JPS5932036Y2 - composite magnetic head - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a composite magnetic head for recording and reproducing in cassette tape recorders and the like.

Generally, this type of composite magnetic head consists of a chip core for recording and a chip core for playback that are arranged along the scanning direction of the recording medium and are fixed to the same holder and integrated, and each of these chip cores has its own coil. A composite magnetic head is conceivable, which includes a joining means for joining separate body cores each having a body core wound thereon.

The present invention is to ensure the bonding between the chip core and the body core in the above-described composite magnetic head, and to prevent unnecessary distortion from being applied to the chip core and the like.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is a chip block, and this block consists of a recording chip part 2 and a reproduction chip part 3, and the recording chip part 2 and the reproduction chip part 3 are completely integrated as a chip block 1. ing.

Further, these are arranged along the running direction of the magnetic tape.

The recording chip section 2 and the reproducing chip section 3 are substantially the same except for the difference in the operating gap, which will be described later, so only the reproducing chip section will be described in detail here.

The playback chip section 3 has a chip core 4 for the stereo left channel and a chip core 5 for the right channel, and these chip cores 4 and 5 each have a playback operating gap (
(narrower than the working gap for recording).

A shield core 8 sandwiched between the glass plates 6 and 1 in a sandwich-like manner is interposed between the chip cores 4 and 5.
The playback chip section 3 consisting of the shield core 8, the glass plate 6°I, and the chip cores 4 and 5, and the recording chip section 2 marked @ are held by the same holder 9 made up of stacked glass plates. .

10 is a body core, a coil 11 is wound around the core, and a substantially ring-shaped core is completed by joining it to the chip core 4 mentioned above.

12 is a body core similar to the body core 10, and is joined to the chip core 5.

Numerals 13 and 14 are body cores similar to the body core 10 described above, and are joined to the chip core of the recording chip section 2.

The means for joining the chip cores 4, 5 and the body core 10.degree. 12 consists of a joining frame 15 and a spring 16, and the chip cores 4, 5 and the body core 10 are connected at the position where the body cores 10, 12 and the chip core 4.5 overlap. .1
2 are biased in one direction by the spring 16 inserted into the joint frame 15, and the chip core 4.5 and the body core 10.12 are pressed by the spring (elastic member) 16 via the spring receiving member 28. is received by the joint frame 15, and this receiving member is constituted by a protrusion 17 projecting from the joint frame 15.

Further, the chip core and body core 13.14 on the recording chip section 2 side were also joined by a joining frame 18 similar to the joining frame 15 described above, and the joining frames 15 and 18 were bonded back to back with a copper plate 19 interposed therebetween. The case 24 is connected to the case 24 through a U-shaped shield plate 20.21 and another U-shaped shield plate 22.23.
is screwed to.

In this way, the joint frames is and is are integrally connected via the case 24, and therefore the recording side and the reproduction side of the receiving member consisting of the protrusion 1T are integrally constructed.

In the joint frames 15 and 18 described above, the chip core and the body core are received by the receiving members each consisting of a single protrusion 17, so for example, the shield plates 20 and 21 interposed between the joint frame 15°18 and the case 24, 22 and 23 are not constant, or the joining frames 15 and 18 have different machining dimensional accuracy or the protrusion 17 has a different height, or the thickness of the recording chip part 2 and the playback chip part 3 is different. Even if the recording body core 10 and the playback body core 13 have different thicknesses, the chip block 1 and the body core can rotate around the contact portion with the protrusion 11 via the receiving plate 25. There is no risk of applying unnecessary strain to the chip core and body core and deteriorating the magnetic properties.

If the joint frame 15° 18 has two protrusions each for receiving the chip block 1 and the body core via the receiving plate 25, the integrated chip block 1 will have four integrated chip blocks 1. Since the contact surfaces of these four projections are not the same, some projections may not come into contact with the chip block 1 and the body core, and may not be forced into contact with the chip block 1 and the body core by the pressure of the spring 16. Since they tend to come into contact with each other, strain is applied to the chip core and body core.

In addition, 26 is a terminal board, and the terminal of the said coil 11 is connected via the printed board 27.

Since the present invention is constructed as described above, the chip core in the recording chip section 2 and the chip core in the playback chip 3 are disposed along the scanning direction of the recording medium and fixed to the same holder 9, and Each separate body core 10 has a respective coil 11 wound around a chip core.
, 12, 13° 14, the joining means is configured to connect the chip core and body core 10, 14 at a position where the chip core and body core 10, 12, 13, 14 overlap.
2, 13, 14 in one direction (the direction in which the protrusion 17 is located), such as an elastic member such as a spring 16, and the chip core and body core 10, 12, 13 degrees that contain the elastic member and are pressed by the elastic member. 14 and separate joint frames 15 and 1B for playback and recording, each having a protrusion 17 for receiving the connection frame 14,
The joint frames 15 and 18 are substantially integrally connected to the playback chip core and body core 10.12 and the recording chip core and body cores 13 and 14 through the same case 24 so as to be able to rotate respectively. With this structure, the chip core and the body core can be reliably joined, and unnecessary distortion can be prevented from being applied to the chip core.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts showing an embodiment of the present invention;
The figures are an exploded perspective view showing an embodiment of the present invention, FIG. 3 is a longitudinal side view, and FIG. 4 is a longitudinal front view taken along the line A--A. 2: Recording chip part, 3: Playback chip part, 4° 5: Chip core, 9: Holder, 10, 12, 13° 14: Body core, 11: Coil, 15, 18: Joint frame, 16: Spring, 24 :Case.

Claims (1)

[Scope of utility model registration request] For joining recording chip cores and playback chip cores arranged along the scanning direction of the recording medium and fixed to the same holder, and separate body cores each having a coil wound around these chip cores. In a composite magnetic head, the joining means includes an elastic member that biases the chip core and the body core in one direction at a position where the chip core and the body core overlap;
It consists of a separate joint frame for playback and recording, which has a built-in elastic member and a protrusion that receives the chip core and body core pressed by the elastic member, and the joint frames are connected to the chip core and body core for playback, and the body core, respectively, for recording. 1. A composite magnetic head characterized in that a chip core and a body core are substantially integrally constructed through the same case so as to rotatably receive each.