JPS5911571A - Tape guide holding construction in magnetic recorder and reproducer - Google Patents

Abstract

PURPOSE:To ensure the accuracy of position of a guide roll to a rotary cylinder even with the use of a jig or the like for the assembling and adjustment of a catcher, by performing the positioning of the tape guide at a part of the same shaft as that of the guide roll. CONSTITUTION:An inlet tape guide 19 is moved toward the arrow E in a moving guide groove 22 provided at a guide chassis 21 while mating a driving pin 19d and a guide pin 19e. The inlet tape guide 19 is progressed in a groove 20b provided in the inlet catcher 20. The inlet tape guide 19 receives a force toward the arrow F with a spring 23 fixed to the inlet catcher 20, and the driving pin 19d constituted on the same shaft as the inlet guide roll 19a in this way is pressed and engaged to an inlet side V-groove 20a. Further, the guide pin 19e is pressed on the side surface of the guide groove 20b. Then, the inlet tape guide 19 is brought into press-contact with the inlet catcher 20 with a force toward the arrow G with the operation of an electromagnetic conversion element 24.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape guide holding mechanism of a magnetic tape loading section in a magnetic recording and reproducing device.
In particular, it aims to improve holding accuracy.

J! Magnetic recording/reproduction, in which magnetic tape is loaded onto a rotating cylinder equipped with a magnetic head and recorded/reproduced. In order to ensure track race accuracy performance of the magnetic head, it is required to improve the positional accuracy of the tape guide positioned near the rotating cylinder. A conventional example will be explained with reference to FIGS. 1 and 2. FIG. 1 is a plan view of the magnetic recording and reproducing apparatus, and FIG. 2 is a perspective view of the tape guide fixing means.

In FIG. 1, a 1-piece chassis, 2 a rotary cylinder on which a magnetic head is mounted, and a 3-piece cassette are shown. The cassette 5
Of these, 4 indicates the supply side reel, 5 indicates the take-up side reel, and 18
is a magnetic tape; valleys 10 and 11 are an entrance side catcher and an exit side catcher; I Jtd an erasing head that erases across the entire width of the magnetic tape 1B;
15 is a tension pin that detects the tape tension in order to control the tension of the magnetic tape 18 to a constant value; 15 is the magnetic tape 1;
8 is an impedance roller on the entrance side for damping longitudinal vibration; 16 is an impedance roller on the exit side; 17 is a control head for detecting the running speed of the magnetic tape 18; 7 is a pressure-bonded clamp between the capstan 6 and the magnetic tape. This is a pinch roller that drives the magnetic tape 18.

When the cassette 3 is installed in the chassis 1, the cassette 3
An entrance tape guide 8, an exit tape guide 9, and a capstan 6 are inserted into the path of the magnetic tape 18 formed therein. The entrance 5I11 tape guide 8 moves in the direction of arrow (c) in the figure and is held by the entrance side catcher 10.

Further, the exit tape guide 9 moves in the direction of the arrow) and is held by the exit catcher 11. Furthermore, the pinch roller 7 pinches the magnetic tape 18 and presses against the capstan 6 to drive the magnetic tape 18 at a constant speed in the direction of arrow (b). On the other hand, the rotating cylinder 2 rotates in the direction of arrow (A), and the magnetic head scans over the magnetic tape 1B.

Next, referring to FIG. 2, the means for fixing the tape guide will be explained. FIG. 2 shows the entrance side tape guide, the ID 8, and the entrance side catcher 10. 8α is a guide roller that changes the running direction of the magnetic tape, and 8h is a guide roller that changes the running direction of the magnetic tape.
8C is an inclined surface for positioning the tape guide 8 in the moving direction, f3d is a sliding surface when the tape guide 8 moves, 13t is a surface for transmitting driving force to the tape guide 8. Please drive the bottle. Reference numeral 19 indicates a sub-chassis placed on the yarn 1, and 20 indicates a guide groove for moving the tape guide 8 provided in the sub-chassis 719. In addition, 10α is a stopper provided on the entrance side catcher 10, IOA! 10C is a reference surface serving as a reference for positioning the tape guide 8, 10C is a width regulating U groove for positioning the tape guide 8, and 10d is a tilt regulating surface for regulating the tilt of the tape guide 8.

The entrance tape guide 8 moves along the guide groove 20 in the direction of arrow (c) in the figure, and is pressed and positioned by the entrance catcher 10. Positioning in the moving direction (c) is achieved by contact between the inclined surface 8C and the stopper 10α. Within the moving plane and perpendicular to the moving direction (-J direction to the arrow in the figure)
The positioning is performed by the drive pin 8- entering the width regulating U groove 10C. Rotation in the plane perpendicular to the movement direction (c) (arrow LM direction) can be prevented by contact between the sliding surface 8ct and the reference surface 10b, or in the tilting direction (arrow N-
(0 direction) is controlled by the tilt control surface 10d.

The tape guide holding mechanism described above has the following disadvantages due to its structure.

■Rules 1 for regulating the position of the catcher on each plane! j
11 is required, and since a wedge-shaped slope is used to regulate the position of the tape guide in the moving direction, the catcher has a three-dimensional and complicated structure.

■A wedge-shaped slope is used as a means of regulating the position of the tape guide, and even if the catcher is positioned using a jig etc. when fixing the catcher to the chassis, the slope of the tape guide and the shaft of the guide roller will not match. Since the distance between the jig and the tape guide or between the tape guides may differ, the position of the guide roller or the inclined pin with respect to the shear 7, that is, their position with respect to the rotating cylinder, is regulated within a high degree of precision. Can not.

The purpose of the present invention is to solve the above-mentioned disadvantages of the prior art,
It is an object of the present invention to provide a tape guide timekeeping mechanism that has a simple structure but has high positioning accuracy and can contribute to making a magnetic recording/reproducing device thinner and lighter.

A feature of the present invention is that the CQ positioning of the tape guide is performed by a V-shaped groove provided within the movement plane in a direction perpendicular to the movement direction, and the tape guide is regulated from tilting and tilting on a plane parallel to the movement plane. This is what I did.

Next, an embodiment according to the present invention will be described with reference to FIGS. 3 to 5. FIG. 6 is a perspective view showing the state in which the tape guide is moving, and FIGS. 4 and 5 are a plan view and a side view showing the state in which the tape guide is held.

In Fig. 6, 19 is an inlet tape guide, 19a
19A is an inlet guide roller, 19A is an inlet inclined guide, 19C is a sliding surface, 19d is a drive bin, and 19g is a guide bin. On the other hand, 20 is an inlet catcher, 2
0α is an inlet side r-groove, and 20b is a guide groove. Also 21
2 is a guide chassis, and 22 is a movement guide groove.

The inlet tape guide 19 moves in the direction of the arrow (E) in the figure by engaging the drive bin I9d and the guide bin 191 in the movement guide groove 22 provided in the guide chassis 21. An inlet catcher 20 is provided at the tip of the movement guide groove 22.
There is a groove 2 provided in the inlet catcher 20.
The inlet tape guide 19 enters the OA.

Next, the crimping mechanism of the inlet tape guide 19 will be explained with reference to FIGS. 4 and 5. Inlet catcher 20
Due to the spring 25 fixed to the inlet tape guide 19, the inlet tape guide 19 receives a force in the direction of the arrow in FIG. For this reason, the drive bin 1 is configured coaxially with the inlet guide roller 19α.
9d is pressed and locked to the inlet side V@20α. Further, the guide pin 19g is pressed against the side surface of the guide groove 20b.

Thereafter, as shown in FIG. 5, the other end of the crimping lever 25, which has one end engaged with the electromagnetic transducer 24 and whose central portion is pivotally supported by the rotation support shaft 26, operates the electromagnetic transducer 24. With the force in the direction of arrow T, the inlet tape guide 19
is crimped onto the inlet catcher 20.

As described above, according to the present invention, the following effects can be obtained.

■The tape guide is positioned coaxially with the guide roller, making it easier to assemble the catcher! 1lV
Even if a jig or the like is used, the positional accuracy of the guide roller relative to the rotating cylinder can be ensured.

■Since the shape of the catcher can be simplified to a flat shape, it is easy to improve the precision of the parts during manufacturing, and it is also possible to integrate the rotating cylinder base when installing the rotating cylinder on the chassis, making it possible to attach tape to the rotating cylinder. The relative positional accuracy of the guides is improved, the running accuracy of the magnetic tape can be improved, and the assembly and adjustment process of the catcher can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of a magnetic recording/reproducing device, FIG. 2 is a perspective view of a tape guide and catcher in a conventional example, FIG. 3 is a perspective view of a tape guide catcher in an embodiment, and FIGS. 4 and 5. FIG. 2 is a plan view and a side view showing a tape guide positioned by a catcher. 1... Chassis 1 2... Rotating cylinder, 18... Magnetic tape, 19... Inlet tape guide, 19α... Inlet guide roller, 19b... In 1 knot MM guide, 19c... Sliding surface, 19d... Drive bin, 19g... Guide pin, 20... Inlet catcher, 20α... Inlet side V groove, 20b... Guide groove, 21... Guide chassis, 22 ...Movement guide groove. Representative Patent Attorney Susuki 1) Toshiyuki Dai 1 Figure 1011 No.? -Figure 4? 3 Figure 5

Claims (1)

[Claims] 1. A rotating cylinder on which a magnetic head is mounted, a tape guide group for pulling out a magnetic tape from a cassette and winding the magnetic tape in a spiral shape at a predetermined angle around the rotating cylinder, and In a magnetic recording and reproducing device equipped with a fixing means that is deeply held in a predetermined position near the cylinder, the magnetic recording and reproducing device is engaged with a bottle set up in a tape guide group, and is arranged in a moving direction within a moving plane of the tape guide group. a first fixing means having a V-shaped groove opening in a direction different from the first fixing means for positioning the tape guide group within the movement plane; and a plane parallel to the movement plane of the tape guide group. A tape guide holding structure for a magnetic recording and reproducing apparatus, characterized in that a second fixing means for regulating the inclination of the tape guide group with respect to the moving plane is provided.