WO2004087534A1

WO2004087534A1 - Cassette storage case

Info

Publication number: WO2004087534A1
Application number: PCT/JP2004/004694
Authority: WO
Inventors: Sachiyo Fukuizumi
Original assignee: Sony Corporation
Priority date: 2003-03-31
Filing date: 2004-03-31
Publication date: 2004-10-14
Also published as: JP3879690B2; JP2004299755A

Abstract

A cassette storage case capable of securing sufficient impact absorbing function without impairing productivity, wherein impact absorbing ribs (204) elastically supporting the upper surface of a stored tape cassette (C) and a cassette receiving rib (205) limiting the deformation of the impact absorbing ribs (204) exceeding the elastic limit thereof are formed on the inner surface of the top board part (201) of the cover body (20) of the cassette storage case (1) integrally with each other. The impact absorbing ribs (204) elastically deform in the range of a clearance (H1) between the tape cassette (C) and the cassette receiving rib (205) to absorb drop impact for the protection of the tape cassette (C). The cassette receiving rib (205) limits the deformation amount of the impact absorbing ribs (204) to maintain the stable impact absorbing function for a long period.

Description

Cassette storage case

Technical field

Light

The present invention relates to a cassette storage case suitable for storing and storing a tape cassette for, for example, a video cassette, and more specifically, can effectively absorb a drop impact and avoid damage to the cassette. Related to tape storage case.

Kyokyo technology

Video tape cassettes for broadcasters and consumers are generally stored in a separate synthetic resin storage case when stored as a library. However, tape cassettes are large in size and heavy in weight. Therefore, while broadcasting stations and consumers are preparing for shooting or playback in the library or indoors or outdoors, the storage case containing the tape cassette may be mistakenly placed on a hard floor or road such as concrete. It may fall up.

Conventionally, as a countermeasure against a shock when the storage case is dropped, for example, an impact buffer for absorbing a drop impact by elastic deformation is provided integrally with a peripheral portion of the storage case (see Patent Document 1 below), or a storage case. There is a form in which a sheet-like elastic member filled with air is provided on the inner bottom surface to hold the tape cassette in pressure contact (see Patent Document 2 below).

Also, a spring member such as a leaf spring or a coil spring is arranged on the bottom surface inside the storage case to elastically support the tape cassette reel, and A structure that avoids damage to the reel from an impact (see Patent Document 3 below), and a pos that presses the upper surface of the tape cassette at the four inner corners of the lid of the storage case, and a drop impact due to the elastic deformation of the entire lid There is a form of absorption (see Patent Document 4 below).

Patent Document 1: Japanese Patent Application Laid-Open No. H8-252530

Patent Document 2: JP-A-9-140065

Patent Document 3: Japanese Patent Application Laid-Open No. H10-2588888

Patent Document 4: Japanese Patent Application Laid-Open No. 2000-1779-176

However, in the storage case described in Patent Document 1, since the shock absorbing portion is formed so as to protrude upward and downward from a flange portion on the periphery of the case, it is extremely difficult to remove the shock absorbing portion from the mold. In addition, since the storage case cannot be formed in one shot, it is necessary to devise a manufacturing method such as insert molding a separately manufactured rib structure into the case body. There is a problem that is complicated.

In addition, the storage cases described in Patent Documents 2 and 3 have a structure in which an elastic member such as an air encapsulant or a panel is provided as a separate component inside the case. It has a problem that it leads to increase and complexity, and poor workability and productivity.

Further, in the storage case described in Patent Document 4, there is no great difficulty in moldability and workability of the case itself. On the other hand, when the area of the case lid decreases with the downsizing of the case, the elastic function of the lid decreases, and a sufficient action of elastically supporting the cassette inside the case is not obtained. For this reason, a cassette storage case with a shock absorbing structure that can sufficiently cope with the miniaturization of the case is desired.

The present invention has been made in view of the above-described problems, and has as its object to provide a cassette storage case capable of securing a sufficient shock absorbing function without impairing productivity. Disclosure of the invention

In order to solve the above problems, the cassette storage case of the present invention is configured such that a lip body that is in contact with the outer surface of the tape cassette stored in the storage space is integrally formed on the inner surface of the case forming the storage space for the tape cassette. It is characterized by being formed in a special way.

In the present invention, the lip body formed on the inner surface of the case is brought into elastic contact with the outer surface of the tape cassette, so that the impact at the time of dropping etc. is efficiently absorbed and the rib body is elastically deformed to efficiently protect the tape cassette I try to do it. Further, since the rib body is integrally formed on the inner surface of the case, the case can be formed by one-shot molding operation, thereby preventing a decrease in productivity. .

Preferably, the rib body is formed of a strip standing on the inner surface of the case. This is because the elasticity is ensured by utilizing the thinness of the strip. Therefore, the elastic contact force with the tape cassette can be arbitrarily adjusted by appropriately selecting the number, height, and thickness of the strips.

In order to obtain a proper elastic support action of the tape cassette, it is necessary to provide a repeatable (reproducible) elasticity of the rib to the tape cassette. Therefore, in the present invention, the tip of the rib body is formed in a curved shape. As a result, the tape cassette can always be supported in the same posture, and a stable shock absorbing function can be provided over a long period of time. On the other hand, depending on the magnitude of the impact, it is expected that the rib body will be deformed beyond its elastic limit. Preferably, it is provided. Thereby, the deformation amount of the rib body is kept constant, and the durability of the rib body is enhanced. The auxiliary rib is formed integrally with the surface on which the rib body is formed. To prevent the moldability of the case from deteriorating.

It is preferable that the height of the auxiliary rib is set to a height at which the rib body does not reach its intrinsic limit. Thereby, the durability of the rib body can be increased. In addition, it is also possible to give the above-mentioned catching rib itself an elastic function. Also in this case, it is necessary to take care that the rib does not reach the elastic limit when the cassette is elastically contacted. Further, by forming the auxiliary rib thicker than the lip body, deformation of the auxiliary rib when receiving a tape cassette at the time of impact can be suppressed.

Further, in another cassette storage case of the present invention, a storage space for storing a tape cassette includes a box having a side wall, a lid having a side wall and covering the face member, a west body and the lid. A cassette housing case formed of a connecting portion which is connected to the body via a hinge and serves as one side wall of the lid, wherein a rib body in contact with an upper surface portion of the tape cassette; It is characterized in that catching ribs facing each other with a gap in the surface are provided upright on the inner surface of the lid.

With this configuration, a high shock absorbing function in the thickness direction of the tape cassette stored in the storage space can be obtained, and the shock absorbing function can be maintained for a long period of time, and further, moldability and productivity are improved. An intact cassette storage case can be configured. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an overall perspective view showing a deployed state of a cassette storage case 1 according to an embodiment of the present invention.

FIG. 2 is a plan view of the cassette storage case 1 in an unfolded state.

FIG. 3 is a sectional view taken along the line [3] — [3] in FIG.

FIG. 4 is a side sectional view of the cassette storage case 1 in a closed state. FIG. 5 is a front view of the face 10 of the cassette storage case 1.

FIG. 6 is a sectional view taken along the line [6]-[6] in FIG.

FIG. 7 is a sectional view taken along the line [7]-[7] in FIG.

FIG. 8 is a sectional view taken along the line [8]-[8] in FIG.

FIG. 9 is a cross-sectional side view showing a play state of the cylindrical portion 105 of the face body 10 with respect to the reel R of the tape cassette C stored in the cassette storage case 1.

FIG. 10 is a cross-sectional view of a main part when the cassette storage cases 1 are stacked up and down.

FIG. 11 is a sectional view taken along the line [1 1]-[1 1] in FIG. FIGS. 12 (A) and 12 (B) are cross-sectional views of a principal part for explaining the operation of the shock absorbing rib 204 and the cassette receiving rib 205.

FIG. 13A and FIG. 13B are cross-sectional views of a principal part illustrating a modified example of the configuration of the shock absorbing rib and the cassette receiving lip. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 11 show the overall configuration of a cassette storage case 1 according to an embodiment of the present invention. Here, Fig. 1 is an overall perspective view showing the unfolded state (open state) of the cassette storage case 1, Fig. 2 is a plan view of the same, and Fig. 3 is a sectional view taken along the line [3]-[3] in Fig. 2. Fig. 4, Fig. 4 is a sectional side view showing the closed state of the cassette storage case 1, Fig. 5 is a view in the direction of the line [5]-[5] in Fig. 2, and Fig. 6 is [6]-[ 6] FIG. 7 is a sectional view taken along the line [7]-[7] in FIG. 2, and FIG. 8 is a sectional view taken along the line [8]-[8] in FIG.

The cassette storage case 1 is composed of a face 10, a lid 20, and a connecting portion 30. Have. The box 10 and the connecting portion 30 are connected via a thin hinge 91, and the lid 20 and the connecting portion 30 also have a thin hinge 92. (Figs. 2 and 3). The face body 10, the lid body 20, and the connecting portion 30 are integrally formed as an injection molded body of a synthetic resin material such as polypropylene.

Four sidewalls 102 f, 102 b, 102 s, and 102 s are formed from the periphery of the bottom plate 101 of the box 10 to rise, and a tape force set (not shown) is formed. Are partitioned. Of these, the side wall 102 f functions as a front wall, 102 b functions as a rear wall, and 102 s functions as left and right side walls. On the other hand, three side walls 202f, 202s and 202s are formed to rise from the periphery of the top plate 201 of the lid 20. Of these, the side wall 202f constitutes a front wall portion in a closed state, and 202s functions as left and right side wall portions.

The cassette storage case 1 has a storage space 2 for storing the tape cassette formed therein by covering the housing 10 with the lid 20 (FIG. 4). In this closed state, the side walls 20 2f and 202 s of the lid 20 are located outside the side walls 102 f and 102 s of the The connecting portion 30 is located outside the side wall 102b. The opening / closing lock mechanism between the face body 10 and the lid body 20 includes a side wall opening part 40 and a side lock part 50.

The side wall opening 40 is provided with engaging holes 41, 41 (FIG. 5) formed on the left and right sides of the front wall 10 2 f of the housing 10, and the top plate of the lid 20. It is constituted by engaging claws 42, 42 (FIG. 7) standing upright on the inner side of the portion 201 and at positions corresponding to the portions where the engaging holes 41, 41 are formed. As shown in FIG. 7, the engagement claws 42 are erected on the inner surface side of the top plate 201, and are provided with a gap of the same size as the wall thickness of the front wall 102f of the box 10. Front wall of lid 20 0 2 f Inner side Facing.

When the case is closed, the front wall portion 102 f of the housing 10 is sandwiched between the front wall portion 202 f of the lid 20 and the engagement claw 42, and the engagement hole is formed. 41 and the engaging claw 42 engage with each other. As a result, a constant engaging force is generated between the box 10 and the lid 20.

On the other hand, the side lock portion 50 is composed of a flap plate 51 connected to an edge of the bottom plate portion 101 of the box 10 at a substantially central front side via a hinge 93, and a top plate of the lid body 20. A locking portion 53 is formed substantially at the center of the outer surface of the front wall portion 202f of the portion 201 (FIGS. 2 and 3).

Then, when the case is closed, the hook portion 52 of the flap plate 51 is folded back via the hinge 93 so as to overlap the front wall portion 202 of the lid 20 and the above-mentioned locking portion. By locking 53 with each other, the integrated state between the box 10 and the lid 20 is locked (FIG. 4).

In the present embodiment, a concave portion 54 is provided by partially removing a corner between the front wall portion 202 f of the lid 20 and the top plate portion 201. The opening operability of the flap plate 51 in the locked state is enhanced.

Next, the shock absorbing mechanism of the cassette storage case 1 according to the present embodiment will be described.

External force such as a drop impact was applied to the cassette storage case 1 on the outer periphery of the bottom plate 101 of the face body 10 and the top plate 201 of the lid 20 and the outer periphery of the connecting part 30. At this time, shock absorbers 60, 70 and 80 are provided to protect the tape cassette housed therein from shock due to elastic deformation. These shock absorbers 60, 70, 80 are formed integrally with the bottom plate 101, the top plate 201, and the connecting portion 30, respectively.

Fig. 8 shows the structure of the shock absorber 60 provided on the bottom plate 101 of the face body 10. Show. The shock absorber 60 is a continuous formed of the inner peripheral groove 61 and the outer peripheral groove 62 along the peripheral edge of the bottom plate 101, the peripheral protrusion 63 and the outer protrusion 64. It is composed of The outer peripheral groove 62 is formed deeper than the inner peripheral groove 61, and the inner peripheral protrusion 63 and the outer peripheral protrusion 64 are formed at the same height. Further, the outer peripheral side protruding portion 64 is formed to be curved and rise.

The shock absorbing function of the shock absorber 60 is mainly performed by the elastic deformation of the outer peripheral side projection 64 inward. When the case is closed and the end of each side wall of the lid 20 is accommodated in the inner peripheral groove 61, the inner peripheral side projection 63 is formed between the case 10 and the lid 20. It is provided to prevent dust and the like from entering through the gap between them. The shock absorber 80 provided in the connecting portion 30 is also configured with the same design concept.

On the other hand, as shown in FIG. 7, the impact absorber 70 provided on the top plate portion 201 of the lid 20 has a projection 72 that is curved and rises, 2 and a groove 71 formed between the front wall portion 202 f. Then, a shock absorbing function can be obtained by the elastic deformation of the protrusion 72 inward.

Next, the internal configuration of the cassette storage case 1 will be described.

On the inner surface side of the bottom plate 101 of the box 10, concentrically with a pair of reels of the tape cassette to be housed, it is raised as if embossed and has a very low and high truncated cone-shaped lower convex portion 10. 3 are respectively formed, and furthermore, the upper convex portion 104 is formed by raising the center of the upper surface. A cylindrical portion 105 is erected at the center of the upper surface of the upper convex portion 104.

A plurality of slits 106 are formed in the standing direction from the substantially central portion of the cylindrical portion 105 to the distal end thereof, and the cylindrical portion 105 is formed by these slits 106. For example, it is divided into four in the circumferential direction. FIG. 9 is a side cross-sectional view showing the state of play of the cylindrical portion 105 with respect to the reel R of the tape cassette C stored in the cassette storage case 1. As shown in FIG. 9, the tape cassette C stored in the storage space 2 has the reel R supported by the upper convex portion 104 of the bottom plate 101 and the upper convex portion 1 by the reel holding panel S. 0 It is biased to the 4 side. The cylindrical portion 105 is loosely inserted into the hub hole Rh of the reel R.

The hub hole R h of the reel R is formed concentrically with the driving claw hole R h1 and the driving claw hole R h1, on which the reel driving claw is formed on the inner peripheral surface. The cylindrical portion 105 is formed at a height that reaches the reference hole portion Rh2.

With this configuration, when an external force is applied in the thickness direction of the tape cassette C, the upper convex portion 104 elastically deforms to the outer surface side of the bottom plate 101 via the lower convex portion 103, and the reel Acts to protect R from impact. Also, when an external force is applied in the direction perpendicular to the thickness direction of the tape cassette C, the elastic deformation of the tip of the cylindrical portion 105 that is loosely inserted into the reference hole R h2 of the hub hole R h This protects the reel R from impact. Since the tip of the cylindrical portion 105 is divided by the slit 106, its elastic deformability can be increased to obtain an effective shock absorbing effect.

Next, a bulge 107 is integrally formed on the inner surface of each of the side walls 102 f, 102 b, and 102 s of the west body 10. The bulging portion 107 has a tapered surface in which the bulging amount increases downward from the end of the side wall so as to prevent the tape cassette from being stored in the box 10. Also, when an external force is applied in a direction perpendicular to the thickness direction of the tape cassette, the outer surface of the tape cassette abuts on the bulging portion 107, and the side walls 102f, 102b, 102 s is elastically deformed outward, thereby protecting the tape cassette from the external force. Further, each side wall 102 f, 102 b, and 102 s of the face body 10 has a missing portion 108 in which an arbitrary part is partially missing. The takeout of the tape cassette is ensured via 08. On the other hand, on the outer surface side of the bottom plate portion 101, an annular leg portion 109 supporting the box 10 is integrally formed. The projecting amount of the leg portion 109 is substantially equal to the depth of the concave portion 203 formed on the outer surface of the top plate portion 201 of the lid body 20. The projection range of 9 is within the formation range of the recessed portion 203 of the top plate portion 201.

As a result, when the cassette storage cases 1 are stacked in a plurality of stages, as shown in FIG. 10, the top plate portion 201 and the bottom plate portion 101 of the vertically adjacent cassette storage case 1 are separated from each other. The two are in contact with each other, and the leg portions 109 are accommodated in the recesses 203 to suppress displacement in the direction of the lamination surface. Next, the configuration of the lid 20 will be described. A shock absorbing rib 204 as a rib according to the present invention and a cassette receiving rib 205 as an auxiliary rib are provided on the inner side of the top plate 201 of the lid 20. (Figures 1 to 4, Figure 11) o

The shock absorbing rib 204 is integrally formed on the inner surface of the top plate 201 as a rectangular strip oriented to the front wall portion 202 f side, and the side wall portion 202 extends. A plurality is provided along the direction.

In the natural state, the height of the shock absorbing rib 204 is formed so as to be in contact with the upper surface of the tape cassette housed in the face body 10 when the case is closed. When the shock absorbing rib 204 is elastically deformed, the tape cassette is pressed against the bottom plate 101 of the face body 10 so as to elastically contact the upper surface of the tape cassette. The elastic contact force with the tape force set is arbitrarily adjusted by appropriately selecting the number, height, wall thickness, and the like of the impact absorbing ribs 204. The tip of the impact absorbing rib is a curved portion 204r, which is curved in an arc inside the lid 20 (Fig. 11). In addition, by providing a curved portion 204 r at the tip of the shock absorbing rib 204, it is possible to provide a repeatability (reproducibility) to the elastic contact position of the shock absorbing rib 204 with the tape cassette. Therefore, the tape cassette is always supported in the same posture, and a long-term stable shock absorbing function can be provided.

Here, the tip of the shock absorbing rib 204 is undercut due to molding. However, by using a synthetic resin such as polypropylene which has a relatively high elastic deformability, it can be used to protrude (during release). The undercut part can be protruded from the mold without using any special method, and can be formed by ordinary molding work.

On the other hand, the cassette receiving rib 205 is formed integrally with the top plate 201 at a position near the shock absorbing rib 204. The cassette receiving rib 205 has a rectangular parallelepiped shape, is formed at a lower height than the shock absorbing rib 204, and is formed thicker than the shock absorbing rib 204 (FIG. 2). , Fig. 3, Fig. 1 1) o

As shown in Fig. 11, the height difference H0 between the shock absorbing rib 204 and the cassette receiving rib 205 is set to a value that does not reach the elastic limit of the shock absorbing rib 204. I have. That is, the cassette receiving rib 205 is configured to support the tape cassette in place of the shock absorbing rib 204 before the shock absorbing rib 204 reaches the elastic limit. This makes it possible to maintain the shock absorbing function of the shock absorbing lip 204 for a long time. The location of the shock absorbing rib 204 and the cassette receiving rib 205 can be arbitrarily set according to the type of tape cassette to be applied. In the present embodiment, a tape cassette in which the label attaching area is formed one level lower than the upper surface of the cassette seal is applied. Positions that can uniformly support the area that determines the maximum height of the upper surface of the tape cassette other than the attachment area include, for example, the impact absorbing ribs 204 and the cassette receiving lip 20 near the side wall 202 s. 5 are arranged.

The impact absorbing ribs 204 and the cassette receiving ribs 205 are alternately formed on substantially the same straight line along the side wall portion 202 s. Such a set of the shock absorbing rib 204 and the cassette receiving rib 205 is provided in the same configuration on the opposite side wall portion 202 s side (FIG. 2).

Next, the operation of the tape cassette storage case 1 of the present embodiment configured as described above will be described.

When the tape cassette is stored, the tape cassette is stored inside the face 10 of the cassette storage case 1 in the unfolded state. At this time, as shown in FIG. 9, a pair of cylindrical portions 105 standing upright on the bottom plate portion 101 are fitted into the hub holes Rh of the respective reels R, thereby forming the tape cassette. Positioning is performed.

In the present embodiment, by providing the upright positions of the cylindrical portions 105 in the bottom plate portion at positions that are asymmetrical in the front-rear direction, it is possible to prevent the tape cassette from being stored in the front-rear direction. I have.

After the tape cassette is stored in the box 1.0, the lid 20 is hinged 91, 9

Cover the box 10 via 2. As a result, the side wall opening 40 is in a locked state, and the integrated state of the box 10 and the lid 20 is maintained with a constant engaging force. Subsequently, the flap plate 51 is raised to lock the hook portion 52 with the locking portion 53, and the side lock mechanism is operated.

As described above, the tape cassette is stored in the cassette storage case 1. In this state, the reel R of the tape cassette C is supported by the upper convex portion 104 of the bottom plate portion 101 as shown in FIG.

The cylindrical portion 105 enters R h, and its tip is located on the inner peripheral surface of the reference hole R h 2. They are facing each other. Further, the shock absorbing rib 204 formed on the top plate 201 of the lid 20 elastically contacts the upper surface of the tape cassette C, and the cassette receiving rib 205 is fixed to the upper surface of the tape cassette C. They face each other through the gap H1 (<H0) (Fig. 12 (A)). 1312 (A) and (B) are shown upside down.

Next, the shock absorbing function of the cassette storage case 1 when, for example, a drop impact is applied to the cassette storage case 1 storing the tape cassette will be described.

The drop impact is absorbed or cushioned by the elastic deformation action of the shock absorbers 60, 70, 80 provided on the face body 10, the lid body 20, and the connecting part 30 of the cassette storage case 1. This protects the tape force set housed inside.

In addition, the bulging portion 107 formed on the side wall 102 f, 102 b, and 102 s of the box 10 supports the peripheral surface of the tape cassette, and the bulging portion 107 extends through the bulging portion 107. To absorb the shock by elastically deforming the side wall. At the same time, the impact force applied to the reel R is absorbed by the elastic deformation of the tip of the cylindrical portion 105 of the face body 11. On the other hand, the drop impact applied in the thickness direction of the tape cassette is absorbed by the deformation of the upper convex portion 104 and the lower convex portion 103 on the box 10 side, and the lid 2 On the 0 side, it is absorbed by deformation within the range of the height HI of the shock absorbing lip 204 (Fig. 12 (A)).

As described above, the tape cassette is protected from a drop impact. Therefore, according to the cassette storage case 1 of the present embodiment, the tape cassette can be effectively protected from the shock acting in the thickness direction and the direction perpendicular thereto, and the tape cassette can be damaged or damaged. It is possible to prevent the winding of the magnetic tape and the damage of the reel R, and the like.

Now, since the impact force in the thickness direction of the cassette is large, When the elastic deformation amount of 204 reaches the vicinity of the elastic limit, the cassette receiving rib 205 supports the upper surface of the cassette in place of the shock absorbing rib 204 as shown in FIG. 12 (B). Since the cassette receiving rib 205 is formed thicker than the impact absorbing rib 204, further deformation of the impact absorbing rib 204 is avoided. As a result, the deformation of the shock absorbing rib 204 beyond the elastic limit can be restricted, and the shock absorbing function of the shock absorbing rib 204 can be maintained for a long time.

Further, according to the present embodiment, since the cassette receiving ribs 205 are arranged in the vicinity of the shock absorbing ribs 204, the shock absorbing ribs 205 formed by the cassette receiving ribs 205 are provided. Therefore, the shock absorbing rib 204 can be reliably protected from deformation exceeding its elastic limit.

In addition, since a set of shock absorbing ribs 204 and cassette receiving ribs 205 alternately formed on substantially the same straight line is formed near the left and right side walls, respectively, the inclination of the tape cassette at the time of shock absorption is reduced. As a result, the drop impact can be absorbed almost evenly when viewed from the entire cassette.

Furthermore, since the entire cassette storage case 1 of the present embodiment can be integrally formed by one-shot injection molding, workability and productivity are not impaired. Furthermore, a fixed shock absorbing function can be ensured irrespective of the area of the lid 20, so that it is possible to sufficiently cope with downsizing of the case.

【Example】

A cassette storage case having the above-described configuration was actually manufactured, a tape force set was stored therein, and a drop impact test and a repeatability test of an impact absorbing rib were performed. The effect of the present invention was confirmed. The tape cassette used in the experiment was the “HD Cam Ichi SR” manufactured by Sony Corporation. The storage case is poly It is made of propylene and manufactured by injection molding of one shot in a single-piece mold.

The shock absorbing rib (the rib body of the present invention) and the cassette receiving rib (the auxiliary rib of the present invention) are provided on both sides of the lid of the storage case in the same manner as in the above embodiment, and three ribs are provided on each side. The shock absorbing ribs and two cassette receiving ribs on one side were alternately formed on a substantially straight line at a position approximately 6 mm away from the side wall of the lid.

The shock-absorbing rib had a width (length) of 10 mm, a thickness of 0.3 mm, and a height of 3.7 mm, and the radius of curvature of the curved portion at the tip was 1.8 mm. One of the cassette receiving ribs has a width (length) of 8 mm, a thickness of 1.5 mm, and a height of 2.4 mm.

As a test method of the drop impact test, drop the storage case containing the cassette from a height of 75 cm onto plastic tiles, and then visually inspect the appearance of the cassette and whether the internal structure (reel etc.) is damaged. And inspected for the number of samples found to be damaged. The cracks were not broken. In the repeatability test, with the cassette stored in the storage case, the operation of opening and closing the case lid (lid) was repeated 500 times, and the height of the shock absorbing rib was 80% or more of the initial height. If so, it was judged as acceptable. Table 1 shows the experimental results.

【table 1】

As is clear from Table 1, the conventional storage case for storing the same kind of tape cassette and the storage case not having the shock absorbing rib according to the present invention. By comparison, it can be seen that the damage status of the tape cassette after the drop test was reduced to 1/10 compared to the conventional case. This confirmed that the impact absorbing function of the impact absorbing rib of the present invention was very effective.

In addition, as a result of the repeatability test, it was found that the height of the impact absorbing rib was maintained at 80% or more of the initial height, thereby confirming the effect of the cassette receiving rib according to the present invention. did it.

The embodiment of the present invention has been described above. However, the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the example in which the shock absorbing rib 204 and the cassette receiving rib 205 are formed on substantially the same straight line and aligned in the longitudinal direction has been described. The ribs may be arranged adjacent to each other in a direction orthogonal or intersecting with the longitudinal direction. Further, instead of or in addition to the configuration in which the shock absorbing lip 204 and the cassette receiving rib 205 are provided near the side wall portion 202 s of the top plate portion 201, The rib may be provided at the center of the top plate.

In the above embodiment, the shock absorbing rib 204 and the cassette receiving lip 205 are provided on the top plate as separate ribs. However, for example, as shown in FIG. Shock absorbing ribs 2 14 that are in contact with the upper surface of the tape cassette with respect to the base 2 13 on the plate portion 201, and cassette receiving ribs 2 1 that restrict deformation of the ribs 2 14 beyond the elastic limit. 5 may be integrally formed by bringing them close to each other. With this configuration, the same effect as described above can be obtained, and the arrangement area of both lips can be reduced.

Furthermore, in the above-described embodiment, an example in which the shock absorbing rib 204 and the cassette receiving rib 205 according to the present invention are provided on the inner surface of the top plate 201 of the lid 20. However, the present invention is not limited to this. For example, the tape cassette may be provided on the inner surface of the side wall to elastically support the side surface of the tape cassette to be stored. In this case, by forming the curved portion at the tip of the shock absorbing rib in a direction curved toward the bottom plate side of the box, it is possible to prevent the tape cassette from being deteriorated in the housing. Industrial applicability

As described above, according to the cassette storage case of the present invention, the ribs formed on the inner surface of the case are brought into elastic contact with the outer surface of the tape cassette. The ribs can be efficiently absorbed by the elastic deformation of the ribs to protect the tape cassette, and since the ribs are integrally formed on the inner surface of the case, the molding work of one shot Thus, the case can be configured, thereby preventing a decrease in productivity.

In addition, if an auxiliary rib for regulating the amount of elastic deformation of the rib body is provided, the shock absorbing function of the rib body can be maintained for a long time.

Claims

The scope of the claims

1. In a synthetic resin cassette storage case having a storage space in which a tape cassette is stored, a rib in contact with an outer surface of the tape cassette stored in the storage space is provided on an inner surface of the case forming the storage space. A cassette storage case, wherein the body is formed physically.

2. The cassette storage case according to claim 1, wherein the rib body is a strip standing on an inner surface of the case.

3. The cassette storage case according to claim 1, wherein a tip end of the rib body has a curved shape.

4. The cassette storage case according to claim 1, wherein an auxiliary rib having a height lower than that of the rib body is formed on a surface on which the rib body is formed.

5. The cassette storage case according to claim 4, wherein the height difference between the rib body and the catching rib is set to a size such that the rib body does not reach an elastic limit.

6. The cassette storage case according to claim 4, wherein the auxiliary rib is formed thicker than the rib body.

7. The cassette storage case according to claim 4, wherein the rib body, the assisting rib, and the cap S are alternately formed on substantially the same straight line.

8. The cassette storage case according to claim 7, wherein a plurality of sets of the ribs and the auxiliary lips formed alternately on the substantially same straight line are formed on the same forming surface.

9. The cassette storage case according to claim 1, wherein a surface on which the rib body is formed is a surface facing the upper surface of the tape cassette.

10. A storage space in which the tape cassette is stored includes a box having a side wall, a lid having a side wall and covering the face, and a lid connected to the face and the lid via a hinge via a hinge. In a cassette storage case formed by a connecting portion serving as one side wall of a body, a lip body that is in contact with an upper surface of the tape cassette, and a catch rib that faces the upper surface of the tape cassette with a gap therebetween. And a cassette storage case, respectively, which are erected on the inner surface of the lid.

11. The cassette storage case according to claim 10, wherein the size of the gap is set so that the rib body does not reach an elastic limit.