JPH0727622B2 - Fixed head mounting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting a fixed head of a magnetic recording reproducing apparatus having a rotating magnetic head.

(Prior art and its problems) Conventionally, in the structure in which the fixed head mounting bracket is integrally provided on the upper side of the fixed head of the magnetic recording / reproducing apparatus, the adjustment of the height direction with respect to the tape and the adjustment of the running direction, The tilt adjustment and the left-right tilt adjustment are not independently configured. In addition, recently, in VHS type VTR, it is known that the above adjustment can be performed independently, but this is because the movement of the head in the tape running direction is a rotational movement, and it is fixed. There is a weak point that the winding angle of the head changes greatly.

The tape traveling adjustment in the magnetic recording / reproducing apparatus having the rotary magnetic head requires the highest skill and time among various adjustments, and it is particularly difficult to adjust the fixed head portion (audio, control head portion). .

The present invention provides a mounting device for a fixed head that solves such problems.

(Means for Solving Problems) In order to solve the above problems, a fixed head mounting device of the present invention mounts a base member on a guide shaft erected on a chassis such that the base member can be vertically moved and adjusted. An adjustment plate is arranged horizontally on the upper surface so as to be movable only in a fixed linear direction, and a mounting bracket is mounted on the lower surface of the base member with the fixed head in a suspended state. Supported by the adjusting plate, and further, with the adjusting plate fixed to the base member, the inclination of the fixed head mounting bracket with respect to the adjusting plate in the front-rear direction and the left-right direction can be independently finely adjusted. It is characterized by.

(Operation) When the base member is moved in the vertical direction along the guide shaft that is erected on the chassis, the fixed head mounting brackets arranged on the base member move up and down together to adjust the height of the fixed head. If the adjustment plate provided on the base member is moved only in a fixed linear direction in the horizontal plane with the base member fixed to the guide shaft, the fixed head mounted on the adjustment plate can be mounted. The metal fittings move integrally in the horizontal direction, and the linear movement of the fixed head can be adjusted only by running the tape. Further, with the adjusting plate fixed to the base member, if the fixed head mounting bracket is tilted with respect to the adjusting plate in the front-back direction and the left-right direction, fine adjustment of the front-back and left-right tilt of the fixed head becomes possible. .

(Example) An example of the present invention will be described with reference to the drawings. (1) is a base member whose upper surface is formed as a smooth surface, and a vertical tube (2) is integrally attached to the center of one side portion thereof. In addition, a U-shaped notch (3) is opened in the center of the other side, and the vertical cylinder (2), notch (3) and chassis (4) are erected and fixed to the guide. The shafts (5) and (6) are inserted through the shafts (5) and (6), respectively, and are vertically movable along the guide shafts (5) and (6). Furthermore, a screw part (5a) is provided on the upper end of one guide shaft (5), and the screw part (5a) is raised by a washer (7) pressed against the upper end face of the vertical cylinder (2). The nut (8) for adjusting the height is screwed, and the lower end surface of the vertical tube (2) and the chassis (4) are screwed together.
A compression spring (10) for height adjustment is interposed between them. or,
Large-diameter holes (9a) (9b) (9c) (9d) are pierced between the upper and lower surfaces at the center of both sides and the center of the front and rear portions of the base member (1), and at the same time as one side front portion. Screw holes (11) on the other side rear part
(12) is provided, and a locking hole (13) is formed in the front portion of the other side.

Reference numerals (14) and (15) denote an adjusting plate and a fixed head mounting bracket arranged on the upper surface and the lower surface of the base member so as to sandwich the base member (1), and the adjusting plate (14) arranged on the upper surface of the base member (1). ) Has long holes (16) (17) long in the left-right direction, which are respectively formed in the front part of the one side and the rear part of the other side so as to match the screw holes (11) (12) of the base member (1). In addition, a long hole (18) for fine horizontal adjustment in the front-rear direction that is aligned with the locking hole (13) of the base member (1) is formed at an appropriate position on the upper surface of the front part. A screw insertion hole (19a) (1a) (1a) (1a) (1a) (1a) having a diameter corresponding to the large diameter holes (9a) (9b) (9c) (9d) of the base member and smaller than these large diameter holes.
9b) (19d) is bored and the lower end of the front central lower surface that is inserted into the front central large-diameter hole (9c) of the base member (1) has a lower end formed at a pointed end. 20) is projected.

The upper surface of the fixed head (audio control head, audio erase head) (21) (22) is integrally attached to the central portion of the lower surface of the mounting bracket (15). Screw holes (23a) (23b) that match the diameter holes (9a) (9b) are provided, and a support hole (24) that supports the tip end of the regulation pin (20) in a fitted state is provided at the center of the front part. There is.

(25) and (26) are adjusting plate fixing screws which are inserted into the long holes (16) and (17) and screwed into the screw holes (11) and (12) of the base member (1). The adjusting plate (14) is a base. It is fixed on the member (1). (27) is a small head screw insertion hole (19a) provided at the center of one side of the adjustment plate (14), and a large diameter hole (9a) of the base member (1) is inserted through the lower end of the adjustment plate (14) to attach a fixed head. A compression spring (28) is press-fitted between the lower surface of the head and the upper surface of the adjusting plate (14) with a horizontal tilt adjusting screw screwed into the screw hole (23a) of the metal fitting (15).

(29) is a small-diameter screw insertion hole (19a) provided in the center of the other side of the adjusting plate (14) to a large-diameter hole (9b) of the base member (1).
Is a horizontal tilt adjustment screw that is inserted into the screw hole (23b) of the fixed head mounting bracket (15), and holds the fixed head mounting bracket (15) together with the adjustment screw (27). It is what is supported in the state.

(30) is inserted through the large diameter hole (9d) of the base member (1) from the screw insertion hole (19b) provided in the rear center of the adjustment plate (14), and the lower end of the screw is inserted into the fixed head mounting bracket (15). A front and rear tilt adjusting screw fitted in a hole (31) in the rear center.

With this configuration, when the nut (8) screwed onto the upper end of the guide shaft (5) is screwed or unwound, the base member (1) moves along both guide shafts (5) and (6). The height of the fixed heads (21) and (22) that move vertically and the fixed head mounting bracket (15) disposed on the base member (1) also moves integrally and is mounted on the mounting bracket (15). You can make adjustments.

When adjusting the linear movement in the tape running direction, loosen the adjustment plate fixing screws (25) (26) a little and then adjust the adjustment plate (14).
Adjusting jig (not shown) in the long hole (18) in the front-back direction
And insert the tip into the locking hole (13) of the base member (1).
If the adjusting plate (14) is moved in the tape running direction while being locked with the fixed head mounting metal fitting (15), the fixed head mounting metal fitting (15) can be integrally moved to perform a desired adjustment. At this time, the screws (25) (26) (27) and the regulation pin (20) are inserted into the holes (9a) to (9d) having a diameter larger than those of the screws and pins, so the mounting required for adjustment The metal fittings (15) can be moved freely.

Next, when the left and right tilt adjustment screws (27) (29) are rotated,
The mounting bracket (15) can be slightly rotated in the left-right direction with respect to the adjusting plate (14) to adjust the left-right inclination of the fixed heads (21) (22). Further, when the screw (30) at the rear center of the adjusting plate (14) is rotated, the mounting bracket (15) is locked by the regulating pin (2).
(0) as a fulcrum and rotates in the front-back direction to the fixed head (21)
The tilt before and after (22) can be adjusted.

(Effect of the invention) As described above, according to the fixed head attachment device of the present invention, the attachment provided on the base member is moved by vertically moving the base member along the guide shaft erected on the chassis. The vertical movement of the fixed head attached to the metal fittings can be adjusted, and the adjustment plate mounted on the upper surface of the base member is horizontally movable only in a fixed linear direction. The head mounting bracket can be moved in the same direction to adjust the movement of the fixed head in the tape running direction.Furthermore, the tilt of the fixed head mounting bracket with respect to the adjustment plate in the front-rear direction and the left-right direction can be finely adjusted independently. It is possible.

Also, since the mounting bracket is arranged above the fixed head,
The lower side of the fixed head can be effectively used by disposing other mechanisms.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is an exploded perspective view, Fig. 2 is a plan view of an assembled state, and Fig. 3 is Fig. 2A.
Fig. 4 is a vertical sectional front view taken along line -A, and Fig. 4 is a vertical sectional side view taken along line BB in Fig. 2. (1) …… Base member, (4) …… Chassis, (5)
(6) …… Guide shaft, (8) …… Nut, (9a) to (9
b) ... Large diameter hole, (14) ... Adjustment plate, (15) ... Fixed head mounting bracket, (19a) (19b) (19d) ... Screw insertion hole, (20) ... Regulation pin, ( 21) (22) …… Fixed head, (25) (26) …… Adjustment plate fixing screw, (27) (29)…
… Left and right tilt adjustment screws, (30) …… Front and rear tilt invitation screws.

Claims (1)

[Claims] 1. A base member is attached to a guide shaft erected on a chassis so as to be vertically movable, and an adjusting plate is arranged on the upper surface of the base member so as to be horizontally movable only in a fixed straight line direction and the lower surface of the base member. On the side, a mounting bracket mounted with the fixed head in a vertical state is disposed, the mounting bracket is supported by the adjusting plate via a base member, and further, the adjusting plate is fixed to the base member. A fixed head mounting device, characterized in that the fixed head mounting bracket is configured to be capable of finely adjusting the inclination of the fixed head mounting bracket with respect to the adjustment plate in the front-rear direction and the left-right direction.