JP2015020597A - Vehicle seat structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat structure including a pair of right and left side frames, capable of preventing a passenger from feeling of a foreign body or feeling bottomed while stretching a net material serving as a cushion material in a seat width direction so as to attain a necessary seat surface reaction force distribution.SOLUTION: A vehicle seat structure comprises: a seat cushion (2); and a seat back (4). The seat cushion (2) includes: a pair of right and left tabular side frames (14); a net (40) stretched in a seat width direction between the paired side frames (14); and a belt (46) stretched in a front-to-rear direction on a lower surface of a central portion of the net (40) in a seat width direction, and receiving a part of a seating load acting on this central portion of the net (40) in the seat width direction.

Description

  The present invention relates to a vehicle seat structure, and more particularly to a vehicle seat structure having a pair of left and right side frames.

  The seat cushion of a vehicle seat is required to have vibration absorption performance and shock absorption performance in order to maintain the posture and comfort of the occupant. In order to meet these requirements, springs and urethane pads have been used as cushioning materials for seat cushions, but in recent years, for the purpose of reducing vehicle seat weight, improving vibration absorption characteristics and shock absorption characteristics, It has been proposed to use a net material as a cushioning material.

  For example, Patent Document 1 discloses a seat structure in which a base net is stretched on a seat cushion portion to give a predetermined cushion characteristic. The seat cushion portion in the seat structure of Patent Document 1 includes a pair of left and right side frames, a front frame provided between the front portions of the pair of left and right side frames, and a rear portion of the pair of side frames. A rear base frame is provided, and a cushion base net is stretched in the front-rear direction between the front frame and the rear frame.

JP 2011-224049 A

Here, as disclosed in Patent Document 1, a pair of left and right side frames of a conventional vehicle seat is formed of a plate material, and is erected vertically with respect to the floor of the passenger compartment. In other words, these pair of left and right side frames have low rigidity against the force in the seat width direction, so it is not possible to support the occupant's weight by stretching the net material between these side frames in the seat width direction. Have difficulty.
Therefore, in the seat structure of Patent Document 1, a front frame and a rear frame are provided between a pair of left and right side frames, and a cushion base net is disposed between the front frame and the rear frame in the front-rear direction. It is stretched.

  However, when the net material as the cushion material is stretched in the longitudinal direction of the vehicle as in Patent Document 1, the left and right ends of the net material are not structurally supported, so the tension of the net material in the seat width direction is increased. There is a problem in that it cannot be maintained sufficiently and a distribution of a required seating surface reaction force cannot be obtained.

  Therefore, in a vehicle seat having a pair of left and right side frames, a net support structure for extending a net is disposed between the left and right side frames, and the net is extended in the seat width direction by the net support structure. The present inventors have studied such a sheet structure. However, in the seat structure in which the net is stretched in the seat width direction in this way, when the occupant sits on the seat, body pressure (added from the net material to the occupant's body at the position of the sciatic nodules on the right and left of the occupant's buttocks (Pressure) is locally increased, and there is a problem that the occupant feels a foreign object feeling or a bottom sensation.

  The present invention has been made to solve the above-described problems of the prior art, and in a seat structure of a vehicle seat having a pair of left and right side frames, a necessary seating surface reaction force distribution can be obtained. An object of the present invention is to provide a vehicle seat structure that can prevent a passenger from feeling a foreign object feeling or a bottom butt feeling while stretching a net material as a cushion material in the seat width direction.

In order to achieve the above object, a vehicle seat structure of the present invention is a vehicle seat structure including a seat cushion and a seat back, and the seat cushion includes a pair of left and right plate-like side frames, and a pair of Between the side frames, a net stretched in the seat width direction and a seating load that is stretched in the front-rear direction on the lower surface side of the center portion of the net in the seat width direction and acts on the center portion of the net in the seat width direction. And a belt for receiving the portion.
In the present invention configured as described above, the seat cushion includes a pair of left and right plate-like side frames, a net stretched between the pair of side frames in the seat width direction, and a center of the net in the seat width direction. Since the belt stretched in the front-rear direction is provided on the lower surface side of the portion, the seat load acting on the net is supported by the both ends and the center of the net in the seat width direction, and thereby the end of the net in the seat width direction The periphery of the sciatic nodule of the occupant positioned between the center portion and the center portion can be supported by the surface of the net. Thereby, it can prevent that a passenger | crew feels a foreign material feeling or a bottom sensation.

In the present invention, the width of the belt in the seat width direction is preferably smaller than the distance between the left and right sciatic nodules of the human body.
In the present invention configured as described above, since the width of the belt in the seat width direction is narrower than the distance between the left and right sciatic nodules of the human body, both ends of the belt are positioned inside the left and right sciatic nodules of the occupant. Thus, it is possible to prevent the passenger from feeling a foreign object or a bottom sensation.

In the present invention, preferably, the width of the belt in the sheet width direction is not less than 50 mm and not more than 110 mm.
In the present invention configured as described above, the width of the belt in the seat width direction is not less than 50 mm and not more than 110 mm. Therefore, for most of the occupants having various physiques, both ends of the belt are connected to the left and right sciatic nodules of the occupant. In addition, the periphery of the sciatic nodule of the occupant can be supported by the surface of the net while being positioned on the inner side, so that it is possible to reliably prevent the occupant from feeling a foreign body feeling or a bottom sensation.

In the present invention, preferably, a U-shaped pipe frame that is disposed between and supported by the pair of side frames and that opens rearward in plan view, and rear portions of the pair of left and right side frames. And a rear stabilizer pipe for connecting the belt in the seat width direction, and the net is stretched in the seat width direction between a pair of left and right net support portions extending in the front-rear direction in the pipe frame, and the front end of the belt is the pipe frame The rear end of the belt is locked to the rear stabilizer pipe.
In the present invention configured as described above, the front end of the belt is locked to the front portion extending in the seat width direction in the U-shaped pipe frame disposed between the side frames, and the rear end of the belt is Because the rear stabilizer pipe that connects the rear part of the side frame in the seat width direction is locked, a belt is stretched between the front part of the pipe frame and the rear stabilizer pipe having high rigidity against the force in the front-rear direction. Accordingly, a part of the seating load acting on the net can be reliably supported at the center portion in the seat width direction of the net. Therefore, the periphery of the sciatic nodule of the occupant positioned between the end portion in the seat width direction of the net and the central portion can be reliably supported by the surface of the net.

Further, in the present invention, preferably, it has a pad material placed on the upper side of the pipe frame in front of the net, and the front end of the upper surface of the net and the rear end of the upper surface of the pad material are substantially the same height. The belt is stretched so as to pass through the lower surface side of the center part in the sheet width direction of the net and the upper surface side of the pad material.
In the present invention configured as described above, the front end of the upper surface of the net and the rear end of the upper surface of the pad material placed in front of the net are positioned at substantially the same height, and the belt is the net seat. Since the belt is stretched so as to pass through the lower surface side of the central portion in the width direction and the upper surface side of the pad material, the belt is formed by the upper surface of the pad material at the same height as the front end of the upper surface of the net in front of the net. Thus, while maintaining continuity between the upper surface of the net and the upper surface of the pad material, the seat load acting on the net is supported by the both ends and the center of the net in the sheet width direction. Can do. Thereby, it can prevent more reliably that a passenger | crew feels a foreign material feeling or a bottom sensation.

  According to the present invention, in a seat structure of a vehicle seat having a pair of left and right side frames, a net material as a cushioning material is stretched in the seat width direction so as to obtain a required seating surface reaction force distribution. It is possible to prevent the occupant from feeling a foreign body feeling or a bottom-up feeling.

It is the perspective view which looked at the external appearance structure of the vehicle seat structure by embodiment of this invention from diagonally right front and upper direction. It is the perspective view which looked at the vehicle seat structure by embodiment of this invention from diagonally left front and upper direction. It is the elements on larger scale which looked at the peripheral structure of the pipe frame of the seat structure for vehicles by the embodiment of the present invention from the slanting left front and the upper part. It is the perspective sectional view which looked at the cushion material of the vehicular seat structure by the embodiment of the present invention from diagonally upper left. FIG. 5 is a perspective sectional view of the cushion material shown in FIG. 4 with a pleat pad removed. FIG. 3 is a partially enlarged perspective view of a peripheral structure of a pipe frame on which a net and a belt are stretched according to an embodiment of the present invention when viewed obliquely from the front left and from above. It is a schematic rear view which shows the position of the sciatic nodule of a human body. FIG. 8A is a schematic cross-sectional view showing a state in which a passenger's buttocks is supported by a net stretched in the seat width direction of a vehicle seat, and FIG. 8A has a net stretched in the seat width direction and a belt; FIG. 8B shows the case of the vehicle seat structure according to the embodiment of the present invention. It is a diagram which shows the distribution of the body pressure of the seat surface along the seat width direction in the front-back position in the vicinity of the sciatic nodule.

Hereinafter, a vehicle seat structure according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, an overall configuration of a vehicle seat structure according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of an external configuration of a vehicle seat structure according to an embodiment of the present invention as viewed obliquely right front and from above, and FIG. 2 illustrates a vehicle seat structure according to an embodiment of the present invention obliquely left front and It is the perspective view seen from the upper part.

First, as shown in FIG. 1, reference numeral 1 denotes a vehicle seat according to an embodiment of the present invention, and the vehicle seat 1 includes a seat cushion 2 and a seat back 4. In the present embodiment, the seat 1 is provided in the vehicle front-rear direction so that the seat width direction coincides with the vehicle width direction.
Further, on the right side of the seat, there are a tilt lever 6 for swinging the seat cushion 2 up and down and a reclining lever for reclining the seat back 4 by a reclining mechanism, which are manually operated by the occupants. Is provided.

  Next, as shown in FIGS. 1 and 2, a slide mechanism that extends in the vehicle front-rear direction and supports the seat cushion 2 slidably in the seat front-rear direction (vehicle front-rear direction) on the vehicle body floors on the left and right sides of the seat. 8 are provided. These slide mechanisms 8 are mainly composed of guide rails 10 fixed to the floor and sliders 12 that are slidably engaged with these guide rails 10.

Next, as shown in FIGS. 1 and 2, the seat cushion 2 is disposed between a pair of left and right plate-like side frames 14 fixed to the slider 12 of the slide mechanism 8 and the pair of side frames 14. A U-shaped pipe frame 16 that is supported by these side frames 14 and opens rearward in plan view, a front stabilizer pipe 18 that connects the front portions of the left and right side frames 14 in the seat width direction, The rear stabilizer pipe 20 connects the rear portion of the side frame 14 in the seat width direction. And the cushion material 22 mentioned later is provided so that the side frame 14 and the pipe frame 16 may be covered from upper direction.
The seat back 4 has a seat back frame 24 for supporting the seat back 4 itself. Lower end portions on both the left and right sides of the seat back frame 24 are respectively connected to upper rear sides of the left and right side frames 14 of the seat cushion 2 via a reclining mechanism. With this reclining mechanism, the seat back 4 The seat back frame 24 can swing back and forth about the lower end portion of the seat back frame 24 as an axis. A seat back pad material 26 is provided so as to cover the seat back frame 24.

Next, the structure of the seat cushion 2 will be described in detail with reference to FIG.
FIG. 3 is a partially enlarged perspective view of the peripheral structure of the pipe frame 16 of the vehicle seat structure according to the embodiment of the present invention as seen obliquely from the left front side and from above.

As shown in FIG. 3, in the U-shaped pipe frame 16 opened rearward in a plan view, a portion extending in the front-rear direction (hereinafter referred to as “net support portion 16a”) is engaged with the left and right ends of the net described later. A locking member 28 for stopping is provided. The locking member 28 extends in the front-rear direction along the left and right net support portions 16a, and has a base portion 28a fixed to the lower surface of the net support portion 16a, and a side surface of the pipe frame 16 from the base portion 28a at regular intervals. And a hook 28b formed so as to extend inward and upward of the seat cushion 2. A gap is provided between the hook 28b and the side surface of the pipe frame 16, so that the left and right ends of the net can be locked between the hook 28b and the side surface of the pipe frame 16.
In addition, a cushion support 30 that is formed of a solid round bar and supports a cushion material 22 described later from below is provided at the front portion of the pipe frame 16.
Further, a plate locking plate 32 for locking the front end of the cushion material 22 described later is provided at the center of the front end of the pipe frame 16 in the seat width direction, and is a solid round bar for locking the rear end of the cushion material 22. The locking wire 34 is provided at the center in the seat width direction on the rear surface side of the rear stabilizer pipe 20.

  Also, as shown in FIG. 3, the rear end of the pipe frame 16 extends to the vicinity of the connection position between the side frame 14 and the rear stabilizer pipe 20 below the upper sides of the left and right side frames 14. A connection bracket 36 is welded to the rear end of the pipe frame 16, and the connection bracket 36 is welded to the end of the rear stabilizer pipe 20. Thereby, the rear end of the pipe frame 16 is fixed to the rear stabilizer pipe 20 via the connection bracket 36.

The rear rib pipe 20 is connected to the rear portions of the left and right side frames 14 by bolts at both ends, and is rotatable with respect to these side frames 14 around the bolts.
That is, the entire pipe frame 16 is pivotally supported on the side frame 14 via the rear stabilizer pipe 20 and can swing up and down about the rear stabilizer pipe 20.

  Further, the front stabilizer pipe 18 is connected to the front portion of the side frame 14 by a bolt at an end thereof, and is rotatable with respect to the side frame 14 around the bolt.

Further, the right side frame 14 is provided with a known drive unit including a gear, a ratchet, and the like for rotating the front stabilizer pipe 18. This drive unit is connected to the tilt lever 6 and rotates the front stabilizer pipe 18 by the occupant's lever operation.
A link mechanism 38 that connects the end portion of the front stabilizer pipe 18 and the front portion of the pipe frame 16 is provided at the left and right front portions of the seat cushion 2.

  When the occupant operates the tilt lever 6, the drive unit rotates the front stabilizer pipe 18, and the pipe frame 16 swings up and down via a link mechanism 38 connected to the front stabilizer pipe 18. ing.

Next, the structure of the cushion material 22 of the vehicle seat structure according to the embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a perspective cross-sectional view of the vehicle seat structure cushion material 22 according to the embodiment of the present invention as viewed obliquely from the left front and from above, and FIG. 5 excludes the pleat pad from the cushion material 22 shown in FIG. FIG.

  First, as shown in FIGS. 4 and 5, the cushion material 22 is provided on the net 40 and the net 40 that is stretched between the net support portions 16 a of the pipe frame 16 in the seat width direction. A U-shaped pad material 42 opened rearward in a plan view, a pleat pad 44 provided on the front portion of the pad material 42 and the upper surface of the net 40, and a lower surface side of the center portion in the sheet width direction of the net in the front-rear direction. And a belt 46 to be stretched. The net 40, the pad material 42, and the pleat pad 44 are sewn together at the positions of the left and right end portions of the net 40, and the net and the belt 46 are sewn together at the positions of the front and rear end portions of the net.

  Next, as shown in FIG. 5, the pad material 42 includes a front support 42a extending in the seat width direction at the front portion of the pad material 42, and side supports 42b extending rearward from both ends of the front support 42a. The front support 42a and the side support 42b are integrally formed. The front support 42 a of the pad material 42 is placed on the cushion support 30 provided at the front portion of the pipe frame 16, and the side support 42 b of the pad material 42 is placed on the upper side portion of the side frame 14. The pad material 42 is made of urethane foam.

  Next, as shown in FIG. 4, the pleat pad 44 is provided between the side supports 42 b of the pad material 42 and covers the front support 42 a, the net 40, and the belt 46 of the pad material 42. The pleated pad 44 is made of urethane foam, and a skin 44a is sewn on the surface thereof.

  Next, as shown in FIG. 5, the net 40 is provided on the lower surface side of the side support 42 b behind the front support 42 a of the pad material 42. The front end of the upper surface of the net 40 and the rear end of the upper surface of the front support 42a of the pad material 42 are located at substantially the same height.

  Further, as shown in FIG. 5, the belt 46 is stretched in the front-rear direction so as to pass through the lower surface side of the center portion of the net 40 in the sheet width direction and the upper surface side of the front support 42 a of the pad material 42. Yes. Locking hooks 46a and 46b are provided at the front end and the rear end of the belt 46, and the locking hook 46a at the front end of the belt 46 is a locking plate provided at the front portion of the pipe frame 16 extending in the seat width direction. 32, and the hook 46 b at the rear end of the belt 46 is locked to a locking wire 34 provided on the rear stabilizer pipe 20, whereby the belt 46 extends from the front end to the rear end of the seat cushion 2. The net 40 is stretched in the front-rear direction on the lower surface side of the central portion in the sheet width direction.

Next, referring to FIG. 6, a mounting structure for the net 40 of the vehicle seat structure according to the embodiment of the present invention will be described.
FIG. 6 is a partially enlarged perspective view of the peripheral structure of the pipe frame 16 on which the net 40 and the belt 46 are stretched according to the embodiment of the present invention as viewed obliquely from the upper left. As described above, the cushion material 22 is attached on the side frame 14 and the pipe frame 16 in a state where the net 40, the pad material 42, the pleat pad 44, and the belt 46 are sewn together and integrated. 6 illustrates a state in which the pad material 42 and the pleat pad 44 are omitted in order to explain the attachment structure of the net 40 and the belt 46 to the pipe frame 16.

  As shown in FIG. 6, a plurality of slits 40 a are formed at the left and right ends of the net 40 at the same interval as the hooks 28 b of the locking member 28 fixed to the net support portion 16 a of the pipe frame 16. By inserting the hooks 28b of the locking member 28 into the respective slits 40a, the left and right ends of the net 40 are locked to the locking member 28, and the net in the sheet width direction is interposed between the left and right net support portions 16a. 40 is stretched. The net 40 is formed of a stretchable fabric such as Hanex (registered trademark).

  In addition, as described above, the hook 46 a at the front end of the belt 46 is locked to the locking plate 32 provided at the front portion of the pipe frame 16, and the hook 46 at the rear end of the belt 46. 46 b is stretched in the front-rear direction on the lower surface side of the center portion in the seat width direction of the net 40 by being latched by the latch wire 34 provided in the rear stabilizer pipe 20. The belt 46 is formed of, for example, an elastic fabric similar to the net 40.

  Next, a method for determining the width of the belt 46 of the vehicle seat structure according to the embodiment of the present invention will be described with reference to FIG. FIG. 7 is a schematic rear view showing the position of the sciatic nodule of the human body.

As shown in FIG. 7, the sciatic nodule 48 is located at the lower end of the pair of left and right sciatica. If the distance between the left and right sciatic nodules 48 is W, W = 143 mm for the American adult male 95% tile (AM95) and W = 115 mm for the US adult female 5% tile (AF05).
If the belt 46 is positioned directly under the seated sciatic tuber 48 of the seated occupant, the body pressure of the portion of the sciatic tuber 48 increases due to the reaction force of the belt 46, and there is a possibility that the occupant may feel a foreign body feeling or a bottom butt. is there. Therefore, the width of the belt 46 in the seat width direction is preferably narrower than the distance W between the sciatic nodules 48.
Thus, in the vehicle seat structure according to the present embodiment, the width of the belt 46 in the seat width direction is narrower than the distance between the sciatic nodules 48 of the AF 05, specifically 110 mm or less.

In addition, if the width of the belt 46 in the seat width direction is too narrow, when the occupant is seated, the protruding shape at the center portion in the seat width direction of the net 40 with the belt 46 stretched on the lower surface becomes steep, and the occupant feels uncomfortable. May feel. Accordingly, it is preferable that the width of the belt 46 in the sheet width direction is not narrowed more than necessary.
Therefore, when the present inventors measured the body pressure distribution of the seating surface at the time of sitting of the American adult female 5% tile (AF05), the body pressure is sufficiently low in the range of the width of 50 mm between the right and left hips. It has been found that even if the width of the belt 46 in the seat width direction is less than 50 mm, the effect is small in reducing the occupant's feeling of foreign matter and bottom sensation. Therefore, in the vehicle seat structure according to the present embodiment, the width of the belt 46 in the seat width direction is 50 mm or more.

As described above, in the vehicle seat structure according to the present embodiment, the width of the belt 46 in the seat width direction is not less than 50 mm and not more than 110 mm.
Furthermore, when the present inventors measured the body pressure distribution of the seating surface at the time of seating from the American adult male 25% tile (AM25) to the American adult male 80% tile (AM80), the width between the right and left buttocks is 70 mm. It was found that the body pressure was sufficiently low in this range. Therefore, the width of the belt 46 in the sheet width direction is particularly preferably 70 mm.

Next, referring to FIG. 8 and FIG. 9, the body pressure distribution of the vehicle seat structure according to the embodiment of the present invention, and the vehicle seat structure including the net 40 stretched in the seat width direction and not including the belt 46. Compare with body pressure distribution.
FIG. 8 is a schematic cross-sectional view showing a state in which the occupant's buttocks are supported by the net 40. FIG. 8 (a) shows a vehicle seat having the net 40 stretched in the seat width direction and having no belt 46. FIG. 8B shows the case of the vehicle seat structure according to the embodiment of the present invention.
FIG. 9 is a diagram showing the distribution of the body pressure of the seating surface along the seat width direction at the front and rear positions in the vicinity of the sciatic tuberosity 48, and the horizontal axis shows the distance from the left end in the seat width direction. The axis | shaft has shown the ratio (load ratio) of the load in each position with respect to the total load to a seat surface. In FIG. 9, the solid line indicates the body pressure distribution of the vehicle seat structure according to the embodiment of the present invention, and the broken line indicates the vehicle seat structure that has the net 40 stretched in the seat width direction and does not have the belt 46. It shows body pressure distribution.

  As shown in FIG. 8A, in the vehicle seat structure having the net 40 stretched in the seat width direction and not having the belt 46, the net 40 acts on the net 40 only by the both ends in the seat width direction. The seating load to be supported is supported. Therefore, as shown by a broken line in FIG. 9, the body pressure is locally high at the position of the sciatic nodule 48 of the occupant. As a result, the occupant feels a foreign object feeling and a bottom-up feeling.

  On the other hand, as shown in FIG. 8B, in the vehicle seat structure according to the embodiment of the present invention, the net 40 includes both the net width direction both ends of the net 40 and the sheet width direction central portion where the belt 46 is stretched. The seating load acting on 40 is supported, whereby the periphery of the sciatic nodule 48 of the occupant located between the seat width direction end portion and the center portion of the net 40 is supported by the surface of the net. Therefore, as shown by a solid line in FIG. 9, the body pressure around the sciatic nodule 48 is relatively low as compared with the case without the belt 46. Thereby, it is prevented that a passenger | crew feels a foreign material feeling and a bottom sensation.

  Next, the effect of the vehicle seat structure according to the above-described embodiment of the present invention will be described.

  First, in the present embodiment, the seat cushion 2 includes a pair of left and right plate-shaped side frames 14, a net 40 stretched between the pair of side frames 14 in the seat width direction, and a seat width of the net 40. Since the belt 46 stretched in the front-rear direction is provided on the lower surface side of the central portion in the direction, the seating load acting on the net 40 is supported by the both ends and the central portion of the net 40 in the seat width direction. The periphery of the sciatic nodule 48 of the occupant positioned between the seat width direction end portion and the center portion of the occupant can be supported by the surface of the net 40. Thereby, it can prevent that a passenger | crew feels a foreign material feeling or a bottom sensation.

  Further, since the width of the belt 46 in the seat width direction is narrower than the distance between the left and right sciatic nodules 48 of the human body, both ends of the belt 46 can be positioned inside the left and right sciatic nodules 48 of the occupant. Thus, it is possible to prevent the occupant from feeling a foreign object feeling or a bottom-up feeling.

  In particular, since the width of the belt 46 in the seat width direction is 50 mm or more and 110 mm or less, for most of the occupants having various physiques, both ends of the belt 46 are positioned inside the sciatic nodules 48 on the left and right of the occupant. The periphery of the sciatic tuberosity 48 of the occupant can be supported by the surface of the net 40, and this can surely prevent the occupant from feeling a foreign object or a bottom sensation.

  The front end of the belt 46 is locked to a front portion extending in the seat width direction in the U-shaped pipe frame 16 disposed between the side frames 14, and the rear end of the belt 46 is connected to the left and right side frames 14. Since the rear portion is locked to the rear stabilizer pipe 20 that connects the seat width direction, the belt 46 is stretched between the front portion of the pipe frame 16 and the rear stabilizer pipe 20 having high rigidity against the force in the front-rear direction. Accordingly, a part of the seating load acting on the net 40 can be reliably supported at the center portion of the net 40 in the seat width direction. Therefore, the periphery of the sciatic nodule 48 of the occupant positioned between the seat width direction end portion and the center portion of the net 40 can be reliably supported by the surface of the net 40.

  In particular, the front end of the upper surface of the net 40 and the rear end of the upper surface of the pad material 42 placed in front of the net 40 are located at substantially the same height, and the belt 46 is the central portion of the net 40 in the sheet width direction. Since the belt is stretched so as to pass through the lower surface side of the pad material 42 and the upper surface side of the pad material 42, the belt is formed in front of the net 40 by the upper surface of the pad material 42 at the same height as the front end of the upper surface of the net 40. 46, thereby maintaining the continuity between the upper surface of the net 40 and the upper surface of the pad material 42, and the seating acting on the net 40 by the both ends and the central portion of the net 40 in the seat width direction. The load can be supported. Thereby, it can prevent more reliably that a passenger | crew feels a foreign material feeling or a bottom sensation.

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat cushion 4 Seat back 6 Tilt lever 8 Slide mechanism 10 Guide rail 12 Slider 14 Side frame 16 Pipe frame 16a Net support part 18 Front stabilizer pipe 20 Rear stabilizer pipe 22 Cushion material 24 Seat back frame 26 Seat back pad material 28 Locking member 28a Base portion 28b Hook 30 Cushion support 32 Locking plate 34 Locking wire 36 Connection bracket 38 Link mechanism 40 Net 40a Slit 42 Pad material 42a Front support 42b Side support 44 Pleated pad 44a Skin 46 Belt 46a, 46b Locking Hook 48 sciatic tuberosity

Claims (5)

A vehicle seat structure including a seat cushion and a seat back,
The above seat cushion
A pair of left and right plate-shaped side frames;
Between the pair of side frames, a net stretched in the seat width direction;
A vehicle seat structure comprising: a belt stretched in the front-rear direction on a lower surface side of a center portion in the seat width direction of the net.   The vehicle seat structure according to claim 1, wherein a width of the belt in a seat width direction is narrower than a distance between left and right sciatic nodules of the human body.   The vehicle seat structure according to claim 2, wherein a width of the belt in a seat width direction is not less than 50 mm and not more than 110 mm. A U-shaped pipe frame which is disposed between the pair of side frames and supported by these side frames and which opens rearward in plan view;
A rear stabilizer pipe that connects the rear portions of the pair of left and right side frames in the seat width direction, and
The net is stretched in the seat width direction between a pair of left and right net support portions extending in the front-rear direction in the pipe frame,
The front end of the belt is locked to a front portion extending in the seat width direction in the pipe frame, and the rear end of the belt is locked to the rear stabilizer pipe. The vehicle seat structure as described. Having a pad material placed on the front upper side of the pipe frame in front of the net;
The front end of the upper surface of the net and the rear end of the upper surface of the pad material are located at substantially the same height,
The vehicle seat structure according to claim 4, wherein the belt is stretched so as to pass through a lower surface side of a center portion in the seat width direction of the net and an upper surface side of the pad material.

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