JPS6050650A - Travelling device of tape-like medium - Google Patents

Abstract

PURPOSE:To mprove the positioning accuracy of a tape width direction by constituting a tape guide of a wall member having a surface curved in the tape travelling direction, and a supporting member abutted on one end surface of the tape and regulating the position in the tape width direction. CONSTITUTION:The tape 22 contacts the curved surface 15e of the tape guide 15 and receives force pushing the tape 22 downwards because the wall member 15d constituting the curved surface 15e is inclined inside by a slight angle of about 0.3-4 deg. from the axial direction l of the guide pin 25, so that the lower end of the tape 22 is pressed to the upper surface of the supporting member 15c. Since the tape 22 contacing the curved surface 15e increases the rigidity of the width direction apparently larger than that of the tape material itself by the contact, the end surface of the tape 22 is surely regulated by the upper surface of the supporting member 15c without being curled. Consequently, the positioning accuracy in the tape width direction at the recording and reproducing time are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape-like medium traveling device, and more particularly to a tape-like medium traveling device in which a tape guide in a cassette-type tape recorder for magnetically recording and reproducing digital signals, analog signals, etc. is improved.

As a tape guide for a conventional tape-like medium transport device, one shown in FIG. 1 is known.

The tape guide shown in FIG. 1 has a wall member 3 between upper and lower support members 112, and a tape 4 having a magnetic recording surface is
The tape runs while contacting the curved surface 3a of the wall member 3, and the upper and lower ends of the tape abut against the lower surface 1a of the upper support member 1 or the upper surface 2a of the lower support member 2, thereby regulating the position in the width direction. . And the upper and lower support members 1.2
The side parts 1b and 2b protrude from the outer peripheral surface of the wall member 3, and the running tape 4 is first guided onto the curved surface 3a of the wall member 30 with its upper and lower ends regulated between the upper and lower support members 1.2. , after leaving the curved surface 3a, it is sent out while being regulated by the support member 1.2. Of course, the edges 1c and 2c of the support member 1.2 are chamfered in an R-shape or a tapered shape to ensure smooth running of the tape 40.
Damage to the tape 4 is also prevented. Although not shown, the tape 4 is guided to the curved surface of the wall member at approximately the same time that the upper and lower ends are regulated, and the upper and lower ends are released from the regulation at the same time as the tape leaves the curved surface. There are some things.

However, in the conventional example described above, since both the upper end and the lower end of the tape 4 are positionally regulated by the support member 1.2, variations in the dimensions between the support members 1.2 or from the upper end of the tape 4 may occur. Due to variations in the distance (that is, width) to the bottom edge, neither the top nor bottom edge of the tape may come into contact with the support member 1.2, resulting in incomplete regulation of the tape position. Both sides are strongly pressed against the support member 1.2, which causes the tape to run overlapping each other, and the tape curls, resulting in poor head touch.

Further, in the conventional example described above, even at a position away from the curved surface 3a of the wall member 30, the tape 4 is regulated in the width direction by the upper and lower support members 1.2.

In other words, a force in the width direction is applied to the portion of the tape 4 which has almost no rigidity in the width direction because it is not in contact with the curved surface 3a, so the tape 4 tends to bend freely, causing so-called tape curling. In addition to causing this phenomenon, the positioning effect of the support member 1.2 is also reduced. Such a curl phenomenon also occurs when the tape is guided to the curved surface of the wall member at the same time as the upper and lower ends of the tape are restricted.

In addition, since the curved surface 3a of the wall member 3 that makes surface contact with the tape 4 has a relatively short length in the tape running direction, it applies a strong pressing force to only a part of the tape 4, which may cause damage to the tape. Become.

The present invention has been made in view of the above-mentioned points, and it is possible to accurately position the tape in the width direction, and prevent damage to the tape.
The purpose of the present invention is to provide a tape-like medium running device that prevents curling, etc., and has a structure that includes a wall member that contacts the tape surface and has a curved surface with respect to the tape running direction, and a wall member that contacts one end surface of the tape and has a tape width. A tape guide is constituted by a supporting member that regulates the position of the tape guide, and the tape guide is disposed on the upstream side and downstream side of the tape guide in the tape running direction, and the tape is brought into contact with the wall member of the tape guide. The axial direction of the curved surface of the wall member is tilted at a slight angle with respect to the axial direction of the guide surfaces, which are parallel to each other, of the guide portions to be guided, so that the wall member is brought into contact with the support member, which is the end surface of the tape, by tape tension. It is something.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a plan view showing the relationship between a tape cassette and a tape traveling device in an embodiment of the present invention, and FIG. 3 is a front view thereof.

In the figure, a head stand 12 is mounted on a chassis 11 so as to be movable back and forth.
A recording/reproducing head 13, an erasing head 14, a tape guide 15, a head mount 16, and a head block mount 17 are provided. The head blower mounting base 17 is a plate-like member fixed to a support 18 erected on the head base 12 with screws 19, and has three adjustment screws 20.2 in the center.
0.20, and the head mounting base 16, which has an angular cross section, is fixed to the tip of the adjusting screw 20.20°20 via a spring 21, 21, 21.

The head 13 is fixed to the inner wall of the head mount 16, and the erasing head 1 is directly fixed to the head mount 12.
4 and the head 13 are arranged in parallel.

Further, the tape guide 15 is made of an elongated plate-like member,
The bottom part 15a is fixed to the head stand 12 with screws,
The bottom portion 15a has standing portions 15b near both ends.

This upright portion 15b includes a support member 15C consisting of a horizontal stepped portion and a wall member 15d that stands up from the support member 15c.
The upper surface of 5C regulates the position of the tape in the width direction.

Furthermore, on the chassis 11 there is a pinch 1:l similar to the conventional device.
-, F23 and capstan 24 are attached and swung, and the three pinch rollers 23, 3 between the capstan 24 and the head 13 are placed on the side where the pinch roller 23 and capstan 24 are not located, with the reproducing head 13 in between. A guide bin 25 is installed for each of the three. Three guide bins 25 are arranged symmetrically about the head 13.

Note that the tape cassette 26 is indicated by a dashed line, and includes a first hub (not shown) that fits into a take-up reel shaft (not shown) of the traveling device, and a supply reel shaft (not shown) K@ A second hub (not shown) that fits together with the tape 2 wound around it.
2 and a pad 29 for pressing the tape 22 against the header 3 (the wound portions are indicated by 27 and 28).

FIG. 4 is an enlarged perspective view of only the upright portion 15b of the tape guide in FIG. 2.3, and FIG.
5b is a side view of FIG.

As shown in the figure, with respect to the tape running direction indicated by the arrow,
The length of the wall member 15d is longer than the length of the support member 15c, and a curved surface 15e of the wall member 15d extends further on both sides in the running direction from the chamfered portion 15f of the edge of the support member 15c.
The tape 22 comes into contact with. The wall members 15d are respectively disposed on the upstream side and the downstream side of the tape guide 15 in the tape running direction, and the wall members 15d are disposed on the upstream side and downstream side of the tape guide 15 in the tape running direction.
0.3 to 4 with respect to the mutually parallel axial direction of the guide portions that guide the tape 22 so as to contact the wall member 15d, that is, the axial direction of the guide bin 25/(vertical direction in FIG. 25). It is tilted inward at a small angle θ of about 100 degrees.

Next, the operation of the tape guide 15 will be explained.

Now, when recording on the tape 22 or when reproducing a signal recorded from the tape 22, the tape 22 is driven by the tape drive mechanism having the tape winding shaft, the tape supply shaft, the capstan 24, and the pinch roller 23. However, the head 13 is brought into contact with the tape 22. At this time, the tape 22 is moved to the tape guide 15 as described above.
The wall member 15d constituting the curved surface 15e is in contact with the curved surface 15e, and the wall member 15d that forms the curved surface 15e is 0.0.
Since it is slightly inclined inward at a J-angle of about 3 to 4 degrees, it receives a downward force, and the lower end of the tape 22 is pressed against the upper surface of the support member 15c.

The tape 22 in contact with the curved surface 15e is apparently larger in the width direction than the tape material itself due to this contact, so the end surface is not curled by the upper surface of the support member 15c. accurately regulated. This state is the same near both side edges of the support member 15C, and since the tape 22 comes into contact with the curved surface 15e extending further in the tape longitudinal direction from both sides of the support member 15c, no curling occurs in this part. .

According to experiments, chibutensilan has a concentration of 30 to 40 [
:g], in order to position the end surface of the tape 22 on the upper surface of the support member 15c, the pressing force must be 1 to 2 [g].
It was confirmed that this is necessary.

To this end, it is desirable that the inclination angle of the wall member 15d be approximately 0.3 to 4 degrees as described above.

Further, in the present embodiment, the length in the longitudinal direction of the curved surface 15e of the wall part 15d, that is, the length of the curved surface 15e with which the tape 22 contacts
By setting the length to the tape width of 3.8 mm or more, the pressing force in the tape width direction received from the support member 15c is dispersed in the tape longitudinal direction, further preventing the tape from curling. Further, the six guide bins 25 on the left and right sides narrow the gap between the head 13 and the tape 22 to improve head touch.

6, (al, and 7) show a modification of the embodiment of the present invention, in which the support member 15C is disposed on the upper end side of the tape 22 as shown in FIG. 6, and the slope of the wall member 15d is It is also possible to apply an upward pressing force to the tape 22.
As shown in the figure, a tape regulating member 3 is placed on the opposite side of the supporting member 15C.
0 may be added.

In this case, the tape regulating member 30 is configured such that when the tape stops running,
When sufficient tension is not applied to the tape, such as during fast forwarding or rewinding, the tape 22 may be accidentally pulled into the tape guide 1.
This is to prevent deviation from the 5th grade, and records,
During normal running such as playback, the end surface of the tape does not come into contact with the tape regulating member 30.

Further, in the above embodiment, the support member 15c and the wall member 15d are shown as an integrally formed tape guide 15, but they can also be formed separately.

In short, it is sufficient that there is a support member for receiving the upper or lower end surface of the tape inside the width of the wall member having a curved surface in the tape running direction. Further, the guide bin 25 is not limited to a cylindrical shape, but may be a rectangular shape having a circular shape or a curved surface at the entrance/exit portion of the tape.

It is also possible to use a cross-sectional shape such as a semicircle.

In the above embodiment, the tape 22 in the tape guide 15
Although the entire portion where the surface comes into contact, ie, the portion indicated by the reference numeral 15e, is a curved surface, the portion may be a curved surface that includes a flat surface approximately at its center as shown in FIG. Further, in the above embodiment, the supporting part 15 for the wall member 15d is
Although the angle of the plane c is less than 90°, even if this angle is 90° or more, the end face of the tape 22 does not touch the supporting part 1.
'15 It is sufficient as long as it does not slip down from C.

Note that a guide bin may be provided in the tape cassette 26 instead of the guide bin 25, but the curved surface 15 of the tape guide 15
To accurately maintain the angle with respect to e, use the guide bin 25.
It is preferable to use one installed in the chassis, such as (
- Yes.

The present invention is as described above, and includes a tape drive mechanism having a tape winding shaft, a tape supply shaft, a carburetor tongue, and a vinyl roller, a head, and a tape guide. The tape guide is constituted by a wall member having a curved surface that is curved against the tape, and a support member that contacts one end surface of the tape and regulates the position in the tape width direction, and the tape guide has an upstream side and a downstream side in the tape running direction. The axial direction of the curved surface of the wall member is slightly parallel to the axial direction of the guide parts, which are parallel to each other and guide the tape so as to bring the tape into contact with the wall member of the tape guide. The tape is tilted at an angle, and the tape end surface is brought into contact with the support member by tape tension.

Therefore, the positioning accuracy in the width direction of the tape during recording and reproduction can be improved, tape waving can be suppressed, and the tape track can be accurately aligned with the head. Therefore, it is particularly effective not only for analog tape recorders but also for digital tape recorders with extremely small track widths. In addition, it is possible to simultaneously prevent damage and curling of the tape, allowing highly accurate recording and playback.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the main parts of a conventional tape guide;
3 is a front view of the tape-like medium traveling device shown in FIG. 2, and FIG. 4 is a perspective view of essential parts of the tape guide according to the embodiment of the present invention. , FIG. 5 is a side view of the main part of the tape guide according to the embodiment of the present invention,
Fig. 6 shows a further embodiment of the present invention, Fig. 6(a) is a perspective view of the main part of the tape guide, Fig. 6(b) is a side view of the main part of the tape guide, and Fig. 7 is a main part of the tape guide. FIG. 7 is a perspective view of a tape guide in still another embodiment of the invention. 13...head, 15...tape guide, 15C...support member, 15d...
Wall member, 1.5 e...Curved surface, 22...
・Tape, 23...Pinch low 2.24...
... Capstan, 25 ... Guide bottle, l
...Axis direction of the guide bin. Figure 1 Figure 4 Figure 5 Figure 5c Figure 2 Figure 3 Figure 6 (a) Figure 7 d '7゜㉟ (b) 〉θ← Ae

Claims (5)

[Claims] (1) A tape drive mechanism having a tape winding shaft, a tape supply shaft, a carburetor tongue, and a pinch roller, and a head;
In a tape-shaped medium running device comprising a tape guide, a wall member that contacts the tape surface and has a curved surface with respect to the tape running direction, and a support member that contacts one end surface of the tape and regulates the position of the tape in the width direction. constitute the tape guide, and are arranged parallel to each other on the upstream and downstream sides of the tape guide in the tape running direction, and guide the tape so as to bring the tape into contact with the wall member of the tape guide. A tape-shaped medium traveling device characterized in that the axial direction of the curved surface of the wall member is made at a small angle with respect to the axial direction of the guide surface, and the tape end surface is brought into contact with a supporting member by tape tension. (2) The tape-shaped medium traveling according to claim (1), wherein the angle of inclination between the axial direction of the curved surface of the wall member and the axial direction of the guide portion is 0.3 to 4 degrees. Device. (3) The tape-shaped medium traveling device according to claim (1) or (2), wherein the wall member and the support member are integrally constructed. (4) In the tape running direction, the length of the portion where the curved surface of the wall member and the tape surface come in contact with each other is greater than the length of the portion of the support member that contacts the end surface of the tape. The tape-shaped medium traveling device according to item (3). (5) A guide bin is disposed between the head and the tape guide, the guide bin being in contact with the tape surface and having an axis parallel to the axial direction of the capstan.
The tape-shaped medium traveling device according to any one of items 1) to (4).