JPH04214253A - Tape guide holding mechanism - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of the height of a guide post and to miniaturize an entire mechanism. CONSTITUTION:A male screw 22a is cut on a shaft 22 attached to a tape guide 20 for guiding a tape. Meanwhile, a female screw 24a corresponding to the screw 22a is cut in a base 24 and a slot 25 is provided at a part where the screw 24a is formed to provide flexibility in a screw diameter direction.

Description

[Detailed description of the invention]

0001

TECHNICAL FIELD The present invention relates to tape guide holding mechanisms, and more specifically to video tape recorders (
The present invention relates to a mechanism for holding a tape guide of a magnetic tape used in a VTR (VTR) or a digital audio tape recorder (DAT).

0002

2. Description of the Related Art In the above-mentioned VTR and DAT, a magnetic tape is taken out from a tape cassette and wound around a rotating drum for recording or reproduction. A number of tape guides are provided for winding the magnetic tape removed from the tape cassette around the rotating drum at a predetermined height.

FIG. 6 shows a cross-sectional view of a conventional tape guide. 10 is a tape guide rotatably attached to a shaft 12, and the shaft 12 also penetrates into the base 14. The base 14 is fixed to the chassis 16. A screw hole is formed in the side surface of the base 14 at an intermediate position in the height direction, and a machine screw 18 is screwed into the hole, thereby fixing the shaft 12 to the base 14. In this manner, tape guide 10 is rotatably attached to chassis 16.

0004

SUMMARY OF THE INVENTION The above configuration has the following problems. That is, first, during manufacturing and assembly, when tightening the machine screws 18 for controlling loosening, it is necessary to secure a space for a tightening tool, which makes downsizing difficult. Second, the tape guide 10 is inclined in the direction in which the machine screw 18 is installed. Third, it becomes difficult to downsize the tape in the height direction.

An object of the present invention is to provide a tape guide holding mechanism that solves these problems.

[0006]

[Means for Solving the Problems] The tape guide holding mechanism according to the present invention includes a shaft having a tape guide attached thereto that guides a tape member, which has a male thread cut thereon, and an immovable base member which has a female thread corresponding to the male thread. It is characterized in that the thread is cut and the part where the female thread is formed is flexible in the radial direction of the thread.

[0007]

[Operation] The above means eliminates the need for the machine screw 18 of the prior art, and therefore also eliminates the need for a space for the tightening tool, allowing the device to be miniaturized. Furthermore, the height of the tape guide can be easily adjusted and the number of parts can be reduced, so manufacturing costs can be reduced.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a central sectional view of an embodiment of the present invention.
FIG. 2 shows its side view. 20 is a tape guide rotatably attached to a shaft 22, and the shaft 22 also penetrates into the base 24. The base 24 is
A female screw 24a and a slot 25 are formed in the upper part, and the lower part 24b is fixed to the chassis 26. A front view of the base 24 is shown in FIG. The shaft 22 also has a male thread 22a cut therein at a portion facing the female thread 24a of the base 24, which is screwed into the female thread 24a. The height of the tape guide 20 can be adjusted by adjusting the degree of screwing of the male screw 22a and the female screw 24a. Further, by providing the slot 25, loosening of the male screw 22a can be suppressed, and the tape guide 20 can be maintained at a constant height.

The female screw 24a and the slot 25 are elastically tightened from the outside to further strengthen the engagement between the male screw 22a and the female screw 24a and prevent the tape guide 20 from moving upward or downward over time. You can do it like this. FIG. 4 shows a central sectional view of the modified embodiment. A groove is cut in the outer peripheral surface of the base 24, a C-shaped elastic ring 30 is fitted therein, and the female screw 24a and the slot 25 are tightened from the outside. FIG. 5 shows a plan view taken along line AA in FIG. 4.

The elastic ring 30 does not have to be C-shaped, but may be made of an annular or polygonal plate material molded into a cup shape, and its material may be rubber or plastic as long as it is highly elastic. good.

0012

As can be easily understood from the above description, according to the present invention, it is possible to provide a tape guiding and holding mechanism that is lower in size and therefore suitable for miniaturization. In addition, the number of parts is reduced and manufacturing is possible at a lower cost.

[Brief explanation of the drawing]

FIG. 1 is a central sectional view of an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1.

3 is a plan view of the base 24 of FIG. 1. FIG.

FIG. 4 is a central sectional view of a modified embodiment.

FIG. 5 is a plan view taken along line A-A in FIG. 4.

FIG. 6 is a central sectional view of a conventional example.

[Explanation of symbols]

10: Tape guide 12: Shaft 14: Base 16: Chassis 18: Machine screw 20: Tape guide 22: Shaft 24: Base
24a: Female thread 24b: Lower base 25: Slot 26: Chassis 30: Elastic ring

Claims (1)

[Claims] Claim 1: A male thread is cut in the shaft to which the tape guide for guiding the tape member is attached, a female thread corresponding to the male thread is cut in the immovable base member, and the part where the female thread is formed is inserted in the radial direction of the thread. A tape guide holding mechanism characterized by being flexible.