JPH08130147A - Electric and electronic part - Google Patents

Abstract

PURPOSE: To make it possible to mount an electric or electronic part on a printed circuit board instantaneously with a good yield, in which the parts are mounted in a compact body that is resistant to external pressure and not coming off even when the printed circuit board is bent. CONSTITUTION: A housing including an inner main assembled part has a leg part 4 on the lower side. The leg part 4 is inserted in a hole 111 formed on a printed circuit board 100. In the leg part 4, a terminal is provided as a fitting member 9 for preventing the coming-off, while the other round plate-shaped terminal 8 is provided at a lower face of the housing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric / electronic component which can be mounted on a printed wiring board with one touch.

[0002]

2. Description of the Related Art Electrical and electronic parts mounted on a printed wiring board include contact switches, fuses, connectors, conductive and insulating parts such as capacitors, Cds photoelectric cells, phototransistors, light emitting diodes, and other elements. There are various types.

FIG. 17 shows a light emitting diode 60 which is one of conventional electronic parts. The light emitting diode 60 is a housing formed by attaching a case 61 made of transparent acrylic or glass on a base 62. Light emitting diodes 66 and 67, which are PN-junctioned, are provided between the upper ends of the two lead wires 63 and 64, and these two lead wires 63 and 64 are elongated from the inside of the housing toward the outer downward direction. It is projected. Reference numeral 65 is a bond wire.

FIG. 18 shows a method of mounting the light emitting diode 60 on the printed wiring board 200. The lead wires 63, 63 are provided in the pores formed at appropriate places of the printed wiring board 200.
The lower end portions 63a and 64a of the lead wires 63 and 64, which are inserted through the wiring board 200 and project from the lower surface of the wiring board 200, have the conductive patterns 3 formed on the lower surface of the printed wiring board 200.
00, the remaining lead wires 63, 64
And the conductive pattern 300 are soldered (pin insertion mounting method). P is the build-up portion of the solder.

In addition to the above, a method of mounting a component by soldering a lead wire to an appropriate position of a conductive pattern on the surface of the printed wiring board (surface mounting method), a bare component without a lead wire of a linear printed wiring board is used. There is a method of soldering and mounting the conductive pattern at an appropriate place (chip-on-boat).

FIG. 19 is a front view of a printed wiring board 200 on which various electric and electronic parts are mounted by the above method, and FIG.
0 is the back view. As shown in FIG. 19, on the surface 201 of the printed wiring board 200, electric / electronic components such as the connection line 90, the light emitting diode 60, the capacitor 70, and the IC chip 80 are mounted in a state of protruding upward. Further, as shown in FIG. 20, a foil-shaped conductive pattern 300 is formed on the back surface 202 thereof.

[0007]

However, when the electric / electronic components are soldered and mounted on the printed wiring board as described above, the following problems are likely to occur.

[0008] Firstly, it is due to the quality of soldering,
This includes defective connections due to poor solder wetting, repelling of solder, and other non-attached solder, blowholes and pinholes, and the like. Of course, it is possible to reduce the probability of defective products by improving the solder, improving the soldering method, improving the environment in the factory, etc., but even with the current technology, these measures have been fully exhausted. Regardless of the pin insertion mounting method or the surface mounting method, 95% or more of process defects are caused by this.

Secondly, one side of the printed wiring board may be thermally expanded and warped by the heat when soldering, which may cause interference with other parts. In particular, as shown in FIG. 20, it tends to occur when the surface to be soldered is concentrated on one surface of the printed wiring board.

Thirdly, there is a possibility that the electric / electronic parts may be damaged by the heat when soldering. This is especially likely to occur in the case of surface mounting. Further, this heat may deteriorate the printed wiring board, and subsequent vibrations, bending, external pressure, tension, etc. may cause the accidental parts such as cracks to concentrate on a certain part. These damages and accidents also lead to secondary disasters such as the breakdown of products equipped with printed wiring boards. In addition, the lens such as the light emitting / receiving element and the reflector may be clouded by the heat due to the soldering and the function may not be sufficiently exhibited.

Fourth, it is necessary to wash and remove impurities attached to the printed wiring board by soldering.
There are problems with this cleaning. Currently, CFCs used as cleaning liquids are being replaced with CFC alternatives because they cause ozone layer destruction.However, CFC alternatives currently used do not have any adverse effect on the environment. There is also a problem with processing, and it would be best not to wash.

Fifth, many surface mount components do not have a lead structure as a stress buffer material. For this reason, when an external pressure such as a vibration or an impact due to a drop is received, high stress and risk are likely to occur in the solder connection portion. In particular, electronic devices have become more compact and portable than ever before, and under such circumstances, they are more likely to be subjected to external pressure such as vibration or shock when being carried or transported.

Sixth, in the case where the wiring board is a flexible printed wiring board that flexibly bends, the lead wire is pulled due to the bending of the wiring board, the solder is removed from the bonded portion, and the lead is inserted from inside the electronic device. The line comes off,
Is easy to occur. Further, the lead wire may be fatigued by the metal and may be broken.

The present invention has been proposed in view of such circumstances, and is formed on a printed wiring board at a lower portion of a housing having therein a main assembly such as a pellet, a cell, a relay, a resistor, and a light emitting element. The leg for inserting and mounting in the hole is projected downward of the housing, and the retaining locking piece that also functions as a retainer and one terminal projects laterally from inside the leg, and the other By equipping the lower surface of the housing centering around the leg part with the terminal of, the electric and electronic parts can be mounted on the printed wiring board with one touch, the yield due to mounting is kept low, and the shape after mounting is also It is an object of the present invention to provide an electric / electronic component that is not bulky, is strong against external pressure, and does not come off even when a printed wiring board is curved.

[0015]

The electric / electronic component according to the first aspect of the present invention, which is proposed to achieve the above object, is formed on a printed wiring board at a lower portion of a housing containing a main assembly. A leg portion for inserting and mounting in the opening is formed in a protruding manner, one terminal is constituted by a retaining engagement piece protruding laterally from inside the leg portion, and the other terminal is formed in the above-mentioned manner. It is provided on the lower surface of the housing.

Further, in the electric / electronic component according to the second structure of the present invention, in addition to the above structure, the terminal provided on the lower surface of the housing has a wheel plate shape centering on the leg portion. Is characterized by.

[0017]

The electric / electronic parts of the present invention include conductive / insulating parts such as fuses, connectors and capacitors, Cds photoelectric cells,
It is a generic term for light emitting / receiving elements such as phototransistors, light emitting diodes, etc. It is mounted on a printed wiring board, especially a flexible printed wiring board, and acts as individual parts.

In the printed wiring board to be connected to the electric / electronic component of the present invention, the conductive pattern is not a copper foil, but fine copper wires are twisted together into a thread shape, which is woven into a grid shape like a cloth. Composed of formed.

An opening having a size corresponding to the leg of the electric / electronic component is formed at a portion of the printed wiring board where the electric / electronic component is required to be mounted. The opening is a printed wiring board. Down to the conductive pattern on the lower side of.

To mount the electric / electronic component of the present invention, the legs are inserted into the holes so that the terminals on the lower surface of the housing are brought into contact with the conductive patterns on the upper surface of the printed wiring board.
The terminal is formed by locking the terminal, which is formed by the retaining locking piece protruding laterally from the inside of the leg, into the conductive pattern on the lower surface side or the inner side of the printed wiring board.

When the electric / electronic component is mounted on the printed wiring board in this manner, the insulating substrate and the conductive pattern are made of a flexible material, and the size of the opening formed in the insulating substrate and the conductive pattern is made to correspond to the leg portion. Since the conductive pattern sandwiched between the lower surface of the housing and the retaining locking piece is slightly compressed, the electric and electronic parts are firmly mounted, and the electric and electronic parts may become loose or accidentally come off. There is no such thing.

Further, even if an electronic device or the like on which these electric / electronic parts are mounted is inadvertently dropped, vibrated, or shocked, the conductive pattern on the upper surface of the printed wiring board is braided to retain elasticity. Therefore, this serves as a buffer to protect the mounted components.

In the case of a flexible printed wiring board,
If this wiring board is bent or twisted, the spacing between the terminals of individual parts will change in the past, so the lead wire will be pulled and the soldering point will come off, or the lead wire will pull out. As a result, if the terminal positions of the two terminals are located above and below the printed wiring board as in the present invention, the printed wiring board may be bent or twisted greatly. Even if it does, the distance between the terminals does not change, and almost no stress is applied to the bending of the legs. Therefore, the parts do not come off or break.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific configurations of electric and electronic parts of the present invention and mounting methods thereof will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a state before adhesion of a printed wiring board on which electric and electronic parts of the present invention are mounted, and FIG. 2 is a perspective view showing a state after adhesion.

As shown in FIGS. 1 and 2, the printed wiring board 100 for mounting the electric / electronic parts of the present invention is made of an insulating substrate 104 made of epoxy resin or flexible vinyl which can be bent and bent freely. A conductive material 101, 102 formed by weaving wire-like wires formed by weaving ultrafine conductive wire materials 101a, 102a made of copper on both sides and braiding it like a cloth so that it can be bent and bent freely. Are pressure-bonded (or bonded), and the outer surfaces of the conductive materials 101 and 102 are covered with flexible insulating layers 103 and 105.

In each of these figures, the conductive material 101,
In order to clearly show the braided structure, reference numeral 102 shows a shape before being formed into a conductor pattern, but actually, the conductive material 101, 102 is subjected to etching processing or the like.
What is formed in the conductor pattern of arbitrary shape is used.

As shown in FIG. 2, an opening 111 for mounting an electric / electronic component, which will be described later, is formed in an appropriate place of the printed wiring board 100, and the insulating layer 103 on the upper surface side of this place is formed. An opening 110 having a diameter larger than that of the opening 111 is formed in the. The sizes and the like of these openings 110 and 111 will be described later in the section of electric / electronic components.

FIG. 3 shows one of the electronic and electric parts of the present invention.
FIG. 4 is a perspective view showing the fluorescent light emitting diode 1 which is one of FIG.
Is a front sectional view showing a method of mounting the phosphor light emitting diode 1 on the printed wiring board 100, and FIG. 5 is a bottom view of the phosphor light emitting diode 1.

As shown in each of these figures, the phosphor light emitting diode 1 has an upper edge 3a of a base 3 formed in a circular shape in plan view.
A low-bulk housing to which a case 2 formed of transparent resin or transparent glass is attached is configured, and a cylindrical leg portion 4 formed of an insulating material is provided on the bottom surface 3a of the base 3 that is the housing. It is formed so as to integrally project downward from the center.

A ring plate-shaped terminal 8 to which one end of a lead wire 6 is connected is adhered to a bottom surface portion of the base 3 around the leg portion 4 as a center. A lead wire 7 supported by a support member 4c is located at a position reaching the inside of the case 2, and a PN-bonded infrared ray is provided between an upper end of the lead wire 6 and an upper end of the lead wire 7. A light emitting diode 5 is provided. 7c is a bond wire.

It is most preferable that the terminal 8 is of a wheel plate shape regardless of the mounting direction, but a plurality of terminals are provided in a virtual arc shape of the bottom surface 3a of the base 3 with the leg 4 as the center. It does not matter even if it is a thing.

An opening 4 is formed in the side surface of the leg 4 near the lower part.
b is formed, and a retaining locking piece 9 composed of a terminal with its tip protruding outward from the inside of the space 4d behind the opening 4b is provided at the upper end having a biasing force in the outward direction. One end of the lead wire 7 is connected to the retaining engagement piece 9.

The lower surface of the side end of the slip-out prevention locking piece 9 is formed in a sloped shape that rises from the base to the side end.
When the leg portion 4 is inserted into the opening of the printed wiring board 100, the retaining locking piece 9 comes into contact with the side edge of the opening 111 and retracts into the leg portion 4, and the tip of the retaining locking piece 9 is inserted. When the conductive pattern 102 reaches the conductive pattern 102, the conductive pattern 102 is pierced and bonded. In this state, the wheel-shaped terminal 8 is in contact with the upper surface of the upper conductive pattern 101.

In this way, the printed wiring board 10 made of the conductive material 101 or less is formed by the lower surface 3a of the base 3 and the retaining engagement piece 9.
Since the conductive material 101 sandwiching 0 is compressed to some extent and a repulsive force against it is generated, the phosphor light emitting diode 1 is securely mounted on the printed wiring board 100.

Moreover, the head portion of the fluorescent light emitting diode 1 which is formed to be bulky falls into the opening 110 of the insulating layer 103, and the fluorescent light emitting diode 1 is attached to the printed wiring board 100.
It is designed so that it does not protrude from the inside.

FIG. 6 shows one of the electronic and electric parts of the present invention.
FIG. 7 is a perspective view including a partial cross-sectional portion showing a Cds cell 10 which is one of the two. FIG.
It is a front sectional view showing a method of mounting on No. 00.

In the description of FIGS. 6 and 7, for convenience, the same parts as those in FIGS. 1 to 5 are designated by the same reference numerals and the description thereof will be omitted.

The Cds cell 10 is an optical sensor which utilizes the property that when light hits a semiconductor, the electrons are excited to become free electrons and the electric resistance is reduced.

As shown in FIGS. 6 and 7, the Cds cell 1
0 indicates that the Cds cell layer 77 is located on the base 3 made of ceramic, and the electrodes 11a and 11b are located on the upper surface thereof. It is connected to the stopper 9 and the terminal 8. 78
Is a Cds cell image formed on the upper surface of the Cds cell layer 77.

The printed wiring board 100 used in FIG. 7 is one in which a conductive material 102 is embedded in an insulating substrate 104. In this figure, the retaining locking piece 9 pushes up the conductive material 102 from the lower surface. Connecting.

In this structure, the leg portion 4 is formed in a tubular shape, and the retaining engagement piece 9 is attached to the end of the thick lead wire 7 which holds the biasing force for directing the retaining engagement piece 9 to the outside. It is a supported structure. Further, a notch 9a is formed at the lower end of the base of the slip-out preventing piece 9, and an extremely fine jig is projected from the opening 4a at the lower end of the leg 4 to make the notch 9a.
By operating a, the retaining locking piece 9 can be retracted. This retreat operation checks the Cds cell 10 once mounted in the printed wiring board 100.
It is for removal by replacement.

The printed wiring board 1 of the Cds cell 10
Since the method of mounting to 00 is the same as that described above,
It is omitted for convenience.

FIG. 8 shows one of the electronic and electric parts of the present invention.
2 is an exploded perspective view of the keyboard switch 20, which is
FIG. 9 shows the keyboard switch 20 and the printed wiring board 100.
FIG. 3 is a front cross-sectional view showing a method of mounting on.

Note that, also in FIGS. 8 and 9, for convenience, the same parts as those in FIGS. 1 to 8 are designated by the same reference numerals, and the description thereof will be omitted.

Keyboard switch 2 shown in FIGS. 8 and 9.
0 is the pressing member 22 and the rubber body 2 that pushes up the pressing member 22.
1 and a switch body 23.

In the switch body 23, the leg member 4 projects from the lower portion of the base 3, and the contact switches 7a and 7b connected to the lead wires 6 and 7 are located above the leg member 4, and these contact points are provided. The switch 7a is turned on by pressing the pressing member 22.

The printed wiring board 100 on which the keyboard switch 20 is mounted is made of a hard material, and a resin cover (case) 24 is provided above the printed wiring board 100 to prevent the pushing member 22 from popping out. .

FIG. 10 is a front sectional view showing a method of attaching the connector 30, which is one of the electronic / electrical components of the present invention, to the printed wiring board 100.

Also in this figure, for convenience, FIGS.
The same parts as those in FIG.

The connector 30 shown in FIG. 10 is mounted near the side end of the printed wiring board 100 to connect the external electric wire 35 to the printed wiring board 100 side. The leg 4 is located on the lower surface, and the opening 31b formed on the upper side of the leg 4 serves as an insertion port for the connection wire 35. The connection terminals 32 and 33 are provided in the opening 31b. Is connected to the terminal 8 and the pin 9 via the lead wires 6 and 7 in the connector 30. Reference numeral 36 is a jacket of the lead wire 35.

FIG. 11 is a perspective view showing a fixed resistor 40 which is one of the electronic / electrical parts of the present invention, and FIG. 12 is a front sectional view showing a method of mounting the fixed resistor 40 on the printed wiring board 100. Is.

Also in this figure, for convenience, FIGS.
The same parts as 0 are assigned the same reference numerals and explanations thereof will be omitted.

As shown in FIG. 11 and FIG. 12, the fixed resistor 40 of this configuration has the resistance element 40a in the leg portion and the head portion 3 is formed substantially flat so that the bulkiness after mounting is as large as possible. It is configured to hold down.

Although the respective electronic / electrical parts have been described above, these are merely one aspect of the electric / electronic parts of the present invention, and these parts are not limited. For example, the capacitor 40 shown in FIG. Includes various electrical and electronic components.

FIG. 14 is a schematic perspective view showing the (flexible) printed wiring board 100 on which the electric / electronic parts of the present invention are mounted by bending, and FIG. 15 is a schematic side view showing the same by bending.

As shown in each of these drawings,
The printed wiring board 100 on which the electronic components are mounted may be a hard wiring board, but when mounted on a flexible printed wiring board, the mounting effect of the electric and electronic components of the present invention is increased.

That is, the flexible printed wiring board 1
Even if 00 is twisted or folded as shown in the figure, the contact spacing between the retaining locking piece and the terminal and the conductive material (conductive pattern) does not change. Since it is not used and the electric / electronic parts are not mounted on the chip on board, the mounted electric / electronic parts are not accidentally detached or damaged.

Particularly, since the heads of the electric and electronic parts are made bulky and the lower part of the printed wiring board 100 is dropped, the whole printed wiring board 100 on which the electric and electronic parts are mounted does not become bulky. Therefore, even if it is folded in two as shown in FIG. 15, it is possible to minimize the interference between electric and electronic components.

FIG. 16 is a perspective view showing an electric light sheet 200 on which the electric and electronic parts of the present invention are mounted. An electric light sheet 400 shown in this figure is obtained by covering the flexible printed wiring board 100 on which the electric / electronic component of the present invention is mounted with a sheet material 410 such as a flexible resin in an airtight state to form a sheet shape of this sheet material 410. The light emitting component 50 is provided inside the thin character portion 401 that is formed by being raised on one surface.
It has 0s arranged side by side.

The power source may be a solar cell provided in the sheet material 410, or may have a structure in which an electric wire is drawn from the outside.

The light emitting sheet 400 having the above structure is
It can be used for various things such as stickers attached to the back of automobiles and display boards in roads and buildings.

[0063]

When the electric / electronic component of the present invention described above is mounted on a printed wiring board and used, the following effects are exhibited.

First, since the electric / electronic component of the present invention can be mounted on a printed wiring board with one touch without soldering, the defective connection that occurs when soldering as in the conventional case is eliminated. In addition, it is possible to eliminate the adverse effect on the printed wiring board and the electric / electronic parts due to the heat of soldering, and also to eliminate the need for cleaning after soldering.

Secondly, the mounting can be easily performed by simply inserting the legs into the holes formed in the printed wiring board, and even after the mounting, the conductive pattern (conductive material) on the printed wiring board side can be formed. It uses elasticity to hold it securely and has a cushioning property against external pressure, so it will not accidentally come off or be damaged. In particular, the two contacts that connect the electric / electronic components to the printed wiring board are in the thickness direction of the printed wiring board.
Since the legs of the book are inserted into the holes and mounted, even if the printed wiring board is bent or folded in two, the distance between these two contacts does not change, and electrical and electronic parts are pulled and damaged. It does not cause the contact to come off or come off.

Furthermore, since the electric and electronic parts of the present invention are mounted on the printed wiring board in a low volume, interference between the electric and electronic parts is reduced even when the printed wiring board is bent and folded in half, and the parts are damaged. You can prevent it to the maximum.

[Brief description of drawings]

FIG. 1 is a perspective view showing a printed wiring board on which electric and electronic components of the present invention are mounted before being bonded.

FIG. 2 is a perspective view showing a state after the same adhesion.

FIG. 3 is a perspective view showing a phosphor light emitting diode which is one of the electronic / electrical components of the present invention.

FIG. 4 is a front cross-sectional view showing a method for mounting a phosphor light emitting diode on a printed wiring board.

FIG. 5 is a bottom view of a phosphor light emitting diode.

FIG. 6 is a perspective view including a partial cross-sectional view showing a Cds cell which is one of the electronic / electrical components of the present invention.

FIG. 7 is a front cross-sectional view showing a method of mounting a Cds cell on a printed wiring board.

FIG. 8 is an exploded perspective view of a keyboard switch that is one of the electronic / electrical components of the present invention.

FIG. 9 is a front cross-sectional view showing a method of mounting a keyboard switch on a printed wiring board.

FIG. 10 is a front sectional view showing a method of mounting a connector, which is one of the electronic / electrical components of the present invention, on a printed wiring board.

FIG. 11 is a perspective view of a fixed resistor that is one of the electronic / electrical components of the present invention.

FIG. 12 is a front sectional view showing a method of mounting a fixed resistor on a printed wiring board in the same manner.

FIG. 13 is a front sectional view showing a capacitor which is one of the electronic / electrical parts of the present invention.

FIG. 14 is a schematic perspective view showing a (flexible) printed wiring board on which the electric / electronic component of the present invention is mounted, in a bent state.

FIG. 15 is a schematic side view showing the same in a bent state.

FIG. 16 is a perspective view showing a lightning sheet on which the electric / electronic component of the invention is mounted.

FIG. 17 is a perspective view showing a light emitting diode which is one of conventional electric / electronic components.

FIG. 18 is a front sectional view showing a method of mounting the light emitting diode on the printed wiring board in the same manner.

FIG. 19 is a front view of a printed wiring board on which various conventional electric and electronic components are mounted.

FIG. 20 is a rear view of the same.

[Explanation of symbols]

 1 Fluorescent Light Emitting Diode 2 Case 3 Base 4 Legs 6 ・ 7 Lead Wire 8 Terminal 9 Locking Engagement Piece 10 Cds Cell 20 Keyboard Switch 30 Connector 40 Fixed Resistance 50 Capacitor 100 Printed Wiring Board 101, 102 Conductive Material 101a , 102a conductive wire 103, 105 insulating layer 104 insulating substrate

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[Procedure amendment]

[Submission date] March 14, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 19

[Correction method] Added

[Correction content]

FIG. 19

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 20

[Correction method] Added

[Correction content]

FIG. 20

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H05K 1/18 B 8718-4E

Claims (2)

[Claims] 1. A leg portion for inserting and mounting in a hole formed in a printed wiring board is formed in a lower portion of a housing in which a main assembly is installed, and one terminal is located inside the leg portion. An electric / electronic component comprising a retaining locking piece that projects toward one side, and the other terminal is provided on the lower surface of the housing. 2. The electric / electronic component according to claim 1, wherein the terminal provided on the lower surface of the housing has a wheel plate shape centered on the leg portion.