JP2569715B2 - Tape guiding method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a so-called helical scan type video tape recorder (VTR) for mounting a tape cassette.
The present invention relates to a tape guiding method and a tape guiding method for guiding a tape running on the inclined rotary head drum to a peripheral surface side of the rotary head drum.

SUMMARY OF THE INVENTION The present invention relates to a so-called helical scan type rotary head drum, in which a lid of a tape cassette is mounted in close proximity to the peripheral surface thereof in an open state, and the front surface of the tape cassette opened by the lid in this open state. In a tape guiding method and apparatus for guiding a tape exposed from an opening and riding on the rotary head drum to a peripheral surface side of the rotary head drum before tape loading, a tape cover for mounting the tape cassette is provided. When the tape rides on the rotary head drum by the opening operation of the body, the rotary head drum is rotated in a predetermined direction to move the projection provided on the outer edge of the upper surface thereof, so that the tape cassette lid The tape running on the rotating head drum at the time of opening of the rotating head drum can be reliably wiped off to the peripheral surface side of the rotating head drum, It is obtained to be able to achieve further stabilization of the tape loading to reliably prevent the tape jamming during-loop loading.

[Prior art] For example, a VTR using a tape cassette having a lid
When the tape cassette is mounted, the tape exposed from the front opening opened by the opened lid of the tape cassette is guided to the peripheral surface so as not to run on the rotating head drum. A tape guide device as shown in JP-A-57-87363 is attached. This will be described in detail with reference to FIGS. 7 to 9.
This is a chassis that is located inside the VTR main unit.
A rotary head drum 51 of a helical scan type is provided on the top 0, and positioning pins 53 for positioning the tape cassette 52 at the time of mounting are projected. Further, a pair of tape guides 54, 54 is provided upright on the chassis 50 between the rotary head drum 51 and the positioning pins 53 near the peripheral surface 51a of the rotary head drum 51. This pair of tape guides 54,
On the tape 54, a tape guide device 55 is mounted. The tape guide device 55 is composed of a pair of tape sliding guides 56, 57 fixed on the pair of tape guides 54, 54.
Inclined surface 56 that guides the pair of front openings 52a, 52a.
a and 57a are formed respectively. The tape cassette 5
The pair of front openings 52a, 52a are normally closed by a lid 58, and when the tape cassette 52 is mounted on the VRT main body, as shown in FIG. As a result, the lid 58 opens upward and is opened.

The tape T between the pair of front openings 52a, 52a is generated by the vibration, drop, static electricity, etc. of the tape cassette 52.
Is loosened, and is pressed against the inner surface of the lid 58 by its own elasticity (rigidity). In this state, the eighth
As shown, the tape cassette 52 when going mounted (lowered) to the VTR, and at the same time the lid 58 of the tape cassette 52 is opened to some extent in its ongoing-attachment, the T ₁ of the tape T Figure 7 As shown in the figure, there is a case where the player jumps forward on the rotary head drum 51 and tries to ride on the rotary head drum 51. At this time, the tape T that has been opened by the lid 58 of the tape cassette 52 and unexpectedly popped out is, as shown by the arrow in FIG. 9, a pair of tape sliding guides 56,5.
The pair of tape guides 54, 54 and the tape cassette 52 are pushed back by a pair of tapered surfaces 56a, 57a by the inclined surfaces 56a, 57a.

[Problems to be solved by the invention] However, as the VTR body becomes smaller, lighter and thinner,
The distance l between the rotary head drum 51 and the tape cassette 52 at the time of mounting is shortened, and the tape cassette 52 vibrates due to the lack of a reel lock mechanism in the tape cassette 52 and the like.
When the dropping or the like is applied, it is not possible to reliably prevent loosening of the tape T, the pop-out amount of the tape T is, the pair as shown in T ₂ of the Figure 7 also unexpectedly tape sliding guide member 56, In the case where the tape guide device 55 protrudes long beyond the rotary head drum 51 beyond 57, the tape guide device 55 cannot sufficiently cope with the problem and points out a problem that the tape loading after mounting the tape cassette is hindered. Have been.

In view of this, the present invention relates to a tape head that unexpectedly jumps out of the front opening of the tape cassette opened by the lid in the open state and rides on the rotary head drum when the tape cassette lid is opened. An object of the present invention is to provide a tape guiding method and a tape guiding method which can be knocked down on a peripheral surface side.

[Means for Solving the Problems] When the tape cassette cover is mounted close to the peripheral surface of the rotary head drum inclined at a predetermined angle with respect to the chassis in an open state, the tape cassette is opened by the open cover. The tape which is exposed from the front opening of the tape cassette and rides on the rotary head drum is blown off to the peripheral surface side of the rotary head drum by the projection on the outer edge of the upper surface by rotating the rotary head drum. . On the upper part of the rotary head drum, a projection is provided on the peripheral surface of the rotary head drum for removing the tape.

[Action] Even if the tape cassette lid is opened near the upper part of the rotary head drum and the tape unexpectedly jumps onto the rotary head drum from the front opening of the tape cassette opened by the open lid, By rotating the rotary head drum and moving the protrusions on the outer edge of the upper surface in a direction in which the tape cassette is wiped off, the tape running on the rotary head drum is splashed to the peripheral surface side of the rotary head drum. . As a result, the tape running on the rotary head drum when the tape cassette is mounted is wiped off, so that jamming of the tape during tape loading is reliably prevented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a camera-integrated 8-mm VTR used in the tape guiding method of the present invention, and a chassis 2 is arranged on one side of the main body. The bottom surface of the main body on the chassis 2 is formed with a convex portion 2a, and the helical scan type rotary head drum 3 is provided on the convex portion 2a. Further, a pair of substantially arc-shaped guide grooves 2b and 2c, which are a part of the guide rail, are formed at positions of the protrusion 2a along the peripheral surface 3a of the rotary head drum 3. further,
A capstan 4 and a supply-side guide roller 5 are rotatably supported in front of and behind the main body side of the chassis 2 so as to sandwich the rotary head drum 3.

On the chassis 2, as shown in FIGS. 1 and 5, a linear skate chassis 7 is driven with respect to a peripheral surface 3a of the rotary head drum 3 via four support pins 6,. It is reciprocally movable by a mechanism. On the linear skate chassis 7, a pair of reel stands 8a, 8b
Are rotatably supported, and a pair of positioning pins 9 for positioning when the tape cassette 40 described later is mounted.
9 are protruding. A pair of guide rails 14 and 15 for moving a pair of left and right sliders 12 and 13 having a pull-out guide 10 and an inclined guide 11 are fixed at a position near the rotary head drum 3 of the linear skate chassis 7. The pair of sliders 12 and 13 reciprocate while sliding on the pair of guide rails 14 and 15 and the pair of guide grooves 2b and 2c by a driving mechanism including a loading ring 16 and the like. . In addition, the linear skate chassis 7
On the upper capstan 4 side, a pinch roller 17 that rotates by pressing against the capstan 4 when the tape T in the tape cassette 40 runs is rotatably supported. The vertical upright piece 7b on the guide roller 5 side of both vertical upright pieces 7a, 7b of the linear skate chassis 7 has a cover of the tape cassette 40.
A pin 18 for opening and closing 41 is protruded.

Also, both vertical standing pieces 19a, which are vertically erected at both ends of the chassis 2 on the side of the capstan 4 and the guide roller 5, are provided.
19b, the tape cassette 40 is held by holding the tape cassette 40 and the cassette holder 20 for mounting the tape cassette 40 on the pair of reel stands 8a, 8b and the pair of positioning pins 9, 9 on the linear skate chassis 7 is rotatably supported. I have. That is, in the cassette holder 20, a pair of leg portions 21a, 21b are pivotally supported by pins on both vertical upstanding piece portions 19a, 19b of the chassis 2, and the torsion coil springs 22 constantly urge upwardly in FIG. The outer holder 21 and a pair of legs 23a, 23b are respectively supported by pins on the vertical upright pieces 7a, 7b of the linear skate chassis 7, and the linear skate chassis is mounted with the tape cassette 40 mounted. 7 and an inner holder 23 which reciprocates with respect to the rotary head drum 3.

Thus, the tape T which runs over the rotary head drum 3 when the tape cassette 40 is mounted from the concave portion 3b on the upper surface of the rotary head drum 3 to the upper outer edge 3c is blown off to the peripheral surface 3a side of the rotary head drum 3. The projection 30 constituting the guide device is fixed by a screw 31. More specifically, as shown in FIG. 2, the projection 30 is formed in a plate shape from a synthetic resin, and its tip portion 30a projects slightly from the outer edge 3c of the upper surface of the rotary head drum 3 (about 1 mm). 2), the base 30b is fixed to the recess 3b of the rotary head drum 3 by the screw 31.

A pair of front openings 42, 42 for exposing the tape T when the lid 41 is opened is formed at the front of the tape cassette 40. Reference numeral 43 denotes a take-up reel, and reference numeral 44 denotes a supply reel.

According to the above embodiment, the tape cassette 40 is inserted into the cassette holder 20 of the camera-integrated 8 mm VTR 1, the cassette holder 20 is closed, and the table cassette 40 is moved to the pair of reel bases 8 a on the linear skate chassis 7. , 8b and the positioning pins 9, 9, the lid 41 of the tape cassette 40 starts to be opened by the pins 18 of the vertical upright piece 7b of the linear skate chassis 7, as shown in FIG. . The tape T between the pair of front openings 42, 42 of the tape cassette 40 opened by the opening movement of the lid 41 is loosened, or static electricity generated in the lid 41 or the like causes
At the same time as the lid 41 is slightly opened, the tape T suddenly jumps out onto the rotary head drum 3, and as shown in FIG.
When the tape cassette 40 is mounted on the rotary head drum 3 when the tape cassette 40 is fully opened, the tape cassette 40 may be mounted.

In this case, as shown in FIG. 4, while rotating the take-up reel base 8a in the take-up direction, the rotary head drum 3 is moved in the direction of the arrow in FIG.
By rotating the head drum 3
The tape T that has run up is knocked off, and the tape T that has run out of the tape T and is mounted on the rotary head drum 3 is wound up by the take-up reel 43 and stored in the tape cassette 40. Thus, the tape cassette 40 is mounted at a predetermined position on the chassis 3 while the tape T is positioned at a regular predetermined position (near the peripheral surface 3a of the rotary head drum 3).

Note that the reel base 8a for winding is a tape cassette.
At the time of mounting of 40, since it is in a free state where the brake is not applied, the top and the end of the tape T are detected by an optical sensor or the like (not shown), and when the leader tape is at the top or the end, the winding operation of the protruding tape T is performed. However, it is also possible to rotate the supply reel base 8b side on which the brake is applied by a limiter (not shown) or the like to wind the protruding tape T. After the rotary head drum 3 is rotated to remove the tape T from above the rotary head drum 3, the tape T may be wound up by a take-up reel 43 (or a supply reel 44). 3
May also be in the opposite direction to the rotation direction.

After the completion of the mounting of the tape cassette 40, the linear skate chassis 7 moves forward by a predetermined stroke from the position shown in FIG. 5 to the rotary head drum 3 side, and the tape T is pulled out by the pull-out guides 10 on the pair of sliders 12 and 13. The tape T loaded on the rotary head drum 3 when the tape cassette 40 is mounted is projected as described above.
30 skipped, take-up reel 43 tape cassette
Since the tape is wound at a regular position within 40, no tape jamming occurs during tape loading, and the tape loading is performed in a stable state.

As described above, since the projection 30 attached to the upper portion of the rotary head drum 3 only slightly protrudes from the outer edge 3c of the upper surface thereof, it does not obstruct the tape running system or the like during reproduction or the like. In addition, on the rotating head drum 3
If there is a space of about 1 mm, the projection 30 can be attached and space saving can be achieved.Because the projection 30 is also a resin molded product, it is low cost and contributes to the reduction in size and weight of the VTR body. it can.

According to the above embodiment, the tape guide method and its device are applied to the camera-integrated 8 mm VTR. However, the present invention is not limited to this and can be applied to a general VTR.

In addition, the protrusion 30 for removing the tape T of the rotary head drum 3 is formed in a plate-like shape of a synthetic resin and is attached to the upper portion of the rotary head drum 3 with the screw 31. However, the present invention is not limited to this. Alternatively, the projection 32 may be formed so as to project from a part of the outer edge 3c of the upper surface of the rotary head drum 3 by integral molding.

[Effects of the Invention] As described above, according to the present invention, when the tape rides on the rotary head drum by the opening operation of the lid when the tape cassette is mounted, the rotary head drum is rotated in a predetermined direction and the upper surface thereof is rotated. By moving the projection provided on the outer edge, the tape which has run on the rotary head drum when the lid of the tape cassette is opened can be blown off to the peripheral surface side of the rotary head drum. As a result, jamming of the tape during tape loading can be reliably prevented, and the tape loading can be further stabilized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tape guide device according to an embodiment of the present invention in the course of mounting a tape cassette, FIG. 2 is an enlarged partial cross-sectional view of the main part, FIG. FIG. 5 is a schematic plan view when a tape cassette is mounted, FIG. 5 is a schematic side view when a tape cassette is mounted, FIG. 6 is a perspective view of another embodiment, FIG. 7 is a plan view of a conventional tape guide device, FIG. 8 is a side view showing a state in the middle of mounting the conventional tape cassette, and FIG. 9 is a side view showing a state after the mounting of the tape cassette in the conventional example. 2 ... chassis, 3 ... rotating head drum, 3a ... peripheral surface, 3c ... top outer edge, 30, 32 ... projection, 40 ... tape cassette, 41 ... lid, 42 ... front opening, T ... tape.

Claims (2)

(57) [Claims] When a tape cassette lid is mounted close to the peripheral surface of a rotary head drum inclined at a predetermined angle with respect to a chassis in an open state, the tape cassette opened by the open lid is closed. The tape exposed from the front opening and riding on the rotary head drum is swept to the peripheral surface side of the rotary head drum by rotating the rotary head drum and projecting on the outer edge of the upper surface thereof. Tape guidance method. 2. A tape cassette lid is disposed close to the peripheral surface of a rotating head drum inclined at a predetermined angle with respect to a chassis in an open state, and the front surface of the tape cassette opened by the lid in the open state. In a tape guide device for guiding a tape exposed from an opening to ride on the rotary head drum to a peripheral surface side of the rotary head drum, a lid of the tape cassette is provided on an outer edge of an upper surface of the rotary head drum. A tape guide device provided with a projection for wiping off the tape running on the rotary head drum at the time of opening of the rotary head drum on the peripheral surface side of the rotary head drum.