RU2385520C1 - Plug joint - Google Patents

Abstract

FIELD: electric engineering.

SUBSTANCE: plug joint comprises plug socket (3), plug (1) with electric cord (2), automatic system of plug joint disconnection, device for opening of contact seats, lever-disconnector (5) equipped with holder of electric cord (4), and plug pusher (6). Lever-disconnector is installed so that under action of electric cord tension force it interacts with device for opening of contact seats, which helps to contact pins to be easily extracted from contact seats under action of electric cord tension force. In case system for automatic disconnection of plug joint is available, lever-disconnector interacts with device for opening of contact seats via system of automatic disconnection of plug joint. In case plug pusher is available, device of contact seats opening may interact with plug pusher.

EFFECT: simplified disconnection of plug out of plug socket whenever electric cord is tightened with a force that is higher than the permissible one, which may occur due to spontaneous jerking of power supply cord.

4 cl, 4 dwg

Description

The invention relates to electrical engineering. It can be used to connect power to electrical devices that require the possibility of easy disconnecting the plug from the outlet during operation when the electric cord is tensioned with a force exceeding the permissible one that arises from an accidental jerk of the power cord.

The widest scope of the invention is plug-in connections of residential and industrial premises. The development of electrical and electronic equipment has led to the saturation of modern residential and industrial premises with a large number of electrical and electronic devices connected by electrical wires through plug connections between themselves or with the electrical communications of buildings. The presence of a large number of wires increases the likelihood of accidentally catching the electric wire by a moving person or object, which can lead to the fall of a person or equipment, with negative consequences in the form of injuries, damage to equipment or electrical networks.

To ensure easy disconnection when pulling from an accidental jerk of an electric cord, a magnetic fastener has recently been used for laptop power wires (MagSafe). This mount holds the mate of the plug at the end of the power cord in the laptop’s power socket. The force of a random jerk of the electric cord exceeds the force of magnetic attraction, and the cord is disconnected from the laptop. In this case, the power cord itself remains energized, and the pressing force between the contacts of the plug connection should be small. For low-voltage laptop power, these are minor flaws. But for equipment operating from the power supply of industrial and domestic premises with a high, life-threatening voltage, and a higher requirement for contact quality (as a result, more effort is required to disconnect such a connection), these drawbacks do not allow the use of the above device.

A plug connection is known (patent RU 2266593 C1), selected for the prototype, containing a plug socket with contact sockets made in the form of a clip with an open position lock that opens by pressing a button located in the socket with the front plane of the plug when it is inserted into the socket. In this case, the contact sockets clamp the contact pins of the plug. To disconnect the contacts in the socket there is a device for opening the clamps of the contact sockets until they are locked in the open position, acting by pressing the designated lever for opening the contact sockets. In this case, another ejector lever can be used to remove the plug from the outlet. To increase fire safety at the outlet, a system for automatically disconnecting the plug connection, including a safety spring with a lock and a current sensor with a lock opening device, can be used. At a current higher than permissible, the sensor releases the safety spring lock, which presses on the lever for opening the contact sockets, which leads to the release of the contact pins and pushing the plug out of the socket. Thus, the connection design includes the possibility of disconnection when exceeding various controlled parameters (not only current strength), including the tension of the electric cord.

The technical result of the invention is to provide easy disconnection of the plug from the outlet when pulling the electric cord with a force higher than the allowable, which may occur from an accidental jerk of the power cord.

The technical result is achieved by the fact that on the socket there is a disconnecting lever equipped with an electric cord holder, while the disconnecting lever is installed in such a way that, under the influence of the tension of the electric cord, it interacts with the opening of the contact sockets, which allows the contact pins to be easily removed from the contact sockets under the influence of the tension of the electric cord. If there is a system for automatically disconnecting the plug connection, the lever-disconnector interacts with the device for opening contact sockets through the system for automatically disconnecting the plug connection. With a fork ejector, the contact slot opener can interact with the fork ejector. This allows a more reliable separation of the plug connection.

Figure 1 shows a plug-in electric plug-in connection in a connected state, side view.

Figure 2 is a plug-in electrical plug-in connection in the open state, side view.

Figure 3 is a plug-in electric plug-in connection with the automatic disconnection system in the connected state, side view.

Figure 4 is a plug-in electric plug-in connection with the system of automatic disconnection in the open state, side view.

The plug connection works as follows. In the connected state (figure 1), the plug 1 with the cord 2 is in the socket 3. The cord 2 passes through the plug of the cord holder 4 of the cord lever 5 (the holder can be made in the form of a slider on the cord lever, which will allow you to adjust the permissible cord tension). The contact rods 6 of the plug 1 are tightly covered by the collet clamps of the contact slots 7. The contact slot opening device includes a slider 8 that can move along the guides 9, a contact opening opening lever 10 and a contact open position lock 11. The slider and the contact opening lever are located in the upper position and do not affect the collet clamps of the contact sockets 7. When pulling the cord 2 (figure 2) from a random jerk in the direction of the arrow, the force on the cord lever 5, allowing the cord lever to operate the contact opening device. The lever for opening the contact slots 6 moves the slider 8 down the guides 9. The collet clips of the contact slots 7 open. The latch for the open position of the contact slots 11, while holding the lever for opening the contact slots 6, allows the plug 1 to move freely from the socket 3 under the action of the pulling force of the cord 2. At the end of the movement, the lever for opening the contact slots 6 can actuate the lever-ejector plug 12, which can move plug 1 from receptacle 3 is more reliable than without an ejector.

If the plug connection has a system for automatically disconnecting the plug connection, the lever of the cord 5 (FIG. 3) acts on the device for opening the contact sockets through this system. The system of automatic disconnection of the plug connection contains a spring 13, which is held in a compressed state by the spring retainer 14, a lock opening device 15, which can operate both from the lever of the cord 5 and from the temperature sensor 16. When pulling the cord 2 (Fig. 4) from an accidental jerk in the direction indicated by the arrow, a force acts on the lever 5, allowing the lever through the release device of the latch 15 to release the spring 13 from the spring latch 14. The spring presses on the opening lever of the contact slots 10, which moves along the guides m 9 slider 8, which opens the collet clamps of the contact socket 7, which allows the plug 1 to move freely from the socket 3 under the action of the pulling force of the cord 2. At the end of the movement, the opening lever of the contact sockets 10 can actuate the fork ejector 12, which moves the plug 1 from the plug Sockets 3 are more reliable. It is possible to bring the plug connection into operation by squeezing the spring 10 until the spring retainer 14 is activated. When using the automatic disconnect system of the plug connection, the time for disconnecting the plug from the outlet is reduced and the reliability of obtaining a technical result is increased.

Thus, the proposed plug connection allows you to easily disconnect the plug from the outlet when pulling the electric cord with a force that is higher than the allowable one that can occur from an accidental jerking of the power cord, and prevent the fall of a person or equipment with negative consequences in the form of injuries, damage to equipment or electrical networks.

Claims (4)

1. A plug connection comprising a receptacle having contact slots in the form of clamps and a device for opening the receptacles, a plug with an electric cord, characterized in that the receptacle has a disconnecting lever provided with an electric cord holder, wherein the disconnecting lever is mounted such in such a way that under the influence of the pulling force of the electric cord, it interacts with the contact socket opening device. 2. The plug connection according to claim 1, having a system for automatically disconnecting the plug connection, characterized in that the lever-disconnector interacts with the opening device of the contact sockets through the system of automatic disconnection of the plug connection. 3. The plug connection according to claim 1, characterized in that the holder of the electric cord is made in the form of a slider capable of moving along the lever. 4. A plug connection according to claim 1, comprising a plug ejector, characterized in that the contact socket opening device cooperates with the plug ejector.

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