JPH0748435B2 - Rotary transformer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary transformer used for transmitting signals of mutually rotating ones.

2. Description of the Related Art FIG. 11 shows a circuit diagram of magnetic recording using a conventional general rotary transformer. FIG. 12 is a sectional view showing the structure of the main part of a conventional rotary transformer. 1a, 1
Reference numeral b denotes an input side signal coil wound around a cylindrical inner ferrite core 6, and reference numerals 2a and 2b denote output side signal coils wound around a cylindrical outer ferrite core 5. 3 is a short ring provided to prevent signal interference between these two signal transmission systems, and 4a and 4b are heads for magnetic recording.

In the conventional rotary transformer, the coil winding specifications such as the number of turns in one signal transmission system are only one set and cannot be selected.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, since it is necessary to separately design products for a wide variety of recent winding specifications, the number of types of rotary transformers increases and standardization becomes difficult. Inevitably, workability will be significantly reduced due to specifications switching loss in the winding process. In addition, since a small number of products are used, the assembling process becomes complicated, which hinders quality and cost reduction such as mixing of different kinds.

The present invention is intended to solve the above problems, and an object thereof is to standardize a wide variety of winding specifications and to significantly reduce the number of types.

Means for Solving the Problem In order to solve the problem, the rotary transformer of the present invention has a coil that constitutes a signal transmission system wound around a ferrite core on the input side and a ferrite core on the output side, respectively.
The winding start terminal and the winding end terminal of the input side signal coil for the output side signal coil, the output side signal coil for the input side signal coil, or both signal coils can be selected according to the winding specifications of the coil. .

Operation With this configuration, it is possible to select the terminals having the required winding specifications according to the application, and thus it is possible to significantly reduce the number of types.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram of a magnetic recording section using a rotary transformer according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a configuration of a main part of a rotary transformer according to an embodiment of the present invention.

In the present embodiment, two signal transmission systems are formed, and two signal transmission systems are used, one for each of the input signal coils 7a, 7b and 7c, 7d for each of the output signal coils 8a, 8b. Further, the input side signal coils 7a to 7d are connected to terminals 11a, 11b, 11c and 11c.
Three pieces of d, 11e, and 11f are provided, and signals are transmitted by selecting two terminals.
A short ring 9 is provided between the two signal transmission systems as in the conventional technique.

Next, the operation will be described below. Here, the signal transmission of the system of the output side signal coil 8a will be described. The input side signal coil has input signal terminals (11a, 11c), (11a, 11b),
By selecting (11b, 11c), three types of winding specifications can be selected. When the terminal is selected, the remaining terminals are not connected to anything, so it is the same as the one without the remaining terminals electrically and magnetically. Therefore, the circuit in which the two terminals are selected is the same as the transmission circuit of the conventional rotary transformer, and signal transmission is performed without any problem.

In this embodiment, two input side signal coils 7a and 7b are provided for the output side signal coil 8a in one signal transmission system, but there may be any number of the input side signal coils depending on the application. Further, the input side signal coils 7a and 7b may have separate terminals as shown in FIG. 3, or the winding groove may be divided and formed as shown in FIG.

Next, another embodiment of the present invention will be described with reference to the drawings.

FIG. 5 is a circuit diagram of a magnetic recording section using a rotary transformer in another embodiment of the present invention, and FIG. 6 is a sectional view showing the configuration of the main part of the rotary transformer.

In the present embodiment, two signal transmission systems are configured, and two signal transmission systems are provided, one for each input signal coil 7a, 7b and one for each output signal coil 8a, 8b and 8c, 8d. . Further, the output side signal coils 8a to 8d are connected to terminals 14a, 14b, 14c and 14c.
Three d's, 14e's, and 14f's are provided, and signals are transmitted by selecting two terminals.
A short ring 9 is provided between the two signal transmission systems as in the conventional technique.

Next, the operation will be described below. Here, the signal transmission of the system of the input side signal coil 7a will be described. Output side signal coils are (14a, 14c), (14a, 14b), (14b, 14c) 3
You can select the type of winding specifications. When selecting two terminals, the remaining terminals are not connected to any
Magnetically, it is the same as the one without the remaining terminals. Therefore, the circuit in which the two terminals are selected is the same as the transmission circuit of the conventional rotary transformer, and signal transmission is performed without any problem.

In the present embodiment, two output side signal coils 8a and 8b for the input side signal coil 7a in one signal transmission system are provided, but there may be any number of output side signal coils depending on the application. Further, the output side signal coils 8a and 8b may have separate terminals as shown in FIG. 7, or the winding groove may be divided and formed as shown in FIG.

As still another embodiment, as shown in FIGS. 9 and 10, the above two embodiments may be combined.

That is, the input side signal coil 7a ~ 7d, the signal input terminal 11a ~ 11f is configured to have, the output side signal coil 8a ~ 8d,
The signal output terminals 12a to 12f may be provided to select a coil on the input side and the output side to further expand the selection range of the signal transmission system.

EFFECTS OF THE INVENTION As described above, according to the present invention, the winding start terminal and the winding end terminal of the input side signal coil for the output side signal coil or the output side signal coil for the input side signal coil or both signal coils are set according to the winding specifications of the coil. By adopting a configuration that allows you to select from a wide variety of recent years, we have standardized the winding specifications of a wide variety of rotary transformers, significantly reducing the number of product types, improving productivity, and realizing an excellent rotary transformer that can reduce costs. It is possible.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a magnetic recording section using a rotary transformer according to an embodiment of the present invention, FIG. 2 is a sectional view showing a configuration of a main part of a rotary transformer according to an embodiment of the present invention, and FIG. A circuit diagram of a magnetic recording section showing another configuration method of the rotary transformer in one embodiment of the present invention,
FIG. 4 is a sectional view of a main part showing another winding method of a rotary transformer in one embodiment of the present invention, FIG. 5 is a circuit diagram of a magnetic recording portion of a rotary transformer in another embodiment, and FIG. FIG. 7 is a cross-sectional view showing the structure of the main portion, FIG. 7 is a circuit diagram of a magnetic recording portion of another example, FIG.
FIG. 10 is a circuit diagram of a magnetic recording unit using a rotary transformer according to still another embodiment of the present invention, FIG. 10 is a sectional view showing the configuration of the main part of the rotary transformer, and FIG. 11 is a magnetic diagram of a conventional rotary transformer. FIG. 12 is a circuit diagram of the recording unit, and FIG. 12 is a sectional view of the main part. 7a, 7b, 7c, 7d …… Input side signal coil, 8a, 8b, 8c, 8d …… Output side signal coil, 9 …… Short ring, 10a, 10b ……
Magnetic recording head, 11a, 11b, 11c, 11d, 11e, 11f …… signal input terminal, 12 …… outer ferrite core, 13 …… inner ferrite core, 14a, 14b, 14c, 14d, 14e, 14f …… Signal output terminal.

Claims (1)

[Claims] 1. A coil forming a signal transmission system is wound around an input side ferrite core and an output side ferrite core respectively, and an input side signal coil for an output side signal coil, an output side signal coil for an input side signal coil, or both. A rotary transformer configured so that the winding start terminal and winding end terminal of the signal coil can be selected according to the coil winding specifications.