JPS6073775A - Small-type electronic computer with notebook type case - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to a small electronic calculator with a notebook type case.

[Background of the invention]

In recent years, small electronic calculators with bifoldable notebook-shaped cases have been made by enclosing device cases with flexible synthetic leather, such as soft vinyl chloride sheets, to protect the devices and give them a luxurious feel. is being developed.

In such a small electronic calculator, an equipment case that houses predetermined electronic components and circuit boards, etc., and an aluminum plate for display and decoration placed on the equipment case are made of two upper and lower soft chloride plates. A method of sandwiching vinyl chloride sheets and bonding these two upper and lower vinyl chloride sheets using a high-frequency welder is being considered. In other words, since the soft vinyl chloride sheet and the equipment case contain plasticizers, conventional adhesives such as acrylic resin or nitrile-butadiene rubber (NBR resin) have been used as adhesives. A method of thermocompression bonding using an adhesive with plasticizer properties has been considered, but this method requires high temperature and pressure during thermocompression bonding, so the surface of the soft vinyl chloride sheet is It becomes shiny and the product value decreases. In addition, with this bonding method, there is a problem that the vinyl chloride sheet may peel off from the aluminum plate during the high-frequency welding process that fuses the upper and lower vinyl chloride sheets.For this reason, it is difficult to bond the soft vinyl chloride sheet and the equipment case. Adhesion has problems such as the selection of adhesive and bonding conditions, which are extremely difficult, and the adhesive strength is weak.Furthermore, the bending part of the soft vinyl chloride sheet that is bent in two has poor durability. There is also.

[Purpose of the invention]

This invention was made against the background of the above-mentioned circumstances, and is capable of easily and firmly adhering a soft synthetic resin sheet such as a vinyl chloride sheet to an equipment case without using a special adhesive. An object of the present invention is to provide a small electronic calculator with a notebook-type case that has excellent durability at the bent portion of a soft synthetic resin sheet.

[Key points of the invention]

In order to achieve the above-mentioned object, this invention provides a flange on the peripheral edge of an equipment case and a lower step inside the flange, and provides a hard synthetic resin sheet at least on the bent side. Synthetic resin sheets are bonded together, and at least a portion of the hard synthetic resin sheet is inserted into the stepped portion of the equipment case and is adhered to the flange or stepped portion of the equipment case.

[First Embodiment] Hereinafter, with reference to FIGS. 1 to 4, the first embodiment of the present invention will be described.
An example will be explained.

FIG. 1 is an external perspective view of a small electronic calculator with a notebook type case. This small electronic calculator 1 has a notebook-type case 2 that can be folded into two, has a key switch section 3 on the right side, and a display section 4 and a solar cell section 5 on the left side.

2 to 4 show the arm of the small electronic calculator 1, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a sectional view of the assembled state, and FIG. 4 is the main part of FIG. 3. FIG. In these figures, the notebook type case 2 is made up of two soft vinyl chloride sheets 6 and 7, and the upper vinyl chloride sheet 6 - has a switch opening 6 & on the right side.
Further, a display opening 6b is formed on the left side. A keyboard switch 8 and a stainless steel reinforcing plate 9 are arranged on the right side between the two vinyl chloride sheets 6.7, and a hard vinyl chloride sheet 101 is arranged on the left side from above. Decorative panel 11,
and an inner case (equipment case) 12 are arranged. In this case, a liquid crystal display device 13, a solar cell 14, and a circuit board 15 are housed in the inner case 12, and the liquid crystal display device 13 and the solar cell 14 are heated in the circuit board 15. In addition to being electrically connected via seals (flexible connectors) 13a and 14a, the keyboard switch 8 described above is also electrically connected via a heat seal (flexible connector) 16 (see Figure 2). ).

As shown in FIG. 3, the keyboard switch 8 disposed on the right side between the vinyl chloride sheets 6 and 7 is disposed on the lower surface of the upper soft vinyl chloride sheet 6 in correspondence with the display opening 6a, and , its structure consists of a keyboard sheet 8&, a movable contact sheet 8b, a spacer 8C1, and a fixed contact sheet 8d laminated in order from the top.

On the other hand, the hard vinyl chloride sheet 10 placed on the left side between the upper and lower two vinyl chloride sheets 6 and 7 has approximately the same size as the left side of the upper soft vinyl chloride sheet 6, as shown in FIG. , an opening 10a of the same size as the display opening 6b is formed in the center, and as shown in FIGS. 3 and 4, the upper soft vinyl chloride sheet 6
It is bonded to the bottom surface of the board by a high-frequency well.

Further, the decorative panel 11 is made of an aluminum plate, and the second
As shown in the figure, a display window 11a and a solar cell window 11b are formed at predetermined locations on the upper surface, and are attached to the upper part of the inner case 12 via an adhesive 17 as shown in FIGS. 3 and 4. It is being

Further, the inner case 12 is made of synthetic resin, and the second
As shown in the figure, each storage section 12a, 12b, 12c stores a liquid crystal display device 13 corresponding to the display window 11a of the decorative panel 11, a solar cell 14 corresponding to the solar cell window 11b, and a circuit board 15, respectively. At the same time, a frame portion 12d to which the decorative panel 11 is attached is formed around the upper portion of the frame portion 12d. This frame portion 12 (1 projects upwardly through each opening 10a, 6b of the hard vinyl chloride sheet 10 and the upper soft vinyl chloride sheet 6, and is formed to have the same size as each opening 10a, 5b. In addition, a groove (step) 18 is formed in the peripheral flange of the inner case 12.
As shown in the figure, the frame 12d of the inner case 12 is viewed from below through the openings 10a and 6 of each vinyl chloride sheet 10.6.
When it is made to project upward through a, the hard vinyl chloride sheet 10 is recessed and the hard vinyl chloride sheet 10 is locked inside. In this case, the hard vinyl chloride sheet 10 is adhered in the groove 18 with an adhesive 19, and the soft vinyl chloride sheet 6 is attached to the edge of the decorative panel 11 attached to the frame 12d of the inner case 12. It is held down through the The adhesive 19 used here is for adhesion between the hard vinyl chloride sheet 10 and the inner case 12, so an acrylic adhesive may be used. Chive)-4500) etc. can be used. Note that the lower peripheral edge of the inner case 12 has an inclined surface so as to provide a smooth feel.

Next, the case of assembling the small-sized m-child type calculator 1 as described above will be briefly explained.

In this case, as shown in FIG.
The liquid crystal display device 13 and the solar cell 14 are connected to each other by heat seals 13a and 14a, respectively, and the keyboard switch 8 is also electrically connected by a heat seal 16. Then, the liquid crystal display device 13, the solar cell 14, and the circuit board 15 are housed in the inner case 12.

Thereafter, a hard vinyl chloride sheet 10 is bonded to the lower surface of the upper soft vinyl chloride sheet 6 using a high frequency well so as to correspond to the display opening 6b.

Then, the upper soft vinyl chloride sheet 6 is placed on the upper surfaces of the inner case 12 and the keyboard switch 8 from above, and the frame 112 of the inner case 12 is
d to the opening 6b, loa of each vinyl chloride sheet 6.10
through the concave groove 1 of the inner case 12 to protrude upward.
A hard vinyl chloride sheet 10 is inserted into the inside of the container 8 (see FIGS. 3 and 4). At this time, an adhesive 19 is provided between the hard vinyl chloride sheet 6 and the groove 18 of the inner case 12, and pressure is applied from the top surface of the soft vinyl chloride sheet 6 to the groove of the inner case 12 to make the hard vinyl chloride sheet 6
and the inner case 12 are firmly adhered. After that, from above the upper soft vinyl chloride sheet 6, the decorative panel 1
1 to the frame 12 (l) of the inner case 12 via adhesive 17, and at the same time attach the hard vinyl chloride sheet 1 to the end of the decorative panel 11 via the soft vinyl chloride sheet 6.
0 (see Figure 4).

After that, a reinforcing plate 9 is placed under the keyboard switch 8, and a lower soft vinyl chloride sheet 7 is placed on each lower surface of this reinforcing plate 9 and the inner case 12, and this lower soft vinyl chloride sheet 7 and The upper soft vinyl chloride sheet 6 is connected to the upper soft vinyl chloride sheet 6 by high frequency wells, and the peripheral and middle parts are
Welding is performed as shown in the figure and FIG. Then, as shown in FIG. 1, a notebook-type small-sized electronic calculator 1 with a nurse is obtained which can be bent into two parts with the middle part serving as a folding part 2a.

According to the small electronic calculator 1 with a notebook-type case obtained in this manner, of the two upper and lower soft vinyl chloride sheets (6.7) surrounding the inner case 12, the lower surface of the upper soft vinyl chloride sheet 6 is made of plastic. A hard vinyl chloride sheet 10 with a low content of agent is bonded, and this hard vinyl chloride sheet 10 is inserted into the groove 18 of the inner case 12 and locked, and is bonded with an adhesive 19. , it is possible to use commercially available acrylic room-temperature curing adhesives without being subject to the extremely strict selection of adhesives or restrictions on bonding conditions as in the past. and the inner case 12 can be easily and well bonded to each other via the above-mentioned hard vinyl chloride sheet 10, and the bonding strength thereof can also be increased. Moreover, since the soft vinyl chloride sheet 6 can be bonded to the inner case 12 as described above, the durability of the bent portion 2a at the joint between the two upper and lower soft vinyl chloride sheets 6.7 can also be increased. can.

In addition, in the above-mentioned small electronic calculator 1, the upper soft vinyl chloride sheet 6, which has the hard vinyl chloride sheet 10 bonded to the lower surface by being inserted into the groove 18 of the inner case 12, is attached to the inner case 12. Since the end of the decorative panel 11 attached to the upper part of the case 12 is pressed together with the hard vinyl chloride sheet 10, this also makes the soft vinyl chloride sheet 6 firmly fixed.

[Second Embodiment] Next, referring to FIGS. 5 to 7, the second embodiment of the present invention will be described.
An example will be explained. In this case, the same parts as those in the first embodiment described above are given the same reference numerals, and the explanation thereof will be omitted.

FIG. 5 is an enlarged cross-sectional view showing the bonded state of the inner case 12 and the soft vinyl chloride sheet 6.7 in the vicinity of the bent portion 2a of the notebook-type case 2. The inner case 12 shown in this figure has almost the same structure as the first embodiment described above, but has a groove (step) 2 formed in the peripheral flange 20.
1 is provided only at a location close to the frame portion 12d. On the other hand, the upper soft vinyl chloride sheet 6 covering the inner teeth 12 has a hard vinyl chloride sheet 22 joined to its lower surface as described later, and this hard vinyl chloride sheet 6 is similar to the first embodiment described above. The upper soft vinyl chloride sheet 6 and the hard vinyl chloride sheet 22 are bonded onto the peripheral flange 20 of the inner case 12 with a similar adhesive 19 and extend into the groove 21 of the inner case 12.
That is, the end of the decorative panel 11 attached to the frame 12d of the inner case 12 via the adhesive 17 is pushed into the groove 21 and is locked in the groove 21. In this case, the tip of the soft vinyl chloride sheet 6 pushed into the groove 21, that is, the edge of the display opening 6b of the soft vinyl chloride sheet 6, is formed with a semicircular protrusion 23 that projects upward. In addition, the hard vinyl chloride sheet 22 is attached to the upper and lower portions of the folded portion 2a of the notebook type case 2.
It also extends between the two soft vinyl chloride sheets 6 and 7 and is also arranged between them.

6 and 7 show the process of joining a hard vinyl chloride sheet 22 to a soft vinyl chloride sheet 6. FIG.

First, as shown in FIG. 6, a hard vinyl chloride sheet 22 is placed on the bottom surface of the soft vinyl chloride sheet 6.
At the same time as welding these together with high frequency wells,
Opening 5 in each PVC sheet 6.22 with cutter 24
b, cut the portion corresponding to 22a. In this case, the cutter 24 has four semicircular parts 24a formed at its base. For this reason, each vinyl chloride sheet 6.22
They are joined as shown in the figure. That is, the thickness of the soft vinyl chloride sheet 6 at the portion heated and pressurized by the high-frequency wells is thinner than other portions, and the thickness of the soft vinyl chloride sheet 6 is thinner than other portions.
4a, that is, a portion corresponding to the edge of the opening 6b, the soft vinyl chloride sheet 6 protrudes upward in a semicircular shape,
It forms a protrusion 23.

However, even in the above-mentioned small electronic calculator with a notebook type case, in addition to the same effects as in the first embodiment described above, in particular, the soft vinyl chloride sheet 6 to which the hard vinyl chloride sheet 22 is bonded is used. A semicircular protrusion 23 is provided at the end, that is, the edge of the display opening 6b, and this protrusion 23 is attached to the frame 12d of the inner case 12. Since it is pushed into the concave groove 21 of the case 12 and is recessed and locked, the upper soft vinyl chloride sheet 6 can be pressed even better. A third embodiment of the present invention will be described with reference to FIGS. 8(A), (B), and (C). In this third embodiment, high frequency wells are formed all at once in the final step, and the same parts as in the second embodiment described above are designated by the same reference numerals, and their explanation will be omitted.

FIG. 8(A) is an enlarged sectional view showing the bonded state of the inner case 12 and the soft vinyl chloride sheet 6.7 surrounding it. The inner case 12 shown in this figure is constructed similarly to the second embodiment described above. An aluminum foil 31 is attached to the peripheral flange 20 of the inner case 12 via an adhesive 30, and a hard vinyl chloride sheet 22 is attached to the aluminum foil 31 via an adhesive 32. installed. moreover,
An upper soft vinyl chloride sheet 6 is bonded onto the hard vinyl chloride sheet 22 by high frequency wells, as will be described later. In this case, the hard vinyl chloride sheet 22
and the soft vinyl chloride sheet 6 extend into a groove 21 formed in the peripheral flange 20 of the inner case 12. Then, the lower soft vinyl chloride sheet 7 is placed under the inner case 12, and after this soft vinyl chloride sheet 7 and the upper soft vinyl chloride sheet 6 are bonded using high-frequency wells, the frame 12a of the inner case 12 is The decorative panel 11 is attached via adhesive 17 to the upper soft vinyl chloride sheet 6 and the hard vinyl chloride sheet 22 by the ends of the decorative panel 11 in the groove 21 of the inner case 12.
It is pushed inside and locked.

FIG. 8(B) shows the aluminum foil 31 mentioned above.

This aluminum foil 31 is a hard vinyl chloride sheet 2
2, and its central opening is larger than the openings 22a-, 6b of the hard vinyl chloride sheet 22 and the upper soft vinyl chloride sheet 6 by the width of the groove 21 of the inner case 12. 31a is formed, and an electrode portion 31'b is formed protrudingly on the minus side (right side in the figure). This electrode portion 31b is bent along the side and lower slopes of the inner case 12,
It extends to the lower surface of the inner case 12.

Figure 8 (0) shows the aluminum foil 3 on the inner case 12.
1 shows a state in which the upper soft vinyl chloride sheet 6 is joined to the hard vinyl chloride sheet 22 attached via the high-frequency wells. In this case, an aluminum foil 31 is attached in advance to the peripheral flange 20 of the inner case 12 via an adhesive 30, and a hard vinyl chloride sheet 2 is attached onto the aluminum foil 31 via an adhesive 32.
Attach 2. After that, the electrode part 31b of the aluminum foil 31 is bent along the side and inclined surface of the inner case 12, and the tip of the electrode part 31b is attached to the inner case 12.
At the same time, the upper soft vinyl chloride sheet 6 is placed on the hard vinyl chloride sheet 22. and,
The inner case 12 is connected to the negative electrode side 33 of the high frequency well.
The electrode portion 31b of the aluminum foil 31 is brought into contact with the negative electrode 33. In this state, when the upper soft vinyl chloride sheet 6 is heated and pressed on the positive electrode side 34 of the high frequency well, the soft vinyl chloride sheet 6 is welded to the hard vinyl chloride sheet 22. At this time, the negative electrode side 33 of the high frequency well approaches the positive electrode side 34 via the aluminum foil 31, so that the soft vinyl chloride sheet 6 and the hard vinyl chloride sheet 22 can be easily joined by the high frequency well.

After this, the lower soft vinyl chloride sheet 7 is placed under the inner case 12, and the soft vinyl chloride sheet 7 and the upper soft vinyl chloride sheet 6 are successively welded using a high frequency well. Then, the decorative panel 11 is glued to the frame 12d of the inner case 12, and this decorative panel 11
By pushing the upper soft vinyl chloride sheet 6 and hard vinyl chloride sheet 22 into the grooves 21 of the inner case 12 at the ends, a small electronic calculator with a notebook type case similar to the second embodiment described above can be obtained. .

However, in the case of a small electronic calculator such as the one mentioned above,
Since the high-frequency wells can be performed all at once in the final process, the
Easy to manufacture.

In addition, in each of the above-mentioned embodiments, the notebook type case 2 is
Although two upper and lower soft vinyl chloride sheets 6.7 were used, this invention is not limited to the vinyl chloride sheets 6.7.
Other soft synthetic resin sheets may be used, and similarly, it is not necessary to use hard vinyl chloride sheets.
Other hard synthetic resin sheets may also be used.

In addition, although the display section and the keyboard section are separated by a folding section in the above description, the present invention is not limited to this. - It can also be applied to small electronic calculators with a notebook-type case that covers the surface of the calculator, or a notebook-type case that is folded in three or more by extending the notebook case section and providing a storage section for memo paper or a commuter pass.

〔Effect of the invention〕

As explained above, according to the small electronic calculator with a notebook type case according to the present invention, a flange is provided on the peripheral edge of the device case, and a lower step is provided inside the flange, and a soft synthetic resin sheet is provided. A hard synthetic resin sheet is bonded to at least the bent portion side, and at least a portion of the hard synthetic resin sheet is immersed and locked in the stepped portion of the equipment case, and is adhered to the flange or stepped portion of the equipment case. Therefore, the soft synthetic resin sheet and the equipment case can be easily and well bonded together, and the adhesive strength can be increased. Furthermore, the durability of the bent portion of the soft synthetic resin sheet can be improved. can be achieved.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is an external perspective view of a small electronic calculator with a notebook-type case, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is an exploded perspective view of FIG. is ■− in Figure 1.
■ Line sectional view, Figure 4 is an enlarged sectional view near the folded part of the notebook type case, Figures 5 to 7 show the second embodiment of this invention, and Figure 5 @ shows the folded part of the notebook type case. 6 is a sectional view showing a state in which a soft vinyl chloride sheet and a hard vinyl chloride sheet are joined by a high-frequency welder, FIG. 7 is a sectional view showing the joining state, and FIG. 8 (A ), (B), and (0) show the third embodiment of the present invention, FIG. 8(A) is an enlarged sectional view of the vicinity of the folded part of the notebook type case, and FIG. 8(B) is an aluminum External perspective view of foil, No. 8
Figure (0) is a sectional view showing a state in which a soft vinyl chloride sheet is joined to a hard vinyl chloride sheet using a high-frequency welder. 1...Small electronic calculator with notebook type case, 2
...Notebook type case, 2a...Folded part,
6.7... Soft vinyl chloride sheet, 10.22
......Hard vinyl chloride sheet, 12...
Inner case ([7 cases), 18.21...
・Concave groove (stepped part). Patent applicant Kashi No. 1 [Sanki Co., Ltd. 艷・1 Agent Patent attorney Yama 1) End, ;) 11, -7, Figure 6 = 402- Figure 7

Claims (1)

[Claims] A small electronic calculator with a notebook-type case in which a bendable soft synthetic resin sheet is integrally formed with the device case and the display section and keyboard section provided on the device case are closed inside. A flange with a flat upper surface is provided on the circumferential edge of the flange, and a lower step is provided inside the flange, and a hard synthetic resin sheet is bonded to at least the bent side of the soft synthetic resin sheet. A small electronic calculator with a notebook-type case, characterized in that at least a portion of the calculator is immersed in the stepped portion of the device case and is adhered to the flange or step of the device case.