JPS60113908A - Method for fixing coil for rotary transformer - Google Patents

Abstract

PURPOSE:To easily obtain an inner-wind type winding by a method wherein, after a wire material has been wound on the groove to be used for the winding provided on the inner wall of a cylindrical coil, a bonding agent is applied and dried up in the groove. CONSTITUTION:A wire material 10 is wound around the winding groove 11 of a core 9, it is led out through the intermediary of a vertical groove 11, wound around a terminal 13 and connected to outside. The wire material 10 is enveloped by applying a bonding agent 14 in the groove 11, and the displacement of the wire material 10 is prevented. The bonding agent can be applied on the entire circumference of the winding groove by rotating the coil while the bonding agent is being discharged from an injector 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of fixing a coil for a cylindrical rotary transformer.

Structure of the conventional example and its problems The conventional rotary transformer has a planar shape as shown in FIG. The wire 1 was wound in the winding groove to form a coil.

In this structure, the wire 1 easily comes off from the core 2, so the wire 1 is fixed in the winding groove with an adhesive. Due to the structure of this planar rotary transformer, in which the coils are arranged concentrically, it is impossible to reduce the radial dimension with respect to the rotating shaft beyond a certain level, which makes it possible to reduce the size of products with built-in rotary transformers. was making it difficult. A cylindrical rotary transformer was devised as a promising method to solve this problem of miniaturization. Its structure is shown in Figure 2 VC
The inner-wound coil shown in FIG. 3 and the outer-wound coil shown in FIG. 3 are combined so that the respective coils 4 and 6 face each other. It is necessary to incorporate a coil 4 with a large diameter, and if the coil 4 is not in close contact with the bottom surface 8 of the winding groove 7 as shown in Fig. 4, a 1° warp will occur in the coil and cause a defect. ,
The winding process was extremely difficult and no practical product could be obtained.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems and makes it practical to wind the inner coil of a cylindrical rotary transformer.

Structure of the Invention Structure of the Invention The present invention provides an inner-wound type rotary transformer coil in which a wire is wound around one or more winding grooves provided on the inner wall of a cylindrical core. By applying an adhesive to the winding groove after winding and curing it, the winding can be prevented from slipping, and the wire does not need to be brought into close contact with the winding groove, making the winding work relatively easy. be.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 6 to 8. FIG. 6 is a cross-sectional perspective view of the cylindrical rotary transformer Senwachi-wound coil of this embodiment, in which four winding grooves 11 are provided in the core 9, and the wire rod 1o is wound in the winding grooves 11. ing. Reference numeral 12 denotes a vertical groove for drawing the wire 10 out of the coil, and the wire 1 drawn out through the vertical groove 10
o is wound around the terminal 13 and connected to the outside.

FIG. 7 is an enlarged partial sectional view of the winding portion of the coil.

The adhesive 14 applied in the winding groove 11 wraps around the wire 1o and prevents the wire 10 from shifting.

FIG. 8 shows an example of the coating method. After winding, the coil is rotated while the adhesive is dispensed from the syringe 15 to coat the entire circumference of the winding groove.

Effects of the Invention As described above, in the present invention, since the wire is fixed with adhesive after winding, troubles due to displacement of the wire can be prevented. In addition, as shown in FIGS. 6 and 7, there is no need for a winding method in which the wire is placed in the winding groove, and a gap that prevents the wire from protruding from the groove is allowed. , winding work becomes easier than when no adhesive is applied.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a planar rotary transformer, Fig. 2 is a cross-sectional perspective view showing the basic structure of an inner-wound coil of a cylindrical rotary transformer, and Fig. 3 is a cross-sectional view of the outer-wound coil of a cylindrical rotor IJ-transformer. Perspective view showing the basic configuration, Figures 4 and 6
The figure is an enlarged cross-sectional view of the winding part of the inner-wound coil, FIG. 6 is a cross-sectional perspective view of the inner-wound coil according to an embodiment of the present invention, and FIG. 7 is an enlarged cross-sectional view of the winding part of the inner-wound coil. , FIG. 8 is a conceptual diagram showing one method of applying adhesive to the inner wound coil. 6...core, 16...syringe needle. Name of agent: Patent attorney Toshio Nakao and one other person'j
s 1 tzo Figure 2 Figure 3 Figure 4 Figure 5 Figure 6' Figure 71A 15 s Figure

Claims (1)

[Claims] A rotary transformer in which a wire is wound in one or more winding grooves provided in the circumferential direction on the inner wall of a cylindrical core, and after this winding, an adhesive is applied and hardened in the winding groove. How to fix the coil.