JPS599403Y2 - magnetic head - Google Patents

Description

[Detailed description of the invention] The present invention relates to a magnetic head for a tape recorder, and is particularly suitable as a magnetic head for a cassette tape recorder in which the magnetic head can be moved up and down to enable playback in a reciprocating direction. .

2. Description of the Related Art Generally, a tape recorder capable of recording or reproducing data in a reciprocating direction of a magnetic tape is known, in which a magnetic head is moved in the width direction of the tape as the running direction of the tape is reversed.

Additionally, a tape recorder using a cassette containing a tape is also known.

By the way, the well-known cassette requires a small magnetic head because the magnetic head is inserted through a window formed in the cassette and brought into contact with the tape.

In such a cassette player recorder, a smaller magnetic head is required to move the magnetic head in the width direction of the tape for reciprocal playback of the tape. The tape contact surface of the magnetic head needs to have a sufficient surface (length in the tape width direction) to the extent that the magnetic tape does not come off the tape contact surface of the magnetic head even when the magnetic tape moves in the tape width direction.

Therefore, in such a magnetic head, it is not only difficult to store the tape contacting part having a sufficient tape contacting surface in the shield case, but also the core and tape contact part including the tape contact part can be accessed from the back opening of the shield case. The core holder cannot be inserted, and the core and core holder must be inserted through the front opening of the shield case.

If the core and core holder are inserted from the front surface of the shield case (the surface on the tape running side), a large opening is required in the front surface, resulting in insufficient shielding effect.

The present invention eliminates the above-mentioned drawbacks and makes it possible to insert a core and a core holder including a larger tape contact part from the front side of the shield case through the rear opening of the shield case, The front opening of the shield case can be made relatively small, and therefore a sufficient shielding effect can be obtained.

That is, in the present invention, a tape contacting part having a length equal to or longer than the width direction of the magnetic tape is fixed to the corresponding contacting part, and at least the vicinity of the corresponding contacting part is in contact with the tape in the tape width direction at the corresponding contacting part. A core holder configured to be shorter than the length of the tape in the width direction of the tape, a core held by the holder and including the operating gap part, and a shield case housing the core holder and the core, The tape width direction inside the vicinity of the opening from which the tape abutting portion protrudes is configured to be shorter than the length of the tape abutting portion in the tape width direction, and the tape contacting portion is adjacent to the opening from which the tape abutting portion protrudes in the shield case. A cut arrow part through which the tape abutting part can be inserted is provided, and an elastic member for closing the cut arrow part is fixed to the tape abutting part, and the elastic member biases the holder to temporarily attach the holder to the shield case. It was designed to stop it.

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

In the figure, reference numeral 1 denotes a tape abutting part, in which the tape abutting surface is shaped, chip cores 2a and 2b having an operating gap, and a glass 3 is placed between these chip cores.
It consists of a shield core 4 which is interposed and bonded via a wear-resistant member consisting of A and 3B, and ferrite pieces 6a and 6b which are bonded and fixed via glasses 5a and 5b, and the tape contact surface 7 is used for reciprocating the tape. It has a sufficient length in the width direction of the tape so that it does not come off the tape even when the magnetic head is moved up and down in response to switching.

8 is a frame made of an elastic member such as resin, and a protrusion 26
are integrated.

A core holder 9 is made of a non-magnetic material and has a window 11, a spring insertion groove 12, a hook portion 13, and the like.

14a and 14b are body cores, and these cores are inserted into separate bobbins 16 each having a coil 15 wound thereon together with non-magnetic spacers 17a and 17b and flexible printed boards 18a and 18b.

The ends of the coil 15 are connected to the conductive parts of the printed boards 18a and 18b, respectively.

The spacers 17a and 17b have protrusions 19a and 17b, respectively.
19b, these are cores 14a, 1 as described later.
When 4b is inserted into the holder 9, it comes into contact with the inner wall of the holder 9.

Reference numeral 20 denotes a shield case, which, as will be described later, is provided with an opening 21 from which the tape contacting portion 1 projects, followed by a notch 22 through which the corresponding contacting portion can be inserted.

The above-mentioned spacer 17b is attached to the mounting edge 23 of the window 11.
The core 2b inserted into the frame 8 of the tape contacting part 1 is placed on the core 14b, and the core 1 is placed on the core 2a.
4a and the pressing plate 24, inserting the spring 25 from the groove 12, hooking the spring 25 to the hook part 13, and pressing the pressing plate 24 with the spring, so that the core 2a and 1
4a, cores 2b and 14b are joined, and cores 2a, 2b, 14a, 14b have the tape contact portion 1;
The core holder 9 is mechanically coupled, and the frame 8 is interposed and supported between the tape contact portion 1 and the holder 9.

The tape abutting portion 1 side of the blocks combined as described above is inserted through the rear opening of the shield case 20.

Although the vicinity of the opening 21 of the shield case 20 is smaller than the length of the abutting part 1 in the tape width direction, the abutting part 1 also passes through the notch 22 following the opening 21, and the abutting part 1 is connected to the second
As shown in the figure, the notch 22 protrudes from the shield case 20, and in this protruding position, the protrusion 26 is fitted and closed, and the protrusion 26 abuts against the edge 27 of the notch 22. The frame 8 and the block to which the frame is fixed are biased, and the holder 9 is elastically pressed against the inner wall of the shield case 20, and the block is temporarily fixed to the shield case 20 by this pressing.

In this state, insert a screw through the hole 28 etc. and mount the holder 9.
screw onto the case 20.

In addition, Suhesa 17a, 17b Hakoa 14a, 14
Slightly smaller than b, and "burr" in holder 9
Alternatively, it is desirable to avoid rounded portions at corners.

As described above, the present invention includes a head core operating gap portion and a wear-resistant member, and a tape contact portion 1 having a length in the tape width direction at least equal to the width of the magnetic tape, and a tape contact portion 1 fixed to the corresponding contact portion 1. , a core holder 9 in which at least the vicinity of the corresponding contact part 1 side is shorter in the tape width direction of the corresponding contact part 1 than the length of the corresponding contact part 1 in the tape width direction, and a shield that houses these core holders 9 and the core. case 20
and the tape contact portion 1 of the shield case 20.
The length of the tape in the tape width direction inside the vicinity of the opening 21 from which the tape protrudes is shorter than the length of the tape contact portion 1 in the tape width direction, and following the opening 21 there is a cutout portion 22 into which the tape contact portion 1 can be inserted. An elastic member is fixed to the tape contact portion 1 to close the cutout portion 22, and the holder 9 is urged by the elastic member to temporarily fix the holder 9 to the shield case 20. Therefore, the front opening of the shield case 20 can be made relatively small, and a sufficient shielding effect can therefore be obtained.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is a vertical side view, Fig. 3 is a longitudinal rear view taken along the line A-A showing the main parts, and Fig. 4 is a perspective view showing the shield case. FIG. 5 is a perspective view showing the completed state. 1...Tape contact part, 2a, 2b...
Core, 9...Core holder, 14a, 14b...
... Core, 20 ... Shield case, 21
...Opening, 22...Notch.

Claims (1)

[Scope of utility model registration request] A tape abutting part that includes the operating gap part of the head core and a wear-resistant member and has a length in the tape width direction that is at least longer than the width of the magnetic tape; A core holder configured to be shorter in the tape width direction of the relevant contact part than the length of the relevant contact part in the tape width direction, and a shield case that stores these core holders and the core, and the tape contact of the shield case is provided. The tape width direction inside the vicinity of the opening from which the contact portion projects is configured to be shorter than the length of the tape contact portion in the tape width direction, and a cut arrow portion through which the tape contact portion can be inserted is provided following the opening; In addition, the above-mentioned notch is provided in the above-mentioned tape contact area. The magnetic head is configured such that an elastic member that closes the portion is fixed, and the holder is biased by the elastic member to temporarily fix the holder to the shield case.