SU1429348A2 - Contact device - Google Patents

Abstract

The invention can be used to provide contact in the grid nodes with conductive parts of printed circuits when conducting control and testing of printed circuit boards. The contact device has contacts (K) 1 in the form of elastic rods freely passed through the apertures of the movable and stationary dielectric guides (DN) 2 and 3 and fixed in a dielectric base 4. The stationary DN 3 are made in the form of thin dielectric plates located at equal distances one from the other with holes 5, when passing through which K 1 take the form of a smooth curve o1b, cutting a circle of large radius with a center located, for example, in the plane of a mobile DN 2, or sinusoid segments or n arabols. Between the stationary DN 3 and the base 4 there is a grid 8, which interacts with K I, with which it gives a smooth curved shape in this zone, sufficient for K 1 in this zone to bend under the action of forces that do not go beyond 0, 05- / L 0.1 kgf. The contact device has a reliable contact, 1 Il.

Description

but

11429348

The invention relates to radio; electronics, in particular to devices dp control of printed circuit boards, can be used to ensure contacting at coordinate nodes; natnaya grid with conductive parts of printed circuits during monitoring and testing of printed circuit boards and is an improvement invented ;; shadows on av. 949860; The purpose of the invention is to increase the reliability of contact by optimizing the clamping force. ; The drawing shows a contact ts device, longitudinal section

The contact device contains contacts 1, made in the form of elastic rods, freely passed through holes of the movable 2 and fixed 20 dielectric guides and fixed in the dielectric base 4, B fixed guide 3, executed in the form of thin dielectric. They are placed at 25 equal distances from one another, the holes 5 are located in such a way that when the J contacts pass through them, the latter take the form in this zone, sufficient for the contacts 1 in this zone to bend with the action efforts, without departing from the scope of 0.05 - 0.10 kgf. The grille 8 can be made of a national team, for example, from the slats 9 and rods 10. The grille 8 is fixed to the brackets 11, whose height above the base 4 can be changed by moving the pre-loosened screws installed in the longitudinal slots 13 made in the housing 14 connected to plate 15, above which on the springs 16 with the possibility of vertical movement fixed movable guide 2.

The device works as follows. I

The pre-grid 8 is installed by moving the brackets 11 and the pre-loosened screws 12 along the slits 13 above the base 4 at a distance at which the rod 10 bends the contacts 1 above the base 4 so that their deformation in this area is further

ku smooth curve - cut-30 occurs when exposed to the ends

contacts 1 of the force corresponding to the necessary requirements, for example, lying in the range of 0.50-1.00 N, after that screws 12 are tightened. The test plate 6 is fastened to the moving guide 2, for example by means of a plate J7, for which iff c | and 1, an extra torque force P is applied which moves the board 6 downward until the movable guide 2 is in contact with the 15 ° plate. This end 1 is supported by the free ends of the contact pads of the tested board 6 and is deformed in the area of the lattice 8, displaced by deformable portions between the bars 9 which prevent the possibility of closing a contact: ct 1. friend for friend. Contacts 1 act on the contact pads of the board 6 with contact pressure, which ensures reliable contact, since the required contact pressure is determined by the choice of the distance

This is a large radius with a center located, for example, in the plane of the movable direction 2, or of sinusoidal or parabolic segments. The contacts of contacts 1 with jj contacts of the checked printed circuit board b are made at a right angle, while the distance of the contacts is quite small (for example, 0.625 mm), and the distance between the terminals of contacts is 40 in the base 4, which is podayvayut (installation The wires 7 are much larger and are chosen because of the convenience of soldering the wires. The contact 1 may have another shape, however, the radius of curvature 45 must be large enough to prevent jams of the contacts during operation of the device. from each other at a distance - QI SRI, which provides the possibility of making holes 5 of a cylindrical shape in them, located at a right angle to the surface of the boards 3.

contacts 1 of the force corresponding to the necessary requirements, for example, lying in the range of 0.50-1.00 N, after which the screws 12 are tightened. The test plate 6 is fixed to the moving guide 2, for example by means of a bottom plate J7, for which iff c | and 1, an extra torque force P is applied, which moves the board 6 down to the contact of the movable guide 2 with the 15 ° plate. At this end, 1 abut free ends into the contact pads of the tested board 6 and are deformed in the area of the lattice 8, moving deformed areas between the bars 9 which prevent the possibility of closing a contact: cts 1. friend to each other. Codes 1 affect the contact pads of the board 6 with contact pressure, which ensures reliable contact, since the required contact pressure is determined by the choice of the distance

Between the fixed guide 3, jj, a grid is installed and secured

made in the vce packet pack., and the base 4 is placed the grid 8, which interacts with the contacts 1, to which it imparts a smooth outward bend

8 above the base 4. The free running of the movable guide 2 provides a more pronounced difference in the heights of the contact pads of the tested

the shape in this zone is sufficient so that the contacts 1 in this zone can be bent under the action of forces that do not go beyond 0.05-0.10 kgf. The grille 8 can be made of a national team, for example, from the slats 9 and rods 10. The grille 8 is fixed to the brackets 11, whose height above the base 4 can be changed by moving the pre-loosened screws installed in the longitudinal slots 13 made in the housing 14 connected to plate 15, above which on the springs 16 with the possibility of vertical movement fixed movable guide 2.

The device works as follows. I

The pre-grid 8 is installed by moving the brackets 11 and the pre-loosened screws 12 along the slots 13 above the base 4 at a distance at which the rod 10 bends the contacts 1 above the base 4 so that their further deformation in this area

occurs when acting on the ends

contacts 1 of the force corresponding to the necessary requirements, for example, lying in the range of 0.50-1.00 N, after that screws 12 are tightened. The test plate 6 is fastened to the moving guide 2, for example by means of a plate J7, for which iff c | and 1, an extra torque force P is applied which moves the board 6 downward until the movable guide 2 is in contact with the 15 ° plate. This end 1 is supported by the free ends of the contact pads of the tested board 6 and is deformed in the area of the lattice 8, displaced by deformable portions between the bars 9, which prevent the possibility of closing a contact: ct 1. friend for friend. The contacts 1 act on the contact pads of the board 6 with a contact pressure that ensures reliable contact, since the required contact pressure is determined by the choice of the distance

set and secure the grill

8 above the base 4. The free running of the movable guide 2 provides a more pronounced difference in the heights of the contact pads of the tested

boards 6. When the pressing force P is removed, the movement and control 2 and contacts I return to their original state.

Claims (1)

Invention Formula Contact device auth. St. 949860, different 1429348 By the fact that, in order to increase reliable contact by optimizing the clamping force, a grid is installed between the board pack and the base with the possibility of plane-parallel movement along the normal to the base, through which cells the contacts are passed.