FR2837086A1 - Electrical household unit has connecting device for leading in current supply enclosed in an outer housing - Google Patents

Abstract

An electrical household unit has an external housing (1) having an opening (2) with a connecting device (3) between the current supply cable (13) and the internal cabling and a damage protection filter. The individual connections to the interior are made behind the aperture in the external plate through which the cable passes.

Description

i ti'nvention relates to an improved type of household appliance endowed

  a particular device capable of connecting the cable, which carries the electrical supply to the network, to the internal circuits of the device. we know household appliances, in particular dishwashers, which are used by

  example in the following description without however

  constitute a limitation for the application and the validity of the invention, in which the connection between the electrical network and the device itself is carried out, in addition to the conventional power cable, also by a specific device suitable for transport the electrical connections to said cable to

  various internal components of the device.

  The device is generally made up of: - a small metal bracket, which can be applied removably to the external structure, in particular the rear, of the household appliance, structure with which electrical contact is made, and a small plastic base that can be applied removably on said small square. In some cases, for example with a structure of the plastic device, said small square is eliminated and its function is assumed by said structure itself; - a lockable block, connected to said small base, preferably forming a whole with the latter; said cable clamp block being able to engage the power cable on said small base using known means, for example a screw; - a plurality of electrical contacts, at least trots, arranged on said small base; on said electrical contacts to be connected the various electrical connections, the line, the neutral and the earth, which run separately from said connection cable, downstream from said cable clamp block; - a terminal block, comprising a plurality of electrical contacts arranged by insertion on said small base and oriented towards the interior of the device; said electrical insertion contacts being connected, internally to said base, to the electrical contacts described above, on which the various electrical connection trots coming from said cable come into engagement; - a metallic element which electrically connects the electrical contact of said small base, on which is applied the earth connection with said small metallic bracket, if it exists, so as to ensure correct earthing of the device by means of the following connections: earth connection of the power cable,> said respective electrical contact on said base part,> said metal element between said electrical contact and said small bracket, the electrical contact between said small

  square and structure of the device.

  The various electrical circuits of the device are thus connected to said plurality of electrical insertion contacts which are arranged inside.

  audit terminal block, from where they are properly supplied.

  In particular, the noise filter is applied between three electrical contacts with suitable insertion

among these so-called contacts.

  It is easy to observe and it is quite obvious to a person skilled in the art that the configuration described is rather expensive, attempted from the point of view of the diversity than of the plurality of the components and of the work involved, than for the assembly costs associated with such components, not to mention the reduction in reliability resulting from such a complication of configuration; and there is finally another serious drawback to report and, precisely, the impossibility of dismantling from outside the noise filter which on the other hand requires a rather complicated operation by acting from inside the machine. In addition, replacing the power cable lo requires an operation which is not complex but which is such that it requires at least a period of a few minutes and the use of a screwdriver to perform the unscrewing and, in -quite, the tightening of the tightening screws which must fix the trots electrical connections of the cable, the line, the neutral and the earth, has respective contacts on the basic part. It would thus be desirable, and this is the aim of the present invention, to produce a household appliance having a device for inserting the power cable, which makes it possible to eliminate the drawbacks described and which thus makes it possible: - to eliminate the terminal block, - replace the noise filter from the outside, - and significantly reduce the

production costs.

  In addition, such a device must be easily achievable using existing technologies and must be able to be produced economically and be

easy to assemble.

  Such goals are achieved on a household appliance comprising an external piece of furniture, an electric power cable, a noise filter and a device for inserting the electrical connections to said cable into the internal wiring of the household appliance, according to the invention. characterized in that an external opening is formed on the external piece of furniture, in that said insertion device comprises a substantially flat external plate capable of being inserted outside of said opening, and allowing said cable to pass through. supply from the outside to the inside of said apparatus, and in that the various connections included in said power cable, wind likely to be connected, downstream to said passage from said plate external to said device, to the wiring circuits internal to said apparatus, said device being capable of being detachably blocked on said power cable and the connection of said various connection on the wiring of the household appliance

  being of the pressure insertion type.

  Said apparatus is provided with a noise filter, provided with three electrically separated terminals, in which each terminal has two respective contacts, capable of being used individually and each of said contacts of the same terminal being capable of being connected to means of insertion into a respective one of said connections, while each other contact of the same terminal is connected to the wiring to said household appliance. Said interference filter is capable of being removably engaged on the structure to said device, by means of an appropriate support and is detachable from said support

  by acting from outside said opening.

  Said power cable is capable of being blocked on said device by means of a cable fixing means, the latter independently comprising a fixing element, a locking element comprising a screw and a flexible peduncle, ensuring the union between the device and said element

of fixation.

  A plurality of said contacts on said interference filter is capable of being connected by

means of insertion under pressure.

  One edge of said outer plate is profiled with a protrusion, capable of allowing passage to said power cable, between the latter and an edge

of said opening.

  Said device is also capable of being inserted from the outside of said opening and of being inserted on said opening using suitable snap-on elements, preferably arranged on edges of said device or on edges of said opening. Other features and benefits

  will appear in the following description of a

  embodiment of the household appliance according to the invention given by way of nonlimiting example with regard to the accompanying drawings in which: - Figure 1 represents a rear perspective view of a household appliance equipped with a device insertion according to the invention, and an enlarged view, exploded, of the part in which said device is applied, - Figures 2a and 2b respectively represent a perspective view from inside the device according to the invention, separated of the piece of furniture and of the appliance and in FIG. 2b of an isolated component of the device, FIG. 3 represents a symbolic view of the insertion device according to the invention, before being assembled on the appliance, and of the part corresponding of the apparatus according to the sectional view along AA of FIG. 1, - Figure 4 shows the same view as FIG. 3, but after mounting the device on the back of the device, - Figure 5 shows the diagram of the electrical connections of a noise filter to be used with a device according to the invention, - Figure 6 shows a view in perspective of the interior area of a piece of furniture of a household appliance according to the invention, with a corresponding insertion and filtering device, after application. Referring to the figures, a household appliance according to the invention comprises an external cabinet 1 having an opening 2 in the part

lo lower of its external back.

  With reference to FIGS. 3 and 4, the insertion device 30 is profiled and dimensioned so that it can be inserted from the outside and applied in a stable manner, so as to close said opening 2 using known means, preferably snap-on elements 4, capable of engaging elastically on appropriate parts 5 of the edges of said opening 2; said elements snap type wind, such and well known to those skilled in the art, that they can also be removed from the outside, in order to be able to immediately and elementally move the device and, thus, access all of

inside the machine.

  Said device 30 is essentially constituted by an appreciably planar external plate 3, on the edge of which a protuberance 6 is profiled, emerging towards the exterior and progressively decreasing towards the center of the plate 3; as indicated in particular in FIGS. 1 to 3, between said protuberance and an edge of said opening being passed the power cable 13, and being provided, in its internal part with a means of fixing the cable 7 which can be opened, whose mode of realization

  preferd shown in Figure 3 will be described below.

  The suppressor filter 8 is provided with three electrically separated terminals, but each terminal having two contacts 9, 10, gA; lOA and 9B, lOB respectively, so that said filter has a total of six separate physical contacts / which can be used

  individually, as shown in Figure 6.

  The electrical circuit at said filter 8 is

  represented in FIG. 5, and with the description which

  was given, the mode of connection to said filter

  appears obvious to the man of art.

  With reference to FIG. 6, said filter 8 is connected to the interior of the apparatus by means of a suitable support 12, provided with a connection, so that it can be snapped in, as is clearly

illustrated in Figures 3 and 4.

  The power cable 13 includes the connection trots 14, 15 and 16, respectively of line, neutral and earth; these are terminated by respective insertion means, not being listed by numbers, capable of coming into engagement by insertion and, thus, by the mere pressure of the hand, with respective contacts placed on said filter 8. At this time , the mounting and the use of the invention will become obvious: above all, the interference filter is mounted inside the apparatus, as shown in Figures 3, 4 and 6; en-quite, an intermediate part of the power cable 13 is engaged on said insertion device 30, as shown in particular in FIGS. 2 and 6 and said cable is tightened on said device using said

cable fixing device 7.

  The conformation of the prominence 6, which emerges towards the outside on an edge to said device 30, internally generates a through opening, which makes it possible to pass the power cable 13 from the external zone to the electronic household appliance. internal zone thereof, in which said anti-parasite filter is accessible; en-quite, the connection trots 14, 15 and 16 of the wind power cable applied by a simple pressure of the respective means of insertion on the contact trots g, gA and

  gB separate correspondents of the anti-parasite filter.

  Naturally, the contacts 10, 10A and 10B of the wind filter are connected, with an analogous insertion method, to the wiring of the apparatus which, thus, is directly connected to the supply of the electrical network. Finally, the insertion device 30, in which the power cable is applied, is mounted on

  o opening 2, thus completing the apparatus.

  It is thus immediately obvious that the proposed solution presents a sensitive economy, tempted in terms of material than of labor and, moreover, that it is possible, by simplex maneuvers, presenting no risk or difficulty, replace the power cable, since it suffices to dismantle the insertion device 30, to disconnect it from the old cable by acting on the cable fixing means 7, to separate from the outside the trotting connections on the interference filter 8, to reconnect the trots of connections of the new power cable and to re-block said new cable 13 on said insertion device 30 using the appropriate cable fixing means 7; all this can be carried out in compliance with the safety standards in force, which require that the points placed under electric voltage

  are not accessible from the outside.

  With regard to the replacement of the suppressor filter 8, the operations to be carried out will be perfectly obvious to those skilled in the art and will not

  not the object of detailed description for this

  reason; it suffices only to remember that, in order to be able to replace the filter 8 from the outside, by acting through the opening 2, it will be necessary to ensure that said filter 8 is arranged substantially in front of the latter, said opening 2 must be sufficiently large and, in general, it will be necessary to ensure that the dimensions and the geometry of the organs concerned allow this substitution to be made. As far as the cable fixing means 7 is concerned, with particular reference to FIGS. 2A, 2B and 6, it is preferably made by an element of cable clamp 7A clean from the cab against the internal part of the device 30, by a fixing in this closed position, preferably using a screw 7B through said cable clamp element 7A and o said device 30 and, optionally, a flexible peduncle 7C placed between the plate 3 and said

cable clamp element 7A.

  The function of said peduncle is to ensure that the cable fixing means 7 cannot escape accidentally when it is temporarily pushed back; he is. in addition, it is preferable that the plate 3, the cable clamp element 7A and the peduncle 7C are made

  in one piece in a thermoplastic material.

Claims (12)

  1. Household appliance comprising an external cabinet (1), an electric power cable (13), a noise filter and a device for inserting the electrical connections to said cable into the internal wiring of the household appliance, characterized in that on the external piece (1) is formed with an opening (2), in that said insertion device (30) comprises an external plate (3) substantially flat, capable of being inserted outside said opening (2), lo and allowing the passage to said power cable (13) from the outside to the inside of said apparatus, and in that the different connections (14, 15 and 16), included in said power cable, are likely to be connected , downstream of said passage from said plate external to said device (30), to the wiring circuits internal to said apparatus. 2. Apparatus according to claim 1, characterized in that said device (30) is capable of being detachably blocked on said power cable (13).   3. Apparatus according to claim 1, characterized in that the connection of said different connections (14, 15, 16) to the wiring of the household appliance is of the pressure insertion type. 4. Apparatus according to claim 1, characterized in that it is provided with a noise filter (8), in that said noise filter is provided with three electrically separated terminals, in which each terminal has two contacts (9,) (9 ^, lOA) and (9B, lOB) respectively, capable of being used individually and in that each of said contacts of the same terminal is capable of being connected to insertion means at a respective one of said connections (14, 15, 16), while each other contact of the same terminal is   connects to the wiring to said household appliance.   5. Apparatus according to claim 4, characterized in that said interference filter (8) is capable of being engaged removably on the structure o said apparatus, by means of a support (12) suitable. 6. Apparatus according to claim 5, characterized in that said filter is detachable from said support (12) by acting from outside said opening (2).   7. Apparatus according to claim 1, characterized in that said power cable (13) is capable of being blocked on said device (30) by means of a fixing means (7) of the cable, the latter independently comprising a cable clamp element (7A), a blocking element and a flexible peduncle (7C), ensuring the union between the   device (30) and said cable clamp element (7A).   8. Apparatus according to claim 7, characterized in that said blocking element comprises a screw (7B).   9. Apparatus according to claim 4 characterized in that a plurality of said contacts on said interference filter (8) is capable of being   connected by pressurized insertion means.   10. Apparatus according to claim 1, characterized in that an edge of said external plate (3) is profiled with a protuberance (6), capable of allowing passage to said power cable (13), between the latter and an edge of said opening (2).   11. Apparatus according to claim 1, characterized in that said device (30) is also capable of being deposited   the exterior of said opening (2).   12. Apparatus according to claim 1, characterized in that said device (30) is capable of being inserted on said opening (2) by means of snap-fastening elements (4) suitable, preferably arranged on bards of said plate (3)