JPH03259402A - Rotary magnetic head device - Google Patents

Abstract

PURPOSE:To reduce the cost and to improve the assembling job performance by forming a relay terminal board projecting outward as the extension of a printed circuit board and connecting signal lines from a signal processing system circuit and a motor drive circuit to the terminal board. CONSTITUTION:A motor use printed circuit board 11 is arranged between a stator drum 1 and a motor 3 and a relay terminal board 12 is projected outward as the extension of the printed circuit board 11. A signal transfer means at the side of the stator drum 2 and the relay terminal board 12 are interconnected and the signal transfer means is connected to a signal processing circuit 14 via the relay terminal board 12. Then the stator wires of the motor 3 are connected to the relay terminal board 12 to connect the motor 3 to a motor drive circuit 15 via the relay terminal board 12. Since the relay terminal board 12 is used in common for external connection of the motor 3 and for external connection of a rotary transformer stator 10, number of components is reduced and the cost is reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating magnetic head device used in a video tape recorder (VTR), etc., and particularly relates to a rotating magnetic head device with an improved connection structure with an external circuit. This invention relates to a head device.

[Prior art] A rotary magnetic head device for a nuclide VTR was developed in
As described in Publication No. 3372, a first relay terminal board for a signal line is arranged on the side surface of a fixed drum (lower drum serving as a magnetic tape guide), and the first relay terminal board A board is used to connect the fixed side of the rotary transformer section of the rotating magnetic head device to the signal processing circuit, and a second relay terminal board for the motor is also provided on the motor side located at the bottom of the fixed drum. Then, the stator side of the motor and the motor drive circuit were connected using the second relay terminal board.

[Problems to be Solved by the Invention] As described above, in the conventional rotating magnetic head device, the relay terminal board for the rotary transformer and the relay terminal board for the motor are
Since one sheet for each was required, this led to an increase in cost and also caused problems in terms of space factor.

The present invention has been made in view of the above points, and its purpose is to reduce costs and improve assembly workability by making it possible to share a relay terminal board, and also to have an excellent space factor. An object of the present invention is to provide a rotary magnetic head device having a connection structure.

[Means for Solving the Problems] In order to achieve the above-mentioned objects, the present invention provides a rotary drum that rotates with a magnetic head mounted thereon, a fixed drum that rotatably holds the rotary drum, and a fixed drum that is fixed to the rotary drum. A rotating magnetic head device comprising a signal transmission means disposed in a portion facing the drum, and a motor disposed below the fixed drum for driving the rotary drum, wherein the fixed drum and the motor are connected to each other. A printed circuit board for the motor (motor board) is disposed between them, a relay terminal board is formed to protrude outward as an extension of this printed circuit board, and this relay terminal board is connected to the signal transmission means on the fixed drum side. The signal transmission means is connected to a signal processing circuit through the relay terminal board, and the relay terminal board and the stator side of the motor are connected to each other, and the signal transmission means is connected to the signal processing circuit through the relay terminal board. is configured to connect to the motor drive circuit.

[Operation] A relay terminal board is formed that protrudes outward as an extension of a motor printed circuit board (motor board) placed between the fixed drum and the motor, and a connector, for example, provided on the relay terminal board is formed. Signal lines from the signal processing system circuit and motor drive circuit are connected to. In addition, the coil on the stator side of the motor is connected to a predetermined conductor pattern on the printed circuit board and guided to the connector part, while the fixed side of the rotary transformer is also connected to a predetermined conductor pattern on the printed circuit board via a lead wire. and is guided to the above connector part.

In this way, the relay terminal board can be used for both the external connection of the motor and the fixed side of the rotary transformer.
The number of parts can be reduced, making it possible to reduce costs. Furthermore, since the relay terminal board is integrated with the printed circuit board (motor board), the dual-purpose relay terminal board can be assembled simply by incorporating the printed circuit board, and the ease of assembly is greatly improved compared to the conventional method. Moreover, the relay terminal board (printed circuit board)
Since the rotary transformer is located between the fixed drum and the motor, it is easy to connect to the fixed side of the rotary transformer and the stator side of the motor.

[Example 1] The present invention will be explained below using an example shown in FIG.

In the figure, 1 is a rotating drum, 2 is a fixed drum (lower drum serving as a magnetic tape guide), and 3 is a motor for driving the rotating drum. A magnetic head 4 is mounted on the rotating drum 1, and a movable rotary transformer constituting one side of a known rotary transformer (signal transmission means) is mounted on the lower surface of the rotating drum 1 facing the fixed drum 2. A side portion 5 is provided, and a magnetic head 4 is connected to the movable side portion 5 of the rotary transformer.

6 is a rotating shaft, on the top of which a rotating drum 1 is fixed;
The rotor 7 of the motor 3 is fixed to the lower part of the rotor 7, and the fixed drum 2 is connected to the middle part of the rotor 7 via a bearing 8.
is held rotatably. Reference numeral 9 denotes a stator of the motor 3, which is fixed to the lower part of the fixed drum 2. Further, on the side of the upper part of the fixed drum 2 facing the rotating drum 1,
A rotary transformer fixed side portion 10 that constitutes the other side of a known rotary transformer (signal transmission means) is provided.

A printed circuit board 11 is a motor board, and is fixed to the lower part of the fixed drum 2 and the stator 9 so as to be located between the fixed drum 2 and the motor 3. Reference numeral 12 denotes a relay terminal plate formed integrally with the printed circuit board as an extension thereof, and protrudes by a predetermined amount beyond the external dimensions of the motor 3 and the fixed drum 2. The relay terminal board 12 is provided with a connector 13 for connection, and signal lines from a signal processing system circuit 14 and a motor drive circuit 15 are connected to this connector 13. Further, the coil on the stator side 9 of the motor 3 is connected to a predetermined conductor pattern on the printed circuit board 11 and guided to the connector 13 portion, while the fixed side portion 10 of the rotary transformer is also connected to the printed circuit board via the lead wire 16. It is connected to 11 predetermined conductor patterns and led to the connector 13M5.

In the above configuration, when the motor 3 is driven by the motor drive circuit 15 and the rotor 7 is rotated, the rotating cylinder 1 is rotated together with the rotating shaft 6 at a predetermined speed,
The magnetic tape being run by the magnetic head 4 and the read/
The signals to be written are exchanged between the rotating side and the stationary side via a rotary transformer, and the signal from the magnetic head 4 is sent to the signal processing circuit 14 or the signal from the signal processing circuit 14 is sent to the magnetic head 4. do.

In this embodiment having such a configuration, the relay terminal board 12
is for external connection of motor 3 and rotary transformer fixed side part 1
Since it can also be used for external connection of 0, the number of parts can be reduced and costs can be reduced. In addition, relay terminal board 1
Since 2 is integrated with the printed circuit board 11, the dual-purpose relay terminal board can be assembled just by incorporating the printed circuit board 11, which greatly improves assembly workability compared to the conventional method. 10 and the stator 9 (lI!I) of the motor 3 are also easily connected.

[Effects of the Invention] As described above, according to the present invention, it is possible to reduce costs and improve assembly workability by making it possible to share the relay terminal board, and to have a connection structure with an excellent space factor. A rotating magnetic head device can be provided, and its value is great.

[Brief explanation of drawings]

FIG. 1 is a sectional front view of a rotary magnetic head device according to an embodiment of the present invention. ■...Rotating drum, 2...Fixed drum, 3...Motor, 4...Magnetic head, 5
...Rotary transformer movable side part, 6...
・Rotating shaft, 7... Rotor, 8... Bearing, 9... Stator, lO... Rotary transformer fixed side part, 11... ...Printed circuit board, 12
...Relay terminal board, 13...Connector, 1
4...Signal processing system circuit, 15...Motor drive circuit, 16...Lead wire. Room 1 Figure 5

Claims (1)

[Scope of Claims] 1. A rotating drum that rotates with a magnetic head mounted thereon, a fixed drum that rotatably holds the rotating drum, and a signal transmission device disposed at an opposing portion between the rotating drum and the fixed drum. and a motor for driving the rotating drum, wherein a relay terminal plate is disposed between the fixed drum and the motor, and a signal transmission means between the relay terminal plate and the fixed drum side. and connecting the signal transmission means to a signal processing circuit via the relay terminal board, and connecting the relay terminal board and the stator side of the motor through the relay terminal board. A rotary magnetic head device characterized in that the motor is connected to a motor drive circuit. 2. The rotating device according to claim 1, wherein the motor is disposed at a lower part of the fixed drum, and the relay terminal board is formed integrally with the printed circuit board as an extension of the printed circuit board for the motor. magnetic head device. 3. The rotating magnetic head device according to claim 2, wherein the relay terminal plate protrudes by a predetermined amount beyond the external dimensions of the motor and the fixed drum.