JPH0727604B2 - Magnetic recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus such as a video tape recorder for recording / reproducing signals using a rotary head cylinder.

2. Description of the Related Art In recent years, magnetic recording / reproducing devices are becoming multi-headed. Hereinafter, an example of the above-described conventional magnetic recording / reproducing apparatus will be described with reference to the drawings.

FIG. 3 is a side view showing a rotary head cylinder portion of a conventional magnetic recording / reproducing apparatus.

In FIG. 3, reference numeral 10 denotes a substrate, and main components such as a cassette and a reel stand (not shown) are held and fixed on the upper surface 12. The substrate 10 has an inclined table 14, and the rotary head cylinder mounting surface 16 of the inclined table 14 and the upper surface 12 of the substrate 10 are machined to form a predetermined inclination angle A. A rotary head cylinder 20 having a rotary side rotary transformer 18 of a pair of rotary transformers for contactlessly transmitting an electric signal from a magnetic head (not shown) is fixed to the rotary head cylinder mounting surface 16. There is. On the upper surface 12 of the substrate 10, columns 24 supporting the fixed rotary transformer 22 of the pair of rotary transformers are fixed by screws 26.

The support column 24 is configured such that the fixed surface 28 of the fixed-side rotary transformer 22 and the fixed surface 30 to the substrate 10 are equal to a predetermined angle B, that is, the inclination angle A, and the dimensions are the same as the substrate 10.
The fixed-side rotary transformer 22 and the rotary-side rotary transformer 18 of the pair of rotary transformers are dimensioned so that a predetermined gap T can be obtained when they are fixed to each other.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, as shown in FIG. 3, the inclination angle A between the upper surface 12 of the substrate 10 and the rotary head cylinder mounting surface 16 of the tilt base 14 and the size thereof, and the column 24. The error between the fixed surface 28 of the fixed rotary transformer 22 and the fixed surface 30 on the substrate 10 such as the angle B and the dimension is accumulated, so that the fixed rotary transformer 22 and the rotary rotary transformer 18 of the pair of rotary transformers are separated from each other. Not only the gap T cannot be maintained at a predetermined size, but also surface runout occurs on the facing surfaces of the fixed rotary transformer 22 and the rotary rotary transformer 18.

Further, when the pillar 24 is fixed to the substrate 10, if it is biased in the arrow C direction, the gap T is narrowed, if it is biased in the arrow D direction, the gap T is widened, and if it is twisted and fixed in the arrow E direction. Surface runout occurs in the fixed-side rotary transformer 22.

Furthermore, the fixed surface 28 of the rotary transformer 22 on the fixed side of the column 24
Since the fixing surface 30 to the substrate 10 and the substrate 10 form an angle, it is extremely difficult to control the dimensions.

In view of the above problems, the present invention provides a magnetic recording / reproducing apparatus in which a gap T between a fixed rotary transformer and a rotary rotary transformer of a pair of rotary transformers is extremely stable.

Means for Solving the Problems In order to solve the above problems, a magnetic recording / reproducing apparatus of the present invention includes a rotary head cylinder having a rotary side rotary transformer for transmitting an electric signal to an upper end of a rotary cylinder, A base having an inclination for fixing the rotary head cylinder and having a mounting surface parallel to the fixed surface of the rotary head cylinder; and a fixed-side rotary transformer fixed to the mounting surface. And a support member that is fixed to the mounting surface of the base so that the rotary side rotary transformer of the rotary head cylinder and the fixed side rotary transformer of the support member face each other in a predetermined relationship. Is.

The present invention suppresses the surface runout on the facing surfaces of the fixed-side rotary transformer and the rotary-side rotary transformer by the above-described structure, and maintains the predetermined gap formed between the fixed-side rotary transformer and the rotary-side rotary transformer. A recording / reproducing device can be provided.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a rotary head cylinder portion of a magnetic recording / reproducing apparatus according to a first embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a substrate, and main components such as a cassette and a reel stand (not shown) are held and fixed on the upper surface 12. The substrate 10 has an inclined table 14, and the rotary head cylinder mounting surface 16 of the inclined table 14 and the upper surface 12 of the substrate 10 are machined to form a predetermined inclination angle A. A rotary head cylinder 20 having a rotary side rotary transformer 18 of a pair of rotary transformers for non-contact transmission of an electric signal from a magnetic head (not shown) is fixed to the rotary head cylinder mounting surface 16. There is. The upper surface 12 of the substrate 10 is provided with a support base 52 having the same surface 50 that is machined at the same time as the rotary head cylinder mounting surface 16 of the tilt base 14, and the support base 52 includes a pair of rotary transformers. The support column 54 supporting the fixed-side rotary transformer 22 is fixed by screws 26.

The column 54 is configured such that the fixed surface 28 of the fixed-side rotary transformer 22 and the fixed surface 56 to the support base 52 are parallel to each other with a step F, and the size of the pair of rotary transformers when fixed to the substrate 10. The fixed side rotary transformer 22 and the rotary side rotary transformer 18 are dimensioned so that a predetermined gap T can be obtained.

In the above-mentioned configuration, when the support column 54 is fixed to the support base 52, even if the columns 54 are biased in the directions of arrows C, D, or E and are fixed by being twisted, the fixed side rotary transformer 22 and the rotary side of the pair of rotary transformers are fixed. The predetermined gap T with the rotary transformer 18 is not affected at all.

In addition, the mounting surface 50 of the support 54 of the support base 52 is the tilt base 14.
Since the rotary head cylinder mounting surface 16 is processed at the same time, the inclination angle A can be maintained accurately. Further, since the fixed side 28 of the fixed side rotary transformer 22 of the support column 54 and the fixed surface 56 to the support base 52 are parallel surfaces having a step F, not only is it easy to process, but also the dimensional accuracy of the step F is easily obtained.

Next, a second embodiment of the present invention will be described. FIG. 2 is a side view showing the rotary head cylinder portion of the magnetic recording / reproducing apparatus of the second embodiment of the present invention.

In FIG. 2, reference numeral 10 denotes a substrate, and main components such as a cassette and a reel stand (not shown) are held and fixed on the upper surface 12. The substrate 10 has an inclined table 14, and the rotary head cylinder mounting surface 16 of the inclined table 14 and the upper surface 12 of the substrate 10 are machined to form a predetermined inclination angle A. A rotary head cylinder 20 having a rotary side rotary transformer 18 of a pair of rotary transformers for contactlessly transmitting an electric signal from a magnetic head (not shown) is fixed to the rotary head cylinder mounting surface 16. There is. The upper surface 12 of the substrate 10 is provided with a support base 62 that is processed to have a parallel surface 60 with a step F and the rotary head cylinder mounting surface 16 of the tilt base 14. The columns 64 supporting the fixed rotary transformer 22 of the pair of rotary transformers are fixed by screws 26.

The column 64 has the fixed surface 28 of the fixed rotary transformer 22 and the fixed surface 66 to the support base 62 that are on the same plane, and the dimensions of the fixed side rotary transformer of the pair of rotary transformers when fixed to the substrate 10. 22 and the rotary rotary transformer 18 are dimensioned so that a predetermined gap T can be obtained.

With the above configuration, when the front air column 64 is fixed to the support base 62, even if the front air column 64 is biased or twisted in the directions of arrows C, D, and E, the pair of rotary transformers and the fixed-side rotary transformer 22 rotate. The predetermined gap T with the side rotary transformer 18 is not affected at all.

In addition, the mounting surface 60 of the support 64 of the support base 62 is the tilt base 14.
Since it is a parallel surface having the step F and the rotary head cylinder mounting surface 16, the inclination angle A is not only accurately maintained, but also the dimensional accuracy of the step F is easily obtained. Further, since the fixed surface 28 of the fixed side rotary transformer 22 of the support column 64 and the fixed surface 66 of the support base 62 are on the same plane, they can be easily machined and their dimensions can be maintained accurately.

As described above, according to the present invention, by forming the rotary head cylinder mounting surface of the substrate and the mounting surface of the supporting column for supporting the rotary transformer in parallel, it is possible to simplify the processing of the supporting column and to obtain highly accurate dimensions. In addition to being obtained, it has an excellent effect that the gap of the rotary transformer is not affected even if misalignment occurs when fixing the pillar to the substrate.

[Brief description of drawings]

FIG. 1 is a side view showing a rotary head cylinder portion of a first embodiment of the present invention, FIG. 2 is a side view showing a rotary head cylinder portion of another embodiment of the present invention, and FIG. It is a side view which shows a head cylinder part. 10 …… Substrate, 14 …… Inclination base, 18 …… Rotary side rotary transformer, 20 …… Rotating head cylinder, 22 …… Fixed side rotary transformer, 52 …… Supporting base, 54 …… Post, 62 ……
Support base, 64 ... Support post.

Claims (1)

[Claims] 1. A rotary head cylinder having a rotary rotary transformer for transmitting an electric signal to an upper end of the rotary cylinder, and a rotary head cylinder provided on a substrate for fixing the rotary head cylinder and having a predetermined inclination. 1 mounting surface, a 2nd mounting surface formed in parallel with said 1st mounting surface, and a supporting member fixed to said 2nd mounting surface and provided with a fixed side rotary transformer, When the head cylinder is fixed to the first mounting surface and the support member is fixed to the second mounting surface, respectively, the rotary side rotary transformer of the rotary head cylinder and the fixed side rotary transformer of the supporting member have a predetermined shape. A magnetic recording / reproducing apparatus characterized in that they are opposed to each other while maintaining a relationship.