JPS6343673Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reel stand for a cassette type recording/reproducing device.

[Background technology and its problems]

As is well known, for example, in a cassette tape recorder, the remaining amount of magnetic tape during recording or playback can be checked through a transparent window provided at the center of the upper and lower surfaces of the tape cassette.
However, when the tape cassette is installed, the inside of the tape cassette is dimly lit. For this reason, in the past, a light reflecting plate was attached with adhesive to the top surface of the cassette mounting board in correspondence with the transparent window, and external light was reflected by the light reflecting plate to illuminate the inside of the tape cassette as brightly as possible. It was designed to make it easier to check the remaining amount of magnetic tape.

However, such a structure in which the light reflecting plate is bonded to the upper surface of the cassette mounting board with an adhesive requires a large number of parts and a large number of installation steps, resulting in high costs. In addition, bonding work using adhesives is particularly troublesome;
Not only is workability low, but the adhesive tends to stain the hands and clothes of workers, which is not at all desirable.

[Purpose of invention]

The present invention aims to provide a cassette type recording/reproducing apparatus which can correct the above-mentioned defects.

[Summary of the idea]

The present invention is a cassette type recording and reproducing device in which the upper surface of the reel stand flange is plated to form a reflecting mirror, and the reel stand flange is exposed on the upper surface of the cassette mounting board, and it is not necessary to use a light reflecting plate. It disappears.

〔Example〕

An embodiment of a cassette tape recorder to which the present invention is applied will be described below with reference to the drawings.

First, as shown in FIGS. 1 and 2, a supply reel stand 3 and a take-up reel stand 4 are arranged on the cassette mounting board 2 of the tape recorder main body 1 with an interval left and right. These two reel stands 3, 4 are
Reel shafts 7 and 8 are provided at the upper center of the reel stand flanges 5 and 6. A capstan 10, a pair of left and right cassette positioning pins 11, 12, a magnetic head 13, a pinch roller 14, etc. are provided on the cassette mounting board 2.

Thus, both reel stand flanges 5, 6 of both reel stands 3, 4 are formed to have a sufficiently large diameter, and a gap G between these two reel stand flanges 5, 6 is formed to be a small gap. These reel stand flanges 5 and 6 are placed in a pair of left and right circular holes 15 and 16 formed in the cassette mounting board 2, and are exposed on the upper surface of the cassette mounting board 2.

The upper surfaces of both reel stand flanges 5 and 6 are plated, and reflecting mirrors 17 and 18 are formed on the upper surfaces.

Next, the structure of the supply reel stand 3 will be explained with reference to FIG. It is pivoted on.

At this time, the reel stand flange 5 is formed of a thin metal plate such as brass, and the reel shaft 7 is integrally molded of synthetic resin by outsert molding. A ring gear 22 is also integrally molded on the outer periphery of the reel stand flange 5 using synthetic resin by outsert molding. A metal plating surface 23 is provided on the upper surface of the reel stand flange 5, and the metal plating surface 23 is formed on the reflecting mirror 17. The supply reel stand 3 is provided with a flat motor 24 at the lower end of the reel center shaft 21.

Next, the structure of the take-up reel stand 4 will be explained with reference to FIG.
6 is fixed, and a reel shaft 8 of a take-up reel stand 4 is rotatably supported on the outer periphery of the reel center shaft 26. In this case, the reel shaft 8 is molded from synthetic resin and is fixed to the upper end outer periphery of a reel center tube 27 which is also molded from synthetic resin and is rotatably inserted into the outer periphery of the reel center shaft 26. Further, a lower reel stand flange 28 is integrally molded on the outer periphery of the lower end of the reel center cylinder 27, and the reel stand flange 6 is disposed above the lower reel stand flange 28.

At this time, the reel stand flange 6 is formed of a thin metal plate such as brass, and an inner ring 29 and a ring gear 30 are integrally molded with synthetic resin on the inner and outer peripheries by outsert molding. ing. A metal plating surface 31 is provided on the upper surface of the reel stand flange 6, and the metal plating surface 31 is formed on the reflecting mirror 18. An annular felt plate 32 bonded to the lower surface of the reel stand flange 6 is pressed against the lower reel stand flange 28 by a compression spring 33 that presses the inner ring 29 from above.
The friction clutch 34 is pressed against the upper surface of the friction clutch 34. Further, an internal gear 35 is integrally molded on the outer periphery of the lower reel stand flange 28.

Both reel stands 3 and 4 are constructed as described above. During recording or reproduction, the reel stand flange 6 of the take-up reel stand 4 is driven via the ring gear 30 by an intermediate gear (not shown) driven by the flat motor 24. The rotational force of the reel stand flange 6 is transmitted to the lower reel stand flange 28 via the friction clutch 34, and the reel shaft 8 is driven via the reel center cylinder 27.

Next, during rapid feed, the reel stand flange 5 of the supply reel stand 3 is driven via the ring gear 22 by the intermediate gear also driven by the flat motor 24, and the reel stand flange 5 directly reels the reel shaft. 7 is driven. Also, when rewinding,
The lower reel stand flange 28 of the take-up reel stand 4 is driven via an internal gear 35 by an intermediate gear also driven by the flat motor 24, and the lower reel stand flange 28 drives the reel center cylinder 2.
The reel shaft 8 is configured to be driven via the reel shaft 7.

Next, FIGS. 5 and 6 show a state in which a tape cassette (compact cassette is shown here) 37 is attached to the tape recorder main body 1. As is well known, a magnetic tape 40 wound around the outer periphery of a pair of left and right reel hubs 38 and 39 is housed in the tape cassette 37, and a pair of magnetic tapes 40 are provided in the center of the upper and lower surfaces for checking the remaining amount of the magnetic tape 40. Transparent windows 41 and 42 are provided.

During recording or reproduction, the magnetic head 13 is brought into contact with the magnetic tape 40 in the tape cassette 37, as shown in FIG.
0, and the magnetic tape 40 is run at a constant speed to be wound onto the reel hub 39 on the winding side, thereby performing desired recording or reproduction.

Therefore, in the cassette tape recorder of the present invention, both reel stands 3 and 4 are formed to have a sufficiently large diameter and are exposed on the upper surface of the cassette mounting board 2.
The upper surfaces of both reel stand flanges 5 and 6 are reflective mirrors 1
7, 18, both transparent windows 41,
External light entering through 42 is reflected by both reflecting mirrors 17 and 18, and is reflected by the tape cassette 3.
7 Brightly illuminate the interior. Therefore, during recording or playback, fast forwarding or rewinding, the upper transparent window 4
1 through the magnetic tape 4 in the tape cassette 37.
You can check the remaining amount of 0 very easily.

[Application example]

The present invention is not limited to tape recorders that use compact cassettes, but can be applied to various tape recorders that use tape cassettes of various sizes.
It is applicable to various cassette-type recording and reproducing devices such as VTRs.

[Effect of idea]

As mentioned above, the present invention is a cassette type recording/reproducing device in which the upper surface of the reel stand flange is plated to form a reflecting mirror, and the reel stand flange is exposed on the upper surface of the cassette mounting board. At times, the inside of the tape cassette can be brightly illuminated by reflecting external light on the upper surface of the reel stand flange, making it extremely easy to check the remaining amount of magnetic tape in the tape cassette.
Since the reel stand flange also serves as a conventional light reflecting plate, the light reflecting plate can be omitted, the number of parts and the number of installation steps can be reduced, and costs can be reduced. In particular, since the extremely troublesome work of gluing the light reflecting plate with adhesive can be omitted, childbirth efficiency can be greatly improved.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a cassette tape recorder, in which Fig. 1 is a plan view of the tape recorder main body, and Fig. 2 is a plan view of the main body of the tape recorder.
3 and 4 are enlarged sectional views of the reel stand, FIG. 5 is a plan view of the tape cassette attached to the tape recorder body, and FIG. 6 is a sectional view taken along the line shown in FIG. 5. . In the symbols used in the drawings, 2...cassette mounting board, 3...supply reel stand, 4...take-up reel stand, 5, 6...reel stand flange, 7, 8...
... Reel shaft, 17, 18 ... Reflector, 37 ... Tape cassette, 40 ... Magnetic tape, 41, 42
...It's a transparent window.

Claims (1)

[Scope of utility model registration request] A cassette type recording and reproducing device in which the upper surface of a reel stand flange is plated to form a reflecting mirror, and the reel stand flange is exposed on the upper surface of a cassette mounting board.