FR3062890A1 - PROTECTIVE DEVICE FOR SPOT MOUNTED TO CEILING - Google Patents

Abstract

Protective and styling device (10) for a lamp (8) to be installed in a ceiling (9), comprising a deformable and resilient body (1) generally bell-shaped open on a mouth (5) the body forming a wall continuous molding obtained from at least two materials, the body comprising reinforcing elements (3) of rigid plastic formed from a first material, supplemented by elastic elements formed from a second elastomeric material (4). ) overmolding, to form said continuous wall together.

Description

© Publication number: 3,062,890 (to be used only for reproduction orders) (© National registration number: 17 51129 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY

COURBEVOIE © Int Cl ⁸ : F21 S 8/02 (2017.01), F 21 V 15/01, 21/02

A1 PATENT APPLICATION

©) Date of filing: 10.02.17. (© Priority: (© Applicant (s): EUR'OHM Simplified joint stock company - FR. @ Inventor (s): EMAILLE RODOLPHE. ©) Date of availability of the request: 17.08.18 Bulletin 18/33. ©) List of documents cited in the preliminary search report: See the end of this booklet (© References to other related national documents: ©) Holder (s): EUR'OHM Simplified joint-stock company. ©) Extension request (s): © Agent (s): CABINET PLASSERAUD.

(54 / PROTECTION DEVICE FOR SPOT MOUNTED IN CEILING.

FR 3 062 890 - A1

Protection and covering device (10) for a lamp (8) intended to be installed in a ceiling (9), comprising a deformable and resilient body (1) in the general shape of a bell open on a mouth (5) the body forming a wall continuous obtained by overmolding from at least two materials, the body comprising reinforcing elements (3) of rigid plastic formed from a first material, supplemented by elastic elements formed from a second elastomeric material (4 ) overmolding, to form together said continuous wall.

i

Protective device for ceiling mounted spot

The present invention relates to protective devices for spotlights to be mounted on the ceiling.

In the building and construction of buildings or residential houses, there is a tendency to improve energy performance to reduce C02 emissions overall. New insulation constraints have thus appeared for so-called BBC buildings (Low Consumption Buildings).

It is thus common to have recourse to the installation of insulator of the wool type of glass, rock wool, cellulose wadding, ... in the form of plate or roll of 20cm or more of thickness, or in the form of loose flakes to spread on the surface to be insulated.

Furthermore, with regard to lighting devices arranged in the ceilings, the tendency is to install recessed lamps, otherwise often called recessed "spots". Although LEDs are gradually replacing filament lamps, heat dissipation remains an issue to consider—

The installation requires the reservation of a certain volume above the ceiling wall, in order to accommodate the lamp, the electrical conductors, and if necessary an electrical protection device or even a small specific local transformer. This volume also makes it possible to guarantee a thermal equilibrium compatible with the operating temperatures of the lamps.

The volume required for the spot (the lamp) competes with the presence of the above-mentioned insulating layer.

Consequently, a lamp protection and capping device intended to be installed in the ceiling is generally provided, which device pushes up the aforementioned rock wool type insulation, to delimit the volume necessary for the spot and its accessories.

It must also be taken into account that access from above is often not possible and everything must be mounted from below through a hole made in the ceiling wall (in practice the single hole drilled to install the lamp in position).

This constraint of insertion from below must be combined with the need to provide an airtight protection and styling device in the context of the new BBC regulations mentioned above.

To complete the presentation of the context of the invention, it should be noted that the size of the spots is not standard and the most common spots have different diameters, with a diameter of the collar of the support framing the spot being between 60mm and 90mm.

The inventors have thus identified a need to propose a protection and styling device which can be inserted from the bottom, which is airtight, and which can be suitable for different spot diameters.

To this end, a protection and styling device intended to be installed in a ceiling is proposed here, comprising a deformable and resilient body in the general shape of a bell open on a mouth, the body forming a continuous wall formed by overmolding from at least two materials, the body comprising rigid plastic reinforcing elements formed from a first material, supplemented by elastic elements formed from a second elastomeric overmolding material, to form together said continuous wall.

Thanks to such provisions, the protection and styling device in question fulfills the resulting characteristics aimed at namely: it can be inserted from the bottom thanks to airtightness, and thanks to its bell shape, it is in elastic deformation parts formed from second material, it is suitable to be associated with spot supports of different diameters.

The reinforcing elements provide sufficient support for the structure to support the weight of a thick layer of insulating material.

In various embodiments of the system according to the invention, one can optionally have recourse to one and / or the other of the following arrangements.

In one aspect, the mouth is advantageously circular in shape with a predefined diameter at rest, between 58mm and 60mm, preferably between 58.5mm and 59mm. We thus obtain a tightening compared to a body of spot ('mini') of 60mm.

According to one aspect, the body is deformable by elongation of the elastic elements so as to obtain an enlargement of the internal diameter of the mouth up to 90mm. The device can thus be inserted on spot supports having an insertion diameter which ranges from 60mm to 90mm. This covers most of the range

spots • According to a aspect, the end portion from the body adjacent at the mouth East formed only by a ring homogeneous of second material. this allows to get a

homogeneous tightening around the perimeter of the spot support, preventing the passage of air.

In one aspect, the generally bell-shaped body has an axis and the body has an axial length at least equal to 1.8 times the diameter of the mouth at rest. This facilitates deformation, and makes it possible to accommodate auxiliary elements linked to the spot above the latter.

In one aspect, the reinforcing elements are formed

background base and legs that extend er i direction of the mouth. This gives rigidity structural sufficient in compression in the axial direction for bear the weight thick layer of material insulating. According to a aspect , the body at rest has a shape slightly conical, low taper β (opening of

preferably less than 5 °), which flares from the bottom to the mouth. This facilitates insertion through the hole while providing housing of substantial interior volume.

In one aspect, two attachment bases are provided on the reinforcing elements, arranged in diametrically opposite positions, to receive retaining springs. The springs keep the protection device in place, the attachment base is rigid enough to withstand the forces exerted by the spring.

According to one aspect, there are provided in the attachment bases retention forms for clipping onto a spot support. This reinforces the hold by tightening between the protection device and the spot support.

The invention also relates to an assembly comprising a protection device as described above and a spot support.

The invention also relates to a method for mounting a lamp intended to be installed in a ceiling, the method comprising:

- supply a spot support and a protection device as described above,

- make a hole with the diameter provided for the body of the spot support in the ceiling,

- run electrical conductors through holes in a protection device,

- electrically connect a lamp socket to said electrical conductors,

- insert the protection device on the spot support to form an assembly as described above,

- insert said assembly into the hole,

- connect the lamp to the socket and place it in the spot support.

Other aspects, aims and advantages of the invention will appear on reading the following description of one of its embodiments, given by way of nonlimiting example. The invention will also be better understood with reference to the accompanying drawings in which:

FIG. 1 represents a general diagram in section of a lamp protection device according to the invention installed in a ceiling with associated lamp support and lamp,

FIG. 2 shows a perspective view of the protection device, seen from the mouth,

FIG. 3 shows a perspective view of the protection device, seen from the bottom,

FIG. 4 is similar to FIG. 1 and shows an axial section of the protection device, along the line Y visible in FIG. 5,

FIG. 5 shows a cross section of the protection device, along the line V-V visible in FIG. 4, with several degrees of deformation,

FIGS. 6A and 6B illustrate the assembly of a protection device on the lamp support,

- Figures 7A and 7B show detailed views of the clipping function between the protection device and the lamp holder.

- Figures 8 and 9 respectively show an axial sectional view and an external profile view of an assembly

including a sealing. device protection provided with lip On the different figures, the same references designate elements identical or similar. For

to facilitate understanding of the invention, some dimensions are not necessarily to scale in the drawings.

In Figure 1 is shown a protection device 10 also called protection and styling device; the device in question has in particular the function of delimiting a volume for the installation and the longitudinal one.

protection of a lamp 8, of the recessed spot type.

More specifically, the lamp 8 is intended to be installed in a ceiling 9, without protruding from the visible wall of the ceiling. This lamp 8 is mounted on a spot support (or lamp support, or even "support flange") marked 2, which is inserted into a round hole 19 in the ceiling. The installation of the spot with its protective device pushes up a layer of glass wool or rock wool marked 7.

This support 2 comprises an annular body with a radially outer surface intended to come to bear on the ceiling wall inside 29 of the hole 19 and a radially inner surface which comprises a groove 28 for receiving a retaining ring 82 for holding the spot. In addition, the support comprises a finishing front face 25, of larger diameter than the annular body, which comes to bear on the lower face 90 (visible) of the ceiling wall.

The device 10 comprises a body 1, which has the particularity of being deformable and resilient.

The body 1 has a general shape of a bell with a closed bottom 12, an almost cylindrical main portion and a mouth 5 which opens opposite side of the bottom. The bell-shaped body has an axis A, also called axis

The body 1 has a slightly conical shape with low taper from the bottom 12 to the mouth 5. The body widens from the bottom 12 to the mouth 5 along the axis C which forms an angle β with the axis A (Fig. 4). The angle β is preferably less than 5 °.

The mouth is circular in shape, axis A.

The body 1 forms a continuous wall, airtight, obtained by overmolding from at least two materials.

The body comprises reinforcing elements 3 made of rigid plastic formed from a first material, forming the structural support. The reinforcing elements are completed by elastic elements formed from a second elastomeric material 4, to form together said continuous wall. The body 1 is obtained by overmolding; preferably, the reinforcement structure 3 is first produced by molding, then the reinforcement structure is placed in another mold in order to inject the second material therein.

The first material can be polypropylene, but any other fairly rigid injectable plastic can also be used such as polyamide, ABS, PVC, polyethylene, etc.

For the second material, one can choose an elastomer of natural origin (rubber) or synthetic such as for example synthetic polyisoprene, polybutadiene, styrene-butadiene copolymer. Preferably, styrene-ethylene-butylene-styrene ('SEBS') will be chosen.

The rate of linear elongation of this second material can range up to 80% or even 90% to facilitate deformation, without breaking or damaging while remaining in the elastic range.

The reinforcing elements 3 are formed with a base of

background 30 and paws 31 who extend in direction of the mouth in starting from the bottom base 30. The paws stop at 5 to 10 mm of the border of the mouth. The paws can present a curvature (Fig, • 5) for to follow

the general shape of the bell.

Two of these tabs are wider: in fact these large tabs marked 32 are arranged in diametrically opposite positions and they each carry an attachment base 35 for receiving a retaining spring 6.

The two retaining springs are, according to an advantageous option, recovered from the spot support 2, on which they have been removed beforehand. As a variant, the retaining springs are already provided and mounted on the attachment bases 35 of the device 10. In this case, as most of the spotlight supports sold are already provided with springs, the mounting of the protection device on the support of spot 2 involves removing the springs supplied from the spot support beforehand.

The elastomeric deformable portion comprises a homogeneous ring 51 of second material, from which extend towards the bottom of the elastomer tongues 41, this homogeneous ring 51 forming the mouth which ends in the abovementioned mouth.

In the example illustrated, the frame structure comprises six legs, 2 wide legs and 4 single legs. In the example illustrated, there are also six tongues of elastomer 41, of similar size, regularly distributed over the circumference and each interposed between two rigid tabs.

Thus, on the circumference, there is an alternating succession of reinforcing legs 31, 32 and tongues of elastomer 41. It is noted that the number of legs and tongues could be different.

Referring to Figures 8 and 9, the ring 51 of second material advantageously comprises, on its outer wall, a peripheral sealing lip 52. This sealing lip is in abutment against the inner wall 29 of the hole 19 in the ceiling when the protection device is in place around the lamp 8, and thus makes it possible both to ensure a thermal seal at the level of the 19 made in the ceiling because it blocks the passage of air, and to block if necessary the fall of dust from the insulating material 7 towards the part through said hole 19.

This lip 52 is advantageously formed from the same second material as the ring 51 by coming integrally with it.

There are provided at the base of one or more reinforcement tabs 31, 32, and preferably at the base of the wide tabs 32 diametrically opposite, receiving shapes for clipping onto the spot support flange 2 (Fig. 7A 7B), adapted to cooperate with complementary clipping forms 27 provided on said spot support flange 2.

In the case where the spot support is supplied with springs, the complementary clipping forms 27 are advantageously spring retaining rods which are already arranged in the spot support 2. As a variant, these forms 27 can be specially provided for this effect on the spot support, especially in cases where it is not initially provided with springs.

The diameter of the mouth at rest denoted D0 is between 58 mm and 60 mm, preferably between 58.5 mm and 59 mm. As illustrated in Figures 4 and 5, the structure of the protection device 10 described above allows it to be extensible, so that the diameter of the mouth can increase to adapt to several spot supports. In FIG. 5 in particular, the external diameters D7 and D8 have been shown corresponding to two possible degrees of deformation of the mouth, and corresponding respectively to two internal diameters DI and D2. The deformation of the mouthpiece can go up to 90 mm for the internal diameter of the mouth D2.

To facilitate deformation, the body has an axial length H at least equal to 1.6 times the diameter of the mouth at rest D0, for example greater than or equal to 1.8 times said diameter; the enlargement is all the more marked as one moves from the bottom towards the mouth.

There is a thinning of the elastomeric parts as the diameter increases, but taking into account the high rate of possible elongation of the elastomeric material, this deformation occurs without mechanical damage and without losing the continuity of the body wall .

The passage of the electrical conductors 88 can be made by drilling one or more small hole (s) 13 in one of the elastomeric tongues 41 as illustrated in the figure.

1.

As a variant, as can be seen in FIG. 9, one can provide in one of the frame lugs 31, 32 a zone 14 of second material (for example elastomer), in which said holes 13 are made.

The mounting of a lamp in the ceiling with such a protection device then comprises the passage of the electrical conductors 88 of the building through said holes, and their connection to the socket 85 of the lamp. The protection device 10 is then mounted on the spot support 2, from which the springs have been removed beforehand, to form an assembly E. Then the assembly E thus formed is mounted in the hole 19, and finally the lamp is connected to its socket and positioned in the spot support.

Claims (10)

1. Protection and covering device (10) for a lamp (8) intended to be installed in a ceiling (9), comprising a deformable and resilient body (1) in the general shape of a bell open on a mouth (5), the body forming a continuous wall obtained by overmolding from at least two materials, the body comprising reinforcing elements (3) of rigid plastic formed from a first material, supplemented by elastic elements formed from a second elastomeric material (4) overmolding, to form together said continuous wall. 2. Device according to claim 1, in which the mouth is of circular shape with a predefined diameter at rest (D0), between 58 mm and 60 mm, preferably between 58.5 mm and 59 mm. 3. Device according to claim 2, characterized in that the body is deformable by elongation of the elastic elements so as to obtain an enlargement of the internal diameter of the mouth up to 90 mm. 4. Device according to claim 2, wherein the body (1) in the general shape of a bell has an axis (A) and the body has an axial length (H) at least equal to 1.8 times the diameter of the mouth at rest (D0). 5. Device according to one of claims 1 to 4, wherein the reinforcing elements are formed by a bottom base (12) and legs (31,32) which extend in the direction of the mouth. 6. Device according to one of claims 1 to 5, in which the body at rest has a slightly conical shape, with low conicity β (opening preferably less than 5), which flares from the bottom (12) to the mouth (5). 7. Device according to one of claims 1 to 6, in which there are provided two attachment bases (35) on the frame elements, arranged in diametrically opposite positions, to receive springs (6) for holding. 8. Device according to claim 7, in which there are provided at the base of reinforcing elements retention forms (37) for clipping on a spot support (2). 9. Assembly (E) comprising a protection device (10) according to one of the preceding claims and a spot support (2). 10. Method for mounting a lamp (8) intended to be installed in a ceiling (9), the method comprising the following steps: - supply a spot support (2) and a protection device according to claim 1, - make a hole (19) with the diameter provided for the body of the spot support in the ceiling, - passing electrical conductors through holes (13) of a protection device (10), - electrically connecting a lamp socket (85) to said electrical conductors, - insert the protection device on the spot support to form an assembly (E) according to claim 9, - insert said assembly (E) into the hole (19), - connect the lamp to the socket (85) and place the lamp (8) in the spot support. 1/6