JPS5814472Y2 - Tape recorder head mount - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of the base for mounting the head of a tape recorder.

The recording, playback and erasing heads of a tape recorder are
Conventionally, it has been fixedly mounted on a support member made of a brass boss or the like attached to the chassis.

However, in recent years, in order to reduce costs or improve the workability of processing work, the head mounting base has been made by integrally molding materials such as plastic, and the head mounting base made by integral molding has become a base. A method of fixing the chassis of the tape recorder, that is, the receiver, to a plate began to be used.

Regarding the attachment of each head of a tape recorder, the integrally molded plastic head attachment as described above is not suitable for tape recorders that use a stand, if the tape recorder is used for a long time. There was a problem: it caused a problem.

That is, as shown in Fig. 2, for the head mounting, the plate 6 on which the stand is fixed is made of metal, and on the other hand, for the head mounting, the stand is made of integrally molded plastic. In this case, since metal and plastic have different coefficients of thermal expansion, the amount of thermal expansion that changes depending on changes in temperature is different between the plate for the support and the base for mounting the head. This installation may cause warping between the base plate 7 of the base and the support plate 6 due to excessive force applied to the base.

This warpage causes the mounting position of the head to fluctuate, thereby causing a misalignment between the tracks on the tape surface and the head.

For this reason, head mounting has involved the problem that warping between the base and the plate makes the recording and playback button operations of the tape recorder inaccurate and reduces the reliability of the tape recorder.

In the present invention, a gap such as a notch or an opening is created in the bottom plate of the stand to mount the head, and the bottom plate on both sides of this gap is structured to be flexible and molded integrally with the bottom plate. The head mounting is capable of absorbing the distortion due to the above-mentioned difference in thermal expansion by connecting them to each other by the arm members, which are shaped like the above-mentioned arms. It is said that

FIG. 1 is a plan view schematically showing a bottom plate 7 of a head mount according to an embodiment of the present invention.

The head mounting base is made of plastic material and has a button, and support bosses 8 and 9 have holes for mounting the recording and playback heads, and support bosses 10 have holes for passing screws for mounting the erasing head. and 11 are integrally molded and provided at a predetermined position.

Screw members are inserted into the holes of these support bosses to fix the head, so that the head can be positioned at a constant height.

For mounting the head, the base is firmly attached to the plate 6, which constitutes the chassis of the tape recorder, etc., using screws.

This installation can be done by inserting a screw into a hole provided through the support boss and engaging the screw with a screw hole provided in the receiving plate. It shows the condition.

Among these, the holes in the support bosses 8, 10, and 11 are through holes through which screws can be easily passed. The support boss 8 is provided so that the through hole of the support boss and the screw hole of the support plate 6 coincide and communicate along the same central axis when the base is placed on the plate. ，
The screws passed through the through holes 10 and 11 and engaged with the respective threaded holes in the plate 6 fix the head to the mounting base, and also allow the mounting base to be mounted on the plate 6.

However, regarding the support boss 9, the relationship between the through hole and the screw hole described above is reversed.

That is, the hole in the support boss 9 is threaded, and the hole drilled in the plate 6 does not need to be threaded in order to communicate with the screw hole in the support boss 9. All you need to do is to be able to fit the tip part into the receiver.

The reason for this is that, as mentioned above, the support boss 9 is provided together with the support boss 8 to support the recording/playback head. This is because it is necessary to adjust the height of the head using an adjustment screw screwed into a screw hole in the support boss 9 to enable tracking adjustment between the tape and the recording/playback head.

In order to meet this requirement, the screws screwed into the screw holes of the support bosses 9 do not engage with the plate 6, and the head attachment made from plastic is screwed into the support bosses 9 of the stand.

As a result of adopting such a configuration, when mounting the head, the base is inserted into the respective through holes of the support bosses 8, 10, and 11, and the receiver is firmly connected to the plate 6 by screws that engage with the screw holes in the plate 6. In addition, each of the above support bosses 8, 10 and 1
1, the above-mentioned warping is likely to occur due to the difference in the amount of thermal expansion caused by the difference in the coefficient of thermal expansion between the plastic material and the metal material.

This warping phenomenon greatly affects the contact of the head with the tape track, resulting in a deterioration in the quality of reproduced sound.

In particular, the warpage that occurs between the support bosses 8 and 10 causes fluctuations in the height or inclination of the recording/reproducing head, which tends to be a direct cause of the above-mentioned deterioration in sound quality.

The head mounting shown in FIG.
For mounting the head between the base and the support boss 10, cutouts 12 and 13 are provided in the bottom plate portion of the base from both sides toward the opposite sides.

Moreover, an opening 5 of an appropriate shape is formed inside the bottom plate further than these notches, and the opening 5 forms one gap part with the two above-mentioned notches, and allows the bottom plate to be opened in the first place.
There are two areas, area 1 and second area 2! It is divided.

By making the notches 12 and 13 and the opening 5 at appropriate positions on the bottom plate and having a suitable shape, a constant shape is created between the first area 1 and the second area 2 of the bottom plate. arm 3
and 4 are made.

These arms 3 and 4 are integrally formed with the bottom plate, and have a highly flexible structure that connects the first section 1 and the second section 2 so as not to separate them from each other.

Since the arms 3 and 4 have a flexible structure, the bottom plate of the pedestal for mounting the head is protected against external forces perpendicular to the direction in which the notches 12 and 13 extend, i.e. from the front or rear end of the bottom plate. The strain caused by the acting external force can be absorbed by buttoning the arm 3 and 40 portions formed in the gap between the first section and the second section.

This distortion is often caused by a difference in the amount of thermal expansion caused by the difference in coefficient of thermal expansion between the base and the plate of the tape recorder head mounting plate, as described above.

For head mounting, arms 3 and 4 are integrally molded on the bottom plate of the stand, so the head mounting made of plastic material will reduce the amount of thermal expansion between the bottom plate 7 of the stand and the metal support plate 6. The strain caused by the difference is absorbed by the arms 3 and 4,
The bottom plate 7 or the plate 6 will not warp.

FIG. 3 is a diagram showing another embodiment of the present invention.

In this embodiment, deep cuts 12' and 13' are formed between the support bosses 8 and 10 on the bottom plate of the table from appropriate positions on both sides of the bottom plate toward the opposite sides of the table. to form a gap portion and substantially divide the bottom plate into two regions, a first region 1 and a second region 2.

Further, between the two notches, an elongated and highly flexible arm 14 is formed integrally with the bottom plate.
The area 1 and the second area 2 are connected so as not to be separated from each other.

For this reason, when mounting the head, the bottom plate of the stand is subject to distortion caused by an external force perpendicular to the direction in which the notches 12' and 13' extend, that is, an external force acting from the front or rear end of the bottom plate. It can be absorbed in the part of the arm 14 formed between the two areas.

In the embodiment shown in FIG. 3, unlike the embodiment shown in FIG. 1, the gap portion of the bottom plate and the arm 14 are formed only by cuts 12' and 13'.

Thus, in order to achieve the object of the present invention, various modifications can be made to the structure of the gap portion provided in the bottom plate of the base for mounting the head.

As explained above, according to the present invention, the head is attached by providing a notch or opening at an appropriate position on the bottom plate of the stand to create a gap, and furthermore, the structure is flexible and is formed integrally with the bottom plate. Due to the relatively simple structure of providing arms, the head mount made of plastic material can absorb warping that may occur due to the difference in thermal expansion between the base and the plate made of metal material. The table was realized.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a head mounting base according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line A-A' in FIG. 1, and shows a state in which the head is attached to the plate and the stand is fixed. FIG. 3 is a plan view of a head mounting base in another embodiment of the present invention. Explanation of symbols, 1-: first area, 2: second area, 3.
4: Arm, 5: Opening, 6: Holder is plate, 7: Bottom plate (head mounting is on stand), 8, 9, 10, 11: Support boss, 12, 13
, 12', 13': cut, 14: arm.

Claims (1)

[Claims for Utility Model Registration] A receiver consisting of a support boss for fixing the recording, playback head and erasing head of a tape recorder and a bottom plate for holding the support boss in a predetermined position are integrally molded. The head fixed on the plate is mounted on the base, and the bottom plate is provided with at least one notch extending in opposite directions from each side of the bottom plate to the opposite side. The receiver is provided with a gap section that substantially divides the receiver into a first section and a second section fixed to the plate, and the gap section further includes the first section and the second section of the bottom plate. A head mounting stand for a tape recorder, comprising an arm member integrally formed with a bottom plate and having a flexible structure for connection.