JPH0587964B2 - - 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 facilitates terminal processing of lead wires of a rotary transformer.

Structure of the conventional example and its problems A conventional rotary transformer is shown in FIG. 1 as a partial cross-sectional perspective view, FIG. 2 as a cross-sectional view, and the rotating terminal as shown in FIG. An insulating rotating side terminal 2 fixed to a side 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. has been done. Further, the rotating shaft 3 is supported by a bearing 8 provided inside the fixed side 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, and 12a are wound around the rotating terminal pin 16 of the conductor along the lead wire guide groove 14 of the rotating ferrite core 1 and the lead wire guide groove 15 of the rotating terminal 2. .

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 rotating side terminal as described above, 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 due to the rotation of the ferrite core,
This has the drawback of damaging the lead wire and changing the characteristics of the rotary transformer.

Purpose of the Invention In view of the above drawbacks, the present invention provides a terminal for a rotary transformer that automatically prevents the lead wire from lifting up by applying tension to the lead wire when winding the lead wire around the terminal pin. It is.

Structure of the Invention The present invention provides a plurality of protrusions having conductor pins parallel to the central axis on the outer peripheral surface of the insulating cylindrical body which is stepped from one end surface perpendicular to the central axis; It is composed of a groove extending from the central axis toward the outer periphery on an end face perpendicular to the central axis of the cylindrical body, and a V-shaped groove provided on the outer periphery of the cylindrical body between the end face and the protrusion, By routing the lead wire from the groove on the end face to the V-shaped groove on the outer periphery, a unique effect is obtained in that the lead wire can be inserted into the V-shaped groove and fixed.

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 partial sectional view of section A in FIG. 4.

The terminal 20 includes terminal pins 21a,
21b, 21c, 21d are protrusions 22a, 22
b, 22c, 22d, and one end surface 23 has lead wire guide grooves 23a, 23b, 23.
c, 23d are provided, and a V-shaped groove 25 is provided in the outer peripheral portion 24, and a lead wire guide groove 23a, 23b, 23c,
It is provided around the entire circumference including 23d.

In the rotary transformer terminal configured as described above, when the lead wire 26a along the lead wire guide groove 23a is routed along the V-shaped groove 25 to the terminal pin 21b, the lead wire 26
a is automatically inserted into the V-shaped groove 25, and then the lead wire 26a is wound around the terminal pin 21b and soldered. In this way, connect the remaining lead wire guide grooves 23b, 23c, 23d and the terminal pin 2.
Lead wires 26 such as 1c, 21d, 21a
b, 26c, and 26d, respectively, and fix them.

As described above, by providing a V-shaped groove on the outer periphery of the terminal and routing the lead wire through this groove, the lead wire can be easily fixed.

Note that in the above embodiment, the protrusions 22a, 22b, 2
Lead wire guide grooves 23a and 2 are provided at positions 2c and 22d.
3b, 23c, and 23d, but the V-shaped groove 25
Any position is acceptable as long as the lead wire can be fixed in place.

Effects of the Invention As described above, the present invention provides a plurality of protrusions having conductor pins parallel to the central axis on the outer peripheral surface of the insulating cylindrical body, which is stepped from one end surface perpendicular to the central axis. a groove extending from the central axis toward the outer periphery on an end face perpendicular to the central axis of the cylindrical body; and a V-shaped groove provided on the outer periphery of the cylindrical body between the end face and the protrusion. This allows the lead wire to be automatically fixed by simply routing the lead wire.
It is possible to greatly reduce defects caused by floating lead wires during mass production, and its practical effects are significant.

[Brief explanation of drawings]

FIG. 1 is a partially 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 according to an embodiment of the present invention. A perspective view of the terminal, FIG. 5 is a sectional view of the A portion in FIG. 4. 20...Terminal, 21a, 21b, 21
c, 21d...terminal pin, 22a, 22
b, 22c, 22d...protrusion, 23a, 23
b, 23c, 23d...Lead wire guide groove, 25...
...V-shaped groove.

Claims (1)

[Claims] 1 It has a plurality of terminal pins parallel to the central axis on the protruding part provided on the outer peripheral surface, and has a lead wire guide groove extending from the central axis toward the outer periphery on the end face perpendicular to the central axis, and has a plurality of terminal pins on the outer peripheral surface. From an insulator having a V-shaped groove extending in the circumferential direction that connects with the lead wire guide groove on the end surface, and a lead wire guide groove on the inner circumferential surface that is parallel to the central axis and connects with the lead wire guide groove on the end surface. A ring-shaped rotary transformer terminal.