JPH073597Y2 - Slip ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is arranged between a steering column side, which is a fixed side, and a steering wheel side, which is a rotating side, to achieve electrical conduction between them. Regarding slip rings.

(Prior Art) Conventionally, the slip rings shown in FIGS. 4 to 6 have been known as the above slip rings. That is, as shown in FIG. 5, three ring-shaped fixed contacts that are concentric with each other are fixed to the fixed substrate 1 fixed to the steering column a side.
2 ₁ , 2 ₂ and 2 ₃ are provided. Further, the rotary board 3 which rotates integrally with the steering wheel (not shown), the sixth fixed contacts 2 ₁ as shown in FIG, 2 _2, 2 ₃ correspond consisting sliding contact leaf springs in these arcuate Sliding contacts 4 ₁ , 4 ₂ and 4 ₃ are provided so as to be offset from each other by approximately 120 ° in the circumferential direction.

In the conventional slip ring such (problem devised to be Solved), a ring-shaped fixed contact 2 ₁ to 2 ₃ is provided on the fixed substrate 1, the fixed contact 2 ₁ to 2 as shown in FIG. 4 The contact portions between ₃ and the sliding contacts 4 ₁ to 4 ₃ are located above and below the horizontal line l ₁ (see FIGS. 5 and 6) intersecting the axis l of the steering shaft.

Therefore, for example, in the case of an open car or the like, rainwater or the like enters the fixed substrate 1 through the gap 5 between the upper end of the peripheral side wall 1a of the fixed substrate 1 and the outer peripheral edge of the lower surface of the rotary substrate 3, and the fixed substrate 1
, The horizontal line l ₁ intersecting the axis l of the steering shaft
Collected at the lower position, fixed contacts 2 ₁ to 2 ₃ and sliding contacts 4 ₁ to
By adhering to the contact portion between the 4 _3, or causing Shiyoto failure, or the fixed contact 2 ₁ to 2 _3, and the sliding contact ₄₁ to ₃ is disadvantageously corroded.

The present invention has been made in view of the above circumstances, and provides a slip ring that does not cause a short failure even if rainwater or the like enters the fixed substrate and does not corrode the fixed contact and the sliding contact. The purpose is to do.

(Means for Solving the Problems) In order to achieve the above object, a slip ring according to the present invention is provided with a fixed contact at a position above a horizontal line intersecting with an axis of a steering shaft on a fixed substrate fixed to a steering column side. A ring-shaped sliding contact, which is disposed above the fixed substrate and rotates integrally with the steering wheel, is provided with a ring-shaped sliding contact that is in sliding contact with the fixed contact.

(Operation) The fixed contact is disposed on the fixed substrate at a position above the horizontal line intersecting the axis of the steering shaft, and the ring-shaped sliding contact is disposed on the rotating substrate disposed above the fixed substrate. Therefore, even if rainwater or the like enters the fixed substrate and accumulates at a position below the horizontal line of the fixed substrate that intersects with the axis of the steering shaft, the fixed contacts and sliding contacts and their contact parts may be exposed to water. Absent.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a cross-sectional view of a slip ring of the present invention. In FIG. 1, 10 is a fixed substrate fixed to the steering column a side, and a cylindrical boss portion 11 is integrally projectingly provided on the upper surface of the central portion. The steering column a is inserted into the portion 11,
A steering shaft (not shown) is rotatably inserted in the steering column a. On the upper surface of the outer peripheral edge of the fixed substrate 10, an annular peripheral wall 13 having a low height is integrally provided so as to project. On the upper side of the fixed substrate 10, a rotating substrate 14 that rotates integrally with a steering wheel (not shown) is provided. A fitting hole 15 is formed in the central portion of the rotating substrate 14, and the fitting hole 15 is rotatably fitted to the outer periphery of the fixed substrate 10 on the tip side of the boss portion 11. Since the flange portion 16 at the tip of the boss portion 11 is in contact with the upper surface of the rotating substrate 14, the boss portion 11
The rotation board 14 is prevented from coming off with respect to. An annular peripheral wall 17 is integrally projectingly provided on the lower surface of the outer peripheral edge of the rotating substrate 14,
The peripheral wall 13 of the fixed substrate 10 is fitted inside the lower end of the peripheral wall 17 with a slight gap S.

As shown in FIG. 2, a plurality of (three in this embodiment) fixed contacts 18 made of leaf springs are provided on the upper surface of the fixed substrate 10 above the horizontal line L ₁ intersecting the axis L of the steering shaft 12. ₁ , 18 ₂ and 18 ₃ are provided at intervals in the radial direction.

Further, as shown in FIG. 3, on the lower surface of the rotary substrate 14, three ring-shaped sliding contacts 19 ₁ , 19 ₂ , which are concentric with each other and correspond to the fixed contacts 18 ₁ , 18 ₂ , 18 ₃ , 19 ₃ is provided.
These sliding contacts 19 ₁ , 19 ₂ , 19 ₃ have corresponding fixed contacts 18 ₁ , 1
It is in sliding contact with 8 ₂ and 18 ₃ . Incidentally, in FIG. 2 20 _1, 20 _2, 20 ₃ in the fixed contacts 18 _1, 18 _2, 18 ₃ arranged in the outer portion of the fixed substrate 10 in correspondence with the connection terminals, these connecting terminals 20 _1, 20 ₂ and 20 ₃ are electrically connected to the fixed contacts 18 ₁ , 18 ₂ and 18 ₃ . The sliding contacts 19 ₁ , 19 ₂ and 19 ₃ are electrically connected to a horn switch or a cruise control switch (all not shown) in the steering wheel. Furthermore, the fixed contacts 18 ₁ , 18 ₂ , and 18 ₃ are electrically connected to devices and power supplies (all not shown) corresponding to the switches.

In the above configuration, the sliding contacts 19 ₁ , 19 ₂ and 19 _{3 on} the lower surface of the rotary substrate 14 that rotates integrally with the steering wheel are always connected to the corresponding fixed contacts 18 ₁ , 18 ₂ and 18 ₃ on the upper surface of the fixed substrate 10. The sliding contact allows electrical connection between the fixed side and the rotating side.

Since the peripheral wall 13 of the fixed substrate 10 is fitted inside the lower end portion of the peripheral wall 17 of the rotating substrate 14, it is difficult for rainwater or the like to enter the fixed substrate 10, and even if it penetrates, both peripheral walls 13 , 17
It is not drained to the outside through the gap S between them and is not accumulated.

Even if rainwater enters the fixed substrate 10, the fixed contact 18
₁ , 18 ₂ and 18 ₃ are the steering shaft 12 of the fixed substrate 10.
Since the sliding contacts 19 ₁ , 19 ₂ , 19 ₃ are arranged on the upper side of the horizontal line L ₁ intersecting the axis L of the sliding contact and are arranged on the lower surface of the rotating substrate 14, the fixed contacts 18 ₁ , 18 ₂ , 18 ₃ , sliding contact 19 ₁ , 1
9 ₂ and 19 ₃ and their contact parts are not exposed to water.

In the above embodiment, the fixed contacts and the sliding contacts are arranged in three, but the number is not limited to this, and the number of arranged contacts can be increased or decreased as necessary. .

(Effects of the Invention) As described above, the slip ring of the present invention is provided with the fixed contact at a position above the horizontal line intersecting the axis of the steering shaft of the fixed substrate fixed to the steering column side, and is arranged above the fixed substrate. A ring-shaped sliding contact, which is slidably in contact with the fixed contact, is provided on a rotary substrate that is installed and rotates integrally with the steering wheel.

Therefore, even if rainwater enters the fixed substrate, the fixed contact,
Since the sliding contacts and their contact parts are not exposed to water, short-circuit failure and contact corrosion do not occur.

[Brief description of drawings]

1 to 3 show one embodiment of the present invention, FIG. 1 is a sectional view of a slip ring of the present invention, and FIG. 2 is II of FIG.
-II sectional view, FIG. 3 is a sectional view taken along the line III-III of FIG. 1, FIG. 4 is a sectional view of a conventional slip ring, and FIG. 5 is a sectional view taken along the line VV of FIG. The figure is a sectional view taken along line VI-VI in FIG. 10 …… Fixed substrate, 12 …… Steering shaft, 14 ……
Rotating board, 18 ₁ to 18 ₃ …… Fixed contact, 19 _{1 to} 19 ₃ …… Sliding contact.

Claims (1)

[Scope of utility model registration request] 1. A fixed base plate fixed to the steering column side is provided with a fixed contact at a position above a horizontal line intersecting the axis of the steering shaft, and is arranged above the fixed base plate to rotate integrally with a steering wheel. A slip ring, wherein a ring-shaped sliding contact that is in sliding contact with the fixed contact is provided on a rotating substrate.