JPH0489611A - Magnetic head device - Google Patents

Abstract

PURPOSE:To prevent position deviation with the environmental temperature change of a magnetic head by forming a space between a position adjusting base in the tape travelling direction of a fixed magnetic head and a position adjusting base perpendicular in the tape travelling direction and fixing those bases. CONSTITUTION:A magnetic head 1 is fixed to a fixed base 2 by screws or adhesion, and the fixed base 2 is fixed to a position adjusting base 6 in the tape travelling direction by screws 3 and 4. Further, this position adjusting base 6 is fixed to a position adjusting base 5 perpendicular in the tape travelling direction by screws 7 and 8. In this case, a spacer 9 is inserted to the stopper parts of the screws 7 and 8 so as to form a space between the position adjusting bases 5 and 6. Thus, mutual influence caused by shrinkage and expansion caused by the environmental temperature of the position adjusting bases 5 and 6 or distortion in fitting can be prevented by forming the space, and the fitting position deviation of the magnetic head can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for recording and reproducing signals by winding a magnetic tape at a predetermined angle around a tape running system including a magnetic head fixed by a drawing means. The attachment of the fixed magnetic head is related to the structure.

Conventional technologyIn the case of a magnetic recording and reproducing device including a fixed magnetic head,
For example, the phase difference of audio signals during recording and playback, etc.
The mounting of the magnetic head described above depends on the structure and is greatly influenced by the temperature environment.

The mounting structure of the conventional fixed magnetic head as described above will be explained below with reference to FIG.

In FIG. 3, 21 is a magnetic head, 22 is an audio signal phase difference adjustment hysteresis, 23 is a tilt adjustment screw for the magnetic head, 24 is a position adjustment base for the magnetic head in the tape running direction, and 25 is a tape running head for the magnetic head. The height position adjustment base 26 in the direction perpendicular to the direction is a fixing screw for fixing the position adjustment base 24 to the height position adjustment base 25. The structure of mounting such a magnetic head is such that there is no space between the position adjustment base 24 and the height position adjustment base 25, so that the bases 24 and 25 may contract or expand due to temperature changes due to changes in the environmental temperature. This applies stress to the magnetic head, causing a phenomenon in which the position of the magnetic head shifts.

Problems to be Solved by the Invention In the conventional magnetic head mounting structure, there is no space between the position adjustment base 14 and the height adjustment base 15 as described above, so changes in the environmental temperature may occur. Since the effects of contraction and expansion are mutually large, a phenomenon occurs in which the position of the magnetic head shifts. As a result, performance problems such as a phase shift in the audio signal and a reduction in the output level have occurred, especially in the high frequency range.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide a mounting structure that prevents the magnetic head from shifting in position due to changes in the environmental temperature.

Means for Solving the Problems In order to achieve the above object, the present invention provides a method for mounting a magnetic head such that a space is formed between a position adjustment base in the tape running direction and a position adjustment base perpendicular to the tape running direction. has a structure.

Effect of the Invention The present invention has the above-described configuration, and by eliminating the effects of contraction and expansion between the magnetic head position adjustment bases due to changes in environmental temperature, it is possible to prevent the positional deviation of the magnetic head, and to prevent audio signal phase deviation, output level reduction, etc. It is possible to solve the performance problems of

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the magnetic head 1 is fixed to a fixed base 2 by screws and adhesive.
As shown in the cross-sectional view at the screw part (Fig. 1(b)), the installation is performed when viewed from the direction of arrow A in Fig. 1(a). Furthermore, this positioning base 6 is fixed by screws 7.8 to the positioning base 5 perpendicular to the tape running direction.

In the above configuration, the spacer 9 is inserted into the stop portion of the helix 7.8 in order to create a space between the position adjustment bases 5 and 6. According to the present invention, such a spacer 9 prevents the mutual influence of contraction and expansion of the position adjustment bases 5 and 6 due to environmental temperature, as well as distortion during installation, by forming a space, and prevents the magnetic head from moving. Installation prevents misalignment.

In addition, as another embodiment of the present invention, as shown in FIG.
The position adjustment base 6 is attached to the position adjustment base 5 perpendicular to the tape running direction by providing a guide pin 10.
The position adjustment bases 5 and 6 are attached with one side fixed and the other side free. Furthermore, here,
It can be fixed using either screw 7 or screw 8.

Note that the material of the spacer in this embodiment is not particularly limited, such as resin or metal, and may be any material that fulfills the function of the spacer.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, a space is formed between the position adjustment base of the magnetic head in the tape running direction and the position adjustment base perpendicular to the tape running direction. By adopting such a mounting structure, the mutual effects of contraction and expansion due to environmental temperature changes, and the distortion caused by time, can be prevented by forming a space.

This prevents the magnetic head from being misaligned when attached, and solves performance problems such as audio signal phase shift and output level drop.

[Brief explanation of the drawing]

FIG. 1(a) is a plan view of the mounting structure of a magnetic head according to an embodiment of the present invention, FIG. 1(b) is a cross-sectional view of FIG. 1(a) when viewed from direction A, and FIG. (a) is a plan view of another embodiment of the present invention, FIG. 2(b) is a sectional view of FIG. 2(a) viewed from direction A, and FIG. 3(a) is a conventional magnetic head mounting. 3(b) is a plan view of the structure, and FIG. 3(b) is a sectional view of FIG. 3(a) viewed from six directions. 1...Magnetic head, 2...Fixed base, 3, 4...Fixed base and position adjustment base are installed with screws, 5...Tape running Position adjustment base perpendicular to the direction, 6...Position adjustment base in the tape running direction, 7, 8...Position adjustment base 5, 6
For installation, use screws, 9...spacer, 10...
...Mounting with pin, 11...Mounting with position guide pin. Name of agent: Patent attorney Shigetaka Awano and 1 other person Law C shares

Claims (1)

[Claims] The tape recording medium housed in the loaded cassette is pulled out from the cassette by a tape pull-out means, and is wound around the outer periphery of a guide drum equipped with a rotary head and a magnetic head fixed at a predetermined angle to generate a signal. In a recording and reproducing apparatus configured to perform recording or reproduction, the fixed magnetic head is mounted so as to form a space between a position adjustment base in the tape running direction and a position adjustment base perpendicular to the tape running direction. A magnetic head device comprising: