JP3458489B2 - Position adjustment mechanism of magnetic head device and tape drive 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 for adjusting a sliding state between a magnetic tape of a tape cassette loaded in a cassette holder and a magnetic head.
The present invention relates to a position adjusting device for a magnetic head device that adjusts the position of a magnetic head device with respect to a magnetic tape, and a magnetic recording / reproducing device equipped with this position adjusting device.

[0002]

2. Description of the Related Art A position adjusting device for a magnetic head device used in a magnetic recording / reproducing apparatus is designed so that a magnetic gap of a magnetic head mounted in the magnetic head device is different from a magnetic tape of a tape cassette loaded in a cassette holder. Is a position rotated about an axis parallel to the running direction of the magnetic tape (hereinafter referred to as a tilt position) and a position rotated about an axis perpendicular to the magnetic tape (hereinafter referred to as an azimuth angle direction). (Referred to as position).

That is, the position adjusting device of the magnetic head device slides between the magnetic head device and the magnetic tape by adjusting the position of the magnetic head device in the tilt direction and the position of the azimuth angle direction with respect to the magnetic tape of the tape cassette. The state is adjusted to ensure good recording and playback operations.

A conventional magnetic head device position adjusting device 60
Will be described with reference to FIGS. 7 and 8. The position adjusting device 60 of the magnetic head device is roughly described as follows.
0, a head base 51 on which the magnetic head device 50 is mounted, a slide guide member 53 supported by the head base 51, and a cassette holder 61 slidably supported on both ends of the slide guide member 53. It is composed of a mounted cassette base 52.

The magnetic head device 50 is a drum type magnetic head device in which a head drum provided with a magnetic head (not shown) is rotatably provided. The magnetic head device 50 is mounted on the head base 51 at a substantially central portion on the main surface.

Further, the head base 51 has one end portion facing the cassette holder 61 mounted on the cassette base 52 (hereinafter, referred to as one end portion on the head front side) (hereinafter, referred to as the head rear side). The screw mounting holes 54 and 55 are formed at both ends of the one end).

The head base 51 has screw mounting holes 54.
A first adjusting screw 54 is screwed into the first adjusting screw 54 and is provided between the tip end of the first adjusting screw 54 and the slide guide member 53. Is provided.

A second adjusting screw 55 is screwed into the screw mounting hole 55 of the head base 51, and the tip end of the second adjusting screw 55 and the slide guide member 53.
And a leaf spring 58 having a substantially C-shaped cross section, which is provided between the head spring 51 and the head base 51. The slide guide member 53 is supported by the first adjusting screw 54 and the second adjusting screw 55, and also supports the cassette base 52 at both ends so as to be slidably movable.

The cassette base 52 is provided with a substantially U-shaped opening 52A on the main surface thereof.
A cassette holder 61 for loading a tape cassette is provided adjacent to. Further, a screw mounting hole 52B is formed in the cassette base 52 at the center of one end of the opening 52A facing the head base.

The cassette base 52 has screw mounting holes 5
A second adjusting screw 56 is screwed into 2B, and the third adjusting screw 56 is provided between the tip end of the third adjusting screw 56 and the head base 51, and both ends thereof are hung on the cassette base 52 and have a substantially C-shaped cross section. Is provided.

The operation of adjusting the position in the azimuth angle direction and the position in the tilting direction in the position adjusting device 60 of the magnetic head device constructed as described above will be described below. First, the position adjusting device 60 of the magnetic head device adjusts the position in the azimuth angle direction by using the first adjusting screw 54 and the second adjusting screw 54.
The adjusting screw 55 is screwed in.

In the position adjusting device 60 of the magnetic head device, the tip ends of the first adjusting screw 54 and the second adjusting screw 55 are screwed into the first adjusting screw 54 and the second adjusting screw 55. The leaf springs 57 and 58 are elastically deformed to move the slide guide member 53.

In the head base 51, the slide guide member 53 is moved to move the slide guide member 53.
The facing distance between and is adjusted. Therefore, the head base 5
In No. 1, the facing distance between the slide guide member 53 and the cassette base 52 supported by both ends of the slide guide member 53 is adjusted by adjusting the facing distance.

That is, in the position adjusting device 60 of the magnetic head device, the first adjusting screw 54 and the second adjusting screw 55 are respectively screwed into the magnetic head device 5 to cause the magnetic head device 5 to move.
The position of 0 in the azimuth angle direction is arbitrarily adjusted.

Next, the position adjusting device 60 of the magnetic head device.
The third adjustment screw 56 is screwed in when adjusting the position of the magnetic head device 50 in the tilting direction. In the position adjusting device 60 of the magnetic head device, the tip end portion of the third adjusting screw 56 elastically deforms the leaf spring 59 by screwing the third adjusting screw 56 into the head base 51 and the cassette base 52. The facing interval of is adjusted.

Therefore, the head base 51 is tilted with respect to the cassette base 52 to move the position of the magnetic head device 50 in the tilting direction. That is, in the position adjusting device 60 of the magnetic head device, the position in the tilt direction of the magnetic head device 50 is arbitrarily adjusted by screwing in the third adjusting screw 56.

[0017]

As described above, in the conventional position adjusting device 60 of the magnetic head device, the head base 51 is provided with respect to the cassette base 52 with respect to the first adjusting screw 54 to the third adjusting screw. Three-point support by 56. Therefore, the position adjusting device 60 of the magnetic head device is
By receiving an impact from the outside, the head base 5
1 and the slide guide member 53 are deformed, and the magnetic head device 50 is liable to be misaligned.

A position adjusting device 60 for the magnetic head device is also provided.
Is adjusted by adjusting the first adjusting screw 54 and the second adjusting screw 55, the position of the magnetic head device 50 in the azimuth angle direction and the position of the tilting direction are displaced at the same time. There is a problem that it is difficult to finely adjust the position.

Further, the position adjusting device 6 of the magnetic head device
0 means that the first adjusting screw 54 and the second adjusting screw 55 are
The magnetic head device 50 is provided at both ends of the head rear end of the head base 51 away from the magnetic gap of the sliding surface of the magnetic head device 50.

Therefore, the position adjusting device 60 of the magnetic head device has a large displacement amount of the position of the magnetic head device 50 by screwing the first adjusting screw 54 and the second adjusting screw 55, and in particular, the magnetic head device. The displacement amount of the position 50 in the tilt direction is large. Therefore, the position adjusting device 60 of the magnetic head device has a problem that it is difficult to finely adjust the position of the magnetic head device 50.

As a measure for reducing the amount of displacement of the magnetic head device 50, the first adjusting screw 54 and the second adjusting screw 55 are provided at both ends of the head front end of the head base 51. By doing so, it is conceivable to bring it closer to the magnetic gap of the sliding surface of the magnetic head device 50.

However, in consideration of the balance for supporting the magnetic head device 50, the head base 51 is required to be supported at three points and the center of gravity of a triangle connecting these three points must match the center of gravity of the magnetic head device 50. Is. Therefore, the third adjusting screw 56 needs to be provided at the center of one end of the head base 51 on the head rear side.

However, due to the structure in which the head base 51 slides with respect to the cassette base 52, it is difficult to provide a fulcrum by providing the third adjusting screw 56 at the center of one end portion on the rear side of the head. Not realized.

Therefore, according to the present invention, the position of the magnetic head device with respect to the magnetic tape of the tape cassette loaded in the cassette holder can be easily and reliably finely adjusted, and the positional deviation of the magnetic head device is reduced. An object is to provide a position adjusting device for a magnetic head device.

[0025]

In order to achieve the above-mentioned object, a position adjusting device for a magnetic head device according to the present invention comprises:
A head base provided with a magnetic head device equipped with a magnetic head, a cassette base provided with a cassette holder for inserting / removing a tape cassette, and a head base support member having the head base attached, A link member having a central portion swingably connected to the head base support member and one end portion swingably connected to the head base, and both end portions of the head base on one end side facing the cassette holder. The first and second adjusting screws, which are respectively arranged to adjust the facing distance between the head base and the cassette holder, and the head base, which is provided by connecting the head base and one end of the link member to each other. A third adjusting screw for adjusting a facing interval with the link member, wherein the head base includes the first and second adjusting screws, and the head. Is obtained by supporting the cassette base by four points of the supporting portion over scan is provided at both ends of the head base support member mounted.

The head base is provided between the tip of the first adjusting screw and the second adjusting screw and the cassette base to correspond to the first adjusting screw and the second adjusting screw. A first elastic means and a second elastic means for applying elastic force are provided respectively. Further, third elastic means for applying elastic force to the third adjusting screw is provided between the head base and the link member. Furthermore, the link member is provided with a fixing screw at one end which is fixed to the head base and cannot be swung after the distance between the link member and the head base is adjusted by the third adjusting screw.

Further, the present invention is a magnetic tape driving device provided with the position adjusting device of the magnetic head device described above.

[0028]

The position adjusting device for the magnetic head device according to the present invention comprises a first adjusting screw and a second adjusting screw provided on the head base.
Since the facing distance between the head base and the cassette base is adjusted by screwing in the adjusting screw of, the position of the magnetic head device arranged on the head base in the tilt direction is adjusted.

In the position adjusting device of the magnetic head device, the first adjusting screw and the second adjusting screw for adjusting the facing distance between the head base and the cassette base face one end of the head base facing the cassette holder. By being provided at both ends of the magnetic head device, the displacement amount of the position of the magnetic head device due to the screwing of the first adjusting screw and the second adjusting screw is reduced.

The position adjusting device of the magnetic head device is
When the third adjusting screw is screwed in, the link member is swung to move the head base connected to one end of the link member. Therefore, the head base is
It is tilted in the azimuth angle direction with respect to the cassette base,
The position of the magnetic head device arranged on this head base in the azimuth angle direction is adjusted.

Further, in the head base, between the tip portions of the first adjusting screw and the second adjusting screw and the cassette base, an elastic force corresponding to the first adjusting screw and the second adjusting screw is provided. By the provision of the first elastic means and the second elastic means, respectively, for applying the force, the first adjusting screw and the second adjusting screw resist the elastic force of the first elastic means and the second elastic means. And screwed. Therefore, the displacement amount of the facing distance between the head base and the cassette base due to the screwing of the first adjusting screw and the second adjusting screw is small.

Furthermore, since the head base is provided with the third elastic means for applying the elastic force to the third adjusting screw between the head base and the link member, the third adjusting screw has the third elasticity. It is screwed against the elastic force of the means. Therefore, the displacement amount of the head base facing the link member due to the screwing of the third adjusting screw is small. Further, the link member is fixed to the head base by the fixing screw after the distance between the link member and the head base is adjusted by the third adjusting screw so that the link member cannot be swung.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to FIGS. The position adjusting device 1 for a magnetic head device according to the present invention is applied to a magnetic recording / reproducing device for recording / reproducing an information signal on / from the magnetic tape by running a magnetic tape contained in a tape cassette. The head sub-base 31 is rotatably connected to the head moving arm 30 and is disposed on the main surface of the head sub-base 31.

The head moving arm 30 is provided with a rotation fulcrum hole 30A at a substantially central portion thereof and is swingably arranged on a support shaft provided on a chassis member. Further, the head moving arm 30 is provided with a connecting portion 30B integrally protruding at one end thereof, and the head sub-base 31 is connected to the connecting portion 30B.

The position adjusting device 1 of the magnetic head device is disposed in the head sub-base 31, and the connecting portion 30B of the head sub-base 31 is inserted into the connecting hole 31A and is rotatably connected. Therefore, the position adjusting device 1 of the magnetic head device is slid through the head sub-base 31 as the head moving arm 30 rotates.

The position adjusting device 1 of this magnetic head device is
In general, a head base 5 on which the drum-type magnetic head device 3 is mounted, a cassette base 8 for supporting the cassette holder 4, a head base supporting member 6 for supporting the head base 5, and a head base supporting member 6 swingable. And a link member 7 provided on the.

As shown in FIGS. 1 to 6, the head base 5 is formed with a substantially U-shaped opening 10 that opens at the base end of the main surface portion 5A, and is adjacent to this opening 10. A first mounting hole 11A and a second mounting hole 11B facing each other, and a third mounting hole 11C facing each other.
And a fourth mounting hole 11D are provided respectively. The head base 5 is fixed to the first mounting hole 11A to the fourth mounting hole 11D by screwing the drum type magnetic head device 3 having the head drum 3A mounted thereon.

Further, the head base 5 is provided with a notch at the opening edge of the opening 10 so as to attach a tape drive mechanism (not shown). The tape drive mechanism is connected to the rotary shaft of the head drum 3A of the drum type magnetic head device 3, and is driven by rotationally driving the rotary shaft.

Further, the head base 5 is integrally provided with a substantially U-shaped stopper slit 5F at one end of the main surface 5A facing the cassette holder 4. The cassette base 8 is provided with a stopper protrusion 8A at a position corresponding to the stopper slit 5F, and the stopper protrusion 8A is inserted into the stopper slit 5F.

The head base 5 has a stopper slit 5
A first slide guide portion 5G is provided adjacent to F. The cassette base 8 is provided with a screw hole (not shown) at a position corresponding to the first slide guide portion 5G, and the slide guide screw inserted into the first slide guide portion 5G is inserted into the screw hole. 8B is screwed.

Therefore, the head base 5 is slidable in the S direction shown in FIG. 2 via the slide guide screw 8B which is slidably inserted into the cassette base 8 along the first slide guide portion 5G. Supported by.

The head base 5 is provided with a second slide guide portion 5H integrally protruding from one end of the main surface 5A. Then, in the cassette base 8, this second
A guide slit 8C is provided at a position corresponding to the slide guide portion 5H, and the second slide guide portion 5H is slidably inserted into the guide slit 8C. Therefore, the head base 5 is inserted into the cassette base 8 through the second slide guide portion 5H that is slidably inserted into the guide slit 8C.
It is slidably supported in the S direction shown in FIG.

The head base 5 has a first adjusting screw mounting portion 20A at both ends of one end portion on the front side of the head facing the cassette holder 4 provided on the cassette base 8 of the main surface 5A.
And the second adjusting screw attaching portion 20B are integrally provided. The head base 5 has the first adjustment screw attachment portion 20A and the second adjustment screw attachment portion 20B.
A first adjusting screw mounting hole 5P and a second adjusting screw mounting hole 5Q are formed in each.

In the head base 5, the first adjusting screw 12A and the second adjusting screw 12B are provided in the first adjusting screw attaching hole 5P and the second adjusting screw attaching hole 5Q, respectively.
The tip ends of the adjusting screw 12A and the second adjusting screw 12B are respectively screwed into the cassette base 8 in such a direction as to come into contact with the cassette base 8.

The head base 5 is provided between the tip ends of the first adjusting screw 12A and the second adjusting screw 12B and the cassette base 8 and has a cross-section of approximately C at which both ends are hung on the head base 5. Character-shaped first leaf spring 13A and second
The leaf springs 13B are provided respectively. These first
The plate spring 13A and the second plate spring 13B are provided with substantially elliptical contact protrusions 14A and 14B that are in contact with the cassette base 8 and that bulge toward the outer peripheral side.

The head base 5 is integrally provided with a first head holding portion 5B and a second head holding portion 5C, which are bent in a substantially L shape, at both end portions on the base end side of the main surface 5A. Has been. The head base 5 is integrally provided with a third adjusting screw attaching portion 5I in which a tip end portion of the first head holding portion 5B is bent in parallel with the main surface portion 5A. An adjustment screw attachment hole 5J is formed in the third adjustment screw attachment portion 5I.

Further, the head base 5 is integrally provided with a first mounting portion 5K bent in a substantially L-shape at one end of the third adjusting screw mounting portion 5I, and also in the second portion. A second mounting portion 5L bent in a substantially L shape is integrally provided at one end of the head holding portion 5A.

A substantially U-shaped cutout portion 5R is continuously provided on the second mounting portion 5L, and a connection wiring (not shown) connected to the drum type magnetic head device 3 is connected to the cutout portion 5R. It is sandwiched and installed.

Further, the head base 5 is integrally provided with a third mounting portion 5M and a fourth mounting portion 5N, which are bent in a substantially L shape, at both end portions of the base end portion. The head base 5 is provided with a fixing screw mounting hole 5S in the third mounting portion 5M and in the fourth mounting portion 5N.
A connecting shaft mounting hole 5T is formed.

The link member 7 is provided with a first connecting shaft mounting hole 7B at one end of the main surface portion 7A.
A second connecting shaft mounting hole 7C is formed at a position substantially in the center of A. Further, the link member 7 is provided with a fixing screw attachment hole 7D at the other end.

In this link member 7, the connecting shaft mounting hole 5T of the head base 5 and the first connecting shaft mounting hole 7B have the same axis, and the fixing screw mounting hole 5S and the fixing screw mounting hole 7D of the head base 5 are formed. And are overlapped with their axes aligned.

Then, in the link member 7 superposed on the head base 5, the fixing screw 18 is screwed into the fixing screw mounting hole 7D and the fixing screw mounting hole 5S of the head base 5 from the base end side of the head base 5. It is tightened.

Further, in the link member 7, the first connecting shaft 16 is inserted into the connecting shaft mounting hole 5T of the head base 5, and the first connecting shaft 16 is attached to the first connecting shaft mounting hole 7B.
It is fixed by being crimped to. Therefore, the link member 7 includes the first connecting shaft 16 inserted into the head base 5.
It is swingably supported by the head base 5 via.

Further, the link member 7 attached to the head base 5 has a third protrusion provided integrally on the head base 5 so as to integrally project from the side end portion of the one end portion where the fixing screw attachment hole 7D is formed. An adjusting screw attaching portion 5I and an adjusting screw attaching portion 7E bent in parallel with each other are integrally provided.

The link member 7 has an adjusting screw attachment portion 7E.
An adjusting screw attachment hole 7F is formed in the. The third adjusting screw 15 is screwed into the adjusting screw mounting hole 5J of the head base 5, is inserted into the coil spring 19 and is screwed into the adjusting screw mounting hole 7F of the link member 7. The coil spring 19 is arranged such that both ends of the coil spring 19 are in contact with the adjusting screw mounting portion 5I of the head base 5 and the adjusting screw mounting portion 7E of the link member 7, respectively.

The head base support member 6 is provided with a second connecting shaft mounting hole 6B at a substantially central portion of a main surface portion 6A formed in a substantially U-shaped plate shape. Further, the head base support member 6 is provided with a substantially rectangular fixing screw fastening window 6E at one end of the main surface portion 6A.

The head base support member 6 is provided with a first mounting portion 6F and a second mounting portion 6G at both ends of the main surface portion 6A. Further, the head base support member 6 has a first mounting portion 6F and a second mounting portion 6G, and a first mounting portion 5K of the head base 5.
And the second mounting portion 5L are sandwiched and mounted.

That is, these head base support members 6
The head base 5 is attached by elastic force due to elastic deformation of the first attachment portion 6F and the second attachment portion 6G, and the first attachment portion 5K and the second attachment portion 5L.

The head base support member 6 has a main surface portion 6A.
A first cassette base support portion 6H and a second cassette base support portion 6I, which are bent in a substantially L shape, are integrally provided at both end portions of the. As shown in FIGS. 4 to 6, the first cassette base support 6H and the second cassette base support 6I are provided with guide slits 6J and 6K each having an open end. There is. The cassette base 8 is slidably inserted into and supported by the guide slits 6J and 6K of the head base support member 6.

The head base support member 6 is the second
The second connecting shaft 17 is inserted into the connecting shaft mounting hole 6B of the link member 7 and the connecting shaft mounting hole 7C of the link member 7, and the second connecting shaft 17 is caulked and fixed in the second connecting shaft mounting hole 6B. ing. Therefore, the link member 7 is swingably supported by the head base support member 6 via the second connecting shaft 17.

A drum-type magnetic head device 3 mounted on the position adjusting device 1 of the magnetic head device constructed as described above.
The operation of adjusting the position of will be described. First, when adjusting the position of the drum type magnetic head device 3 in the azimuth angle direction, the position adjusting device 1 of the magnetic head device loosens and fixes the fixing screw 18 fixing the head base 5 and the link member 7. To release.

The link member 7 becomes swingable about the second connecting shaft 17 as a fulcrum when the fixation of the head base 5 by the fixing screw 18 is released. Then, in the position adjusting device 1 of the magnetic head device, the third adjusting screw 15 provided on the adjusting screw attaching portion 5I of the head base 5 is screwed.

The position adjusting device 1 of the magnetic head device is the third
The adjustment screw 15 is screwed in to adjust the facing distance between the adjustment screw attachment portion 5I of the head base 5 and the adjustment screw attachment portion 7E of the link member 7, and the adjustment screw attachment portion 7E moves.

The link member 7 is swung about the second connecting shaft 17 as a fulcrum when the adjusting screw attaching portion 7E is moved, and the first connecting shaft attaching hole 7B formed at one end is moved. To be done. When the first connecting shaft mounting hole 7B is moved, the link member 7 moves the first connecting shaft 16 through the first connecting shaft 16 fixed in the first connecting shaft mounting hole 7B. The connecting shaft mounting hole 5T of the inserted head base 5 is moved.

The head base 5 is swung in the direction A shown in FIG. 3 and tilted by the movement of the connecting shaft mounting hole 5T. That is, the position of the drum type magnetic head device 3 mounted on the head base 5 is adjusted in the azimuth angle direction. The position adjusting device 1 of the magnetic head device adjusts the position of the drum type magnetic head device 3 by tightening the fixing screw 18 after the position of the drum type magnetic head device 3 in the azimuth angle direction is adjusted. Fixed.

Therefore, in the position adjusting device 1 of the magnetic head device, the azimuth angle of the drum-type magnetic head device 3 arranged on the head base 5 via the link member 7 by screwing in the third adjusting screw 15. The position in the direction is arbitrarily moved and adjusted.

Next, the position adjusting device 1 of the magnetic head device
Is a first adjustment screw 1 provided on the head base 5 when adjusting the position of the drum type magnetic head device 3 in the tilting direction.
2A and the second adjusting screw 12B are respectively screwed. These first adjusting screw 12A and second adjusting screw 1
2B is screwed into the tip end of the first leaf spring 13A and the second leaf spring 13B so that the tip ends of the tip end contact the inner circumferential portions of the first leaf spring 13A and the second leaf spring 13B.
Respectively elastically deform.

The first leaf spring 13A and the second leaf spring 13B are elastically deformed by the first adjusting screw 12A and the second adjusting screw 12B, so that the contact portion 1
4A and 14B move. Therefore, the head base 5
With the contact portions 14A and 14B of the first leaf spring 13A and the second leaf spring 13B, respectively, the facing distance to the cassette base 8 is adjusted.

Therefore, since the head base 5 is tilted in the B direction shown in FIGS. 5 and 6, the position of the drum type magnetic head device 3 is moved and adjusted. Then, the position adjusting device 1 of the magnetic head device 3 uses the jig (not shown) having a reference surface for positioning the drum magnetic head device 3 in the azimuth angle direction.
And the relative position of the cassette holder 4 are positioned.

That is, the position adjusting device 1 of the magnetic head device includes the first adjusting screw 12A and the second adjusting screw 12B.
By screwing in, the position of the drum type magnetic head device 3 in the tilting direction is arbitrarily moved and adjusted.

Further, the position adjusting device 1 of the magnetic head device
By adjusting the screwing amounts of the first adjusting screw 12A and the second adjusting screw 12B, respectively, the displacement amounts of the contact portions 14A and 14B can be appropriately adjusted. Therefore, the position adjusting device 1 of the magnetic head device
By screwing the first adjusting screw 12A and the second adjusting screw 12B into the drum type magnetic head device 3
The position in the azimuth angle direction of can also be arbitrarily adjusted.

As described above, the position adjusting device 1 of the magnetic head device according to the present invention apparently has the head base 5.
Of the first cassette base support portion 6H and the second base of the head base support member 6 to which the head base 5 is attached.
The cassette base 8 is supported at each of the two locations including the cassette base support portion 6I.

Therefore, the head base 5 is apparently
The cassette base 8 is supported at four points, that is, the first cassette base supporting portion 6H and the second cassette base supporting portion 6I of the head base supporting member 6 and the first adjusting screw 12A and the second adjusting screw 12B. Therefore, the deformation due to the impact received from the outside and the positional deviation of the drum type magnetic head device 3 are reduced.

Further, in the head base 5, the second connecting shaft 17 substantially supports the cassette base 8 via the link member 7. Therefore, the head base 5 supports the cassette base 8 at three points of the second connecting shaft 17, the first adjusting screw 12A and the second adjusting screw 12B.

Therefore, in the head base 5, the center of gravity of the triangle connecting the above-mentioned three points has the drum-type magnetic head device 3.
Since it coincides with the center of gravity of, the balance for supporting the drum type magnetic head device 3 is maintained in a good state.

In the position adjusting device 1 of the magnetic head device according to the present invention, when the third adjusting screw 15 is screwed in, the head base 5 is tilted via the link member 7 and the magnetic head device 3 of the drum type magnetic head device 3 is rotated. The position in the azimuth angle direction is adjusted. Therefore, when the head base 5 adjusts the position of the drum type magnetic head device 3 in the azimuth angle direction, the displacement amount due to the third adjustment screw 15 being screwed in is small, and therefore the azimuth of the drum type magnetic head device 3 is small. The position in the angular direction can be easily and reliably finely adjusted.

Therefore, the position adjusting device 1 of the magnetic head device according to the present invention first adjusts the position of the drum type magnetic head device 3 in the azimuth angle direction by the third adjusting screw 15 and then the first adjusting screw 15. Screw 12A and second adjusting screw 1
By adjusting the position of the drum type magnetic head device 3 in the tilting direction by 2B, the position of the drum type magnetic head device 3 is easily and reliably adjusted and the position accuracy is improved.

[0078]

As described above, according to the present invention, since the first adjusting screw and the second adjusting screw are provided at both ends of the one end facing the cassette holder, the position of the magnetic head device is improved. Can be easily and reliably finely adjusted. In addition, the position adjusting device of the magnetic head device is provided with the link member whose one end is swingably connected to the head base, so that the position of the magnetic head device can be easily and reliably finely adjusted.

Further, the position adjusting device of the magnetic head device apparently supports at four points of the supporting portions provided at both end portions of the head base supporting member and the first adjusting screw and the second adjusting screw. By doing so, it is possible to reduce an adverse effect due to an impact or the like received from the outside.

[Brief description of drawings]

FIG. 1 is a plan view showing a magnetic recording / reproducing device in which a position adjusting device for a magnetic head device according to the present invention is adopted.

FIG. 2 is a plan view showing a position adjusting device of a magnetic head device according to the present invention.

FIG. 3 is a front view showing a position adjusting device of the magnetic head device.

FIG. 4 is a rear view showing a position adjusting device of the magnetic head device.

FIG. 5 is a right side view of a partial cross section showing a position adjusting device of the magnetic head device.

FIG. 6 is a partial cross-sectional left side view showing the position adjusting device of the magnetic head device.

FIG. 7 is a schematic plan view showing a position adjusting device of a conventional magnetic head device.

FIG. 8 is a schematic side view showing a position adjusting device of a conventional magnetic head device.

[Explanation of symbols]

1 magnetic head device position adjusting device, 3 drum type magnetic head device, 4 cassette holder, 5 head base, 6 head base supporting member, 6H first cassette base supporting portion, 7 link member, 8 cassette base, 12A first Adjusting screw, 12B second adjusting screw, 13A, 13B leaf spring, 15 third adjusting screw, 16 first connecting shaft, 17 second connecting shaft, 18 fixing screw

Continuation of the front page (56) References JP-A-5-128450 (JP, A) JP-A-5-314601 (JP, A) Jikken 3-19050 (JP, Y2) (58) Fields investigated (Int .Cl. ⁷ , DB name) G11B 5/49 G11B 5/56-5/60 G11B 15/66-15/665 G11B 33/10-33/14

Claims (5)

(57) [Claims] 1. A head base on which a magnetic head device on which a magnetic head is mounted is arranged, a cassette base on which a cassette holder for inserting and removing a tape cassette is arranged, and a head base on which the head base is attached. A support member, a link member having a substantially central portion swingably connected to the head base support member, and one end portion swingably connected to the head base, and one end portion of the head base facing the cassette holder. First and second adjusting screws, which are respectively provided at both ends of the head base and adjust the facing distance between the head base and the cassette holder, and the head base and one end of the link member are connected to each other. And a third adjusting screw for adjusting a facing distance between the head base and the link member, wherein the head base includes the first and second adjusting screws. And,
A position adjusting device for a magnetic head device, characterized in that the cassette base is supported at four points with supporting portions provided at both ends of the head base supporting member to which the head base is attached. 2. The head base is provided between the tip ends of the first and second adjusting screws and the cassette base and corresponds to the first adjusting screw and the second adjusting screw. 2. The position adjusting device for a magnetic head device according to claim 1, further comprising first and second elastic means for applying elastic force. 3. The third elastic means for applying an elastic force to the third adjusting screw is provided between the head base and the link member. 2. A position adjusting device for a magnetic head device according to 2. 4. The link member, after the facing interval with the head base is adjusted by the third adjusting screw,
4. The position adjusting device for a magnetic head device according to claim 1, wherein a fixing screw that is fixed to the head base and is not swingable is provided at one end. 5. A head base provided with a magnetic head device having a magnetic head mounted thereon, a cassette base provided with a cassette holder for inserting and removing a tape cassette, and a head base provided with the head base. A support member, a link member having a substantially central portion swingably connected to the head base support member, and one end portion swingably connected to the head base, and one end portion of the head base facing the cassette holder. First and second adjusting screws, which are respectively provided at both ends of the head base and adjust the facing distance between the head base and the cassette holder, and the head base and one end of the link member are connected to each other. And a third adjusting screw for adjusting a facing distance between the head base and the link member, wherein the head base includes the first and second adjusting screws. Ji,
The magnetic tape pulled out from the tape cassette mounted on the cassette holder is supported by the head base supporting member to which the head base is attached at four points with supporting portions provided at both ends thereof. A magnetic recording / reproducing apparatus characterized in that the magnetic recording / reproducing apparatus is wound around a magnetic head device to run.