JPH0252880B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a method for identifying a printed board when a contact is brought into contact with a predetermined location of a printed board on which electronic components are mounted and a test is performed using a measuring instrument.

(b) Prior art and problems When mounting electronic components on a printed circuit board, first insert the lead terminal piece of the electronic component from the mounting surface into the through hole of the board, and the terminal piece protruding from the through hole has a predetermined length. Cutting is performed. Next, the solder surface is bonded, and the terminal pieces are soldered to the lands of the board. A completed printed circuit board with electronic components mounted thereon is generally checked for abnormalities such as mounting errors in the electronic components or deterioration of characteristics.

This check is carried out using the test apparatus shown in FIG. In FIG. 1, figure a is a configuration diagram and figure b is an explanatory diagram of a printed board testing apparatus.

As shown in FIG. 1a, a table 2 has a board surface 2A on which a printed circuit board 1 on which electronic components 4 are mounted is mounted, and through holes 2B are arranged at a predetermined pitch on the board surface 2A. a driving unit 6 for projecting the contacts 3 that have been inserted, a measuring unit 5 for inputting/outputting a predetermined signal to the attached printed circuit board via the contacts 3, and a measuring unit 5 for projecting the contacts 3 according to the test data 9 and commands from the operation panel 8. and a control section 7 that controls the drive section 6.

The contact 3 is brought into contact with the terminal of the electronic component 4 mounted on the substrate 1 as shown in the explanatory diagram of FIG. 1b. Lead terminal 4A of electronic component 4
is inserted into the through hole 1C of the board 1, and the land 1
D with solder 8, and the solder surface 1B to which the terminal 4A is soldered in this way is connected to the board surface 2A.
is pressed against. Generally, land 1D of board 1
is provided by a predetermined reference pitch, so the pitch P of the contact 3 provided in the through hole 2B is formed to match this reference pitch.

Therefore, the contacts 3, for example, 3-1 and 3-3 located at the terminal 4A to be tested are slid so as to protrude in the direction of arrow A, and by this sliding, the tips of the contacts 3-1 and 3-3 are It is brought into contact with 4A. This allows terminal 4A and contact 3
Since electrical continuity is obtained between contacts 3-1 and 3-3, a characteristic test of electronic component 4 is performed by sending a test signal S between contacts 3-1 and 3-3.

Therefore, the board 1 with the electronic components 4 fixed to the mounting surface 1A is mounted in the direction of the arrow so that the solder surface 1B is in pressure contact with the board surface 2A, and by specifying predetermined test data 9 from the operation panel 8, Test data 9
The contact 3 located at the predetermined terminal 4A to be tested is made to protrude by the
By bringing the terminals 4A into contact with each other and outputting the test signal S from the measuring section 5, a test between the terminals 4A is sequentially performed. Incidentally, such a test signal S is generally used at a minute potential that will not damage the electronic component 4 even if there is a misconnection or the like.

In testing such printed boards, different test data must be used depending on the type of printed board. Therefore, during testing, it was necessary to identify the type of printed board, and this identification was performed as shown in FIG. FIG. 2 is an explanatory diagram showing identification of printed boards in a conventional printed board testing method.

The type of printed board is displayed at a predetermined location 10 on the board 1, and the operator visually identifies the type and inputs the type of printed board using the operation panel 8. Furthermore, a method has been used in which a type is stored in a part of the electronic component 4 mounted on the board 1 and the stored type is read. When reading such a stored type, a power supply section 12 and an identification section 11 are provided, and power is supplied from the power supply section 12 to the terminal 4A of the power supply path of the board 1 via the contact 3, and the identification section 11 receives an output signal through the contact 3 to determine the type of printed board mounted.

The former method requires manpower and has the disadvantage of causing erroneous identification. In addition, in the latter case, power must be supplied to the printed board before testing, and if there is an incorrect connection, the mounted electronic components 4 may be damaged, and the configuration of the printed board may be changed due to modification etc. In this case, there is a problem in that it requires a lot of man-hours to correct the stored type.

(c) Purpose of the Invention The purpose of the present invention is to enable the type of printed circuit board to be determined by contacting a predetermined location of a terminal piece provided on the substrate of a contact plate when testing a printed circuit board, and to solve the above-mentioned problems. The removed version is provided.

(d) Structure of the Invention The object of the present invention is to provide a printed circuit board identification method that includes a terminal group on the solder surface that records the type of the printed circuit board by short-circuiting and opening between predetermined terminals according to a wiring pattern. This is achieved by a printed board identification method characterized in that the type is determined by providing a terminal group and contacting the terminal group with a contact.

(e) Embodiments of the Invention The present invention will be described in detail below with reference to FIG.
FIGS. 3a and 3b are explanatory diagrams showing an embodiment of the printed board testing method according to the present invention.

As shown in FIG. 3a, a plurality of terminals 13 are provided at predetermined locations on the board 1, and during testing, the contacts 3 are brought into contact with each terminal 13, and the electronic component 4 is mounted by the aforementioned measuring section 5. This system is designed to determine the type of printed board that has been printed. Identification of the type using the terminal 13 can be performed by forming it as shown in FIG. 3b. Contacts 3-11~ slid by the aforementioned drive unit 6
Substrate 1 facing 3-1n, 3-21 to 3-2n
A terminal 13 is provided on the land 1D of, for example, a contact 3-1 for a predetermined printed board.
A wiring 14 is connected to the land 1D located at a location where 1 and 3-12 and 3-1n and 3-2n contact each other by pattern wiring or the like so as to obtain electrical continuity as shown by dotted lines. As a result, each contact 3-11 to 3-1n, 3-21 to
3-2n is brought into contact with the terminal 13, and the type can be identified by the measuring section 5 based on the presence or absence of conduction between each contact.

Therefore, if the terminals 13 are connected depending on the type of printed board, the board 1 is mounted on the board surface 2A, and the contacts 3 are first driven by the drive unit 6 and brought into contact with the terminals 13. The type of printed circuit board is identified by the contact measurement unit 5 based on the connection form between each terminal 13. Next, based on this identification, the control section 7 determines the test data 9 to be applied to the printed board.
The test can be executed using the test data 9 by selecting .

When formed in this way, the type of printed board can be identified without supplying power as in the conventional case.

(f) Effects of the Invention As explained above, the present invention connects the plurality of terminals 13 that come into contact with the contacts 3 on the board 1 with predetermined wiring 14 depending on the type of printed board. Contact 3 when testing printed boards
The type of printed board is identified by the measuring section 5 through the .

Thereby, it is not necessary to supply power when identifying a printed board as in the conventional case, and therefore, the mounted electronic components 4 will not be damaged. Furthermore, even if the type of printed board is changed due to modification or the like, this can be easily handled by cutting and connecting the wiring 14 between the terminals 13, which has a great practical effect.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a printed board testing device, Figure b is an explanatory diagram, Figure 2 is an explanatory diagram of a conventional printed board identification method, and Figures a and b of Figure 3 are printed circuit boards according to the present invention. An explanatory diagram of a board identification method is shown. In the figure, 1 is a board, 2 is a table, 3 is a contact, 4 is an electronic component, 5 is a measurement part, 6 is a drive part, 7 is a control part, 8 is an operating table, 9 is test data, 11 is an identification part , 12 is a power supply unit, 13 is a terminal, and 14 is a wiring.

Claims (1)

[Claims] 1. A printed board to which a lead terminal piece of an electronic component passing through a through hole is soldered on a soldering surface, a board surface to which the printed board is attached, and a plurality of contacts arranged at a predetermined pitch opposite to the soldering surface; It includes a drive unit that selects the contact and abuts the terminal piece, and a measurement unit that inputs and outputs a signal through the contact, and the solder surface has wiring patterns that are short-circuited and opened between predetermined terminals. A method for identifying a printed board, characterized in that a group of terminals for recording the type of the printed board is provided, and the type is determined by bringing the contacts into contact with the group of terminals.