JPS611084A - Printed 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 Industrial Application The present invention relates to a printed circuit board on which electronic components such as transistors are mounted.

Conventional Structures and Problems There has been a rapid increase in the number of products with electronic control functions in recent years, and a large number of printed circuit boards are equipped with electronic components such as transistors.

FIG. 1 is a diagram showing the appearance and configuration of the transistor Q1. E indicates the emitter, B the base, and C the collector. When a voltage vBK is applied between the base B and the emitter E, a current flows from the collector C to the vine E. FIG. 2 is an example of a control circuit used for transistor Q1'.

When IC1 (for example, a microcomputer) controls a load RL (for example, a relay load), IC1
output terminal 0φeHigh (i.e., vout =
vss), the current flow, the base potential V8>OV, the transistor Q1 turns on, and the collector current flows. can be driven by the load RL k. Here, the resistance R1 is k
The resistor R2, which is a resistor to be controlled and has a value of -1, has a base potential V
Since B is not affected by noise or the like, it is a pre-down resistor that always maintains OV when the output signal Oφ is not output. In a normal transistor circuit, R1, R
2 is essential. FIG. 3 shows a pattern diagram when the control circuit of FIG. 2 is provided on a printed circuit board. The output terminal Oφ (ie, 5th pin) of the transistor C1 is connected to one end of the resistor R1, and the other end of R1 is connected to the base B of the transistor Q1 and one end of the resistor R2.

Further, the emitter E of the transistor Q1 is connected to the other end of the resistor R2 and Ov, and the collector C is connected to the load RL
and is connected to form a control circuit.

Recently, a transistor Q2 with a built-in resistor as shown in FIG. 4 has been put into practical use. By providing this inside the resistors R1 and R2'i transistors mentioned above, the control circuit becomes extremely simple as shown in FIG. 5, and the pattern on the printed circuit board is also as shown in FIG. It became easy. 1. The number of parts has been reduced, which has reduced costs and man-hours. Figure 7,
Figure 8 shows the P board mounting diagram of the control circuit when a normal transistor Q1 and a transistor with built-in resistor Q2''lf are used.When using the transistor with built-in resistor Q2, the space can be reduced and the printed circuit board can be used effectively. Now available.

However, in recent years, with the large increase in demand for electronic components such as transistors, it has become impossible to secure a stable supply of transistors with built-in resistors Q2 and regular transistors Q1. In order to be able to use Q1, large-scale changes to the printed circuit board are required, which is a very big problem.

However, if the current required for the load current (i.e. collector current) changes, the printed circuit board will also need to be changed when changing the circuit from the transistor Q2 with a built-in resistor, which has a low allowable current, to the normal transistor Q1. , which causes a large loss in design.

Furthermore, if a transistor with a built-in resistor and a normal transistor are mistakenly inserted during the production stage, they must be replaced, resulting in a large manufacturing loss.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems of the conventional art, and allows the common use of ordinary transistors and transistors with built-in resistors, making it possible to cope with today's difficult supply of electronic components. Furthermore, even in the event of incorrect insertion, the printed circuit board can minimize manufacturing losses.

Structure of the Invention In order to achieve all the above objects, the printed circuit board of the present invention has a hole for a transistor, a first hole for an automatically inserted component, and a second hole for an automatically inserted component, and the printed circuit board has a hole for a transistor, a first hole for an automatically inserted component, and a second hole for an automatically inserted component. A normal transistor, a first resistor inserted in the first hole, and a second resistor inserted in the second hole, a transistor with a built-in resistor in the transistor hole, and a jumper wire in the first hole. , the second hole is patterned so as to have the same performance as the one in which the second hole is not inserted, and a normal transistor and a transistor with a built-in resistor can be used in common, making it possible to cope with today's difficult supply of electronic components. Further, it has the effect of being able to quickly respond to changes in design such as changes in load current, and minimizing manufacturing loss even in the event of incorrect insertion or the like.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

9A and 9B show the external appearance and circuit of the transistor with a built-in resistor, and FIG. 9C is a configuration diagram of the control circuit. FIG. 10 is a pattern diagram of the printed circuit board of this embodiment, and FIG. 11 is a road map diagram of the component side of the printed circuit board of this embodiment. Connect the output terminal 0φ of IC1 to one end of the automatic insertion component hole JPR1, which is the first hole, and connect the other end of JPRl to the transistor hole B and one end of the automatic insertion component hole JPR2, which is the second hole. Furthermore, the other end of JPR2 is connected to the transistor holes E and OV, and is connected to the transistor hole Of load R5.

Here, JPRl.

JPR2 is a resistor, jumper wire, and diode.

Capacitors etc. can be inserted. Dimensions, transistors, fQ
The I hole is also shared by a normal transistor and a transistor with a built-in resistor. JpRl, JPR2ノO-)" The map diagram has white markings to distinguish it from other markings. Now, when using it as a transistor with a built-in resistor Q2 as shown in FIG. 9A and B,
It may be shown in FIG. 12. Also, as a transistor,
When using a normal transistor Q1, as shown in Fig. 13, a resistor is inserted into the automatic insertion component hole JPR1, and JPR2
All you have to do is insert all the resistors. Therefore, the same printed circuit board can be used in common for a normal transistor and a transistor with a built-in resistor. Even if the current required for the load changes, it can be easily accommodated. Furthermore, even at the manufacturing stage, by marking the road map with white blanks, one operation is greatly improved, and even if an incorrect insertion occurs, it can be dealt with by simply changing JPR1 and JPR2. FIG. 14 is a component mounting diagram in which a normal transistor is mounted on a printed circuit board of the present invention.
FIG. 5 is a component mounting diagram in which a transistor with a built-in resistor is mounted on a printed circuit board according to the present invention. Effects of the Invention As described above, according to the present invention, the following effects are obtained.

(1) On the same front board, a normal transistor'
This makes it possible to share the same transistor with a built-in resistor, making stable production possible in today's world where supply of electronic components is difficult.

(2) Changes in the current required for the load, etc. can now be handled by simply changing the transistors Q1, JpRl, and JPR2, resulting in a dramatic increase in design efficiency.

(3) At the manufacturing stage, it is possible to give caution by marking JPRl and JPR2 with white blanks, which prevents incorrect insertion and makes it easy to make changes in case of incorrect insertion, reducing manufacturing loss. did it.

[Brief explanation of the drawing]

Figure 1 is an external view and configuration diagram of a normal transistor, Figure 2
The figure shows an example of a conventional ordinary transistor circuit, Figure 3 is a pattern diagram of a printed circuit board equipped with a conventional ordinary transistor circuit, Figure 4 is an external view and structure diagram of a transistor with a built-in resistor, and Figure 5 is a conventional conventional transistor circuit with a built-in resistor. Transistor circuit diagram, Figure 6 is a pattern diagram of a printed circuit board equipped with a conventional circuit of a transistor with a built-in resistor, Figure 7 is a component mounting diagram equipped with a conventional normal transistor, and Figure 8 is a conventional transistor with a built-in resistor. 9 is a transistor circuit diagram showing an embodiment of the present invention, FIG. 10 is a pattern diagram of the printed circuit board, and FIG. 11 is a load mag diagram of the component insertion side of the printed circuit board. , Fig. 12 is a circuit diagram of the transistor with a built-in resistor, Fig. 13 is a circuit diagram of the ordinary transistor, Fig. 14 is a component mounting diagram of the ordinary transistor mounted on the same printed circuit board, and Fig. 16 is a circuit diagram of the circuit of the transistor with a built-in resistor. The figure is a component mounting diagram showing all transistors with built-in resistors mounted on the same printed circuit board. JPRl, JPR2... Automatic insertion part hole, R
L...Load, Ql... -Transistor,
CIE...91. Hole for transistor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure (Al (B) Figure 2 Figure 3 Figure 4 (A) (BI Figure 6 Figure 8 Figure 9 Figure tA, (F3) Figure 10 Figure 11 Figure 8314 Figure 15

Claims (2)

[Claims] (1) In a printed circuit board having a hole for a transistor, a first hole for an automatically inserted component, and a second hole for an automatically inserted component, the transistor is placed in the transistor hole, and the first hole is placed in the first hole. A resistor with a built-in resistor in the transistor hole, a jumper wire in the first hole, and a resistor with a built-in resistor inserted in the second hole, and a resistor with a built-in resistor inserted in the transistor hole, a jumper wire in the first hole, and a resistor not inserted in the second hole. A printed circuit board with a pattern configuration that has equivalent performance, and a configuration that allows transistors and transistors with built-in resistors to be shared. (2) The printed circuit board according to claim 1, wherein the first hole for automatically inserted parts and the second hole for automatically inserted parts are marked with white blanks.