JPH0559601U - Rotating magnetic head device - Google Patents

Abstract

(57) [Summary] [Purpose] When electrically connecting the magnetic head and the rotary rotary transformer, the complexity of the wiring process is eliminated and the appearance is not unsightly. A flexible substrate 33 attached to an elastic plate 39 is provided on a rotary side rotary transformer 22 which is a lower surface side of a rotary drum 24, and a bending portion 33A which is one end of the flexible substrate 33 is provided on a base of a magnetic head 28 by its pressing force. The rotary side rotary transformer 2 is attached to the other end while being pressed against the substrate 30.
The second transformer wire 38 is soldered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary magnetic head device applicable to video tape recorders, digital audio tape recorders, and the like.

[0002]

[Prior Art]

 As a rotary magnetic head device such as a video tape recorder and a digital audio tape recorder, a structure as shown in FIG. 4 is conventionally known. A rotary drum 1 is rotatably provided as an upper drum so as to face above a fixed drum (not shown) as a lower drum, and a magnetic head 4 is screwed on the lower surface side of the rotary drum 1. It is attached by 5. A head height adjusting spacer 3 is interposed between the magnetic head 4 and the rotary drum 1, and the tip of the height adjusting screw 2 is screwed into the rotary drum 1 so that the tip of the height adjusting screw 2 abuts on the magnetic head 4. This allows the height of the magnetic head 4 to be adjusted.

Two magnetic heads 4, which are used as the first and second channels, are attached at symmetrical positions about the rotation axis. A wiring board 7 is attached to the upper surface side of the rotating drum 1, and the lead wire 6 drawn from the coil end of the magnetic head 4 is soldered to the electrode 11 on the wiring board 7 as shown in the plan view of FIG. Then, the lead wire 8 is soldered to the rotary rotary transformer 9 via the electrode 11. FIG. 6 shows a bottom view of the rotary drum 1, and FIG. 7 shows a circuit diagram of a connection state between the magnetic head 4 and the rotary transformer having the rotary rotary transformer 9 and the fixed rotary transformer 10.

[0004]

[Problems to be solved by the device]

 By the way, in the conventional rotary magnetic head device, when electrically connecting the magnetic head 4 and the rotary side rotary transformer 9, the magnetic head 4 is connected to the wiring board 7 provided on the upper surface side of the rotary drum 1. Since the lead wire 6 and the lead wire 8 from the rotary rotary transformer 9 are connected by soldering, there is a problem that the wiring process becomes complicated and the appearance is unsightly.

The present invention has been made to solve the above problems, and a rotary magnetic head device is provided in which the electrical connection between the magnetic head and the rotary rotor transformer is made on the lower surface side of the rotary drum. It is intended to provide.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises a rotary rotary transformer that rotates integrally with a rotary drum, and a fixed rotary transformer fixed to a fixed drum, and a magnetic head is attached to the rotary drum. In the rotary magnetic head device, a flexible substrate attached to an elastic plate is provided on the rotary rotary transformer, and one end of the flexible substrate is pressed against the base substrate of the magnetic head and the other end of the rotary rotary transformer is attached. The feature is that the transformer wire is soldered to achieve conduction.

[0007]

[Action]

 One end of the flexible substrate attached to the elastic plate provided on the rotary rotary transformer is pressed against the base substrate of the magnetic head, and the other end is connected to the transformer wire of the rotary rotary transformer by soldering. This allows electrical connection between the magnetic head and the rotary rotary transformer on the lower surface side of the rotary drum.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the rotary magnetic head device of the present invention. Reference numeral 15 is a fixed drum as a lower drum, which is fixed to an appropriate immovable portion. A hole 26 in the direction of the center axis of the fixed drum 15 is shown. The rotary shaft 16 is rotatably supported in the interior thereof via a bearing 27. Further, the stator 18 of the motor 17 is fixed to the lower surface side of the fixed drum 15, and the rotor 19 of the motor 17 is fixed by being pressed into the rotating shaft 16. As a result, the rotary shaft 16 is rotationally driven by the motor 17. The fixed-side rotary transformer 21 of the rotary transformer 20 is fixed to the upper surface side of the fixed drum 15.

A rotary drum 24 as an upper drum is fixed to the rotary shaft 16 above the fixed drum 15 by press fitting. A rotary side rotary transformer 22 of the rotary transformer 20 is fixed to a boss-like portion below the rotary drum 24. The rotary rotary transformer 22 and the fixed rotary transformer 21 face each other with a predetermined small gap.

A magnetic head 28 is attached to the lower surface side of the rotary drum 24 by attaching screws 29. As shown in FIG. 3, a base substrate 30 is attached to the magnetic head 28, and the base substrate 30 is fixed by the mounting screws 29 via the screw insertion holes 31. On the other hand, on the upper surface side of the rotary rotary transformer 22, a flexible substrate 33 attached to an elastic plate 39 is provided, and a bending portion 33A is formed on this flexible substrate 33, and the flexible substrate 33 is bent based on the elasticity of the elastic plate 39. The pressing force of the curved portion 33A enables the base substrate 30 to be pressed against the base substrate 30 in the arrow direction. As the elastic plate 39, for example, nickel silver or phosphor bronze for spring is used with a thickness of 0.1 mm or more.

FIG. 2 shows an electrical connection method between the magnetic head 28 and the rotary rotary transformer 22. The flexible substrate 33 of FIG. 3 is provided on the upper surface side of the rotary rotary transformer 22, and the bending portion 33A of the flexible substrate 33 is pressed by the base substrate 30 of the magnetic head 28. It is electrically connected by being pressed against the base substrate 30. That is, a pair of conductive patterns 34 and 35 are formed in advance on the flexible substrate 33, and one end of the conductive patterns 34 and 35 is in contact with a pair of electrodes 36 on the base substrate 30 which is electrically connected to the magnetic head 28. Then, the flexible substrate 33 is pressed.

On the other hand, the other ends of the pair of conductive patterns 34 and 35 on the flexible board 33 are electrically connected by being soldered to a pair of electrodes 37 that are electrically connected to the transformer wire 38 of the rotary rotary transformer 22. To be done.

The electrical connection using the flexible substrate 33 and the base substrate 30 is similarly performed for the magnetic heads for other channels provided on the rotary drum 24 at 180 ° apart. However, the illustration is omitted in FIG.

According to this embodiment as described above, the flexible substrate 33 attached to the elastic plate 39 is provided on the rotary rotary transformer 22 which is the lower surface side of the rotary drum 24, and the base substrate 30 is mounted on the magnetic head 28. By providing one end of the flexible substrate 33 to the base substrate 30 of the magnetic head 28 under pressure, and soldering the transformer wire 38 of the rotary rotary transformer 22 to the other end, electrical connection can be established. Therefore, since the electrical connection between the magnetic head 28 and the rotary rotary transformer 22 is performed on the lower surface side of the rotary drum 24, the complexity of the wiring process can be eliminated. In particular, by using the flexible substrate 33 attached to the elastic plate 39 as in the present embodiment, the electrical connection does not require soldering to the magnetic head 28 side, which is a simple operation. You will be able to connect. In addition, since the wiring does not appear on the surface, the appearance does not become unsightly.

[0015]

[Effect of the device]

 As described above, according to the present invention, the flexible substrate attached to the elastic plate is provided on the lower surface side of the rotating drum, and one end of this flexible substrate is pressed against the base plate of the magnetic head and the other end is rotated. Since the transformer head side rotary transformer has a transformer wire that is electrically connected between the magnetic head and the rotary side rotary transformer, the complexity of the wiring process can be eliminated and the appearance is unsightly. Can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a rotary magnetic head device of the present invention.

FIG. 2 is a plan view showing a method of connecting the magnetic head and the rotary rotary transformer in the present embodiment.

FIG. 3 is a perspective view showing an arrangement relationship between a flexible substrate and a base substrate used in this embodiment.

FIG. 4 is a sectional view showing a rotary drum used in a conventional rotary magnetic head device.

FIG. 5 is a plan view showing a rotary drum used in a conventional rotary magnetic head device.

FIG. 6 is a bottom view showing a rotary drum used in a conventional rotary magnetic head device.

FIG. 7 is a circuit diagram showing a connection state between a magnetic head and a rotary transformer.

[Explanation of symbols]

 15 fixed drum 20 rotary transformer 21 fixed side rotary transformer 22 rotary side rotary transformer 24 rotary drum 28 magnetic head 30 base substrate 33 flexible substrate 33A bent portion 34, 35 conductive pattern 38 transformer wire 39 elastic plate

Claims (1)

[Scope of utility model registration request] 1. A rotary magnetic head device comprising a rotary rotary transformer that rotates integrally with a rotary drum, and a fixed rotary transformer fixed to a fixed drum, wherein a magnetic head is attached to the rotary drum. A flexible substrate attached to an elastic plate is provided on the rotary rotary transformer, and one end of this flexible substrate is pressed against the base substrate of the magnetic head, and the transformer wire of the rotary rotary transformer is soldered to the other end for electrical continuity. A rotary magnetic head device characterized in that