JPH04302884A - Tape reel - Google Patents

Abstract

PURPOSE:To prevent fall of the magnetic due to a clamp transfer by forming a stepped tape thickness part when a hub body part connected with the hub of the tape reel wound around a tape on the hub outer periphery via a hinge mechanism and the hub remaining part are combined. CONSTITUTION:A hole 15 provided on the tip of the magnetic tape 3 is engaged to a pawl 14 and the tape 3 is attached to the reel hub and when the remaining part 13c is combined to the body part 13b, a concave 16 is formed on the combined reel hub 13. Hence as the tape 3 is wound up, the stepped part of nearly a tape thickness only is formed on the winding surface of the tape 3, and it becomes a spiral form in a good order, so the clamp transfer is suppressed, the shift of the magnetic layers do not occur, the fall of the magnetic powders, the drop not are hardly generated thereby preventing the degradation of the recording and reproduction characteristics.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape reel used in a recording and/or reproducing apparatus.

0002

BACKGROUND OF THE INVENTION It is well known that tape cassettes have been used in recording and/or reproducing devices (hereinafter simply referred to as recording and reproducing devices) such as video tape recorders. Generally speaking, such a tape cassette has a supply reel and a take-up reel disposed inside a case body made by combining an upper half and a lower half made of plastic. A magnetic tape is stretched over a predetermined path between the supply reel and the take-up reel, and a rotating front cover is provided to protect the magnetic tape located outside the case body. We are prepared.

To attach the magnetic tape to the supply reel and take-up reel, the end of the transparent leader tape bonded to the end of the magnetic tape is placed in a recess in the hub, and a clamp member is fitted into the recess. It is carried out by However, with such a configuration, a phenomenon called clamp transfer often occurs, in other words, a step is formed at the boundary between the first and second wraps of the tape, and this step causes Misalignment is caused in the magnetic layer, which causes magnetic powder to fall off, causing dropouts and the like, resulting in a decline in recording and reproducing characteristics.

0004

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a tape reel in which magnetic powder is less likely to fall off. An object of the present invention is to provide a tape reel in which a tape is wound around the outer periphery of a hub, the hub comprising a hub body and a hub remainder connected via a hinge mechanism, wherein the hub body and the hub This is achieved by a tape reel characterized in that when it is combined with the remaining part, a stepped part approximately in tape thickness is formed in the combined part.

In other words, since the structure is such that a tape-thick step is formed in the portion where the tape is locked and pulled out, even if the tape is wound around the outer circumference of the hub, the tape will not be wound. There is no step formed at the boundary between the first and second wraps, which means that the tape is wound in an orderly spiral, so the magnetic layer does not shift and the magnetic powder is less likely to fall off. , dropout, etc. are less likely to occur, and deterioration of recording and reproducing characteristics is effectively prevented.

[0006]

[Example] Figures 1 to 5 show one of the tape reels according to the present invention.
1 is a schematic diagram showing a state in which a tape cassette containing a built-in tape reel of the present invention is loaded into a recording/reproducing device; FIG. 2 is an overall perspective view showing a state in which the front lid is opened; FIG. 3 is a plan view showing how the tape is attached to the hub;
FIG. 4 is a plan view showing the tape wound around the hub, and FIG. 5 is a perspective view of the tape reel.

The case body 1 constituting the tape cassette A is composed of a rectangular upper half 1a and a lower half 1b made of synthetic resin such as polypropylene, polystyrene, ABS resin, etc. 1
b are fitted into each other from above and below, and fixed with set screws to form an integral housing shape. Furthermore, upper half 1a
The mating surfaces of the lower half 1b and the lower half 1b are configured to have an uneven or ``'' shape, and when the two are mated together, the structure makes it difficult for dust and dust to enter the inside of the case main body 1 from the mating surfaces.

A pair of tape reels, namely a supply reel 2a and a take-up reel 2b, are rotatably housed in the case body 1, and the magnetic tape 3 is connected to the supply reel 2a and take-up reel 2b. It is wrapped and stretched between. Both tape reels are placed on the bottom plate of the lower half 1b, and their lower ends are positioned by fitting into reel fitting holes provided in the bottom plate.

[0009] Also, the supply side reel 2a and the take-up side reel 2b
In order to bias the supply reel 2a and take-up reel 2b toward the lower half 1b, a stainless steel presser spring 4 is provided at a predetermined position on the inner surface of the upper half 1a.
is welded. On the front surface of the case body 1, a front opening 5 is provided at approximately the center of the front wall 1c of the tape cassette (the front wall of the upper half 1a and the front wall of the lower half 1b). is provided with a bottom opening 6 that is continuous with the front opening 5. Then, the tape loading member of the recording/reproducing apparatus enters the pocket formed by the front opening 5 and the bottom opening 6 from the bottom opening 6, pulls out the magnetic tape 3 from the tape cassette A, and performs recording/reproduction on the recording/reproducing apparatus. It is configured so that recording and reproduction is performed by passing it around a mechanism B (rotating drum B1, various heads B2, various tape guides B3). The width of the front opening 5 should be such that the tape loading member of the recording/reproducing device can enter and pull out the tape 3 from the tape cassette A. It doesn't have to be as big as a tape cassette.

Reference numeral 7 denotes a lid that can open and close the pocket formed by the front opening 5 and the bottom opening 6. This lid 7 is of a sliding type, and as shown in FIG. 2, the lid 7 is slid to the right. When the lid 7 is open, the magnetic tape 3 can be pulled out to the front of the case main body 1. The lid 7 can be closed by sliding it to the left. When the magnetic tape 3 is stored in the case body 1 with the lid 7 closed, the magnetic tape 3 is completely shielded from the outside. The degree of sealing is extremely high. Any mechanism for attaching the lid 7 to the case body 1 may be used. For example, a slide groove (not shown) may be provided on the case body 1 side, and a convex portion (not shown) that engages with the slide groove on the lid 7 side. (not shown). In addition, the lid 7 and the case body 1 to which the lid 7 corresponds are provided with a click/clock mechanism with projections and recesses depending on the opening/closing position, so that the lid 7 can be held open/closed in each position. ing. In addition, the lid 7 is
For example, it is a molded article made of synthetic resin such as polypropylene, polystyrene, polyacetal, or ABS resin. Further, although the lid 7 is arranged inside the front wall 1c of the tape cassette, it may be arranged outside the front wall 1c of the tape cassette.

Tape guides 8a and 8b are constructed on both sides of the front opening 5 to prevent the magnetic tape 3 from coming into contact with the front wall 1c and being damaged when the magnetic tape 3 is pulled out. Further, tape guides 9a and 9b are provided on both sides of the bottom opening 6 at positions rearward of the tape guides 8a and 8b and forward of the innermost end of the bottom opening 6. Note that these tape guides 9a and 9b allow the magnetic tape 3 to be placed in the case main body 1 as shown by the imaginary lines in FIG.
When the magnetic tape 3 is not pulled out of the
is attached.

Reference numeral 10 denotes a light emitting element, and when the tape cassette A is loaded into the recording/reproducing apparatus, a cylindrical part provided on the bottom of the tape cassette (a split elastic member is inserted at the entrance of this cylindrical part) The light emitting element 10 enters into the tape winding surface portion (reel hub outer peripheral surface portion) of the supply reel 2a and take-up reel 2b through the transparent window of this cylindrical portion. ) is configured so that light from the light emitting element 10 is emitted.

11 is a supply side reel 2a (take-up side reel 2
The light reflecting portion b) is formed on the outer circumferential surface of the reel hub, and is configured to reflect the light from the light emitting element 10 when it hits it. 12a and 12b are light receiving elements, and the light receiving element 12a detects the reflected light when the light from the light emitting element 10 hits the light reflecting part 11 of the supply side reel 2a, and the light receiving element 12b detects the reflected light from the light emitting element 10.
The light from the winding reel 2b hits the light reflecting portion 11 of the take-up reel 2b and is reflected, and the reflected light is detected. Incidentally, when the tape cassette A is loaded into the recording/reproducing apparatus, these light receiving elements 12a and 12b also enter the cylindrical part provided on the bottom of the tape cassette and open the window made of a transparent material in this cylindrical part. It is configured such that light from the light reflecting portions 11 of the supply side reel 2a and the take-up side reel 2b hits the reel through the reel.

13 is a supply reel 2a (take-up reel 2
b) This reel hub 13 is a reel hub 13 that, when a tape cassette is loaded into the recording/playback device, connects the supply side reel disk and take-up side reel disk (
(not shown) is inserted. The shape of the part where the supply side reel disk and take-up side reel disk are inserted is such that the supply side reel disk and take-up side reel disk are inserted, and the driving force from the supply side reel disk and take-up side reel disk is received. Supply side reel 2a and take-up side reel 2
It is sufficient if the information is transmitted to b. This reel hub 13 is connected to the main body 13 via a thin-walled hinge 13a.
b and the remaining portion 13c, which are integrally molded using a predetermined resin material. Incidentally, when the main body portion 13b and the remaining portion 13c are combined, the outer circumferential surface thereof is configured to be a substantially cylindrical surface. Although not shown, when the remaining portion 13c is combined with the main body portion 13b, the remaining portion 13c is configured to be locked, for example, by a hook means, so that it does not open from the main body portion 13b.

Reference numeral 14 denotes a claw formed on the main body portion 13b, and as shown in FIGS. 3 and 5, the remaining portion 1 of the reel hub 13
When the magnetic tape 3c is opened from the main body 13b, the claw 14 engages a hole 15 provided at the tip of the magnetic tape 3 to prevent the magnetic tape 3 from coming off. Reference numeral 16 denotes a recess formed at the end of the main body portion 13b that joins the remaining portion 13c of the reel hub 13, and the surface of this recess 16 is a smooth curved surface different from an arc. In particular, this recess 16 is
As shown in FIG. 4, when the main body portion 13b and the remaining portion 13c of the reel hub 13 are combined, a stepped portion corresponding to the thickness of the magnetic tape 3 is formed.

When the reel hub is constructed as described above, as shown in FIGS. 3 and 5, the magnetic tape 3 is attached to the reel hub by engaging the claw 14 with the hole 15 provided at the tip of the magnetic tape 3. , when the remaining portion 13c is combined with the main body portion 13b, a recess 16 is formed in the combined reel hub 13. Therefore, as shown in FIG. 4, when the magnetic tape 3 is wound, no steps are formed on the winding surface of the magnetic tape 3, and it becomes a well-ordered spiral, so that clamp transfer is not caused. Misalignment of the magnetic layer is not caused, magnetic powder is less likely to fall off, dropout is less likely to occur, and deterioration of recording and reproducing characteristics is effectively prevented.

Furthermore, the magnetic tape 3 is connected to the reel hub 13.
Since the tapes are connected together and do not use a leader tape like the conventional tape, there are no steps formed in the tape winding state, dropouts are less likely to occur, and deterioration of recording and reproducing characteristics is further prevented. In addition, the reel hub 13 is constructed by integrally molding the main body part 13b and the remaining part 13c via a thin-walled hinge 13a, and since it is constructed from one part, parts management is easy and tape Ease of installation is also high.

In the above embodiment, the recess 16 was formed on the main body portion 13b side, but it may be formed on the remaining portion 13c side, or a stepped portion may be formed by forming the recess. Although the example has been explained, the stepped portion may be formed by forming a convex portion.

[0019]

[Effect] The tape reel according to the present invention is a tape reel in which a tape is wound around the outer periphery of a hub, and the hub is composed of a hub main body and a hub remainder that are connected via a hinge mechanism, and the hub When the main body part and the rest of the hub are combined, the combined part is configured to form a stepped part approximately the thickness of the tape, so that the tape is wound neatly and spirally around the reel hub, thus preventing clamp transfer. Since no misalignment is caused in the magnetic layer, it is difficult for magnetic powder to fall off due to clamp transfer, dropouts are less likely to occur, and deterioration of recording and reproducing characteristics is effectively prevented. Since the main body part and the remaining part are integrally constructed, parts management is easy and tape assembly workability is high.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a state in which a tape cassette containing a tape reel of the present invention is loaded into a recording/reproducing apparatus.

FIG. 2 is a perspective view of the entire tape cassette showing the front lid in an open state.

FIG. 3 is a plan view showing a state in which the tape is attached to the hub.

FIG. 4 is a plan view at a stage where the tape is wound around the hub.

FIG. 5 is a perspective view of a tape reel.

[Explanation of symbols]

A Tape cassette 1　　　　　　case body part 2a Supply side reel 2b Take-up side reel 3 Magnetic tape 13 Reel hub 13a Hinge 13b Main body 13c Remainder 16 Recessed part

Claims (1)

[Claims] 1. A tape reel in which tape is wound around the outer periphery of a hub, the hub comprising a hub main body and a hub remainder connected via a hinge mechanism, wherein the hub main body and the hub remainder are connected to each other via a hinge mechanism. 1. A tape reel characterized in that, when the tape reels are combined, a stepped portion having a substantially tape thickness is formed in the combined portion.