JPS6232924Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for energizing a small electric device in a wheel pad of a steering wheel.

In recent automobiles, particularly passenger cars, in order to improve the operability of small electrical devices such as switches, these have come to be concentrated near the steering wheel. In order to enable the driver to operate the steering wheel while visually confirming the operation, the wheel pads are supported so that the wheel pads only make translational movements and maintain the same orientation toward the driver despite rotation of the steering wheel. Various attempts have been made to provide switches. In this case, a problem arises in that the connecting wires must be led out from the switches of the wheel pad, which is a movable part, to the outside of the steering wheel.

The object of the present invention is to enable the flexible connecting wire to be directly led out of the steering wheel from the switches on the wheel pad without using a slip ring or a brush that conductively contacts the slip ring.

Therefore, according to the present invention, a fixed cylindrical body is provided at the center of the steering wheel concentrically with respect to the steering main shaft connected thereto,
A movable cylindrical body with the same diameter that is rotatably supported eccentrically on the boss of the steering wheel and that can revolve around a fixed cylindrical body without rotating on its own axis is provided, and a small size on the wheel pad that is supported so as not to rotate with respect to the steering wheel is provided. The flexible connecting conductor of the electrical equipment is wound around the movable cylinder several times, and then wound around the fixed cylinder several times in the same direction and led out of the steering wheel.

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, the rim 2 of the steering wheel 1 is connected to the boss 4 through spokes 3.
is combined with This boss 4 is connected to a steering main shaft 6 through a sleeve 5 fixed to the boss 4 at the center of the wheel so as not to rotate relative to each other. The main shaft 6 is rotatably supported via a bearing 8 by a cylindrical support member 7 that concentrically surrounds the main shaft and is fixed to the vehicle body.

A support sleeve 11 is fixedly and eccentrically attached to the boss 4, and a switch 13 is mounted on the end surface on the driver's side through a bearing bush 12 inside the sleeve 11.
A rotating shaft 15 attached to a wheel pad 14 having a diameter is rotatably supported. This rotating shaft 1
A belt pulley 16 is attached to 5 and is transmission-coupled via a belt 18 to a fixed belt pulley 17 of the same diameter which is attached to the cylindrical support member 7 and also surrounds the main shaft 6. A flexible connecting conductor 19 to the switches 13 passes through the rotating shaft 15, is wound into a coil shape multiple times around a movable cylinder body 20 coaxially attached to the belt pulley 16, and then is connected to the belt pulley 18 integrally. After being wound into a coil shape multiple times in the same direction around a fixed cylinder 21 having the same diameter, the coil is led out to a required location on the vehicle body.

Now, when the steering wheel 1 is turned for steering, the pad 14 rotates on its own axis due to the transmission coupling between the belt pulley 16 on the rotating shaft 15 and the fixed belt pulley 17 at the center. It attempts to revolve around the main shaft 6 on a circle A whose radius is the eccentric distance, but since both belt pulleys 16 and 17 have the same diameter, the belt pulley 16 and the wheel pad 14
As shown in FIG. 2, the switches 13 do not rotate but only revolve, that is, translate, so the switches 13 always face the same direction with respect to the driver.

In this case, when the movable cylindrical body 20 revolves around the fixed cylindrical body 21 from the position indicated by the solid line to the position indicated by the chain line as shown in FIG. Since the connecting conductor 19 is unwound from the fixed cylinder 21 by the amount of winding, no matter what angle the movable cylinder 20 revolves around the fixed cylinder 21, the connecting conductor 19 is unwound by the amount of winding. Since the amount of return is equal, stress in the longitudinal direction is not applied to the connecting conductor 19, and a good current carrying function is always maintained. It goes without saying that the number of turns of the connecting conductive wire in both the cylinders 20 and 21 is determined by considering the number of revolutions of the movable cylinder 20.

It is also possible to use chain wheels having the same diameter instead of the belts 16 and 17, and to connect the two chain wheels through a chain instead of the belt 18. In this case, there is no slippage between the chain and the chain wheel, so that the transmission connection is reliable. Further, as shown in FIG. 4, gears 23 and 24 of the same diameter are used instead of the belt wheels 16 and 17, and these are connected to an idler gear 2 rotatably supported by the boss 4.
5, the transmission connection can be ensured without the need for belts, chains, etc. In either case, both cylindrical bodies 20 of the connecting conductor 19,
The winding around 21 is carried out in the same manner as in the embodiment of FIG.

In FIG. 5, the wheel pad 14 is provided concentrically with respect to the steering wheel 1,
It is rotatably supported on the end of the main shaft 6 via a bearing 8' and is not coupled to the rotating shaft 15. In this case, therefore, the wheel pad 14 remains stationary regardless of the rotation of the steering wheel 1. Here, regarding the boss 4, belt pulleys 16 and 17 or cylinder bodies 20 and 21
On the opposite side, belt pulleys 16' and 17' and cylinder bodies 20' and 21' are attached coaxially to the wheel pad 14 and rotating shaft 15, respectively, and a belt pulley 16' of the same diameter is attached. and 1
Similarly, a belt 18' is wrapped around 7', and the flexible connecting conductor 19 from the switches 13 is first wound several times around a fixed cylinder 21', and then wound in the same direction around a movable cylinder 20' having the same diameter. After passing through the circumferential wall of the movable cylindrical body 20' and the rotating shaft 15, passing through the circumferential wall of the movable cylindrical body 16 and being wound several times in the same direction around the movable cylindrical body 16, it is led out of the steering wheel. be done.

As described above, according to the present invention, even when the steering wheel 1 is rotated, the pad 14 having the switches 13 only performs a translational movement with respect to the center of the wheel 1 within the range of the eccentric distance of the rotating shaft 15. Since the wheel is stationary, the direction of the pad 14 remains unchanged regardless of the rotation of the wheel 1, and the operability of the switches 13 is not impaired by steering. Moreover, the connecting conductor 19 to the switches 13
Despite the rotation of the steering wheel, there is no contact between the two cylinder bodies 20 and 21 or between 20' and
1', no longitudinal stress is applied to the connecting conductor 19, and it can be connected to the outside of the steering wheel and the switches 13 without using slip rings or brushes.
Energization between the two can be ensured. Furthermore, all the connecting wires and transmission coupling parts are hidden behind the pad 14 or boss 4, so
It does not damage the appearance. It goes without saying that the pad 14 can be provided with not only switches but also lamps, small meters, etc.

[Brief explanation of the drawing]

Fig. 1 is a sectional view through the center of a steering wheel having a support device according to the present invention, Fig. 2 is a front view thereof, Fig. 3 is a schematic front view of its cylindrical part, and Figs. 4 and 5 are different. FIG. 2 is a sectional view corresponding to FIG. 1 of the embodiment. 1...Steering wheel, 4...Boss, 6
... Main shaft, 13 ... Switches, 14
...Wheel pad, 15...Rotating shaft, 19...
Flexible connecting conductor, 20, 20'...Movable cylinder, 2
1, 21'...Fixed cylindrical body.

Claims (1)

[Scope of utility model registration request] A fixed cylindrical body is provided at the center of the steering wheel concentrically with respect to the steering main shaft connected thereto, and is rotatably supported eccentrically by the boss of the steering wheel, and can revolve around the fixed cylindrical body without rotating. A movable cylinder of the same diameter is provided, and the flexible connecting conductor of a small electrical device located on the wheel pad, which is supported so as not to rotate with respect to the steering wheel, is wound around the movable cylinder several times, and then around the fixed cylinder. A device for supplying electricity to a small electric device in a wheel pad of a steering wheel, which is characterized by winding the wheel multiple times in the same direction and leading it out of the steering wheel.