JP2551294Y2 - Frame for magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a magnetic head frame holding a core.

(Prior art)

In the conventional magnetic head, a predetermined number of laminated cores 1 and 3 are inserted into grooves 2a of frames 2 and 4 holding magnetic cores 1 and 3 as shown in FIGS. And fix it. At this time, the resin is applied by aligning the mount sets of the frames 2 and 4 on the tray, so that the resin 8 applied to the core 1 protrudes from the groove 2a and flows along the inclined surface 2c, and FIG. 18 (a) The position of the arrow [gamma] in (b) serves as an outflow portion of the resin, flows between adjacent frames by capillary action, and is bonded between the frames. A series of mounts that have been glued together between frames and need to be disassembled into a single mount set.

Also, one side wall of the frame serves as a proof of assembly, so it is necessary to remove the resin adhered to the side wall. The work of removing the resin adhering to the side surface has a great risk of deteriorating the accuracy of the side wall, which is the verification surface.

Further, since the frame becomes very small depending on the size of the magnetic head, it is difficult to align the frame with the tray so that the resin coating operation is easy and the adjacent parts do not contact each other.

[Purpose of the invention]

The present invention has been made in view of the above-described drawbacks, and proposes a magnetic head frame in which a space is formed between side walls from which a resin flows and a frame at a position from which the resin flows does not contact each other to prevent the frames from being bonded to each other. .

[Structure of device]

The present invention has a thick portion provided with a groove for holding a core, and a thin portion provided adjacent to the thick portion and thinner than the thick portion, for a magnetic head for bonding and fixing the core. In the frame, at least one of the side walls of all the step portions formed between the thick portion and the thin portion, the thick portion and the thin portion into which excess resin for bonding flows are attached. That the notch spans the

〔Example〕

Hereinafter, the present invention will be described with reference to the illustrated embodiments. FIGS. 1 to 8 show a first embodiment of a magnetic head frame. FIG. 1 (a) is a plan view in which one side core 1 is bonded and held in a groove 2a of one side frame 2, and FIG. FIG. 1 (b) (c) is a plan view in which the other core 3 is adhesively held in the groove 4a of the other frame 4.
1 is a left side view of FIG. 1 (a), and FIG. 3 is a perspective view of one side frame 2.

The one side core 1 and the other side core 3 have a tape sliding portion 1
a, 3a and protrusions 1b, 3b inserted into the core insertion hole 6a of the coil bobbin 6 on which the coil 5 is wound as shown in FIGS. A gap portion is formed with the spacer 7 interposed between the end faces.

The frame 2 is formed of a first thick portion 2b, a step portion or an inclined surface 2c according to the present invention, a second thick portion 2d, and a thin portion 2e. The second thick portions 2d are formed with grooves 2a to which the cores 1 are adhered and held, respectively.

Further, the frame 4 has a first thick portion 4b, a step portion or an inclined surface 4c according to the present invention, a second thick portion 4d, and a thin portion.
The first thick portion 4b and the second thick portion 4d are formed with grooves 4a in which the core 3 is bonded and held, respectively.

A first thick portion 2b of the one side frame 2 and the other side frame 4,
Projections 2f, 4f are formed on both sides of the grooves 2a, 4a of 4b,
When the one-side core 1 and the other-side core 3 are combined with the coil bobbin 6 interposed therebetween as shown in FIG. 10 to FIG. 10, the end faces of the projections 2f and 4f abut each other.

The two side walls 2g, 2 of the one side frame 2 and the other side frame 4
Notches 2i and 4i having a depth a and notches 2j and 4j having a depth b are formed in h, 4g and 4h, respectively.

The notches 2i and 4i are second thick portions 2d and 4d and thin portions 2e,
It is formed so as to extend across 4e and from the upper surface to the lower surface as shown in FIG.

Notches 2j and 4j are first thick portions 2b and 4b and inclined surfaces 2c and
4c and the second thick portions 2d and 4d.

The notches 2i, 2j, 4i, 4j of the depths a, b are, for example, 0.1 m
It is formed to a dimension of at least m.

When the one-side core 1 is adhered and held in the groove 2a of the one-side frame 2, a plurality of frames 2 are arranged as shown in FIG. 6, and as shown by broken-line ellipses in FIG. 1 (a) and FIG. Core 1 is grooved
The resin 8 is applied to the core 1 by being fitted into the core 2a, and is adhered and held. The same applies to the other side core 3 and the other side frame 4 in FIG.

When the one-side core 1 is adhered and held in the groove 2a of the one-side frame 2 as described above, the resin 8 protrudes from both sides as shown by arrows α and β in FIGS. And the position of arrow γ in FIGS. 1 (b) and 1 (c) becomes the resin outlet.

However, even if the arrow α side flows along the step surface 2r of the second thick part 2d and the thin part 2e, that is, the step part in the present invention, the notch 2i having the depth a is formed on the side wall 2g side. There is a space between the frames arranged next to each other.
2i stays at the edge, and is improved without depending on the method of controlling the amount of adhesive resin, the method of aligning the frame, etc. and irrespective of unstable factors (variation in resin amount, misalignment of the frame) of the method. No resin adheres in between.

In addition, even if the frame flows toward the other side wall 2h, the other frames arranged next to each other have the notch 2i having the depth a, so that the frames are not bonded to each other.

Even if the arrow β side flows along the inclined surface 2c, the resin does not adhere to the adjacently arranged frames because the cutout 2j having the depth b is provided on the side wall 2h side. In addition, even if it flows toward the other side wall 2g, the other frames arranged next to each other have the cutout portion 2j having the depth b, so that the frames are not bonded to each other.

Therefore, the frames are not adhered to each other, and the amount of the resin adhered to the side wall 2g serving as the proof surface is greatly reduced, the operation of removing the resin is simplified, and the accuracy of the proof surface is easily maintained.

As described above, the mount set in which the cores 1 and 3 are adhered and held to the frames 2 and 4 is obtained by polishing the end surfaces of the tape sliding contact portions 1a and 3a and the protruding portions 1b and 3b that form the gap,
It is combined with the coil bobbin 6 as shown in FIGS.
Next, a leaf spring 10 is fixedly welded in the case 9 and
After insertion with g and 4g as the identification surfaces and positioning with screws 11, a filler such as resin or adhesive is injected into the case 9 and hardened by fixation. The coil bobbin 6 has terminals 12, 12
Are press-fitted or insert-molded.

FIGS. 11 and 12 show a first modification. In the first embodiment, the notch 2i having a depth a is formed by cutting through from the upper surface to the lower surface as shown in FIG. 4, but in this first modification, It is formed in a notch 2i having a shallow bottom.

FIG. 13 shows a second modification in which a notch 2i having a depth a is formed by a dovetail groove.

FIG. 14 shows a second embodiment in which a notch 2k having a depth a extending across a first thick portion 2b, an inclined surface 2c, a second thick portion 2d, and a thin portion 2e is provided on a side wall 2g serving as a test surface. Are formed. For this reason, not only the adhesion between the adjacent frames is prevented, but also the resin does not adhere to the witness surface at all, and the operation of removing the resin from the proof surface is omitted, and the accuracy of the proof surface is maintained.

FIG. 15 shows a third embodiment, in which a notch 2i having a depth a is formed in a side wall 2g and a notch 2m having another depth a is formed as in the first embodiment. For this reason, similarly to the second embodiment, not only the adhesion between the adjacent frames is prevented, but also the resin does not adhere to the witness surface, and the operation of removing the resin from the proof surface is omitted, and the accuracy of the proof surface is reduced. Is maintained.

FIG. 16 shows a fourth embodiment in which notches 2p and 2q having a depth a are formed above and below a projection 2n having a thickness a on a side wall 2h. In the fourth embodiment, since there is no cutout in the side wall 2g serving as a proof surface, the resin flowing toward the side wall 2g adheres to the side wall 2g.
Since the resin from the adjacent frame does not adhere as in the related art, the amount of the resin adhered to the side wall 2g serving as the proof surface is reduced, and the operation of removing the resin is simplified,
It becomes easier to maintain the accuracy of the proof.

[Effect of the invention]

Since the present invention is configured as described above, even if the resin applied to the core protrudes from the groove and flows in the side wall direction along the step portion, the notch formed in the side wall comes out and the step portion is formed. Even if it flows out along the side wall direction, there is a cutout formed in the side wall, so that the resin does not adhere to the adjacent frames, and the adjacent frames do not adhere to each other. Moreover, since the resin is not attached to the proof surface or is reduced, the operation of removing the resin is omitted or simplified.
It becomes easier to maintain the accuracy of the proof.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 (a) is a plan view in which one side core is adhesively held in a groove of one side frame, and FIG.
1 (b) and 1 (c) are right side views of FIG.
The figure is a plan view in which the other side core is adhered and held in the groove of the other side frame, FIG. 3 is a perspective view of one side frame 2, FIG. 4 is a sectional side view of a main part of the frame, and FIG. FIG. 6 is an exploded plan view of the mount assembly and the coil bobbin, FIG. 6 is an exploded plan view of the mount assembly and the coil bobbin, and FIG. 8 is an exploded plan view of the coil assembly and the coil bobbin. FIG. 9 is an exploded perspective view of the case, FIG. 9 is a side sectional view of the case of the magnetic head, FIG. 10 is a rear view of the magnetic head, FIGS. 11 and 12 show a first modification, and FIG. FIG. 12 is a sectional side view of a main part of the frame, and FIG.
FIG. 14 is a cross-sectional side view of a main part of the frame of the second modification, FIG. 14 is a plan view of the mount set of the second embodiment, FIG. 15 is a plan view of the mount set of the third embodiment, and FIG. FIG. 17 is a plan view of a mount set according to the fourth embodiment, FIG. 17 is a plan view of a conventional frame in which cores are adhered and held, and FIG. 18 is a plan view of left and right mount sets. 1, 3, core, 2, 4, frame, 2a, 4a groove, 2b,
2d, 4b, 4d: thick part, 2c, 4c, 2r, 4r: stepped part, 2e,
4e: Thin part, 2g, 2h, 4g, 4h: Side wall, 2i, 2j, 2k, 2m,
2n, 2p, 2q, 4i, 4j ... Notch.

Claims (1)

(57) [Scope of request for utility model registration] 1. A magnetic head comprising: a thick portion provided with a groove for holding a core; and a thin portion provided adjacent to the thick portion and thinner than the thick portion, wherein the magnetic head is bonded and fixed. In the frame for use, the thick portion and the thin portion into which excess resin for bonding flows into at least one of the side walls of all the step portions formed between the thick portion and the thin portion. A magnetic head frame provided with a notch extending over the magnetic head.