JPS5822311Y2 - tape cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette, and is particularly suitable for use in a tape cassette that is used in a VTR and has a magnetic recording tape wound therein.

The tape cassette used in the cassette type VTR is
As shown in the figure, a pair of reels 2 and 3 are arranged in a cassette casing 1 consisting of a pair of upper and lower halves, and a magnetic tape 4 is wound around these reels 2 and 3 with both ends fixed. .

The magnetic tape 4 pulled out from one reel 2 is sandwiched between the low friction member 6 attached to the tip of the elastic film 5 and the half wall 7, and receives back tension.
It passes between a pair of guide pins 8 and 9, passes through a recess 10 on the front side of the cassette casing 1, and is guided by a guide pin 11 to reach the other reel 3.

When crossing the recess 10 on the front side, it is held in a predetermined position by a low friction member 13 attached to the tip of another elastic film 12.

As described above, in the conventional tape cassette, the pair of elastic films 5.degree. 12 were separately attached to the cassette casing 1 by adhesion, which increased the number of assembly steps and resulted in poor work efficiency.

Furthermore, since the elastic film 12 must be bent at its gripping portion, this also increases the number of man-hours and increases the cost of the tape cassette.

The present invention was devised in view of these problems, and involves attaching an elongated elastic member to a portion of the cassette half that is provided at approximately the center of the lengthwise direction of the elastic member. The present invention relates to a tape cassette characterized in that low-friction members are fixed to both ends, and these low-friction members are brought into contact with the tape to guide the tape to a predetermined state within the cassette cassette.

Therefore, the number of steps for assembling the tape cassette is reduced, making it possible to reduce costs.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 2 and 3, the lower half of the cassette casing 16 of this embodiment has a V-shaped recess 1.
7, and an upright front wall portion 18 is connected to the front edge of the lower half where the V-shaped recess 17 is formed.

This front wall portion 18 is bent in a V-shape following the recessed portion 11 described above.

A mounting portion 19 is integrally provided at the right end of the front wall portion 18 in FIGS. 2 and 3.

The attachment portion 19 is inclined with respect to the front edge of the cassette casing 1, as shown in FIG.

An elastic, elongated polyester film 20 is attached to the attached portion 19 by adhesion at approximately the center thereof.

Note that this attachment part 19 has a V-shaped notch 21 formed approximately in the center of the film 20 that is adhered to the part 19.
Further, a V-shaped convex portion 22 is formed on the attached portion 19.

Therefore, when attaching the film 20 to the part 19 to be attached by adhesive, the notch 22 is engaged with the convex part 22, thereby positioning the film 20 with respect to the part 19 to be attached.

By doing this, there is no variation in the attachment of the film 20, and it is also prevented from attaching the film 20 upside down, which is very convenient in terms of work.

Both ends of the film 20 are free, and low-friction members 23 and 24 made of Teflon sheets containing carbon, which have relatively little friction and have an antistatic effect, are fixed to the ends.

One low-friction member 23 faces the tip of a wall 25 formed on the lower half of the cassette casing 16, and the low-friction member 23 and wall 25 connect the magnetic tape
6, thereby applying a certain appropriate back tension to the magnetic tape 26 to prevent the magnetic tape 26 from loosening.

Further, the other low friction member 24 contacts the inner surface of the magnetic tape 26 and pushes the magnetic tape 26 toward the front side of the cassette casing 16.

That is, the magnetic tape 26 is maintained at a constant distance from the front wall 18 of the cassette casing 16, so that the tape pull-out pin can enter inside the magnetic tape 26 from the V-shaped recess 17 of the casing 16. ing.

The magnetic tape 26 crossing the V-shaped recess 17 passes between two guide pins 27 and 28 on the right side and is guided by a guide pin 29 on the left side.

In this way, the low friction members 23 and 24 are attached to both free ends of one film 20, and the low friction members 23 and 24 are attached to the wall portion 19 of the casing 16.
Since the tape cassette 16 is attached to the tape cassette 16, the tape cassette 16 can be easily assembled because the film 20 only needs to be attached once. become.

Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention.

For example, the present invention can be applied to tape cassettes other than VTRs.

Further, the mounting position of the film 20 can be changed as appropriate depending on the purpose.

As described above, the present invention attaches an elongated elastic member to the attachment point provided on the cassette half at approximately the center in the longitudinal direction, and fixes low-friction members to both ends of this elastic member. Since these low-friction members are brought into contact with the tape to guide the tape to a predetermined state within the cassette cassette, the number of steps required to assemble the tape cassette is reduced, which reduces the cost of the tape cassette. become.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway plan view of a conventional tape cassette for a VTR, Fig. 2 is a cross-sectional view of the main part of a tape cassette according to an embodiment of the present invention, and Fig. 3 is the same diagram. FIG. In addition, in the symbols used in the drawings, 16... is the cassette casing, 19... is the part to which it is attached, and 20...
...Polyester film, 23...Low friction member, 24...Low friction member, 26...
...magnetic tape.

Claims (1)

[Scope of utility model registration request] Attaching the elongated elastic member to the attachment point provided on the cassette half approximately in the center of the lengthwise direction,
A tape cassette, characterized in that low-friction members are fixed to both ends of the elastic member, and these low-friction members are brought into contact with the tape to guide the tape to a predetermined state within the cassette cassette.