JPH0518298Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention consists of a tray member on which a disk is placed, a bottom member that houses this tray member, and an opening/closing lid that is pivotally supported by this bottom member. The present invention relates to a disk storage case comprising a lid member.

(Prior Art) FIG. 4 is an external perspective view of a conventional disk storage case, and FIG. 5 is a sectional view taken along the - line in FIG. 4. The disk storage case is made up of three members: a tray member on which the disk is placed, a lower bottom member that stores the tray member, and an upper lid member that is pivotally connected to the bottom member and serves as an opening/closing lid. It is.

As shown in FIG. 4, reference numeral 1 designates a tray member on which a disk-shaped disk (not shown) such as a compact disk with a diameter of 12 cm is placed, on which signals are recorded as minute pits. Four shaft-shaped fitted parts 2 are formed on the side surface 1a, and cutouts 3 are formed in the vicinity 1 of the fitted parts 2 on the side surface 1a, and the fitted parts 2 are elastically displaceable. It's getting old.

Reference numeral 4 denotes a bottom member whose upper surface is open from a bottom surface 4a and a peripheral wall 4b surrounding the bottom surface, and stores the tray member 1, and 5 receives the fitted portion 2 formed on the peripheral wall 4b of the bottom member 4. A fitting portion 6, which is a round hole for fitting and fixing, is pivotally supported by one end of the bottom member 4, and is a lid member that closes the opening.

Note that 7 is a grip portion that protrudes from the center of the tray member 1, and is fitted into the center hole of a placed disk (not shown) to fix the disk.

In FIGS. 4 and 5, the disk storage case 10 described above is generally molded by plastic injection molding, and improves the mold releasability between the mold of the plastic injection molding machine and the product during molding. In order to do this, a punching taper is usually formed in the product (mold).

For example, as shown in FIG. 5, on the inner side of the peripheral wall 4b of the bottom member 4, a punched taper 8 is formed, which is an inclined surface whose upper end has a larger opening size than the lower end.

(Problems to be Solved by the Invention) As mentioned above, the release taper improves the releasability between the mold and the product, but as shown in FIG. In order to form the inclined surface 8 on the mold, it is necessary to increase the dimensional accuracy of the mold, which makes it difficult to control the molding dimensions and increases the manufacturing cost of the mold.

Therefore, if the dimensional accuracy of the draft taper is made rough, for example, as shown in FIG _.
Since an error occurs in the horizontal dimension T ₂ of the tray member 1, when trying to store the tray member 1 in the bottom member 4, the fit between the fitted portion 2 and the fitting portion 5 may be incorrect. As a result, there was a problem that the tray member 1 could not be stored in the bottom member 4, or even if it could be stored, the tray member 1 would immediately separate from the bottom member 4.

(Means for Solving the Problems) Therefore, the present invention was made to solve the above-mentioned problems.
A tray member having a mating portion on both sides, a bottom surface and a peripheral wall surrounding the bottom surface, and an upper surface opening to accommodate the tray member and fitting the mating portion to the peripheral wall. A disk storage case comprising a bottom member having a portion formed therein, and a lid member pivotally supported by the bottom member and closing the upper surface of the tray member, the lid member corresponding to the fitted portion of the tray member of the bottom member. The present invention provides a disk storage case characterized in that only the fitting portion has a substantially vertical standing wall and other portions are tapered.

(Example) Fig. 1 is a partially enlarged perspective view showing some of the main parts of the disk storage case of the present invention, Fig. 2 is an external perspective view of the disk storage case of the present invention, and Fig. 3 is the same as Fig. 2. - It is a sectional view on the line.

Note that the same parts as described above are given the same reference numerals, and the explanation thereof will be omitted.

As shown in FIGS. 1 to 3, 21 is a drawing taper formed inside the circumferential wall 4b of the bottom member 4, and this drawing taper 21 is an inclined surface whose upper end has a larger opening size than the lower end, It is formed only in the portions other than the vicinity of the fitting portion, which will be described later.

Reference numeral 22 denotes a fitting portion which is an upright piece with a width of about 4 mm and stands up substantially perpendicularly to the bottom surface 4a of the bottom member 4. An inclined surface 22a is formed at the upper end of the fitting portion 22, so that the fitting portion 2 of the tray member 1 can be easily fitted.

Moreover, as shown in FIG.
The dimension T ₃ between the fitting portions and the fitting portion 2 in No. 2 has the same dimensional relationship as the lateral dimension T ₂ of the tray member 1 .

The dimensional accuracy of the shape of the punched taper 21 of the present invention can be made rougher than that of the conventional punched taper by forming the special fitting portion 22, and the fitting portion 22, Only the dimensional accuracy between the fitting surfaces of 22 is made high.

Here, the assembly of the disk storage case 20 of the present invention will be explained.

First, the fitting portion 22 of the bottom member 4 and the fitting portion 2 of the tray member 1 are aligned, and the tray member 1 is housed while being pressed against the bottom member 4 from above.

At this time, the fitted portion 2 of the tray member 1 is once elastically displaced inwardly along the inclined surface 22a of the fitting portion 22 of the bottom member 1, and the fitted portion 2 and the fitted portion 22
When the fitting with the round hole 5 is completed, the fitted part 2 elastically returns to its original state.

Next, by fitting a pair of shaft parts 12 formed in the lid member 6 into a pair of holes 11 formed in one end of the bottom member 4, the lid member 6 can be freely opened and closed relative to the bottom member 4. support

This completes the assembly of the disk storage case 20.

In this way, the bottom member 4 that accommodates the tray member 1 has high dimensional accuracy only between the fitting surfaces 22b of the fitting parts 22, 22, and has a high dimensional accuracy other than the vicinity of the fitted part 2 of the tray member 1. Since the part is formed as a punched taper 21 with rough accuracy, it is possible to maintain good mold releasability from the mold of a plastic injection molding machine during molding, as in the past, and the dimensions of the shape of the punched taper 21 are There is no need to increase the accuracy as in the conventional case, and it is sufficient to increase the dimensional accuracy of only the fitting surface 22b of the mold, thereby reducing the manufacturing cost of the mold.

Furthermore, since the fitting part 22 is a standing piece that stands up substantially perpendicularly to the bottom surface 4a of the bottom member 4, the fitability between the fitting part 22 and the fitted part 2 is improved more than before. It increases.

(Effects of the invention) As described in detail above, the present invention enables the fitting of the bottom member and the tray member without impairing the releasability of the bottom member from the mold of a plastic injection molding machine, for example, during molding of the bottom member. It has the advantage of improving performance.

[Brief explanation of the drawing]

Fig. 1 is a partially enlarged perspective view showing a part of the main parts of the disk storage case of the present invention, Fig. 2 is an external perspective view of the disk storage case of the invention, and Fig. 3 is a cross section taken along the - line of Fig. 2. 4 is an external perspective view of a conventional disk storage case, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. DESCRIPTION OF SYMBOLS 1... Tray member, 2... Fitted part, 4... Bottom member, 4b... Peripheral wall, 5... Round hole, 6... Lid member, 20... Disk storage case, 22...
…Fitting portion.

Claims (1)

[Scope of utility model registration request] A tray member on which a disk is placed, and a tray member provided with mating parts on both sides, a bottom surface and a peripheral wall surrounding the bottom surface, the top surface of which is open, accommodates the tray member, and has a mating part on this peripheral wall. A disk storage case comprising a bottom member formed with a fitting portion for fitting and fixing the tray member, and a lid member pivotally supported by the bottom member and closing the upper surface of the tray member, the tray member of the bottom member 1. A disk storage case characterized in that only a fitting portion corresponding to a fitting portion of the disk storage case is formed as a substantially vertical standing wall, and other portions are formed with a cutout taper.