JPH07244956A - Tape cassette - Google Patents

Abstract

PURPOSE:To obtain a tape cassette capable of neatly winding the tape onto a tape reel by providing the tape winding disturbance preventing function on a tape sag eliminating mechanism in the tape cassette. CONSTITUTION:The tape is elastically brought into contact with a guide pin 8 by the elastic force of a tape sag eliminating member 9. A pad 11 is fitted to the tape sag eliminating member 9 with the utilization of the tape sag eliminating mechanism 7 by which the specified frictional operation is imparted to the tape. The upper edge of the tape is made to run along a guide projecting part 12 having the tape winding disturbance preventing function provided on the upper end part of this pad 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette suitable for use in a tape cassette of, for example, Betamax system, Betacam system or VHS system, and more particularly to a tape slack preventing mechanism having a tape winding disorder prevention function. is there.

[0002]

2. Description of the Related Art Conventionally, a tape of a tape cassette of this type is wound in a state in which it is wound in a tape feeding reel and a tape take-up reel in a state in which the tape edge does not fly out, so-called winding disorder, in various running modes of the tape. It is ideal to be done. In order to wind the tape, it is possible to regulate the height of the winding position of the tape.

As a method of regulating the height of the winding position of the tape, only the height regulation by the tape loading guide on the VTR mechanical deck side is performed in the tape loading state, and the above-mentioned height regulation of the tape is particularly performed in the tape cassette. There is no mechanism for. Therefore, the height of the tape is not regulated from the tape loading guide on the VTR mechanical deck side to the tape reel hub of the tape cassette.

[0004]

Therefore, at the time of high-speed winding of the tape onto the tape supply reel or the tape take-up reel, a so-called air film phenomenon occurs in which air is wound between the layers of the tape to be wound, and the winding takes place. There is a problem in that the tape to be ejected causes a winding disorder that fluctuates up and down, causing the tape edge to fly out. If the tape cassette is accidentally dropped, the impact of the tape edge causes the reel flange to strongly press on the tape edge that is ejected, resulting in damage to the tape edge. There was a definite problem that it affected recording and playback.

The present invention has been made in order to solve the above-mentioned problems, and a tape slack preventing mechanism in a tape cassette has a function of preventing the winding of the tape from being disturbed so that the tape is wound around the tape reel. The purpose is to obtain a tape cassette that can be used.

[0006]

In order to achieve the above-mentioned object, the tape cassette according to the present invention uses a guide pin 8 for a tape drawn from a tape supply reel 2 and / or a tape wound on a tape take-up reel 3. Also, in a tape cassette provided with a tape slack preventing mechanism 7 which is sandwiched between the tape slack preventing member 9 and the tape slack preventing member 9, a guide protrusion 12 is provided at an end of the tape slack preventing member 9, The tape 12 is provided with a tape slack preventing mechanism having a function of preventing the tape from being disordered so that the edges of the tape are arranged along the protrusions 12.

In the tape cassette according to the second aspect of the present invention, the guide protrusion 12 is provided at the upper end of the tape loosening prevention member 9, and the guide protrusion 1 is provided.
2 is such that the upper edge of the tape runs along.

Further, in the tape cassette according to the preferred embodiment of the present invention, the guide protrusion 12 is formed on the pad 11 attached to the tape loosening prevention member 9.

[0009]

In the tape cassette of the present invention constructed as described above, the tape slack preventing member 9 is provided with the guide protrusion 12 at the end thereof, and the tape is wound along the edge of the tape. Since the disturbance prevention function is provided, the tape edge is guided by the guide protrusions 12 of the tape slack preventing member 9 when the tape is running, the height position of the tape is regulated, and the tape is wound in a regular winding state on the tape reel. Can be dressed.

Further, since the guide protrusion 12 is provided on the upper end portion of the tape slack preventing member 9 and the upper edge of the tape is arranged along the guide protrusion 12, the tape reel is aligned with the upper edge of the tape. It can be wound around.

A guide protrusion 12 is provided on the pad 11 attached to the tape slack preventing member 9, and the guide protrusion 12 is provided.
Since the tape edge is arranged along the tape, the tape edge can be softly contacted with the pad when the tape is running, and the tape edge is not damaged.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tape cassette according to the present invention will be described below with reference to the drawings by taking a beta type tape cassette as an example. FIG. 1 is a plan view showing a state in which the upper half of the tape cassette of this example is removed.

First, the main structure of the tape cassette will be described with reference to FIG. 1. Reference numeral 1 is a lower half which constitutes a cassette housing of the tape cassette. A tape supply reel 2 and a tape take-up reel 3 are rotatably accommodated in the lower half 1. The tape supplied from the tape supply reel 2 traverses the mouse portion 5 of the cassette housing via the tape guide 4 on the supply side, and is taken up by the tape take-up reel 3 via the tape guide 6 on the take-up side. There is.

Further, between the tape supply reel 2 and the tape guide 4 on the supply side, and between the tape take-up reel 3 and the tape guide 6 on the take-up side, there are tape slack preventing mechanisms 7 and 7, respectively.
Is provided. Since both tape loosening prevention mechanisms have the same structure, the tape loosening prevention mechanism 7 on the tape supply reel 2 side will be described with reference to the perspective view shown in FIG.

The tape loosening prevention mechanism 7 is composed of a guide pin 8 and a tape loosening prevention member 9. The lower end portion of the guide pin 8 is press-fitted and fixed to a bearing boss 10 provided on the bottom surface of the lower half 1 of the cassette housing, and the upper end portion of the guide pin 8 is supported by an axial boss provided on the back surface of the upper half (not shown). There is. The tape slack preventing member 9 is made of an elastically deformable film-shaped member, and one end of the tape slack preventing member 9 has a rib 1 of the lower half 1.
It is fixed to a by a method such as adhesion. The other end of the tape slack preventing member 9 is a free end, and the tape T is squeezed by the guide pin 8 side so that the tape slack preventing member 9 is bent by an elastic action. by this,
The tape T is sandwiched between the guide pin 8 and the tape slack preventing member 9 with a constant pressure contact force so that the tape supplied from the tape supply reel 2 does not loosen.

Thus, the tape slack preventing mechanism 7 constructed as described above has a tape winding disorder prevention function. That is, a pad 11 made of, for example, a felt material is attached to the tip of the tape slack preventing member 9 facing the tape by a method such as bonding. A projecting piece-shaped guide projection 12 is formed on the upper end of the pad 11, and the guide projection 1
The upper edge T ₁ of the tape T is positioned so as to be in contact with the lower edge of the tape 2, and the tape T is sandwiched between the guide pin 8 and the tape loosening prevention member 9.

In FIG. 1, reference numerals 13 and 13 denote reel lock mechanisms provided on the tape supply reel 2 side and the tape take-up reel 3 side, respectively. The reel lock mechanism 13 is not directly related to the present invention, and therefore its explanation is omitted.

As described above, according to the present invention, the tape loosening prevention mechanism 7 is provided.
Since the tape winding disorder function is provided on the tape, the tape supplied from the tape supply reel 2 is kept in a state in which the upper edge of the tape is restricted by the guide protrusion 12 of the pad 11 in the height direction when the tape is running. Can be run. Further, when the tape is taken up on the tape take-up reel 3, the tape is taken up on the tape take-up reel 3 because the upper edge of the tape is taken up by the guide projection 12 of the pad 11 in a position where the position in the height direction is restricted. The tape is wound with the upper edges of the tape aligned (see FIG. 3).

That is, in high-speed rewinding of the tape to the tape supply reel 2 side and high-speed fast-forwarding of the tape to the tape take-up reel 3 side, an air film phenomenon may occur between the tapes. In addition, the tape can be wound around the tape supply reel 2 and the tape take-up reel 3 without being disturbed.

Further, since the tape is made to run along the guide projection 12 formed on the pad 11, the tape edge is softly contacted and the tape edge is not damaged.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

In the embodiment, the pad 11 in which the guide protrusion 12 is formed on the tape slack preventing member 9 of the tape slack preventing mechanism 7 is used.
However, the guide protrusion may be directly formed on the tape slack preventing member 9.

Further, in the embodiment, the case where the height direction of the upper edge of the tape is regulated by the guide protrusion 12 has been described, but the guide protrusion 12 is provided below the tape loosening prevention member 9 and the lower edge of the tape is prevented. It is also possible to regulate the height direction.

In the embodiment, the tape slack preventing mechanism 7 is described as a beta type tape cassette provided on both the tape supply reel 2 side and the tape take-up reel 3 side. Even when used in a VHS type tape cassette in which the stopping mechanism is provided only on the tape supply reel side, the same operation as that of the above-described embodiment can be obtained.

[0025]

As described above, the tape cassette according to the present invention is provided with a guide protrusion at the end of the tape slack preventing member, and the tape winding is arranged such that the edge of the tape is along the guide protrusion. Since the tape slack preventing mechanism having the prevention function is provided, there is an effect that the tape can be wound around the tape supply reel and the tape take-up reel without being disturbed. As a result, even if the tape cassette is accidentally dropped, the impact can prevent the tape edge from being damaged by the reel flange.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which an upper half of a tape cassette of this example is removed.

FIG. 2 is a perspective view of a tape loosening prevention mechanism having a tape winding disorder prevention function.

FIG. 3 is a side view of a guide protrusion, a tape, and a tape take-up reel.

[Explanation of symbols]

 1 lower half 2 tape supply reel 3 tape take-up reel 4 supply-side tape guide 6 winding-side tape guide 7 tape loosening prevention mechanism 8 guide pin 9 tape loosening prevention member 11 pad 12 guide protrusion (tape winding disorder prevention function) T tape

Claims (3)

[Claims] 1. A tape slack preventer for preventing slack of the tape by sandwiching a tape drawn from a tape supply reel and / or a tape wound on a tape take-up reel with a guide pin and a tape slack preventing member. In a tape cassette provided with a mechanism, a tape slack preventing mechanism having a tape winding prevention function is provided in which a guide protrusion is provided at the end of the tape slack preventing member, and the edge of the tape is arranged along the guide protrusion. A tape cassette characterized by having it. 2. The tape cassette according to claim 1, wherein the guide protrusion is provided on an upper end of the tape slack preventing member, and the upper edge of the tape is aligned with the guide protrusion. 3. The tape cassette according to claim 2, wherein the guide protrusion is formed on a pad attached to the tape loosening prevention member.