JP2007055490A - Seat with seating sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat with a seating sensor which can detect the passenger's various weight, large and small, by simple constitution. <P>SOLUTION: An upwardly oriented recess 2 is provided to the undersurface of the bottom face of the under-hip of a pad 1, and a soft element 3 is fitted in the recess 2. Then a first protrusion 3a of relatively small height and a second protrusion 3b of relatively large height are provided on the top surface of the soft element 3. A first seating sensor 4 is provided on the top surface of the first protrusion 3a, and the second seating sensor 5 is provided on the top surface of the second protrusion 3b. The threshold values of the sensors 4, 5 are the same. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seat provided with a seating sensor for detecting that a person is seated, and particularly to a seat with a seating sensor suitable for application to a seat of an automobile.

  In order to detect that an occupant is sitting on the seat, a seating sensor may be provided on the upper surface of the seat. Thus, in the seat with the seating sensor provided with the seating sensor on the upper surface, a slab of about 5 mm or more thickness is pasted or the pad is covered so as to cover the sensor in order to prevent foreign objects when sitting. A frame laminate with a thickness of about 5 mm is applied to the skin.

Japanese Patent Application Laid-Open No. 11-34710 discloses a seat with a seating sensor in which a seat-like seating sensor is arranged inside a pad, and as one aspect thereof, a hole is formed upward from the bottom surface of a urethane foam pad. A configuration is described in which a urethane foam insert having the same size as the hole is inserted into the hole, and a seating sensor is disposed on the upper surface of the insert.
JP 11-34710 A

  In order to detect the weight of a seated occupant, it is conceivable to use a quantitative seating sensor whose output characteristics change in accordance with an increase in load, but this is expensive.

  An object of this invention is to provide the seat with a seating sensor which can detect the magnitude | size of passenger | crew weight with a simple structure.

  The seat with a seating sensor of the present invention (Claim 1) is a seat with a seating sensor in which a seating sensor for seating detection is provided inside the pad, and a plurality of the seating sensors are provided, and at least one of them is provided. An air gap is provided above or below the first seating sensor, and at least one second seating sensor has a pad in contact with both the upper side and the lower side.

The seat with a seating sensor according to claim 2 is a seat with a seating sensor in which a seating sensor for seating detection is provided inside the pad, wherein a plurality of the seating sensors are provided, and at least one of the first seating is provided. A first gap having a vertical interval d ₁ is provided above or below the sensor, and a second gap having a vertical interval d ₂ is provided above or below at least one second seating sensor, The vertical gaps d ₁ and d ₂ between the first gap and the second gap are different from each other.

  A seat with a seating sensor according to a third aspect is the binary type sensor according to the first or second aspect, wherein the first and second seating sensors are turned on when the load load exceeds a threshold value or the output level changes. It is characterized by that.

  The seat with a seating sensor according to claim 4 is characterized in that, in claim 3, the first and second seating sensors have the same threshold value.

  According to a fifth aspect of the present invention, the seat with the seating sensor according to any one of the first to fourth aspects is characterized in that the first seating sensor and the second seating sensor are arranged in different positions in the horizontal direction.

  The seat with a seating sensor according to a sixth aspect is characterized in that in any one of the first to fifth aspects, the first and second seating sensors are both in the form of a seat.

  The seat with a seating sensor according to claim 7 is the seat according to any one of claims 1 to 6, wherein a concave portion is provided upward from the bottom surface of the pad, and a soft body is inserted into the concave portion. Each seating sensor is installed in the upper surface part of this.

  A seat with a seating sensor according to an eighth aspect is characterized in that, in the seventh aspect, a convex portion is provided on an upper surface of the soft body, and the second seating sensor is disposed on the convex portion.

  The seat with a seating sensor according to claim 9 is the seat according to claim 8, wherein the first convex portion having a relatively low height on the upper surface and the second convex portion having a relatively high height on the upper surface are provided as the convex portions. The first seating sensor is disposed on the first convex portion, and the second seating sensor is disposed on the second convex portion.

  A seat with a seating sensor according to a tenth aspect is the seat according to any one of the first to ninth aspects, wherein another seating sensor is installed on the seating surface of the pad.

  The seat with a seating sensor according to claim 11 is a seat with a seating sensor provided with a seating sensor for seating detection, wherein the first seating sensor is installed on the seating surface of the pad, and the second inside the pad. The seating sensor is installed, and a gap is provided above or below the second seating sensor.

  In the seat with the seating sensor according to the first aspect, there is no gap on the upper and lower sides of the second seating sensor, and there is a gap on the upper side or the lower side of the first seating sensor.

  When an occupant with a small weight is seated, the seating load of the occupant is loaded on the second seating sensor, and the first seating sensor is not loaded with a load due to the remaining air gap, or the first seating sensor A small load that does not work is applied. For this reason, when an occupant with a small weight is seated, the second seating sensor detects the seating, and the first seating sensor does not detect the seating. Is detected to be small.

  In the seat with the seating sensor according to the second aspect, there is a large gap above or below the first seating sensor, and a small gap above or below the second seating sensor.

  When an occupant with a small weight is seated, the small gap in the second seating sensor portion is crushed, and the seating load of the occupant is applied only to the second seating sensor. On the other hand, the first seating sensor is not loaded with a load because the air gap remains, or a small load is applied so that the first seating sensor does not operate. For this reason, when an occupant with a small weight is seated, the second seating sensor detects the seating, and the first seating sensor does not detect the seating. Is detected to be small.

  In any one of claims 1 and 2, when an occupant with a large body weight is seated, both the first and second sensors detect the seating, so it is detected that the occupant with a large body weight is seated.

  Therefore, according to the present invention, as described in claim 3, as the seating sensor, it is possible to use a binary sensor that is turned on when the load load exceeds a threshold value or whose output level changes. This binary sensor has a simple configuration and a low cost compared to a load detection sensor whose output continuously increases in accordance with a change in load load.

  According to the present invention, as claimed in claim 4, as the first and second seating sensors, those having the same threshold value, for example, the same model, can be used. A sensor placement error or the like is prevented.

  The first and second seating sensors preferably have different horizontal arrangement positions. In order to improve the seating comfort of the seat, the seating sensor is preferably in the form of a seat.

  In the present invention, as described in claim 7, a concave portion is provided upward from the bottom surface of the pad, a soft body is inserted into the concave portion, and each seating sensor is installed on the upper surface portion of the soft body. It is good. In this case, it is preferable that a convex portion is provided on the upper surface of the soft body, and the second seating sensor is disposed on the convex portion. In particular, as the convex portion, a first convex portion having a relatively low top surface height and a second convex portion having a relatively high top surface height are provided. It is preferable that the first seating sensor is disposed on the second protrusion and the second seating sensor is disposed on the second convex portion. If it does in this way, the space | interval of the ceiling surface of a recessed part and the 1st and 2nd seating sensor can be changed with convex part height.

  In the seat with the seating sensor according to claim 11, when an occupant having a small weight is seated, the seating load of the occupant is loaded on the first seating sensor, and the second seating sensor has a gap due to the remaining air gap. The load is not applied, or a small load is applied so that the second seating sensor does not operate. For this reason, when an occupant having a small weight is seated, the first seating sensor detects the seating, and the second seating sensor does not detect the seating, so that the occupant is seated and the weight of the seated occupant Is detected to be small.

  Hereinafter, embodiments will be described with reference to the drawings. 1A is a longitudinal sectional view of the seat with a seating sensor according to the embodiment, taken along the front-rear direction, FIG. 1B is a sectional view taken along line BB in FIG. 1A, and FIG. It is sectional drawing which shows only the soft body of 1 (b). FIG. 1A is a cross-sectional view taken along the line AA in FIG.

  In this embodiment, a concave portion 2 facing upward is provided on the bottom surface below the bottom of the pad 1, and the soft body 3 is fitted into the concave portion 2. In addition, although the recessed part 2 and the soft body 3 are made into the shape which a lower side squeezes in order to prevent the drop-off | omission of the soft body 3, it is not limited to this. The soft body 3 may be bonded to the recess 2 or may be held by simply fitting.

  Both the pad 1 and the soft body 3 are made of polyurethane foam. The hardness characteristics of the pad 1 and the soft body 3 may be the same or different.

  On the upper surface of the soft body 3, a first protrusion 3a having a relatively low height and a second protrusion 3b having a relatively high height are provided. These convex portions 3 a and 3 b are provided near or near the center other than the periphery of the soft body 3. The top surfaces of the convex portions 3a and 3b are flat. The peripheral edge 3c of the soft body 3 is a flat top surface that is slightly higher than the second protrusion 3b.

  The first seating sensor 4 is installed on the upper surface of the first convex portion 3a, and the second seating sensor 5 is installed on the upper surface of the second convex portion 3b. These seating sensors 4, 5 are all flat sheet-like. The seating sensors 4 and 5 are binary sensors that are turned on when the applied load exceeds a threshold value or whose output level changes. The threshold values of the first and second seating sensors 4 and 5 are equal.

  The ceiling surface 2a of the recess 2 is a flat surface. In a state where the soft body 3 is fitted in the recess 2, the peripheral edge 3 c is in contact with the ceiling surface 2 a of the recess 2. Further, the entire upper surface of the second seating sensor 5 is in contact with the ceiling surface 2a. There is a gap between the upper surface of the first seating sensor 4 and the ceiling surface 2a. The upper surface of the first seating sensor 4 and the ceiling surface 2a are parallel to each other.

  When an occupant with a small weight is seated on the seat with the seating sensor configured as described above, the seating load is sufficiently applied to the second seating sensor 5, so that the second seating sensor 5 is turned on or is high. Output level. On the other hand, the first seating sensor 4 is not loaded at all, or is loaded with a small load of about the threshold value or less. For this reason, the first seating sensor 4 remains OFF or at a low output level. As a result, it is detected that an occupant having a small weight is seated.

  When an occupant with a large weight is seated, both the first and second seating sensors 4 and 5 are turned on or at a high output level, thereby detecting that an occupant with a large weight is seated.

  As described above, this seat with a seating sensor uses a binary sensor that is turned on when the load load exceeds a threshold value or whose output level changes, and is low in cost. Moreover, since the threshold values of the first and second seating sensors 4 and 5 are equal, it is possible to reduce the cost by using the same model. Moreover, since the same seating sensor should just be arrange | positioned on convex part 3a, 3b at the time of manufacture of a seat with a seating sensor, there is no mistake in a seating sensor etc., and manufacture is easy.

  In this embodiment, the seating sensors 4 and 5 are in the form of a sheet and are provided at a position deeper than the upper surface of the pad 1, so that the seating comfort is not affected at all or hardly.

  In this embodiment, the soft body 3 is provided with convex portions 3a, 3b having different heights, and the seating sensors 4, 5 are arranged on the convex portions 3a, 3b, thereby forming a gap above the seating sensor 4. Since the seating sensor 5 is in close contact with the ceiling surface 2a, the configuration is simple. Moreover, the space | interval of the 1st seating sensor 4 and the ceiling surface 2a can be changed by changing the height of the convex part 3a and the peripheral part 3c.

  In the above embodiment, the second seating sensor 5 is brought into contact with the ceiling surface 2a. However, a relatively small gap may be provided between the second seating sensor 5 and the ceiling surface 2a.

  In the above-described embodiment, the first and second seating sensors are provided. However, a third or more seating sensors having different gap intervals may be provided.

  In the above embodiment, the gap is formed on the upper side of the seating sensor. However, the seating sensor may be held on the ceiling surface 2a and the gap may be formed on the lower side of the seating sensor.

  In the above embodiment, the concave portion 2 is provided upward from the bottom surface of the pad 1, but as shown in FIG. 2, the concave portion 2 ′ is provided downward from the seating surface of the pad 1. The sensors 4 and 5 may be disposed on the bottom surface of 2 ′ in the same manner as described above, and the soft body 3 ′ may be fitted into the recess 2 ′. The soft body 3 ′ is in contact with the sensor 5, and there is a certain predetermined gap between the soft body 3 ′ and the sensor 4.

  3A and 3B are cross-sectional views of seats with seating sensors according to different embodiments.

  FIG. 3A is the same as FIG. 1, but the first seating sensor 4 is provided at the bottom of the concave portion and the convex portion provided on the upper surface of the soft body 3A, and the first surface is provided on the top surface of the convex portion. 2 is provided, and the rest of the configuration is the same as in FIG.

  In FIG. 3B, a concave portion and a convex portion are provided on the upper surface of the pad 1A, a first seating sensor 4 is provided on the bottom of the concave portion, and a second seating sensor 5 is provided on the top surface of the convex portion. A slab 6 is mounted on the upper side of the pad main body 1A. A gap 7 is formed between the lower side of the slab 6 and the first seating sensor 4.

  The weight of the seated occupant can also be detected by these seats with seating sensors shown in FIGS. 3A and 3B in the same manner as in the above embodiments. Further, by changing the depth of the recess, the distance between the first seating sensor 4 and the ceiling surface 2a or the slab 6 can be changed, and the detected weight can be changed.

  In the present invention, as shown in FIGS. 4A and 4B, the first seating sensor 8 is provided on the upper surface of the pads 1 and 1A, the second seating sensor 9 is provided inside the pad, and the upper side of the seating sensor 9 is provided. Or you may provide a space | gap on the lower side. When the seating load is small, only the seating sensor 8 is ON, and when the seating load is large, both the seating sensors 8 and 9 are ON.

  In the present invention, a plurality of the above aspects may be combined.

1A is a longitudinal sectional view of the seat with a seating sensor according to the embodiment, taken along the front-rear direction, FIG. 1B is a sectional view taken along line BB in FIG. 1A, and FIG. It is sectional drawing which shows only the soft body of 1 (b). Fig.2 (a) is a longitudinal cross-sectional view along the front-back direction of the seat with a seating sensor which concerns on another embodiment, FIG.2 (b) is a BB sectional drawing of Fig.2 (a). 3A and 3B are cross-sectional views of seats with seating sensors according to different embodiments. It is sectional drawing which shows another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1 ', 1A Pad 2,2' Concave part 3,3 ', 3A Soft body 4 1st seating sensor 5 2nd seating sensor 6 Slab 8 1st seating sensor 9 2nd seating sensor

Claims (11)

In a seat with a seating sensor in which a seating sensor for seating detection is provided inside the pad,
A plurality of the seating sensors are provided;
A gap is provided above or below at least one of the first seating sensors,
The seat with a seating sensor, wherein at least one second seating sensor has pads in contact with both the upper side and the lower side. In a seat with a seating sensor in which a seating sensor for seating detection is provided inside the pad,
A plurality of the seating sensors are provided;
A first gap having a vertical interval d ₁ is provided above or below at least one of the first seating sensors,
A second gap having a vertical interval d ₂ is provided above or below at least one second seating sensor;
A seat with a seating sensor, wherein the vertical gaps d ₁ and d _{2 of the first} gap and the second gap are different from each other.   3. The seat with a seating sensor according to claim 1, wherein the first and second seating sensors are binary sensors that are turned on or change in output level when a load exceeds a threshold value.   4. The seat with a seating sensor according to claim 3, wherein threshold values of the first and second seating sensors are the same.   The seat with a seating sensor according to any one of claims 1 to 4, wherein the first seating sensor and the second seating sensor are arranged in different positions in the horizontal direction.   The seat with a seating sensor according to any one of claims 1 to 5, wherein each of the first and second seating sensors has a sheet shape. In any one of Claims 1 thru | or 6, A recessed part is provided toward upper direction from the bottom face of this pad, and the soft body is inserted in this recessed part,
Each seating sensor is installed in the upper surface part of this soft body, The seat with a seating sensor characterized by the above-mentioned.   8. The seat with a seating sensor according to claim 7, wherein a convex portion is provided on an upper surface of the soft body, and the second seating sensor is disposed on the convex portion. In Claim 8, as a convex part, the 1st convex part whose height of an upper surface is relatively low, and the 2nd convex part whose height of an upper surface is relatively high are provided,
A seat with a seating sensor, wherein a first seating sensor is disposed on the first convex portion, and a second seating sensor is disposed on the second convex portion.   The seat with a seating sensor according to any one of claims 1 to 9, wherein another seating sensor is installed on the seating surface of the pad. In a seat with a seating sensor provided with a seating sensor for seating detection,
A first seating sensor is installed on the seating surface of the pad;
A seat with a seating sensor, wherein a second seating sensor is installed inside the pad, and a gap is provided above or below the second seating sensor.

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