JPH0733416Y2 - Slip ring assembly - Google Patents

Description

The present invention relates to a shaft type slip ring assembly used for electrical contact between a rotating body and a non-rotating body.

[Prior Art] A slip ring assembly is disclosed in, for example, Japanese Patent Publication No. Sho 55-9789. As shown in FIG. 3, a plurality of slip rings 1 are insulated from each other with an insulating ring 2 interposed therebetween and a central shaft It is laminated in the direction and is integrally formed into a cylindrical shape. As shown in FIG. 4, the lead wire 3 from each slip ring 1 is drawn out through this cylinder. For example, it is used to make electrical contact between a rotating body and a non-rotating body that transmits signals such as the cylinder head of a VTR, and at that time, the electrical noise characteristics that occur during sliding rather than the current capacity. Is important, the smaller the sliding outer diameter of the slip ring assembly, the better. The same can be said for the influence of wear on the life.

[Problems to be solved by the device]

Therefore, each slip ring has a small diameter and a small wall thickness, but since they are arranged inside the cylinder, the ratio of the lead wire thickness to the inner diameter is large, which is a major problem in reducing the diameter. Becomes

[Means for solving the problem]

According to the present invention, a plurality of slip rings are laminated in the central axis direction while being insulated from each other with an insulating ring sandwiched therebetween to form a fully integrated cylindrical body. In the slip ring assembly that is pulled out through each of the slip rings, the lead wire of each slip ring is made up of only the core wire without the covering material, and the lead wire of this core wire is attached to the contact part with the slip ring of the other pole through the insulating material. It is characterized by wearing and fixing.

[Action]

According to the above configuration, since the covering material that occupies most of the thickness of the lead wire is eliminated, the ratio of the cross-sectional area of the lead wire that occupies the inside of the slip ring assembly becomes extremely small, and the diameter of the slip ring assembly increases. Therefore, it is possible to prevent the above-mentioned problem and promote the reduction in diameter.

Further, the lead wire does not move in the cylinder by being fixedly attached to the contact portion of the other end of the lead wire with the slip ring via the insulating material.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of the first embodiment, in which 1 is a slip ring having an outer diameter of 4 mm and an inner diameter of 3 mm.

4 is a lead wire, which is only a core wire without a covering material, has a diameter of 0.4 mm, and has an outer diameter of 0.6 mm with a covering material.
0.2mm thinner.

Reference numeral 5 denotes an insulating material, which is an insulating tape in this embodiment, which is used to attach the lead wire 4 to the slip ring 1 of another pole and has a thickness of 0.1 mm and a width of 0.4 mm.

According to the above configuration, the inner diameter of the slip ring 1 is 2.8 mm, as compared with the case where the lead wire coated with the coating material is used.
Even if the outer diameter was reduced to 3.8 mm, the inner diameter of the slip ring 1 inside the lead wire could be the same.

Further, as shown in FIG. 2, the lead wire 4 does not have to be circular, and a rectangular lead wire 4 having a thickness of 0.1 mm and a width of 1.3 mm is prepared.
When assembled using an insulating tape 5 with a thickness of 0.1 mm and a width of 1.3 mm, the slip ring 1 has an inner diameter of 2.2 mm and an outer diameter of 3.2 mm.
I was able to make it thin.

Although an insulating tape is used as an insulating material that also serves to fix the lead wire 4 in each of the above-described embodiments, an insulating paint is used for the lead wire 4.
Alternatively, it may be applied to the inside of the slip ring 1 so as to be adhered and fixed, or the rectangular lead wire 4 of the second embodiment may be formed by arranging lead wires having a thin circular cross section or a rectangular cross section. is there.

[Effect of device]

According to the present invention described in detail above, the lead wire of each slip ring has only a core wire without a covering material, and the lead wire of this core wire is attached to the contact portion with the slip ring of another pole via an insulating material. As a result, the insulation fixing state eliminates the covering material that occupies most of the thickness of the lead wire, and as a result, the ratio of the cross-sectional area of the lead wire that occupies the inside of the slip ring assembly can be reduced and the slip ring There is an effect that the increase in the diameter of the assembly can be prevented, and the decrease in the diameter can be promoted. This has the effect of improving the electrical noise characteristics and providing a highly reliable slip ring assembly.

Further, since the lead wire is attached and fixed to the contact portion of the other pole with the slip ring via the insulating material, there is an effect that the lead wire does not move in the cylinder.

[Brief description of drawings]

1 is a sectional view showing a first embodiment, FIG. 2 is a sectional view showing a second embodiment, FIG. 3 is a side view of a slip ring assembly, and FIG. 4 is a sectional view of a conventional technique. 1 …… Slip ring 4 …… Lead wire 5 …… Insulation material

Claims (1)

[Scope of utility model registration request] 1. A plurality of slip rings are laminated in the state of being insulated from each other with an insulating ring sandwiched therebetween in the direction of the central axis to form an all-in-one cylindrical body, and lead wires from the respective slip rings are formed in the cylinder. In the slip ring assembly that is pulled out through the inside, the lead wire of each slip ring is only the core wire with no covering material, and the lead wire by this core wire is attached to the contact part with the slip ring of the other pole through the insulating material. Slip ring assembly characterized by being fixed.