JPH065525B2 - Electronic device manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing an electronic device, and more particularly to a method for manufacturing an electronic device that simultaneously manufactures a plurality of thin electronic devices such as a thin electronic desk calculator.

FIG. 1 is an external perspective view of a thin electronic calculator (hereinafter referred to as a card calculator) showing an example of a thin electronic device to which the method of the present invention is applied, and FIG. 2 is a sectional view taken along line AA of FIG. There is. In these drawings, 1 is a display unit 2 and a battery unit 3.
The surface sheet material is made of a transparent sheet having a thickness of about 0.1 mm and a name 4 such as a key symbol printed on the back surface except for the flexible substrate such as a polyester film or a polycarbonate film. It uses a plastic film. Reference numeral 5 denotes a frame member formed by molding plastic resin or the like, and has a thickness or about 2 mm in the embodiment. 6 is a metal reinforcing plate that covers the back side of the card calculator and also serves as a reinforcement because the calculator is thin, and has names such as hairline and rated model name printed on the bottom surface. Reinforcement plate 6
As a material for the, a stainless plate with a thickness of about 0.3 mm is used. In the frame member 5 held between the surface sheet material 1 and the reinforcing plate 6, a key rubber 7 also serving as a movable contact made by molding silicon rubber or the like and a printed circuit board 8 are built in. The electronic components such as the LSI 9 and the display 10 are conductively fixed by means such as soldering or heat sealing, and the entire printed circuit board constitutes a printed circuit board unit. The printed circuit board 8 is adhered to the reinforcing plate 6 by an adhesive layer 11 formed on the reinforcing plate 6, and the key rubber 7 is sandwiched between the surface sheet material 1, the frame member 5 and the printed circuit board 8. In addition, the card calculator having such a structure includes a surface sheet material 1, a frame member 5,
Reinforcing plate 6 and other components that form the outer shell of the card calculator are made thinner so that the outer dimensions of the case components are the same, and they are bonded together by thin adhesive layers 11 and 12 (see FIG. 2). The design of the card calculator makes it look more like a card.

In addition, the surface sheet material 1 corresponding to the display unit 2 and the battery unit 3
Nothing is printed from the back side of the surface sheet material 1 to the portion, so that the display 10 and the battery can be seen from the outside. In this case, since the display 10 is a card calculator, the thickness is limited, and a solar cell is used as a power source for the reason described below, and thus a low power consumption type liquid crystal display is preferable. Further, as described above, the parts constituting the outer shell of the card calculator cannot be disassembled because they are adhered to each other. Therefore, a solar cell that does not require replacement is suitable for the battery. In this case, the solar cell is also fixed on the printed circuit board 8 with a conductive adhesive or the like.

Conventionally, as a method of assembling such a card calculator, a surface sheet material and a reinforcing plate that have been removed one by one with a press or the like are attached to a frame member. However, in such a conventional method, the surface sheet material, the frame member, Positioning of the reinforcing plate is difficult, and as described above, it is extremely difficult to make the outer dimensions of each member the same and to align the end faces, and the completed card calculator has a drawback that the appearance is unsightly. Further, since each surface sheet material, reinforcing plate and the like are attached to the frame member one by one, the number of bonding steps is increased and the manufacturing cost is high.

The present invention has been made in view of the above points, has a good appearance, reduces the number of assembly steps such as bonding, and enables automatic assembly by a production line, and particularly an electronic device suitable for a thin electronic device such as a card calculator. It aims at providing the manufacturing method of.

In order to achieve this object, in a method of manufacturing an electronic device according to the present invention, a plurality of frame members, a key component, a display component, and a printed wiring are mounted on a substrate that is placed on a transfer means and moves in a predetermined direction. A step of mounting a plurality of electronic components composed of components and the like, withdrawing the sheet member from a sheet member rolled into a roll, and crowning the plurality of frame members and a plurality of electronic components, A step of sandwiching and fixing the plurality of frame members and a plurality of electronic components between the substrate and the sheet member; and a plurality of frame members including the sheet member and the substrate having an outer dimension smaller than an outer dimension of the frame member. A plurality of products each having an outer shell formed from the moving substrate and the sheet member, and a step of simultaneously cutting each product to form an outer shell of the plurality of products. Adopting a structure and a step of taking out.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5 of the accompanying drawings. In these drawings, the same reference numerals as those in FIGS. 1 and 2 indicate the same items.

First, referring to FIG. 3 showing an automatic assembling line of a card calculator, a reinforcing plate 14 having a hairline or the like printed on the bottom surface in advance by a transfer means 13 such as a belt conveyor and a pressure-sensitive adhesive applied on the top surface thereof. However, as shown in FIG. 4, it is sent to the process in the state of one plate before being cut into a predetermined shape (before cutting). Here, the reinforcing plate 14 functions as a substrate during assembly. In the step, the printed circuit board having a predetermined shape sucked by the air 15 or the like is arranged and bonded on the reinforcing plate 14 at predetermined intervals as shown in FIG. Components such as an LCD, an LSI chip, and a solar cell are mounted on the printed board 8 in advance. When the reinforcing plate 14 provided with the plurality of printed circuit boards 8 is sent to the process, each printed circuit board 8 is
The key rubber 7 formed by preforming at a predetermined position above is similarly sucked by the air 15 or the like, placed at a predetermined position on each printed circuit board 8 and sent to the process. In the process, the frame member 5 formed by pre-injection molding or the like is similarly sucked by the air 15 or the like to be arranged on each printed circuit board 8 and at the same time bonded to the reinforcing plate 14. At this time, the shape of the frame member 5 needs to be larger than the final shape of the electronic device. When the reinforcing plate 14 to which the frame members 5 are bonded in this manner is sent to the process, a pressure-sensitive adhesive material (not shown) is applied to the upper surface of each frame member 5 by the rollers 16 and the like. After the pressure sensitive adhesive is applied to the frame member 5 in this manner, the reinforcing plate 14 is sent to the process. In this step, as shown in FIG. 4, a front surface before cutting in which a plurality of key symbols and the like are printed in advance on the back surface at the same intervals as the plurality of frame members 5 arranged and bonded on the reinforcing plate 14. The sheet material 17 is capped and aligned on the plurality of frame members and then bonded. At this time, since the surface sheet material 17 is flexible, it is effective in terms of space if the surface sheet material 17 is supplied to the line from a rolled state as shown by 18 in FIG.

One sheet of top sheet material 17 that is larger than the above steps
A plurality of frame members 5 may be bonded between the reinforcing plate 14 and the reinforcing plate 14. When this is sent to the process, roller 1
The adhesive layer between the respective parts is pressed by 9 or the like to completely bond the respective parts. In this way, the surface sheet material 17 and the reinforcing plate 1
When a plurality of frame members 5 completely mounted between the frame members 5 are sent to the process, each frame member 5 is cut by a cutting press or the like equipped with a cutter 20 having a predetermined outer shape of a plurality of card calculators. Are simultaneously cut into a predetermined shape while the surface sheet material 17 and the reinforcing plate 14 are adhered by the number of the cutters 20, and a card calculator as a finished product of each unit is completed, and a guide member 21 (not shown) is used. Sent out.

In FIG. 4, L _c represents a cutting line, and FIG. 5 is an assembly flow chart showing the respective steps of FIG.

One embodiment of the present invention is as described above, and the size of the frame member is formed to be larger than the final shape of the electronic device and the cutting margin is provided, so that after cutting, the peripheral end face of the card calculator is the surface sheet material, the frame. A card calculator is manufactured that has a very clean appearance with no shape deviation with respect to members and reinforcing plates. Moreover, the assembly can be easily automated by using a line and can be applied even when the number of manufactured products is small.

Although the card calculator has been described in the embodiment of the present invention, the present invention can be applied not only to the card calculator but also to various thin electronic devices. Further, in this embodiment, the respective parts are fixed by adhesion, but the same effect can be obtained by using a method such as caulking.

As described above, according to the present invention, the external appearance is good, the number of assembling steps required for bonding members to each other is small, and the entire assembling work can be automated on the production line. It has features such as cost reduction.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a card calculator to which the method for manufacturing an electronic device according to the present invention is applied, and FIG. 2 is an A- of FIG.
A sectional view taken along line A, FIG. 3 is an explanatory view showing a production line of a card calculator manufactured by the method for manufacturing an electronic device according to the present invention, and FIG. 4 is each member of a plurality of steps in the production line shown in FIG. FIG. 5 is a perspective view collectively showing the arrangement state of FIG. 5, and FIG. 5 is a flowchart showing an assembling sequence of the card calculator based on the production line shown in FIG. 1 ... Surface sheet material, 5 ... Frame member 6 ... Reinforcement plate, 7 ... Key rubber 8 ... Printed circuit board, 11, 12 ... Adhesive layer 14 ... Reinforcement plate before cutting, 17 ... Surface sheet material before cutting 20 ... Cutter

Claims (1)

[Claims] 1. A plurality of frame members and a plurality of electronic components including a key component, a display component, a printed wiring component and the like are mounted on a substrate placed on a transfer means and moving in a predetermined direction. And a step of pulling out the sheet member from a sheet member rolled into a roll and covering the plurality of frame members and a plurality of electronic components with the plurality of frames between the substrate and the sheet member. A step of sandwiching and fixing a member and a plurality of electronic parts; and an outer shell of a plurality of products by simultaneously cutting and processing the sheet member and the substrate into a plurality of frame members with an outer dimension smaller than the outer dimension of the frame member. And a step of taking out a plurality of products having an outer shell formed from the moving substrate and the sheet member, the manufacturing of an electronic device. Law.