JPS63311650A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce a number of parts by forming a self-tapping part on an apex part of a shaft embedded on a substrate of the titled magnetic recording and reproducing device and fitting an elastic material made of resin capable of being light pressingly inserted by the shaft at one end of a tape guide, and also an elastic member made of resin capable of being screwed in by the self- tapping part at the other end by force-feeding, etc. CONSTITUTION:On the assemblage of a tape traveling height adjusting mechanism 3, the tape guide 3a is fitted to the shaft 2, while the elastic member 3b to the shaft on the apex side and the elastic member 3c to the shaft on the root side, and then the elastic member 3b made of resin is rotated. Therefore, the resin of the elastic member 3b bites into the self-tapping part 2a of the shaft, so that the elastic member 3b made of resin is screw fitted with the shaft, and consequently the need of adhesion for antirotation is eliminated. Then, since the elastic member 3c made of resin is light pressingly fitted by the shaft, so that the elastic member 3c is engaged under the state of fusion with the shaft, which is correspond to a spring body, and consequently there is no need of moving in backlash of the tape guide. By this method, the workability is improved and also the number of parts is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing apparatus equipped with an improved magnetic tape running height adjustment mechanism.

[Conventional technology]

In magnetic recording and reproducing devices such as VTRs, the magnetic tape is correctly wound around a predetermined part of the cylinder of a rotating magnetic head.
1. The running height is adjusted and set so that it can run.

FIG. 2 is a block diagram showing the outline of a magnetic recording and reproducing device that performs magnetic recording and reproducing using a magnetic tape cassette, and 7 is a magnetic tape cassette (hereinafter referred to as a tape cassette mounted in a nest) installed in the magnetic recording and reproducing device. During normal playback, the loading position is 8) from the tape cassette 7.
．． The magnetic tape (hereinafter simply referred to as tape) 10 pulled out by 9 is moved to a guide post 11, a tension post 12, a tape guide 3a of a tape running height adjustment mechanism 3 on the tape exit side, a full width erasing head 13, and an impedance roller 14. While attaching it to the tape guide 3a of the tape running height adjustment mechanism 3 on the tape input side, wind it around the cylinder 15 at a predetermined angle. After being pinched and driven by the supported pinch roller 18 and capstan 19, it is attached to the row 220 of the tape cassette 7, and the idler arm 2
The tape cassette 7 is rotated clockwise by a take-up reel 22 rotationally driven by the tape cassette 7, and is wound onto a take-up reel hub (not shown).

FIG. 3 is a side sectional view illustrating details of the tape running height adjusting mechanism 5.
Both the tape input side and tape output side have the same configuration.

In FIG. 3, tape running height adjusting mechanisms 3 are scattered on a substrate 1 of a magnetic recording/reproducing apparatus.

That is, a tape guide 5a is fitted onto a shaft 2 which is implanted on a substrate 1 and has a threaded portion at its tip, with the spring 4 sandwiched therebetween, and the tape guide 3a is screwed into the threaded portion. The nut 5 is a tightening mechanism. The magnetic tape 10 slides and runs while adhering to the outer peripheral surface of the tape guide 6a.

The height of the tape guide 3a is adjusted by resisting the force of the spring body 4.
By rotating the nut 5, the tape guide 3a is moved up and down. After this adjustment work, Nat5
Apply adhesive to the nut 5 to prevent it from turning.

Furthermore, in the above adjustment mechanism, a nut in which nylon is embedded is used instead of the nut, and this is screwed onto the threaded part of the shaft so that the nylon bites into the threaded part. There is also a method that eliminates the need for coating.

The related tape running height adjusting mechanism K may be, for example, the one described in Japanese Utility Model Application Publication No. 59-82561.

[Problem that the invention seeks to solve]

In the above-mentioned prior art, after adjusting the height of the tape guide 3a, it is necessary to apply adhesive to the nut 5 so that its position does not move, which poses a problem in workability. In addition, even in adjustment mechanisms that eliminate the need for adhesive work by using a member with nylon embedded in the nut or an elastic resin member, a spring body is required to correct the looseness of the tape guide, which is an obstacle to reducing the number of parts. It had become.

The present invention solves the above problems, improves workability, and
It is an object of the present invention to provide a magnetic recording and reproducing device that can reduce the number of parts by removing a spring from an adjustment mechanism.

[Means for solving problems]

The above purpose is to form a self-tapping part at the tip of the shaft implanted on the substrate of the magnetic recording/reproducing device, and to attach a resin elastic material that can be lightly press-fitted into the shaft at one end of the tape guide.
This is achieved by having a structure in which a resin elastic member that can be screwed into the self-tapping portion is fitted to the other end by press-fitting or the like.

[Effect]

The position of the tape guide is adjusted, positioned, and fixed by fitting the tape guide onto the shaft from the light press-fitting part first, and by biting the threaded part at the other end into the self-tapping part of the shaft.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the tape running height adjustment mechanism of the magnetic recording/reproducing apparatus according to the present invention, in which 1 is a substrate, and 2 is a shaft having a self-tapping portion 2a at its tip. . Reference numeral 3a designates a tape guide, one end of which has a resin elastic member 3b having an appropriate inner diameter that can be bit into the self-tapping portion 28, and a shaft fitted to the other end by light press-fitting.

In assembling this tape running height adjustment mechanism 3, the tape guide 3a is fitted onto the shaft 2 so that the elastic member 3b is on the tip end side of the shaft and the elastic member 6C is on the base side of the shaft, and the resin elastic member 6b is rotated. As a result, the resin of the elastic member 3b bites into the self-tapping portion 2a of the shaft 2, and the resin elastic member 6b is screwed onto the shaft.
No adhesive is required to prevent rotation. In addition, since the resin elastic member 6c is lightly press-fitted into the shaft, the elastic member 3c and the shaft engage in a fused track, and as in the prior art, a tape guide is used as a spring body. There is no need to correct the looseness.

〔Effect of the invention〕

As explained above, the present invention eliminates the need for gluing work after adjusting the tape guide position ii, and also eliminates the need for a spring body for rattling the tape guide, improving work efficiency and reducing the number of parts. As a result, it is possible to provide a magnetic recording and reproducing apparatus having a highly functional magnetic tape running height adjustment mechanism.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of a tape running height adjustment mechanism in a magnetic recording/reproducing apparatus according to the present invention, FIG. 2 is a configuration diagram showing an outline of the magnetic recording/reproducing apparatus, and FIG. FIG. 3 is a side sectional view showing details of the tape running height adjustment mechanism in FIG. 1... Substrate 2... Shaft 2a... Self-tapping portion 5... Tape running height adjustment mechanism 6a... Tape guide 3b... Resin elastic member (screwed side) 3c... Resin Made of elastic member (light press-fit side) 10...Magnetic tape. ,21,. Agent: Patent attorney Katsuo Ogawa: I.

Claims (1)

[Claims] 1. A magnetic tape wound in a cassette is pulled out to a predetermined running path by a tape guide, wound around a rotating cylinder equipped with a magnetic head, and implanted on a substrate in a magnetic recording and reproducing device that performs recording and reproducing. The tape running height adjustment mechanism is equipped with a tape running height adjustment mechanism that adjusts the running height of the magnetic tape by means of a tape guide fitted into the shaft, and the tape running height adjustment mechanism has a self-tapping section provided at the tip of the shaft. , an elastic member made of resin or the like is fixed to both ends of the tape guide by press-fitting or the like, one end of the tape guide is engaged with the elastic member in a fused state, and the other end is screwed into the self-tapping part. What is claimed is: 1. A magnetic recording and reproducing apparatus characterized in that the tape is configured to adjust the running height and position the tape.