JPS6236718A - Rotating magnetic head device - Google Patents

Abstract

PURPOSE:To improve the assembling operability of a rotary magnetic head device by unifying a male contact with a polymer member by changing the length of said contact for each channel of the magnetic head and attaching the polymer member to a rotary transformer. CONSTITUTION:A female contact 3 is attached to a rotary cylinder 2 for connection with a rotary magnetic head 1 and then stored in a housing 10 made of a polymer material. An end part 3'' at the other side of a contact part 3' of the contact 3 is connected electrically to a terminal part 1' of the head 1 by soldering 8. While the polymer member 11 set over a rotor 4 contains a male contact 7 connected electrically at an end by soldering 9 with the other end connected electrically to the contact 3 respectively. Here the contact 7 has the larger length than another male contact 7 in the form of a pair of terminals. Thus the contact 7 can be easily put into the contact 3 and also the length of the contact 7 can be changed for each channel.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rotating magnetic head device for a magnetic recording/reproducing device such as a video tape recorder, and relates to an electrical connection means between the magnetic head and a rotating transformer. be.

[Background of the Invention] - As described in Japanese Utility Model Application Publication No. 59-59427, a conventional device attaches a printed circuit board to the opposite surface of a rotating cylinder to the surface on which the magnetic head is provided, and connects the magnetic head with a conductive wire. Was. However, in such a device, the conductor from the rotary transformer is also connected to the printed circuit board, so f
l) The conductor wire that transmits the ultra-weak signal from the LA air head becomes longer, making it susceptible to externally induced noise. (2) The number of solders required for connection is large and workability is poor. (If the magnetic head wears out, it must be replaced for each rotating cylinder, but
Many soldered parts must be removed during replacement. )
There were other problems.

[Purpose of the invention]

An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional examples and to improve assembly workability.

[Summary of the invention]

The present invention provides a connection between a magnetic head and a rotating transformer.
By using a male contact (plug) and a female contact (connector) without relaying the printed circuit board, the connection length is shortened, making it less susceptible to externally induced noise, and improving assembly workability. It is something to do. In particular, rather than changing the length of the male contact, the insertion force is dispersed, and even if the number of contacts increases due to multiple channels, the insertion force does not increase much.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. 1st
The figure is a top plan view of the rotary magnetic head device of the present invention, and FIG. 2 is a sectional view of the main part of FIG. 1 AOB.

In FIGS. 1 and 2, 2' indicates a fixed cylinder (lower cylinder), 2 indicates a rotating cylinder (upper cylinder) attached to the rotating shaft 5 via a fixed member (disk) 6,
A rotating magnetic head 1 is attached to the cylinder as shown.

4' is a stator attached to the fixed cylinder 2';
is a rotor of a rotary transformer disposed opposite to the stator 4' and attached to the fixed member 6 via the polymer member 11. The rotating cylinder 2 has a rotating magnetic head 1.
A female contact 6 for connection with is attached, and this female contact is housed in a housing 10 made of a polymeric material. The other end 3'' of the contact portion 3' of the female contactor 3 is electrically connected to the terminal portion 1' of the magnetic head 1 by brazing 8. A polymer member 11 located on the upper part of the rotor 4 A male contact 7 is provided, one end of which is electrically connected by brazing 9 and the other end of which is electrically connected to the female contact 5.

Fig. 3 is a plan view of only the rotating part with the rotating cylinder 2 removed (in Fig. 2), and Fig. 4 is a cross section of C (JD) in Fig. 5. A shaped contactor 7 is attached to the surface of the polymer member 11 opposite to the rotor 4 in parallel to the rotating shaft 5.
Terminals 4C of 4a and 4b are connected to a part of the male contact 7 by brazing 9 through a cut 11a in the outer diameter portion of the polymer member 11.

In this embodiment, one male contactor 7 of a pair of two terminals is used.
The other male contact 7' is short and inserted into the female contact 5. Of course, the length of the contact may be changed for each channel.

〔Effect of the invention〕

According to the present invention, external conduction noise can be improved by 6CfB to 10d, making it difficult for interference to occur especially in strong electric field areas near medium wave broadcasting transmitting stations. Furthermore, since the number of soldering connections is greatly reduced, assembly work efficiency is improved, and a highly reliable rotating magnetic head device can be provided. In particular, with the present invention, a strong force is required when inserting the contact, but since the length of the male contact is different, the force can be dispersed, reducing the maximum insertion force and improving assembly work. can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a top plan view of a rotating magnetic head device showing an embodiment of the present invention, FIG. 2 is an AOB sectional view of FIG. 1, FIG. 5 is an internal plan view thereof, and FIG. It is a COD sectional view. DESCRIPTION OF SYMBOLS 1... Rotating magnetic head, 1'... Terminal part of the rotating magnetic head 1, 2... Rotating cylinder, 6... Female contact, 3'... Contact part of the female contact 3 , 6″...Other end of 3′, 4...
Rotary transformer rotor, 4a, 4b... Rotary transformer rotor winding, 4C.
... Terminals of 4a and 4b, 5... Rotating shaft, 6...
Fixing member, 7...male contact, 7'...
・Male contactor, 9... Number of wax parts, 10...
Housing, 11... Polymer member, 11a...
- Cutting on the outer diameter of the polymer member 11. Representative Patent Attorney Katsuo Ogawa - Tsumugi 1rw 20th 3rd Ro 40th

Claims (1)

[Claims] 1. A rotary cylinder equipped with a magnetic head and a rotary transformer equipped with a winding for signal transmission, and one of the male contact and the female contact is connected to the rotary cylinder or In a rotating magnetic head device, the male contact is attached to a rotating transformer, and the other is attached to the rotating transformer or the rotating cylinder, and the two types of contacts provide electrical continuity between the magnetic head and the rotating transformer. The length of the child,
A rotary magnetic head device characterized in that the magnetic head channel is integrally molded with a polymer member, which is different for each magnetic head channel, and the polymer member is mounted on the rotary transformer. 2. The above-mentioned male contacts are made into a pair of two terminals for each magnetic head, and the male contacts, which are integrally molded with a polymeric member by changing the lengths of the two terminal contacts, are attached to a rotating transformer core. A rotary magnetic head device according to claim 1, characterized in that: