JPH0741733U - Magnetic tape recording / playback device - Google Patents

Abstract

(57) [Summary] [Object] To provide a magnetic tape recording / reproducing apparatus having a scratch generation preventing structure capable of surely preventing damage to a tilted post when assembled with a main chassis. [Structure] When the inclined posts 16A and 16B are in the first position before the magnetic tape is mounted, resin scratches are formed on the edges of the guide holes 10-1 and 10-2 of the main chassis 10 adjacent to the inclined posts. The prevention guide 20 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic tape recording / reproducing apparatus, and more particularly to a structure for preventing damage to an inclined post for winding a magnetic tape so as to be closely attached to a drum by being displaced from a first position to a second position when a magnetic tape cassette is mounted. Regarding

[0002]

[Prior art]

 The structure around the drum in the magnetic tape recording / reproducing apparatus will be briefly described with reference to FIGS. A drum base 12 that rotatably supports the drum 11 is mounted in a circular hole provided in the main chassis 10. The drum base 12 is attached by screwing the attachment pieces 12-1, 12-2, 12-3 provided on the three sides thereof to the main chassis 10. In the main chassis 10 around the drum 11, two guide holes 10-1 and 10-2 are formed in an inverted C shape.

The main chassis 10 is fixed to the apparatus chassis, and a sub chassis (only a part of which is shown at 13) is provided below the main chassis 10 so as to be movable with respect to the main chassis 10. Post bases 14A and 14B are attached to the sub-chassis 13 by screwing in correspondence with the guide holes 10-1 and 10-2. These post-bases 14A and 14B can also be displaced relative to each other along the guide holes 10-1 and 10-2 along with the displacement of the sub-chassis 13 in the direction away from the close state of FIG. Is attached to the sub chassis 13.

A guide roller 15A and an inclined post 16A made of metal, and a guide roller 15B and an inclined post 16B made of metal are attached to the post bases 14A and 14B as a pair below the main chassis 10. As shown in FIG. 5B, the pair of the guide roller 15A and the inclined post 16A and the pair of the guide roller 15B and the inclined post 16B are located above the main chassis 10 through the guide holes 10-1 and 10-2, respectively. Overhangs.

Before mounting the magnetic tape cassette, the post bases 14A and 14B are at the first positions A-1 and B-1, respectively. When the magnetic tape cassette is loaded, a part of the magnetic tape hangs on both the guide rollers 15A and 15B, and as the sub chassis 13 is displaced, the post bases 14A and 14B are respectively guided into the guide holes 10-1 and 10-2. Along the direction of the arrow to stop at the second positions A-2 and B-2. As a result, the guide rollers 15A and 15B on which the magnetic tapes are applied convey the magnetic tapes to the outer peripheral surface of the drum 11 while widening the distance between them, and when the magnetic tapes reach the second positions A-2 and B-2, the magnetic tapes The tape is brought into close contact with the outer peripheral surface of the drum 11. For reference, FIG. 4 shows the relationship between the guide roller, the inclined post, and the magnetic tape when the post bases 14A and 14B reach the second positions A-2 and B-2 by a chain line.

It should be noted that the inclined posts 16A and 16B are inclined because the drum 11 is supported in a state where the rotation shaft is inclined, and therefore the outer peripheral surface is also inclined. This is because the magnetic tape is closely attached.

[0007]

[Problems to be solved by the device]

 By the way, in such a magnetic tape recording / reproducing apparatus, when the sub chassis 13 is assembled on the lower side of the main chassis 10, the guide rollers 15A and 15B, the inclined posts 16A and 16B, and the guide holes 10-1 and 10-2 are provided. It is necessary to project above the main chassis 10 through. At this time, the clearance between the tilted posts 16A, 16B and the edges of the guide holes 10-1, 10-2 is very small, and the tilted posts 16A, 16B may be tilted because the tilted posts are tilted. It is easy to contact the edges of 1, 10-2. The main chassis 10 is made of metal, and the edges of the guide holes 10-1 and 10-2 are sharp, so the inclined posts 16A and 16B may be scratched by the edges. . If the tilt posts 16A and 16B are scratched, they will adversely affect the magnetic tape, and such tilt posts must be removed and reassembled.

In view of the above problems, an object of the present invention is to provide a magnetic tape recording having a scratch generation preventing structure capable of surely preventing scratches of the inclined posts during assembly with the main chassis. It is to provide a reproducing apparatus.

[0009]

[Means for Solving the Problems]

 According to the present invention, the drum is attached to the main chassis via the drum base, the sub chassis is movably attached to the main chassis below the main chassis, and the sub chassis is attached to the sub chassis. It has a pair of a combination of a guide roller that is attached via a post base and that protrudes above the main chassis through a guide hole provided in the main chassis, and a tilted post made of metal. Each pair of the guide roller and the inclined post is configured to be displaced from the first position to the second position along the guide hole to wind the magnetic tape of the magnetic tape cassette around a part of the drum. A magnetic tape recording / reproducing apparatus that is adjacent to the tilted post when the tilted post is in the first position. That the edge of the guide hole, a magnetic tape recording and reproducing apparatus characterized in that a resin scratch prevention guide is obtained.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, the same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted. In the present invention, when the post bases 14A and 14B, which are the edges of the two guide holes 10-1 and 10-2 provided in the main chassis 10, are in the first position described with reference to FIG. A scratch prevention guide 20 made of a resin material is provided at a position closest to the inclined posts 16A and 16B. The scratch prevention guide 20 is attached by utilizing a narrowed portion where a part of the main chassis 10 is narrowed between the two guide holes 10-1 and 10-2.

Therefore, as shown in FIG. 2, the scratch prevention guide 20 has a recess 20-1 on the lower side, which can be fitted with the throttled portion of the main chassis 10, and has a positioning regulation on the upper end. The restriction piece 20-2 is integrally formed. A circular portion is formed at the tip of the restricting piece 20-2, and as shown in FIG. 1, the circular portion is brought into contact with the side end of the mounting piece 12-3 for positioning.

In addition, as shown in FIG. 3, the tip of the attachment piece 12-3 abuts on the upper end of the scratch prevention guide 20 attached to the throttled portion of the main chassis 10 so as to move upward. A locking piece 12-4 for restricting movement is provided. As a result, when the scratch prevention guide 20 is attached to the narrowed portion and pressed by the locking piece 12-4, the movement is restricted in any direction. It does not have to be fixed to the other part.

By providing the scratch prevention guide 20 made of the resin material as described above, when assembling the main chassis 10 and the sub-chassis 13, the inclined posts 16A and 16B are provided with guide holes 10-1 and 10-2. Speaking of the edge, there is almost no risk of contact with the edge other than the scratch prevention guide 20. On the other hand, even if it contacts the scratch prevention guide 20, it does not scratch the inclined posts 16A and 16B at all because it is made of a resin material. Of course, the scratch prevention guide 20 does not hinder the movement of the inclined pins 16A and 16B between the first position and the second position.

[0014]

[Effect of device]

 As described above, in the present invention, when the main chassis and the sub-chassis are assembled, a resin material scratch prevention guide is provided at a position where the inclined posts may come into contact with each other. It is possible to reliably prevent damage to the inclined post due to the guide hole of the chassis. As a result, when assembling the above, it is not necessary for the operator to pay close attention so that the inclined post does not come into contact with the edge of the guide hole of the main chassis, so that the assembly work time can be shortened. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an internal structure of a magnetic tape recording / reproducing apparatus to which the present invention is applied.

FIG. 2 is a perspective view of a scratch prevention guide used in the present invention.

FIG. 3 is a cross-sectional view of a relationship between the scratch prevention guide shown in FIG. 2, a main chassis, and a locking piece as seen from a side surface.

FIG. 4 is a diagram showing a main part of an internal structure of a conventional magnetic tape recording / reproducing apparatus.

5 is an enlarged view of a part of the internal structure shown in FIG. 4. FIG.

[Explanation of symbols]

 10 Main Chassis 10-1, 10-2 Guide Hole 11 Drum 12 Drum Base 12-1, 12-2, 12-3 Attachment Piece 12-4 Locking Piece 13 Sub Chassis 14A, 14B Post Base 15A, 15B Guide Roller 16A , 16B Inclined post 20 Scratch prevention guide 20-1 Recess 20-2 Control piece

Claims (2)

[Scope of utility model registration request] 1. A drum mounted on a main chassis via a drum base, a sub chassis movably mounted on the lower side of the main chassis with respect to the main chassis, and a post base on the sub chassis. There is a pair of a combination of a guide roller, which is attached and protrudes above the main chassis through a guide hole provided in the main chassis, and an inclined post made of metal, and the guide roller and the Each pair of tilt posts is configured to be displaced from a first position to a second position along the guide hole to wind the magnetic tape of the magnetic tape cassette onto a portion of the drum. In the playback device,
A magnetic tape recording / reproducing apparatus characterized in that a resin scratch prevention guide is provided at an edge of the guide hole adjacent to the inclined post when the inclined post is in the first position. 2. The magnetic tape recording / reproducing apparatus according to claim 1, wherein the drum base is provided with a locking portion for pressing the scratch prevention guide.