broken front view showing the wire of FIGS. 2 and 3. FIG. 5 is a side view of the wire of FIG. FIG. 6 is a perspective view of a bracket that supports the wire shown in FIGS. 4 and 5. FIG. 7 is a front view of the wire of FIG. FIG. 8 is data showing the vibration sound with respect to the frequency of the vehicle seat according to the embodiment of the present invention in comparison with the related art.

The object of reducing the seat resonance caused by the traveling vibration of the vehicle and providing a lightweight and inexpensive vehicle seat is realized by the following configuration. That is, a vehicle seat is supported by a vehicle floor and has a cross cushion, a seat back that is supported by the seat cushion so as to be able to rotate back and forth, and has a reinforcing frame, and one end is the cross of the seat cushion. A wire supported by the frame and having the other end rotatably supported by the reinforcing frame of the seat back. .

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. A configuration of a seat according to an embodiment of the present invention, for example, a vehicle disposed in an automobile will be described. The symbols UP, LWR, LH, RH, FR, and RR in FIGS. 2 and 3 indicate the upward direction, the downward direction, the left direction, the right direction, the front direction, and the rear direction, respectively.

The vehicle seat 1 according to the present embodiment includes a seat cushion 2, a seat back 3, a headrest 4, a reclining device 8, a support device 5, a safety belt buckle 6, a wire 14, a bracket 19, and a bracket 20. The seat cushion 2 is supported on the floor of an automobile (not shown). The seat back 3 supports an occupant's back (not shown). The headrest 4 is supported on the top of the front surface 3a of the seat back 3 and can hold the head of a passenger (not shown) from the rear. The reclining device 8 is provided on one side of the seat cushion 2 (right side in the present embodiment), and supports the seat cushion 2 and the seat back 3 so as to be rotatable forward and backward at the rotation center position. The support device 5 is disposed on the other side (left side in the present embodiment) of the seat cushion 2, and is supported along the side 3b of the seat back 3, and a rotation shaft capable of rotatably holding the arm 7. Part 9. The rotation shaft portion 9 is at the same position as the reclining device 8 and the rotation center axis. That is, the rotation axis center of the rotation shaft portion 9 coincides with the rotation center position of the seat cushion 2 and the seat back 3. The safety belt buckle 6 is supported by the seat cushion 2. The safety belt buckle 6 includes an arm 6a supported on the seat cushion 2 by a fastener 6b. The wire 14 is for reducing the resonance of the vehicle seat 1.

Slide devices 22 and 23 that enable the seat cushion 2 to move back and forth are supported on the floor of an automobile (not shown). The seat cushion 2 includes a cross frame 21 and a back frame 13 that bridge between the slide devices 22 and 23.

The seat back 3 includes a left and right main frame 10 and a first reinforcing frame 11 and a second reinforcing frame 12 which are reinforcing frames bridged between the left and right main frames 10.

An upper end portion 19 b of the bracket 19 is supported by welding on the cross frame 21 of the seat cushion 2. A fastener 16 a protruding from one end 16 of the wire 14 is inserted into a through hole 19 a formed in the lower end 19 c of the bracket 19, and supported by the lower end 19 c of the bracket 19 by a nut 18.

An iron plate bracket 20 is supported by welding on the second reinforcing frame 12 supported by the seat back 3. A fastener 17a protruding from the other end 17 of the wire 14 is engaged with a notch 20a formed in the bracket 20, and supported by the bracket 20 with a nut indicated by a broken line in FIG.

The wire 14 has a round bar-like iron body 15 formed in an L shape. One end 16 and the other end 17 of the main body 15 are rotatably supported by the bracket 19 and the bracket 20 via the ball joint portion 30.

The other end 17 of the wire 14 supported by the bracket 20 is a position that matches the rotational center position of the reclining device 8. That is, the rotational axis center of the fastener 17 a of the wire 14 coincides with the rotational center position of the seat cushion 2 and the seat back 3.

As shown in FIGS. 4 and 5, ball joint portions 30 and 30 formed at both end portions 16 and 17 of the wire 14 are spherical ball pins 17b protruding from the fastening portions 16a and 17a (on the one end portion 16 side). The ball pin is omitted from the illustration), and a spherical recess 17c that holds the ball pin 17b in a freely rollable manner (the spherical recess on the one end 16 side is omitted from the illustration). The fastening portions 16a and 17a have different directions by 90 degrees. Since such a ball joint structure is well known, a detailed description is omitted.

The one end 16 and the other end 17 of the main body 15 of the wire 14 may be fixed to the cross frame 21 of the seat cushion 2 via a hinge. Further, the one end portion 16 of the main body 15 of the wire 14 may be directly fixed to the cross frame 21 of the seat cushion 2 with a fastener. In this case, the one end portion 16 is directly fixed to the cross frame 21, for example, so that the weight and cost can be reduced as compared with the case where the one end portion 16 is fixed via the ball joint portion 30.

The operation of the embodiment of the present invention having the above configuration will be described below.

A vehicle seat 1 according to this embodiment includes a seat cushion 2 supported on a floor of an automobile (not shown) and a seat back 3 supported on the seat cushion 2 via a reclining device 8 so as to be able to rotate back and forth. Further, one end portion 16 of the wire 14 is supported on the cross frame 21 of the seat cushion 2, and the other end portion 17 of the wire 14 is rotatable about the reinforcing frame 12 supported on the seat back 3 via the ball joint portion 30. It is supported. Thereby, the resonance of the vehicle seat 1 can be reduced by canceling the frequency that the wire 14 can easily feel for the passenger (not shown). Moreover, since the means for reducing the resonance of the vehicle seat 1 is the wire 14, it can be light and inexpensive.

In FIG. 8, the horizontal axis represents frequency (Hz) and the vertical axis represents vibration sound (dB) of the vehicle seat 1 generated in accordance with traveling vibration. Moreover, in FIG. 8, the broken line shows the data of related technology, and the continuous line has shown the data of this embodiment. As shown in FIG. 8, in this embodiment, vibration noise is reduced in all frequency ranges as compared with the related art. In particular, in the frequency range indicated by the arrows in FIG. 8, the vibration noise is greatly reduced in the present embodiment as compared with the related art.

In the vehicle seat 1, the other end portion 17 of the wire 14 is pivotally supported on the seat back 3 via the ball joint portion 30 at the rotation center position of the reclining device 8. Thereby, the wire 14 provided in order to reduce the resonance of the vehicle seat 1 does not hinder the rotation of the seat back 3 forward and backward.

In the above-described embodiment, an automobile seat has been described as an example of a vehicle seat, but the present invention is not limited to this and may be a seat mounted on an aircraft, a railway vehicle, a ship, or the like.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible.

Claims (4)

A seat cushion supported by a vehicle floor and having a cross frame;
A seat back that is supported by the seat cushion so as to be rotatable in the front-rear direction and has a reinforcing frame;
A wire having one end supported by the cross frame of the seat cushion and the other end rotatably supported by the reinforcing frame of the seat back;
Vehicle seat with A reclining device further supporting the seat cushion and the seat back so as to be able to rotate back and forth at a rotation center position;
The vehicle seat according to claim 1, wherein the other end portion of the wire is rotatably supported by the reinforcing frame at the rotation center position. The vehicle seat according to claim 1 or 2, wherein the other end of the wire is rotatably supported on the reinforcing frame via a ball joint. The vehicle seat according to claim 1 or 2, wherein the other end portion of the wire is rotatably supported by the reinforcing frame via a hinge.

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