JPS5830283Y2 - Cassette type recording/playback device - Google Patents

Description

[Detailed Description of the Invention] The present invention is a cassette-type recording and reproducing device that is most suitable for application to, for example, a cassette-type tape recorder, and is usually called a micro cassette. The present invention relates to a tape cassette in which a pair of tape pads arranged along the tape running direction are provided on both ends of the leaf spring in the longitudinal direction.

As previously known, the super! is usually called a micro cassette! 1
- In the type cassette, in order to be able to use it for the center capstan, the tape pads are not provided in the center of the cassette, but are provided in pairs on the left and right sides (
However, the reason why a pair of tape pads are provided on the left and right sides is so that the cassette can be used upside down.

) However, in conventional tape recorders that use micro cassettes, the recording/reproducing head is pressed against the tape pad at one end of the leaf spring, which is the tape exit side, and the tape pad at the other end of the leaf spring, which is the tape entrance side, is left free. was.

However, the tape pad is used to elastically attach the tape to the head, and due to dimensional accuracy issues, under normal conditions when the head is not inserted into the cassette, this tape pad is attached by leaf springs. It was designed to wrap around the tape travel path.

Therefore, in this type of conventional tape recorder, the tape pad at the other end of the leaf spring, which is idle at the tape inlet side while the tape is running, tends to accidentally come into contact with the tape while it is free to move (idle). .

This causes the tape pad to vibrate due to irregular contact with the tape while the tape is running, which has a significant negative effect on the tape running accuracy (wow and flutter problems).

The present invention was devised to eliminate the above-mentioned defects, and includes a head facing one of the pair of tape pads and a tape guide facing the other, and these heads and tape guides are connected to each other. The pair of tape pads are fixedly provided on the same sliding substrate, and the head and the tape guide are brought into contact with the tape running in the tape cassette by sliding of the sliding substrate, so that the pair of tape pads are connected to the head and the tape guide. The structure is such that it can be pressed simultaneously by both.

With this configuration, the tape can be run stably without adversely affecting the running accuracy of the tape due to the tape pad on the tape inlet side.

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

Note that the tape cassette used here is an ultra-small cassette usually called a microcassette.

As shown in FIG. 1, a tape cassette (hereinafter simply referred to as a cassette) 1 contains a magnetic tape (hereinafter simply referred to as a tape) 3 wound around a pair of reels 2ay 2b with both ends secured. It is stored.

This cassette 1 has five
One window hole 4a, 4b, 4c, 4d.

4e is formed and buttoned, and the tape 3 has a pair of left and right guides a-ra 5ay5b, and four guide pins 6a, 6b.
, 6c, and 6d to pass along the front surface 1a.

A pair of tape pads 8a and sb made of felt or the like are installed in the cassette 1 at both left and right ends 7a and 7b of a substantially trapezoidal leaf spring 1.

Both tape pads 8ay 8b have two window holes 4.
It is placed on the back side of the tape 3 at the back of the tapes b and 4d.

Furthermore, three pin insertion holes 9a, 9b, and 9c are formed in the inner parts of the three window holes 4a, 4c, and 4e of the cassette 1, which penetrate the cassette vertically.

On the other hand, on the chassis of the tape recorder body are a pair of reel shafts 13a, 13b, a capstan 14, and a guide bin 11.
It is distributed evenly.

Further, a recording/reproducing head 16, an erasing head 1,
7. Pinch rollers 18 etc. are attached.

Therefore, the reel hub 2at2bK and both reel shafts 13a, 13 with the cassette 1 mounted at the position t(i) on the chassis are
b is inserted, and the guide pin 11 and capstan 14 are inserted into the two pin insertion holes 9a and 9c, respectively, resulting in the state shown in FIG.

When the head board 15 is moved forward in the above state, the pinch roller 18 is inserted into the cassette 1 through the window hole 4e, and in order to attach the tape 8 to the capstan 14, it is coupled with the drive of the reel 2b. Tape 8 or reel 2a to 2
It runs at a constant speed so as to be wound onto the b side.

At this time, the recording/reproducing head 16 and the erasing head 17 are inserted into the cassette 1 through the window holes 4d and 4c, respectively.
These are brought into close contact with the tape 3 to perform desired recording or reproduction.

In this apparatus, the recording/reproducing head 16 is attached to one tape pad 8b as shown in FIG. 1, and the tape guide 21 is attached to the other tape pad 8a.

Here, the details of the tape guide 21 will be explained with reference to FIG. 1 and FIGS. 2 to 4. The tape guide 21 is mounted on the head substrate 15, and when the head substrate 15 moves forward, it opens the window. 4b into the cassette 1 to guide the tape 3 and to attach the tape 8 to the tape pad 8a in an EE manner.

The tape guide 21 as a lever has a tape guide surface 22 that contacts the surface of the tape 3, and a pair of upper and lower etch regulating parts 23 and 24 that regulate both upper and lower etch of the tape 8, and the tape guide surface 22 has a tape guide surface 22 that contacts the surface of the tape 3. The most protruding surface portion 22a of the tape guide surface 22 is formed into a curved surface that curves in the direction.
This tape guide surface 22 and both etch regulating portions 23
．． The tips ff123a, 24a of 24 are formed so as to be face-down or almost face-down.

The button tape pad 8at8b has a vertical width that is sufficiently larger than the tape width.

Therefore, when the tape guide 21 having the above structure is attached to the tape 3, the tape 3 curves between the two guide pins 6a and 6b in the cassette 1 along the curvature of the tape guide surface 22 as shown in the figure. The leaf spring 70 is pressed against the elasticity of the tape pad 8a.

At this time, both the upper and lower edges of the tape 3 are coated with the etch control agent 2.
It will definitely be regulated between 3 and 24.

At the same time, the tape 3 is uniformly pressed onto the tape pad 8a in substantially line contact in the tape width direction at the most protruding surface portion 22a of the tape guide surface 22.

As a result, the tape tension is made constant during recording or reproduction, and the tape 3 hits both heads 16, 17 evenly, making it possible to perform highly accurate recording or reproduction.

Further, the tape 3 is reliably regulated in its vertical position and runs stably, and disturbances in tape running due to winding of the tape 3 at the IJ-ru hub 2a on the supply side are alleviated.

As described above, the present invention includes a pair of tape pads provided at both ends of a leaf spring and arranged along the tape running direction, a head facing one of the pads and a tape guide facing the other. A head and a tape guide are fixedly provided on the same sliding substrate, and the sliding of this sliding substrate brings the head and tape guide into contact with the tape running inside the tape cassette, and the pair of tape pads are attached to the heads. Since the tape pad is configured to be pressed at the same time by the tape pad and the tape guide, it prevents the tape pad on the tape inlet side from coming into contact with the tape while it is freely movable (playing state) as in the past. Since the free movement of the tape pad can be reliably restricted by the tape guide, it is possible to prevent the tape pad from adversely affecting the running accuracy of the tape.

Moreover, a button is pressed on the tape entrance side to elastically sandwich the tape between the tape pad and the tape guide.
Since an appropriate tension can be applied to the tape, the running of the tape can be made extremely stable.

Therefore, according to this recording/playback device, wah and wah effects occur on the running tape.
Flutter and the like can be prevented as much as possible, and recording and reproduction can be performed with extremely high precision.

However, since the structure only includes the addition of the tape guide, the structure and manufacturing are simple and low cost.

[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 partially cutaway plan view, and Fig. 2 is an enlarged sectional view taken along the line ■-■ in Fig. 1. , FIG. 3 is a sectional view taken along the line ■--■ in FIG. 2, and FIG. 4 is a perspective view of the main parts. Also, regarding the symbols used in the drawings, 1 is a tape cassette, 3 is a magnetic tape, 7 is a leaf spring, and 8a s
sb is a tape pad, 10 is a head substrate which is a sliding substrate, 16 is a recording/reproducing head, and 21 is a tape guide.

Claims (1)

[Scope of utility model registration request] A cassette type recording and reproducing device that uses a tape cassette that supports a leaf spring in the longitudinal center thereof and that has a pair of tape pads arranged along the tape running direction on both longitudinal ends of the leaf spring. The apparatus is provided with a head facing one of the pair of tape pads and a tape guide facing the other, and these heads and tape guides are fixedly provided on the same sliding substrate, and this sliding The present invention is characterized in that the head and the tape guide are brought into contact with the tape running in the tape cassette by sliding of the substrate, and the pair of tape pads are simultaneously pressed by the head and the tape guide. Cassette type recording/playback device.