CN217928333U - LED bulb - Google Patents

Abstract

The utility model belongs to the technical field of lighting apparatus, especially, relate to a LED bulb. Specifically, the LED light bulb includes: a light-transmitting bulb having an assembly space; the LED light source is arranged in the assembling space and comprises an LED wafer; the cylindrical light guide is arranged in the assembly space, the cylindrical light guide is provided with a base end, the base end is arranged corresponding to the LED wafer, a plurality of strip prisms are arranged on the circumferential side wall of the cylindrical light guide in parallel around the axis of the cylindrical light guide, and the extension direction of each strip prism is basically parallel to the axis direction of the cylindrical light guide. Use the technical scheme of the utility model shape, size and play plain noodles angle etc. between each prism structure of column light guide must all inequality in having solved current LED bulb lead to the manufacturing and designing of column light guide to complicate, are unfavorable for the production efficiency and the manufacturing cost's of LED bulb problem.

Description

LED bulb

Technical Field

The utility model belongs to the technical field of lighting apparatus, especially, relate to a LED bulb.

Background

The existing LED bulb generally adopts an LED light source to emit light and then directly transmit the light out of the bulb shell for illumination, so that the light-emitting intensity of some positions of the bulb shell is stronger, the light-emitting intensity of other positions is weaker, the light-emitting is uneven, the glare condition can occur when people pass by eyes and receive strong light, and the illumination experience is poorer. In order to make the light emitted by the bulb shell more uniform, the LED bulbs on the market adopt a mode of additionally arranging a columnar light guide for light guide, and the light emitted by an LED light source can be uniformly transmitted to each position of the bulb shell after being transmitted by the columnar light guide and then is emitted for illumination. Also, in order to further uniformly conduct the light emitted from the LED light source to each position of the bulb, a plurality of prism structures having an annular shape with an optical function are provided on the columnar light guide, and the plurality of prism structures are arranged in the axial direction of the columnar light guide, such as the columnar light guides disclosed in US2013083555A1 and US2013114266 A1. However, in order to uniformly transmit the light emitted from the LED light source to each position of the bulb, the shape, size, and angle of the light-emitting surface of each prism structure must be different, which complicates the design and manufacture of the cylindrical light guide and is not favorable for the production efficiency and cost of the LED bulb.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LED bulb aims at solving shape, size and play plain noodles angle etc. between each prism structure of column light guide in the current LED bulb and must all inequality, leads to the manufacturing and designing of column light guide to complicate, is unfavorable for the production efficiency and the manufacturing cost's of LED bulb problem.

In order to achieve the purpose, the utility model adopts the technical proposal that: an LED light bulb comprising:

a light-transmitting bulb having an assembly space;

the LED light source is arranged in the assembling space and comprises an LED wafer;

the cylindrical light guide is arranged in the assembly space, the cylindrical light guide is provided with a base end, the base end is arranged corresponding to the LED wafer, a plurality of strip prisms are arranged on the circumferential side wall of the cylindrical light guide in parallel around the axis of the cylindrical light guide, and the extension direction of each strip prism is basically parallel to the axis direction of the cylindrical light guide.

In one embodiment, the LED bulb further comprises a reflective ring, the cylindrical light guide further has a free end opposite to the base end, the reflective ring is provided with a through hole for the free end to pass through, the reflective ring is connected to the LED light source, and a surface of the reflective ring facing away from the base end is a first reflective surface.

In one embodiment, the LED bulb further comprises a conical reflector, the free end is provided with a conical cavity recessed towards the base end, the conical reflector is detachably mounted in the conical cavity, and the surface of the conical reflector facing the base end is a second reflecting surface.

In one embodiment, the second reflective surface is affixed to the walls of the conical re-entrant cavity.

In one embodiment, the free end is provided with at least two first hooks, the conical reflector is provided with at least two buckling lugs, and the first hooks hook the buckling lugs in a one-to-one correspondence manner.

In one embodiment, the base end is provided with a receiving cavity, and the LED chip is located in the receiving cavity.

In one embodiment, the LED light source further includes a carrier plate, the LED chip is disposed on the carrier plate, the carrier plate further has a first positioning hole, the base end further has a positioning post, the positioning post is inserted into the first positioning hole, and the base end is connected to the carrier plate.

In one embodiment, the LED bulb further includes a heat dissipation plate for conducting heat of the carrier plate, and the heat dissipation plate is attached to a side of the carrier plate away from the LED chip.

In one embodiment, the LED bulb further comprises a lamp cap, the lamp cap is connected with the bulb shell to form an assembly space, and a connecting terminal for connecting an external power supply of the LED light source penetrates out of the lamp cap.

In one embodiment, a shell is arranged in the lamp cap, the shell is positioned on one side, away from the columnar light guide, of the heat dissipation plate, the outer wall of the shell is attached to the inner wall of the lamp cap, and the heat dissipation plate is clamped between the shell and the opening end of the bulb shell.

The utility model discloses following beneficial effect has at least:

use the embodiment of the utility model provides a LED bulb throws light on, in LED bulb course of operation, the LED wafer of LED light source is luminous to shine to the basal portion end of column light guide and shine to the cell-shell by the conduction of column light guide, then the light-emitting illumination. In the process of guiding light by the columnar light guide, the plurality of strip prisms are arranged on the circumferential side wall of the columnar light guide, the extension direction of each strip prism is basically parallel to the axis direction of the columnar light guide, and the plurality of strip prisms are arranged in parallel around the axis of the columnar light guide, so that light entering the columnar light guide from the base end is guided to the circumferential side wall and then uniformly transmitted and emitted to the bulb shell in the circumferential direction by each strip prism, and the purpose of uniform light emitting and illumination is achieved. Moreover, each strip prism on the columnar light guide does not need to consider the design factors such as the shape, the size, the angle of the light emergent surface and the like, so that the design and the manufacture of the columnar light guide are simplified, the production efficiency of the LED bulb is greatly improved, and the production cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is an external view of an LED bulb according to an embodiment of the present invention after assembly;

fig. 2 is a first exploded view of an LED bulb according to an embodiment of the present invention;

fig. 3 is a second exploded view of the LED bulb according to the embodiment of the present invention;

fig. 4 is an exploded view of a LED light source, a cylindrical light guide, a conical reflector, and a reflective ring in an LED light bulb according to an embodiment of the present invention;

fig. 5 is a second exploded view of the LED light source, the cylindrical light guide, the conical reflector, and the reflective ring of the LED light bulb according to the embodiment of the present invention;

fig. 6 is a cross-sectional view of the LED bulb of the embodiment of the present invention taken along the axis thereof.

Wherein, in the figures, the various reference numbers:

10. a bulb shell; 11. an assembly space; 101. a lamp cap;

20. an LED light source; 21. a carrier plate; 22. an LED wafer; 211. a first fastening hole; 212. a first positioning hole; 213. avoiding the gap;

30. a cylindrical light guide; 31. a base end; 32. a free end; 33. a strip prism; 311. a receiving cavity; 312. a positioning column; 313. a third hook; 320. a conical cavity; 321. a first clasp;

40. a conical reflector; 41. a second reflective surface; 42. buckling lugs;

50. a reflective ring; 51. a through hole; 52. a first reflective surface; 53. a second clasp;

60. a heat dissipation plate; 61. a second positioning hole; 62. a second fastening hole; 63. a communication gap;

70. a housing.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

As shown in fig. 1 to 6, an embodiment of the present invention provides an LED bulb. Specifically, the LED bulb includes a bulb case 10, an LED light source 20, and a cylindrical light guide 30, the bulb case 10 is transparent, the bulb case 10 has an assembly space 11, the LED light source 20 is installed in the assembly space 11, the LED light source 20 includes an LED chip 22, the cylindrical light guide 30 is installed in the assembly space 11, the cylindrical light guide 30 has a base end 31, a plurality of strip prisms 33 are provided on a circumferential side wall of the cylindrical light guide 30, the plurality of strip prisms 33 are arranged in parallel around an axis of the cylindrical light guide 30, and an extension direction of each strip prism 33 is substantially parallel to an axial direction of the cylindrical light guide 30.

Use the embodiment of the utility model provides an LED bulb throws light on, and in LED bulb course of operation, LED wafer 22 of LED light source 20 is luminous to base end 31 that shines to column light guide 30 is shone to cell-shell 10 by the conduction of column light guide 30, then the light-emitting illumination. In the process of guiding light by the columnar light guide 30, since the plurality of strip-shaped prisms 33 are arranged on the circumferential side wall of the columnar light guide 30, the extension direction of each strip-shaped prism 33 is substantially parallel to the axial direction of the columnar light guide 30, and the plurality of strip-shaped prisms 33 are arranged in parallel around the axial line of the columnar light guide 30, light entering the columnar light guide 30 from the base end 31 is guided to the circumferential side wall, and then uniformly penetrates through the circumferential direction by each strip-shaped prism 33 and exits to the bulb 10, so that the purpose of uniform light emitting and illumination is achieved. Moreover, the strip prisms 33 on the columnar light guide 30 do not need to consider the design factors such as the shape, the size, the angle of the light-emitting surface and the like, so that the design and the manufacture of the columnar light guide 30 are simplified, the production efficiency of the LED bulb is greatly improved, and the production cost is reduced.

As shown in fig. 2-6, the LED bulb further includes a reflective ring 50. The cylindrical light guide 30 further has a free end 32 opposite to the base end 31, the reflective ring 50 is provided with a through hole 51, the reflective ring 50 is mounted, the free end 32 passes through the free end 32, and then the reflective ring 50 is connected to the LED light source 20. The installed reflective ring 50 shields the LED light source 20 so that a user does not directly see the glare emitted from the LED; the surface thereof facing away from the base end 31 is a first reflecting surface 52, and the light is reflected by the first reflecting surface 52 to be reflected to the bulb 10. That is, when the light emitted from the LED chip 22 is transmitted by the columnar light guide 30 and transmitted through the respective strip prisms 33 to irradiate, part of the light is irradiated toward the reflective ring 50, and if the part of the light is not reflected to irradiate from the bulb 10, the part of the light is finally lost, thereby reducing the luminous efficacy, and in order to utilize the part of the light for illumination, the surface of the reflective ring 50 facing away from the base end 31 is prepared as the first reflective surface 52, and the part of the light is reflected to the bulb 10 by the first reflective surface 52 and illuminated.

In the process in which the light emitted from the LED chip 22 is guided by the columnar light guide 30, a part of the light is guided directly from the base end 31 to the free end 32, in addition to being guided to the respective strip prisms 33. If this portion of the light is directly irradiated from the free end 32 to the bulb 10 and emits light, the bulb light emission distribution becomes extremely uneven. And if the light is emitted from the free end 32 in a relatively concentrated manner, the light will cause dazzling light to the eyes, therefore, as shown in fig. 2 to 6, the LED bulb further includes a conical reflector 40, the free end 32 is provided with a conical concave cavity 320 recessed toward the base end 31, the conical reflector 40 is detachably mounted in the conical concave cavity 320, and the surface of the conical reflector 40 facing the base end 31 is the second reflecting surface 41. Thus, the part of the light guided to the free end 32 is reflected by the second reflecting surface 41, a part of the light reflected by the second reflecting surface 41 is directly reflected onto the bulb 10 around the circumference of the cylindrical light guide 30 and goes out of the light illumination, and another part of the light reflected by the second reflecting surface 41 is reflected by the second reflecting surface 41 onto the first reflecting surface 52, and then is reflected again by the first reflecting surface 52 to the bulb 10 and goes out of the light illumination. So for the whole light-emitting of LED bulb is more even and soft, thereby has eliminated the light of following the direct outgoing of free end 32 and has caused the condition of dazzling light to people's eyes, improves the comfortable experience of using of lamps and lanterns and feels.

As shown in fig. 2 to 5, the free end 32 is provided with at least two first hooks 321, the conical reflector 40 is provided with at least two fastening lugs 42, and the first hooks 321 hook the fastening lugs 42 in a one-to-one correspondence manner, so that the conical reflector 40 can be detachably mounted on the free end 32. In the embodiment of the present invention, two first hooks 321 are disposed on the free end 32, and the two first hooks 321 are symmetrically disposed with respect to the axis of the cylindrical light guide 30, and accordingly, the conical reflector 40 is disposed with two fastening lugs 42, and the two fastening lugs 42 are hooked with the two first hooks 321 in a one-to-one manner.

Referring to fig. 6, the second reflecting surface 41 is attached to the wall surface of the tapered cavity 320. This is so that light that is conducted from the base end 31 to the free end 32 does not need to exit the wall surface of the tapered cavity 320, and the light is reflected directly in the cylindrical light guide 30. Also, the conical reflector 40 fits more compactly with the free end 32.

In order to further improve the light efficiency of the LED chip 22, therefore, as shown in fig. 3 and 5, the base end 31 is provided with a receiving cavity 311, and the LED chip 22 is located in the receiving cavity 311. In this way, during the operation of the LED light bulb, the LED chip 22 emits light in the accommodating cavity 311, and the light emitted from the LED chip 22 can almost completely irradiate into the base end 31 and be conducted, that is, the light emitted from the LED chip 22 is blocked by the cavity wall of the accommodating cavity 311 and almost completely enters into the cylindrical light guide 30 from the base end 31 to be conducted, so that the light efficiency of the LED chip 22 is greatly improved.

As shown in fig. 2 to 5, the LED light source 20 further includes a carrier plate 21, and the LED chip 22 is disposed on the carrier plate 21. In some embodiments, the carrier 21 may be a PCB printed with printed circuits, and the LED chip 22 is fixed on the PCB and electrically connected to the printed circuits for conduction; alternatively, in other embodiments, the carrier plate 21 may be a plate frame for carrying, and may be a metal plate frame, or a plate frame made of other materials, and the LED chip 22 is fixed on the plate frame, and then electrically connected to the LED chip 22 through a wire to realize conduction. In order to quickly position and mount the cylindrical light guide 30, the carrier plate 21 is further provided with a first positioning hole 212, the base end 31 is further provided with a positioning post 312, the positioning post 312 is inserted into the first positioning hole 212 to quickly position between the cylindrical light guide 30 and the carrier plate 21, and then the base end 31 is connected to the carrier plate 21 to stabilize the cylindrical light guide 30.

Specifically, the utility model discloses an among the LED bulb, support plate 21 is equipped with a first knot hole 211 and dodges breach 213, and reflection ring 50 is equipped with two at least second clips 53 towards one side of LED light source 20, and a part second clip 53 passes first knot hole 211 and hooks support plate 21, and another part second clip 53 passes dodges breach 213 and hooks support plate 21. The base end 31 is further provided with a third hook 313, and the third hook 313 passes through the first buckling hole 211 to hook the carrier 21.

In the process of assembling the LED light source 20, the cylindrical light guide 30 and the reflective ring 50, the cylindrical light guide 30 is first connected and fixed on the carrier plate 21, that is, the positioning post 312 is directly opposite to the first positioning hole 212 and inserted into the first positioning hole 212, so as to quickly position the cylindrical light guide 30, and the third hook 313 passes through the first hook hole 211 to hook the carrier plate 21. The reflective ring 50 is then mounted, i.e. the free end 32 of the cylindrical light guide 30 is passed through the through hole 51 of the reflective ring 50 and is hooked on the carrier plate 21 by the second hook 53. Thus, the LED light source 20, the cylindrical light guide 30 and the reflective ring 50 are assembled to form a modular whole, and the modular whole can be assembled into the assembly space 11.

As shown in fig. 2, 3 and 6, the LED bulb further includes a heat dissipation plate 60 for conducting heat of the carrier plate 21, and the heat dissipation plate 60 is attached to a side of the carrier plate 21 away from the LED chip 22, so as to conduct heat on the carrier plate 21, so as to better achieve heat dissipation.

In the embodiment of the present invention, the heat dissipation plate 60 is provided with a second positioning hole 61 and a second fastening hole 62 opposite to the first fastening hole 211. The positioning post 312 passing through the first positioning hole 212 is also inserted into the second positioning hole 61, and the second hook 53 and the third hook 313 passing through the first fastening hole 211 both pass through the second fastening hole 62 to hook the heat dissipation plate 60, so as to fix the heat dissipation plate 60 on the carrier 21.

As shown in fig. 2, 3 and 6, the LED bulb further includes a base 101, the base 101 is connected to the bulb case 10 to form the assembly space 11, and a connection terminal of the LED light source 20 for connecting an external power supply is extended out of the base 101. In the embodiment of the present invention, the main body of the lamp holder 101 is made of metal, the bulb case 10 is made of transparent glass, and the open end of the bulb case 10 is fixedly connected to the open end of the lamp holder 101.

Further, as shown in fig. 2, 3 and 6, a housing 70 is disposed in the lamp cap 101, the housing 70 is located on a side of the heat dissipation plate 60 away from the cylindrical light guide 30, an outer wall of the housing 70 abuts against an inner wall of the lamp cap 101, wherein the housing 70 is made of an insulating material, and the heat dissipation plate 60 is sandwiched between the housing 70 and the open end of the bulb 10. In this way, the housing 70 spaces the electronic device provided on the carrier plate 21 from the metal base 101, and enhances insulation between the electronic device and the base 101.

When the heat dissipation plate 60 is assembled, the heat dissipation plate 60 is further provided with a communication notch 63 opposite to the avoidance notch 213, the second hook 53 which does not pass through the first hook hole 211 sequentially passes through the avoidance notch 213 and the communication notch 63 to hook the heat dissipation plate 60, and the assembly space 11 where the columnar light guide 30 is located is communicated with the assembly space 11 where the housing 70 is located by the communication notch 63.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An LED light bulb comprising:

a light-transmitting bulb (10), the bulb (10) having an assembly space (11);

an LED light source (20), the LED light source (20) being mounted in the assembly space (11), the LED light source (20) comprising an LED chip (22);

characterized in that, the LED bulb still includes:

the cylindrical light guide (30) is installed in the assembling space (11), the cylindrical light guide (30) is provided with a base end (31), the base end (31) is arranged corresponding to the LED chip (22), a plurality of strip-shaped prisms (33) are arranged on the circumferential side wall of the cylindrical light guide (30), the strip-shaped prisms (33) are arranged in parallel around the axis of the cylindrical light guide (30), and the extension direction of each strip-shaped prism (33) is basically parallel to the axis direction of the cylindrical light guide (30).

2. The LED bulb of claim 1,

the LED bulb further comprises a reflection ring (50), the cylindrical light guide (30) further comprises a free end (32) opposite to the base end (31), the reflection ring (50) is provided with a through hole (51) for the free end (32) to pass through, the reflection ring (50) is connected to the LED light source (20), and the surface of the reflection ring (50) facing away from the base end (31) is a first reflection surface (52).

3. The LED bulb of claim 2,

the LED bulb further comprises a conical reflector (40), the free end (32) is provided with a conical cavity (320) which is concave towards the base end (31), the conical reflector (40) is detachably mounted in the conical cavity (320), and the surface, facing the base end (31), of the conical reflector (40) is a second reflecting surface (41).

4. The LED bulb of claim 3,

the second reflecting surface (41) is attached to the wall surface of the conical cavity (320).

5. The LED bulb of claim 3,

the free end (32) is provided with at least two first clasps (321), the conical reflector (40) is provided with at least two buckling lugs (42), and the first clasps (321) correspondingly hook the buckling lugs (42).

6. The LED bulb according to any one of claims 1 to 5,

the base end (31) is provided with a receiving cavity (311), and the LED chip (22) is located in the receiving cavity (311).

7. The LED bulb of claim 6,

the LED light source (20) further comprises a carrier plate (21), the LED chip (22) is arranged on the carrier plate (21), the carrier plate (21) is further provided with a first positioning hole (212), the base end (31) is further provided with a positioning column (312), the positioning column (312) is inserted into the first positioning hole (212), and the base end (31) is connected to the carrier plate (21).

8. The LED bulb of claim 7,

the LED bulb further comprises a heat dissipation disc (60) used for conducting heat of the carrier plate (21), and the heat dissipation disc (60) is attached to one side, away from the LED wafer (22), of the carrier plate (21).

9. The LED bulb of claim 8,

the LED bulb further comprises a lamp holder (101), the lamp holder (101) is connected with the bulb shell (10) to form the assembling space (11), and a connecting terminal of the LED light source (20) used for being connected with an external power supply penetrates out of the lamp holder (101).

10. The LED bulb of claim 9,

be equipped with casing (70) in lamp holder (101), casing (70) are located heat dissipation dish (60) deviate from one side of column light guide (30), the outer wall of casing (70) pastes the inner wall of lamp holder (101), heat dissipation dish (60) press from both sides and locate casing (70) with between the open end of cell-shell (10).

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