JPH06139660A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain the magnetic recording and reproducing device having a traveling system capable of stably traveling various tapes which are different in width. CONSTITUTION:Under such constitution that the shape of a tape guide post 2 constituting the traveling system has changed from the conventional columnar shape to a conical shape, this rotary tape guide post is specified as the conical post having a larger diameter on the fixed end side of the post. By this method, since the magnetic tape 1 should travel on the side of faster tangential velocity of the post surface, a wide magnetic tape 1 and a narrow magnetic tape 4 can both stably be traveled on the fixed end side of the post.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus capable of recording / reproducing two kinds of magnetic tapes having different tape widths.

[0002]

2. Description of the Related Art Conventionally, a magnetic tape running system of a magnetic recording / reproducing apparatus is disclosed in, for example, Video Technology Handbook (p.55-p.72).
As described in Part 3, Home Video Mechanism, published by Denpa Shimbun Co., Ltd., a system in which a magnetic tape running path is regulated by a plurality of tape guide posts to stably run a magnetic tape having a specific tape width. there were.

An example of a conventional magnetic recording / reproducing apparatus will be described below with reference to the drawings. FIG. 3 is a perspective view showing a loading mechanism of a conventional magnetic recording / reproducing apparatus (VHS system M loading).

In FIG. 3, reference numeral 9 denotes a magnetic tape supply reel, around which a magnetic tape 10 having a width of 1/2 inch is wound.
Reference numerals 11 and 13 denote tape guide posts that define a traveling path of the magnetic tape, and play a role of defining a traveling path of the tape. Reference numeral 12 is an inclined post around which a magnetic tape is wound around the inclined rotating drum 16. 14 is a capstan, 1
A pinch roller 5 plays a role of running the magnetic tape at a constant speed. A magnetic head 17 is attached to the rotary drum 16, and a video signal is obliquely recorded on the tape by this head. Reference numeral 18 denotes a full-width erasing head, which plays a role of erasing information recorded on the magnetic tape during recording.

An audio head 19 records and reproduces audio on a fixed track. A control head 20 records / reproduces a control signal on / from a magnetic tape. Reference numeral 21 is a take-up reel, which functions to wind up the tape that has run. The M-loading mechanism thus constructed is designed for a system in which a 1/2 inch wide tape runs stably. Each tape guide post is cylindrical as shown in FIG.
22 is a conventional tape guide post, which has a cylindrical shape. 23 is a post stand, 24 is a wide magnetic tape,
Reference numerals 25 and 26 represent narrow magnetic tapes.

[0006]

However, in such a conventional magnetic recording / reproducing apparatus, since the tape guide post has a columnar shape and is designed so that only a tape having a certain tape width travels stably, When trying to run a narrow magnetic tape, the length of the post is too long and the tape moves up and down as shown by the arrow p on the surface of the post, which makes it impossible to run a narrow tape. Had challenges. For this reason, it is impossible to record / reproduce magnetic tapes having different tape widths with one deck.

The present invention solves the above problems, and an object of the present invention is to provide a magnetic recording / reproducing apparatus capable of stably running magnetic tapes having different tape widths.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides at least one fixed tape guide post which constitutes a magnetic tape running system for loading a magnetic tape, and a fixed end of the post. Use a fixed guide post that has a smaller post diameter at closer locations, or
By using a rotating tape guide post in which the diameter of the post becomes larger at a position closer to the fixed end of the post, at least one of the rotating tape guide posts on which the post itself rotates can be used in the same magnetic tape traveling system. Tape and the first
Both of the two types of magnetic tapes, the second magnetic tape having a different tape width from the magnetic tape of No. 2, have a configuration in which the position of the traveling path is regulated on the fixed end side of the post.

[0009]

In the fixed tape guide post according to the present invention, since the magnetic tape tries to travel on a running path as short as possible, the fixed tape guide post has a small diameter, that is, a fixed end side of the post. Drive along. Further, since the rotating tape guide post tries to travel on the side having a high tangential velocity on the surface of the post, it travels along the side where the diameter of the post is large, that is, the fixed end side of the post. As a result, when tapes having different tape widths are to be run, the running path is regulated on the fixed end side of the post regardless of the width of the tape, and a stable running system can be realized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a rotary tape guide post used in a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

In FIG. 1, 1 is a wide magnetic tape,
Reference numeral 2 denotes a rotary tape guide post that constitutes a magnetic tape running system for loading the magnetic tape 1. The rotary tape guide post is a rotary body in which the diameter of the post becomes larger toward a fixed end of the post. Is a post stand.
The post base 3 is fixed, and the rotary tape guide post 2 is adapted to freely rotate as the tape runs.

The operation of the present embodiment thus constructed will be described. First, the rotating tape guide post 2 will be described.
Has a substantially conical shape with a large diameter on the side of the post base, and therefore, when the magnetic tape 1 travels in the direction of the arrow, the tangential velocity of the surface of the post is different on both sides of the magnetic tape 1. The magnetic tape 1 is acted on by a force such that it is pressed against the post base 3, and runs along the post base 3.

This is the same even if the tape width is different, and even if the tape 4 having a narrow width is run, it always runs along the post base 3.

FIG. 2 is a view showing the fixed tape guide post of the present embodiment, 5 is a wide magnetic tape, and 6 is a fixed tape guide post which constitutes a magnetic tape running system for loading the magnetic tape 5. The fixed tape guide post of the rotating body has a smaller post diameter nearer to the fixed end of the post. Reference numeral 7 denotes a post base, and the post base 7 and the fixed tape guide post 6 are fixed, and do not rotate like the rotating tape guide post 2.

The operation of the present embodiment having the above-mentioned structure will be described. First, the fixed tape guide post 6 will be described.
Is a rotating body having a small diameter on the side of the post base and has a substantially conical shape. Therefore, when the magnetic tape 5 travels in the direction of the arrow, the magnetic tape 1 tries to travel the shortest path. Then, the vehicle runs along the post base 3. this is,
Even if the tape width is different, the same is true. Even when the narrow magnetic tape 8 is run, the tape always runs along the post base 3.

In the VHS type M loading mechanism shown in FIG. 3, a fixed tape guide post and a rotating tape guide post are used as necessary. By replacing these posts with the rotating tape guide posts and the fixed tape guide posts shown in FIGS. 1 and 2, a running system capable of running magnetic tapes having different widths can be easily obtained. The posts to be replaced may be all posts or some of them. The operation of the tape running mechanism has been described in detail in the conventional example, and will be omitted. According to the present invention, a tape traveling system capable of tape width compatibility can be obtained by making a small change only by replacing the posts of the conventional mechanism.

The present invention may be applied to not only the video signal magnetic recording / reproducing apparatus but also an audio recording apparatus such as DAT. In addition, even if two or more kinds of tapes having different tape widths can run, no problem will occur.

[0018]

As described above, according to the present invention, the fixed tape guide post is a conical post having a small diameter on the fixed end side of the post, and the rotating tape guide post has a diameter on the fixed end side of the post. By using a large inverted conical post, a traveling system capable of stably traveling two or more types of magnetic tapes having different widths can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a rotary tape guide post used in a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a fixed tape guide post of the present embodiment.

FIG. 3 is a perspective view showing a tape running system of a conventional magnetic recording / reproducing apparatus.

FIG. 4 is a perspective view showing a tape guide post used in a conventional tape running system.

[Explanation of symbols]

 1,5 Wide magnetic tape 2 Rotating tape guide post 3,7 Post stand 4,8 Narrow magnetic tape 6 Fixed tape guide post 9 Supply reel 10 1/2 inch magnetic tape 11,12,13 Tape guide post 14 Capstan 15 Pinch roller 16 Rotary drum 17 Rotary head 18 Full width erasing head 19 Voice head 20 Control head

Claims (3)

[Claims] 1. A magnetic recording / reproducing apparatus for recording / reproducing a signal by pulling out a magnetic tape contained in a cassette from the cassette and loading the magnetic tape previously pulled out to a rotary drum equipped with a magnetic head. At least one of the fixed tape guide posts constituting the magnetic tape running system for loading the magnetic tape,
By using a fixed guide post in the form of a rotating body having a smaller post diameter nearer the fixed end of the post, the tape widths of the first magnetic tape and the first magnetic tape are the same in the same tape running system. A magnetic recording / reproducing apparatus characterized in that both of two different width magnetic tapes of different second magnetic tapes regulate the position of the traveling path on the fixed end side of the post to obtain stable tape traveling. 2. A magnetic tape housed in a cassette is pulled out from the cassette, and is mounted on a rotary drum equipped with a magnetic head.
A magnetic recording / reproducing apparatus for loading / removing a magnetic tape, which has been pulled out previously, for recording / reproducing a signal, wherein at least one of rotating tape guide posts constituting a magnetic tape traveling system for loading the magnetic tape, By using a rotating tape guide post in the form of a rotating body in which the diameter of the post becomes larger toward the fixed end of the post, the first magnetic tape and the first magnetic tape are tapes in the same tape running system. A magnetic recording / reproducing apparatus characterized in that both of two types of magnetic tapes having different widths, that is, a second magnetic tape having different widths, regulate the position of the traveling path on the fixed end side of the post to obtain stable tape traveling. 3. A tape guide post having a conical shape or an inverted conical shape in which at least one of the plurality of tape guide posts constituting the tape running system has a smaller or larger post diameter at a position closer to a fixed end of the post. The tape running device characterized in that