JPS62139164A - Magnetic tape guide member for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve accuracy after implantation by filling and solidifying an adhesive between a basic end part and an implantation hole. CONSTITUTION:A columnar magnetic tape guide member 40 is held by a positioning jig 44, and the basic end part of said member 40 is fitted in the implantation hole 42 of a guide base 41, thereby installing the columnar magnetic tape guide member 40 at the prescribed angle and position by the positioning jig 44. After an ultraviolet curing type UV adhesive 43 is packed in the clearance between the basic end part of the columnar magnetic tape guide member 40 and the implantation hole 42 with installed member 40, a ultraviolet projecting device projects ultraviolet rays to said adhesive 43 so as to cure. Since the assembly accuracy of the magnetic tape guide can be decided only by the positioning accuracy of the positioning jig irrespective of part accuracy, the assembly accuracy is improved, and the highly accurate processing of parts is made unnecessary, thereby producing the guide at a moderate cost.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an inclined guide, a vertical post, and other magnetic tape guides in magnetic tape guides of magnetic recording and reproducing devices such as video tape recorders and tape recorders.

(Prior Art) Conventional magnetic tape guides are installed by press-fitting, screwing, or tight-fitting using an adhesive. In the magnetic tape guides planted by these methods, the planting precision is determined by the precision of the magnetic tape guide member and the planting hole, so it is very difficult to ensure high precision.

In addition, when using a material that has a small coefficient of friction and excellent sliding characteristics with the magnetic tape guide, but is brittle (for example, a graphite-based solid lubricant made by hardening graphite with a binder) as the magnetic tape guide, It is difficult to plant such brittle materials using methods such as press-fitting.

Furthermore, it is difficult to erect a magnetic tape guide having an inclination with high accuracy by a method such as press-fitting.

(Purpose) The purpose of the present invention is to provide a magnetic tape guide that can improve the accuracy after planting by combining the magnetic tape guide member and the planting hole even if the machining accuracy of the magnetic tape guide member and planting hole is low. It is something to do.

(Structure) In the magnetic tape guide of the present invention, the base end of the columnar magnetic tape guide member is fitted into the planting hole having an inner diameter larger than the outer diameter of the base end. An adhesive is filled between the hole and the planting hole and hardened.

Examples will be specifically described below.

FIG. 3 shows a schematic diagram of a tape running system of a typical video tape recorder.

A pair of tape guide mechanisms 168 and 16 are provided as tape guide mechanisms for pulling out the tape 2 from the cassette and pressing it against the cylinder drum 8. One tape guide mechanism 16a includes a vertical inlet guide 10a and an inclined inlet guide 9a, and the other tape guide mechanism 16 includes an inclined outlet guide 9 and a vertical outlet guide 10, so that both tape The guide mechanisms 16a, 16 are guide holes 17a of the guide plate 18, respectively.

17 and moves in the direction of the arrow, and is fixed at a loading end position on the side of the cylinder drum 8 and an unloading end position on the side of the handles 1 and 15. ■ is a supply reel, 15 is a take-up reel, 3 is a pack tension guide, 4 is a full-width erasing head, 5 is an impedance roller, 11 is an audio erasing head, 12 is an audio
Control head 13 is a capstan, 14 is a pinch roller, 30 is a head that rotates together with the cylinder drum 8, and 31 to 34 are guides.

The tape guide mechanisms 16a and 16 hook and pull out the tape 2 stored in the cassette, are guided through guide holes 17a and 17, respectively, and are fixed at the loading end position as shown in the figure to form a tape path. This operation is a loading operation. Conversely, from the tape path state shown in the figure, the tape guide mechanisms 16a and 16 are guided by the guide holes 17a and 17, respectively, and fixed at the unloading end position on the reel side, and the tape 2 is stored in the cassette. This operation is an unloading operation.

In a video tape recorder, the component that has the role of regulating the running of the magnetic tape 2 and making it run along a prescribed path without fluctuation is the magnetic tape guide, and is designated by symbols 3 and 3 in FIG.
The members indicated by 2, 10a, 9a, 9, 10.33 are magnetic tape guides.

If the installation precision of these magnetic tape guides is poor, the running precision of the magnetic tape 2 also deteriorates, which adversely affects the recording and reproducing screen.

In particular, the magnetic tape guides indicated by symbols 9 and 9a are inclined magnetic tape guides (-oblique guides) for correcting the torsion and correcting the advancing angle of the magnetic tape 2, and are used for recording and reproducing video signals. Since they are close to the cylinder drum 8 on which the head 30 is mounted, their planting accuracy is most important.

FIG. 1 shows an embodiment in which the present invention is applied to an inclined guide 9. As shown in FIG.

40 is a columnar magnetic tape guide member, 41 is a guide base, and the guide base 41 has a columnar magnetic tape guide member 4.
A planting hole 42 having an inner diameter larger than the outer diameter of the proximal end of the stem 0 is bored. The base end of the columnar magnetic tape guide member 40 is fitted into the planting hole 42, and an ultraviolet curing type UV
Adhesive 43 is filled and solidified. As a result, the columnar magnetic tape guide member 40 is fixed in a tilted state by a predetermined angle θ.

The assembly method of this embodiment will be explained with reference to FIG.

The columnar magnetic tape guide member 40 is held by the positioning jig 44, the base end of the columnar magnetic tape guide member 40 is fitted into the planting hole 42 of the guide base 41, and the columnar magnetic tape guide member 40 is held by the positioning jig 44. 40 at the specified angle and position. At this time, with the columnar magnetic tape guide member 40 installed, the gap between the proximal end of the columnar magnetic tape guide member 40 and the planting hole 42 is filled with an ultraviolet curable UV adhesive 43, and then an ultraviolet ray irradiation device is applied. The ultraviolet curing type UV adhesive 43 is irradiated with ultraviolet light to be cured.

The positioning jig may be of any type as long as it can set the columnar magnetic tape guide member 40 at a prescribed angle and position.

Although the magnetic tape guide in this embodiment is an inclined magnetic tape guide, the present invention can also be applied to other types of magnetic tape guides, such as a vertical magnetic tape guide. can.

(Effects) In the magnetic tape guide of the present invention, the diameter of the planting hole into which the columnar magnetic tape guide member is fitted is made larger than the outer diameter of the portion of the columnar magnetic tape guide member to which the columnar magnetic tape guide member is fitted. The gap between the tape guide member and the planting hole was filled with adhesive and solidified. As a result, the following effects can be achieved.

(1) Since the assembly accuracy of the magnetic tape guide is determined only by the positioning accuracy of the positioning jig, regardless of the accuracy of the parts, the assembly accuracy is increased.

(2) It becomes possible to use brittle materials for the magnetic tape guide.

(3) High-precision machining of parts is not required, and manufacturing is possible at low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment, and FIG. 2 is a perspective view showing an example of a tape running system of a tape recorder. 40... Columnar magnetic tape guide member, 42...
...hole for planting, 43...ultraviolet curing type UV adhesive.

Claims (2)

[Claims] (1) The base end of the columnar magnetic tape guide member is fitted into a planting hole having an inner diameter larger than the outer diameter of the base end, and between the base end and the planting hole. is filled with adhesive,
A magnetic tape guide for a magnetic recording and reproducing device, characterized in that it is solidified. (2) The magnetic tape guide according to claim 1, wherein the adhesive is an ultraviolet curable adhesive.