JPH0718472U - Printed circuit board with check terminals - Google Patents

Abstract

(57) [Summary] [Purpose] The contact pin and the pattern are connected from the side opposite to the pattern side of the single-sided printed circuit board. [Structure] The metal plate 3 is the pattern 2 of the single-sided printed circuit board 1.
The contact pin 4 is electrically connected to the upper side by the solder 5, and the contact pin 4 passes through the hole 1a and the metal plate 3 on the pattern surface.
You can connect with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printed circuit board having a check terminal for connecting a contact pin for measurement from the side opposite to the pattern surface.

[0002]

[Prior art]

 Conventionally, contact pins have been used to efficiently carry out the work when connecting to a printed circuit board to check the continuity of the printed circuit board and make electrical adjustments in the product state. Therefore, a land for connecting to a contact pin is usually provided as a check land on the printed circuit board. It is possible to provide check lands on either side of a double-sided printed circuit board, but in the case of a single-sided printed circuit board, check lands can be provided only on the side where the pattern is formed. . However, there are cases where it is required to connect the contact pins from the side opposite to the pattern due to the restrictions imposed by the product structure. In this case, check lands must be provided on the side opposite to the pattern. Therefore, a check land is provided on the surface opposite to the pattern surface by forming a double-sided printed circuit board using through holes.

[0003]

[Problems to be solved by the device]

 In the conventional technology, even a printed circuit board that has a single-sided pattern as a circuit is a double-sided printed circuit board using a through hole and a check land is provided on the side opposite to the pattern surface. However, using a double-sided printed circuit board by using a through hole only to provide a check land has caused a cost increase. The purpose of the present invention is to minimize the cost increase without using through holes.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention forms a part of a pattern with a rigid conductor and forms a hole in the printed circuit board so that the part of the conductor is covered, so that the contact pin is It becomes possible to connect to the conductor through the hole from the side opposite to the pattern surface, thus eliminating the need for using a through hole. Moreover, the cost can be suppressed by using the lead part of the mounted component or the jumper bar as the conductor.

[0005]

【Example】

 FIG. 1 shows an embodiment of the present invention. The metal plate 3 is electrically connected to the pattern 2 of the single-sided printed circuit board 1 by solder 5 and constitutes a part of the check terminal of the circuit pattern. The printed circuit board 1 is formed with a hole 1a which is covered with the metal plate 3. Here, when connecting from the side opposite to the check terminal on the pattern surface of the printed board by the contact pin 4, the contact pin 4 can be connected to the metal plate 3 on the pattern surface by passing through the hole 1a. FIG. 2 shows another embodiment. The lead portion 6a of the resistor 6 is fixed by the solder 5, and the hole 1a is provided in the printed board 1 so that the lead portion 6a can be seen. Also in this case, it is possible to connect to the lead portion 6a by the contact pin 7 from the side opposite to the check terminal on the pattern surface. Further, here, by forming the contact pin 7 into a shape having a flat portion as shown in FIG. 3, even a thin wire such as a lead of an element can be surely connected. FIG. 4 shows another embodiment. The IC 8 is mounted on the pattern surface 2, and the contact pin 7 can be connected to the check terminal on the pattern surface in the same manner as above by forming the hole 1a so that a part of the lead portion 8a is covered. FIG. 5 shows another embodiment in which the jumper bar 9 is used as the conductor.

[0006]

[Effect of device]

 Due to the structure of the product, even when connecting with the contact pin from the side opposite to the check terminal on the pattern side of the single-sided printed circuit board, it is possible to use the contact pin as it is on the single-sided printed circuit board without using the through hole. The cost of the board can be kept low.

[Brief description of drawings]

FIG. 1 is a sectional view of a check land showing an embodiment of the present invention.

FIG. 2 is a sectional view of a checkland showing another embodiment of the present invention.

FIG. 3 is a shape view of a contact pin showing another embodiment of the present invention.

FIG. 4 is a sectional view of a checkland showing another embodiment of the present invention.

FIG. 5 is a sectional view of a checkland showing another embodiment of the present invention.

FIG. 6 is a sectional view of a through hole showing a conventional example.

[Explanation of symbols]

 1 Printed board 1a Hole 2 Pattern 3 Metal plate 4, 7 Contact pin 6 Resistance 6a Resistance lead part 8 IC 8a IC lead part 9 Jumper bar

Claims (1)

[Scope of utility model registration request] 1. A pattern formed on only one side, a conductor soldered to a check terminal of the pattern, and a hole for inserting a terminal pin in contact with the conductor are formed. Printed circuit board with check terminals.