FR2730355A1 - BUILT-IN ELECTRICAL EQUIPMENT - Google Patents

Abstract

The device comprises an insulating base (1, 1 ') carrying the connection or control elements, threaded sockets (14), diametrically opposed, serving to receive the fixing screws (7) of a support (3) arranged in front of the insulating base, having a central opening (9) from which start fixing arms (2) diametrically opposed and directed towards the inside of the insulating base (1, 1 '), with a straight section (4) and a perpendicular end section (5), which has a hole (6) aligning with the threaded sleeves (14). The support (3) is provided with fixing holes on a flush-mounting box (13). To prevent damage to the projecting parts, on the base (1; 1 ') are formed sliding guides (27, 30) adapted to cooperate with the arms (2) for the relative movement of the base with respect to the support (3).

Description

"Built-in electrical equipment" The invention relates to a

  built-in electrical equipment, in particular single or multiple socket, switch, dimmer or the like, with an insulating base or "mechanism" carrying the connection or control elements, this base having laterally diametrically opposite threaded sockets and locked in rotation, these sockets serving to receive fixing screws of a mounting ring (commonly called "support") disposed in front of the insulating base, with a central opening, from the edge of which protrude diametrically opposite fixing arms and directed towards the inside of the insulating base; these arms consist of a straight section and a perpendicular final section, which has a hole aligning with the threaded bushings; the mounting ring is provided with holes and / or oblong holes for fixing on a

  installation box surrounding the insulating base.

  It is customary for electrical equipment to be built in, that the fixing arms are rigidly connected to the tapped sockets of the insulating base, and for fixing the devices in a built-in box, spacers are provided, which support the internal walls of the box by screwing the fixing screws. Herein lies the danger of damaging the insulation of a conductor located between an internal wall and a spacer claw so that, if necessary, the mounting ring is found at mains voltage. The assembly of these materials is painful and takes time. We must also ensure that the mechanism is presented in an exactly aligned position, which, as practice shows,

is never reached.

  Rationalization measures are also incorporated with the prefabricated elements, during the manufacturing process, walls or plates of mounting element, if necessary, together with installation tubes or sleeves. Despite this, elements protruding out of the mounting ring, such as rocker switches, earth plugs, adjustment pins or the like, may be damaged during transport or storage.

  which involves expensive repair costs.

  The object of the invention is, for this reason, the creation of an electrical apparatus to be built-in, which can be installed in a built-in box integrated into a prefabricated element, so that no damage occurs to the parts protruding during transport or storage. This object is achieved according to the invention due to the fact that sliding guides for the fixing arms are formed on the insulating base in order to move the insulating base relative to the mounting ring, along the axis of the threaded bushings. In this way it is possible, by unscrewing the fixing screws as much as possible, that is to say, the fixing screws are still with a few threads in the tapped sockets 1 to 5 of the insulating base, to drive or push the insulating base as far back into the recess box, so that no part

  remains projecting towards the front of the insulating base outside the mounting ring.

  The insulating base can be fixed in this position, for example by means of easily removable adhesive tapes or flat screeds. At the mounting location, the insulating base can then simply - after removal of the fixing means - be brought forward to the operating position by completely screwing the fixing screws into the threaded sockets. By eliminating spreading claws, we can save on

costs and wasted time.

  It has proven advantageous to form the sliding guides with at least two guide surfaces, first and second, extending perpendicular to the plane of the mounting ring, and forming together an angle, preferably 90. With a sliding guide thus formed is made possible a sliding displacement of the insulating base, established

  with little friction, without risk of jamming.

  The particular advantage in this form of construction of a sliding guide is even greater when the first and second guide surfaces extend respectively parallel and perpendicular to the plane containing the axes of the threaded bushings. This guarantees that the insulating base is easy to locate

  mobile and kept in its exact position of use.

  Other preferred forms of construction of the sliding guide according to the invention are characterized in that the width of the straight sections of the fixing arms is greater than the width of the perpendicular end sections, where the first guide surfaces slide in contact with the lateral faces of the straight section and / or of the perpendicular end section of the fixing arms, these lateral faces extending in the lengthwise direction of the fixing arms, and o the second guide surfaces are adapted to cooperate with the lateral surface inside of the right section of the fixing arms and / or with the front face of the perpendicular end section of the fixing arms. By these measures, five construction variants are made possible which are simple to carry out with regard to construction. A first practical advantageous form of construction of a sliding guide is obtained from the fact that the first guide surfaces are formed by the faces of the wall of a prismatic cavity in the insulating base, and from the fact that the second guide surfaces are formed by the adjacent external lateral faces of the insulating base. This form of construction is particularly suitable for switches, since the insulating base then has a relatively large construction depth compared to other materials, a depth to which the

  switch rocker protruding from the mounting ring.

  A second preferred practical form of construction of a sliding guide consists in that, the first respectively second guide surfaces are formed by the lateral faces of two guide rods arranged on either side of each threaded sleeve and formed on the insulating base. This form of construction is particularly suitable for sockets, since these, apart from the earthing plugs protruding from the mounting ring, have a depth

  of relatively small construction.

  Furthermore, it has proved advantageous to have on the straight section of the fixing arms two projecting guide beams on a lateral face of this section and across the lengthwise direction of the

  attachment, on which the first guide surfaces can slide.

  By this additional support of the fixing arms on the first guide surfaces, the sliding character is improved and is again reduced the

  risk of jamming when moving the insulating base.

  The invention will moreover emerge from the description which follows as

  example with reference to the accompanying drawings o: - Figures la to show in simplified representation five forms of construction of the sliding guide provided by the object of the invention, which shows the basic arrangement, - Figure 2 is a exploded representation of an electrical built-in device according to the invention with two practical forms of construction of the insulating base, - Figure 3 is a detail, in a perspective view, of a fixing arm provided by the object of invention, - Figure 4 is an enlarged side view of a switch formed according to the invention, in the depressed position, and - Figure 5 is also a side view, according to Figure 4, of

  The switch in the use position.

  In the figures la_ to le, an insulating base made of plastic or ceramic, generally noted 1, o to obtain a better overall view, details such as connection terminals, plug contacts and setting contacts have been omitted. earth etc ... Arms for fixing a mounting crown 3 are noted by 2, these are made of sheet metal or plastic (see figure. 2). As is apparent from Figures 2 and 3, the fixing arms 2 consist of a straight section 4 and a perpendicular end section 5, with holes 6 for the reception of fixing screws 7. In this embodiment the width B of the straight section 4 is greater than the width b of the perpendicular end section 5. However, the width B of the straight section 4 can also, where appropriate, be equal to or less than the width b of the perpendicular final section 5. The fixing arms 2 start from the edge 8 of a central opening 9 of the mounting ring 3, which is provided with oblong holes 10 for the reception of fixing screws 11, which can be screwed into blind holes 12 d 'a recess box 13 surrounding the insulating base 1 respectively 1', in order to firmly connect the mounting ring to the recess box 13. The holes 6 of the perpendicular end sections 5 are aligned with threaded sockets 14, diametra Lately opposite, of the insulating base 1 respectively 1 ', as it emerges in FIG. 2, where the threaded sockets 14 are locked in rotation, for example by means of a square 15 formed on the threaded socket 14 at the end of this one, where the square 15 is housed by nesting in

  a cavity (not shown) of the insulating base 1 respectively 1 '.

  Returning to Figures 1a to 1a, Figure 1a shows a first form of construction of a sliding guide, which is formed on the one hand by horizontal guide surfaces 16 and 17 formed on the insulating base 1, which are adapted to sliding in contact with the upper and lower lateral surface 18 and 19 respectively of the perpendicular end section 5 of the fixing arms 2, and on the other hand is formed by vertical guide surfaces 20 and 21 formed on the insulating base 1, which are adapted to slide in contact with the internal lateral face 22

  of the straight section 4 of the fixing arms 2.

  In the second form of construction of a sliding guide according to FIG. 1b, this latter guide is formed on the one hand, once again, by the horizontal guide surfaces 16, 17, as in FIG. La, and on the other hand by vertical guide surfaces 20 ′, 21 ′ formed on the insulating base 1, these cooperating with the front face 23 of the section

perpendicular terminal 5.

  In the third form of construction of a sliding guide according to FIG. 1c, this latter guide is formed on the one hand by horizontal guide surfaces 16 ′, 17 ′ formed on the insulating base, these being adapted to cooperate with the upper and lower lateral face 24 and 25 respectively of the straight section 4, and on the other hand is formed by the vertical guide surfaces 20 ′, 21 ′, as in FIG. 1b. In the fourth form of construction of a sliding guide according to FIG. 1d, this latter guide is once again formed by the horizontal guide surfaces 16 ′, 17 ′, as in FIG. 1c, and on the other hand by the vertical guide surfaces 20, 21, as according to the

figure it.

  In the fifth form of construction of a sliding guide according to FIG. 1a, all of the horizontal and vertical guide surfaces, according to FIGS. 1a to 1d, are united in a single guide surface 26, this by what you get optimal guidance performance

  and sliding the sliding guide in the manner of a prismatic guide.

  Figure 2 shows two practical forms of construction of a sliding guide on the insulating base 1 respectively 1 '. On the insulating base 1 are formed in front of the threaded sockets 14 of the prismatic cavities 27, o the horizontal guide surfaces 16, 17 are formed, according to FIG. 1 a, by the lateral surfaces 28 of the prismatic cavity 27, and the guide surfaces 20, 21 are formed, according to FIG. 1 a, by the adjacent external lateral surfaces 29 of the insulating base 1. On the second insulating base 1 ′ shown are formed on either side of each threaded bush 14 of the guide rods 30 having a cross section of rectangular shape, of which lateral surfaces 31 and 32 respectively form, according to FIG. 1 a, the horizontal guide surfaces 16 respectively 17, as well as the guide surfaces

vertical 20 respectively 21.

  To improve the mobility of the insulating base 1, 1 'and to increase safety against jamming during movement, are provided, according to Figure 3, on the straight section 4 of the fixing arms 2, two guide beams 33 arranged spaced one on the other and erected across the lengthwise direction of the fixing arms 2, the upper lateral face and the lower lateral face respectively 34 and 35 forming additional bearing surfaces for the horizontal guide surfaces 16, 17, o the distance between the lateral surfaces 34, 35 is either, as in the example shown, equal to the width b of the terminal section

  perpendicular 5, or adjusted away from the guide surfaces 16, 17.

  Figures 4 and 5 show a switch 36, which has an insulating base 1, according to the form of construction shown in Figure 2, with a prismatic cavity 27. As shown in Figure 4, the insulating base 1 is in the depressed position corresponding to the loose fixing screws 7, so that the rocker of the switch 37 does not protrude from the mounting ring 3. FIG. 5 shows the position of use of the switch 36 where the fixing screws 7 are fully screwed down, so that the rocker switch 37 has become freely accessible, coming

  protruding out of the mounting crown.

  The guide surfaces presented in the figures, on the insulating base 1 respectively 1 ′, as well as the bearing surfaces on the fixing arms 2 are flat. It goes without saying that the guide surfaces as well as the bearing surfaces can be curved, for example in an arc of a circle or circular.

Claims (7)

Claims   1. Built-in electrical equipment, in particular single or multiple socket, switch, dimmer or the like, with an insulating base carrying the connection or control elements, and having on diametrically opposite sides tapped sockets locked in rotation used for receiving fixing screw of a mounting ring (said support), disposed in front of the insulating base, having a central opening, from the edge of which extend diametrically opposite fixing arms and extending towards the inside of the insulating base, these arms consisting of a straight section and o10 of a perpendicular end section, which has a hole aligning with the threaded bushings, o said mounting ring is provided with holes and / or oblong holes for fixing to a box of 'recess surrounding the insulating base, characterized in that, on the insulating base (1; 1') are formed sliding guides (16, 16 '; 17, 17'; 20, 20 '; 21, 21'; 26) p for the fixing arms (2) for the relative movement of the insulating base (1; 1 ') relative to the mounting ring (3), along the axis of the threaded bushings (14).   2. Built-in electrical equipment according to claim 1, characterized in that the sliding guides comprise at least two first (16, 17; 16 ', 17'; 26) and second (20, '; 21, 21') guide surfaces. ; 26) extending perpendicular to the plane of the crown   mounting (3), and forming an angle between them, preferably 90.   3. Built-in electrical equipment according to claim 2, characterized in that the first guide surfaces (16, 17; 16 ', 17'; 26) and the second guide surfaces (20, 20 '; 21, 21'; 26) extend respectively parallel and perpendicular to a plane   containing the axes of the threaded sockets (14).   4. Built-in electrical equipment according to claims 1 to 3,   characterized in that the width (B) of the straight section (4) of the fixing arms (2) is greater than the width (b) of the perpendicular end section (5), o the first guide surfaces (16, 16 '; 17, 17'; 26) are adapted to slide in contact, as desired, of the lateral faces (24, 25) of the straight section (4) and / or of the lateral faces (18, 19) of the perpendicular end section (5), these faces extending in the direction of the length of the fixing arms (2) and the second guide surfaces (20, 20 '; 21, 21'; 26) are adapted to slide in contact, as desired , optionally, internal lateral faces (22) of the straight section (4) of the fixing arms (2) and / or front faces (23) of the perpendicular end section (5) of the fixing arm (2).   5. Built-in electrical equipment according to claim 4, characterized in that, the first guide surfaces (16, 17, 26) are formed by the lateral faces (28) of the wall of a prismatic cavity (27) in the insulating base (1), and in that the second guide surfaces (20, 21) are formed by the adjacent external lateral faces (29) of the insulating base (1).   6. Built-in electrical equipment according to claim 4, characterized in that, the first respectively second guide surfaces (16, 17, 20, 21, 26) are formed by the lateral faces (31, 32) of two guide rods (30) arranged on either side of each socket   threaded (14) and formed on the insulating base (1 ').   7. Built-in electrical equipment according to one of claims 4 to   6, characterized in that, on the straight section (4) of the fixing arm (2) are arranged two guide crosspieces (33) erected at a distance from the lateral faces (24, 25) of this section (4) and across in the direction of the length of this section (4), the first guide surfaces (16, 17) being adapted to   slide in contact with the upper and lower faces of these crosspieces.