JP5984019B2 - Load detection device for passenger seating detection - Google Patents

Description

  The present invention relates to a load detection device that is installed in a seat portion of a vehicle and detects a seated state of an occupant.

  2. Description of the Related Art Conventionally, in order to improve the performance of various safety devices such as seat belts and airbags installed in automobiles, there is a technique for detecting a state in which an occupant is seated on a vehicle seat and controlling these safety devices. As a load detection device suitable for detecting such a seated state of an occupant, there is a flexible film-like membrane switch. The seat portion and the backrest portion of the vehicle seat are configured by covering a pad member generally made of urethane or the like with a skin member such as cloth, vinyl leather, or leather. Specifically, the skin member is drawn into the groove provided on the surface of the pad member, and the drawn skin member is fixed to a mooring member (wire or resin rod) disposed in the vicinity of the groove inside the pad member ( The outer skin member is configured so as to follow the shape of the surface of the pad member.

  In the vehicle seat configured as described above, since the concave groove is often located in the seating portion of the pad member of the vehicle seat seat portion, the detection portion is provided between the detection portions of the load detection device (membrane switch). The conductive portion that transmits the signal of the above is in a state of crossing the concave groove. If the conductive portion is fixed and attached to the vehicle seat in a state of crossing the concave groove, when the load is applied to the vehicle seat, the conductive portion may be deformed and disconnected due to the deformation of the concave groove. Therefore, in order to prevent disconnection, the conducting portion is arranged in the recessed groove portion with a space, and the slack portion of the conducting portion is configured to be accommodated in the recessed groove. However, when an occupant sits on the vehicle seat, the concave groove is compressed in the depth direction, and the groove depth becomes shallow. For this reason, the sagging portion of the conducting portion is extremely bent at the bottom or edge of the groove, or the sagging portions are in strong contact with each other. When such a state is repeated, there is a possibility that the conducting portion of the load detection device is disconnected.

  For example, Patent Document 1 discloses a technique for preventing such disconnection of the conductive portion. In the technique of Patent Document 1, the load detection device is arranged between a seating side surface of a pad member having a recessed groove formed in a part and a skin member attached to the pad member so as to cover the seating side surface. A slidable contact portion in which a bent portion formed by bending at least a part of the conducting portion is inserted into the groove and traversed by the groove, and the back surface of the bent portion is in sliding contact with the inner surface of the groove facing the groove. In addition, a through hole that penetrates from the concave groove to the back surface of the pad member is drilled at the insertion position of the bent portion of the pad member, and is in sliding contact with the bent portion when the pad member is compressed and deformed from above by a seating load. The bent portion is movable in the vertical direction in the through hole by sliding with the portion.

JP 2011-230588 A

  However, Patent Document 1 has the following problems. That is, since the above-described through hole causes the wind of the ventilation fan provided below to be blown to the occupant's buttocks seated, the wind to be blown to the occupant's leg through a ventilation path different from the through hole. Will reduce the airflow.

  The present invention has been made in view of the above-described problems, and is a load detection device that can prevent extreme bending due to slack in the load detection device without providing a through-hole that removes slack in the load detection device in the seat pad member. The purpose is to provide.

In order to achieve the above object, the invention according to claim 1 is characterized in that the pad member is interposed between the pad member (2) and the skin member (5, 50) of the seat seat (1) on which the occupant sits. in passenger seating detection load detecting device which is provided so as to cross the groove (3) is engraved on the upper surface of (2) (4), the detection unit for detecting a load (7) other sensing section (7) The ribbon-shaped conducting portion (9) that is electrically connected to each other or is electrically connected to the detecting portion (7) and the connector (12) and is accommodated in the concave groove (3) has a shape in which both side portions are not cut out. And side walls (11, 110) formed so as to form one or a plurality of S-shapes together with the bottom (10) by alternately notching both sides thereof, and the side walls The notch forming the part (11, 110) has a longitudinal direction in the longitudinal direction of the conducting part (9). Characterized in that it is formed in the rectangle matches the labels.

  According to this configuration, the conduction part (9) has one or more S-shaped parts together with the bottom part (10) having a shape in which both side parts are not cut out and the bottom part (10) by alternately cutting out both side parts. And side wall portions (11, 110) formed to have a shape. Therefore, when the occupant is seated, the depth of the concave groove (3) becomes shallow and slack occurs in the conductive portion (9), and even when the conductive portion (9) is bent so as to contact each other, the side wall portion (11 , 110) is a longitudinal portion in which both sides of the conducting portion (9) are alternately cut out to form an S shape, so that the side wall portions (11, 110) do not come into contact with each other. Further, the S-shaped shape provides stretchability in the longitudinal direction of the conducting portion (9). Therefore, the sag of the conduction part (9) is effectively avoided or absorbed, and an excellent effect is obtained that damage to the conduction part (9) can be prevented.

It is a top view of the state which removed the skin member in the seat seat part which enforces this invention. It is a side view by the II-II line cross section of the seat seat part shown in FIG. It is a top view of the load detection apparatus of this invention. It is sectional drawing of the IV-IV line which shows the detection part of the load detection apparatus shown in FIG. It is sectional drawing of the VV line which shows the conduction | electrical_connection part of the load detection apparatus shown in FIG. It is a perspective view which shows a state when the load detection apparatus of FIG. 3 is mounted | worn in the ditch | groove of a seat seat part as shown in FIG. FIG. 4 is a perspective view showing a state when the load detecting device of FIG. 3 is mounted in a recessed groove of a seat seat portion and an occupant is seated as shown in FIG. 1. It is the elements on larger scale which show the other example in the conduction | electrical_connection part of the load detection apparatus shown in FIG. It is the elements on larger scale which show the state which the longitudinal direction of the conduction | electrical_connection part shown in FIG. 8 shrunk | reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, in all the drawings in this specification, portions corresponding to each other or portions having the same function are denoted by the same reference numerals, and description of the overlapping portions will be omitted as appropriate. In the drawings (particularly, cross-sectional views), the scales of the upper, lower, left and right are changed and displayed.

  As shown in FIG. 1 and FIG. 2, a seat seat 1 of a vehicle is composed of a pad member 2 having cushioning properties made of urethane or the like, and an upper surface of the pad member 2 made of cloth, vinyl leather, leather, or the like. And a skin member 5 that wraps the side surface, and a load detection device 4 interposed between the pad member 2 and the skin member 5.

  A plurality of concave grooves 3 are engraved on the upper surface (upper in FIG. 2) of the pad member 2 in order to draw the skin member 5 and follow the surface shape of the pad member 2. In addition, on the lower surface of the pad member 2, the cooling air of the cooling fan 6 installed below the pad member 2 that is not essential is guided to the front portion (left side in FIGS. 1 and 2) of the seat seat portion 1. A passage (not shown) is provided.

  As shown in FIGS. 3 to 5, the load detection device 4 includes a membrane switch-like detection unit 7 and conduction units 8 and 9 formed by bonding first film members 14 and 19 and second film members 15 and 20 together. And the connector 12.

  The 1st film member 14 is a flat film shape, Comprising: Resin which has flexibility (for example, PEN etc.) is mainly formed. On one surface side of the first film member 14, a silver layer S1 printed with silver (Ag), which is a conductive material, and a carbon layer S2 printed with carbon (C) on one surface side of the silver layer S1 are silver layers. It is formed so as to cover S1. The other surface side of the first film member 14 constitutes a coating layer F1 that covers the silver layer S1 and the carbon layer S2. That is, the first film member 14 has a first conductive layer (silver layer S1 and carbon layer S2) and a coating layer F1.

  Similar to the first film member 14, the second film member 15 has a flat film shape and is mainly formed of a flexible resin (for example, PEN). A silver layer S5 printed with silver as a conductive material is formed on one side of the second film member 15, and a carbon layer S4 printed with carbon on the other side of the silver layer S5 is formed so as to cover the silver layer S5. Has been. The other surface side of the second film member 15 constitutes a coating layer F2 that covers the silver layer S5 and the carbon layer S4. That is, the 2nd film member 15 has the 2nd conductive layer (silver layer S5 and carbon layer S4), and coating layer F2.

  The spacer member 16 has a flat shape and is formed of a flexible insulating resin (for example, PET). The spacer member 16 is disposed between the one surface side (carbon layer S2) of the first film member 14 and the one surface side (carbon layer S4) of the second film member 15. The spacer member 16 has a donut shape in plan view. In other words, the spacer member 16 has a through-hole 17 in the approximate center in plan view. The penetrating portion 17 is formed by vertically penetrating the substantial center of the spacer 16. A space layer S <b> 3 is formed between the first conductive layer and the second conductive layer by the penetrating portion 17.

  The adhesive member 18 is an adhesive material, and is one side of the first film member 14 (carbon layer S2) and one side of the spacer member 16, and one side of the second film member 15 (carbon layer S4) and the spacer member. The other side of 16 is bonded. In the present embodiment, an acrylic pressure-sensitive adhesive material is used as the adhesive member 18.

  The conduction parts 8 and 9 are parallel ribbon-shaped parts other than the detection part 7 in the sensor main body 41. Specifically, the conduction parts 8 and 9 are wiring parts that electrically connect the detection part 7 and the adjacent detection part 7 or the detection part 7 and the connector 12. Although the conductive portion 9 is illustrated as having the bottom portion 10 and the side wall portion 11 of the present invention, the conductive portion 8 may be configured to have the bottom portion 10 and the side wall portion 11. As shown in FIG. 5, the conducting portions 8 and 9 include a first film member 19, a second film member 20, a spacer member 21, and an adhesive member 22.

  The 1st film member 19 is a flat film shape, Comprising: Resin which has flexibility (for example, PEN etc.) is mainly formed. The first film member 19 is formed integrally with the first film member 14 of the detection unit 7. That is, the first film members 14 and 19 are one film member.

  On one surface side of the first film member 19, a silver layer S1 printed with silver as a conductive material and a carbon layer S2 covering the silver layer S1 are formed. The other surface side of the first film member 19 constitutes a coating layer F1 that covers the silver layer S1 and the carbon layer S2. That is, the 1st film member 19 has the 1st conductive layer (silver layer S1 and carbon layer S2) and the coating layer F1 similarly to the detection part 7. FIG.

  The 2nd film member 20 is a flat film shape, Comprising: Resin which has flexibility (for example, PEN etc.) is mainly formed. The second film member 20 is formed integrally with the second film member 15 of the detection unit 7. That is, the second film members 15 and 20 are one film member.

  On one surface side of the second film member 20, a silver layer S5 printed with silver as a conductive material and a carbon layer S4 covering the silver layer S5 are formed. The other surface side of the second film member 20 constitutes a coating layer F2 that covers the silver layer S5 and the carbon layer S4. That is, the 2nd film member 20 has the 2nd conductive layer (silver layer S5 and carbon layer S4) and the coating layer F2 similarly to the detection part 7. FIG.

  The spacer member 21 has the same flat shape as the film members 19 and 20, and is formed of a flexible insulating resin (for example, PET). The spacer member 21 is disposed between one surface side (carbon layer S2) of the first film member 19 and one surface side (carbon layer S4) of the second film member 20. The spacer member 21 is not formed with the through portion 17. That is, the space layer S3 does not exist in the conductive portions 8 and 9. The spacer member 21 is formed integrally with the spacer member 16. That is, the spacer members 16 and 21 are made of one part.

  The adhesive member 22 bonds the one surface side of the first film member 19 and the one surface side of the spacer member 21, and the one surface side of the second film member 20 and the other surface side of the spacer member 21. In the present embodiment, an acrylic pressure-sensitive adhesive material is used as the adhesive member 22 in the same manner as the adhesive member 18.

  The connector 12 is connected to one end of the sensor main body 41, and performs electrical connection between the sensor main body 41 and the external device 13 such as an ECU or a seat belt buckle switch. The sensor body 41 has the connector 12 fixed at one end and the detection unit 7 disposed at the other end. The sensor body 41 has a longitudinal direction from one end to the other end (the other end to one end).

  When the occupant is seated on the vehicle seat seat 1, the detection unit 7 is pressed downward in FIG. 4 by the first film member 14 and the second film member 15 in the upward direction, and the first conductive layer S1 in the space layer S3. , S2 and the second conductive layers S4, S5 are in contact with each other. As a result, the first conductive layers S 1 and S 2 and the second conductive layers S 4 and S 5 are electrically connected (electrically connected), and electrical connection (ON) information is transmitted to the external device 13 via the connector 12. In this way, the load detection device 4 can detect the seating of the occupant.

  In addition, although the detection part 7 of the sensor main body 41 showed the example arrange | positioned linearly, you may branch and arrange | position the conduction | electrical_connection parts 8 and 9. Further, the number of the detection units 7 and the interval between them are arbitrarily set according to the shape and physique of the seat seat 1.

  The load detection device 4 is installed so as to cross the concave groove 3. In that case, the conduction | electrical_connection part 9 provided between arbitrary detection parts 7 of the load detection apparatuses 4 or between the detection part 7 and the connector 12 is accommodated in the ditch | groove 3 in the state as shown in FIG.

  As shown in FIG. 3, the conducting portion 9 is located at the center in the longitudinal direction of the conducting portion 9 and has the same width dimension as the width of the conducting portion 9 (in other words, both side portions are not cut away). And a side wall 11 which is a remaining part of one side of the conduction part 9 cut out in a rectangular shape on one side in the longitudinal direction of the conduction part 9 of the bottom 10 and a conduction part 9 side on the other side in the longitudinal direction of the conduction part 9 of the bottom 10 And a side wall portion 11 which is a remaining portion obtained by cutting out the other of the portions into a rectangle. That is, the side wall part 11, the bottom part 10, and the side wall part 11 exhibit an S shape. Further, other side wall portions 11 may be additionally provided so that the same number of S-shapes are continuously formed on both outer sides in the longitudinal direction of the conductive portion 9 of each side wall portion 11.

  When the conducting portion 9 is stored in the concave groove 3, the bottom portion 10 approaches or contacts the bottom surface of the concave groove 3, and the side wall portion 11 approaches or contacts the side wall surface of the concave groove 3. Therefore, the dimension in the longitudinal direction of the bottom portion 10 is close to the width dimension of the bottom surface of the groove 3, and the dimension in the longitudinal direction of the sidewall portion 11 (when there are a plurality of sidewall portions 11 on each side portion of the conducting portion 9, Is preferably close to the depth dimension of the groove 3.

  As shown in FIG. 7, in the conducting portion 9 housed in the concave groove 3, the side wall portion 11 bends when the depth of the concave groove 3 is reduced by the seating of the occupant and the bottom portion 10 is pressed. At this time, since the side wall portions 11 located on both sides in the longitudinal direction of the bottom portion 10 are arranged separately on both sides of the conducting portion 9, the surfaces do not contact each other. In order to reliably avoid this contact and contact between the inner side portions of the side wall portion 11, the width direction dimension of the side wall portion 11 is the sum of the width dimensions of the side wall portions 11 adjacent to the bottom portion 10. Preferably it is smaller than the dimensions. Moreover, it is preferable that the inner side parts of the side wall part 11 adjacent to the bottom part 10 are parallel to each other and have an appropriate length. Therefore, the cutout forming the side wall 11 is rectangular.

  Next, another embodiment of the conduction part 9 will be described with reference to FIGS. The conducting part 23 is an alternative to the conducting part 9 and is provided with a plurality of side wall parts 110 alternately on both sides in the longitudinal direction of the conducting part 23 so as to form a plurality of the above-mentioned S-shapes.

  When the conducting portion 23 is accommodated in the concave groove 3, the bottom portion 10 and the side wall are arranged so that the bottom portion 10 comes close to or abuts on the bottom surface of the concave groove 3 and the side wall portion 110 comes close to or abuts on the side wall surface of the concave groove 3. The position of the part 110 is set. Further, as shown in FIG. 9, the side wall portion 110 of the conducting portion 23 is formed with a plurality of rounded corner portions so that it can be easily shrunk without significant deformation, so that the stretchability based on the S-shape is further improved. Let

  As is clear from the above detailed description, according to the passenger seating detection load detecting device of the present embodiment, the conduction portion 9 has the bottom portion 10 having a shape in which both side portions thereof are not cut and the both side portions alternately. And side wall portions 11 and 110 formed so as to form one or a plurality of S-shapes together with the bottom portion 10.

  Therefore, when the occupant is seated, the depth of the concave groove 3 becomes shallow and slack occurs in the conductive portion 9, and even when the conductive portions 9 are bent so that the conductive portions 9 come into contact with each other, the side wall portions 11, 110 are connected to the conductive portion 9. Since the both side portions are alternately cut out in the longitudinal direction having an S shape, the side wall portions 11 and 110 do not contact each other. Further, the S-shaped shape provides stretchability in the longitudinal direction of the conducting portion 9. Therefore, the sag of the conduction part 9 is effectively avoided or absorbed, and an excellent effect is obtained that damage to the conduction part 9 can be prevented.

  Further, the inner side portions of the side wall portions 11 adjacent to the bottom portion 10 are parallel to each other, and the total width dimension of the side wall portions 11 is smaller than the width size of the conductive portion 9, so Strong contact on the side surface can be avoided, and damage to the conductive portion 9 can be effectively prevented.

  Moreover, since the side wall part 110 has a round corner | angular part and is provided with two or more, slack can be absorbed effectively, without deform | transforming the conduction | electrical_connection part 9 extremely.

  In addition, this invention includes what can be implemented in the aspect which added various change, correction, improvement, etc. based on the knowledge of those skilled in the art. Further, it goes without saying that any of the embodiments to which the above-mentioned changes are added is included in the scope of the present invention without departing from the gist of the present invention.

  For example, in the above embodiment, a membrane switch-like ON / OFF type detection unit is arranged. However, for example, a load detection type using a pressure sensitive ink, a piezoelectric element (piezo element), a strain gauge (strain gauge), etc. It is also possible to apply a capacitance type sensor that detects the seating or physique of the occupant based on the change in capacitance. Moreover, in the said embodiment, although the total four detection parts were arrange | positioned, the arrangement number of a detection part is not specifically limited. Moreover, the arrangement | positioning location and the number of arrangement | positioning of a ditch | groove are not specifically limited.

DESCRIPTION OF SYMBOLS 1 Seat seat part 2 Pad member 3 Concave groove 4 Load detection apparatus 5 Skin member 7 Detection part 8,9 Conduction part 10 Bottom part 11,110 Side wall part

Claims (2)

Between the pad member (2) and the skin member (5, 50) of the seat seat (1) on which the occupant sits, so as to cross the concave groove (3) carved on the upper surface of the pad member (2). In the provided occupant seating detection load detection device (4),
A ribbon that is electrically connected to the detection unit (7) that detects the load and the other detection unit (7) or is electrically connected to the detection unit (7) and the connector (12) and is accommodated in the groove (3). The conductive part (9)
A bottom portion (10) having a shape in which both side portions are not cut out;
Side wall portions (11, 110) formed so as to exhibit one or a plurality of S-shapes together with the bottom portion (10) by alternately cutting out both side portions thereof;
With
The notch forming the side wall portions (11, 110) is formed in a rectangular shape so that the longitudinal direction thereof coincides with the longitudinal direction of the conducting portion (9), and the load detection device for occupant seating detection is provided. . The inner side portions of the side wall portions (11) adjacent to the bottom portion (10) are parallel to each other, and the total width dimension of the side wall portions (11) is greater than the width size of the conductive portion (9). The load detection device for passenger seating detection according to claim 1, wherein the load detection device is small .

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