JP6889367B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat in which a heater is arranged between a cushion pad and an epidermis.

Some vehicle seats equipped with a heater inside the seat have the heater arranged at a position directly below the skin covering the cushion pad. The epidermis used for a vehicle seat is generally composed of a plurality of pieces (epidermis pieces) sewn together. When manufacturing a vehicle seat in which a heater is provided directly below the skin, the heater wires that make up the heater and the electric wires that are connected to the heater wires are attached to each skin piece, and then the skin pieces are attached to each other. It will be sewn. At this time, if the heater wire or the electric wire straddles the sutured portion, there is a risk that these conductors will be broken. These defects become apparent when the suture pattern of the epidermis piece is changed according to the change in the seat design.

As a method of avoiding the disconnection of the conducting wire at the time of suturing the epidermis piece, for example, the technique described in Patent Document 1 can be mentioned. Explaining the technique described in Patent Document 1, a groove is provided in the cushion pad covered with the epidermis, and the portion of the epidermis near the suture line of the epidermis piece is pulled into the groove to form a metal wire exposed in the groove. hook. Further, a heater is provided at a position directly below the skin, and the heater wire in the heater is drawn into the groove. The heater wire drawn into the groove is connected to the metal wire via a conductive connecting member. By using such a technique, even if the heater wire is attached to each epidermis piece, the heater wire does not straddle the suture line of the epidermis piece, so that it is possible to avoid the disconnection of the heater wire at the time of suturing the epidermis piece. Become.

Japanese Unexamined Patent Publication No. 2012-143318

However, in the technique described in Patent Document 1, the skin is arranged at a position directly above a connecting component (specifically, a connecting member or a metal wire) that is electrically connected to the heater wire. Therefore, when the occupant of the vehicle is seated on the seating seat described in Patent Document 1, a load (seating load) is applied to the connection portion between the heater wire and the connecting component, and if this is repeated, the conducting wire will be disconnected from the connecting component. There is a risk. Further, for example, when water or liquid spills on the sheet and the skin gets wet, water or liquid may come into contact with the connection portion between the heater wire and the connecting component, which may cause corrosion at the connection portion.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is for a vehicle in which a conducting wire that is in an energized state when using a heating heater arranged between the skin and a cushion pad is appropriately arranged. To provide a sheet.

According to the vehicle seat of the present invention, the problem is that the cushion pad, the skin covering the cushion pad, the heating heater arranged between the skin and the cushion pad, and the heating heater are energized when the heating heater is used. The epidermis has a conductor that is in a state, and the epidermis is a suture line formed by suturing the first epidermis piece and the second epidermis piece that are sewn together, and the first epidermis piece and the second epidermis piece. The conductor has a first conductor attached to the first epidermis piece and a second conductor attached to the second epidermis piece, and the first conductor and the second conductor Are located on opposite sides of the suture line and are electrically connected via a connecting portion, and are one of the cushion pads between the connecting portion and the epidermis in the thickness direction of the cushion pad. It is solved by arranging the parts.

In the vehicle seat of the present invention configured as described above, the conductors (specifically, the first conductor and the second conductor) attached to each skin piece are located at positions away from the suture line of the skin piece. It is electrically connected via a connection. Further, a part of the cushion pad is interposed between the connection portion and the skin in the thickness direction of the cushion pad. That is, a part of the cushion pad exists on the side where the skin is located when viewed from the connecting part, and the part covers the connecting part. This prevents the seating load when the occupant of the vehicle is seated on the seat from being applied to the connection part, and also prevents the connection part from coming into contact with water or liquid when the skin is wet with water or liquid. It becomes possible to do. As described above, it is possible to appropriately connect the conductors attached to each skin piece and appropriately maintain the connected state.

To describe a suitable configuration for the vehicle seat of the present invention, a groove formed along the suture line is provided in a portion of the cushion pad covered with the epidermis facing the suture line. It is preferable that the connecting portion is arranged at a position farther from the epidermis than the groove in the thickness direction so as to intersect the groove.
In the above configuration, the connection portion is arranged at a position farther from the skin than the groove (that is, the back side of the groove in the cushion pad). With such a configuration, it is possible to effectively suppress the seating load applied to the connecting portion when the occupant of the vehicle is seated on the seat. In addition, when the epidermis gets wet with water or liquid, it is possible to effectively prevent the connection portion from coming into contact with water or liquid.

To describe a suitable configuration for the vehicle seat of the present invention, the groove may be a hanging groove formed for suspending a portion of the epidermis on which the suture line is formed.
In the above configuration, the portion of the epidermis on which the suture line is formed is suspended in the suspension groove formed in the cushion pad. Further, the connecting portion is arranged at a position away from the epidermis than the hanging groove. With such a configuration, it is possible to appropriately maintain the connected state between the connecting portion and the conducting wire while separating the connecting portion from the suture line.

To describe a suitable configuration for the vehicle seat of the present invention, the conducting wire is an electric wire as a connecting portion arranged for electrically connecting the first conducting wire and the second conducting wire, and the electric wire is , It is preferable that the cushion pad extends in a direction intersecting both the thickness direction and the forming direction of the hanging groove.
In the above configuration, the electric wire forming the connecting portion extends in the cushion pad in the direction across the suspension groove on the back side of the suspension groove. With such a configuration, since the electric wire is inside the cushion pad, it is possible to protect the electric wire.

To describe a suitable configuration for the vehicle seat of the present invention, the conductor is an electric wire as a connecting portion arranged for electrically connecting the first conductor and the second conductor, and the cushion pad. Has a back surface located on the side opposite to the side facing the skin in the thickness direction, and the electric wire is located at a position farther from the skin than the back surface in the thickness direction, and is located in the thickness direction and said. It is preferable that the suspension groove extends in a direction intersecting both of the forming directions.
In the above configuration, the electric wire forming the connecting portion extends in the direction across the suspension groove at a position away from the skin surface from the back surface of the cushion pad. With such a configuration, since the electric wire is exposed, the electric wire can be easily handled, so that the arrangement work of the electric wire becomes easier.

To describe a suitable configuration for the vehicle seat of the present invention, the first conductor and the second conductor are heater wires forming a part of the heater, and the electric wire is the first of the heaters. It is preferable that the heater wire forms a portion other than the portion composed of the one conductor wire and the second conductor wire.
In the above configuration, the first conductor, the second conductor, and the electric wire are composed of the heater wire of the heater. With such a configuration, the number of parts can be further reduced as compared with a configuration in which the electric wire as the connecting portion is provided separately from the heater wire of the heater.

To describe a suitable configuration for the vehicle seat of the present invention, the first conductor and the second conductor are heater wires forming a part of the heater, and the electric wire is the heater wire of the heater. It is good to be separate.
In the above configuration, the electric wire as the connecting portion is provided as a separate member from the heater wire of the heater forming the first conductor and the second conductor. With such a configuration, the degree of freedom regarding the arrangement of the electric wires is increased, and the arrangement work of the electric wires becomes easier.

To describe a suitable configuration for the vehicle seat of the present invention, the conductor further includes a first conductor connecting wire connected to the first conductor and a second conductor connecting wire connected to the second conductor. It is preferable that the electric wire is connected to each of the first conductor connecting electric wire and the second conducting wire connecting electric wire.
In the above configuration, a first conductor connecting wire connected to the first conductor and a second conductor connecting wire connected to the second conductor are provided, respectively. Further, the electric wire as the connecting portion is connected to each of the first conductor connecting electric wire and the second conducting wire connecting electric wire. With such a configuration, the installation position of the electric wire as the connecting portion can be freely set by appropriately changing the position of the first conductor connecting electric wire and the position of the second conducting wire connecting electric wire. This makes the work of arranging the electric wires even easier.

To describe a suitable configuration for the vehicle seat of the present invention, it is preferable that each of the first conductor connecting electric wire and the second conducting wire connecting electric wire extends so as to penetrate the cushion pad in the thickness direction.
In the above configuration, the first conductor connecting wire and the second conductor connecting wire extend so as to penetrate the cushion pad. With such a configuration, the electric wire as the connecting portion can be easily arranged at a position farther from the skin than the back surface of the cushion pad.

To describe a suitable configuration for the vehicle seat of the present invention, the cushion pad has a back surface located on the side opposite to the side facing the skin in the thickness direction, and the electric wire has the back surface in the thickness direction. It should be fixed on the back side.
In the above configuration, the electric wire as the connecting portion is fixed to the back surface of the cushion pad. This makes it possible to stabilize the connection state between the connecting portion (electric wire) and the conducting wire.

According to the vehicle seat of the present invention, in a configuration in which a heater is arranged between the cushion pad and the epidermis, and a conducting wire that is energized when the heater is used is attached to each of the plurality of epidermis pieces, each epidermis piece. It is possible to properly connect the conductors attached to the above and to maintain the connected state appropriately.
Further, according to the vehicle seat of the present invention, it is effective that the seating load when the occupant of the vehicle is seated on the seat is applied to the connection portion for electrically connecting the conductors to each other. It becomes possible to suppress. In addition, when the epidermis gets wet with water or liquid, it is possible to effectively prevent the connection portion from coming into contact with water or liquid.
Further, according to the vehicle seat of the present invention, it is possible to appropriately maintain the connected state between the connecting portion and the conducting wire while separating the connecting portion from the suture line of the epidermis piece.
Further, according to the vehicle seat of the present invention, it is possible to protect the electric wire by having the electric wire forming the connecting portion in the cushion pad.
Further, according to the vehicle sheet of the present invention, since the electric wire is exposed on the back side of the cushion pad, the electric wire becomes easy to handle, and as a result, the arrangement work of the electric wire becomes easier.
Further, according to the vehicle sheet of the present invention, since the first conductor, the second conductor and the electric wire are composed of the heater wire of the heater, the electric wire is compared with the configuration in which the electric wire is prepared separately from the heater wire of the heater. , The number of parts is reduced.
Further, according to the vehicle sheet of the present invention, since the electric wire is provided as a member separate from the heater wire of the heater forming the first conductor and the second conductor, the degree of freedom regarding the arrangement of the electric wire is increased. , The work of arranging the electric wires becomes easier.
Further, according to the vehicle seat of the present invention, by appropriately changing the position of the first conductor connecting wire connected to the first conductor and the position of the second conductor connecting wire connected to the second conductor, the electric wire can be connected. The installation position can be freely set, and as a result, the work of arranging the electric wires becomes easier.
Further, according to the vehicle seat of the present invention, since the first conductor connecting electric wire and the second conducting wire connecting electric wire penetrate the cushion pad, the electric wire can be easily placed at a position farther from the skin than the back surface of the cushion pad. It becomes possible to arrange.
Further, according to the vehicle seat of the present invention, by fixing the electric wire to the back surface of the cushion pad, it is possible to stabilize the connection state between the electric wire which is the connecting portion and the conducting wire.

It is an overall view of the vehicle seat which concerns on one Embodiment of this invention. It is a figure which shows the frame of the vehicle seat. It is a figure which shows the positional relationship between a cushion pad and a heater wire of a heater. It is a figure which shows the structure of the epidermis which concerns on one Embodiment of this invention (the 1). It is a figure which shows the structure of the epidermis which concerns on one Embodiment of this invention (the 2). It is a figure which shows the 1st example about the structure for electrically connecting the heater wire of a heater. It is explanatory drawing of the connection method of the conducting wire extending from a heater wire, and an electric wire. It is explanatory drawing of the modification about the connection method of the conducting wire extending from a heater wire, and an electric wire. It is a figure which shows the 2nd example about the structure for electrically connecting the heater wire of a heater. It is a figure which shows the 3rd example about the structure for electrically connecting the heater wire of a heater. It is a figure which shows the 4th example about the structure for electrically connecting the heater wire of a heater. It is a figure which shows the variation of the method of connecting the conducting wire extending from a heater wire.

Hereinafter, one embodiment of the present invention (the present embodiment) will be described. Hereinafter, the seat mounted on the vehicle (vehicle seat) will be described with reference to a specific example of the vehicle seat according to the present embodiment. However, the present invention can also be applied to vehicle seats other than vehicle seats, such as motorcycles, or seats mounted on ships and aircraft.

In the following description, the "front-rear direction" is the front-rear direction of the vehicle seat, which is the direction that coincides with the traveling direction when the vehicle is traveling. The "seat width direction" is the width direction of the vehicle seat, which is the direction that coincides with the left-right direction as seen by the occupant seated on the vehicle seat. Further, the "vertical direction" is a vertical direction of the vehicle seat, and is a direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane. Further, the "thickness direction" means the thickness direction of the cushion pad 1 described later, and is the direction that coincides with the vertical direction when the vehicle seat is mounted on the vehicle.

In addition, the orientation, position, posture, etc. of each component described below are the contents in a state where the vehicle seat is mounted on the vehicle, unless otherwise specified.

<< Overall configuration of vehicle seats according to this embodiment >>
The overall configuration of the vehicle seat (hereinafter referred to as the vehicle seat S) according to the present embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view of the vehicle seat S. In the figure, the heater 4 is shown by a broken line. FIG. 2 is a perspective view showing a frame of the vehicle seat S. FIG. 3 is a plan view showing the positional relationship between the cushion pad 1 and the heater wire 4a of the heater 4. 4A and 4B are schematic views showing the configuration of the skin 2 according to the present embodiment, FIG. 4A is a side sectional view of the skin 2, and FIG. 4B is a schematic development view of the skin 2. FIG. 5 is a schematic cross-sectional view showing the configuration around the suspension groove 1a in the seat cushion S1.

As shown in FIG. 1, the vehicle seat S has a seat cushion S1, a seat back S2, and a headrest S3. The seat cushion S1 is configured by placing the cushion pad 1 shown in FIG. 3 on the seat cushion frame F1 shown in FIG. 2 and covering the surface of the cushion pad 1 with the skin 2.

As shown in FIG. 2, the seat cushion frame F1 has a pair of left and right side frames Fs and a pan frame Fp connecting the front ends of the side frames Fs to each other. A support spring Fr extending in the seat width direction is erected between the side frames Fs. The support spring Fr is composed of, for example, an S spring, is located behind the pan frame Fp, and is provided in plurality along the front-rear direction.

The cushion pad 1 is a pad member made of urethane foam or the like, and is molded into a predetermined shape. A plurality of linearly formed suspension grooves 1a are formed on the upper surface of the cushion pad 1. The hanging groove 1a is a groove formed for suspending a part of the skin 2 in order to stretch the skin 2 when the cushion pad 1 is covered with the skin 2, and is formed in the seat width direction or as shown in FIG. It extends in the front-back direction.

In the following, the upper surface and the side surface (the surface facing the skin 2 in the thickness direction) of the cushion pad 1 are referred to as the facing surface 1s, and the lower surface of the cushion pad 1 (the side facing the skin 2 in the thickness direction) is opposite to the side facing the skin 2. The surface located on the side) is referred to as the back surface 1t.

The epidermis 2 is composed of a plurality of fragmented epidermis (hereinafter, epidermis piece 2a). Each of the plurality of skin pieces 2a is made of leather or cloth. Further, as shown in FIG. 4A, a slab 5 is sewn on the back side of each skin piece 2a. The slab 5 is made of a breathable urethane slab and is integrated with the skin piece 2a.

The epidermis 2 is formed by suturing a plurality of epidermis pieces 2a as shown in FIG. 4B. Therefore, the epidermis 2 is provided with a suture line L (indicated by a thick broken line in FIG. 4B) formed by suturing the epidermis pieces 2a to each other. The suture line L is formed to be linearly long. The number, arrangement position, length, and formation direction of the stitch lines L are not limited to those shown in FIG. 4A, and may be arbitrarily designed according to the sheet design.

Here, the configuration of the cushion pad 1 will be described again from the relationship with the skin 2. When the cushion pad 1 is covered with the skin 2, the portion of the cushion pad 1 located directly below the suture line L is described above. There is a suspension groove 1a. That is, in the cushion pad 1 covered with the skin 2, a suspension groove 1a is provided along the suture line L at a portion facing the suture line L.

As shown in FIG. 5, in the suspension groove 1a, a portion of the epidermis 2 on which the suture line L is formed (strictly speaking, a terminal portion of two epidermis pieces 2a that are overlapped and sutured) is provided. Suspended. The portion of the skin 2 suspended in the suspension groove 1a is fixed in the suspension groove 1a by a known fixing means.

More specifically, in the configuration shown in FIG. 5, the insert wire 3 is arranged along the suspension groove 1a at the bottom of the suspension groove 1a in the cushion pad 1. Then, the portion of the skin 2 suspended in the suspension groove 1a is hooked to the portion of the insert wire 3 exposed in the suspension groove 1a. As a result, the portion of the epidermis 2 on which the suture line L is formed is fixed in the suspension groove 1a.

As shown in FIG. 1, a heating heater 4 as a seat heating device is arranged in the seat cushion S1 according to the present embodiment. The heating heater 4 mainly includes a heater wire 4a (heating wire) that heats by energizing. As shown in FIG. 5, the heater wire 4a is arranged between the skin 2 and the cushion pad 1 in the thickness direction. That is, in the present embodiment, the heating heater 4 is arranged at a position directly below the skin 2, and the surface (seat surface) of the seat cushion S1 can be effectively heated.

As shown in FIGS. 3 and 5, a lead wire 6 for supplying power to the heater 4 is provided in the seat cushion S1. The conducting wire 6 includes a heater wire 4a forming a part of the heater wire 4, an electric wire 7 electrically connected to the heater wire 4a, and a cable forming a power transmission path from a power source (not shown) to the heater wire 4a. include. These conductors 6 are energized when the heater 4 is used. Then, the heater wire 4a is heated when the various conducting wires 6 are energized.

<< About the configuration of the heater >>
Next, the configuration of the heater 4 installed in the seat cushion S1 of the vehicle seat S will be described with reference to FIGS. 3 to 5.

In explaining the configuration of the heater 4, the configurations of the cushion pad 1 and the skin 2 will be described again. Two suspension grooves 1a are formed in the front-rear direction in the central portion of the cushion pad 1 in the seat width direction. .. Here, the central portion of the cushion pad 1 in the seat width direction is divided into three regions (front region 11, central region 12, and rear region 13) with the suspension groove 1a as a boundary in the front-rear direction.

The skin 2 has skin pieces 2a corresponding to each region of the central portion of the cushion pad 1 divided into three in the seat width direction for each region. Specifically, the plurality of epidermis pieces 2a constituting the epidermis 2 include an epidermis piece 2a covering the anterior region 11 (hereinafter, anterior epidermis piece 21) and an epidermis piece 2a covering the central region 12 (hereinafter, the central epidermis). The piece 22) and the epidermis piece 2a (hereinafter, the posterior epidermis piece 23) covering the posterior region 13 are included.

The rear end portion of the anterior epidermis piece 21 and the front end portion of the central epidermis piece 22 are sutured, and a suture line L along the seat width direction is formed at a position where the two epidermis pieces 21 and 22 overlap. In the relationship between the anterior epidermis piece 21 and the central epidermis piece 22, the anterior epidermis piece 21 corresponds to the first epidermis piece and the central epidermis piece 22 corresponds to the second epidermis piece. Here, the first epidermis piece and the second epidermis piece are determined for convenience in defining the relationship between the two epidermis pieces 2a. Specifically, when one of the two epidermis pieces 2a is set as the first epidermis piece, the other is inevitably the second epidermis piece.

Similarly, the rear end portion of the central epidermis piece 22 and the front end portion of the posterior epidermis piece 23 are sutured, and a suture line L along the seat width direction is formed at a position where the two epidermis pieces 22 and 23 overlap. In the relationship between the central epidermis piece 22 and the posterior epidermis piece 23, the central epidermis piece 22 corresponds to the first epidermis piece and the posterior epidermis piece 23 corresponds to the second epidermis piece.

The heater 4 is arranged between the skin 2 and the cushion pad 1 configured as described above. Strictly speaking, as shown in FIG. 3, a heater wire 4a constituting the heating heater 4 is arranged between the central portion of the cushion pad 1 in the seat width direction and the skin piece 2a located immediately above the cushion pad 1.

More specifically, as shown in FIG. 4A, the heater wire 4a is inserted into the slab 5 sewn on the back side of each of the front skin piece 21, the central skin piece 22, and the rear skin piece 23. That is, in the present embodiment, there are a plurality of skin pieces 2a to which the heater wires 4a are attached.

Here, in the relationship between the anterior epidermis piece 21 and the central epidermis piece 22, the heater wire 4a attached to the anterior epidermis piece 21 corresponds to the first conducting wire, and the heater wire 4a attached to the central epidermis piece 22 is Corresponds to the second conductor. Further, in the relationship between the central epidermis piece 22 and the posterior epidermis piece 23, the heater wire 4a attached to the central epidermis piece 22 corresponds to the first conducting wire, and the heater wire 4a attached to the posterior epidermis piece 23 is the first. Corresponds to two conductors.

The first conductor and the second conductor are determined for convenience in distinguishing the heater wire 4a attached to each skin piece 2a. Specifically, when the heater wire 4a attached to one of the two epidermis pieces 2a (first epidermis piece) is set as the first conducting wire, it is attached to the other epidermis piece 2a (second epidermis piece). The heater wire 4a is inevitably the second conductor.

As shown in FIG. 4B, the heater wire 4a inserted into the slab 5 is arranged so as to meander along the surface of the slab 5 (strictly speaking, the surface in the thickness direction). Further, the heater wire 4a is separated between the skin pieces 2a. Specifically, the heater wire 4a (first conductor) attached to the front skin piece 21 and the heater wire 4a (second conductor) attached to the central skin piece 22 are the two skin pieces 21 and 22. They are located on opposite sides of the suture line L formed between them. Further, the heater wire 4a (first conductor wire) attached to the central skin piece 22 and the heater wire 4a (second conductor wire) attached to the rear skin piece 23 are formed between the two skin pieces 22 and 23. They are located on opposite sides of the suture line L.

The heater wires 4a located on opposite sides of the suture line L are electrically connected to each other via a connecting portion described later. As a result, when power is supplied from a heater power supply (not shown), both of the two heater wires 4a located on opposite sides of the suture line L are energized.

<< Heater wire connection structure >>
A connection structure for electrically connecting two heater wires 4a located on opposite sides of the suture line L will be described with reference to a plurality of examples (first to fourth examples). The connection structure for connecting the heater wires 4a attached to each of the front skin piece 21 and the central skin piece 22 and the heater wires 4a attached to each of the central skin piece 22 and the rear skin piece 23 are connected to each other. The connection structure for connecting is substantially the same. Therefore, in the following, only the connection structure for connecting the heater wires 4a attached to each of the front skin piece 21 and the central skin piece 22 will be described.

(Connection structure of the first example)
The connection structure of the first example will be described with reference to FIGS. 3, 5 and 7. FIG. 6 is a diagram showing a method of connecting the conducting wire extending from the heater wire 4a and the electric wire 7, and is a diagram showing a detailed structure of a portion surrounded by a broken line in FIG. FIG. 7 is a diagram showing a modified example of a method of connecting the conducting wire extending from the heater wire 4a and the electric wire 7.

In the first example, as shown in FIGS. 3 and 5, the electric wire 7, the first conducting wire connecting wire 8 and the second conducting wire connecting electric wire 9 are used as the conducting wire 6 for electrically connecting the heater wires 4a to each other. Has been done. These conductors 6 are separate from the heater wire 4a of the heater 4. The first conductor connecting electric wire 8 and the second conducting wire connecting electric wire 9 are made of a general electric wire (for example, a coated conducting wire). The first conductor connecting wire 8 is joined to the end of the heater wire 4a attached to the front skin piece 21 (specifically, the end of the heater wire 4a located on the rear end side of the front skin piece 21). There is. The second conductor connecting wire 9 is joined to the end of the heater wire 4a attached to the central skin piece 22 (specifically, the end of the heater wire 4a located on the front end side of the central skin piece 22). ..

As for the joining method of each of the first conducting wire connecting wire 8 and the second conducting wire connecting wire 9 and the heater wire 4a, for example, a joining method by caulking or soldering can be used.

Further, each of the first conductor connecting wire 8 and the second conducting wire connecting wire 9 extends so as to penetrate the cushion pad 1 in the thickness direction. Specifically, as shown in FIG. 5, through holes 1b penetrating the cushion pad 1 are provided at positions near the suspension groove 1a in each of the front region 11 and the central region 12. The first conductor connecting wire 8 and the second conductor connecting wire 9 are passed through the through hole 1b from the upper surface side of the cushion pad 1. As shown in FIG. 5, the first conductor connecting wire 8 and the second conducting wire connecting wire 9 passed through the through hole 1b project below the lower surface of the cushion pad 1 (that is, the back surface 1t).

The electric wire 7 is made of a metal wire having a slightly large diameter. Then, the electric wire 7 functions as a connecting portion for electrically connecting the heater wires 4a to each other in the first example. Specifically, as shown in FIG. 5, the electric wire 7 is arranged on the back side of the cushion pad 1 (a position farther from the skin 2 than the back surface 1t of the cushion pad 1 in the thickness direction). At such an arrangement position, the electric wire 7 is connected to each of the first conductor connecting electric wire 8 and the second conducting wire connecting electric wire 9 protruding below the back surface 1t of the cushion pad 1.

As shown in FIG. 5, the electric wire 7 is arranged so as to cross the suspension groove 1a at a position below the back surface 1t of the cushion pad 1. That is, the electric wire 7 is located at a position farther from the skin 2 than the suspension groove 1a in the thickness direction, and is arranged so as to intersect the suspension groove 1a. Strictly speaking, the electric wire 7 extends in a direction intersecting both the thickness direction and the formation direction of the suspension groove 1a (specifically, the seat width direction).

The electric wire 7 may be arranged so that its extending direction is orthogonal to the hanging groove 1a, or the electric wire 7 is inclined with respect to the hanging groove 1a (that is, with respect to the hanging groove 1a). It may be arranged (so that the angle is acute or obtuse).

One end of the electric wire 7 is located below the back surface 1t of the front region 11 of the cushion pad 1 and is joined to the end of the first conductor connecting electric wire 8 protruding from the through hole 1b. Similarly, the other end of the electric wire 7 is located below the back surface 1t of the central region 12 of the cushion pad 1 and is joined to the end of the second conductor connecting electric wire 9 protruding downward from the through hole 1b. ..

As for the connection method between each of the first conductor connection wire 8 and the second conductor connection wire 9 and the wire 7, for example, the connection method shown in FIG. 6 can be used, and specifically, both wires are caulked. After that, the joint may be joined with solder, and then the joint portion may be covered with a heat shrinkable tube K.

As for the connection method between each of the first conductor connection electric wire 8 and the second conductor connection electric wire 9 and the electric wire 7, the connection method shown in FIG. 7 can also be used. Explaining the connection method shown in FIG. 7, the ends of the first conductor connecting wire 8 and the second conducting wire connecting wire 9 protruding downward from the through hole 1b are assembled to the block-shaped connector C. An insertion hole is formed in the connector C, and the ends of the first conductor connecting wire 8 and the second conducting wire connecting wire 9 are inserted into the insertion hole. Further, as shown in FIG. 7, the connector C is formed with a recess formed in a substantially columnar shape. The end of the electric wire 7 is fitted into this recess.

Further, in the connector C, the above-mentioned insertion holes and recesses communicate with each other, and in a state where the ends of the first conductor connection wire 8 and the second conductor connection wire 9 are inserted into the insertion holes, the first conductor connection wire 8 and a part of the second conductor connecting wire 9 are exposed facing the recess. When the electric wire 7 is fitted into the recess in such a state, the electric wire 7 comes into contact with the first conductor connecting electric wire 8 and the second conducting wire connecting electric wire 9 and is electrically connected.

The connection method between each of the first conductor connection electric wire 8 and the second conductor connection electric wire 9 and the electric wire 7 is not limited to the method shown in FIGS. 6 and 7, and other connection methods may be used.

As described above, in the first example, the electric wire 7 as the connecting portion is located on the side opposite to the skin 2 with the cushion pad 1 sandwiched between them. In other words, a part of the cushion pad 1 is arranged between the electric wire 7 and the skin 2 in the thickness direction. With such a configuration, it is possible to suppress the load (seating load) applied to the seat cushion S1 when the occupant of the vehicle is seated on the vehicle seat S from being transmitted to the electric wire 7. As a result, the electric wire 7 is prevented from falling off or damaged due to the seating load.

Further, since the cushion pad 1 exists above the electric wire 7, even when the skin 2 is wet with water or liquid, for example, the electric wire 7 is prevented from coming into contact with water or liquid, and the electric wire caused by this is suppressed. It is possible to prevent the progress of corrosion of 7.

In the first example, the electric wire 7 is fixed to the back surface 1t of the cushion pad 1. The fixing method is not particularly limited, and for example, it may be bonded with an adhesive, or it may be fixed with a fixing tool such as a clip. Further, the portion where the electric wire 7 is fixed may be recessed in the back surface 1t, and the electric wire 7 may be arranged in the recess.

Further, when the cushion pad 1 in which the electric wire 7 is fixed to the back surface 1t is placed on the seat cushion frame F1, the electric wire 7 is placed on a predetermined portion (specifically, the pan frame Fp or the like) in the seat cushion frame F1. It will be placed at a position away from the support spring Fr). Further, the portion of the seat cushion frame F1 facing the electric wire 7 may be recessed on the side opposite to the side where the electric wire 7 is located to form a recessed portion.

(Connection structure of the second example)
The connection structure of the second example will be described with reference to FIG. FIG. 8 is an explanatory diagram of the connection structure of the second example. In FIG. 8, among the connection structures of the second example, the members and parts common to the connection structure of the first example are designated by the same reference numerals as those of FIG.

In the second example, as shown in FIG. 8, the electric wire 7 is inserted in the cushion pad 1, and specifically, it is inserted between the bottom of the suspension groove 1a and the back surface 1t in the thickness direction. .. The electric wire 7 extends in a direction intersecting both the thickness direction and the formation direction of the suspension groove 1a (specifically, the seat width direction) in the cushion pad 1. That is, in the second example, the electric wire 7 is arranged so as to cross the suspension groove 1a below the suspension groove 1a in the cushion pad 1.

Further, in the second example, the first conductor connecting wire 8 and the second conducting wire connecting wire 9 do not penetrate the cushion pad 1 and are interrupted at an intermediate position of the cushion pad 1 in the thickness direction. The lower ends of each of the first conductor connecting wire 8 and the second conducting wire connecting wire 9 are located at positions where the wires 7 are arranged in the thickness direction. Then, in the second example, as shown in FIG. 8, the electric wire 7 is joined to each of the first conductor connecting wire 8 and the second conducting wire connecting wire 9 in the cushion pad 1. Thereby, in the second example, it is possible to protect the electric wire 7 by covering it with the cushion pad 1.

In the above points, the second example is different from the first example, but other configurations are common to the first example. As can be seen from FIG. 8, in the second example as well, a part of the cushion pad 1 is arranged between the electric wire 7 and the skin 2 in the thickness direction as in the first example.

(Connection structure of the third example)
The connection structure of the third example will be described with reference to FIG. FIG. 9 is an explanatory diagram of the connection structure of the third example. In FIG. 9, among the connection structures of the third example, the members and parts common to the connection structure of the first example are designated by the same reference numerals as those of FIG.

In the third example, the first conductor connecting wire 8 and the second conducting wire connecting wire 9 used in the first example and the second example are not used. Instead, in the third example, the ends of the heater wires 4a attached to each of the front skin piece 21 and the central skin piece 22 are extended and extended through the through holes 1b to the back side of the cushion pad 1.

Then, in the third example, the heater wires 4a extending to the back side of the cushion pad 1 are joined to each other on the back side of the cushion pad 1. That is, in the third example, the heater wire 4a forming a portion of the heating heater 4 other than the portion formed by the heater wire 4a attached to the front skin piece 21 and the central skin piece 22 is the front skin piece 21 and the center. It functions as an electric wire for electrically connecting the heater wires 4a attached to the skin piece 22 to each other.

To explain in an easy-to-understand manner, in the third example, a portion of the heater wire 4a that wraps around the back side of the cushion pad 1 (hereinafter, the back side portion 4b of the pad) is provided as a connecting portion. Then, the back side portion 4b of the pad extending from the heater wire 4a (first conductor wire) attached to the front skin piece 21 and the back side portion 4b of the pad extending from the heater wire 4a (second conductor wire) attached to the central skin piece 22. And are joined on the back side of the cushion pad 1.

In the above points, the third example is different from the first example, but other configurations are common to the first example. As can be seen from FIG. 9, also in the third example, a part of the cushion pad 1 is arranged between the pad back side portion 4b as the connecting portion and the skin 2 in the thickness direction.

(Connection structure of the 4th example)
The connection structure of the fourth example will be described with reference to FIG. FIG. 10 is an explanatory diagram of the connection structure of the fourth example. In FIG. 10, among the connection structures of the fourth example, the members and parts common to the connection structure of the first example are designated by the same reference numerals as those of FIG.

In the fourth example, as in the third example, the first conductor connecting wire 8 and the second conducting wire connecting wire 9 are absent, and the ends of the heater wires 4a attached to the front skin piece 21 and the central skin piece 22 are extended. I'm letting you. Further, as shown in FIG. 10, the extended heater wire 4a is further extended in the cushion pad 1. More specifically, the portion of the heater wire 4a that extends inside the cushion pad 1 (hereinafter, the portion that extends inside the pad 4c) is located below the suspension groove 1a (position opposite to the skin 2) in the thickness direction. ) Is extended.

In the fourth example, as shown in FIG. 10, the in-pad extension portions 4c of each heater wire 4a are joined to each other in the cushion pad 1. That is, in the fourth example, the heater wire 4a (specifically, in the pad) forming a portion of the heating heater 4 other than the portion formed by the heater wire 4a attached to the front skin piece 21 and the central skin piece 22. The extending portion 4c) functions as an electric wire for electrically connecting the heater wires 4a attached to the front skin piece 21 and the central skin piece 22.

To explain in an easy-to-understand manner, in the fourth example, the in-pad extension portion 4c is provided as a connection portion, and the in-pad extension portion 4c extending from the heater wire 4a (first conductor wire) attached to the front skin piece 21 is provided. And the extension portion 4c in the pad extending from the heater wire 4a (second conductor wire) attached to the central skin piece 22, the suspension groove 1a and the back surface 1t in the cushion pad 1, strictly speaking, in the thickness direction. It is joined between.

In the above points, the fourth example is different from the first example, but other configurations are common to the first example. As can be seen from FIG. 10, also in the fourth example, a part of the cushion pad 1 is arranged between the in-pad extending portion 4c as the connecting portion and the skin 2 in the thickness direction.

<< Other Embodiments >>
In the above-described embodiment, a configuration example of the vehicle seat of the present invention has been mainly described. However, the above embodiments are for facilitating the understanding of the present invention and do not limit the present invention. That is, the present invention can be modified and improved without deviating from the gist thereof, and it goes without saying that the present invention includes an equivalent thereof.

Further, in the above-described embodiment, the heater 4 is provided in the seat cushion S1 of the vehicle seat S. That is, in the above-described embodiments (first to fourth examples), the structure for connecting the heater wires 4a of the heaters 4 installed in the seat cushion S1 has been described. However, the present invention is not limited to this, and the heater 4 may be provided on the seat back S2. The connection structure described above can also be used when connecting the heater wires 4a of the heater 4 to each other.

Further, in the above-described embodiment, the connection structure for connecting the heater wires 4a located on opposite sides of the suture line L of the epidermis piece 2a has been described. However, only one of the two conductors 6 located on opposite sides of the suture line L is the heater wire 4a, and the other is not the heater wire 4a (heating wire), for example, a power feeding cable. There may be. The above-mentioned connection structure can also be used when connecting the cable and the heater wire 4a.

Further, in the above-described embodiment (specifically, the first example and the second example), the first conductor connecting electric wire 8 and the second conducting wire connecting electric wire 9 are connected via the electric wire 7. That is, in the first example and the second example, each of the first conductor connecting wire 8 and the second conducting wire connecting wire 9 is connected to the wire 7. However, the present invention is not limited to this, and the first conductor connecting wire 8 and the second conductor connecting wire 9 may be connected by using the joints D1 and D2 shown in FIG. FIG. 11 is a diagram showing a method of connecting the first conductor connecting wire 8 and the second conducting wire connecting wire 9 using the joints D1 and D2.

Explaining the connection method shown in FIG. 11, the joint D1 is attached to the terminal of the first conductor connecting wire 8, and the joint D2 is attached to the terminal of the second conducting wire connecting wire 9. The two joints D1 and D2 are made of couplers that can be inserted and removed from each other. Therefore, when one joint D1 is inserted into the other joint D2 and both joints D1 and D2 are connected, the first conductor connecting wire 8 and the second conductor connecting wire 9 are electrically connected. The connection method shown in FIG. 11 is also applicable to the case of connecting each of the first conductor connection wire 8 and the second conductor connection wire 9 to the wire 7. Further, the same method can be applied to the case of connecting electric wires extending from the heater wire 4a (specifically, the pad back side portion 4b of the third example and the pad in-pad extension portion 4c of the fourth example). ..

1 Cushion pad 1a Suspension groove (groove)
1b Through hole 1s Facing surface 1t Back surface 2 Skin 2a Skin piece 3 Insert wire 4 Heater 4a Heater wire 4b Pad back side (electric wire)
4c Pad extension (electric wire)
5 Slab 6 Conductor 7 Electric wire (connection)
8 1st conductor connection wire 9 2nd conductor connection wire 11 Front area 12 Central area 13 Rear area 21 Front skin piece 22 Central skin piece 23 Rear skin piece C Connector D1, D2 Joint F1 Seat cushion frame Fp Pan frame Fr Support spring Fs Side frame K Heat shrinkable tube L Suture line S Vehicle seat (vehicle seat)
S1 Seat cushion S2 Seat back S3 Headrest

Claims (10)

Cushion pad and
The epidermis covering the cushion pad and
A heater arranged between the skin and the cushion pad,
It has a conducting wire that is energized when the heater is used.
The epidermis includes a first epidermis piece and a second epidermis piece that are sutured to each other, and a suture line formed by suturing the first epidermis piece and the second epidermis piece.
The conductor has a first conductor attached to the first epidermis piece and a second conductor attached to the second epidermis piece.
The first conductor and the second conductor are located on opposite sides of the suture line and are electrically connected via a connecting portion.
A vehicle seat characterized in that a part of the cushion pad is arranged between the connection portion and the skin in the thickness direction of the cushion pad. A groove formed along the suture line is provided in a portion of the cushion pad covered with the epidermis so as to face the suture line.
The vehicle seat according to claim 1, wherein the connecting portion is arranged at a position farther from the epidermis than the groove in the thickness direction so as to intersect the groove. The vehicle seat according to claim 2, wherein the groove is a hanging groove formed for suspending a portion of the epidermis on which the suture line is formed. The conducting wire is an electric wire as the connecting portion arranged for electrically connecting the first conducting wire and the second conducting wire.
The vehicle seat according to claim 3, wherein the electric wire extends in the cushion pad in a direction intersecting both the thickness direction and the hanging groove forming direction. The conducting wire is an electric wire as the connecting portion arranged for electrically connecting the first conducting wire and the second conducting wire.
The cushion pad has a back surface located on the side opposite to the side facing the epidermis in the thickness direction.
The claim is characterized in that the electric wire is located at a position farther from the skin surface than the back surface in the thickness direction and extends in a direction intersecting both the thickness direction and the forming direction of the suspension groove. The vehicle seat according to 3. The first conductor and the second conductor are heater wires that form a part of the heater.
The vehicle sheet according to claim 4 or 5, wherein the electric wire is a heater wire forming a portion of the heating heater other than the portion formed by the first conductor and the second conductor. The first conductor and the second conductor are heater wires that form a part of the heater.
The vehicle seat according to claim 4 or 5, wherein the electric wire is separate from the heater wire of the heater. The conductor further includes a first conductor connecting wire connected to the first conductor and a second conductor connecting wire connected to the second conductor.
The vehicle sheet according to claim 7, wherein the electric wire is connected to each of the first conductor connecting electric wire and the second conducting wire connecting electric wire. The vehicle seat according to claim 8, wherein each of the first conductor connecting electric wire and the second conducting wire connecting electric wire extends so as to penetrate the cushion pad in the thickness direction. The cushion pad has a back surface located on the side opposite to the side facing the epidermis in the thickness direction.
The vehicle seat according to claim 9, wherein the electric wire is fixed to the back surface in the thickness direction.

Images