JPH04121004U - magnetic head - Google Patents

Abstract

(57) [Summary] [Purpose] To join a back core to a front core with a simple structure using a spring member. [Configuration] Bobbin 12A, 12 fitted to front core 2
A tongue piece portion 10 that is inserted into the insertion holes 15A, 15B of B and comes into pressure contact with the front core 2 and bobbins 12A, 12B.
A, 10B, and a core holding part 11 which is bent into a substantially L shape from the tongue part and presses the back core 9 against the end side surface of the front core 2 are integrally formed into the spring member 8 to hold the back core. It has a structure in which it is joined to the front core.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a floppy disk device used as an external storage device for computers. Regarding floppy heads for desktop use or magnetic heads that can be used for other purposes. .

0002

[Conventional technology]

Conventionally, a magnetic head connects a back core to a front core fixed to a slider. In this case, a U-shaped spring member 21A as shown in FIG. 6 is used to attach the front core 2. There was a structure in which the back core 9 was pressed and held on the side surface of the end portion. The U-shaped spring member 21 A is formed with a core holding portion 22 that is curved toward the side that presses the back core 9. The front core 2 and the back core 9 are held in pressure contact with each other by their elastic force.

0003 Further, the U-shaped spring member 21B shown in FIG. Core holding portions 22 for pressure-clamping are formed only at both ends.

0004

[Problem that the idea aims to solve]

By the way, the back core 9 is connected to the front core using the U-shaped spring members 21A and 21B. In the case of the conventional structure in which the back core 9 is pressed against the side surface of the front core 2, Attach the U-shaped spring members 21A and 21B from above while holding them down with a jig, etc. There must be. In other words, the back core 9 is held when the U-shaped spring member is attached. It requires a support means for the operation, which has the disadvantage of poor workability.

[0005] In addition, the insertion hole of the bobbin that is fitted into the front core 2 is the same as the thickness of the front core. The bobbin is slightly larger than the bobbin, and if you just insert it as is, the bobbin will wobble. This can lead to an unstable condition. Therefore, the bobbin is positioned and supported and stabilized. A separate means was required for this purpose.

[0006] Furthermore, when using a bobbin with terminals, it is necessary to There is also a problem in that the terminal block that has been attached to the terminal block obstructs the installation of the U-shaped spring members 21A and 21B. Ta.

[0007] In view of the above points, the present invention is designed to ensure that the back core is securely attached to the side of the end of the front core. In addition to joining the parts with good workability, the bobbin to be fitted to the front core is positioned. The purpose of the present invention is to provide a magnetic head capable of

[0008]

[Means to solve the problem]

In order to achieve the above purpose, the present invention has a front core fixed to a slider. In the magnetic head that joins the back core, the bobbin fitted to the front core is a tongue piece that is inserted into the insertion hole and comes into pressure contact with the front core and the bobbin; and the tongue piece. The back core is bent in a substantially L shape from the front core to the end side of the front core. The back core is held together by a spring member that integrally includes a core holding part that presses against the surface. It has a configuration in which it is joined to the front core.

[0009]

[Effect]

The magnetic head of the present invention has a tongue portion and a substantially L-shaped bend from the tongue portion. Using a spring member that has a core holding part integrally attached to the front core, Insert the tongue piece into the insertion hole of the bobbin, and insert the back core into the end of the front core. It can be pressed between the side surface of the end portion and the core holding portion to be pressure-welded to the side surface of the end portion. The spring member is used to position the bobbin and the front of the back core. Bonding to the core becomes possible. For this reason, a separate hand for traditional bobbin positioning is required. There is no need for a step, and the back core can be connected between the spring member and the front core. This can be done easily by simply pushing in from above, which improves workability compared to the conventional structure Cost reduction can be achieved. Furthermore, a bobbin with a terminal can be used as the bobbin. , an FPC (flexible printed circuit board) connected to a terminal integrated with a positioned bobbin. It is also easier to align the

0010

【Example】

Embodiments of the magnetic head according to the present invention will be described below with reference to the drawings.

[0011] 1 to 4, 1 is a slider that houses the head body, and 2 is a slider for housing the head body. This is the front core of the head body that is housed and fixed inside the head. Slider 1 is It has a recess 3 for accommodating the head main body with a large opening on the top surface, and a magnetic recording medium. Two rails 4A and 4B are formed on the bottom facing the floppy disk as a body. A window 5 through which the front core 2 is exposed is formed in one rail 4A. Ru. The front core 2 includes a center core portion (I-shaped core portion) 6 and a pair of side core portions. (L-shaped core part) 7A and 7B are joined together, and as shown in Figure 3, the joined part is the window 5. Glass 20 is filled in the required portions to regulate the track width. , a recording/reproducing gap Gr between the center core part 6 and the side core part 7A, and a center core part 7A. An erase gap Ge is formed between the outer portion 6 and the side core portion 7B.

0012 The bobbins 12A and 12B fitted in the side core portions 7A and 7B respectively have A recording/reproducing winding and an erasing winding are wound around the winding, and each end of both windings is attached to a bobbin. Terminal pin 1 of terminal block 13 integrally formed on the upper surface of 12A and 12B, respectively. Connected to 4. The side core portions 7A, 7 are located at the center of the bobbins 12A, 12B. Rectangular insertion holes 15A and 15B are formed for inserting B. The insertion hole 15A and 15B are slightly larger than the outer circumference of the side core parts 7A and 7B that are inserted. It is formed.

[0013] A square rod-shaped back core 9 is attached to the end side surface of the front core 2 by a spring member 8. are pressure welded. The spring member 8 is made of metal and has bows at both ends as shown in FIG. The tongue portions 10A and 10B are curved in a shape, and the tongue portions have a substantially L shape from the upper end thereof. The core holding part 11 bent in a shape is integrally molded, and the above-mentioned Insert the tongue pieces into the insertion holes 15A, 15B of the bobbins 12A, 12B from the opposite side of the terminal block 13. Sections 10A and 10B are inserted. As a result, the upper part of bobbins 12A and 12B The core holding part 11 is narrower than the thickness of the back core 9 than the side surface of the front core end. The positions are separated by an interval. Then, the back core 9 is attached to the front core 2. Push it between the core holding part 11 and the front core 2 so as to press it against the side surface of the end. . The tongue pieces 10A, 10B inserted into the insertion holes 15A, 15B are Insert the inner wall surfaces of the insertion holes 15A and 15B on the terminal block 13 side into the side core parts 7A and 7B, respectively. The bobbins 12A and 12B are brought into close contact with each other to prevent them from wobbling, and are kept in the head storage recess 3. Position the bobbin stably.

[0014] In addition, as in the above embodiment, a bobbin with a terminal provided with the terminal block 13 is used. Therefore, in order to ensure the positioning of bobbins 12A and 12B, the terminal pin 14 is also FPC (Flexible Print Circuit) can be fixed in a fixed position, which was difficult in the past. This makes it possible to fix (position) the (cut) in a fixed position.

[0015] Note that the spring member 8 is attached to the front core 2 and back core 9 that constitute the head core. It can be used as a grounding terminal.

[0016] In addition, in FIG. 5, a spring portion for joining the back core to the front core is shown. An example of a modification of the material is shown. In this case, the spring member 8A holds the core holding portion 11 only at both ends. It was formed. The function and effect are similar to those of the spring member 8 described above.

[0017]

[Effect of the idea]

As explained above, according to the magnetic head of the present invention, a single spring member can move the bobbin. This allows for positioning as well as joining the back core to the front core. , no separate means for bobbin positioning is required, and the number of parts can be reduced. Ru. The back core can be joined by simply pushing it from above between the spring member and the front core. It is easy to install, and the back core can be installed automatically, making the work easier than with conventional structures. This improves performance and reduces costs. Furthermore, a bobbin with a terminal is used as the bobbin. There is also the advantage that the terminal block does not interfere with back core bonding even if the terminal block is used.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a magnetic head according to the present invention.

FIG. 2 is a sectional view of the same side.

FIG. 3 is a bottom view of the same part.

FIG. 4 is a perspective view showing a spring member used in an example.

FIG. 5 is a perspective view showing a modification of the spring member.

FIG. 6 is a perspective view showing a conventional example for joining a back core to a front core.

FIG. 7 is a perspective view showing another conventional example.

[Explanation of symbols]

1 slider 2 Front core 3 Head body storage recess 6 Center core part 7A,7B Side core part 8,8A Spring member 9 back core 10A, 10B tongue piece part 11 Core holding part 12A, 12B bobbin 15A, 15B insertion hole

Claims (1)

[Scope of utility model registration request] 1. A magnetic head that joins a back core to a front core fixed to a slider, comprising: a tongue piece that is inserted into an insertion hole of a bobbin fitted to the front core and comes into pressure contact with the front core and the bobbin; The back core is joined to the front core by a spring member that is integrally formed with a core holding part that is bent in a substantially L shape from the tongue part and presses the back core against the end side surface of the front core. magnetic head.