JP6930313B2 - Seat belt device - Google Patents

Description

The present invention relates to a seatbelt device including a seatbelt containing a conductive thread.

Conductive fabrics containing conductive threads are known. This conductive fabric is used, for example, as a seat cover for a vehicle seat provided with a seat heater and a seating sensor. Patent Document 1 discloses a conductive fabric containing ultrafine fibers having a single fiber diameter of 10 to 1000 nm and conductive fibers having a single fiber diameter of more than 1000 nm.

The use of conductive fabrics for webbing that functions as a long occupant restraint belt (seat belt) that restrains occupants in a vehicle is being studied. When the webbing is pulled out from the take-up device (retractor) or taken up in the take-up device, the webbing travels in a state of being in sliding contact with various members such as a webbing guide. When a conductive fabric as described in Patent Document 1 is used for such webbing, conductive fibers having a large single fiber diameter may slide with the webbing guide or the like and wear, resulting in disconnection (cutting). ..

Patent Document 2 describes a belt load sensor that detects electrical discontinuity by a sensor when the conductive fibers woven into the seatbelt breaks and notifies the driver that an excessive load has been applied to the seatbelt. It is disclosed. However, Patent Document 2 does not disclose how conductive fibers are woven. Further, the specific configuration of the power supply means is not disclosed.

Japanese Unexamined Patent Publication No. 2010-7201 U.S. Pat. No. 6211793 European Patent No. 2399477 U.S. Pat. No. 7,752,925

An object of the present invention is to provide a seatbelt device capable of supplying power while suppressing wear of conductive threads.

The seatbelt device of the present invention is configured by using a webbing in which warp threads and weft threads are woven so as to extend perpendicularly to each other, the warp threads include conductive threads and non-conductive threads, and the non-conductive threads are thicker than the conductive threads. The seatbelt is provided, a retractor for winding the seatbelt, and a power feeding means for supplying power to the conductive yarn in the retractor.

In one aspect of the invention, the feeding means has a sheet metal electrode that is electrically connected to a power source.

In one aspect of the present invention, the retractor has a spool for winding up a seatbelt, and the spool has a slit through which the base end side of the seatbelt is inserted and a shaft protruding outward from the side of the spool. The thin plate metal electrode has a portion, and the thin plate metal electrode has a tubular portion that is externally fitted to the shaft portion and a lead portion that is arranged in the slit.

In one aspect of the present invention, the conductive thread and the thin metal electrode are conducted by a pin that is pierced through the seat belt and conducts to the conductive thread.

In one aspect of the present invention, a loop portion is formed on the base end side of the seat belt, a first terminal semifield having the pin is arranged in the loop portion, and a second terminal is arranged outside the loop portion. The semifield is arranged, the pin is pierced through the loop portion and engages with the second terminal half, and the second terminal half is in contact with the lead portion of the thin metal electrode.

In one aspect of the present invention, a notch is provided at the inlet edge of the slit, a terminal having the pin is arranged at the inlet of the slit, and a loop portion is provided on the base end side of the seat belt. A stopper rod is inserted into the loop portion, the loop portion and the terminal are conductive, the pin is pierced through a seat belt wound on the spool, and the pin is the conductive thread. Contact.

In one aspect of the present invention, it has a jack mounted on the cylinder portion of a thin plate metal electrode fitted on the shaft portion.

In one aspect of the present invention, a conductive bearing is mounted on the tubular portion of the thin plate metal electrode fitted on the shaft portion.

The seatbelt device of the present invention can supply power to the conductive yarn while suppressing wear of the conductive yarn.

It is a schematic block diagram of the seat belt device which concerns on embodiment. It is a perspective view of the webbing which concerns on embodiment. It is an enlarged plan view of the webbing which concerns on embodiment. FIG. 3 is a sectional view taken along line IV-IV of FIG. FIG. 3 is a sectional view taken along line VV of FIG. FIG. 3 is a sectional view taken along line VI-VI of FIG. FIG. 3 is a cross-sectional view taken along the line VII-VII of FIG. It is sectional drawing of the webbing which concerns on embodiment. It is sectional drawing of the webbing which concerns on another embodiment. It is sectional drawing which shows the connection state of an electric device and a conductive thread. It is a perspective view of a spool. It is a perspective view explaining the film electrode. FIG. 11 is a cross-sectional view taken along the line XIII-XIII of FIG. It is an enlarged view of a part of FIG. It is a perspective view of the base end portion of a seat belt. FIG. 4 is a cross-sectional view taken along the line XVI-XVI of FIG. It is a perspective view which shows the engagement relationship between the base end portion of a seat belt and a terminal. It is an exploded view of a terminal. It is an exploded view of a terminal. It is a perspective view of the spool which concerns on another embodiment. It is a perspective view which shows the engaging relationship of a spool, a film electrode and a terminal of FIG. It is sectional drawing of the spool of FIG. FIG. 22 is a cross-sectional view taken along the line XXIII-XXIII of FIG. It is an exploded perspective view which shows the electrical connection structure to a film electrode. It is a cross-sectional view of Jack. It is an exploded perspective view which shows the electrical connection structure to a film electrode.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the seatbelt device 10 according to the present embodiment includes a seatbelt 12 that restrains an occupant to the seat S, a retractor 13 that winds the seatbelt 12 from the base end side, and a seatbelt provided on the vehicle body side. The belt anchor 16 that guides the seat belt 12, the belt anchor 25 that fixes the tip of the seat belt 12 to the vehicle body side (vehicle body or seat S), the buckle 14 arranged on the side surface of the seat S, and the seat belt 12 are arranged. It is equipped with a tongue 15.

The pillar P is arranged at a position adjacent to the seat S, the retractor 13 is arranged in the pillar P, and the belt anchor 16 is arranged on the surface of the pillar P. In the seatbelt device 10, the occupant can be restrained to the seat S by the seatbelt 12 by pulling out the seatbelt 12 and fitting the tongs 15 to the buckle 14.

FIG. 2 is a perspective view of the webbing 1 constituting the seatbelt 12, FIG. 3 is an enlarged plan view of the webbing, and FIGS. 4 to 7 are IV-IV, VV, and VI-VI of FIG. 3, respectively. It is a figure which shows a part of the cross section along the line, VII-VII line.

The webbing 1 is made of a woven fabric in which warp threads (warp threads) and weft threads (weft threads) are woven so as to extend at right angles to each other, and is woven by, for example, a 2/2 diagonal weave. One of the plurality of warp threads is a conductive thread 2, and the other warp threads are non-conductive threads 3. The conductive thread 2 is provided along the longitudinal direction of the webbing 1. The weft 4 is a non-conductive yarn.

The weaving method of the warp yarns (conductive yarn 2 and non-conductive yarn 3) and the weft yarn 4 will be described with reference to FIG. The warp threads pass over the two weft threads 4 and then repeatedly pass under the two weft threads 4. For example, the non-conductive yarn 3A passes above the weft yarns 4A and 4B and below the weft yarns 4C and 4D.

The non-conductive yarn 3B adjacent to the non-conductive yarn 3A across the conductive yarn 2 passes over the weft yarn 4A, then under the weft yarns 4B and 4C, and above the weft yarns 4D and 4E. The non-conductive yarn 3C adjacent to the non-conductive yarn 3B passes under the weft yarn 4A, then on the weft yarns 4B and 4C, and under the weft yarns 4D and 4E.

The conductive yarn 2 extends between the two non-conductive yarns 3A and 3B, and the way of interlacing with the weft yarn 4 is one of the two non-conductive yarns 3A and 3B (not in the example shown in FIG. 3). It is the same as the conductive thread 3A). That is, the conductive yarn 2 passes above the weft yarns 4A and 4B and below the weft yarns 4C and 4D.

The conductive yarn 2 is a multifilament yarn obtained by twisting and converging a plurality of conductive filaments. As the conductive filament, for example, a polyester fiber, a nylon fiber, or the like coated with a metal such as a body by a vacuum deposition method or the like can be used. The thickness (fineness) of the conductive yarn 2 which is a multifilament yarn is 750D or less.

As the non-conductive thread 3, polyester fiber, nylon fiber and the like can be used, and the non-conductive thread 3 is thicker than the conductive thread 2. The thickness (fineness) of the non-conductive yarn 3 is preferably 1.3 times or more, particularly about 2 to 6 times the thickness of the conductive yarn 2. As the weft 4, polyester fiber, nylon fiber and the like can be used, and the thickness (fineness) is about 250 to 1000D.

Since the conductive thread 2 is thinner than the non-conductive thread 3, as shown in FIG. 4, the upper part of the conductive thread 2 is located lower than the upper part of the adjacent non-conductive threads 3A and 3B at the intersection with the weft thread 4A. be. Further, as shown in FIG. 5, at the intersection of the conductive yarn 2 and the weft yarn 4B, the upper portion of the conductive yarn 2 is from the upper portion of the non-conductive yarn 3A and the upper portion of the non-conductive yarn 3C adjacent to the non-conductive yarn 3B. Is also in a low position.

When the upper surface side of the webbing 1 slides in contact with another member, the conductive thread 2 is placed in the spaces S1 and S2 surrounded by the sliding surfaces L1 of the member, the non-conductive threads 3A to 3C, and the weft threads 4A and 4B. The upper part of the conductive thread 2 does not come into contact with the member, or even if it comes into contact with the member, the frictional force can be suppressed. Therefore, the wear of the conductive thread 2 is suppressed.

As shown in FIG. 6, at the intersection of the conductive yarn 2 and the weft yarn 4C, the lower portion of the conductive yarn 2 is located higher than the lower portion of the adjacent non-conductive yarns 3A and 3B. Further, as shown in FIG. 7, at the intersection of the conductive yarn 2 and the weft yarn 4D, the lower portion of the conductive yarn 2 is from the lower portion of the non-conductive yarn 3A and the lower portion of the non-conductive yarn 3C adjacent to the non-conductive yarn 3B. Is also in a high position.

When the lower surface side of the webbing 1 slides in contact with another member, the conductive thread 2 is placed in the spaces S3 and S4 surrounded by the sliding surfaces L2 of the member, the non-conductive threads 3A to 3C, and the weft threads 4C and 4D. The lower portion of the conductive thread 2 does not come into contact with the member, or even if it comes into contact with the member, the frictional force can be suppressed. Therefore, the wear of the conductive thread 2 is suppressed.

Further, since the conductive thread 2 is a multifilament thread in which a plurality of conductive filaments are converged, excellent conductivity can be obtained.

In the example of FIG. 2, the conductive thread 2 is provided at the central portion in the width direction orthogonal to the longitudinal direction of the webbing 1, but the position and number of the conductive threads 2 are not limited to this. As described above, in protecting the conductive thread 2 from friction with other members, the non-conductive threads 3A and 3B adjacent to the conductive thread 2 and the non-conductive thread 3C adjacent to the non-conductive thread 3B are used. Therefore, when a plurality of conductive threads 2 are provided, it is preferable to arrange at least one non-conductive thread 3 between the conductive threads 2 and 2, and it is more preferable to arrange two or more non-conductive threads 3.

As shown in FIG. 8, the conductive threads 2 may bite into two adjacent non-conductive threads 3A and 3B, and the non-conductive threads 3A and 3B may cover the conductive threads 2. As shown in FIG. 9, the conductive thread 2 may have a cross-sectional shape other than a circular shape.

As shown in FIG. 1, the seat belt 12 is provided with an electric device 20 electrically connected to the conductive thread 2. The electric device 20 is, for example, a microphone, a speaker, a biological sensor, a belt extension amount detection sensor, a heater material, a weight detection sensor for a lashing belt, and the like. FIG. 10 is a cross-sectional view showing an example of a contact state between the electric device 20 and the conductive thread 2. Since the seat belt 12 suppresses the wear of the conductive thread 2, the electric device 20 can be operated in a favorable environment.

In the present embodiment, in the retractor 13, electric power is supplied to the conductive thread 2 of the seat belt 12 by the power feeding means.

The power feeding structure to the conductive thread 2 in the retractor 13 will be described with reference to FIGS. 11 to 19.

FIG. 11A is a perspective view of the spool 30 before mounting the film electrode 40 as a thin metal electrode, FIG. 11B is a perspective view of the spool 30 mounted with the film electrode 40, and FIG. 12 is 1. It is a perspective view of a pair of film electrodes 40, 40.

The spool 30 has a body portion 31, a pair of flange portions 32, and a shaft portion 33 protruding outward from the center portion of each flange portion 32.

The body 31 is provided with slits 34, 34 through which the seat belt 12 is passed. Each slit 34 penetrates the non-axial core line position of the body portion 31 in the chord direction and in the parallel direction to each other in the cross section of the spool 30. A recess 35 into which the film electrode 40 enters is provided on the outer peripheral surface of the flange portion 32.

The film electrode 40 has a cylindrical tubular portion 41 that fits outside the shaft portion 33, a first lead portion 42 that is connected to the tubular portion 41 and rises in the radial direction along the outer surface of the flange portion 32, and a first lead portion. A second lead portion 43 connected to the tip of the 42 and received by the recess 35, and a third lead portion 44 connected to the second lead portion 43 and extending toward the slit 34 along the inner surface of the flange portion 32. , It has a planar fourth lead portion 45 which is connected to the third lead portion 44 and is arranged in the slit 34. The fourth lead portion 45 overlaps the surface 34a on the axial side of the slit 34. After mounting the film electrode 40 on the spool 30, an electrode fixing ring 37 made of an insulating material is fitted to each flange portion 32.

The attachment structure of the seat belt 12 to the spool 30 on the base end side will be described with reference to FIGS. 13 to 19.

The base end side of the seat belt 12 is inserted into the slits 34 and 34, and the stopper portion 12S on the base end side of the seat belt 12 is locked to the inlet portion of one of the slits 34. The base end side of the seat belt 12 is folded back and overlapped, and sutured by the suture thread 12i to form a loop portion 12a for inserting a terminal. The first terminal semifield 47 is inserted into the loop portion 12a. Two pins 48 are erected on the first terminal semifield 47. The pin 48 is pierced through the seat belt 12 and projects to the outside of the loop portion 12a. The pin 48 is pierced through the seat belt 12 so as to come into contact with the conductive thread 2. The second terminal semifield 50 is arranged outside the loop portion 12a so as to face the first terminal semifield 47, and the terminal semifields 48 and 50 are connected to each other by the pin 48.

As shown in FIG. 18, the second terminal semifield 50 has a left conductor 51, a right conductor 52, and a non-conductive intervening body 53 connecting them. The left conductor 51 and the right conductor 52 have a flat tubular shape having through holes 51a and 52a penetrating in the tubular axis direction. The interposition 53 has a pair of insertion portions 53a inserted into the through holes 51a and 52a, and a main body portion 53b arranged between the left conductor 51 and the right conductor 52. A pin insertion hole 54 is provided so as to penetrate the left conductor 51, the right conductor 52, and the left and right insertion portions 53a. As shown in FIGS. 16 and 17, the pin 48 is inserted into the pin insertion hole 54, and the terminal semifields 47 and 50 are connected by caulking the tip end side of the pin 48. Further, each conductive thread 2 is electrically connected to the left conductor 51 and the right conductor 52 via the pin 48.

When the seat belt 12 inserted through the slit 34 is pulled so that the stopper portion 12S is pulled into the slit 34, the left conductor 51 and the right conductor 52 of the second terminal semifield 50 are the fourth leads of the film electrodes 40, respectively. It is pressed against the portion 45. As a result, the conductive thread 2 conducts to the tubular portion 41 of the film electrode 40.

The terminal half body 50 of FIG. 18 has a configuration in which the left and right insertion portions 53a and 53a of the intervening body 52 are inserted into the through holes 51a and 52a of the left conductor 51 and the right conductor 52. Like the terminal semifield 60 of 19, a through hole 63a is provided in the insulating interposition 63, and the insertion portions 61a and 62a provided in the left conductor 61 and the right conductor 62 are inserted into the through hole 63a, respectively. good. The left conductor 61 and the right conductor 62 are provided with pin insertion holes 64. The terminal half body 60 is inserted into the loop portion 12a in the same manner as the terminal half body 50, and is connected to the terminal half body 47 by a pin 48.

The power feeding structure to the conductive thread 2 according to another embodiment will be described with reference to FIGS. 20 to 23.

In this embodiment, two notches 69 are provided at the inlet edge of the slit 34 of the spool 30A. Two pins 74 erected from the terminal 70 that also serves as a stopper engage with the notches 69 and 69, and protrude from the outer peripheral surface of the body portion 31A.

The terminal 70 has a left conductor 71, a right conductor 72, and an insulating intermediary 73 connecting these conductors. Each pin 74 is erected from the left conductor 71 and the right conductor 72, respectively. The left conductor 71 and the right conductor 72 are connected by any of the connecting structures shown in FIGS. 18 and 19.

The left and right flange portions 32A of the spool 30A are provided with small holes 32b that communicate the inside of the slit 34 and the outer surface of the flange portion 32A.

The film electrode 40A has a cylindrical tubular portion 41A, a first lead portion 42A, and a second lead portion 43A. The second lead portion 43A is inserted into the slit 34 through the small hole 31b.

The stopper rod 76 is inserted into the loop portion 12a formed on the base end side of the seat belt 12. The terminal 70 is arranged at the inlet of one slit 34 and the pin 74 is engaged with the notch 69. Further, the second lead portion 43A of the film electrode 40A is superposed on the left conductor 71 and the right conductor 72, respectively. When the seatbelt 12 is passed through the slit 34 and the loop portion 12a of the seatbelt 12 is pulled so as to be pulled into the slit 34, the loop portion 12a is pressed against the terminal 70 via the second lead portion 43A. As a result, the loop portion 12a is locked to the inlet edge of the slit 34, and the left conductor 71 and the right conductor 72 are electrically connected to the left and right film electrodes 40A and 40A.

When the seatbelt 12 is wound around the body portion 31A of the spool 30A, the pin 74 is pierced through the seatbelt 12 and the pin 74 comes into contact with the conductive thread 2 as shown in FIGS. 22 and 23. As a result, the conductive thread 2 conducts to the film electrode 40A via the terminal 70.

A power feeding circuit is connected to the film electrode 40 or 40A conducting on the conductive thread 2 via the jack 80 shown in FIGS. 24 and 25 or the conductive bearing 88 shown in FIG. 26.

The jack 80 has an insertion hole 81 into which the tubular portion 41 or 41A is inserted. The inner peripheral surface of the insertion hole 81 is made of a conductive material 82, and an insulating material 83 is provided so as to surround the conductive material 82. A harness 84 from the power feeding circuit is connected to the conductive material 82.

The conductive bearing 88 shown in FIG. 26 is arranged so as to be in contact with the outer peripheral surface of the tubular portion 41 or 41A of the film electrode 40 or 40A. A harness 84 is connected to the conductive bearing 88.

The above embodiment is an example of the present invention, and the present invention may be a form other than the above.

1 Webbing 2 Conductive thread 3,3A, 3B, 3C Non-conductive thread 4,4A, 4B, 4C, 4D, 4E Weft thread 10 Seatbelt device 12 Seatbelt 13 Retractor 14 Buckle 15 Tongue 18 Sewing thread 20 Electrical device 25 Belt anchor 30 , 30A Spool 31,31A Body 32,32A Flange 33 Shaft 34 Slit 40,40A Film electrode 47,50,60 Terminal semifield 48 pin 69 Notch 70 terminal 74 pin 80 Jack 88 Conductive bearing

Claims (8)

Woven as warp and weft yarns extend perpendicular to each other, comprise該経yarn conductive yarn and a non conductive yarn, and a seat belt non-conductive yarn is formed using a thick webbing from conductor conductive yarn,
The retractor that winds up the seat belt and
A power feeding means for supplying power to the conductive yarn in the retractor,
Seat belt device with. The seatbelt device according to claim 1, wherein the power feeding means has a thin metal electrode electrically connected to a power source. In the seatbelt device of claim 2, the retractor has a spool for winding the seatbelt.
The spool has a slit through which the base end side of the seat belt is inserted, and a shaft portion that projects outward from the side of the spool.
A seatbelt device characterized in that the thin plate metal electrode has a tubular portion externally fitted to the shaft portion and a lead portion arranged in the slit. The seatbelt device according to claim 3, wherein the conductive thread and the thin metal electrode are conducted by a pin that is pierced by the seatbelt and conducts to the conductive thread. In the seatbelt device of claim 4, a loop portion is formed on the base end side of the seatbelt.
A first terminal semifield having the pin is arranged in the loop portion, a second terminal semifield is arranged outside the loop portion, the pin is pierced through the loop portion, and the second terminal is inserted. Engaged in the semifield,
A seatbelt device characterized in that the second terminal semifield is in contact with a lead portion of the thin metal electrode. In the seatbelt device of claim 4, a notch is provided at the entrance edge of the slit.
A terminal having the pin is arranged at the entrance of the slit.
A loop portion is formed on the base end side of the seat belt, and a stopper rod is inserted into the loop portion.
The loop portion and the terminal are electrically connected to each other.
A seatbelt device characterized in that the pin is pierced through a seatbelt wound on the spool and the pin comes into contact with the conductive thread. The seatbelt device according to any one of claims 3 to 6, wherein the seatbelt device has a jack attached to the cylinder portion of a thin plate metal electrode outerly fitted to the shaft portion. The seatbelt device according to any one of claims 3 to 6, wherein a conductive bearing is mounted on the tubular portion of the thin plate metal electrode outerly fitted to the shaft portion.

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