JPS59185063A - Position regulating device of tape leadout roller of rotary head type magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain miniaturization of a VTR, especially thin profile by performing regulation of position of a leadout roller by means of a position regulating pin or the like of a tape draw-out section formed incorporatedly with the leadout roller. CONSTITUTION:A loading motor 33 is turned and the tape draw-out section I approaches at first a stopper 26 along a guide groove 20 by a drive means. Then, the tape drawing-out section I is pressed into contact with the stopper 26, and the leadout roller 21 is regulated for the movement in all left/right/ forward/backward/upper/lower directions in this press contact state by conditions that a post part 16 is mated almost to a groove 42, the position regulating pin 23 is mated almost to a mu-groove of stopper projected pieces 28, 29, a projected piece 19 is mated almost to a recessed part and two smoothing faces are pressed into contact with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to a position regulating device for a tape pull-out roller of a rotary head type magnetic recording/reproducing device (VTR).

(Background) The conventional method for regulating the position of a tape pull-out roller, particularly the horizontal position and inclination, for guiding the magnetic tape into proper contact with the rotating head cylinder, is to prevent the tape from protruding from the top of the pull-out roller. This was done by fitting the rotating shaft with the stopper u iV+¥.

For this reason, the conventional tape pull-out roller position regulating device has the disadvantage that the height of the tape drawer 70 is much higher than the main body of the tape drawer 70.

This means that the height (height and thickness) of a VTR is mainly regulated by the height of the rotary hand cylinder and the height of the position regulating device of the tape pull-out roller. This was a major obstacle in achieving this goal.

An example of a conventional tape pull-out roller position regulating device is described in detail in Japanese Patent Publication No. 57-23334.

(Objective) An object of the present invention is to provide a tape pull-out roller position regulating device for a VTR that eliminates the drawbacks of the prior art described above and can further reduce the height of the tape pull-out roller position regulating device. There is something to do.

(Summary) The features of the present invention include a pull-out roller, and a host provided on the lower surface of the draw-out member base at a position substantially opposite to the pull-out roller, and whose diameter is approximately equal to that of the guide groove. a protrusion piece formed on the other side of the drawer member base; a position regulating pin implanted on the upper and lower surfaces of the protrusion piece parallel to the drawer roller; A pair of stopper protruding pieces each having a U-groove that can fit almost snugly with the upper and lower ends of the position regulating bin, and a recess that is formed on the other side of the drawer member base and that can fit almost snugly with the tip of the saw protruding piece. The point is that a stopper is provided.

Embodiment Hereinafter, a VTR having an embodiment of the tape pull-out roller position regulating device of the present invention will be described with reference to the drawings.

In FIG. 1, a cassette 1 includes a supply reel 2 and a take-up reel 3, and a magnetic tape 4 is inserted between the supply reel 2 and the take-up reel 30 via guide posts 5 and 6. It is stretched. Further, the cassette 1 has an opening recess 7 formed therein. For this purpose, the magnetic tape 4
will be stretched over the front surface of this opening recess 7.

As shown in the figure, the cassette 1 is placed at a predetermined position on the substrate 8, so the supply reel 2 in the cassette 1 fits into a supply reel stand (not shown), and the take-up reel 3, the take-up reel stand (not shown) is aligned with the LCTD.

Tape drawer sections I and (2) are for pulling out the magnetic tape 4 in the cassette 1 and winding the tape 4 around the rotary head cylinder 11 provided at an angle with respect to the substrate 8. .

Here, taking the tape drawer part ■ as an example,
The configuration will be mainly explained using figures.

On the front and back of the drawer member base 12 of the tape drawer part I,
Smooth surfaces 14 and 15 are formed, and a boss portion 16 having a diameter is formed on the smooth surface 15 side. Further, a bottle 17 is provided at the bottom of the boss portion 16.

The diameter of the boss portion 16 is approximately the same as the width T of the guide groove 20 provided on the substrate 8, excluding the middle portion. Therefore, the tape drawer part I is guided by the guide groove 20 while being guided by the guide rail at the intermediate part, and is slidable.

On the other hand, on the smooth surface 14 side of the drawer member base 12, a drawer roller 21 is installed perpendicularly thereto. This pull-out roller 21 engages with the magnetic tape 4,
This roller is used to draw out the magnetic tape 4 from inside the cassette 1, but after the drawing is completed, it becomes a guide roller that forms a running path.

Further, a protruding piece 19 having a surface 18 parallel to the smooth surface 14 is provided at the other end of the drawer member space 12.

A position regulating pin 23 is installed in this projecting piece 19 perpendicularly to the parallel surface 18, and this pin 23 is long on the parallel surface 18 side and short on the smooth surface 15 side. ing.

The above is the explanation of the tape drawer part I, but the base 13,
The tape pull-out section (2), which consists of a pull-out roller 22, a position regulating pin 24, etc., is also similar to the tape pull-out section (2), so a description thereof will be omitted.

Next, the stoppers 26 and 27 for regulating the drawer completion positions of the tape drawer parts I and II will be explained using FIGS. 6 and 7, taking the stopper 26 as an example.

The stopper 26 is fixed on the substrate 8, and has stopper protruding pieces 28 and 29 each having a U-groove, which are vertically opposed to each other. The width S of U# of these protruding pieces 28°29 is:
This diameter is approximately the same as the diameter of the nail regulating bin 23. Therefore, the pin 23 can fit snugly into the U-groove.

Further, when the tape drawer part I slides out the magnetic tape 4 as described later, the protruding piece 19 at the other end of the drawer member base 12 fits tightly. The recess 30 extends from the inclined cam surface 41a, the stopper upper surface 41b, etc. so as to be able to do so.

Further, this stopper 26 has a groove 42 having a groove width T' that is approximately the same diameter as the boss portion 16 of the tape drawer 5 section I. Therefore, when the position regulating pin 23 is fitted into the U-groove, the boss portion 16 can be perfectly fitted into the groove 42.

The stopper 26 also has a smooth surface 43 that comes into contact with the smooth surface 15 formed on the drawer member space 12 when the tape drawer section I slides out the magnetic tape 4.

Note that the stopper 27 is similar to the stopper 26, so a description thereof will be omitted.

Next, the reproduction and recording operations of the VTR will be explained.

When the cassette 1 is installed in the VTR main body as shown in FIG. 1, the pull-out roller 21,
22 and 31.1 The pinch roller 32a provided at the tip of the arm 32 and the like are inserted therein.

When the playback or recording mode is selected from this state, the loading motor 33 is first rotated, and the tape pull-out sections I and II are slid by the drive means in the directions of arrows B and C along the guide grooves 20.25. . Note that, as described above, the tape pull-out portion I slides in the middle portion of the guide groove 20 while being guided by the guide rail.

Therefore, the magnetic tape 4 is pulled out by the pull-out roller 21.2.
2 and 31, and the cassette 1 is pulled out. When the tape 4 comes into contact with the stoppers 26 and 27, respectively, the tape 4 is completely wrapped around the rotating head 1. In this state, the loading motor 33 stops rotating. However, at this time, Since the gears of the drive means of the tape drawer part I, (2) and the motor 33 are meshed with each other, the tape drawer part (2).

(2) stops in that one-stroke state without returning to its original state.

When the magnetic tape 4 is wound around the rotary head/cylinder 11 in this manner, the arm 32 is then rotated clockwise. As a result, the pinch roller 32a and the capstan 40
2, the VTR changes from the state shown in FIG. 1 to the state shown in FIG.

That is, the magnetic tape 4 fed out from the supply reel 2
The tension pin 44, the pull-out roller 31, the guide bin 34, the erasing head 35, the guide roller 36, the pull-out roller 21, the guide bin 371, the rotary head cylinder 11
, guide bin 38, pull-out roller 22, audio head 39
It passes through the capstan 40 and the like, and is wound onto the take-up reel 3.

Therefore, the pull-out rollers 21 and 22 mounted on the tape pull-out sections (1) and (H) literally serve as a pull-out row 2 for pulling out the magnetic tape 4 from the cassette 1 during tape loading. ,
The tape drawer part I.

After contacting the stoppers 26 and 27, the magnetic tape 4 serves as the tape guide row 2 for completely adhering the magnetic tape 4 around the rotary head cylinder 11. Therefore, these pull-out rollers 21, 2
It is clear that position 2 needs to be tightly regulated.

Tape drawer part 1 constituting the position regulating device. Regarding the abutment state of If and the stopper 26127, taking the abutment state of the tape drawer part I and the stopper 260 as an example, the eighth
This will be further explained using FIG.

The loading motor 33 rotates and the drive means moves the tape drawer I to the guide #20. 1], first approach the stopper 26. The boss portion 16 of the tape pull-out portion I and the guide groove 20 fit snugly into each other as described above.

Next, the tape drawer sound 1 and the Ta stopper 26 come into contact with each other.
．． It fits almost perfectly in the U groove of 29. For this purpose,
The left and right inclinations of the tape pull-out section 11, that is, the pull-out roller 21, are mainly regulated.

Also, at this time, the protruding piece 19 of the tape pull-out part I fits into the recess 30 of the stopper 26, which is made up of the inclined cam surface 41a, the stopper top surface 41b, etc., almost exactly. For this reason, the front and back positions of the tape pull-out section 1, that is, the pull-out roller 21, are mainly restricted.

Also, at this time, the groove 42 of the stopper 26 and the tape drawer part ■
The boss portion 16 fits almost perfectly. For this reason, mainly the left and right positions of the tape pull-out section (2), that is, the pull-out roller 21, are restricted.

Also, at this time, since the smooth surface 43 provided on the stopper 26 and the smooth surface 15 formed on the tape pull-out portion 11C are in contact with each other, the tape draw-out portion (■), that is, the vertical direction of the pull-out roller 21 is mainly Movement will be regulated.

That is, the boss portion 16 fits snugly into the groove 42, the position regulating pin 23 fits snugly into the U-groove of the stopper protruding piece 28, 29, and the protruding piece 19 Since the pull-out roller 21 is tightly fitted into the recess 30 and the smooth surfaces 15 and 43 are in contact with each other, movement of the pull-out roller 21 in all directions such as left and right, front and back, and up and down is restricted. That will happen.

In other words, the pull-out roller 21 is correctly positioned at a predetermined position with respect to the substrate 8.

(Effects) As is clear from the above explanation, the tape pull-out roller position regulating device of the present invention regulates the position of the pull-out roller.
Instead of using the rotating shaft protruding from the top of the drawer roller (//) as in the past, we decided to use a position regulating bin, etc. for the tape drawer 7 section that is integrally formed with the drawer 1- and the roller. .

As a result, according to the present invention, the height of the position regulating pin can be regulated without being restricted by the shape of the pull-out roller, especially its height, so that the height of the stopper is also lower than the height of the pull-out roller. can do.

Therefore, according to the present invention, since the height can be made much lower than the conventional tape pull-out roller position regulating device, there is a great effect that the VTR can be made smaller, especially thinner. .

In addition, in the present invention, as is clear from the above explanation, one pull-out roller is correctly positioned at a predetermined position, so that the magnetic tape cannot be correctly brought into close contact with the rotating head cylinder during playback or recording. Of course.

[Brief explanation of drawings]

FIGS. 1 and 2 are a plan view, a side view, a front view, and a sixth view, respectively, showing the composition of a VTR having an embodiment of the tape pull-out roller position regulating device of the present invention. 7 and 7 are a plan view and a sectional view, respectively, for explaining the structure of the stopper, and FIGS. 8 and 9 show a state in which the tape drawing part and the stopper are in contact with each other, and the tape drawing roller of the present invention is shown in FIG. FIG. 1 is a plan view and a partially sectional view showing an embodiment of a position control device. 1, II...Tape drawer part, 12.13...Drawer member space, 16...Boss part, 19 - Projection piece, 2
1.22... Pull-out roller, 23.24... Position regulating bin, 26.27... Stopper, 28.29...
Stopper protruding piece, 3o... recess, 41a... inclined cam surface, 41b... stopper top surface agent Patent attorney Michi Hiraki Jinga 1 Enga 2 Kasumiga 3 Fig. 37 Fang 4 Kasumiga 62 6 Fang 7 haze

Claims (1)

[Claims] (1) A pull-out roller installed vertically on one of the upper surfaces of the draw-out member base, and a pull-out roller provided on the lower surface of the draw-out member base at a position substantially opposite to the pull-out roller, and whose diameter is approximately equal to that of the guide roller. equal boss parts, a protruding piece formed on the other side of the drawer member base, position regulating bins planted on the upper and lower surfaces of the protruding piece parallel to the drawer roller, and fixed to a predetermined location on the substrate. , and the upper and lower ends of the position regulating bottle and the whetstone are fitted with a pair of stopper protruding pieces having a U-groove that can be perfectly fitted, and a protruding tip part of the protruding piece formed on the other of the drawer member base. 1. A position regulating bin for a tape pull-out roller of a rotating head type magnetic recording/reproducing device, characterized in that the bin is provided with a stopper having a recessed portion.