JPH04178911A - Rotary head device with head cleaning mechanism - Google Patents

Abstract

PURPOSE:To enable increase in volume to be reduced even if a cleaning mechanism is mounted to a rotary head device since a supporting member of the cleaning mechanism is not required by mounting the cleaning mechanism to a supporting member which supports a stator of a motor. CONSTITUTION:An opening is formed in a central part of a supporting member 30 and a head cleaning mechanism is provided at this opening. Namely, a roller 31 for removing substances adhering to head, a roller arm 32 which supports this roller 31 so that it can be rotated, and further an arm holder 33 which supports the roller arm 32 so that it can be rocked are placed at an opening of the supporting member 30, thus achieving a compact device even if a head cleaning mechanism is provided at a rotary head device which incorporates a motor 13 at a rotary drum 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary head device equipped with a rotating mechanism, and particularly to a small rotary head device used in a camera-integrated video tape recorder and the like.

[Conventional technology]

Rotary head devices used in video tape recorders and the like perform recording and reproduction by contacting a thin magnetic tape at high speed, so magnetic powder from the magnetic tape adheres to the surface of the head and adversely affects signal transmission during recording and reproduction. There is.

For this reason, as described in Japanese Patent Laid-Open No. 62-22222, a method has been proposed in which a cleaning roller is provided to remove the magnetic powder adhering to the head.

On the other hand, as a structure for downsizing the rotary head device, there is a method of arranging the motor inside the rotary drum. A rotary head device having this structure will be explained with reference to the drawings.

FIG. 7 is a sectional view of a rotary head device in which a motor is built into a rotary drum. In FIG. 7, magnetic heads 1 and 2
are fixed to the lower part of the rotating drum 3 with screws 4, respectively. The rotating drum 3 has a hole formed in the center and is fixed concentrically to the disk 6 with screws 7.

Further, a shaft 8 is shrink-fitted to the center of the disk 6. This shaft 8 is fitted with a ball bearing 9, and an extra pressure fitting 11 is attached to the lower end of the shaft 8 with a screw 2.
It is stopped at 2. The ball bearings 9 are press-fitted into the upper and lower portions of a bearing housing integrally formed at the center of the fixed drum 10, respectively.

A motor 13 for rotating the rotary drum 3 is built in the rotary drum 3. That is, the magnet 14 of the motor 13 is adhesively fixed to the rotor yoke 15 and fixed to the upper surface of the rotating drum 3 with screws 19, and the stator coil 16 is fixed to the fixed arm 18 screwed to the fixed drum 10 with screws 25. The magnet 14 is attached at a predetermined distance from the magnet 14.

Further, a back yoke 17 is attached to the disk 6 at a predetermined interval on the upper surface of the stator coil 16, and constitutes the motor 13.

A rotary transformer 12 is adhesively fixed to the upper surface of the bottom of the fixed drum 10 and the disk 6, respectively, and connects an external circuit (not shown) and rotating magnetic heads 1 and 2.
arranged to transmit signals between the

FIG. 8 is a top view showing a part of a recording/reproducing apparatus using this rotary head device, and shows a state in which a magnetic tape 28 is loaded.

Said support member is thus arranged between tape guides 26,27.

[Problem to be solved by the invention]

However, in such a rotary head device having a structure in which a motor is built into the rotary drum, sufficient consideration has not been given to a head cleaning mechanism. That is, since the support member that fixes the stator of the motor is placed on the side of the rotary head device, there is no place to place the cleaning mechanism when the tape is loaded as shown in FIG. In order to clean the head in the previous state, it was necessary to increase the amount of movement of the cleaning roller so as not to interfere with the tape guide, which caused the problem that the entire mechanism became large. It is an object of the present invention to provide a rotary head device having a structure in which a motor is built into a rotary drum, which is small in size and has a cleaning mechanism.

[Means to solve the problem]

In order to achieve the above object, the present invention has a structure in which a cleaning mechanism is attached to a support member that supports a stator of a motor.

[Effect]

By attaching the cleaning mechanism to the support member, the support member for the cleaning mechanism becomes unnecessary, so that even if the cleaning mechanism is attached to the rotary head device, an increase in volume can be reduced.

〔Example〕

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a sectional view for explaining the structure of a rotary head device using the present invention, and FIGS. 2 to 4 are top views showing the operation of the cleaning mechanism. In addition,
Components similar to those of the conventional apparatus shown in FIGS. 7 and 8 are designated by the same reference numerals.

In the 11th ffi, an opening is formed in the center of the support member 30, and a head cleaning mechanism is provided in this opening. That is, a roller 31 that removes deposits from the head, a roller arm 32 that rotatably supports the roller 31, and an arm holder 33 that rotatably supports the roller arm 32 are attached to the support member 30. placed in the opening. FIG. 2 is an explanatory diagram of this cleaning mechanism seen from above, and shows the support member 33.
is shown partially cut away. FIG. 2 is also an explanatory diagram of the tape loading operation. As shown in FIG. 2, the roller arm 32 is rotatably supported substantially at the center by a support 34 of an arm holder 33, and a tension spring 35 is attached to the opposite side from the roller 31.

On the other hand, on the loading mechanism side, a lever 36 is disposed so as to be in contact with one end 32b of the roller arm 32, and is rotatably supported approximately at the center by a support 38. This lever 36 is in contact with the arm holder 32, and the other end is biased by a tension spring 37. Here, the force of the spring 37 is set to be greater than the tension spring 35 so as to separate the roller 31 from the rotating tram 3.

The operation of the cleaning mechanism configured as described above is explained as follows.
This will be explained with reference to FIG. 4. FIG. 2 shows a first state in which the tape is being loaded, and in this state the roller 31 is separated from the magnetic head 1.2. FIG. 3 shows a second state in which loading has further progressed. In this state, the tape guide 26 is connected to one end 36b of the lever 36.
By pressing , the bias of the roller arm 32 is released, and the roller 31 is pressed against the rotating drum 3 by the tension spring 35 and comes into contact with the magnetic head 1.2 to perform cleaning. When the loading progresses further and the loading is completed, the tape guide 26 is moved to the lever 3 as shown in FIG.
6 and the roller arm 32 is rotated by the lever 36, and the roller 31 is separated from the rotating tram 3.

As explained above, due to the contact between the roller 31 and the magnetic head 1.2, the magnetic powder adhering to the head surface adheres to the roller side, and the adhering matter on the head surface is removed. Thereby, signals can be efficiently transmitted to the magnetic tape, and recording and reproduction of signals with less noise can be ensured.

Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. 5 and 6 are top views of a rotary head device using the present invention. In FIGS. 5 and 6, the same reference numerals as in FIGS. 1 and 2 indicate the same functional structure. Indicates an element. The rotary head device with a cleaning mechanism shown in FIG. 5 has a structure in which a piezoelectric actuator 4o is also attached to a support member 3o as a device for driving a roller arm during cleaning.

Here, the piezoelectric actuator 40 is made by pasting together two or more phases of piezoelectric elements that expand and contract depending on voltage, and can be bent by applying voltage. Normally, as shown in Fig. 5, the roller arm 41 is pushed and the roller 31 is moved magnetically to the rad 1.
．． However, by applying a voltage, the piezoelectric actuator 40 bends as shown in FIG. 6, and the roller arm 41 is pressed against the rotating drum 3 by the force of the spring 35, and the magnetic head 1. 2 cleaning is performed. As described above, in the second embodiment, the cleaning roller can be pressed against the head regardless of the operation of the loading mechanism, so that it is suitable for a time-lapse type VTR that performs intermittent recording over a long period of time. Normally, the tape position shifts due to the tape loading operation, so in order to align the recording position, it is necessary to rewind the tape one degree and feed it to the previously recorded position. However, in the second embodiment, even when cleaning the head, the head can be cleaned without operating the loading mechanism.
There is no need to perform unnecessary operations such as rewinding the tape. Further, in the second embodiment, since the cleaning mechanism is moved, there is no need for a mechanism for extracting power from the loading mechanism or other mechanism.

Since the entire mechanism can be easily constructed, a highly reliable recording and reproducing mechanism can be realized. Furthermore, if the tape is replaced frequently, the head does not need to be cleaned more than necessary.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to realize a small rotary head device even if a head cleaning mechanism is provided in a rotary head device in which a tape is built into a one-rotation drum.

[Brief explanation of drawings]

1 to 4 relate to a first embodiment of the present invention, in which FIG. 1 is a sectional view of the rotary head device, and FIGS. 2 to 4 are top views of the rotary head device. 5 and 6 relate to the second embodiment of the present invention, and FIG.
6 are top views of the cleaning mechanism, respectively. FIGS. 7 and 8 are a sectional view and a top view showing a conventional rotary head device. 1.2...Magnetic head, 3...Rotating drum,
10... Fixed drum, 13... Motor, 16...
...Stator coil, 18.30...Supporting member, 28...Magnetic tape,
31...Roller, 32...Roller arm, 33.Arm holder, 4
o...Piezoelectric actuator. Figure 1/, 2-11 λ waveform, He, Do 3-m-Rotating drum/θ--~A B and drum/3-11 Motor 16--Stator 30--1 Support part 3/---'0-ra 32--1 loafer person 33-11 arm holder palanquin 2 figure 4- figure 1.2--1 evacuation head 3-8 rolling drum 26.27--- Hand roller 28--Care tape 30-Leather member 31--One roller 32--One roller arm 33,--Arm holder No. 5

Claims (1)

[Scope of Claims] 1. A rotating drum (3) having a substantially disc-shaped portion; a fixed drum (10) disposed concentrically with the rotating drum (3) and having a cylindrical outer peripheral surface; A magnetic head (
1, 2), and a motor (3) for rotating the rotary drum (3), which is disposed on a surface different from the head fixing surface of the rotary drum (3).
13), and a support member (18) disposed on the side surface of the fixed drum (10) and supporting the stator (16) of the motor (13).
), A holding member (32) rotatably holding an elastic roller (31) is swingably supported by the supporting member (30), and the magnetic head is (1, 2) and the roller (31
1. A rotary head device with a head cleaning mechanism, characterized in that the rotary head device is equipped with a structure capable of bringing the head into and out of the head. 2. The rotary head device with a head cleaning mechanism according to claim 1, wherein a drive source (41) for swinging the holding member (40) is provided on the support member (30). Rotating head device.