CN209893145U

CN209893145U - LED heat dissipation bulb

Info

Publication number: CN209893145U
Application number: CN201921005589.9U
Authority: CN
Inventors: 宋先勇; 林利民; 陈文坡
Original assignee: Hongyi Lighting Co Ltd
Current assignee: Hongyi Lighting Co Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-01-03
Anticipated expiration: 2029-07-01

Abstract

The utility model relates to a LED heat dissipation bulb, the bulb includes lamp shade, plastic casing and lamp holder, the lamp shade still includes the drive control panel, light source board and the heat dissipation piece that locate in the cavity that the lamp shade encloses with plastic casing and closes and form, the plastic casing includes the first body of ring disk shape, the second body that is connected and cylindric with the inner periphery of first body, the cone that is connected and upper end and lamp holder butt joint with the second body, the heat dissipation piece is attached with first body and second body seamless; the plastic shell is also provided with a heat dissipation structure; this LED heat dissipation bulb, structural design is novel, and plastic housing's structural design is simple ingenious, and plastic housing mainly includes thinner first body and second body and cone, on the basis of the proportional design of first body and second body external diameter, still is provided with heat radiation structure on the plastic housing, and heat radiation structure can give off the inside heat of lamp body, improves this LED heat dissipation bulb's whole heat-sinking capability, increases bulb life.

Description

LED heat dissipation bulb

Technical Field

The utility model relates to a LED heat dissipation bulb.

Background

When the LED lamp works, a series of adverse effects are generated on the use of the LED lamp when the heat dissipation is poor. For example, LED light sources convert electrical energy into light sources, but not all electrical energy can be converted into light sources, which obeys the law of conservation. If the surplus electric energy is used, the surplus electric energy can be converted into heat energy, the heat dissipation is important for the LED lamp, and if the heat dissipation is poor, a series of adverse effects can be caused to the use of the LED lamp. If the LED light source is overheated and the heat cannot be removed, the materials are repeatedly oxidized at high temperature, thereby degrading the quality of the LED light source. In addition, if the heat dissipation structure of the LED lamp is not designed reasonably, the heat dissipation structure cannot quickly remove the redundant heat, the temperature of the LED lamp light source gradually rises, the resistance is increased, the current is increased, the heat generated is increased, and thus the LED light source is overheated to cause damage to electronic components, which leads to failure and shortens the service life of the LED street lamp. The heat dissipation capability of LED lamps is therefore of great importance.

In addition, many materials composed of the LED light bulb, such as aluminum and plastic, have different shrinkage rates due to different materials when the LED light bulb is heated and cooled, and slight deformation may cause extrusion stress between components and deformation damage.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide a LED heat dissipation bulb.

In order to solve the technical problem, the utility model discloses the technical scheme who takes as follows:

an LED heat dissipation bulb comprises a lampshade, a plastic shell and a lamp holder, wherein the lampshade further comprises a drive control panel, a light source plate and a heat dissipation piece, the drive control panel, the light source plate and the heat dissipation piece are arranged in a cavity formed by enclosing the lampshade and the plastic shell, the plastic shell comprises a first body in a ring disc shape, a second body which is connected with the inner periphery of the first body and is cylindrical, and a cone which is connected with the second body and is butted with the lamp holder at the upper end part of the second body, and the heat dissipation piece is seamlessly attached to the first body and the second body; the plastic shell is also provided with a heat dissipation structure.

Preferably, the heat dissipation structure comprises a plurality of heat dissipation fins connected between the upper surface of the first body and the outer peripheral surface of the second body, and the plurality of heat dissipation fins are sequentially distributed at intervals along the circumferential direction.

Preferably, the heat dissipation structure further includes a plurality of heat dissipation protrusions disposed on the upper surface of the first body.

Preferably, the outer diameter value of the second body is 1\2 ~ 3\5 of the outer diameter value of the first body, and the inner diameter of the first body is the same as the inner diameter of the second body.

Preferably, the first body has a thickness value of 1.4mm and the second body has a thickness value of 2.8 mm.

Preferably, the heat sink has a first connection portion and a second connection portion, the first connection portion is in a ring disk shape, a lower side surface of the first connection portion is in butt joint with the light source plate, the second connection portion is in a cylindrical shape, an outer peripheral surface of the second connection portion is attached to an inner peripheral surface of the second body, an upper surface of the first connection portion is attached to a lower surface of the first body, and the drive control board is disposed on an inner peripheral side of the cylindrical second connection portion.

Preferably, the first connecting portion is provided with a plurality of stress relief holes penetrating along the thickness direction of the first connecting portion, and the stress relief holes are sequentially arranged on the annular disc-shaped first connecting portion at intervals along the circumferential direction.

Preferably, the stress relief holes are kidney shaped holes and the lengths of the stress relief holes are the same or different.

Preferably, the stress relief hole has a smaller distance to the outer periphery of the first connection portion than to the inner periphery of the first connection portion.

Preferably, the heat sink is injection molded integrally with the plastic housing.

Due to the implementation of the above technical scheme, compared with the prior art, the utility model have the following advantage:

the utility model discloses a LED heat dissipation bulb, structural design is novel, and plastic housing's structural design is simple ingenious, and plastic housing mainly includes thinner first body and second body and cone, on the proportional design's of first body and second body external diameter basis, still is provided with heat radiation structure on the plastic housing, and heat radiation structure can give off the inside heat of lamp body, improves this LED heat dissipation bulb's whole heat-sinking capability, increases bulb life. The LED radiating bulb is light in overall weight and has advantages in material use cost.

Further, the utility model discloses a heat dissipation piece structural design is simple ingenious, and the radiating effect is fabulous, in addition, through the utility model discloses the overall structure's of LED heat dissipation bulb setting for reduce the process of installation assembly (heat dissipation piece and plastic housing integrated into one piece, need not the installation), thereby reduce the cost of manufacture.

Drawings

FIG. 1 is a schematic view of the main sectional structure of the bulb of the present invention;

FIG. 2 is a schematic perspective view of the bulb of the present invention;

fig. 3 is a schematic perspective view of the heat sink of the present invention;

wherein: 1. a lamp cap; 2. a plastic housing; 21. a first body; 22. a second body; 23. a cone; 24. a heat sink; 25. a heat dissipation protrusion; 3. a lamp shade; 4. a light source plate; 5. a drive control board; 6. a heat sink; 60. a stress release hole; 61. a first connection portion; 62. a second connecting portion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The up-down direction of the utility model is based on the placing state of the bulb when in normal use, namely the direction of the screw thread head is up and the direction of the bulb cover is down;

as shown in fig. 1 to 3, an LED heat dissipation bulb includes a lamp shade 3, a plastic housing 2, and a lamp cap 1, where the lamp shade 3 further includes a driving control board 5, a light source board 4, and a heat dissipation member 6 disposed in a cavity formed by the lamp shade 3 and the plastic housing 2, the plastic housing 2 includes a first body 21 in a ring-disc shape, a second body 22 connected to an inner periphery of the first body 21 and in a cylindrical shape, and a cone 23 connected to the second body 22 and having an upper end portion butted with the lamp cap 1, the first body 21 has a thickness of 1.4mm, and the second body 22 has a thickness of 2.8 mm; the height of the second body 22 is 61 mm. The heat sink 6 is attached to the first body 21 and the second body 22 in a seamless manner; the plastic housing 2 is also provided with a heat dissipating structure.

Further, the plastic housing 2 is further provided with a heat dissipation structure, the heat dissipation structure includes a plurality of heat dissipation fins 24 connected between the upper surface of the first body 21 and the outer peripheral surface of the second body 22, and the plurality of heat dissipation fins 24 are sequentially distributed at intervals along the circumferential direction. The fins 24 are in the form of blades, and the outer contour edges thereof are in arc transition. The heat dissipating structure further includes a plurality of heat dissipating protrusions 25 formed on the upper surface of the first body 21. A group of heat dissipation protrusions 25 is arranged between every two adjacent heat dissipation fins 24, and the heat dissipation protrusions are distributed in a triangular shape.

The outer diameter value (118 mm) of the second body 22 is 1\2 ~ 3\5 of the outer diameter value (66 mm) of the first body 21, and the inner diameter of the first body 21 is the same as that of the second body 22.

The radiating fins 24 on the plastic shell 2 can effectively increase the radiating area and reduce the temperature of the LED lamp beads, and have certain reinforcing effect on the second body 22 while having the radiating capacity; in addition, the current shrink phenomenon that the casing on smooth surface inhomogeneous leads to of wall thickness appears easily when moulding plastics, the utility model discloses set up fin 24 on plastic housing 2, can effectively avoid this shrink phenomenon when moulding plastics, improve pleasing to the eye degree. In addition, the upper surface of the first body 21 is provided with a plurality of heat dissipation protrusions 25, so that the heat dissipation area is further increased, and the heat dissipation capability is improved.

In this example, the heat sink 6 has a first connection portion 61 and a second connection portion 62 (the thickness of the first connection portion 61 and the second connection portion 62 is 1.3 mm), the first connection portion 61 is in a ring-disk shape, the lower surface of the first connection portion 61 is in abutment with the light source plate 4, the second connection portion 62 is in a cylindrical shape, the outer peripheral surface of the second connection portion 62 is in abutment with the plastic case 2, and the drive control board 5 is provided on the inner peripheral side of the cylindrical second connection portion 62. The heat sink 6 and the plastic housing 2 are integrally injection molded, that is, the outer peripheral surface of the second connecting portion 62 is attached to the inner peripheral surface of the second body 22, and the upper surface of the first connecting portion 61 is attached to the lower surface of the first body 21, so that the heat transfer effect is better, and the assembly process is reduced.

Specifically, the first connecting portion 61 is provided with a plurality of stress relief holes penetrating in the thickness direction thereof. The stress relief holes are opened in the annular disc-shaped first connecting portion 61 at intervals in the circumferential direction.

Furthermore, the stress relief holes are waist-shaped holes, and the lengths of the stress relief holes are the same or different; the distance from the stress relief hole to the outer periphery of the first connection portion 61 is smaller than the distance to the inner periphery of the first connection portion 61. The distance from the outer edge of the stress relief hole to the outer edge of the first connection portion 61 was 3.5 mm. The width of the stress relief hole has a value of 3 mm.

Further, the outer diameter of the first connecting portion 61 is 105mm, the outer diameter of the second connecting portion 62 is 58mm, and the height of the second connecting portion 62 is 60 mm. The inner diameter of the first connection portion 61 is the same as that of the second connection portion 62. The outer diameter of the second connecting portion 62 is about 1\2 of the outer diameter of the first connecting portion 61.

Further, aiming at the matching connection mode and the structure setting of the heat sink 6 and the plastic shell 2 of the utility model, under the condition of thermal expansion and cold contraction, the stress can not be released due to different shrinkage rates of the aluminum heat sink 6 and the plastic shell, and the plastic shell 2 is easy to crack, and the stress releasing hole 60 is arranged on the first connecting part 61 of the aluminum heat sink 6, so that the stress can be released to the position of the hole, and the cracking phenomenon of the plastic shell is effectively prevented;

the heat dissipation member 6 is not provided with holes in the initial design, the plastic shell 2 is cracked in the 80 th cycle after 30 minutes of a cold and heat impact experiment at (-40 ℃ to 100 ℃), and the plastic shell 2 is not cracked in the 200 cycles after the aluminum member is provided with the holes in the cold and heat impact experiment.

Stress mainly occurs at the joint of the first connecting portion 61 and the plastic housing 2, and the stress release hole 60 is provided to effectively solve the problem; since the second connecting portion 62 is not easily punched, the stress at the connection of the second connecting portion 62 and the plastic housing 2 is generally overcome by increasing the thickness of the connection to avoid cracking.

To sum up, the utility model discloses a LED heat dissipation bulb, structural design is novel, and plastic housing's structural design is simple ingenious, and plastic housing mainly includes thinner first body and second body and cone, on the basis of the proportional design of first body and second body external diameter, still is provided with heat radiation structure on the plastic housing, and heat radiation structure can give off the inside heat of lamp body, improves this LED heat dissipation bulb's whole heat-sinking capability, increases bulb life. The LED radiating bulb is light in overall weight and has advantages in material use cost.

The present invention has been described in detail, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the protection scope of the present invention should not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a LED heat dissipation bulb, the bulb includes lamp shade, plastic casing and lamp holder, the lamp shade is still including locating drive control board, light source board and the radiating piece in the cavity that lamp shade and plastic casing enclose to close formation, its characterized in that: the plastic shell comprises a first body in the shape of a ring disk, a second body which is connected with the inner periphery of the first body and is cylindrical, and a cone which is connected with the second body and the upper end of which is butted with the lamp cap, wherein the heat dissipation piece is seamlessly attached to the first body and the second body; the plastic shell is also provided with a heat dissipation structure.

2. The LED heat dissipating bulb of claim 1, wherein: the heat dissipation structure comprises a plurality of heat dissipation fins connected between the upper surface of the first body and the peripheral surface of the second body, and the plurality of heat dissipation fins are sequentially distributed at intervals along the circumferential direction.

3. The LED heat dissipating bulb of claim 2, wherein: the heat dissipation structure further comprises a plurality of heat dissipation protrusions arranged on the upper surface of the first body.

4. The LED heat dissipation bulb as recited in claim 1, wherein the outer diameter of said second body is 1\2 ~ 3\5 of the outer diameter of said first body.

5. The LED heat dissipating bulb of claim 1, wherein: the first body has a thickness value of 1.4mm and the second body has a thickness value of 2.8 mm.

6. The LED heat dissipating bulb of claim 1, wherein: the heat dissipation piece is provided with a first connecting portion and a second connecting portion, the first connecting portion are in a ring disc shape, the lower side face of the first connecting portion is in butt joint with the light source plate, the second connecting portion are cylindrical, the outer peripheral face of the second connecting portion is attached to the inner peripheral face of the second body, the upper surface of the first connecting portion is attached to the lower surface of the first body, and the drive control board is arranged on the inner peripheral side of the second connecting portion.

7. The LED heat dissipating bulb of claim 6, wherein: the first connecting portion is provided with a plurality of stress relief holes which penetrate through the first connecting portion along the thickness direction of the first connecting portion, and the stress relief holes are arranged on the first connecting portion in a ring disc shape at intervals along the circumferential direction.

8. The LED heat dissipating bulb of claim 7, wherein: the stress relief holes are waist-shaped holes, and the lengths of the stress relief holes are the same or different.

9. The LED heat dissipating bulb of claim 8, wherein: the distance value from the stress relief hole to the outer periphery of the first connecting part is smaller than the distance value from the stress relief hole to the inner periphery of the first connecting part.

10. The LED heat dissipating bulb of claim 1, wherein: the heat dissipation piece and the plastic shell are integrally formed in an injection molding mode.