JPS61187146A - Back and forth running type cassette tape recorder - Google Patents

Abstract

PURPOSE:To enable the stable running of a tape even when the pressure contacting point between a capstan and a pinch roller is on the tape supplying side by providing a tape guide along a part of outer circumference of a pinch roller. CONSTITUTION:A tape guide 5 having an arc approximate to a roller 4 is placed in a part of the pinch roller 4 of a tape recorder that makes back and forth running by a set of a capstan and a pinch roller, and side walls 5a and 5b are formed on its both sides. When a tape 2 runs to the left shown by an arrow, the pressure contacting point between the capstan 3 and pinch roller 4 comes to the upstream side, that is tape supplying side. However, as the tape 2 is guided by side walls 5a, 5b, pushing up and pushing down of the tape are not caused. Accordingly, the tape can be run both ways stably even when a set of capstan and pinch roller is used.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a reciprocating type cassette tape recorder,
In particular, the present invention relates to a reciprocating type cassette tape recorder in which the tape can be reciprocated at a constant speed using only one set of capstans and pinch rollers.

(Background of the invention) The conventional reciprocating type cassette tape recorder
As described in No. 7-47969, two sets of capstans and pinch rollers are provided, one set is used for running the tape in the outward direction, and the other set is used for running the tape in the backward direction. Was.

Further, each pair of the capstan and the pinch roller is selectively switched so that the pressure contact position is on the tape side.

This conventional device has a problem in that it has a complicated structure.

In order to solve this problem, a conventional method has been to simplify the structure by moving back and forth at a constant speed using only one set of capstans and pinch rollers. However, in the device described in Japanese Patent Publication No. 52-32243 that uses only one set of a capstan and a pinch roller, when the pressure contact position of the capstan and the pinch roller is on the tape supply side (this The tape rose and fell.

FIG. 7 (al) (bl) is a diagram showing how the tape rises and falls in the conventional device 1 described above. In the figure, 2 is the tape, 3 is the capstan, and 4 is the pinch roller. shows.

When the pressure contact position B between the capstan 3 and the pinch roller 4 is on the tape supply side, that is, when the tape 2 runs in the direction of the arrow, the tape 2 is moved as shown in FIG. 7(a). As shown in the same figure (bl), it may rise up as if it were in the air, or it may fall down as shown in the same figure (bl).

When the tape rises and falls as described above, there is a problem in that stable tape running cannot be obtained.

(Object of the Invention) The object of the present invention is to eliminate the problems of the conventional device described above, and to
In a cassette tape recorder that enables constant speed reciprocating using only a set of capstans and pinch rollers,
The object of the present invention is to enable stable tape running when the capstan and pinch roller are on the tape supply side, and to simplify the structure.

(Summary of the Invention) The present invention provides a reciprocating tape recorder that is configured to run reciprocatingly at a constant speed using only one set of capstan and a pinch roller, the upstream side of the pinch roller when the capstan is engaged, The present invention is characterized in that a tape guide is provided along a part of the outer periphery of the pinch roller to prevent the tape from coming off the tape guide, thereby improving tape running stability.

Further, the present invention is characterized in that a tape guide is also provided on the downstream side of the pinch roller, so that the contact portion of the tape with the pinch roller is only the pressure contact point between the capstan and the pinch row 2.

(Embodiment of the invention) An embodiment of the invention is shown below in FIGS. 1, 2 and 3.
This will be explained using figures.

FIG. 1 shows a plan view including a sectional view of the front surface of the cassette 1 when the cassette 1 is installed in a tape recorder.

In Figure 1, 1 is a cassette, 2 is a tape,
Itsuka T 41 Pass No. $ Roller - 9 size invention (this tape guide, 6 is a recording/reproducing head, 7 is a hole drilled in cassette 1, 8 and 9 are holes drilled in cassette 11) Note that the tape guide 5 is configured to move in a plane together with the pinch row 24 when the operation button is operated.

2 is a side view of the pinch roller 4 and tape guide 5 shown in FIG. 1, and FIG. 3 is a sectional view taken along the line x-x' of FIG. An enlarged view is shown. In addition, in Figure 2.3.

The same reference numerals as in FIG. 1 indicate the same parts.

In FIG. 1, when the cassette 1 is loaded into a tape recorder, the capstan 3 is inserted into the hole 7. Further, a pinch roller 4 and a recording/reproducing head 6 are opposed to each of the openings 8 and 9 of the cassette 1.

Next, when the playback button is turned on to start playback, the pinch roller 4 and the recording/reproducing head 6 move forward, and the pinch roller 4 is pressed against the capstan 3, while the recording/reproducing head 6 presses the tape 2 into an appropriate position. Contact with contact pressure.

At this time, the tape guide 5 moves together with the pinch roller 4 to the position shown in FIG.

Now, if the capstan 3 is rotated counterclockwise, the tape 2 will be fed to the right in FIG. Therefore, the pressure contact position between the capstan 3 and the pinch roller 4 is on the downstream side of the recording/reproducing head 6, that is, on the tape winding side,
The tape runs normally without any rise or fall on the tape.

On the other hand, due to auto-reverse etc., the pinch roller 3
As shown in FIGS. 2 and 3, when the tape 2 begins to rotate clockwise, it begins to run to the left (in the direction of the arrow) in FIG. 1. At this time, the pressure contact position between the capstan 3 and the pinch row 24 is located upstream of the recording/reproducing head 6, that is, on the tape supply side, and in the conventional apparatus, the tape 2 rises or falls.

However, in this embodiment, as is clear from FIGS. 2 and 3, the tape guide 5 is provided on the upstream side of the capstan 3 when the capstan 3 and the pinch roller 4 are on the tape 2 supply side. It is being The tape guide 5 has an arc similar to the pinch row 24 on the side closer to the capstan 3, and side walls 5& and 5b are formed on both sides thereof.

Therefore, as shown in FIG. 2, the tape 2 travels while being guided by the side walls 5a and 5b, and does not protrude outside the side walls, so that the tape 2 does not rise up or rise as described above. It is possible to make it less likely that the product will sag.

Therefore, as shown in FIG. 2, the tape can be run stably.

Further, as shown in FIG. 3, if the left end of the tape guide 5 is placed near the pressure contact part B between the capstan 3 and the pinch roller 4, so that the tape 2 is in close contact with the capstan 3, the -1 It was found that the tape could be run stably.

Next, other embodiments of the present invention will be described with reference to FIGS. 4, 5, and 6. Fig. 4 is a side view including a partial sectional view similar to Fig. 1, Fig. 5 is a side view similar to Fig. 2, and Fig. 6 is a sectional view taken along the Y-Y' line of Fig. 5. show.

In FIGS. 4 to 6, 10 indicates a second tape guide, and other symbols indicate the same or equivalent components as those with the same symbols in FIGS. 1 to 3. Note that the second tape guide 10 is configured to move in the same plane as the pinch roller 4 when the operation button is operated.

This example is the first; I! The difference from the embodiment is that when the tape 2 is traveling in the direction of the arrow, a force is applied to the tape 2 in the direction away from the pinch roller 4 at the pressure contact point R11Ill between the capstan 3 and the pinch roller 4. This embodiment is the same as the first embodiment except that the tape guide 10 is provided. Like the first tape guide 5, the second tape guide 10 has side walls 10a and 10b for preventing the tape 2 from shifting in the direction perpendicular to its running path.

When rubbing configuration 5 as in this embodiment, it is possible to reliably rub only the portion where the tape 2 contacts the pinch roller 4 and the portion where the capstan 3 and the pinch roller 4 are in pressure contact. Therefore, when the capstan 3 and the pinch roller 4 are on the supply side of the tape 2, it is possible to further prevent the tape 2 from rising and falling.

It has also been found that the first and second tape guides 5 and 10 contribute to stable tape running even when the capstan 3 and pinch roller 4 are located on the winding side.

(Effects of the Invention) According to the present invention, in a cassette tape recorder that performs constant speed reciprocating using only one set of capstan and pinch roller, the one set of capstan and pinch roller is on the tape supply side. Even if the tape is located at

Further, since constant speed reciprocating is possible with only one set of capstan and pinch roller, the structure can be simplified.

[Brief explanation of drawings]

FIG. 1 is a partially sectional plan view showing one embodiment of the present invention, and FIG.
The figure is a side view of the vicinity of the capstan and pinch roller in Figure 1, Figure 3 is a sectional view taken along the line X-X in Figure 2, and the fourth factor is a partially sectional plan view of another dormitory embodiment of the present invention. Figure 5 is a side view of the vicinity of the capstan and pinch roller in Figure 4, Figure 6 is a sectional view taken along the line Y-Y' in Figure 5, and Figure 7 is a diagram showing the capstan and the vicinity of the pinch roller in Figure 4. , is a side view of the vicinity of the pinch roller.

Claims (3)

[Claims] (1) Using only one set of capstan and pinch roller,
In a reciprocating type cassette tape recorder in which the rotation direction is selectively switched and the tape runs at a constant speed in the outward direction or in the backward direction, the capstan and the pinch roller set when the capstan and the pinch roller are on the tape supply side. A reciprocating type cassette tape, characterized in that a first tape guide is provided on the tape upstream side of the pressure contact point of the pinch roller, along a part of the outer periphery of the pinch roller, and having an arc similar to that of the pinch roller. recorder. (2) The part where the tape touches the pinch roller,
2. The reciprocating type cassette tape recorder according to claim 1, characterized in that there is only a pressure contact point between the capstan and the pinch roller. (3) Using only one set of capstan and pinch roller,
In a reciprocating type cassette tape recorder in which the rotation direction is selectively switched and the tape runs at a constant speed in the outward direction or in the backward direction, the capstan and the pinch roller set when the capstan and the pinch roller are on the tape supply side. a first tape guide provided on the tape upstream side of the pressure contact point of the pinch roller and along a part of the outer periphery of the pinch roller and having an arc similar to that of the pinch roller; and a tape of the capstan. A reciprocating type cassette tape recorder comprising a second tape guide provided near the pressure contact point on the downstream side and pressing the tape in a direction away from the pinch roller.