SU1176459A1 - Contact-lug for wiring wire on printed circuit board - Google Patents

Abstract

CONTACT TIP FOR INSTALLATION WIRE A PCB THROTTLE, containing a central cylindrical part, a cradle with crimp legs for fixing the mounting wire and spring contact petals, made C-shaped, which is designed to improve vibration resistance and reliability, to improve vibration resistance and reliability. The lodgment is made in the form of a cylinder truncated in the upper part to a depth of at least 1/2 of the cylinder diameter and not more than 2/3 of its height, and the contact lobes are divergent, and their height does not exceed the thickness of the joint single PCB. . (L 9) 4 JV CO

Description

The invention relates to instrumentation, in particular, to the production and design of electronic equipment, and can be used in on-board electronic equipment of aircraft and other objects operating under conditions of vibration loads and all-climatic conditions (in the frequency range 5-2000 Hz with acceleration up to 50 g, in the temperature range from -60 to +155 С, relative air humidity up to 98% at t +40 С and other factors).

The purpose of the invention is to increase the vibration resistance and reliability of contact.

FIG. 1-3 depicts a contact tip; in fig. 4 - scan contact tip; in fig. 5 a sequence of technological operations for the formation of a contact tip shape; in fig. 6 and 7 - the proposed contact connection of thin (vibration-resistant at the connection points) wires (cross section up to 0.2 mm using the contact tip shown in Fig. 3; in Fig. 8, the same (vibration-resistant at the connection points) conducting ( with a cross section of more than 0.2 mm) using the tip shown in Fig. 3, without crimping legs and the remaining part of the cylinder); in fig. 9 is the same as single wires or transceivers of an elec- troradio element using the contact tip shown in FIG. eight.

The use of the invention reduces the complexity of installation, increases the vibration resistance and reliability of electronic equipment.

The middle part of the contact tip 1 is cylindrical and provided with a lodgment 2 in the form of a truncated cylinder 3 with a conical shape of a slice, and truncation is performed in the upper part of the lodgment 1 to a depth of less than half the diameter of a tsimpinder and not more than 2/3 of its height, to ensure maximum strength lodging and free access to the place of laying and soldering wires.

The bottom 2 in the lower part has two concave C-shaped flat lobes 4 equidistant from each other to limit the axial movement of the end of the wire 5 (Fig. 6) and create an elastic contact device by extending the concave petals in opposite directions with a height not exceeding self-fixing the contact tip in the metallized opening of the printed circuit board and creating electrical and mechanical contact between the end of the cylinder bottom. the lodgement 6 (Fig. 6) with the top metallized surface and the metal: with a hole 7 of the printing plate. The width of each petal should be no less than 1/4 of the circumference of the lower part of the cylinder of the lodgment to ensure maximum durability of the C-shaped petal in the hole of the printed circuit board. The ends of the tabs 4 (Figures 2 and 4) are rounded along a radius of at least half the width of the tabs for easy insertion of the tip into the hole of the printed circuit board. The upper part of the contact tip has a clip formed by continuing the upper remaining part of the cylinder of the lodgment and the two lateral legs 8 (Fig. 2) to further secure the wire 9 (Fig. 6) along the insulation.

The connection is carried out as follows.

The contact tip 1 (Fig. 6) is installed into the metallized hole 7 of the printed circuit board up to the stop, while the contact self-locks in the opening of the printed circuit board using a C-shaped petal with rounded ends and the cylinder end of the bottom part of the cradle 6. After the contact tip is installed its additional mechanical fastening with the help of stepped soldering 10 with refractory solder and ensuring more reliable electrical contact with the metallized hole 7 of the printed circuit board. In order to protect the contact joint from external factors (corrosion, rozii), the places of the ration 10 (p / plat.) Are coated with an electrically insulating varnish (at least two layers). The installation wire 9 of the bare part of the wires of wire 5 in the cradle 2 contact-lugs against the stop into two concave lobes of the cradle is fixed, the wire 9 is secured on the insulation with the help of two lateral legs 8 and the brazed solder 11 wires in the cradle

transitional contact more fusible. solder.

When installing, painting, crimping the contact tip, special technological devices are used for ease of installation.

11764594

When mounting rigid (vibration-resistant) stranded or single-core wires (cross-section more than 0.2 mm) or the outputs of radio-radioelements, the connection is made with the help of the contact tip shown on League. one.

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FIG. 9

Claims (1)

CONTACT TIP FOR MOUNTING A WIRE ON A PCB, containing a central cylindrical part, a lodgement with crimping tabs for fixing the mounting wire, and spring contact tabs made of a C-shape, characterized in that, in order to increase vibration resistance and reliability of contact , the lodgement is made in the form of a cylinder, truncated in the upper part to a depth of not less than 1/2 of the cylinder diameter and not more than 2/3 of its height, and the contact petals are made diverging, and their height does not exceed the thickness of the joint second printed circuit board. . Osh SU (in 1176459> Fig! 1 1176459