JPS6060704A - Rotary transformer and mounting structure thereof - Google Patents

Abstract

PURPOSE:To obtain the area opposing to the transformer on the rotating side as well as to contrive correspondence with multichannel by a method wherein a junction substrate and a relay tank are provided on the back side of the transformer located on the fixed side. CONSTITUTION:A part of the back side P of the fixed side of a rotary transformer 7 is formed thinly. A junction substrate 1b and a relay tank 3b are attached to the surface P side to be adhered to a fixed drum 5. Consequently, as the terminal treatments of the rotary transformer are all perfored on the back side P of the opposing face P' of the rotary transformer, the outside diameter phiD2 on the side of the opposing face P' of the rotary transformer can be used at the maximum of its efficiency.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rotary transformer and its installation in a magnetic head drum tape running guide, which simultaneously records and reproduces video and audio signals using a full-rotation magnetic head. Regarding structure.

[Background of the invention]

FIG. 1 is a schematic cross-sectional view of a conventional rotating magnetic head drum device. In the figure, 5 is a fixed drum, 7 is a stationary transformer, 9 is a rotating drum, and 8 is a rotating transformer. By the way, looking at the conventional fixed-side transformer 7, as shown in FIGS. 2 to 4, a relay board 1α is provided on the outer periphery of the surface facing the rotating-side transformer 8, and a notch 2b is provided in the core 2α on the back side of the relay board 1α. The tongue 73α is soldered to the relay board 1α.

However, such a fixed side transformer is a one-rotation side transformer 8.
Relay board 1α force on the opposite side! Therefore, there is a drawback that the p-channel Ifi' cannot be increased due to the limitation of φDI of the 5-rotation side transformer 8. Therefore, the methods shown in FIGS. 5 to 7 can be considered as a method for solving this drawback. That is, the flexible substrate 4 is bonded to the back surface of the core 2b so that a large amount of channel acid can be obtained.

However, when assembling this, the flexible substrate 4 must be passed through the hole A of the fixed head drum 5 for assembly, which is not easy to work with and is also very difficult to perform automatically.

[Purpose of the invention]

An object of the present invention is to provide a relay board 1b and a relay tongue 73b (i7) on the back surface P of the fixed transformer 7.
By attaching the fixed side transformer 7, the total area facing the rotary side transformer 7 is increased, making it compatible with multiple channels, and at the same time, providing a stationary side transformer 7 that can be automated for assembly into the fixed drum 5. .

[Summary of the invention]

In the present invention, the wall thickness of a part of the back surface P of the fixed side rotary transformer? The purpose is to make it thinner and transmit signals to that part via the relay board 1b and the relay connector 3b.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 8 and 9. FIG. 8 is a diagram of the fixed side transformer 7 of the present invention viewed from the back side P. In the figure, the surface P that is bonded to the fixed drum 5
A relay board 1h and a relay tongue 73b of the present invention are attached to the side.
It is attached. Its configuration will be explained. On the back surface P (the surface to be adhered to the fixed drum) of the fixed side transformer core 2h.

In order to attach the relay board 1b, a part of the core 7 is thinned to provide a step H, and the relay board 1b is directly bonded to the third part of the step as a first means of winding terminal. . Further, as a second means, there is a relay tongue 73h, and a relay tongue 75b.
has a casing 3A''' made of plastic material,
The metal terminal 3b'' is inserted into the casing 3b',
It is soldered to the relay board 1h', and the casing 3b' portion of the relay tongue 7!1b is directly adhered to the stationary transformer core 2b. Furthermore, as shown in FIG. 9, the back pie of the fixed side transformer 7 is directly glued to the inside of the fixed head drum 5.
The fixed transformer 7 is inserted into the hole A provided in the fixed head drum 5.
By inserting the relay tank 5hf, one position is determined, and the metal terminal 11 of the relay tongue 73h, which comes out from the fixed head drum 5 through the hole A, is terminated by the substrate 6 of the relay means.

According to this embodiment, is the terminal treatment of a one-turn transformer? Rotation l・
Since everything is done on the back side P of the opposing surface P' of the lance, the outer diameter of the opposing surface P' side of the rotating transformer is φD.

It is possible to use it as effectively as possible.

Furthermore, since the stationary transformer 7 of the present invention is assembled into the stationary drum 5 from the Z direction, the assembly can be easily automated.

〔Effect of the invention〕

According to the present invention described above, by providing the relay board and the relay tongue 7 on the back side of the fixed side transformer, a large area facing the rotating side transformer can be obtained.

Now supports multiple channels. Furthermore, since the fixed side transformer can now be installed vertically (in the Z direction) on the fixed drum, automation can be easily achieved.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a conventional rotating magnetic head drum device, Fig. 2 is a front view of a conventional fixed transformer, Fig. 3 is a side view thereof, Fig. 4 is a rear view thereof, and Fig. 5 is a schematic sectional view of a conventional fixed transformer. FIG. 6 is a front view of the fixed transformer, FIG. 6 is a side view thereof, FIG. 7 is a rear view thereof, FIG. 8 is a rear view of the fixed transformer of the present invention, and FIG. 9 is a diagram showing the fixed transformer of the present invention mounted on a drum. FIG. 3 is a cross-sectional view of a main part of the rotary head drum device showing a state in which the rotary head drum device is in a state where the rotary head drum device is in a state where 1a, 1h... Relay board 2α... Fixed transformer core 2b... Multi-channel fixed transformer core 5a, 3
b... Relay tongue 7 4... Flexible board 5...
・Fixed drum 6... Board A... Fixed drum hole 3b'... Casing 5b''
...Metal terminal 7...Fixed side transformer 8...Rotating side transformer 9...Rotating drum patent attorney Akira Takahashi 1 Diagram 3

Claims (1)

[Scope of Claims] 1. In a rotary transformer in which all signals are transmitted across a plane facing a rotating magnetic head drum, the electric transmission wire winding terminal of the fixed side transformer is placed on the back side of the opposite surface of the fixed side transformer, and the first A rotary transformer characterized by a backing plate in which a second relay means (terminal) is completely directly attached to the first relay means (substrate) via a relay means (substrate). 2. In the scope of claim 1 above, the second relay means (terminal) has a casing entirely made of plastic material, and a metal terminal is inserted into the casing, and the casing is A rotating transformer characterized by being directly attached to the back surface of the stationary transformer. 3. In the mounting structure of the rotating transformer for transmission, is the opposite surface of the rotating transformer on the back side? It is mounted directly inside the fixed head drum, and positioned by inserting the casing of the second relay means of the fixed side transformer into a hole provided in the fixed head drum. A mounting structure for a rotary transformer characterized by a backing plate in which the metal terminals of the second relay means that have come out are terminal-treated with the first and third relay means (substrate).