JPS6117572Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette tape recorder, and more particularly to a cassette tape recorder using an ultra-small tape cassette called a microcassette.

Compared to cassette tape recorders that use a general compact cassette, cassette tape recorders that use ultra-small tape cassettes such as micro cassettes have poor tape running stability when running magnetic tape at high speeds such as CUE/REV. In particular, thin magnetic tapes may not be wound.

It is an object of the present invention to provide a cassette tape recorder that eliminates the drawbacks of the prior art, has good stability even when the magnetic tape is run at high speed, and can wind the magnetic tape in an orderly manner.

Next, embodiments of the present invention will be illustrated and explained.
FIG. 1 is a schematic diagram of the cassette tape recorder in the PLAY state, and FIG. 2 is a schematic diagram of the cassette tape recorder in the CUE/REV state.

A pair of hubs 2, 2 are rotatably arranged inside the microcassette 1 at a predetermined interval, and a magnetic tape 3 is wound around the hubs. Magnetic tape 3 fed out from one hub 2
is guided to the front side of the microcassette 1 by a plurality of guide pins 4 and guide rollers 5, and then wound around the other hub 2. Although not shown, a head insertion opening is formed at the center of the front surface of the microcassette 1, and another head insertion opening is formed at a position symmetrical thereto. Pads 6 are arranged opposite the left and right head insertion openings, and the pads 6 are supported by leaf springs 7.

As shown in FIG. 1, in the PLAY state, the magnetic tape 3 is elastically held between the campus tape recorder's campus stamp 8 and the pinch roller 9, and is moved in a desired direction by the rotation of these. A head base 10 is arranged at a position facing the front surface of the microcassette 1, and is capable of moving forward and backward relative to the microcassette 1 by a predetermined distance. The head base 10 has a collective head 12 which integrally includes a recording/reproducing head and an erasing head and has a first tape guide plate 11 attached to the side surface.
, a second tape guide plate 13, and a third tape guide plate 14 are respectively mounted. When the microcassette 1 is installed in the cassette tape recorder, the first tape guide plate 11 and the collecting head 1
2 is inserted into the head insertion opening on the left side of the microcassette 1, the second tape guide plate 13 is inserted into the head insertion opening in the center, and the third tape guide plate 14 is inserted into the head insertion opening on the right side. A collection head 12, a second tape guide plate 13, and a fourth tape guide plate 14 are arranged at the top. Therefore, the second tape guide plate 13 is provided at a position facing approximately the center of the microcassette 1, and the first tape guide plate 11 and the third tape guide plate 14 are located approximately symmetrically with respect to the second tape guide plate 12. It is set in. During recording/playback (PLAY), the magnetic tape 3 passes through the third tape guide plate 14, the second tape guide plate 13, the collecting head 12, and the first tape guide plate 11 in this order.

As shown in Figures 3, 4 and 5,
Each tape guide plate 11, 13, 14 is provided with regulating protrusions 15, 15 facing each other on the upper and lower sides of the side facing the magnetic tape 3, the inner sides of which extend linearly. A recess 16 is formed between the lower regulating protrusion 15 and the side surface is U-shaped. The interval between the upper and lower regulating protrusions 15, 15 on the first tape guide plate 11 is L1, and the upper and lower regulating protrusions 15, 15 on the second tape guide plate 13 are L1.
When the distance between the upper and lower regulating protrusions 15, 15 on the third tape guide plate 14 is _L2 , and the distance between the upper and lower regulating protrusions 15, 15 on the third tape guide plate 14 is L3, the dimensional relationship is designed such that L1≦L2<L3.

As mentioned earlier, Figure 1 shows the PLAY state, and the head base 10 is connected to the micro cassette 1.
It is located close to. Therefore, the collection head 12
The magnetic tape 3 is inserted into the microcassette 1 by a predetermined distance from the head insertion opening on the left side, and the magnetic tape 3 is held elastically between the pad 6 and the collecting head 12. The magnetic tape 3 is also elastically held between a capstan 8 and a pinch roller 9, and the rotation of these rollers causes the magnetic tape 3 to run at a constant speed.

In FIGS. 3, 4, and 5, the positions of the tape guide plates 11, 13, and 14 indicated by solid lines are
Shows the position when in PLAY state. Each tape guide plate 11, 13, 14 is connected to the micro cassette 1.
the first tape guide plate 11 and the third tape guide plate 11.
The tape guide plate 14 has the magnetic tape 3 at the regulating protrusion 1.
It's almost in the middle of 5. On the other hand, the second tape guide plate 13 is positioned such that the magnetic tape 3 faces the tip of the regulating protrusion 15 . accordingly
In the PLAY state, the magnetic tape 3 is guided in the order of the third tape guide plate 14, the second tape guide plate 13, and the first tape guide plate 11, and the vertical movement of the magnetic tape 3 as it runs is regulated at three points. ing. Moreover, the distance L3 between the regulating protrusions 15, 15 on the third tape guide plate 14 is slightly larger than the spacing L1, L2 between the regulating protrusions 15, 15 on the other tape guide plates 11, 13. The accompanying vertical movement of the magnetic tape 3 is first roughly and reasonably regulated by the third tape guide plate 14, and then accurately positioned sequentially by the second tape guide plate 13 and the first tape guide plate 11. The opposing state between the collecting head 12 near the tape guide plate 11 and the magnetic tape 3 can be maintained properly. Further, by slightly increasing L3 of the third tape guide plate 14, a margin can be given to the accuracy of the mounting position thereof.

FIG. 2 shows the CUE/REV state, in which the pinch roller 9 is separated from the capstan 8 and the magnetic tape 3 is wound up at high speed as one hub 2 is rotationally driven. At this time, the head base 10 is moved back by a predetermined distance, and the collecting head 12 is slightly in contact with the magnetic tape 3.

In FIGS. 3, 4, and 5, the positions of each tape guide plate 11, 13, and 14 indicated by dotted lines are
Indicates the position in the CUE/REV state. Each tape guide plate 11, 13, 14 is retracted by a predetermined distance together with the head base 10, whereby the second tape guide plate 13 is removed from the magnetic tape 3 as shown in FIGS. 2 and 4. On the other hand, the first
Tape guide plate 11 and third tape guide plate 1
4 moves backward, but each of the regulating protrusions 15 faces the magnetic tape 3 at its tip. accordingly
In the CUE/REV state, the second tape guide plate 13 is not involved in guiding, and the vertical movement of the magnetic tape 3 is regulated by the first tape guide plate 11 and the third tape guide plate 14.

Usually, a recording/reproducing head and an erasing head are provided separately, and the erasing head is inserted through a head insertion opening formed in the center of the front surface of the microcassette.
On the other hand, there is a cassette tape recorder in which the recording/reproducing head is inserted through a head insertion slot on the left side of the microcassette. In this type of device, a tape guide plate is attached to each of the recording/reproducing head and the erasing head, so there is no need to provide a special tape guide plate. However, when using a collective head in which a recording/reproducing head and an erasing head are integrated, as in the cassette tape recorder of the present invention, the vertical movement of the magnetic tape cannot be sufficiently controlled by the tape guide plate attached thereto. , a separate tape guide plate is required.

When in the PLAY state, the magnetic tape must be held in the correct position relative to the collecting head when running, so it is necessary to provide a tape guide plate at a position facing the head insertion slot in the center of the front of the microcassette. be. Since the tape guide plate installed at this position is relatively close to the collecting head, it can work together with the tape guide plate attached to the collecting head to guide the magnetic tape to an appropriate position relative to the collecting head. .

However, when the magnetic tape is run at high speed in CUE/REV, etc., the collecting heads are in contact with each other, which tends to cause uneven tension on the magnetic tape, which causes tension near the upstream side of the collecting head in the magnetic tape running direction. The magnetic tape is twisted. As mentioned above, if a tape guide plate is provided at a position facing the front center of the microcassette and the structure is such that this tape guide plate guides the magnetic tape when the magnetic tape is running at high speed, it is possible to The magnetic tape may curl and be damaged at the tape guide plate.

As described above, the present invention provides a second tape guide member that restricts the vertical movement of the magnetic tape when it is running, at a position facing substantially the center of the tape cassette, and a second tape guide member that is located a predetermined distance apart from the second tape guide member. A collecting head integrally equipped with a recording/reproducing head and an erasing head is disposed in the magnetic head, a first tape guide member for regulating vertical movement during running of the magnetic tape is installed near the collecting head, and a first tape guide member is installed near the collecting head, and the second tape guide member A third tape guide member is provided at a position substantially symmetrical to the first tape guide member, with the third tape guide member regulating the vertical movement when the magnetic tape is running. and a third tape guide member guides the magnetic tape, and when the magnetic tape runs at high speed, the first tape guide member and the third tape guide member guide the magnetic tape. be.

Therefore, during recording and playback, the magnetic tape is guided at approximately equal intervals by the first tape guide member, the second tape guide member, and the third tape guide member, so there is no vertical movement of the magnetic tape and it is relative to the collecting head. The magnetic tape can be held in the proper position. On the other hand, when magnetic tape runs at high speed,
Since the second tape guide member is separated from the magnetic tape, it will not damage the magnetic tape. Second
Since the tape guide member is separated from the magnetic tape, the magnetic tape is in a state where it can easily move up and down, but this up and down movement is regulated by the third tape guide member.
Since the third tape guide member is relatively far from the collection head, the running magnetic tape will not be twisted near the third tape guide member, and therefore the third tape guide member will not damage the magnetic tape. Therefore, the guiding effect of the magnetic tape can be reliably demonstrated. For this reason, even when the magnetic tape runs at high speed, running stability is good, the magnetic tape is not damaged, and the winding state of the magnetic tape is also good.

[Brief explanation of the drawing]

All the figures are for explaining the cassette tape recorder according to the embodiment of the present invention.
Fig. 2 is a schematic diagram of the cassette tape recorder in the PLAY state, Fig. 2 is a schematic diagram of the cassette tape recorder in the CUE/REV state, and Fig. 3 is a side view of the main parts showing the positional relationship of the first tape guide plate with respect to the magnetic tape. , FIG. 4 is a side view of the main part showing the positional relationship of the second guide plate with respect to the magnetic tape, and FIG. 5 is a side view of the main part showing the positional relationship of the third guide plate with respect to the magnetic tape. 10...Head base, 11...First tape guide plate, 12...Collecting head, 13...Second tape guide plate, 14...Third tape guide plate, 15
...Regulatory protrusion.

Claims (1)

[Scope of utility model registration request] A second tape guide member is provided at a position facing substantially the center of the tape cassette for regulating the vertical movement of the magnetic tape during running, and a recording/reproducing head and an erasing head are provided at positions separated from the second tape guide member by a predetermined distance. An integrated collecting head is disposed, and a first tape guide member for regulating the vertical movement of the magnetic tape when it is running is installed near the collecting head, and the first tape guide is arranged around the second tape guide member. A third tape guide member is provided at a position almost symmetrical to the magnetic tape member to regulate vertical movement when the magnetic tape is running, and the first tape guide member, second tape guide member, and third tape guide member are used to control the magnetic tape during recording and reproduction of the magnetic tape. The tape is guided by the first tape guide member and the third tape guide member when the magnetic tape runs at high speed.
A cassette tape recorder characterized in that the tape guide member guides a magnetic tape.