JPH0648563Y2 - Magnetic tape head - Google Patents

Description

[Detailed Description of the Invention] [Outline] A reinforcing portion for filling the winding portion accommodation chamber is provided in the winding portion accommodation chamber of the frame to which the winding core is mounted, and the core receiving wall and the winding portion accommodation on the magnetic tape sliding surface side. By providing the frame integrally with the bottom of the chamber, the frame is prevented from protruding toward the sliding surface of the magnetic tape, and the gap can be closely attached to the magnetic tape.

[Industrial application field]

The present invention relates to a magnetic tape head for reading and writing information on a magnetic tape in a magnetic tape device used as a file device of an information processing system, and more particularly to a magnetic tape head having a large gap between adjacent gaps.

[Conventional technology]

FIG. 4 is a diagram showing the entire magnetic tape head, in which (a) is a plan view, (b) is a front view, and (c) is a right side view. The arrow a1 indicates the running direction of the magnetic tape T, and this magnetic tape head has two directions G1, G2 in the width direction of the magnetic tape.
There is a recording / playback gap only for tracks. Therefore, by moving the magnetic tape head with respect to the magnetic tape in the direction perpendicular to the arrow a1, track selection is performed and recording / reproduction is performed. In this way, the magnetic tape head is shifted relative to the magnetic tape T,
Since the track is selected, the gap between G1 and G2 can be increased.

In the tape running direction, the gap W in the middle is for recording,
The left and right gaps R / E are for playback and erase. Inter-gap shield plates 1 and 2 are inserted between the central recording gap W and the reproducing / erasing gaps R / E and R / E on both sides thereof. An inter-track shield plate 3 is inserted between the two sets of gaps G1 and G2.

Since this magnetic tape head has the central recording gap W and the two reproducing / erasing gaps R / E on both sides thereof, the frame for mounting the winding core is F1,
It has four pieces of F2, F3, and F4, and they are fastened and fixed together by tightening screws 4 and 5.

FIG. 5 shows a conventional magnetic tape head taken along the line AA in FIG. 4, which has a chamber 8 for accommodating the winding core 6, the I core 7, and the like. FIG. 6 is a view showing only the frame F4 at the right end of this magnetic tape head. (A) is a front view seen from the winding part accommodation chamber 8 side, (b) is a plan view, (c) is (a). It is the c-c sectional view of a figure. In the frame F4, two core receiving grooves 91a, 91b and 92a, 92b are formed so that recording / reproducing can be performed on two tracks at the same time. Then, as shown in FIG. 7A, the front and rear ends of the winding core 61 are inserted into the core receiving grooves 91a and 91b. Similarly, the front and rear ends of the winding core 62 are inserted into the core receiving grooves 92a and 92b. As shown in FIG. 7, the shield plate 3 is inserted into the shield plate insertion grooves 10a and 10b to magnetically shield adjacent tracks. Reference numerals 12 and 13 are lead wire insertion grooves. As shown in FIG. 7, the lead wires 11 of the winding cores 61 and 62 are connected to the respective terminals 14 through the lead wire insertion grooves 12 and 13. .
In this way, the winding cores 61, 62, the shield plate 3, the lead wires
The frame F4 side is completed by filling and fixing the synthetic resin 16 and 17 in the winding part accommodation chamber 8 and the terminal accommodation chamber 15 with the 11, the terminals 14 and the like mounted.

The other frames have substantially the same configuration. However, as shown in FIG. 5, the intermediate frames F2 and F3 have winding portion accommodating chambers 8 and 8 on both sides. Such a frame F1 ... F4
The magnetic tape head is completed by tightening and fixing the screws with screws 4 and 5.

[Problems to be solved by the invention]

The winding core 6, 61, 62 has a thick portion around which the winding 10 is wound, so that a chamber 8 for accommodating the winding portion 10 is formed.
The winding portion accommodating chamber 8 is a single chamber 8 common to the two winding cores 61 and 62 in order to simplify the shape and facilitate processing.

By the way, a characteristic test such as durability is conducted with the magnetic tape head completed. As one of them, a characteristic test is conducted under a harsh environment by raising temperature and humidity. When the temperature is raised in this way, due to the expansion of the filling resin 16,
As shown in FIG. 8, the core receiving wall 18 on the tape running surface side is pushed out by the expansion of the resin. Therefore, when the core receiving wall 18 does not return to its original position after the end of the environmental test, a gap D is formed between the magnetic tape T and the gap G1 between the core tips 6a and 7, and the gap G1
Cannot contact the magnetic tape T. In addition, when the filling resin 16 expands, the tips 6a of the winding cores 61 and 62 may also be extruded together. Even in such a case, the winding core tip 6a and I
A gap D is generated between the gap G1 between the tips of the cores 7 and the magnetic tape T.

When the gap D is generated in this way, the magnetic coupling between the read / write gap and the magnetic tape T is insufficient, resulting in a large magnetic loss. Therefore, the S / N is poor and the reading / writing efficiency is reduced.

The technical problem of the present invention is to solve the above problems in the conventional magnetic tape head and to make the frame and the core undeformable even when the test is performed under severe conditions.

[Means for solving problems]

FIG. 1 is an internal view of a frame for explaining the basic principle of the magnetic tape head according to the present invention. F is a non-magnetic frame, and the winding cores 61, 62 and the like are fixed by filling the winding part housing chamber with resin as in the conventional case.
In such a frame, between the winding cores 61 and 62 adjacent to the winding part accommodation chamber, the reinforcing part 19 filling the winding part accommodation chamber is provided on the tape receiving surface side of the core receiving wall 18 and the winding. It is formed integrally with the bottom of the compartment chamber. Also, the reinforcing portion
Groove (2 that connects between the winding chambers 81 and 82 divided by 19)
0) has been formed.

The magnetic tape head is completed by connecting and fixing the plurality of frames formed in this way to be integrated.

[Action]

In this way, the reinforcing portion 19 is formed on the tape receiving surface side of the core receiving wall 18
Side and the bottom part of the winding part accommodating chamber, the core receiving wall 18 on the tape sliding surface side is difficult to deform. Therefore, even if the resin filled in the winding portion accommodation chambers 81 and 82 expands, the core receiving wall 18 is not pushed out by the filled resin and deformed. Therefore, the problem that a gap is generated between the recording / reproducing gap and the magnetic tape T and the magnetic coupling between the magnetic tape T and the recording / reproducing gap is lowered is solved.
Since the winding portion accommodating chambers 81 and 82 divided by the reinforcing portion 19 are communicated with each other by the groove 20, the resin spreads to the two winding portion accommodating chambers 81 and 82 at the same time when the resin is filled. Therefore, filling can be performed easily and surely.

〔Example〕

Next, practical examples of how the magnetic tape head according to the present invention is embodied will be described. FIG. 2 is a view showing a frame F4 of the magnetic tape head according to the present invention, corresponding to FIG. 6, (a) is an inner view and (b) is a view (b) of (a).
FIG. On the core receiving wall 18 on the tape sliding surface side, gaps G1 and G2 for two tracks are formed.
Core receiving grooves 91a, 92a into which the two winding cores 61, 62 are inserted
And a shield plate insertion groove 10a is formed. Then, in the middle portion between the core receiving grooves 91a and 92a, a reinforcing portion 19 that fills the winding portion accommodation chamber is formed integrally with the bottom portion 8b of the winding portion accommodation chamber from the core receiving wall 18 side on the tape sliding surface side. ing. Therefore, the shield plate insertion groove 10a is also formed in the reinforcing portion 19. In the illustrated example, the winding part accommodation chamber is the reinforcing part.
It is divided into two, 81 and 82 by 19 and is in good shape. However, on the side opposite to the core receiving wall 18, the communication groove 20
When the resin is filled with the resin and the resin is filled with the resin, the resin can be easily spread to the two winding portion accommodating chambers 81 and 82 in one operation. Further, the two winding part accommodating chambers 81 and 82 are circular so that the machining can be easily performed. The shape of the winding part accommodating chambers 81 and 82 may be square as shown in FIG.

As described with reference to FIG. 7, the winding cores 61 and 62, the shield plate 3, the lead wire 11 and the like are mounted on the frame F4 having the reinforcing portion 19 as described above, and the epoxy resin or the like is filled and fixed. Then the frame is completed. Other frames F1, F2,
The strength of F3 can also be improved by providing the reinforcing portion 19 that divides the winding portion accommodation chamber into two. It is not always necessary to provide the reinforcing portions 19 on all the frames, and it is sufficient to implement the present invention only on the frames that are easily deformed.

[Effect of device]

As described above, according to the present invention, in the frame on which the winding cores 61 and 62 are mounted, the reinforcing portion 19 that fills the winding portion accommodation chamber is provided between the adjacent winding cores 61 and 62 on the tape sliding surface side. The core receiving wall 18 side and the winding portion accommodating chamber bottom portion 8b are integrally provided. Therefore, the strength of the core receiving wall 18 is improved, the resin filled in the winding portion accommodation chamber does not deform, and the problem of creating a gap between the recording / reproducing gap and the magnetic tape is solved. S / N of time improves. In addition, a reinforcement portion is provided between the two winding portion accommodation chambers 81 and 82.
The resin is not separated completely at 19, but is communicated at the groove 20, so that the resin filling operation can be easily performed.

[Brief description of drawings]

FIG. 1 is an inner view of a frame for explaining the basic principle of the magnetic tape head according to the present invention, FIGS. 2 and 3 are views showing an embodiment of the magnetic tape head according to the present invention, and FIG. FIG. 5 is an external view of a magnetic tape head, and FIG. 5 is a sectional view showing a winding part accommodation chamber of the magnetic tape head.
The figure shows one frame F4 in the magnetic tape head, and FIG. 7 shows the completed state of the frame F4.
The figure is a cross-sectional view of a main part showing a deformed state of a conventional magnetic tape head. In the figure, G1 and G2 are gaps, F1, F2, F3 and F4 are frames, 6, 61 and 62 are winding cores, 7 is an I core, 8, 81 and 82.
Is a winding chamber, 10 is a winding, 18 is a core receiving wall, 19 is a reinforcing portion, and 20 is a communication groove.

Claims (1)

[Scope of utility model registration request] 1. A plurality of non-magnetic frames (F) having a winding part housing chamber (8) for housing winding cores (61) (62) for a plurality of tracks, and winding cores (a) for a plurality of tracks. 61) (6
2) is inserted to form recording / reproducing gaps (G1) (G2), and the winding portion housing chamber (8) is filled with resin and fixed, and these frames (F) are connected and fixed. In the magnetic tape head integrally formed by combining the winding portion accommodating chambers (8) of the respective frames (F) with the winding portion accommodating chambers (8) between adjacent winding cores (61, 62). The reinforcing portion (19) for filling 8) is provided integrally with the core receiving wall (18) side on the tape sliding surface side and the bottom portion (8b) of the winding portion accommodating chamber, and is divided by the reinforcing portion (19). Winding part accommodation room (81) (8
2) A magnetic tape head characterized by having a groove (20) communicating between them.