JP2008046409A - Electronic handicraft teaching material and hobby decoration including electronic circuit, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a person who has no experience in soldering or a person having no expertise in electronic and electric circuits to easily produce electronic handicraft or a hobby decoration including the electronic circuit. <P>SOLUTION: The electronic circuit having one or a plurality of functions is stuck on an insulating board 1 with an adhesive as a module 14, and an electronic component 8 such as a chip LED is fixed and mounted. Drawing is then directly performed on a wiring circuit using a conductive paste 2. Further, a conductive paste 3 is used in place of solder so as to be arranged between the wiring and components, and then dried and cured. Thus, the electrical connection between an output component terminal and a power supply terminal is obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic work teaching material and a hobby decorative article having an electronic circuit in which soldering work is minimized, and a manufacturing method thereof.

  Conventional electronic work has been difficult for anyone because it requires a certain level of specialized knowledge and skill in soldering work. In addition, conventional ornamental products are mainly those that do not move as a still life. Furthermore, when using electronic circuits, some specialized knowledge is required, so there are few hobby ornaments using electronic circuits.

  Since the soldering work uses a soldering iron having a temperature exceeding 200 ° C., there has been a tendency that the soldering work is not adopted in recent years for safety in school education. For this reason, there are fewer practical trainings on electronics and electricity, and the current situation is that Japan's education is in danger as an electronic technology nation. With regard to electronics engineering, there is less practical education just by calling for manufacturing education, and we are worried about the future of Japan.

  People who have never been soldered or who have no specialized knowledge of electronic circuits and electric circuits are interested in electronic work and want to produce them, but they dislike that it is difficult to hear only electronic circuits. From the feeling, it was not easy to work on the production.

Under such circumstances, there has been a demand for a hobby ornament having an electronic work teaching material and an electronic circuit which are safe without soldering work, require no specialized knowledge, can be easily enjoyed, and are inexpensive.
JP 2005-142218 A "Introduction to electronic work that can be created" Tetsuya Gokan Technical Critic Publishing Co., Ltd. 2005

  The problem to be solved is that it is easy for people who have never performed soldering or who have no specialized knowledge of electronic circuits or electrical circuits to make electronic work or hobby decorations with electronic circuits. There is a point that cannot be tackled.

  In the present invention, an electronic circuit having one or a plurality of functions is modularized and other necessary parts are attached and mounted on an insulating substrate with an adhesive or the like, and then a wiring circuit is directly drawn using a conductive paste. In addition, the most important feature is that the wiring and the parts are assembled by using a conductive paste instead of solder and electrically connected.

  According to the present invention, there is an advantage that a hobby ornament having an electronic work teaching material and an electronic circuit can be easily manufactured without using the skill of soldering work and knowledge about the electronic circuit as the electronic work teaching material. In addition, it is safe without soldering at high temperatures and can be as simple as drawing, making it ideal for learning the basic technology of electronic circuits called wiring. In addition, hobby ornaments with electronic circuits can be easily manufactured, making them original ornaments only and providing a healing effect. Furthermore, the material used in the electronic work is an earth-friendly work material that does not use harmful substances, and the manufacturing process does not use a high temperature and has an energy saving advantage of heating only when necessary.

  The electronic circuit part with one or more functions is modularized, the necessary parts are fixed with adhesive, etc., mounted, then the wiring circuit is drawn directly using conductive paste, and the electrical connection between the wiring and the component terminals Realized by incorporating conductive paste instead of solder.

  As Example 1, the production of the decoration interior of the constellation shown in FIG. 7 using LEDs will be described. For example, an LED was placed on the constellation of the Big Dipper constellation, and an electronic circuit module was created that sparkled. The electronic circuit module is basically based on the one manufactured in advance in the mass production process, but it can also be made by itself.

  First, a manufacturing process for making an electronic circuit module as shown in FIG. 1 will be described. A component layout was examined in advance from a circuit diagram on an insulating substrate, and based on this, a transistor and a capacitor as components were attached with an instantaneous adhesive as shown in FIG. Although cardboard is used as the insulating substrate 1, a bakelite substrate or a glass epoxy substrate, which is a material for the printed circuit board, can also be used. An instant adhesive was used for fixing the parts. In the case of using cardboard as the substrate, it was found that the jelly-like adhesive is easy to use because the instant adhesive liquid is easy to penetrate into the paper.

  After fixing the components, the wiring between the component terminals was directly drawn with the conductive paste 2 as shown in FIG. For the electrical connection between the component terminals and the wiring pattern, the same conductive paste was used to deposit the conductive paste 3 like soldering. After the conductive paste was directly drawn or placed, it was dried and cured by exposure to warm air for 30 to 60 seconds with a commercially available hair dryer with an output of 700 W, and an electrical connection was obtained. When the specific resistance value of the wiring circuit was measured, it was about 0.0012 ohm · cm. The conductive paste used this time was flaky with silver particles of 1 to 15 microns. Instead of silver particles, depending on the application, it is also possible to use gold or copper particles. In addition, the conductive paste is a thermoplastic resin that is brittle after hardening and hard to crack, and the solvent is an acetate-based solvent with a boiling point of about 180 ° C. and a vapor pressure of 0.4 mmHg. In both cases, a solvent was selected that scatters in a short time when heated.

  If necessary, the copper foil 5 and the terminal portions 6 and 7 for external connection as shown in FIG. 5 can be attached as jumper wires as shown in FIG. For the jumper wire, as shown in FIG. 4, after confirming the continuity of the circuit drawn and dried and cured with a conductive paste, the crossed lower wiring pattern portion was covered with the insulating tape 4 with adhesive, and then cut copper. The foil 5 was attached with an instantaneous adhesive. In this case, the copper foil needs to be longer than the portion of the insulating tape 4 with adhesive. If it is short, the conductive paste 3 is applied onto the insulating tape 4 with adhesive, and after the conductive paste is cured, cracks are generated at the boundary due to thermal expansion of the insulating tape 4 with adhesive, which may cause disconnection. There were many. As for the external terminal portion, the copper foil was cut to a required size as shown in FIG. 5 and attached with an instantaneous adhesive. Forgetting to draw the wiring pattern and applying the conductive paste 3 for connecting the component terminals was performed each time. Exposure to warm air for about 30 to 60 seconds with a hair dryer of about 700 W did not damage the parts.

  Next, the fabrication of the LED panel will be described. First, an electronic circuit module manufactured in a self-made or mass production process was attached to a constellation cardboard with an adhesive or a double-sided adhesive tape. The LED of the favorite color was confirmed on the part of the constellation in FIG. 6 and the electrode direction was confirmed as shown in FIG. Next, as shown in FIG. 8, the output terminal of the electronic circuit module was directly drawn with the conductive paste 2 so that the LED terminal was positively connected to the anode and cathode. Further, the conductive paste 3 was placed so as to be soldered for bonding to the LED electrode. Thereafter, electrical connection could be obtained by exposure to warm air with a hair dryer.

  If there are additional LEDs to be installed, they can be added each time. In that case, as described above, additional LEDs can be attached by attaching the LED to be added with a momentary adhesive, drawing a branch wiring with a conductive paste from a nearby wiring pattern, and exposing it to the warm air of a hair dryer. Since the wiring resistance value of the LED arranged far from the power supply becomes high, when the brightness of the LED is dark, the redundant wiring 9 as shown in FIG. 9 can be additionally drawn to make it brighter.

  By connecting the electronic circuit module 14 shown in FIG. 5 and the LED panel 13 shown in FIG. 9 by soldering 11, a circuit as shown in FIG. 10 was formed, and blinking of the LED was confirmed. Finally, the constellation panel 12 punched out of the LED blinking part as shown in FIG. 11 was affixed, and the constellation's self-made decoration using electronic work was completed.

  In Example 2, a transparent acrylic plate was used for the insulating substrate 1 in the manufacturing process for making the electronic circuit module used in Example 1 by itself. A drawing sheet describing the layout and wiring of the electronic component was placed under the acrylic plate, and the electronic component was fixed directly to the acrylic plate with an instantaneous adhesive. Next, a circuit was directly drawn with a conductive paste on an acrylic plate on which components were fixed in the same manner as in Example 1. By doing in this way, the electronic component mounting position and the pattern wiring were definitely made as designed. The insulating substrate 1 used in Example 2 is not limited to an acrylic plate, but can be an organic material such as PE (polyethylene), PET (polyethylene terephthalate), vinyl chloride, PP, etc., as long as it is transparent and shows a circuit diagram underlaid. Materials and inorganic materials such as glass plates that can withstand high temperatures can also be used. Since the drawing is performed with the conductive paste, the insulating substrate 1 does not need to be a flat surface, and drawing on a curved surface such as a glass bottle or a PET bottle is also conceivable.

  Further, for the LED panel 13 of Example 1, a transparent acrylic plate was used. A constellation pattern was placed under the acrylic plate, and the LED was attached directly to the acrylic plate with an adhesive. As a result, the LED can be fixed in an accurate position and wiring errors can be reduced. Then, as in Example 1, the output terminal of the electronic circuit module was directly drawn with the conductive paste 2 so that there was no doubt that the LED terminal was the anode / cathode. Further, the conductive paste 3 was placed so as to be soldered for bonding to the LED electrode. Thereafter, electrical connection could be obtained by exposure to warm air with a hair dryer.

  The present invention can be applied not only to hobby ornaments having electronic work materials and electronic circuits, but also to trial use of electronic circuits using surface-mounted components. That is, after the components are arranged on the insulating substrate and fixed, a circuit pattern is drawn with a conductive paste, and the circuit is operated simply by arranging the pattern and component terminals with a conductive paste instead of solder. Therefore, since the circuit confirmation can be easily performed in a short time, there is a great possibility of industrial use as a prototype of an electronic circuit.

LED flashing circuit diagram Placement and fixing of electronic circuit module chip parts Wiring and bonding of electronic circuit modules using conductive paste How to make jumper wires for electronic circuit modules Explanation of creating external electrode part of electronic circuit module Constellation (eg, Big Dipper) LED placement / fixation of LED panel Wiring and bonding including external electrodes using conductive paste for LED panels Redundant wiring explanation of LED panel Lead wire connection between electronic circuit module and LED panel Installing the constellation panel

Explanation of symbols

1 Substrate (cardboard)
2 Conductive paste wiring 3 Connected conductive paste 4 Insulation material for jumper wires (insulating tape with adhesive)
5 Conductor for jumper wires (copper foil)
6 Conductive material for external electrode (output side)
7 Conductive material for external electrode (power supply side)
8 chip LED
9 Redundant wiring with conductive paste 10 Lead wire 11 Soldering 12 Constellation panel 13 LED panel 14 Electronic circuit module

Claims (3)

  An electronic circuit such as LED lighting / flashing and music box, etc., and an expression output such as LED and speaker are not installed at first. After mounting, such as by pasting the output output such as LED and speaker, etc., the wiring between terminals is done with conductive paste, and the connection with the component terminal is replaced by soldering A hobby ornament having an electronic work teaching material and an electronic circuit, characterized in that it is performed with a conductive paste, and a method for manufacturing the same.   In the connection between the external terminal and the external lead wire according to claim 1, a copper foil piece is attached to the external connection terminal portion with an adhesive, and after the adhesive is cured, the external lead wire is soldered to the copper foil piece and connected. A hobby ornament having an electronic work teaching material and an electronic circuit, and a method of manufacturing the same.   3. The cross-wiring of the wiring circuit on the panel or object of the self-designed design according to claim 1, wherein the wiring portion that becomes the lower wiring of the crossing is covered with an insulating resin or an insulating tape with an adhesive, and then bonded to become the upper wiring of the crossing. Adhesive adhesive copper foil or small piece of copper foil with adhesive, and the length of the copper foil on the upper wiring is longer than the width of the insulating resin coating or the insulating tape with adhesive. Hobby ornaments possessed and manufacturing method thereof.

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