JPS60130110A - Manufacture of rotary transformer - Google Patents

Abstract

PURPOSE:To prevent a coil from disassembling or deforming by forming annular grooves on the opposed surfaces of a rotor and a stator, inserting metals, and cutting the metal finely in spiral state to obtain the coil. CONSTITUTION:Annular grooves 13 for mounting a coil on the opposed surfaces of core 12, metal conductors 14 are inserted, and secured with an adhesive. Conductors 14 are cut finely in a spiral state, and a coil 15 is formed. With this structure, the problems in the conventional one can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The above-mentioned field of application relates to a method for manufacturing rotary transformers used in video tape recorders and the like.

Conventional configurations and their problems Rotary transformers are widely known as components in video tape recorders and the like that transmit recording signals to the rotating magnetic head and transmitting playback signals from the rotating magnetic head without contact. .

FIG. 1 shows a sectional view of a flat rotary transformer for a video tape recorder. This rotary transformer includes a rotor having grooves 3 and 4 in a rotor core 1 made of ferrite or the like, and a rotor having coils 8 mounted in each groove 3 and 4, and grooves 5 and 6 in a stator core 2 made of ferrite or the like. The rotor core 1 and stator core 2 have grooves 3, 4 and 5°6 facing each other to maintain a gap qk. They are arranged in concentric circles.

FIG. 1 shows a cross-sectional view of a two-channel rotary transformer. On the rotor side, two concave grooves 3 and 4 are formed concentrically in the rotor core 1, and each time? A coil 7.8 wound with copper wire etc. was attached to +43+4.

Similarly, on the stator side, there are concave grooves 5.6 in the stator core 2.
The coils 9 and 1○ are attached to the grooves 6 and 6.

FIG. 2 shows an enlarged view of the groove portion in which the coil of FIG. 1 is mounted. This is a diagram in which a coil 9 wound with copper wire or the like is attached to the groove 5. Conventional methods for manufacturing coils by winding copper wire, etc., have problems such as deformation and bulges in the coil, resulting in reduced productivity and variations in characteristics.

OBJECTS OF THE INVENTION The present invention is intended to improve the deformation and looseness of the coil, which were problems in the conventional method of manufacturing a coil wound with copper wire or the like.

Structure of the Invention In order to achieve the above object, the present invention provides annular grooves on the mutually opposing surfaces of a rotor core and a stator core, inserts and fixes a conductive metal, etc. into the grooves, and thins the conductive metal. The coil is formed by cutting into a spiral shape, and this method can completely eliminate problems such as dispersion and deformation of the coil, which have conventionally been a problem in manufacturing.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the invention will now be described with reference to FIGS. 3 to 6.

FIG. 3 shows a state in which a conductor 14 made of a conductive metal or the like is inserted into a groove 13 provided in the rotor core or stator core 12, into which an annular coil is attached, and is fixed with an adhesive. Next, as shown in FIGS. 4 and 6, the conductor 14 is cut into a thin spiral shape using a laser or the like. At this time, the conductor has a thinly wound shape and forms one coil 15. By using such a manufacturing method for the coil 15, it is possible to improve problems such as coil unevenness and deformation that have been problems in the past.

FIG. 6 shows a state in which an insulator 16 is applied to the coil 15 in order to improve the insulation between the grooved conductors as shown in FIG.

Effects of the Invention As described above, according to the method for manufacturing a rotary transformer of the present invention, problems such as unevenness and deformation of the coil, which had been a problem in conventional production, can be improved. Although rationalization was difficult due to problems such as deformation, the present invention has all the advantages such as easy rationalization.
It is a dog of industrial value.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a general rotary transformer, Fig. 2 is an enlarged view of a concave groove in which a coil of a conventional rotary transformer is installed, and Figs. 3 to 5 are a method of manufacturing a rotary transformer according to the present invention. A cross-sectional view and a top view of the main parts of one embodiment, and FIG. 6 is a cross-sectional view of the main parts of another embodiment. 12...Rotary core or stator core,
13... Concave groove, 14... Conductor, 15... Coil, 16... Insulator. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) Annular grooves are provided on the opposing surfaces of the rotor core and stator core, and the conductor is fully inserted into the annular groove, and the conductor is cut into a spiral shape to form a coil. A manufacturing method for forming a rotary transformer. (3) A method for manufacturing a rotary transformer according to claim 1, wherein the coil is formed by completely applying an insulator to a thinly wound conductor.