JP2517139B2 - Rotating head drum device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotary head drum device that can be used in a video tape recorder or the like.

2. Related Art FIG. 2 shows an example of a conventional rotary head drum device,
Referring to the drawings, reference numeral 1 is a rotary drum, and a head base 2 is screwed to the rotary drum 1. Three
The magnetic head 4 fixed to the head base 2 is a printed board for the head which is also fixed to the head base 2, and the winding end of the magnetic head 3 is soldered. 5 is a head relay terminal inserted into the through hole of the rotary drum 1,
One end of the head relay terminal 5a held by the head relay terminal 5 is soldered to the printed board 4, and the other end is soldered to the rotary drum printed board 6 mounted on the upper surface of the rotary drum 1. Reference numeral 7 is a sleeve fitted coaxially to the rotary drum 1, 8 is a rotary transformer rotation side member fixed coaxially to the sleeve 7, and 9 is a rotary transformer relay terminal fixed to the rotary transformer rotation side member 8. The winding end of the rotary transformer rotating side member 8 is soldered to the root of the held rotary transformer relay terminal 9a, and the tip of the rotary transformer relay terminal 9a is soldered to the rotary drum printed board 6. ing.

The operation of the conventional rotary head drum device configured as described above will be described.

When the rotary drum 1 rotates, during recording, signals are transmitted to the rotary transformer rotating side member 8, the rotary transformer relay terminal 9a, the rotary drum printed board 6, and the head relay terminal.
5a, the print board 4 for the head, and the magnetic head 3 are transmitted in this order.

However, in the above-mentioned configuration, since the rotary transformer rotating side member 8 and the magnetic head 3 are connected, there are many soldering points and many assembling steps. Had.

The present invention solves such a problem, and an object of the present invention is to reduce the number of soldering points, reduce the number of assembling steps, and provide an inexpensive rotary head drum device.

Means for Solving the Problem In order to solve the problem, the present invention provides a magnetic head for recording / reproducing, a printed board for a head having a contact portion with a metal coating for rust prevention, and the magnetic head. And a head base to which the printed board for the head is fixed, a rotary drum having the head base fixed with screws, and a head relay terminal which is inserted and held in the rotary drum and on which a metal coating for rust prevention is formed, A sleeve fitted coaxially to the rotary drum, a rotary transformer rotation side member fixed coaxially to the sleeve, a rotary transformer relay terminal fixed to the rotary transformer rotation side member, the head relay terminal and the rotary It consists of a rotating drum printed board placed on the rotating drum to relay the transformer relay terminal. A socket made of a conductive metal is inserted and fixed to the lint plate, and one end of the head relay terminal comes into contact with the contact portion of the head printed board fixed to the head base by spring pressure, and one end of the rotary transformer relay terminal. Is electrically coupled to a winding portion arranged on the rotary transformer rotation side member, and the other end of the head relay terminal and the other end of the rotary transformer relay terminal are inserted into the socket to be fitted to the magnetic field. The head and the rotary transformer rotating side member are electrically coupled to each other.

Effects The present invention can reduce the number of soldering points and the number of assembling steps by the above-described configuration.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 11 is a rotary drum, and this rotary drum
A head base 12 is fixed to the 11 with screws. 13 is a magnetic head for recording and reproducing fixed to the head base 12, 14
Is a printed board for a head which is also fixed to the head base 12 and has a metal film for rust prevention formed on the contact portion, and the winding end portion of the magnetic head 13 is soldered. 15 is a sleeve coaxially fitted to the rotating drum 11, 16 is this sleeve 15
Rotary transformer rotating side member fixed coaxially to
Is a rotary transformer relay terminal fixed to the rotary transformer rotating member 16. Reference numeral 18 is a head relay terminal inserted into the through hole of the rotary drum 11, and 19 is a printed board for the rotary drum, which is arranged above the rotary drum 11. Reference numeral 20 is a socket made of a conductive metal, which is inserted and fixed to the rotary drum printed board 19. A metal film for rust prevention is formed on the surface of the head relay terminal 18a held by the head relay terminal 18, and the lower portion of the head relay terminal 18a contacts the contact portion of the head printed board 14 by spring pressure. Then, the upper portion of the head relay terminal 18a is inserted and fitted into the socket 20 to be electrically coupled. The winding end of the rotary transformer rotating side member 16 is soldered to the lower portion of the rotary transformer relay terminal 17a held by the rotary transformer relay terminal 17, and the upper portion of the rotary transformer relay terminal 17a is inserted and fitted into the socket 20. And is electrically coupled.

The operation of the rotary head drum device configured as described above will be described.

When the rotary drum 11 rotates, during recording, signals are transmitted in order of the rotary transformer rotating side member 16, the rotary transformer relay terminal 17a, the rotary drum printed board 19, the head relay terminal 18a, the head printed board 14, and the magnetic head 13. In the case of playback, the opposite is true.

Here, the rotary drum 11, the head base 12, and the
By inserting the head relay terminal 18 into the through hole of the rotary drum 11 from the lower side in the configuration of the magnetic head 13, the printed board 14 for the head, the socket 20, and the printed board 19 for the rotary drum, the head relay terminal is attached. The lower part of 18a comes into contact with the contact part of the printed board 14 for the head by spring pressure, and the upper part of the head relay terminal 18a is inserted and fitted into the socket 20 to reduce the number of soldering points and reduce the magnetic head 13 and the printed board for the head. Conduction between 14 is obtained. Further, a rotary drum unit constituted by the rotary drum 11, the head base 12, the magnetic head 13, the head printed board 14, the head relay terminal 18, the rotary drum printed board 19 and the socket 20, a sleeve 15, a rotary transformer rotary side member.
16, the rotary transformer relay terminal 17a and the socket 20 are inserted and fitted only by fitting the rotary body unit constituted by the rotary transformer relay terminal 17, and the rotary transformer rotating side member 16 and the magnetic head 13 are electrically connected. Is obtained.

As described above, according to this embodiment, it is possible to reduce the number of soldering points of the rotary head drum device and reduce the number of assembly steps for the rotary drum unit and the rotary body unit.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to reduce the number of soldering points of the rotary head drum device, reduce the number of assembling steps, and eventually reduce the cost.

[Brief description of drawings]

FIG. 1 is a sectional view of a rotary head drum device showing an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional rotary head drum device. 11 …… Rotating drum, 12 …… Head base, 13 …… Magnetic head, 14 …… Printed board for head, 15 …… Sleeve, 16
...... Rotary transformer rotation side member, 17 ...... Rotary transformer relay terminal, 17a ...... Rotary transformer relay terminal, 18 …… Head relay terminal, 18a …… Head relay terminal, 19 …… Rotary drum printed board, 20 …… socket.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 61-265720 (JP, A) JP 63-311749 (JP, A) Actual opening 63-130902 (JP, U) Actual opening 64- 56001 (JP, U)

Claims (1)

(57) [Claims] 1. A magnetic head for recording / reproducing, a print board for head having a contact portion with a metal coating for rust prevention, and a head base for fixing the magnetic head and the print board for head. A rotary drum having the head base screwed thereto, a head relay terminal inserted into and held by the rotary drum and having a surface coated with a metal film for rust prevention, and a sleeve fitted coaxially to the rotary drum. A rotary transformer rotating side member fixed coaxially to the sleeve, a rotary transformer relay terminal fixed to the rotary transformer rotating side member, and a head relay terminal and a rotary transformer relay terminal arranged on the rotary drum for relaying The printed circuit board for the rotating drum is inserted into the printed circuit board for the rotating drum, and a socket made of a conductive metal is inserted and fixed. Then, one end of the head relay terminal comes into contact with the contact portion of the head printed board fixed to the head base by spring pressure, and one end of the rotary transformer relay terminal is wound around the rotary transformer rotating side member. The magnetic head and the rotary transformer rotating side member are electrically coupled to the magnetic head by inserting and fitting the other end of the head relay terminal and the other end of the rotary transformer relay terminal into the socket. The rotating head drum device.