JP2015024785A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat equipped with an occupant detection sensor which can inhibit erroneous detection caused by a hand baggage and further improve sitting comfort.SOLUTION: A vehicle seat 1 comprises a backrest part 12, a seat part 11 and an occupant detection sensor 41. The seat part 11 has a front area 11a, a rear area 11b, and a draw-in portion 31 which lies between the front area 11a and the rear area 11b and in which a skin 22 is drawn. The occupant detection sensor 41 avoids a place underneath the draw-in portion 31 in the seat part 11 and is situated closer to the draw-in portion 31 than the backrest part 12, and plural detection portions 42a, 42b, 42c are linearly arranged in the vehicle width direction Y.

Description

  The present invention relates to a vehicle seat provided with an occupant detection sensor.

  Some vehicle seats include an occupant detection sensor that detects the seating of the occupant. The occupant detection sensor is provided, for example, in a seat portion, and constitutes a part of a safety device that functions when it is not confirmed that the occupant is wearing the seat belt.

  The seating sensor described in Patent Document 1 has three sensor cells arranged in a straight line. The seating sensor is provided at the rear part of the seat part adjacent to the backrest part and is disposed obliquely with respect to the vehicle traveling direction.

  The seating detection means described in Patent Document 2 is formed in a planar shape and is provided in the seat portion. This seating detection means has a relatively large area.

Japanese Patent No. 4434259 Japanese Patent No. 2548485

  In order to detect a passenger | crew reliably, it is necessary to mount a sensor with high sensitivity. However, in this case, for example, even when a light baggage is placed on the passenger seat, the above-mentioned sensor may react, and a safety device that notifies that the seat belt is not worn may function. Since this is an annoying condition for the occupant, there is room for improvement in convenience.

  In addition, when an occupant detection sensor is provided in the seat portion of the seat, a feeling of strangeness may occur in the seating comfort in the vicinity of this sensor.

  Therefore, the present invention provides a vehicle seat provided with an occupant detection sensor capable of suppressing erroneous detection due to baggage and further improving sitting comfort.

  A vehicle seat according to an embodiment of the present invention includes a backrest portion, a seat portion, and an occupant detection sensor. The seat includes a front region, a rear region, and a lead-in portion that is located between the front region and the rear region and into which the skin is drawn toward the inside of the seat. The portion of the skin that is drawn toward the inside of the seat by the drawing portion may be a portion with a seam of the skin or a portion without a seam. The occupant detection sensor avoids the lower portion of the retracting portion at the seat portion and is positioned closer to the retracting portion than the backrest portion, and a plurality of detecting portions are arranged linearly in the vehicle width direction.

  At this time, the occupant detection sensor may be disposed in the vicinity of the retracting portion. The occupant detection sensor may be disposed along at least a part of the pull-in portion. The occupant detection sensor may be disposed on the rear side of the retracting portion. The said occupant detection sensor may be arrange | positioned in the position shifted | deviated to the vehicle center side with respect to the center of the vehicle width direction of the said seat part.

  The vehicle detection sensor for a vehicle seat according to one embodiment of the present invention avoids the lower part of the retracting part and lowers the retracting part than the backrest part in the seat part provided with the retracting part between the front region and the rear region. A plurality of detectors are arranged in a straight line in the vehicle width direction. For this reason, a relatively wide space can be secured between the occupant detection sensor and the backrest portion in the seat, and even when a load is placed on the seat, the occupant detection sensor does not recognize the load, and the occupant detection sensor False detection is suppressed. As a result, it is possible to secure passenger detection performance and improve passenger convenience. In addition, the above-mentioned position where the occupant detection sensor is disposed is a place that is far from the position where the occupant is most depressed when the occupant is seated. be able to.

  According to the vehicle seat in which an occupant detection sensor is disposed in the vicinity of the pull-in portion, the occupant is more difficult to feel the presence of the occupant detection sensor due to the influence of the pull-in portion. For this reason, the uncomfortable feeling at the time of sitting can further be reduced.

  According to the vehicle seat in which the occupant detection sensor is arranged along at least a part of the retracting portion, the presence of the occupant detection sensor is easily confused by the influence of the retracting portion, and the presence of the occupant detection sensor is more difficult to be felt by the occupant. The uncomfortable feeling when seated can be further reduced.

  According to the vehicle seat in which the occupant detection sensor is disposed behind the retracting portion, the occupant detection sensor is disposed on the side close to the butt portion of the occupant, and it can be expected that the detectability is further improved.

  According to the vehicle seat in which the occupant detection sensor is arranged at a position shifted toward the vehicle center side with respect to the center in the vehicle width direction of the seat, a large load applied to the seat when the occupant gets on and off hardly acts on the occupant detection sensor, It is expected to improve the durability and reliability of the occupant detection sensor.

The top view which shows the inside of the vehicle which concerns on one embodiment of this invention. The top view of the vehicle seat shown in FIG. Sectional drawing which follows the F3-F3 line of the vehicle seat shown in FIG. Sectional drawing which follows the F4-F4 line | wire of the vehicle seat shown in FIG. The side view which shows the state at the time of passenger | crew seating of the vehicle seat shown in FIG.

  A vehicle seat 1 (hereinafter referred to as seat 1) according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an example of a vehicle 2 (for example, an automobile) provided with a seat 1 of the present embodiment. The vehicle 2 includes a vehicle main body 3 including a passenger compartment R. For example, a plurality of seats 1 are attached to the vehicle body 3. As shown in FIG. 1, a direction orthogonal to the vehicle longitudinal direction X is defined as a vehicle width direction Y.

  FIG. 2 shows a plan view of the seat 1 for the passenger seat, for example. 3 and 4 show cross-sectional views of the sheet 1. As shown in FIGS. 2 to 4, the seat 1 includes a seat portion 11 (seat surface portion) on which an occupant sits, and a backrest portion 12 that stands up behind the seat portion 11. The seat portion 11 includes a front region 11a, a rear region 11b, a left end region 11c, and a right end region 11d as four regions that are largely divided when viewed from above.

  As shown in FIG. 2, the front region 11 a is located in a substantially half on the front side of the seat portion 11 and includes the front end portion of the seat portion 11. The rear region 11 b is located in a substantially half of the rear side of the seat portion 11 and includes a rear end portion of the seat portion 11 adjacent to the backrest portion 12. In other words, the rear region 11b is located between the front region 11a and the backrest 12.

  As shown in FIG. 3, the upper surface of the seat portion is inclined backward and downward. For this reason, the position of the upper surface of the front region 11a is higher than the upper surface of the rear region 11b. The front area 11a and the rear area 11b are inclined downward and backward.

  On the other hand, as shown in FIG. 2, the left end region 11c extends in the vehicle front-rear direction X on the left side of the front region 11a and the rear region 11b. The left end region 11c extends from the front end portion of the seat portion 11 to the rear end portion, for example. Similarly, the right end region 11d extends in the vehicle front-rear direction X on the right side of the front region 11a and the rear region 11b. The right end region 11d extends from the front end portion of the seat portion 11 to the rear end portion, for example. As shown in FIG. 4, the left end region 11c and the right end region 11d are raised upward with respect to the front region 11a and the rear region 11b. Thereby, the upper surface of the seat part 11 is formed in a bowl shape.

Next, the configuration of the seat portion 11 will be described in detail.
As shown in FIGS. 3 and 4, the seat portion 11 includes a pad 20 attached to the frame and first to fourth skins 21, 22, 23, and 24 attached to the surface of the pad 20.

  The pad 20 has a front portion 20a located in the front region 11a, a rear portion 20b located in the rear region 11b, a left end portion 20c located in the left end region 11c, and a right end portion 20d located in the right end region 11d. The pad 20 is made of urethane, for example, and has an outer shape corresponding to the shape of the seat portion 11. That is, the front portion 20a of the pad 20 is at a higher position than the rear portion 20b. The front part 20a and the rear part 20b are inclined downward and backward. The left end portion 20c and the right end portion 20d are raised upward with respect to the front portion 20a and the rear portion 20b.

  The first skin 21 is stretched over the front region 11 a of the seat portion 11 and covers the front portion 20 a of the pad 20. Similarly, the second skin 22 is stretched on the rear region 11 b of the seat portion 11 and covers the rear portion 20 b of the pad 20. The third skin 23 is stretched over the left end region 11 c of the seat portion 11 and covers the left end portion 20 c of the pad 20. The fourth skin 24 is stretched over the right end region 11 d of the seat portion 11 and covers the right end portion 20 d of the pad 20.

Next, the retracting portions 31 and 32 will be described in detail.
As shown in FIGS. 2 and 3, a lateral pull-in portion 31 (first pull-in portion) is provided between the front region 11 a and the rear region 11 b of the seat portion 11. At least a part of the lateral lead-in part 31 extends in the vehicle width direction Y and divides the front region 11a and the rear region 11b. The lateral lead-in part 31 may extend linearly or may include a part extending in a gentle curve.

  The lateral lead-in part 31 is a depression (groove part) provided on the surface of the seat part 11, and a part of each of the first skin 21 and the second skin 22 is drawn in. In the lateral lead-in part 31 in the present embodiment, for example, a joint part 34 (sewing part, seam) between the first skin 21 and the second skin 22 is drawn downward. More specifically, the pad 20 has a recess 20e at a position corresponding to the lower side of the lateral lead-in portion 31, that is, between the front portion 20a and the rear portion 20b. At least a part of the recess 20 e extends in the vehicle width direction Y so as to correspond to the lateral pull-in portion 31.

  The end portion of the first skin 21 and the end portion of the second skin 22 are coupled by a coupling portion 34. A locking member 36 (for example, a suspension member) is attached to the coupling portion 34. The locking member 36 pulls the connecting portion 34 of the first skin 21 and the second skin 22 downward and is attached to a fixing portion 37 provided on the pad 20, for example. As a result, the connecting portion 34 of the first skin 21 and the second skin 22 is drawn toward the recess 20e of the pad 20, and the surfaces of the first skin 21 and the second skin 22 are appropriately stretched, The connecting portion 34 between the first skin 21 and the second skin 22 becomes almost invisible from the outside.

  Similarly, a pair of vertical lead-in portions 32 (second lead-in portions) are provided between the front region 11a and the rear region 11b and the left end region 11c, and between the front region 11a and the rear region 11b and the right end region 11d. It has been. The vertical lead-in part 32 extends in the vehicle longitudinal direction X.

  The vertical lead-in part 32 is a recess (groove part) provided on the surface of the seat part 11 as in the case of the horizontal lead-in part 31, and a part of the first to fourth skins 21, 22, 23, 23 is drawn in. ing. In the left vertical lead-in part 32 in the present embodiment, for example, the first skin 21 and the joint part 34 (sewing part, seam) between the second skin 22 and the third skin 23 are drawn downward. In the right vertical pull-in part 32 in the present embodiment, for example, the first skin 21 and the joint part 34 (sewing part, seam) between the second skin 22 and the fourth skin 24 are drawn downward.

  In addition, since the other structure of the vertical drawing-in part 32 is substantially the same as the horizontal drawing-in part 31, the same code | symbol is attached | subjected to the structure which has the same function, and description is abbreviate | omitted. Although not shown in FIG. 4, the coupling portion 34 positioned in the vertical pull-in portion 32 is attached to the locking member 36 and the fixing portion 37 in the same manner as the coupling portion 34 positioned in the horizontal pull-in portion 31.

  In other words, the seat part 11 is provided with an H-shaped lead-in part composed of the horizontal lead-in part 31 and the vertical lead-in part 32. The horizontal lead-in part 31 extends between the pair of vertical lead-in parts 32.

  In the present embodiment, the example in which the seam (sewn portion) of the skin is the pull-in portion is shown, but the configuration of the pull-in portion is not limited to this. The pull-in portion is not limited to the seam (sewn portion), and the configuration thereof is not particularly limited as long as it is a so-called concave shape in which a part of the skin is drawn toward the inside of the seat portion.

Next, the occupant detection sensor 41 according to the present embodiment will be described.
As shown in FIG. 2, the occupant detection sensor 41 includes a plurality of detection units 42 a, 42 b, 42 c (sensor cells) and is provided in the seat portion 11. The occupant detection sensor 41 according to the present embodiment includes, for example, three detection units 42a, 42b, and 42c. Note that the number of detection units of the occupant detection sensor 41 is not limited to three, and may be two or four or more. The occupant detection sensor 41 is a linear type sensor in which the plurality of detection units 42a, 42b, and 42c are arranged in a straight line.

  Each detection part 42a, 42b, 42c operate | moves when a load is applied on the said detection part 42a, 42b, 42c. The occupant detection sensor 41 according to the present embodiment is configured to detect the occupant's seating when, for example, both of the two detection units 42a and 42b (or the detection units 42b and 42c) adjacent to each other detect a load at the same time (so-called 2 Cell ON structure). Instead of the above, the occupant detection sensor 41 may be configured to detect the occupant's seating (so-called single cell ON structure) when at least one of the detection units 42a, 42b, and 42c detects a load, for example.

  As shown in FIG. 2, the plurality of detection units 42 a, 42 b, 42 c of the occupant detection sensor 41 are arranged linearly in the vehicle width direction Y. The occupant detection sensor 41 avoids the lower side of the horizontal pull-in part 31 and is positioned closer to the horizontal pull-in part 31 than the backrest part 12. Thereby, a relatively wide space S (non-detection space) is secured between the occupant detection sensor 41 and the backrest portion 12.

  Specifically, the occupant detection sensor 41 is provided, for example, at a position about 60 to 80 mm away from the hip point HP (a reference point of the butt when the occupant is seated). In this case, since the occupant detection sensor 41 is positioned, for example, below the thigh of the occupant, it can detect that the occupant is seated by the load input.

  As shown in FIGS. 2 and 3, the occupant detection sensor 41 is disposed in the vicinity of the lateral pull-in portion 31. The occupant detection sensor 41 is disposed along at least a part of the lateral pull-in portion 31. The occupant detection sensor 41 is disposed on the rear side of the lateral pull-in portion 31. That is, the occupant detection sensor 41 is provided in the rear region 11 b of the seat portion 11 and is located between the lateral retracting portion 31 and the backrest portion 12.

  As shown in FIG. 3, the occupant detection sensor 41 is located between the rear portion 20 b of the pad 20 and the second skin 22. The occupant detection sensor 41 is attached to the pad 20 with double-sided tape, for example. The occupant detection sensor 41 is located at a lower height than, for example, the front region 11a of the seat portion 11 (the upper surface of the front portion 20a of the pad 20). The occupant detection sensor 41 is located at substantially the same height as the connecting portion 34 between the first skin 21 and the second skin 22, for example. A laminate material is provided between the occupant detection sensor 41 and the second skin 22.

  As shown in FIG. 2, the occupant detection sensor 41 is provided at a position shifted toward the vehicle center side with respect to the center of the seat portion 11 in the vehicle width direction Y. More specifically, as shown in FIG. 4, the pad 20 has a hole 44 at a substantially central portion in the vehicle width direction Y. The hole 44 penetrates the pad 20 in the vertical direction. A part of the occupant detection sensor 41 passes through the hole 44 and reaches the lower part of the pad 20. A connector 45 that is electrically connected to the control unit of the vehicle 2 is provided at the end of the occupant detection sensor 41 located below the pad 20.

  As shown in FIGS. 2 and 4, the occupant detection sensor 41 extends rightward from the hole 44 above the pad 20. For this reason, all the detection parts 42a, 42b, 42c of the occupant detection sensor 41 are located closer to the vehicle center side than the center of the seat part 11 in the vehicle width direction Y.

  As shown in FIG. 2, the occupant detection sensor 41 does not extend beyond the vertical retracting portion 32 in order to avoid the lower portion of the vertical retracting portion 32. That is, the occupant detection sensor 41 fits inside the area (the rear area 11b in this embodiment) divided by the horizontal pull-in part 31 and the vertical pull-in part 32. The detection part 42 a located at the end of the occupant detection sensor 41 is located in the vicinity of the corner C defined by the horizontal pull-in part 31 and the vertical pull-in part 32.

Next, the operation and effect of the sheet 1 according to the present embodiment will be described.
As shown in FIGS. 2 and 3, when the luggage P is placed on the seat portion 11 of the seat 1, the luggage P is usually placed in the vicinity of the backrest portion 12. This is because the seat portion 11 is inclined backward and downward, so that the vicinity of the backrest portion 12 is the most depressed position, and the load P is easily stabilized, and the load P is leaned against the backrest portion 12. This is because the luggage P is easy to stabilize.

  Therefore, in this embodiment, the occupant detection sensor 41 is disposed at a position that is deliberately separated from the backrest portion 12 and extends linearly in the vehicle width direction Y. For this reason, a relatively wide space S is secured between the occupant detection sensor 41 and the backrest 12. For this reason, even when the luggage P is placed on the seat 11, the occupant detection sensor 41 does not recognize the load, and erroneous detection of the occupant detection sensor 41 is suppressed. In other words, the occupant detection sensor 41 of the present embodiment is linearly arranged in the vehicle width direction Y so as to be removed from the place where the load of the luggage P is easily applied in the seat portion 11.

  Thereby, for example, even when a highly sensitive occupant detection sensor 41 is provided, the function of a safety device that notifies that, for example, the seat belt is not worn when the luggage P is placed is suppressed. . Therefore, it is possible to ensure passenger detection performance and improve passenger convenience.

  As shown in FIG. 5, when the occupant is seated, the vicinity of the backrest 12 in the seat 11 receives the most body pressure. On the other hand, the occupant detection sensor 41 according to the present embodiment is disposed closer to the lateral retracting portion 31 than the backrest portion 12. In other words, the occupant detection sensor 41 according to the present embodiment is disposed away from the most sinking place when the occupant is seated.

  For this reason, the uncomfortable feeling at the time of the seating resulting from the passenger | crew detection sensor 41 is reduced, and the further improvement of sitting comfort can be aimed at. Moreover, if the discomfort felt by the occupant can be reduced, the thickness of the laminate material between the occupant detection sensor 41 and the skin 22 can be reduced.

  Furthermore, in the present embodiment, the occupant detection sensor 41 is disposed in the vicinity of the lateral pull-in portion 31. The lateral pull-in portion 31 is a groove portion provided in the seat portion 11, and is different in the degree of sinking when the occupant is seated compared to other portions. For this reason, when the occupant detection sensor 41 is disposed near the lateral pull-in portion 31, it is difficult for the occupant to feel the presence of the occupant detection sensor 41 due to the influence of the lateral pull-in portion 31. For this reason, the uncomfortable feeling at the time of sitting can further be reduced.

  In the present embodiment, the occupant detection sensor 41 is disposed along at least a part of the lateral pull-in portion 31. According to such a configuration, it is difficult for the occupant to feel the presence of the occupant detection sensor 41 due to the influence of the lateral pull-in portion 31, and it is possible to further reduce the uncomfortable feeling when sitting.

  In the present embodiment, the occupant detection sensor 41 is disposed on the rear side of the lateral pull-in portion 31. According to such a configuration, the occupant detection sensor 41 is disposed on the side closer to the butt of the occupant, and it can be expected that the detectability is further improved.

  Generally, when a passenger gets on and off, a large load acts on an area closer to the door than the center in the seat portion 11. Therefore, in the present embodiment, the occupant detection sensor 41 is disposed at a position shifted toward the vehicle center side with respect to the center of the seat portion 11 in the vehicle width direction Y. According to such a configuration, a large load generated when the passenger gets on and off hardly acts on the occupant detection sensor 41, and an improvement in durability reliability of the occupant detection sensor 41 can be expected.

  As mentioned above, although the sheet | seat 1 which concerns on one embodiment of this invention was demonstrated, this invention is not limited to the said embodiment. The configuration and shape of each part can be implemented with appropriate modifications. For example, the occupant detection sensor 41 may be disposed in front of the lateral pull-in unit 31. The seat 1 provided with the occupant detection sensor 41 is not limited to the passenger seat, and may be a driver seat or a rear seat.

  Y ... Vehicle width direction, S ... Space, P ... Luggage, 1 ... Vehicle seat, 11 ... Seat, 11a ... Front region, 11b ... Rear region, 21, 22 ... Skin, 31 ... Lateral pull-in portion, 41 ... Passenger detection Sensors 42a, 42b, 42c... Detection unit.

Claims (5)

Backrest,
A seat portion having a front region, a rear region, and a retracting portion that is located between the front region and the rear region and into which the epidermis is retracted;
An occupant detection sensor in which a plurality of detection units are arranged in a straight line in the vehicle width direction while being positioned closer to the pull-in unit than the backrest unit while avoiding the lower part of the pull-in unit in the seat portion;
A vehicle seat comprising: The vehicle seat according to claim 1, wherein the occupant detection sensor is disposed in the vicinity of the pull-in portion. 3. The vehicle seat according to claim 1, wherein the occupant detection sensor is disposed along at least a part of the retracting portion. The vehicle occupant according to any one of claims 1 to 3, wherein the occupant detection sensor is disposed on a rear side of the retracting portion. The vehicle seat according to any one of claims 1 to 4, wherein the occupant detection sensor is disposed at a position shifted toward a vehicle center side with respect to a center of the seat portion in a vehicle width direction.

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