JPH05964Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a head drum assembly that simplifies the signal line connection between a rotary transformer and an external circuit board.

[Conventional technology]

Video tape recorders, which record signals on magnetic tape using a rotating magnetic head, require a rotary transformer that transmits and receives signals between the magnetic head and the outside without contact. Connected to the circuit board. In the conventional head drum assembly 1 shown in FIG. 3, two magnetic heads 2a and 2b are integrated with an upper drum 3, and a stator of a rotary transformer 5 provided between the upper drum 3 and the lower drum 4. The side and external circuit board 6 are connected by a flexible lead film 7.

The lead film 7 has magnetic heads 2a and 2b.
Three wires, two signal wires 7a, 7b corresponding to
It is connected to the video signal processing circuit on the circuit board 6 by soldering.

[Problem that the invention attempts to solve]

In the conventional head drum assembly 1 described above, the lead film 7 that connects the stator side of the rotary transformer 5 and the circuit board 6 uses soldering to connect with the circuit board 6, so the connection work is troublesome and to some extent There were problems such as having to rely on the work of skilled workers, and there was a limit to work efficiency.

[Means for solving problems]

This invention solves the above problems and consists of a rotary transformer that transmits signals from the rotating magnetic head to the outside without contact, and one end of this rotary transformer connected to the stator side and the other end connected to the stator side. holding the other end of the signal line between a signal line connected to an external circuit board and a plug attached to the circuit board and inserted to a locking position;
The gist is that a socket for electrically connecting a signal line and a circuit board is provided.

[Effect]

In this idea, one end of the signal wire is connected to the stator side of the rotary transformer, and the other end of the signal wire is held between a socket installed on the circuit board and a plug that fits into the socket, and is connected to the required circuit. Eliminates soldering.

〔Example〕

Examples of this invention will be described below with reference to FIGS. 1 and 2. 1 and 2 are a plan view and an exploded perspective view of essential parts, respectively, showing an embodiment of the head drum assembly of this invention. In FIG. 1, the same components as in FIG. 3 are given the same reference numerals.

In FIG. 1, a head drum assembly 11 includes a socket 12 provided on a circuit board 6, and a socket 12 provided on the circuit board 6.
By sandwiching the ends of the signal wires 7a, 7b, 7c between the plug 13 and the socket 12, which are slidably fitted in the front-rear direction, the signal wires 7a, 7b, 7
c and the circuit board 6, eliminating the need for soldering.

The socket 12 has a hollow part 1 as shown in FIG.
Three lead terminals 15a, 15b, 1 on the bottom of 4
5c is exposed, and these lead terminals 15
a, 15b, and 15c pass through the back surface of the socket 12 and the circuit board 6, and are fixed by soldering. A plug 13 is located on the upper surface of the socket 12.
A protrusion 16 is carved therein, which functions as a sliding guide and a stopper. The large stepped portion 16a serves as a retainer, and the small stepped portion 16b serves as a boundary between a standby position and a locking position, which will be described later.

The plug 13 has a shape that fits into the outer wall of the socket 14, and has a tongue portion 17 that engages with the hollow portion 14 of the socket 12, and a claw portion 18 that engages with the protrusion 16. The upper surface of the tongue part 17 is tapered and slopes forward and downward, and as it engages with the hollow part 14, it is pressed downward. In addition, the tongue part 1
An insertion hole 19 for the lead film 7 passes through just below the base of the rotary transformer 7, so that the lead film 7 from the rotary transformer 5 can be inserted therein.

The claw portions 18 engage with both sides of the protrusion 16 of the plug 13, are prevented from coming off by the large step portion 16a, and are positioned by the small step portion 16b. Here, the claw portion 18
When the plug 13 is engaged between the large step portion 16a and the small step portion 16b, the plug 13 is in the standby position, and the claw portion 18 climbs over the small step portion 16b and engages with the deep part, so that the plug 13 is in the locked position.

Therefore, when connecting the lead film 7,
First, confirm that the plug 13 is pulled out to the standby position, and then insert the end of the lead film 7 into the insertion hole 19. Next, the rear end surface of the plug 13 is pressed with a finger, and the plug 13 is pushed in until the claw part 18 finishes climbing over the small step part 16b. When the plug 13 reaches the locking position, which is the push-in limit position, the tongue portion 17 holds the lead film 7 between the lead terminals 15a,
15b, 15c, and the signal lines 7a, 7b, 7c and the lead terminals 15a,
The connection between 15b and 15c is completed. When the plug 13 is in the locking position, the claw portion 18 is in a locked state at the back of the small step portion 16b, so that the plug 13 is firmly fitted with no looseness, and a connection state resistant to external vibrations is obtained.

In this way, the head drum assembly 11 is
The signal lines 7a, 7b, 7c drawn out from the stator side of the rotary transformer 5 are connected to a socket 12 attached to the circuit board 6 and a plug 13 fitted thereto.
Since the configuration is such that the signal lines 7a, 7b, and
Unlike the conventional method for connecting 7c circuits, the connection work is extremely simple, and the desired connection state can be obtained regardless of the skill level of the operator, simplifying the assembly process and improving the reliability of the assembly work. is possible.

FIG. 4 is a perspective view of main parts of a head drum assembly showing another embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view showing a state in which the socket and plug shown in the figure are connected. The difference from FIGS. 1 and 2 is that in FIGS. 1 and 2, the circuit board 6 is fixed to the back side of the socket 12, whereas in FIGS. The only difference is that it is fixed to the bottom of the socket 12. FIG. 5a shows the state before the socket and plug are connected. Now, when the plug 13 is pushed into the socket 12, as shown in Fig. 5b,
The tongue portion 17 of the plug and the lead terminals 15b, 15a,
15c, and as a result, the signal line 7 and the circuit board 6 are connected without soldering.

[Effect of idea]

As explained above, according to this invention, the signal line pulled out from the stator side of the rotary transformer is sandwiched between the socket installed on the circuit board and the plug that fits into it, and connected to the required circuit. Because of the structure, the connection work is extremely simple, and the desired connection state can be obtained regardless of the skill level of the worker, unlike conventional methods that connect signal wire circuits by soldering. It has excellent effects such as simplifying the process and improving the reliability of assembly work.

[Brief explanation of the drawing]

1 and 2 are a plan view and an exploded perspective view of essential parts, respectively, showing an embodiment of the head drum assembly of this invention, and FIG. 3 is a plan view showing an example of a conventional head drum assembly. FIG. 4 is a perspective view of a main part of another embodiment of the head drum assembly of the present invention, and FIG. 5 is a sectional view showing a state in which the socket and plug of FIG. 4 are connected. 2a, 2b...Magnetic head, 5...Rotary transformer, 6...Circuit board, 7a, 7b, 7c...
Signal line, 11...Head drum assembly, 12...
Socket, 13...Plug.

Claims (1)

[Scope of utility model registration request] It consists of a rotary transformer that transmits signals from the rotating magnetic head to the outside without contact, and a flexible printed circuit board that has one end connected to the stator side of the rotary transformer and the other end connected to an external circuit board. a socket for electrically connecting the signal line and the circuit board by sandwiching the other end of the signal line between the signal line and a plug that is attached to the circuit board and inserted to a locking position; A head drum assembly is provided, wherein one end of the signal line is connected to the stator side of the rotary transformer, and the other end of the signal line is connected between a socket attached to the circuit board and a plug fitted thereto. A head drum assembly characterized by eliminating the need for soldering for clamping and connecting to required circuits.