JP2019175857A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat capable of improving an operation accuracy of a seating sensor for detecting a seating for a passenger.SOLUTION: A seat 3 comprises: a resin frame 26 in which a penetration hole 26A is formed; a rubber sheet 23A arranged on an upper direction of the resin frame 26; and a membrane switch 24 arranged between the resin frame 26 and the rubber sheet 23A. The membrane switch 24 includes: a contact point 24A; a suction exhaust port 24B communicated with the contact point 24A; and a harness 24E connected with the contact point 24A. One end part of the membrane switch 24 is provided with the harness 24E on one side, and the other side is provided with the suction exhaust port 24B, and is formed so as to be branched into two. The suction exhaust port 24B is penetrated to the penetration hole 26A of the resin frame 26.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a vehicle seat provided with a seating sensor.

  2. Description of the Related Art A vehicle seat such as a motorcycle is known that is provided with a seating sensor (membrane switch) for detecting the seating of an occupant, as described in Patent Document 1, for example.

  The membrane switch has a mechanism for detecting whether or not an occupant is seated by contact between the contact points of the upper and lower electrode sheets with a load caused by the seating of the occupant. The membrane switch has an intake / exhaust port for taking in and out air between the upper and lower electrode sheets.

JP 2007-283856 A

  Here, if a passenger's load is applied to the air intake / exhaust port of the membrane switch, the air intake / exhaust port is crushed, and air is not smoothly taken in and out between the upper and lower electrode sheets, and the operation response of the membrane switch is delayed. There is.

  The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle seat that can improve the operation accuracy of a seating sensor that detects the seating of an occupant.

According to the vehicle seat of the present invention, the subject is a support member in which a through hole is formed, a first cushion member disposed above the support member, the support member, and the first cushion member. A seating sensor disposed between the seating sensor, the seating sensor having a contact portion, an intake / exhaust port communicating with the contact portion, and a harness connected to the contact portion. One end portion is provided with the harness on one side and the intake / exhaust port portion on the other side, and is divided into two parts. The intake / exhaust port portion is formed through the penetration of the support member. It is solved by passing through the hole.
According to the above vehicle seat, the intake / exhaust port portion of the seating sensor can be prevented from being crushed by the load of the occupant. Thereby, the intake / exhaust function of the seating sensor can be ensured, and the operation accuracy of the seating sensor can be improved.
Further, by protecting the intake / exhaust port portion of the seating sensor with the support member, damage to the intake / exhaust port portion can be prevented.

In the vehicle seat described above, it is preferable that the harness is disposed so as to be shifted from the intake / exhaust port portion in the seat left-right direction.
In the above vehicle seat, it is preferable that the intake / exhaust port portion is disposed below the support member through the through hole of the support member.
Thus, the intake / exhaust port portion of the seating sensor can be exposed by disposing the intake / exhaust port portion below the support member. Thereby, the intake of outside air at the intake / exhaust port can be stabilized.
Further, since the intake / exhaust port portion can be separated from the first cushion member, the composition material of the first cushion member can be prevented from entering from the intake / exhaust port portion.

The vehicle seat may further include a second cushion member disposed on the support member, the first cushion member disposed above the second cushion member, and the seating sensor It is preferable that the second cushion member is disposed between the first cushion member and the second cushion member.
Thus, the seating sensor can be protected by sandwiching the seating sensor between the first cushion member and the second cushion member.

In the above vehicle seat, it is preferable that the first cushion member includes a rubber material containing a sulfur component.
By doing so, the cushion performance can be improved. Even in such a case, since it is possible to suppress the sulfur component from entering from the intake / exhaust port of the seating sensor, it is possible to prevent performance degradation of the contact portion.

In the above vehicle seat, it is preferable to further include a seat heater disposed on the seating sensor.
By doing so, it is possible to prevent intrusion of dew condensation caused by the heat of the heater. Thereby, corrosion of a seating sensor can be suppressed and the lifetime of a seating sensor can be extended.
Moreover, according to said structure, the comfort of the vehicle seat can be improved. Even in such a case, since the intake / exhaust port portion of the seating sensor can be disposed at a position not in contact with the seat heater, damage to the intake / exhaust port portion due to heat can be prevented.

According to the present invention, the intake / exhaust function of the seating sensor can be secured, and the seating sensor can be stably operated.
According to the present invention, it is possible to stabilize the intake of outside air at the intake / exhaust port.
According to the present invention, the composition material of the first cushion member can be prevented from entering from the intake / exhaust port.
According to the present invention, the seating sensor can be protected.
According to the present invention, the cushion performance of the first cushion member can be improved.
According to the present invention, comfort of a vehicle seat can be improved.

It is a figure showing a motorcycle carrying a seat concerning this embodiment. It is a perspective view of a sheet. It is a disassembled perspective view of a sheet | seat. It is a figure explaining the structure of a membrane switch. It is a perspective view of the state which assembled | attached the front part cushion member and the membrane switch to the resin frame. It is a top view of the state which assembled | attached the front part cushion member and the membrane switch to the resin frame. It is VII-VII sectional drawing of a through-hole periphery. It is a figure which shows typically the structure of the periphery of an inlet / outlet part. FIG. 8 is an arrow view in the IX direction of FIG. 7.

Hereinafter, a seat 3 (an example of a vehicle seat) according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS. 1 to 9. The seat 3 according to the present embodiment is an example in which the vehicle seat according to the present invention is applied to a motorcycle seat, but the seat 3 is merely an example for facilitating the understanding of the present invention. It is not intended to limit the invention. That is, the shape, dimensions, arrangement, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.
In the following description, the front / rear, left / right, and upper / lower directions are the same as those viewed from the seated person of the seat 3.

FIG. 1 shows the appearance of a motorcycle 1 equipped with a seat 3 according to this embodiment. As shown in FIG. 1, the motorcycle 1 may have the same configuration as a general motorcycle except for the seat 3.
The seat 3 is a saddle-type seat that is seated in a state where an occupant (driver) straddles it, and is detachably attached to the motorcycle 1. Specifically, an attachment hole (not shown) is formed in the motorcycle 1, and the seat 3 is attached to the motorcycle 1 using the attachment hole and a fastener.

Next, the configuration of the sheet 3 will be described with reference to FIG.
As shown in FIG. 2, the seat 3 includes a seating portion 3a, an inclined portion 3b, and a rear portion 3c in order from the front.

The seating portion 3a is a surface that supports the occupant's buttocks.
The inclined portion 3b is a surface that supports the waist of the occupant. Specifically, the inclined portion 3b connects the seating portion 3a and the rear portion 3c, and forms a surface inclined obliquely rearward from the rear end of the seating portion 3a.
The rear portion 3c is connected to the inclined portion 3b and is provided at a higher position in the vertical direction with respect to the seating portion 3a.
Further, a through hole for attaching a backrest is formed in the rear part 3c, and in a state where the backrest is removed, a cover member 30 for closing the through hole is attached as shown in FIG.
Thus, in a state where the backrest is removed from the seat 3, the rear portion 3c can be used as a rear seat for two-seater.

  FIG. 3 shows an exploded perspective view of the sheet 3. As shown in FIG. 3, the seat 3 includes a resin frame 26 (an example of a support member), a front cushion member 21, a thermistor support member 25, a membrane switch 24, a seat heater 23, a rear cushion member 22, a skin material 20, A cover member 30 is provided.

  The resin frame 26 is a synthetic resin frame member. In the present embodiment, a through hole 26A is formed at the center of the resin frame 26, and an opening 26B is further formed behind the through hole 26A.

  The front cushion member 21 (an example of a second cushion member) is a cushion member disposed on the resin frame 26 at the front portion of the resin frame 26. For example, urethane foam may be used for the front cushion member 21. The front cushion member 21 is a cushion member disposed at the position of the seating portion 3 a of the seat 3.

  The rear cushion member 22 is a cushion member disposed on the resin frame 26 from the central inclined portion of the resin frame 26 to the rear portion. For example, urethane foam may be used for the rear cushion member 22. The rear cushion member 22 is a cushion member disposed at the positions of the inclined portion 3b and the rear portion 3c of the seat 3.

  The membrane switch 24 is a seating sensor that detects the seating of an occupant on the seating portion 3 a of the seat 3. Hereinafter, the configuration of the membrane switch 24 will be described with reference to FIG.

  As shown in FIG. 4, the membrane switch 24 includes a plurality of contact portions 24A, intake / exhaust ports 24B, a communication portion 24C, a circuit portion 24D, a harness 24E, and a connector 24F.

24 A of contact parts arrange | position an upper and lower electrode through an air layer. When a load from above is applied to the contact portion 24A, the upper and lower electrodes come into contact with each other.
Here, each contact portion 24A is connected to the intake / exhaust port portion 24B via a communication portion 24C which is an air passage, and the air between the upper and lower electrodes of the contact portion 24A is connected to the communication portion 24C and the intake / exhaust port. Go in and out through part 24B.

  In addition, the circuit unit 24D detects an ON signal indicating that the upper and lower electrodes are in contact with each contact unit 24A, and the detected ON signal is transmitted via the harness 24E and the connector 24F provided at the end of the harness 24E. And output to the ECU of the motorcycle 1.

  Here, the arrangement of the membrane switch 24 will be described with reference to FIGS.

  As shown in FIGS. 5 and 6, the contact portion 24 </ b> A of the membrane switch 24 is disposed on the front cushion member 21.

  As shown in FIGS. 5 to 9, the intake / exhaust port portion 24 </ b> B of the membrane switch 24 is arranged to be exposed from below the resin frame 26 through the through hole 26 </ b> A of the resin frame 26.

As shown in FIGS. 3 and 7, the seat heater 23 is disposed on the contact portion 24 </ b> A of the membrane switch 24.
The seat heater 23 includes a rubber sheet 23A (an example of a first cushion member), a heater wire 23B, and a thermistor 23C.

The rubber sheet 23 </ b> A is a cushion member disposed on the front cushion member 21. In other words, the rubber sheet 23A is a cushion member that is disposed at the position of the seating portion 3a of the seat 3 in the top view and above the resin frame 26 in the side view.
For the rubber sheet 23A, for example, a rubber material cross-linked by adding sulfur to a rubber raw material is used. By carrying out like this, the elastic modulus of rubber sheet 23A can be made high and cushioning properties can be improved.
Moreover, the heater wire 23B is bonded to the surface (lower surface or upper surface) of the rubber sheet 23A.

  The heater wire 23B is connected to the thermistor 23C, and energization is controlled according to temperature control by the thermistor 23C.

As shown in FIGS. 7 and 8, the intake / exhaust port portion 24B is disposed so as to be exposed to the outside of the resin frame 26 from the through hole 26A of the resin frame 26, thereby making the intake / exhaust port portion 24B a rubber sheet. It can be arranged at a position away from 23A.
In this manner, by arranging the intake / exhaust port 24B of the membrane switch 24 and the rubber sheet 23A apart from each other, it is possible to suppress the intake of the sulfur component of the rubber sheet 23A from the intake / exhaust port 24B.

If the sulfur component is taken in from the intake / exhaust port 24B, the sulfur component reaches the contact portion 24A through the communication portion 24C, and the silver and sulfur components contained in the electrode of the contact portion 24A May react (sulfurization) and cause a contact failure of the contact portion 24A.
On the other hand, in the seat 3 according to the present embodiment, the intake / exhaust port portion 24B of the membrane switch 24 is disposed below the resin frame 26 through the through hole 26A of the resin frame 26, so The sulfur component contained in the rubber sheet 23A can be prevented from being taken in. Thereby, it can suppress that the silver contained in the electrode of 24 A of contact parts reacts with a sulfur component (sulfurization), and causes the contact failure of 24 A of contact parts.

Further, as shown in FIGS. 5 and 6, the circuit portion 24 </ b> D and the harness 24 </ b> E of the membrane switch 24 are arranged beside the opening 26 </ b> B of the resin frame 26.
In addition, since the periphery of the opening 26B is one step higher, it is possible to prevent the load from the upper part from being applied to the circuit unit 24D and the harness 24E, and to protect the circuit unit 24D and the harness 24E.

  Further, as shown in FIG. 3, a thermistor support member 25 is disposed under the thermistor 23 </ b> C of the seat heater 23. The thermistor support member 25 is made of a cushion member such as urethane foam, and the thermistor support member 25 can protect the thermistor 23C.

  The rear cushion member 22 is placed on the rear portion of the resin frame 26. Here, the opening 26 </ b> B of the resin frame 26 is disposed at a position facing the opening 22 a of the rear cushion member 22.

As described above, after the front cushion member 21, the thermistor support member 25, the membrane switch 24, the seat heater 23, and the rear cushion member 22 are placed on the resin frame 26, the upper surface is covered with the skin material 20, and the skin material The end portion of 20 is wound around the lower surface of the resin frame 26 and fixed.
The opening 20 a formed in the skin material 20 is disposed at a position facing the opening 22 a of the rear cushion member 22 and the opening 26 B of the resin frame 26. As a result, through holes are formed in the sheet 3 through the opening 20a, the opening 22a, and the opening 26B.
The engaging member 17 that engages with the cover member 30 is attached to the through hole.

  As illustrated in FIG. 3, the cover member 30 includes a lid portion 31 and a downward extending portion 32 that extends downward from the lid portion 31.

The lid portion 31 has a substantially rectangular flat plate shape that closes a through hole formed in the rear portion 3 c of the sheet 3.
Note that the upper surface of the lid portion 31 may be slightly curved so as to be smoothly connected to the upper surface of the sheet 3 when the cover member 30 is attached to the engaging member 17.

  The downward extending portion 32 is a tongue-shaped portion that extends downward from a substantially central portion of the lower surface of the lid portion 31. A hole is formed in the lower end portion of the downward extending portion 32, and this hole is hooked on a protrusion formed on the lower surface of the resin frame 26. Thereby, it is possible to prevent the cover member 30 from being easily detached from the sheet 3.

In the seat 3 described above, the intake / exhaust port portion 24B of the membrane switch 24 is disposed through the through hole 26A of the resin frame 26, thereby preventing the intake / exhaust port portion 24B of the membrane switch 24 from being crushed by the load of the occupant. it can. Thereby, the intake / exhaust function of the membrane switch 24 can be ensured, and the operation accuracy of the membrane switch 24 can be improved.
Further, damage to the intake / exhaust port 24B of the membrane switch 24 can be prevented.

In the seat 3, the intake / exhaust port portion 24 </ b> B passes through the through-hole 26 </ b> A of the resin frame 26 and is disposed below the resin frame 26, so that outside air can be easily taken in from the intake / exhaust port portion.
Further, since the intake / exhaust port portion 24B can be separated from the rubber sheet 23A, it is possible to prevent the composition material (sulfur component, etc.) of the rubber sheet 23A from being taken in from the intake / exhaust port portion 24B.

  In the seat 3, the membrane switch 24 can be protected by sandwiching the membrane switch 24 between the rubber sheet 23 </ b> A and the front cushion member 21.

Further, in the sheet 3, the elasticity can be enhanced by the rubber sheet 23A containing a sulfur component. Thereby, the seating feeling of the seating part 3a of the seat 3 can be improved.
When the rubber sheet 23A contains a sulfur component, the sulfur component is taken in from the intake / exhaust port portion 24B by separating the distance between the intake / exhaust port portion 24B and the rubber sheet 23A. It can be suppressed.

Further, the seat 3 can improve the comfort of the seat 3 by including the seat heater 23 disposed on the membrane switch 24.
By doing so, it is possible to prevent dew condensation caused by the heat of the seat heater 23 from entering the inside of the membrane switch 24. Thereby, corrosion of the membrane switch 24 can be suppressed, and the lifetime of the membrane switch 24 can be extended.
Even when the seat heater 23 is provided on the seat 3, the intake / exhaust port portion 24B of the membrane switch 24 can be disposed at a position not in contact with the seat heater 23, so that the intake / exhaust port portion 24B is deteriorated by heat. Can be suppressed.

The present invention is not limited to the above embodiment.
For example, the intake / exhaust port portion 24 </ b> B of the membrane switch 24 may be accommodated in the through hole 26 </ b> A of the resin frame 26.
Further, the through hole 26A through which the intake / exhaust port portion 24B of the membrane switch 24 is inserted is not limited to the lower portion of the resin frame 26, and may be formed in the side portion.
The first cushion member may be a cushion material made of a material other than rubber such as urethane foam.
Further, the vehicle seat according to the present invention is not limited to a motorcycle, but can be applied to a seat of a vehicle (including three or more vehicles), a ship, an aircraft, and the like.

1 motorcycle 3 seat (vehicle seat)
3a Seating portion 3b Inclined portion 3c Rear portion 17 Engaging member 20 Skin material 20a Opening portion 21 Front cushion member (second cushion member)
22 rear cushion member 22a opening 23 seat heater 23A rubber sheet (first cushion member)
23B Heater wire 23C Thermistor 24 Membrane switch (seat sensor)
24A Contact part 24B Intake / exhaust port part 24C Communication part 24D Circuit part 24E Harness 24F Connector 25 Thermistor support member 26 Resin frame (support member)
26A Through-hole 26B Opening 30 Cover member 31 Lid 32 Downward extension

Claims (6)

A support member having a through hole formed therein;
A first cushion member disposed above the support member;
A seating sensor disposed between the support member and the first cushion member,
The seating sensor is
A contact portion;
An intake / exhaust port communicating with the contact point;
A harness connected to the contact portion,
One end of the seating sensor is provided with the harness on one side and the intake / exhaust port on the other side, and is divided into two branches.
The vehicle seat, wherein the intake / exhaust port portion is passed through the through hole of the support member.   The vehicle seat according to claim 1, wherein the harness is disposed so as to be shifted from the intake / exhaust port portion in a left-right direction of the seat.   The vehicle seat according to claim 1, wherein the intake / exhaust port portion is disposed below the support member through the through hole of the support member. A second cushion member disposed on the support member;
The first cushion member is disposed above the second cushion member,
The vehicle seat according to any one of claims 1 to 3, wherein the seating sensor is arranged between the first cushion member and the second cushion member.   The vehicle seat according to any one of claims 1 to 4, wherein the first cushion member includes a rubber material containing a sulfur component.   The vehicle seat according to claim 1, further comprising a seat heater disposed on the seating sensor.

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