JPS6390021A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate recording and reproducing adjustment by fitting a small plate to a pin planted on a base movably in the vertical direction through a compression spring and bringing an arm of a head base unit into contact with a screw fitted to the small plate. CONSTITUTION:The small plate 12 is fitted to the pin 11 planted on the base 3 movably in the vertical direction through the compression twisted spring 13 and the arm 8a of the head base unit 8 is abutted upon the screw 5 fitted to the small plate 5. In addition, a shaft 6, a nut 10 and a compression spring 14 are fitted to adjust the height of the small plate 12 and the unit 8. When the nut 10 is loosened under said constitution, the base unit 8 is moved upward and the height of the unit 8 from the tape 1 is increased, and at the time of tightening the nut 10, the nut 10, the unit 8 is lowered. Even if the height of the unit 8 is changed, the positions of the screw 5 and the arm 8a are not changed and recording and reproducing adjustment can be extremely easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and particularly to an adjustment mechanism for recording/reproducing.

[Conventional technology]

4 to 7 show the adjustment mechanism of a conventional device of this type. FIG. 4 is a plan view of the magnetic recording/reproducing device, FIG. 5 is a view taken in the direction of arrow A in FIG. 4, and FIG. Similarly, FIG. 7, which is a view in the direction of arrow B, is a partially detailed view. In the figure, 1 is a magnetic tape, 2 is a rotary head assembly for recording or reproducing video signals on the tape l, 3 is a pace that supports the rotary head assembly 2, and 4 is 6 times for winding the magnetic tape 1 around the head assembly 2. The roller 5 is a screw screwed into the pace 3 and movable up and down, and has a tape 4-shaped head 5a. Reference numeral 6 indicates a shaft erected on the pace 3 and has a screw 6a formed at the tip; 7 a head unit for recording or reproducing audio and control signals on the magnetic tape 1; 8 a shaft 6;
A head base unit 9 is slidably engaged with the pace unit 8 and rotates about the shaft 6 as a fulcrum, and 9 presses the arm 8a of the pace unit 8 against the head 5a of the screw 50, and connects the head base unit 8 and the pace 3, respectively. A compression torsion spring 10 engages the pusher 3a of the pace 3 biased in the opposite direction and the claw portion 8b of the head base unit 8, and a compression torsion spring 10 fixes the head base unit 8 biased by this torsion spring 9. It is a nut that moves the top and bottom in the vertical direction.

Next, the operation will be explained. In Fig. 5, when the screw 5 is loosened, the head 5 moves upward as shown in Fig. 7.
The positions of arm 8a and head base unit 8a change.
rotates in the direction of arrow a using the shaft 6tl as a fulcrum.

As a result, the ψ head unit 7 fixed to the Shiherad pace unit 8 is rotated, and the rotary head assembly 2 moves the video signal to the position recorded on the magnetic tape l, and the head unit 7 moves the audio and control signals to the magnetic tape. The distance to the position recorded in l can be shortened. Conversely, when the screw 5 is tightened, the above distance becomes longer. Further, when the nut to' is loosened, the head base unit 8 is pushed up by the compression torsion spring 9 and moves in the direction of arrow C, so that the head unit 7 becomes higher with respect to the magnetic tape 1.

Conversely, when the nut 10 is tightened, the head unit 7 is lowered.

[Problem that the invention seeks to solve]

Since the adjustment mechanism of the conventional magnetic recording/reproducing device is configured as described above, even if the height of the head base unit 8 changes, the positions of the screw 5 and the arm 8a change, and the position of the video signal recording and the audio and control signals are adjusted. Since the recording position and distance change, it is necessary to perform the adjustment using the nut 10 first. For example, if the adjustment is performed using the nut 10 after the adjustment using the screw 5, the adjustment using the screw 5 must be performed again, and therefore the adjustment is troublesome. It required

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a magnetic recording/reproducing device equipped with an adjustment mechanism that allows easy adjustment.

[Failure to solve the problem]

In the magnetic recording and reproducing device according to the present invention, a small plate is vertically movably engaged with a pin set up on the pace, a screw is attached to the small plate, and an arm of a head base unit is brought into contact with the screw. A compression spring is provided between the head base unit and the small plate, and a compression spring is provided that biases the pace, the small plate and the head base unit in opposite directions, and presses the small plate against the pin. A nut is screwed onto the tip of the shaft that allows the height of the unit to be adjusted.

[Effect]

In the magnetic recording and reproducing apparatus according to the present invention, when the nut is loosened, the small plate and the head base unit are moved upward by the compression spring, and the position of the head unit relative to the magnetic tape is raised. Also, when the nut is tightened, the small plate and the head base unit move downward, lowering the position of the head unit. Therefore, the head base unit does not rotate about the shaft as a fulcrum.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a plan view of the magnetic recording and reproducing apparatus, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. 3 is a view taken in the direction of arrow B in FIG. This is the same as the conventional device shown in . 11 is a pin erected on the pace 3; 12 is a small plate inserted through the shaft 6 and the pin 11 so as to be slidable up and down; the screw 5 is attached to this small plate 12.

12a is a rack attached to the small plate 12 and interposed between it and the head base unit 8. 13 is a compression spring inserted into the shaft 6, supported at one end by the small plate 12 and the other end by the pin 11, and urges the small plate 12ffi to be pressed against the pin 11. ■ 4 is a compression torsion spring inserted into the shaft 6, one end of which is supported by the small plate 12, and the other end of which is supported by the U-shaped part 8c of 8, and the arm 8a of the head base unit 8 is supported. Head 5 of screw 5
It is pressed against a.

In the adjustment mechanism configured as described above, when the nail 10 is loosened, the small plate 12 and the head base unit 8 are moved upward in the direction of arrow C by the compression spring 13, so that the small plate 12 and the head base unit 8 are moved upwardly in the direction of the arrow C. position becomes higher. Conversely, when the cut io is tightened, the small plate 12 and the head base unit 8 move downward, lowering the position of the head unit 7.

However, the positions of the screw 5 and the arm 8a of the head base unit 8 do not change. As a result, the head base unit 8 does not rotate around the shaft 6 as a fulcrum, and therefore the distance between the recording position of the video signal and the recording position of the audio and control signals remains unchanged. Note that this distance changing operation is the same as the method described for the conventional example.

〔Effect of the invention〕

As explained above, according to the present invention, the small plate is vertically movably engaged with the bin set up on the pace, the screws are attached to the small plate, and the screws are brought into contact with all the screws of the arm of the head base unit. By providing a compression spring that biases the pace, small plate, and head base unit in opposite directions, and presses the small plate against the bottle, the screw remains stable even if the height of the head base unit changes. This prevents the position of the arm of the head base unit from changing, making it easier to adjust recording and playback.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a portion of a magnetic recording/reproducing apparatus equipped with an adjustment mechanism according to an embodiment of the present invention, and FIG.
3 is a view in the direction of arrow B, FIG. 4 is a plan view of a portion of a conventional magnetic recording/reproducing device, FIG. 5 is a view in the direction of arrow A in FIG. 4, and FIG. The perspective view, FIG. 7, is a diagram of the operation of the screw. 1...Magnetic tape, 2...Rotating RAD assembly,
3... Pace, 4... Roller, 5... Screw, 6... Shaft, 7... Head unit, 8
...Head base unit, 1o...Natsuto, 11
...Bin, 12...Small plate, 13...Compression spring, 1
4... Compression tension spring. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A rotary head assembly for recording or reproducing video signals on a magnetic tape, a base for supporting the head assembly, a roller for winding the magnetic tape around the rotary head assembly, a shaft erected on the base and having a threaded tip; a pin, a small plate vertically and slidably engaged with the shaft and the pin, a screw having a tapered head attached to the small plate, and an A/R for recording or reproducing audio and control signals on the magnetic tape. C
a head unit, a head base unit that supports this head unit and engages with the shaft so that it can rotate and slide up and down, an arm that is attached to this head base unit and comes into contact with the head of the screw, and the arm is connected to the screw. A compression torsion spring that engages between the head base unit and the small plate so as to bring them into contact, and a compression torsion spring that uses the shaft as a support rod to urge the base, the small plate, and the head base unit in opposite directions, and pin the small plate. 1. A magnetic recording and reproducing device characterized by comprising a compression spring that presses the small plate and a head base unit, and a shaft tip and a screwed nut that make it possible to adjust the height of the small plate and the head base unit.