Lighting device

Abstract

This invention provides a lighting device including a diffuser, a housing, a lamp holder, a heat sink, and a light source plate. The diffuser is shell-shaped and includes an open bottom. The housing includes a housing body, an open top, and an open bottom. The lamp holder is shell-shaped and includes a lamp holder body and an open top. The diffuser is detachably connected to the top of the housing, the lamp holder is detachably connected to the bottom of the housing, the heat sink is disposed within the internal space of the housing and is detachably connected to the housing, and the light source plate is detachably connected to the housing or the heat sink. Accordingly, the user can disassemble these components of the lighting device for post-processing.

Description

Technical Field

[0001] This utility model relates to the field of lighting devices, and in particular to a lamp. Background Technology

[0002] In traditional lighting fixtures (such as lamps), users typically discard the entire unit after use. Therefore, the manufacturing process usually doesn't specifically design for the detachability of the individual components, and not all components are designed to be detachably assembled. Consequently, the components of this type of lighting fixture generally cannot be processed separately. Utility Model Content

[0003] To overcome the aforementioned deficiencies in the prior art, this utility model proposes a lighting device, including a diffuser, a housing, a lamp holder, a heat sink, and a light source plate. The diffuser is shell-shaped and includes an open bottom. The housing includes a housing body, an open top, and an open bottom. The lamp holder is shell-shaped and includes a lamp holder body and an open top. The diffuser is detachably connected to the top of the housing, and the lamp holder is detachably connected to the bottom of the housing. The heat sink is disposed within the internal space of the housing and is detachably connected to the housing. The light source plate is detachably connected to either the housing or the heat sink. Accordingly, the user can disassemble these components of the lighting device for post-processing.

[0004] Furthermore, the diffuser is a plastic diffuser, and / or the housing is a plastic housing, and / or the lamp holder is a metal lamp holder, and / or the heat sink is a metal heat sink. Accordingly, these components of the lighting device can be processed separately, allowing components made of the same material to be grouped together for post-processing after disassembly.

[0005] Furthermore, the diffuser includes a bottom periphery at its bottom and an annular connector extending from the bottom periphery of the diffuser, and the housing includes a top periphery at its top and a connecting fitting formed at the top periphery of the housing, wherein, in the state where the diffuser is connected to the housing, the annular connector is positioned in the internal space of the housing and connected to the connecting fitting. Accordingly, detachable connection of the diffuser and the housing can be facilitated.

[0006] Furthermore, the housing includes a first through-hole formed on the housing body, the first through-hole being adjacent to the top periphery of the housing, and the annular connector includes a first break portion to form a first open groove. The diffuser includes a first resilient snap-fit ​​extending from the bottom periphery of the diffuser at the first open groove. A first protrusion is formed on the first resilient snap-fit ​​that matches the shape of the first through-hole, wherein the first protrusion of the first resilient snap-fit ​​can snap into the first through-hole. Accordingly, convenient assembly and disassembly of the diffuser and the housing can be achieved.

[0007] Furthermore, the annular connector includes a hook extending radially outward, and the connecting fitting is at least one first protrusion extending radially inward from the housing body, wherein the hook can engage with the at least one first protrusion. Accordingly, while enabling convenient assembly and disassembly of the diffuser and housing, assembly stability can be ensured.

[0008] Furthermore, the annular connector includes a second break to form a second open groove, and the housing includes a limiting rib extending radially inward from the housing body at the top periphery of the housing for insertion into the second open groove. Accordingly, positioning indications can be provided for the installation of the diffuser and the housing, thereby improving assembly accuracy.

[0009] Furthermore, the annular connector includes an external thread, and the mating component has an internal thread formed on the housing, wherein the internal thread can engage with the external thread. This ensures secure assembly while allowing for easy disassembly and reassembly of the diffuser and housing.

[0010] Furthermore, the heat sink includes an annular flange, and the housing includes an annular boss extending radially inward from the housing body and at least one second protrusion, wherein the annular flange can engage between the annular boss and the at least one second protrusion. This enables convenient assembly and disassembly of the heat sink and the housing.

[0011] Furthermore, the radiator is cup-shaped, and includes an annular flange formed at its top. This facilitates the manufacture of the radiator.

[0012] Furthermore, the housing includes at least one first connecting post fixed to the housing body and extending axially within the internal space of the housing. A first screw hole is formed at the top of the first connecting post, and the light source plate includes at least one first through hole. The first connecting post can extend through the heat sink to the light source plate and align with the first through hole, allowing a screw to pass through the first through hole and be screwed into the first screw hole. This enables convenient assembly and disassembly of the light source plate and the housing.

[0013] Furthermore, the light source plate contacts the annular flange. This improves heat dissipation.

[0014] Furthermore, the heat sink includes an annular wall extending perpendicularly to the annular flange from its outer periphery, wherein the annular wall and the annular flange together form an annular receiving portion, and the light source board can be connected to the annular receiving portion by an interference fit. This enables convenient assembly and disassembly of the light source board and the heat sink.

[0015] Furthermore, the housing includes a bottom periphery at its bottom and an annular connector formed at the bottom periphery of the housing, with at least one third break forming a third open groove on the annular connector. The lamp holder includes a top periphery at its top and at least one radially inwardly extending boss at the top periphery of the lamp holder. When the housing and the lamp holder are connected, the annular connector is positioned within the internal space of the lamp holder, and the extending boss is inserted into the third open groove. This improves the assembly accuracy of the housing and the lamp holder.

[0016] Furthermore, the lamp holder includes a second through hole formed on the lamp holder body, the second through hole being adjacent to the top periphery of the lamp holder, and a second protrusion formed on the annular connector that matches the shape of the second through hole, wherein the second protrusion can be engaged with the second through hole. Accordingly, convenient assembly and disassembly of the housing and the lamp holder can be achieved.

[0017] This invention also proposes a lighting device including a diffuser, a housing, a heat sink, and a light source. The diffuser is disc-shaped. The housing includes a housing body, an open top, and a bottom wall opposite the top. The diffuser is detachably connected to the interior space of the housing, and the heat sink is disposed in the interior space of the housing and detachably connected to the housing. Accordingly, the user can disassemble these components of the lighting device for post-processing.

[0018] Furthermore, the diffuser is a plastic diffuser, and / or the housing is a plastic housing, and / or the heat sink is a metal heat sink. Accordingly, these components of the lighting device can be processed separately, allowing components made of the same material to be grouped together for post-processing after disassembly.

[0019] Furthermore, the diffuser includes a diffuser body and at least one insertion protrusion formed on the sidewall of the diffuser body, and the housing includes at least one insertion groove formed on the inner side of the housing body. The diffuser is rotatable in a first rotational direction to insert the insertion protrusion into the insertion groove, and is rotatable in a second rotational direction opposite to the first rotational direction to disengage the insertion protrusion from the insertion groove. This allows for convenient assembly and disassembly of the diffuser and housing.

[0020] Furthermore, the housing includes a third through-hole formed on the housing body, and the diffuser includes a diffuser body and a second elastic snap-fit ​​member extending perpendicularly to the diffuser body. A third protrusion is formed on the second elastic snap-fit ​​member that matches the shape of the third through-hole, wherein the third protrusion of the second elastic snap-fit ​​member can snap into the third through-hole. Accordingly, convenient assembly and disassembly of the diffuser and housing can be achieved.

[0021] Furthermore, the diffuser includes at least one recess formed in the sidewall of the diffuser body, and the housing includes at least one third protrusion extending radially inward from the housing body, wherein the third protrusion can engage with the recess. Accordingly, a robust assembly can be ensured while allowing for convenient assembly and disassembly of the diffuser and housing.

[0022] Furthermore, the housing includes at least one snap-fit ​​block formed on the bottom wall. The snap-fit ​​block includes a snap-fit ​​block body and a spring arm extending inwardly from the snap-fit ​​block body. The radiator is cup-shaped and includes at least one notch on the bottom wall of the radiator. The snap-fit ​​block body can be inserted into the notch, and the spring arm can abut against the bottom wall of the radiator. Accordingly, convenient assembly and disassembly of the radiator and the housing can be achieved.

[0023] Furthermore, the housing includes at least one second connecting post fixed to the bottom wall and extending axially within the internal space of the housing body. A second threaded hole is formed at the top of the second connecting post, and the heat sink includes at least one second through hole. The second connecting post extends to the heat sink and aligns with the second through hole, allowing a screw to pass through the second through hole and be screwed into the second threaded hole. This enables convenient assembly and disassembly of the heat sink and the housing.

[0024] This utility model also proposes a lighting device, comprising: a metal lamp holder for connecting to an external power source; a housing detachably connected to the metal lamp holder; a metal heat sink installed inside the housing and detachably connected to the housing, wherein the housing and the heat sink form an internal space for accommodating a driving circuit; a light source module including a circuit board and a light-emitting element mounted on the circuit board, and the light source module being detachably connected to the housing; and a diffuser for diffusing the light emitted by the light source module, and the diffuser being detachably connected to the housing. Accordingly, the user can disassemble these components of the lighting device for post-processing.

[0025] Furthermore, the metal lamp holder is mounted on the outside of the housing, and the metal heat sink and the metal lamp holder are made of the same metal. Accordingly, these components of the lighting device can be processed separately, allowing components made of the same material to be grouped together for post-processing after disassembly. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and constitute a part of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0027] Figure 1 This is a schematic perspective view of the lighting device according to the first embodiment of the present invention;

[0028] Figure 2 It is shown schematically. Figure 1 An exploded perspective view of the lighting device shown.

[0029] Figure 3 It is shown schematically. Figure 2 An exploded sectional view of the lighting device shown.

[0030] Figure 4 It is shown schematically. Figure 1 A perspective view of a portion of the lighting fixture shown, with the diffuser removed;

[0031] Figure 5 It is shown schematically. Figure 4 An exploded perspective view of this part of the lighting device shown;

[0032] Figure 6 It is shown schematically. Figure 4 A partial exploded perspective view of this part of the lighting device shown;

[0033] Figure 7This is a schematic perspective view of the lighting device according to the second embodiment of the present invention;

[0034] Figure 8 This is a perspective view schematically illustrating a variant of the lighting device according to a second embodiment of the present invention; and

[0035] Figure 9 It is shown schematically. Figure 8 An exploded perspective view of a portion of the lighting device shown.

[0036] List of reference numerals

[0037] Lighting fixture 100, 100'

[0038] Diffuser 1, 1'

[0039] Annular connector 11

[0040] First open slot 111

[0041] Hook 112

[0042] Second open slot 113

[0043] First flexible snap-fit ​​component 12

[0044] First protrusion 121

[0045] Diffuser body 11'

[0046] 12' Plug

[0047] Second flexible snap-fit ​​13'

[0048] Third protrusion 131'

[0049] Shell 2, 2'

[0050] Shell body 21, 21'

[0051] First perforation 22

[0052] First bump 23

[0053] Limiting rib 24

[0054] 25 ring-shaped boss

[0055] Second bump 26

[0056] First connecting post 27

[0057] First screw hole 271

[0058] 28 ring connectors

[0059] Third open slot 281

[0060] Second protrusion 282

[0061] Bottom wall 22'

[0062] Socket 23'

[0063] Third perforation 24'

[0064] Third bump 25'

[0065] 26' SIM card

[0066] 261' of the snap-fit ​​block

[0067] 262' spring arm

[0068] Second connecting post 27'

[0069] Second screw hole 271'

[0070] Lamp holder 3

[0071] Lamp head body 31

[0072] Extended boss 32

[0073] Second perforation 33

[0074] Radiator 4, 4'

[0075] Annular flange 41

[0076] Annular wall 42

[0077] Gap 41'

[0078] Second through hole 42'

[0079] Light source board 5

[0080] First through hole 51 Detailed Implementation

[0081] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0082] In the following detailed description, reference is made to the accompanying drawings, which form a part of this specification, in which specific embodiments of the present invention are illustrated by way of example. Regarding the drawings, directional terms such as “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” and “rear” are used with reference to the orientation of the drawings described. Since the components of the embodiments of the present invention can be positioned in many different orientations, the directional terms are for illustrative purposes only and are not intended to be limiting. It should be understood that other embodiments can be used, and structural or logical changes can be made without departing from the scope of the present invention. Therefore, the following detailed description should not be construed as limiting, and the present invention is defined by the appended claims.

[0083] refer to Figures 1 to 6 The figure illustrates a lighting device 100 according to a first embodiment of the present invention. The lighting device 100 generally includes a diffuser 1, a housing 2, a lamp holder 3, a heat sink 4, and a light source plate 5. Specifically, as shown, the diffuser 1 can be shell-shaped, such as a round shell, a square shell, etc., and the diffuser 1 can include an open bottom for connection to the housing 2. The housing 2 can include a housing body 21, an open top, and an open bottom for connection to the diffuser 1 and the lamp holder 3, respectively. The lamp holder 3 can be shell-shaped and includes a lamp holder body 31 (for connecting to an external power source) and an open top for connection to the housing 2.

[0084] These components of the lighting device 100 are detachably connected to each other, wherein the diffuser 1 is detachably connected to the top of the housing 2, the lamp holder 3 is detachably connected to the bottom of the housing 2, the heat sink 4 is disposed in the internal space of the housing 2 and is detachably connected to the housing 2, and the light source plate 5 is detachably connected to the housing 2 or the heat sink 4.

[0085] These components of the lighting fixture 100 can be made of different materials; for example, the diffuser 1 can be a plastic diffuser, the housing 2 can be a plastic housing, the lamp holder 3 can be a metal lamp holder, and / or the heat sink 4 can be a metal heat sink. Therefore, when recycling the lighting fixture 100, for example, these components need to be processed separately.

[0086] The diffuser 1 may include a bottom periphery at its bottom and an annular connector 11 extending from the bottom periphery of the diffuser 1, and the housing 2 may include a top periphery at its top and a connecting fitting formed at the top periphery of the housing 2. When the diffuser 1 and the housing 2 are connected, the annular connector 11 is positioned in the internal space of the housing 2 and connected to the connecting fitting.

[0087] In one embodiment, the housing 2 may include a first through-hole 22 formed on the housing body 21, the first through-hole 22 being adjacent to the top periphery of the housing 2. The annular connector 11 may include a first break to form a first open slot 111. The diffuser 1 includes a first resilient snap-fit ​​member 12 extending from the bottom periphery of the diffuser 1 at the first open slot 111, the first resilient snap-fit ​​member 12 having a first protrusion 121 that mates with the shape of the first through-hole 22, wherein the first protrusion 121 of the first resilient snap-fit ​​member 12 can snap into the first through-hole 22. Accordingly, with the diffuser 1 and housing 2 assembled together, the user can release the lock by simply pressing the first protrusion 121 inward to separate the diffuser 1 and housing 2.

[0088] Furthermore, the annular connector 11 may include a radially outwardly extending hook 112, and the connecting fitting may be at least one first protrusion 23 extending radially inwardly from the housing body 21, wherein the hook 112 can engage with at least one first protrusion 23. Accordingly, the diffuser 1 and the housing 2 can be securely assembled by the engagement of the hook 112 with the first protrusion 23. Preferably, the hook 112 and / or the first protrusion 23 may be made of an elastic material to facilitate assembly and disassembly. As shown, the hook 112 may be a partial annular hook formed on the annular connector 11, and the number of such hooks may be one or more. In particular, multiple first protrusions 23 may engage with a single hook 112 or multiple hooks 112. In the case of multiple first protrusions 23, these first protrusions 23 may be arranged at equal intervals in the circumferential direction.

[0089] Furthermore, the annular connector 11 may include a second break to form a second open groove 113. The housing 2 may include a limiting rib 24 extending radially inward from the housing body 21 at the top periphery of the housing 2 for insertion into the second open groove 113. The form of the limiting rib 24 is not specifically limited; for example, it may be a single rib or a plurality of ribs spaced apart from each other.

[0090] Alternatively, the annular connector 11 may include an external thread, and the connecting mating part may be an internal thread formed on the housing 2, wherein the internal thread can engage with the external thread. This arrangement also facilitates the assembly and disassembly of the diffuser 1 and the housing 2.

[0091] In one embodiment, the heat sink 4 may include an annular flange 41, and the housing 2 may include an annular boss 25 extending radially inward from the housing body 21 and at least one second protrusion 26, wherein the annular flange 41 is engageable between the annular boss 25 and the at least one second protrusion 26. Preferably, the second protrusion 26 may be made of an elastic material to facilitate assembly and disassembly. In the case of having multiple second protrusions 26, these second protrusions 26 may be arranged at equal intervals in the circumferential direction.

[0092] Specifically, the radiator 4 can be cup-shaped, and the radiator 4 can include an annular flange 41 formed at its top.

[0093] Alternatively, the housing 2 may include at least one first connecting post 27 fixed to the housing body 21 and extending axially within the internal space of the housing 2, with a first screw hole 271 formed at the top of the first connecting post 27, and the light source plate 5 may include at least one first through hole 51. The first connecting post 27 can extend through the heat sink 4 to the light source plate 5 and align with the first through hole 51, so that a screw can pass through the first through hole 51 and be screwed into the first screw hole 271. Preferably, the light source plate 5 can contact the annular flange 41.

[0094] Furthermore, the heat sink 4 may include an annular wall 42 extending from the outer periphery of the annular flange 41 and perpendicular to the annular flange 41, wherein the annular wall 42 together with the annular flange 41 can form an annular receiving portion, and the light source plate 5 can be connected to the annular receiving portion by interference fit.

[0095] In one embodiment, the housing 2 may include a bottom periphery at its bottom and an annular connector 28 formed at the bottom periphery of the housing 2, wherein at least one third break is formed on the annular connector 28 to form a third open groove 281. The lamp holder 3 may include a top periphery at its top and at least one radially inwardly extending boss 32 at the top periphery of the lamp holder 3, wherein, in the state where the housing 2 and the lamp holder 3 are connected, the annular connector 28 is positioned within the internal space of the lamp holder 3 and the extending boss 32 is inserted into the third open groove 281. Figure 6 Preferably, two extended bosses 32 are shown, which are arranged opposite to each other in the circumferential direction.

[0096] Furthermore, the lamp holder 3 may include a second through hole 33 formed on the lamp holder body 31, the second through hole 33 being adjacent to the top periphery of the lamp holder 3, and a second protrusion 282 that matches the shape of the second through hole 33 may be formed on the annular connector 28, wherein the second protrusion 282 can be engaged in the second through hole 33. Preferably, the second through hole 33 may be centrally positioned in the circumferential direction between two extending protrusions 32.

[0097] refer to Figures 7 to 9 The figure shows a lighting device 100' according to a second embodiment of the present invention. The lighting device 100' generally includes a diffuser 1', a housing 2', a heat sink 4', and a light source. In particular, as shown, the diffuser 1' may be disc-shaped, and the housing 2' may include a housing body 21' and an open top and a bottom wall 22' opposite to the top.

[0098] These components of the lighting device 100' are detachably connected to each other, wherein the diffuser 1' is detachably connected to the interior space of the housing 2', and the heat sink 4' is disposed in the interior space of the housing 2' and is detachably connected to the housing 2'.

[0099] These components of the lighting fixture 100' can be made of different materials; for example, the diffuser 1' can be a plastic diffuser, the housing 2' can be a plastic housing, and / or the heat sink 4' can be a metal heat sink. Therefore, when recycling the lighting fixture 100', for example, these components need to be processed separately.

[0100] In one embodiment, such as Figure 7 As shown, the diffuser 1' may include a diffuser body 11' and at least one insertion protrusion 12' formed on the sidewall of the diffuser body 11', and the housing 2' may include at least one insertion groove 23' formed on the inner side of the housing body 21'. The diffuser 1' is rotatable in a first rotational direction to insert the insertion protrusion 12' into the insertion groove 23', and is rotatable in a second rotational direction opposite to the first rotational direction to disengage the insertion protrusion 12' from the insertion groove 23'. In the case of multiple insertion protrusions 12' and multiple insertion grooves 23', these insertion protrusions 12' may be arranged at equal intervals in the circumferential direction, and the insertion grooves 23' may also be arranged at equal intervals in the circumferential direction accordingly. Accordingly, the user can assemble and disassemble the diffuser 1' simply by rotating it in opposite directions.

[0101] Alternatively, such as Figure 8 As shown, the housing 2' may include a third perforation 24' formed on the housing body 21', and the diffuser 1' may include a diffuser body 11' and a second elastic latching member 13' extending perpendicularly to the diffuser body 11'. A third protrusion 131' is formed on the second elastic latching member 13', which is shaped to match the third perforation 24', and the third protrusion 131' of the second elastic latching member 13' can be latched into the third perforation 24'. Accordingly, when the diffuser 1' and the housing 2' are assembled together, the user can easily release the lock by pressing the third protrusion 131' inward to separate the diffuser 1' and the housing 2'.

[0102] Furthermore, the diffuser 1' may include at least one recess formed in the sidewall of the diffuser body 11', and the housing 2' may include at least one third protrusion 25' extending radially inward from the housing body 21', wherein the third protrusion 25' can engage with the recess. In the case of having a plurality of third protrusions 25', these third protrusions 25' may be arranged at equal intervals in the circumferential direction.

[0103] In one embodiment, such as Figure 9 As shown, the housing 2' may include at least one snap-fit ​​block 26' formed on the bottom wall 22'. The snap-fit ​​block 26' includes a snap-fit ​​block body 261' and a spring arm 262' extending inwardly from the snap-fit ​​block body 261'. The radiator 4' may be cup-shaped and may include at least one notch 41' on the bottom wall 22' of the radiator 4'. The snap-fit ​​block body 261' can be inserted into the notch 41' and the spring arm 262' can abut against the bottom wall 22' of the radiator 4'. Accordingly, when the radiator 4' and the housing 2' are assembled together, the user can unlock and separate the radiator 4' and the housing 2' by simply pressing the spring arm 262'.

[0104] Alternatively, the housing 2' may include at least one second connecting post 27' fixed to the bottom wall 22' and extending axially in the internal space of the housing body 21', with a second screw hole 271' formed at the top of the second connecting post 27', and the radiator 4' including at least one second through hole 42', wherein the second connecting post 27' can extend to the radiator 4' and be aligned with the second through hole 42' so that a screw can pass through the second through hole 42' and be screwed into the second screw hole 271'.

[0105] Furthermore, this utility model also proposes a lighting device, which includes: a metal lamp holder for connecting to an external power source; a housing detachably connected to the metal lamp holder; a metal heat sink installed inside the housing and detachably connected to the housing, wherein the housing and the heat sink form an internal space for accommodating a driving circuit; a light source module including a circuit board and a light-emitting element mounted on the circuit board, and the light source module is detachably connected to the housing; and a diffuser for diffusing the light emitted by the light source module, and the diffuser is detachably connected to the housing.

[0106] Specifically, the metal lamp holder is mounted on the outside of the housing, and the metal heat sink mounted inside the housing and the metal lamp holder mounted on the outside of the housing are made of the same metal.

[0107] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lighting device comprising a diffuser (1), a housing (2), a lamp holder (3), a heat sink (4), and a light source plate (5), wherein the diffuser (1) is shell-shaped and includes an open bottom, the housing (2) includes a housing body (21) and an open top and an open bottom, and the lamp holder (3) is shell-shaped and includes a lamp holder body (31) and an open top, characterized in that, The diffuser (1) is detachably connected to the top of the housing (2). The lamp holder (3) is detachably connected to the bottom of the housing (2). The radiator (4) is disposed in the internal space of the housing (2) and is detachably connected to the housing (2), and The light source board (5) can be detachably connected to the housing (2) or the heat sink (4).

2. The lighting device according to claim 1, characterized in that, The diffuser (1) is a plastic diffuser, and / or The housing (2) is a plastic housing, and / or The lamp holder (3) is a metal lamp holder, and / or The radiator (4) is a metal radiator.

3. The lighting device according to claim 1 or 2, characterized in that, The diffuser (1) includes a bottom periphery at its bottom and an annular connector (11) extending from the bottom periphery of the diffuser (1), and The housing (2) includes a top periphery at its top and a connecting fitting formed at the top periphery of the housing (2), wherein, in the state where the diffuser (1) is connected to the housing (2), the annular connecting member (11) is positioned in the internal space of the housing (2) and connected to the connecting fitting.

4. The lighting device according to claim 3, characterized in that, The housing (2) includes a first perforation (22) formed on the housing body (21), the first perforation (22) being adjacent to the top periphery of the housing (2), and the annular connector (11) including a first break to form a first open groove (111), the diffuser (1) including a first resilient snap-fit ​​(12) extending from the bottom periphery of the diffuser (1) at the first open groove (111), the first resilient snap-fit ​​(12) having a first protrusion (121) that matches the shape of the first perforation (22), wherein the first protrusion (121) of the first resilient snap-fit ​​(12) can snap into the first perforation (22).

5. The lighting device according to claim 4, characterized in that, The annular connector (11) includes a hook (112) extending radially outward, and the connecting fitting is at least one first protrusion (23) extending radially inward from the housing body (21), wherein the hook (112) can engage with the at least one first protrusion (23).

6. The lighting device according to claim 5, characterized in that, The annular connector (11) includes a second break portion to form a second open groove (113), and The housing (2) includes a limiting rib (24) extending radially inward from the housing body (21) at the top periphery of the housing (2) for insertion into the second open slot (113).

7. The lighting device according to claim 4, characterized in that, The annular connector (11) includes external threads, and The connecting fitting is an internal thread formed on the housing (2), wherein the internal thread can be threadedly engaged with the external thread.

8. The lighting device according to claim 1 or 2, characterized in that, The radiator (4) includes an annular flange (41), and The housing (2) includes an annular boss (25) extending radially inward from the housing body (21) and at least one second protrusion (26), wherein the annular flange (41) can engage between the annular boss (25) and the at least one second protrusion (26).

9. The lighting device according to claim 1 or 2, characterized in that, The radiator (4) is cup-shaped and includes an annular flange (41) formed at its top.

10. The lighting device according to claim 9, characterized in that, The housing (2) includes at least one first connecting post (27) fixed to the housing body (21) and extending axially in the internal space of the housing (2), wherein a first screw hole (271) is formed at the top end of the first connecting post (27), and The light source plate (5) includes at least one first through hole (51), wherein the first connecting post (27) can extend through the heat sink (4) to the light source plate (5) and be aligned with the first through hole (51) so that a screw can pass through the first through hole (51) and be screwed into the first screw hole (271).

11. The lighting device according to claim 10, characterized in that, The light source plate (5) is in contact with the annular flange (41).

12. The lighting device according to claim 9, characterized in that, The heat sink (4) includes an annular wall (42) extending from the outer periphery of the annular flange (41) and perpendicular to the annular flange (41), wherein the annular wall (42) together with the annular flange (41) forms an annular receiving portion, and The light source board (5) can be connected to the annular receiving part by interference fit.

13. The lighting device according to claim 1 or 2, characterized in that, The housing (2) includes a bottom periphery at its bottom and an annular connector (28) formed at the bottom periphery of the housing (2), wherein at least one third break is formed on the annular connector (28) to form a third open groove (281), and the lamp head (3) includes a top periphery at its top and at least one radially inwardly extending boss (32) at the top periphery of the lamp head (3), wherein, in the state where the housing (2) is connected to the lamp head (3), the annular connector (28) is positioned in the internal space of the lamp head (3) and the extending boss (32) is inserted into the third open groove (281).

14. The lighting device according to claim 13, characterized in that, The lamp head (3) includes a second through hole (33) formed on the lamp head body (31), the second through hole (33) being adjacent to the top periphery of the lamp head (3), and a second protrusion (282) forming on the annular connector (28) that matches the shape of the second through hole (33), wherein the second protrusion (282) can be snapped into the second through hole (33).

15. A lighting device comprising a diffuser (1'), a housing (2'), a heat sink (4'), and a light source, wherein the diffuser (1') is disc-shaped, and the housing (2') comprises a housing body (21') and an open top and a bottom wall (22') opposite to the top, characterized in that, The diffuser (1') can be detachably connected to the interior space of the housing (2'), and The radiator (4') is disposed in the internal space of the housing (2') and is detachably connected to the housing (2').

16. The lighting device according to claim 15, characterized in that, The diffuser (1') is a plastic diffuser, and / or The housing (2') is a plastic housing, and / or The radiator (4') is a metal radiator.

17. The lighting device according to claim 15 or 16, characterized in that, The diffuser (1') includes a diffuser body (11') and at least one insertion protrusion (12') formed on the sidewall of the diffuser body (11'), and The housing (2') includes at least one insertion slot (23') formed on the inner side of the housing body (21'), wherein the diffuser (1') is rotatable in a first rotational direction to insert the insertion protrusion (12') into the insertion slot (23'), and is rotatable in a second rotational direction opposite to the first rotational direction to disengage the insertion protrusion (12') from the insertion slot (23').

18. The lighting device according to claim 15 or 16, characterized in that, The housing (2') includes a third perforation (24') formed on the housing body (21'), and The diffuser (1') includes a diffuser body (11') and a second elastic snap-fit ​​member (13') extending perpendicularly to the diffuser body (11'). A third protrusion (131') is formed on the second elastic snap-fit ​​member (13') to match the shape of the third through hole (24'). The third protrusion (131') of the second elastic snap-fit ​​member (13') can snap into the third through hole (24').

19. The lighting device according to claim 18, characterized in that, The diffuser (1') includes at least one recess formed inwardly on the side wall of the diffuser body (11'), and The housing (2') includes at least one third protrusion (25') extending radially inward from the housing body (21'), wherein the third protrusion (25') can engage with the groove.

20. The lighting device according to claim 15 or 16, characterized in that, The housing (2') includes at least one snap-fit ​​block (26') formed on the bottom wall (22'), the snap-fit ​​block (26') including a snap-fit ​​block body (261') and a spring arm (262') extending inwardly from the snap-fit ​​block body (261'), and The radiator (4') is cup-shaped and includes at least one notch (41') on the bottom wall (22') of the radiator (4'), the snap-fit ​​block body (261') can be inserted into the notch (41') and the spring arm (262') can abut against the bottom wall (22') of the radiator (4').

21. The lighting device according to claim 15 or 16, characterized in that, The housing (2') includes at least one second connecting post (27') fixed to the bottom wall (22') and extending axially within the interior space of the housing body (21'), with a second screw hole (271') formed at the top of the second connecting post (27'). The radiator (4') includes at least one second through hole (42'), wherein the second connecting post (27') extends into the radiator (4') and is aligned with the second through hole (42') so that a screw can pass through the second through hole (42') and be screwed into the second screw hole (271').

22. A lighting device, characterized in that, The lighting device includes: A metal lamp holder for connecting to an external power source; A housing that is detachably connected to the metal lamp holder; A metal radiator is installed inside the housing and detachably connected to the housing, wherein the housing and the radiator form an internal space for accommodating a drive circuit. A light source module includes a circuit board and light-emitting elements mounted on the circuit board, and the light source module is detachably connected to the housing; and A diffuser for diffusing light emitted by the light source module, and the diffuser is detachably connected to the housing.

23. The lighting device according to claim 22, characterized in that, The metal lamp holder is mounted on the outside of the housing, and The metal heat sink and the metal lamp holder are made of the same metal.

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