JPH10211984A - Storage case for tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve bonding strength by a method wherein a reinforcing means is provided in the vicinity of an end to which a sheet member is bonded so that a breaking force acting on the bonding part is born by the reinforcing means offset from the bonding part with respect to a force in the direction in which the end of the sheet member is turned up. SOLUTION: A claw part 20 being a reinforcing means is projected near the inner side of a bonding part 12 provided at the front end 8 of a cover part 4 so as to hold a part of an end of a sheet member 9. The member 9 is disposed over a recess 10 of a pocket part 6 in which the claw part 20 is provided to thermally bond the member 9 to the bonding part 12. Thus when an end of the member 9 is turned up, the member 9 is pressed from above by the claw part 20 so that upward forces are prevented from acting on the part 12. That is, forces directed to the part 12 is turned into forces along the sheet member 9 so that upward forces, by which the part 12 is easily broken, can be greatly reduced and the part 12 is reinforced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a tape cassette,
For example, the present invention relates to a hard-type storage case for storing a video tape cassette, and more particularly, to a reinforcing structure at a position near the inside of a fixed portion of a pocket portion formed by fixing both end portions of a sheet member provided on the case surface of the storage case. It is related to the storage case subjected to.

[0002]

2. Description of the Related Art A conventional storage case 1 is shown in FIG.
As shown in FIG. 5 and FIG. 16, a hard case body formed in a quadrangular shape is made of a polypropylene (PP) resin. Are integrally formed by injection molding.

As shown in FIG. 17, the storage case 1 integrally formed as described above is opened by rotating the lid 4 around the hinge 2 as a base, with the case body 3 as a base. 5 can be stored.

[0005] As shown in FIGS. 15 and 16, a pocket portion 6 having a recess 10 of a predetermined size having a predetermined step is formed substantially at the center of the surface of the cover 4 and the hinge 2.
It has a structure with.

[0005] The pocket portion 6 is provided at the rear end portion 7 of the hinge portion 2.
A transparent polypropylene (PP) sheet member 9 having a length reaching from the front end portion 8 of the lid portion 4 to the hinge portion 2 and the concave portion 10 substantially at the center of the lid portion 4 are provided. Are fixed by heat welding to form the pockets.

In the pocket 6, a case card 13 (see FIG. 16) indicating the model name of the product is stored when the product is shipped, and an index card or the like on which the recorded contents are written is stored on the surface of the cover 4 when the product is used. For the purpose of fixing, in actual use, not only an index card or the like but also paper on which various information is written or something similar thereto is inserted into this pocket.

As shown in FIG. 18, a method of inserting the card 13 and the like into the pocket portion 6 is as follows: the edge 14 of the sheet member 9 in the insertion direction of the pocket portion 6 is moved away from the concave portion 10 by a finger. It is general that the pocket is flipped up and inserted while a gap is created between the recess 10 and the sheet member 9.

As shown in FIG. 19, the direction in which the finger is hooked on the edge 14 of the sheet member 9 on the concave portion 10 having the step with the surface of the lid portion 4 to open the pocket is as shown in FIG.
Is approximately the same as the direction of the breaking force applied to

[0009]

However, when a gap is formed by placing a finger on the edge 14 of the sheet member 9 in the direction in which the pocket portion 6 is inserted, as shown in FIGS. The direction in which the pocket is opened by catching a finger on the edge 14 (see FIG. 18) is substantially the same as the direction of the breaking force applied to the fixing portion 12, and therefore, is upward with respect to the fixing portion 12. A breaking force is applied in a direction that facilitates peeling.

Therefore, when an excessive force is applied to the edge 14 of the sheet member 9, the sheet member 9 is torn from the fixing portion 12 on the front end 8 side of the lid portion 4, and a torn portion 15 is generated. Sometimes.

Alternatively, even if the lid 4 is not torn, irregularities may occur in the welding state of the fixing portion 12 on the front end 8 side of the lid 4, causing an irregular gap between the surface of the lid 4 and the sheet member 9,
The edge of the sheet member 9 protruding from the surface is turned up,
The problem is that these conditions can be further exacerbated.

Therefore, there is a problem to be solved in the fixing structure of the fixed portion of the sheet member forming the pocket portion provided on the surface of the storage case, particularly the fixed portion side in which the gap is formed by turning up the sheet member. ing.

[0013]

In order to solve the above problems, a tape cassette storage case according to the present invention is a storage case for storing a tape cassette, wherein a predetermined step is provided at an appropriate position on the surface of the storage case. A concave portion having a predetermined size is formed, a sheet member is disposed in the concave portion, a pocket portion is formed by fixing both end portions of the sheet member, and reinforcing means is provided inside the vicinity of the fixed end portion. That is.

By providing the reinforcing means in the vicinity of the end where the sheet member is fixed as described above, the breaking force applied to the fixed portion is reduced with respect to the force in the direction of turning up the edge of the sheet member. It can be imposed on the reinforcing means deviated from the above, and as a result, the fixing strength can be improved.

[0015]

Next, a tape cassette storage case according to the present invention will be described with reference to the drawings.
It should be noted that the same components as those in the prior art are described with the same reference numerals.

As shown in FIGS. 1 and 2, a tape cassette storage case 1A according to a first embodiment of the present invention has the same shape as the storage case described in the prior art, and has a square hard disk shape. The hard case main body has a structure in which a case main body 3 and a lid 4 are integrally formed by injection molding with a hinge (2) as a boundary with a polypropylene (PP) resin. From the hinge portion 2 to the lid portion 4, a pocket portion 6 including a concave portion 10 having a predetermined size and a predetermined size is provided at a substantially central position on the surface thereof.

The pocket portion 6 has a concave portion 10 having a predetermined size with a step difference from the surface of the lid portion 4 and a transparent polypropylene (PP) sheet member 9 disposed above the concave portion 10. The end portions 7 and the fixing portions 11, 12 at both ends of the front end portion 8 of the lid portion 4 are fixed by heat welding to form a pocket. The step of the concave portion 10 is formed at a depth equal to or greater than the thickness of the sheet member 9 and becomes flush with or less than the surface of the lid portion 4 when the sheet member 9 is provided.

The fixing portion 1 provided on the front end 8 of the lid 4
At a position near the inner side of 2, a structure is provided in which a claw portion 20 is provided as a reinforcing means protruding so as to sandwich a part of the end of the sheet member 9.

The claw portion 20 is formed at least on the surface of the lid portion 4 and has a structure protruding in the direction of the concave portion 10 having a step, and when the edge of the sheet member 9 is turned up, 9 is held from above to avoid an upward force on the fixing portion 12. The claw portion 20 will be described later.

As shown in FIG. 3, the pocket portion 6 provided with the claw portion 20 in a part of the concave portion 10 of the lid portion 4 has a product model name at the time of product shipment as described in the prior art. Is stored, and when the product is used, an index card or the like on which the recorded contents are written is placed on the cover 4.
For the purpose of fixing to the surface, not only an index card or the like but also paper or a similar material on which various information is written is inserted into this pocket in actual use.

As shown in FIGS. 4 and 5, the claw portion 20, which is a reinforcing means, is moved from the front end portion 8 to which the heat is welded to the fixing portion 1.
2, a claw 21 formed at or below the surface of the lid 4 and protruding in the direction of the recess 10; And a hole 22 formed as described above. The hole 22 is a hole for preventing undercut when the case body 3 and the lid 4 are integrally formed by injection molding (see FIG. 2). Since the hole 22 has a structure closed by the sheet member 9 forming the pocket portion 6 (see FIG. 5), even if it is an opening, there is no problem in use.

As shown in FIG. 6, in the pocket portion 6 provided with the claw portion 20, the sheet member 9 is disposed so as to cover the hole 22 on the concave portion 10, and is thermally welded at the fixing portions (11, 12). It is completed if it is fixed.

The pocket portion 6 having such a structure is
As shown in FIG. 7, a breaking force in the same direction of breaking the fixing portion 12 is applied directly to the fixing portion 12 with respect to a force in the direction of opening the pocket by flipping the edge of the sheet member 9 of the pocket portion 6. The sheet member 9 pressed against the lower side of the claw 21
Take the part.

Accordingly, the breaking force is shown in FIG.
Is pulled to the left, and is turned upward by the claw 21 to open the pocket. That is, the breaking force is
1, the force applied to the fixing portion 12 is a force in a direction along the sheet member 9 (an arrow in the direction of the breaking force in FIG. 7),
The upward force that easily breaks the fixing portion 12 is extremely reduced,
As a result, the fixing portion 12 is reinforced.

Next, a tape cassette storage case according to a second embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 8 and 9, the storage case 1B for a tape cassette according to the second embodiment of the present invention has the same shape as the storage case described in the first embodiment, and is formed in a square shape. The hard case main body is formed by integrally injection-molding the main body case portion 3 and the lid portion 4 on the left and right sides of the hinge portion 2 with a polypropylene (PP) resin. A structure having a pocket portion 6 having a predetermined width at a substantially central position on the surface of the hinge portion 2 and the lid portion 4 is provided.

The pocket portion 6 is provided with a band-shaped concave portion 10 having a predetermined width which is depressed from the surface of the cover portion 4.
A structure in which a polypropylene (PP) sheet member 9 is fixed to the fixing parts 11 and 12 provided on the rear end part 7 of the hinge part 2 and the front end part 8 of the lid part 4 by heat welding to form a pocket. ing.

Further, when the edge of the sheet member 9 is turned up to a position closer to the inside than the fixing portion 12 of the heat-welded front end portion 8, a reinforcing means for preventing an upward force from being applied to the fixing portion 12. This is a structure in which a bridge portion 30 is provided.

The bridging portion 30, which is a reinforcing means, is shown in FIG.
As shown in FIGS. 0, 11 and 12, the concave portion 10 provided on the surface of the lid portion 4 at a position near the inside of the fixing portion 12 deeper than the fixing portion 12 of the front end 8 to be heat-welded. The bridge 31 includes a bridge 31 having a shape crossing the bridge 31 and a hole 32 having a through hole in a lower portion of the bridge 31. This hole 32 is a hole for preventing undercut when integrally injection-molding.

As shown in FIG. 13, the pocket portion 6 provided with such a bridge portion 30 is provided with the sheet member 9 so that the hole 32 (see FIG. 10) is closed on the concave portion 10 so as to cover the lower side of the bridge 31. Is completed, and is fixed by welding at the fixing portion 12.

The pocket portion 6 having such a structure is
As shown in FIG. 14, in the direction in which the sheet member 9 of the pocket portion 6 is turned up, the breaking force of the fixing portion 12 is applied to a portion of the sheet member 9 pressed against the lower side of the bridge 31.

Therefore, the breaking force is shown in FIG.
2 acts to the left and acts in the direction of opening the pocket about the bridge 31. That is, the upward breaking force is suppressed by the bridge 31, and the force on the fixing portion 12 is only the force pulling the fixing portion 12 rightward in FIG. 14, and the upward force that easily breaks the fixing portion 12 is extremely large. It is the same as reinforcing the fixing portion 12 as a result.

[0033]

As described above, in the storage case according to the present invention, the welding reinforcing means is provided at a position near the fixing portion of the sheet member forming the pocket portion provided on the surface of the lid portion of the case. When the edge of the sheet member is turned up, by applying the breaking force applied to the fixing portion to the welding reinforcing means, the welding strength of the fixing portion can be improved, and the pocket can be broken even under severe conditions. There is an effect that reliable and reliable products can be supplied.

[Brief description of the drawings]

FIG. 1 is a perspective view in which a storage case according to a first embodiment of the present invention is integrally formed by injection molding.

FIG. 2 is a perspective view when injection molding is performed on the same body.

FIG. 3 is a perspective view showing a state in which an index card and the like are sandwiched in a storage case injection-molded in the same body.

FIG. 4 is an enlarged perspective view of a pocket formed in the same body.

FIG. 5 is a sectional view taken along line AA in FIG.

FIG. 6 is a partially enlarged perspective view showing a state where a sheet member is incorporated in the pocket portion.

FIG. 7 is an explanatory view showing a breaking force direction when a gap is formed in a sheet member forming the pocket portion.

FIG. 8 is a perspective view of a storage case according to a second embodiment of the present invention, which is integrally formed by injection molding.

FIG. 9 is a perspective view when injection molding is performed on the same body.

FIG. 10 is an enlarged perspective view of a pocket formed in the same body.

11 is a sectional view taken along line BB in FIG.

FIG. 12 is a sectional view taken along line CC in FIG. 4;

FIG. 13 is a partially enlarged perspective view of a sheet member forming the pocket portion.

FIG. 14 is an explanatory view showing a direction of a breaking force when a gap is formed in a sheet member forming the pocket portion.

FIG. 15 is a perspective view of a conventional storage case assembled by injection molding integrally.

FIG. 16 is a perspective view when injection molding is performed on the same body.

FIG. 17 is a perspective view showing a state in which a storage case formed by injection molding into the same body is assembled and opened, and a tape cassette.

FIG. 18 is an enlarged view of a main part when a sheet member forming a pocket formed in the same body is spread with a finger to create a gap.

FIG. 19 is an explanatory view showing a direction of a breaking force when a gap is formed in a sheet member forming the pocket portion.

FIG. 20 is an explanatory view showing a state where a fixed portion of the sheet member is broken.

[Explanation of symbols]

1, 1A, 1B; storage case, 2; hinge, 3; case body, 4; lid, 5; tape cassette, 6; pocket, 7; rear end, 8; front end, 9; Element,
10; concave portion, 11; fixed portion, 12; fixed portion, 13; case card, 14; edge, 20; claw portion, 21; claw, 22;
Hole, 30; bridge portion, 31; bridge, 32; hole

Claims (3)

[Claims] 1. A storage case for storing a tape cassette, wherein a concave portion having a predetermined size is formed at an appropriate position on the surface of the storage case with a predetermined step, and a sheet member is disposed in the concave portion. A tape cassette storage case, wherein both end portions of a member are fixed to form a pocket portion, and reinforcing means is provided inside the vicinity of the fixed end portion. 2. The tape cassette storage case according to claim 1, wherein said reinforcing means is a claw projecting in the vicinity of an inner side of a fixing portion of said sheet member. 3. The tape cassette storage case according to claim 1, wherein said reinforcing means is a bridge portion provided along the inside of the fixed portion of said sheet member.