JPS6236720A - Rotary magnetic head device - Google Patents

Abstract

PURPOSE:To prevent the stress strain produced at the soldered parts of the female and male contacts by having an approximately U-shaped, S-shaped or M-shaped female or male contact in the thickness direction of a material plate at the part near the soldered area between the female or male contact and a magnetic head set on a rotary cylinder. CONSTITUTION:A rotary magnetic head member 1 is attached to a rotary cylinder 2 via a screw 15 and a female contact 3 is fixed into a housing 10 to be incorporated to the cylinder 2. A printed board 14 is attached to the magnetic head 1 to secure the electrical connection and soldered at a soldered part 3'' of the contact 3. The part 3'' is set outside the housing 10 and a U-shaped form 31 is provided at the area near the part 3''. An end part 32 of the form 31 is set higher than the board 14 of the head 1 and a space 12 is secured between the board 14 and the part 32. Thus, an S-shaped form or an M-shaped form is provided at the area near the part 3'' for reduction of the stress distortions. As a result, the contact 3 can have a form that secures high reliability.

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 more specifically relates to electrical conduction between a magnetic head and a rotating transformer. It is about the means.

[Background of the invention]

In the conventional device, as described in Japanese Utility Model Application Publication No. 59-59427, a printed circuit board is attached to the surface of a rotating cylinder opposite to the surface on which the magnetic head is provided, and the printed circuit board is connected to the magnetic head by a conducting wire. However, in such a conventional device, since the conducting wire from the rotary transformer is also connected to the printed circuit board, (1) the conducting wire that transmits the ultra-weak signal from the magnetic head is long (and is susceptible to externally induced noise). (2) The number of solders required for connection is large and workability is poor. (If the magnetic head is worn 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 using a printed circuit board as a relay, the connection length is shortened, making it less susceptible to outside-induced noise, and improving assembly workability. Especially regarding contacts,
This provides a good structure in which stress and strain do not occur in the brazing part.

[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 rotating magnetic head device of the present invention.
FIG. 2 is a sectional view of a main part of the top plan view AOB of FIG. 1.

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. A female contact 3 for connection with the rotating magnetic head member 1 is attached to the rotating cylinder 2, and this female contact is attached to a housing 1 made of a polymeric material.
It is stored in 0. The sacral end 3'' of the contact portion 6' of the female contact 3 is electrically connected to the terminal portion 1' of the magnetic head member 1 by brazing 8. A polymer member located on the upper part of the rotor 4 11 is provided with a male contact 7 whose one end is electrically connected by brazing 9 and the other end is electrically connected to the female contact 6.

FIG. 5 is a plan view of the rotary cylinder 2 according to the present invention, viewed from the terminal portion. In FIG. 6, the rotating magnetic head member 1 is attached to the rotating cylinder 2 with screws 15, and the female contact 3 is inserted and fixed into the housing 10.
It is incorporated into the rotating cylinder 2 described above. A printed circuit board 14 for electrical connection is attached to the rotating magnetic head 1, and is brazed to the wax part 3'' of the female contact 3.The rotating magnetic head 1 is attached to the rotating cylinder 2. However, after assembling the rotary magnetic head device, precise adjustment is required again.

FIG. 4 is an assembled plan view of the female contactor 3 and housing 10 of the present invention, and FIG. 5 is a side view of FIG. 4. FIG. 6 is a detailed plan view of the female contact shown in FIG. 5g4, and FIG. 7 is a side view of FIG. 6.

4 to 7, the female contact 5 is attached to the housing 10, and the wax portion 5" of the female contact 5 is attached to the housing 10.
is located outside the housing 10. How many parts 6
31 is provided in the vicinity of ``, and the end portion 32 of this slit 51 is located at a higher position than the printed circuit board 14 of the rotating magnetic head 1,
A space 12 is provided between the ends 32 of the square shape 31. 8 and 9 are views showing other examples of the end portion, and FIG.
The figure is a side view of the 1M" shape, and FIG. 9 is the side view of the "81" shape.

〔Effect of the invention〕

According to the present invention, it is possible to improve externally induced noise by 6 dB to 10 dB, and especially in areas with strong electric fields near medium wave broadcasting transmitting stations, interference is less likely to occur. Furthermore, since the number of soldered connections is greatly reduced, assembly workability is improved and a highly reliable rotating magnetic head device can be provided.

Further, according to the present invention, after brazing the solder portion 41 of the female contact and the printed circuit board of the rotary magnetic head, precise position adjustment of the rotary magnetic head 1 causes distortion in the female contact. However, due to business changes, connections can no longer be established and reliability is compromised. Therefore, 1
The female contact shape is reliable by easing stress and strain by providing an "O" shape, an "M" shape, and an "M" shape. By providing a space between them, the brazing solder is prevented from coming into contact with the head chip mounting bracket, increasing reliability.

[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. 3 is a partial plan view thereof, and FIG. A partial plan view, FIG. 5 is a side view of FIG. 4, FIG. 6 is a plan view of the contactor of FIG. 4,
7 is a side view of FIG. 6, FIG. 8 is a side view of the °M° shape, and FIG. 9 is a side view of the °S" shape. 1...Rotating magnetic head, 1'... Terminal part of magnetic head 1, 2...Rotating cylinder, 3...Female contact, 3'...Contact part, 3"...Brazing part (
5' other end), 4... rotary transformer rotor,
5...Rotating shaft, 6...Fixing member, 7...
Male contact, 8.9... Brazed part, 10...
Housing, 11... Polymer member, 12... Cavity, 14... Printed circuit board of rotating magnetic head, 15
...Screw, 51..."U° shaped part,
33..."M° shaped part, 54..."S° shaped part.

Claims (1)

[Claims] 1. A rotary cylinder equipped with a magnetic head and a rotary transformer equipped with a winding for signal transmission are provided, and the male contactor of the male contactor and the female contactor is rotated. attached to the cylinder, and attached the female contactor to the rotary transformer,
In a rotating magnetic head device in which electrical continuity is established between a magnetic head and a rotary transformer using the two types of contactors, a row between a magnetic head mounted on a rotary cylinder and a female contactor or a male contactor is used. A rotating magnetic head device characterized in that a nearby female contactor or male contactor is approximately U-shaped, approximately S-shaped, or approximately M-shaped in the thickness direction of the material. 2. The rotating magnetic head according to claim 1, characterized in that an air gap is provided in the vicinity of the brazed portion between the printed circuit board for electrical connection of the rotating magnetic head and the female contactor or the male contactor. head device.