JPH0132386Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a binding for a portable electronic device such as an electronic calculator or an electronic game machine.

It is well known that this type of conventional binding is of the type that holds a portable electronic calculator 1 as shown in FIG. That is, the binding body 2 includes a front cover plate 3 and a back cover plate 4 integrally folded in two, with the folded portion serving as the hinge portion 5. A main band part 6 extending in the width direction and a pair of corner band parts 7, 7 located at the corners are fixed to the inner surface of the back cover plate 4. Incidentally, a pocket 8 is provided on the inner surface of the front cover plate 3. Thus, the electric calculator 1 is inserted and held between the main band portion 6 and the back cover plate 4, and the lower end corner of the calculator 1 is inserted between the corner band portions 7, 7 and the back cover plate 4. hold in between. Therefore, the calculator 1 is held by the back cover plate 4 and the front cover plate 3
can be opened and closed via the hinge part 5 so as to cover the surface of the calculator 1. Incidentally, each of the calculators 1 has a case composed of a bottom plate 9 and a top plate 10 made of synthetic resin.

However, in the conventional example, the main band part 6 and the pair of corner band parts 7, 7 are both made of synthetic resin sheets, and both ends of each band are welded to the back cover plate 4. The cost is high in terms of numbers and materials. In addition, each band hardens and loses its flexibility in the winter, and furthermore, it becomes fatigued due to aging, and therefore, if the binding is accidentally dropped while holding the calculator, each of the bands is easily cut. , there is a problem that the calculator cannot be held in the binding after that.

In view of the above, the purpose of the present invention is to provide a binding body that is low-cost and can securely hold electronic devices. In the device, the binding body covers the surface of the electronic device in an openable and closable manner: A hinge part extending to one side edge of the front cover plate, and a welding part made of synthetic resin extending further from the hinge part; the bottom plate of the electronic device is welded with an extremely thin wall thickness. the welded portion of the binding body is fixed to the outer surface of the bottom plate of the electronic device, and the welded portion and the welded portion are welded to each other.

Embodiments of the present invention will be described below in detail based on the drawings. In the first embodiment shown in FIGS. 2 and 3, the bottom plate 9 constituting the case of the portable electronic device is
It is molded from a synthetic resin such as ABS resin, and a frame-shaped rib 11 is formed on the outer periphery of the outer surface (rear surface) so that only one side in the width direction is open so that it is approximately U-shaped. Furthermore, welded parts 12 with extremely thin walls are formed at appropriate locations on the bottom plate 9 (four locations near the corners in the illustrated example). This thin welded part is formed by recessing the bottom plate 9 from the inner surface, and preferably has a thickness of approximately 0.7 mm. A fitting rib 13 is formed on the inner circumferential edge of the bottom plate 9, and a case of the electronic device is formed by fitting the top plate to the rib. On the other hand, the binding body 2 is made by overlapping front and back sheets 13 and 14 made of vinyl chloride sheets and welding them together at the periphery. It can be folded freely. Front cover plate 3 excluding the hinge portion 5
In each of the front and back cover plates 4, a core material 16 such as paper is interposed between the front and back sheets, so that the front and back cover plates have a thick wall and are maintained in a plate shape. A vinyl chloride sheet is welded to a part of the inner surface of the front cover plate 3 to form a pocket portion 8. The back cover plate 4 has a smaller width in the longitudinal direction than the front cover plate 3, and fits into the space surrounded by the frame-shaped ribs 11 of the bottom plate 9. On the other hand, the front cover plate 3 is larger in size than the back cover plate 4, and is configured to sufficiently cover the surface of the electronic device.

The back cover plate 4 of the binding body 2 is fixed to the outer surface of the bottom plate 9 so as to match the inner peripheral edge of the frame-shaped rib 11, and the back sheet 14 and the welded portion 12 are mutually connected. Welded. Therefore, in this embodiment, the portion of the back sheet 14 of the back cover plate 4 that corresponds to the welded portion 12 forms the welded portion 17 .
For this welding, high-frequency welding or ultrasonic welding is used. For example, the electrode 18 used for high-frequency welding has a pole part corresponding to the recessed part forming the welded part 12 from the inner surface of the bottom plate 9. 19
The top of the pole portion 19 is provided with an unevenness 20 such as a knurling. Electrodes are also arranged on the back cover body 4 corresponding to this electrode, but preferably one of the electrodes 18 is heated in advance (about 100°C) to heat the welded part 12 and easily melt it. After this state, the welded portion 12 and the welded portion 17 are welded together by high frequency.

4 and 5 show a second embodiment of the present invention, in which an ABS bottom plate 9 constituting a case of an electronic device has a stepped portion 21 with a notched outer surface at one side edge along the longitudinal direction. The stepped portion 21 has a welded portion 12 whose wall thickness is made extremely thin from the inner side. On the other hand, the binding body 2 is formed by welding front and back sheets 13 and 14 made of vinyl chloride sheets at their peripheral edges, and has a front cover plate 3 that covers the front surface of the electronic device, but does not have the above-mentioned back cover plate. That is, the front cover plate 3 has a core material 16 such as paper interposed between the front and back sheets, has a hinge portion 5 without the core material on one side edge of the front cover plate 3, and furthermore has a hinge portion 5 that does not have the core material. An extended welded portion 17 is provided. This welded part 17
fits the step portion 21 of the bottom plate 9.

Then, the welded part 17 of the binding body 2 is connected to the stepped part 2 of the bottom plate 9.
1, the welding part 17 and the welded part 12 are welded to each other. The other configurations are the same as those of the first embodiment.

As a result of the above configuration, the present invention has a configuration in which the welded part of the binding body is directly welded to the welded part of the bottom plate, so the conventional band member is not required and the cost is low from both the material and process standpoints. At the same time, the binding and the electronic device are reliably fixed to each other. In particular, in the present invention, when welding the welding part and the welded part to each other, it was thought that it was impossible to weld to the sheet material with the conventionally thick bottom plate, but in advance, the thickness of the welded part was made to be extremely thick as the welded part. Since it is thin, it has the remarkable effect of making this possible for the first time.

Furthermore, as in the above embodiment, if the parts to be welded are heated and melted by an electrode and then the parts to be welded are welded to each other by high frequency or ultrasonic waves, the welding is perfect and there is a risk that mutual peeling may occur. In addition, if the welded part and the welded part are welded and connected in a wave-shaped cross section by the unevenness of the electrode, the welding strength can be further improved. In addition, if the frame-like rib of the first embodiment or the stepped portion of the second embodiment protects the portion located on the back side of the bottom plate of the binding at the periphery, the sheet material of the binding can be protected at the periphery. It does not turn over on the bottom plate and maintains its beautiful appearance at all times.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional binding body, Fig. 2 is an exploded perspective view showing the first embodiment of the present invention, Fig. 3 is an enlarged sectional view of the same main part, and Fig. 4 is a perspective view showing the second embodiment. FIG. 5 is an enlarged cross-sectional view of the same essential parts. 1... Portable electronic device, 2... Binding body, 3... Front cover plate, 4... Back cover plate, 5... Hinge part,
9... Bottom plate, 12... Welded part, 13... Top sheet, 14... Back sheet, 17... Welded part.

Claims (1)

[Claims for Utility Model Registration] A mobile electronic device comprising a synthetic resin bottom plate and a binding body that covers the surface of the electronic device in an openable and closable manner: A front cover plate made of synthetic resin that covers the surface so as to be openable and closable, a hinge part extending to one side edge of the front cover plate, and a welded part made of synthetic resin extending further from the hinge part. Preparation; The bottom plate of the electronic device includes a welded portion with an extremely thin wall; The welded portion and the welded portion are mutually connected while the welded portion of the binding body is fixed to the outer surface of the bottom plate of the electronic device. A binding body for a portable electronic device characterized by being formed by welding.