JPH0332446Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is installed in a rotating body such as a steering wheel of an automobile, and is installed in a place where it is difficult to connect a lead wire from a non-rotating part to a rotating part. The present invention relates to a vehicular slip ring device for energizing electrical parts.

BACKGROUND TECHNOLOGY Conventionally, a slip ring device has been used, for example, as disclosed in Japanese Utility Model Application No. 51-152744.
By arranging a desired number of leaf spring contacts inside an outer case that rotates at the same time as the steering wheel, and by arranging a conductive plate that slides into contact with the leaf spring contacts on the top surface of the inner case, which is a non-rotating body, electricity can be supplied. are doing. A slip ring device is composed of a rotating outer case and a non-rotating inner case.

Problems to be Solved by the Invention In the conventional slip ring device described above, when the number of connected circuits increases, the width of the outer case and inner case is widened, and a large number of rows of conductive plates and leaf spring contacts are installed. . Therefore,
There is a problem that the outer diameters of the outer case and the inner case become large.

Means for Solving the Problems In a slip spring for a vehicle that electrically connects the steering side, which is a rotating body, and the vehicle body side, which is a non-rotating body, it is fitted onto a rotating steering shaft and has a movable contact piece. a second housing that is engaged with the first housing and that includes a movable contact piece;
fixed contact pieces interposed between the housing and the second housing, pivotally supported by the first housing, and contacting the movable contact pieces of the first and second housings on the upper and lower surfaces. The problems of the prior art described above are solved by comprising a third housing and a jacket tube that engages with the third housing and covers the steering shaft.

Operation When the driver rotates the steering wheel, the steering shaft rotates in the same manner, and the first housing and the second housing fixed to the steering shaft also rotate in the same manner. The first housing and the second housing have a movable contact piece that slides on a fixed contact piece of the third housing, which is a non-rotating body. The third housing is interposed between the first housing and the second housing, and has fixed contact pieces on its upper and lower surfaces.

Since the third housing is interposed between the first housing and the second housing, and the fixed contact piece and the movable contact piece are in contact with each other at the upper and lower parts of the third housing, a plurality of connection circuits are provided. It is possible to shorten the outer diameter of a slip ring device for a vehicle equipped with a slip ring device.

Embodiment 1 is a substantially cylindrical first housing having a flange 1a, and is screwed onto a steering shaft 3 through a screw hole 1a with a set screw 2. 1b
is an elastic locking protrusion formed at the lower end of the first housing 1, which engages with the engaging portion 4a of the second housing 4 to connect the first housing 1 and the second housing 4. are doing. first housing 1
In this example, two terminals 5a, 5b and movable contact pieces 6a, 6b made of leaf spring members are disposed on the flange 1a. Terminals 5a and 5b are connected to an electric circuit provided on the steering wheel. Movable contact pieces 6a, 6b
are always in contact with fixed contact pieces 7a and 7b fixed to the third housing 7. The second housing 4 is a ring-shaped member serving as a lid member, and includes terminals 8a, 8b and leaf spring-shaped movable contact pieces 9a, 9b.
is firmly attached. The third housing 7 is inserted into the substantially cylindrical first housing 1 and is interposed between the flange 1 a of the first housing 1 and the second housing 4 . The third housing 7 has ring-shaped fixed contact pieces 7a, 7b, 7c, 7 on the upper and lower surfaces.
d. It has a connector part 7e on one side. The third housing 7 has a connector portion 7e fitted into a hole 10a of the jacket tube 10, and is disposed within the jacket tube 10.

When the driver rotates the steering wheel, the steering shaft 3, first housing 1, and second housing 4 rotate in the same manner. Therefore, the movable contact pieces 6a, 6b of the first housing 1 slide on the movable contact pieces 6a, 6b of the third housing 7,
The movable contact pieces 9a, 9b of the second housing 4
It slides on the fixed contact pieces 7c, 7d of the housing 4 and is energized. Since the third housing 7 has fixed contact pieces 7a, 7b, 7c, and 7d on the upper and lower surfaces, the diameters of the first housing 1, the second housing 4, and the third housing 7 can be shortened. can do. Further, the third housing 7 has fixed contact pieces 7a, 7b, 7c, 7 on two planes, an upper surface and a lower surface.
Since it has a two-stage structure in which the movable contact pieces 6a, 6b, 9a, and 9b are provided and brought into contact with each other, it is possible to connect a large number of electric circuits in a limited space.

Effects The slip spring device for a vehicle according to the present invention includes a third housing, which is a non-rotating body and has fixed contact pieces on the upper and lower surfaces, between the first housing and the second housing, which rotate at the same time as the steering wheel. By arranging this, the outer diameter of the vehicle slip ring device can be shortened. In addition, in the present invention, by interposing the third housing between the first housing and the second housing, a large number of fixed contact pieces can be installed in the third housing, and a large number of electrical contacts can be installed in the third housing. It becomes possible to connect the circuit.

[Brief explanation of the drawing]

1, 2, and 3 are drawings showing a slip ring device for a vehicle according to the present invention.
The figure is a plan view, and FIG. 3 is a bottom view. DESCRIPTION OF SYMBOLS 1...First housing, 3...Steering shaft, 4...Second housing, 5a, 5
b, 8a, 8b... terminal, 6a, 6b, 9a, 9
b...Movable contact piece, 7a, 7b, 7c, 7d...Fixed contact piece, 7e...Connector part.

Claims (1)

[Scope of Claim for Utility Model Registration] A slip spring for a vehicle that electrically connects the steering side, which is a rotating body, and the vehicle body side, which is a non-rotating body, which is fitted on a rotating steering shaft and has a movable contact piece. a second housing that is engaged with the first housing and that has a movable contact piece; and a second housing that is interposed between the first housing and the second housing and that a third housing that is pivotally supported on the first housing and has fixed contact pieces on its upper and lower surfaces that contact the movable contact pieces of the first and second housings, and is engaged with the third housing; A slip ring device for a vehicle, comprising: a jacket tube that covers the steering shaft; and a jacket tube that covers the steering shaft.