ES2203333B1 - SWITCHING DEVICE FOR GROUNDING AND ELECTROMAGNETIC PROTECTION FOR DOMESTIC ELECTRONIC DEVICES. - Google Patents

Abstract

Switching device for grounding and electromagnetic protection for domestic electronic devices. The device comprises a switching box equipped with multiple terminals intended to receive the grounding pins of two electronic devices, whose terminals are connected to each other and with a receiver terminal of a link conductor with a pluggable grounding device of Direct mode to the ground of a standard female socket base.

Description

Switching device for commissioning Earth and electromagnetic protection for electronic devices domestic.

The present invention relates to a device switching for home electronics that is intended to ensure a safe and comfortable grounding in your use and also allow permanent control of the ground and voltage indication, providing protection electromagnetic and being appropriate for all types of devices electronic and its complementary elements, which work from according to the scheme of a single connection point.

As is known, the generalization of devices everyday electronics has revealed the need of introduction of devices that improve security, both from an ecological and technical point of view, and at the same time have a sensitive ease of handling and adaptation, seeming as one of the recurring problems to solve that of the grounding and electromagnetic protection of devices electronic

As is known, electronic devices are sources of electromagnetic radiation covering a wide range of frequencies Thus, for example, the PC generates a field electromagnetic that is characterized by a very complex range of frequencies from 5 Hz and up to 1000 MHz and higher, while that the radiation of PC monitors can vary from 5 Hz up to 400 KHz, with electric field voltage of 1.0 v / m up to 75 v / m and above, measured at a distance of 50 cm from the screen of the monitor, according to the axis line. The oscillations of the intensity depends on the type of the monitor and the conditions of utilization. The existence and quality of the grounding of the computer elements plays a determining role to be able to decrease radiation intensity. For example, at a distance 50 cm from the screen, the electrostatic charge value of field ranges between 400-500 v with grounding, however reaching up to 25 kv./m without grounding. Field electrostatic in the keyboard area can reach 10 (12 kv./m; These data have been taken from studies conducted by the Swedish Institute for the Protection of Radiation and Electromagnetic Security Center in Russia.

Experiments carried out by the inventors have shown that, in order to reduce the intensity of electric field up to an allowed value ≤ 3 v / m (frequency of 5 Hz to 2 KHz), it is sufficient to have a grounding safe. The indicated value is below the permissible limit of according to the MPRII standard. In this regard it can be indicated that screen protection filters for monitors protection against electromagnetic radiation are only justified in case there are earth sockets for the filter, since without said earth the filter itself can be become an additional radiation source due to reflection excessive electromagnetic waves.

On the other hand, of the utilization analysis of computers, it is observed that the work of computers or other electronic equipment that does not have an earth connection can carry to erroneous estimation of the safety parameters and, in addition, the Most security filters installed on monitors do not can be connected to the grounding contacts due to the absence thereof in the vicinity of the monitor.

It should also be taken into account that in case of try to connect the filter to the existing ground in the mains plug or on the back panel of the processor computer equipped with the ground, measures of special safety to avoid injuries caused by electric current.

In addition, the number is constantly growing of additional equipment that requires grounding, which requires creating special devices for correct commutation.

Currently, to try to solve the mentioned problems, you try to proceed to the correct connection of electronic devices with the help of regular plugs with socket of earth by contact. However, these plugs are devoid of the indication of the existence of the taking of land.

In some filter models, the use of electric extensions provided with several plugs with ground and network indicators, such as types GA-01, GA-01ª, of the firm Defender and the Neus Haus UPS blocks of the Smart Line series. However, These equipments are not equipped with the grounding contacts for additional devices and for computer elements, which do not they have the standard male plug with the contact of the socket land.

As another previous one can cite the filter "Surge Protector", manufactured by Sunny Line Informática S.L., which is not equipped with an outlet indicator ground and with high interference suppression filter frequency, so it protects only short interference in the form of short-term power breaks in the network electric

On the other hand, the mentioned equipment is fixed and cannot be used in the form of operational indicators, on all in case they have the load connected to them.

There are also devices today for indication of voltage and grounding in the network electric, such as:

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Multimeter VT002, VT 30, DM (311, etc.

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Devices for measuring the voltage of type ST (393TR.

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PF Ground Meter (331 (Promax)

However, these devices and devices provide the possibility of assessing the existence of land only in the moment of measurement, so they are not equipment that facilitates a constant indication, requiring for use a specialized and professional preparation, as well as compliance with The necessary safety standards.

To solve the problems above noted, the inventors have conducted numerous experiments that have allowed to reach the current invention, getting a device that ensures a safe land, which is comfortable in its use, which allows a permanent indication control, which It is suitable for all kinds of electronic devices and peripherals of them that work according to the scheme of "a single dot. "The device object of the present invention is equipped with indication of voltage and ground in the power grid protecting connected equipment from high frequency interference in a range between 100 KHz and 100 MHz, and also short-lived interference in the power grid

To achieve your goals, the device object of the present invention comprises three elements fundamental as they are a switching device of the elements of electronic devices for grounding; a ground connection for a secure connection from the switch to the plug electrical standard with earth contact; and a filter-indicator to control voltage and ground of the network. The switch is intended to switch the devices electronics with earth through the earth connection.

As you can see, the switch has as special features the absence of low elements voltage, the connection of all components of the equipment complex structure, such as a single point computer land, which excludes the appearance of electrical potential in the equipment as well as high frequency interference through the ground wires

The earth connection is intended for connection from the switch to the standard mains plug with the contact of ground and has a modified plug shape in which a male plug to connect to the female socket of the network with the ground contact exclusively by means of copper wire Multiple threads and screen. The central conductor wire is greater than 0.5 mm2 section in the opposite part of the splice switch.

The earth junction is characterized by the absence of contacts in the conductive parts of current and existence of a cable with a screen to ground the point common on the switch with the ground point of the plug electric.

The indicator filter is intended to control the earth and voltage in the electricity grid, as well as the decrease in High frequency interference and short duration. Have electrical contacts for connection of an internal scheme electronic with the standard electrical plug with ground and has two indicators, so that it can indicate the existence of tension in the electricity grid and the existence of land.

In case of damage to the network, such as poor contact in the power grid, temporary loss of contact with the phase, with neutral or with earth, will be manifested in form of flickering or weak illumination of the indicators.

For your better understanding they are attached, by title an explanatory example but not a limitation, some illustrative drawings of the present invention.

Figure 1 schematically shows the set of related elements by the present invention.

Figure 2 shows an electrical diagram of the switching device

Figure 3 shows an electrical diagram of the protective earth-filter indicator.

Figure 4 shows a perspective view of the set consisting of the switch, the earth connection and the cable Connection.

Figure 5 shows a perspective view representative of the switch layout and the indicator of ground-filter spliced to the network.

Figure 6 shows a perspective view of a protective indicator-filter with its own plug For the electrical appliance.

Figure 7 shows a work mat of the type used in improved design computers.

Figure 8 shows a schematic section by the indicated cutting plane of figure 7.

According to the figures, the present invention It is intended to allow easy and convenient grounding of different electronic devices, for example, of domestic type, represented in block (1) that has the meaning of multiple devices connected by individual connectors (2), (2 '), (2 '') ... with a central switching box (3) that features multiple connection terminals to the different devices and also a connection terminal (4) to a conductor (5) that is connected to a grounding device (6) potentially with intermediate a ground indicator and protection filter indicated schematically with the numeral (7), equipped with its own plug or without plug, indicated with numeral (14).

The connection of the different devices contained in the block (1) with earth it can therefore be carried out with the switching box (3) and cable (5) connected to the socket of ground (6) if only one earth connection is desired in the due conditions for the mentioned devices and the connection with Intermediate ground indicator and protective filter (7), (14) se perform only in cases where the function is desired Indicator and electromagnetic protection of the devices.

In figure 2 it has been shown so Schematic of the switching box (1), conductor (5) and grounding device (6) without indicator and protective filter. The switch box (1) comprises the multiple terminals indicated with the letters (A), (B), (C) and (D), in variable number, connected internally by the driver schematically represented with the numeral (8) so that one of said terminals will receive a pin connection or miniature banana (9) connected to the conductor (5) and this one, by means of another extreme connection pin (10) of equals features to the pin (9), will be connected to the device grounding (6) presenting the appropriate terminal (11) for said function and that will establish contact exclusively with the sockets of earth (12) and (13) that are usually found in an outlet female for network connection. The grounding device (6) may be made with a structure similar to the plugs of standard male type, intended to match in a plug of a female base of a fixed installation of a building, presenting contact for earthing but not for earthing stream.

The grounding indication device and protection filter has been represented in an exemplary embodiment in figure 3. This figure shows the arrangement of a circuit that, fed through the mains voltage from the connection, for example, in a conventional female base (14), feeds a varistor (V3) and in parallel, the branches (15), (16), (17), (18) and (19). The branch (15) comprises the capacitors (C1) and (C2) and receives the ground connection represented by numeral (20) through the conductor (21) that feeds the neon lamp (L1), green, which, through the resistance (R1), is connected to the branch (15). The branch (16) has a second lamp Neon (L2), red and resistance (R2). The branch (17) presents the condenser (C3). The branch (18) presents two capacitors respectively (C4) and (C5) with a connection (22) with the branch (19) and grounded, which has been represented with the numeral (2. 3). Finally, the branch (19) presents the varistors (V1) and (V2)

The arrangement of neon lamps (L1) and (L2), respectively green and red, provides a coding of indicative lights in the following sense:

to)

(L1) lit green; (L2) lit red: situation normal;

b)

(L1) and (L2) off - no connection;

C)

(L1) Green color; (L2) red - no grounding;

d)

(L1) Green color; (L2) off - there is no neutral.

As an exemplary embodiment, not limitative, indicate the values of the circuit components below from figure 3:

C1, C2 - 0.1 µF x 400 v

C3 - 0.1 µF x 400 v

R1 - 100-200 k

R2 - 470-500k

C4, C5 - 4.7 nF x 2000 v

V1, V2, V3 - 680 NR10D

L1, L2 - Neon light - 1.05 mA

The lighting of the neon lamp (L1) will indicate the grounding and the lighting of the neon lamp (L2) will indicate the existence of tension in the line.

In case of alterations in the line, the brightness difference may be interpreted in a timely manner.

In figure 4 it has been represented as example a material embodiment of the switching box assembly (24), connecting cable (26) with connecting pin (25) and the workpiece ground connection (27) that also receives the connecting pin (28) cable connection (26).

The grounding element (27) presents a structure equivalent to that of a male connector attachable to a standard plug base, but without connection to the terminals of network current.

Figure 5 depicts the case. schematically shown with numeral (7) in figure 1, in the that the connection between the network and the switching box is made by means of the intermediate device (7) corresponding to the indicator of earth and protective filter shown in figure 3, which presents a terminal (29) for connecting the cable end (26) of the box switching (25), also presenting the neon lamps (L1) and (L2) that have been represented in Figure 3.

In the case where the indicating device of earth and protective filter (7) has its own plug will adopt the structure shown in figure 6, in which said device (7) that has a standard plug housing (30) and that otherwise is endowed with the same structure that has been represented in figure 3, showing the neon lamps (L1) and (L2).

In figures 7 and 8 a perfected mat (31) usable in a computer, presenting an area (32) of habitual structure at commonly used to support a "mouse" or another device, having the characteristic that it is connected to ground by conductor (33) with intermediate resistance (34) regulatory type, in accordance with the present invention, and whose specific feature is the layout of an area (35) at the end of the mat (31) closest to the user, which has very low friction characteristics for the purpose of avoid the problems that currently occur in the floor mats of known type, in which the friction of the user's wrist over the zone (35), which has the same characteristics that the zone (32), are unpleasant consequences of muscle alteration in the wrist and arm of the Username. Therefore, the provision of the area (35) with very low friction, much lower than in the area (32), being able to perform, for example, by means of a conductive plate connected to the ground conductor (33) and multiple free spinning balls (36) incorporated in said plate and that allow to minimize the friction of the user's wrist. The realization may be variable, having shown in Figure 8 the arrangement of a base (37) of a conductive material that receives the connection of the ground conductor (33) and an upper plate (38) forming between both housings for the balls (36), for example, by means of the facing conical housings (39) and (40) or holes of another type. As will be understood, the area of least friction (35) it could also be made with other materials, for example, ceramic materials with a high degree of polishing, materials Metals also equipped with a high degree of polishing, etc.

As seen through the description attached and explanatory drawings, the present invention allows easily and conveniently solve both the simple connection to safe ground of any domestic electronic device, such as a computer and its peripherals, as well as getting simultaneously an electromagnetic protection and function of ground and voltage signaling.

Everything that does not affect, alter, change or modify The essence of the described device will be variable for the purposes of The present invention.

Claims (8)

1. Switching device for grounding and electromagnetic protection for domestic electronic devices, characterized by comprising a switching box equipped with multiple terminals for receiving the grounding pins of two electronic devices, whose terminals are connected to each other and with a receiver terminal of a link conductor with a grounding device directly coupled to the grounding of a standard female socket base. 2. Switching device for earthing and electromagnetic protection for domestic electronic devices, according to claim 1, characterized in that the earthing device also has an internal filtering and protection circuit with externally visible light indicators of the ground connection and of the existence of tension. 3. Switching device for earthing and electromagnetic protection for domestic electronic devices, according to claim 1, characterized in that the grounding device adopts the structure of a male plug attachable to a conventional female socket base, presenting only contacts for grounding, lacking contacts for the network. 4. Switching device for earthing and electromagnetic protection for domestic electronic devices, according to claim 2, characterized in that in the event that the grounding plug is provided with a grounding and protective indicating device, it simultaneously has an outlet ground for the power supply of the connection conductor with the switching box and power socket for the supply of the protection circuit and current indicator. 5. Switching device for earthing and electromagnetic protection for domestic electronic devices, according to claim 3, characterized in that the circuit fed by the mains current feeds a varistor and has five other branches mounted in parallel, the first of the which consists of two capacitors between which the neon lamp indicating the grounding is connected, with a resistor, the second branch presenting the current indicating neon lamp and a resistor; the third branch presenting an intermediate capacitor and the fourth, a set of two capacitors with intermediate connection to the fifth branch that has two varistors, the connection between the fourth and fifth branches being also grounded. 6. Switching device for grounding and electromagnetic protection for domestic electronic devices, according to claim 1, characterized by the grounding of a mat to be used in combination with a computer or the like for the placement of the "mouse" or other Similar devices, which have an area on the edge next to the user made of a material and / or very small surface treatment of friction, involving a metal area for connection to a grounding cable. 7. Switching device for earthing and electromagnetic protection for domestic electronic devices, according to claim 6, characterized in that the reduced friction zone is constituted by multiple free spinning balls inserted in the area of the mat immediately to the user. 8. Switching device for earthing and electromagnetic protection for domestic electronic devices, according to claim 7, characterized in that the area of the mat provided with reduced friction characteristics has a conductive bottom plate connected to the grounding cable and provided of multiple housings to receive free spinning balls that are imprisoned by another upper carrier plate also of other housings opposite those of the lower plate to retain the balls against their accidental exit and allowing their free spin.