Security plug connector

Abstract

The plug connector includes a plug socket having contacts for electrical connection with the pins of the plug, grounding contacts and contact clamps, and also, in fact, the plug itself has pins for making contact with the plug socket for electrical connection and fixing. The plug socket carries out automatic switching when connecting / disconnecting the plug.

Description

[0001] DESCRIPTION

[0002] SECURITY PLUG CONNECTOR

[0003] This device belongs to the branch of the electrical industry, which produces electrical products for the production, transmission and consumption of electrical energy, namely plug connectors.

[0004] A known plug connector which, according to GOST 30988.1 - 2020 (IEC 60884-1:2013) classification, is designed and constructed so that when installed and / or wired as in normal use, live parts are not accessible, even after removal parts can be removed without using a tool [1]. Its live parts are also not accessible when the plug is partially or fully inserted into the outlet. For this purpose, the device is equipped with a cover and a cover plate, as well as protective curtains in the terminal holes and drain holes in the event that, for any reason, moisture penetrates into it.

[0005] This device restricts access to live parts, preventing electric shock and moisture.

[0006] The disadvantages of this technical solution are that the cover and the closing plate, after opening, provide access to the outlet holes in case of improper use. By closing the outlet openings only after disconnecting the plug, the cover and the closing plate also leave the possibility for foreign objects, say metal, to penetrate there, which will lead to electric shock. Protective curtains do not properly ensure complete tightness, as their principle of operation involves the presence of gaps. This device sparks during connection / disconnection, which is not advisable from the point of view of fire safety. The terminals of this device are constantly under alternating voltage, due to which they work as a radio antenna, being a source of electromagnetic radiation, which also has a physiological effect on living organisms, which is impractical from the point of view of environmental protection and electromagnetic safety standards of the environment.

[0007] The basis of a useful model is the task of reducing the probability of electric shock in case of possible improper operation of this device, as well as the failure of the device even if moisture gets inside. Solve the problem of fire safety by eliminating sparks when switching the plug with the outlet. Solve the problem of electromagnetic safety by eliminating electromagnetic treatment during and after disconnecting the plug from the outlet.

[0008] The task is solved by the fact that the plug connector is arranged in such a way that before connecting the plug to the outlet, it was disconnected from the network first, and turned on only after connecting the plug to the stop. To solve the problem, the socket 1 under the case is provided with two vertical contacts 2 fixed on latches on the sides of the terminals. A jumper 3 is installed under the terminals between the vertical contacts. At the base of the socket, outside its working area, there are printed circuit boards with the electrical circuits of the 5 V, 2 A DC pulse power supply unit (IBPPT) and the AC opto-resistor switch (OSKPT) 5 with nominal voltage , For example, 600 V, that is, with a margin.

[0009] The essence of the useful model is explained by the schematic diagram shown in an expanded form in fig. 1

[0010] The same diagram of a useful model, taking into account the design features of the outlet, is shown in Fig. 2.

[0011] The principle of operation is shown in the drawings of Figs. 1, 2, 3 and 4.

[0012] The electrical circuit is conditionally divided into high-voltage (HF) and low- voltage (LF) parts. VHF wires are shown in orange and blue colors, which indicate phase and zero, respectively. Microwave wires are shown in red and black colors, which mark the "+" and terminals, respectively.

[0013] VHF is a mixed connection, which is a combination of serial and parallel connections . To the terminals of the primary source (fig. 1, 2), in the form of a shield or any other source, the terminals of the socket 1 and the terminals of the OSKPT 5 are connected in series to 220. In parallel with the primary source, the input terminals of the UPS 4 are connected to its terminals.

[0014] The UHF is a serial connection of the corresponding "+", output terminals of IBPPT 4 and input terminals of OSKPT 5, designed for the same voltage of 5 V, interrupted by vertical contacts 2 and jumper 3.

[0015] Until the plug is connected to the outlet, it remains disconnected, as firstly it breaks the circuit by itself and secondly the circuit breaker remains closed. Thus, only the input terminals of IBPPT 4 are under voltage, which, being a model of the charger before the short-circuiting of the UHF jumper, works in the "on-call" (background) mode, producing a quiescent current at the output terminals that is much lower than the nominal one, that is, less than 5 V.

[0016] After connecting the plug to the socket, its pins first enter the holes, contact the socket terminals 1. When the plug is moved further along the guides, the protrusions of the socket body push the jumper 3, initiating its connection with the vertical contacts 2. The LV part is closed via the corresponding + » output terminals IBPPT 4, which give 5 V and the input terminals of OSKPT 5, initiating the opening of the triac . After opening the triac, it passes an alternating voltage of 220 to the outlet 1, which feeds the consumer connected to it through the plug. After disconnecting the plug, the reverse process occurs. Jumper 3 closes and the low-voltage circuit breaks, the triac closes, stopping the current supply to socket 1.

[0017] Advantages of this solution.

[0018] The probability of electric shock in the case of possible improper use of this device is significantly reduced, as well as its failure even when moisture gets inside, which takes into account the following safety points:

[0019] 1. Shorting of the high-voltage part, carried out by a low-voltage current of 5 V, 2 A, which is safe for humans.

[0020] 2. Since the socket terminals are disconnected before the plug is connected, the moisture and condensate that has settled will not cause a short circuit.

[0021] 3. If you connect an iron foreign object to the phase terminals or short them, the current will not pass through them.

[0022] 4. Since the ends of the jumper of the low-voltage circuit that closes the high- voltage circuit are recessed into the protrusions of the outlet body, it will be impossible to press on them with your fingers.

[0023] 5. Since the high-voltage circuit of the low-voltage circuit requires the two ends of the low-voltage circuit jumper to touch two vertical contacts at the same time, it makes it difficult to turn on the high-voltage part. That is, if you press one of the jumpers with an iron foreign object with one hand, and with the other hand climb into the phase terminal with another iron foreign object, or short the terminals, then the current will not flow through them.

[0024] 6. If you take a foreign plate and move the jumper of the low-voltage circuit with it, the current will appear in the terminals, but at the same time it will block access to the terminals, which will not be able to connect anything to them at all.

[0025] Thus, the incorrect use of the plug connector is made extremely inconvenient, and the risk of electric shock is extremely minimal.

[0026] The problem of fire safety has been solved by eliminating sparking when switching a plug with a socket.

[0027] The problem of electromagnetic safety has been solved by eliminating electromagnetic treatment during and after disconnecting the plug from the outlet.

[0028] Sources:

[0029] 1. GOST 30988.1 — 2020 (IEC 60884-1:2013). ELECTRICAL PLUG CONNECTORS FOR HOUSEHOLD AND ANALOG PURPOSES Part 1 General requirements and methods tests (IEC 60884-1:2013, Plugs and socket-outlets for household and similar purposes — Part 1: General requirements , MOD ) Official edition . Moscow Standartinform 2020.

Claims

USEFUL MODEL FORMULAThe plug connector contains a plug socket having contacts for electrical connection with the pins of the plug, grounding contacts and contact clamps, as well as, in fact, the plug itself has pins for making contact with the plug socket for electrical connection and fixing the flexible cable, which is distinguished by the fact that the plug socket carries out automatic switching when connecting / disconnecting plug socket.

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