CN203036351U - LED (Light-Emitting Diode) lamp tube with large light-emitting angle of 120 degrees to 360 degrees - Google Patents
LED (Light-Emitting Diode) lamp tube with large light-emitting angle of 120 degrees to 360 degrees Download PDFInfo
- Publication number
- CN203036351U CN203036351U CN2013201351754U CN201320135175U CN203036351U CN 203036351 U CN203036351 U CN 203036351U CN 2013201351754 U CN2013201351754 U CN 2013201351754U CN 201320135175 U CN201320135175 U CN 201320135175U CN 203036351 U CN203036351 U CN 203036351U
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- China
- Prior art keywords
- lamp bar
- led lamp
- led
- light
- mounting plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000003292 glue Substances 0.000 claims description 54
- 230000005855 radiation Effects 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 241000193935 Araneus diadematus Species 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000011324 bead Substances 0.000 abstract description 3
- 239000011049 pearl Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/104—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening using feather joints, e.g. tongues and grooves, with or without friction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S4/00—Lighting devices or systems using a string or strip of light sources
- F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
- F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/20—Light sources with three-dimensionally disposed light-generating elements on convex supports or substrates, e.g. on the outer surface of spheres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The utility model discloses an LED (Light-Emitting Diode) lamp tube with a large light-emitting angle of 120 degrees to 360 degrees. The LED lamp tube comprises a rubber cover, an LED lamp strip and a lamp bar fixed seat, wherein the LED lamp bar comprises an LED lamp bead and a circuit board, an axial opening is formed in the rubber cover, the two sides of the lamp bar fixed seat are clamped at the axial opening, and the lamp bar fixed seat is provided with one to four mounting planes coaxial with the rubber cover and is used for mounting the LED lamp bar. According to the LED lamp tube, the two sides of the lamp bar fixed seat are clamped at the axial opening, so that the angle (relative to the central axis of the rubber cover) of light irradiated from the LED lamp bar onto the rubber cover is greater than 120 degrees, and ranges from 120 degrees to 360 degrees, the whole LED lamp tube has no black area through the light reflection of the rubber cover, so that the black area can be greatly reduced, the light is spread uniformly, and light is clear and bright through the light diffraction of the rubber cover.
Description
Technical field
The utility model relates to a kind of LED fluorescent tube, particularly relates to the LED fluorescent tube of a kind of 120-360 ° big lighting angle.
Background technology
The LED fluorescent tube is that the bead weld of LED lamp is amassed on the plate (PCB) at aluminium at present, be attached on the aluminum hull with heat-conducting glue and dispel the heat, utilize driver transformation, voltage stabilizing, current limliting, LED lamp pearl is luminous in the energising back, the use power of every LED lamp pearl all has certain scope, and the root a tree name requires the power output size and the number of configuration installation LED lamp pearl, and according to firm power designing driver specification, be not that any LED at will joins any driver, otherwise cause LED to destroy.Public illumination is used in the open market, all based on fluorescent lamp.These fluorescent lamps all are contained on support or the lamp panel, and major part all utilizes the reflective refraction principle of support or lamp panel to increase its illuminance.Compare with existing glimmering turning off the light, the LED lamp can be saved the electricity charge of 55%-65%, the LED fluorescent tube is installed very simple, during installation original fluorescent lamp taken off and change the LED fluorescent tube, and ballast and starter removed, if adopt AC power, then the electric main of 85V-265V directly is added to the LED lamp tube ends and gets final product, if adopt dc source, then 15V is caused the 220V direct current and directly be added to the LED lamp tube ends and get final product.The LED lamp tube service life is more than 10 times of common fluorescent tube, almost is non-maintaining, does not have the problem that will often change fluorescent tube, ballast, starter, and the expense of saving of getting off half a year approximately just can gain cost.The LED lamp is the semi-conductor electricity light source of environmental type; light is soft; color is pure; be conducive to workman's sight protectio and healthy; yet there is following shortcoming in existing LED lamp: the LED lamp is output light source 120 degree only only, and brightness irregularities has stronger optically focused; use lamp panel and reflective support then can not bring into play catadioptric effect, people must stand in the front of LED lamp and just can experience than higher brightness.
Summary of the invention
The purpose of this utility model is the LED fluorescent tube that a kind of 120-360 ° big lighting angle is provided in order to address the above problem.
The utility model is achieved through the following technical solutions:
The LED fluorescent tube of 120-360 described in the utility model ° big lighting angle, comprise glue cover, LED lamp bar and lamp bar holder, described LED lamp bar comprises LED lamp pearl and circuit board, described glue is covered with axially open, the both sides of described lamp bar holder are installed in described axially open place, and it is individual homoaxial for the mounting plane that described LED lamp bar is installed with described glue cover that described lamp bar holder is provided with 1-4.
The bead weld of LED lamp is connected on formation LED lamp bar on the circuit board, LED lamp bar is installed on the mounting plane of lamp bar holder, provide illumination after the light process glue cover scattering that LED lamp pearl sends, every LED lamp bar comprises many LED lamp pearls.Because axially open is positioned at a side of glue cover central axis, so the light that LED lamp bar sends with respect to the lighting angle of glue cover central axis greater than 120 °, between 120-360 °, after by the glue cover light being reflected, make whole piece LED fluorescent tube without any the black area or reduce the black area greatly.
Particularly, described mounting plane can and be positioned at described axially open place for one, and described mounting plane is over against the axial line of described glue cover.
Described mounting plane also can and be positioned at described axially open inboard for two, and two described mounting planes interconnect and are " Λ " shape, and the cross spider of described " Λ " shape mounting plane is over against the axial line of described glue cover.In this structure, the angle angle of " Λ " shape mounting plane should guarantee that the light-emitting zone that is installed on two LED lamp bars on the mounting plane respectively has the crosspoint on the glue cover or in the glue cover, to guarantee the tight linking between the light that two LED lamp bars send.
Described mounting plane can also and be positioned at described axially open inboard for three, and three described mounting planes interconnect and are " ∏ " shape, and the mid-plane of described " ∏ " shape mounting plane is over against the axial line of described glue cover.In this structure, relative position between three mounting planes need guarantee that the light-emitting zone that is installed on the LED lamp bar on adjacent two mounting planes respectively has the crosspoint on the glue cover or in the glue cover, to guarantee the tight linking between the light that two adjacent LEDs lamp bar sends.
As preferably, the outside of described lamp bar holder is provided with the heat radiation groove; Described lamp bar holder is aluminium seat or copper seat; Described LED lamp bar is installed on the mounting plane of described lamp bar holder by heat-conducting glue.The heat that LED lamp bar sends conducts to the outside by lamp bar holder and is dispersed in the air, and the heat radiation groove is conducive to increase surface area, improves radiating effect.
Described mounting plane can also for four and interconnect and be the square, described square mounting plane and described glue cover coaxial inner conductor.
The beneficial effects of the utility model are:
The utility model is installed in the axially open place of glue cover by the both sides with lamp bar holder, make LED lamp bar shine light on the glue cover with respect to the lighting angle of glue cover central axis greater than 120 °, between 120-360 °, after by the glue cover light being reflected, make whole piece LED fluorescent tube without any the black area or reduce the black area greatly, light disseminates evenly, and light can make light more clear bright through the glue cover of astigmatism effect; No matter lamp bar holder of the present utility model adopts one, two, three still four mounting planes, and its structure is all very simple, adopts and clamps structure, and is easy for installation, quick, and by the heat radiation groove is set, makes whole fluorescent tube satisfy the heat radiation requirement.
Description of drawings
Fig. 1 is one of the cross-sectional structure schematic diagram of the LED fluorescent tube of 120-360 described in the utility model ° big lighting angle;
Fig. 2 be 120-360 described in the utility model ° big lighting angle the LED fluorescent tube the cross-sectional structure schematic diagram two;
Fig. 3 be 120-360 described in the utility model ° big lighting angle the LED fluorescent tube the cross-sectional structure schematic diagram three;
Fig. 4 be 120-360 described in the utility model ° big lighting angle the LED fluorescent tube the cross-sectional structure schematic diagram four.
Among the figure: 1-glue cover, 2-lamp bar holder, 3-circuit board, 4-LED lamp pearl.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments:
Embodiment 1:
As shown in Figure 1, the LED fluorescent tube of 120-360 described in the utility model ° big lighting angle comprises glue cover 1, LED lamp bar and lamp bar holder 2, LED lamp bar comprises LED lamp pearl 4 and circuit board 3, glue cover 1 is provided with axially open (unmarked among the figure), the both sides of lamp bar holder 2 are installed in the axially open place, this clamps structure: the both sides of lamp bar holder 2 are provided with draw-in groove (unmarked among the figure), and the axially open both sides of glue cover 1 are provided with card article (unmarked among the figure), and card article places in the draw-in groove; Lamp bar holder 2 be provided with 1 homoaxial for the mounting plane (figure is unmarked) that LED lamp bar is installed with glue cover 1, mounting plane is positioned at the axially open place and over against the axial line of glue cover 1, LED lamp bar is one and is installed on by heat-conducting glue on the mounting plane of lamp bar holder 2.The outside of lamp bar holder 2 is provided with heat radiation groove (unmarked among the figure), and lamp bar holder 2 is aluminium seat or copper seat.
In this structure, because the lighting angle of LED lamp pearl 4 self is 120 ° (seeing the arrow among Fig. 1), and LED lamp pearl 4 is positioned at below one side of the central axis of glue cover 1, so it still was 120 ° with respect to LED lamp bar after the illumination of whole LED lamp bar was mapped on the glue cover 1, but for the central axis of glue cover 1 then necessarily greater than 120 °, be about 200 °, and the lighting angle of our whole fluorescent tube in general refers to shine light on the glue cover 1 with respect to the angle of the central axis of glue cover 1, so, the lighting angle of the LED fluorescent tube in the present embodiment is greater than 120 °, and the structure of lamp bar holder 2 is very simple, is convenient to processing and assembling.
Embodiment 2:
As shown in Figure 2, lamp bar holder 2 be provided with two homoaxial for the mounting plane (figure is unmarked) that LED lamp bar is installed with glue cover 1, it is inboard and interconnect and be " Λ " shape that two mounting planes are positioned at axially open, the cross spider of " Λ " shape mounting plane is over against the axial line of glue cover 1, and LED lamp bar is two and is installed on respectively by heat-conducting glue on two mounting planes of lamp bar holder 2.All the other structures and embodiment 1 are identical.
In this structure, because the lighting angle of LED lamp pearl 4 self is 120 ° (seeing the arrow among Fig. 2), after the light that two LED lamp bars send is connected, the central axis of the relative glue cover 1 of whole light-emitting zone is much larger than 120 °, be about 300 °, namely the lighting angle of the LED fluorescent tube in the present embodiment is about 300 ° much larger than 120 °, and the structure of lamp bar holder 2 is very simple, is convenient to processing and assembling.
Embodiment 3:
As shown in Figure 3, lamp bar holder 2 be provided with three homoaxial for the mounting plane (figure is unmarked) that LED lamp bar is installed with glue cover 1, it is inboard and interconnect and be " П " shape that three mounting planes are positioned at axially open, the mid-plane of " ∏ " shape mounting plane is over against the axial line of glue cover 1, and LED lamp bar is three and is installed on respectively by heat-conducting glue on three mounting planes of lamp bar holder 2.All the other structures and embodiment 1 are identical.
In this structure, because the lighting angle of LED lamp pearl 4 self is 120 ° (seeing the arrow among Fig. 3), after the light that two adjacent LEDs lamp bar sends is connected, the central axis of the relative glue cover 1 of whole light-emitting zone is much larger than 120 °, be about 330 °, namely the lighting angle of LED fluorescent tube is about 330 ° much larger than 120 ° in the present embodiment, and the structure of lamp bar holder 2 is very simple, is convenient to processing and assembling.
Embodiment 4:
As shown in Figure 4, lamp bar holder 2 be provided with four homoaxial for the mounting plane (figure is unmarked) that LED lamp bar is installed with glue cover 1, four mounting planes interconnect and are square, square mounting plane and glue cover 1 coaxial inner conductor, LED lamp bar is four and is installed on respectively by heat-conducting glue on three mounting planes of lamp bar holder 2.All the other structures and embodiment 1 are identical.
In this structure, because the lighting angle of LED lamp pearl 4 self is 120 ° (seeing the arrow among Fig. 3), after the light that two adjacent LEDs lamp bar sends was connected, the central axis of the relative glue cover 1 of whole light-emitting zone was much larger than 120 °, can reach 360 °, the whole LED fluorescent tube does not have the dark space.
Claims (8)
1. the LED fluorescent tube of a 120-360 ° of big lighting angle, comprise glue cover, LED lamp bar and lamp bar holder, described LED lamp bar comprises LED lamp pearl and circuit board, it is characterized in that: described glue is covered with axially open, the both sides of described lamp bar holder are installed in described axially open place, and it is individual homoaxial for the mounting plane that described LED lamp bar is installed with described glue cover that described lamp bar holder is provided with 1-4.
2. the LED fluorescent tube of 120-360 according to claim 1 ° big lighting angle, it is characterized in that: described mounting plane is one and is positioned at described axially open place that described mounting plane is over against the axial line of described glue cover.
3. the LED fluorescent tube of 120-360 according to claim 1 ° big lighting angle, it is characterized in that: described mounting plane is two and is positioned at described axially open inboard, two described mounting planes interconnect and are " Λ " shape, and the cross spider of described " Λ " shape mounting plane is over against the axial line of described glue cover.
4. the LED fluorescent tube of 120-360 according to claim 1 ° big lighting angle, it is characterized in that: described mounting plane is three and is positioned at described axially open inboard, three described mounting planes interconnect and are " ∏ " shape, and the mid-plane of described " ∏ " shape mounting plane is over against the axial line of described glue cover.
5. according to the LED fluorescent tube of the described 120-360 of any one claim ° big lighting angle among the claim 1-4, it is characterized in that: the outside of described lamp bar holder is provided with the heat radiation groove.
6. according to the LED fluorescent tube of the described 120-360 of any one claim ° big lighting angle among the claim 1-4, it is characterized in that: described lamp bar holder is aluminium seat or copper seat.
7. according to the LED fluorescent tube of the described a kind of 120-360 ° big lighting angle of any one claim among the claim 1-4, it is characterized in that: described LED lamp bar is installed on the mounting plane of described lamp bar holder by heat-conducting glue.
8. the LED fluorescent tube of 120-360 according to claim 1 ° big lighting angle is characterized in that: described mounting plane is four and interconnects and be square, described square mounting plane and described glue cover coaxial inner conductor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201351754U CN203036351U (en) | 2013-03-22 | 2013-03-22 | LED (Light-Emitting Diode) lamp tube with large light-emitting angle of 120 degrees to 360 degrees |
| PCT/CN2013/087087 WO2014146438A1 (en) | 2013-03-22 | 2013-11-13 | Led tube with large beaming angle of 120 degrees to 360 degrees |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201351754U CN203036351U (en) | 2013-03-22 | 2013-03-22 | LED (Light-Emitting Diode) lamp tube with large light-emitting angle of 120 degrees to 360 degrees |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203036351U true CN203036351U (en) | 2013-07-03 |
Family
ID=48688477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201351754U Expired - Fee Related CN203036351U (en) | 2013-03-22 | 2013-03-22 | LED (Light-Emitting Diode) lamp tube with large light-emitting angle of 120 degrees to 360 degrees |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203036351U (en) |
| WO (1) | WO2014146438A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453373A (en) * | 2013-09-19 | 2013-12-18 | 上虞远东照明有限公司 | LED lamp tube |
| WO2014146438A1 (en) * | 2013-03-22 | 2014-09-25 | Lin Lapwah | Led tube with large beaming angle of 120 degrees to 360 degrees |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016002910B4 (en) | 2016-03-11 | 2018-04-26 | Nicola Barthelme | Fully encapsulated, flexible light-emitting diode strip with homogeneous light emission and 360 ° radiation and method for its production |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201448641U (en) * | 2009-05-30 | 2010-05-05 | 陈展新 | LED energy-saving high-light lamp tube |
| CN201521835U (en) * | 2009-11-20 | 2010-07-07 | 大连森谷新能源电力技术有限公司 | Novel LED semi-conductive fluorescent lamp |
| CN201827713U (en) * | 2010-09-21 | 2011-05-11 | 柯志鹏 | LED energy-saving lamp with wide-angle luminous surface |
| CN202203724U (en) * | 2011-09-02 | 2012-04-25 | 深圳市奥拓光电科技有限公司 | Large-irradiation-angle LED fluorescent lamp |
| CN202432323U (en) * | 2012-01-16 | 2012-09-12 | 深圳翼天科技有限公司 | Energy-saving LED (light-emitting diode) light tube |
| CN202521311U (en) * | 2012-03-09 | 2012-11-07 | 杭州捷成光电科技有限公司 | LED (light-emitting diode) fluorescent lamp with large light-emitting angle |
| CN202812970U (en) * | 2012-09-27 | 2013-03-20 | 浙江福斯特电子科技有限公司 | Single-row light emitting diode (LED) fluorescent lamp with large illuminating angle |
| CN203036351U (en) * | 2013-03-22 | 2013-07-03 | 杜骞 | LED (Light-Emitting Diode) lamp tube with large light-emitting angle of 120 degrees to 360 degrees |
-
2013
- 2013-03-22 CN CN2013201351754U patent/CN203036351U/en not_active Expired - Fee Related
- 2013-11-13 WO PCT/CN2013/087087 patent/WO2014146438A1/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014146438A1 (en) * | 2013-03-22 | 2014-09-25 | Lin Lapwah | Led tube with large beaming angle of 120 degrees to 360 degrees |
| CN103453373A (en) * | 2013-09-19 | 2013-12-18 | 上虞远东照明有限公司 | LED lamp tube |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014146438A1 (en) | 2014-09-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20160322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |