JPH06105522B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a tape recorder having a rotary head, for example
The present invention relates to a magnetic recording / reproducing apparatus for VTRs, DATs, etc., and particularly to the configuration of a capstan and a tape guide member.

2. Description of the Related Art Conventionally, in magnetic recording / 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 a magnetic tape is sandwiched between a capstan shaft and a pinch roller. It was designed to run on tape. (For example, JP-A-60-
No. 164948).

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

FIG. 2 shows an example of a conventional magnetic recording / reproducing apparatus. 1 is a magnetic tape. A supply reel 2 supplies the magnetic tape 1. Reference numeral 3 denotes a rotary drum, which is composed of a rotatable rotary head drum having a magnetic head and a fixed drum having a tape lead formed in a helical shape on an outer peripheral portion thereof. The rotary drum 3 has its rotary shaft for winding the magnetic tape 1 obliquely. Is attached diagonally to the base. 6,7
Is an inclined post, which is inclined corresponding to the magnetic tape 1 wound obliquely around the rotary drum 3 and is provided at a fixed position with respect to the rotary drum 3. Reference numerals 8 and 9 are guide rollers. Numerals 10 and 11 are bases, to which guide rollers 8 and 9 are fixed, and both load the magnetic tape 1 on both sides of the rotary drum 3 from the tape cassette and wind it around the rotary drum 3 and the inclined posts 6 and 7. The broken line in the figure shows the position before tape loading, and the solid line shows the position after tape loading. In order to shorten the transfer time of the magnetic tape 1, the two sets of guide rollers 8 and 9 and the bases 10 and 11 are configured to be movable substantially at the same time. 4,5 are stoppers which are provided at fixed positions with respect to the rotary drum 3 and regulate the moving positions of the bases 10 and 11. In such a magnetic recording / reproducing apparatus, the guide rollers 8 and 9 are required to have high rotational deflection accuracy on the magnetic tape guide surface in order to stably run the magnetic tape 1. In addition, in order to prevent the magnetic tape 1 that is wound around the rotating drum 3 from being twisted, the position and verticality of the tape are required to be accurate. It is the stoppers 4,5 and the bases 10 and 11 that maintain their accuracy with good reproducibility every time the magnetic tape 1 is transferred, and the stoppers 4,5 require shape accuracy and mounting position accuracy. Therefore, the stoppers 4 and 5 are positioned by a jig or the like. A vertical guide member 16 is movably provided and pulls out the magnetic tape 1 from the inside of the tape cassette together with the guide rollers 8 and 9 and the bases 10 and 11 to regulate the winding angle of the magnetic tape around the capstan shaft 12. 13
Is a pinch roller, and the magnetic tape 1 pulled out from the tape cassette is sandwiched between the capstan shaft 12 and the pinch roller 13, and travels by the rotational driving force of the capstan shaft 12.

However, in the above configuration, the tape loading mechanism for simultaneously moving the pair of left and right guide rollers 8 and 9 from the inside of the tape cassette to both sides of the rotary drum 3 becomes complicated. High-precision positioning of the stoppers 4 and 5 is required in two places, and two parts such as the bases 10 and 11, the stoppers 4 and 5, and the guide rollers 8 and 9 that require high shape accuracy are also required. Had problems such as.

In view of the above-mentioned problems, the present invention provides a magnetic recording / reproducing apparatus capable of saving labor in a simple tape running system, a simple loading mechanism, and position adjustment of a stopper.

Means for Solving the Problems In order to solve the above problems, a magnetic recording / 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 a magnetic tape. It is characterized in that a member that influences the traveling path of the magnetic tape is not arranged between the inclined post and the capstan shaft.

Further, a vertical guide member, which is also in contact with its side surface, is provided on a plane where both sides of the inclined post and the capstan shaft are in common contact.

Action The present invention eliminates the guide roller conventionally located between the capstan shaft and the rotary drum by the above-mentioned means, and becomes a simple tape running system. Further, when the winding post on the winding side is fixed, the magnetic tape can be wound around the rotary drum by the guide roller on the supply side and the vertical guide member for restricting the winding of the magnetic tape around the capstan shaft. The tape loading mechanism on the take-off side is unnecessary. At the same time, one set of base and stopper for fixing the guide roller is not required, and the position of the stopper can be adjusted in only one place. Further, the vertical guide member is formed at a position where the inclined post on the take-up side and both side surfaces of the capstan shaft are in common contact with each other on the side surface, that is, the tape running path formed by the inclined post and the capstan shaft. By installing it on the extension of, the pinch roller is separated from the capstan shaft, and the driving path of the magnetic tape does not change even in modes such as fast-forwarding where the driving force is not transmitted to the magnetic tape. No stable driving is obtained.

Embodiment A magnetic recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing the structure of a magnetic recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, 1 is a magnetic tape. A supply reel 2 supplies the magnetic tape 1. Reference numeral 3 denotes a rotary drum, which comprises a rotatable rotary head drum having a magnetic head and a fixed drum having a tape lead formed in a helical shape on the outer peripheral portion. The rotating drum 3 has its rotation shaft obliquely attached to the base in order to wind the magnetic tape 1 obliquely. Reference numeral 7 is an inclined post on the take-up side, which is a magnetic tape 1 obliquely wound around the rotary drum 3.
Corresponding to, and is provided at a fixed position with respect to the rotating drum 3. Reference numeral 8 is a guide roller. Reference numeral 6 denotes an inclined post on the supply side, which is provided so as to be inclined 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 moved to the left side of the rotating drum 3 from the inside of the tape cassette so that the magnetic tape 1 is attached to the rotating drum 3 and the winding side inclined post 7. Wrap around. A stopper 4 is provided at a fixed position with respect to the rotary drum 3, and regulates the moving position of the base 10. Reference numeral 12 denotes a capstan shaft, which is fixed together with the inclined post 7 at a predetermined position so that the magnetic tape 1 wound around the rotating drum 3 while being inclined can travel without being twisted. That is, the position of the inclined post 7, the inclination angle and direction of the magnetic tape 1 and the winding angle of the magnetic tape 1 are determined by the positions of the rotary drum 3 and the capstan shaft 12 so that the magnetic tape 1 is not twisted. . 13 is a pinch roller. Reference numeral 16 is a movable vertical guide member that regulates the angle at which the magnetic tape is wrapped around the capstan shaft 12. In the present embodiment, the vertical guide member 16 is formed at a position where both side surfaces of the inclined post 7 and the capstan shaft 12 are commonly in contact with each other, that is, a position where the inclined post 7 and the capstan shaft 12 are in contact with each other. It is provided at a position having a tangent line on the extension of the tape running path.

Base 10, guide roller 8, inclined post 6, vertical guide member 1
The magnetic tape 1 pulled out from the tape cassette by the movement of 6 is wound around the rotary drum 3 and the winding-side inclined 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, if you operate a switch (not shown), the magnetic tape 1 will move to the capstan shaft.
12 and the pinch roller 13 pinch the capstan shaft 12
It is driven by the rotational driving force of. As is clear from the drawing, the guide roller for pulling out the magnetic tape 1 from the tape cassette is only the guide roller 8 fixed on the base 10, and only one mechanism is required to move it. Since only one stopper 4 is required for precise positioning, assembly becomes easy. Further, by eliminating the guide roller on the winding side, a simple tape running system with a small number of magnetic tape guide members is provided.
Since the inclined post 7 and the capstan shaft 12 on the winding side are fixed to the rotating drum 3 with high accuracy, the magnetic tape 1 is not twisted, and a guide for preventing the magnetic tape from being twisted as in the conventional case. There are also fewer parts to be adjusted. It is also possible to reduce the cost by reducing the expensive mechanical parts as described above.

Further, even when the magnetic tape 1 is separated from the capstan shaft 12 in a mode such as fast-forwarding in which the pinch roller 13 is separated from the capstan shaft 12, the tape running path may change and the magnetic tape 1 may be twisted, the vertical guide member 16 may be used. Inclined post 7
Since the magnetic tape 1 can be run without being twisted by providing it at a position having a tangent to the magnetic tape 1 on an extension line of the tape running direction formed by the capstan shaft 12 and the capstan shaft 12, recording on the magnetic tape 1 at the time of fast-forwarding etc. It is possible to read the generated signal and prevent damage due to the twist of the magnetic tape 1.

EFFECTS OF THE INVENTION As described above, according to the present invention, the magnetic tape is disposed between the capstan shaft and the inclined post that is disposed between the rotary drum and the capstan and is inclined at a predetermined angle with respect to the magnetic tape. By eliminating the member that affects the traveling route, one guide roller on the winding side, which was required in the past, is no longer necessary, and the mechanism for moving the base, the base, and the stopper are also eliminated. You can Therefore, the tape running system is simple, the number of parts can be reduced, and the assembly is facilitated, so that the cost can be reduced.

Furthermore, by providing a vertical guide member at a position that has a tangent on the plane contacting both sides of the inclined post and the capstan shaft, the magnetic tape wrapped around the rotating drum can be used even in the fast-forward mode where the pinch roller is separated from the capstan shaft. Since the twisting does not occur, the signal recorded on the magnetic tape can be read, and the damage due to the twisting of the magnetic tape can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view showing the structure 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 ... Inclined post, 8,9 ... Guide roller, 10,1
1 …… Base, 12 …… Capstan shaft, 13 …… Pinch roller, 16 …… Vertical guide member.

Claims (2)

[Claims] 1. A rotary drum having a magnetic head, a drive device for driving the magnetic tape by sandwiching the magnetic tape between a capstan shaft and a pinch roller, and a magnetic tape arranged between the rotary drum and the capstan shaft. A tilted post that is tilted at a predetermined angle with respect to, and a member that affects the traveling path of the magnetic tape is not disposed between the tilted post and the capstan shaft. 2. A magnetic recording medium as set forth in claim 1, wherein a vertical guide member, which is also in contact with its side surface, is provided on a plane where both side surfaces of the inclined post and the capstan shaft are in common contact with each other. Playback device.