Four-wheeled all-terrain vehicle having an accessory socket

In a four-wheeled all-terrain vehicle, a handlebar bracket is attached to the upper end of a steering shaft, a handlebar has a central part fastened to the handlebar bracket with clamping members, a bracket is attached to the clamping member, and a handlebar cover is fixedly attached to the bracket so as to cover the central part of the handlebar from above. An accessory socket is disposed inside the handlebar cover and is held on the bracket. An accessory plug electrically connected to an external electric apparatus can be inserted inside the handlebar cover through a recess formed in a side wall of the handlebar cover and can be connected to the accessory socket. A battery is electrically connected to the accessory socket.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a four-wheeled all-terrain vehicle 
(hereinafter abbreviated to "ATV") provided with a power supply circuit 
capable of supplying a dc current from a battery to an external electric 
apparatus. 
2. Description of the Related Art 
The ATV is capable of traveling rough terrains including sandy places, 
rugged lands, rocky mountains and rough lands with muddy puddles. The ATV 
is provided with a battery for supplying a dc current to a self-starting 
motor when starting the engine and to a headlight. The battery is used 
also for supplying a dc current to a dc external electric apparatus, such 
as a portable lamp, a radio set or an electric winch. 
FIG. 10 is a perspective view of a conventional ATV 101, and FIG. 11 is a 
perspective view of a dc power supply circuit arranged on the ATV 101 to 
supply power to an external electric apparatus. In FIG. 11, a portable 
lamp 170 is shown as an example of the external electric apparatus. The 
ATV 101 is provided with a battery. A wiring harness 163 has a first end 
connected to the battery, and a second end contained in a front handlebar 
cover 191 disposed above a front fender B1' and on the front side of a 
handlebar H' when the same is not used so as to be pulled out of the front 
handlebar cover 191 when the same is used for supplying power to an 
external electric apparatus. Another wiring harness 164 for supplying 
power to an external electric apparatus is stored under a seat S'. An 
extension wiring harness 165 is connected to the harness 164 to supply 
power to an external electric apparatus behind the ATV 101. Referring to 
FIG. 11, two insulated wires 164a and 164b extending from the second end 
of the wiring harness 163 are connected to terminals 165a and 165b 
connected to the wires 181a and 181b of a conversion cable 180, 
respectively. The portable lamp 170 has a power cord 171, and the free end 
of the power cord 171 is connected to an accessory plug 172. The accessory 
plug 172 cannot directly be connected to the terminals 165a and 165b; the 
same is connected through the conversion cable 180 to the terminals 165a 
and 165b. The conversion cable 180 has wires 181a and 181b. Each of the 
wires 181a and 181b has one end connected to a terminal of an accessory 
socket 182 capable of being electrically connected to the accessory plug 
172. The other ends of the wires 181a and 181b of the conversion cable 180 
are connected to terminals 183a and 183b, respectively. The accessory plug 
172 and the accessory socket 182, the terminals 165a and 183a, and the 
terminals 165b and 183b are connected to supply dc power from the battery 
to the portable lamp 170. 
The conversion cable 180 is necessary for supplying power from the battery 
to an external electric apparatus. Connection of an external electric 
apparatus to the battery requires troublesome work for pulling out the 
terminals 165a and 165b connected to the insulated wires 164a and 164b of 
the wiring harness 163 out of the front handlebar cover 191 and for 
connecting the conversion cable 180 to the wiring harness 163. Although 
the terminals 165a and 165b to which the terminals 183a and 183b of the 
conversion cable 180 are to be connected are protected by an insulator 
195, the insulator 195 is not satisfactorily waterproof because it, is 
placed outside the front handlebar cover 191. Since many wiring harnesses 
(not shown) are extended inside the front handlebar cover 191, it is 
troublesome to discriminate the wiring harness 163 from the rest of the 
wiring harnesses. The wiring harness 163 pulled out of the front handlebar 
cover 191 spoils the appearance of the ATV 101. 
SUMMARY OF THE INVENTION 
Accordingly, it is an object of the present invention to provide an ATV 
provided with an accessory socket for a dc apparatus, not requiring any 
conversion cable for connecting the accessory socket to an external 
electric apparatus, facilitating the connection of an external electric 
apparatus thereto, and capable of protecting an electrical connection and 
of avoiding spoiling the appearance of the ATV when an external electric 
apparatus is connected thereto. 
According to one aspect of the present invention, an ATV comprises: a 
steering shaft having an upper end; a handlebar bracket attached to the 
upper end of the steering shaft; a handlebar having a central part 
fastened to the handlebar bracket; a handlebar cover fixedly disposed so 
as to cover the central part of the handlebar from above and having a side 
wall provided with a recess; an accessory socket disposed inside the 
handlebar cover and capable of being connected to an accessory plug 
electrically connected to an external electric apparatus and inserted 
inside the handlebar cover through the recess of the handlebar cover; and 
a battery electrically connected to the accessory socket. 
The power supply cable of an external electric apparatus can easily be 
connected to the accessory socket. Since the accessory socket is disposed 
inside the handlebar cover, the accessory socket and electrical contacts 
associated with the accessory socket are protected and the accessory 
socket does not spoil the appearance of the ATV. 
Preferably, insulated wires connected to the accessory socket are connected 
to those connected to the battery in a space covered with the handlebar 
cover and the insulated wires connected to the battery are extended along 
the steering shaft. Thus, the connections between the insulated wires and 
the accessory socket are protected by the handlebar cover. 
The construction of fixing the accessory socket to the ATV can be embodied 
in various ways. Preferably, the handlebar is fastened to the handlebar 
bracket with clamping members, a bracket is fixed to the clamping member, 
and the accessory socket is fixedly inserted in a hole formed in the 
bracket. Thus, the accessory socket can be attached to the ATV with a 
simple construction. 
Preferably, the handlebar cover is detachably attached to the brackets to 
facilitate work for the maintenance of the accessory socket and the 
associated parts. 
Preferably, an open end of the accessory socket to be engaged with the 
accessory plug is covered with a detachable cap. When any external 
electric apparatus is not connected to the accessory socket, the open end 
of the accessory socket can be covered with the cap to protect the 
interior of the accessory socket with a simple operation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
FIG. 1 is a plan view of a four-wheeled ATV 1 in a preferred embodiment 
according to the present invention, FIG. 2 is a side view of the ATV 1 of 
FIG. 1, and FIG. 3 is a perspective view of a body frame F included in the 
ATV 1 of FIG. 1. Referring to FIGS. 1 and 2, a driving system including an 
engine E, a transmission (not shown) and such, a battery 62 (FIG. 8), a 
fuel tank T and a seat S are mounted on the body frame F, wheels W are 
suspended from the body frame F, and a handlebar H is supported on the 
body frame F. The front wheels W are covered with a front fender B1, and 
the rear wheels W are covered with a rear fender B2. Baggage carriers C 
are disposed over the fenders B1 and B2, respectively. As shown in FIG. 3, 
an upper bracket 11 is fixed to an upper part of a front section of the 
body frame F, and an upper bearing unit 12 is fixed to the upper bracket 
11. A lower bracket 21 is fixed to members of the body frame F in a lower 
section of the body frame F, and a lower bearing unit 22 is fixed to the 
lower bracket 21. A steering shaft 30 is supported for rotation on the 
body frame F by the upper bearing unit 12 and the lower bearing unit 22. A 
handlebar bracket 31 is fixed to the upper end of the steering shaft 30. 
The steering shaft 30 is connected by linkages (not shown) to front wheel 
support mechanisms to change the direction of the front wheels W for 
steering. 
Referring to FIGS. 4 and 5, a handlebar H has a central part fastened to 
the handlebar bracket 31 with two clamping members 32. Brackets 33 and 34 
are placed on the clamping members 32, respectively, and bolts 35 are 
inserted through holes 33a and 34a formed in the brackets 33 and 34 in 
holes 32a formed in the clamping members 32 and screwed in threaded holes 
formed in the handlebar bracket 31 to clamp the handlebar H between the 
clamping members 32 and the handlebar bracket 31 and to fasten the 
brackets 33 and 34 to the clamping members 32. Grips G are attached to the 
right and the left end part of the handlebar H. The right grip G serves as 
a throttle grip. The right grip G is turned to control the operating speed 
of the engine E. 
The bracket 34 on the left side has a horizontal part 34c and a vertical 
part 34d formed integrally with the horizontal part 34c and extending 
vertically downward from the horizontal part 34c. A hole 34e is formed in 
the vertical part 34d. A single-hole accessory socket 40 having a 
substantially cylindrical shape and provided with an external screw thread 
41 is inserted in the hole 34e of the bracket 34, and is fastened to the 
bracket 34 with a nut 50 screwed on the external screw thread 41 of the 
accessory socket 40. Insulated wires 42a and 42b are extended from the 
accessory socket 40, and terminals 43a and 43b are attached to the free 
ends of the insulated wires 42a and 42b, respectively. The accessory 
socket 40 is covered with a handlebar cover 37 as shown in FIG. 5. The 
terminals 43a and 43b are covered with insulators 95. 
A wiring harness 63 is bound to the steering shaft 30 with binders 66. The 
wiring harness 63 has two insulted wires 64a and 64b covered with a 
sheath. An end part of the sheath is removed to expose the insulted wires 
64a and 64b, and terminals 65a and 65b are attached to the free ends of 
the insulated wires 64a and 64b, respectively. The wiring harness 63 is 
connected to the battery 62 of the ATV 1. 
The central part of the handlebar H is covered from above with the 
handlebar cover 37. Screws are screwed through holes 37e formed in the 
handlebar cover 37 in threaded holes 33b and 34b formed in the brackets 33 
and 34 to fasten the handlebar cover 37 to the brackets 33 and 34. The 
handlebar cover 37 is provided with an opening 37b for a speedometer, an 
opening 37c for shift indicator lamps, and openings 37d through which 
wires including a brake wire are extended. The left side wall of the 
handlebar cover 37 is provided with a recess 37a to expose the front 
surface of the accessory socket 40, i.e., a surface to be joined to an 
accessory plug. The accessory socket 40 is provided with a rubber cap 44. 
When the accessory socket 40 is not in use, the front surface of the 
accessory socket 40 is covered with the rubber cap 44 to protect the 
interior of the accessory socket 40 from dust and moisture. It is known 
from FIG. 6 that the front surface of the accessory socket 40 is exposed 
through the recess 37a of the handlebar cover 37. Referring to FIG. 7, the 
rubber cap 44 is removed from the front surface of the accessory socket 
40. The rubber cap 44 is set at a position indicated by alternate long and 
taco short dashes lines in FIG. 7 to cover the front surface of the 
accessory socket 40. The accessory socket 40 is internally provided with 
two electrodes 45 and 46. The inner ends of the insulated wires 42a and 
42b are connected to the electrodes 45 and 46, respectively, and the 
insulated wires 45 and 46 extends outside from the accessory socket 40. 
FIG. 8 shows an electric circuit including a generator 61 driven by the 
engine E, the battery 62 and the accessory socket 40. The operating speed 
of the engine E is controlled by turning the right grip G. The output of 
the generator 61 varies according to the operating speed of the engine E. 
Power generated by the generator 61 is converted into dc power by a 
rectifier, the voltage of the dc power is regulated by a voltage regulator 
to supply dc power of a desired voltage to the battery 62 to charge the 
battery 62. Power is supplied from the battery 62 to a self-starting motor 
when starting the engine, and headlights when necessary. In FIG. 8, the 
self-starting motor, the headlights and wiring connecting the battery to 
the electrical equipment are omitted. Ends of the insulated wires 64a and 
64b extending from one end of the wiring harness 63 are connected to the 
terminals of the battery 62, and the terminals 65a and 65b attached to the 
other ends of the insulated wires 64a and 64b are coupled with the 
terminals 43a and 43b, respectively, of the accessory socket 40. 
As shown in FIG. 5, the terminals 43a, 43b, 65a and 65b are covered with 
the handlebar cover 37, so that the terminals 43a, 43b, 65a and 65b can be 
protected from mud and water splashed by the ATV 1 while the ATV travels a 
muddy road, and from rain on rainy days by the handlebar cover 37. Since 
the accessory socket 40 is disposed on substantially the same relatively 
high level as the handlebar H, the accessory socket 40 is safe from being 
splashed with mud and water. Since the accessory socket 40 is disposed 
near the handlebar H, the driver straddled on the seat is able to connect 
an external electric apparatus to the accessory socket 40 without leaving 
the seat. The accessory socket 40, the insulated wires 42a and 42b, and 
the terminals 43a and 43b are concealed from view, and the wiring harness 
63 need not be pulled out of the handlebar cover 37 when using the 
accessory socket 40. Accordingly, the appearance of the ATV 1 will not be 
spoiled by the accessory socket 40. The handlebar cover 37 can readily be 
removed from the brackets 33 and 34 simply by removing the two screws 36 
to expose the accessory socket 40, the terminals 43a and 43b, and the 
terminals 65a and 65b of the wiring harness 63, which facilitates 
maintenance work. 
Referring to FIG. 9, when connecting a portable lamp 70, i.e., an external 
electric apparatus, to the accessory socket 40, the cap 44 is removed from 
the front surface of the accessory socket 40, an accessory plug 72 
connected to the free end of a power supply cord 71 connected to the 
portable lamp 70 is plugged in the accessory socket 40 to supply de power 
to the portable lamp 70. 
Although the invention has been described in its preferred embodiment with 
a certain degree of particularity, obviously many changes and variations 
are possible therein. It is therefore to be understood that the present 
invention may be practiced otherwise than as specifically described herein 
without departing the scope and spirit thereof.