ES2203333A1 - Switching device for use between grounding terminal and electromagnetic protection terminal of electronic home appliances, has connectable device connected to base of standard socket - Google Patents

Abstract

The device has a switch box connected to multiple terminals of grounding pins of two separate electronic devices, where the terminals are connected with each other. A receiver terminal of a conductor is connected with a connectable device that is connected to a base of a standard socket.

Description

Switching device for grounding and protection Electromagnetic for domestic electronic devices.

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

As is known, the generalization of electronic devices for use everyday has revealed the need for introduction of devices that allow improving security, both from the point of ecological view as a technician, and at the same time present a sensitive ease of handling and adaptation, looking like one of recurring problems to solve the grounding and the Electromagnetic protection of electronic devices.

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 the ground, arriving without However up to 25 kv./m without grounding. Electrostatic field in the keyboard area it can reach 10 (12 kv./m; this data has taken from studies conducted by the Swedish Institute for the Protection of Radiation and Security Center Electromagnetic in Russia.

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

On the other hand, of the analysis of computer utilization, it is observed that the work of computers or other equipment electronics that do not have an earth connection can lead to estimation wrong security parameters and, in addition, most of security filters installed on monitors cannot connect to the grounding contacts due to the absence of them in the vicinity of the monitor.

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

In addition, the number of teams is constantly growing additional that require grounding, which requires the creation of special devices for proper switching.

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

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

As another previous one you can mention the network filter "Surge Protector ", manufactured by Sunny Line Informática S.L., which is not equipped with a grounding indicator and a filter suppression of high frequency interference, so protects only short interference in the form of jumps Short-term voltage in the mains.

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

There are also devices for the indication of the voltage and grounding in the power grid, such as:

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

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Devices for measuring type tension ST (393TR.

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PF ground meter (331 (Promax).

However, these devices and devices provide the possibility to evaluate the existence of land only at the time of measurement, so they are not equipment that facilitates an indication constant, requiring a preparation for its use specialized and professional, as well as compliance with necessary safety standards.

To solve the aforementioned problems, the inventors have conducted numerous experiments that have allowed get to the current invention, getting a device that allows to ensure a safe land, which is comfortable in its use, which allows permanent indication control, which is appropriate for all types of electronic devices and peripherals thereof that work according to the "single point" scheme. The device object of the present invention is equipped with indication of existence of voltage and ground in the power grid protecting the connected equipment of high frequency interference in a range between 100 KHz and 100 MHz, and also of the Short-term interference in the power grid.

To achieve its objectives, the device subject to the The present invention comprises three fundamental elements such as a device for switching the elements of the devices electronic for grounding; a ground joint for a safe connection of the switch to the standard electric plug with ground contact; and an indicator-filter to control the tension and network land. The switch is intended to switch the electronic devices with earth through the earth connection.

As you can see, the switch has as special characteristics the absence of live elements, the connection of all components of complex structure equipment, such as a single-point computer, which excludes the appearance of electrical potential in the equipment as well as high frequency interference through the cables Earth.

The earth connection is intended for the switch connection to the standard mains plug with the ground contact and has modified plug shape in which a male plug is available to connect to the mains socket of the network with the earth contact exclusively through multi-wire copper cable and screen. The central conductor wire is larger than 0.5 mm2 in section on the opposite side of the switch junction.

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

The indicator filter is intended to control the earth and the voltage in the electricity grid, as well as the decrease in High frequency and short duration interference. 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 a bad contact in the electricity grid, temporary loss of contact with the phase, with neutral or with earth, will manifest in the form of flickering or weak indicator lighting.

For your better understanding they are attached, by way of example explanatory but not limiting, some illustrative drawings of the present invention

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

Figure 2 shows an electrical scheme of the device commutation.

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

Figure 4 shows a perspective view of the formed assembly by the switch, the earth connection and connection cable.

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

Figure 6 shows a perspective view of a protective indicator-filter with its own plug for the device electric.

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

Figure 8 shows a schematic section along the indicated plane of cut of the figure 7.

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

The connection of the different devices contained in the block (1) with earth it can be done, therefore, with the box of switching (3) and cable (5) connected to the device land (6) if you only want an earth connection 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.

Figure 2 shows schematically the box of switching (1), conductor (5) and grounding device (6) Without indicator and protective filter. The switch box (1) It comprises the multiple terminals indicated with the letters (A), (B), (C) and (D), in variable number, connected internally by the driver schematically represented with numeral (8) so that one of these terminals will receive a connection pin or banana miniature (9) connected to the conductor (5) and this one, by means of another extreme connecting pin (10) of equal characteristics to the pin (9), will be connected to the grounding device (6) that presents the appropriate terminal (11) for this function and which will establish contact exclusively with the earth connections (12) and (13) that they are usually in a female socket for connection to the net. The grounding device (6) may be made with a structure similar to standardized male type plugs, intended to match in a socket of a female base of a fixed installation of a building, presenting contact for the shots ground but not for the power outlet.

The grounding indication device and filter protection has been represented in an exemplary embodiment in the Figure 3. This figure shows the layout of a circuit which, fed through the mains voltage from the connection, by example, on a conventional female base (14), feed 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), colored 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 coding of indicative lights in the following sense:

to)

(L1) lit green; (L2) on of red color: normal situation;

b)

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

c)

(L1) green; (L2) red - no grounding;

d)

(L1) green; (L2) off - no neutral.

As an exemplary embodiment, not limiting, they are indicated as then the values of the circuit components of the 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 ground and the lighting of the neon lamp (L2) will indicate the existence of tension in the line.

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

In Figure 4 an example is shown as an example. material embodiment of the switching box assembly (24), cable connection (26) with connection pin (25) and connection piece a ground (27) that also receives the connecting pin (28) cable connection (26).

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

Figure 5 shows the case schematically shown with numeral (7) in figure 1, in which the connection between the network and the switching box is done through the intermediate device (7) corresponding to the ground indicator and protective filter shown in figure 3, which has 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 ground indicator device and filter protector (7) presents its own plug will adopt the structure shown in figure 6, in which said device (7) is appreciated that has a standard plug housing (30) and that otherwise it is endowed with the same structure that has been represented in the Figure 3, showing the neon lamps (L1) and (L2).

In figures 7 and 8, an improved mat has been shown (31) usable in a computer, presenting a zone (32) of usual structure to those currently used to support a "mouse" or other device, having the characteristic that it is grounded through the conductor (33) with a resistor intermediate (34) of regulatory type, in accordance with this invention, and whose specific feature is the provision of an area (35) at the end of the mat (31) closest to the user, which has friction characteristics greatly reduced to effects of avoiding 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 user. 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 attached description and drawings explanatory, the present invention allows solving so easy and convenient both simple grounding in a safe way any household electronic device, such as a computer and its peripherals, likewise, simultaneously achieve protection Electromagnetic and grounding signaling function and tension.

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

Claims (8)

1. Switching device for earthing 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 grounding and electromagnetic protection for domestic electronic devices, according to claim 1, characterized in that the grounding device also has an internal filtering and protection circuit with externally visible light indicators of the grounding connection and of the existence of tension. 3. Switching device for grounding 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 is composed of two capacitors between which, with a resistor, the neon lamp indicating the grounding is connected, 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 spin balls inserted in the area of the mat immediately to the user. 8. Switching device for grounding 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 equipped 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.