JPS598559A - Slip ring - Google Patents

Abstract

PURPOSE:To improve the mounting workability by fitting a slip ring intended for transmitting toward a car body, the outputs of switches attached to a steering wheel, to the car body via a turn restricting part where the inserted projection engages with this projection. CONSTITUTION:A slip ring 12 consists of two housings 13 and 14 which are longitudinally arranged in the opposed relation as to form a doughnut-like space, and a signal transmission mechanism (not illustrated in the drawing) which is capable of transmitting signals while allowing both housings 13 and 14 to be turned is interposed therebetween. A steering wheel is mounted on the upper face of the upper housing 13 via a bracket 15. The lower housing 14 has an integrally formed insert projection 17 at a specified position on the external perimeter of the lower face thereof, the projection 17 having resilient pieces 18 on both side faces in the shape of a wedge. The insert projection 17 is engaged between two turn restricting projections 21 of a combination switch 19 which is fixed to the car body, whereby facilitating the assembly of both 12 and 19.

Description

[Detailed Description of the Invention] This invention relates to an improvement in a slip ring that is interposed between the steering wheel and the vehicle body to transmit the output of switches connected to the steering wheel to the vehicle body. In particular, I am concerned with the slip ring that was installed and installed on the car body side.

Conventionally, a steering wheel has been equipped with various kinds of slip rings (slip rings), and each outlet of the switch 1 has been used as a means of transmitting the slip ring to the vehicle body.

This slip ring forms a donut-shaped space 1
"One housing is arranged oppositely at the bottom, the upper housing is fixed to the steering wheel, the lower housing is fixed to the vehicle body side, and there are 4 housings between the upper and lower housings. A number of signal transmission structures are provided that can transmit signals while accommodating the rotation of the blade.

Examples of this signal transmission mechanism include one consisting of a slider and a contact ring, or one consisting of a light guide ring and a light receiving element.
While the 7' ring wheels are rotating, the output from each steering wheel can be reliably transmitted to the electric circuit on the vehicle side.

Figure 1 shows an example of a King's slip ring.
In the figure, the slip link 1 is a single housing 2 arranged vertically in one direction without forming a bead-shaped space.
．． 3, and a bow transmission mechanism is provided between these 2 and 3, which is capable of transmitting signals while allowing rotation. When fixing this slip ring 1 to the vehicle body, it is necessary to fix the combination switch 4 to the vehicle body side. The lower housing 3 and the combination switch 4 are inserted into the through holes 7 of the bladder T-6, which are formed protrudingly at intervals of 9011 on the outer circumference of the side housing 3, and then the lower housing 3 and the combination switch 4 are connected with screws 8.

On the other hand, for the upper housing 2, a boss 9 formed protrudingly formed on the lower surface thereof is inserted into a fitting hole formed on the lower surface of the steering wheel (not shown), and then the upper housing 2 is screwed onto the steering wheel side (not shown). ) It is designed to be fixed.

However, in such a conventional slip ring, as for the lower housing 3, its slip ring 1-
6. Open the through hole 7 formed in the Nation Suite °1-
Is it possible to relatively fit it into the song while visually recognizing the boss 55 that protrudes from the steering wheel 55 that protrudes from the steering wheel? Insert -C into the side fitting hole J
There was a problem that the work was extremely poor because it was difficult to perform the work while checking visually.

The steering wheel side 2 can be adjusted only in the axial direction by the boss 9 (because the position is fixed, for example, if the steering wheel shirt 1- is slightly eccentric or tilted with respect to the vehicle body) (= J L-J
In such a case, there is a problem that the eccentricity cannot be absorbed between the -F side housing 2 and the smear link wheel.

This invention was made by paying attention to these conventional problems.
To provide a slip ring capable of sufficiently absorbing eccentricity even when a lift is taken out with a slight eccentricity or inclination.

In order to achieve the above object, the present invention provides a lower housing with an engaging protrusion that protrudes toward the vehicle body, and a rotation regulating portion that abuts the end surface of the engaging protrusion in the rotational direction on the vehicle body. are provided so as to restrict only the direction of rotation of the lower halves with respect to the vehicle body.

A preferred embodiment of the present invention will be described in detail below with reference to the attached drawings.

FIG. 2 is a perspective view showing the slip ring according to the present invention, and at d-3 in the same figure, the slip link 12 has two housings 13 and 14 arranged vertically opposite each other to form a donut-shaped space. A signal transmission mechanism (not shown) is provided between these housings 13 and 14 to allow signal transmission while allowing rotation of these housings 13 and 14.

Brackets 15 are formed protruding from the outer periphery of the second housing 13 at 90 degree intervals.
=j 4) A through hole 1G is formed to pass through.

On the other hand, an insertion protrusion 17 that protrudes toward the vehicle body in the axial direction of the steering shirt 1 is integrally formed at a predetermined position on the outer peripheral edge of the lower surface of the lower housing 14. Elastic pieces 18 are formed in a wedge shape on both side surfaces.

One is a combination switch that is fixed to the vehicle body, and has an insertion hole 20 in the center of which the steering link shaft is inserted, and a hole 20 in the lower housing 14 on the outer periphery. Two rotation regulating protrusions 21 are formed protruding from the flat tr to engage with the inserted insertion protrusions 17.

As shown in FIG. 3, the two rotation regulating protrusions 21 and 21
An insertion protrusion 17 that covers the elastic piece 18 on both sides is inserted into the gap, and the elastic force of the elastic piece 18 causes the rotation regulating protrusion 2 to
1. The insertion protrusion 17 is freely movably held within the space between 1.21 and 21, so that the slip ring 12 itself can be tilted relative to the combination switch 19, and can also be moved up and down.
It has a structure that allows it to move in the left and right and front and rear directions.

A second housing 13 that covers the slip ring 12
．． 14, as shown in cross section in FIG. The inner circumferential end surface 26 of the center hole is engaged with the inner circumferential end surface 26 of the center hole, and they are loosely fitted concentrically and rotatably to each other.

Since the slip ring according to the present invention is constructed as described above, the procedure for installing it is as follows: First, the combination switch 19 is fixed to the vehicle body side, and after the IC, the entire slip ring 12 is attached to the plane 1 of the upper housing 13.
The screw ring 12 is fixed to the lower surface of a steering wheel (not shown) using the through hole 16 of the bolt 15, and then the slip ring 12 fixed to the steering wheel is pressed in the direction of the arrow against the combination switch 19. At this point, the insertion protrusion 17 is inserted between the rotation regulating protrusions 21.21 while visually checking, and is held between the rotation regulating protrusions 21.21 by the elastic force of the elastic piece 18. The rotation of the lower housing 14 is reliably regulated by the rotation regulating protrusion 21.

In addition, even if the steering seat is installed eccentrically with respect to the vehicle body, the insertion protrusion 17 is moved between the rotation regulating protrusions 21 and 21 by the force of the elastic pieces 18 provided on both sides of the insertion protrusion 17. Since the insertion protrusion 17 is configured to be held in place, the insertion protrusion 17 becomes movable between the rotation regulating protrusions 21 and 21, and the steering shift lever 1 relative to the vehicle body is movable.
It is no longer possible to sufficiently tolerate the eccentricity of -.

d3. In the above embodiment J3, the elastic pieces 18 were formed on both sides of the insertion protrusion 17 protruding from the upper housing 14, but instead of this, as shown in FIG. Of course, the same effect can also be obtained by installing the bullet 1q piece 18a on the side of the rotation regulating protrusion 22 formed in the rotation regulating protrusion 22.

Next, FIG. 6 is a perspective view showing another embodiment of the slip ring according to the present invention. The feature of this embodiment is that a protrusion 27 is integrally formed on the outer periphery of the lower plate 1 to 148 of the lower housing 1/I and is designed to break when a certain force is applied in the circumferential direction. On the other hand, an insertion protrusion 17a is formed separately from this, and a fitting hole 28 that fits into the protrusion 27 is formed at the base of the insertion protrusion 17a.
By press-fitting the projection 27 into the insertion projection 8, the insertion projection 17a and the lower plate 14a of the lower housing 14 are integrally connected. With the above configuration, for example, the slider 22, which is placed in the upper and lower housings 13.1/1 and transmits signals, breaks and becomes sandwiched between the upper and lower housings, and the rotation between the upper and lower housings is locked, and the steering wheel If a dangerous situation occurs in which the steering wheel does not rotate, if the steering wheel is rotated too forcefully, the J-protrusion 27 shown in FIG.
By breaking the lower housing 14, the lower housing 14 can freely rotate without being restricted by the combination switch 19, and the steering wheel is released from the aforementioned locked state, thereby ensuring safety while driving. becomes.

In addition, in J3 of the above embodiment, the lower surface plate 1-14a and the insertion protrusion 17a of the lower housing 17'l are formed of -( book, and the lower surface play 1-1/Ia and the insertion protrusion 17
By appropriately drilling a slit in the joint part of a, the same effect can be obtained when the rotation between the upper and lower housings is cocked.

As is clear from the description of each of the embodiments above, in the case of the slip ring according to the present invention (=I structure), an insertion protrusion that protrudes toward the vehicle body is provided on the lower l\ushing that constitutes the slip ring. On the other hand, the slip ring is installed on the vehicle body side with a rotation regulating part that comes into contact with the end surface of the insertion projection in the rotational direction to restrict the rotation of the slip ring. It also has excellent effects such as being able to fully tolerate the eccentricity even if the steering wheel A・71~ is slightly eccentric with respect to the upper body. There is a C.

[Brief explanation of drawings]

Fig. 1 shows a conventional slip ring mounting (= J iJ structure, J perspective view, Fig. 2 is a perspective view showing a slip ring installation port structure according to the present invention, Fig. 3 is a front view of the slip ring. , FIG. 4 is a cross-sectional view of a slip ring, FIG. 5 is a perspective view of an elastic piece provided on the side of the combination simin switch, not showing the case 1, and FIG. 6 is a perspective view of another embodiment of the present invention, not showing the case. 12... Slip ring 13... Upper housing 14... Lower housing 17... Insertion projection 21... Rotation regulating projection Patent applicant Nissan Motor Co., Ltd. Niles Parts Co., Ltd. Figure 1

Claims (1)

[Claims] (1) To form a donut-shaped space, the two housings are arranged opposite to each other below, and the housing on the right side is fixed to the steering wheel, and the lower housing is attached to the upper housing at 1172 b. >i, and between the upper and lower housings there is 6'1 rotation and 3 transmission i'
iJ fil: In the slip ring for the signal transmission mechanism: The upper housing is provided with an insertion protrusion that protrudes toward the vehicle body, and the middle IA l! ll is provided with a rotation regulating portion that comes into contact with the end surface of the insertion protrusion in the rotational direction ().
A slip ring with four features.