SU902333A1

SU902333A1 - Printed circuit board testing device

Info

Publication number: SU902333A1
Application number: SU792828073A
Authority: SU
Inventors: Равиль Рахматуллович Хисматулин; Марат Александрович Егоров; Галина Алексеевна Маликова; Борис Васильевич Тиньков
Original assignee: Предприятие П/Я В-2431
Priority date: 1979-10-18
Filing date: 1979-10-18
Publication date: 1982-01-30

Description

Изобретение относится к радиотехнике и может быть использовано в устройствах контроля при производстве печатных плат.The invention relates to radio engineering and can be used in control devices in the manufacture of printed circuit boards.

Известны устройства для контроля с неподвижными направляющими и подвиж- ⁵ные контактные модули, в виде съемных скоб, выполненных с возможностью радиального или осевого перемещения, на которых закреплены подпружиненные контакты и элементы фиксации. ^,0 There are known devices for monitoring with fixed guides and movable ⁵ contact modules, in the form of removable brackets made with the possibility of radial or axial movement, on which spring-loaded contacts and fixing elements are fixed. ⁰

Эти устройства позволяют контролировать печатные платы различных типоразмеров, при этом набор контактного поля осуществляется съемом с отклю- ^,sчением при помощи разъема или поворотом без отключения подвижных, контактных модулей f<УThese devices allow the control circuit boards of different sizes, wherein the set of readout contact pattern is performed with TURNED ^{OFF, s} cheniem using connectors or without turning off the movable, contact modules f <V

Однако при малом шаге между контактами данные устройства не обеспе- ^ичивают надежного контактирования изза сложного выполнения элементов фиксации .However, when a small step between these devices ^{and the} contacts not Collateral Chiva reliable contact because of the complex elements of the commit.

Наиболее близким к предлагаемому является устройство для контроля печатных плат, содержащее основание с неподвижными направляющими, на которых закреплены при помощи элементов фиксации в виде подпружиненных штырей и фиксирующих отверстий' подвижные направляющие с размещенными на них контактными модулями, подпружиненные контакты.которых соединены с измерительным блоком f 2].Closest to the proposed is a device for monitoring printed circuit boards, containing a base with fixed guides, on which are fixed using fixing elements in the form of spring-loaded pins and fixing holes' movable guides with contact modules placed on them, spring-loaded contacts, which are connected to the measuring unit f 2].

Однако при настройке указанного устройства необходимо снимать либо подвижные направляющие с модулями, либо модули с подвижных направляющих и устанавливать взамен их . требуемые по технологии контролируемой печатной платы. Для этого необходимо отключить модули от измерив тельного блока, на что требуется зна* чительное время, так как число контактируемых точек на плате достигает 4000-5000. Кроме того, фиксация подвижных направляющих осуществляет^ .ся с помощью подпружиненных штырей, которые западают в отверстия, выполненные на неподвижных направляющих с шагом координатной сетки. Обеспечить надежную фиксацию подвижных направляющих, от которой зависит надежность контактирования с отверстиями печатных плат, с шагом координатной сетки плат равным 1,25 мм практически невозможно, так как фиксирующие отверстия на неподвижных направляющих должны располагаться на расстоянии равном 1,25 мм друг от друга.However, when configuring the specified device, it is necessary to remove either the movable rails with the modules, or the modules from the movable rails and install them instead. required by technology controlled PCB. To do this, it is necessary to disconnect the modules from the measuring unit, which takes a considerable time, since the number of contact points on the board reaches 4000-5000. In addition, the fixing of the movable guides is carried out using spring-loaded pins, which fall into the holes made on the fixed guides with a step of the coordinate grid. It is practically impossible to ensure reliable fixation of the movable guides, on which the reliability of contacting with the holes of the printed circuit boards depends, with the grid spacing of the boards equal to 1.25 mm, since the fixing holes on the fixed guides should be located at a distance of 1.25 mm from each other.

Цель изобретения - повышение надежности контактирования.The purpose of the invention is to increase the reliability of contacting.

Указанная цель достигается тем, что в устройстве контроля печатных плат, содержащем основание с неподвижными и подвижными направляющими, кон-'' тактные модули с подпружиненными контактами, соединенными с измерительным блоком, элементы фиксации в виде отверстий, выполненных в направляющих с шагом, кратным шагу координатной сетки, и фиксаторов, количество отверстий в каждом ряду подвижной направляющей равно п, при этом отверстия в неподвижных направляющих выполнены с шагом A = n’S, а в подвижных направляющих - с шагом Б =(n+1)'S, где S - шаг координатной сетки контролируемой печатной платы, ап- любое число из натурального ряда чисел.This goal is achieved by the fact that in the control device of the printed circuit boards containing the base with fixed and movable guides, contact modules with spring-loaded contacts connected to the measuring unit, fixing elements in the form of holes made in the guides with a step that is a multiple of the coordinate step mesh, and latches, the number of holes in each row of the movable guide is n, while the holes in the fixed guides are made with a step A = n'S, and in the movable guides with a step B = (n + 1) 'S, where S is the coordinate step nnnoy grid controlled PCB, ap - any number from a natural series of numbers.

На фиг. 1 показано устройство, общий вид в разрезе; на фиг. 2 вид в плане; на фиг. 3 “ расположение отверстий в направляющих.In FIG. 1 shows a device, a General view in section; in FIG. 2 view in plan; in FIG. 3 “arrangement of openings in guides.

Устройство плат содержит нии 1 неподвижные 2 направляющие прямоугольного профиля, и подвижные 3 направляющие, на которых закреплены контактные модули 4 с подпружиненными контактами, соединенными с тельным блоком. В основании 1 полнено окно 5· На плоскостях правляющих 2 нанесены шкалы 7 лениями, ординатной сетки контролируемой чатной платы S, например, 1,25 для контроля печатных закрепленные на основаизмеривы6 с расположенными с шагом надекопемм.The circuit board device comprises 1 fixed 2 guides of a rectangular profile, and movable 3 guides on which contact modules 4 are mounted with spring-loaded contacts connected to the body block. At the base 1, a window 5 is filled. On the planes of the governing 2, scales are plotted with 7 lines, the ordinate grid of the controlled chat board S, for example, 1.25 for control of printed boards fixed to the base, measured 6 with nadkopemki arranged in increments.

В направляющих 2 выполнены отверстия 8 для фиксации с шагом A = n'S, где S - шаг координатной сетки контролируемой печатной платы, η - любое число из натурального ряда чисел, например, с шагом 3,75 мм равным (3-х 1,25 мм).In the guides 2, holes 8 are made for fixing with a step A = n'S, where S is the coordinate grid pitch of the controlled printed circuit board, η is any number from a natural number series, for example, with a 3.75 mm pitch equal to (3 x 1.25 mm )

Концы каждой подвижной направляющей 3, входящие в направляющие 2, выполнены по радиусу, достаточному для поворота ее вокруг оси 9 и извлечения ее из направляющих 2. На каждой направляющей нанесены по две риски 10 и выполнены по два ряда отверстий 11, количество которых равно п, и расположенных в ряду с шагом Б = (n+1)'S, т.е. равным 5 мм. Фиксаторы в виде пальцев 12 установлены в отверстия 11 направляющих 3 и отверстия 8 направляющих 2 и служат для фиксации направляющих 3. при наборе контактного поля. Снизу к основанию 1 привернуты два кронштейна 13. накопителя, в пазы которых укладываются неиспользуемые при наборе контактного поля направляющие 3 с контактными модулями, сверху установлен механизм 14 прижима с диэлектрической плитой 15· Основание установлено -на каркас 16.The ends of each movable guide 3 included in the guides 2 are made in a radius sufficient to rotate it around the axis 9 and remove it from the guides 2. Two risks 10 are applied to each guide and two rows of holes 11 are made, the number of which is equal to n, and located in a row with the step B = (n + 1) 'S, i.e. equal to 5 mm. The latches in the form of fingers 12 are installed in the holes 11 of the guides 3 and the holes 8 of the guides 2 and are used to fix the guides 3. when dialing the contact field. Two brackets 13 of the drive are screwed from below to the base 1, into the slots of which guides 3 with contact modules that are not used when entering the contact field are stacked, a clamp mechanism 14 with a dielectric plate 15 is installed on top; The base is installed on the frame 16.

I Расположение отверстий 11 в ряда>< ; направляющих 3 и отверстий 8 в направ^: ляющих 2 с шагами, равными соответственно 5 и 3,75 мм, отличающимися друг от друга на-величину S= 1,25 мм, позволяет фиксировать направляющие .3 с ί шагом равным 1,25 мм пальцами 12, выполненными с диаметром равным 3 мм, достаточным для надежного фиксирования.I Arrangement of holes 11 in a row><; guides 3 and holes 8 in the guides ^: 2 with steps equal to 5 and 3.75 mm respectively, differing by an amount S = 1.25 mm, allows you to fix the guides .3 with ί pitch equal to 1.25 mm with your fingers 12, made with a diameter equal to 3 mm, sufficient for reliable fixation.

Наличие шкал с делениями 7 на плос_3J костях 6 направляющих 2 и рисок 10 на направляющих 3 упрощает процесс набора контактного поля при настройке устройства.The presence of scales with divisions 7 on the plane _3J bones 6 guides 2 and Fig. 10 on the guides 3 simplifies the process of dialing the contact field when setting up the device.

Настройку устройства, заключающуюся в наборе контактного поля, соответствующего подлежащий контролю печатным платам, выполняют следующим образом.The configuration of the device, which consists in a set of contact fields corresponding to the circuit boards to be controlled, is performed as follows.

Извлекают пальцы 12, раздвигают направляющие 3 в направляющих 2, поворачивают неиспользуемые для набора направляющие 3 вокруг оси 9, извлекают их без отключения от измерительного блока из направляющих 2, опускают через окно 5 основания 1 и укладывают в пазы кронштейнов 13 накопителя. ·The fingers 12 are removed, the guides 3 are moved apart in the guides 2, the guides 3 used for the set are rotated around the axis 9, they are removed without disconnecting from the measuring unit from the guides 2, they are lowered through the window 5 of the base 1 and laid in the slots of the drive brackets 13. ·

Необходимые для набора контактного поля направляющие 3 вынимают из пазов кронштейнов 13 накопителя и устанавливают в направляющие 2. После этого находят подлежащей контролю печатной платы положение направляющих 3 по шка55 ле с делениями 7 и фиксируют их пальцами 12. Устройство подготовлено к контролю печатных плат.The guides 3 needed to set the contact field are removed from the slots of the brackets 13 of the drive and installed in the guides 2. After that, the position of the guides 3 on the scale 55 with divisions 7 is found to be controlled by the printed circuit board and fixed with fingers 12. The device is prepared for control of printed circuit boards.

Для выполнения контроля печатную плату укладывают на контактное поле, прижимают диэлектрической плитой 15 прижимного механизма 14 к контактным модулям 4, совмещенным с отверстиями печатной платы, и включают измерительный блок. 10 (1ри перестройке контактного поля .фиксацию направляющих 3 осуществляют, перемещая их на шаг координатной сетки и совмещая при помощи пальцев 12 фиксатора последовательно каждое от- 15 верстие неподвижной и подвижной направляющих^To perform the control, the printed circuit board is placed on the contact field, pressed by the dielectric plate 15 of the pressing mechanism 14 to the contact modules 4, combined with the holes of the printed circuit board, and include a measuring unit. 10 (1 during the reconstruction of the contact field. The guides 3 are fixed by moving them to the coordinate grid step and combining each of the 15 fixed and movable guides with the fingers 12 of the retainer sequentially ^

Claims

(5) DEVICE FOR CONTROL OF PRINTING BOARDS The invention relates to radio engineering and can be used in. control devices in the manufacture of printed circuit boards. Control devices with fixed guides and movable contact modules, in the form of removable brackets made with the possibility of radial or axial movement, on which spring-loaded contacts and fixing elements are fixed, are known. These devices allow control of printed circuit boards of various sizes, while the set of the contact field is carried out by removing or disconnecting by means of a connector or by turning it without disconnecting the moving, contact modules f I. However, with a small pitch between the contacts, these devices do not provide reliable contact due to the complicated implementation of ficking elements. Closest to the present invention is a device for testing printed circuit boards, comprising a base with fixed guides, on which are fixed with fixing elements in the form of spring-loaded pins and fixing holes, movable loading guides with contact modules placed on them, spring-loaded contacts which are connected with the measuring unit 2. However, when setting up the specified device, it is necessary to remove either the movable guides with the modules or the modules with the movable guides and install en they controlled PCB required by technology. To do this, it is necessary to disconnect the modules from the measuring unit, for which a considerable time is required, since the number of contact points on the board reaches 000-5000. In addition, the fixing 39 of the movable guides makes with spring-loaded pins that sink into the holes made on the fixed guides with a grid spacing. It is practically impossible to ensure reliable fixing of movable guides, on which the reliability of contact with the holes of printed circuit boards depends, with the grid coordinate grid spacing equal to 1.25 mm, since the fixing holes on the fixed guides should be 1.25 mm apart. from friend. The purpose of the invention is to increase the reliability of contact. This goal is achieved by the fact that in a control device of printed circuit boards containing a base with fixed and movable guides, contact modules with spring-loaded contacts connected to the measuring unit, fixing elements are in the form of holes made in guides with a step that is a multiple of the grid step , and clamps, the number of holes in each row of the movable guide is equal to n, while the holes in the fixed guides are made with step A nS, and in the MOBILE guides - with step B (n + 1) S where S is the coordinate step grid of the controlled printed circuit board, an is a number from the natural number of numbers. In FIG. 1 shows the device, a general view in section; in fig. 2 plan view; in fig. 3 arrangement of the holes in the guides. The device for control of printed circuit boards contains fixed on the basis of NII 1 fixed 2 rectangular profile guides, and movable 3 guides on which contact modules C are fixed with spring-loaded contacts connected to the measuring unit. In the base 1, a window 5 is made. On the planes 6 of the guides 2 there are scales 7 with divisions arranged with a grid spacing of the controlled printed circuit board S, for example, 1.25 mm. Holes 8 are made in guides 2 for fixing with a spacing A nS, where S is the grid spacing of the controlled printed circuit board, and n is any number of natural numbers, for example, with a mm spacing equal to (3 x 1.25 mm). 3 The ends of each movable guide 3, included in the guides 2, are made along a radius sufficient to rotate it around the axis 9 and remove it from the guides 2. On (each guide has two risks 10 and two rows holes 11, the number of which is equal to n, and located in a row with a pitch B (n + l) S, i.e. equal to 5 mm. Fingers-shaped delocators 12 are installed in the holes 11 of the guides 3 and the holes 8 of the guides 2 and they are used to fix the guides 3. when typing the contact field. Two brackets 13 are screwed down to the base 1. accumulation ere, in the grooves of which there are guides 3 with contact modules that are not used when recruiting a contact field, a clamping mechanism H with a dielectric plate 15 is installed on top. The base is mounted on the frame 1b. I Arrangement of holes 11 in a row of guides 3 and holes 8 2 with steps equal to 5 and mm, respectively, differing from each other by a value of S 1.25 mm, allows fixing guides .3 with a step equal to 1.25 mm with fingers 12, made with a diameter equal to 3 mm. sufficient for reliable fixation. The presence of scales with divisions 7 into planes 6 of guides 2 and risok 10 on guides 3 simplifies the recruitment of a contact field when setting up the device. Neither: the device triple, consisting in a set of a contact field corresponding to the printed circuit boards to be monitored, is performed as follows. The pins 12 are removed, the guides 3 are moved apart in the guides 2, the guides 3 which are not used for the set are turned around the axis 9, they are removed from the measuring unit from the guides 2 without being disconnected from the gauge 2, and lowered into the slots of the arms 13 of the hopper. ° The guides 3 necessary for the set of the contact field are taken out of the slots of the arms 13 of the accumulator and placed in the guides 2. After this, the position of the guides 3 to be checked by the printed circuit board is on a scale with divisions 7 and fixed with their fingers 12. The device is prepared for control printed circuit boards. In order to perform the control, the printed circuit board is placed on the contact field, pressed by the dielectric plate 15 of the pressing mechanism It to the contact modules C aligned with the holes of the printed circuit board, and the measuring unit is turned on. When reconstructing the contact field, the fixing of the guides 3 is carried out by moving them to the grid step and aligning each hole of the fixed and movable guides with the help of the fingers 12 of the fixture. I Formula of the invention A device for controlling printed circuit boards containing a base with fixed and movable guides them, contact modules with spring-loaded contacts connected to the metering unit, Oxyx elements in the form of holes made in the guide | with a step that is a multiple of the coordinate with In order to increase the reliability of contact, the number of holes in each row of the moving guide is equal to n, while the holes in the fixed guide are made with pitch A p5, and in the moving guide with pitch B ( n + 1) S, where S is the step of the grid controlled by the printed circuit board, and n is any number of natural numbers and numbers. Sources of information taken into account in the examination 1. USSR author's certificate number, cl. H 05 K I / O, 1978.

2. USSR author's certificate K 7U666, cl. H 05 K 1/04, 1977 (prototype).