JP3058505U - Mounting structure of audio control head in magnetic recording / reproducing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] For a base member fixed to a chassis,
When the support plate to which the audio control head is fixed is elastically received by a compression coil spring and mounted so that the level can be adjusted, the X value does not shift even when a lateral shock is applied, and the mounting structure can reduce the number of parts I will provide a. SOLUTION: A support plate to which an audio control head is fixed is interposed between a base member mounted on a chassis and a compression coil spring having a relatively large wire diameter and a high spring force in an inclined state. , And adjusted with the adjustment screw.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an improvement in a mounting structure of an audio control head provided in a tape running path from a rotary head cylinder to a capstan in a magnetic recording / reproducing apparatus.

[0002]

[Prior art]

 In the conventional mounting structure, as shown in FIG. 5, an audio control head 18 is attached to a base member 17 which is fixed to a chassis so that the horizontal mounting state can be finely adjusted by mounting screws passing through a long hole 16. When attaching the fixed support plate 19 to the base member 17, the support plate 19 is elastically received and attached by three compression coil springs 21 inserted through three adjustment screws 20, and the adjustment screw 20 is tightened or loosened. The level of the support plate 19 can be adjusted, and the inclination, height and azimuth of the audio control head 18 in the axial direction can be adjusted.

[0003]

[Problems to be solved by the invention]

 However, the three compression coil springs 21 are vertically mounted between the base member 17 and the support plate 19, and the spring force acts only in the up and down direction. There has been a drawback in that a lateral displacement has occurred and the effect of restoring the lateral displacement to the compression coil spring 21 cannot be expected. That is, it is desirable that the distance (X value) on the tape running path from the rotary head cylinder to the audio control head 18 is always kept constant. However, if the impact causes the lateral displacement, the X value shifts. was there. The use of three compression coil springs also leads to an increase in the number of parts.

[0004] Therefore, the object of the present invention is to elastically receive the support plate to which the audio control head is fixed by a single compression coil spring, reduce the number of parts, and apply a shock in the lateral direction. It is an object of the present invention to provide an audio control head mounting structure that does not cause the X value to shift.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, the mounting member is provided between the base member and the base member, which is fixed to the chassis so that the mounting state in the horizontal direction can be finely adjusted by a mounting screw passing through a long hole. In the audio control head mounting structure in which the audio control head is fixedly mounted on a support plate that is elastically received by the compressed coil spring and that is attached to the base member with an adjustment screw so that the level can be adjusted, compared to the above compression coil spring It is characterized in that one compression coil spring having a large target wire diameter and strong spring force is used, and the compression coil spring is mounted in an inclined state between the base member and the support plate.

In order to mount the compression coil spring in an inclined state, the compression coil spring is mounted between the base member and the support plate by using a compression coil spring that is inclined in a state where the axis of the compression coil spring is non-vertical, or the spring seat of the base member and the support plate are mounted on the base member. The spring seat may be shifted in the horizontal direction, and the compression coil spring may be mounted in an inclined state between the spring seats.

As described above, if a single compression coil spring having a relatively large wire diameter and a high spring force is used and is mounted in an inclined state between the base member and the support plate, it is possible to perform the returning operation in the vertical direction, Even if a lateral impact is applied, even if a lateral displacement occurs due to the repulsive force of the compression coil spring that is mounted in an inclined state in advance, a return force acts, and the intended set position The present invention can provide a mounting structure that can be returned to the original position and does not cause the X value to shift.

[0008]

[Embodiment of the invention]

 1 is an exploded perspective view showing a mounting structure according to the present invention, and FIG. 2 is a front view showing a completed mounting state, in which mounting screws are passed through a slot 1a on a chassis. The base member 1 is fixed so that its horizontal mounting state can be finely adjusted. The center part has a substantially U-shaped cross section, a spring seat 2 is protruded from the bottom part, and the free end of the side wall is horizontal. The mounting pieces 4 and 5 of the support plate 3 are formed by being bent in the direction. The mounting piece 4 has screw holes 7a and 7b for screwing the adjusting screws 6a and 6b, and the mounting piece 5 has a screw hole 7c for screwing the adjusting screw 6c.

A head assembly including an audio control head 8 is fixed on the support plate 3, and through holes 9 a and 9 b corresponding to the screw holes 7 a and 7 b of the mounting piece 4, and a screw of the mounting piece 5. A through hole 9c corresponding to the hole 7c is formed, and a spring seat on the support plate 3 side is constituted by a bent piece 10 protruding from a side edge portion.

The compression coil spring 11 uses a single compression coil spring having a relatively large wire diameter and a strong spring force. The compression coil spring 11 is installed with its lower end fitted to the outer periphery of the spring seat 2 of the base member 1 and adjusted. When the screws 6a, 6b, and 6c are screwed into the screw holes 7a, 7b, and 7c through the through holes 9a, 9b, and 9c, and the support plate 3 is mounted on the mounting piece 5, as shown in FIG. The upper part is pushed by the bent piece 10 constituting the spring seat of the above, and the spring seat is mounted in an inclined state.

FIG. 4 is a schematic view showing an attached state in a tape running path. The magnetic tape 13 wound around the rotary head cylinder 12 at a predetermined angle is guided by the gad roller 14 and the guide post 15 to move the audio control head 8. This shows a state in which the vehicle runs while sliding.

When the adjusting screws 6a, 6b, 6c are tightened or loosened in such a mounting state, the level of the support plate 3 elastically received by the compression coil spring 11 can be adjusted with respect to the base member 1. Yes, the attitude of the audio control head 8 can be finely adjusted. Specifically, height adjustment is performed by the adjustment screw 6a, azimuth adjustment is performed by the adjustment screw 6b, and adjustment of the inclination in the axial direction is performed by the adjustment screw 6c.

Since the compression coil spring 11 having a relatively large wire diameter and a strong spring force is used and is mounted between the support plate 3 and the base member 1 in an inclined state, it is possible to perform not only a vertical return operation but also a horizontal operation. The spring exerts a restoring force due to the repulsive force, so that even if a lateral impact is applied, it can be returned to the desired set position, and the X value, that is, from the rotating head cylinder to the audio control head 8. There is no possibility that the distance on the tape running path up to this point will shift.

The mounting of the compression coil spring 11 in an inclined state between the base member 1 and the support plate 3 is not limited to the above embodiment, and the spring seat similar to the spring seat 2 on the base member 1 may be displaced in the horizontal direction. The support plate 3 is provided with a compression coil spring between both spring seats to provide an inclined state, or the compression coil spring itself, which has a non-vertical axis and is inclined. Is also conceivable.

[0015]

[Effect of the invention]

 As described in detail above, according to the audio control head mounting structure of the present invention, the supporting plate is elastically received by a single compression coil spring having a relatively large wire diameter and a strong spring force. Since the compression coil spring is mounted in an inclined state between the member and the support plate, the resilience of the inclined spring causes a restoring force to act even when a lateral impact is applied, returning the spring to the desired set position. As a result, it was possible to provide a mounting structure in which the X value did not shift.

Also, since one compression coil spring is used, there is an advantage that the number of parts can be reduced as compared with the conventional mounting structure.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an audio control head mounting structure according to the present invention;

FIG. 2 is a front view showing the attachment completed state;

FIG. 3 is a cross-sectional view showing a mounting state of a compression coil spring.

FIG. 4 is a schematic diagram showing an attached state in a tape running path;

FIG. 5 is a perspective view showing a conventional mounting structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base member 1a ... Long hole 2 ... Spring seat 3 ...
Supporting plates 4, 5: mounting pieces 6a, 6b, 6c: adjusting screws 7a, 7b, 7c: screw holes 8: audio control heads 9a, 9b, 9c: through holes 10: bent pieces 11: compression coil springs

Claims (3)

[Utility model registration claims] 1. A base member fixed in a horizontally adjustable manner with mounting screws passing through a long hole on a chassis, and a compression coil spring interposed between the base member and a compression coil spring elastically received. In the audio control head mounting structure in which the audio control head is fixed on a support plate which is mounted on the base member with an adjusting screw so that the level can be adjusted, the compression coil spring has a relatively large wire diameter and a strong spring force. An audio control head mounting structure in a magnetic recording / reproducing apparatus using a compression coil spring and mounting the compression coil spring in an inclined state between a base member and a support plate. 2. The mounting structure of an audio control head in a magnetic recording / reproducing apparatus according to claim 1, wherein the compression coil spring attached between the base member and the support plate is a compression coil spring whose axis is inclined in a non-perpendicular state. 3. The audio control in the magnetic recording / reproducing apparatus according to claim 1, wherein the spring seat of the base member and the spring seat of the support plate are shifted horizontally, and the compression coil spring is attached in an inclined state between the two spring seats. Head mounting structure.