FR2515783A1 - Photo-flash unit with horizontal lamp array - has lamps received within foldable housing parts and powered via housing terminal - Google Patents

Abstract

The photoflash unit comprises a horizontal linear array of flashlamps enclosed within a one-piece housing having a light-transmitting front folded over a back portion contg. multiple lamp-receiving cavities. The housing is a formed sheet of plastics film having a linear fold horizontal along the top of the array of cavities, which are selectively aluminised to provide a reflective coating on the cavity surfaces. A pair of lead-in wires from each of the lamps are connected to conductive circuit patterns on one side of a printed circuit board sandwiched between a set of tabs which run along the bottom of the front and back portions of the housing and are secured together. The sides of the housing are also secured so that the lamps, lead-in wires and connections are disposed within a secured enclosure, with conductive connector terminals disposed on a tab which projects from the printed circuit board and extends exteriorly of the secured enclosure.

Description

HOUSING FOR LIGHTING LAMP FOR PHOTOGRAPHIC USE
The present invention relates to devices including flash lamps for photographic use and, more particularly, such small and cost-effective devices, the housing of which includes a plurality of lamps.

 We already knew this type of device for flashlights for photographic use in a cubic or parallelepipedal form, and formed of at least two separate parts assembled one after the other so as to constitute a housing fexmé.

For example, the US patents 3,327,105 and 3,730,669 describe a device of cubic shape, while the American patent 3,857,667 relates to a device of parallelepiped shape. Generally, they are equipped with a plurality of lamps associated with reflectors placed on a support flush with the horizontal and enclosed under a transparent cubic or parallelepipedic cover which is fixed all around the support by heat sealing c @ à ultra- sounds. In bidirectional devices of parallelepiped shape, the lumps feel in contect with a printed card lying on another support. Unidirectional devices of parallelepiped shape described for example in American patent 3,473,280 contain lamps connected to a printed map back of the housing and includes reflective cavities. To protect the lamps, the transparent uns @euille device is attached separately to the front of the device. The printed circuits and the terminals are provided on either side at the rear of this part and one of the conducting wires of each lamp passes through an opening made in the reflective cavity to be connected to the printed circuit outside. of the rear part of the housing. American patent 3,430,545 relates to a housing of this kind.
The US patents 3,894,226 and 4,017,728 relate to devices of parallelepipedal shape, the housing of which consists of a cover and a plastic bottom intended to be made integral. The cover is a rectangular cavity, while the rear part is of substantially a / platis shape.

Between these two parts, there are successively a plurality of lamps, a reflective sheet, a sheet of insulating material, a card on one side of which is printed an electrical circuit to which the lamps are connected, and an information sheet. Such a type of device enclosing a larger number of lamps is described in American patent 4 164 007.

 Another type of device with a parallelepiped shape is described in US Patent 3,608,451. According to the latter, a card without protection is provided with a base on its lower edge and comprises a printed circuit to which the lamps are connected, a flat sheet. reflective being placed on a surface of the card. No housing is described in this patent.

The device described in American patent 3,598,985 (Fig. 6) is of the bi-directional type and combines a printed card and a wavy reflector. In FIGS. 7 and 8 of this same patent, it can be seen that the base is folded in its middle part so as to make the device bi-directional * The housing then separately comprises a base and a transparent cover similar to those described in American patent 3 857 6670
In US Patent 4,245,280, a small and inexpensive device has been described consisting of a vertical row of flashlights attached to a printed card in the longitudinal channel of the rear part of a piped parallel shoemaker. . A transparent cover is attached to the front of the case to enclose the lamps. To make the structure rigid, the cover has rectangular corner posts at each end and a transverse membrane in the center which penetrates into slots provided for this purpose in the case, the membrane then being welded to the case by ultrasound. longitudinal walls are fixed by means of a plurality of cylindrical uprights provided along each csstE of the cover, and which are introduced into orifices provided in the case, thus forming rivets at their end which is heated and sealed by ultrasound- .

 The present invention relates to a device of this type, but simpler and less expensive than known devices, having better resistance and the possibility of containing a larger number of lamps. According to this object, the device must have a low cost per lamp, and must be equipped with a bootmaker of easy and comparatively simple manufacture.

 According to the invention, the case of this device consists of a single piece folded on itself, the front part of which is transparent and the rear part molded so as to present a plurality of receptacles for the lamps. Each of the lamps is arranged in a cavity and the front part is used to form the assembly. Terminals provided on the case are connected to the lamps so as to allow the formation of lightning in response to the control signals applied to these terminals.

 The shoemaker preferably consists of a plastic sheet used longitudinally, at the rear of which cavities are molded so as to allow the placement of the lampas. A rectilinear fold defines the rear and front parts of the shoemaker. It is planned horizontally along. of the boot lid. Means, for example adhesive, are provided for securing the cover to the rear part, on the sides and in aces of the shoemaker, so as to enclose the lamps in an enclosed space.

A reflective coating is deposited on the surface of the cavities where the st lamps are arranged, preferably this coating is obtained by metallization of the housing so that all the surfaces of the cavities facing the lamps are covered with it.

The cover and the parts ensuring the closing of the case are not metallized.

 According to one embodiment of the invention, the terminals of the positive device are connected to a card on one side of which an electrical circuit is printed and where the lamps are connected. Each lamp has two electrically conductive wires connected to certain appropriate points on the printed circuit. The side edge of the circuit board extends below the molded case. All the contact areas of the circuit are arranged on the same side of the card. Thanks to this arrangement, it is not necessary to place eyelets or rivets to ensure the connections, the conducting wires of the lamps being able to be directly connected to the contact zones on the card, which prevents them from being introduced into openings. practiced for this purpose in the rear part of the cavities. The printed card, substantially rectangular, has an extension projecting on one of the sides and on which the conductors terminate.

 According to one embodiment, this extension is much smaller than the longest category of the card, but according to another iodle, it is wider than the card.

 According to one embodiment of the invention, the rear part of the plastic case includes a first overhang which extends under the cavities where the lamps are arranged, while the front part includes a transparent part facing the lamps and a second overhang which extends under this transparent part. When the case is closed, part of the printed card is pinched between the two overhangs of the case, while the extension of the protruding card emerges outside and at the bottom of the case.

 According to another embodiment, the circuit is directly printed on the case, and it is not necessary to add a printed card. More precisely, the electrical circuit is printed on the first overhang of the rear part of the box. The conducting wires of the lamps are then connected to the connection points provided on this overhang inside the case. The lower wall of this overhang at the rear part of the shoemaker has an electrical part which extends under the front part of the shoemaker, all the contact zones being provided on a single side of this first overhang.

 The sidewalls and the top of the cavities are substantially in abutment against the transparent part of the front part, which determines individual receptacles for the lamps.

 A space at the bottom of each cavity allows the conductor wires of the lamps to pass to the electrical circuit located inside the case.

 The use of a single sheet folded above the reflecting part and forming a shoemaker has many advantages.

In particular, the total height of the device can be further reduced by the fact that there are no sealing lips at the top. In addition, the amount of plastic used decreases. The presence of a fold increases the longitudinal rigidity of the device as well as the resistance of the shoemaker relative to a case having a seal at its top. The use of a box in a single element avoids the manipulation of several parts to be assembled at the time of manufacture, which, for example, contributes to lowering production prices.

 The invention will be better understood and from other objects, advantages and characteristics thereof will appear more clearly on reading the description which follows, to which three sheets of drawings are appended.

 Figure 1 is a perspective view and partially @ exploded @ of a flashlight device according to a first embodiment of the invention.

 Figure 2 is an enlarged view @ and @n shot according to 2-2 of Figure 1.

Figure 3 is a perspective view before folding of the box of Figure 1, the printed board being highlighted to show the electrical circuit, the lamp @ @ 'not being shown
FIG. 4 is an exploded perspective view of a folding box facing the mask used to metallize the walls of the reflecting cavities.

 FIG. 5 represents, in perspective, @vant plioge, a box according to another embodiment of the invention, according to which the electric circuit is directly printed on a part of the box, the lamps not being @@ presented.

FIG. 6 is a sectional view of the device shown in FIG. 5, and
Figure 7 shows in perspective a device according to another embodiment of the invention.

 With reference now to FIGS. 1 and 2 in which a device for flashing lamps for photographic use is shown than 10 according to a first embodiment of the invention, this device comprises a horizontal row of five flashing lamps 11-15, connected to a printed circuit on the card 16. Each lamp has two conductive wires lla, llb, etc., connected to the circuit on the card 16. For example, the conductive wires lla, llb, etc., can be soldered to the respective contact zones lla ', llb', etc, of the printed circuit on the card 16 (see-figure 3). Each of the li lamps, etc., is constituted by a tubular envelope of transparent glass closed at one of its ends by a seal through which the conductive wires pass, and, at the other end, by a pinch. The envelope is covered with a transparent protective material such as a cellulose acetate lacquer. The envelope is filled with a combustible material such as zirconium foils, and a gas promoting combustion such as oxygen.

 The ignition means located inside the envelope are, for example, for a lamp operating under low voltage, a filament connecting the internal ends of the conducting wires which each comprise a pearl of a starter material disposed at the junction of wire and filament.

 When the lamps are placed on the card 16, the conducting wires Ila, llb, ste, are bent as shown, so that the assembly of each longitudinal axis of each of the tubular envelopes constitutes a plane offset with respect to the surface of the card 16, but substantially parallel thereto.

With reference to FIG. 3, the card 16 includes a printed circuit for firing the lamps in response to the control signals formed by voltage pulses. In the example shown in FIGS. 1 to 3, the circuit is entirely printed on a single face of the card, here the obverse of the card, face on which the conductive films of the lamps are connected. Card 16 is produced by means of an insulating support such as phenolic
XP, and the circuit is obtained by chemical etching or by a photographic process, etc. However, it is preferable to print the circuit by stamping of copper which presents a significant saving. Such a process is, for example, described in US patent 3,990,142.

 The card 16 substantially takes the form of a rectangle, one of the sides of which is provided with an extension 16a which is much narrower than the long side of the card from which it projects.

 Terminals 20-25 are arranged close to each other on this extension. They are selectively connected to the contact zones 11a ', 11b' to 15a ', 15b' where the conductor wires of the lamps are connected, by the conductors printed on the card.

 More precisely, the terminal 20 is connected to the common printed conductor 26 to which one of the conductor wires of each of the lamps is respectively connected to the contact zones 11b'-15b '.

Terminals 21-25 are each connected directly to the other lead wire of each lamp. Thus, terminal 21 is immediately connected to the contact area 11a ', terminal 22 to the area 12a', terminal 23 to the area 13a '. terminal 24 in zone 14a 'and terminal 25 in zone 15a'. On the extension 16a of the card, the common terminal 20 and the cin @ eutree terminals 21-25 are provided to be introduced into a socket connected to a pulse generator for igniting the lamps. Such a generator can, by example, to be used with the electronic circuit described in 1 US patent 3,618,492, and may also be incorporated into a graphic camera or an adapter to generate a low voltage pulse in synchronism with the shutter of the camera.

 In addition, a conductive strip 27, on the extension 16a, provides the necessary contact making it possible to switch the operating mode of the camera, that is to say to adjust the latter for artificial light, as described in the American patent. 3,757,643.

 According to the invention, the housing of the device, which can also be used universally, is of particularly simple and inexpensive design. More specifically, the shoemaker is constituted by a single element 30, the front part 31, transparent, is folded over the rear part 32 provided with cavities 11'-15 'where the lamps are arranged. In the example shown, there are five cavities, but they could be more numerous.

 The shoemaker, preferably, consists of a sheet molded of plastic material, such as a strip of cellulose propionate with a thickness of about 0.8 mm, prepared by injection, by heat treatment or by any other appropriate means. In Figure 3, it is evident that the sheet has a fold 33 separating the rear and front parts, and that when the case is closed, this fold 33 extends horizontally along the top of the horizontal row of cavities 11 ' -15 '.

To facilitate closing the case when the sheet is folded, the rear part 32 is provided with flanges 32a and 32b which extend vertically on either side of the row of cavities, with an overhang 32c located under this row of cavities. The front part 31 of the shoemaker comprises a substantially planar transparent part 31a, as well as an overhang 31b s1 extending under the transparent part and following a plane parallel to that of the transparent part 31a but offset with respect thereto. the front part 31 includes a membrane 3lc joining the transparent part 31a to the overhang 31b
When the device is finished, the conducting wires of the lamps are soldered to the appropriate contact areas of the printed circuit on the card 16. The lamps 11-15 being respectively placed in the cavities ll'-15 ', the card 16 can between applied against the overhang 32 of the shoemaker. The front part of the shoemaker is then folded back, the printed card 16 being placed between the two overhangs 31k and 32 and the lamps enclosed in their respective cavities. In this way, the transparent part is located opposite the lamps while the top and the side walls of the cavities are in contact with the transparent part of the front part of the case so as to determine individually for each of the lamps, an enclosed space. As shown, an opening is provided at the bottom of each of these spaces so as to allow the introduction of the conducting wires of the lamps to connect them to the contact areas of the printed circuit on the card. Thanks to this arrangement, as can be seen in FIG. 2, the membrane 31c protects the conductive wires and the contact areas of the printed card. The edges and the bottom of the shoemaker are then closed by means of a sealer for example. More specifically, the flanges 32a and 32b are brought into contact with the edges of the transparent part 31a so that an adhesive can interpose between them . It is also possible to use any other means of securing.

 As shown, the edges 32a and 32b can extend from the bottom to the top of the rear part of the case to match the offset between the front periphery of the cavities and the overhang 32c, and thus extend over the entire edge of the case. In other words, the flanges 32a and 32b come into contact with the lateral edges of the transparent part 31a of the membrane 31c and of the edge nib. At the bottom, the overhangs 32c and 31b are fixed respectively to the sides of the printed card, for example also by means of an adhesive.

 In order to facilitate the connection between the terminals @ s 20-25 and the contacts of the socket, the extension 16a of the printed card projects below the housing. When the latter has closed, as shown in Figures 1 and 2, the terminals remain apparent.

 According to another embodiment of the invention shown in Figure 4, the surfaces of the cavities ll'-15 where the lamps are arranged and facing the latter, are covered by selective metallization of the housing, with a layer 34 of reflective material . According to this process, a metal sheet or any other suitable material is cut to serve as a mask 36. By applying the mask against the unfolded case, any deposit of metal vapor is avoided on the front part 31, on the edges 32a and 32b and on the deberd 32c. The mask 36 @st pierced with a window 38 making it possible to produce a reflecting surface only in the part where the cavities ll'-15 'are formed. Generally the reflective coating is obtained by depositing aluminum in the cavities. In this way, the reflective layer is only deposited in the parts facing the lamps, the front part 31, the edges 32a, 32b and the overhang 32c receiving no trace of metallization.

 The lightning control circuit starts to operate as soon as terminals 20-25 are connected to a pulse source as described, for example, in US patents 3,618,492 and 3,757,643. has still been used, the first pulse which is applied between the terminals 20 and 21 is directly transmitted to the conducting wires of the first lamp 11, which causes the ignition of the latter and the opening of the electrical circuit between its wires conductors lla and llb.

In the electronic circuit described in American patent 3,618,492, a monitoring function is ensured by the application of a current of determined maximum value and limited to all unused lamps. This current is generated before firing one of the flashlights. In this way, a signal is obtained by which the already used lamps are switched off. This monitoring function depends on the resistance between the conducting wires of the lamps. Thus if this circuit detects a relatively high resistance between the conducting wires of a lamp, for example greater than 50 Ohms, the terminal corresponding to this lamp is switched off and the firing pulse is only applied to terminals of the next lamp whose resistance between the conductor wires is low. In other words, as soon as the monitoring circuit detects a resistance below a certain value (for example less than 50 Ohms), the firing pulse is applied to the corresponding terminals.

In the present case, when the first lamp 11 has already been used, the monitoring circuit causes the terminal 21 to be switched off and the terminal 22 to be connected to which the lamp 12 which has not yet been used is connected. Therefore, when the firing pulse appears, it is directly applied to the lamp 12 from which the lightning results. The third pulse is applied identically between terminals 20 and 23 to generate the flash of the lamp 13. The fourth pulse is applied between terminals 20 and 24 to ignite the lamp 14 and the fifth pulse between terminals 20 and 25 for igniting the lamp 15. During the flashing, the reflective stallic coating 34 makes it possible to direct the light towards the front part of the device.

 The use of a single-component case 30, the partially transparent front portion 31a of which is folded over the rear portion which includes the reflective cavities 111-15t, offers numerous advantages. Indeed, thanks to the absence of sealing lips at the top of the device, a reduction in its total height is obtained, which also results in a reduction in the amount of plastic material used. In addition, the fold 33 reinforces the longitudinal rigidity of the shoemaker. Likewise, with a seal at its top, the shoemaker would not exhibit as effective resistance as with pleat 33.

According to another embodiment, the device can be further simplified by directly depositing the lightning control circuit on the housing as shown in FIGS. 5 and 6. More precisely, the electrical circuit which includes the terminals 2Q-25 and the zones of contact of the lamp wires 11a ', 11b', etc., is directly deposited on the surface of the overhang 32c in extension under the cavities 11'-15 '
Preferably, the copper circuit is deposited by stamping on the overhang of the housing. To be able to ensure the connection of terminals 20-25 in the corresponding socket, the bottom of the housing 30 'is modified so as to create the extension 32d of the part bottom of the deberd 32c, the extension 32d being much narrower than the overhang 32c. As shown, the terminals 20-25 are arranged one next to the other on the extension 32d. During the manufacture of the device shown in FIGS. 5 and 6, the lamps 11-15 are placed in the respective cavities 11'-15 'and the conducting wires 11a, IL, etc. are welded @ to the corresponding contact zones 11a ', 11b', etc. on the overhang 32c. The front part 31 of the casing 30 ′ is then folded up and then secured by means of the flanges 32a and 3 At the bottom, the overhang 31b of the front part of the shoemaker is locally fixed to the edge edge 32c of the rear part by means of 'an adhesive for example.

The electrical circuit and its connections being located on one side of the overhang 32c, that is to say on the side where the cavities are.

Thus, when the case is closed, part of the electrical circuit is between the two attached overhangs 31b and 32a while the extension 32d protrudes from the case as can be seen in Figure 6. As described with reference to Figures 1 and 2, all of the lamps, the conducting wires of these latter res and of the contact zones are then inside the case constituted by the rear part with the cavities 11'-15 ', the transparent part 31 and the membrane 31c.

 Although the examples described above relate to devices equipped with five lamps arranged in a row for unidirectional use with a relatively narrow extension serving as a connector, it is obvious that such a case can be made for any type device, including two or more lamps, for bidirectional use, in row or not, with an extension serving as a connector as wide or much wider than the circuit board or the overhang 32c. For example, Figure 7, there is shown ten flash lamps 40 arranged in a linear row in a case 42 in accordance with the present invention and the reflective cavities 44 of which are formed in the rear part are all directed in the same direction * Although having ten cavities and different dimensions, the housing 42 is substantially identical to the shoemaker 30 described with reference to Figures 1 to 3. The device of Figure 7 includes a printed board whose extension 46 e is wider than the main part of the map. On this extension 46, the terminals 48 protrude outside the shoemaker. If, as shown, only five terminals are provided, to which is added the common terminal for controlling the firing of the ten lamps, a special circuit must be used. When the lamps are connected to the circuit and the printed circuit board is put in place, the case 42 is closed in the same way as the case described above with reference to FIGS. 1 and 2.

 Although only certain embodiments have been described, it is obvious that any modification made by those skilled in the art in the same spirit would not depart from the scope of the present invention. For example, the shoemaker 30 may other made of a material other than cellulose propionate, for example in any other strip of thermoplastic material; the card support can be made up of another material than phenolic, for example by enamelled steel or by polystyrene; the reflective coating may other made of a material other than aluminum.

In certain applications, it is possible to avoid making a metallic coating on the surface of the cavities. Finally, a material other than copper can be used to make the printed circuit.

Claims (18)

R E V E N D I C A T I O N S  1 - Device for flash lamps for photographic use, characterized in that it comprises, in combination: - a housing constituted by a single element (30), the par  frontal tie (31), transparent, is folded by  rear part (32) which is molded to present a plura  cavity unit (11'-15 ') c @ nstituating receptacles for  the lamps (11-15), - a plurality of flashlights (11-15) arranged in the  said cavities (11'-15 ') that the trans frontal part closes  parent (31a), - terminals (21-25) fixed to said housing and connected electrically  only to the said lamps (11-15) to control the firing  lamps in response to signals applied to said boxnes.  2 - Sound device of claim 1, characterized in that said housing is constituted by a sheet molded of plastic, said cavities (11'-15 ') being molded in the rear part (32) of said housing.  3 - Device according to claim characterized in that a linear fold (33) separates the rear part (32) from the front part (31).  4 - Device according to claim i, characterized in that the cavities (11'-15 ') are arranged side-by-side in a horizontal row, the said fold (33) being arranged horizontally above said cavities.  5 - Device according to claim 1, characterized in that a linear fold (33) separates the rear part (32) from the front part (31) at the top of said housing which further includes means for fixing the front part (31) at the rear part (32), the said means extending over the edges (32a, 32b) and at the bottom of the said case when the latter is closed, so as to determine a closed receptacle for the lamps.  6 - Device according to claim 5, characterized in that terminals protrude under said housing.  7 - Device according to claim 6, characterized in that said lamps (11-15) have two conductive wires (lla-llb) electrically connected to contact zones (l1a1-llb1) connected to said terminals, said zones being located inside the closed case.  8 - Device according to claim I, characterized in that a coating (34) of a reflective material is deposited on the surface of said cavities (11'-15 ') facing said lamps.  9 - Device according to claim 8, characterized in that said shoemaker comprises a linear fold (33) separating the front part (31) from the rear part (32) and arranged horizontally at the top of said shoemaker and further comprises means to secure said front part to said rear part arranged along the edges and at the bottom of said shoemaker, said coating of reflective material is obtained by metallization of the surface of the cavities with regard to said lamps, said front part, edges and bottom of the rear part of the shoemaker being devoid of any coating.  10 - Device according to claim I, characterized in that said terminals are arranged on the extension (l63) of a card (16) having an electrical circuit printed on one of its faces, said circuit including zones of contact (11a'-15b ') to which the two conductor wires of the lamps are respectively connected, the said extension (16a) projecting out of the case and below the latter, the said terminals and the contact zones being arranged '' same category of the said card.  ll - Device according to claim 10, characterized in that said card (ó) has a substantially rectangular shape with an extension (16a) projecting on its longest side, said extension being much narrower than said longer c8té , the said terminals being arranged side by side on the said extension.  12 - Device according to claim 10, characterized in that said card (16) has a substantially rectangular shape with an extension (16a) curdling on its longest c8té, said extension being wider than said longer side. said terminals being arranged side by side on said extension.  13 - Device according to claim 10a characterized in that a linear fold (33) which separates the rear and front parts is provided horizontally at the top of said housing when the latter is closed, said rear part (32) of said housing includes a first overhang (32c) extending anus dac said cavities (11'-15 '), said front part (31) includes a transparent part (31a) in reg @ rd of said lamps (11-15) and a second overhang (31b) extending below this transparent part, the terminals are arranged side by side on the extension (16a) of said card (16), collider means being provided for fixing the cold part at rear part along the edges (32a-32b) and at the bottom of the said housing so as to determine an enclosed space for the said lamps, one part of the said printed card being pinched between the said first and second overhang of the said housing, the said extension projecting below and out of said closed case 0  14 - Device according to claim 13, characterized in that the conductive son of said lamps and the contact areas are arranged inside the housing when the latter is closed.  15 - Device according to claim 14, characterized in that said transparent part (31a) and said second projection (31b) of said front part of said housing are arranged in substantially parallel planes offset from each other, said part front including a membrane (31c) connecting said transparent part (31a) and said second overhang (31b), said membrane (31c) protecting said conductive wires.  16 - Device according to claim 1, characterized in that said shoemaker has a linear fold (33) separating the front and rear parts, arranged horizontally along the top of said shoemaker when the latter is closed, said rear part (32 ) being provided with a first overhang (32) projecting under said cavities (11-15t) over substantially its entire length, an electrical circuit including said terminals connected to a plurality of contact zones being printed on a surface of said first overhang (32c), each lamp (11-15) having two conducting wires (lla-llb), electrically connected respectively to each contact area, the edge of said first overhang including said terminals projecting under the front part (31 ) when the case is closed, all the contact areas being located in the same category of said overhang.  17 - Device according to claim 16, characterized in that said first overhang (32c) has an extension on its lower caté, said extension being much narrower than said first overflow and said terminals being located cdte-à-c8te on the said extension.  18 - Device according to claim 16, characterized in that said first overhang (32c) has an extension on its lower caté, said extension being wider than said first overhang and said terminals being located side by side on said extension.  19 - Device according to claim 16, characterized in that said front part (31) comprises a transparent part (31a) opposite said lamps (11-15) and a second projection (31b) projecting under said transparent part (31a), said first overhang having on one of its sides an extension on which said terminals are arranged side by side, said device further comprising means for securing the front part to the rear part arranged on the edges (32a-32b) and at the bottom of the case when the latter is closed, so my will be to determine closed receptacles for the lamps, part of the said printed circuit being pinched between said first and second edges, the extension of the said first overhang protruding out of the boot and below it.  20 - Device according to claim 19, caracoe'risa in that the conductors of said lamps and said contact areas are closed in said case  21 - Device according to claim 20, characterized in that ld said transparent part (31a) and said second overhang (31b) determine plants which are soundly parallel but offset from each other, the said @ front part including there is also a membrane (31c) @ linking said transparent part to said second overhang and protecting said conductive wires.  22 - Device according to claim 1, characterized in that said shoemaker includes a linear fold (33) separating said front and rear parts, arranged horizontally at the top of said shoemaker, said front part (31) of said shoemaker including a part transparent (37a) substantially planar opposite said lamps, and the top and the periphery of the cavities being substantially in contact with said transparent part after closing the case, so as to determine closed receptacles for the lamps.  23 - Device according to claim 22, characterized in that said shoemaker also includes means for solidam riser the front and rear parts, on the edges (32a-32b) and at the bottom of said shoemaker so as to determine receipts closed keys for the lamps, each lamp (11-15) having two conductive wires (lla-llb) electrically connected respectively to the contact zones (11b'-15b ') of said printed circuit inside said shoemaker, said conductive wires passing through an opening at the bottom of each closed cavity to reach the circuit