JPS6336554Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tape cartridge equipped with a tape holding piece that prevents the tape from coming loose, and is an improvement in the means for fixing the tape holding piece.

This type of tape holding piece is made of a thin strip-shaped plastic plate, and its base end is fixed to the wall inside the main case of the tape cartridge, and its tip is elastically brought into contact with the tape guide member by sandwiching the tape. This prevents the tape from coming loose on the front side of the main body case. The base end of the tape holding piece is generally adhesively fixed to the wall inside the main body case with double-sided adhesive tape. This is because it is easier to fix even in narrow places within the main body case compared to screw fixing or heat welding methods.

However, as tape cartridges become more compact, space constraints within the main body case become more and more severe, and there is no longer enough space to incorporate the tape retainer, and the proximal end of the tape retainer is fixed with adhesive. It has become difficult or even impossible to specially form and install walls. Therefore, it is becoming necessary to use an existing wall in the vicinity of the installation location of the tape holding piece as a wall for adhering and fixing the tape holding piece. The wall to which the base end of the tape holding piece is adhesively fixed is rarely a straight wall that is conveniently flat and has a large adhesive area, but is often curved or multifaceted. When gluing and fixing the base end of the presser piece,
There was a problem. In other words, if the wall has a curved surface or multifaceted shape, the base end of the tape holding piece should be bent to fit the curved surface or multifaceted shape of the wall using its elasticity, and then bonded. The proximal end portion to which this is applied is likely to peel off due to elastic restoring force after adhesion.

This invention focuses on this fact, and even when the wall surface to which the base end of the tape presser piece is adhered has a curved or multifaceted shape, the entire base end of the tape presser piece will not peel off from the wall surface. The purpose is to ensure that the adhesive and fixed state is well maintained.

The details will be explained below based on the drawings.

The drawing shows an example of a small video tape cartridge, the main body case 1 of which is made up of a plastic upper case (not shown) and a lower case 1a, which are joined together with screws or the like in a lid-like manner. Tape reels 2, 2 are rotatably installed on the left and right sides, and a tape 3 is wound between these tape reels 2, 2. The tape 3 is guided by tape guide members 4 and 5 made up of two idler rollers made of plastic on the left side of the figure, and tape guide members 6, 7, and 8 made of idler rollers made of plastic on the right side.
The tape is led out from one tape reel 2 to the outside of the front wall 9 of the main body case 1, and then wound onto the other tape reel 2. Then, a tape presser piece 10 is placed between the tape guide members 4 and 5 on the left side of the lower case 1a and between the tape guide members 7 and 8 on the right side, and the tape presser piece 10 is held between the tape 3 and the tape guide member 4. , 8 to prevent the tape 3 from coming loose toward the front side of the main case.

In Figures 2 and 3, the tape holding piece 1
0 is entirely made of a thin plastic or metal elastic plate, such as a polyethylene resin sheet, and is formed into an L-shape when viewed from the front.
a is formed in a horizontally elongated shape having a vertical width that is approximately the same as the height dimension of the front wall 9 of the lower case 1a, and the tip portion 10b is vertically long and has a vertical width that is approximately the same as the vertical length of the tape guide member 4. It is formed into a band shape. A double-sided adhesive tape 11 is adhered to one side of the proximal end 10a of the tape holding piece 10, and is adhesively fixed to each inner surface of the left and right side walls 9a, 9b of the front wall 9, with each tip 10b sandwiching the tape 3. It comes into elastic contact with the tape guide members 4 and 8, respectively.
A slippery material 12, such as a tetrafluoroethylene sheet, is attached to the tip portion 10b.

When adhesively fixing the tape holding piece 10 to the front wall 9, if the tape holding piece 10 has a sufficiently flat straight wall surface such as the right side wall part 9b of the front wall 9 to adhesively fix the entire base end 10b of the tape holding piece 10. There is no particular problem with this, but the flat surface 13 like the left side wall 9a of the front wall 9
If there are only a few portions and the other portions are formed into concave curved surfaces 14, the above-mentioned problem will occur. That is, on the left side wall 9a of the front wall 9, the base end 10a of the tape holding piece 10 is bent to follow the concave curved surface 14 of the wall 9a using its elasticity, and then fixed by adhesive. However, in such a bonded state, the base end portion 10a tries to return to its original straight flat plate shape due to elasticity, and the bonded surface peels off. Incidentally, the left side wall portion 9a is connected to the tape reel 2.
It is formed into a curved shape to follow the outer periphery of the flange.

Therefore, in this proposal, the base end 1 of the tape holding piece 10 is
It is characterized in that one or more cuts 15 are made in the upper and lower width directions of the double-sided adhesive tape 11 and the base end 10a to weaken the elasticity of the base end 10a.

In such a case, the base end 10 of the tape holding piece 10
a can be easily bent along the concave curved surface 14 of the wall portion 9a, and the entire portion can be attached almost evenly to the concave curved surface 14, and the adhesive strength of the double-sided adhesive tape 11 is sufficient for adhesion in this bent state. It is firmly held in place and does not peel off.

The number of cuts 15 is increased or decreased depending on the curvature of the concave curved surface 14 of the wall portion 9a and the thickness of the tape holding piece 10.

The notch 15 is located at the base end 10 of the tape holding piece 10.
This is preferable because the elasticity of a can be effectively weakened, and almost the entire surface of the base end 10a can be used as an adhesive surface, so that the adhesive area is hardly reduced. However, it is not limited to this, and in addition, for example, the fourth
A hole 16 may be made as shown in the figure, a number of parallel notches 17 may be made as shown in FIG.
0a Various elasticity reducing means can be considered to reduce the cross-sectional area of the proximal end portion 10a, such as by reducing the overall thickness of the proximal end portion 10a.

Note that the wall portion 9a to which the base end portion 10a of the tape holding piece 10 is adhesively fixed is attached to the flat surface 1 as shown in the illustration.
3 and the concave curved surface 14 are continuous, when fixing the tape presser piece 10, the tape presser piece 10 should be fixed so that it correctly follows the edge A where the flat surface 13 and the concave curved surface 14 intersect. It is desirable to plastically deform it into a U-shape in advance, as shown in FIG. 6, so that the bent portion 10c matches the edge A.

In the illustrated example, the concave curved surface to which the proximal end 10a is bonded is arranged such that the base end 10a of the tape presser piece 10 bonded to the concave curved surface 14 of the wall portion 9a is substantially flush with the inner surface of the concave curved surface 14. 14 is thinned by the thickness of the base end 10a and the double-sided adhesive tape 11.

As explained above, according to this invention, a cut 15 or a hole 16 is provided in the base end 10a to which the tape holding piece 10 is adhesively fixed.
The cross-sectional area of 0a was reduced to weaken the elasticity. Therefore, even if the wall surface to which it is adhesively fixed is curved or multifaceted, the base end portion 10a can be easily bent to conform to the shape of the wall surface, improving assembly workability, and the bending portion can be elastically restored. It has the advantage that the bonded area does not peel off due to force, and the adhesive and fixed state can be maintained well.

[Brief explanation of the drawing]

The drawings show an embodiment of the tape cartridge according to the present invention, and FIG. 1 is a plan view with the upper case and front cover removed, FIG. FIG. 3 is a perspective view of the tape presser piece before installation and the part into which the tape presser piece is installed. 4 to 6 are perspective views showing other modified embodiments of the tape holding piece. DESCRIPTION OF SYMBOLS 1... Main body case, 3... Tape, 4... Tape guide member, 10... Tape holding piece, 10a...
...Proximal end of tape holding piece, 10b...Tip end of tape holding piece, 15...Notch, 16...hole, 17
... Notches.

Claims (1)

[Claims for Utility Model Registration] (1) The base end 10a of the tape holding piece 10 made of an elastic plate is adhesively fixed to the wall inside the main body case 1,
In a tape cartridge in which the tip end 10b of the tape holding piece 10 is brought into elastic contact with the tape guide member 4 in the main body case 1 with the tape 3 sandwiched therebetween, the base end 10a of the tape holding piece 10 is attached to the base end 10a of the tape holding piece 10. A tape cartridge characterized in that a tape cartridge is further provided with means for reducing elasticity by reducing the cross-sectional area of the tape cartridge. (2) Tape holding piece 1 as a means to reduce elasticity
1. The tape cartridge according to claim 1, which has a notch 15 in the base end 10a of the tape cartridge. (3) Tape holding piece 1 as a means to reduce elasticity
1. The tape cartridge according to claim 1, which has a hole 16 in the base end 10a of the tape cartridge.