JP2003257005A - Magnetic head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic head wherein no socket is necessary for a main substrate, connection is inexpensively made to the main substrate, and the main substrate is miniaturized. <P>SOLUTION: This magnetic head is provided with a bobbin 13 on which a coil 18 is wound, a terminal 16 formed integrally with the bobbin 13 and made conductive to the coil 18, and a lead wire 20 for connecting the terminal 16 to the outside. A hole 13a is formed in the bobbin 13, the tip of the terminal 16 is inserted into the hole 13a and, by inserting a connection section 21 disposed on the tip of the lead wire 20 into the hole 13a, the connector section 21 and the terminal 16 are fitted together. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head, and more particularly to a magnetic head electrical connection structure.

[0002]

2. Description of the Related Art A conventional magnetic head which is a full width erase head mounted on a general VTR device (hereinafter referred to as "device") will be described with reference to FIGS. The head portion 32 of the magnetic head 31 is composed of a plurality of parts including a front core 33, a coil bobbin (not shown), a connection terminal 34 integrated with the coil bobbin, and a back core (not shown). ing. The head portion 32 composed of such a plurality of parts is housed with the polished tape sliding contact surface 33a of the front core 33 exposed from the front surface of the case 35, and the head portion 32 is fixed in the case 35. It has become so.

A coil bobbin forming a part of the head portion 32 is made of a resin material and is formed in a vertically long substantially rectangular shape, and a coil having a conducting wire wound on one side is formed.
Further, below the coil bobbin, a pair of substantially L-shaped connection terminals 34, 34 are formed by insert molding or press fitting,
It is attached integrally to the coil bobbin. As shown in FIG. 10, the connection terminal 34 is made of an elongated metal having a rectangular cross section, and has one end 34a extending downward from the coil bobbin, and the other side protruding from the coil bobbin in the leftward lateral direction. It is composed of an end portion 34b.

In the coil bobbin housed in the case 35, a coil is wound, and an end portion of a conductive wire forming the coil is electrically connected to the other end portion 34b of the connection terminal 34 by soldering or the like. It has become. Below the case 35, a mounting arm 35a is formed so as to project in the horizontal (lateral) direction. A positioning pin 35b as shown in FIG. 9 is formed on the lower surface of the mounting arm 35a so as to project downward. One end portion 3 of the connection terminal 34 is provided below the mounting arm 35a in the figure.
The case 35 is formed to extend in the same direction as the extending direction of 4a,
A terminal holder portion 36 that restricts the movement of the one end portion 34a of the connection terminal 34 is formed.

The magnetic head 31 having the above-described structure is arranged on a chassis on which a rotating cylinder on the VTR device (not shown) side and a tape running system are arranged, and is wound on a tape cassette (not shown). Attached magnetic tape (not shown)
However, in the state where the tape is loaded and mounted on the rotary cylinder, the upstream side of the magnetic tape is brought into contact with the tape sliding contact surface 33a. In the contact state of the magnetic tape with the tape sliding contact surface 33a, the magnetic head 31
The full width data recorded on the magnetic tape can be erased selectively.

A magnetic head 31 arranged on a chassis 37 on the apparatus side will be described with reference to FIG. 10. The magnetic head 31 is positioned on the chassis 37 by a positioning pin 35b of a mounting arm 35a and is screwed. (Not shown)
Etc., and is attached to the chassis 37. A main board 38 is disposed below the chassis 37, and a socket portion 39 is attached to the main board 38. A connector (not shown) is built in the socket portion 39, and when the one end portion 34a of the connection terminal 34 is inserted into the connector, the connector and the connection terminal 34 are electrically connected. . Then, such a magnetic head 31 can be electrically connected to the main board 38 by simply inserting the one end portion 34 a of the connection terminal 34 into the socket portion 39.
The device assembling work can be simplified.

[0007]

However, in such a magnetic head 31, such a magnetic head 31 is mounted on the main substrate 38 with the socket portion 3.
9 and a connector are needed. Since this connector is a special connector for the magnetic head 31 and is expensive, it has been an obstacle to cost reduction. Further, the socket portion 39 requires a large space on the main board 38, and the position of the socket portion 39 on the main board 38 is fixed by the position of the magnetic head 31. Moreover, the degree of freedom in design is hindered when the size of the main board 38 is reduced.

The present invention solves this problem, and an object of the present invention is to provide a magnetic head which can be easily connected to a main substrate and which is easy to downsize.

[0009]

As a means for solving the above problems, a magnetic head of the present invention is a bobbin around which a coil is wound, and a terminal which is integrally formed on the bobbin and is electrically connected to the coil. A lead wire for connecting the terminal to the outside, forming a hole in the bobbin, inserting the tip of the terminal into the hole, and inserting the connector portion provided at the tip of the lead wire into the hole. By inserting, the connector part and the terminal are fitted together.

With this structure, the lead wire and the terminal can be electrically connected and the main board can be connected by the lead wire only by inserting the connector portion into the hole of the bobbin, so that the main board can be easily connected. Since the main board can be freely provided without fixing the position of the lead wire connection destination, the main board can be easily designed for miniaturization. Further, it is inexpensive because it does not require a connector member such as a socket.

Also, a bobbin around which a coil is wound, a terminal integrally formed with the bobbin and electrically connected to the coil,
A lead wire for connecting the terminal to the outside and a case for accommodating the bobbin are provided, a hole is formed in the case, the tip of the terminal is inserted into the hole, and the tip of the lead wire is provided. By inserting the connector portion into the hole, the connector portion and the terminal are fitted together.

With this configuration, the lead wire and the terminal can be electrically connected by simply inserting the connector portion into the hole of the case, and can be connected to the main board by the lead wire. Therefore, the main board can be easily connected. Since the main board can be freely provided without fixing the position of the lead wire connection destination, the main board can be easily designed for miniaturization. Further, it is inexpensive because it does not require a connector member such as a socket.

Further, a bobbin around which a coil is wound, a terminal integrally formed with the bobbin and electrically connected to the coil,
A lead wire for connecting the terminal to the outside, forming a hole in the bobbin, and inserting the tip of the terminal into the hole,
The inserted terminal is held elastic, and the tip of the lead wire is inserted into the hole to elastically attach the lead wire and the terminal.

With this structure, the lead wire and the terminal can be electrically connected by simply inserting the tip of the lead wire into the hole of the bobbin, and the main board can be connected by the lead wire. Can be connected to the board, and without fixing the position of the lead wire connection to the main board,
Since the main board can be freely provided, the design can be facilitated when the size of the main board is reduced. Further, since the lead wire is directly connected to the terminal of the magnetic head, no member other than the lead wire is required and the structure can be constructed at low cost.

Also, a bobbin around which a coil is wound, a terminal integrally formed with the bobbin and electrically connected to the coil,
A lead wire for connecting the terminal to the outside and a case for accommodating the bobbin are provided, the case has a through hole, and the terminal of the bobbin accommodated in the case is inserted into the through hole and inserted. The terminal is held elastic, and the tip of the lead wire is inserted into the through hole to elastically attach the lead wire and the terminal.

With this structure, the lead wire and the terminal can be electrically connected by simply inserting the tip of the lead wire into the through hole of the case, and the lead wire can be connected to the main board. Since it can be connected to the main board and can be freely provided on the main board without fixing the position of the lead wire connection destination, it is easy to design the main board for miniaturization.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The magnetic head of the present invention is shown in FIGS.
It will be described based on. First, a magnetic head according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in the exploded perspective view of 1., the magnetic head 10 is composed of a plurality of parts in the hold case 11.

The hold case 11 is integrally molded of synthetic resin such as polyacetal, and is formed in a hollow shape so that the front core 12, the coil bobbin 13, the back core 14 and the pressing member 15 are sequentially inserted therein. . Further, the front end of the hold case 11 is formed into a curved convex surface in conformity with the medium sliding contact surface made of the tape sliding contact surface on the front surface of the front core 12, and the upper surface has two terminals projecting upward from the coil bobbin 13. 16, 16,
Two through holes 17, 17 are formed to allow the front core 12 to be inserted in the same direction as the insertion direction. The front core 12 is formed in advance as a finished product so as to have a gap 12a in the center.

The coil bobbin 13 is integrally molded of synthetic resin so as to have a substantially rectangular shape, and a coil 18 is wound around a rectangular tube portion. At the top of the coil bobbin 13,
Two L-shaped terminals 16 and 16 are inserted and fixed so that the horizontal portions of the terminals 16 and 16 are directed rearward.
The ends of the windings are connected to the horizontal portions of the terminals 16 by soldering or the like. In addition, as shown in the partial cross-sectional side view of FIG.
A hole 13a is formed around the horizontal portion of 6, and a protrusion 13b is formed at the entrance of this hole 13a.

The back core 14 is a pair of front members 14
The front member 14a is formed in a U shape in cross section and has one front member 14a inserted into the coil 18 of the coil bobbin 13 and the front end face of each front member 14a is joined to the rear end face of the front core 12. The pressing member 15 is manufactured by pressing a metal plate, and includes the back core 14, the coil bobbin 13, and the front core 1.
2 has a spring portion 15a for pressing the front portion 2 and is mounted by elastically engaging the four engaging projections 15b with the engaging holes 19 formed in the side surface portion of the hold case 11. It

An electrical connection method of the magnetic head 10 thus constructed will be described. As shown in FIG. 3, a connector 21 made of a conductor is attached to the tip of a lead wire 20 for external drawing. This connector 21 has a tip 21a.
Is formed in a hollow shape so that the terminal 16 can be inserted therein, and a protrusion 21b is provided slightly in the middle from the tip 21a. Connect this connector 21 to the hole 1 of the coil bobbin 13.
When inserted into the connector 3a, as shown in FIG.
The terminal 16 is inserted into the hollow portion of the distal end 21 a of the No. 1. By providing this hole 13a, it serves as a guide for inserting the connector 21 and the workability is improved. Then, the projection 21b of the connector 21 and the projection 13b in the hole 13a of the coil bobbin 13 are fitted and prevented from coming off, and the lead wire 20 and the terminal 16 are electrically connected via the connector 21. Therefore, the assembling work is simplified and the main board can be easily connected.

The magnetic head 10 arranged on the chassis 22 on the apparatus side will be described with reference to FIG. 5. The magnetic head 10 is attached to the chassis 22 with screws (not shown) or the like. A main board 23 is disposed below the chassis 22, and the lead wires 2 are provided on the main board 23.
Two connecting parts 24 for connecting 0 are provided. The two connecting portions 24 occupy almost no space on the main board 23, and can be arranged anywhere on the main board 23, and the two connecting portions 24 may be separated from each other so that they can be freely designed. It has become. Then, when the lead wire 20 and the connecting portion 24 are bonded to each other with solder or the like, the main board 23 and the terminal 16 are electrically connected. A connection portion 24, which is a connector, may be provided on the main board 23 and connected to the lead wire 20. In this case, the main board 23
Space for the connector is required above, but the lead wire 20
The degree of freedom allows the main board 23 to be freely designed.

As a modification, instead of the hole 13a and the protrusion 13b of the coil bobbin 13, as shown in FIG. 6, the hold case 11 is provided with a hole 11a and a protrusion 11b, and the hold case 11 and the connector 21 are connected to each other. May be fitted together.

Next, the magnetic head 10 according to the second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 7 is a partial side sectional view of the magnetic head 10 according to the second embodiment of the present invention. The difference from the magnetic head 10 according to the first embodiment of the present invention is that the coil bobbin 13 has an upper portion. Holes are formed,
Within this hole, the terminal 16 is located as a pressing member. In the present embodiment, the terminal 16 is
It is bent into a shape of, for example, or a "shi". In addition, the hold case 11 has terminals 16
Through holes 17 are provided corresponding to the above, and through the through holes 17 of the hold case 11 into the holes of the coil bobbin 13,
When the lead wire 20 with the conductor at the tip exposed is inserted, the conductor at the tip of the lead wire 20 is pressed and attached to the bent terminal 16 so that the lead wire 20 and the terminal 16 are electrically connected. Has become. This magnetic head 1
The method of attaching the device 0 to the chassis 22 on the device side is the same as that in FIG. 5 of the first embodiment. The magnetic head according to the second embodiment does not require the connector 21 as compared with the magnetic head according to the first embodiment, and can be further reduced in cost.

The magnetic head 10 according to the third embodiment of the present invention will be described with reference to FIG. In the third embodiment, the same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. FIG. 8 is a partial side sectional view of the magnetic head 10 according to the third embodiment of the present invention. The difference from the magnetic head 10 according to the first embodiment of the present invention is that the hold case 11 has A through hole 17 into which the terminal 16 is inserted is provided, and the terminal 16 extending upward is located in the hold case 11 where the terminal 16 serves as a pressing member. In the present embodiment, the terminal 16
However, it is bent into a shape such as a "ku" shape or a "shi" shape. Then, when the lead wire 20 having the conductor at the tip exposed is inserted into the through hole 17, the conductor at the tip of the lead wire 20 is pressed and attached to the bent terminal 16, and the lead wire 20 and the terminal 16 are electrically connected. Are connected to each other. How to attach the magnetic head 10 to the chassis 22 on the device side is the same as that in FIG. 5 of the first embodiment. The magnetic head of the third embodiment does not require the connector 21 as compared with the magnetic head of the first embodiment, and can be made more inexpensive.

[0026]

As described above, the magnetic head of the present invention has a bobbin around which a coil is wound, a terminal integrally formed with the bobbin, and electrically connected to the coil, and a lead for connecting the terminal to the outside. A wire, and forming a hole in the bobbin or a case accommodating the bobbin, inserting the tip of the terminal into the hole, and inserting the connector portion provided at the tip of the lead wire into the hole. Since the connector portion and the terminal are fitted by doing so, the lead wire and the terminal are electrically connected by simply inserting the tip of the lead wire into the hole of the bobbin or the case, and Can be easily connected to the main board because it can be connected by a lead wire, and the main board can be freely provided without fixing the position of the lead wire connection destination. Design is likely to be.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a magnetic head of the present invention.

FIG. 2 is a partial side sectional view of the magnetic head according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a method of connecting lead wires of the magnetic head according to the first embodiment of the invention.

FIG. 4 is a diagram illustrating a method of connecting lead wires of the magnetic head according to the first embodiment of the invention.

FIG. 5 is a schematic view in which the magnetic head of the present invention is attached to a chassis on the apparatus side.

FIG. 6 is a partial side sectional view of a magnetic head of a modified example of the first embodiment of the invention.

FIG. 7 is a partial side sectional view of a magnetic head according to a second embodiment of the invention.

FIG. 8 is a partial side sectional view of a magnetic head according to a third embodiment of the invention.

FIG. 9 is a front view of a conventional magnetic head.

FIG. 10 is a schematic view in which a conventional magnetic head is attached to a chassis on the apparatus side.

[Explanation of symbols]

11 cases 12 front core 13 bobbins 13a bobbin hole 14 Back core 15 Pressing member 16 terminals 17 Through hole 18 coils 20 lead wires 21 connector 22 chassis 23 Main board

Claims (4)

[Claims] 1. A bobbin around which a coil is wound, a terminal integrally formed with the bobbin and electrically connected to the coil, and a lead wire for connecting the terminal to the outside are provided, and a hole is formed in the bobbin, The tip of the terminal is inserted into the hole, and the connector portion provided at the tip of the lead wire is inserted into the hole so that the connector portion and the terminal are fitted to each other. And a magnetic head. 2. A bobbin around which a coil is wound, a terminal integrally formed with the bobbin and electrically connected to the coil, a lead wire for connecting the terminal to the outside, and a case for accommodating the bobbin, A hole is formed in the case, the tip of the terminal is inserted into the hole, and the connector portion provided at the tip of the lead wire is inserted into the hole to fit the connector portion and the terminal. A magnetic head characterized by being adapted to each other. 3. A bobbin around which a coil is wound, a terminal formed integrally with the bobbin and electrically connected to the coil, and a lead wire for connecting the terminal to the outside, and a hole is formed in the bobbin, The tip of the terminal is inserted into the hole, the inserted terminal is held elastic, and the tip of the lead wire is inserted into the hole to elastically attach the lead wire and the terminal. A magnetic head characterized in that 4. A bobbin around which a coil is wound, a terminal formed integrally with the bobbin and electrically connected to the coil, a lead wire for connecting the terminal to the outside, and a case for housing the bobbin, The case has a through hole, the terminal of the bobbin housed in the case is inserted into the through hole, the inserted terminal is held elastic, and the tip of the lead wire is inserted into the through hole. The magnetic head is characterized in that the lead wire and the terminal are elastically attached by means of.