JP2020063000A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat which can inhibit damping of vibration by a vibration transmission member and transmit vibration to a seating person efficiently.SOLUTION: A vehicle seat 1 includes: a cushion pad 20; a wire-like vibration transmission member 6 buried in the cushion pad 20; and a vibration device 5 which vibrates the vibration transmission member 6. The vibration transmission member 6 has an action part 10 which extends along a seating person support surface 22 of the cushion pad 20 and vibrates in a direction intersecting with the seating person support surface. A tip part 10a of the action part 10 is bent in a vibration direction of the action part 10 and in a direction away from the seating person support surface 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle seat.

  In a vehicle seat (hereinafter also simply referred to as a seat) mounted on a vehicle such as an automobile, a vibrating device (vibrating body) is arranged between a cushion pad and a trim cover that covers the cushion pad, and the vehicle deviates from the lane. There is known a seat for transmitting information such as the approach of an obstacle to a seated person by vibration. In addition, a seat in which a vibration transmitting member that is vibrated by the vibrating device is embedded in a cushion pad in order to reduce the feeling of foreign matter given to the seated person by the vibrating device is also known (for example, see Patent Document 1).

  In the seat described in Patent Document 1, the vibration transmitting member embedded in the cushion pad extends from the rear end portion of the cushion pad toward the front end portion side along the seat occupant supporting surface of the cushion pad. A plate fixing portion is formed at the rear end portion of the vibration transmitting member arranged at the rear end portion of the cushion pad by bending the vibration transmitting member in an L shape in the seat width direction. The plate is welded over the entire length of the plate fixing portion including the bent portion. The speaker, which is a vibrating device, is attached to this plate. In addition, a bending portion formed by bending the vibration transmitting member into a C shape along the seat occupant supporting surface of the cushion pad is formed at the front end portion of the vibration transmitting member.

JP, 2017-65643, A

  In the vehicle seat described in Patent Document 1, the bending portion of the vibration transmitting member is bent in a C shape along the seat occupant supporting surface of the cushion pad, and a part of the bending portion is different from the middle portion. Are arranged so as to project in the seat width direction. For this reason, the bent portion becomes a resistance against the vibration in the front-rear direction of the intermediate portion, and the vibration may be attenuated. Then, since the vibration is attenuated, there is a possibility that the vibration of the intermediate portion becomes difficult to be perceived.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle seat that is capable of excellently transmitting vibration to a seated person.

  A vehicle seat according to an aspect of the present invention includes a cushion pad, a wire-shaped vibration transmission member embedded in the cushion pad, and a vibrating device that vibrates the vibration transmission member. Has an action portion that extends along the seat occupant support surface of the cushion pad and vibrates in a direction intersecting with the seat occupant support surface, and a tip portion of the action portion has a vibration direction of the action portion and the seating position. It is bent in a direction away from the person support surface.

  According to the present invention, it is possible to provide a vehicle seat capable of excellently transmitting vibration to a seated person.

It is a perspective view showing an example of a vehicle seat for explaining the embodiment of the present invention. 2 is a side view of a vibration generator included in the vehicle seat of FIG. 1. FIG. It is a side view which expands and shows the front-end | tip part of the vibration transmission member of the vibration generator of FIG. It is a front view of the vibration generator of FIG. It is a side view of the modification of the front-end | tip part of the vibration transmission member of FIG. It is a side view of another modification of the tip part of the vibration transmission member of FIG. It is an enlarged view of another modification of the tip part of the vibration transmission member of FIG. It is an enlarged view of another modification of the tip part of the vibration transmission member of FIG. It is an enlarged view of another modification of the tip part of the vibration transmission member of FIG. It is a figure of the modification of the vibration transmission member of FIG. It is a top view of the modification of the vehicle seat of FIG.

  FIG. 1 is a perspective view of an example of a vehicle seat for explaining an embodiment of the present invention.

  A vehicle seat 1 (hereinafter also simply referred to as a seat) shown in FIG. 1 is a seat installed in a vehicle such as an automobile, and the buttocks and thighs of an occupant seated on the seat 1 (hereinafter referred to as a seated person). A seat cushion 2 that supports the seat cushion, a seat back 3 that supports the waist and back of the seated person, and one or more (two in this example) vibration generators 4 and 4.

  The seat cushion 2 has a cushion pad 20 made of a foam material such as urethane foam, and a trim cover 21 that covers the cushion pad 20. The occupant support surface 22 of the cushion pad 20 is the upper surface of the cushion pad 20 that is in contact with the buttocks and thighs of the occupant via the trim cover 21. The seat back 3 also has a cushion pad made of a foam material such as urethane foam, and a trim cover that covers the cushion pad. The seat occupant support surface of the cushion pad of the seat back 3 is the front surface of the cushion pad that contacts the waist and back of the seat occupant via the trim cover.

  In this example, two vibration generators 4 and 4 are installed in the central portion of the seat cushion 2 in the seat width direction, and one vibration generator 4 independently generates vibration or two vibration generators 4 and 4. 4 cooperate to generate vibration. The vibration generated by the vibration generator 4 is perceived by the seated person, so that various information is transmitted to the seated person.

  The vibration generating device 4 is configured to include a vibrating device 5 and a vibration transmitting member 6 vibrated by the vibrating device 5.

  The vibration transmitting member 6 is a wire-shaped member, and one end of the vibration transmitting member 6 is connected to the vibration exciter 5. The vibration transmission members 6 of the two vibration generators 4 are spaced apart from each other in the seat width direction and embedded in the cushion pad 20, and extend in the seat front-rear direction as a whole. Since the vibration transmitting member 6 is embedded in the cushion pad 20, compared to a case where the vibration transmitting member 6 is installed so as to contact the trim cover 21 between the cushion pad 20 and the trim cover 21, for example, a seated person The feeling of foreign matter given to the person is reduced. The vibration device 5 may be embedded in the cushion pad 20, may be provided between the cushion pad 20 and the trim cover 21, or may be exposed from the trim cover 21.

  As the vibrator of the vibrating device 5, for example, an exciter described in JP-A-2017-19386 can be used. The exciter has a voice coil arranged in a magnetic circuit formed by a permanent magnet and a yoke, and by supplying an AC signal to the voice coil, the voice coil and a voice coil bobbin supporting the voice coil respond to the AC signal. Vibrates at the specified frequency. This vibration is transmitted to the vibration transmission member 6. According to the exciter, the vibration part of the vibration transmission member 6 can be appropriately changed according to the frequency of the AC signal supplied to the voice coil, and various information can be transmitted to the seated person. .

  The material of the vibration transmitting member 6 may be any material that can easily transmit the vibration generated by the vibrating device 5, and is, for example, a metal material such as iron, copper, aluminum, magnesium, spring steel, or an alloy thereof. The material of the vibration transmitting member 6 may be a resin material such as fiber reinforced plastic. The material of the vibration transmitting member 6 is appropriately selected based on various viewpoints such as moldability, weight reduction, and adjustment of resonance point. The cross-sectional shape of the vibration transmitting member 6 may be a polygonal shape such as a triangular shape or a quadrangular shape, but is preferably a circular shape from the viewpoint of reducing the feeling of foreign matter given to the seated person.

  The seat 1 in which the two vibration generators 4 and 4 are provided on the seat cushion 2 while being separated from each other in the seat width direction can be used, for example, in a lane departure prevention support system. The lane departure prevention support system recognizes the lane based on the image in front of the vehicle, and issues a warning when the vehicle departs from or is about to depart from the lane when the vehicle's turn indicator is not operated. It informs the crew.

  The front of the vehicle is imaged by a camera mounted on the vehicle, and the obtained image data is transmitted to an ECU (Electronic Control Unit) mounted on the vehicle. The ECU uses a known image recognition technique to recognize the lane from the image data, and determines whether or not the vehicle deviates from or is likely to deviate from the lane. Further, the ECU determines, if the vehicle deviates or is likely to deviate from the lane, deviates or is likely to deviate from the lane to the left, or deviates or is likely to deviate from the lane to the right.

  When it is determined that the vehicle deviates or is about to deviate from the lane to the left, the ECU operates the vibration generator 5 of the left vibration generator 4 of the two vibration generators 4 provided on the seat cushion 2. Let As a result, the vibration is transmitted to the left side of the seated person's body, and the seated person's attention to the lane departure to the left side is called. On the other hand, when it is determined that the vehicle deviates or is about to deviate to the right from the lane, the ECU determines that the vibration generating device of the vibration generating device 4 on the right side of the two vibration generating devices 4 provided in the seat cushion 2 is included. 5 is operated. As a result, the vibration is transmitted to the right side of the seated person's body, and the seated person's attention to the lane departure to the right side is called.

  The seat 1 can also be used in a system for informing an occupant of approaching obstacles (other vehicles, etc.) on the front, rear, left, and right of the vehicle, a system for preventing the occupant from falling asleep, and the like. The number and arrangement of the vibration generators 4 are appropriately set according to the application. For example, when the seat 1 is used in a system for preventing a passenger from falling asleep, the number of vibration generators 4 may be one. Further, one or more vibration generators 4 may be provided on the seat back 3. The vibration generator 4 provided in the seat back 3 can be configured in the same manner as the vibration generator 4 provided in the seat cushion 2, except that the vibration transmission member 6 is extended in the seat vertical direction as a whole.

  FIG. 2 shows the configuration of the vibration generator 4.

  As shown in FIG. 2, the vibration transmission member 6 includes an action part 10 that transmits vibration to a seated person, an input part 11 that is excited by the vibration exciter 5, and a space between the action part 10 and the input part 11. And an intervening bent portion 12. The bending portion 12 is formed by bending an intermediate portion in the length direction of the vibration transmitting member 6 at a substantially right angle, and one end side of the vibration transmitting member 6 is the acting portion 10 with the bending portion 12 sandwiched therebetween. The other end side of 6 serves as an input portion 11, and the operating portion 10, the input portion 11, and the bent portion 12 are integrally formed. The action portion 10 is arranged to extend in the seat front-rear direction (first direction x) along the seat occupant support surface 22 of the cushion pad 20. On the other hand, the input unit 11 is arranged so as to extend in the seat up-down direction (second direction y) that intersects with the occupant support surface 22.

  The vibrating device 5 has a main body 13 including a vibrator and a bracket 16. The bracket 16 is joined to the end portion 11 a of the input unit 11 on the side opposite to the bent portion 12 side, and is appropriately separated from the bent portion 12. The main body 13 is fixed to the bracket 16 and attached to the input unit 11 via the bracket 16.

  The main body 13 of the vibrating device 5 vibrates the end portion 11 a of the input unit 11 via the bracket 16 in the seat front-rear direction substantially parallel to the extending direction (first direction x) of the action unit 10. The vibration direction (third direction z) is not limited to a direction substantially parallel to the extending direction (first direction x) of the acting portion 10, and the extending direction (first direction x) of the acting portion 10 and It suffices that the direction intersects the extending direction (second direction y) of the input unit 11 within a plane defined by the extending direction (second direction y) of the input unit 11.

  The vibration input to the end 11 a of the input unit 11 propagates to the acting unit 10 via the bending portion 12. Here, because the vibration transmitting member 6 is not a completely rigid body and the end portion 11a of the input portion 11 is appropriately separated from the bending portion 12, the vibration input to the end portion 11a is the bending portion 12a. Based on the bending of the vibration transmission member 6 at, the vibration in the seat longitudinal direction is converted into the vibration in the seat vertical direction and propagates to the acting portion 10. The vibration output from the action portion 10 is vibration in the seat vertical direction that is substantially perpendicular to the seat occupant support surface 22 of the cushion pad 20, and is easily perceived by the seat occupant.

  FIG. 3 shows the distal end portion of the action portion 10 in an enlarged manner.

  The front end portion 10a of the action portion 10 is bent downward in the seat away from the seat occupant support surface 22 in the seat vertical direction, which is the vibration direction of the action portion 10. Although the edge is easily perceived by the seated person, the edge of the tip of the tip end portion 10a is directed to the lower surface of the cushion pad 20 on the side opposite to the seated person support surface 22, and the foreign body feeling given to the seated person is reduced. . The front end portion 10a bent in the seat up-down direction does not resist the vibration of the action portion 10 in the seat up-down direction, and damping of the vibration caused by the bent front end portion 10a is suppressed. This makes it possible to properly transmit the vibration to the seated person.

  On the other hand, the front end portion 10a bent in the seat up-down direction resists the axial movement of the action portion 10 extending in the seat front-rear direction. For example, when a shock in the front-back direction of the seat acts on the vibration transmitting member 6, the tip portion 10a is caught by the cushion pad 20, and the displacement of the vibration transmitting member 6 is suppressed. Further, as shown in FIG. 4, the front end portion 10a bent in the vertical direction of the seat becomes a resistance against the rotation of the action portion 10 around the central axis X, and, for example, an impact in the seat width direction is applied to the vibration transmission member 6. When acting, the tip portion 10a is caught by the cushion pad 20, and the inclination of the vibration transmitting member 6 is suppressed. Thus, the fixing strength of the vibration transmitting member 6 is increased by the front end portion 10a bent in the seat vertical direction.

  It should be noted that the tip portion 10a of the action portion 10 may be bent downward in the seat, and may be folded back into a J-shape as shown in FIG. 5, or as shown in FIG. It may be bent at multiple points. When the tip portion 10a is bent at a plurality of points, the tip portion 10a can be shaped according to the shape of the seat occupant support surface 22 of the cushion pad 20, and the degree of freedom in arranging the action portion 10 can be increased.

  Further, the distal end portion 10a of the acting portion 10 may be subjected to a terminal treatment for hiding the edge of the distal end. In the terminal processing, for example, the spherical body 30 made of a metal material may be welded to the tip portion 10a as shown in FIG. 7, or the cap 31 may be covered on the tip portion 10a as shown in FIG. The tip portion 10a may be folded back and flattened as shown in FIG.

  FIG. 10 shows a modification of the vibration transmitting member 6, in which the acting portion 10 has the convex portion 14. The convex portion 14 is formed by bending a part of the working portion 10 in the seat up-down direction, which is the vibration direction of the working portion 10, so that the seated person of the cushion pad 20 is seated more than other portions of the working portion 10 except the convex portion 14. It is arranged close to the support surface 22. Therefore, the vibration in the convex portion 14 is relatively easily perceived by the seated person. Note that the action portion 10 may have a recess that is separated from the seat occupant support surface 22 of the cushion pad 20 instead of or in addition to the protrusion 14. Vibration in the recess is relatively difficult to be perceived by a seated person. By appropriately combining the convex portion 14 and the concave portion, it is possible to variously change the layout of the vibration transmission range on the occupant support surface 22.

  Up to this point, the vibration generating device 4 has been described as being installed in the central portion of the seat cushion 2 in the seat width direction, and the operating portion 10 vibrates in the seat vertical direction, but as shown in FIG. May be installed at both end portions of the seat cushion 2 in the seat width direction, that is, at side support portions that support side portions of the thighs of the seated person. When the vibration generator 4 is installed in the side support portion of the seat cushion 2, the action portion 10 vibrates in the seat width direction intersecting the seat occupant support surface of the side support portion, and the tip portion 10a of the action portion 10 becomes The seat is bent outward in the seat width direction and away from the seat occupant support surface.

  Although the present invention has been described above by taking the seat 1 installed in a vehicle such as an automobile as an example, the present invention is also applicable to seats for vehicles other than vehicles such as ships and aircrafts.

  As described above, the vehicle seat disclosed in the present specification includes a cushion pad, a wire-shaped vibration transmission member embedded in the cushion pad, and a vibration device that vibrates the vibration transmission member. The vibration transmission member has an action portion that extends along the seat occupant support surface of the cushion pad and vibrates in a direction intersecting the seat occupant support surface, and the tip end portion of the action portion has the action. The part is bent in the direction of vibration and in a direction away from the occupant support surface.

  Further, in the vehicle seat disclosed in the present specification, the tip portion of the action portion is subjected to a terminal treatment for hiding the edge.

  Further, in the vehicle seat disclosed in the present specification, the acting portion is bent in a vibration direction of the acting portion, and the convex portion approaching the seated person support surface and / or the seated person support surface. It has a recess which is separated.

  Further, the vehicle seat disclosed in the present specification, the vibration transmitting member has a bent portion, and an input portion, the action portion is provided on one end side with respect to the bent portion, The input portion is provided on the other end side with respect to the bent portion and extends in a direction intersecting with the occupant support surface, and the vibration device includes an extending direction of the acting portion and the input portion. The input section is vibrated in a direction intersecting the extending direction of the input section within a plane defined by the extending direction of the section.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat back 4 Vibration generator 5 Vibrating device 6 Vibration transmission member 10 Action part 10a Tip of action part 11 Input part 12 Bending part 13 Main body 14 Convex part 16 Bracket 20 Cushion pad 21 Trim cover 22 Seated person support surface 30 Sphere 31 Cap

Claims (4)

Cushion pad,
A wire-shaped vibration transmitting member embedded in the cushion pad,
A vibrating device for vibrating the vibration transmitting member,
Equipped with
The vibration transmission member has an action portion that extends along the seat occupant support surface of the cushion pad and vibrates in a direction intersecting the seat occupant support surface,
A vehicle seat in which a tip portion of the action portion is bent in a vibration direction of the action portion and in a direction away from the seated person support surface. The vehicle seat according to claim 1,
A vehicle seat in which the tip portion of the action portion is subjected to a terminal treatment for hiding the edge. The vehicle seat according to claim 1 or 2, wherein:
The vehicle seat, wherein the acting portion is bent in a vibration direction of the acting portion, and has a convex portion that approaches the occupant supporting surface and / or a concave portion that separates from the occupant supporting surface. The vehicle seat according to any one of claims 1 to 3,
The vibration transmission member has a bent portion and an input portion,
The acting portion is provided on one end side with respect to the bent portion,
The input portion is provided on the other end side with respect to the bent portion, and extends in a direction intersecting the seated person support surface,
The vibrating device vibrates the input section in a direction intersecting the extending direction of the input section within a plane defined by the extending direction of the acting section and the extending direction of the input section. .

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