JPH0629639A - Circuit board - Google Patents

Abstract

PURPOSE:To obtain a circuit board of a structure, wherein the situation of connection of electrical components can be efficiently identified, by a method wherein electrode parts are bridged over insulating parts, are connected to the insulating parts and the electrical components are electrically connected to the circuit board. CONSTITUTION:A circuit board 11 consists of an insulating board 12 and patterns 13 on the surface of the board 12, electrical elements (electrical components) 15 are formed into the form of a rectangular parallelopiped, planar electrode parts 16 are respectively formed on both ends in the longitudinal direction of each element 15, lands 17 to correspond to the electrode parts 16 of each element 15 are respectively formed on both ends of each pattern 13 in a wide form and insulating parts 18 are formed between the lands 17. The electrode parts 16 are laid over the insulating parts 18 between the land parts 17, on which the electrode parts 16 of the elements 15 are soldered and fixed, and are connected to the insulating parts 18 to couple the patterns 13 with each other and if the elements 15 have a defective connection, such as an unmounting, for forming a circuit, the circuit is not formed. Accordingly, the state of connection of the elements 15 can be detected efficiently and easily by conducting automatically a continuity test for electrical characteristics during an automatic process for connecting the elements 15 to the board 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board for connecting an electric component to a pattern.

[0002]

2. Description of the Related Art Conventionally, for example, a structure shown in FIG. 7 is known as a circuit board provided with a pattern having a round for soldering an electrode portion of an electric component.

In the circuit board 1 shown in FIG. 7, a wiring pattern 3 is provided on the surface of a substrate 2 made of an insulating material. Further, a circular round 4 is formed at a predetermined position of the pattern 3, and a through hole 7 through which a lead wire 6 which is an electrode portion of the electric component 5 is inserted is formed substantially at the center of the round 4. is doing. Then, the lead wire 6 of the electric component 5 is inserted from the back surface of the circuit board 1, and the lead wire 6 is soldered to the round 4 to fix the electric component 5.
To form.

[0004]

However, in the circuit board having the above-described conventional structure, as shown in FIG. 7, since the pattern 3 is continuous, the electrical component 5 is not connected in the continuity test based on the electrical characteristics. However, since the continuity is obtained, the detection of the connection state of the electric component 5 requires a troublesome visual inspection, an expensive image recognition device, or the like, and particularly in the case of a cascade connection. There is a problem with the confirmation.

The present invention has been made in view of the above problems, and provides a circuit board that can be easily and inexpensively detected at the time of measuring electrical characteristics during a manufacturing process, and can efficiently identify the connection status of electrical components by automation. To do.

[0006]

A circuit board of the present invention is a circuit board provided with a pattern having rounds for electrically and mechanically connecting and fixing electrode parts of an electric component.
The rounds are formed so as to be electrically separated from each other in an insulating portion, and a circuit is formed by connecting and electrically connecting the electrode portions to the insulating portion.

[0007]

According to the circuit board of the present invention, a circuit is formed by electrically connecting the pattern to the round insulating part for electrically and mechanically connecting and fixing the electrode part of the electric component to electrically connect the pattern. Therefore, during the process of connecting the electric components to the circuit board, the continuity test of the electric characteristics can be automatically performed, and the connection state of the electric components can be efficiently and easily detected without performing a visual inspection, which is expensive. It is possible to easily identify the connection status of the electrical components without using any detection device.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the circuit board of the present invention will be described below with reference to FIG.

Reference numeral 11 denotes a circuit board. The circuit board 11 is composed of a board 12 made of an insulating material and a pattern 13 electrically wired on the surface of the board 12 according to a circuit design.

On the other hand, 15 is a surface-mounted electric element as an electric component, and this electric element 15 is formed in a rectangular parallelepiped shape, and surface-shaped electrode portions 16 are formed at both ends in the longitudinal direction.

The pattern 13 on the circuit board 11 has a round shape 17 corresponding to the electrode portion 16 of each electric element 15 in a wide shape at both ends.
Are formed. The round 17 is formed with an insulating portion 18 which is separated by a predetermined insulating distance.

Next, the operation of the above embodiment will be described with reference to FIGS.
It will be described based on.

Round of two patterns 13 on circuit board 11
The electrode portion 16 of the electric element 15 is erected and placed on the insulating portion 18 of the electric element 17, and the electrode portion 16 is soldered to the round 17 to form the electric element.
Connect and fix 15. Then, the circuit shown in FIG. 2 is formed by soldering the electrode portion 16 of each electric element 15 and the round 17 of the pattern 13.

Next, the structure of the circuit shown in FIG. 2 will be described with reference to the drawings.

The circuit shown in FIG. 2 is a circuit diagram of a ballast of a lighting fixture for two fluorescent lamps, and a filter circuit 21, a full-wave rectification circuit 22, a smoothing circuit 23, and a commercial AC power source are provided.
Inverter circuits 24 are formed in cascade connection.

As shown in FIG. 2, a filter circuit 21 is connected to the commercial AC power supply. In this filter circuit 21, a first capacitor C1 for noise prevention and a varistor Z1 for surge protection are connected in parallel, and a common mode choke coil L1 is connected in series. Further, a noise preventing second capacitor C2 connected in parallel is connected between the output terminals of the choke coil L1. A full-wave rectifier circuit 22 is connected in series to the filter circuit 21.

A smoothing circuit 23 is connected to the full-wave rectifying circuit 22. This smoothing circuit 23 is located between the output terminals of the full-wave rectifier circuit 22, and has a third capacitor C3 for noise prevention, a varistor Z2 for surge protection, a resistor R1, and a charging capacitor C4 connected in parallel. Has been done.

Further, an inverter circuit 24 is connected to the smoothing circuit 23. The inverter circuit 24 is located between both terminals of the charging capacitor C4 of the smoothing circuit 23, and is connected to the primary winding Tr1 of the inverter transformer Tr and the transistor.
A series circuit of Q1 is connected, a capacitor C5 is connected in parallel to the primary winding Tr1, and a feedback diode D1 is connected between the collector and emitter of the transistor Q1. Further, a separately-excited drive circuit 25 that induces a high-frequency voltage in the secondary winding Tr2 of the inverter transformer Tr is connected between the base and collector of the transistor Q1.

The secondary winding Tr of the inverter transformer Tr
The filament FL1a of one discharge lamp FL1 is connected to one terminal of this secondary winding Tr2 via a resistor R2 and a capacitor C6 connected in parallel to this resistor R2. The discharge lamp FL2 is connected to the other terminal of the wire Tr2.
The filament FL2b of is connected. The filament FL1b of one discharge lamp FL1 and the other discharge lamp FL1
FL2 filament FL2a is connected.

Further, the discharge lamps FL1 and FL2 are
The filament FL1a of one discharge lamp FL1 is connected to the filament winding Tr3 of the inverter transformer Tr, and the filament FL1b of the discharge lamp FL1 is connected to the filament winding Tr4 of the inverter transformer Tr. And this filament winding Tr4 has the other discharge lamp
The filament FL2a of FL2 is connected to this discharge lamp.
The filament FL2b of FL2 is connected to the filament winding Tr5 of the inverter transformer Tr.

A starting capacitor C7 is connected between the filaments FL1a and FL1b of the one discharge lamp FL1.

Next, the operation of the circuit shown in FIG. 2 will be described with reference to FIG.

First, when the power is turned on, the filter circuit
The AC voltage noise is removed at 21, the full-wave rectification circuit 22 performs full-wave rectification, and the smoothing circuit 23 smoothes it. Further, the voltage smoothed by the smoothing circuit 23 is controlled by the drive circuit 25 at high frequency switching of the transistor Q1 and the resonance of the inductance of the primary winding Tr1 of the inverter transformer Tr and the capacitance of the capacitor C5 causes the secondary winding. High frequency AC voltage is induced in Tr2. And
Inverter transformer Tr filament winding Tr3, Tr4,
Each filament of each discharge lamp FL1, FL2 by Tr5
The FL1a, FL1b, FL2a, FL2b are preheated, and the discharge lamps FL1, FL2 are started and lit by the voltage generated by the capacitor C7.

According to the embodiment of FIG. 1 above, each electrical element 15
Insulation part 18 of round 17 for fixing the electrode part 16 of
2, the electrode portion 16 is erected and connected to connect the pattern 13,
In order to form a circuit as shown in, if there is a connection failure such as not mounting the electric element 15, the circuit is not formed,
During the automatic process of connecting the electric element 15 to the circuit board 11, by automatically conducting the continuity test of the electric characteristics, it is possible to detect the connection state of the electric element and efficiently and easily without performing a visual inspection. The connection status can be detected. In addition, since it is possible to automatically conduct a continuity test of electrical characteristics,
The connection state can be easily identified without using an expensive detection device such as an image recognition device.

Next, another embodiment will be described with reference to the drawings.

In FIG. 3, reference numeral 11 is a circuit board, and the circuit board 11 is composed of a board 12 made of an insulating material and a pattern 31 electrically wired on the surface of the board 12 by a circuit design.

On the other hand, 32 is an electric component, and this electric component 32
Has lead wires 33 as electrode portions formed at both ends in the longitudinal direction.

Further, the pattern 31 of the circuit board 11 has circular rounds 34 formed at both ends. Further, the round 34 is formed with the insulating portion 18 which is separated by a predetermined insulating distance. Also, in the center of this round 34,
A through hole 35 through which 33 is inserted is formed.

Then, the lead wire 33 is inserted from the rear surface of the circuit board 11 into the through hole 35, and the round 34 into which the lead wire 33 is inserted.
In the round 34 of the pattern 31 facing each other, the lead wire 33 projecting to the surface side of the circuit board 11 is bent and soldered so as to be installed in the insulating portion 18, and the electric component 32 is connected and fixed to form a circuit. To do.

Further, as shown in FIG. 4, for the electric component 32 in which two pairs of the lead wires 33 are formed in one of the electrode portions, the electric component 32 is installed on the insulating portion 18 of the round 34 of the two patterns 31. From the back surface of the circuit board 11,
And the lead wires 33, which are respectively inserted, are soldered to the round 34, and the electric parts 32 are connected and fixed to form a circuit.

Next, still another embodiment will be described with reference to the drawings.

In FIG. 5, reference numeral 11 is a circuit board, and the circuit board 11 is composed of a board 12 made of an insulating material and a pattern 31 electrically wired on both surfaces of the board 12 by a circuit design.

On the other hand, 32 is an electric component, and this electric component 32
Has lead wires 33 as electrode portions formed at both ends in the longitudinal direction.

Further, the pattern 31 of the circuit board 11 has circular rounds 34 formed at both ends, and the patterns are alternated between the front surface and the back surface so that the front surface round 34 and the back surface round 34 are located at the same position. Is formed in. In addition, round
A through hole 35, through which the lead wire 33 is inserted, is formed substantially in the center of the 34 so that the front round 34 and the back round 34 are inserted.

Then, the lead wire 33 is inserted into the through hole 35 from the back surface of the circuit board 11, and the inserted lead wire 33 is soldered to the rounds 34 on both sides as shown in FIG.
Is connected and fixed to form a circuit.

In the embodiments shown in FIGS. 1 to 6, the circuit of the luminaire shown in FIG. 2 has been described, but any circuit can be used.

[0037]

According to the circuit board of the present invention, the electrode portion is erected and connected electrically to the round insulating portion for electrically and mechanically connecting and fixing the electrode portion of the electric component to electrically connect the pattern. In order to form a circuit, a continuity test of electrical characteristics can be automatically performed during the process of connecting electrical components to a circuit board, and the electrical components can be connected efficiently and easily without visual inspection. It is possible to detect, and it is possible to easily identify the connection status of the electric parts without using an expensive detection device.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a circuit board of the present invention.

FIG. 2 is a circuit diagram of the above.

FIG. 3 is an exploded perspective view of another embodiment.

FIG. 4 is an exploded perspective view of still another embodiment.

FIG. 5 is an exploded perspective view of still another embodiment.

FIG. 6 is a cross-sectional view near the round shown in FIG.

FIG. 7 is an exploded perspective view showing an example of a conventional circuit board.

[Explanation of symbols]

 11 Circuit board 13, 31 Pattern 15 Surface mount electrical element as an electrical component 16 Electrode part 17, 34 Round 18 Insulation part 32 Electrical component 33 Lead wire as electrode part

Claims (1)

[Claims] 1. A circuit board provided with a pattern having rounds for electrically and mechanically connecting and fixing electrode parts of an electric component, wherein the rounds are formed electrically separated from each other by an insulating part. A circuit board, characterized in that a circuit is formed by erection and electrical connection of the electrode portion on an insulating portion.