JPS62166590A - Parts mounting on circuit board - 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 [Field of Application] The present invention relates to a circuit board component mounting method for mounting a rubber switch on a stamp circuit board having rubber switch contacts.

[Conventional technology]

Conventionally, in aether devices such as audio equipment, a main body board is arranged horizontally within the main body of the device, and 121-way components are attached to this.

On the other hand, a display board is arranged on the display section on the front of the main body of the device, and components such as a display and operation switches are mounted and connected to this.

In this case, since the display board is located almost perpendicular to the main board, it is necessary to connect both boards, but in the past,
For example, Utility Model Application Publication No. 47-3248 and Utility Model Application No. 56-1
As seen in Publication No. 06476, a main body substrate and a display substrate are constructed in the same substrate, a dividing hole is provided between both substrates, and a flexible conductor is used to connect the two substrates. Separate the main body curtain plate and display board by inserting them into the holes,
The display substrate is arranged almost perpendicularly to the main substrate by utilizing the flexibility of the flexible conductor.

In this way, it is not necessary to separately form the main body substrate and the display substrate, and moreover, both substrates can be connected together by soldering (dip soldering).

By the way, when attaching a rubber switch to the display section of the aether device, it is necessary to print and form on the display board a contact point for a rubber switch that short-circuits via a metal plate when the switch is pressed.

However, when soldering a display board that has rubber switch contacts as described above, the solder adheres to the contacts, making it impossible to solder all at once. Previously, the board was separated from the main board and connected to the main board by manual soldering, which was extremely inefficient.

Also, when attaching the rubber switch to the display board,
Had to use double-sided adhesive tape.

8. In order to process external wire wiring by bulk soldering on a board with rubber switch contacts, is it possible to cover the contacts on the board with sticky tape to protect it? It is inconvenient because it sticks to the contact part and causes contact failure of the rubber switch.

[Problem that the invention seeks to solve]

Therefore, in accordance with the third aspect of the present invention, the above-mentioned points are taken into consideration, and when a rubber switch is mounted on a circuit board, external wiring is connected to one circuit board while reliably protecting the contacts for the rubber switch printed on the circuit board. The technical challenge is to provide a means to connect them all together by soldering.

[Means for solving problems]

In the method for mounting components on a circuit board of the present invention, an adhesive is printed and coated on a circuit board on which rubber switch contacts are printed, except for the contact portions, using a silk screen, and the adhesive is applied to the adhesive. A release paper covering the coated surface 2 and the contact portion is pasted, and the external circuit board is connected to the circuit board by soldering all at once.Then, the release paper is peeled off and a rubber switch is attached to the coated surface. It is characterized by being pasted.

[Effect]

Therefore, in the circuit board component mounting method of the present invention,
By printing and applying adhesive on the circuit board except for the rubber switch contacts, and pasting release paper on this,
The contacts are reliably protected and no solder adheres to the contacts even when external wiring is connected to the circuit board by soldering all at once.

In addition, after this batch soldering, by peeling off the release paper and pasting the rubber switch on the adhesive-coated surface, the adhesive printed and applied to affix the release paper for contact protection will secure the rubber switch. used for.

〔Example〕

Next, the present invention will be explained in detail with reference to drawings showing embodiments thereof.

6 and 7 show an in-vehicle spiritual device to which the present invention is applied, that is, a tape recorder with a radio, in which a display/operation section 121 is formed on the front of the device main body +11, and a tape cassette is inserted into this. opening (3), tape recorder operation manual 4), radio section display window 16), and display (LCD l) exposed to the outside through the display window (5).
61, s and a radio/clock operation button (7). This radio/clock operation button (7) is used to operate a rubber switch.

3 in Figures 1 to 5, (8) is a main body board that is arranged horizontally over almost the entire area of the device body (1) and has circuit wiring printed on the bottom surface, and (9) is a display/operation board. Part 12)
The main board (8) is located in the center of the front of the main board (8).
8) is a display substrate located almost perpendicular to the side substrate +81. +91 is formed integrally with the main substrate αO as shown in FIG. 4, and is located between the side substrates (8) and (9).

A long hole-shaped dividing hole (11) is provided to separate the side substrate +81. +91 is perforated dividing hole+
+21. Discarded board +141, +1 via t+3+
Connected by 51, 8th, discarded board t+41, Qω
By removing the side substrate +81. (91 is removed. (161 is the side board (81, (old split hole between 91)
This is a jumper wire that bridges the side substrates (81 and 491) and serves as external wiring for the display substrate (9).

(171 is a rubber switch attached to the front of the display board (9), and each operation button (7) of the display/operation section 12:
), eight recesses t18] are formed at positions corresponding to the respective details (the rear surface of 181, that is, the display substrate (9)
A key, ie a conductive shorting plate, is attached to the side surface.

(19) are rubber switch contacts that are printed on the front surface of the display board (9) and placed opposite the details (18), and when the details (181) are pressed, the key comes into contact with the contacts (19) and short-circuits them. do.

1201 is a bracket that holds the display device (6);
The bracket 201 is fixed by fitting the bracket (120+ constant force) into the square hole of the display board (9). The display device (6) held by this bracket is connected via zebra rubber (not shown) to zebra rubber contacts printed on the front surface of the display substrate (9). An example is the insertion hole for jumper wires (161) on the display board (9).

The weight is an adhesive printed and applied on the front surface of the display board (9) using a silk screen, and as shown in FIG. It is applied to the entire area except the insertion hole!24).

At the same time, the component mounting method of the above embodiment will be explained.

First, remove the main board (8) in the state of the main board αO shown in Figure $4.
2 and the lower surface of the display substrate (9) are printed with a circuit pattern made of conductive foil. At this time, the display board (9) has rubber switch contacts (191, zebra rubber contacts (c)).

Connection portions 2 of jumper wires (I) and their wiring patterns are formed.

Next, on the bottom surface of the display board (9) part of the main board αO, each contact +191, +231 part 2 and insertion hole (24) are installed.
Adhesive material 2151 is printed and applied by silk screen except for the parts, and adhesive material 2151 of the display substrate (9) is applied by printing.
A release paper (not shown) covering the lubricant weight and each contact point Q9) and +231 is pasted on. 8. This release paper is provided with holes corresponding to the jumper wire insertion holes (24).

Then, as shown in Fig. 4, jumper wires (161) are inserted into the jumper gland insertion holes of the main body board (8) and the display board (9), and in this state, both boards i81.
Apply bulk soldering (dip soldering) to 1, and connect both boards (8).
.

(9) Connect with a jumper wire (+61).
Various circuit components are mounted on the top surface of the main body board (8), and the legs of each component are soldered to the bottom surface of the board (8) by the aforementioned batch soldering. Here, the main board (
8) Measures are taken to cover the lower surface with a circuit pattern that does not require soldering, so that only the necessary parts are soldered.

After that, the main substrate αO is inserted into the perforated dividing hole t121. f
13), remove the discarded board +141 and (+51), bend the jumper wire (16) into an L shape, and stand the display board (9) perpendicular to the main board (8) as shown in Figure 5. Therefore, the surface of the display substrate (9) coated with the adhesive is located at the front.

Next, peel off the release paper on the front surface of the display board (9), and paste the rubber switch (+71) on the surface coated with the adhesive 251 so that the key of each detail 1.181 faces the contact (19). In addition, a display device (+1
) is attached so that the zebra rubber of the indicator (6) is in contact with the contact example.

[Effects of the Invention] As described above, according to the method for mounting components on a circuit board of the present invention, by applying an adhesive to a circuit board on which rubber switch contacts are formed and pasting a release paper on it, This makes it possible to reliably protect the contact points and connect external wiring to the circuit board by soldering all at once, reducing man-hours and improving work efficiency.Moreover, since the release paper is pasted, The adhesive material can be used for slidingly fixing the rubber switch, and the effect that a separate member for fixing the rubber switch is not required can be obtained.

If this invention is applied to a display board on which rubber switch contacts are formed and arranged separately from two main body boards as in the embodiment, the wiring for connection to the main body board can be soldered to the main body board at once. The display substrate and the main body substrate can be formed from the same substrate, and the number of man-hours can be significantly reduced.

[Brief explanation of drawings]

The drawings show an embodiment in which the circuit board component mounting method of the present invention is applied to in-vehicle electrical equipment. FIG. 3 is a front view of the display board after parts are installed; FIG. 3 is a side view taken along the line AA' in FIG. 2; FIG. 4 is a plan view of the main board in which the main board and display board are integrally formed; FIG. 1 is a perspective view of the main body board and the display board separated, and FIGS. 6 and 7 are a perspective view 2 and a front view of the external appearance of the electric device. (9) Display board, (161 jumper wire, (17
1...Rubber switch, (19)...Contact for rubber switch, External...Sliding material. Agent Patent Attorney Fuji 1) Ryotabe Figure 1 Figure 2 Figure 73 Figure 1b Shidashi Hachi-Ichihe Figure 4 Figure 45 Figure 6

Claims (1)

[Claims] 1. On the circuit board on which the rubber switch contacts are printed, an adhesive is printed and applied using a silk screen, except for the contact areas, and the surface to which the adhesive is applied and the contact areas are covered with the adhesive. A method of mounting components on a circuit board, characterized in that a release paper is attached to the circuit board, external wiring is connected to the circuit board by soldering all at once, and then the release paper is peeled off and a rubber switch is attached to the coated surface. Method.