JP2826488B2 - Strap mounting column structure for small electronic devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a portable strap mounting column structure in a portable small electronic device. In recent years, portable terminal devices such as pagers, which have been in great demand, are generally provided with straps (straps) from the viewpoint of easy portability and fall prevention. Is provided with a strap mounting column for tying the strap.

[0002]

2. Description of the Related Art As a prior art, Japanese Patent Laid-Open Publication No.
No. 7 (the conventional technique) is cited,
This will be described with reference to FIGS. FIG. 7 is an exploded perspective view for explaining a conventional strap attaching portion structure, and FIG. 8 is an external perspective view of the same.

As shown in FIGS. 7 and 8, this prior art structure comprises an upper case 11 and a lower case 12,
A plurality of protrusions 13 having through holes 13 a are provided inside the lower case 12, and protrusions (not shown) facing the protrusions 13 of the lower case 12 are provided inside the upper case 11. Is provided. Lower case 12
A concave portion 12 a having a pin 14 is provided at a corner of the upper case 11, and a concave portion 11 a having a hole 15 into which the tip of the pin 14 is fitted is provided at a corresponding corner of the upper case 11. A transparent window 16 is provided on the upper case 11.

Reference numeral 17 denotes a notch 17a and a plurality of holes 17
b, and the printed circuit board 17
Various components including an LCD (liquid crystal display) 18 are mounted on the upper part, and an electronic device for achieving a pager function is configured. Notch 17 of printed circuit board 17
a is a concave portion 11a of the upper case 11 and a lower case 12
The holes 17b are formed at positions corresponding to the protrusions of the upper case 11 and the protrusions 13 of the lower case 12, respectively.

[0005] The printed circuit board 17 is accommodated in the upper case 11 and the lower case 12 so as to be sandwiched between the projections 13 of the upper case 11 and the lower case 12, and a plurality of screws 19 are provided.
Is inserted into the through hole 13a of the protrusion 13 of the lower case 12 from the outside, and is coupled to a screw hole formed in the protrusion of the upper case 11, whereby the upper case 11 and the lower case 12 are integrally fixed. .

The strap 10 is attached by being tied to a pin 14 as shown in FIG.

[0007]

The first problem with the above-mentioned column structure according to the prior art is that a considerable space is required to install the above-mentioned coupling screw portion, and therefore, it is necessary to design the column at the design stage. To be restricted. The reason is that the pins 14 provided on the lower case 12 are combined with the recesses 11 a provided on the upper case 11 and formed. Therefore, when the strap tied to the pin 14 is pulled and an external load is applied, a load is applied to the joint between the pin 14 provided in the lower case 12 and the concave portion 11a provided in the upper case 11, and And the strap 10 may come off. In order to prevent this, it is necessary to provide a coupling screw portion for fixing the upper case 11 and the lower case 12 in the vicinity of the coupling portion.

A second problem is that if the pins 14 are incorporated into the lower case 12 as metal pins in order to secure strength and prevent the strap from coming off as an application of the prior art, the cost of the product increases. The reason for this is that a component such as a metal pin is required, and it is necessary to incorporate the component into the lower case.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to prevent the column shape from being damaged and the strap not to come off when the strap is pulled, and to impair the design of the housing for the mounting portion of the strap. Reduced member costs and simplified assembly work by arranging the strap-shaped column for attaching the strap to the surface case that constitutes the small electronic device integrally with the surface case that constitutes the small electronic device. It is an object of the present invention to provide a strap mounting column structure for a small electronic device, which can reduce costs and improve recyclability.

[0010]

In order to achieve the above-mentioned object, according to the present invention, there is provided a strap mounting column structure for a small electronic device, comprising: a front case constituting a housing; And a column for strap binding is integrally formed with the upper case in a concave space formed at a corner of the upper case, and the cross-sectional shape of the column projects inward with respect to the surface of the upper case. It is characterized by having an acute angle portion.

According to the structure of the present invention, a strap binding column is integrally formed with the upper case in a concave space formed in the upper case, and the pillar has a sectional shape projecting inward with respect to the surface of the upper case. By providing an acute angle portion, the slide piece of the concave portion of the case forming die is
By dividing into two, the upper case and the pillar can be easily formed integrally.

[0012]

Next, the present invention will be described with reference to the drawings.

[1] Description of Configuration FIG. 1 is a perspective view showing the appearance of an embodiment of the present invention, and FIG. 2 is a side view taken along the arrow B in FIG. As shown in FIG.
In a small electronic device having a main body composed of an upper case 1 and a lower case 2 formed of a plastic material, a strap 10 is wound around a space of a concave portion 1a inside a case surface at a corner portion of the upper case 1. A pillar 3 is provided, and the pillar 3 is formed integrally with the upper case 1.

As shown in FIG. 2B, a strap 10 is attached to a pillar 3 which is a strap attaching portion of a small electronic device.

FIG. 3 is a sectional view taken along the line AA of FIG. Usually, a column for attaching a strap provided at a corner of a small electronic device is formed of a metal pin having a circular cross section. However, in this embodiment, since the column 3 is integrally formed with the upper case 1, The cross-sectional shape of 3 is mostly circular and a portion has an acute angle portion 3a such that it projects inward with respect to the surface of the upper case 1.

[2] Explanation at the time of pillar molding FIG. 4 shows a slide 4 of a molding die on the sectional view of FIG.
It is sectional drawing which shows a mode of division | segmentation.

If the pillar 3 does not have the acute angle portion 3a, the slide pieces 4a and 4b of the molding die 4 are caught on the pillar 3 during sliding, and usually cannot be molded. However, as shown in this figure, by providing the pillar 3 with an acute angle portion 3a protruding inward, the slide piece (A) 4a and the slide piece (B) 4b divided at the center of the pillar 3 are shown in the figure. Since the sliding can be smoothly performed in the directions of the arrows, the structure of the molding die 4 for molding the column 3 integrally formed with the upper case 1 is simplified, and the molding can be easily performed.

[3] Another Embodiment FIG. 5 is a perspective view of another embodiment of the present invention, and FIG. 6 is a cross-sectional view showing a pillar shape thereof. The difference from the above-described embodiment is the position and shape of the pillar 5. As shown in FIGS. 5 and 6, even if the column portion of the column 5 has a fan-shaped cross section in contact with the outer surface of the upper case 1,
The upper case 1 and the column 5 can be integrally formed by having the acute angle portion 5a protruding inward with respect to the surface of the mold, so that the structure of the molding die is simplified and molding is possible.

[0019]

Since the present invention is constructed as described above, the following effects can be obtained.

The first effect is that the strap does not come off when the strap attached to the pillar is pulled, and that the strength of the pillar can be ensured. The reason is that both ends of the pillar are integrally formed with the upper case.

The second effect is that a good design can be kept. The reason is that a column for strap binding can be provided in the internal space of the surface case.

The third effect is that the cost can be reduced. The reason for this is that metal pins are unnecessary and the number of assembling steps of metal pins can be eliminated.

A fourth effect is that recycling and sorting and disposal of the upper case are facilitated. The reason is that the pillars can be formed as a single piece with the upper case.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a strap mounting column structure of a small electronic device according to an embodiment of the present invention.

FIG. 2 is a side view as viewed in the direction of arrow B in FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view showing a molding die applied to FIG. 3;

FIG. 5 is a perspective view showing an appearance of a strap mounting column structure of a small electronic device according to another embodiment of the present invention.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is an exploded perspective view showing an example of the related art.

FIG. 8 is a perspective view showing the appearance of an example of a conventional technique.

[Explanation of symbols]

 1, 11 Upper case 1a, 11a Concave part 2, 12 Lower case 3, 5 pillar 3a, 5a Sharp corner part 4 Molding die 4a Slide piece (A) 4b Slide piece (B) 10 Strap 13 Projection part 14 Pin 15 Hole 16 Transparent Window 17 Printed circuit board 18 LCD (liquid crystal display) 19 Screw

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H05K 5/02 H04Q 7/32

Claims (2)

(57) [Claims] 1. A front case constituting a housing of a small electronic device, wherein the front case is divided into an upper case and a lower case, and a strap binding column is formed in a concave space formed at a corner of the upper case. Is formed integrally with the upper case. 2. The strap mounting column structure for a small electronic device according to claim 1, wherein the cross-sectional shape of the column has an acute angle portion protruding inward with respect to the surface of the upper case.