JPH0927178A - Tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce costs for a tape guide and to improve productivity regarding the structure of a tape cassette. SOLUTION: A tape cassette with a tape recording medium housed in the interior of an upper and lower half assembly is provided and a guide inserting boss 13 for inserting a tape guide 12 therein for guiding the traveling of the tape recording medium is erected from a lower half 3. Also, a projection 18 for positioning the tape guide 12 in an upper position avoiding a guide flange 14 inserted and fitted into the lower end part of the guide inserting boss 13 and other than the range of the contact of the tape recording medium is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a tape cassette in which a tape-shaped recording medium is housed inside upper and lower half assemblies.

[0002]

2. Description of the Related Art Conventionally, for example, a U-matic tape cassette 1 is housed in an upper half 2 and a lower half 3 made of a synthetic resin and inner spaces of the upper and lower halves 2 and 3, as shown in FIG. When the tape-shaped recording medium 6 wound around the take-up reel 4 and the supply reel 5 and the upper and lower halves 2 and 3 are fastened together by a tapping screw or the like, the front opening can be opened and closed freely. The front lid 7 and so on.

The tape guides 8 and 9 for guiding the running of the tape-shaped recording medium 6 are the upper and lower halves 2.
It is sandwiched between 3 and fixed by screwing.

The tape guides 8 and 9 are made of stainless steel in a cylindrical shape, and screw parts are formed on the inner peripheral surfaces of the upper and lower end parts for screwing.

At the upper and lower ends of the tape guide 8, for example, stainless steel guide collars 10 are clamped together with the screws and sandwiched between the inner surfaces of the upper and lower halves 2 and 3.

In order to reduce the cost and improve the productivity of these tape guides, as shown in FIGS. 5 to 7, the tape guide is used as a tape guide 12 by rolling a stainless steel plate material 11 into a cylindrical shape. Form.

Then, the tape guide 12 is fitted into a guide insertion boss 13 provided upright from the lower half 3, the guide collars 14 and 14 are sandwiched between the upper and lower ends of the tape guide 12, and screwed with screws 15 and 16. Such a structure is proposed.

[0008]

However, as shown in FIG. 7, the tape guide 12 is unavoidably subject to a step or a gap at its joint 12a.
If the seam 12a is in contact with the tape-shaped recording medium 6, the tape-shaped recording medium will be scratched during image reproduction or tape rewinding. To avoid that,
The joint 12 is provided at a position where it does not come into contact with the tape-shaped recording medium.
It is necessary to position the tape guide 12 so that a is located.

Therefore, it is necessary to provide the guide insertion boss 13 with a projection 17 for positioning the tape guide 12 and to position the V-shaped notch 12b of the tape guide 12 by engaging with the projection 17.

However, since the protrusion 17 is provided,
In order to insert the guide collar 14 into the guide insertion boss 13, it is necessary to provide a notch 14a which engages with the protrusion 17 on the inner peripheral surface of the guide collar 14, and the notch 14a is formed. The existence makes it difficult to manufacture the guide collar 14.

As described above, there are problems to be solved in order to reduce the cost of the tape guide and improve the productivity.

[0012]

The gist of the tape cassette according to the present invention for solving the above problems is a tape cassette in which a tape-shaped recording medium is housed inside an assembly of upper and lower halves. A guide insertion boss into which a tape guide that guides the travel of the tape-shaped recording medium is inserted is erected from the lower half, and at an upper position avoiding the guide collar that is fitted into the lower end of the guide insertion boss, and That is, a protrusion for positioning the tape guide is provided in a region other than the range where the tape recording medium abuts.

The projection has a taper surface in the vertical direction; the tape guide has notches for positioning at the upper and lower ends thereof;
Further, the notch is provided at the position of the seam of the tape guide.

According to the tape cassette of the present invention, the guide brim is inserted over the projection provided on the guide insertion boss. The through hole for inserting into the boss of the guide collar does not need to be provided with the relief portion for the protrusion, and the through hole can be formed simply in a circular shape.

As a result, it is possible to use, for example, a tape guide formed by rolling a stainless steel plate material, and a guide collar having a simple circular through hole, thereby reducing costs and improving productivity.

[0016]

Next, an embodiment according to the present invention will be described in detail with reference to the drawings. The first embodiment of the present invention, as shown in FIGS.
(See FIG. 6) is inserted, and a guide insertion boss 13 for positioning and standing upright is vertically provided from the lower half 3.

At the upper position of the guide insertion boss 13 avoiding the guide collar 14 fitted into the lower end portion, that is, the dimension t (above the surface of the lower half 3 with respect to the plate thickness t1 of the guide collar 14). When t ≧ t1), the projection 18 is horizontally formed from the surface.
Is provided.

Further, the projection 18 is provided with tapered surfaces 18a, 18b on both sides in the vertical direction (vertical direction), which are inclined so as to taper in the protruding direction.

Further, as shown in FIG. 1A or 3, the protrusions 18 are provided within a range other than the range where the tape-shaped recording medium 6 abuts on the guide insertion boss 13. When the protrusion 18 is manufactured, a part of the mold is undercut, but it can be removed from the mold at the time of molding by the tapered surface 18b.

Next, the guide collar 14 is, for example, a disc body made of stainless steel, and has a plate thickness t1 and a through hole 14b formed in a circular shape in the central portion. The diameter of the through hole 14b is the same as that of the protrusion 18 of the guide insertion boss 13.
In order to be able to pass through the portion where there is, the dimension is at least the total of the diameter dimension of the boss 13 and the protrusion height dimension of the protrusion 18.

Further, the tape guide 12 is formed by rolling a stainless steel plate material into an elongated cylindrical shape, and has V-shaped cuts formed by chamfering corners at both ends in the longitudinal direction of the joint 12a. The notch 12b is provided.

The notches 12b are provided at both ends in order to improve the assembling workability so that the guide boss 13 can be inserted from either side without distinction between upper and lower sides. Is.

When these are assembled by the guide insertion boss 13, the guide collar 14 and the tape guide 12, as shown in FIGS. 2 to 3, the guide insertion boss 13 has a circular shape at the center. The guide collar 14 having the through hole 14b is inserted into the through hole 14b, and the protrusion 18 is passed over to fit the lower part of the boss 13.

Then, the tape guide 12 is inserted into the guide insertion boss 13, and the lower notch 12b is positioned and attached so as to engage with the protrusion 18 of the boss 13. As a result, the seam 12 of the tape guide 12
Since a does not contact the tape-shaped recording medium 6, scratches on the tape-shaped recording medium 6 are prevented.

Thereafter, the guide collar 14 is placed on the tape guide 12, the upper half 2 is covered and screwed with a tapping screw as in the conventional case.

In this way, the tape guide 12 formed by rolling a plate material such as stainless steel at a low cost is positioned in a range in which the seam 12a does not abut the tape-shaped recording medium 6 and is mounted in the tape cassette. Become.

Even if the projection 18 for positioning the guide insertion boss 13 is provided, the through hole 14b of the guide collar 14 inserted into the lower end of the boss 13 can be formed into a circular shape which is easy to manufacture. Since the protrusions 18 are provided with the tapered surfaces 18a and 18b so that the guide collar 14
Can be easily fitted into the boss 13.

In this way, the tape guide 12 and the guide collar 14 in the tape cassette can be easily formed at low cost.

[0029]

As described above, the tape cassette according to the present invention is a tape cassette in which the tape-shaped recording medium is housed inside the upper and lower half assemblies, and the tape-shaped recording medium can be run. A guide insertion boss into which the tape guide to be guided is inserted is erected from the lower half, and the tape-shaped recording medium is at an upper position avoiding the guide brim fitted into the lower end of the guide insertion boss. Since the protrusion for positioning the tape guide is provided outside the abutting range, the tape guide and the guide collar can be used at a lower cost and easier to assemble than the conventional one, which is an excellent effect.

Further, since the projection is provided with a taper surface in the vertical direction, it is easy to insert the guide collar into the guide insertion boss, and the tape guide is
Since the notches for positioning are provided at the upper and lower ends, not only does the seam not touch the tape-shaped recording medium to damage the tape, but also the upper and lower ends have the notches so that it can be used as a guide insertion boss. It has an excellent effect that workability at the time of insertion is also improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a guide insertion boss in a first embodiment of a tape cassette according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the tape cassette according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a main part of the tape cassette according to the first embodiment of the present invention.

FIG. 4 is an exploded perspective view of a tape cassette according to a conventional example.

FIG. 5 is a partially cutaway front view of a tape guide portion of a tape cassette according to the conventional example.

FIG. 6 is a perspective view (a) of a plate material of the tape guide and a perspective view (b) in which it is rolled into a tubular shape.

FIG. 7 is an explanatory diagram for explaining how to assemble a tape guide according to a conventional example.

[Explanation of symbols]

 1 tape cassette, 2 upper half, 3 lower half, 6 tape recording medium, 12 guide tape, 12a joint, 12b notch, 13 guide insertion boss, 14 guide collar, 14b through hole, 18 positioning protrusion, 18a, 18b Tapered surface.

Claims (4)

[Claims] 1. A tape cassette in which a tape-shaped recording medium is housed inside an assembly of upper and lower halves, wherein a guide insertion boss into which a tape guide for guiding the running of the tape-shaped recording medium is inserted is provided. A protrusion is provided which stands up from the half and which positions the tape guide at an upper position avoiding the guide brim fitted in the lower end of the guide insertion boss and outside the range where the tape-shaped recording medium abuts. A tape cassette characterized by: 2. The tape cassette according to claim 1, wherein the projection has a taper surface in the vertical direction. 3. The tape cassette according to claim 1, wherein the tape guide is provided with notches for positioning at the upper and lower ends thereof. 4. The tape cassette according to claim 1, wherein the notch is provided at the position of the seam of the tape guide.