JPH05128416A - Magnetic head holder - Google Patents

Abstract

PURPOSE:To enable the production of the different magnetic head holders with the same stage by only cutting away unnecessary parts with cutting grooves by forming the cutting grooves along a direction parallel with a sliding surface behind the magnetic cores of the magnetic head holders. CONSTITUTION:The magnetic head holder 20 is constituted by forming the cutting grooves 22 on the magnetic head holder of a main flow type having about 9mm height. The holder 20 consists of zinc die casting, etc., and is so constituted that the holder can be easily cut by bending at the cutting grooves 22. The magnetic head holder is bent at the cutting grooves 22 to remove the holder end 28 before shifting to a tape guide mounting stage if the required magnetic head holder is of a 6mm type. The versatility of the magnetic head holder is enhanced and the production cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head holder incorporated in a magnetic head for audio equipment, and has a high versatility.

[0002]

2. Description of the Related Art As an example of a magnetic head used for audio of a cassette tape recorder, those shown in FIGS. 2 and 6 are known. 2 and 6, reference numeral 1 indicates a magnetic head. This magnetic head 1
Shield case 2 made of permalloy, etc. in the shape of a rectangular parallelepiped box
Inside, the magnetic cores 3, 3, for recording, reproducing, erasing, etc.
A magnetic head holder 14 is installed which is provided with 3, 3 and shield plates 4, 4, 4 for shutting off the magnetic cores 3, 3, 3, 3 from each other. The sliding contact surface 12 on the front surface of the magnetic head 1 is swelled in the direction in which the magnetic tape 5 slides. Further, the front ends of the magnetic cores 3, 3, 3, 3 and the shield plates 4, 4, 4 are exposed at the sliding contact surface 12, and the bobbin around which the coil is wound is provided at the rear portion of the magnetic cores 3, 3, 3, 3. 16, 16, 16, 16 are provided, and each bobbin 16, 1
6, 16 and 16 have terminals 18 and 1 connected to an electric circuit
8, 18, 18 are provided. Further, the space inside the shield case 2 is filled with a resin material. Further, the magnetic head 1 is fixed to the mount 6. The mounting base 6 includes the tape guides 7 and 8 and the tape guides 7 and 8.
The frame 9 is provided at the lower part of the frame, and the mounting portions 10 and 11 are provided on both left and right side surfaces of the frame 9. Further, the tape guides 7 and 8 are formed with tape sliding portions 7a and 8a for guiding the running of the magnetic tape 5.

[0003]

By the way, depending on the intended use of the magnetic head, for example, the intended use for car stereos, mini cassette recorders, etc., or by designing a new model, there are many types of magnetic fields. Heads are required and in production. The magnetic head holder also needs to be compatible with each of these types of magnetic heads. Generally, the mainstream type is a magnetic head holder 14 of the type shown in FIG. 6 having a height of about 9 mm.
A magnetic head holder 15 of the type shown in FIG. 7 having a height of about 6 mm is produced. In the magnetic head 1a of FIG. 7 as well as the magnetic head 1 of FIG. 6, the magnetic core 3, the shield plate 4, the bobbin 17, and the terminal 19 are mounted on the magnetic head holder 15, and the magnetic head holder 15 includes the shield case 2 It is installed inside.

In the manufacturing process of the magnetic head 1, after the magnetic core 3 and the shield plate 4 are assembled in the magnetic head holder, the magnetic head holder is assembled in the shield case 2 and the like, and the final inspection is performed. Up to this point, the above-mentioned two types of magnetic head holders 14 and 15 require separate parts, production facilities, jigs and separate production lines, respectively. Therefore, the production efficiency is poor, which is a factor of increasing the product cost. It was

The present invention has been made to solve the above problems, and a magnetic head holder which can reduce the production line and can reduce the product cost even in the case of manufacturing many types of magnetic head holders. Is provided.

[0006]

In the magnetic head holder of the present invention, a magnetic core whose front end is exposed at the sliding contact surface of the magnetic head is installed and installed in a shield case. In the head holder, a cutting groove is formed behind the magnetic core of the magnetic head holder along a direction parallel to the sliding contact surface.

[0007]

According to the magnetic head holder of the present invention, when different types of magnetic head holders are required, a cutting groove is formed in one type of magnetic head holder, and the cutting groove does not require the magnetic head holder if necessary. The other magnetic head holder can be manufactured only by cutting and removing a part. Therefore, different magnetic head holders can be manufactured by almost the same manufacturing process.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a magnetic head holder of the present invention is shown in FIG.
Will be described below. FIG. 1 shows the magnetic head holder 20 with the magnetic cores 3 and 3 and the shield plate 4 attached only to the left half of the drawing. The magnetic head holder 20 of this embodiment is characterized in that its schematic shape is similar to that of the magnetic head holder 14 of the type shown in FIG. 6 and that a cutting groove 22 is formed. The magnetic head holder 20 having a bent plate material includes
A predetermined magnetic core 3, a shield plate 4, and a bobbin around which a coil is wound are mounted. Then, a combination of two magnetic head holders 20 facing each other so as to include the mounted magnetic cores 3, ... And shield plates 4 ,. The magnetic head 1 as shown in 2-5 is constructed. Incidentally, FIG. 3 is a view of the magnetic head as seen from its sliding contact surface side, and the right half thereof is seen through the upper surface of the shield case 2. 4 is a side view of the magnetic head 1, which is a combination of the BB sectional view (right half) of FIG. 3 and the CC sectional view (left half) of FIG. Further, FIG. 5 is a sectional view taken along the line AA of FIG. The cutting groove 22 is attached to the magnetic core 3, ...
It is formed behind (downward in FIG. 1), and is formed at a predetermined position by the required magnetic head. The cutting groove 22 is formed along a direction parallel to the sliding contact surface of the magnetic head (horizontal direction in FIG. 1), and its width and depth have no influence on normal processes and use, If there is a bending cutting step in the subsequent step, it is designed so that it can be bent easily during the bending cutting step, and therefore it depends on the material of the magnetic head holder 20. When the magnetic head holder 20 is made of zinc die-cast and the thickness thereof is 1 to 1.5 mm as in this embodiment, the width of the cutting groove 22 is about 0.1 to 0.5 mm and the depth is. , 0.5-1 mm is suitable. Reference numerals 24, 24, ... Are core mounting grooves for mounting the magnetic core 3, and reference numerals 26, 26, 26, 26 are bobbin positioning grooves for mounting bobbins.

Next, a manufacturing process of a magnetic head using the magnetic head holder 20 will be described. First, this cutting groove 2
2, the magnetic head holder 20 formed with the magnetic core 3, ...
・ Install the shield plate 4, ... Then, after the mating surfaces of the two magnetic head holders 20 are polished, a bobbin around which a coil is wound is mounted, the magnetic head holders are combined so as to include the magnetic core 3 and the shield plate 4, and this is further shielded. Installed in 2. Further, the inside is filled with resin. In the next sliding contact surface polishing step, the sliding contact surface is polished and the depth of the magnetic gap is adjusted. Next, if the required magnetic head holder is the one shown in FIG. 6 (9 mm type), the length of the magnetic head holder has already been matched, so that the tape guide or the like can be directly welded to the shield case or the like. Attach to the side. If the required magnetic head holder is the one shown in FIG. 7 (6 mm type), here, the cutting groove 22
After removing the holder end portion 28 on the rear side, the process proceeds to the next step (tape guide attachment). The removal of the holder end portion 28 can be easily performed by bending at the cutting groove 22 formed. In this way, the magnetic head as shown in FIGS. 2 and 3 and FIGS. 4 and 5 (9 mm type) or FIG. 7 (6 mm type) is manufactured, and finally it is commercialized through the measurement inspection.

By using the magnetic head holder of this embodiment, it is possible to manufacture two types of magnetic head holders only by the presence or absence of the bending cutting process of the cutting groove in the rear manufacturing process, so that most of the components can be manufactured. , Production equipment, jigs and tools can be used. Therefore, the manufacturing cost can be reduced. Furthermore, since the production line can also be used,
Allows mixed production of multiple types of magnetic head holders.
It is possible to absorb fluctuations in the production quantity of multiple types, improve the facility utilization rate, and significantly reduce product costs.

In this embodiment, the 9 mm type and the 6 m type are used.
It can be applied to two types for m type, but it is needless to say that it is not limited to this length. Furthermore, by increasing the number of cutting grooves, more types of magnetic head holders can be produced without increasing the manufacturing cost.

[0012]

According to the magnetic head holder of the present invention,
Even when a plurality of types of magnetic head holders having different sizes are required, a cutting groove is formed in the larger type magnetic head holder, and unnecessary portions are cut and removed by the cutting groove as needed. Therefore, the versatility of the magnetic head holder can be improved, and most parts, production equipment, and jigs can be used. Therefore, the manufacturing cost can be reduced. Furthermore, since the production line can also be used, mixed production of multiple types of magnetic head holders is possible, and fluctuations in the production quantity of multiple types can be absorbed,
In addition, the facility utilization rate is improved, which enables a significant reduction in product cost.

[Brief description of drawings]

FIG. 1 is a side view of a magnetic head holder of this embodiment.

FIG. 2 is a perspective view of a magnetic head.

FIG. 3 is a front view of the magnetic head of this embodiment.

4 is a combination of the BB side sectional view and the CC side sectional view of FIG. 3;

5 is a sectional view taken along the line AA of FIG.

6 is a side sectional view of a conventional magnetic head, and FIG.
FIG.

FIG. 7 is a side sectional view of another type of magnetic head.

[Explanation of symbols]

 1 Magnetic Head 1a Magnetic Head 2 Shield Case 3 Magnetic Core 4 Shield Plate 5 Magnetic Tape 12 Sliding Contact Surface 14 Magnetic Head Holder 15 Magnetic Head Holder 20 Magnetic Head Holder 22 Cutting Groove

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[Procedure amendment]

[Submission date] October 27, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Detailed explanation of the invention

[Correction method] Change

[Correction content]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head holder incorporated in a magnetic head for audio equipment, and has a high versatility.

[0002]

2. Description of the Related Art As an example of a magnetic head used for audio of a cassette tape recorder, those shown in FIGS. 2 and 9 are known. 2 and 9, reference numeral 1 indicates a magnetic head. This magnetic head 1
Shield case 2 made of permalloy, etc. in the shape of a rectangular parallelepiped box
Inside, the magnetic cores 3, 3, for recording, reproducing, erasing, etc.
A magnetic head holder 14 is installed which is provided with 3, 3 and shield plates 4, 4, 4 for shutting off the magnetic cores 3, 3, 3, 3 from each other. The sliding surface 12 on the front surface of the magnetic head 1 has a shape which is slightly expanded in the direction in which the magnetic tape 5 slides. Further, the front ends of the magnetic cores 3, 3, 3, 3 and the shield plates 4, 4, 4 are exposed at the sliding contact surface 12, and the bobbin around which the coil is wound is provided at the rear portion of the magnetic cores 3, 3, 3, 3. 16, 16, 16, 16 are provided, and each bobbin 1
6,16,16,16 are provided with terminal pins 18,18,18,18 for connecting to an electric circuit. Further, the space inside the shield case 2 is filled with a resin material. Furthermore, as shown in FIG.
It is fixed to the mount 6. The mounting base 6 includes the tape guides 7 and 8, a frame body 9 provided below the tape guides 7 and 8, and mounting portions 10 and 1 provided on both left and right side surfaces of the frame body 9.
It consists of 1. Further, the tape guides 7 and 8 have tape sliding portions 7a and 8a for guiding the running of the magnetic tape 5.
Are formed.

[0003]

By the way, depending on each use of the magnetic head, for example, the use for a car stereo, a mini cassette recorder, or the like, or a new model is designed, there are many types of magnetic heads. Heads are required and in production. The magnetic head holder also needs to be compatible with each of these types of magnetic heads, but in general, the mainstream type is a magnetic head holder 14 of the type shown in FIG. 9 whose height is about 9 mm.
Then, a magnetic head holder 15 of the type shown in FIG. 10 having a height of about 6 mm is produced. Magnetic head 1a of FIG.
In the same manner as the magnetic head 1 of FIG. 9, the magnetic head holder 15, the magnetic core 3, the shield plate 4, the bobbin 17,
The terminal pin 19 is mounted, and the magnetic head holder 15 is installed in the shield case 2a.

In the manufacturing process of the magnetic head 1, after the magnetic core 3 and the shield plate 4 are assembled in the magnetic head holder, the magnetic head holder is assembled in the shield case 2 and the like, and the final inspection is performed. Up to this point, the two different types of magnetic head holders 14 and 15 require separate parts, production equipment, jigs and tools, and separate production lines. Therefore, the production efficiency is low, which causes a rise in product cost.

The present invention has been made to solve the above problems, and a magnetic head holder which can reduce the production line and can reduce the product cost even in the case of manufacturing many types of magnetic head holders. Is provided.

[0006]

In the magnetic head holder of the present invention, a magnetic core whose front end is exposed at the sliding contact surface of the magnetic head is installed and installed in a shield case. In the head holder, a cutting groove is formed behind the magnetic core of the magnetic head holder along a direction parallel to the sliding contact surface.

[0007]

According to the magnetic head holder of the present invention, when different types of magnetic head holders are required, a cutting groove is formed in one type of magnetic head holder, and the cutting groove does not require the magnetic head holder if necessary. The other magnetic head holder can be manufactured only by cutting and removing a part. Therefore, different magnetic head holders can be manufactured by almost the same manufacturing process.

[0008]

[Embodiment 1] An embodiment of a magnetic head holder of the present invention will be described below with reference to FIG. FIG. 1 shows the magnetic head holder 20 with the magnetic cores 3 and 3 and the shield plate 4 attached only to the left half of the drawing. The magnetic head holder 20 of the present embodiment has a schematic shape similar to that of the magnetic head holder 14 of the type shown in FIG. 9, but is characterized in that the magnetic head holder 20 is provided with a cutting groove 22. To do. The substantially L-shaped magnetic head holder 20 includes a predetermined magnetic core 3, a shield plate 4,
And a bobbin around which a coil is wound is mounted. And
A pair of magnetic head holders 20 that are assembled so as to face each other so as to include the mounted magnetic cores 3, ... And shield plates 4 ,.
The magnetic head 1 as shown in FIGS. Incidentally, FIG. 3 is a view of the magnetic head as seen from its sliding contact surface side.
The right half is a transparent view of the upper surface of the shield case 2. 4 is a side view of the magnetic head 1, which is a combination of the BB sectional view (right half) of FIG. 3 and the CC sectional view (left half) of FIG. Furthermore, FIG.
FIG. 4 is a sectional view taken along the line AA of FIG. 3. The cutting groove 22 is formed behind (on the lower side in FIG. 1) the magnetic cores 3 to be mounted, and is formed at a predetermined position corresponding to a desired magnetic head. The cutting groove 22 is formed along a direction parallel to the sliding contact surface of the magnetic head (in FIG. 1,
Laterally) formed. The width and depth of the cutting groove 22 have no influence on the normal process or use, but if there is a bending cutting process in the subsequent process, it is designed so that it can be easily bent at that time. Therefore, it also depends on the material of the magnetic head holder 20. For example, when the magnetic head holder 20 is made of zinc die casting and the plate thickness thereof is 1 to 1.5 mm, the width of the cutting groove 22 is 0.
The depth is preferably about 1 to 0.5 mm and the depth is preferably about 0.5 to 1 mm. Reference numerals 24, 24, ... Are core mounting grooves for mounting the magnetic core 3, and reference numerals 26, 26, 2
Reference numerals 6 and 26 are bobbin positioning grooves for mounting the bobbin.

Next, a manufacturing process of a magnetic head using the magnetic head holder 20 will be described. First, this cutting groove 2
2 is formed on the magnetic head holder 20 on which the magnetic core 3,
3, ... and shield plates 4, 4 ,. And
After polishing the mating surfaces of the pair of magnetic head holders 20,
A bobbin around which a coil is wound is mounted, a magnetic head holder is combined so as to include the magnetic core 3 and the shield plate 4, and this is further installed in the shield case 2. Further, the magnetic head holder is fixed by filling the inside of the shield case 2 with resin from the rear part. At this time, the coil wound around the base of the terminal pin 18 is also covered with the resin. In the next sliding contact surface polishing step, the sliding contact surface is polished and the depth of the magnetic gap is adjusted. Next, if the desired magnetic head holder is the one shown in FIG. 9 (9 mm type), the length of the magnetic head holder has already been adapted, so that a tape guide or the like can be directly attached to the side surface of the shield case by welding or the like. Install. If the desired magnetic head holder is the one shown in FIG. 10 (6 mm type), here, the cutting groove 22 is used.
After removing the holder end portion 28 on the rear side, the process proceeds to the next step (tape guide attachment). The holder end portion 28 can be easily removed by bending and cutting in the formed cutting groove 22 (bending cutting step). 2 and 3,
And Figures 4 and 5 (9 mm type) or Figure 10 (6 mm
A magnetic head as shown in (Type) is manufactured, and finally, it is commercialized through measurement and inspection.

If the magnetic head holder of this embodiment is used, two types of magnetic head holders can be manufactured simply by adding a bending cutting step of the cutting groove during the manufacturing process. Therefore, most parts, production equipment, and jigs and tools can be used, and the manufacturing cost can be reduced. In addition, since the production line can also be used, mixed production of multiple types of magnetic head holders is possible, fluctuations in the production quantity of multiple types can be absorbed, and the facility operation rate is improved, enabling a significant reduction in product cost. It is what

In this embodiment, the 9 mm type and the 6 m type are used.
It can be applied to two types for m type, but is not limited to this length as a matter of course, and a cutting groove can be formed at an appropriate position based on required specifications. Further, the number of cutting grooves is not limited to one, and by increasing the number of cutting grooves as needed, more types of magnetic head holders can be produced without increasing the manufacturing cost.

[Embodiment 2] The cutting groove is formed on the inner surface of the magnetic head holder 20 as shown in FIG. 4, and the magnetic head holder 21 of the magnetic head 30 shown in FIG.
As described above, the cutting groove 23 may be formed on the outer surface of the magnetic head holder 21. Further, the cutting groove may be formed in a triangular shape in cross section as shown in FIG. 6, instead of being formed in a rectangular shape in cross section as shown in FIG. Even with this magnetic head holder 21, the magnetic head is manufactured through the steps of installing this in the shield case 2 and filling resin around it, as in the first embodiment. At this time, when the desired magnetic head is a 9 mm type, the shield case 2 covers the cutting groove 23 as shown in FIG.
Move to the next step. When the desired magnetic head is a 6 mm type, when the magnetic head holder 21 is installed in the shield case 2, the cutting groove 23 is located at the lower end of the shield case 2 as shown in FIG. In this state, when the holder end 29 is bent outward (in the direction of the arrow) along the cutting groove 23, the holder end 29 is cut off from the magnetic head holder 21, and the magnetic head holder 21 is, as shown in FIG.
6 mm type magnetic head 30a (shield case 2
The magnetic head holder 21a conforms to a). In the magnetic head holder 21 of the second embodiment, the cutting groove 23 is formed on the outer surface of the magnetic head holder 21 in a triangular shape in cross section, so that the holder end 29 can be easily bent outward. In the manufacturing process, the bending cutting process of the cutting groove 23 is performed after the magnetic head holder 21 is assembled in the shield case 2 and filled with resin. At this time, when the holder end 29 is bent inward, the terminal pin 18 is bent. It is preferable that the holder end 29 is bent outward so that it may be damaged. Therefore, in the case of the magnetic head holder 21 of the second embodiment, the holder end 29 is easily bent and cut outward by the cutting groove 23 without damaging the terminal pin 18 to remove a different type of magnetic head holder. It can be manufactured.

As described above, the shape of the cutting groove has no influence on the normal process or use, but if there is a bending and cutting process in the subsequent process, it can be easily bent at that time. As long as it is possible, it is not limited to the rectangular or triangular cross section, and various shapes can be adopted.

[0014]

According to the magnetic head holder of the present invention,
Even when multiple types of magnetic head holders with different sizes are required, a cutting groove is formed in one of the larger types of magnetic head holders, and unnecessary parts are cut with that cutting groove as needed. Since the other magnetic head holder is manufactured by removing the magnetic head holder, the versatility of the magnetic head holder can be improved and most parts, production equipment, and jigs can be used. Therefore, the manufacturing cost can be reduced. In addition, since the production line can also be used, mixed production of multiple types of magnetic head holders is possible, fluctuations in the production quantity of multiple types can be absorbed, and the facility operation rate is improved, enabling a significant reduction in product cost. It is what

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a side view of a magnetic head holder of this embodiment.

FIG. 2 is a perspective view of a magnetic head.

FIG. 3 is a front view of the magnetic head of the first embodiment.

4 is a combination of the BB side sectional view and the CC side sectional view of FIG. 3;

5 is a sectional view taken along the line AA of FIG.

FIG. 6 is a side sectional view of a magnetic head according to a second embodiment.

FIG. 7 is a side sectional view showing a magnetic head of a 6 mm type magnetic head before bending and cutting in Example 2;

FIG. 8 is a side sectional view of a 6 mm type magnetic head.

9 is a side sectional view of a conventional magnetic head, and FIG.
FIG.

FIG. 10 is a side sectional view of another type of magnetic head.

[Description of Reference Signs] 1 magnetic head 1a magnetic head 2 shield case 2a shield case 3 magnetic core 4 shield plate 5 magnetic tape 12 sliding contact surface 14 magnetic head holder 15 magnetic head holder 20 magnetic head holder 21 magnetic head holder 21a magnetic head holder 22 cutting groove 23 cutting groove 30 magnetic head 30a magnetic head

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

[Figure 10]

Claims (1)

[Claims] 1. A magnetic head holder constituting a magnetic head by mounting a magnetic core, the front end of which is exposed on a sliding contact surface of the magnetic head, and installing the magnetic core in a shield case. A magnetic head holder, characterized in that a cutting groove is formed on a rear side thereof along a direction parallel to the sliding contact surface.