JPH0719414B2 - Magnetic recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus which can be used in a video tape recorder or the like.

[0002]

2. Description of the Related Art In recent years, in the field of magnetic recording / reproducing devices, particularly in the field of portable devices, as the size and weight have been reduced, it has been required to make the mechanism compact.

A conventional magnetic recording / reproducing apparatus will be described below with reference to the drawings. FIG. 7 is a schematic configuration diagram showing a tape running system of a conventional rotary head type magnetic recording / reproducing apparatus.

As shown in FIG. 7, the magnetic tape 102 from the supply reel accommodated in the cassette 119 is guided by the guide posts 103, 10 embedded in the cassette 119.
4, the tension post 105, the erasing head 106, the guide roller 107, the guide posts 108 and 109, and the guide posts 110 and 111 wound around the rotary head drum 120, the rotary roller 112 fixed to the chassis, and the voice head. After passing through 113, the guide post 114, the pinch roller 115, and the capstan 116, it enters into the cassette 119, passes through the guide post 117 planted in the cassette 119, and is taken up by the take-up reel 118.

The alternate long and short dash lines 120 and 121 are guide posts 108 and 109 and guide posts 110 and 1, respectively.
11 is a drawing of the movement trajectory when the tape is pulled out,
Before the tape is pulled out, the guide posts 108 and 109 and the guide posts 110 and 111 are respectively 108a and 1 in the figure.
09a, 110a, 111a.

[0006]

Therefore, during tape loading, the guide posts 108, 100, 11 are provided.
Since the 0 and 111 move, the rotating roller 112 fixed to the chassis is moved to the guide posts 100, 108 and 11
It had to be arranged so as not to be located on the movement loci 120 and 121 of 0 and 111. Therefore, there is a problem that it is difficult to reduce the size of the conventional device.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a magnetic recording / reproducing apparatus capable of reducing the size and weight of the apparatus.

[0008]

In order to solve the above-mentioned problems, the present invention utilizes a tape loading operation,
Moves the rotating roller, which is arranged so that it is not located on the guide post movement path during the tape loading operation of the guide post, to the position where it abuts the magnetic tape or the rotary head drum at the time of or just before the end of the tape loading operation of the guide post. It is configured to do.

[0009]

With this structure, the rotating roller can be moved so as to contact the magnetic tape or the rotating head drum located at a position close to the movement locus of the guide post, so that the size and weight of the apparatus can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic configuration diagram showing a tape running system of a rotary head type magnetic recording / reproducing apparatus according to an embodiment of the present invention,
2 is a partial perspective view of a rotary roller portion of the apparatus, FIGS. 3 and 4 are operation explanatory views of the same portion, and FIGS. 5 and 6 are perspective views of relevant portions.

In the figure, reference numeral 1 is a cassette, and inside the cassette 1, a supply reel, a tape 3, a guide roller 4, guide rollers 21, 22 and a take-up reel 23 are arranged. The tape 3 is pulled out from the supply reel 2, passes through the guide roller 4, the tension post 5, the guide roller 6, the erasing head 7 fixed to the chassis, the guide post 8 and the guide post 9, and is wound around the rotary head drum 10. Further, through the guide posts 11 and 12, the rotary roller 13 fixedly supported by the arm 14 rotatably supported by the chassis, the voice head 16, the guide post 18, the pinch roller 19, and the capstan 20, the cassette 1 is again provided. Then, it is wound on the take-up reel 23 via the guide posts 21 and 22.

24 and 25 are guide posts 8 and 8, respectively.
9, the guide posts 11 and 12 show the trajectory of the tape pull-out operation, and before the tape pull-out, 8c and 9 shown in FIG.
It is held at the positions indicated by c, 11c, and 12c.

Here, the rotating roller 13 is configured to perform the same one-to-one movement as the arm 14.

The voice head 16 and the dubbing erase head 17 are arranged on a head base 15, and the head base 15 is attached to the arm 14 by three screws. The arm 14 having the boss portion is supported by the chassis so as to be rotatable around a rotation fulcrum 14a. Arm 1
The boss portion 4 has a spring hook portion 14b, and the tension spring 26 fixed at one end causes the arm 14 to move to the rotation fulcrum 1
4a is urged in the direction of the arrow 30 and the fixing pin 27
Is locked in place by.

The loading base shown in FIG. 2 has a groove 32 for realizing the loading locus 25 shown in FIG. 1, and the guide posts 11 and 12 have this groove 32.
Is used as a guide to perform the tape loading operation.

Reference numeral 36 denotes a drive gear meshing with the plate-shaped loading 35, and a pin 37b of a drive lever 37 is engaged with a cam groove shown in FIG. A pin 37 a is planted at the tip of the drive lever 37. The pin 37a engages with the lever (A) 38. The lever (A) 38 is rotatably supported by the pin 37a, and is rotatably connected to the lever (C) 39 and the lever (B) 40 by the pin 38a. One end 39a of the lever (C) 39 is rotatably connected to the lever (D) 41, and the lever (D) 41 is rotatably supported by a pin whose one end 41a is fixed to the loading base 31. At the other end, one end is pulled by a tension spring 45 fixed to a pin 46 on the loading base 31, and the bent portion of the lever (D) 41 is in contact with the loading base 31.

The lever (B) 40 is rotatably connected to the lever (E) 42, and one end of the lever (E) 42 is in contact with the downward convex portion 43 of the arm 14. The hole 44 serves both as an escape hole for the convex portion 43 and a hole for determining the fixing position.

Next, the operation of this device will be described. First, when the loading ring 35 rotates clockwise as shown in FIG. 3 to load the tape 3, the drive gear 36 meshing with the loading ring 35 rotates counterclockwise. The drive lever 37 rotates counterclockwise according to the movement of the groove of the drive gear 36. As a result, the lever (A) 38, the lever (B) 40, and the lever (C) 39 start to move, but since the lever (D) 41 is pulled by the strong tension spring 45, the lever (C) 39 is initially fulcrum 39a. Rotate around. Then, the lever (B) 40 rotates counterclockwise of the lever (E) 42, and the arm 14 integrated with the convex portion 43 starts rotating clockwise.

Then, when the arm 14 is moved to the position where the convex portion 43 and the escape hole 44 come into contact with each other, the lever (C) 39 is rotated by the rotation of the drive lever 37 as shown in FIG.
Moves lever (D) 41. This allows the tension spring 45
Elasticity acts to rotate the arm 14 and fix it at a predetermined position.

As described above, by utilizing the tape loading operation, the rotating roller arranged so as not to be located on the movement locus of the guide post during the tape loading operation of the guide post ends the tape loading operation of the guide post. It is possible to move to the position where it abuts the magnetic tape at the time or immediately before the end. Further, since the driving force acting on the loading mechanism is also used for moving the arm on which the rotating roller is placed, the arm can be easily moved and positioned reliably.

The rotary roller 13 described in this embodiment may be a tape running guide post with a brim, though not shown in the drawings.

Further, although it has been described that the rotary motor 13 moves to the position where it abuts on the magnetic tape at the time of or just before the end of the tape loading operation of the guide post, it may come into contact with the rotary head drum.

Further, the rotary roller may be made of metal, resin, or a relatively hard material, or sponge, felt, or a soft material.

[0025]

From the above description, when the tape loading operation of the guide post is performed by using the tape loading operation, the rotary roller arranged so as not to be located on the movement locus of the guide post ends the tape loading operation of the guide post. By moving to the position where it abuts the magnetic tape or the rotary head drum at the time or immediately before the end,
The size and weight of the device can be greatly reduced.

Further, the rotating roller has a tape guide function for regulating the tape running, and by making the roller relatively large in diameter and having a large mass, it absorbs the vibration of the tape as an impedance roller and has a high image quality with little jitter. It is possible to play various functions such as a tape cleaning mechanism and a rotary head cleaning function by using a sponge or felt made of a soft material. Can be contributed to.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of an essential part of the embodiment.

FIG. 3 is an operation explanatory diagram of the embodiment.

FIG. 4 is an operation explanatory diagram of the embodiment.

FIG. 5 is a partial perspective view of the same embodiment.

FIG. 6 is a partial perspective view of the same embodiment.

FIG. 7 is a schematic configuration diagram of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 3 Magnetic Tape 10 Rotating Head Drum 11 Guide Post 12 Guide Post 13 Rotating Roller 37 Drive Lever 38 Lever A 39 Lever C 40 Lever B 41 Lever D 42 Lever E

Claims (1)

[Claims] 1. A rotary head drum, a tape loading mechanism for winding a magnetic tape around the rotary head drum, a guide post moved by the loading mechanism, a rotary roller abutting on the rotary head drum, and a tape. A second position in which the rotating roller is held at a first position which is not located on the movement trajectory of the guide post before loading, and the rotating rotor is brought into contact with the rotating head drum at the time of or immediately before the end of tape loading. And a rotating roller moving means for moving the magnetic recording and reproducing apparatus.