A lamp with an improved structure design

Abstract

A lamp comprising a lighting element configured to emit light; a housing portion and a cover portion. The housing portion is configured to receive the cover portion. The cover portion is configured to fit into the housing portion. The cover portion comprises at least one wedge disposed on a side of the cover portion, each wedge being configured to secure the cover portion to the housing portion by a frictional force.

Description

[0001] A lamp with an improved structure design

[0002] FIELD OF THE INVENTION

[0003] The present invention relates to the field of lighting, and in particular to lamp assemblies.

[0004] BACKGROUND OF THE INVENTION

[0005] There is an ongoing desire to improve artificial lighting arrangements, which are used to provide artificial light in a wide variety of environments, such as in domestic, industrial and / or public settings.

[0006] One type of lamp that is used to provide artificial lighting is a lamp with a plastic cover portion, e.g., that enables the transmission of radio frequencies therethrough, that fits into a metal housing portion to define an assembly of the lamp. After such a lamp is assembled, it is important that parts fit together without significant gaps or deviations at least to reduce or avoid light leakage. Furthermore, the presence of any loose parts after assembly is undesirable, as this would result in an undesirable noise when shaken (e.g., which may mislead an individual into believing the lamp is broken) and / or increases a risk of damage during transit.

[0007] One traditional approach for ensuring that parts of a lamp fit tightly together is to use glue in order to fill the gaps between the parts and bond them together. It has been historically believed that, without gluing, the lamps might contain gaps between the parts and / or become loose (e.g., during transit). However, the use of glue has significant disadvantages, such as: glue overflow, difficulty of placing glue on steep surfaces, contamination of the surfaces on which glue is deposited and / or increased likelihood of damage of electronic devices by volatilization of glue due to heating up of the lamp.

[0008] There is an ongoing desire to improve the design structure of such lamps.

[0009] SUMMARY OF THE INVENTION

[0010] The invention is defined by the claims.

[0011] According to examples in accordance with an aspect of the invention, there is provided a lamp comprising a lighting element configured to emit light; a housing portion, a cover portion and a lens. The housing portion is configured to receive the cover portion. The housing portion comprises a gap sized to fit the cover portion. The cover portion is configured to fit into the gap of the housing portion. When the cover portion is fitted to the housing portion, the cover portion and the housing portion together form an assembly that provides a flush surface. The lens comprises an internal surface configured to contact the flush surface. The cover portion comprises at least one wedge disposed on a side of the cover portion, each wedge being configured to secure the cover portion to the housing portion by a frictional force.

[0012] The present disclosure provides a lamp having an improved design structure with a fully clamped assembly which is free of glue. In particular, the proposed approach provides a compact lamp having no or negligible gaps when the different constituents of the lamp are joined together, without the need for adhesive or glue. By avoiding the use of glue, a lamp is provided with less contamination and / or contamination damage of the surfaces on which glue is deposited and decreased likelihood of damage of any electronic devices by volatilization of glue due to heating up of the lamp. The contact between the internal surface of the lens and the flush surface ensures that the cover portion being further secured in the gap of the housing portion.

[0013] The cover portion may be configured to permit the transmission of electromagnetic signals therethrough, such as radio frequencies.

[0014] In some examples, the at least one wedge comprises two wedges, and wherein the two wedges have a mirror symmetry with respect to each other with respect to a symmetric plane. This reduces a likelihood that the cover portion will deviate from its position when joined together with the housing portion.

[0015] The cover portion may be configured to slide into the housing portion in a sliding direction so as to be secured thereto.

[0016] In some examples, the thickness of each wedge decreases in the sliding direction; and optionally wherein the thickness of each wedge linearly decreases in the sliding direction. This allows for the cover portion to fit tightly into the housing portion and to allow for an easy guidance of the cover portion into the housing portion. This further allows to make the lamp compact without any loosening parts of the lamp.

[0017] In some examples, the housing portion is die cast or formed from overmoulded plastic with a metal core, and the cover portion is made from a radio-frequency transmissive material such as a polymer. These materials may create a strong frictional force to secure the cover portion to the housing portion. In some examples, the lamp has a central axis that extends in a direction of the lamp, and each wedge is oriented as to provide an interaction contact force with the housing portion in a direction towards the central axis. Such force allows for the cover portion and the housing portion to better fit each other without discernible gaps.

[0018] In some examples, the flush surface of the assembly may define a light exit window for (any) light emitted by the lighting element. The assembly may enclose the lighting element.

[0019] In some examples, the cover portion comprises a first engaging element and the housing portion comprises a second engaging element configured to fit in the first engaging element of the cover portion. The second engaging element may be opposite the light exit window.

[0020] In some examples, the housing portion and the cover portion may comprise a lens slot configured to engage with a rim of the lens to thereby secure the lens to the assembly.

[0021] In some examples, the inner surface supports a plurality of elements. The plurality of elements may be configured to be deformed by contacting the flush surface, when the lens slot engages with the rim of the lens. This allows for an even distribution of deformation along the internal surface, which facilitates the tight positioning of the lens and the housing portion.

[0022] The lamp may further comprise a cap configured to fit into the housing portion. The housing portion may further comprise an aperture configured to receive the cap, wherein the aperture is opposite the light exit window. The housing portion may further comprise at least one slot. The cap may comprise at least one clasp configured to engage with the at least one slot. The cap may be secured to the housing portion by engaging the at least one clasp with the at least one slot.

[0023] The cap may carry or comprise one or more electrical conductors or connectors for electrically connecting the lighting element to an external electrical source or driver. For instance, the electrical conductor(s) may be configured to electrically connect the lighting element to a mains supply.

[0024] In some examples, the at least one clasp comprises two clasps and the at least one slot comprises two slots. The two slots and the two clasps may have a mirror symmetry with respect to each other with respect to a symmetric plane. This allows for the lamp to be stable and the force necessary for sliding the cap into the housing portion even. This further prevents the assembly of the cap and the housing portion and the cover portion from being in an offset position. In some examples, the lighting element comprises one or more light emitting diodes.

[0025] In some examples, the lamp is a MR16 spotlight bulb, with wireless control via signal through the cover portion which is a patch on its metallic housing.

[0026] These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment s) described hereinafter.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS

[0028] For a better understanding of the invention, and to show more clearly how it may be carried into effect, reference will now be made, by way of example only, to the accompanying drawings, in which:

[0029] Figure 1 is an exploded view of a lamp according to a proposed embodiment;

[0030] Figure 2 is an angled view of a cover portion of the lamp;

[0031] Figure 3 is a front view of the cover portion of the lamp;

[0032] Figure 4 is a top-down view of a housing portion of the lamp;

[0033] Figure 5 illustrates a technique for assembling the cover portion and the housing portion of the lamp according to an embodiment;

[0034] Figure 6 provides a top-down view of an assembled configuration of the cover portion and the housing portion of the lamp;

[0035] Figure 7 provides a front view of an assembled configuration of the cover portion and the housing portion of the lamp;

[0036] Figure 8 provides a bottom-up view of a lens for use with the proposed lamp;

[0037] Figure 9 illustrates a technique for assembling an assembly of the cover portion and the housing portion, and the lens;

[0038] Figure 10 illustrates a cross-sectional view of an assembly and the lens after assembly;

[0039] Figure 11 provides a top view of an assembled configuration of the assembly and the lens;

[0040] Figure 12 illustrates a cap for the lamp;

[0041] Figure 13 illustrates a technique for assembling the assembly and the cap;

[0042] Figure 14 provides a cross-sectional view of an assembly and cap after assembly;

[0043] Figure 15 is a view of an underside of an assembly and cap after assembly; and Figure 16 provides an enlarged cross-sectional view of a point of contact between the assembly and the cap after assembly.

[0044] DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The invention will be described with reference to the Figures.

[0046] It should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the apparatus, systems and methods, are intended for purposes of illustration only and are not intended to limit the scope of the invention. These and other features, aspects, and advantages of the apparatus, systems and methods of the present invention will become better understood from the following description, appended claims, and accompanying drawings. It should be understood that the Figures are merely schematic and are not drawn to scale. It should also be understood that the same reference numerals are used throughout the Figures to indicate the same or similar parts.

[0047] The invention provides a lamp comprising a lighting element configured to emit light; a housing portion and a cover portion. The housing portion is configured to receive the cover portion. The cover portion is configured to fit into the housing portion. The cover portion comprises at least one wedge disposed on a side of the cover portion, each wedge being configured to secure the cover portion to the housing portion by a frictional force. The lamp may further comprise a lens and a cap.

[0048] A herein proposed approach is based on a lamp having an improved design structure with a fully clamped assembly which is free of glue. This provides a compact lamp where there are no gaps when the different constituents of the lamp 100 are joined together. This also provides a lamp with less contamination and / or damages from contamination of the surfaces on which glue is deposited and decreased likelihood of damage of electronic devices by volatilization of glue due to heating up of the lamp through light generation by the lighting element.

[0049] Figure 1 is an exploded view of a lamp 100 according to a proposed approach. The lamp 100 comprises a lens 110, a lighting element, a housing portion 120, a cover portion 130 and a cap 190. The housing portion 120 is configured to receive the cover portion 130. The cover portion 130 is configured to fit into the housing portion 120. The cap 190 is also configured to fit into the housing portion 120. The lighting element is configured to generate light. Examples of suitable lighting elements are well known in the art, and include one or more light emitting diodes (LEDs).

[0050] The cover portion 130 may be configured to permit the transmission of electromagnetic signals therethrough, such as radio frequencies.

[0051] Figure 1 further illustrates a central axis Xc of the lamp 100.

[0052] Figure 2 is an angled view and Figure 3 is a front view of the cover portion 130 of the lamp 100.

[0053] For ease of explanation, Figure 3 also illustrates an axis Xi. The axis Xi is positioned to be parallel with a central axis of the cover portion 130, e.g., extend in a parallel direction as the central axis of the cover portion 130. More particularly, the axis Xi is configured to be perpendicular with a horizontal axis of the cover portion 130.

[0054] The cover portion 130 comprises at least one wedge 135 disposed on a side 132 of the cover portion 130, each wedge 135 being configured to secure the cover portion 130 to the housing portion 120 by a frictional force.

[0055] The cover portion 130 may further comprise a first engaging element 131 for engaging with the housing portion 120, as later explained.

[0056] As illustrated in Figures 2 and 3, the cover portion 130 may comprise (at least) two wedges 135, 136. The wedges 135, 136 may have a mirror symmetry with respect to each other with respect to the axis Xi. This reduces or prevents deviation from the optimal positioning of the cover portion 130 in the housing portion 120 when joined together.

[0057] Figure 4 is a top-down view of a housing portion 120 of the lamp 100.

[0058] The housing portion 120 may comprise a gap 125 sized to fit the cover portion 130, as illustrated in Figure 4. To assemble the housing portion 120 and the cover portion 130, the cover portion 130 is positioned within the gap of the housing portion 120, thereby forming an assembly 150. As later explained in detail, the wedge(s) 135, 136 of the cover portion 130 engage with (a surface of) the housing portion 120 using a frictional or interaction force to thereby secure the cover portion 130 to the housing portion 120 without the need for adhesive.

[0059] The housing portion 120 may also comprise a second engaging element 121 configured to fit in the first engaging element 131 of the cover portion 130 for improved securing between the cover portion 130 and the housing portion 120.

[0060] In some examples, the housing portion 120 is die cast or overmoulded plastic with a metal core. The cover portion 130 may be made from a radio-frequency transmissive material such as a polymer or any other type of non-conductive materials. The combination of the materials of the housing portion 120 and the cover portion 130 may create a strong frictional force to secure the cover portion 130 to the housing portion 120.

[0061] Figure 5 illustrates a technique for assembling the cover portion 130 and the housing portion 120 of the lamp 100.

[0062] The cover portion 130 may be configured to slide into the housing portion 120 in a sliding direction Ds so as to be secured thereto, as illustrated in Figure 5. The direction Ds is represented by an arrow on Figure 5. In particular, sliding the cover portion 130 into the housing portion 120 brings the wedge(s) 135, 136 into contact with the housing portion 120, thereby causing them to engage with (a surface of) the housing portion 120, so as to secure the cover portion 130 to the housing portion 120.

[0063] More specifically, sliding the cover portion 130 into the housing portion 120 brings the wedge(s) 135, 136 into contact with a wedge-contacting surface 121 of the housing portion 120. A frictional force is created between the wedge(s) 135, 136 and the wedgecontacting surface 121 so as to engage the cover portion 130 to the housing portion 120.

[0064] The thickness of each wedge 135, 136 of the cover portion 130 may decrease in the sliding direction Ds. In preferred examples, the thickness of each wedge 135, 136 linearly decreases in the sliding direction Ds. This allows for the cover portion 130 to fit tightly into the housing portion 120 and allows for the easy guidance of the cover portion 130 into the housing portion 120. In particular, increased movement of the cover portion 130 in the sliding direction Ds will increase the frictional force between the wedge(s) 135, 136 and the housing portion 120, thereby facilitating a tight fit. This further allows to make the lamp 100 compact without any movements leading to rattling of the cover portion 130 with respect to the housing portion 120.

[0065] More particularly, the frictional force between the wedge(s) 135, 136 and the housing portion 120 increases a difficulty and / or force required to disengage the cover portion 130 from the housing portion 120 by a movement along the axis Xi, i.e., in a direction parallel to the central axis of the lamp.

[0066] With reference to Figures 2, 4 and 5, the housing portion 120 may further comprise a retaining surface 127. The retaining surface 127 is configured to engage with an outer surface 137 of the cover portion 130 to restrict or prevent a movement of the cover portion 130, with respect to the housing portion 120, in a direction perpendicular to the central axis.

[0067] In particular, after the cover portion 130 has been slid into the housing portion 120 in the sliding direction, the retaining surface 127 of the housing portion 120 may push against the outer surface 137 of the cover portion 130 in a direction perpendicular to the central axis Xc. This contributes to the frictional or interaction force between the wedge(s) 135, 136 of the cover portion 130 and the housing portion 120.

[0068] Put another way, the housing portion 120 may comprise a slot into which the cover portion 130 is able to slide, wherein the slot extends in a slot direction (here: parallel to the central axis Xc of the lamp). The bounds of the slot define the retaining surface 127 and the wedge-contacting surface 121. Movement of the cover portion 130 in a direction perpendicular to the direction of the slot is restricted or prevented by a contact force between the cover portion 130 and the retaining surface 127 and the wedge-contacting surface 121 (i.e., the bounds of the slot). Movement of the cover portion 130 in a direction parallel to the direction of the slot is restricted or prevented by the frictional force between the wedge(s) 135, 136 and the wedge-contacting surface 121 of the housing portion 120.

[0069] Figure 6 provides a top-down view of an assembled configuration of the cover portion 130 and the housing portion 120 of the lamp 100.

[0070] As illustrated in Figure 6 and Figure 7, the assembled configuration of the cover portion 130 and the housing portion 120 of the lamp 100 forming an assembly 150.

[0071] Figure 7 provides a front view of an assembled configuration of the cover portion 130 and the housing portion 120 of the lamp 100.

[0072] As illustrated in Figures 6 and 7, when the cover portion 130 is fitted to the housing portion 120, the cover portion 130 and the housing portion 120 together form an assembly 150 that provides a flush surface 155. This flush surface may define (e.g., the bounds of) a light exit window 160 for light emitted by the lighting element. The assembly 150 may enclose the lighting element.

[0073] Although not illustrated for the sake of illustrative clarity, the assembly 150 may enclose additional components such as electrical connectors, wires, control circuitry, driving circuitry and / or power circuitry. This allows for a more compact lamp by minimizing the number of securing means used to assemble the lamp 100, such as screws, bolts and / or glue / adhesive.

[0074] The lamp 100 may define a central axis Xc that extends in a direction of the lamp 100. Each wedge 135, 136 may be oriented as to provide an interaction contact force with the housing portion 120 in a direction towards the central axis Xc. Such force allows for the cover portion 130 and the housing portion 120 to better fit each other without discernible gaps.

[0075] As described above, the cover portion 130 comprises a first engaging element 131 and the housing portion 120 comprises a second engaging element 121 configured to engage with the first engaging element 131 of the cover portion 130. The second engaging element 121 may be opposite the light exit window 160. This allows for the cover portion 130 to further fit tightly into the housing portion 120 and further allows for the easy guidance of the cover portion 130 into the housing portion 120.

[0076] As best illustrated in Figures 6 and 7, the assembly 150 may be conical and may have a circular cross-section. However, alternative shapes for the assembly may include cylindrical, any regular or irregular prism (e.g., a rectangular prism), such that the cross- sectional shape of the assembly may be any regular or irregular shape.

[0077] Figure 8 provides a bottom-up view of a lens 110 for use with the proposed lamp.

[0078] The lens 110 may comprise an internal surface 170, the internal surface 170 configured to contact the flush surface 155 defined by the assembly 150.

[0079] As shown in Figure 8, the internal surface 170 may have a circular cross-section. However, alternative shapes for the internal surface 170 may include any regular or irregular prism (e.g., a rectangular prism), such that the cross-sectional shape of the internal surface 170 may be any regular or irregular shape and may match the shape of the assembly 150 in order to contact the flush surface 155.

[0080] The inner surface 170 may support a plurality of protruding elements 175, as illustrated in Figure 8. The plurality of protruding elements 175 may be configured to be deformed by contacting the flush surface 155 when a lens slot 156 engages with the rim of the lens 110, as later explained.

[0081] In some examples, the plurality of protruding elements 175 may be triangular prisms, which are evenly distributed on the internal surface 170. As illustrated in Figure 8, the triangular prisms may be (at least) 6 prisms which may be all positioned on the internal surface 170 so that the length of the prims is directed towards the centre of the internal surface 170. This allows for an even distribution of deformation along the internal surface 170, which facilitates the tight positioning of the lens 110 and the housing portion 120.

[0082] The protruding elements of the lens 100 may be made of any suitable elastomeric material or any other type of deformable material. Non-limiting examples of such materials are natural rubber, wax or silicon.

[0083] Figure 9 illustrates a technique for assembling an assembly 150 of the cover portion 130 and the housing portion 120, and the lens 110.

[0084] As illustrated in Figure 9 by an arrow, the lens 110 and the assembly 150 are put into contact by a downward force in order to form a portion of the lamp 100. Figure 10 illustrates a cross-sectional view of an assembly 150 and lens 110 after assembly.

[0085] For ease of explanation, Figure 10 also illustrates an axis Yi. The axis Yi is positioned to align with a horizontal axis of the assembled configuration. More particularly, the axis Yi is configured to be perpendicular with the central axis Xc.

[0086] Figure 11 provides a top view of an assembled configuration of the assembly 150 and the lens 110.

[0087] These views best illustrate the assembled configuration of the assembly 150 and lens 110, showing the deformation of the plurality of elements 175 when the internal surface 170 and the flush surface 155 are contacted.

[0088] As illustrated in Figure 10, the assembly 150 defined by the housing portion 120 and the cover portion 130 may comprise a lens slot 156 configured to engage with the rim of the lens 110 to thereby secure the lens 110 to the assembly 150. This allows for maintaining the lens 110 tightly on top of the assembly 150 and allows for preventing the separation of the lens 110 and the assembly 150.

[0089] As further illustrated in Figure 10, after the lens 110 and the assembly 150 are assembled, a (first) contact angle a may be defined between the top surface of lens 110, opposite the internal surface 170, and the horizontal axis Yi. The (first) contact angle a may be between 120° and 150°, e.g., 135°, preventing or reducing the likelihood of the lens 110 and the assembly 150 separating.

[0090] Figure 12 illustrates a cap 190 for the lamp 100.

[0091] The cap 190 may comprise at least one clasp 195, as illustrated in Figure 12.

[0092] Figure 13 illustrates a technique for assembling the assembly 150 and the cap 190.

[0093] As discussed above and illustrated in Figure 13, the cap 190 is configured to fit into the housing portion 120. The housing portion 120 may further comprise an aperture 180 configured to receive the cap 190. The aperture 180 is opposite the light exit window 160.

[0094] The cap 190 may comprise at least one clasp 195 configured to engage with the at least one slot 185. The cap 190 may be secured to the housing portion 120 by sliding the at least one clasp 195 into the at least one slot 185.

[0095] As illustrated in Figure 13, the cap 190 may be inserted by the application of an upward force, showed by an upward arrow. Thus, in a preferred embodiment, the cap 190 may be a push cap. Although not illustrated for the sake of illustrative clarity, the cap 190 may carry or comprise one or more electrical conductors or connectors for electrically connecting the lighting element to an external electrical source or driver. For instance, the electrical conductor(s) may be configured to electrically connect the lighting element of the lamp 100 to a main supply.

[0096] Figure 14 provides a cross-sectional view of the assembly 150 and the cap 190 after assembly.

[0097] As shown in Figure 14, the housing portion 120 may comprise at least one slot 185.

[0098] Figure 15 is a view of an underside of the assembly 150 and cap 190 after assembly.

[0099] As illustrated in Figure 14, the at least one clasp 195 comprises two clasps 195 and the at least one slot 185 comprises two slots 185. The two slots 185 and the two clasps 195 may have a mirror symmetry with respect to each other with respect to a symmetric plane, shown in Figure 14 as the central axis Xc. This allows for the lamp 100 to be stable and for the force necessary for sliding the cap 190 into the housing portion 120 to be even. This further prevents the assembly of the cap 190 and the housing portion 120 and the cover portion 130 from being in an offset position.

[0100] Figure 16 provides an enlarged cross-sectional view of a point of contact between the assembly 150 and the cap 190 after assembly of zone A in Figure 14.

[0101] In particular, each slot 185 may define a contact surface 187 to which the clasp 195 of the cap 190 makes contact. The contact surface 187 may make a (second) contact angle P between with a horizontal axis Yr of the assembly 150, parallel to the horizontal axis Yi. In other words, the contact surface 187 defined by the slot 185 (with which the clasp 195 makes contact) may lie in a contact surface plane Z. An angle between the contact surface plane Z and any horizontal axis Yr of the assembly defines a (second) contact angle p. The (second) contact angle P may be between 120° and 150°, e.g., 135°, preventing or reducing the likelihood of the cap 190 and the assembly 150 separating. This further allows the securing of the cap 190 to the assembly 150 without the need of glue or other securing means.

[0102] The lamp 100 of the disclosure with the combination of the assembly 150, the lens 110 and the cap 190 of the invention provides a compact lamp having an improved design structure with a fully clamped assembly which is free of glue. Although not explicitly illustrated for the sake of clarity, the lamp may comprise additional components, e.g., driving circuitry, one or more mounts, sensing circuitry, monitoring circuitry, control circuitry and so on.

[0103] Variations to the disclosed embodiments may be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality.

[0104] The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. If the term "adapted to" is used in the claims or description, it is noted the term

[0105] "adapted to" is intended to be equivalent to the term "configured to". If the term "arrangement" is used in the claims or description, it is noted the term "arrangement" is intended to be equivalent to the term "system", and vice versa.

[0106] Any reference signs in the claims should not be construed as limiting the scope.

Claims

CLAIMS:

1. A lamp (100) comprising: a lighting element configured to emit light; a metallic housing portion (120) configured to receive a cover portion (130); wherein the housing portion 120 comprises a gap (125) sized to fit the cover portion (130); and a lens; the cover portion (130) configured to fit into the gap (125) of the housing portion; when the cover portion 130 is fitted to the housing portion (120), the cover portion (130) and the housing portion (120) together form an assembly (150) that provides a flush surface (155); wherein the lens (110) comprises an internal surface (170) configured to contact the flush surface (155); wherein the cover portion comprises at least one wedge (135, 136) disposed on a side (132) of the cover portion, each wedge being configured to secure the cover portion to the housing portion by a frictional force.

2. The lamp of claim 1, wherein the cover portion is configured to permit the transmission of electromagnetic signals therethrough.

3. The lamp of claim 1 or 2, wherein the at least one wedge comprises two wedges, and wherein the two wedges have a mirror symmetry with respect to each other with respect to a first symmetric plane (Xi).

4. The lamp of any of claims 1 to 3, wherein the cover portion is configured to slide into the housing portion in a sliding direction (Ds) so as to be secured thereto.

5. The lamp of any of claims 1 to 4, wherein a thickness of each wedge decreases in the sliding direction; and optionally wherein the thickness of each wedge linearly decreases in the sliding direction.

6. The lamp of any of claims 1 to 5, wherein: the housing portion is die cast or overmoulded plastic with a metal core; and / or the cover portion is made from a radio-frequency transmissive material such as a polymer.

7. The lamp of any of claims 1 to 6, wherein the lamp has a central axis (Xc) that extends in a direction of the lamp, and each wedge is oriented as to provide an interaction contact force with the housing portion in a direction towards the central axis.

8. The lamp of any of claims 1 to 7, wherein the flush surface defines a light exit window (160) for light emitted by the lighting element and wherein the assembly encloses the lighting element.

9. The lamp of claim 8, wherein the cover portion comprises a first engaging element (131); and the housing portion comprises a second engaging element (121) configured to fit in the first engaging element of the cover portion; wherein the second engaging element is opposite the light exit window.

10. The lamp of any of claims 1 to 9, wherein the housing portion and the cover portion comprise a lens slot (156) configured to engage with a rim of the lens to thereby secure the lens to the assembly (150).

11. The lamp of claim 1, wherein the inner surface (170) of the lens (110) supports a plurality of protruding elements (175) configured to be deformed by contacting the flush surface when the lens slot (156) engages with the rim of the lens.

12. The lamp of any of claims 1 to 11, further comprising a cap (190) configured to fit into the housing portion, wherein the housing portion further comprises an aperture (180) configured to receive the cap, wherein the aperture is opposite the light exit window; and at least one slot (185); the cap comprising at least one clasp (195) configured to engage with the at least one slot; andwherein the cap is secured to the housing portion by engaging the at least one clasp with the at least one slot.

13. The lamp of claim 12, wherein the at least one clasp comprises two clasps and the at least one slot comprises two slots; wherein the two slots and the two clasps have a mirror symmetry with respect to each other with respect to the central axis.

14. The lamp of any of claims 1 to 13, wherein the lighting element comprises one or more light emitting diodes.

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