JPS62259253A - Tape traveling height adjusting mechanism in magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve workability and to reduce the price of a device by making a position adjusting member of plastic, and engaging the inner diameter side of the member with a self-tap part of a shaft by the rotation of the member itself. CONSTITUTION:A tape guide 4a is engaged with a shaft 2A through a spring body 3, the inner diameter side of the position adjusting member 6 is engaged and screwed with/into the self-tap part 2a and a tape guide 4a is pressed from the upper part by the position adjusting member 6. Consequently, the height of the tape guide 4a is adjusted. Since the position adjusting member 6 made of plastic is engaged with the self-tap part 2a of the shaft 2A, the coating of adhesives or the like can be omitted, the workability can be improved and the price can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is directed to a magnetic recording/reproducing device having a tape running height of 3II'.
41! The present invention relates to a tape running height adjustment v1 mechanism for a magnetic recording/reproducing device, which is particularly aimed at improving workability and reducing costs.

[Conventional technology]

First, an overview of a magnetic recording/reproducing apparatus and a conventional tape running height adjustment mechanism provided in this magnetic recording/reproducing apparatus will be explained.

FIG. 2 is a schematic plan view showing an example of a magnetic recording/reproducing device;
FIG. 3 is a side sectional view showing details of the tape running height adjusting mechanism in FIG. 2.

In FIG. 2, reference numeral 7 denotes a tape cassette installed in a magnetic recording/reproducing apparatus. 1 During normal reproduction, a magnetic tape 10 is pulled out from a tape force set 7 by loading posts 8, 9.

Guide boss 11. Tension boss 12. A tape guide 4σ of a tape running height adjustment mechanism 4 (details will be described later) on the tape exit side, a full width erasing head 13. The audio/CTL head 16 is wound around the cylinder 15 at a predetermined angle while attached to the impedance roller 14 . The roller 20 of the tape cassette 7 is driven between the pinch roller 18 attached to the tape guide 412 of the tape running height adjustment mechanism 1a 4 on the tape entry side and pivotally supported by the pinch roller arm 17 and the capstan 19. The tape cassette 7 is wound onto a take-up reel hub (not shown) of the tape cassette 7, which is rotated clockwise by a take-up reel 22 attached to the tape cassette 7 and rotated by an idler arm 21.

The details of the tape running height adjusting mechanism will be explained using FIG. 3. This tape running height adjustment mechanism 4 has the same configuration on both the tape entry side and the tape exit side.

In FIG. 3, reference numeral 1 denotes a chassis of a magnetic recording/reproducing apparatus, and a tape running height adjustment mechanism is attached to this chassis 1. That is, the tape guide 4a is fitted onto the shaft 2, which is implanted on the chassis 1 and has a threaded portion formed on the tip side, with the spring body 3 interposed therebetween.
is tightened by a nut 5, which is a position adjustment member that is screwed into the threaded portion. The magnetic tape 10 is adapted to slide while adhering to the outer peripheral surface of the tape guide 4a.

The height of the tape guide 4a is adjusted by rotating the nut 5 using a box wrench or the like against the force of the spring body 3, thereby moving the tape guide 4a up and down. After this adjustment work, apply adhesive to the nut 5 and
The rotation was stopped.

Separately, instead of the nut 5, a nylon nut integrally formed by overlapping nylon and a nut (the nylon has no internal thread) is used, and this nylon nut is attached to the shirt 1 2. There is also a method in which the work of applying adhesive is eliminated by screwing the nylon into the threaded part of the threaded part.

A related example of this type of tape running height adjustment mechanism is disclosed in Japanese Utility Model Application Publication No. 59-82361, for example.

[Problem that the invention seeks to solve]

As mentioned above, the conventional tape running height adjustment machine “
The structure has poor workability because it is necessary to apply adhesive to the nut 5 after adjusting the height of the tape guide 4a, and in the case of using a nylon nut, there is a problem that the nylon nut is expensive. Ta.

The object of the present invention is to improve the above-mentioned problems of the prior art, and to provide a tape running height adjustment mechanism for a magnetic recording/reproducing device that is easy to work with and is inexpensive.

[Means for solving problems]

In order to achieve the above object, the tape running height adjusting mechanism of the magnetic recording/reproducing apparatus according to the present invention is fitted into a shaft installed on a chassis with a spring body interposed therebetween, and is fitted from the tip side of the shaft. The running height of the magnetic tape is adjusted by a tape guide that is stopped by a position adjustment member.

In the tape running height adjustment mechanism of a magnetic recording and reproducing device,
The shaft is provided with a self-tap portion on its tip side, and the position adjustment member is a plastic position adjustment member whose inner diameter side can bite into the self-tap portion by rotation of the shaft itself. It is something.

[For production]

Since the position adjusting member is made of plastic, the inner diameter side can be bitten into the self-tapping portion of the shaft by the rotation of the position adjusting member, which improves workability and reduces cost.

〔Example〕

The present invention will be explained below by way of examples.

FIG. 1 is a side sectional view showing details of a tape running height adjusting mechanism according to an embodiment of the present invention.

In FIG. 1, the same parts as in FIG. 3 are denoted by the same numbers. 2A is a shaft provided with a self-tap portion 2a on its tip side. This self-tapping part 2a is formed, for example, in the same manner as in the formation of a normal threaded part.
Formed by header processing. 6 is made of plastic and is capable of biting the inner diameter side (the inner diameter dimension is almost equal to the outer diameter dimension of the shaft 2A, and no female thread is formed) into the self-tapping part 212 by its own rotation. 'P1 member (external shape is hexagonal like a normal nut 1). Suitable examples of the plastic include polyacetal resin (POM) and polyamide resin (PA).

The assembly method is to fit the tape guide 4a onto the shaft 2A with the strip body 3 in between, and while rotating the position adjustment member 6 with a box wrench, bite the inner diameter side of the position adjustment member 6 into the self-tap portion 2a. and screw it onto the self-tap portion 2a, and then press the tape guide 4a from above using the member 6 for 1t3iIa. tape guide 4α
The height adjustment method is the same as the conventional method described above. However, since the plastic bites into the self-tap portion 2a, there is no need to prevent the 1-position adjustment member 6 from rotating after the height adjustment.

The operation of the tape running height adjusting mechanism 4A configured as described above is completely the same as the operation of the conventional tape running height adjusting mechanism 4 described above, and therefore the explanation thereof will be omitted.

According to the embodiment described above, since the inner diameter side of the position adjustment member 6 bites into the self-tapping portion 2I2 of the shaft 2A, there is no need to apply adhesive or the like, resulting in good workability. Since it is not necessary to use such materials, it has the effect of being inexpensive.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a tape running height adjusting mechanism for a magnetic recording/reproducing device that is easy to work with and is inexpensive.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing details of a tape running height adjustment mechanism according to an embodiment of the present invention, and FIG. FIG. 3 is a schematic plan view showing an example of a magnetic recording/reproducing device.
FIG. 3 is a side sectional view showing details of the tape running height adjustment mechanism in FIG. 2;

Claims (1)

[Claims] 1. The running height of the magnetic tape is adjusted by a tape guide that is fitted onto a shaft installed on the chassis with a spring body in between, and is stopped by a position adjustment member from the tip side of the shaft. In the tape running height adjustment mechanism of a magnetic recording/reproducing device, the shaft is provided with a self-tap portion on the tip side, and the position adjustment member is rotated by itself so that the inner diameter side is attached to the self-tap portion. A tape running height adjustment mechanism for a magnetic recording/reproducing device, characterized in that it uses a plastic position adjustment member that can be bit into.