JP7284106B2 - Vehicle seat cushion body and vehicle seat - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle seat cushion body and a vehicle seat, and more particularly, when routing a harness in a long groove provided on the surface of a soft pad of a vehicle seat, the position of the long groove can be easily visually recognized. In addition, the present invention relates to a vehicle seat cushion body and a vehicle seat capable of stably holding the harness in the long groove while the method of assembling the harness into the long groove is simple.

2. Description of the Related Art Conventionally, in a seat cushion constituting a vehicle seat cushion body of a vehicle seat, harnesses interposed between electrical components and the like and switches and the like have been routed.
For example, Japanese Patent Laid-Open No. 2002-200002 discloses such a wiring arrangement for a harness, in which a notch is provided in the pad and the harness is assembled there.
More specifically, a seat cushion for a vehicle seat having a pad made of foam and a pan-shaped frame for supporting the pad, wherein the pad is interposed between an electrical component and a switch. A notch is formed into which the attached harness is pushed in and assembled.

With such a configuration, the harness can be assembled by pushing it into the notch formed in the pad, and the bands and clips for fixing the harness can be eliminated, thereby reducing the cost of the harness and simplifying the handling of the harness. can be improved. Moreover, the harness can be routed simply by connecting the electrical equipment and the like to the connector. Further, in this case, since the harness is embedded in the continuously formed notch, the wiring length of the harness can be shortened.
However, such a type in which a notch is provided in the pad has the following technical problems.

First, the assembling workability of the harness is poor. In more detail, if the pad is simply provided with a cut, the visibility of the cut position is poor, and work efficiency is low. In this case, if the diameter of the harness is small, the harness may drop out of the groove, degrading the assembling performance.

Secondly, the stability of the harness is poor. A certain depth of the cut is necessary to ensure stable retention, which adversely affects the processing cost of the pad and the assembling workability of the harness.
JP 2010-89640

In view of the above technical problems, an object of the present invention is to make the position of the long groove easily visible when routing the harness in the long groove provided on the surface of the soft pad of the vehicle seat, and to make the long groove easy to see. To provide a vehicle seat cushion body and a vehicle seat capable of stably holding the harness in a long groove while the assembly method of the harness is simple.

In order to achieve the above object, the vehicle seat cushion body of the present invention comprises:
A vehicle seat cushion body having a soft pad in which a harness is routed,
A long groove in which a harness is routed is formed on the surface of the soft pad,
A harness holding portion is formed in at least a part of the long groove,
The harness holding portion has a cross section that intersects the direction in which the long groove extends, the width of which narrows toward the surface of the soft pad, and the groove opening formed on the surface of the soft pad has a minimum width. configured,
A portion of the harness holding portion that constitutes at least one of the opposed side surfaces of the long groove constitutes an overhanging portion that approaches the other opposed side surface toward the groove opening, thereby allowing the harness to pass through the groove opening. The harness is held in the long groove by being pushed into the long groove.

According to the vehicle seat cushion body having the above configuration, when routing the harness in the long groove provided on the surface of the soft pad of the vehicle seat cushion body, the groove opening linearly extends on the surface of the soft pad. Thus, the position of the long groove is visible, and the cross section of the harness holding portion intersecting the extending direction of the long groove narrows toward the surface of the soft pad, so that the groove opening has the minimum width. Therefore, the portion of the harness holding portion that constitutes at least one of the opposed side surfaces of the long groove constitutes an overhanging portion that approaches the other opposed side surface toward the groove opening, thereby moving the harness into the groove. By pushing the harness into the long groove through the opening, the harness is held in the long groove, and the position of the long groove can be visually recognized when wiring the harness in the long groove provided on the surface of the soft pad of the vehicle seat cushion body. In addition, the harness can be stably held in the long groove while the method of assembling the harness into the long groove is simple.

Further, it is preferable that the length of the long groove of the harness holding portion in the extending direction, the width of the groove opening portion, and/or the groove depth L of the long groove are set according to the diameter of the harness. .
Furthermore, the groove depth L is preferably not more than twice the diameter of the harness.

Furthermore, the projecting portion has a difference between the width of the groove opening and the maximum width of the long groove so that the harness can be pulled into the groove bottom of the long groove and deformed when the harness is pushed into the long groove through the groove opening. may be set so that the harness is sandwiched and supported within the long groove by the projecting portion.

According to the vehicle seat cushion body having the above configuration, when routing the harness in the long groove provided on the surface of the soft pad of the vehicle seat cushion body, the groove opening linearly extends on the surface of the soft pad. Thus, the position of the long groove is visible, and the cross section of the harness holding portion intersecting the extending direction of the long groove narrows toward the surface of the soft pad, so that the groove opening has the minimum width. The portions of the soft pad portion that form opposing side surfaces of the long groove form projecting portions that are retractable and deformable to the groove bottom, and the projecting portions are retractable and deformable to the groove bottom of the long groove. , the difference between the width of the groove opening and the maximum width of the long groove is set so that when the harness is pushed into the long groove through the groove opening, the surface of the soft pad near the edge of the groove opening becomes soft. Even if the groove depth L of the long groove is not deepened, the width of the groove opening of the harness is increased by simply pushing the long groove into the long groove. In the seat cushion body, the position of the long groove is easily visible when wiring the harness in the long groove provided on the surface of the soft pad of the vehicle seat cushion body, and the harness is connected to the long groove. Although the assembling method is simple, it is possible to stably hold the harness in the long groove.

Furthermore, the cross-sectional shape of the long groove may be determined according to the frictional force generated between the surface of the soft pad and the outer peripheral surface of the harness when the harness is pushed into the long groove.
Further, the cross-sectional shape is preferably a substantially U shape that tapers toward the groove opening, and the groove bottom is preferably shaped along a part of the outer circumference of the harness.
Furthermore, it is preferable that the harness holding portions are alternately provided at both edges of the long groove in the extending direction of the long groove.

In addition, the harness holding portions may be provided facing each other at both edges of the long groove.
Further, the long groove may extend continuously from edge to edge of the soft pad, and a plurality of the harness holding portions may be installed at predetermined intervals in the extending direction of the long groove.
Further, a vehicle seat having a seat cushion and a seat back having a lower end connected to a rear end of the seat cushion, wherein the seat cushion and/or the seat back are any of claims 1 to 9. Alternatively, the vehicle seat may be a vehicle seat cushion body according to item 1 above.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6 by taking up a seat back 110 of an automobile as a specific example of a vehicle seat cushion body in which a harness H is routed. .
As shown in FIG. 1, the vehicle seat 10 of this embodiment is for a driver's seat or a passenger's seat. and a seat back 110 connected to the seat back. The seat cushion 100 is connected to a vehicle body floor (not shown) by a slide mechanism (not shown), so that the seat cushion 100 and the seat back 110 are slidable in the longitudinal direction of the seat by the slide mechanism. . A seat cushion frame (not shown) that constitutes the skeleton of the seat cushion 100 is provided inside the seat cushion 100 . A seat cushion pad 120 made of a foam material such as urethane is provided on the seat upper side of the seat cushion frame, and the seat cushion pad 120 is covered with a seat cushion skin 130 made of cloth or leather.

At the rear end of the seat cushion 100, a seat back 110 that supports the back of the occupant is arranged in an upright state. A seatback frame 160 that constitutes the skeleton of the seatback 110 is provided in the seatback 110, and the lower end of the seatback frame 160 is connected to the seat cushion frame via a conventionally known reclining mechanism 170. A seat back pad 140 made of a foam material such as urethane is provided on the seat front side of the seat back frame 160, and the seat back pad 140 is covered with a seat back skin 150 made of cloth or leather. A headrest 190 is attached to the upper end of the seat back 110 .

Seat back pad 140 is exemplified by a soft pad made of polyurethane, for example. As for the raw material of the polyurethane, known materials can be applied without limitation, and are selected in consideration of elasticity and the like in order to exhibit the function as a cushion pad. The width of the groove opening 20 of the long groove 16 can be widened by deforming the seat back pad 140 when it is attached to the long groove 16 formed on the surface of the seat back pad 140 . In addition, the material may be selected from the viewpoint that the cushion pad has good moldability and does not cause problems such as sticking when released from the mold.

The seat cushion 100 has side frames 180 on both left and right sides, and a seat back frame 160 within the seat back 110 is supported by a reclining mechanism 170 on the rear end of the side frame 180 so as to be reclinable.
According to the vehicle seat 10 configured as described above, the occupant sits on the seat cushion 100 while facing forward (direction F in FIG. 1), and rests the upper body on the seat back 110 from the back. ing.

As shown in FIG. 2, a harness H is provided on the back surface of the vehicle seat 10. As shown in FIG. More specifically, the harness H is arranged downward toward the vehicle floor at the rear portion of the seat back 110 . The harness H consists of a plurality of electrical wirings, covered with a corrugated tube, and having a coupler attached to the end thereof.

More specifically, as shown in FIG. 2, a vibration motor M for preventing the driver from falling asleep is installed at a predetermined position on the back side of the seat back pad 140, and the vibration generated by the vibration motor M is transmitted to the driver. It is designed to prevent the driver from falling asleep while driving. The vibration motor M is conventionally known, and although a detailed description is omitted, it is connected to a power source (for example, a battery) via a harness H, which will be described later. Vibration of the vibration motor M causes the wire harness H itself connected to the vibration motor M to vibrate. , the harness H, like the vibration motor M, is assembled in the long groove 16 of the seat back pad 140 without being directly fixed to the metal seat frame.

As shown in FIGS. 2 to 4, the surface 14 of the seat back pad 140 is formed with a long groove 16 in which the harness H is routed.
A harness holding portion 18 is formed in at least a part of the long groove 16, and the cross section of the harness holding portion 18 intersecting the extending direction of the long groove 16 narrows toward the surface 14 of the seat back pad 140, The groove opening 20 formed in the surface 14 of the seat back pad 140 is configured to have a minimum width.

The long groove 16 extends continuously downward from the vibration motor M to the edge 28 of the seat back pad 140 on the back surface of the seat back pad 140, and the harness holding portions 18 are spaced apart from each other by a predetermined distance d in the extending direction of the long groove 16. , multiple installations. As a modification, the long groove 16 may extend across from one edge of the seat back pad 140 to the other edge.
The predetermined interval d may be determined from the viewpoint of stably holding the harness H in the long groove 16. For example, the small curvature portion of the long groove 16 is arranged with a narrow interval, and the large curvature or linear portion is arranged with a narrow interval. , may be spaced apart.
As shown in FIG. 3(A), the harness holding portion 18 and the long groove 16 may be provided facing each other at both edges. Alternatively, as shown in FIG. 3(B), the harness holding portion 18 may 16 , they may be provided alternately in the extending direction of the long groove 16 .

The cross-sectional shape is a substantially U shape that tapers toward the groove opening 20 , and the groove bottom 26 is shaped along a part of the outer circumference of the harness H.
A portion of the harness holding portion 18 that constitutes at least one of the opposed side surfaces 22 of the long groove 16 constitutes an overhanging portion 24 that approaches the other opposed side surface 22 toward the groove opening 20, thereby allowing the harness H to move into the groove. The harness H is retained in the slot 16 by pushing it through the opening 20 and into the slot 16 .

The length of the long groove 16 of the harness holding portion 18 in the extending direction, the width W of the groove opening 20, and/or the groove depth L of the long groove 16 are set according to the diameter D of the harness H.
In particular, the groove depth L is two times or less the diameter D of the harness H.
For example, the diameter of the harness H including the armor material is φ7.0 mm to φ10.0 mm, the width of the groove opening 20 is 2 mm, and the groove depth L is 15 mm.

A method for manufacturing a seat back pad of the present invention includes at least the following steps.
A foaming raw material (for example, a polyurethane foam undiluted solution composition) is injected into the mold, and after foaming and curing, the mold is released, the molded product (seat back pad 140) is removed from the mold, and the resulting seat back is obtained. The vibration motor M is positioned and temporarily fixed on the surface of the pad 140 , and the harness H is assembled in the long groove 16 .

In particular, when molding the seat back pad, so-called waste resin 200 may be used to mold the harness holding portion 18 . More specifically, since the cross section of the harness holding portion 18 that intersects the extending direction of the long groove 16 is narrowed toward the groove opening 20, if the harness holding portion 18 is molded using only a mold, it will not be removed from the mold. At this time, there is a possibility that the projecting portion 24 of the harness holding portion 18 may be torn off and remain on the mold side.

As shown in FIG. 6, the waste resin 200 has a molded portion 210 formed in a complementary shape to the harness holding portion 18, and a magnet (not shown) provided on the back surface 220 so that it can be brought into close contact with the mold. The waste resin 200 is attached to the mold with a magnet, and urethane, which is a pad material, is foamed. It is possible to eliminate the possibility that the protruding portion 24 of the harness holding portion 18 is torn off and remains on the mold side as described above, and the waste resin 200 may be discarded after demolding.
By using such waste resin 200, even when the cross section intersecting the extending direction of the long groove 16 of the harness holding portion 18 is highly narrowed toward the groove opening 20, the above-described technique can be used. It is possible to avoid technical problems.

According to the vehicle seat 10 having the above configuration, when wiring the harness H in the long groove 16 provided on the surface 14 of the seat back pad 140 of the vehicle seat 10, the harness H is linearly formed on the surface 14 of the seat back pad 140. The extending groove opening 20 allows the position of the long groove 16 to be visually recognized (FIG. 4A), and the cross section of the harness holding portion 18 intersecting the extending direction of the long groove 16 is the surface 14 of the seat back pad 140. The width of the groove opening 20 becomes narrower toward toward the other opposing side surface 22 , thereby pushing the harness H through the groove opening 20 into the long groove 16 , the harness H is pushed into the groove opening 20 by the overhang 24 . When the harness H is routed in the long groove 16 provided on the surface 14 of the seat back pad 140 of the vehicle seat 10, the position of the long groove 16 is easily visible. In addition, the harness H can be stably held in the long groove 16 while the method of assembling the harness H into the long groove 16 is simple.

In particular, in the case of a large-diameter harness H in which double wires are bundled, by deforming the seat back pad 140 to widen the groove opening 20 and accommodate the harness H in the long groove 16 (FIG. 4(B)), Since the protruding portion 24 is not caught in the groove bottom portion 26 and the protruding portion 24 is maintained as it is, in a state where the harness H is applied to the groove bottom portion 26 of the long groove 16, the upper portion of the harness H is Since the protruding portion 24 protrudes, the protruding portion 24 prevents the harness H from slipping out of the long groove 16, so that the harness H can be stably held in the long groove 16 (FIG. 4(C)).

A second embodiment of the present invention will be described below with reference to FIG. In the following description, constituent elements similar to those of the first embodiment are given the same reference numerals, and the description thereof is omitted. Characteristic portions of the present embodiment will be described in detail below.
The feature of the second embodiment of the present invention resides in the harness holding portion 18. In the first embodiment, when the harness H is assembled into the long groove 16, the protruding portion 24 formed by the harness holding portion 18 is attached to the harness H. In this embodiment, the projecting portion 24 sandwiches and supports the harness H within the long groove 16 , thereby preventing the harness H from slipping out of the groove opening 20 . It is a point to stably hold.

More specifically, the cross-sectional shape of the long groove 16 is determined according to the frictional force generated between the surface 14 of the seat back pad 140 and the outer peripheral surface of the harness H when the harness H is pushed into the long groove 16 .
More specifically, the frictional force acting on the harness H is affected by the coefficient of friction determined by the material of the skin material surrounding the harness H and the force of pinching the harness H by the protruding portion 24. From the viewpoint of stably holding the harness H in the long groove 16, the cross-sectional shape of the long groove 16 may be determined by taking into consideration factors. is made small and the coefficient of friction is low, the degree of projection of the projecting portion 24 may be increased.

The difference between the width W of the groove opening 20 and the maximum width Wmax of the long groove 16 is set so that the projecting portion 24 can be pulled into the groove bottom 26 of the long groove 16 and deformed. When pushed into the long groove 16 through the harness 20 , the harness H is sandwiched and supported by the projecting portion 24 within the long groove 16 .

According to the vehicle seat 10 having the above configuration, when wiring the harness H in the long groove 16 provided on the surface 14 of the seat back pad 140 of the vehicle seat 10, the harness H is linearly formed on the surface 14 of the seat back pad 140. The extending groove opening 20 allows the position of the long groove 16 to be visually recognized (FIG. 5A), and the cross section of the harness holding portion 18 intersecting the extending direction of the long groove 16 is the surface 14 of the seat back pad 140. Since the groove opening portion 20 is configured to have the minimum width, the portions of the seat back pad 140 forming the opposite side surfaces 22 of the long groove 16 are pulled into the groove bottom portion 26 and deformed. 5(B)), and the width of the groove opening 22 and the maximum width of the long groove 16 Wmax so that when the harness H is pushed into the long groove 16 through the groove opening 20, the surface of the seat back pad 140 in the vicinity of the edge 28 of the groove opening 20 is exposed to the harness H of the seat back pad 140. Even if the groove depth L of the long groove 16 is not deepened, the width of the groove opening 20 is expanded by simply pushing the harness H into the long groove 16. In the long groove 16, both overhanging portions 24 are sandwiched and supported (FIG. 5(C)). The position can be easily visually recognized, and the harness H can be stably held in the long groove 16 while the method of assembling the harness H into the long groove 16 is simple.

Although the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and changes without departing from the scope of the present invention.
For example, in the present embodiment, the seat back 110 of an automobile is taken up as a specific example of the seat cushion body for a vehicle, and the harness H connected to the vibration motor M installed on the back surface of the seat back 110 has been described. without being limited to the harness H connected to the electrical equipment installed in the seat cushion 100 of the automobile, and in some cases, the harness routed so as to straddle the seat back 110 and the seat cushion 100 It can be applied to H.
For example, in the present embodiment, as a specific example, the harness H connected to the vibration motor M installed in the seat back 110 of the driver's seat of the automobile has been described as an object. For example, it may be a harness H connected to a reclining motor or lumbar support built into the seat back 110, a heater, or a sensor. A harness H connected to an electrical component may be used, and may also be a rear seat of a back-up vehicle, a seat for three people in some cases, a vehicle seat 10 for a train, a bus, etc., a vehicle seat for an airplane, a ship, etc. It may be used for

For example, in the present embodiment, the long groove 16 provided on the surface of the seat back pad 140 to which the harness H is assembled is described as extending continuously from one edge of the seat back pad 140 to the other edge. Without being limited to this, it may not extend from one edge to the other edge of the seat back pad 140, and a plurality of long grooves 16 are provided discontinuously and spaced apart from each other. 16 , a harness holding portion 18 may be provided, and there may be a portion where the harness H is assembled in the long groove 16 and a portion exposed to the surface of the seat back pad 140 .

For example, in the present embodiment, the harness H is pushed into the long groove 16 until it hits the groove bottom of the long groove 16. However, without being limited to this, in particular, when the projecting portion 24 sandwiches and supports the harness H. Therefore, as long as the harness H can be stably held in the long groove 16, it is not necessary to push the harness H into the long groove 16 until it hits the groove bottom of the long groove 16.

1 is an overall side view of a vehicle seat according to a first embodiment of the invention; FIG. It is a perspective view from the back of the same vehicle seat. FIG. 3 is a detailed partial view of part A in FIG. 2 ; FIG. 4 is a cross-sectional view taken along line BB in FIG. 3, and is a schematic partial view showing a state in which the harness H is attached to the long groove 16 of the first embodiment. 5 is another schematic partial view, similar to FIG. 4, showing how the harness H is assembled in the long groove 16 of the second embodiment. FIG. FIG. 4 is a schematic diagram of waste resin used when molding the pad of the present embodiment;

H Harness W Groove opening width D Harness diameter L Groove depth S Harness outer peripheral surface M Vibration motor 10 Vehicle seat 12 Seat back pad 14 Seat back pad surface 16 Long groove 18 Harness holding portion 20 Groove opening 22 Opposing Side 24 Overhang 26 Groove bottom 28 Rim 100 Seat cushion 110 Seat back 120 Seat cushion pad 130 Seat cushion skin 140 Seat back pad 150 Seat back skin 160 Reclining shaft 170 Side frame 180 Headrest 200 Waste resin 210 Molded part 220 Back surface

Claims (10)

A vehicle seat cushion body having a soft pad in which a harness is routed,
A long groove in which a harness is routed is formed on the surface of the soft pad,
A harness holding portion is formed in at least a part of the long groove,
The harness holding portion has a cross section that intersects the direction in which the long groove extends, the width of which narrows toward the surface of the soft pad, and the groove opening formed on the surface of the soft pad has a minimum width. , the groove is substantially U-shaped and tapered toward the groove opening, and the groove bottom of the long groove is shaped along a part of the outer circumference of the harness,
The portions of the harness holding portion that form opposing side surfaces of the long groove form a pair of protruding portions that approach the other opposing side surface toward the groove opening,
Each of the pair of overhanging portions is deformable in a direction that expands the groove opening so that the opposing side surfaces are substantially parallel to each other when the harness is inserted into the long groove through the groove opening. A vehicle seat cushion body characterized by: A vehicle seat cushion body having a soft pad in which a harness is routed,
A long groove in which a harness is routed is formed on the surface of the soft pad,
A harness holding portion is formed in at least a part of the long groove,
The harness holding portion has a cross section that intersects the direction in which the long groove extends, the width of which narrows toward the surface of the soft pad, and the groove opening formed on the surface of the soft pad has a minimum width. configured,
The portions of the harness holding portion that form opposing side surfaces of the long groove form a pair of protruding portions that approach the other opposing side surface toward the groove opening,
Each of the pair of protruding portions has a width of the groove opening and a maximum width of the long groove so that when the harness is pushed into the long groove through the groove opening, the harness can be pulled into the groove bottom of the long groove and deformed. A vehicle seat cushion body , wherein a difference is set so that the harness is sandwiched and supported by the pair of projecting portions within the long groove . The length of the long groove of the harness holding portion in the extending direction, the width of the groove opening, and/or the depth of the long groove are set according to the diameter of the harness. Item 3. The vehicle seat cushion body according to item 2. 4. The vehicle seat cushion body according to claim 3, wherein the groove depth is not more than twice the diameter of the harness. 3. The vehicle according to claim 2, wherein the cross-sectional shape of the long groove is determined according to the frictional force generated between the surface of the soft pad and the outer peripheral surface of the harness when the harness is pushed into the long groove. seat cushion body. 3. The vehicle seat according to claim 2, wherein the cross-sectional shape is a substantially U shape that tapers toward the groove opening, and the groove bottom of the long groove is shaped along a part of the outer circumference of the harness. cushion body. 2. The vehicle according to claim 1, wherein the long groove extends continuously from edge to edge of the soft pad, and a plurality of the harness holding portions are provided at predetermined intervals in the extending direction of the long groove. seat cushion body. 8. The vehicle seat cushion body according to claim 7, wherein the harness holding portions are alternately provided at both edges of the long groove in the extending direction of the long groove. 9. The vehicle seat cushion body according to claim 8, wherein said harness holding portions are provided facing each other at both edges of said long groove. A vehicle seat having a seat cushion and a seat back having a lower end connected to a rear end of the seat cushion, wherein the seat cushion and/or the seat back are any one of claims 1 to 9. 10. A vehicle seat, which is the vehicle seat cushion body according to claim 1.

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