JPS60209902A - Rotary magnetic head device - Google Patents

Abstract

PURPOSE:To attain easy attachment/detachment of a rotary cylinder by setting a diameter approximately equal to that of a relaying member for a pierced hole of a printed base board set on a rotary cylinder. CONSTITUTION:Perched holes 9 and 9' are provided to a printed base board 2, and the diameters of these holes are set approximately equal to those of relaying members 7 and 7'. The lead wires 3a, 3b, 3a' and 3b' of the members 7 and 7' are connected to the terminals on the board 2 through the holes 9 and 9'. The other en of those lead wires is connected a transformer 10 of the rotor side. The wire 3a has elasticity and covered with an insulator 8 in a columnar shape. Then the wire 3 is bent and connected to a terminal on the board 2 by solder 4a through the hole 9. The member 7 also has an insulated wall 15 which passes through the hole 9.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a helical scan type magnetic recording and reproducing device IrT.
zlFil*2'gmself "/-1 soV So(-)ryIX
÷shMyIyrril&=9Relates to the Q electrical connection between the magnetic head attached to the noring and the rotary transformer 0 [Background of the Invention] In a helical scan type magnetic recording/reproducing device M (hereinafter referred to as a VTR), a video signal is A magnetic head for distributing and reproducing recording signals such as The reproduction signal reproduced by the head must be supplied to a fixed reproduction signal processing circuit. For this,
The rotary magnetic head device of such a VTR is provided with a rotary transformer, and the magnetic head and each of the signal processing circuits are electrically connected via the rotary transformer.

The rotating transformer consists of a fixed stator-side transformer and a rotor-side transformer that faces the stator-side transformer and rotates integrally with the rotating cylinder, and the stator-side transformer is electrically connected to each of the above signal processing circuits. has been done. On the other hand, the rotor-side transformer is connected to one terminal of a printed circuit board attached to the rotating cylinder, and the other terminal of this printed circuit board is connected to the winding terminal of the magnetic head. In this way, by electrically connecting the rotor-side transformer and the magnetic head via a printed circuit board, the rotating cylinder can be removed from the rotating magnetic head device, making it easier to repair the rotating magnetic head device. I have to.

FIG. 1 is a plan view showing an example of a conventional rotating magnetic head device, in which 1 is a rotating cylinder, 2 is a printed circuit board, and 3 is a plan view showing an example of a conventional rotating magnetic head device.
(z, 3 b', 3 a - 3 b')! conductor, 4
a.

4b, 4αゝ, 4b'' are solder, and 5 is a rotating shaft.

In the figure, a rotating cylinder 1 is attached to rotate together with a rotating shaft 5, and a magnetic head and a printed circuit board 2 (not shown) are provided on the rotating cylinder 1. Wiring is done on the printed circuit board 2 (-not shown),
One terminal is connected to the winding terminal of the magnetic head, and the other terminal is connected to conductive wires 3G and 3b of a relay member, which will be described later, and solder 4a.

4b. The other ends of the conductors 3α and 3b are connected to a rotating transformer, as will be described later.

The conductors @3α° and 3B belong to other relay members, and are connected to terminals (not shown) on the printed circuit board 2 in order to connect between another magnetic head (not shown) and the rotary transformer. and are connected by solder 4d#4''.

Figure 2 (α) # (b) shows the state of connection between the terminals of the printed circuit board 2 and the rotary transformer using relay members, and Figure 2 (α) is connected to the broken line A-A'' in Figure 1. 2(b) is a partial sectional view taken along the dashed line BB', 6 is a disk, 7 is a relay member, 8 is an insulator, 9tL, 9b are through holes, and 10 is a partial sectional view taken along the dashed line BB'. Rotor side transformer, 11 is printed circuit board, 12G.

12b is solder, and 13 is a through hole. Note that parts corresponding to those in FIG. 1 are given the same reference numerals.

In Figures 2 (α) and (b), the rotation axis 5 (Figure 1)
A disk 6 is fixed to the disk 6, a rotating cylinder 1 and a rotor-side transformer 1o are attached to the disk 6, and a rotating shaft 5 is attached.
rotates as one.

The rotary cylinder 1 is provided with a through hole 13, and a through hole 9cL is provided in the printed circuit board 2 at a position opposite to the through hole 13.
, 9b are provided. Relay member 7 is conductive wire 3α, 3b
is covered with an insulator 8 to form, for example, a cylindrical shape. This relay member 7 is attached such that one end surface thereof is fixed to the rotor-side transformer 10 and the other end portion is inserted into the through hole 13. One end of the conductors 3α, 3b of the relay member 7 protrudes to the outside through through holes 9α, 9b provided in the printed circuit board 2, respectively, and the solder 4a
, 4b to terminals (not shown) of the printed circuit board 2. The conductors 3cL and 3b are bent at almost right angles within the insulator 8, and their tips are connected to terminals (not shown) of the printed circuit board 11 provided on the rotor-side transformer 10 by solder 125, 12b, respectively. has been done. It goes without saying that the other terminals on the printed circuit board 11 are connected to the four-step measuring transformer 10.

This is similar to the connection for 3G and 3b.

Therefore, when assembling the rotating magnetic head device, the disk 6, the rotor side transformer 10, and the middle member 7 are attached to the rotating shaft l.
(These installations can be done in any order)
, connect the conductors 3c, 3b to the through holes 9a, 9bKa, attach the rotary cylinder 1 to the disk 6, and solder the tips of the conductors 3a, 3b to the terminals on the printed circuit board 2 4α, 4b'''
To: Fix the connection. The same goes for the conductors 3α'' and 3b''.
(L, 4b 84 (except for L'S4B), tightening of screws etc. can be done by removing the members and lifting the rotating cylinder 1.

In this way, the rotary cylinder 1 can be attached and removed.

By the way, the leads @3α and 3b of the relay member 7 are very thin.
The diameters of the through holes 9α and 9b provided in the printed circuit board 2 are extremely small enough to allow these conductive wires 3''a and 3b to pass through, respectively.
I-1 For this reason, when incorporating the rotary cylinder 1 into a rotary magnetic head device, the conductors 3α and 3b are connected to the through holes 9cL and 9.
Since the conductive wires 3G and 3b must be passed through the through holes 9a and 9b, the conductive wires 3α and 3b must be visually positioned with respect to the through holes 9a and 9b. However, as mentioned above, the through holes 9G and 9b have very small diameters, and the conductive wire 3 is passed through them.
It is very difficult to position α and 3b.

The same is true for the conductors 3α° and 3B, and in the end, the four conductors 3a, 3b, 3♂, 3b′ are positioned visually through through holes with very small diameters. Only then can the rotating cylinder 1 be installed, and the installation of the rotating cylinder 1 requires a great deal of effort and skill.

In addition, as shown in Fig. 2 (α) and (b), the conductor 3
a.

Since the terminals 3b are soldered to the terminals of the printed circuit board 2 through the through holes 9α and 9b, respectively, in order to remove the rotating cylinder 1, the expanders 4a and 4b1 and
The four solders 4α' and 4b' (Fig. 1) must be melted at the same time. This is because even if the solder is melted, the conductor remains intact, so when the solder cools, the conductor will be re-soldered to the terminal of the printed circuit board.

Conventionally, therefore, all the solder is removed by melting the solder one by one and sucking up the melted solder with a setup machine. For this reason, it took time and effort to remove the rotary cylinder 1.

As mentioned above, in the conventional rotating magnetic head device,
It takes a lot of effort to install and remove the rotating cylinder, which reduces the efficiency of assembly and repair work, and has the drawback of poor serviceability.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary magnetic head device which eliminates the drawbacks of the prior art described above and which facilitates attachment and detachment of a rotary cylinder, thereby improving the efficiency and serviceability of assembly and repair work. .

[Summary of the invention]

In order to achieve this object, the present invention provides a through hole which is provided in a printed circuit board on a rotating cylinder, has a large diameter that is approximately equal to the diameter of the relay member, and positions the relay member through the through hole. The present invention is characterized in that the elastic conductive wire of the relay member is passed through the through hole and connected to the terminal of the printed circuit board.

[Examples of practical inventions]

Hereinafter, practical examples of the present invention will be explained with reference to the drawings.

FIG. 3(a) is a plan view showing an embodiment of a rotating magnetic head device according to the present invention, and FIG. 3(b) is a sectional view taken along the dashed double-dashed line c-a' in FIG. 7° is a relay member, 9.
9° is a through hole, 14 is a stator side transformer, and the first
FA, parts corresponding to those in FIG. 2 are given the same reference numerals.

In FIGS. 3(α) and (b), the printed circuit board 2 on the rotating cylinder 1 is provided with two through holes of 9.9°,
The diameters of these through holes 9 and 9' are such that the two conductors 3a and 3b of the relay member member 7 pass through the through hole 7, respectively, and the terminals (not shown) on the printed circuit board 2 and the solder 4a and 4.
connected by b. In addition, the two conductive wires 3 a' and 3 b' of the relay member 7° pass through the through holes 7°, respectively, and are connected to terminals (not shown) on the printed circuit board 2 and solder 4.
a'', 4b'.

The other ends of the conductors 3α and 3b of the relay member 7 and the other ends of the conductors 113α′ and 3b” of the relay member 7″ are similar to the prior art described above,
Each is connected to the rotor side transformer 10. The fixed cylinder is provided with a stator-side transformer 14, which is connected to a signal processing circuit (not shown), and the stator-side transformer 14 and the rotor-side transformer 10 form a rotating transformer.

FIGS. 4(α) and (b) are views of the relay member 7 shown in FIG. 3 from a different direction, and 15 is an insulating wall, which corresponds to FIGS. 2 and 3. are given the same symbol.

In the fourth FXJ (α), (b), the relay member 7 is conductive @3a'Ih1-! A right-hand eggplant is placed on the FJ7 layered plate, and these conducting wires 3α and 3b are covered with an insulator 8 to form a columnar shape. These *@aa and ab pass through the MIIj hole 9 of the printed circuit board 2, are bent elastically, and are connected to terminals (not shown) on the printed circuit board 2 and solder 46.4.
He is related by bK. In addition, the relay member 7 has 1
An insulating wall 15 passing through the iIiii hole 9 is provided, and the conductor 3α
, 3b are prevented from being short-circuited.The other configurations are the same as those of the prior art described above, and the relay member 71 is also the same as the relay member 7 described above.

According to this specific example, when the rotary cylinder 1 is attached to a rotary magnetic head device, the diameters of the through holes 9 and 9 provided in the printed circuit board 2 are large.
It is easy to visually position the relay members 7 and 7° through the rotary cylinder 2, and such positioning necessarily positions the conductors aa, ab, 3aj, and 3b°. Installation is extremely easy.

In addition, when removing the rotating cylinder IIk from the rotating magnetic head device, referring to Figure 14 (b), it will cost $135.
, 3b are elastically deformed, so the solder 4'
When m 4 b is melted, the conductors 3α and 3b are deformed and hidden from the solders 4G and 4b.Therefore, there is no need to remove the solders 4a and 4b, and the work of sucking up the solder can be omitted and the work of removing the rotating cylinder is reduced. is simplified.

5th WJ(b), -) are sectional views of other specific examples of the relay member 7 in FIG. 3, viewed from different directions, and FIG.
→, parts corresponding to (b) are given the same reference numerals.

In this specific example, as the conductive wires 3G and 3b of the relay member 7,
A relatively hard elastic conducting wire such as phosphor bronze is used, and the parts protruding from the through holes 9 of these 4@3α and 3b are bent toward terminals (not shown) of the printed circuit board 2, and The portions are pressed against the respective terminals to be elastically deformed and connected to the respective terminals by solder 48#4b. Further, the insulating wall 15 does not need to protrude from the printed circuit board 2.

The same applies to the 7° relay member, and the structure of the other parts is the same as the specific example shown in FIG. 3 (b).

In this specific example, as well as the specific example shown in FIG.

3b, 3α", 3b" can be positioned, and by melting the solder 4aa4ha4aa4b', the ai
Since the elastic deformation of 113cL-3b#3a'' and 3b' is released and they are separated from the solder 46#4ba4G'#4b'', it becomes very easy to attach and detach the rotary cylinder.

Note that the above-mentioned relay members 7 and 72 do not necessarily include the insulating wall 1.
5 is not necessary, and even if it is not provided, short circuits between the conductors 3G and 3b and between the conductors a ti and 3 b° can be sufficiently prevented.

〔Effect of the invention〕

As explained above, according to the present invention, it is extremely easy to install and remove the rotating cylinder, and the efficiency of assembly and repair work is improved.
It is possible to provide a one-rotation magnetic head device with tj bullets α -1, -1111-.

[Brief explanation of drawings]

Figure 111 is a plan view showing an example of a conventional rotating magnetic head device, Figure #12 (a) is a partial sectional view taken along the dashed line Moom° in Figure 1, and Figure 2 (Φ) is a partial cross-sectional view taken along the dashed line B-gon in Figure 11. Figure 13 (G) is a plan view showing an embodiment of the rotating magnetic head device according to the present invention, and Figure 3 (b) is a partial cross-sectional view taken along #
Figure I3 (a cross-sectional view along the double-dot chain 110-0'' of the slope, Figure 4 (→, (b) is a cross-sectional view of the example of the relay member in Figure 3 viewed from different directions, Figure 5 (a) ) and (b) are sectional views of other specific examples of the relay member shown in Fig. tIIi3, viewed from different directions.l...Rotating cylinder, 2...Printed circuit board, 3a e ab , 3t, sb'---
・-Conductor, 4G, 4b, 4a#, 4be...:
Solder, 5...Rotation axis, 7.7°...
Relay member, 8...Insulator, 9, 9"...
・・Through hole, 10・・・・・・0 =, pedometer transformer%
12G#12b...Figure 7 Figure 3 tσノ (b) 41st 5th tO no Ru (b) Figure (b)

Claims (1)

[Claims] A rotating cylinder provided with a magnetic head and a printed circuit board and a rotating transformer are integrally attached to a rotating shaft, and a terminal on the printed circuit board is connected to the winding of the magnetic head, and In a rotating magnetic head device in which the other terminal of the relay member is connected to the rotary transformer by a relay member, the relay member is made of an insulating film coated with an elastic conductive wire and has a columnar shape, and the printed circuit board has a diameter approximately equal to the diameter of the relay member. A rotary magnetic head device characterized in that through holes having equal diameters are provided, and the elastic conductive wire is passed through the through holes and connected to the other terminal of the printed circuit board.