JP2895692B2 - Rotating magnetic head device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary magnetic head device used for a magnetic recording / reproducing device or the like.

[0002]

2. Description of the Related Art In recent years, a rotary magnetic head device used for a VTR or the like has been required to be smaller and lighter.
Also, high performance such as multiple heads and wide band is required,
The number of rotary magnetic head devices equipped with an amplifier circuit and the like is increasing.

FIG. 5 is a structural sectional view of a conventional rotary magnetic head device, and FIG. 6 is an assembled perspective view of the conventional rotary magnetic head device. In the figure, reference numeral 21 denotes a rotating drum, and a magnetic head 22 is fixed to the rotating drum 21 by screws 23.
The rotary rotor 24a of the rotary transformer 24 is fixed to a flange 26 to which the rotary shaft 25 is inserted and fixed by an adhesive or the like, and the flange 26 is fixed to the rotary drum 21 by screwing or the like. At this time, a relay board 27 such as a glass epoxy (glass epoxy) board is mounted on the rotating rotor 24a. Also, the winding 28 of the rotating rotor 24a
Are connected to the relay board 27 by soldering or the like. Further, a plurality of first connection terminals 29 insulated by a resin mold or the like are mounted on the relay substrate 27 by soldering or the like so as to penetrate the rotary drum 21. The winding 28 and the first connection terminal 29 are electrically connected by the relay board 27. And the rotating drum 21
A circuit board 30 on which an electronic circuit such as an amplifier circuit for recording signals and reproduction signals is formed is connected to the first connection terminals 29 by soldering or the like. Magnetic head 22 and circuit board 3
0 is connected by soldering or the like to a plurality of second connection terminals 31 that are insulated by a resin mold or the like that penetrates the rotary drum 21. Further, the rotary magnetic head device is configured by inserting the rotary shaft 25 on the rotary drum side into an insertion hole of the fixed drum 32 to which the fixed stator 24b of the rotary transformer 24 is adhered, where the rotary bearing 33 is mounted. It becomes.

However, in such a structure, the rotating rotor 24a, the magnetic head 22 and the circuit board 3
The exclusive connection terminals 29 and 31 are required for the connection with 0, so that the number of connection points is increased, the electrical characteristics are reduced, and the manufacturing process is complicated.

Further, forming the electronic circuit on the rotating rotor 24a increases the size of the rotating rotor 24a and hides the magnetic head 22, so that the connection between the magnetic head 22 and the circuit board 30 can be reduced. Did not. Since the circuit board 30 is located outside the rotary drum 21, it is disadvantageous for widening the recording signal.

[0006]

In a rotary magnetic head device having a conventional structure, a dedicated connection terminal is required for connecting the rotary rotor, the magnetic head, and the circuit board, and the number of connection points is increased. And the manufacturing process became complicated. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a rotary magnetic head device that facilitates connection between a magnetic head and a circuit board, has improved electrical characteristics, and simplifies a manufacturing process.

[0007]

In order to achieve the above object, a rotary magnetic head device according to the present invention has a magnetic head mounted on a rotary drum and a magnetic head provided on the magnetic head.
A first connection pad fixed to the rotating drum,
A rotary transformer rotor that rotates integrally with the rotary drum,
A second connection pad provided on the rotor;
A first spring contact is provided on one side and a second spring contact is provided on the other side.
Provided with contacts and increased on at least one side
An electronic circuit including a width circuit is formed, wherein the first spring contact
Are in contact with and electrically connected to the first connection pad,
And the second spring contact makes contact with the second connection pad
Electrically connected to the magnetic head and the magnetic head.
The rotors are electrically connected via the amplifier circuit.
A circuit board attached to the rotating drum,
The above-mentioned fixed drum is provided so as to face the rotor.
It is characterized by a rotating transformer status .

[0008]

According to the above-mentioned means, a circuit board for forming an electronic circuit is arranged between the rotating rotor and the magnetic head, and the magnetic head, the rotating rotor and the circuit board are directly connected by a spring contact provided on the circuit board. As a result, the electrical characteristics are good, a dedicated connection terminal is not required, and the manufacturing process can be simplified.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a rotary magnetic head device according to one embodiment of the present invention, and FIG. 2 is an assembled perspective view of the rotary magnetic head device according to one embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a rotary drum, and a magnetic head 2 is fixed to the rotary drum 1 by screws 3.
The rotary rotor 4a of the rotary transformer 4 has a rotary shaft 5
Is fixed with an adhesive or the like to the flange 6 into which the upper rotary drum 1 is inserted and fixed.
Fixed to. In addition, a wiring board 7 electrically connected to the rotor coil is arranged on the rotating rotor 4a. Then, a donut-shaped circuit board 8 such as a glass epoxy board on which an electronic circuit is formed as shown in the diagram of FIG. 3 is disposed between the magnetic head 2 and the wiring board 7 on the rotating rotor 4a. The circuit board 8 is fixed to the upper rotating drum 6 with fixing screws.

In FIG. 3, reference numeral 2 denotes a magnetic head for scanning / recording / reproducing by scanning a magnetic tape (not shown);
Denotes an amplifier circuit for amplifying a recording signal, and 16 denotes an amplifier circuit for amplifying a reproduction signal. Reference numeral 17 denotes a changeover switch for switching the recording / reproducing signal of each magnetic head, and reference numeral 18 denotes a control circuit of the changeover switch 17. Thus, by using the electronic circuit as shown in FIG. 3, the number of transmission channels of the rotary transformer 4 required for the same number as the conventional magnetic head can be greatly reduced, and the rotary transformer 4 having a smaller diameter than the conventional one can be used. Obtainable. As shown in FIGS. 1 and 2, on the circuit board 8, a spring contact 9 for electrically connecting the magnetic head 2 to the wiring board 7 on the rotating rotor is mounted.

FIGS. 4A and 4B are a top view and a side view of the spring contact 9, respectively. As shown in the figure, the spring contact 9 is a leaf spring portion 41 serving as a connection terminal.
And a resin mold portion 42, and mounted on a circuit board by soldering or the like at the same time as other electronic components. When the cylinder head is assembled, each of the spring contacts 9 configured as described above includes a connection pad 11 provided on a wiring board 10 disposed on the magnetic head 2 and the rotating rotor 4a.
Connection pad 12 provided on wiring board 7 disposed thereon
To obtain an electrical connection.

Subsequently, as shown in FIG. 1, the rotary shaft 5 of the rotary drum is inserted into the insertion hole of the lower fixed drum 13 to which the rotary bearing 14 is attached, to which the fixed stator 4b of the rotary transformer 4 is adhered, and rotated. A head type magnetic recording / reproducing apparatus is configured.

As described above, a donut-shaped circuit board 8 on which an electronic circuit such as an amplifier circuit for a recording signal / reproduction signal is formed.
Is disposed between the rotary rotor 4a of the rotary transformer 4 and the magnetic head 2, and the circuit board 8, the rotary rotor 4
a, and the connection between the magnetic head 2 is made by connecting the spring contact 9 provided on the circuit board 8 to the connection pad 12 of the wiring board 7 arranged on the rotating rotor 4a and the connection pad 11 of the wiring board 10 arranged on the magnetic head 2. By assembling the cylinder head when assembling the cylinder head.

Since both sides of the circuit board 8 are boards, a sufficient mounting area can be obtained as long as a recording / reproducing signal amplifying circuit is provided. As a result, the rotation ro
Connection between the magnetic head 4a, the magnetic head 2 and the circuit board 8
Since the transmission distance can be shortened, there is no need for a dedicated connection terminal, so that the manufacturing process is simplified and the electrical characteristics can be improved. Switch to the circuit board
Provide a switch 17 to reduce the number of rotary transformer channels
The number of mechanical contacts
Slightly simplifies the manufacturing process and increases reliability
It can also improve the performance.

[0016]

As described above, according to the rotary magnetic head device of the present invention, a circuit board for forming an electronic circuit is arranged between the rotary rotor and the magnetic head, and a spring contact provided on the circuit board is provided. By directly connecting the magnetic head, the rotating rotor and the circuit board, the electrical characteristics are good, the dedicated connection terminals are not required, and the manufacturing process can be simplified.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rotary magnetic head device according to an embodiment of the present invention.

FIG. 2 is an assembled perspective view of the rotary magnetic head device according to one embodiment of the present invention.

FIG. 3 is a diagram of an electronic circuit according to an embodiment of the present invention.

FIG. 4 is a top view and a side view of a spring contact according to an embodiment of the present invention.

FIG. 5 is a sectional view of a conventional rotary magnetic head device.

FIG. 6 is an assembled perspective view of a conventional rotary magnetic head device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotating drum, 2 ... Magnetic head, 4a ... Rotating rotor, 4b ... Fixed stator, 7, 10 ... Wiring board, 8 ...
Circuit board, 9 ... Spring contact, 11, 12 ... Connection pad, 1
3: Fixed drum.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Ryo Takagi, 336 Tatehara, Fuji City, Shizuoka Prefecture Inside Fuji Plant, Toshiba Corporation (56) References JP-A-4-48403 (JP, A) JP-A-3-157808 (JP) , A) JP-A-4-167201 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 5/02

Claims (2)

(57) [Claims] 1. A magnetic head mounted on a rotating drum, a first connection pad provided on the magnetic head, and fixed to the rotating drum to rotate integrally with the rotating drum.
A rotor of a rotating transformer, a second connection pad provided on the rotor, a first spring contact on one surface, and a second spring contact on the other surface.
Spring contact is provided and at least one of
An electronic circuit including an amplifier circuit is formed on the surface, and the first case is formed.
A contact is electrically connected to the first connection pad
And the second spring contact is connected to the second connection pad.
Contacting and electrically connected to the magnetic head
And the rotor are electrically connected via the amplifier circuit.
Circuit board attached to the rotating drum so that
And provided on a fixed drum so as to face the rotor.
A rotary magnetic head device comprising a rotary transformer status . 2. The apparatus according to claim 1, wherein the magnetic head is provided on the rotating drum.
Several amplifiers are provided, and a plurality of amplifier circuits are provided corresponding to the magnetic head.
Is, the more the circuit board, selecting cutting the plurality of amplifiers
Changeover switch and this changeover switch
A control circuit is provided for controlling, by means of one channel of said rotary transformer,
It transmits and receives signals to and from the magnetic head, and
Signal for controlling the control circuit on one channel of the lance
2. The rotary magnetic head device according to claim 1, wherein the rotary magnetic head device is configured to transmit a signal .