# Patent

## Title
Saddle-type vehicle

## Abstract

A saddle-type vehicle, such as a motorcycle, equipped with an airbag module and an airbag control unit wherein the motorcycle is not increased in width. The motorcycle includes a body frame extending rearwardly from a head pipe with a rider's seat provided on the body frame and on which a rider or riders are to be seated. The airbag module is provided on the body frame and in which an airbag is accommodated. The airbag control unit is provided for controlling the deployment of the airbag. The airbag module is disposed on the front side of the rider seat with the airbag control unit being disposed between the head pipe and the airbag module.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims priority under 35 USC 119 to Japanese Patent Application No. 2009-109121 filed on Apr. 28, 2009 the entire contents of which are hereby incorporated by reference.
FIELD OF THE INVENTION
The present invention relates to an improvement in a saddle-type vehicle equipped with an airbag apparatus.
DESCRIPTION OF BACKGROUND ART
A saddle-type vehicle is known that is equipped with an airbag apparatus on the front side of a seat. See, for example, Japanese Patent Laid-open No. 2007-69785 (FIG. 8).
In FIG. 8 of Japanese Patent Laid-open No. 2007-69785, a module cover 22 (the same reference symbols as those in the document are used here) for covering the whole width of an airbag module is disposed on the upper side of upper tubes 21L and 21R, and an airbag ECU 35 is disposed outside the module cover 22.
The airbag module and the airbag ECU 35 are so disposed that the whole width of the airbag module and the airbag ECU 35 is accommodated between the upper tubes 21L and 21R.
The spacing between the upper tubes 21L and 21R in Japanese Patent Laid-open No. 2007-69785 is narrowed and the airbag module and the airbag ECU 35 are disposed on the upper side of the upper tubes 21L and 21R.
In this case, since the airbag ECU 35 is disposed outside the airbag module, the airbag ECU 35 may protrude from the upper tube 21L or 21R in the vehicle width direction. However, if the airbag ECU 35 protrudes from the upper tube 21L or 21R, it results in an increase in vehicle width.
SUMMARY AND OBJECTS OF THE INVENTION
It is an object of an embodiment of the present invention is to provide a technology by which it is possible to restrain an increase in vehicle width, in a saddle-type vehicle equipped with an airbag module and an airbag control unit.
According to an embodiment of the present invention, a saddle-type vehicle includes a head pipe for turnably supporting a steering handle with a body frame extending rearwardly from the head pipe. A rider seat is provided on the body frame and on which a rider or riders are to be seated with an airbag module which is provided on the body frame and in which an airbag is accommodated. An airbag control unit is provided for controlling deployment of the airbag. The airbag module is disposed on the front side of the rider seat and the airbag control unit is disposed at a position which is between the head pipe and the airbag module and which is deviated to the left side or right side from a center line passing through the center of vehicle width.
According to an embodiment of the present invention, the airbag control unit is a member having a box-like shape of which the length along the longitudinal direction of the vehicle is greater than the width along the vehicle width direction, and the height along the vehicle height direction is greater than the width along the vehicle width direction.
According to an embodiment of the present invention, the airbag control unit is disposed along a lateral side of a fuel tank disposed on the front side of the airbag module, in plan view of the vehicle.
According to an embodiment of the present invention, the body frame includes a pair of left and right main frames, and the airbag control unit is disposed on the inner side in the vehicle width direction relative to the left and right main frames.
According to an embodiment of the present invention, the airbag module is mounted to a stay extending upwardly from the body frame with an extension part that extends forward from the stay. The airbag control unit is mounted to the extension part.
According to an embodiment of the present invention, wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module with the wiring extending from a front portion of the airbag control unit. The wiring passes on the front side of the airbag module, is passed on a lateral side of the airbag module where the airbag control unit is not disposed, and is passed between the airbag module and the rider seat, to be connected to the airbag module.
According to an embodiment of the present invention, wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module with the wiring extending from a rear portion of the airbag control unit, and is passed between the airbag module and the rider seat, to be connected to the airbag module.
According to an embodiment of the present invention, the fuel tank is disposed in a space ranging from the lower side to the front side of the airbag module, a front portion of the fuel tank forms an oil filler port bulging upwardly on the front side of the airbag module, and the airbag control unit is disposed on a lateral side of the oil filler port.
According to an embodiment of the present invention, the airbag control unit is disposed between the head pipe and the airbag module. Since the airbag control unit is not disposed on a lateral side of the airbag module, an increase in the vehicle width can be restrained. In this case, since the vehicle width is made smaller, gripping of the vehicle body by the rider's knees can be facilitated.
According to an embodiment of the present invention, the airbag control unit is a member having a box-like shape of which the width is smaller than each of the length and the height. Since the airbag control unit of which the width is smaller as compared with the length and the height is disposed along the vehicle width direction, an increase in vehicle width can be restrained.
According to an embodiment of the present invention, the airbag control unit is disposed along a lateral side of the fuel tank disposed on the front side of the airbag module, in plan view of the vehicle. Therefore, an increase in vehicle width due to the arrangement of the airbag control unit can be minimized.
According to an embodiment of the present invention, the airbag control unit is disposed on the inner side in the vehicle width direction relative to the main frames. Therefore, the shape of the cowl for covering the vehicle can be set compact and freely, as compared with the case where the airbag control unit is disposed to exceed the outer width of the main frames.
According to an embodiment of the present invention, an extension part extends forward from the airbag mounting stay, and the airbag control unit is mounted to the extension part. Since the airbag mounting stay is made to function also as a mounting member for mounting the airbag control unit, there is no fear of an increase in the number of component parts.
According to an embodiment of the present invention, the wiring for interconnecting the airbag control unit and the airbag module extends from a front portion of the airbag control unit, is passed on the front side of the airbag module, is passed on a lateral side of the airbag module where the airbag control unit is not disposed, and is passed between the airbag module and the rider seat, to be connected to the airbag module. With such a laying-around of wiring, the worker can easily carry out the wiring work by putting a hand or hands from a lateral side of the airbag module. Consequently, workability related to wiring can be enhanced.
According to an embodiment of the present invention, the wiring for interconnecting the airbag control unit and the airbag module extends from a rear portion of the airbag control unit, to be connected to the airbag module. Therefore, the length of wiring can be shortened.
According to an embodiment of the present invention, the fuel tank is disposed in a space ranging from the lower side to the front side of the airbag module, a front portion of the fuel tank bulges upwardly on the front side of the airbag module to form an oil filler port, and the airbag control unit is disposed on a lateral side of the oil filler port. Consequently, the airbag module, the fuel tank, the oil filler port and the airbag control unit can be disposed in a limited space on the front side of the rider seat, so that effective utilization of space can be achieved. In addition, notwithstanding such a layout, the capacity of the fuel tank is not reduced.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.



BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
FIG. 1 is a left side view of a motorcycle pertaining to the present invention;
FIG. 2 is a left side view of showing a condition where a rider seat and an airbag apparatus are mounted to the motorcycle pertaining to the invention;
FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;
FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;
FIG. 5 is a side view for illustrating the relationship between a seat hook extending from an airbag module pertaining to the invention and the rider seat;
FIG. 6 is a view taken along arrow 6 of FIG. 5;
FIG. 7 is a perspective view for illustrating the relationship between the seat hook extended from the airbag module pertaining to the invention and the rider seat;
FIG. 8 is a perspective view of a cowl mounting stay extending from the airbag module pertaining to the invention;
FIG. 9 is a back view for illustrating that a cowl can be mounted to the cowl mounting stay extending from the airbag module pertaining to the invention;
FIG. 10 is a plan view for illustrating the laying-around of a wiring which interconnects the airbag module pertaining to the invention and an airbag control unit;
FIG. 11 illustrates operation of a motorcycle having an airbag apparatus pertaining to the invention;
FIG. 12 illustrates another embodiment of FIG. 5;
FIG. 13 is a plan view of the seat hook extending from the airbag mounting stay according to the invention;
FIG. 14 is a sectional view taken along line 14-14 of FIG. 13;
FIG. 15 is a perspective view of the seat hook extending from the airbag mounting stay pertaining to the invention; and
FIG. 16 is a view of another embodiment of FIG. 10.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Now, embodiments of the present invention will be described in detail below. In the drawings and the embodiments, the directions “up,” “down,” “front,” “rear,” “left,” and “right” mean those directions as viewed from a driver seated on the motorcycle. In addition, the drawings are to be viewed according to the positioning of reference symbols.
Example 1 of the present invention will be described based on the drawings.
In FIG. 1, a motorcycle 10, as a saddle-type vehicle, has a head pipe 11, and a body frame 12 extending rearwardly from the head pipe 11.
The body frame 12 includes, as major components, a pair of main frames 15L and 15R (only reference symbol 15L on the viewer's side is shown) extending rearwardly from the head pipe 11 which constitutes a front portion of a vehicle body 14, a pair of left and right pivot plates 17L and 17R (only reference symbol 17L on the viewer's side is shown) mounted to rear end portions of the main frames 15L and 15R and having a pivot shaft 16, a pair of left and right seat rails 18L and 18R (only reference symbol 18L on the viewer's side is shown) which rise rearwardly and upwardly from upper portions of the pivot plates 17L and 17R and then extend rearwardly, and a pair of left and right middle frames 19L and 19R (only reference symbol 19L on the viewer's side is shown) which interconnect rear end portions of the seat rails 18L and 18R and intermediate portions of the pivot plates 17L and 17R and support the seat rails 18L and 18R. In short, the seat rails 18L and 18R are included in a rear portion of the body frame 12.
A pair of left and right sub-rails 21L and 21R (only reference 21L on the viewer's side is shown) extend rearwardly from upper end portions of the middle frames 19L and 19R. A pair of left and right seat stays 22L and 22R interconnect rear portions of the sub-rails 21L and 21R and the middle frames 19L and 19R, respectively. A pair of left and right auxiliary stays 23L and 23R (only reference symbol 23L on the viewer's side is shown) extend rearwardly and downwardly from rear portions of the sub-rails 21L and 21R and then extend horizontally toward the front side.
A trunk 27 for accommodating objects therein is mounted to the sub-rails 21L and 21R, and a back rest 28 for holding the rider's back is mounted to a front wall 27a of the trunk 27.
An engine 32 is suspended under the main frames 15L and 15R through fastening members 31a to 31c. The engine 32 is a horizontally opposed six-cylinder water-cooled engine.
A pair of left and right rear swing arms 34L and 34R (only reference symbol 34L on the viewer's side is shown) which can be vertically swung about the pivot shaft 16 are mounted to the pivot plates 17L and 17R. A rear wheel 36 is rotatably mounted to rear end portions of the rear swing arms 34L and 34R through a rear axle 35. The rear wheel 36 is driven by a chain 42 which is wrapped around a drive sprocket 38 attached to a drive shaft 37 of the engine 32 and a driven sprocket 41 formed to be integral with the rear wheel 36.
A rear shock absorber 48 is risingly mounted to intermediate portions of the rear swing arms 34L and 34R through a link mechanism 47. An upper end portion of the rear shock absorber 48 is mounted to a bracket 49 formed on the side of the main frames 15L and 15R.
A front fork 52 is steerably mounted to the head pipe 11. A front wheel 54 is mounted to the front fork 52 through a front axle 53. A steering handle 55 is attached to an upper end portion of the front fork 52. The head pipe 11 is a member for turnably supporting the steering handle 55.
An opening part 57 is formed on a lateral side of front portions of the main frames 15L and 15R and on a lateral side of a main cowl 56. A radiator unit 58 for cooling the engine 32 is disposed so as to face the opening part 57.
In FIG. 1, a front disk brake unit 61 is provided together with a front disk plate 62, a front cowl 63 for covering the front side of the vehicle, a front shield 64, a front fender 66, a pair of left and right main stand brackets 68L and 68R (only reference symbol 68L on the viewer's side is shown), a battery 67 disposed under a rider seat 71, a main stand 69, and a meter or meters 70.
The rider seat 71 on which the riders are to be seated is provided on the seat rails 18L and 18R. The rider seat 71 has a structure in which a resin-made front seat 72 permits the rider to be seated thereon and a rear seat 73 provided in continuity with a rear portion of the front seat 72 are integrally disposed on the upper side of a seat bottom plate.
In FIG. 2, of the rider seat 71 on which the riders are to be seated, a rear end portion of the seat bottom plate is attached to the seat rails 18L and 18R through pairs of left and right fastening bolts 75L, 75R, 76L and 76R.
An airbag module 82 is mounted to the main frames 15L and 15R through an airbag mounting stay 81. A seat hook 84 for holding a front end portion 83 of the bottom plate of the rider seat 71 extends rearwardly from the airbag module 82. In other words, the airbag module 82 is fixed to the airbag mounting stay 81 provided as a stay extending upwardly from the body frame 12.
The airbag module 82 is one of components of an airbag apparatus 86. The airbag apparatus 86 includes, as major components, the airbag module 82, and an airbag control unit 87 for controlling the deployment of an airbag (reference symbol 101 in FIG. 4, described later) which is accommodated in the airbag module 82.
Summing up the foregoing, the rider seat 71 is mounted on and attached to the seat rails 18L and 18R in the condition in which the front end portion 83 of the seat bottom plate is upwardly inclined toward the front side of the vehicle. The airbag module 82 is disposed on the front side of the rider seat 71.
Referring to FIG. 1, left and right first sensors 77, 77 (only reference symbol 77 on the viewer's side is shown) and left and right second sensors 78, 78 (only reference symbol 78 on the viewer's side is shown) for detecting an impact on the vehicle body 14 are disposed respectively at an upper portion and a lower portion of the front fork 52. First cables 79, 79 (only reference symbol 79 on the viewer's side is shown) extend from the upper and lower sensors 77, 77, 78, 78, and are passed on the upper side of the engine 32, to be connected to the airbag control unit 87. The meter or meters 70 include an indicator 80 for displaying whether the airbag apparatus 86 is in a normal state or an abnormal state. A second cable 85 extends from the indicator 80, and is connected to the airbag control unit 87. In addition, a third cable 88 extends from a battery 67, and is passed on the lower side of the rider seat 71, to be connected to the airbag control unit 87.
In FIG. 3, an air cleaner unit 92 with an element 91 incorporated therein is disposed between the left and right main frames 15L and 15R, and a fuel tank 93 is disposed on the upper side of the air cleaner unit 92. The airbag control unit 87 is disposed on the left side of the fuel tank 93 and on the inner side in the vehicle width direction relative to the overall width (Y) of the left and right main frames 15L and 15R. In FIG. 3, an oil filler cap 94 is provided which openably covers an oil filler port 90 provided at an upper front portion of the fuel tank 93.
Since the airbag control unit 87 is disposed along a lateral side of the fuel tank 93, the increase in the vehicle width due to the arrangement of the airbag control unit 87 can be minimized.
In addition, since the airbag control unit 87 is disposed on the inner side in the vehicle width direction relative to the left and right main frames 15L and 15R, the shape of the cowl (reference symbol 106 in FIG. 9, described later) can be set compact and freely, as compared with the case where the airbag control unit 87 is disposed to exceed the outer width of the main frames 15L and 15R.
In FIG. 4, the fuel tank 93 is disposed between the left and right main frames 15L and 15R. Left and right inflators 95 and 96 for generating a gas for inflating the airbag 101 and the airbag module 82 accommodating the airbag 101 therein are disposed on the upper side of the fuel tank 93. In short, the airbag module 82 accommodates the airbag 101 therein.
The airbag module 82 has a holding box 98 as a casing. The holding box 98 is composed of a bottom plate 102, side plates 105 provided erectly on the bottom plate 102, and a lid 104 for covering the upper side of the side plates 105.
The bottom plate 102 of the holding box 98 is provided with opening parts 100L and 100R, and the inflators 95 and 96 arranged in parallel on the left and right sides are provided so as to penetrate the opening parts 100L and 100R, respectively.
In addition, while the two inflators 95 and 96 are arranged in parallel on the left and right sides, the number of the inflators may be arbitrary, and the inflators may be arranged in parallel on the front and rear sides. Thus, the arrangement of the inflators is not limited to the form of layout according to this embodiment.
Now, the layout of the airbag control unit 87 will be described below.
In FIGS. 2 to 4, the airbag module 82 is disposed on the front side of the rider seat 71, and the airbag control unit 87 is disposed at a position which is between the head pipe 11 and the airbag module 82 and which is deviated to the left side from the center line passing through the center of the vehicle width.
In addition, the airbag control unit may be disposed at a position deviated to the right side from the center line passing through the center of the vehicle width.
The airbag control unit 87 is a member having a box-like shape of which the length (L) along the longitudinal direction of the vehicle is greater than the width (W) along the vehicle width direction, and the height (T) along the vehicle height direction is greater than the width (W) along the vehicle width direction.
Thus, the airbag control unit 87 is a box-like member having a width (W) which is smaller than each of the length (L) and the height (T). Since the airbag control unit 87 having the width (W) smaller than each of the length (L) and the height (T) is disposed along the vehicle width direction, an increase of the vehicle size in the vehicle width direction can be restrained.
Now, layout of the fuel tank will be described below.
The fuel tank 93 is disposed in a space ranging from the lower side of the airbag module 82 to the lower side of the front end portion 83 of the rider seat 71. Such a layout of the fuel tank 93 ensures that the airbag module 82 and the rider seat 71 can be supported, even in the case where other members than the body frame 12 is disposed on the lower side of the airbag module 82 and the lower side of the rider seat 71.
In FIGS. 5 to 8, the airbag module 82 has the holding box 98 accommodating the inflators 95 and 96 therein. A lid 104 as a cover having a fragile portion (not shown) at part thereof so that the airbag (reference symbol 101 in FIG. 4) can be inflated and deployed is provided at an upper portion of the holding box 98. The seat hook 84 for holding the front end portion 83 of the rider seat 71 extends rearwardly from the holding box 98. Separately from the seat hook 84, cowl mounting stays 107L and 107R to which a cowl 106 for covering the body frame 12 is to be mounted extend rearwardly from the holding box 98. Weld nuts 108, 108 are provided for mounting the cowl 106 together with fastening members 109 . . . (. . . indicates plurality, here and hereafter) for fixing the airbag module 82 to the airbag mounting stay 81. Screw members 110, 110 are provided for mounting the cowl 106.
The seat hook 84 has a U-shaped part 112 which is substantially U-shaped in plan view. When a holding piece 113 that extends downwardly from the front end portion 83 of the rider seat bottom plate and then extends rearwardly is hooked on the U-shaped part 112 from above, the front end portion 83 of the rider seat bottom plate is held onto the seat hook 84.
Further, the holding box 98 of the airbag module 82 is provided with a pipe support part 116. Since the pipe support part 116 is thus provided, not only the rider seat 71 but also a fuel pipe 118 can be mounted to the airbag module 82.
In addition, the pipe support part is not limited to the one for supporting the fuel pipe; for example, the pipe support part may be one for supporting cables such as harnesses.
Since the airbag module 82 is provided with the seat hook 84, the cowl mounting stays 107L and 107R, and the pipe support part 116, it is possible to reduce the number of component parts and to make the vehicle body simple in structure.
In addition, the pipe support part 116 may be provided in the airbag mounting stay 81.
Referring to FIG. 2, an extension stay 131 as an extension part extends forward from the airbag mounting stay 81, and the airbag control unit 87 is mounted to the extension stay 131 by the fastening members 132, 132. Since the extension stay 131 functioning also as a mounting member for the airbag control unit 87 extends from the airbag mounting stay 81, there is no fear that the number of component parts would be increased.
In FIGS. 8 and 9, on the left and right outer sides of the seat hook 84 for supporting the front end portion 83 of the rider seat bottom plate, the cowl mounting stays 107L and 107R extend rearwardly from the airbag module 82. With the structure in which the rider seat 71 can be held by the seat hook 84 and the cowl 106 can be mounted by the cowl mounting stays 107L and 107R, it is possible to restrain an increase in the number of component parts. With an increase in the number of component parts thus restrained, the vehicle body can be simplified in structure.
Summing up the foregoing, the airbag module 82 is provided with the cowl mounting stays 107L and 107R for the cowl 106 for covering the body frame 12, so that not only the rider seat 71 but also the cowl 106 can be mounted. Accordingly, the number of component parts can be reduced, and the vehicle body can be simplified in structure.
In addition, the airbag mounting stay 81 may be provided with the cowl mounting stays 107L and 107R. Further, both the airbag module 82 and the airbag mounting stay 81 may be provided with the cowl mounting stays 107L, 107R.
In FIG. 10, wiring 122 for transmitting a deployment control signal for the airbag 101 is provided between the airbag control unit 87 and the airbag module 82. The wiring 122 extends from a front portion 135 of the airbag control unit 87, is passed on the front side of the airbag module 82, and is passed on the outer side of a right side surface 136 of the airbag module 82 on which the airbag control unit 87 is not disposed. The wiring 122 is then passed between the airbag module 82 and the rider seat 71, to be connected to the airbag module 82. More specifically, the wiring 122 is provided with a wiring connector part 134 at a leading end portion thereof, and the wiring connector part 134 is connected to a connector part 124 on the module side.
Thus, the airbag apparatus 86 has the airbag control unit 87 for controlling the deployment of the airbag 101. The wiring 122 for transmitting the deployment control signal for the airbag 101 is provided between the airbag control unit 87 and the inflators 95, 96.
The wiring 122 for interconnecting the airbag control unit 87 and the airbag module 82 extends from the front portion 135 of the airbag control unit 87, and is passed on a lateral side of the airbag module 82, to be connected to the airbag module 82. According to such a laying of wiring, a worker can easily carry out wiring works by putting a hand or hands into a required site from a lateral side of the airbag module 82. Accordingly, workability relating to wiring can be enhanced.
Now, the operation of the above-mentioned saddle-type vehicle will be described below.
In FIG. 11, the airbag control unit 87 is disposed between the head pipe 11 and the airbag module 82 in side view of the vehicle.
If the airbag control unit 87 is disposed, for example, on the left side of the airbag module 82 in the case where the space between the left and right main frames 15L and 15R is set to be narrow, there is a possibility that the airbag control unit 87 may protrude to the outside of the left main frame 15L, resulting in an enlargement of the vehicle width.
In this connection, according to the present invention, the airbag control unit 87 is disposed between the head pipe 11 and the airbag module 82.
Where the airbag control unit 87 is thus disposed between the head pipe 11 and the airbag module 82, the vehicle width can be restrained from being enlarged. In this case, the lateral side of the air bag module 82 and the lateral side of the airbag control unit 87 are both in an area 160 of contact by the knee K of the driver D. With the vehicle width restrained from being enlarged in this area 160, gripping of the vehicle body by the knees K of the driver D can be performed easily.
In FIG. 11, rider steps 161, 161 (only reference symbol 161 on the viewer's side is shown) are provided at lower portions of the pivot plates 17L and 17R and on which the feet of the driver D are positioned.
Referring to FIGS. 2 to 4 as well, the upper surface of the fuel tank 93 is formed so as to be located above the pair of left and right main frames 15L and 15R. The airbag mounting stay 81 extends from the left and right main frames 15L and 15R to above the upper surface of the fuel tank 93. With such an airbag mounting stay 81, it is possible to dispose the airbag module 82 at an optimum position, for example, to dispose the airbag module 82 close to the rider.
In addition to this, the fuel tank 93 is disposed in a space ranging from the lower side to the front side of the airbag module 82; a front portion of the fuel tank 93 bulges to the upper side on the front side of the airbag module 82 and is provided with an oil filler port 90; and the airbag control unit 87 is disposed on a lateral side of the oil filler port 90. Consequently, the airbag module 82, the fuel tank 93, the oil filler port 90 and the airbag control unit 87 can be disposed in a limited space on the front side of the rider seat 71, so that effective utilization of space is achieved. In addition, even with such a layout, a reduction in the capacity of the fuel tank 93 can be obviated.
Now, Example 2 of the present invention will be described below, based on the drawings.
In FIGS. 12 and 13, a seat hook arm 141 substantially U-shaped in plan view extends from an airbag mounting stay 81B provided as a stay for mounting an airbag module 82 to main frames 15L and 15R. A seat hook 144 which is substantially C-shaped in plan view and which holds a front end portion 83 of a rider seat bottom plate is mounted to extend from a transverse arm part 142 of the seat hook arm 141. In addition, the seat hook arm 141 is mounted to the airbag mounting stay 81B by bolts 155 . . . .
In the FIGS. 12 and 13, bolts 148 . . . are provided for firmly attaching the airbag mounting stay 81 to the main frames 15L, 15R. In addition, the airbag mounting stay 81B may be attached to the main frames 15L, 15R by welding.
In FIG. 14, the airbag mounting stay 81B is composed of a combination of left and right longitudinal plates 151, 151, which are angular U-shaped in section, with a transverse plate 154 provided bridgingly between upper end portions of the left and right longitudinal plates 151, 151. The seat hook arm 141 is mounted on the overlapping portions of the longitudinal plates 151, 151 and the transverse plate 154, and they are mounted by co-fastening by means of bolts 155 . . . and nuts 156 . . . .
In FIG. 15, a seat hook 144 for holding a front end portion 83 of a rider seat bottom plate extends from the airbag mounting stay 81B. Since the rider seat 71 can be held by the airbag mounting stay 81B, an increase in the number of component parts can be restrained. With an increase in the number of component parts thus restrained, the vehicle body can be simplified in structure.
In FIG. 16, a wiring 122B for transmitting a deployment control signal for an airbag (reference symbol 101 in FIG. 4) is provided between an airbag control unit 87 and the airbag module 82. The wiring 122B extends from a rear portion 137 of the airbag control unit 87, and is passed between the airbag module 82 and the rider seat 71, to be connected to the airbag module 82.
Since the wiring 122B for interconnecting the airbag control unit 87 and the airbag module 82 extends from the rear portion 137 of the airbag control unit 87 and is connected to the airbag module 82, the wiring 122B can be laid to extend to the airbag module 82 through a shortest distance.
In addition, while the present invention is applied to a saddle-type vehicle in the embodiments above, the invention can be applied also to three-wheel vehicles, and may be applied to general vehicles.
The present invention is preferable for application to a motorcycle equipped with an airbag apparatus.
The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

## Claims

1. A vehicle, comprising:
a head pipe for turnably supporting a steering handle;
a body frame extends rearwardly from the head pipe;
a rider seat is provided on the body frame wherein a rider or riders are seated thereon;
an airbag module provided on the body frame and in which an airbag is accommodated; and
an airbag control unit controls deployment of the airbag;
wherein the airbag module is disposed on the front side of the rider seat and provided on the body frame; and
the airbag control unit is disposed at a position which is between the head pipe and the airbag module and which is deviated to the left side or right side from a center line passing through the center of vehicle width.

2. The vehicle according to claim 1, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a front portion of the airbag control unit, is passed on the front side of the airbag module, is passed on a lateral side of the airbag module where the airbag control unit is not disposed, and is passed between the airbag module and the rider seat, to be connected to the airbag module.

3. The vehicle according to claim 1, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a rear portion of the airbag control unit, and is passed between the airbag module and the rider seat, to be connected to the airbag module.

4. The vehicle according to claim 1, wherein the airbag control unit is a member having a box-like shape of which the length along the longitudinal direction of the vehicle is greater than the width along the vehicle width direction, and the height along the vehicle height direction is greater than the width along the vehicle width direction.

5. The vehicle according to claim 4, wherein the body frame includes a pair of left and right main frames; and
the airbag control unit is disposed on the inner side in the vehicle width direction relative to the left and right main frames.

6. The vehicle according to claim 4, wherein the airbag module is mounted to a stay extending upwardly from the body frame, an extension part extends forward from the stay, and the airbag control unit is mounted to the extension part.

7. The vehicle according to claim 4, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a front portion of the airbag control unit, is passed on the front side of the airbag module, is passed on a lateral side of the airbag module where the airbag control unit is not disposed, and is passed between the airbag module and the rider seat, to be connected to the airbag module.

8. The vehicle according to claim 4, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a rear portion of the airbag control unit, and is passed between the airbag module and the rider seat, to be connected to the airbag module.

9. The vehicle according to claim 4, wherein the airbag control unit is disposed along a lateral side of a fuel tank disposed on the front side of the airbag module, in plan view of the vehicle.

10. The vehicle according to claim 9, wherein the body frame includes a pair of left and right main frames; and
the airbag control unit is disposed on the inner side in the vehicle width direction relative to the left and right main frames.

11. The vehicle according to claim 9, wherein the airbag module is mounted to a stay extending upwardly from the body frame, an extension part extends forward from the stay, and the airbag control unit is mounted to the extension part.

12. The vehicle according to claim 9, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a front portion of the airbag control unit, is passed on the front side of the airbag module, is passed on a lateral side of the airbag module where the airbag control unit is not disposed, and is passed between the airbag module and the rider seat, to be connected to the airbag module.

13. The vehicle according to claim 9, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a rear portion of the airbag control unit, and is passed between the airbag module and the rider seat, to be connected to the airbag module.

14. The vehicle according to claim 9, wherein the fuel tank is disposed in a space ranging from the lower side to the front side of the airbag module, a front portion of the fuel tank forms an oil filler port bulging upwardly on the front side of the airbag module, and the airbag control unit is disposed on a lateral side of the oil filler port.

15. The vehicle according to claim 1, wherein the body frame includes a pair of left and right main frames; and
the airbag control unit is disposed on the inner side in the vehicle width direction relative to the left and right main frames.

16. The vehicle according to claim 15, wherein the airbag module is mounted to a stay extending upwardly from the body frame, an extension part extends forward from the stay, and the airbag control unit is mounted to the extension part.

17. The vehicle according to claim 15, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a front portion of the airbag control unit, is passed on the front side of the airbag module, is passed on a lateral side of the airbag module where the airbag control unit is not disposed, and is passed between the airbag module and the rider seat, to be connected to the airbag module.

18. The vehicle according to claim 15, wherein the fuel tank is disposed in a space ranging from the lower side to the front side of the airbag module, a front portion of the fuel tank forms an oil filler port bulging upwardly on the front side of the airbag module, and the airbag control unit is disposed on a lateral side of the oil filler port.

19. The vehicle according to claim 1, wherein the airbag module is mounted to a stay extending upwardly from the body frame, an extension part extends forward from the stay, and the airbag control unit is mounted to the extension part.

20. The vehicle according to claim 19, wherein wiring for transmitting a deployment control signal for the airbag is provided between the airbag control unit and the airbag module; and
the wiring extends from a front portion of the airbag control unit, is passed on the front side of the airbag module, is passed on a lateral side of the airbag module where the airbag control unit is not disposed, and is passed between the airbag module and the rider seat, to be connected to the airbag module.