JPS6236719A - Rotary magnetic head device - Google Patents

Abstract

PURPOSE:To improve the assembling operability of a rotary magnetic head device by forming a projected part to a polymer member unified with a contact and providing a cut 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. A part 3'' at the other end of a contact part 3' of the contact 3 is connected electrically to a terminal part 1' of the head 1 by soldering 8. A 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. A cut 4d is given to a part of the outer diameter of a core 4e and a projected part 116 of the member 11 is put into the cut 4d for the benefit of the angle positioning. Thus the coincidence is secured between a connection lead-out groove 4f of the rotor 4 and a cut 11a of the member 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotating hunting 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, the conducting wire from the rotary transformer is also connected to the printed circuit board, so (1) the conducting wire that transmits the ultra-weak signal from the magnetic head becomes long and is susceptible to externally induced noise. (2) The number of solders required for connection is large and workability is poor. (If the W!1 head wears out, it must be replaced for each rotating cylinder, but many solder parts must be removed at the time of 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 interrupting the printed circuit board, the connection length is shortened, making it less susceptible to externally induced noise, and improving assembly work efficiency. For this purpose, a convex portion was provided on the polymer member integrally molded with the contact, and a notch was provided on the rotating transformer core.

[Embodiments of the invention]

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

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

FIG. 5 is a plan view of only the rotating part from which the rotating cylinder 2 in FIG. 2 is removed, and FIG. 4 is a sectional view taken along line C0-D in FIG.

In FIGS. 3 and 4, a male contactor 7 is installed on the surface of the polymer member 11 opposite to the a-column 4 in parallel to the rotating shaft 5, and Volume i! I 4
The terminals 4C of α and ah are connected to a part of the male contact 7 and to the brazing 9 through the notch 11α in the outer diameter of the polymer member 11.

5 is a plan view of the winding side of the a-taly transformer rotor 4 as viewed from the arrow X in FIG. 4, and FIG. 6 is a plan view of the winding side of the a-taly transformer rotor 4. There is a notch 4d in a part of the outer diameter of the core 4e, and a protrusion 116 of the polymer member 11 is formed.
is inserted and angular positioning is performed, so that the notch 11α of the polymer member 11 can be partially formed in the wire connection drawer 11141 of the rotor 4.

FIG. 7 is a plan view of the polymer member 11 alone. The protrusions and notches were broken in several places.

〔Effect of the invention〕

According to the present invention, external induced noise can be reduced by 6tiB to 10dB.
This makes it difficult for interference to occur, especially in areas with strong electric fields near medium-wave broadcast transmitting stations. Furthermore, since the number of soldered connections is greatly reduced, assembly workability is improved and a highly reliable rotary hunting head device can be provided. The present invention is particularly effective in improving the assembly work of a rotating transformer core and a polymer member having integrally molded contacts.

[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 AOBIlfr side view of FIG. 1, FIG. 3 is an internal plan view thereof, and FIG. COD sectional view, Figure 5 is a view seen from the arrow direction of Figure 4, Figure 6 is a-
FIG. 7 is a plan view of the winding side of the Talytrans A-2 4, and FIG. 7 is a plan view of the polymer member 11 alone. 1...Rotating magnetic head 4f...Wire connection pull-out groove 1'
...Terminal part of 1 10...Housing 2...
Rotating cylinder 4m...Contact part of core 5'...3 3'...Other end of 5' 3...Female contact
4...a-Tali transformer a-ta 5...rotating shaft
6...Fixing member 7...Male contactor 4
d... Cut 9... Brazing 8... Brazing 11... Polymer member 11h... Polymer member convex portion 11α... Cut 4C on the outer diameter of the madder molecular member...
・Winding terminal 4α...Winding 4b...Winding, -':'r゛＼-shi □Masu Shioji Koyo Katsuo- 11 figure et al. 32 times 13 mouth CD 40th figure erasing mouth

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 the rotary transformer. In the rotating magnetic head device, the male contact is attached to a transformer, and the other is attached to the rotary transformer or the rotary cylinder, and the two types of contacts provide electrical continuity between the magnetic head and the rotary transformer. all the children,
A polymer member is integrally molded into a donut shape, a notch is provided on the outer diameter of the planar rotary transformer core, and a convex portion is provided on the polymer member at a location corresponding to the notch of the rotary transformer core, A rotating magnetic head device characterized by angular positioning. 2. The rotary magnetic head device according to claim 1, wherein the donut-shaped polymer member is provided with a step or a convex portion that can at least regulate the outer diameter of the rotary transformer.