JPH0227723B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head, and more particularly to a magnetic head constructed by incorporating a magnetic head element into a case.

The structure of a conventional magnetic head of this type is shown in FIGS. 1 and 2. In both figures, the reference numeral 1 denotes a case made of synthetic resin, into which a magnetic head element 2 is fitted through a rear opening 1a.
The magnetic head element 2 has a ring-shaped magnetic core 2a, and a non-magnetic spacer 3 is fitted between the tips of the ring-shaped magnetic core 2a to form a magnetic gap. A coil bobbin 5 around which a coil 4 is wound is fixed to the rear end of the ring-shaped magnetic core 2a. An external terminal 6 is integrally buried in one end of the coil bobbin 5. The magnetic head body 2 having such a structure has, for example, stacked plate springs 7 made of non-magnetic material bent in a chevron shape, and is arranged in the rear end opening 1a of the case 1.
The case 1 is inserted into the case 1, and a liquid synthetic resin is injected and hardened to integrate it with the case 1. As shown in FIG. 2, a fitting part 1b formed on the side surface of the case 1
A magnetic head 9 is obtained by fitting and fixing a tape guide 8 therein.

In this way, the magnetic head 9 may be used to perform cue reproduction of a program or the like recorded on a magnetic tape by fast forwarding or rewinding the tape.
When running a magnetic tape at high speed in this way, the magnetic tape generally has a base material made of a synthetic resin film such as polyester, and the cassette in which this magnetic tape is housed is made of synthetic resin. However, the case 1 (electrical insulator) made of synthetic resin of the magnetic head 9 is charged with static electricity, resulting in an electrostatic nozzle.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional magnetic head.The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional magnetic head. is intended to provide.

In order to achieve the above object, in the present invention, a metal member made of non-magnetic metal is fitted together with the magnetic head element in the case, one end of this metal member is exposed to the sliding surface of the magnetic head, and the other end is exposed to the sliding surface of the magnetic head. A structure was adopted in which the ground terminal was made to protrude outward from the rear end of the case.

The details of the present invention will be explained below based on embodiments shown in the drawings.

3 to 5 illustrate one embodiment of the present invention, and in each figure, the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals, and their explanation will be omitted.

In this embodiment, as shown in FIG. 3, a metal plate 10 made of a non-magnetic thin plate is installed in the case 1 together with the magnetic head element 2.
This metal plate 10 made of non-magnetic metal has a relatively wide protrusion 10a facing the magnetic tape sliding surface at its tip, and an external terminal 6 at its rear end.
Similarly, a ground terminal 10b protruding from the rear end of the case 1 is integrally formed. A plate spring portion 10c is integrally formed in the center of the metal plate 10 and is bent upward into a chevron shape. The metal plate 10 having such a structure is inserted into the rear end opening 1 of the case 1 together with the magnetic head element 2.
They are fitted starting from a, and resin is injected and hardened to integrate them. As shown in FIG. 4, the case 1 made of synthetic resin has a notch in which the protrusion 10a on the tip side of the metal plate 10 is exposed above an opening 1d in which the magnetic core 2a formed at the tip is exposed. 1e is formed, and a protrusion 10 is formed in this notch 1e.
a is fitted.

Therefore, the protrusion 10a of the metal plate 10 is exposed on the sliding surface side of the magnetic head together with the magnetic core 2a, picks up the generated static electricity, and connects the ground terminal 10.
b can be released to the outside.

By using the magnetic head obtained in this way, the static electricity generated when the magnetic tape is slid at high speed can be led to the outside through the metal plate 10 and grounded, thereby reducing static noise. It is possible to obtain a magnetic head free from this.

The ground terminal 10b may have a structure in which it is connected to an external ground wire, but as shown in FIG. 5, a ring-shaped attachment part 10d is further formed at the tip of the ground terminal 10b. If a structure is adopted in which the case 1 is fixed using the ring-shaped mounting portion 10d together with a screw (not shown) that is screwed into the through hole 1g of the leg 1f that fixes the case 1 to the device side, the case 1 can be grounded immediately to the chassis side. It is possible to create a connection structure that does not require work such as soldering.

Note that the metal plate 10 has a leaf spring portion 10c in the middle thereof.
Since it is integrally formed, there is no need for a leaf spring as a separate member, which simplifies the assembly process and reduces the number of parts.

Of course, the leaf spring may be provided separately.

As is clear from the above description, according to the present invention, a metal member is provided which is mounted in the case together with the magnetic head element, one end of which faces the magnetic tape sliding surface, and the other end of which is used as a ground terminal. Since it has a structure that protrudes outward from the case, the static electricity generated when the magnetic tape runs at high speed can be guided to the ground terminal side using this metal member and released to the outside, so it is called an electrostatic nozzle. It is possible to obtain a magnetic head that does not cause the occurrence of

[Brief explanation of drawings]

1 and 2 are an exploded perspective view and an assembled perspective view illustrating a conventional structure; FIGS. 3 and 4 are an exploded perspective view and an assembled perspective view illustrating an embodiment of the present invention; FIG. 5 is a perspective view illustrating another embodiment of the present invention. 1...Case, 2...Magnetic head element, 2a...
...Ring-shaped magnetic core, 10...Metal plate, 10a...
...Protruding part, 10b... Earth terminal, 10c... Leaf spring part.

Claims (1)

[Scope of Claims] 1. In a magnetic head in which a magnetic head element is fitted into a case and integrated, a metal member made of a non-magnetic material is fitted together with the magnetic head element, and the magnetic head is inserted in the middle of the metal member. A leaf spring part that presses the element body against the case is integrally formed, and one end of this metal member faces the magnetic tape sliding surface side, and the other end serves as a ground terminal and protrudes toward the rear of the case. A magnetic head characterized by: 2. A connecting portion is provided on the ground terminal side of the metal member, and the connecting portion is configured to be fixed together with the case to the chassis side of the magnetic recording/reproducing device. magnetic head.