JPS63113854A - Tape guide for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To stably run a tape in both forward and reverse directions without increasing the number of pieces of guides, by providing a turning arm to which a tape height control guide is attached, on the same shaft as that of a pinch roller, and turning the guide to a tape approach side at the time of switching the running direction. CONSTITUTION:A rotary arm 28 to which a tape height control guide 16 is attaches is provided on the same shaft as the rotary shaft 25 of a pinch roller 10. This rotary arm 28 rotates to the left when a tape runs in a forward direction, rotates to the right when the runs in a reverse direction, and is moved to the prescribed position of a tape approach side by stoppers 23a, 23b, respectively. Accordingly, the height of the tape running position can be controlled appropriately in the tape approach side, therefore, a position shift at the time of running in the forward and reverse directions is reduced, and the tape can be run stably in both forward and reverse directions without increasing the number of pieces of guides.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application] The present invention relates to a magnetic recording/reproducing device, and particularly to a tape guide suitable for stabilizing forward and reverse rotation of a tape.

[Conventional technology]

In conventional VTRs with tape reversal running function,
For example, as described in Japanese Patent Application Laid-Open No. 60-35565,
A regulation guide (hereinafter referred to as tape height guide) that regulates the height of the tape running position is installed on the tape exit side (during normal tape running) of the capstan and pinch roller (hereinafter these two may be referred to as tape drive units). (referred to as the Regulation Guide),
They were trying to stabilize tape running when the tape runs in reverse.

However, in this case, there is a problem in that the above-mentioned tape height regulating guide is newly provided, which increases the cost.

In addition, in the above-mentioned conventional technology, since the angle of the tape around the pinch roller increases, it becomes susceptible to the roundness of the pinch roller, which causes unstable running when the tape runs in reverse. It was possible.

[Problem that the invention seeks to solve]

In the above conventional technology, the number of tape height regulation guides is increased by one, and a height adjustment process is also added, which increases the overall cost. In addition, the tape wrapping around the pinch roller increases the corners, so Therefore, it is an object of the present invention to solve the problems of the prior art mentioned above and to make the tape run in the forward and reverse directions without increasing the number of height regulation guides. An object of the present invention is to provide a tape guide capable of stabilizing reverse running.

[Means for solving problems]

In order to achieve the above object, in the present invention, one tape height regulation guide is placed immediately before the tape drive unit (i.e. capstan and pinch roller) depending on the tape running direction.
It has a structure that allows it to be moved to the tape entry side). That is, a rotating arm with a tape height regulating guide installed thereon is provided, which rotates by a predetermined angle in the same direction as the rotational direction of the pinch roller.

[Effect]

The rotation axis of the rotation arm is disposed coaxially with the rotation axis of the pinch roller, and the rotation arm rotates in the same direction as the rotation of the pinch roller. A height regulation guide is placed, that is, a general VT
Taking R as an example, when the tape runs in the forward direction, the rotating arm rotates to the left, and the tape height regulation guide is disposed at a predetermined position between the capstan and the cylinder 7 immediately before the tape drive section, When the tape runs in the reverse direction, the rotating arm rotates clockwise, and the tape height regulating guide is disposed at a predetermined position between the capstan and the cassette immediately in front of the tape drive section.

As a result, the height of the tape running position can be appropriately regulated on the tape entry direction side of the tape drive unit, reducing the deviation of the tape running position during forward and reverse running, and stabilizing the tape running. It is possible to plan.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a plan view schematically showing a tape running system of a VTR equipped with a tape guide as an embodiment of the present invention, and shows a state in which a tape cassette is installed in the VTR device.

Here, the tape 1 is connected to the cylinder entry side tape height regulation guide 4. Inclined guide 5. The tape is pulled out from the tape supply reel 3 in the tape cassette 2 by the cylinder outlet height regulation guide 6 and the tilt guide 7, and is wound around the cylinder 8 at a predetermined angle. And tape 1 is capstan 9.
The tape is held between the pinch rollers 10 and driven to travel at a constant speed in the direction of the arrow, while a signal is recorded and the tape is wound up by the tape take-up reel 11J.

Further, 12 is an erasing head, 15 is an impedance roller,
14 is a head for audio and control signals, 15° 16
17 is a tension ball; 18 is a guide post for wrapping the tape 1 around the tension ball 17;
19, 20, 21, and 22 are guide bins installed in the Q7 cassette 2, respectively.

The tape guide in this embodiment is provided in a tape drive section consisting of a capstan 9 and a pinch roller 10, and the tape height regulation guide 16 is one of its components.

Now, the tape guide in this embodiment will be explained using FIGS. 1 and 3.

FIG. 1 is an explanatory view for explaining each operating state of a tape guide as an embodiment of the present invention, and is a partially enlarged view showing the tape 5 driving section in FIG. In FIG. 1, (a) shows the cassette installed state, (b) shows the forward tape running state, and (c) shows the reverse tape running state. In addition, Fig. 3 (a) is an enlarged view showing the tape guide in Fig. 1, and Fig. 3 (b) is an enlarged view of the tape guide shown in Fig. 3 (G).
-A' line sectional view.

First, the configuration of a non-embodiment will be explained with reference to FIG. 1(a) and FIG. 3.

In FIG. 1(A), 23 is a pinch roller arm that rotates around a support shaft 24, and the pinch roller 10 is provided at the tip of the arm so as to be rotatable around a support shaft 25. Also, since the cassette 2 is attached to the device,
A capstan 9 is inserted into the notch 26 of the cassette 2. Further, as described in FIG. 2, 14 is a head for audio and control signals.

Reference numerals 21 and 22 are guide bins in the cassette 2, and 27 is a control arm that controls the operation of the pinch roller arm 26. The above configuration is similar to a conventional device.

Therefore, a feature of the present invention is that a tape height regulating kite 16 is provided at the tip of a rotating arm 28 that is rotatable about a support shaft 25 to regulate the height of the tape running position. Here, the movable arm 28 is the pinch roller arm 2
Stopper 25- (a) provided at 5.

25-(b), the rotation range of which is regulated.
Next, according to FIG. 6, the pinch roller 10. And the structure of the tape height regulation guide 16 will be explained.

In FIG. 3(b), the pinch roller 10 is press-fitted into an outer ring 29(a) of a pole bearing 29 that is pivotally supported by a support shaft 25 mounted on the pinch roller arm 23. As shown in FIG. Further, 30 is a stopper for removing the pinch roller, which is press-fitted and fixed to the pinch roller 10 and rotates at the same time as the pinch roller 10. Reference numeral 31 is a felt material made of hard wool or the like, and is adhesively fixed to the upper surface of the pinch roller retainer 30. Here, the rotating arm 28-(a) supporting the upper end of the tape height regulating guide 16 is rotatably supported by the support shaft 25, and its height is regulated by being pressed against the felt material 31. Further, 32 is a compression spring that generates force for pressing the rotating arm 2B-(a) against the felt shrine 31;
33 is a stopper for removing the compression bar 51L32, and the support shaft 2
5 can be moved up and down by the threaded portion at the tip, and the force with which it is pressed against the rotation arm 28-(a) by the compression spring 321 can be adjusted as appropriate. Further, as shown in the figure, the rotating arm 2a-(b) supporting the lower end of the tape height regulation guide 16 is also rotatably supported on a support shaft 25.
A tape height regulation guide 16 is screwed into a screw hole provided at one end. In this embodiment, the tape height regulation guide 16 includes a guide roller 16-(b) rotatably supported on shafts 16-(a) and 16-(s), and a guide roller 16-(b) rotatably supported on shafts 16-(s).
6- Upper 7 langes 16-(c) press-fitted into (a)
, a lower 7-lunge 16-(d), and a screw 16-(e), and the height can be adjusted by rotating the shaft 16-(a). Further, 34 is a set screw for fixing the height of the tape height regulating guide 16. With the above configuration, the rotating arm 28-(a) rotates in the direction of rotation of the pinch roller 10 due to the frictional force of the felt material 31.

Next, the actual operation will be explained with reference to FIGS. 1(b) and 1(c).

FIG. 1(B) shows a state in which the tape 1 is running in the forward direction (in the direction indicated by the arrow in the figure), and the pinch roller 10 and the capstan 9 each rotate in the direction indicated by the arrow in the figure. Therefore, according to the above principle, the rotating arm 28-(
a) rotates in the same direction as the pinch roller 10, and as shown in the figure, a tape height regulating guide 16 is used to regulate the height of the tape running position in the direction in which the tape enters the drive section. , At this time, the rotating arm 2B-Q)) is
The rotation range of the stopper 23-(a) is regulated, and the height of the tape running position can be regulated at a predetermined position on the tape path to the extent that the tape running load does not occur.

Next, in FIG. 1 (c), the tape 1 is moved in the opposite direction (arrow B in the figure).
Pinch low 2
10. The capstans 9 each rotate in the direction of the arrow in the figure. Therefore, in this case as well, the rotating arm 28-(a) rotates in the same direction as the pinch roller 10, and as shown in the figure,
The tape height regulation guide 16 can regulate the height of the tape running position on the cassette side (the tape entry side when the tape is reversed). At this time, the rotational range of the rotation arm 2B-(b) is also restricted by the stopper 23-(a), so that the height of the tape running position can be restricted at a predetermined position.

As described above, in this embodiment, depending on the tape running direction, the tape height regulation guide 16 can be arranged on the side in which the tape enters the tape drive section, so that the tape running direction is Stabilization can be achieved. In addition, the number of tape height regulation guides before and after the tape drive unit, which conventionally required two, can be reduced by one.
Mechanical costs are lower. In addition, since the tape running height regulating guide 16 is arranged so as to wrap the tape 1 around the capstan 9 side when the tape runs in the reverse direction, it is less affected by the roundness of the pinch roller 10, and the tape runs in the reverse direction. This has the effect of improving track tracing performance during driving.

〔Effect of the invention〕

As described above, according to the present invention, when the tape runs in both forward and reverse directions, the height of the tape entering the tape drive unit can be optimally regulated by one tape height regulation guide, thereby reducing the cost of the conventional 172. , tape running in both forward and reverse directions can be stabilized.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram for explaining each operating state of a tape guide as an embodiment of the present invention, and FIG. 2 is an illustration of a tape running system of a VTR equipped with a tape guide as an embodiment of the present invention. A schematic plan view, FIG. 3(a) is an enlarged view showing the tape guide in FIG. 1, and FIG. 5(b) is an enlarged view of the tape guide in FIG.
B) is a cross-sectional view taken along the line AA'. 1... Tape 9... Capstan 10.
...Pinch roller 16...Tape height regulation guide 25...Pinch roller arm 23-(a), 25-(b)-Stopper 28-
(a), 28-(b)-- Rotating arm 29...
・Ball bearing 30... Pinch roller removal stop 31... Felt material 32... Compression spring 33.
...Prevents removal 25 ... Support shaft 34 ... Set screw 11 Fig. 4 Iko NZ +]s River tie s2- 11ii21

Claims (1)

[Claims] 1. A magnetic recording tape is held between a capstan and a pinch roller, and by the rotation of the capstan, the tape is run at a predetermined speed while rotating the pinch roller, and a signal is recorded on the tape while it is running. In a magnetic recording and reproducing device for reproducing, the pinch roller is supported coaxially with the rotating shaft of the pinch roller, is rotatable at a predetermined angle about the shaft, and regulates the height of the running position of the tape at the end of the rotation. A rotating arm with a regulation guide installed therein, and a rotating force transmitting means for transmitting the rotational force of the pinch roller to the rotating arm,
By switching the tape running direction, the regulation guide installed on the rotary arm is automatically moved and installed on the tape entry side to the capstan in synchronization with the change in the rotation direction of the pinch roller. A tape guide for a magnetic recording/reproducing device, characterized in that the tape guide is configured to