JPH0123928B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement of a terminal for a rotary transformer, and more particularly, to a terminal for a rotary transformer that prevents lead wires from floating up.

Configuration of conventional example and its problems A conventional rotary transformer is shown in a partially sectional perspective view in Fig. 1 and in a sectional view in Fig. 2, and its rotating side terminal is shown in a perspective view in Fig. 3. An insulating rotating side terminal 2 fixed to a ferrite core 1 and a rotating plate 4 coupled to a rotating shaft 3 are fixed, while a fixed side ferrite core 5 is fixed to a fixed side terminal 6 and installed on a fixed base 7. ing. Further, the rotating shaft 3 is supported by a bearing 8 provided in the inner cylinder of the stationary ferrite core 5.

Ring-shaped coils 9a, 9b, 10a, 10b, 11 are provided in cut grooves on the inside of the rotating side ferrite core 1 and the outside of the stationary side ferrite core 5, respectively.
a, 11b, 12a, and 12b are arranged to face each other, and the rotating side ferrite core 1 and the stationary side ferrite core 5 are arranged with a gap of several tens of microns in between.

The lead wires 13 of the coils 9a, 10a, 11a, 12a are wound around the rotating terminal pin 16 of the conductor along the lead wire guide groove 14 of the rotating side ferrite core 1 and the lead wire guide groove 15 of the rotating side terminal 2 and soldered. ing.

Further, the lead wires 17 of the coils 9b, 10b, 11b, and 12b are fixed to the fixed terminal pins 19 of the conductor along the lead wire guide grooves 18 of the fixed ferrite core 5.

With the above configuration, the rotation of the rotating shaft 3 is directly transmitted to the rotating ferrite core 1.

However, in the above-mentioned rotating side terminal, after the lead wire is wound around the terminal pin, the lead wire lifts up between the rotating side and fixed side ferrite cores, and the lead wire comes into contact with the lead wire due to the rotation of the ferrite core. This had the disadvantage of causing damage to the material.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention has been developed to accommodate the lifted lead wire in the lead wire guide groove of the terminal when the lead wire is lifted up after winding the lead wire around the terminal pin. This provides a terminal for a rotary transformer that prevents contact with the ferrite core.

Structure of the Invention The present invention includes a plurality of protrusions having conductor pins parallel to the central axis on the outer peripheral surface of the cylindrical body that is stepped from one end surface perpendicular to the central axis of the cylindrical body; a groove extending from the central axis toward the outer periphery on an end surface perpendicular to the central axis; and a groove extending in the circumferential direction at the bottom parallel to the central axis on the inner cylindrical surface of the cylindrical body and connecting with the groove on the end surface. It is a cylindrical body with some insulating protrusions, and after the lead wire is wound around the terminal pin, which is the pin of the routing conductor, along the groove on the inner cylinder surface and the groove on the end surface, that is, the lead wire guide groove. If the lead wire rises,
The lead wire has a unique effect in that it is prevented from rising in the direction of the central axis within the widening portion of the groove of the inner cylinder.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 shows a terminal of a rotary transformer according to an embodiment of the present invention. FIG. 5 is a view taken along arrow A in FIG.

The terminal 20 includes terminal pins 21a,
21b, 22a, 22b, 23a, 23b, 24
a, 24b are on the outer peripheral surface 25, a protrusion 26a,
26b, 26c, 26d, and lead wire guide grooves 28a, 28b, 28 are provided on the end surface 27.
c, 28d, while the inner cylindrical surface 29 has a widened part 30 at the bottom of the groove, and lead wire guide grooves 28a, 28.
Lead wire guide groove 3 connected to b, 28c, 28d
1a, 31b, 31c, and 31d are provided.

Therefore, the lead wires 32 are inserted into the lead wire guide grooves 31a, 31b, 31c, 31d and 28a, 2, respectively.
8b, 28c, 28d along terminal pins 21a, 21b, 22a, 22b, 23
If the lead wire 32 lifts up after being wound around the lead wires 31a, 23b, 24a, and 24b, the widening portions 30 of the lead wire guide grooves 31a, 31b, 31c, and 31d can prevent the lead wire 32 from lifting up in the B direction.

In addition, in this example, there are four protrusions, eight terminal pins, and four lead wire guide grooves, and the lead wire guide grooves are provided at the positions of the protrusions, but the positional relationship between the protrusions and the lead wire guide grooves and the terminal The number of pins and protrusion lead wire guide grooves may be arbitrary. Furthermore, the terminal pin may protrude in any direction as long as the lead wire can be wound around it.

Effects of the Invention As described above, the present invention provides an insulating cylindrical body with a conductor pin parallel to the central axis on the outer peripheral surface of the cylindrical body, which is stepped from one end surface perpendicular to the central axis of the cylindrical body. The end face has multiple protrusions, a groove extending from the central axis to the outer circumference on the end face perpendicular to the central axis of the cylindrical body, and a groove extending in the circumferential direction at the bottom parallel to the central axis on the inner cylindrical face of the cylindrical body. By providing a groove that connects to the groove, it is possible to prevent the lead wire from coming into contact with the ferrite core due to the lifting of the lead wire, and as a result, it is possible to reduce the defective rate due to the lifting of the lead wire during mass production, and its practical effects are as follows: There is something big.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional perspective view of a conventional rotary transformer, Fig. 2 is a sectional view of Fig. 1, Fig. 3 is a perspective view of a conventional terminal, and Fig. 4 is a rotary transformer in an embodiment of the present invention. FIG. 5 is a perspective view of the terminal in FIG. 4, taken along arrow A in FIG. 20...Terminal, 21a, 21b, 22a,
22b, 23a, 23b, 24a, 24b...Terminal pin, 25...Outer peripheral surface, 26a, 26b, 2
6c, 26d...Protrusion part, 27... End surface, 28a, 2
8b, 28c, 28d...Lead wire guide groove, 29...
Inner cylinder surface, 30... widening part, 31a, 31b, 31
c, 31d...Lead wire guide groove.

Claims (1)

[Claims] 1. An insulating cylindrical body, a plurality of protrusions having conductor pins parallel to the central axis on the outer circumferential surface of the cylindrical body, which are stepped from one end surface perpendicular to the central axis of the cylindrical body, and the cylindrical body. A groove extending from the central axis toward the outer periphery is provided on an end surface perpendicular to the central axis of the body, and a groove on the end surface is provided on the inner cylindrical surface of the cylindrical body, parallel to the central axis and expanding in the circumferential direction at the bottom. A rotary transformer terminal having a connecting groove.