JPH05174992A - Seat for vehicle - Google Patents

Abstract

PURPOSE:To relax an influence of static electricity to an occupant at a low cost. CONSTITUTION:A seat 1 for a vehicle comprises a conductive band material 13 provided to extend in a longitudinal direction of the vehicle in a top part 12 of a side support 4 in an on-off getting side of a seat cushion 2 and a conductive band material 23 provided to extend in a width direction of the vehicle in the front end part in an upper surface of the seat cushion 2. Each of the conductive band materials 13, 23 is electrically connected to a car body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat for alleviating the influence of static electricity on an occupant.

[0002]

2. Description of the Related Art Between a seat in a vehicle and an occupant seated on the seat, static electricity is generated due to friction between the seat and the occupant. Especially, clothing of the occupant may be made of wool, nylon, silk or the like. Fibers that have the property of becoming positively charged when static electricity is charged are often used, while polyester, which becomes negatively charged when static electricity is charged, is often used as the fabric for the skin. Below, when the occupant leaves the seat, the positive charge of the positive charge is large, and the occupant's electrification pressure is high. In such a state, when the occupant touches a conductor having a large capacitance, for example, a conductive portion of the vehicle body, the high charged pressure of the occupant is instantly discharged, and the occupant may be shocked.

Therefore, in order to eliminate the influence of the electrostatic charge generated by the friction between the seat and the occupant, the occupant who is charged away from the seat is placed on the touch panel provided on the vehicle body including the semiconductor portion. By making contact with each other, it is possible to avoid a sudden discharge and mitigate a shock received by the sudden discharge.

Further, it is known that the cushioning material of the seat holds the conductivity to discharge the generated static electricity to the vehicle body. Further, as described in Japanese Utility Model Application Laid-Open No. 62-26743, There has been proposed a sheet material intended to prevent generation of static electricity by applying a conductive backing containing carbon to a composite textile of conductive fibers as a skin material and further containing water.

[0005]

However, the above-mentioned touch panel grounds the electric charge charged on the occupant through the semiconductor having the resistance value of 10 ⁸ to 10 ⁹ Ω, and the resistance value of the semiconductor and the occupant are in contact with each other. There is a problem that the shape of the part or the relative humidity at the time of use is complicated, the setting of the corresponding appropriate values is complicated, and in addition, the number of steps for installing the touch panel increases.

Further, the use of a conductive cushioning material tends to increase the cost, and further, it is not practically used.
The sheet material proposed by Japanese Patent No. 26743 also has a problem that the weaving becomes complicated and the cost is unavoidable in terms of maintaining a moisturizing state.

In view of the above, it is an object of the present invention to reduce the effect of static electricity in a vehicle seat on an occupant at low cost.

[0008]

In order to achieve the above-mentioned object, the invention of claim 1 is to prevent static electricity generated in an occupant from sitting on a seat and rubbing the seat when the occupant leaves the seat. The purpose of this is to discharge the electric charge at the top of the side support on the side of getting on and off, which often comes into contact at the end, and to prevent the charging pressure of the occupant from rapidly increasing when the occupant is separated from the seat.

[0009] Specifically, the means for solving the problems of the first aspect of the invention is to provide a conductive strip member provided at the top of a side support on a side of a seat cushion having a side support so as to extend in the vehicle front-rear direction, and the conductive material. And a connecting means for electrically connecting the strip to the vehicle body.

According to the second aspect of the invention, the front end portion of the upper surface of the seat cushion is often contacted with the static electricity generated in the occupant by seating on the seat and rubbing it when the occupant leaves the seat. In order to prevent a sudden increase in the charging voltage of the occupant when the vehicle is separated from the seat, the charging pressure is increased.

Specifically, the means for solving the problems according to the invention of claim 2 is to provide a conductive belt member provided at the front end portion of the upper surface of the seat cushion so as to extend in the vehicle width direction, and to electrically connect the conductive belt member to the vehicle body. And a connecting means for physically connecting.

[0012]

According to the structure of the invention of claim 1, a conductive strip provided on the top of the side support on the side of getting in and out of the seat cushion having the side support and extending in the vehicle front-rear direction,
Since the electrically conductive strip is provided with a connecting means for electrically connecting it to the vehicle body, when the occupant finally contacts the top of the side support when getting off the vehicle, the occupant is electrically charged by the friction between the occupant and the seat. The static electricity is discharged to the vehicle body in advance via the conductive strip.

According to the structure of the second aspect of the present invention, the conductive strip is provided at the front end of the upper surface of the seat cushion so as to extend in the vehicle width direction, and the connecting means for electrically connecting the conductive strip to the vehicle body. Therefore, when the last contact of the occupant when getting off is the front end of the upper surface of the seat cushion, static electricity charged to the occupant due to friction between the occupant and the seat separates from the seat. Immediately before, it is previously discharged to the vehicle body through the conductive strip.

[0014]

EXAMPLES The inventors of the present invention have examined how static electricity generation, charging and discharging between a vehicle seat and an occupant seated on the seat are changed depending on the behavior of the occupant from getting on and off. Was examined. As a result, there is an inseparable relationship between the behavior of the occupant and the charging electrostatic pressure in the occupant, and the human charging electrostatic pressure of the occupant in each behavior of the occupant 5 as shown in FIG. 5 is as shown in FIG. It was clarified that there is. That is, in FIG. 5, the state in which the seat and the occupant in the clothes described above are in friction is shown (a), the back of the occupant is separated from the seat (b), and the entire body of the occupant is separated from the seat. Time (c), when the occupant stands up from the seat (d), and when the occupant touches the conductor portion of the vehicle body or when the occupant touches the touch panel (indicated by a broken line in the figure). It was confirmed that when the human body charging pressures of the respective occupants in (e) are measured, the results are as shown in the graph of FIG.

According to the result shown in the graph of FIG. 6, the human body charging pressure gradually increases during the state of (a), and reaches from the state of (b) to immediately before the state of (c). During this period, the human body charging pressure gradually rises, and in the above state (c), the human body charging pressure rapidly becomes a high voltage.

This high human body electrification pressure may reach up to 25 KV due to the difference in the charging characteristics between the seat and the occupant's clothing as described above, and the insulation of the occupant's footwear from the ground. Was recognized.

Next, during the state of (d), the occupant's electrification at the above-mentioned human body electrification pressure is maintained, and in the state of (e), the electrification at a high human body electrification pressure is extremely short. It is discharged rapidly in time, and the occupant is easily shocked by the electric shock at this time. Incidentally, when the occupant with the high charged human body pressure touches the touch panel, as shown by the broken line in the graph of FIG. 6, the discharge is performed for a while and the electric shock is alleviated. And the shock was getting lighter.

As a result of the above, in view of the fact that the human body electrification pressure of the occupant rapidly becomes a high voltage in the state (c) in which the whole body of the occupant is separated from the seat, the present inventor considers that the whole body of the occupant is large. When the occupant leaves the seat,
Virtually static electricity that tends to electrify the occupant if the vehicle is separated from the seat while maintaining electrical continuity to the vehicle body is short-circuited by the electrical continuity, and avoids high human body electrification and electrification that cause the shock. The present invention has been completed based on this finding based on this finding.

Next, embodiments of the present invention will be described with reference to the drawings.

As illustrated in FIG. 1, a vehicle seat 1 applied to the present invention comprises a seat cushion 2 and a seat back 3, and each of the seat cushion 2 and the seat back 3 has side supports 4 and 4a. ing.

As shown in FIGS. 2 and 3, the vehicle seat 1 has a metal seat frame 5 and a metal seat pan 6 joined to the seat frame 5, and the seat frame 5 has a lower portion around the seat frame 5. A hooking portion 7 is provided which is projected from the seat frame 5 and hooks the skin of the seat. A slider 8 is provided on the lower surface of the seat frame 5, and the slider 8 engages with a rail 9 provided on a floor member of the vehicle body, is guided by the rail 9 and is slidable in the vehicle longitudinal direction. The slider 8 is electrically connected to the vehicle body.

A cushion material 10 made of, for example, a soft polyurethane foam material is placed on the upper surface of the seat pan 6, and a skin 11 is provided in contact with the surface of the cushion material 10 and a peripheral edge portion of the skin 11 is formed. The cushion material 10 is retained by being retained by the retaining portion 7.
Is covered.

In one embodiment of the present invention, as shown in FIG. 1, the side support portion 4 is provided on the side of the side support portion 4 provided in contact with the seat cushion 2 of the vehicle seat 1 as described above, on which the occupant gets in and out. A conductive strip 13 is provided extending along the top 12 of the.

The conductive strip 13 is provided so as to extend in the vehicle front-rear direction at the top 12 of the side support 4 in the seat cushion, as shown in the cross section of the main part in FIG. 13 is connected to a seat pan (not shown) by a conductor 14 as the connecting means.

The conductive strip 13 in the embodiment whose main part is shown in FIG. 4 is a strip-shaped conductive polyurethane foam which is in contact with the inner surface of the outer skin 11 at the stitched portion of the outer skin 11 at the top 12 of the side support 4. It is held by the conductive thread 13a reaching the surface 11 of the side support 4, and the conductive strip 13 thus formed facilitates electrical connection between the occupant and the vehicle body. ing. The conductive strip 13 is made of conductive polyurethane foam as described above, and the conductive polyurethane foam has a resistance value of about 10 ³ Ω by mixing an appropriate amount of a conductive material such as carbon powder. Therefore, even when the conductive thread 13a has low conductivity or the conductive thread 13a is not used, the conductive strip 13 is formed on the occupant's clothing despite being covered with the outer skin 11. It is possible to move charges to the conductive strip 13 in response to static electricity.

The conductor 14 as the connecting means is connected to the conductive strip 13 at one end and is connected to the seat pan 6 at the other end so that the conductive strip 1 is formed.
3 is electrically connected to the vehicle body. In addition to the conductor 14, the connecting means may extend the conductive strip 13 and electrically connect the extension to the vehicle body.
As another embodiment of the present invention, an embodiment in which the above-mentioned conductive strip is a conductive strip 23 provided at the front end of the upper surface of the seat cushion 2 so as to extend in the vehicle width direction is also shown in FIG. Has been done.

In this embodiment, the above-mentioned conductive strip 13 is provided at the top of the side support 4 on the occupant entry / exit side of the seat cushion 2 so as to extend in the vehicle front-rear direction, or in the above-described conductive strip. When the member 13 is not provided, the foot of the occupant is likely to be finally separated from the seat when the occupant leaves the vehicle, depending on the vehicle type, at the front end portion of the upper surface of the seat cushion 2 in the vehicle width direction. A conductive strip 23 is provided to extend.

Also in the conductive strip 23 in this embodiment, the conductive polyurethane foam having the same resistance value is held on the skin 11 of the seat cushion 2 as in the conductive strip 13 in the above embodiment. The conductive strip 23 is provided and is electrically connected to the vehicle body by the same connecting means.

In the above embodiments, the conductive strips 13 extending in the vehicle front-rear direction are provided at the tops of the side supports 4 on the passenger side of the seat cushion 2, and the front end of the upper surface of the seat cushion 2 extends in the vehicle width direction. It goes without saying that it is possible to provide a conductive strip that extends along the top of the side support 4a on the passenger's entry / exit side of the seat back 3 together with the conductive strip 23 that extends.

Another embodiment of the present invention is an embodiment that is particularly advantageous when applied to the rear seats of vehicle seats. Also in this embodiment, a conductive strip that extends in the vehicle width direction is provided at the front end portion of the upper surface of the seat cushion, which is the last contact portion between the seat and the occupant when the occupant gets off, and the conductive strip is provided. By utilizing the corona discharge phenomenon when the material is electrically connected to the vehicle body, the electric discharge from the conductive strip material provided on the seat to the vehicle body is performed more smoothly.

In this embodiment, the conductive strip is electrically connected to a metallic seat frame, and the seat frame is supported by the vehicle body. The seat frame side supporting leg and the vehicle body side receiving portion are supported. And have pointed portions facing each other. The pointed portion may be provided on either or both of the support leg side of the seat frame and the receiving portion side on the vehicle body side. Such a pointed tip made of metal or conductive resin that can face each other is used. In the structure having the seat frame receiving / supporting portion, the electrostatic charge on the seat side is discharged more smoothly to the vehicle body side by increasing corona discharge at the pointed portion of the seat portion and accelerating corona discharge.

As described above, the vehicle seat 1 according to the present invention has the side support 4 on the entry / exit side of the seat cushion 2.
Since it has at least one of the conductive strips 13 at the top 12 and the conductive strips 23 at the upper end surface of the seat cushion 2, as shown in FIG. When the passenger gets off the vehicle and tries to separate from the seat, the passenger comes into contact with the charging strip 13 or 23 on the seat. Then, the positive static electricity generated in the body of the occupant during this contact is gently discharged to the vehicle body side through the conductive polyurethane foam and the conductor 14 constituting the conductive strip 13 or 23. Most of it is lost, and when the occupant leaves the seat as shown in FIG. 5 (c), the occupant is not charged with a high body charging pressure.

[0033]

As described above, according to the vehicle seat of the first aspect of the present invention, the electrically conductive strip is provided on the top of the side support on the side of getting on and off the seat cushion having the side support so as to extend in the vehicle longitudinal direction. And a connecting means for electrically connecting the conductive strip to the vehicle body, the static electricity charged to the occupant when the occupant finally contacts the top of the side support at the time of getting off the vehicle is Since it is previously discharged to the vehicle body through the elastic band material, the rise in human charging electrostatic pressure in the occupant when the occupant and the seat are separated is suppressed, and the sudden discharge when the occupant comes into contact with the conductive part of the vehicle Shocks are prevented at low cost.

According to the second aspect of the present invention, a conductive strip provided at the front end portion of the upper surface of the seat cushion so as to extend in the vehicle width direction, and a connection for electrically connecting the conductive strip to the vehicle body. Since the vehicle is equipped with the means, static electricity charged to the occupant when the occupant finally contacts the front end portion of the upper surface of the seat cushion when getting off the vehicle is discharged to the vehicle body in advance through the conductive strip material. Therefore, when the occupant and the seat are separated from each other, an increase in human body charging pressure in the occupant is suppressed, and a shock due to a sudden discharge when the occupant comes into contact with the conductive portion of the vehicle body is prevented at low cost.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a metallic portion of a vehicle seat according to the present invention.

FIG. 3 is a cross-sectional view of an essential part of an embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view of an essential part of an embodiment of the present invention.

5 (a), (b), (c), (d), and (e) are perspective views for explaining the behavior of an occupant when getting off the vehicle.

FIG. 6 is a graph showing a relationship between each behavior of an occupant when getting off the vehicle and a human charged electrostatic pressure at that time.

[Explanation of symbols]

 1 Vehicle Seat 2 Seat Cushion 3 Seat Back 4, 4a Side Support 5 Seat Frame 6 Seat Pan 8 Slider 9 Rail 11 Skin 12 Top 13 and 23 Conductive Band 13a Conductive System 14 Conductor

Claims (2)

[Claims] 1. A conductive strip provided on the top of a side support on the side of getting in and out of a seat cushion having a side support and extending in the vehicle front-rear direction, and a connecting means for electrically connecting the conductive strip to a vehicle body. A vehicle seat characterized by being provided. 2. An electrically conductive strip provided at the front end of the upper surface of the seat cushion so as to extend in the vehicle width direction, and a connecting means for electrically connecting the electrically conductive strip to the vehicle body. Characteristic vehicle seat.