JPS6362817B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape guide mechanism for a tape recorder.

It is necessary to run the tape at a constant speed and at the correct position relative to the magnetic head for accurate recording and playback of the tape in a tape recorder. In particular, the tape is required to run in a position where there is no misalignment of the tape track with respect to the gap of the magnetic head and no angular misalignment of the tape in the horizontal and vertical directions. A tape guide mechanism is provided in a tape recorder in order to run the tape in such a correct position. Known tape guide mechanisms are generally constructed with a pair of tape guides having a ]-shaped notch. These tape guides are arranged on the upstream and downstream sides of the magnetic head in the tape running direction. Generally, one tape guide is formed integrally with the side surface of the magnetic head case, and the other tape guide is formed on the head lever and spaced apart from the magnetic head. In such known tape guide mechanisms, one tape guide is located very close to the gap of the magnetic head, making it difficult to provide a large distance between the tape guides. Particularly in tape recorders, there is a demand for miniaturization, and the tape guide on the head lever cannot be disposed sufficiently far from the magnetic head.

Needless to say, the tape guide is an important member for ensuring that the tape runs at the correct position relative to the magnetic head. Therefore, the tape guide must be made accurately and installed in the correct position during assembly. However, as mentioned above, the pair of tape guides placed across the magnetic head are not sufficiently spaced apart. Therefore, if there are manufacturing errors or installation errors in the tape guides, the inclination angle of the tape between the tape guides will increase, which will greatly affect the positional deviation of the tape track and the angular deviation of the tape, making accurate recording and playback difficult. Furthermore, since one of the tape guides is formed integrally with the magnetic head case, the case requires sufficient machining precision, making it difficult to produce the case at a low cost.

Furthermore, as mentioned above, for accurate recording and playback, it is also necessary to run the tape at a constant speed. Generally, the driving force of a motor is transmitted to a flywheel via, for example, an endless belt, and rotates a capstan shaft integrally with the flywheel. The tape is run by being held between the capstan shaft and a rotatable pinch roller that is pressed against the capstan shaft. Therefore, in order to run the tape at a constant speed, it is required to run the tape at a certain position between the pinch roller and the capstan shaft, specifically at a certain position in the height direction with respect to the pinch roller. However, in the known configuration, regulation of the position of the tape with respect to the pinch roller is not taken into consideration, and vertical vibration of the tape cannot necessarily be sufficiently prevented.

The object of the present invention is to provide a tape guide mechanism for a tape recorder that eliminates the drawbacks of the prior art described above and enables accurate recording and playback.

In order to achieve this object, according to the present invention, a tape guide pinch roller is disposed on the lever, which was conventionally formed integrally with the magnetic head case. In such a configuration, the tape guide on the pinch roller lever can be spaced apart from the magnetic head on the head lever. In addition, since the tape guide is provided on the pinch roller lever, the tape can be guided at a position adjacent to the pinch roller, and vertical vibration of the tape can be prevented.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tape guide mechanism for a tape recorder according to a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a part of an auto-reverse tape recorder incorporating a tape guide mechanism 10 according to an embodiment of the present invention. As can be seen from FIG. 1, the tape guide mechanism 10 includes first tape guides 14,
15, and second tape guides 18 and 19 disposed on the pinch roller lever 16, respectively. The head lever 12 is rotatably mounted on the base plate 22 of the tape recorder by a pivot pin 20. And pinch roller lever 1
6 has a pinch roller 24 and the head lever 12
is located above the substrate 2 by an upright post 26.
It is rotatably mounted on 2. The head lever 12 includes magnetic heads 28 and 29 at approximately the middle of each side of the rotation pin 20, which is the center of rotation, and the first tape guides 14 and 15 are arranged at the ends of each side. It is set up. Here, the magnetic head 28 and tape guide 14 and the magnetic head 29 and tape guide 15 are used in pairs. That is, the first tape guide 14 is located on the head lever 12 on a different side from the pinch roller 24 with respect to the corresponding magnetic head 28. Further, the second tape guide 15 is located on the head lever 12 on a different side from the pinch roller 24 with respect to the corresponding magnetic head 29. As shown in FIG. 1, when the tape 30 runs from the left to the right, the magnetic head 28 comes into contact with the tape guided by the tape guide 14. Further, as shown in FIG. 2, when the tape 30 runs from the right to the left, the magnetic head 29 comes into contact with the tape guided by the tape guide 15.

The pinch roller 24 is rotatably supported on the pinch roller lever 16 by a shaft 32, as shown in FIGS. 3 and 4. Second tape guides 18 and 19 are disposed on the pinch roller lever in a region spaced apart from the magnetic head 28 and adjacent to the pinch roller 24, surrounding the pinch roller. These tape guides 1
8 and 19 are disposed surrounding the pinch roller from both sides so as to partially cover the pinch roller 24. These tape guides 18 and 19 function as tape guides when the tape 30 runs in either the left or right direction. In other words, in FIG. 1, the tape 30 is connected to the tape guide 14,
In FIG. 2, the tape is guided by tape guides 15, 19, and 18, respectively. Therefore, the distance between tape guides 14 and 19 (see FIG. 1) and the distance between tape guides 15 and 18 (see FIG. 2) can be set large.

As described above, according to the tape guide mechanism of the tape recorder according to the present invention, the first tape guide is disposed on the head lever, and the second tape guide is disposed on the pinch roller lever in an area spaced apart from the magnetic head. . In such a configuration, the first
The distance between the second tape guides can be set large. Therefore, tape guides 14, 15, 18, 1
Even if there are manufacturing errors or installation errors, the inclination angle of the tape between the tape guides is smaller than that of the conventional tape guide mechanism. Therefore, it is possible to suppress tape track positional deviations and tape angular deviations due to manufacturing errors and installation errors, thereby ensuring accurate recording and playback. Further, in the conventional tape guide mechanism, one tape guide was formed integrally with the magnetic head case, whereas the tape guide mechanism of the present invention does not have a tape guide integral with the magnetic head case. Therefore, the magnetic head case does not require much processing precision and can be produced at low cost. In addition, since the second tape guides 18 and 19 are disposed on the pinch roller lever, the tape guide 1 for the pinch roller
The relative positions of 8 and 19 can be set accurately. Therefore, the position of the tape relative to the pinch roller can be sufficiently regulated, and vertical vibration of the tape can be sufficiently prevented by the tape guides 18 and 19, thereby ensuring more accurate recording and reproduction.

The above embodiments are for illustrating this invention, and are not intended to limit this invention in any way, and any modifications, modifications, etc. made within the technical scope of this invention are also included in this invention. Needless to say. For example, in the embodiment, the tape guide mechanism according to the present invention is incorporated into an auto-reverse tape recorder. However, it goes without saying that the tape guide mechanism of the present invention is not limited to auto-reverse type tape recorders, but can also be applied to ordinary tape recorders. Also, since it is built into an auto-reverse tape recorder, the second tape guide 1
8 and 19 are arranged surrounding the pinch roller 24 from both sides. And these tape guides 1
8 and 19 function as tape guides no matter which direction the tape runs. By guiding the tape on both sides of the pinch roller in this manner, vertical vibration of the tape can be more reliably prevented. Therefore, even in a normal tape recorder that is not an auto-reverse type, it is preferable to guide the tape on both sides of the pinch roller.

[Brief explanation of drawings]

1 and 2 are partial plan views of an auto-reverse tape recorder incorporating a tape guide mechanism according to an embodiment of the present invention, and FIGS. 3 and 4 are plan views and front views of a pinch roller lever. It is. 10... Tape guide mechanism, 12... Head lever, 14, 15... First tape guide, 16
... Pinch roller lever, 18, 19 ... Second tape guide, 24 ... Pinch roller, 28, 2
9...magnetic head, 30...tape.

Claims (1)

[Scope of Claims] 1. In a tape guide for a tape recorder having a head lever provided with a magnetic head and a pinch roller lever provided with a pinch roller, a first tape guide provided on the head lever for guiding the running of the magnetic tape is provided. A tape guide, and a second tape guide provided on the pinch roller lever to guide the running of the magnetic tape, the first and second tape guides being located on both sides of the magnetic head, respectively. A tape guide mechanism for a tape recorder characterized by: