CN103166167A - Protection device for flashover of cold cathode lamp tube - Google Patents
Protection device for flashover of cold cathode lamp tube Download PDFInfo
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- CN103166167A CN103166167A CN2011104209900A CN201110420990A CN103166167A CN 103166167 A CN103166167 A CN 103166167A CN 2011104209900 A CN2011104209900 A CN 2011104209900A CN 201110420990 A CN201110420990 A CN 201110420990A CN 103166167 A CN103166167 A CN 103166167A
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- cold cathode
- transformer
- electrically connected
- fluorescent lamp
- cathode fluorescent
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Abstract
Disclosed is a protection device for flashover of a cold cathode lamp tube. The protection device for flashover of the cold cathode lamp tube is used on a transformer which supplies power to the cold cathode lamp tube. The protection device for flashover comprises a circuit board and a protection module, wherein the circuit board comprises a board body and an electric conducting plate which is arranged on the board body and is electrically connected with the transformer. The electric conducting plate is provided with a connection part and an installation part, and the connection part is adjacent to and is electrically connected with the transformer. The protection module comprises a hot melting lead wire and a protection shell, wherein the hot melting lead wire is electrically connected with the transformer, the protection shell is arranged in the installation part, the hot melting lead wire is contained in the protection shell, and the protection shell undergoes breakdown when flashover occurs to the installation part. Due to the fact that the hot melting lead wire is arranged, electricity is enabled to be cut off and the circuit is enabled to be protected when the flashover occurs. A damaged area is indicated by the protection shell which undergoes breakdown after the flashover occurs, so that subsequent maintenance operation is simplified.
Description
Technical field
The present invention relates to a kind of Protector for electric appliances, particularly relate to a kind of cold cathode fluorescent lamp arcing protective device.
Background technology
In existing cold cathode fluorescent lamp lamp circuit, be mainly with a transformer, this cold cathode fluorescent lamp (CCFL) to be carried out High Voltage Power Supply, luminous to order about this cold cathode fluorescent lamp by the high voltage that this transformer produces.
Yet, when the fluorescent tube abnormal, during as situations such as fluorescent tube fracture, gas leakage, loose contacts, this transformer produces high-tension zone can produce electrion phenomenon (being exactly the arcing phenomenon that is commonly called as), if there is no powered-down this moment, electronic equipment arround can causing produces and damages, if continue to produce spark, also has the danger that causes fire.
Summary of the invention
The object of the present invention is to provide a kind of cold cathode fluorescent lamp arcing protective device that the arcing protection can be provided.
Cold cathode fluorescent lamp arcing protective device of the present invention is applied to a transformer to a cold cathode fluorescent lamp power supply, and this arcing protective device comprises a circuit board and a protection module.
This circuit board comprises a plate body; and conducting strip that is arranged at this plate body and is electrically connected to this transformer; this conducting strip has a connecting portion and an installation portion; this connecting portion is contiguous and be electrically connected to this transformer; this protection module comprises a heat-fusible conductive wire that is electrically connected to this transformer, and a containment vessel that is arranged at this installation portion and accommodating this heat-fusible conductive wire and is punctured when this installation portion arcing.
Cold cathode fluorescent lamp arcing protective device of the present invention, the material of this containment vessel is plastic cement.
Cold cathode fluorescent lamp arcing protective device of the present invention, the material of this conducting strip is copper.
Cold cathode fluorescent lamp arcing protective device of the present invention, the geometric center on this containment vessel and this installation portion surface adjacent one another are is identical in fact.
Cold cathode fluorescent lamp arcing protective device of the present invention, this transformer comprise a high level input and a low level input, and this heat-fusible conductive wire is electrically connected on this high level input.
Cold cathode fluorescent lamp arcing protective device of the present invention, this transformer also comprise a high level output end and a low level output end, and this high level output end is electrically connected to this cold cathode fluorescent lamp and vicinity and is electrically connected to the connecting portion of this conducting strip.
Cold cathode fluorescent lamp arcing protective device of the present invention, this transformer comprise a high level output end and a low level output end, and this high level output end is electrically connected to this cold cathode fluorescent lamp and vicinity and is electrically connected to the connecting portion of this conducting strip.
Beneficial effect of the present invention is: by the setting of this heat-fusible conductive wire, can power-off protecting circuit when arcing is occured, and express affected area with this containment vessel after being subject to arcing and puncturing, and the operation when simplifying follow-up maintenance.
Description of drawings
Fig. 1 is the three-dimensional combination figure that a preferred embodiment of cold cathode fluorescent lamp arcing protective device of the present invention is applied to a transformer;
Fig. 2 is the three-dimensional exploded view that this preferred embodiment is applied to this transformer;
Fig. 3 is the circuit diagram that this preferred embodiment is applied to this transformer;
Fig. 4 is the circuit diagram that this preferred embodiment is applied to this transformer, illustrates that the first of this transformer is implemented aspect;
Fig. 5 is the circuit diagram that this preferred embodiment is applied to this transformer, illustrates that the second of this transformer is implemented aspect;
Fig. 6 is the circuit diagram that this preferred embodiment is applied to this transformer, and the third enforcement aspect of this transformer is described.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
consult Fig. 1, 2, 3, this preferred embodiment of cold cathode fluorescent lamp arcing protective device of the present invention is a transformer 4 that is applied to 5 power supplies of a cold cathode fluorescent lamp, this transformer 4 comprises a high level input 41, a low level input 42, a high level output end 43, and low level output end 44, when this high level input 41 and this low level input 42 input low-voltage, can produce high voltage in this high level output end 43 and this low level output end 44, and this cold cathode fluorescent lamp 5 that two ends are electrically connected to respectively this high level output end 43 and this low level output end 44 is carried out High Voltage Power Supply, in the present embodiment, the range of nominal tension of this high level output end 43 and the 44 common outputs of this low level output end is 1000V～1500V.
This arcing protective device comprises a circuit board 2, and a protection module 3.
This circuit board 2 comprises a plate body 21, and a conducting strip 22 that is arranged at this plate body 21 and is electrically connected to this transformer 4.In the present embodiment, the material of this conducting strip 22 is copper.
This conducting strip 22 has a connecting portion 221 and an installation portion 222, and this connecting portion 221 is close to and is electrically connected on this high level output end 43 of this transformer 4.
This protection module 3 comprises that an end is electrically connected to the heat-fusible conductive wire 31 of these high level input 41 other ends electrical connection one power supply (not shown) of this transformer 4; and a containment vessel 32 that is arranged at this installation portion 222 and accommodating this heat-fusible conductive wire 31, this containment vessel 32 and this installation portion 222 toward each other the surface geometric center identical in fact.In the present embodiment, the material of this containment vessel 32 is plastic cement, and can be subject to the arc over that high voltage produces when this installation portion 222 arcing, and this heat-fusible conductive wire 31 can then be subject to the high heat that arc discharge causes and fusing disconnects.
During normal the use, after this high level output end 43 and this low level output end 44 carry out High Voltage Power Supply to this cold cathode fluorescent lamp 5 respectively, just can order about these cold cathode fluorescent lamp 5 conductings and luminous.
and when making this high level output end 43 produce high electric current because of load abnormal when these cold cathode fluorescent lamp 5 abnormal situations, this high electric current can be passed to this installation portion 222 by this connecting portion 221, and produce the phenomenon of arcing in this installation portion 222, the high voltage arc discharge that produce this moment can puncture this containment vessel 32, the high heat of supervening can disconnect these heat-fusible conductive wire 31 fusings, this high level input 41 that is electrically connected to this heat-fusible conductive wire 31 is disconnected with power supply, this moment, this high level output end 43 and this low level output end 44 can not continue this cold cathode fluorescent lamp 5 is carried out High Voltage Power Supply again, and then avoid the arcing phenomenon continue to occur and near electronic component is produced destroy, and can avoid because continuing the issuable fire problem of arcing phenomenon.In details of the words, therefore installation portion 222 is electrically connected to this high level output end 43 has the high level output current potential, therefore heat-fusible conductive wire 31 is electrically connected to this high level input 41 has high level input current potential, because output potential is to amplify input current potential later, so output potential is necessarily far above the input current potential, thereby the current potential of installation portion 222 is far above the current potential of heat-fusible conductive wire 31, both form a path the shortest because of the arrangement of position in addition, when the voltage difference when between the two increases extremely, must produce in herein the arcing phenomenon.In addition, this containment vessel 32 and this installation portion 222 geometric center on surface toward each other are identical in fact, are namely the formation in order to ensure described the shortest path.
Be noted that this transformer 4 can present with different forms, in three kinds of following enforcement aspects, respectively the enforcement aspect of three kinds of transformers 4 explained.
Consult Fig. 4, implement in aspect in the first, this transformer 4 is made of first lateral coil 45 and second lateral coil 46, this first lateral coil 45 and this second lateral coil 46 have opposite a first end and second end separately, the first end of this first lateral coil 45 is electrically connected to this high level input 41, the second end of this first lateral coil 45 is electrically connected to this low level input 42, the first end of this second lateral coil 46 is electrically connected to this high level output end 43, and the second end of this second lateral coil 46 is electrically connected to this low level output end 44.
Consult Fig. 5, implement in aspect in the second, this transformer 4 is made of two the first lateral coils 45 and two the second lateral coils 46, and described the first lateral coil 45 and described the second lateral coil 46 have opposite a first end and second end separately.
In the first lateral coil 45 and the second lateral coil 46 above in Fig. 5, the first end of this first lateral coil 45 is electrically connected to this high level input 41, the second end ground connection of this first lateral coil 45, the first end of this second lateral coil 46 is electrically connected to this high level output end 43, the second end ground connection of this second lateral coil 46.
In the first lateral coil 45 and the second lateral coil 46 below in Fig. 5, the first end of this first lateral coil 45 is electrically connected to this high level input 41, the second end ground connection of this first lateral coil 45 also is electrically connected to this low level input 42, the first end of this second lateral coil 46 is electrically connected to this low level output end 44, the second end ground connection of this second lateral coil 46.
Consult Fig. 6, implement in aspect in the third, this transformer 4 is made of two the first lateral coils 45 and two the second lateral coils 46, and described the first lateral coil 45 and described the second lateral coil 46 have opposite a first end and second end separately.
In the first lateral coil 45 and the second lateral coil 46 above in Fig. 6, the first end of this first lateral coil 45 is electrically connected to this high level input 41, the first end of this second lateral coil 46 is electrically connected to this high level output end 43, the second end ground connection of this second lateral coil 46.
In the first lateral coil 45 and the second lateral coil 46 below in Fig. 6, the first end of this first lateral coil 45 is electrically connected to the second end of the first lateral coil 45 of top, the second end ground connection of this first lateral coil 45 of below also is electrically connected to this low level input 42, the first end of this second lateral coil 46 is electrically connected to this low level output end 44, the second end ground connection of this second lateral coil 46.
It is worth mentioning that, the enforcement aspect of aforesaid three kinds of transformers 4 is the application examples in the present invention, and the application of the transformer 4 of other types does not break away from category of the present invention equally.
In sum; by the setting of this heat-fusible conductive wire 31, energy power-off protecting circuit when arcing is occured, and can utilize this containment vessel 32 after being punctured to express affected area; and simplify the operation that follow-up when maintenance search impaired circuit, so really can reach purpose of the present invention.
Claims (7)
1. cold cathode fluorescent lamp arcing protective device, be applied to a transformer to a cold cathode fluorescent lamp power supply, it is characterized in that: this arcing protective device comprises a circuit board and a protection module, this circuit board comprises a plate body, and conducting strip that is arranged at this plate body and is electrically connected to this transformer, this conducting strip has a connecting portion and an installation portion, this connecting portion is contiguous and be electrically connected to this transformer, this protection module comprises a heat-fusible conductive wire that is electrically connected to this transformer, and containment vessel that is arranged at this installation portion and accommodating this heat-fusible conductive wire and is punctured when this installation portion arcing.
2. cold cathode fluorescent lamp arcing protective device according to claim 1, it is characterized in that: the material of this containment vessel is plastic cement.
3. cold cathode fluorescent lamp arcing protective device according to claim 1, it is characterized in that: the material of this conducting strip is copper.
4. cold cathode fluorescent lamp arcing protective device according to claim 1 is characterized in that: the geometric center on this containment vessel and this installation portion surface adjacent one another are is identical in fact.
5. cold cathode fluorescent lamp arcing protective device according to claim 1, it is characterized in that: this transformer comprises a high level input and a low level input, and this heat-fusible conductive wire is electrically connected on this high level input.
6. cold cathode fluorescent lamp arcing protective device according to claim 5; it is characterized in that: this transformer also comprises a high level output end and a low level output end, and this high level output end is electrically connected to this cold cathode fluorescent lamp and vicinity and is electrically connected to the connecting portion of this conducting strip.
7. cold cathode fluorescent lamp arcing protective device according to claim 1; it is characterized in that: this transformer comprises a high level output end and a low level output end, and this high level output end is electrically connected to this cold cathode fluorescent lamp and vicinity and is electrically connected to the connecting portion of this conducting strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104209900A CN103166167A (en) | 2011-12-15 | 2011-12-15 | Protection device for flashover of cold cathode lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104209900A CN103166167A (en) | 2011-12-15 | 2011-12-15 | Protection device for flashover of cold cathode lamp tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103166167A true CN103166167A (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104209900A Pending CN103166167A (en) | 2011-12-15 | 2011-12-15 | Protection device for flashover of cold cathode lamp tube |
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| Country | Link |
|---|---|
| CN (1) | CN103166167A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2308221Y (en) * | 1997-06-24 | 1999-02-17 | 胡宏杰 | Ballast, transformer with double protection |
| TW434963B (en) * | 1999-06-28 | 2001-05-16 | Lien Chang Electronic Entpr Co | Protection circuit |
| WO2010123278A2 (en) * | 2009-04-21 | 2010-10-28 | Smart Electronics Inc. | Small fuse and manufacturing method thereof |
-
2011
- 2011-12-15 CN CN2011104209900A patent/CN103166167A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2308221Y (en) * | 1997-06-24 | 1999-02-17 | 胡宏杰 | Ballast, transformer with double protection |
| TW434963B (en) * | 1999-06-28 | 2001-05-16 | Lien Chang Electronic Entpr Co | Protection circuit |
| WO2010123278A2 (en) * | 2009-04-21 | 2010-10-28 | Smart Electronics Inc. | Small fuse and manufacturing method thereof |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130619 |