JPH0991601A - Rotary drum device and recording or reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rotary drum device realizing the inexpensive and highly reliable connecting method between a head and a rotary transformer while contriving the miniaturization of the device. SOLUTION: The rotary drum 3 provided with the magnetic head 4 and a fixed drum 2 are arranged rotatably each other through a ceter shaft 5. The constitution is composed so that the signal recorded or reproduced by the magnetic head 4 against a magnetic tape wound onto the peripheral surface of the drum is transmitted through the rotary transformers 7a, 7b. The coil terminal part of the magnetic head 4 is soldered direct to one end side of a flexible printed circuit board 16, and also another end side of the flexible printed circuit board 16 is soldered to a circuit board of the rotary transformer 7a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording or reproducing apparatus such as a video tape recorder (VTR) or R-DAT, and in particular, a magnetic tape drawn out from a cassette is wound around a drum peripheral surface in a spiral shape. The present invention relates to a rotary drum device for recording or reproducing information on the magnetic tape.

[0002]

12 to 16 show an example of the structure of a conventional rotary drum device. In this rotary drum device 1,
A magnetic tape is spirally wound around a rotary drum having a magnetic head, a signal is recorded or reproduced on the magnetic tape by the magnetic head, and the signal is transmitted via a rotary transformer.

In the drawing, in a rotary drum device 1, an upper rotary drum 3 having a magnetic head 4 and a lower fixed drum 2 having a tape lead are coaxially rotatably arranged. The fixed shaft (center shaft) 5 is press-fitted into the fixed drum 2. The motor stator 6a is the motor pedestal 1
It is fixed to the fixed shaft 5 via 1. In addition, the motor rotor 6
b is fixed to the rotary drum 3. The head base 10 and the rotary transformer (stator) 7a are connected by a relay plate 8 having a metal leaf spring 8a. A printed circuit board 9 is connected to the rotary transformer (rotor) 7b, and signals are exchanged with the outside through the printed circuit board 9. The printed circuit board 9 extends to the outside of the drum device from a cutout 2a formed on the side surface of the fixed drum 2.

As shown in FIG. 14, the head base 1
On one surface (upper surface) of 0, the magnetic head 4 having the winding coil 13 is fixed by an adhesive 14. The printed board 1 is provided on the other surface (lower surface) of the head base 10.
2 is bonded (see FIG. 14C), and the winding coil 13 is soldered to one end 12a of the pattern of the printed board 12. Further, the other end 12b of the pattern of the printed board 12 comes into contact with the leaf spring 8a of the relay plate 8 (see FIG. 15B).

Here, the relay plate 8 is a molded component formed by insert molding a leaf spring 8a, and is bonded onto the rotary transformer 7a. Then, one end of the leaf spring 8a is electrically connected to the coil 15 of the rotary transformer 7a as shown in FIG.

[0006]

However, in the above-mentioned conventional example, in order to connect the magnetic head 4 and the rotary transformer 7a, the relay plate 8 of the molded component in which the plate spring 8a is inserted is necessary. For this reason, the cost of parts is increased, and it is difficult to secure the positional accuracy of the insert-molded leaf spring 8a.
There is a problem that a contact failure with the pattern of the printed circuit board 12 above 0 occurs.

In view of the above situation, it is an object of the present invention to provide a rotary drum device which realizes an inexpensive and highly reliable connecting method between a head and a rotary transformer while miniaturizing the device.

[0008]

In the rotary drum device according to the present invention, a rotary drum provided with a magnetic head and a fixed drum are rotatably arranged with respect to each other via a central axis, and are wound around a drum peripheral surface. In a rotary drum device configured such that a signal recorded or reproduced by the magnetic head on a tape is transmitted via a rotary transformer, a coil end portion of the magnetic head is directly connected to one end side of a flexible printed circuit board. And the other end of the flexible printed circuit board is soldered to the circuit board of the rotary transformer.

[0009]

According to the present invention, the magnetic head and the rotary transformer are connected via the flexible printed circuit board for relay. That is, the coil end portion of the magnetic head is directly soldered to one end side of the relay flexible printed circuit board, and the other end of the relay flexible printed circuit board is soldered to the wiring pattern of the rotary transformer circuit board. . By directly soldering the coil of the magnetic head and the relay flexible printed circuit board in this manner, the printed circuit board and the relay board on the head base are not required and the stability of electrical connection is improved. Further, by connecting the relay flexible printed circuit board and the rotary transformer circuit board by soldering, workability can be improved in the step of attaching the head base to the rotary drum and the step of incorporating the rotary transformer.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a rotary drum device according to the present invention will be described below with reference to FIGS. explain.

First, an example of the overall structure of a recording or reproducing apparatus equipped with the rotary drum device of the present invention will be described. 1 and 2, the recording or reproducing device 100 includes a rotating drum device 101. This rotating drum device 101
Is placed in place on the main chassis 102, while
A tape reel or the like is arranged on the slide chassis 103 configured to be slidable with respect to the main chassis 102 (see the double-headed arrow in FIG. 1). That is, in this example, the main chassis 102 and the slide chassis 103 have separate structures, and the tape cassette 200 mounted on the slide chassis 103 (cassette mounting member) is attached to the rotary drum device 101.
With respect to (respectively corresponding to the states shown in FIGS. 1 and 2).

Further, the recording or reproducing apparatus 100 includes a capstan 104, a capstan motor 105, a tape guide member 106 for pulling out a tape on the tape entrance side with respect to the rotary drum device 101, and a tape withdrawal on the tape exit side with respect to the rotary drum device 101. The tape guide member 107 and the like are provided.

As shown in FIG. 1, the tape loading operation of the recording / reproducing apparatus 100 is performed after the tape cassette 200 is mounted on the slide chassis 103, and then the tape guide members 106 and 107 are used to magnetically insert the tape cassette 200 from the opening 200a of the tape cassette 200. At the same time as the tape 201 is pulled out, the slide chassis 103 slides toward the rotary drum device 101. And
As shown in FIG. 2, the rotary drum device 101 has the opening 2
00a and the tape guide member 106
And 107, the magnetic tape 201 is wound around the peripheral surface of the rotary drum device 101. Thus, according to this recording / reproducing apparatus 100, recording / reproducing can be performed by causing the magnetic tape 201 to travel along a predetermined tape path.

Now, the rotary drum device 101 used in the recording or reproducing apparatus 100 according to the present invention outlined above.
Will be described in detail. 3 is a perspective view of the first embodiment of the present invention device, FIG. 4 is a top view of the first embodiment of the present invention device, and FIG. 5 is a cross-sectional view of the first embodiment of the present invention device.
In the rotary drum device 101 of the first embodiment, the upper rotary drum 3 having the magnetic head 4 and the lower fixed drum 2 having the tape lead are arranged coaxially. The fixed shaft 5 is press-fitted into the fixed drum 2. The motor stator 6 a is fixed to the fixed shaft 5 via the motor pedestal 11. The motor rotor 6b is fixed to the rotary drum 3.

FIG. 6 and FIG. 7 show an example of the structure around the magnetic head 4 and the rotary transformer 7a to be connected thereto in this embodiment. A magnetic head 4 having a winding coil 13 is bonded to the head base 10 with an adhesive 14. Flexible printed circuit board for relay (hereinafter referred to as FPC (flexible print circuit)) 1
6 is adhered to the head base 10. As shown in FIG. 6C, the pattern of the relay FPC 16 is soldered to the winding coil 13.

The other end of the relay FPC 16 is soldered to the circuit board 17 of the rotary transformer 7a as shown in FIG. The other end of the pattern of the circuit board 17 of the rotary transformer 7a is connected to the coil 15 of the rotary transformer 7a.
(FIG. 7 (A)) is soldered. As a result, the magnetic head 4 and the rotary transformer 7a are electrically connected. When soldering the relay FPC 16 and the circuit board 17, the soldering iron can be inserted from the notch 2a provided on the side surface of the fixed drum 2 to perform soldering easily and accurately.

By directly soldering the coil of the magnetic head 4 and the relay FPC 16 in this way, the printed circuit board and relay plate conventionally provided on the head base 10 are made unnecessary, and the structure is simplified. The stability of electrical connection can be improved. Further, by connecting the relay FPC 16 and the circuit board 17 of the rotary transformer 7a by soldering, workability can be improved in the step of mounting the head base 10 on the rotary drum and the step of incorporating the rotary transformer 7a.

8 to 11 show a second embodiment of the rotary drum device according to the present invention. This embodiment uses a so-called thin film head in which the coil of the magnetic head is formed by sputtering, plating or the like. Since the basic configuration of the rotary drum device is the same as that of the first embodiment, detailed description thereof will be omitted here.

FIG. 8 shows the structure around the head base according to the second embodiment, FIG. 9 shows the thin film head according to the second embodiment, and FIG. 10 shows the magnetic head and the relay FPC according to the second embodiment. FIG. 11 shows an example of the connection structure of the magnetic head and the rotary transformer in the second embodiment.

The thin film head 18 is adhered to a predetermined position of the head base 10 with an adhesive 14 as shown in FIG. Here, as shown in FIG.
Is configured to form a gap 20 by abutting two members 18a, 18b. Further, in FIG. 9, 19 is a magnetic material and 21 is a non-magnetic material. The thin film coil 22a is formed on the abutting surface of the member 18a, and the thin film coil 22b is formed on the abutting surface of the member 18b by sputtering or plating. Further, the thin film coils 22a and 22b have, in addition to these abutting surfaces,
It is also formed on the surface adjacent to the butt surface (the bottom surface portion of the thin film head 18 in FIG. 9).

The thin film head 18 is adhered to the head base 10 with the adhesive 14 as described above. Further, a counterbore is formed in the connection portion of the FPC 16 to the thin film head 18 in the head base 10 by the thickness of the relay FPC 16, and the relay FPC 16 is fitted exactly in this counterbore. This makes it possible to solder the terminal of the thin film coil 22 and the relay FPC 16 easily and accurately. The connection between the relay FPC 16 and the circuit board 17 of the rotary transformer 7a is performed in the same manner as in the case of the first embodiment.

[0022]

As described above, according to the present invention, the coil end portion of the magnetic head is directly soldered to one end of the relay FPC, and the other end of the relay FPC is connected to the rotary transformer circuit. By soldering to the substrate, there are advantages that the device can be downsized, the assembly workability can be secured, and a highly reliable rotary head device can be realized at a low cost. .

[Brief description of drawings]

FIG. 1 is a plan view showing an example of the overall configuration of a recording or reproducing apparatus equipped with a rotary drum device of the present invention.

FIG. 2 is a plan view showing an example of the overall configuration of a recording or reproducing apparatus equipped with the rotary drum device of the present invention.

FIG. 3 is a perspective view of a rotary drum device according to a first embodiment of the present invention.

FIG. 4 is a plan sectional view of a rotary drum device according to a first embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of the first embodiment of the rotary drum device of the present invention.

6A is a top view, FIG. 6B is a side view, and FIG. 6C is a bottom view showing the head base structure according to the first embodiment of the rotary drum device of the invention.

7A is a perspective view, FIG. 7B is a top view, and FIG. 7C is a side view showing the connection relationship between the head base and the rotary transformer according to the first embodiment of the rotary drum device of the present invention.

FIG. 8A is a top view, FIG. 8B is a side view, and FIG. 8C is a bottom view showing a head base structure according to a second embodiment of the rotary drum device of the invention.

FIG. 9 is a perspective view showing a magnetic head structure according to a second embodiment of the rotary drum device of the present invention.

FIG. 10 is a perspective view showing a connection structure of a magnetic head and a relay FPC in a second embodiment of the rotary drum device of the present invention.

11A is a perspective view, FIG. 11B is a top view, and FIG. 11C is a side view showing a connection relationship between a head base and a rotary transformer according to a second embodiment of the rotary drum device of the present invention.

FIG. 12 is a top view of a conventional rotary drum device.

FIG. 13 is a vertical cross-sectional view of a conventional rotary drum device.

14A is a top view, FIG. 14B is a side view, and FIG. 14C is a bottom view showing a head base structure relating to a conventional rotary drum device.

FIG. 15 is a perspective view showing a connection relationship between a head base and a rotary transformer in a conventional rotary drum device,
(B) is a top view.

FIG. 16 is a side view showing a connection relationship between a head base and a rotary transformer in a conventional rotary drum device,
(B) is a front view.

[Explanation of symbols]

 2 fixed drum 3 rotating drum 4 magnetic head 5 fixed shaft 6a motor stator 6b motor rotor 7a rotary transformer (stator) 7b rotary transformer (rotor) 10 head base 13 winding coil 14 adhesive 15 coil 16 relay FPC 17 circuit of rotary transformer Substrate 101 Rotating drum device

Claims (2)

[Claims] 1. A rotary drum having a magnetic head and a fixed drum are rotatably arranged with respect to each other via a central axis,
In a rotary drum device configured such that a signal recorded or reproduced by the magnetic head with respect to a magnetic tape wound around a drum peripheral surface is transmitted via a rotary transformer, a coil end portion of the magnetic head is directly A rotary drum device, characterized in that the flexible printed circuit board is soldered to one end side, and the other end side of the flexible printed circuit board is soldered to a circuit board of the rotary transformer. 2. A rotating drum device according to claim 1, which has a head for recording or reproducing information on a magnetic tape, and a cassette for storing the magnetic tape, wherein the cassette is mounted on the rotating drum. A cassette mounting member that supports the apparatus so as to be movable back and forth; and a tape guide member that pulls out the magnetic tape from the cassette and runs the magnetic tape along a predetermined tape path. Characteristic recording or reproducing device.