CN219867806U

CN219867806U - Outdoor lamp

Info

Publication number: CN219867806U
Application number: CN202223587621.3U
Authority: CN
Inventors: 李相兰
Original assignee: Opple Lighting Co Ltd; Suzhou Op Lighting Co Ltd
Current assignee: Opple Lighting Co Ltd; Suzhou Op Lighting Co Ltd
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-10-20
Anticipated expiration: 2032-12-31

Abstract

An outdoor light fixture, comprising: the heat dissipation device comprises a first substrate and a bone position, wherein the first substrate is provided with an installation side, and the bone position is arranged on the installation side; the lens module comprises a second substrate and a fixing part, wherein the fixing part is formed on the periphery of the second substrate, the fixing part is provided with a fixing groove surrounding the second substrate, and an opening of the fixing groove faces the mounting side; the lens module is assembled and fixed with the heat dissipation device, and the lens module faces the installation side, wherein the bone position stretches into the fixing groove and is spaced from the groove wall of the fixing groove to form a glue storage groove, and the glue storage groove is filled with sealant. The outdoor lamp can reduce the risk of water leakage and improve the waterproof performance.

Description

Outdoor lamp

Technical Field

The utility model relates to the technical field of illumination, in particular to an outdoor lamp.

Background

The LED light source is gradually popularized to outdoor lamps, particularly to public lighting settings such as street lamps which need to work for a long time due to the advantages of long service life, environmental protection, cleanness, small power consumption, controllable light emitting color and the like, and is convenient for heat dissipation of the LED light source, and the LED light source and the LED heat dissipation device are matched for use so as to facilitate heat dissipation.

In the outdoor lamp in the current market, an LED heat dissipation device and a lens module are generally fixed, and an LED light source plate is arranged in a mounting cavity formed by the LED heat dissipation device and the lens module. In order to carry out waterproof design to the installation cavity, adopt waterproof rubber circle in the junction of LED heat abstractor and lens module generally, make waterproof rubber circle by LED heat abstractor and lens module extrusion simultaneously to reach waterproof purpose.

However, the rubber ring is extruded in a manner that the position is uneven or the stress part is invalid, so that local water leakage is caused, the lamp is damaged, and safety accidents such as electric leakage and electric shock are easy to occur.

Disclosure of Invention

The utility model solves the technical problem of providing an outdoor lamp so as to reduce the risk of water leakage and improve the waterproof performance.

In order to solve the technical problems, the technical scheme of the utility model provides an outdoor lamp, which comprises: the heat dissipation device comprises a first substrate and a bone position, wherein the first substrate is provided with an installation side, and the bone position is arranged on the installation side; the lens module comprises a second substrate and a fixing part, wherein the fixing part is formed on the periphery of the second substrate, the fixing part is provided with a fixing groove surrounding the second substrate, and an opening of the fixing groove faces the mounting side; the lens module is assembled and fixed with the heat dissipation device, and the lens module faces the installation side, wherein the bone position stretches into the fixing groove and is spaced from the groove wall of the fixing groove to form a glue storage groove, and the glue storage groove is filled with sealant.

Optionally, the bone position stretches out from the surface of the first base plate at the installation side, the notch butt of fixed slot first base plate is at the surface of the installation side, and, the thickness of bone position is less than the groove width of fixed slot, the height of bone position is less than the groove depth of fixed slot.

Optionally, the bone site includes annular bone site perisporium, be formed with on the perisporium of bone site around the second base plate interval sets up a plurality of bone site reinforcements, the lateral wall of bone site reinforcement is relative the perisporium of bone site towards heat abstractor's central region is sunken, and the inside wall of bone site reinforcement is relative the perisporium of bone site towards heat abstractor's central region protrusion.

Optionally, the number of the bone site reinforcing parts is multiple, and the multiple bone site reinforcing parts are uniformly distributed around the second substrate, so as to form a zigzag bone site structure together with the bone site peripheral wall.

Optionally, a fixing flange extending away from the mounting side is formed on the periphery of the first substrate; the fixing part further includes: the fixing parts are arranged at intervals, the fixing parts encircle the fixing grooves, each fixing part comprises a clamping hook, and the clamping hooks are clamped with the fixing flanging.

Optionally, a mounting cavity recessed away from the mounting side is formed on one surface of the second substrate facing the mounting side; the outdoor lamp further comprises a light source module, the light source module comprises a PCB (printed circuit board) arranged in the mounting cavity, the PCB is provided with a front surface and a back surface which are oppositely arranged, the front surface of the PCB is attached and fixed with the surface of the first substrate on the mounting side, and a plurality of LED light sources are arranged on the back surface of the PCB; the lens module further comprises a plurality of lenses protruding back to the mounting cavity, and the lenses are matched with the LED light sources.

Optionally, the second substrate is further provided with a plurality of elastic members extending towards the heat dissipation device, and the elastic members elastically abut against the front surface of the PCB.

Optionally, the first substrate still has with the installation side sets up the radiating side in opposite directions, heat abstractor is still including locating the radiating fin subassembly of radiating side, the radiating fin subassembly includes the radiating fin that a plurality of intervals set up, radiating fin is for having the bending structure of a plurality of bends, just be equipped with the water conservancy diversion breach on the radiating fin, the water conservancy diversion breach is used for the water conservancy diversion of ponding, the water conservancy diversion breach exposes the first substrate is in the surface of radiating side.

Optionally, the second substrate is further provided with a plurality of positioning columns extending towards the heat dissipation device, the PCB board is provided with a plurality of abdicating holes corresponding to the positioning columns, the first substrate is further provided with a plurality of positioning grooves, and the positioning columns penetrate through the abdicating holes and are contained in the positioning grooves.

Optionally, the method further comprises: the power supply hole is arranged on the first substrate, the hole wall of the power supply hole extends away from the mounting side, an annular hole wall limiting part is formed on the inner side wall of the power supply hole, and a limiting step is formed on one side of the hole wall limiting part away from the mounting cavity; a flashing comprising: the waterproof connector is arranged in the power hole in a penetrating mode, the waterproof connector cap, the waterproof connector nut and the elastic waterproof ring are connected with the waterproof connector in a threaded mode, the waterproof connector is provided with connector limiting parts, the connector limiting parts and the waterproof connector nut are respectively located at two sides of the hole wall limiting part, the connector limiting parts can be limited by the table top of the limiting step in an abutting mode, the waterproof connector nut is contained in the power hole and abuts against the hole wall limiting part, the elastic waterproof ring is elastically abutted between the hole wall limiting part and the connector limiting parts, the limiting steps encircle the elastic waterproof ring, and the outer side walls of the elastic waterproof ring are elastically abutted with the step side wall surfaces of the limiting steps; and the cable passes through the waterproof piece and is electrically connected with the circuit of the PCB.

Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

in the outdoor lamp provided by the technical scheme of the utility model, the bone position extends into the fixing groove and is separated from the groove wall of the fixing groove to form the glue storage groove, so that the glue storage groove is of a structure similar to a V-shaped groove. Correspondingly, the sealing glue is filled in the glue storage groove, so that a V-shaped waterproof blocking section line can be formed, the length of the waterproof blocking section line is increased, and the outdoor lamp can have good waterproof performance. Meanwhile, the waterproof adhesive has good adhesive force after being cured, so that the radiating device and the lens module can be effectively connected together to realize assembly and fixation between the radiating device and the lens module. Furthermore, because glue is sprayed in the glue storage groove, automation of a glue spraying process can be realized, and glue is not easy to overflow from the outer surface of the outdoor lamp.

Drawings

Fig. 1 is an exploded view of an outdoor light fixture according to an embodiment of the present utility model;

fig. 2 is a schematic perspective view of an outdoor lamp according to an embodiment of the present utility model at a first viewing angle;

fig. 3 is a schematic perspective view of an outdoor lamp according to an embodiment of the present utility model at a second viewing angle;

FIG. 4 is a schematic perspective view of a heat dissipating device according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of a lens module according to an embodiment of the utility model;

FIG. 6 is a cross-sectional view taken along the direction A1-A2 in FIG. 2;

fig. 7 is a sectional view taken along the direction B1-B2 in fig. 2.

Reference numerals illustrate:

100-a heat dissipation device; 110-a first substrate; 111-heat radiation side; 112-mounting side; 113-fixing the flanging; 114-positioning grooves; 120-bone position; 121-bone site perimeter wall; 122-bone site reinforcement; 130-heat sink fins; 131-a diversion gap;

200-lens module; 210-a second substrate; 211-mounting cavity; 212-an elastic member; 213-positioning columns; 220-a fixed slot; 221-a glue storage groove; 230-snap; 231-hook; 240-lens;

300-sealing glue;

400-waterproof piece; 410-waterproof joint; 411-joint limiter; 420-waterproof joint cap; 430-a waterproof joint nut; 440-elastic waterproof ring;

500-cables;

600-power hole; 610—the walls of the power supply holes; 620-hole wall limiting part; 621-limiting steps;

700-light source module.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

It is to be understood that the described embodiments are merely some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

The embodiment of the utility model provides an outdoor lamp.

Fig. 1 is an exploded view of an outdoor lamp according to an embodiment of the present utility model, fig. 2 is a schematic perspective view of the outdoor lamp according to the embodiment of the present utility model at a first viewing angle, fig. 3 is a schematic perspective view of the outdoor lamp according to the embodiment of the present utility model at a second viewing angle, fig. 4 is a schematic perspective view of a heat dissipating device according to the embodiment of the present utility model, fig. 5 is a schematic perspective view of a lens module according to the embodiment of the present utility model, fig. 6 is a cross-sectional view along a direction A1-A2 in fig. 2, and fig. 7 is a cross-sectional view along a direction B1-B2 in fig. 2.

Referring to fig. 1 to 7, the outdoor lamp includes: a heat sink 100 and a lens module 200.

The heat dissipating device 100 includes: the bone site 120 includes a first substrate 110, a bone site 120, and a sealant 300.

The first substrate 110 has a mounting side 112, and the bone site 120 is disposed on the mounting side 112.

The lens module 200 includes: a second substrate 210 and a fixing portion.

The fixing portion is formed on the periphery of the second substrate 210, and the fixing portion is provided with a fixing groove 220 surrounding the second substrate 210, and an opening of the fixing groove 220 faces the mounting side 112.

The lens module 200 is assembled and fixed with the heat dissipating device 100, and the lens module 200 faces the mounting side 112, wherein the bone portion 120 extends into the fixing groove 220 and is spaced apart from the groove wall of the fixing groove 220 to form a glue storage groove 221 (as shown in fig. 6), and the glue storage groove 221 is filled with sealant 300 (as shown in fig. 7).

It should be noted that, for ease of understanding and explanation, the sealant 300 is not shown in fig. 6.

Since the bone site 120 is protruded into the fixing groove 220 and spaced apart from the groove wall of the fixing groove 220 to form the glue storage groove 221, the glue storage groove 221 is constructed like a V-shaped groove. Accordingly, by filling the sealant in the sealant groove 221, a waterproof barrier section line like a V-shape can be formed, thereby increasing the length of the waterproof barrier section line, and thus, the outdoor lamp can have good waterproof performance.

Meanwhile, the waterproof adhesive has good adhesion after being cured, so that the heat dissipation device 100 and the lens module 200 can be effectively connected together to realize assembly and fixation between the two.

Furthermore, since the glue is applied to the glue storage groove 221, not only can the automation of the glue application process be realized, but also the appearance of the outdoor lamp is not easy to overflow.

In addition, since the glue is applied in the glue storage groove 221, the amount of the glue that can be injected is large, and the process difficulty is low.

In some embodiments, the bone site 120 protrudes from the surface of the first substrate 110 on the mounting side 112, the notch of the fixing groove 220 abuts against the surface of the first substrate 110 on the mounting side 112, and the thickness of the bone site 120 is smaller than the groove width of the fixing groove 220, and the height of the bone site 120 is smaller than the groove depth of the fixing groove 220. Thus, the formation of the glue storage groove 221 like a V-groove structure can be achieved, and the sealability of the junction of the heat sink 100 and the lens module 200 is increased.

In some embodiments, the bone site 120 includes an annular bone site circumferential wall 121, a plurality of bone site reinforcing parts 122 are formed on the bone site circumferential wall 121 at intervals around the second substrate 210, outer side walls of the bone site reinforcing parts 122 are recessed toward a central region of the heat dissipating device 100 with respect to the bone site circumferential wall 121, and inner side walls of the bone site reinforcing parts 122 are protruded toward the central region of the heat dissipating device 100 with respect to the bone site circumferential wall 121.

Because the bone site 120 includes the annular bone site peripheral wall 121, and the bone site peripheral wall 121 is formed with the plurality of bone site reinforcing parts 122 that are disposed around the second substrate 210 at intervals, the structural strength of the bone site 120 is high, which is beneficial to improving the overall structural strength of the outdoor lamp and the structural strength of the junction of the heat dissipating device 100 and the lens module 200.

Preferably, the number of the bone reinforcing portions 122 is plural, and the plurality of bone reinforcing portions 122 are uniformly disposed around the second substrate 210 to form a meandering bone structure together with the bone peripheral wall 121. Thereby further improving the structural strength of the bone site 120.

In addition, the problem of waterproof circle of cutting is difficult for producing to tortuous bone position structure under outdoor lamps and lanterns emergence expend with heat and contract with cold's condition.

In some embodiments, the perimeter of the first base plate 110 is formed with a securing cuff 113 that extends away from the mounting side 112.

Correspondingly, the fixing part further includes: a plurality of fixing members 230 disposed at intervals, the plurality of fixing members 230 being disposed around the fixing groove 220.

Specifically, the fixing member 230 includes a hook 231, and the hook 231 is clamped with the fixing flange 113. Thereby, the connection reliability of the heat sink 100 and the lens module 200 is further improved.

In some embodiments, a surface of the second substrate 210 facing the mounting side 112 is formed with a mounting cavity 211 recessed away from the mounting side 112.

And, outdoor lamp also includes: a light source module 700.

Wherein, the light source module 700 includes: a PCB board disposed in the mounting cavity 211.

The PCB board has a front surface and a back surface which are arranged in opposite directions, the front surface of the PCB board is attached and fixed with the surface of the first substrate 110 at the mounting side 112, and a plurality of LED light sources are distributed on the back surface of the PCB board.

Correspondingly, the lens module 200 further includes: a plurality of lenses 240 protruding away from the mounting cavity 211, the plurality of lenses 240 fitting a plurality of LED light sources.

In some embodiments, the outdoor light fixture further comprises: the waterproof member 400 and the cable 500 pass through the waterproof member 400 and electrically connect the circuit of the PCB board with the power hole 600.

The power hole 600 is disposed on the first substrate 110, the hole wall 610 of the power hole extends away from the mounting side 112, an annular hole wall limiting portion 620 is formed on the inner side wall of the power hole 600, and a limiting step 621 is formed on a side of the hole wall limiting portion 620 away from the mounting cavity 211.

The waterproof member 400 includes: the waterproof connector 410 penetrating the power hole 600, the waterproof connector cap 420 and the waterproof connector nut 430 which are in threaded connection with the waterproof connector 410, and the elastic waterproof ring 440 which is sleeved on the waterproof connector 410.

The waterproof connector 410 is provided with a connector limiting piece 411, the connector limiting piece 411 and a waterproof connector nut 430 are respectively located at two sides of the hole wall limiting portion 620, the connector limiting piece 411 can be limited by the table top of the limiting step 621 in an abutting mode, the waterproof connector nut 430 is contained in the power hole 600 and abuts against the hole wall limiting portion 620, the elastic waterproof ring 440 is elastically abutted between the hole wall limiting portion 620 and the connector limiting piece 411, the limiting step 621 surrounds the elastic waterproof ring 440, and the outer side wall of the elastic waterproof ring 440 is elastically abutted against the step side wall surface of the limiting step 621.

Because the elastic waterproof ring 440 is elastically abutted between the hole wall limiting part 620 and the joint limiting part 411, the limiting step 621 surrounds the elastic waterproof ring 440, and the outer side wall of the elastic waterproof ring 440 is elastically abutted with the step side wall surface of the limiting step 621. The waterproof member 400 is thus connected to the heat sink 100 in a waterproof and airtight manner.

On the basis, on the one hand, since the elastic waterproof ring 440 is elastically abutted against the hole wall limiting part 620 and the joint limiting piece 411, and the joint limiting piece 411 can be limited by the abutment of the table surface of the limiting step 621, the elastic waterproof ring 440 is not damaged due to the transitional fastening of the connecting waterproof joint nut 430 when the waterproof joint nut 430 and the waterproof joint 410 are connected. On the other hand, since the waterproof connector 410 is screwed with the waterproof connector nut 430, the waterproof connector nut 430 is received in the power hole 600 and abuts against the hole wall limiting portion 620, the first substrate 110 is less likely to be damaged than in the prior art in which the waterproof connector is directly screwed with the first substrate, and thus, the risk of water seepage is reduced. Thereby, the waterproof performance is further improved.

In some embodiments, the second substrate 210 is further provided with a plurality of elastic members 212 protruding toward the heat dissipating device 100, and the elastic members 212 elastically abut against the front surface of the PCB. Therefore, on one hand, the PCB board and the first substrate 110 can be propped against each other to enable the PCB board and the first substrate to be in full thermal contact with each other; on the other hand, the elastic deformation of the elastic member 212 can compensate the maximum limit value of the locking between the heat dissipating device 100 and the lens module 200 before the sealant (300) is not cured, so that the locking between the heat dissipating device 100 and the lens module 200 is very tight after the sealant (300) is cured. In some embodiments, the second substrate 210 is further provided with a plurality of positioning posts 213 protruding toward the heat dissipation device 100. Correspondingly, a plurality of abdication holes corresponding to the plurality of positioning columns 213 are arranged on the PCB, and a plurality of positioning grooves 114 are arranged on the first substrate 110. The positioning column 213 passes through the relief hole and is accommodated in the positioning groove 114. So as to realize the mutual positioning among the light source module 700, the lens module 200 and the heat sink 100.

In some embodiments, the first substrate 110 also has a heat-dissipating side 111, and the heat-dissipating side 111 and the mounting side 112 are disposed opposite. Accordingly, the heat dissipating device 100 further includes: and the radiating fin assembly is arranged on the radiating side 111 to radiate heat.

Specifically, the heat dissipation fin assembly includes a plurality of heat dissipation fins 130 disposed at intervals, and the heat dissipation fins 130 have a bending structure with a plurality of bends. Therefore, the heat dissipating device 100 not only has high heat dissipating performance, but also has high overall structural strength, the surface of the first substrate 100 is not easy to twist and deform, and the design of the high structural strength enables the first substrate 100 and the heat dissipating fins 130 to have smaller thickness, thereby being beneficial to the weight reduction of the outdoor lamp.

Preferably, the heat sink 100 is formed using a semi-solid die casting process.

Further, the heat dissipation fins 130 are provided with a flow guiding gap 131, the flow guiding gap 131 is used for guiding the accumulated water, and the flow guiding gap 131 exposes the surface of the first substrate 110 on the heat dissipation side 111. Since the heat sink fins 130 have high structural strength, the formation of the flow guiding gaps 131 on the heat sink fins 130 has less influence on the structural strength thereof. On this basis, the water accumulation problem of the heat radiation side 111 can be improved through the flow guiding notch 131.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Claims

1. An outdoor light fixture, comprising:

the heat dissipation device (100) comprises a first substrate (110) and a bone position (120), wherein the first substrate (110) is provided with a mounting side (112), and the bone position (120) is arranged on the mounting side (112);

a lens module (200) comprising a second substrate (210) and a fixing portion, wherein the fixing portion is formed on the periphery of the second substrate (210), and is provided with a fixing groove (220) surrounding the second substrate (210), and an opening of the fixing groove (220) faces the mounting side (112);

the lens module (200) is assembled and fixed with the heat dissipating device (100), and the lens module (200) faces the mounting side (112), wherein the bone position (120) stretches into the fixing groove (220) and is spaced from the groove wall of the fixing groove (220) to form a glue storage groove (221), and the glue storage groove (221) is filled with sealant (300).

2. The outdoor light fixture according to claim 1, wherein the bone site (120) protrudes from the surface of the first substrate (110) at the mounting side (112), the notch of the fixing groove (220) abuts against the surface of the first substrate (110) at the mounting side (112), and the thickness of the bone site (120) is smaller than the groove width of the fixing groove (220), and the height of the bone site (120) is smaller than the groove depth of the fixing groove (220).

3. The outdoor lamp of claim 2, wherein the bone site (120) comprises an annular bone site circumferential wall (121), a plurality of bone site reinforcing parts (122) are formed on the bone site circumferential wall (121) at intervals around the second substrate (210), the outer side walls of the bone site reinforcing parts (122) are recessed toward the central area of the heat dissipating device (100) relative to the bone site circumferential wall (121), and the inner side walls of the bone site reinforcing parts (122) are protruded toward the central area of the heat dissipating device (100) relative to the bone site circumferential wall.

4. An outdoor lamp according to claim 3, wherein the number of said rib-site reinforcing parts (122) is plural, and the plural rib-site reinforcing parts (122) are uniformly arranged around said second substrate (210) to form a meandering rib-site structure together with said rib-site peripheral wall (121).

5. -outdoor light fixture according to any of claims 1 to 4, characterized in that the peripheral edge of the first base plate (110) is formed with a fixing flange (113) projecting away from the mounting side (112);

the fixing part further includes: the fixing device comprises a plurality of fixing pieces (230) which are arranged at intervals, wherein the fixing pieces (230) encircle the fixing groove (220), each fixing piece (230) comprises a clamping hook (231), and each clamping hook (231) is clamped with the corresponding fixing flanging (113).

6. An outdoor light fixture according to claim 5, characterized in that a surface of the second substrate (210) facing the mounting side (112) is formed with a mounting cavity (211) recessed away from the mounting side (112);

the outdoor lamp further comprises a light source module (700), the light source module (700) comprises a PCB (printed circuit board) arranged in the mounting cavity (211), the PCB is provided with a front surface and a back surface which are arranged in a back-to-back mode, the front surface of the PCB and the first substrate (110) are attached and fixed on the surface of the mounting side (112), and a plurality of LED light sources are arranged on the back surface of the PCB;

the lens module (200) further comprises a plurality of lenses (240) protruding away from the mounting cavity (211), and the plurality of lenses (240) are adapted to the plurality of LED light sources.

7. The outdoor lamp of claim 6, wherein the second substrate (210) is further provided with a plurality of elastic members (212) extending toward the heat dissipating device (100), and the elastic members (212) elastically abut against the front surface of the PCB board.

8. The outdoor lamp of claim 6, wherein the first substrate (110) further has a heat dissipation side (111) opposite to the mounting side (112), the heat dissipation device (100) further comprises a heat dissipation fin assembly disposed on the heat dissipation side (111), the heat dissipation fin assembly comprises a plurality of heat dissipation fins (130) disposed at intervals, the heat dissipation fins (130) are of a bending structure with a plurality of bends, and the heat dissipation fins (130) are provided with flow guide notches (131), the flow guide notches (131) are used for guiding water, and the flow guide notches (131) expose the surface of the first substrate (110) on the heat dissipation side (111).

9. The outdoor lamp according to claim 6, wherein the second substrate (210) is further provided with a plurality of positioning columns (213) extending toward the heat dissipating device (100), the PCB board is provided with a plurality of abdication holes corresponding to the plurality of positioning columns (213), the first substrate (110) is further provided with a plurality of positioning grooves (114), and the positioning columns (213) pass through the abdication holes and are accommodated in the positioning grooves (114).

10. The outdoor light fixture of claim 6 further comprising: the power supply hole (600) is arranged on the first substrate (110), a hole wall (610) of the power supply hole (600) extends away from the mounting side (112), an annular hole wall limiting part (620) is formed on the inner side wall of the power supply hole (600), and a limiting step (621) is formed on one side of the hole wall limiting part (620) away from the mounting cavity (211);

a flashing (400) comprising: the waterproof connector comprises a waterproof connector (410) penetrating through a power hole (600), a waterproof connector cap (420) and a waterproof connector nut (430) which are in threaded connection with the waterproof connector (410), and an elastic waterproof ring (440) sleeved on the waterproof connector (410), wherein a connector limiting piece (411) is arranged on the waterproof connector (410), the connector limiting piece (411) and the waterproof connector nut (430) are respectively positioned at two sides of a hole wall limiting part (620), the connector limiting piece (411) can be limited by the table top of a limiting step (621), the waterproof connector nut (430) is accommodated in the power hole (600) and is in contact with the hole wall limiting part (620), the elastic waterproof ring (440) is elastically in contact between the hole wall limiting part (620) and the connector limiting piece (411), the limiting step (621) surrounds the elastic waterproof ring (440), and the outer side wall of the elastic waterproof ring (440) is elastically in contact with the side wall surface of the limiting step (621);

and the cable (500) passes through the waterproof piece (400) and is electrically connected with the circuit of the PCB.