JPH064434Y2 - Mounting structure for rotating head device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention uses a magnetic tape such as a digital audio tape player or a VCR as a recording medium, and uses a rotary head on the recording medium. The present invention relates to a tape player adapted to perform recording / reproduction, and more particularly to a technique for mounting a rotary head device including a rotary head and a drive motor thereof in a tilted state with respect to a chassis of the tape player.

(Prior Art) As a technique for fixing the rotary head device to the chassis in an inclined state, a technique as shown in FIG. 4 is known.

That is, a cylinder base 2 having a central axis inclined with respect to the chassis 1 is fixed to the upper surface of the chassis 1, and the mounting surface 2a of the upper surface of the cylinder base 2 is attached to the fixed cylinder 4 of the rotary head device 3. The flange 5 is superposed from above, and both are screwed from above.

(Problems to be solved by the invention) By the way, at the time of recording / reproducing by the tape player, it is necessary to bring the tape into close contact with the surface of the rotary head 6. This tape contacting operation is performed by moving the two inclined posts 7 and 7 which are apart from each other when the tape player is stopped toward the rotary head 6 side by using the guide grooves 8 and 8 provided in the chassis 1. This is performed by pressing the middle portion of the tape, which is stretched over the inclined posts 7 of the book, against the surface of the rotary head 6. In this case, the guide grooves 8 and 8 of the inclined posts 7 and 7 provided on the chassis 1 need to be provided close to the rotary head 6 in order to bring the inclined posts 7 and 7 close to the surface of the rotary head.

However, in the conventional mounting structure as described above, the rotary head 6 and the chassis 1 provided on the rotary head device 3 are provided.
Since the height from the surface is large, and the distance L between the lower end of the cylinder base 2 and the upper end of the rotary head 6 is large accordingly,
The guide grooves 8 and 8 cannot be brought close to the rotary head 6.

Therefore, in the conventional mounting structure, a large and tall support member 9 that can avoid the cylinder base 2 is attached to the guide groove 8, and the inclined post 7 is fixed to the support member 9. However, the use of such a large-sized supporting member hinders downsizing of the tape player, and the deflection of the tip of the inclined post 7 becomes large, resulting in a decrease in tape positioning accuracy.

The present invention has been proposed to solve the above-mentioned problems of the prior art, and reduces the amount of protrusion of the cylinder base from the chassis surface to reduce the distance between the rotary head and the guide groove provided in the chassis. It is an object of the present invention to provide a mounting structure for a rotary head device, which shortens the size of a support member for an inclined post and accordingly improves the positioning accuracy of a tape.

[Construction of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the rotary head mounting structure of the present invention has an insertion hole for a rotary head device formed at a central portion and a central axis thereof. A cylinder base tilted in the tilt direction of the rotary head device; a lower surface of the cylinder base exposed below the chassis when the cylinder base is mounted in the rotary head insertion hole of the chassis; and a fixed cylinder of the rotary head device. And a mounting flange that is provided and fixed to the lower surface of the cylinder base from below the chassis.

(Operation) In the present invention having the above-described configuration, unlike the conventional cylinder base in which the whole is exposed on the surface of the chassis, the lower part of the cylinder base is exposed on the lower surface of the chassis. The amount of protrusion of the cylinder base is reduced, and the rotary head can be brought closer to the chassis and the inclined posts provided therein, respectively, and the guide post support member can be downsized.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to the drawings.

* Structure of Embodiment * As shown in the partially sectional view of the assembled state of FIG. 1 and the partially sectional view of the disassembled state of FIG. 2, in the present embodiment, the rotary head device 11 includes the upper rotary head. 12, a fixed cylinder 13 supporting the fixed cylinder 13, a motor 14 provided below the fixed cylinder 13, and a mounting flange 15 fixed to the outer periphery of the fixed cylinder 13.

On the other hand, a circular rotary head device insertion hole 22 having a radius that allows the rotary head 12 of the rotary head device 11 and the fixed cylinder 13 to pass therethrough is formed in the chassis 21 of the tape player. Cylinder base 31
Are fixed from the front surface side of the chassis 21. That is, as shown in the plan view of FIG. 3, the cylinder base 31 is a ring-shaped member in which the insertion hole 32 of the rotary head device 11 is formed in the center, and the ring portion 33 is superposed on the surface of the chassis 21. At the same time, it is fixed to the chassis 21 by being screwed to the chassis 21 using the screw holes 35 of the two mounting flanges 34 provided around the ring portion 33.

At the edge of the rotary head device insertion hole 22 formed in the chassis 21, two notches 23 are provided to expose a part of the cylinder base 31 to the lower surface of the chassis 21. Further, the lower surfaces of the two mounting flanges 34 provided on the cylinder base 31 protrude below the lower surface of the ring portion 33, pass through the notches 23, and pass through the chassis 21.
Exposed below. The lower surface of the mounting flange 34 is inclined with respect to the chassis 21 at a predetermined angle to form a mounting surface 36 for the rotary head device 11.

The rotary head device 11 is fixed to the mounting surface 36 from below. That is, with the upper parts of the rotary head 12 and the fixed cylinder 13 projected to the upper part of the chassis 21 through the insertion holes 22 and 32 formed in the chassis 21 and the cylinder base 31, the mounting flange 15 provided on the outer periphery of the fixed cylinder 13 is the above-mentioned. The two are superposed on the mounting surface 36 and screwed together.

* Operation of Embodiment * In the present embodiment having the above-mentioned configuration, the mounting surface 3 of the cylinder base 31 for fixing the rotary head device 11 is described.
Since 6 is located on the lower surface of the chassis 21, the mounting position of the cylinder base 31 with respect to the chassis 21 is lowered, and the distance between the tip of the cylinder base 31 and the surface of the chassis 21 is shortened accordingly. As a result, the guide groove of the tilted post can be brought close to the rotary head device, and the support member of the tilted post can be downsized, so that the overall size of the device and the positioning accuracy of the tilted post can be improved.

* Other Embodiments * The present invention is not limited to the above embodiments, but the bottom surface (rotary head device mounting surface) of the cylinder base exposed on the lower surface of the chassis is formed horizontally, and the mounting flange is formed on the fixed cylinder. It can also be applied to a mounting structure in which the is inclined.

Alternatively, the cylinder base itself may be fixed to the chassis from the bottom surface of the chassis to expose the mounting surface of the bottom of the cylinder base to the bottom surface of the chassis.

[Advantages of the Invention] As described above, according to the present invention, the fixed cylinder can be mounted from below the chassis by a simple means of exposing the mounting surface formed on the lower surface of the cylinder base below the chassis. As a result, the protruding height of the rotary head from the chassis surface is reduced, and the height of the inclined post for tape guide can be suppressed to that low, and a compact and highly accurate rotary head device can be obtained. .

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a rotary head device mounting structure according to the present invention, FIG. 2 is a partial sectional view of the same in an exploded state, and FIG. 3 is a cylinder base in the embodiment of FIG. FIG. 4 is a sectional view showing an example of a conventional mounting structure. 11 ... Rotary head device, 12 ... Rotary head, 13 ...
... fixed cylinder, 14 ... motor, 15 ... mounting flange, 21 ... chassis, 22 ... rotary head device insertion hole, 23 ... notch, 31 ... cylinder base, 32 ...
… Insertion hole, 33 …… Ring part, 34… Mounting flange,
35: Screw hole, 36: Mounting surface.

Claims (1)

[Scope of utility model registration request] 1. A rotary head device comprising a motor, a fixed cylinder supporting the motor, and a rotary head supported by the fixed cylinder and rotated by the motor, is fixed to a chassis such that a central axis of the rotary head device is inclined. In the mounting structure of the rotary head, the cylinder base insertion hole 22 is formed in the horizontally arranged chassis 21, and the cylinder base insertion hole 22 is formed in the chassis.
For the above, from the upper surface side of the chassis 21, the cylinder base 31 having the insertion hole 32 of the rotary head device in the center is inserted and fixed, and the lower surface of the cylinder base 31 exposed on the lower surface of the chassis 21 is fixed. Is provided with a mounting flange 34, and a fixed flange 15 for fixing to the mounting flange 34 is provided on the side of the rotary head device. Inclination with respect to the chassis 21 by an amount corresponding to the mounting angle of the cylinder 21 from the lower surface side of the chassis 21
2. A rotary head device mounting structure, characterized in that a rotary head device is inserted into 2 and a fixing flange 15 of the rotary head device is fixed to the mounting flange 34.