CN209819312U

CN209819312U - Lighting lamp

Info

Publication number: CN209819312U
Application number: CN201920812709.XU
Authority: CN
Inventors: 吴洪戈
Original assignee: Huizhou Hanxing Photoelectric Technology Co Ltd
Current assignee: Huizhou Arrlux Optoelectronic Co ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2019-12-20
Anticipated expiration: 2029-05-31

Abstract

The utility model relates to an illumination lamp, it includes the lighting fixture and assembles at least one light source module in the lighting fixture inboard. Each light source module comprises a radiator, a circuit board, a cover plate and a fixing piece, wherein one surface of the circuit board is tightly attached to the other surface of the radiator, and a plurality of light sources are arranged on the circuit board. The fixing piece is connected with the radiator to press the cover plate on the radiator in a manner that the periphery of the cover plate is uniformly stressed. The utility model discloses a light source module's of illumination lamps and lanterns apron is compressed tightly on the radiator by the mode of the peripheral even atress of mounting with the apron to there is not stress concentration's position on the apron, even the apron becomes fragile and can not really appear splitting under salt fog or alkali fog environment for a long time.

Description

Lighting lamp

Technical Field

The utility model relates to a lamps and lanterns, in particular to illumination lamps and lanterns that are fit for outdoor use.

Background

The lighting lamp suitable for outdoor use has a very high requirement on waterproof performance, and the circuit board and the light source need to be fixed in a sealed space. A common lamp cover is generally made of plastic material, such as Polycarbonate (PC), and is fixed to the lamp holder by a plurality of screws, for example, the main lighting source cover of the chinese utility model having the patent application number of 201410074606.X and the application date of 2014, 3 months and 3 days is fixed to the first heat dissipation main body by a plurality of screws. However, common plastic materials such as PC materials are easy to become brittle and easy to crack in salt mist or alkali mist environments, the surface of the lampshade, particularly the periphery of a screw hole, is unevenly stressed by utilizing a mode of fixing the lampshade by a plurality of screws, and is always cracked or even broken after long-term use under stress, so that the lamp is sealed and ineffective, and the service life is greatly shortened.

Disclosure of Invention

An object of the utility model is to provide a lamp shade atress is even illumination lamps and lanterns.

The utility model provides an illumination lamp, includes lighting fixture and assembles at least one light source module in the lighting fixture inboard, and every light source module includes: a heat sink; one side of the circuit board clings to the radiator, and the other side of the circuit board is provided with a plurality of light sources; and a cover plate on which a plurality of optical lenses are formed. The lighting fixture further comprises: and the fixing piece is connected with the radiator and presses the cover plate on the radiator in a manner that the periphery of the cover plate is uniformly stressed.

Preferably, the heat sink is further provided with screw holes, the cover plate and the circuit board are provided with through holes corresponding to the screw holes, and the outer surface of the cover plate is further provided with a plurality of protrusions arranged on the periphery of the through holes; when the screw passes through the cover plate and the through hole on the circuit board and is screwed into the screw hole on the radiator, a gap exists between the nut of the screw and the plurality of bulges or the screw is only contacted with the plurality of bulges.

Preferably, the plurality of protrusions are spaced from the edge surrounding the through hole by a predetermined distance.

Preferably, the screw comprises the nut, a polish rod with a thread-free periphery extending from the center of the back of the nut, and a screw rod with a thread arranged on the periphery extending from the tail end of the polish rod; the screw rod corresponds to a screw hole on the radiator, and the outer diameter of the polish rod is larger than that of the screw rod; the distance between the screw rod and the position of the screw cap, which is contacted with the bulge, is equal to or greater than the distance between the surface of the heat radiator, which is contacted with the circuit board, and the surface of the bulge.

Preferably, a convex ring or a plurality of convex parts distributed along a circle with a polished rod as a center are formed on the back of the nut, a groove is formed on the inner side of the convex ring or the plurality of convex parts, the polished rod extends out from the middle part of the groove, and the convex ring or the plurality of convex parts are in contact with the plurality of protrusions on the cover plate.

As an embodiment, the heat sink includes: the heat exchanger comprises a first heat transfer plate attached to the lower surface of the circuit board, two second heat transfer plates extending from two sides of the lower surface of the first heat transfer plate, and a third heat transfer plate connecting the tail ends of the two second heat transfer plates; the first heat transfer plate is roughly in a rectangular plate shape, and two side walls serving as long sides of the first heat transfer plate are provided with sliding grooves which penetrate through the head and the tail; grooves or steps which are sunken upwards and downwards are formed on the long edges of the cover plate; the fixed piece comprises two oppositely arranged first sliders and two oppositely arranged second sliders; the first slider comprises a strip-shaped base plate and two sliding rails extending from two long edges of the base plate, one sliding rail is inserted into a sliding groove on the first heat transfer plate, the other sliding rail is pressed on a groove or a step of the cover plate from top to bottom, and the cover plate is pressed on the radiator in a manner that the two long edges of the cover plate are uniformly stressed; the second slider comprises a long pressing plate and two claw parts extending downwards from two ends of the pressing plate, the two claw parts of the second slider are respectively inserted into the two sliding grooves of the first heat transfer plate, and the short edge of the cover plate is pressed on the radiator in a uniform stress mode by the pressing plate.

Preferably, the second slide further comprises a baffle extending from the pressure plate towards the heat sink.

As an embodiment, each light source module comprises one heat sink, at least two circuit boards and at least two cover plates; each cover plate seals a circuit board between the cover plate and the radiator through a sealing rubber ring and a group of fixing pieces; each circuit board is provided with two power supply wiring terminals, a wire hole is formed in the position, close to each power supply wiring terminal, of the radiator, one end of a connecting wire for electrically connecting adjacent circuit boards is connected with one power supply wiring terminal of one circuit board, then extends to the back of the radiator from the wire hole nearby, and extends to and is connected with one power supply wiring terminal of the other circuit board from the other wire hole; the back of the radiator is fixed with a sealing block used for sealing the connecting wire and the corresponding wire hole, an annular groove used for containing a sealing rubber ring is formed in the sealing block, and the sealing block is fixed on the back of the radiator through the sealing rubber ring and a screw to seal the connecting wire and the corresponding wire hole.

As an implementation mode, a power supply terminal is arranged on the circuit board, a wire hole is formed in the position, close to the power supply terminal, of the radiator, a power supply wire penetrates through the wire hole through a sealing rubber seat, and the tail end of the power supply wire is connected with a first electric connector; a rubber seat for guiding is further fixed on the power line between the first electric connector and the sealing rubber seat; the rubber seat for guiding is columnar, and a convex edge is formed at one end of the rubber seat for guiding, which is close to the sealing rubber seat; the lamp holder is provided with a wire hole corresponding to the wire hole on the radiator, and the size of the wire hole on the lamp holder is smaller than that of the convex edge.

As an implementation mode, the end of the power line in the lamp holder is connected with a second electric connector, a rubber block is fixed at a position close to the second electric connector, and a plurality of finger parts extending outwards and away from the second electric connector are formed on the peripheral wall of the rubber block; the peripheral size of the rubber block is smaller than or equal to the size of the line hole, and the outward extending size of the finger part is larger than the size of the line hole; under the action of external force, the rubber block and the finger parts can pass through the wire holes.

In one embodiment, at least one of said second heat transfer plates is formed with a groove in a position adjacent to the third heat transfer plate.

The utility model discloses a light source module's of illumination lamps and lanterns apron is compressed tightly on the radiator by the mode of the peripheral even atress of mounting with the apron to there is not stress concentration's position on the apron, even the apron becomes fragile and can not really appear splitting under salt fog or alkali fog environment for a long time.

Drawings

Fig. 1 is a perspective view of a lighting fixture according to a first embodiment, in which a light source module is taken out.

Fig. 2 is a perspective view of the light source module taken out from fig. 1.

Fig. 3 is an exploded view of the light source module shown in fig. 2.

FIG. 4 is a schematic view of an embodiment of an anti-bird landing member.

Fig. 5 is a schematic structural view of a power interface component for electrically connecting a lamp holder of the lighting fixture and a light source module according to the first embodiment.

Fig. 6 is a perspective view from the rear side of the cover plate and screws of fig. 3.

Fig. 7 is an enlarged view of a portion a in fig. 2.

Fig. 8 is an enlarged view of the screw of fig. 6.

Fig. 9 is a perspective view of a light shield assembly according to an embodiment.

Fig. 10 is a perspective view of a rear side view of the fixing member of the light source module in fig. 2.

Fig. 11 is a perspective view of a spacer of the light source module of fig. 2.

Fig. 12 is a perspective view of a lighting fixture according to a second embodiment.

Fig. 13 is a perspective view of a light source module of the lighting fixture of fig. 12.

Fig. 14 is an exploded view of a heat sink of the light source module of fig. 13.

Fig. 15 is a perspective view of a rear side view of one of the second sliders of the fixing member of the light source module of fig. 13.

Detailed Description

The lighting device of the present invention will be described in detail with reference to the following embodiments and accompanying drawings.

Referring to fig. 1, in a first embodiment, the illumination lamp of the present invention mainly includes a lamp holder 10 and at least one light source module 20 assembled inside the lamp holder 10. The lighting fixture shown in fig. 1 includes six light source modules, one light source module 20 being removed for easy viewing of the fixture 10. The light source module 20 is modular, and can be arranged between two fixed tubes 11 of the lamp holder 10 in parallel, and lighting lamps with different sizes and different powers can be formed by arranging different numbers of light source modules. The structure and function of the light source module 20 will be described in detail below.

Referring to fig. 2 and fig. 3, the light source module 20 mainly includes a heat sink 21, a circuit board 22 having one surface closely attached to the heat sink 21, a cover plate 23, and a fixing member 24. Wherein, the fixing piece 24 is connected with the radiator 21 to press the cover plate 23 on the radiator 21 in a manner that the periphery of the cover plate is uniformly stressed.

For convenience of description, the light emitting direction side of the lighting fixture is defined as front/front, and the side facing away from the light emitting direction is defined as back/back.

The heat sink 21 has a flat fixing surface 2111. Specifically, in the present embodiment, the heat sink 21 mainly uses an aluminum profile with a certain bend, and includes a rectangular first heat transfer plate 211 having a flat fixing surface 2111, two second heat transfer plates 212 and 212' integrally extending from two sides (referring to a long side of the first heat transfer plate) of the back surface of the first heat transfer plate 211, and a third heat transfer plate 213 connecting ends of the two second heat transfer plates. Wherein the outer side surfaces of the second heat transfer plates 212, 212 'are undulated, and the lengths of the second heat transfer plates 212, 212' and the third heat transfer plates 213 are smaller than the first heat transfer plate 211, so that the third heat transfer plates 213 cover a part of the first heat transfer plate 211 when viewed perpendicularly to the lower surface of the first heat transfer plate, so that both ends of the first heat transfer plate 211 are in a state of protruding out of the heat sink 21. Both end portions of the first heat transfer plate 211, which extend toward the second heat transfer plate and the third heat transfer plate, are formed with wire holes 2112, 2113 and fixing holes 2115, 2116, which are located further outside than the wire holes 2112, 2113, respectively, wherein the wire hole 2112 and the fixing hole 2115 are located at the one end of the first heat transfer plate 211, and the wire hole 2113 and the fixing hole 2116 are located at the other end of the first heat transfer plate 211, which extends. A positioning hole (or positioning recess) 2117 is also formed between the wire hole 2113 and the fixing hole 2116. At least one positioning hole 2118 (or a positioning recess) and two screw holes 2119 are formed in a fixing surface 2111 of the first heat transfer plate 211 at a portion which does not protrude from the second heat transfer plate and the third heat transfer plate.

The first heat transfer plate 211 has two side walls as long sides, and slide grooves 2114 are formed through the first and second sides. Specifically, the sliding groove 2114 is recessed from a side wall of the first heat transfer plate 211 toward the other side wall opposite thereto, and penetrates the entire side wall in the direction in which the long side extends.

Specifically, a groove 2121 is formed on a long side of one of the second heat transfer plates 212 connected to the third heat transfer plate 213 for detachably fixing one or more bird dropping prevention members as shown in fig. 4, which may be formed by bending a metal wire and has an elastic portion inserted and fixed in the groove 2121 and a straight portion extending from the elastic portion toward the rear of the heat sink. More specifically, the long side 2131 of the third heat transfer plate 213 is slightly bent toward the first heat transfer plate 211 to form a hook, the second heat transfer plate 212 extends from the side of the lower surface of the first heat transfer plate 211 toward the long side 2131 of the third heat transfer plate 213, is bent at a predetermined distance, for example, 0.8 to 3 cm, from the third heat transfer plate 213, extends toward the second heat transfer plate 212 ', for example, but not limited to, 0.5 to 5 cm, is bent to extend toward the third heat transfer plate 213, and is connected to the third heat transfer plate 213 near the long side 2131 thereof, so that the second heat transfer plate 212 has a groove 2121 recessed toward the second heat transfer plate 212' and extending along the long side (and also along the long side 2131) of the second heat transfer plate 212. The grooves of this structure do not destroy the structural integrity of the back of the heat sink. Under the condition that the radiator is favorable for improving the radiating efficiency and strengthening the strength of the radiator, dust, leaves, sand, stones and bird droppings can be effectively prevented from being accumulated on the back of the radiator for a long time. When assembling a plurality of light source modules, all leave the space between a plurality of light source modules 20, above-mentioned space forms the convection current groove between the light source module 20 of difference, allows the air to get into between the second heat transfer plate to can utilize the chimney effect that hot-air rises cold air and supplyes to let the air produce the convection current and directly take away the heat on second heat transfer plate and the third heat transfer plate, thereby improve the radiating effect. In addition, the corrugated undulations on the second heat transfer plate increase the effective heat dissipation area of the heat transfer plate, which is more efficient.

One surface (back surface) of the circuit board 22 is in close contact with the fixing surface 2111 of the heat sink 21, and the other surface (front surface) is provided with a plurality of light sources 221. In the present embodiment, the circuit board 22 is substantially (substantially or approximately, determined by common knowledge) in a rectangular plate shape, and both the width and the length thereof are smaller than those of the fixing surface 2111 of the first heat transfer plate 211. The circuit board 22 is also provided at each of its two ends (near its short sides) with a power connection terminal 222, 222' electrically connected to the electrical wires within the circuit board. The wire holes 2112, 2113 on the first heat transfer plate 211 of the heat sink 21 are close to the power supply terminals 222, 222'. The power cord 31 for supplying power to the light source 221 is sleeved on a sealing rubber seat 32 with the shape matched with the wire hole 2112, one end of the power cord is connected with the power connection terminal 222, the other end of the power cord is connected with a first electric connector 34, and the sealing rubber seat 32 is inserted into the wire hole 2112 and seals a gap between the wire hole 2112 and the power cord 31. A guiding rubber seat 33 is also fixed on the power line between the first electric connector 34 and the sealing rubber seat 32. The guiding rubber seat 33 includes a column 332 and a protruding edge 331 extending outward from an end of the column away from the first electrical connector 34 (i.e., an end close to the sealing rubber seat 32). The size of the end of the cylinder 332 near the first electrical connector 34 is smaller than the size of the wire hole 111 of the lamp holder 10, and the size of the end near the protruding edge is equal to or larger than the size of the wire hole 111. In this embodiment, the column 332 has a shape with an outer circumference gradually increasing from the end to the convex edge 331, and the outer circumference of the rubber base 33 near the convex edge 331 is larger than the size of the wire hole 111 of the lamp holder 10. Referring to fig. 1 and 5, the fixing tube 11 of the lamp holder 10 is formed with wire holes 111, 111' corresponding to the wire holes 2112 of the heat sink 21, and the size of the wire hole 111 of the lamp holder 10 is smaller than that of the protruding edge 331. The end of the power line 31 ' in the lamp holder 10 is connected to a second electrical connector 34 ', a rubber block 32 ' is fixed at a position close to the second electrical connector 34 ', and a plurality of finger portions 321 extending outward and away from the second electrical connector are formed on the outer peripheral wall of the rubber block 32 '. The plurality of fingers are formed in a claw shape. Preferably, the rubber block 32' and the finger portion 321 are made of silicone, the outer circumference of the rubber block is smaller than or equal to the size of the wire hole 111 on the lamp holder 10, the outward extending size of the finger portion 321 is larger than the size of the wire hole 111 on the lamp holder, and the rubber block and the finger portion can pass through the wire hole 111 under the action of external force. The second electrical connector 34' is sized such that it can pass through the wire hole 111. Therefore, before the light source module 20 is fixed on the lamp holder 10, the second electric connector 34 ' is kept exposed outside the lamp holder 10 by pulling the second electric connector 34 ' and the rubber block 32 ' out of the wire hole 111, after the first electric connector 34 is connected with the second electric connector 34 ', the finger parts 321 are made of soft silica gel materials and can be inserted into the wire hole 111, then the rubber seat 33 for guiding is inserted into the wire hole 111, sealing treatment of the wire hole 111 is realized, and meanwhile, the power wire 31 ' can be prevented from being extruded between the radiator 21 and the lamp holder 10 in the assembling process. Preferably, the end of the block 32 'abuts the end of the second electrical connector 34' to prevent the power cord from bending therebetween. The end of the rubber guide 33 is fitted around the outer circumference of one end of the first electrical connector 34 to prevent the power line therebetween from being bent. Through holes are formed in the circuit board 22 at positions opposite to the wire holes 2112, 2113, the fixing holes 2115, 2116, the positioning hole 2118, and the screw hole 2119 in the heat sink, wherein the size of the through hole 223 opposite to the screw hole 2119 is larger than the inner diameter of the screw hole 2119.

Referring to fig. 3, 6 and 7, the cover plate 23 is rectangular in shape, and has a width and a length greater than those of the circuit board 22, and optical lenses 236 are formed at positions opposite to the plurality of light sources 221 of the circuit board 22, so as to perform predetermined optical processing on the light emitted from the light sources 221, thereby achieving a specific light effect. The cover plate 23 is preferably made of a chemically stable PC material. A groove or step 231 recessed from the top to the bottom (from the front to the rear) is formed on the long side of the front surface of the cover plate 23. Preferably, the groove or step 231 extends through one end of the long side and does not extend through the other end of the long side to achieve the limit. Positioning posts 232 and 233 are formed on the back surface of the cover plate 23 at positions corresponding to the positioning holes 2117 and 2118. The cover plate 23 is formed with through holes 234 at positions corresponding to the screw holes 2119. The perimeter of the cover 23 adjacent the cover defines a groove 235 for receiving a waterproof rubber grommet 2351, the groove 235 surrounding all of the lens 236, the positioning post 233 and the through hole 234. The positioning posts 232 are located outside the slots 235 near the edge of the cover plate 23. The cover plate 23 is also formed at its rear surface with a protruding wall 237 surrounding the through hole 234, and a waterproof silicone ring 238 is provided at the inner side of the protruding wall 237. The size of the through hole 223 of the circuit board 22 is larger than the outer diameter of the convex wall 237, after the screw 239 passes through the through hole 234 and the through hole 223 and is screwed into the screw hole 2119 of the heat sink 21, the end of the convex wall 237 and the waterproof silicone ring 238 are in surface contact with the fixing surface 2111 of the heat sink 21, and the inner side of the silicone ring 238 is in contact with the outer side of the screw 239, thereby sealing the through hole 234 and the screw hole 2119, so that moisture cannot enter the space defined by the cover plate 23 and the fixing surface 2111 of the heat sink 21 through the through hole 234 and the screw hole 2119.

In this embodiment, the cover 23 is fixedly connected to the heat sink 21 by the fasteners 24, rather than by the screws 239 pressing the cover 23 against the heat sink, so that the screws 239 are received in the holes 2119 with the nuts 2391 contacting the surface of the cover 23. at the same time, as a double safety, to prevent stress concentration around the through holes 234, the cover 23 is further formed with a plurality of protrusions 2341 (four in this embodiment) disposed around the through holes 234, uniformly distributed around the through holes 234, and spaced 0.05 ~ 0.25 cm from the edges of the through holes 234, so that the nuts 2391 of the screws 239 contact only the plurality of protrusions 2341 after the screws 239 are threaded through the through holes in the cover and the circuit board into the holes 2119 in the heat sink 21.

Further, as shown in fig. 8, the screw 239 includes a nut 2391, a peripheral unthreaded polish rod 2392 extending from the center of the back of the nut, and a peripheral threaded rod 2393 extending from the end of the polish rod and provided with a thread. The screw 2393 corresponds to the screw 2119 of the heat sink 21, and the outer diameter of the polish rod 2392 is larger than that of the screw 2393. The distance from the screw 2393 to the position of the nut 2391 where the protrusion 2341 contacts is equal to or greater than the distance from the fixing surface 2111 of the heat sink to the surface of the protrusion 2341, so that it is ensured that the protrusion 2341 contacts the nut 2391 or has a gap therebetween after the screw 2393 is completely screwed into the screw hole 2119. In this embodiment, a protruding ring 2394 is further formed at the edge of the back surface of the nut 2391, a groove 2395 is formed on the inner side of the protruding ring 2394, and the polish rod 2392 extends from the middle of the groove 2395. Thus, when the nut contacts the protrusions 2341, only the protruding ring 2394 is ensured to contact the plurality of protrusions 2341 on the cover plate.

The lighting fixture of the present invention may further include an optional shade assembly 25, as shown in fig. 9, which may include a generally rectangular stator 251 and reflector 252 extending from the long side of the stator 251. A clearance 2511 is formed in the fixing piece 251 at a position corresponding to the lens 236 of the cover plate 23, and clearance 2512 and 2513 are also formed at positions corresponding to the through hole 234 and the projection 2341. In addition, the thickness of the fixing plate 251 is equal to or less than the height of the protrusion 2341 relative to the surface of the cover plate 23. In use, the shade assembly 25 can be secured to the cover plate 23 using the screws 239. Due to clearance 2513, cap 2391 of screw 239 is in surface contact with boss 2341 only or with both boss and retaining plate 251. The reflector 252 is used to reflect the light emitted from the cover 23 toward the light shielding assembly 25 to a predetermined direction, which is at a predetermined angle with respect to the fixing piece.

The fixing member 24 is used in connection with the heat sink 21 to press the cover plate 23 against the heat sink 21 in such a manner that the periphery of the cover plate is uniformly forced. Referring to fig. 3 and fig. 10, in the present embodiment, the fixing member 24 includes two first sliders 241 and two second sliders 242. The first slider 241 includes an elongated substrate 2411 and two sliding rails 2412 and 2413 extending from two long sides of the substrate, wherein one sliding rail 2412 is inserted into the sliding slot 2114 on the side wall of the first heat transfer plate 211, and the other sliding rail 2413 is inserted into the groove or step 231 of the cover plate 23 and pressed on the bottom of the groove or step 231 from top to bottom. By reasonably setting the width of the substrate 2411, the first slider 241 can press the cover plate onto the heat sink in a manner that two long sides of the cover plate are uniformly stressed. It can be understood that the two sliding rails 2412, 2413 each have a relatively protruding portion for engaging with the sliding slot 2114 and a specific portion of the groove or step 231.

The second slider 242 includes an elongated pressing plate 2421, two claw portions 2422 extending downward from both ends of the pressing plate, and a stopper 2423 extending from one of the long sides of the pressing plate toward the heat sink 21. The two claw parts 2422 of the second slider 242 are inserted into the two sliding grooves 2114 of the first heat transfer plate 211, similar to the sliding rails 2412 and 2413, respectively, and by properly setting the size of the claw parts 2422, the pressing plate 2421 can press the short edge of the cover plate 23 on the radiator 21 in a uniformly stressed manner. The stop 2423 is used for positioning during assembly to prevent the second slider 242 from slipping out of position.

In addition, the screws 214 and 215 are inserted into the screw holes 115 of the lamp holder 10 after passing through the fixing holes 2115 and 2116 at the two ends of the heat sink 21, so as to fixedly connect the light source module 20 and the lamp holder 10. The second slider 242 is limited by the position of the fixing holes 2115 and 2116 and the size of the nuts of the screws 214 and 215, and the second slider 242 is prevented from being dislocated in long-term use.

In addition, the screws 214 and 215 are sleeved with a gasket 217 as shown in fig. 11, and the gasket 217 is disposed between the radiator 21 and the fixing tube 11 of the lamp holder 10. The gasket 217 is made of metal, and has a groove 2171 formed on a surface facing the fixed pipe 11, and a non-metal gasket 218, preferably a latex gasket, having a thermal conductivity much lower than that of the metal material is disposed in the groove 2171. Therefore, after the light source module is connected to the lamp holder, heat is conducted between the light source module and the lamp holder only through the screws 241 and 215 and the edge part of the gasket 217 surrounding the groove 2171, so that only a very small part of heat on the light source module is conducted to the lamp holder, and if the power supply module is arranged on the lamp holder, the power supply module cannot be influenced.

The utility model discloses a light source module is by setting up at apron 23 below groove 235 inboard waterproof rubber ring 2351, setting up at the inboard waterproof silica gel circle 238 of protruding wall 237, set up the gluey seat 32 in the line hole 2112 of radiator 21, set up the sealing member 216 in the line hole 2113 of radiator 21 with circuit board 23 seal in the confined space that apron 23 and radiator 21 enclose. Because the cover plate is fixed on the radiator in a way of uniformly stressing the periphery of the cover plate, the cover plate is not easy to crack even if becoming brittle due to being exposed to alkaline environment, and the service performance can be ensured. The screws 239 fixed on the cover plate are mainly used for fixing optional accessories, such as the shading assembly 25, and are not used for fastening the cover plate on the heat sink in practical use, so that nuts of the screws 239 only contact the protrusions 2341 around the through holes of the cover plate, and even gaps exist between the nuts and the protrusions 2341, so that the edges of the cover plate defining the through holes 234 cannot be cracked due to stress concentration. Even if a certain force is applied to the protrusions 2341 by the screws 239 due to production tolerances, the plurality of protrusions 2341 protruding from the surface of the cover plate can transmit the force to the surroundings, reducing and eliminating the stress concentration state, and preventing the cover plate from being cracked.

In this embodiment, each light source module 20 includes a heat sink 21, and a circuit board 22 and a cover plate 23 are fixed to the heat sink 21 by a set of fixing members 24. Although two power terminals 222, 222 'are provided on the circuit board 22, only one of the power terminals 222 is used to connect with the power line in the lamp holder, and the other power terminal 222' is left unused as a standard component. The wire hole 2113 of the heat sink 21 corresponding to the power connection terminal 222' may be sealed by a silicone seal 216. The sealing member 216 can also be used as a pressure port for the airtight test of the light source module 20.

Referring to fig. 12 to 15, in the second modified embodiment of the above embodiment, a plurality of light source modules 20' are also fixed in the lamp holder of another lighting fixture. Each light source module 20 ' includes a heat sink 21 ' and a circuit board and a cover plate 23 ' are fixed to the heat sink 21 ' by two sets of fixing members 24 '. The two circuit boards and the two cover plates 23' are identical to the circuit board 22 and the cover plate 23 in the first embodiment, and are not described herein again. The heat sink 21 ' differs from the heat sink 21 of the first embodiment in that the length thereof is longer, and four corresponding wire holes are provided for four wire holes on two corresponding circuit boards, wherein two wire holes 2112 ' and 2113 ' near the two ends are used for passing through a power supply wire and inserting a sealing member similar to the sealing member 216 of the first embodiment, and two wire holes 2112 ″ and 2113 ″ near the middle are used for passing through wires connecting the adjacent circuit boards. A through hole 21191 is also formed between the wire holes 2112 "and 2113". Similar to the embodiment, the two wire holes 2112 "and 2113" are located inside the sealing rubber under the two cover plates 23 ', respectively, so that the openings of the wire holes 2112 "and 2113" located at the front of the heat sink 21 ' are located in the sealed space of the cover plate 23 '. The through holes 21191 are located outside the sealing rubber ring under the two cover plates 23'. The openings of the wire holes 2112 'and 2113' on the back side of the first heat transfer plate 211 'of the heat sink 21' are sealed by a sealing block 217 and an associated sealing rubber ring 2171. Specifically, the sealing block 217 is an aluminum plate made of the same material as the heat sink, and has a groove 2172 for passing wires formed on the surface facing the back of the first heat transfer plate 211' and an annular groove 2173 surrounding the groove 2172. A sealing rubber ring 2171 is disposed in the recess 2173. A screw hole 2174 is formed outside the recess 2173. The sealing block 217 may be fixed to the back of the first heat transfer plate 211 ' by screws 2175 so as to seal the openings of the wire holes 2112 "and 2113" located at the back of the first heat transfer plate 211 ' of the heat sink 21 '. One end of a connecting wire for electrically connecting adjacent circuit boards is connected to one of the power terminals of one of the circuit boards, and then extends from the nearby wire hole 2112 ' or 2113 ' to the back surface of the heat sink 21 ', and extends from the other wire hole 2113 ' or 2112 ' to one of the power terminals of the other circuit board and is connected thereto.

The fixing member 24 ' is similar to the fixing member 24 of the first embodiment, except that two sets of fixing members 24 ' share one second sliding member 242 ', and the short sides of the adjacent cover plate 23 ' are pressed by one second sliding member 242 ', so that the cover plate is pressed on the heat sink in a manner that the two short sides of the cover plate are uniformly stressed. Specifically, the second slider 242 'includes an elongated pressing plate 2421' having a wider width, two claw portions 2422 'extending downward from both ends of the pressing plate, and a baffle 2423' extending from the middle portion of the pressing plate toward the heat sink 21 'between the two cover plates 23'. The baffle 2423 'divides the long pressing plate 2421' and the claw part 2422 'into a left part and a right part respectively, and is used for pressing down the short sides of the adjacent cover plates 23'.

Therefore, when the modularized circuit board and the cover plate need to be expanded, the size of the radiator only needs to be adjusted, and the sealing block is configured. It will be appreciated that in other variations, three or more sets of circuit boards and cover plates may be provided on each heat sink.

It will be appreciated that in other embodiments, the raised ring 2394 on the back of the nut 2391 of the screw 239 may be replaced by a plurality of raised portions distributed along a circle centered on the polished rod.

It is understood that in other embodiments, the heat sink may be other shapes of heat sink, so long as it has a flat fixing surface to which the cover plate can be fixed. For example, but not limited to, the heat sink may include a heat transfer plate having a first surface serving as a fixing surface and a second surface having a plurality of heat dissipation fins formed thereon.

It is understood that in other embodiments, two first slides of the fixing member may be fixedly connected to the heat sink. That is, the sliding groove on the heat sink is eliminated, so that one claw part in the first sliding piece is fixedly connected with the long edge of the heat sink or integrally formed with the long edge of the heat sink, the two first sliding pieces are changed into two sliding grooves which are oppositely arranged, and the cover plate needs to be inserted into the two first sliding pieces from one end of the sliding grooves to realize fixation. The cover plate can be pressed on the radiator in a manner of uniformly stressing the periphery of the cover plate.

It is understood that in other embodiments, only one power connection terminal may be disposed on the circuit board for electrical connection with the power cord within the fixture. In this case, only one circuit board and one cover plate are provided on each heat sink.

It will be appreciated that the bolt fastening above preferably uses spacers or shims, and that the faces of the spacers or shims in contact with the mounting surface preferably conform to the mounting surface, thereby increasing the strength of the connection.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. The utility model provides an illumination lamp, includes lighting fixture and assembles at least one light source module in the lighting fixture inboard, and every light source module includes:

a heat sink;

one side of the circuit board clings to the radiator, and the other side of the circuit board is provided with a plurality of light sources; and

a cover plate on which a plurality of optical lenses are formed;

it is characterized by also comprising:

and the fixing piece is connected with the radiator and presses the cover plate on the radiator in a manner that the periphery of the cover plate is uniformly stressed.

2. The lighting fixture of claim 1, wherein the heat sink further has screw holes formed therein, and the cover plate and the circuit board have through holes formed therein corresponding to the screw holes, wherein the cover plate has an outer surface further having a plurality of protrusions formed on the outer periphery of the through holes; when the screw passes through the cover plate and the through hole on the circuit board and is screwed into the screw hole on the radiator, a gap exists between the nut of the screw and the plurality of bulges or the screw is only contacted with the plurality of bulges.

3. The lighting fixture of claim 2, wherein the plurality of protrusions are spaced a predetermined distance from an edge bounding the through-hole.

4. The light fixture of claim 2 wherein the screw comprises the nut, a peripheral unthreaded polish rod extending from a center of a back of the nut, and a peripheral threaded rod extending from an end of the polish rod; the screw rod corresponds to a screw hole on the radiator, and the outer diameter of the polish rod is larger than that of the screw rod; the distance between the screw rod and the position of the screw cap, which is contacted with the bulge, is equal to or greater than the distance between the surface of the heat radiator, which is contacted with the circuit board, and the surface of the bulge.

5. The light fixture of claim 4, wherein the back of the nut is formed with a raised ring or a plurality of raised portions distributed along a circle centered on a polished rod, the polished rod extending from a middle portion of the groove and the raised ring or plurality of raised portions contacting the plurality of protrusions on the cover plate.

6. A lighting fixture as recited in any one of claims 1-5, wherein the heat sink comprises: the heat exchanger comprises a first heat transfer plate attached to the lower surface of the circuit board, two second heat transfer plates extending from two sides of the lower surface of the first heat transfer plate, and a third heat transfer plate connecting the tail ends of the two second heat transfer plates; the first heat transfer plate is roughly in a rectangular plate shape, and two side walls serving as long sides of the first heat transfer plate are provided with sliding grooves which penetrate through the head and the tail; grooves or steps which are sunken upwards and downwards are formed on the long edges of the cover plate; the fixed piece comprises two oppositely arranged first sliders and two oppositely arranged second sliders; the first slider comprises a strip-shaped base plate and two sliding rails extending from two long edges of the base plate, one sliding rail is inserted into a sliding groove on the first heat transfer plate, the other sliding rail is pressed on a groove or a step of the cover plate from top to bottom, and the cover plate is pressed on the radiator in a manner that the two long edges of the cover plate are uniformly stressed; the second slider comprises a long pressing plate and two claw parts extending downwards from two ends of the pressing plate, the two claw parts of the second slider are respectively inserted into the two sliding grooves of the first heat transfer plate, and the short edge of the cover plate is pressed on the radiator in a uniform stress mode by the pressing plate.

7. The light fixture of claim 6, wherein the second slide further comprises a baffle extending from the pressure plate toward the heat sink.

8. The lighting fixture of claim 6, wherein each light source module comprises one heat sink, at least two circuit boards, and at least two cover plates; each cover plate seals a circuit board between the cover plate and the radiator through a sealing rubber ring and a group of fixing pieces; each circuit board is provided with two power supply wiring terminals, a wire hole is formed in the position, close to each power supply wiring terminal, of the radiator, one end of a connecting wire for electrically connecting adjacent circuit boards is connected with one power supply wiring terminal of one circuit board, then extends to the back of the radiator from the wire hole nearby, and extends to and is connected with one power supply wiring terminal of the other circuit board from the other wire hole; the back of the radiator is fixed with a sealing block used for sealing the connecting wire and the corresponding wire hole, an annular groove used for containing a sealing rubber ring is formed in the sealing block, and the sealing block is fixed on the back of the radiator through the sealing rubber ring and a screw to seal the connecting wire and the corresponding wire hole.

9. A lighting fixture as recited in any one of claims 1-5, wherein each light source module comprises one said heat sink, at least two said circuit boards, and at least two said cover plates; each cover plate seals a circuit board between the cover plate and the radiator through a sealing rubber ring and a group of fixing pieces; each circuit board is provided with two power supply wiring terminals, a wire hole is formed in the position, close to each power supply wiring terminal, of the radiator, one end of a connecting wire for electrically connecting adjacent circuit boards is connected with one power supply wiring terminal of one circuit board, then extends to the back of the radiator from the wire hole nearby, and extends to and is connected with one power supply wiring terminal of the other circuit board from the other wire hole; the back of the radiator is fixed with a sealing block used for sealing the connecting wire and the corresponding wire hole, an annular groove used for containing a sealing rubber ring is formed in the sealing block, and the sealing block is fixed on the back of the radiator through the sealing rubber ring and a screw to seal the connecting wire and the corresponding wire hole.

10. A lighting fixture as recited in any one of claims 1-5, wherein a power connection terminal is disposed on the circuit board, a wire hole is formed in the heat sink adjacent to the power connection terminal, a power wire passes through the wire hole via a sealing rubber seat, and a first electrical connector is connected to a distal end of the power wire; a rubber seat for guiding is further fixed on the power line between the first electric connector and the sealing rubber seat; the rubber seat for guiding is columnar, and a convex edge is formed at one end of the rubber seat for guiding, which is close to the sealing rubber seat; the lamp holder is provided with a wire hole corresponding to the wire hole on the radiator, and the size of the wire hole on the lamp holder is smaller than that of the convex edge.

11. A lighting fixture as recited in claim 10, wherein a second electrical connector is connected to an end of a power cord within said fixture, a block is secured adjacent said second electrical connector, and a plurality of fingers are formed on a peripheral wall of said block and extend outwardly and away from said second electrical connector; the peripheral size of the rubber block is smaller than or equal to the size of the line hole, and the outward extending size of the finger part is larger than the size of the line hole; under the action of external force, the rubber block and the finger parts can pass through the wire holes.

12. The light fixture of claim 6, wherein at least one of the second heat transfer plates is formed with a groove adjacent to the third heat transfer plate.