JPH06236529A - Magnetic recording and reproducing device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] In the magnetic recording / reproducing apparatus, by automatically cleaning the A / C head every time the cassette is replaced,
/ C Head clogging is prevented and stable recording and reproduction can be performed. [Structure] A tension spring 1 is provided between a cleaning base 13 slidably locked to a second rod 11 and a tip 11 '.
4, a support shaft 16 of a cleaning roller 15 is press-fitted into the cleaning base 13, and a cleaning pad 17 for cleaning magnetic powder and dust is attached to the outer peripheral surface of the cleaning roller 15. In accordance with the rotation of the second rod 11, the cleaning roller 15 is moved in the C direction by the spring 14 while maintaining an appropriate contact pressure on the A / C head 5. At this time, the cleaning pad 17 cleans the magnetic powder, dust and the like adhering to the A / C head 5.

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 such as a video tape recorder.

[0002]

2. Description of the Related Art A conventional VTR will be described with reference to the drawings.

2 (a), 2 (b) and 2 (c) are plan views of a VTR in a conventional embodiment.

FIG. 2A shows the state immediately after the cassette is down. When the sub-loading operation starts from the state of FIG. 2A, the loading cam gear 1 rotates clockwise, and the sub-loading post 3 press-fitted at the tip of the sub-loading arm 2 pulls out the tape 4. The tape 4 is wound around the A / C head 5 and shown in FIG.
It becomes the STOP state. From this state, P2, P3 post 6
The tape 4 is wound around the cylinder 7 by the
The state shown in (c) is entered, and PLAY, REC, etc. are run.

[0005]

However, in the conventional configuration, when magnetic powder, dust or the like is attached to the A / C head, the audio signal cannot be recorded / reproduced, the S / N of the audio output is deteriorated, and the level is lowered. To wake up. Further, there is a possibility that the CTL signal cannot be recorded / reproduced and the servo is ineffective, so that the VTR function cannot be fulfilled.

[0006]

In order to solve the above problems, in the magnetic recording / reproducing apparatus of the present invention, during the sub-loading, the cylindrical member having a magnetic powder removing function is A / C.
By contacting the head with an appropriate contact pressure and sliding on the A / C head while rotating, magnetic powder, dust, and the like on the A / C head are removed.

[0007]

With the above-described structure, the present invention makes it possible to automatically clean the A / C head each time the cassette is replaced, and to always achieve a stable A / C head function.

[0008]

Embodiments of the present invention will be described with reference to FIG. The same components as those described in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1A, the magnetic tape 4 is drawn out by the sub-loading post 3. The first rod 8 is rotatably locked to the sub-loading arm 2 and press-fitted into the chassis 9. The first support shaft 10 is slidable. The second rod 11 is rotatably locked to the tip 8'of the first rod 8,
Like the first rod 8, it is slidable on the second support shaft 12 press-fitted into the chassis 9.

First, the loading cam gear 1 rotates by receiving power from the gear train, and the cam causes the sub-loading arm 2 to rotate in the A direction. In accordance with this rotation, the first rod 8 slides in the B direction while drawing an arc.
The second rod 1 locked to the tip 8 ′ of the first rod 8.
1 rotates about the second support shaft 12 in accordance with the sliding movement of the first rod 8. As shown in FIG. 1C, a tension spring 14 is applied to the other end 11 ′ of the second rod 11 between the cleaning base 13 slidably locked to the second rod 11 and the tip 11 ′. A spindle 16 of a cleaning roller 15 is press-fitted into the cleaning base 13, and a cleaning pad 17 for cleaning magnetic powder and dust is attached to the outer peripheral surface of the cleaning roller 15. In accordance with the rotation of the second rod 11, the cleaning roller 15 is moved in the C direction by the spring 14 while maintaining an appropriate contact pressure on the A / C head 5. At this time, A
/ C The cleaning pad 17 cleans magnetic powder, dust and the like adhering to the head 5.

When the sub-loading is completed, FIG.
As described above, the cleaning roller 15 stands by on the left rear side of the A / C head 5 at a position where it does not interfere with the tape running. Even if PLAY, REC, etc. are operated in this state, the tape running is not affected.

When the cassette is out, the standby state (see FIG. 1)
From (b)), the operation opposite to the above is performed, the A / C head 7 is again contacted, and the cassette comes out while cleaning.

[0013]

As is apparent from the above description of the embodiments, when the structure of the present invention is used, the A / C head is cleaned every time the cassette is in and the cassette is out. Is a recording / playback error or C
Eliminates disturbance of servo due to recording / playback error of TL signal,
By ensuring stable recording / reproducing of the A / C head, a highly reliable mechanism is provided.

[Brief description of drawings]

FIG. 1A is a plan view of a cassette down state according to an embodiment of the present invention. FIG. 1B is a plan view of a sub-loading completion according to an embodiment of the present invention.

FIG. 2A is a plan view of a conventional embodiment in a cassette down state. FIG. 2B is a plan view of a conventional embodiment in which sub-loading is completed. FIG. 2C is a plan view of a conventional embodiment in a PLAY state.

[Explanation of symbols]

 1 Loading Cam Gear 2 Sub-loading Arm 3 Sub-loading Post 4 Tape 5 A / C Head 6 P2, P3 Post 7 Cylinder 8 First Rod 8'First Rod Tip 9 Chassis 10 First Spindle 11 Second Rod 11 'Second 2 Other end of rod 12 Second support shaft 13 Cleaning base 14 Tension spring 15 Cleaning roller 16 Cleaning roller support shaft 17 Cleaning pad

Claims (1)

[Claims] 1. A rotary magnetic head having a fixed magnetic head for recording and reproducing a control signal and an audio signal, a gear with a cam which rotates by receiving power transmitted from a gear train, and a shaft which is rotated by the cam and pulls out a magnetic tape. A movable member, a first member rotatably locked to the rotating member, and slidably locked to a support shaft 1 press-fitted to a base, and freely rotatable to the tip of the first member. A second member that is locked to the support shaft 2 and that is slidably locked to the support shaft 2 that is press-fitted to the base, a cylindrical member that is rotatable and has an outer peripheral surface having a magnetic powder removing function, and the cylindrical member. And a supporting shaft slidably locked to the second member, the cylindrical member sliding while pressing the magnetic head with an appropriate contact pressure by a spring. Magnetic recording / reproducing device characterized by.