JPH01179265A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain a simple tape traveling system by arranging a slant post slanting by a prescribed angle between a rotary drum and a capstan shaft and eliminating any members, which influence the tape traveling, between this post and the capstan shaft. CONSTITUTION:A magnetic tape 1 is pinched between the capstan shaft 12 and a pinch roll 13 and traveled by the driving force of the shaft 12. As far as guide rollers for drawing the tape 1 out of a tape cassette are concerned, the only requirement is a guide roll 8 fixed on a base 10, and hence one mechanism for moving this is enough. A stopper 4 needing its precise positioning is also only one, so that the assembly is able to be facilitated. Since a guide roll on the take-up side is abolished, a simple tape traveling system consisting of a few tape guide members is established. The slant post 7 and the capstan shaft 12 are fixed in high accuracy, and no distortion of the tape 1 takes place, while adjustments of the guide members are diminished to a min., thus reducing the cost by reducing the number of expensive mechanism components.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing device T1 such as a tape recorder such as a VTR or DAT having a rotary head, particularly to the structure of a capstan and a tape guide member.

Conventional technology Conventionally, in magnetic recording and reproducing devices such as VTRs and DATs, a magnetic tape is pulled out from a tape cassette by a pair of left and right guide rollers, wound around a predetermined position on a rotating drum, and the magnetic tape is held between a capstan shaft and a pinch roller. It was configured to run the tape. (For example, JP-A-60-164948).

An example of the above-mentioned conventional magnetic recording/reproducing device will be described below with reference to the drawings.

FIG. 2 shows an example of a conventional magnetic recording/reproducing device. 1 is a magnetic tape. A supply reel 2 supplies the magnetic tape 1. Reference numeral 3 denotes a rotating drum, which consists of a rotatable rotary head drum having a magnetic head and a fixed drum having a helical tape lead formed on its outer periphery. The rotating shaft of the rotating drum 3 is attached obliquely to the base in order to wind the magnetic tape 1 obliquely. Reference numeral 6°7 denotes an inclined post, which is inclined in correspondence with the magnetic tape l wound diagonally around the rotating drum 3, and is provided at a fixed position with respect to the rotating drum 3. 8°9 is a guide roller. 10.11 is a base to which guide rollers 8.9 are fixed, both of which load the magnetic tape 1 from inside the tape cassette onto both sides of the rotating drum 3 and wrap it around the rotating drum 3 and the inclined post 6.7. The dashed line indicates the position before tape loading, and the solid line indicates the position after tape loading.In order to shorten the transfer time of magnetic tape 1,
The set of guide rollers 8.9 and base 10.degree. 11 are configured to be movable substantially simultaneously. Reference numeral 4.5 denotes a stopper, which is provided at a fixed position with respect to the rotating drum 3 and restricts the movement position of the base 10.11. In such a magnetic recording and reproducing apparatus, the guide rollers 8 and 9 require high rotational runout accuracy on their magnetic tape guide surfaces in order to run the magnetic tape 1 stably. In addition, positional and perpendicularity accuracy is required to prevent twisting of the magnetic tape 1 that is wound around the rotating drum 3 at an angle. The stopper 4.5 and the base 10.11 maintain this accuracy with good reproducibility each time the magnetic tape 1 is transferred.
The stopper 4.5 requires shape accuracy and mounting position accuracy.

For this reason, the stopper 4.5 is positioned using a jig or the like. Reference numeral 16 designates a movably provided vertical guide member which, together with a guide roller 8.9 and a base 10°11, pulls out the magnetic tape l from inside the tape cassette and guides the capstan shaft 12.
Regulates the angle at which the magnetic tape wraps around. 13 is a pinch roller that pinches the magnetic tape 1 pulled out from the tape cassette.
is sandwiched between a capstan shaft 12 and a pinch roller 13, and is driven by the rotational driving force of the capstan shaft 12.

Problems to be Solved by the Invention However, in the above configuration, is there a tape loading mechanism for simultaneously moving the pair of left and right guide rollers 8 and 9 from inside the tape cassette to both sides of the rotating drum 3? 311 is complicated, two highly accurate positioning stops (4.5) are required, and the base 10
．． 11, a stopper 4.5, and a guide roller 8.9, which require two parts each requiring high shape accuracy, were also problematic.

In view of the above problems, the present invention has a simple tape running system, a simple loading mechanism, and a stopper.
The present invention provides a magnetic recording/reproducing device that can save labor during setup.

Means for Solving the Problems In order to solve the above problems, the magnetic recording and reproducing apparatus of the present invention is arranged between a rotating drum and a capstan shaft, and is tilted at a predetermined angle with respect to the magnetic tape. The magnetic tape is characterized in that no member that affects the travel path of the magnetic tape is disposed between the tilted post and the capstan shaft.

Further, a vertical guide member is provided on a plane where both side surfaces of the inclined post and the capstan shaft commonly touch, and whose side surfaces also touch.

Function: The present invention uses the above-described means to eliminate the guide roller that was conventionally located between the capstan shaft and the rotating drum, resulting in a simple tape running system. In addition, when the inclined post on the take-up side is fixed, the magnetic tape can be wound around the rotating drum using the guide roller on the supply side and the vertical guide member that restricts the winding of the magnetic tape around the shaft. , there is no need for a tape loading mechanism on the winding side. At the same time, one set of base and stopper for fixing the guide roller is no longer required, and the position of the stopper only needs to be adjusted in one place. Furthermore, the vertical guide member is placed at a position where the side surface of the tilted post on the winding side and the capstan shaft are in common contact with each other. By installing the pinch roller on an extension of the tape running path, the pinch roller separates from the capstan shaft and the running path of the magnetic tape does not change even in modes such as fast forwarding where driving force is not transmitted to the magnetic tape. Stable running without twisting of the tape can be achieved.

Embodiment Below, a magnetic recording and reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing the configuration of a magnetic recording/reproducing apparatus according to an embodiment of the present invention. In FIG. 1, l is a magnetic tape. A supply reel 2 supplies the magnetic tape 1. Reference numeral 3 denotes a rotating drum, which consists of a rotatable rotating head drum having a magnetic head and a fixed drum having a helical tape lead formed on its outer periphery. The rotating shaft of the rotating drum 3 is attached obliquely to the base in order to wind the magnetic tape 1 obliquely. 7 is an inclined post on the winding side, and the magnetic tape 1 is wound diagonally around the rotating drum 3.
It is inclined correspondingly to the rotary drum 3 and is provided at a fixed position with respect to the rotating drum 3. 8 is a guide roller. Reference numeral 6 denotes a tilted post on the supply side, which is tilted at a predetermined angle with respect to the magnetic tape 1. Reference numeral 10 denotes a movable base to which a guide roller 8 and an inclined post 6 are fixed, and the magnetic tape 1 is rotated by moving it from inside the tape cassette to the left side of the rotating drum 3. Wrap it around 7. A stopper 4 is provided at a fixed position with respect to the rotating drum 3, and restricts the movement position of the base 10. Reference numeral 12 denotes a capstan shaft, which is fixed at a predetermined position together with the inclined post 7 so that the magnetic tape 1 wound on the rotating drum 3 at an angle can run without twisting. In other words, the position of the inclined post 7, the angle and direction of inclination with respect to the magnetic tape 1, and the winding angle of the magnetic tape 1 are determined by the positions of the rotating drum 3 and the capstan shaft 12 so that the magnetic tape l is not twisted. ing. I3 is a pinch roller. A movable vertical guide member 16 regulates the angle at which the magnetic tape is wound around the capstan shaft 12. In this embodiment, the vertical guide member 16 is formed at a position where the inclined post 7 and the capstan shaft 12 are in contact with a plane in which both side surfaces of the inclined post 7 and the capstan shaft 12 are in common contact. The tape is provided at a position that is tangential to the extension of the tape running path.

Base 10. The magnetic tape 1 is pulled out from the tape sheath by the movement of the vertical guide member 16 around the guide rollers 8, 1 and the oblique post 6°, and is wound around the rotating drum 3 and the take-up side oblique post 7. The broken line in the figure shows the position before tape loading, and the solid line shows the position after tape loading. After that, by operating a switch (not shown), the magnetic tape 1 is pinched between the capstan shaft 12 and the pinch roller 13.
It travels by the rotational driving force of the capstan shaft 12.

As is clear from the drawing, magnetic tape 1 is placed in tape cassette 2.
The only guide roller that can be pulled out from the top is the guide roller 8 fixed on the heath lO, and only one mechanism is required to move it. Stopper 4 that requires precise positioning is also 1
This makes assembly easier. Furthermore, by eliminating the guide roller on the winding side, the tape running system becomes simple with fewer magnetic tape guide members. Since the inclined post 7 and the capstan shaft 12 on the winding side are fixed to the rotating drum 3 with high precision, the magnetic tape 1 does not twist, and this guide prevents the twisting of the magnetic tape as in the conventional case. There are also fewer parts to adjust. It is also possible to reduce costs by reducing the number of expensive mechanical parts as described above.

Furthermore, in a mode such as rapid forwarding in which the pinch roller 13 is separated from the capstan shaft 12, the magnetic tape 1 is moved to the capstan shaft 12.
Even in the case where the magnetic tape 1 may be twisted due to a change in the tape running path away from the vertical guide member 16, the magnetic tape 1 and By providing the magnetic tape 1 at a position having a tangent line, the magnetic tape 1 is prevented from being repelled (
Since it can run, signals recorded on the magnetic tape l can be read out during fast forwarding, and damage to the magnetic tape l due to twisting can also be prevented.

Effects of the Invention As described above, the present invention provides a magnetic tape transfer between a tilted post which is disposed between a rotating drum and a capstan and is tilted at a predetermined angle with respect to the magnetic tape, and a capstan shaft. By configuring it so that no members that affect the running path are placed, one guide roller on the take-up side, which was conventionally necessary, is no longer required, and the mechanism for moving the base, base, and one set of stoppers are also eliminated accordingly. Can be done. Therefore, the tape running system is simple, the number of parts can be reduced, and assembly is easy, so costs can be reduced.

Furthermore, by providing a vertical guide member at a position that is tangential to the plane that touches both sides of the inclined post and the capstan shaft, the magnetic tape wrapped around the rotating drum can be easily controlled even in modes such as fast forwarding where the pinch roller is separated from the capstan shaft. Since no twisting occurs, signals recorded on the magnetic tape can be read out, and damage to the magnetic tape due to twisting can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of an embodiment of the present invention, and FIG. 2 is a plan view showing a conventional magnetic recording/reproducing apparatus. 1... Magnetic tape, 3... Rotating drum, 4, 5... Stopper, 6, 7...
Around 1, oblique post, 8, 9... Guide roller, 10
．． 11...Base, 12...Capstan shaft, 13...Pinch roller, 16...
...Vertical guide member. Name of agent: Patent attorney Toshio Nakao Hakaichi Meika 1 Figure 2

Claims (2)

[Claims] (1) A rotating drum with a magnetic head, a drive device that pinches and drives the magnetic tape between a capstan shaft and a pinch roller, and a drive device that is placed between the rotating drum and the capstan shaft and is connected to the magnetic tape. What is claimed is: 1. A magnetic recording and reproducing apparatus comprising: a tilted post tilted at a predetermined angle; and no member that influences the travel path of the magnetic tape is disposed between the tilted post and a capstan shaft. (2) A magnetic recording and reproducing device according to claim (1), characterized in that a vertical guide member is provided on a plane where both side surfaces of the inclined post and the capstan shaft are in common contact with each other, and whose side surfaces are also in contact with each other. .