SU920910A1 - Electric jointing sleeve - Google Patents

Description

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The invention relates to electrical engineering, and is more languid to screwless electrical contact sockets, and can be used in all branches of the national economy to connect electrical conductors, mainly fire alarm systems, radio and telephone communications.

Electrical connectors are known in which the elastic elements (springs) are made in one piece with the contacts, the connection of the conductors occurs due to the incision of the sharp edge into the body of the conductor 1.

The disadvantages of such connections are the possibility of cutting the conductors due to the constant impact of the sharp edges of the elastic elements, the high operating costs associated with the restoration of the cut conductors are poorly reliable, and the laboriousness of manufacturing is considerable, due to the complex shape of the elastic element.

Electrical clips are known, consisting of a contact spring and a pushbutton 2}.

The disadvantages of such clips are the occurrence of oxide films at the points of contact of the conductors with the springs, the occurrence of stress concentration in the elastic element at the points of contact with the cracker, the weakening of the clamping force, which necessitates periodic tightening of the contact with the screw, a large number of parts, which leads to an increase in size, the mass of the electrical clamp and reduce the reliability of its work.

Also known is the design of an electrical connecting clip comprising a hollow insulating body made with holes for insertion of wires with cooperating clamping lugs on its inner surface interacting with the wires, located inside the housing and an insulating support element connected to it and interacting with wires 11 elastic contact element HZ

However, the known electrical contact during long-term operation creates the negative effect of cutting the conductors of small dimensions, low rigidity, as well as made of materials with low yield strengths. The stress concentration at the spring at the places of kinks — due to the travel stop and the non-smooth characteristics of the contact plate when resizing the conductors leads to a reduction in the service life and reduce reliability. The complexity of the metal contact design leads to an increase in the complexity of manufacturing and the use of sophisticated technological equipment.

The purpose of the invention is to enhance the functionality while improving reliability. This goal is achieved by the fact that, in an electrical connection clamp containing a hollow insulating body with wires for inserting the wires, there is an insulating support element located inside the body and bonded with it to the wires interacting with the wires clamping lugs on its inner surface. the elastic contact element interacting with the wires; the outer surface of the support element is cylindrical and has a locking protrusion; Between the holes for insertion of wires there is a groove adjacent to the fixing protrusion, and the elastic element is made with an opening adjacent to the fixing protrusion and interacts with its ends with clamping protrusions, the surface of each of the latter is inclined to the surface of the contact element and its angle di satisfying the inequality 90 fd 0

. Figure 1 shows the clamp, section; in fig. 2 - fastening of conductors of small exchanges with low rigidity; in fig. 3 - fastening of large conductors with low rigidity; in fig. C - fastening conductors with high rigidity; Fig.5 shows the positions of the elastic element

and configuration of the protrusion of the housing (without a conductor) in fig. 6 - possible connection points and types of conductors; in fig. 7 - fixing the contact element on the support element; in fig. 8 is a possible switching option.

The clamp includes a housing 1 and a support element 2, which houses

0 elastic contact element 3. The housing 1 in the upper part has openings 4 for input-output of conductors and tools. On the inner surface of the body there is a protrusion 5, the plane of which forms with the plane of the elastic element 3 an angle d (figure 5) which can be from O® to 90 °. At small angles, the provision of electrical contact occurs mainly due to the forces of friction, due to the stiffness of the elastic element. The presence of the protrusion 5 provides the ability to conduct electrical connections of conductors

5 of materials with different yield points, stiffness, various sizes and shapes of sections. When creating an electrical connection with the conductor 6 (FIG. 2), which has a small size and low rigidity, under the action of the elastic element 3, it fully bends around the protrusion 5. Simultaneously with the cutting of the sharp edge 7 of the contact element into the conductor, the latter is pressed to the plane 8, which eliminates cutting the conductor and increases the reliability of the electrical connection. When creating an electrical connection with the pole 9 (Fig. 3), having large dimensions and low rigidity, partial conductor rounding protrusion 5 occurs. Cutting the sharp edge 7 into the conductor is limited by increasing the contact surface along the plane 3. When creating electrical connection with the conductor 10 Tfig.) highly rigid

Dies cutting into the conductor of the sharp edge 7 of the elastic element 3 The electric connecting clip consists of parts, for the manufacture of which can be used

high-performance equipment with minimal manual labor costs. Body and support

the element, for example, can be molded on injection molding machines; a flat contact element can be stamped in simple stamps from flat rolled products; metal waste in a particular case is not more than 10% of the contact element. The cost of producing an electrical clamp through simple manufacturing processes is reduced by 10-15%. Increasing the durability of the elastic contact element and improving the reliability of electrical contact reduces operating costs by at least 2 times, leading to greater reliability of the fire alarm systems and, consequently, to reducing damage from fires and intrusions: to protected objects.

Claims (3)

Invention Formula An electrical connecting clip comprising a hollow insulating body with holes for introducing wires, with clamping lugs cooperating with the wires on its inner surface, located inside the housing 209106 and an insulating support element bonded to it and an elastic contact element cooperating with the wires, characterized in that 5 in order to expand the functionality while improving reliability, the outer surface of the support element is cylindrical and has a fixing protrusion, on the inner surface: the body is made located j between the holes for inserting wires groove, mating with the locking protrusion, and the elastic element is made with a hole mating with the fixture, siruyu protrusion, and Interaction of their ends with clamping protrusions, the surface of each of the latter is inclined to the surface 20 of the contact element and it is the angle c1 satisfy the inequality yuschy. Sources of information taken into account in the examination of 25 1. USSR Copyright Certificate № J eiOSl, cl. H 01 R 9/08. 2. German Patent N, cl. H 01 R 7/08, 1972. 3.Patent UK 30 fT, cl. H Ot R 7/28, 1973.