JP2512763Y2 - Magnetic recording / reproducing device - Google Patents

Description

[Detailed description of the device] [Industrial application] This device is a digital audio tape recorder,
The present invention relates to a magnetic recording / reproducing device for recording / reproducing information on / from a magnetic tape such as a video tape recorder, and more particularly to a device using a flangeless cassette as a tape cassette.

[Conventional technology]

FIG. 6 is a plan view of a conventional magnetic recording / reproducing apparatus. In FIG. 6, (1) is a rotary head assembly, and as is well known, a fixed cylinder, a rotary cylinder rotatably supported by the fixed cylinder, and the rotary cylinder. The magnetic head is supported by the magnetic head and is rotated around a predetermined rotation axis (rotation axis of the rotation cylinder) by rotation of the rotation cylinder. A spiral lead groove is formed on the outer peripheral surface of the fixed cylinder, and the magnetic tape (2) is guided along the lead groove in a spiral shape, and the lower position of the magnetic tape (2) is guided by the lead groove. It is becoming regulated.
(3) is a supply-side tape guide having an inclined pin for controlling the vertical position of the magnetic tape (2) and changing the direction of the magnetic tape (2) to spirally wind it around the rotating head assembly (1). , (4) has an inclined pin for returning the direction of the magnetic tape (2) spirally wound around the rotary head assembly (1), and controls the vertical position of the magnetic tape (2). The take-up tape guide body (5) accommodates the magnetic tape (2) and the outlet (50) of the magnetic tape (2).
A flangeless cassette having 1) and (502), (6) a capstan, (7) a pinch roller, (8),
Reference numerals (9), (10), and (11) denote rotating or fixed guide posts, and (12) denotes a tension pin.

The flangeless cassette (5) has the structure shown in FIG. 8, and the magnetic tape (2) is wound around the winding core (13) to move the magnetic tape (2) in the flangeless cassette (5) up and down. The regulation is performed by the slip sheet (14).
Although the slip sheet (14) has a weak regulation force for the vertical movement of the magnetic tape (2), the cassette is thin because there is no flange, and therefore, the tendency to put it into practical use has become stronger recently.

Next, the operation will be described. The magnetic tape (2) is pulled out from the flangeless cassette (5), the supply side tape guide body (3) is hooked on the winding side tape guide body (4), and is wound around the rotary head assembly (1). Then, the rotating cylinder is rotated to record information on the magnetic tape (2) by the magnetic head or reproduce the already recorded information. For rewinding and fast-forwarding the magnetic tape (2), the magnetic tape (2) is once housed in the flangeless cassette (5), and when this is completed, the magnetic tape (2) is pulled out again and the rotary head assembly (1) is pulled out. ) Around.

During the recording / reproducing of information, the magnetic tape (2) is restricted from moving up and down by the lead grooves of the rotary head assembly (1) and the tape guides (3) and (4) on the supply side and the winding side. The track (2) and the magnetic head are designed so that no track shift occurs. Thus, the guide posts (10), which are remote from the rotating head assembly (1),
(11) is straight as shown in FIG.
It is used exclusively to regulate the running path of the magnetic tape (2).

[Problems to be solved by the invention]

The conventional magnetic recording / reproducing apparatus is configured as described above. For rewinding and fast-forwarding of the magnetic tape, the magnetic tape (2) is once housed in the flangeless cassette (5), and then the magnetic tape (2) is again loaded. Since it is a procedure of pulling it out from the flangeless cassette (5) and winding it around the rotary head assembly (1), there is a problem that it takes time to operate. In order to avoid this, it is conceivable that the magnetic tape (2) is not stored in the flangeless cassette (5) but is fast-forwarded or rewound while being wound around the rotary head assembly (1). Since the magnetic tape (2) is still pulled out on the normal road, the road length is large,
Moreover, as described above, the vertical movement of the magnetic tape (2) in the flangeless cassette (5) is restricted only by the slip sheet (14) having a weak regulating force, and the vertical movement of the magnetic tape (2) is also restricted. Since there is no regulating member, vertical winding is likely to occur, and the friction between the magnetic tape (2) and the slip sheet (14) increases, resulting in an increase in loss torque.

The present invention has been made to solve the above-mentioned problems of the conventional one, and performs fast-forwarding and rewinding without causing irregular winding in the vertical direction in the flangeless cassette while the magnetic tape is wound around the rotating head assembly. It is an object of the present invention to provide a magnetic recording / reproducing device that can be used.

[Means for solving problems]

A magnetic recording / reproducing apparatus according to the present invention includes a rotary head assembly that carries a magnetic head and rotates the magnetic head around a predetermined rotation axis, and the magnetic recording / reproducing apparatus is housed in a flangeless cassette that does not have a tape guide member in its inner core. In a magnetic recording / reproducing apparatus adapted to record / reproduce information by the magnetic head in a state where the magnetic tape is pulled out and wound around the rotary head assembly, or fast-forwards and rewinds the magnetic tape while maintaining the state. The magnetism that is wound around the core of the flangeless cassette on a pair of guide posts that are arranged closest to the respective outlets of the magnetic tape of the flangeless cassette and substantially parallel to the plane containing the respective outlets. A rule having a contact part that contacts the tape edge of the tape and restricts the vertical movement of the magnetic tape wound around the core. It is provided with a guide.

[Operation] In this invention, the vertical movement of the magnetic tape wound around the core of the flangeless cassette having no tape guide member in the inner core is regulated regardless of the traveling direction of the magnetic tape. To prevent random winding.

Furthermore, since a regulation guide is provided on the guide post that is arranged almost parallel to the plane including both outlets of the magnetic tape of the flangeless cassette, the magnetic tape is pulled out and fast-forwarded or rewound while wound around the rotary head assembly. Even in the case of performing the above, the respective regulation guides act evenly on the winding of the magnetic tape, the loss torque can be reduced, and the irregular winding can be surely prevented.

[Example of device]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a plan view and FIG. 2 will be described. 1 is a plan view, and FIG. 2 is a front view of the regulation guide taken along the line II-II in FIG. 1, and the same parts as those of the conventional one in FIG. The description is omitted.
In the figure, (10A) and (11A) are guide posts corresponding to the conventional (10) and (11), respectively, which are closest to both outlets (501) and (502) of the flangeless cassette (5). Therefore, no matter which direction the magnetic tape (2) travels, the top and bottom of the magnetic tape (2) which is going to be wound on the core (13) after entering the flangeless cassette (5). It acts as a regulation guide for regulating movement. In this embodiment, the magnetic head (2) is attached to the rotary head assembly (1) as is conventionally done.
The lower side position of the magnetic tape (2), the upper side position of the supply side of the magnetic tape (2) is regulated by the supply side tape guide body (3), and the lower side position of the magnetic tape (2) is regulated by the guide post (8). It is assumed that the take-up tape guide body (4) regulates the upper side and the guide post (9) regulates the lower side.

In the case of this embodiment, since the magnetic tape (2) is regulated downward by the guide posts (8) and (9), the magnetic tape (2) is regulated only upward by the guide posts (10A) and (11A). It is intended to regulate the vertical movement of the. Therefore, flanges (101) and (111) are provided on the tops of the guide posts (10A) and (11A), respectively, and the lower surface of the guide posts (10A) and (11A) contacts the upper tape edge (201) of the magnetic tape (2). , (112). As a result, the magnetic tape (2) is regulated upward, that is, its upward movement is regulated, and its vertical movement is regulated by the downward regulation by the guide posts (8) and (9). Therefore, even if the magnetic tape (2) is fast-forwarded and rewound while being wound around the rotary head assembly (1), irregular winding does not occur in the flangeless cassette (5), and the loss torque is increased accordingly. There is no.

The regulation guides are guide posts (10A) and (11A), and both outlets (501) and (502) of the flangeless cassette (5).
However, the direction in which the movement of the magnetic tape (2) is restricted by the movement is determined by how the vertical movement of the magnetic tape (2) is restricted along the running path. That is, in the above-mentioned embodiment, since it is assumed that the guide posts (8) and (9) regulate the lower side, the guide posts (10A) and (11A) regulate the upper side. (8),
If the upper side is regulated by (9), guide post (10
A) and (11A) may be configured so as to regulate the lower side as shown in FIG. That is, the flanges (101), (111)
The upper side of the bottom of the magnetic tape (2) tape edge (202)
The contact portions (102) and (112) that contact with (1) may be used. When the guide post (8) regulates the lower side and the guide (9) regulates the upper side, the guide post (10A) regulates the upper side as shown in FIG. The post (11A) may be used to regulate the lower side, and if the guide posts (8) and (9) are not regulating the vertical movement, as shown in FIG. It suffices to provide a pair of upper and lower flanges (101) and (111) on the posts (10A) and (11A) so as to perform both upper side regulation and lower side regulation. In short, the regulation guide has a contact portion that contacts the tape edge in the direction to be regulated, for example, the lower tape edge when it is desired to regulate downward movement, in relation to the regulation of vertical movement in other parts. Good. Of course, it goes without saying that the bidirectional regulation embodiment of FIG. 5 may be applied even when the direction to be regulated is only one direction. In the embodiment of FIG. 5, the dimension between the pair of upper and lower flanges is made larger than the width of the magnetic tape (2) by about 0.1 to 0.2 mm to prevent irregular winding.
It is desirable to prevent excessive friction between the magnetic tape (2) and the flanges (101) and (111).

In the above embodiment, the existing guide posts (10),
The flanges (101) and (111) are provided on (11) to serve as the regulation guides (guide posts (10A) and (11A), but both outlets of the guide posts (10) and (11) and the flangeless cassette (5) are provided. A regulation guide may be separately provided between (501) and (502).

[Advantages of the Invention] As described above, according to the present invention, the magnetic head is provided and the rotary head assembly that rotates the magnetic head around a predetermined rotation axis is provided. With the magnetic tape stored in the cassette pulled out and wrapped around the rotary head assembly,
In a magnetic recording / reproducing apparatus which records / reproduces information by the magnetic head, or fast-forwards and rewinds the magnetic tape while maintaining the state, in the vicinity of each outlet of the magnetic tape of the flangeless cassette. , And a pair of guide posts arranged substantially parallel to a plane including the respective outlets, in contact with the tape edge of the magnetic tape wound around the core of the flangeless cassette,
By providing a regulation guide having a contact portion that regulates the vertical movement of the magnetic tape wound around the core, the tape guide member is provided on the inner core regardless of the direction in which the magnetic tape travels. The vertical movement of the magnetic tape wound around the core of the flangeless cassette not having the above can be restricted to prevent irregular winding.

Furthermore, since a regulation guide is provided on the guide post that is arranged almost parallel to the plane including both outlets of the magnetic tape of the flangeless cassette, the magnetic tape is pulled out and fast-forwarded or rewound while wound around the rotary head assembly. Even when the above-mentioned procedure is performed, the respective regulation guides act evenly on the winding of the magnetic tape, the loss torque can be reduced, and the irregular winding can be surely prevented.

[Brief description of drawings]

1 is a plan view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a front view of a regulation guide taken along line II-II in FIG. 1, and FIGS. FIG. 6 is a front view showing another configuration of the regulation guide, FIG. 6 is a plan view of a conventional magnetic recording / reproducing apparatus, and FIG. 7 is a front view of a guide post taken along the line VII-VII in FIG. FIG. 8 is a sectional view of the flangeless cassette. In the figure, (1) is a rotary head assembly, (2) is a magnetic tape, (201) and (202) are tape edges, and (5).
Is a flangeless cassette, (501) and (502) are outlets, (10A) and (11A) are regulation guides (guide posts), (101) and (111) are flanges, and (10)
2) and (112) are contact parts. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-51-71120 (JP, A) JP-A-57-186259 (JP, A) Actually open 60-35344 (JP, U) Actual-open Sho-59- 50057 (JP, U) Actually opened 60-135891 (JP, U) Actually opened 62-73338 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A rotary head assembly for carrying a magnetic head and rotating the magnetic head around a predetermined axis of rotation, wherein a magnetic tape stored in a flangeless cassette having no tape guide member on its inner core is pulled out. In a magnetic recording / reproducing apparatus in which information is recorded / reproduced by the magnetic head in a state of being wound around a rotary head assembly, or the state is maintained for fast-forwarding and rewinding of a magnetic tape. A pair of guide posts arranged closest to each outlet of the tape and substantially parallel to a plane including the outlets are paired with the tape edges of the magnetic tape wound around the core of the flangeless cassette. A regulation guide having a contact portion that is in contact with and regulates the vertical movement of the magnetic tape wound around the core is provided. Magnetic recording and reproducing apparatus according to symptoms.