RU2266593C1 - Plug connector - Google Patents

Abstract

FIELD: connection of power supply or switching of electric and electronic devices as well as electric and electronic circuits.

SUBSTANCE: contact jacks of plug connector made in the form of U-shaped clamps with shaped projections or draw-in attachments are provided with detents for shaped projections of U-shaped clamps or for heads of draw-in attachments. Detents of each contact jack have springs to create hold-down pressure on contacts. Slider designed to displace detents from input hole of contact jack is set in motion by lever held in position by means of locking device. Release button of locking device protrudes from contact jack shroud plane in vicinity of pin entry. Contacts are brought together upon complete entry of contact pins into contact jacks due to pressure of front wall of contact-pin unit wall on locking device release button. Contact separation takes place upon pushing slider displacement lever. Use can be also made of lever that pushes contact-pin unit under action of slider displacement lever out of contact jack hole. When provided with safety spring and current sensor, proposed plug connector enables overload protection of supply mains.

EFFECT: enhanced reliability of contact for different-thickness contact pins or strips, facilitated contact connection and disconnection, enhanced electric and fire safety.

3 cl, 6 dwg

Description

The invention relates to electrical engineering and electronics and can be used both for connecting power to electrical and electronic devices, and for switching electrical and electronic circuits, requiring the operation of the possibility of easy disconnection or connection of contacts.

The widest scope of the invention is the plug connections of residential and industrial premises, consisting of a plug with contact pins and sockets with contact sockets. The socket or pin is made of an elastic electrically conductive material of such a shape that when the contacts are connected, an elastic deformation of this element occurs, which provides the compression necessary for a good contact. Therefore, a force must be applied to connect or disconnect the plug connection. Moreover, the efforts when connecting and disconnecting the plug with the outlet act in opposite directions and often loosen or break the fastening elements of the plug connection. As a result, when the plug is removed from the socket, the socket itself is pulled out of its place of termination. This makes the plugs very dangerous in terms of fire and electric shock. The plug is held in the socket only due to the frictional force between the contacts. Therefore, often when the plug is not fully inserted or someone touches the plug cord, the contacts disconnect.

The use of imported household appliances having plugs with a greater thickness than the domestic thickness of the contact pins required the versatility of the plug connections. Modern sockets allow you to insert plugs of different thicknesses into them. The contact sockets of the plug sockets are too loose for domestic standard plugs and too narrow for imported plugs. This reduces the reliability, safety and durability of the plug connectors.

To ensure a more reliable electrical contact and a more reliable fixation of the plug connection, additional structural elements are used that press the contacts to each other, or connect the contact housings to each other. Moreover, the clamping is carried out by additional operations (screwing up the contact housings, shift or rotation of the clamping elements, etc.). Before disconnecting the contacts, it is also necessary to carry out the operation of releasing the contacts from the clamp or disconnecting the housings.

A known method of electrical contacting of power electrical equipment (RU 2121739 C1, 03/26/93, H 01 R 13/193) using a collet clamp. The contact socket is made in the form of a collet, which clamps the contact rod with an abutment force pressed to the head of the collet by an electric drive, and is held in the clamped state by the weight of the electric bus with the contact socket acting on the stop. To separate the contacts, the contact socket is raised and the stop lowered.

Also known is the plug connector (RU 1737583 A1, 08.16.90, H 01 R 13/11) selected for the prototype, comprising a plug with consoles and contacts and a socket enclosed by a movable frame. The plug contacts enter almost without friction into the socket contacts, and the plug consoles enter special holes in the socket and release the movable frame from the latches for movement in the direction of the plug. When moving the frame with special protrusions, which play the role of stops, compresses the spring-loaded contacts of the socket outlets around the contacts of the plug. Before pulling the plug, the movable frame is shifted back. When removing the plugs, the clips lock the frame in the lower position. In this design, to clamp and release the contacts, an additional operation is needed - moving the movable frame. The position of the frame is set manually by the user, and there is always a danger of jamming the device if the frame is not moved completely. The presence of consoles on the plug and holes for them on the outlet allows you to use the plug only in pairs, which deprives the device of versatility. The pressing protrusions may, as a result of wear or looseness of the movable frame, cease to press the contacts to each other.

The aim of this invention is to provide a combination of technical effects: reliable contact for contact pins or plates of different thicknesses, facilitating the process of connecting and disconnecting contacts while ensuring reliable connections, increasing electrical and fire safety.

This goal is achieved in that the contact nests, made in the form of U-shaped, with figured protrusions, or collet clamps with stops under the curly protrusions of the U-shaped clamps or under the heads of the collet clips, have springs on the stops of each contact socket to create contact pressing forces , the slider for moving the stops from the inlet of the contact socket is set in motion by a lever that is held in the state withdrawn from the inlet of the contact socket by a latch, there is a latch release button, you stepping out of the plane of the body of the contact socket in the region of the input of the contact pin and capable of opening the latch from being pressed by the body of the contact pins when placed in the contact sockets; there is a lever for pushing the block of contact pins under the action of the lever to move the slider from the inlet of the contact socket; there is a safety spring with a lock, for pressing the lever to move the slider from the inlet of the contact socket, there is a current sensor with a device to open the lock of the safety spring when the sensor is triggered to exceed the permissible current.

Figure 1 shows the plug-in electrical plug-in connection in the open state, front view and figure 2 is a side view in section.

Figure 3 is a plug-in electrical plug connection in a connected state, side view.

Figure 4 - electrical plug-in connection at the time of pushing the plug out of the socket.

Figure 5 - plug-in electric plug-in connection using a current sensor with an opening device in a connected state.

In Fig.6 - plug-in electric plug-in connection using a current sensor with a trip device at the time of the sensor.

The plug connection works as follows. In the open state (Figs. 1, 2), the lever 1 is secured in the lower position by a latch 2. The lever 1 holds the slider 3, which the conical washer 5 is used as a stop for the collet head against the action of the spring 4. When the plug 6 is inserted into the socket 7 (Fig. 3), the contact pin 8 enters the contact socket 9 made in the form of a collet. At the end of the movement, the fork 6, with its frontal plane 10, presses the button 11 of the retainer 2, releasing the lever 1. Under the action of the spring 4, the conical washer 5 moves up and presses collet head 1 2 contact sockets. At the same time, it moves upward along the guides 13 the slider 3, which turns the lever 1 upward. By the force of the spring 4, the conical washer 5 clamps the contact pin 8 in the contact socket 9 (for better fixation, the contact pin 8 can be made in the form of a truncated cone with a base at the end of the pin) . To remove the plug 6 from the socket 7 (Fig. 4), press the lever 1. When turning, the lever 1 moves the slider 3 together with the conical washer 5, compressing the spring 4. The contact pin 8 of the plug 6 is released. After the passage of the latch 2, the lever 1 continues to lower and presses the lever of the ejector plug 14, which moves the plug 6 from the socket 7.

Thus, in the proposed plug connection it is easy, in one motion, without effort, to connect and fix the electrical contacts, providing the necessary clamp between them, even when changing the thickness of the contact pins; at the touch of a lever, the electrical contacts are disconnected and the contact pin is removed from the contact socket. Improving electrical and fire safety is ensured by reliable contact when using contact pins of different thicknesses. The clamping force between the contacts in each contact socket is determined by the spring elasticity of this socket and does not depend on the wear of the moving parts of the socket.

The proposed design, with a slight improvement, allows the simultaneous use of the plug connection as a current protection circuit breaker. Figure 5 shows the plug-in electrical plug-in connection with current protection in the closed state. There is an additional spring 15 with a latch 16 and a latch opening device 17 mounted on a bimetallic temperature sensor 18, which measures the temperature of a conductor connected to the contact socket 9. If the permissible current is exceeded, the bimetallic temperature sensor 18 (Fig. 6) releases the spring 15 through the opening device of the latch 17, which presses the lever 1. When the lever 1 moves down, the plug connection is disconnected, as described above, for the case of pressing the lever 1 by hand. It is possible to bring the plug connection into operation by compressing the spring 15 until the latch 17 engages.

Using a plug-in connection with current protection in fire hazardous places, for energy-intensive equipment (for example, for washing machines in domestic premises), the fire and electrical safety of the room can be significantly increased. The trip current of the protection can be significantly less than on machines that protect the entire electrical network of the room, which also increases the safety of operation of the plug connection. The combination of reliable contact, reliable fixation of the connection, ease of connection and disconnection of the contacts, electrical and fire safety of the proposed device allows the invention to be used in many areas of electrical engineering and electronics, where previously, due to differences in requirements, different connection designs had to be used. For example, improving the quality of the contact has complicated the process of connection or disconnection.

Claims (3)

1. A plug connection containing contact pins or plates, contact slots made in the form of U-shaped with figured protrusions or collet clamps with stops for curly protrusions of U-shaped clamps or collet head, slider for moving the stops along the contact slots, characterized in that, in order to ensure reliable contact for contact pins or plates of different thicknesses, facilitate the connection and disconnection of contacts, increase the reliability of the connection, improve electrical and fire safety, by The nuts of each contact socket have springs for creating a contact clamping force, there is a lever for moving the slider from the input hole of the contact socket, there is a latch that can hold the lever in the state withdrawn from the input hole of the contact socket, there is a latch release button protruding from the plane of the housing of the contact socket in the input region of the contact pin and is able to open the latch from being pressed by the housing of the contact pins when they are placed in the contact slots. 2. The plug connection according to claim 1, characterized in that, in order to facilitate removal of the contact pins from the contact sockets, there is a lever capable of pushing the block of contact pins under the action of the lever to move the slide from the input hole of the contact socket. 3. The plug connection according to claim 2, characterized in that, in order to increase electrical and fire safety, there is a safety spring with a lock for pressing the lever to move the slide from the inlet of the contact socket, there is a current sensor with a safety spring lock release device.

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