RU2391632C2 - Electric instrument with illumination - Google Patents

Abstract

FIELD: instrument making. ^ SUBSTANCE: electric instrument comprises driving mechanism installed with the possibility of rotation in socle for opening and closing of electric contacts arranged in socle, and means of illumination arranged with the possibility to illuminate front zone of instrument. At the same time means of illumination comprise source of light, which radiates light flow in direction of light diode arranged with the possibility to direct light source along rotary axis of driving mechanism. ^ EFFECT: possibility to generate light line or point on front part of instrument control key, and possibility to illuminate front zone of instrument facing panel with creation of halo on both sides from control key. ^ 27 cl, 19 dwg

Description

Technical field

The present invention generally relates to electrical devices containing any mechanism, for example, a switch or socket, installed in a box designed for indoor wall mounting, or in a housing designed for outdoor installation on such a wall.

In particular, it relates to an electrical device containing a drive mechanism mounted rotatably in the base for closing and opening electrical contacts located in the specified base, and illumination means configured to illuminate the front zone of the specified device.

The most preferred embodiment for applying the present invention is to provide an illuminated electrical switch in dark conditions.

State of the art

From the document GB 2083708, electrical devices of the aforementioned type are known having a backlight to facilitate their being in a dark room and / or to indicate an operating mode (on or off).

In these known electrical appliances, the illumination means comprise a light source (a diode or an incandescent lamp) mounted inside the housing of the device. This light source, electrically connected to the connecting contacts of the device mechanism, emits a light beam in the direction of the control key, accessible to the user, for direct or indirect illumination of the window made in front of the specified control key, and forming a light line or point on this key.

In an electrical appliance according to GB 2083708, the light source is laterally offset from the window of the illuminated control key. In this case, the illumination means comprise an optical fiber installed inside said control key, conductive light emitted by the light source, and directing it into the illuminated window.

In addition, US Pat. No. 4,710,858 describes an electrical appliance comprising a transparent control lever key that is classically illuminated from the back with a light source, wherein the control key comprises an opaque frame to prevent light from coming out between the specified key and the edge of the mounting hole for mounting the key. According to this document, it is also envisaged that the lever means of the key, the light guide and the opaque section filled with foam material be implemented so that the light emitted by the light source can be directed to the rear side of the key without any “leaks” on the side during the lever switching of the key.

DE 202004003530 U1 describes an electrical appliance comprising two lever keys. Each lever key is associated with a light source illuminating the light guide, fixedly connected to the key and containing, on the one hand, an end part extending to the center of the key with the possibility of forming a central light zone on the front of this key, and, on the other hand, a tip located at the back of the key and designed to actuate the switch that controls the light source.

Finally, documents GB 2083708 and FR 2045846 describe lever switches of the same type, in which a light source is provided that is offset from the rotary axis of the lever button and a light guide configured to direct the light emitted from the source to the facade part (see GB 2083708) or on the side (FR 2045846) of the specified key.

Disclosure of invention

In contrast to the above references, the present invention proposes a new solution for implementing illumination means for an electric device, which allows either to form a light line or a point on the front of the control key of the device, or to illuminate the front areas of the cladding panel with the possibility of creating a halo of light on both sides of the control key.

In particular, an electric device in accordance with the present invention comprises a drive mechanism mounted rotatably in the base for opening and closing electrical contacts located in the specified base, and illumination means configured to illuminate the front area of the device. It is characterized in that said illumination means comprise a light source emitting a luminous flux in the direction of the light guide configured to direct this luminous flux along the rotary axis of the drive mechanism.

An electrical appliance in accordance with the present invention is also characterized by the following preferred and non-limiting features:

- the optical fiber is included in the design of the drive mechanism;

- the light guide includes two support journals for mounting the drive mechanism with the possibility of rotation in the base;

- the drive mechanism is made in the form of a cradle, the bottom of which is surrounded by a peripheral side wall and which is designed to install the backlight, while the light guide includes at least a portion of the bottom of the drive mechanism;

- the fiber is made of a transparent or translucent material;

- the device contains at least one optical channel configured to pass a light stream directed along the rotary axis up to the front zone of the device;

- each optical channel contains at least one end for the entrance of the light flux located on the rotary axis near the supporting rotary neck of the drive mechanism; at least one part directing the light flux enveloping the drive mechanism; and a part scattering the light flux and made along the illuminated front part;

- the optical channel contains two ends for the entrance of the light flux located on both sides of the drive mechanism; two guide parts made from the indicated input ends, which envelope the drive mechanism and are connected to the two ends of the scattering part passing along the illuminated front part;

- each input end of the optical channel is located between the lateral peripheral wall of the drive mechanism and the inner end of the support rotary neck of the drive mechanism;

- the device contains a control key, accessible to the user, mounted on the drive mechanism to rotate it, and this control key contains an elongated window opposite the scattering part of the optical channel;

- each optical channel contains at least one end for the entrance of the light flux located on the rotary axis of the drive mechanism near the support rotary neck, and a part that diffuses light, which is made on the side of the drive mechanism opposite the surface of the illuminated front area;

- the scattering part is fan-shaped;

- the scattering part contains strips for scattering the light flux over the illuminated surface;

- there are two optical channels located on both sides of the drive mechanism to illuminate the two lateral front zones of the electrical device;

- the device contains two drive mechanisms located next to each other, actuated by two control keys available to the user, while the illumination means comprise a light source and a light guide associated with each drive mechanism, with each light guide configured to direct the light flux emitted by the light source along the rotary axis of the corresponding drive mechanism, while at least one of the keys contains an opaque wall, made with the possibility of overlapping luminous flux passing between two drive mechanisms along the rotary axis of the drive mechanisms;

- each control key associated with one drive mechanism contains an opaque wall;

- each opaque wall is located between the peripheral side wall of the drive mechanism and its supporting rotary neck;

- each opaque wall is made in one piece with a control key;

- the illumination means comprise a base, on the side of which, facing the bottom of the electric device, a printed circuit is installed, to which electroluminescent diodes are connected, forming a light source;

- on the side facing the front of the electrical appliance, the base comprises a printed circuit to which at least one second diode is connected, forming a second light source;

- a drive mechanism made of transparent or translucent material forms a light guide configured to pick up the light flux emitted by the second light source and direct it towards the front zone of the illuminated electrical device;

- the device contains a second optical channel, configured to capture at least part of the light flux emitted by the second light source and guided by the drive mechanism, and directing it to the illuminated front zone;

- the second optical channel, made in the form of a T-shaped channel, contains a guide part located opposite the drive mechanism for capturing the light flux guided by the drive mechanism, and a diffusing part passing along the illuminated front zone;

- the device contains a control key, accessible to the user, mounted on the drive mechanism to rotate it, while the control key contains an elongated window, opposite the scattering part of the optical channel directing the light flux emitted by the second light source;

- each drive mechanism is performed in the form of a single part by molding from a transparent or translucent plastic material;

- each optical channel is made in the form of one part by molding from a transparent or translucent plastic material.

Brief Description of the Drawings

The present invention will be more apparent from the following description, given by way of non-limiting example, with reference to the accompanying drawings, in which:

figure 1 is a schematic view in parsing in perspective of part of an electrical device in accordance with the present invention;

figure 2 is a schematic bottom view in perspective of a cartridge included in the backlight of the electrical device shown in figure 1;

figure 3 is a schematic perspective view of the drive mechanism of the electrical device shown in figure 1;

4 is a schematic perspective view in section along the Central plane of the drive mechanism shown in figure 3;

FIG. 5 is a schematic perspective view of a drive mechanism shown in FIG. 3 comprising a light guide; FIG.

Fig.6 is a schematic perspective view in section along the central plane of the drive mechanism shown in Fig.5, on which the control key of the electric device shown in Fig.1;

FIG. 7 is a schematic perspective view of an assembly of the electrical apparatus shown in FIG. 1 containing the optical channel shown in FIG. 5;

Fig.8 is a top view of the electric device shown in Fig.7;

Fig.9 is a schematic perspective view from below of the electric device shown in Fig.7, on which the control key is installed;

figure 10 is a schematic perspective view in parsing of an embodiment of the electrical device shown in figure 9;

11 and 12 is a partial schematic perspective view in section of another embodiment of the electrical device shown in Fig;

FIG. 13 is a schematic perspective view of another embodiment of an electrical apparatus in accordance with the present invention; FIG.

Fig.14 is a view similar to Fig.13, without a control key;

FIG. 15 is a schematic perspective view of a drive mechanism and optical channels of the electrical apparatus shown in FIG. 14;

Fig.16 is a bottom view of the mechanism shown in Fig.15;

Fig.17 is a view identical to Fig.15, in section along the X axis;

Fig. 18 is a schematic perspective view of two adjacent adjacent drive mechanisms equipped with an optical channel according to another embodiment of an electric device in accordance with the present invention;

Fig. 19 is a partial schematic cross-sectional view along the central plane of an electric device containing drive mechanisms and optical channels shown in Fig. 18.

The implementation of the invention

First of all, it should be pointed out that in different figures identical or similar elements of the various embodiments of the invention presented are indicated by the same positions as far as possible and their description is not repeated.

Figure 1-9 shows an electrical device containing a single-module base 100, designed to install the device in a socket not shown in the drawings.

The cap 100, made in the form of a single part by molding from a plastic material, contains an electrical mechanism (not shown in the figures) of an electrical device.

It can be a switch or a switch.

On the back side (see Fig. 9), the base 100 comprises openings 120 for access to the electrical connection terminals of the device mechanism installed in the base. In addition, it contains on two opposite side sides of the tabs 110, provided with a latch 111 for mounting the cap 100 by snapping into the corresponding socket of the device. On the front side it contains a side 101, 112, based on the corresponding socket of the device.

As is known, an electric device comprises a drive mechanism 200 mounted rotatably around the X axis in the base 100 to open or close the electrical contacts of the device mechanism installed in the specified base 100.

The electrical appliance also comprises illumination means adapted to illuminate the front zone of said appliance.

According to the exemplary embodiment shown in FIGS. 1-9, said illumination means is configured to form a light line on a front portion 300A of a control key 300 of an electrical appliance (see FIG. 6).

A user-accessible control key 300 is latched onto the drive mechanism to rotate it about the rotary axis X.

Preferably, these illumination means comprise a light source 403 emitting a light flux in the direction of the light guide 202A, 204 configured to direct this light flux along the rotary axis X of said drive mechanism 200.

As shown in FIG. 2, the light source in this case contains four electroluminescent diodes 403 mounted side by side at the four corners of the rectangle and connected to a printed circuit installed on the rear side of the board 404, covered by an insulating casing 401, forming a cassette 400. Of course, the insulating the housing 401 does not cover the indicated electroluminescent diodes 403, which are visible on the rear side of the cartridge 400 through the window 402 of the specified housing. Electrical power is supplied to the printed circuit through contact terminals 405 protruding from the insulating sheath 401 for connection to the connecting contacts of the device mechanism contained in the cap 100.

As shown, in particular, in FIGS. 3 and 4, according to the presented example, the drive mechanism 200 is made in the form of a cradle having a generally rectangular shape and containing a bottom 202 surrounded by a peripheral side wall 201 defining a socket 200A, open towards the front of the electric instrument.

The drive mechanism is mounted to rotate in the eyes 130 of the base 100 with two support necks 204 mounted on both sides of the peripheral side wall 201 along the rotary axis X.

On the outside, the peripheral side wall 201 includes latches 201A for installation by snap-fitting the control key 300.

Along two lateral sides parallel to the peripheral side wall 201, the drive mechanism 200 comprises shelves 203 fixedly connected to the rotatable support necks 204 of the drive mechanism 200. At the level of the support necks 204, these shelves contain cutouts, therefore, the drive mechanism 200 contains two empty spaces 205 between the side peripheral wall 201 and two support journals 204.

The cassette 400 is installed in the cradle so that its back side, on which the indicated electroluminescent diodes 403 are mounted, faces the bottom of the cradle 202 and that its front side, in the form of an insulating casing 401, faces the front side of the device, i.e., its 300 control key.

The bottom 202 of the cradle formed by the drive mechanism 200 contains holes through which the contact pins 405 of the cartridge 400 installed in the cradle pass so that these pins can be connected to the connecting contacts of the device mechanism made on the bottom of the cap 100.

In this case, the light guide configured to direct the light flux emitted by the light source of the illumination means along the rotary axis of the drive mechanism is included in the drive mechanism 200.

In particular, this light guide comprises at least a portion 202A of the bottom 202 of the drive mechanism 200.

For this, the drive mechanism 200 is made of a transparent plastic material, such as transparent polycarbonate or transparent methyl acrylonitrile polymethacrylate. Preferably, it is performed as a single part by molding from a transparent plastic material.

When the cassette 400 is installed in the drive mechanism 200, the electroluminescent diodes 403 are located opposite the portion 202A of the bottom 202 of the cradle forming the light guide. The luminous flux emitted by the electroluminescent diodes 403 is directed by the bottom 202A of the cradle along the arrows F (see FIGS. 4 and 6) in the direction of the pivoting journals 204 of the drive mechanism 200.

In addition, as shown, in particular, in FIGS. 5-9, the presented device comprises an optical channel 500 configured to pass a light stream directed by the bottom 202A of the drive mechanism 200 along its pivot axis X and extending to an elongated window 302 made in of the front part 300A of the electric device control key 300.

In this case, as shown, in particular, in FIGS. 5 and 6, the optical channel 500 made by molding from a transparent plastic material has a shape corresponding to the square shape of the control key 300, called a two-module key. It passes along a contour having a generally trapezoidal shape and extending beyond the dimensions of the cap 100. It contains two ends 501A, 502A of the entrance of the light flux located on both sides of the drive mechanism 200 on the indicated rotary axis X. Each of these ends 501A, 502A is inserted into one of the empty spaces 205, located between the side peripheral wall 204 of the cradle and the inner end of the rotary support neck 204.

Starting from these input ends 501A, 502A, the optical channel 500 contains two parts 501, 502 directing the light flux that envelope (one on the left and the other on the right) peripheral side wall 201 of the drive mechanism 200 and are connected to the diffusing part 503 located in the specified illuminated elongated window 302.

The optical channel 500 is a continuous channel made in the form of a single part by molding from a transparent plastic material, the same as, for example, the material of the drive mechanism 200.

Thus, as shown, in particular, in FIG. 6, the main part of the light flux emitted by the electroluminescent diodes 403 towards the bottom of the cap 100 passes along part 202A of the bottom 202 of the drive mechanism 200 and is directed along the arrows F along the rotary axis X of the drive mechanism, then it passes through the optical channel 500 and is directed to the scattering part 503 of this channel, forming a light line on the front part 301 of the control key 300 of the electrical device.

Preferably, as shown in FIG. 9, on its rear side 300B, the control key 300 includes protrusions 301 holding the optical channel 500 mounted on the drive mechanism 200 of the device.

Figure 10 shows an embodiment of the device shown in figure 1, according to which the optical channel 500 'has a U-shape corresponding to a single-module rectangular control key 300', called the piano key.

It is adjacent to the drive mechanism 200 in such a way that it fits into the size of the cap 100. The ends 501'A, 502'A of the guide parts 501 'and 502' are located on the rotary axis X on both sides of the drive mechanism 200 outside the rotary support journals. The scattering part 503 ′ of the optical channel 500 ′ is shorter, since it extends only across the width of the cap 100.

11 and 12 show another embodiment of the electric device shown in figure 1, according to which the drive mechanism 200 ', mounted to rotate on the base of the device mechanism not shown, also forms a cradle open towards the bottom of the base, containing the bottom 202' and a peripheral side wall 201 ′ defining a slot for mounting a board 404 ′, on the front side and on the back side of which a printed circuit is formed.

On the one hand, two electroluminescent diodes are provided on the rear side of the circuit board 404 ', connected to the printed circuit and mounted opposite the support necks of the drive mechanism 200' for generating light flux along the rotary axis X of the drive mechanism 200 ', and, on the other hand, on the front side boards 404 'facing the control key 300, install two other electroluminescent diodes 403', facing the bottom 202 'of the drive mechanism 200'.

The bottom 202 'of the drive mechanism 200' forms a light guide directing the light flux emitted by these electroluminescent diodes 403 'to the optical channel 500' 'of a T-shape containing a guide portion 501' 'located opposite the drive mechanism 200' to pass the light guided by it flow, and a head 502 '', which acts as a scattering part, made in the elongated window 302 of the illuminated control key.

FIGS. 13-17 show another embodiment of the electric device shown in FIG. 1, in which optical channels 610, 620 are arranged on either side of the drive mechanism 200 opposite its supporting pivoting necks, configured to illuminate the facing parts 701, 702 a panel 700 mounted around the control key 300 ″ and latched onto the drive mechanism to create a halo of light on both sides of the control key.

As shown in particular in FIGS. 14-17, each optical channel 610, 620 is relatively flat. It contains an input end 611, 621 on the rotary axis X opposite each rotary support neck 204 of the drive mechanism 200 for the passage of the light flux emitted by electroluminescent diodes 403 in the direction of the bottom of the base 100 and guided by the bottom 202A of the drive mechanism 200 and the corresponding support neck 204. In addition, in continuation of its inlet end 611, 621, it comprises a light diffusing part 612, 622 and formed on the side of the drive mechanism 100 opposite the surface 701, 702 of the illuminated front area of the cladding panel 700.

In this case, the scattering part 612, 622 of each optical channel 610, 620 basically has a fan-shaped or angular sector shape and contains strips 612A, 622A on its rear side for scattering the light flux passing through the specified channel.

Each optical channel 610, 620 also contains strips for scattering and reflection of light in its area.

Each optical channel 610, 620 is a continuous channel made in the form of a single part of a transparent plastic material, similar to the optical channels 500, 500 '.

In this case, as shown, in particular, in Fig. 17, the light flux emitted by the electroluminescent diodes towards the base of the base passes through part 202A of the bottom 202 of the drive mechanism 200 and is directed along the rotary axis X of the drive mechanism, while part of this light flux passes through an empty space 205 located between the peripheral side wall 201 of the drive mechanism 200 and the corresponding support neck 204 so as to be guided by the support neck 204 to the corresponding input end 611, 621 of the optical about the channel 610, 620 and scattered by its corresponding fan-shaped scattering part 612, 622 on the front of the cladding panel.

FIGS. 18 and 19 show an embodiment of the electric device shown in FIGS. 13-17, according to which two drive mechanisms 200 are provided, identical to the drive mechanism described with reference to FIGS. 1 to 9, mounted next to each other and driven action with two 300 ”control keys available to the user. Drive mechanisms 200 rotate about the same rotary axis X.

In this case, the backlight of the electric device also contains a cartridge 400, similar to the cartridge shown in figure 2, installed in each drive mechanism 200.

In addition, from the side of the support journals 204 located outside two adjacent drive mechanisms 200, opposite the illuminated surface of the cladding panel, optical channels 610 ', 620' having a fan-shaped or crescent shape are made. Each optical channel 610 ', 620' contains a wall 611 ', 621' located opposite the outer end of the corresponding support rotary neck for the passage of light guided by this support neck. Each optical channel 610 ', 620' is configured to scatter light on a corresponding side surface of the cladding panel spanning the control keys 300 ''.

The optical channels 610 ', 620' are solid channels made in one piece by molding from a transparent plastic material.

Preferably, according to this embodiment, at least one of the control keys 300 ″ comprises an opaque wall 310 ″ configured to block the luminous flux propagating between the two drive mechanisms 200 along their rotary axis X.

In this case, each control key 300 ″ comprises an opaque wall 310 ″ located between the peripheral side wall 201 of said drive mechanism 200 and its inner supporting pivoting neck 204 and blocking the luminous flux propagating between them.

Each opaque wall 310 ″ is made in one piece with a corresponding control key 300 ″.

Thus, the passage of the luminous flux illuminating only the lateral parts of the cladding panel located on both sides of the dual control keys 300 '' is provided, creating a luminous halo around these keys.

Preferably, in the electric device in accordance with the present invention, by attaching a corresponding optical channel to the drive mechanism 200, light emitted by the light source can be directed to the front side of the control key to form a light line thereon or to diffuse this light on the front of the cladding panel on both sides from the specified control key.

The present invention is by no means limited to the embodiments described and shown in the drawings, and a specialist can make any variations therein.

Claims (27)

1. An electrical appliance comprising a drive mechanism (200) mounted rotatably in the base (100) for opening and closing electrical contacts made in the base, and illumination means configured to illuminate the front zone of the device, characterized in that the illumination means contain a light source emitting a light flux in the direction of the light guide (202A, 204), configured to direct the light flux along the rotary axis (X) of the drive mechanism. 2. An electric device according to claim 1, characterized in that the light guide (202A, 204) is included in the design of the drive mechanism (200). 3. An electric device according to one of claims 1 or 2, characterized in that the light guide comprises support necks (204) for mounting the drive mechanism (200) with the possibility of rotation in the base (100). 4. An electric device according to claim 1, characterized in that the drive mechanism is made in the form of a cradle, the bottom (202) of which is surrounded by a peripheral side wall (201), which is designed to install the backlight, while the light guide includes at least a part (202A) bottom (202) of the drive mechanism. 5. The electric device according to claim 1, characterized in that the light guide is made of a transparent or translucent material. 6. An electric device according to claim 1, characterized in that it comprises at least one optical channel (500) configured to pick up the light flux directed along the rotary axis (X) and direct it up to the front zone of the device. 7. An electric device according to claim 6, characterized in that each optical channel (500) contains at least one end (501A, 502A) for the input of the light flux located on the rotary axis (X) near the supporting rotary neck (204 ) a drive mechanism, at least one part (501, 502) directing the light flux and the envelope of the drive mechanism (200), and a part (503) diffusing the light flux made along the illuminated front zone. 8. An electric device according to claim 7, characterized in that the optical channel (500) contains two ends (501A, 502A) for the entrance of the light flux located on both sides of the drive mechanism, two guide parts (501, 502) made from input ends enveloping the drive mechanism and connected to two ends of the scattering part (503) extending along the illuminated front zone. 9. An electrical device according to one of claims 7 or 8, characterized in that each input end (501'A, 502'A) of the optical channel is located outside the support rotary neck (204) of the drive mechanism. 10. An electrical device according to one of claims 7 or 8, characterized in that each input end (501'A, 502'A) of the optical channel is located between the peripheral side wall (201) of the drive mechanism and the inner end of the support rotary neck (204) drive mechanism. 11. An electrical appliance according to claim 7, characterized in that it contains a control key (300) accessible to the user, mounted on the drive mechanism to rotate it, and the control key comprises an elongated window (302), made opposite the scattering part (500) of the optical channel (500). 12. The electric device according to claim 6, characterized in that each optical channel (610, 620; 610 ', 620') contains at least one end (611, 621; 611 ', 621') for the input of the light flux located on the rotary axis near the support rotary neck of the drive mechanism, and the part (612, 622) that scatters the light, which is made on the side of the drive mechanism opposite the surface of the illuminated front zone. 13. An electric device according to claim 12, characterized in that the scattering part (612, 622) has a fan-shaped shape. 14. An electric device according to one of claims 12 or 13, characterized in that the scattering part comprises strips (612A, 622A) for scattering the light flux over the illuminated surface. 15. The electric device according to claim 12, characterized in that it comprises two optical channels (610, 620; 610 ', 620') located on both sides of the drive mechanism for illuminating the two side front zones of the electric device. 16. An electrical appliance according to claim 1, characterized in that it contains two drive mechanisms (200) located next to each other, actuated by two control keys (300 '') accessible to the user, while the illumination means comprise a light source and a light guide associated with each drive mechanism, each light guide configured to direct the light flux emitted by the light source along the rotary axis of the corresponding drive mechanism, wherein at least one of the control keys contains opaque wall (310 '') adapted to overlap light flux passing between the two drive mechanisms along the pivot axis of said drivers. 17. An electrical appliance according to claim 16, wherein each control key (300 ″) associated with one drive mechanism comprises an opaque wall (310 ″). 18. An electrical appliance according to one of claims 16 or 17, characterized in that each opaque wall (310 ″) is located between the peripheral side wall (201) of the drive mechanism and its supporting rotary neck (204). 19. An electrical appliance according to claim 16, characterized in that each opaque wall (310 ″) is made in one piece with the control key (300 ″). 20. An electric device according to claim 1, characterized in that the illumination means comprise a base (404), on the side of which, facing the bottom of the electric device, a printed circuit is installed, to which electroluminescent diodes (403) are connected, forming a light source. 21. The electric device according to claim 20, characterized in that on the base side facing the front of the electric device, there is a printed circuit connected to at least one second diode forming a second light source. 22. The electric device according to item 21, wherein the drive mechanism made of a transparent or translucent material forms a light guide configured to pick up the light flux emitted by the second light source and direct it to the illuminated front area of the electric device. 23. The electrical appliance according to claim 22, characterized in that it comprises a second optical channel (500 ″) configured to capture at least a portion of the light flux emitted by the second light source and guided by the drive mechanism and direct it into the illuminated front zone. 24. The electric device according to item 23, wherein the second optical channel, made in the form of a T-shaped channel, contains a guide part (501 ''), located opposite the drive mechanism, to capture the light flux directed by the drive mechanism and the diffusing part ( 502 '') extending along the illuminated front zone. 25. An electrical appliance according to one of claims 20-24, characterized in that it comprises a control key (300) accessible to the user, mounted on the drive mechanism to rotate it, while the control key comprises an elongated window (302), opposite the scattering parts of the optical channel (500 '') directing the light flux emitted by the second light source. 26. The electric device according to claim 1, characterized in that each drive mechanism is made in the form of a single part by molding from a transparent or translucent plastic material. 27. The electric device according to claim 1, characterized in that each optical channel is made in the form of one part by molding from a transparent or translucent plastic material.

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