JPH0110734Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite magnetic head that integrates two magnetic heads.

Conventionally, a composite magnetic head, which is a combination of magnetic heads with different purposes or functions, has been used. Such a conventional composite magnetic head is shown in FIGS. 1 and 2.

Figure 1 is a perspective view of the composite magnetic head, where 1 is the first
2 is a second magnetic head. As a combination of the first magnetic head 1 and the second magnetic head 2, for example, the first magnetic head 1 is
There is a combination of a VTR (video tape recorder) audio head, control head, and second magnetic head 2 as the audio erasing head. Reference numeral 3 denotes a metal shielding case having side walls 3a, 3b, 3c, and 3d, which shields the magnetic field from the outside and removes any negative magnetic influence on the first magnetic head, and also protects the parts constituting the first magnetic head. It also serves as a storage case. 4 is shield case 3
This is a terminal protruding from the 5 is the wall surface 5a, 5
This is a synthetic resin hold case having numbers 5c and 5d, and houses the components of the second magnetic head. 6 is a terminal of the second magnetic head.

7 is a first magnetic head 1 and a second magnetic head 2
This screw is used to secure the two together. The fixing means are shown in cross-section in FIG. However, illustration of the components of the first and second magnetic heads 1 and 2 is omitted. In FIG. 2, reference numeral 8 denotes a screw hole provided in the hold case 5, into which the screw 7 is inserted. Reference numeral 9 denotes a large diameter portion of the screw hole 8 to prevent the head of the screw 7 from protruding outside. Reference numeral 10 indicates a tap hole for a screw 5 provided in the side wall 3a of the shield case 3.

In order to fix the first magnetic head 1 and the second magnetic head 2 together, first, the respective components are assembled into each magnetic head 1 and 2, and then the first magnetic head 1 and the second magnetic head 2 are fixed together. (alignment of the core with respect to tape running), and then insert the screw 7 into the screw hole 8 and screw it into the tap hole 10 to attach the first and second magnetic heads 1 and 2 to the side wall 3a. and the wall surface 5a are fixed in a state in which they are in contact with each other. After that, in order to prevent the screw 5 from loosening, the screw hole 8 is
Inject adhesive or resin into

By the way, such a conventional fixing means requires machining of the tap hole 10, a complicated mold for providing the screw hole 8, and a complicated mold for the hold case 5. burrs are easily formed during molding and must be removed and corrected; the process from inserting the screw 7 to injecting adhesive or resin into the screw hole 8 is laborious and requires many steps;
There were drawbacks such as difficulty in adjusting the tightening strength of the screws 7.

An object of the present invention is to provide a composite magnetic head which eliminates these drawbacks, has a simple fixing part, and can greatly reduce the number of man-hours required for fixing.

To achieve this object, the present invention provides a composite magnetic head including a first magnetic head having a first case and a second magnetic head having a second case. A first notch is provided in a part of a side wall adjacent to the second case of the second case, and a second notch corresponding to the first notch is provided in a wall part of the second case adjacent to the first case.
A hole communicating with the notch and the second notch is provided, and a wall formed by the hole, the first case, and the measuring wall are connected to the first notch and the second notch. It is characterized in that it is clamped with a clamping member made of an inserted elastic piece and fixed with resin.

To construct this composite magnetic head, the first magnetic head and the second magnetic head are aligned with the side wall with the first notch and the wall with the second notch aligned. , after completing the alignment, inserting the clamping member from the outside into the first notch and the second notch,
A side wall having a first notch and a side wall having a second notch are sandwiched. As a result, the first magnetic head and the second magnetic head are sandwiched together. In this state, resin is injected to fix the first magnetic head and the second magnetic head.

The present invention will be described below with reference to embodiments shown in FIGS. 3 to 7.

FIG. 3 is a perspective view of the shield case of the first magnetic head. Note that the same parts as shown in FIGS. 1 and 2 are denoted by the same reference numerals, and their explanations are omitted (the same applies to FIGS. 4, 6, and 7 below). Reference numeral 11 indicates a notch provided in an appropriate portion of the side wall 3a of the shield case 3. The first example of this example
The difference between the magnetic head 1 and the conventional one is that the side wall 3a has a notch 11 instead of a tap hole 10.
The point is that this is provided.

FIG. 4 is a perspective view of the hold case of the second magnetic head. 14 is a hole formed in the hold case 5 by cutting out a part of the wall surface 5a thereof. Reference numeral 12 indicates a cutout portion of the side wall 5a. hole 1
4, the side wall 5 is formed between the hole 14 and the wall surface 5a.
e is constructed. 13 is a slope formed on the hole 14 side of the side wall 5e.

Reference numeral 15 denotes a clamping piece used to fix the first magnetic head 1 and the second magnetic head 2.
In particular, the clamping piece 15 has a substantially U-shape as shown in FIG. 5, and is made of an elastic material. 1
5a and 15b are both side pieces of the clamping piece 15, and these can be expanded to both sides against elasticity.
15c is a bent portion obtained by bending the tip of the side piece 15b.

Next, fixing of the first magnetic head 1 and the second magnetic head 2 will be explained based on FIGS. 6 and 7. As shown in FIG. 6, first, the components are assembled into each of the magnetic heads 1 and 2 (illustration of the assembled components is omitted. The same applies to FIG. 7), and the tape sliding surface is polished. , shield case 3
The first magnetic head 1 and the second magnetic head 2 are aligned with the side wall 3a of the hold case 5 aligned with the wall surface 5a of the hold case 5, and after the alignment is completed, the clamping piece 15 is moved from the direction shown by arrow A. Notch 11,
Insert into 12. Due to the thickness of the side wall 3a of the shield case 3 and the thickness of the side wall 5e of the hold case due to the formation of the hole 14, the clamping piece 15 is attached to both sides of the side wall 1.
While expanding 5a and 15b against elasticity, cut out the notch 1.
It is inserted until it reaches the bottom of 1 and 12, and both side walls 3
Sandwich a and 5e. As a result, the first magnetic head 1 and the second magnetic head 2 are clamped and fixed by the elasticity of the clamping piece 15. Finally, adhesive or synthetic resin is injected into the space of each head.

As described above, in this embodiment, both side walls of the first magnetic head and the second magnetic head that are joined to each other are clamped and fixed by the approximately U-shaped elastic clamping pieces. There is no need to provide tap holes or screw holes, and the structure of the fixed part is simple, and
This can be easily done by simply inserting the clamping piece. moreover,
This is further ensured by preventing the clamping piece from moving. In addition, when the resin is injected into the space of each head, the clamping piece is inserted into the notch and does not protrude outside, so it is possible to firmly join both cases without the resin protruding outside. can. Further, since a slope is provided between the notch of the hold case and the hole, and a bent portion is provided at the tip of the clamping piece, the clamping piece can be inserted smoothly.

In the above embodiment, a clamping piece was prepared separately and inserted into the notch in the side wall. It can also be welded. In this case, the side wall of the hold case is inserted into the clamping piece, and alignment is performed while the holding case is in the clamping state.

As described above, in the present invention, the both side walls of the first magnetic head and the second magnetic head that are joined to each other are clamped and fixed by the elastic clamping member, so that the structure of the fixing part is simple. The mold does not become complicated and the number of man-hours required for fixing can be greatly reduced. Further, since the clamping pieces clamp the side walls of the combined portion of both cases, the central part of both cases is clamped in the combined state, and stable clamping can be performed. Furthermore, this stable clamping is further ensured by the fact that the clamping pieces are inserted into the cutout pieces, thereby preventing movement of the clamping pieces. In addition, when resin is injected into the space of each head, the clamping piece is inserted into the notch and does not protrude outside the case, so it is possible to strengthen each head without causing the resin to protrude outside the case. Can be joined to.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional composite magnetic head, Figure 2 is a perspective view of a conventional composite magnetic head;
The figure is a sectional view across the screw hole and tap hole in Figure 1, Figure 3 is a perspective view of a shield case according to an embodiment of the present invention, and Figure 4 is a perspective view of a hold case according to an embodiment of the present invention. 5 is a perspective view of a clamping piece according to an embodiment of the present invention, FIG. 6 is a perspective view of a composite magnetic head according to an embodiment of the present invention, and FIG. 7 is a side wall cutaway in FIG. 6. FIG. 3 is a cross-sectional view across the notch. DESCRIPTION OF SYMBOLS 1... First magnetic head, 2... Second magnetic head, 3... Shield case, 3a, 5e... Side wall, 5... Hold case, 11, 12... Notch, 14... Hole, 15...Pinch piece.

Claims (1)

[Scope of utility model registration request] In a composite magnetic head constituted by a first magnetic head having a first case and a second magnetic head having a second case, a side wall of the first case adjacent to the second case is A first notch is provided in a portion of the second case, and a second notch corresponding to the first notch is provided in a wall portion of the second case adjacent to the first case; A communicating hole is provided, and the wall formed by the hole and the side wall of the first case are clamped by a clamping member made of an elastic piece inserted into the first notch and the second notch. A composite magnetic head characterized by being fixed with resin.