Patent Description:
Typical logo lights, also referred to as approach lights or security lights, have been used as a way to improve security around a vehicle and/or to project an aesthetically pleasing logo adjacent to the vehicle.

Modern vehicles include functional elements and/or decorative elements, such as security lights, approach lights, integrated in the vehicles. Security lights or approach lights are typically used as a way to improve security around the vehicle. More recently more sophisticated projector-based lamps have been developed that use a lens arrangement incorporating a filter, mask, or screen (or similar) to project a logo, image symbol, text, icon, or the like (referred to as logo in the following) through an aperture. Projection of the logo requires the use of more complicated optical arrangements compared with standard approach lights. Projection based lights will be referred to as logo lamp in the following. In order to make sure that the logo can be projected onto a road without any distortions, the position of the logo lamp must be exactly defined. Typically, logo lamps are integrated within rear view system of the vehicle. However, the logo lamps may be mounted directly on the vehicle independent of the rear view systems.

Logo lamps usually include a housing, a light source mounted on a printed circuit board and a lens or a plurality of lenses that are placed on top of each other. On exposure to shock or
vibration the lenses produce rattling noise and may get damaged on prolonged exposure. This may also cause the lenses to get misaligned and hence projection of the logo gets distorted. When the lenses are manually assembled, friction fits can be used to prevent rattling of the lenses when they are exposed to shock or vibration. However, manual assembly is time consuming and is not cost effective. In the case of automated assembly, it is preferred to have clearance between lenses to prevent jamming and allow the fastest possible assembly time. Furthermore, an extra component (e.g. cover) or glue, screw or welding process is generally required to hold the lenses and the PCB to the housing making the stack of lens rigid, and thus would cause either a rattle or significant strain on the PCB on exposure to shock or vibration.

<CIT> discloses a logo lamp comprising a housing having a top, a bottom, a left side, a right side, a front, and a back, a cap covering the top of the housing or preferably an encapsulant, one or more clips formed integrally with or attached to the housing, a connector receiving portion including an opening formed at the back of the housing, a printed circuit board (PCB) fully enclosed within the housing, a light source connected to the PCB and enclosed within the housing, and an optical assembly including at least one optical element for receiving light projected by the light source. However, <CIT> does not discloses any means for preventing rattling of the lenses.

<CIT> discloses a puddle lamp, and <CIT> discloses a greeting lamp. Both <CIT> and <CIT> disclose one or more lenses, however, none of them discloses any means for preventing rattling of the lenses. <CIT> further discloses a rearview mirror lamp which can project a logo pattern onto the ground near the front vehicle door.

Thus, all of the above prior arts may have a drawback of having a rattling sound of the lenses on exposure to shock and vibration.

It is an object of the present invention to further develop the known logo lamp device to overcome the drawbacks of the prior art.

This object is achieved by the characterizing features of claim <NUM>. Embodiments of logo lamp device according to the present invention are described in claims <NUM> to <NUM>.

Thus, the logo lamp device according to the present invention further comprises at least one retaining mechanism configured between the at least one first lens and the inner housing, wherein the at least one first lens is configured to push the at least one second lens against the inner housing. The at least one first lens might be detachably mounted onto the inner housing.

The logo lamp device of the present invention has an advantage that a retaining mechanism is configured in the logo lamp device such that the at least one first lens is detachably mounted onto the inner housing, and/or the at least one first lens always pushes other parts of the optical assembly against the housing such that there is always a residual force acting between the optical assembly and the inner housing. The residual force keeps the optical assembly intact and thus any rattling noise is prevented on exposure to shock or vibration. Since there is no rattling in the optical assembly, the plurality of lenses is protected from getting damaged on exposure to shock or vibration, thus the operating life of the logo lamp device is enhanced. Further, since the optical assembly is kept intact, the plurality of lenses is also prevented from any misalignment due to exposure to shock or vibration.

The logo lamp device according to the present invention may be mounted within a rear view system. However, various embodiments are possible in which the logo lamp device may be mounted separately on the vehicle. In other possible embodiments, the logo lamp device may be used in non-vehicular systems as well.

The term "vehicle" denotes any motor driven vehicle with or without trailers driven be a driver, where the driver requires information about persons, other vehicles or objects in the (near) surrounding of the vehicle to be able to drive safety. As an example, vehicles are cars, trucks, tractors or trailers.

The term "rear view" is herein referred as a view of the surrounding area, which is not in the field of view of a driver, i.e. the directions opposing, left, right, below and above of the viewing direction, but can also comprise the view in the direction of the viewing direction of the driver and/or any combinations of the directions.

The term "driver" and "driver of the vehicle" relates here to the person controlling the main parameters of the vehicle, such as for example direction, speed and/or altitude, e.g. normally the person located in the location specified for the controlling person, for example a seat, but can also relate to any other person or entity within or outside of the vehicle.

The term "lens" denotes an optical body that features a single lens or a plurality of lenses that mounts to the logo lamp device. Some lenses are interchangeable, while others are built into the construction of the logo lamp body. The lens is responsible for condensing and projecting light rays from the light source to the surrounding the vehicle.

In an embodiment, the retaining mechanism comprises a snap fit mechanism, wherein the at least one first lens comprises at least one extended arm having a retaining end, and the inner housing comprises a receiving portion for receiving the retaining end of the at least one extended arm of the at least one first lens. The snap fit mechanism comprises a small protrusion (hook, stud, or bead) which is deflected during assembly to catch in a depression on the mating part. In this embodiment, the at least one first lens has an extended arm with a retaining end. The extended arm of the at least one first lens is in the form of U-shape or V-shape which is configured to be deflected when assembly is initiated. The inner housing has a receiving portion, which is configured to receive the retaining end of the at least one first lens. When assembled, the retaining end of the at least one first lens sits on the receiving portion of the inner housing and the extended arm regains original shape, hence the at least one first lens is locked on the housing. This configuration has an advantage that by using simple snap fit mechanism, the optical assembly is retained within the inner housing without any rattling in case of shock and vibration. The design and manufacturing of snap fit mechanism is simple. Further, the snap fit mechanism is a detachable mechanism and hence replacement of parts is possible.

In another embodiment, the retaining mechanism comprises a threaded mechanism, wherein the at least one first lens comprises at least one extended arm having threads, and the inner housing comprises threads complementary to the threads of the at least one first lens. During assembly, the threads of the at least one first lens mate with the threads of the inner housing. This configuration has an advantage that by using simple threaded mechanism, the optical assembly is retained within the inner housing without any rattling in case of shock and vibration. The design and manufacturing of threaded mechanism is simple. Further, the threaded mechanism is a detachable mechanism and hence replacement of parts is possible.

In another embodiment, the retaining mechanism comprises a bayonet mechanism, wherein the at least one first lens comprises at least one extended arm having bayonet end, and the inner housing comprises bayonet receiving portion. During assembly, the bayonet end of the at least one first lens mate with the bayonet receiving portion of the inner housing. This configuration has an advantage that by using simple bayonet mechanism, the optical assembly is retained within the inner housing without any rattling in case of shock and vibration. The design and manufacturing of bayonet mechanism is simple. Further, the bayonet mechanism is a detachable mechanism and hence replacement of parts is possible.

In an embodiment, the at least one first lens is a condenser lens and at least one second lens is a projector lens. The advantage of using at least one condenser lens and at least one projector lens is that the projection of light is directed uniformly and thus enhancing the logo projection.

In an embodiment, the at least one first lens comprises one first lens and the at least one second lens comprises a plurality of second lenses.

In an embodiment, the optical assembly further comprises a mask interposed between the at least one first lens and the at least one second lens. The advantage of using the mask is that any image, shape, letter, symbol, icon or logo can be projected. Various color combination of the projection is also possible. With the arrangement of the retaining mechanism between the at least one first lens and the inner housing, the mask is also retained and held in position due the residual force acting between the optical assembly and the inner housing by the retaining mechanism. Further, the mask may be provided with at least one cut-out for determining a projection, which may be in form of an image, shape, letter, symbol, icon or logo or a combination thereof.

In an embodiment, the inner housing and the outer housing are made in one piece, that is to say, the inner housing and the outer housing are molded together as a single unit. The advantage of having one-piece inner housing and outer housing is that the manufacturing cost of the housing is reduced.

In an embodiment, the inner housing and the outer housing are made in separate piece, that is to say, the inner housing and the outer housing are molded separately and joined together by a joining element, such as a mechanical fastener, adhesive or welding. The advantage of having multi-piece inner housing and outer housing is that the modularity of the housing is enhanced.

In an embodiment, the outer has a cylindrical portion, at least one arm, at least one wing and at least one hole for positioning and fixing the logo lamp device on the rear view system.

The present invention also provides a rear view system of a vehicle as well as a vehicle comprising at least one logo lamp device according to the present invention.

In an embodiment of the vehicle, the one or more logo lamp device is mounted on the vehicle at a mounting location selected from a group at the front portion, at the rear portion, on a side portion, on front bumper, on the rear bumper, on a left door and on a right door of the vehicle. Thus, various location around the vehicle can be projected in various combination of shape and size of the logos.

The present invention also provides a method for assembling a logo lamp device according to the present invention. The method comprises:.

The method of the present invention has the advantage that by using simple assembling tool the at least one first lens is mounted on the inner housing such that no rattling noise is present on exposure to shock and vibration.

In an embodiment, the at least one first lens is provided with a protrusion for detachably attaching the assembling tool. Thus, the assembling tool can be detached easily when assembly is completed.

Other aspects, advantages, and salient features of the present invention will become apparent to those skilled in the art from the following detailed description, which taken in conjunction with the annexed figures, discloses exemplary embodiments of the invention, wherein:.

It is to be understood that the embodiments described are merely exemplary of the present invention that may be embodied in various and alternative forms.

<FIG> and <FIG> illustrate a logo lamp device <NUM> according to a first embodiment of the present invention. The logo lamp device <NUM> comprises an outer housing <NUM> and an inner housing <NUM>. The inner housing <NUM> is enclosed within the outer housing <NUM>. Both the inner housing <NUM> and the outer housing <NUM> have an open end <NUM>. The open ends <NUM> of the inner housing <NUM> and the outer housing <NUM> allow light rays to exit the logo lamp device <NUM>.

The inner housing <NUM> and the outer housing <NUM> may be molded in one piece. In another embodiment the inner housing <NUM> and the outer housing <NUM> may be molded in separate pieces and joined together by using a joining element, such as a mechanical fastener, adhesive or welding. The outer housing <NUM> is configured to be disposed within a rear view system (not shown) of a motor vehicle.

The outer housing <NUM> comprises a cylindrical portion 102a. The cylindrical portion 102a has a longitudinal axis A-A. The logo lamp device <NUM> is configured to be rotated around said axis A-A within a housing of the rear view system (not shown). The outer housing <NUM> further comprises at least one arm 102b, at least one wing 102c and at least one hole 102d. The at least one arm 102b of the outer housing <NUM> is configured to sit on the housing of the rear view system. The at least one wing 102c having the at least one hole 102d is configured to fix the logo lamp device <NUM> on the housing of the rear view system. In the illustrated embodiment, the outer housing <NUM> has three arms 102b, one wing 102c having one extended hole 102d.

During assembly of the logo lamp device <NUM> in the rear view system, the cylindrical portion 102a of the outer housing <NUM> is inserted into the housing of the rear view system in such a way that the at least one arm 102b of the outer housing <NUM> sits on the housing of the rear view system and the extended hole 102d of the outer housing <NUM> aligns with a hole in the housing of the rear view system. The logo lamp device <NUM> is then adjusted by rotating the logo lamp device <NUM> about the axis A-A. After rotational adjustment, the logo lamp device <NUM> is fastened on the rear view system by a fastener, which is inserted and fastened into the extended hole 102d of the outer housing <NUM> and the hole of the housing of the rear view system. Various other embodiments are possible in which the logo lamp device <NUM> may be mounted directly on the vehicle independent of the rear view system.

The logo lamp device <NUM> further comprises a printed circuit board (PCB) <NUM> enclosed within the inner housing <NUM>. The PCB <NUM> comprises at least one light source <NUM> and other electronic elements for controlling the at least one light source <NUM>.

The logo lamp device <NUM> further comprises an encapsulant <NUM> configured opposite to the open ends <NUM> of the inner housing <NUM> and the outer housing <NUM>. The encapsulant <NUM> acts as a sealant for sealing the respective ends of the inner housing <NUM> and the outer housing <NUM>. The encapsulant <NUM> may be a liquid material that is configured to be cured on the inner housing <NUM>, the outer housing <NUM> and the PCB <NUM> to form a hardened material in response to being cured.

The logo lamp device <NUM> further comprises an optical assembly <NUM> having plurality of lenses facing the at least one light source <NUM>. The plurality of lenses comprises at least one first lens <NUM> and at least one second lens <NUM>. Various numbers of lenses are possible for each of the at least one first lens <NUM> and the at least one second lens <NUM> based on the projection requirement.

In the embodiment of <FIG> and <FIG>, the at least one first lens <NUM> comprises one lens and the at least one second lens <NUM> comprises three lenses 118a, 118b, 118c, stacked one over the other on the common axis A-A such that no tolerance is present between the at least one first lens <NUM> and the at least one second lens <NUM>.

The at least one first lens <NUM> may be a condenser lens and the at least one second lens <NUM> may be a projector lens. The at least one first lens <NUM> may be used to condense the light rays coming from the at least one light source <NUM>, and the at least one second lens <NUM> may be used to direct and project the light rays outside the logo lamp device <NUM>.

The optical assembly <NUM> further comprises a mask <NUM> interposed between the at least one first lens <NUM> and the at least one second lens <NUM>. The mask <NUM> may be made of an opaque material having one or more cut-outs of an image, shape, symbol, logo, icon or text such that the cut-out portion of the mask <NUM> allows the light to pass through and the opaque portion of the mask <NUM> stops the light rays to pass through the mask <NUM>. In this manner, the projection of the image, shape, symbol, logo, icon or text is possible via the logo lamp device <NUM>. Other embodiments of the mask <NUM> may include a colored sheet for projecting various colored projections through the logo lamp device <NUM>.

<FIG> illustrates a second embodiment of the logo lamp device <NUM> with a different optical assembly <NUM>. The optical assembly <NUM> of <FIG> still comprises a plurality of lenses with at least one first lens <NUM> and at least one second lens <NUM>. While the at least one first lens <NUM> has one lens, the at least one second lens <NUM> has six lenses 118a, 118b, 118c, 118d, 118e, 118f. Three of the lenses 118a, 118b, 118c are arranged in one stack and three of the lenses 118d, 118e, 118f are arranged in another stack in a parallel combination. The optical assembly <NUM> further comprises one mask <NUM> interposed between the at least one first lens <NUM> and the two stacks of the at least one second lens <NUM>.

The mask <NUM> may have more than one cut-outs for projecting more than one projection selected from of an image, shape, symbol logo, icon and/or text. In the illustrated embodiment, the mask <NUM> has two cut-outs for two simultaneous projections.

The at least one first lens <NUM> may be a condenser lens and the at least one second lens <NUM> may be a plurality of projector lenses. Thus, in this embodiment, one condenser lens, one mask and six projector lenses are illustrated. The advantage of having such an arrangement of lenses is that a common condenser lens and a common mask are sufficient to project more than one projection. Various other possible arrangement of lenses and mask is also possible. For example, the at least one first lens <NUM> may have one lens, the mask may have one mask, and the at least one second lens may have two or three stacks of lenses, each stack may have four or five lenses.

The logo lamp device <NUM> further comprises at least one retaining mechanism for locking the optical assembly <NUM> on the inner housing <NUM>. The retaining mechanism is configured between the at least one first lens <NUM> and the inner housing <NUM>. The retaining mechanism retains the optical assembly <NUM> in the inner housing <NUM> in a closed-fit manner such that there is no tolerance between plurality of lenses. The retaining mechanism is also configured in a manner that a residual force is acting all the time between optical assembly <NUM> and the inner housing <NUM>. Thus, the optical assembly <NUM> is rattle free even when the logo lamp device <NUM> is exposed to shock or vibration.

In the illustrated embodiment shown in <FIG> and <FIG>, the retaining mechanism is a snap-fit mechanism. As shown, the at least one first lens <NUM> comprises at least one extended arm <NUM> having a retaining end <NUM> (more clearly shown in <FIG>). The inner housing <NUM> comprises a receiving portion <NUM> for receiving the retaining end <NUM> of the extended arm <NUM> of the at least one first lens <NUM>. The extended arm <NUM> of the at least one first lens <NUM> is in the form of U-shape or V-shape which is configured to be deflected when assembly is initiated. When assembled, the retaining end <NUM> of the at least one first lens <NUM> sits on the receiving portion <NUM> of the inner housing <NUM>, and the extended arm <NUM> regains its original shape, hence the at least one first lens <NUM> is locked on the inner housing <NUM>. The at least one first lens <NUM> is supported by the PCB <NUM> from the top and the at least one second lens <NUM> on the bottom having the mask <NUM> interposed between the at least one first lens <NUM> and the at least one second lens <NUM>. Thus, a compact assembly is obtained, and a residual force is always acting on the at least one first lens <NUM>, the mask <NUM> and the at least one second lens <NUM> due to the configuration of the at least one first lens <NUM>, the at least one second lens <NUM> and the snap fit mechanism between the at least one first lens <NUM> and the inner housing <NUM>.

<FIG> shows a third embodiment of a logo lamp device <NUM> without showing the outer housing <NUM> for the sake of simplicity. This embodiment is similar to the principles of the above embodiments with at least one first lens <NUM>, a mask <NUM> and a least one second lens <NUM>, except for significant modifications in the retaining mechanism which are discussed herein. In the embodiment shown in <FIG>, the retaining mechanism is a threaded mechanism. The at least one first lens <NUM> comprises for that purpose at least one extended arm <NUM> having threads <NUM>. The inner housing <NUM> comprises threads <NUM> complementary to the threads <NUM> of the at least one first lens <NUM>. During assembly, the threads <NUM> of the at least one first lens <NUM> mate with the threads <NUM> of the inner housing <NUM>. Again, the at least one first lens <NUM> is supported by the PCB <NUM> from the top and the at least one second lens <NUM> on the bottom having the mask <NUM> interposed between the at least one first lens <NUM> and the at least one second lens <NUM>. Thus, a compact assembly is obtained, and a residual force is always acting on the at least one first lens <NUM>, the mask <NUM> and the at least one second lens <NUM> due to the configuration of the at least one first lens <NUM>, the at least one second lens <NUM> and the threaded mechanism between the at least one first lens <NUM> and the inner housing <NUM>.

<FIG> shows a fourth embodiment of a logo lamp device <NUM> without showing the outer housing <NUM> for the sake of simplicity. This embodiment is similar to the principles of the above embodiments with at least one first lens <NUM>, a mask <NUM> and a least one second lens <NUM>, except for significant modifications in the retaining mechanism which are discussed herein. In the embodiment shown in <FIG>, the retaining mechanism is a bayonet mechanism. The at least one first lens <NUM> comprises at least one extended arm <NUM> having a bayonet end <NUM>. The inner housing <NUM> comprises a bayonet receiving portion <NUM>. During assembly, the bayonet end <NUM> of the at least one first lens <NUM> mate with the bayonet receiving portion <NUM> of the inner housing <NUM>. Again, the at least one first lens <NUM> is supported by the PCB <NUM> from the top and the at least one second lens <NUM> on the bottom having the mask <NUM> interposed between the at least one first lens <NUM> and the at least one second lens <NUM>. Thus, a compact assembly is obtained, and a residual force is always acting on the at least one first lens <NUM>, the mask <NUM> and the at least one second lens <NUM> due to the configuration of the at least one first lens <NUM>, the at least one second lens <NUM> and the bayonet mechanism between the at least one first lens <NUM> and the inner housing <NUM>.

The present invention also provides a method of assembling the logo lamp device <NUM>, <NUM>, <NUM> according to the previous embodiments, as illustrated in <FIG>:
The method comprises the step of providing an inner housing <NUM>, <NUM>, <NUM>, an outer housing <NUM> and an optical assembly <NUM> having a plurality of lenses and a mask <NUM>. The inner housing <NUM>, <NUM>, <NUM> is enclosed within the outer housing <NUM>. The plurality of lenses comprises at least one first lens <NUM>, <NUM>, <NUM> and at least one second lens <NUM>.

The method further comprises the step of arranging the at least one second lens <NUM> of the optical assembly <NUM> within the inner housing <NUM>, <NUM>, <NUM>. The at least one second lens <NUM> may comprise one or more lenses. In the embodiment shown in <FIG>, the at least one second lens <NUM> comprises three lenses 118a, 118b, 118c stacked one over the other on a common axis A-A such that no tolerance is present between the at least one second lens <NUM>.

The method further comprises the step of arranging the mask <NUM> on top of the at least one second lens <NUM>. In this present embodiment, the mask <NUM> is arranged on top of the lens 118a.

The method further comprises the step of bringing the at least one first lens <NUM>, <NUM>, <NUM> with an assembling tool <NUM> in such a way that the at least one first lens <NUM>, <NUM>, <NUM> faces the mask <NUM> and is axially aligned with at least one second lens <NUM>.

The method further comprises the step of fixing the at least one first lens <NUM>, <NUM>, <NUM> on the inner housing <NUM>, <NUM>, <NUM> by using the assembling tool <NUM> to obtain a closed-fit arrangement of the at least one first lens <NUM>, <NUM>, <NUM>, the mask <NUM> and the at least one second lens <NUM>. The at least one first lens <NUM>, <NUM>, <NUM>, the mask <NUM> and the at least one second lens <NUM> are arranged on a common axis A-A.

The method further comprises the step of arranging a printed circuit board (PCB) <NUM> on top of the at least one first lens <NUM>, <NUM>, <NUM>. The PCB <NUM> has at least one light source <NUM> facing the at least one first lens <NUM>, <NUM>, <NUM>.

The method further comprises the step of disposing an encapsulant <NUM> over the PCB <NUM>, the inner housing <NUM>, <NUM>, <NUM> and the outer housing <NUM> to obtain the logo lamp device <NUM>, <NUM>, <NUM>.

<FIG> illustrate sectional views of the logo lamp device <NUM> of <FIG> and <FIG> showing the assembly of the logo lamp device <NUM> of <FIG> and <FIG>, particularly the assembly of at least one first lens <NUM> on the inner housing <NUM> by using an assembling tool <NUM>. As shown in <FIG>, the at least one second lens <NUM> having three lenses 118a, 118b, 118c and the mask <NUM> are arranged in the inner housing <NUM>. <FIG> also shows the at least one first lens <NUM> being arranged on the inner housing <NUM> in unassembled state. The at least one first lens <NUM> comprises a protrusion <NUM> for holding a holder <NUM> of the assembling tool <NUM>. The holder <NUM> of the assembling tool <NUM> comprises a constriction <NUM> configured to be attached to the protrusion <NUM> of the at least one first lens <NUM> during assembly. <FIG> illustrates an intermediate state in which the at least one first lens <NUM> is pushed down in the inner housing <NUM> by the assembling tool <NUM> but not snap-fitted completely. <FIG> illustrates an assembled state in which the at least one first lens <NUM> is further pushed down and snap-fitting of the at least one first lens <NUM> and the inner housing <NUM> is completed. After fitting the at least one first lens <NUM> on the inner housing <NUM>, the assembling tool <NUM> is removed. The PCB <NUM> is then configured on the at least one first lens <NUM>, and the encapsulant <NUM> is arranged on the PCB <NUM>, the inner housing <NUM> and the outer housing <NUM> to obtain the fully assembled logo lamp device <NUM>.

<FIG> shows an illustrative example of a logo projection by the logo lamp device <NUM>, <NUM>, <NUM> and the arrangement of the logo lamp device <NUM>, <NUM>, <NUM> on a vehicle <NUM>. The logo lamp device <NUM>, <NUM>, <NUM> is mounted on a mounting location of the vehicle <NUM>. In this embodiment, the logo lamp device <NUM>, <NUM>, <NUM> is mounted on the door of the vehicle <NUM>. In other embodiments, one or more logo lamp device <NUM>, <NUM>, <NUM> may be mounted on the vehicle <NUM> at the mounting location selected from a group at the front portion, at the rear portion, on a side portion, on front bumper, on the rear bumper, on a left door and on a right door of the vehicle <NUM>.

Claim 1:
A logo lamp device (<NUM>, <NUM>, <NUM>), in particular for a vehicle (<NUM>), comprising
• an inner housing (<NUM>, <NUM>, <NUM>) and an outer housing (<NUM>), the inner housing (<NUM>, <NUM>, <NUM>) and the outer housing (<NUM>) having an open end (<NUM>);
• an encapsulant (<NUM>) configured opposite to the open end (<NUM>) of the inner housing (<NUM>, <NUM>, <NUM>) and the outer housing (<NUM>);
• a printed circuit board (PCB) (<NUM>) enclosed within the inner housing (<NUM>, <NUM>, <NUM>);
• at least one light source (<NUM>) connected to the PCB (<NUM>) and enclosed within the inner housing (<NUM>, <NUM>, <NUM>); and
• an optical assembly (<NUM>) having plurality of lenses, wherein the plurality of lenses comprises at least one first lens (<NUM>, <NUM>, <NUM>) and at least one second lens (<NUM>);
characterized by
at least one retaining mechanism configured between the at least one first lens (<NUM>, <NUM>, <NUM>) and the inner housing (<NUM>, <NUM>, <NUM>), wherein the at least one first lens (<NUM>, <NUM>, <NUM>) is configured to push the at least one second lens (<NUM>) against the inner housing (<NUM>, <NUM>, <NUM>).