SU1302447A1 - Contact device for checking printed-circuit board - Google Patents

Abstract

The invention relates to the field of electronics and can be used for automated control of electrical parameters of printed circuit boards. The purpose of the invention is upJ / J2 JO 28 Section N2 Section N3 Section N t JL growth of the device. The device includes an electromagnet (E) 28, contact sockets (CG) 1-20, made in the dielectric base 21 and connected to the instrumentation equipment 23. The contact elements (EC) 27 are placed in the conductive liquid 26. The goal is achieved due to the fact that the E 28 is made in the form of several sections that can be switched on independently of each other. At the same time, CGs are combined into groups that can interact with sections E28.Furthermore, CGs of two groups are connected with instrumentation equipment, and CGs of the other groups are connected with CIs of the first two groups. 3 il. ,, „СЛ and N3 Section N t JL У, 22 2725 FIG. one

Description

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The invention relates to radio-: electronics and can be used for automated control of electrical parameters of printed circuit boards.

The aim of the invention is to simplify the device.

FIG. 1 shows a contact device for monitoring boards, a slit; FIG. 2, a contact with the electromagnet turned off; on fig.Z - interaction of contact with the included electromagnet.

The contact device for control of the boards contains contact sockets 1-20 in the dielectric base 21 installed in the housing 22. The contact sockets 1-20 are connected to the terminals for connection to KIA 23 by switching wires 24. The contact sockets 1-20 are made in in the form of glasses with metallized walls 25 by soldering commuting wires 24, filled with a conductive liquid 26, into which mobile magnetosensitive contact elements 27 are placed. Electromagnet 28 is shown made of 4 included

Mo from each other sections (section number 1 - zo Dam 1-16 relative to each other. Section number 4). In order to enhance the impact, sections # 1 and 3 of the electromagnet of the electromagnet are turned on the contact elements and prevention of the working effect of the sections on the contact elements of other groups. The electromagnet 28 can be equipped with magnetic field concentrators 29 placed at the center of the grid of the coordinate grid, respectively.

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This, thereby connecting the groups of contact sockets 1-4, 9-12 by lifting the moving magnetically sensitive contact elements 27 with a magnetic field, and monitoring the connected conductors. Then disconnect section number 3, disconnecting these contact sockets 9-12, movable magnetochestrastrenzemlenii contacts. Electromagnet

28 is placed in a cap 30, which supply elements of which are lowered by retainers 31 for installation with under the action of its own weight,

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the tested board 32 with the conductors 33. The cover 30 and the base 21 are installed in the device with the possibility of their relative movement. The dotted line shows the possible position of the cover 30 with the electromagnet 28 and the board. 32 (figure 1). In addition, the cap is pivotally mounted relative to the base 21 for installation in the device of the test board. Figure 1 shows the included sections No. 1 and 3 of the electromagnet 28, which connected the groups of contact jacks 1-4 and 9-12 that they control to conductors 33 of the board 32. Section 2 and 4 are turned off and the groups of contact elements 5-8 and 13 -16, which they control, are not connected to the board. Foundation 21

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50

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and include section no. 4, connecting a group of pin sockets 13–16, and monitoring the connected conductors. The test is then carried out with sections No. 2 and 3 turned on (i.e. the connected jacks 5-8 and 9-12) and sections No. 2 and 4 turned on (contact jacks 5-8 and 13-16). To control the conductors corresponding to the groups of connected HKfx contact. slots 1-4 and 5-8 "9-12 and 13-16, the plate 32 with the cover 30 and the electromagnet 28 is moved relative to the base 21 to the position indicated by the dotted line, the length of one section of the electromagnet and check these conductors, including section No. 1 and 2 (connect a group of contact sockets 5-8 and

is made longer than the tested board 32 for the length of one section of the electromagnet 28, where the contact sockets 17-20 are placed. To KIA are connected by switching wires pin jacks 1-4, 13-16. The contact sockets of the other groups are connected to the contact sockets of one of the first two groups. So, the group of contact sockets 5-8 and 17-20 is connected to the contact sockets 1-4, and the group of contact sockets 9-12 to the contact sockets 13-16. Only one contact element from the group of contact elements controlled by one electromagnet section is connected to each electrical circuit of the contact socket connection, for example, in the electrical circuit of the contact socket connection 1, 5, 17 there are no two contact jacks from the same group.

Contact device operates as follows.

The tested board 32 is installed on the latches 31, lowered to the base 21. Suppose that in the board 32 it is necessary to check all the conductors 33 of the board, installed properly according to the contact socket Dam 1-16 relative to each other. Include sections number 1 and 3 electromagnet

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This, thereby connecting the groups of contact sockets 1-4, 9-12 by lifting the moving magnetically sensitive contact elements 27 with a magnetic field, and monitoring the connected conductors. Then disconnect section 3, disconnecting these sockets 9-12, movable magnetovevst5

0

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and include section no. 4, connecting a group of pin sockets 13-16, and monitoring the connected conductors. The test is then carried out with sections No. 2 and 3 turned on (i.e. the connected jacks 5-8 and 9-12) and sections No. 2 and 4 turned on (contact jacks 5-8 and 13-16). To control the conductors corresponding to the groups of connected HKfx contact. slots 1-4 and 5-8 "9-12 and 13-16, the plate 32 with the cover 30 and the electromagnet 28 is moved relative to the base 21 to the position indicated by the dotted line, the length of one section of the electromagnet and these conductors are inspected, including section No. 1 and 2 (connect a group of contact sockets 5-8 and

31302447

12) and sections No. 3 and 4 (connecting group contact slots 13-16 and 17-20).

lt r n us e to n

To control the boards with the number of connected points N, with n sections of the electromagnet, the number of movements

p-1

boards A (. if n is an odd number) or A y - 1 (if n is even

number). At the same time, the number of commuting wires to, connected to KIA, is equal to 2N but К -.

For the given example, the number of test points of the board 32 is 16, the number of sections of the electromagnet is 28,

“. P . four . displacement number 1 - The number of commuting wires K,

 eight.

2N connected to KIA, K -

2-16

Claims (1)

Claims of the invention A contacting device for monitoring printed circuit boards, comprising a dielectric base with contact sockets in which movable magnetic sensitive elements are placed, and an electromagnet, the contacts being connected to terminals for connecting to measuring equipment 10, which is simplified for simplicity. device, the electromagnet is made in the form of sections with the possibility of independent inclusion of each of them, and J5 contact sockets are combined into independent groups that are installed with the ability to interact with sections of an electromagnet, and the contact sockets of two independent groups are connected to terminals for connection to instrumentation, and all the contact sockets of each of the other independent groups are connected to the corresponding contact sockets of one of the first two groups. 25 Z4 1ЁZg tfuz .Z Editor L. Langazo Compiled by V. Max Chkin Tehred L.Oleingas Proofreader M. Pojo Order 1225/56 Circulation 802 Subscription VNIIPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Fig.Z