JP3172980B2 - Rotary magnetic recording 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 recording device having an improved structure for electrically connecting a core of a rotary transformer such as a rotary magnetic head device to a magnetic head .

[0002]

2. Description of the Related Art Conventionally, in a rotary magnetic recording apparatus, a rotary transformer has been used for exchanging signals between a magnetic head which is rotated and performs recording and reproduction and a fixed apparatus main body.

More specifically, in a rotary magnetic recording apparatus, a head fixed so as to slightly protrude around an upper drum which is a rotary drum, and a rotary head rotated in synchronization with the rotating upper drum The transformer core is connected, for example, as shown in FIG.

FIG. 3 is a sectional view showing a part of the rotary magnetic recording apparatus. As shown, a magnetic head 5 is fixed to the upper drum 1 which is a rotating drum. On the other hand, the substantially disk-shaped rotary transformer core 3 disposed below the magnetic head 5 rotates with the upper drum 1. The core 3 is opposed to the other (non-rotating) disk-shaped core 7, and the core 7 is connected to a device main body (not shown) of the rotary magnetic recording device. Each of the cores 3 and 7 constitutes a rotary transformer by mounting a predetermined coil (not shown) in a groove provided in the core.

Since the core 3 needs to be opposed to the core 7 with a predetermined gap, a relatively large distance L from the magnetic head 5 fixed to the lower surface of the upper drum 1 is required.
1 may be arranged.

Therefore, in such a case, the substrate 6 of the core 3
Is formed integrally with a cylindrical terminal portion 6a extending toward the upper drum 1, and this terminal portion 6a is formed in a hole 1 provided in the upper drum 1.
a. Further, on the back side of the upper drum 1, there is disposed a substrate 8 having a predetermined circuit pattern formed on the surface thereof. 8 is soldered to the surface.

On the other hand, a hole 1b different from the hole 1a is formed in the upper drum 1, and a cylindrical terminal portion 5a is inserted into the hole 1b. A lead portion, one end of which is soldered to the magnetic head 5, is passed through the terminal portion 5a. The lead portion is pulled out upward through the terminal portion 5a and passes through a through hole of the substrate 8. Are soldered to the surface of the substrate 8.

[0008]

However, in order to connect the core 3 and the magnetic head 5 with such a structure, it is necessary to provide a plurality of cylindrical terminals and a large number of soldering points. As the score increases,
A large number of connection points are required, and holes 1a and 1b must be formed in the substrate 8. Therefore, the connection structure is complicated, leading to an increase in cost, and the connection work is also complicated.

On the other hand, in FIG. 3, the distance L1 between the core 3 and the magnetic head 5 depends on the type of the rotary magnetic recording device.
Some are relatively small. In this case, since the space between the magnetic head 5 and the substrate 6 arranged on the core 3 is narrowed, a structure in which the magnetic head 5 and the substrate 6 are directly soldered is also conceivable.

However, in the structure of FIG.
Only when the size of the magnetic head 5 becomes smaller, the solder is filled between the lower surface of the magnetic head 5 and the upper surface of the substrate 6 and soldered. However, in this case, the viscosity of the solder to be used must be taken into consideration, or the narrow distance L1
Another problem arises in that it is difficult to insert the tip of the soldering iron between them.

In view of the above, it is an object of the present invention to provide a rotary magnetic recording apparatus capable of reducing costs due to parts and the like and increasing the efficiency of soldering work.

[0012]

According to the first aspect of the present invention, there is provided a rotary drum and a rotary drum having a lower surface.
The magnetic head having a head base and a head chip fixed to the peripheral portion , and the rotating drum and the fixed drum,
Rotary transformers fixed and opposed to each other
And a pair of cores for the lower surface of the head base.
With a narrow space between it and the conductive part
Place the transformer core board and
The side surface should be inwardly recessed in at least two steps.
Is slightly inside the conductive part of the head base.
The conductive part and the substrate are set so as to be positioned.
The end face, which is the side face, is connected by soldering.
Also , this is achieved by a rotating magnetic recording device.

[0013]

[0014]

According to the structure of the first aspect, the substrate is mounted on one of the cores for the rotary transformer, and the magnetic head is electrically connected to the side surface of the substrate, so that they can be directly soldered. You can do so. This eliminates the need for a large number of components such as a cylindrical terminal portion, and eliminates the need to provide many soldering locations. In addition, the conductive portion of the head base and the core substrate are narrow.
And the outer surface of the board
At least in two steps as an inwardly concave end face.
The surface is located slightly inside the conductive part of the head base
So that the conductive part and the side of the substrate
The end faces are connected by soldering. Toes
From the conductive part located on the outer periphery of the lower surface of the rotating drum.
The narrow space and inside, that is, inside, the conductive part
Insert a soldering iron under the rotating drum with the entire board edge
A depression suitable for immersion can be formed. Soshi
Therefore, solder is placed between the above-mentioned end surface, which is the side
By forming a bridge, the electrical connection between the substrate and the magnetic head
Connections can be made. Therefore, soldering iron,
As before, the conductive part of the head base and the top surface of the core substrate
Without the difficult work of plugging into the narrow space between
All you have to do is insert the iron into the recess,
Very easy.

[0015]

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. still,
Since the embodiments described below are preferred specific examples of the present invention, various technically preferred limitations are applied.
The scope of the present invention is not limited to these embodiments unless otherwise specified in the following description.

FIG. 1 is an enlarged sectional view showing a part of a rotary magnetic recording apparatus, and shows a preferred embodiment of a connection structure between a magnetic head and a rotary transformer core to which the present invention is applied.

In FIG. 1, reference numeral 11 denotes a lower portion of an upper drum constituting a rotary magnetic head device as a rotary magnetic recording device. In this embodiment, the upper drum 11 is a rotating drum, and the magnetic head 15 is fixed to the lower surface thereof. The magnetic head 15 includes a head base and a head chip attached to the tip of the head base. The head chip projects slightly outward from the outer peripheral surface of the upper drum 11.

On the other hand, reference numeral 13 denotes a substantially disk-shaped core constituting the rotary transformer, and this core 13 is adapted to be rotated with the rotation of the upper drum. This core 1
3 faces the other (non-rotating) disk-shaped core 17, and this core 17 is connected to a device main body (not shown) of the rotary magnetic recording device. And each core 13,
Reference numeral 17 is such that a predetermined coil is mounted in a groove provided in these cores to constitute a rotary transformer.

Further, a substrate 16 connected to the core 13 is disposed on the upper surface of the core 13. The substrate 16 is configured to have a relatively large thickness so that the distance L2 from the magnetic head 15 is sufficiently small. That is, since the distance between the magnetic head 15 and the core 13 is mechanically constant according to the type of the rotary magnetic recording device, the distance is adjusted by selecting the thickness of the substrate 16. Become. In the present embodiment, the interval L2 is, for example, about 2 [mm]. This is the magnetic head 15
And the substrate 16 is a space narrow enough to allow direct soldering.

Then, the conductive portion 15a provided near the tip of the head base of the magnetic head 15 and the conductive portion (connection portion) provided on the side surface which is the end surface of the substrate 16 are soldered.
9 and soldering. In the present embodiment, two solder locations are arranged in the depth direction of the drawing. As shown in the figure, when the solder 19 adheres, the solder 19 can electrically connect the conductive portion 15a formed on the lower surface of the magnetic head 15 and the side surface 16 of the substrate 16 with a sufficiently small interval L2. .

In this case, the lower surface of the magnetic head 15 and the upper surface of the substrate 16 are not soldered.
There is no need to insert the tip of the soldering iron between the narrow gaps L, and there is no need to use a special soldering iron, and the soldering operation is extremely simple.

Here, the core 13 used in this embodiment is
A preferred configuration example of the substrate 16 will be described. That is, for example, as shown in FIG.
The conductive portion (connection portion) formed on the side surface is composed of a first surface 22 which is recessed shallowly, and a second surface 23 which is further recessed subsequently. As a result, as described later, when the substrate 16 is formed, all the copper plating formed on the conductive portion does not come off, and at least remains on the second surface 23. Connection can be ensured.

The reason will be described in the process of manufacturing the substrate. As shown in the plan view of FIG. 2A, first, a through hole 21 having a shape as shown in FIG. Next, as shown in FIG. 2B, necessary circuit patterns are formed on the oblique lines on the front and back surfaces of the substrate 20.

Next, for example, copper plating is performed,
After forming the conductive portion on the inner surface of the substrate 1, the substrate is cut along the PP line. At this time, by the force applied by the cutting work,
There is a possibility that the copper plating on the first surface 22 in FIG. However, since the conductive portion remains on the second surface 23,
When the solder 19 shown in FIG.
The electrical connection between the substrate 16 and the substrate 16 is ensured.

Thus, in the present embodiment, by increasing the thickness of the core substrate, the distance between the substrate and the magnetic head can be made a predetermined narrow distance. It can be directly soldered, does not require many members for connecting them, and requires fewer soldering points. At this time, it is not necessary to consider special solder in terms of viscosity and the like.

Further, since the soldering is to adhere to the lower surface of the magnetic head and the side surface of the substrate, there is no need to insert a soldering iron between the magnetic head and the substrate, and the soldering operation is simple.

The shape of the side surface of the substrate 16 is not limited to that shown in the figure. For example, if the side surface of the substrate 16 is configured to be inclined downward and outward, the solder 19 is easily adhered, which is advantageous. .

[0029]

As described above, according to the present invention, it is possible to provide a rotary magnetic recording apparatus which can reduce the cost by reducing the number of parts and can also increase the efficiency of the soldering operation.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a connection structure between a magnetic head and a rotary transformer core to which the present invention is applied.

FIGS. 2A and 2B are diagrams sequentially illustrating a process of forming a substrate used in the connection structure of FIG. 1;

FIG. 3 is a schematic sectional view showing a connection structure between a conventional magnetic head and a core for a rotary transformer.

[Explanation of symbols]

 11 Upper Drum 13, 17 Core 15 Magnetic Head 16 Substrate 19 Solder

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 5/52-5/53 G11B 5/02

Claims (1)

(57) [Claims] 1. A rotating drum, and an outer portion of a lower surface of the rotating drum.
The magnetic head having a head base and a head chip fixed to the peripheral portion , and the rotating drum and the fixed drum,
Rotary transformers fixed and opposed to each other
And a conductive core provided on the lower surface of the head base.
Arrange the substrate of the rotary transformer core with the space between them
With the outer surface of the substrate inward in at least two steps
As a concave end surface, this end surface is the conductive base of the head base.
It is set so as to be located slightly inward from the portion, and the conductive portion and the end surface, which is the side surface of the substrate, are soldered.
A rotary magnetic recording device, characterized in that the rotary magnetic recording device is connected more .