JPS626402A - Rotary head type magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the operability and reliability of the titled device by providing the device with an electromagnetic conversion member, a drum unit and an amplifier unit. CONSTITUTION:A magnetic head 2 is connected to a printed board 19 through a rotary transformer built in an upper drum 1 or lower drum 6 and a fixed transformer and then connected to a head amplifier unit 11 though connectors 20, 21 and a signal transmission system is connected between the magnetic head 2 and the head amplifier unit 11 to record/reproduce video signals. Consequently, the rotary head type VTR having high operability and reliability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to rotary head type magnetic recording and reproducing devices such as video tape recorders.

In a conventional rotary head type magnetic recording/reproducing apparatus (hereinafter abbreviated as VTR), when the magnetic head amplifier circuit is connected in close proximity to the drum unit, bonding is performed by the following method. The conventional VT described above will be explained below with reference to the drawings.
An example of R will be explained.

FIG. 3 shows an exploded perspective view of a rotary head cylinder portion of a conventional VTR. In FIG. 3, 1 is an upper drum, and 2 is a magnetic head, which is arranged on the upper drum 1.

3 is a disk, 4 is a rotating transformer forming a rotating element of the electromagnetic conversion member, and 5 is a number 7. 6 is a lower drum, and 7 is a fixed transformer forming a fixed element of the electromagnetic conversion member. 8 is a sheet metal whose surface is coated with an insulating coating, and is further covered with copper foil. 9 is a head amplifier printed board (hereinafter referred to as Henodoang P board); 10 is a toe for connecting the metal plate 8 and the head amplifier P board 9; Here, the disk 3 is fixed to a shaft 5, a rotary transformer 4 is adhered to the disk 3, and an upper drum 1 is removably fitted. The shaft 5 is supported by a lower drum 6 and an upper drum 1. Di2232 rotation transformer 4
can rotate together. Further, the rotating transformer 4 and the fixed transformer 7 face each other without contacting each other.

Further, the metal plate 8 is fixed to the lower drum 8iC, and furthermore, the head amplifier P plate 9 is fixed to the metal plate 8 by a hole 1o.

The operation of the conventional VTR configured as described above will be explained below.

First, the magnetic head 2 is connected to the rotary transformer 4 by an appropriate means, and the fixed transformer 7 and the head amplifier plate 9 are connected through a copper foil (not shown) K on the metal plate 8. A transmission path for signals exchanged between the magnetic head 2 and a magnetic tape (not shown) is constructed between the magnetic head 2 and the head amplifier P board 9, and records and reproduces video signals.

Problems to be Solved by the Invention However, in the above configuration, when adjusting the head amplifier P board 9, it is necessary to adjust the head amplifier P board 9 while it is connected to the fixed transformer 7. Since the lower drum 6 and the like are located close to each other, there is a risk of damaging the surfaces thereof or damaging the magnetic head 2. Furthermore, the workability is poor, and since the head amplifier P plate 9 is fixed to the metal plate 8 with eyelets 10 during replacement, it is extremely difficult to remove the head amplifier P plate 9, and there is no interference from outside. It also had the problem of being weak to signals because the circuit was in an exposed state.

In view of the above-mentioned problems, the present invention provides a rotary head type magnetic recording/reproducing device in which the above-mentioned problems are solved by configuring the head amplifier unit to be connected by a connector.

Means for Solving the Problems In order to solve the above problems, the rotating head type magnetic recording/reproducing device of the present invention has an electromagnetic transducer having a magnetic head, and a rotating transformer and a fixed transformer for transmitting and receiving signals to and from the magnetic head. a drum unit including a printed board to which the fixed transformer is connected, a holder for supporting the printed board, and a first connector coupled to the printed board; and a signal to be applied to the magnetic head or the magnetic head. a second connector connected to a circuit for processing signals from the first connector and removably coupled to the first connector;
The amplifier unit includes an amplifier unit having a connector, and a fixing member that supports the amplifier unit.

Effect of the Invention With the above-described configuration, the present invention allows the head amplifier unit to be easily connected, thereby eliminating the need to damage the drum unit during manufacturing or servicing, improving workability, and facilitating service replacement. It can also be made resistant to interference signals from outside.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of one embodiment of the present invention, and FIG.
The figure is also an exploded side view of the main parts, taken from the direction of arrow A in Figure 1.

In FIG. 1, 11 is a head amplifier unit;
The outside is covered with a shield plate, and protrusions 1 are provided at both ends of the shield plate.
2.13. 14.15 is a screw, 16
and 17 are fixing members.

Furthermore, 18 is a holder, 19 is a printed board, and 20 is a connector.

In FIG. 2, 21 is a connector, which can be connected to the connector 20 described above. Here, the holder 18 is fixed to the lower drum 6, a print board 19 is fixed on the holder 18, and a connector 20 is fixed on the printed board 19. Note that copper foil (
(not shown) is arranged and connected to a fixed transformer (not shown) built in the lower drum 6, and the copper foil and the connector 20 are similarly connected. Further, as shown in FIG. 2, the head amplifier unit 11 includes a connector 21 connected to an internal circuit at its lower part, and the connector 21 is connected to a connector 2o. Further, the head amplifier unit 11 has protrusions 12 and 13 at both ends thereof.
are fixed to fixing members 16 and 17 with screws 14 and 15, respectively, and are in a stable state at an appropriate position. Here, the fixing member j6.17, like the lower drum, is fixed to the main body (not shown) by suitable means, such as screws (not shown).

The operation of the VTR of this embodiment configured as described above will be explained below.

First, like the conventional example, the magnetic helad 2 is connected to the printed board 19 via a rotary transformer and a fixed transformer (both not shown) built in the upper drum 1 or the lower drum 6, and is further connected to the printed board 19 through the connector 2o and the fixed transformer (both not shown). 21, a signal transmission path is constructed between the magnetic head 2 and the head amplifier unit 11, and video signals can be recorded and reproduced. Note that the head amplifier unit 11 can be further connected to a signal processing circuit (not shown) using appropriate means, for example, another connector (not shown).
It is connected to the.

Here, regarding the fixing members 16 and 17, even if it is necessary to tilt the head amplifier unit 11 according to the inclination of the lower drum θ, the shape can be adjusted relatively easily, and the shape is not limited to the shape of this embodiment. You can decide. ) Also, an integrated structure is also possible instead of a plurality of devices as in this embodiment.

As described above, the present invention has excellent workability and is relatively simple.
Moreover, it is possible to realize a rotary head type VTR that is inexpensive and highly reliable, and to obtain a great effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts of an embodiment of the present invention, and FIG.
FIG. 1 and FIG. 3 are exploded perspective views of the main parts of a conventional rotary head type magnetic recording/reproducing device. 11...--head amplifier unit), 16.17--
...Fixing member, 20.21-...Connector. Name of agent: Patent attorney Toshio Nakao and one other personfδ
--Furuda 149--Bushiboku 4shi [20--1 also lid

Claims (1)

[Claims] a magnetic head; an electromagnetic transducer having a rotating transformer and a fixed transformer for transmitting and receiving signals to and from the magnetic head; and a printed board to which the fixed transformer is connected;
a drum unit including a holder for supporting the printed board; a first connector coupled to the printed board; and a drum unit connected to a circuit for processing signals given to or from the magnetic head; 1st
1. A rotary head type magnetic recording/reproducing device comprising: an amplifier unit having a second connector detachably connected to the connector; and a fixing member supporting the amplifier unit.