CN101685722B - Double temperature-sensing power-off circuit protection structure - Google Patents
Double temperature-sensing power-off circuit protection structure Download PDFInfo
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- CN101685722B CN101685722B CN2008101663904A CN200810166390A CN101685722B CN 101685722 B CN101685722 B CN 101685722B CN 2008101663904 A CN2008101663904 A CN 2008101663904A CN 200810166390 A CN200810166390 A CN 200810166390A CN 101685722 B CN101685722 B CN 101685722B
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Abstract
The invention provides a double temperature-sensing power-off circuit protection structure, comprising two independently working temperature-sensing power-off devices arranged between two terminals of a return circuit, a thermal sensing tripping device and a thermal breaking device. A contact striking flake of the thermal sensing tripping device is heated and deformed to reversely bend to trip out in order to realize interruption under the conditions of overload current, overheating circuits or excess high temperature of environment. Besides, when the thermal sensing tripping device fails to respond, respond late or repetitively powers off and the temperature of the return circuit continuously rises after powering on under the conditions of overload current, overheating circuits or excess high temperature of environment, a low-melting point block of the thermal breaking device is heated to be melted and broken in order to open the return circuit and realize interruption. In the invention, the two independently working temperature-sensing power-off devices respectively sense temperature, have a double temperature-sensing power-off effect, and the return circuit can be temporarily powered off, powered on again or completely powered off, thereby avoiding dangers of overheating circuits or short circuit of electric wires.
Description
Technical field
The present invention is relevant for a kind of circuit protection structure of double-temperature-sensing cut-off, and it is provided with a thermoinduction tripping device and a thermal cutout device at circuit loop, forms the temperature-sensing cut-off device of two independent runnings; At current overload, circuit is overheated or ambient temperature when too high, utilize the formation of thermoinduction tripping device can recover the temporary off-position of switching on again, or further utilize the meltable block fusion, cracked of thermal cutout device, form nonvolatil circuit breaker (OFF) state.
Background technology
Electrification is that modern humans society can not the missing link, and various electric equipment products and equipment is around arround the life, especially computerization, informationalized industry, at home, traffic, education, amusement or the like, do not have electricity especially and do not become.Relative, the electricity consumption that makes of safety also is that the modern have to be cautious.
In general, in the integrated circuit loop that electricity is provided, be provided with the master switch of power supply control, usually master switch is the state of energising (ON), fuse or circuit breaker are set on it, when the electrical equipment that uses in the circuit loop too much causes situations such as current overload or short circuit, circuit be overheated, blown fuse or circuit breaker escape and form (OFF) state that opens circuit in integrated circuit loop.
In addition, in the integrated circuit loop, each other circuit loop arranged again, establish the switch of control in the circuit loop in addition again, this switch mainly is to carry out energising (ON) and outage (OFF) two kinds of actuating travels of current circuit out of the ordinary, for strengthening the fail safe of electricity consumption, many switches also have the function of current overload automatic escape outage when overheated, avoid the fuse in integrated circuit loop when current overload or circuit breaker real time reaction not to cut off the power supply or escape, and the danger that electric wire cocks off takes place.
Except aforementioned integrated circuit loop and circuit loop out of the ordinary; utilize fuse; the overheated automatic escape of the current overload of circuit breaker and switch; outside the cut-off structure; the single electronics of part; electric equipment products; for example: higher-priced electronic product; the electric heating appliance that the information equipment of deal with data or power consumption religion are higher etc.; also distinctly be provided with the circuit protection structure of temperature-sensing cut-off device; use this single electronics of protection; electric equipment products; at this single electronics; the current overload of electric equipment products own; when circuit is overheated; induction in real time and cutting off the power supply; avoid burning product itself; can avoid because of single electronics simultaneously; the problem of electric equipment products and cause each other circuit loop; the current overload in integrated circuit loop; overheating conditions causes circuit loop; the problem that other power consumption equipment in the integrated circuit loop can't operate.
Be used in the existing temperature-sensing cut-off protector of single electronic product, shown in Fig. 1～2, it is that a contact flat spring 101 is set in circuit, this contact flat spring 101 is made as bending, bounce being heated back distortion and back-flexing, one end of contact flat spring fixedly is mounted on the first terminal 102, the other end of contact flat spring 101 is a free end, the free end group is established first conductiving point 103, establish second conductiving point, 105, the second conductiving points 105 corresponding to first conductiving point 103 in second terminal, 104 fixing groups in addition; During enforcement, contact flat spring 101 keeps the direction bending to second terminal 104, the circuit communication state that second conductiving point 105 of contact flat spring 101 free-ended first conductiving points 103 and second terminal 104 is kept in touch, as shown in Figure 1; When current overload, contact flat spring 101 temperature distortions and back-flexing and bounce make contact flat spring 101 free-ended first conductiving points 103 separate with second conductiving point 105, become the state of circuitry cuts (OFF), as shown in Figure 2, can guarantee that the circuit of electronic product own avoids burning.So, the shortcoming of existing temperature-sensing cut-off protector is:
When (a) making contact flat spring 101, and thickness, flexibility and the architectural characteristic that can't guarantee each sheet contact flat spring 101 are identical, so be difficult to effectively control contact flat spring 101 in the reaction temperature value of back distortion and back-flexing spring of being heated, the temperature value error of setting induction is bigger.
(b) contact flat spring 101 is not high in the acuity of be heated back distortion and back-flexing spring, can't in time bring into play the protection of this electronic product when overload is overheated.
(c) contact flat spring 101 escape outage in real time or escape are incomplete, make circuit still be current conductive state, and circuit continues overheated and causes the danger of this electronic product and integrated circuit.
When the current overload circuit is overheated, if contact flat spring 101 is half escape state, rebound "on" position more again when contact flat spring 101 coolings, the formation spark that continues to switch on repeatedly, cuts off the power supply causes danger; And the electronics in the overall current loop, electric equipment cause the electric current instability because of switching on repeatedly, cutting off the power supply, and cause when machine or can't normal operation, shorten useful life, even infringement fully.
Summary of the invention
The technical problem that institute's desire solves:
The invention reside in the existing temperature-sensing cut-off protector of solution only has one to be the escape breaker device of temperature sense with the contact flat spring; can't effectively set the temperature sensor value of an outage; and; when current overload is overheated; if contact flat spring escape, escape in real time is incomplete or can't escape the time; circuit continues conducting or switches on repeatedly, cuts off the power supply and produce spark; cause the electric current instability cause electronic product work as machine, can't normal operation or shorten useful life, the variety of issue of infringement fully even.
The technological means of dealing with problems:
A kind of circuit protection structure of double-temperature-sensing cut-off includes a lid, a thermoinduction tripping device, a thermal cutout device, reaches a pedestal.This lid is electric conductor and connects a first terminal; This thermoinduction tripping device comprises a contact flat spring, a conductive connection part, and contact flat spring one end secure bond is in the lid inboard, and the free end group is established first conductiving point, and this conductive connection part is provided with one second conductiving point corresponding to aforesaid first conductiving point; This thermal cutout device comprises an electric conductor, a meltable block, and electric conductor one end is connected in conductive connection part, replaces electric conductor with meltable block, makes the movable contact of the other end (free end) one second terminal of electric conductor; Conductive connection part, electric conductor and meltable block are in pedestal.At current overload, when overheated or ambient temperature is too high,, and after temperature descends, recover to form circuit communication (ON) automatically earlier by this thermoinduction tripping device escape, outage (OFF); At current overload, overheated or ambient temperature is too high, and this thermoinduction tripping device is failed in real time or can't escape and when cutting off the power supply (OFF), the meltable block of this thermal cutout device promptly heats up because of continuing to be heated, after arriving the temperature of setting, fusion is cracked, the free end of electric conductor separates with second terminal, forms outage fully (OFF) state of circuit loop.
The beneficial effect of the invention:
The circuit protection structure of a kind of double-temperature-sensing cut-off of the present invention; its main purpose is by two temperature sense trippers independently; when current overload or circuit are overheated; can independent separately temperature sensor; make circuit loop cut off the power supply fully (OFF); have the dual temperature sense effect that opens circuit, guarantee aim of safe power utilization.
Another object of the present invention is to; when current overload, circuit is overheated or ambient temperature when too high; the first contact flat spring temperature distortion back-flexing escape by the thermoinduction tripping device cut off the power supply (OFF); need not to utilize that the meltable block of thermal cutout device is cracked reaches circuit loop outage (OFF); so can get rid of circuit loop overload factor; after contact flat spring cools; return to the state of energising (ON) again; the still sustainable use of circuit protection structure; need not new clothes one circuit brake, save time and reduce user's expenditure.
A further object of the present invention is; when current overload or circuit overheated; reactionless or the reaction of thermoinduction tripping device not as good as or outage (OFF) repeatedly, energising (ON) and when making temperature and continue rising; the further characteristic persistently overheating, the fusion fracture that is bound to of being heated of the meltable block by the thermal cutout device then; fusion, cracked when meltable block arrives the design temperature critical value; make circuit loop open circuit fully (OFF); guarantee safety utilization of electric power, in order to the various electrical appliances in the protective circuit loop.
Description of drawings
Fig. 1 is the assembled sectional view of prior art, and it shows the state of the conducting (ON) of prior art;
Fig. 2 is the assembled sectional view of prior art, and it shows the state of the escape outage (OFF) of prior art;
Fig. 3 is the three-dimensional exploded view of the embodiment of the invention;
Fig. 4 is the three-dimensional combination figure of the embodiment of the invention;
Fig. 5 is the schematic top plan view that the embodiment of the invention does not add lid, and it shows the state of the conducting (ON) of the embodiment of the invention;
Fig. 6 is the assembled sectional view of the embodiment of the invention, and it shows the state of the conducting (ON) of the embodiment of the invention;
Fig. 7 is the assembled sectional view of the embodiment of the invention, and it shows escape outage (OFF) signal of the general state of the embodiment of the invention;
Fig. 8 does not add the schematic top plan view of lid for the embodiment of the invention, it shows that the embodiment of the invention is when current overload, the thermoinduction tripping device is timely escape or can't the escape outage time, the meltable block of thermal cutout device is heated and fusion, cracked, forms cut off the power supply the fully signal of (OFF) of circuit loop.
[primary clustering symbol description]
10 lids
11 the first terminals
20 thermoinduction tripping devices
21 contact flat springs
211 first conductiving points
22 conductive connection parts
221 second conductiving points
222 gap slots
223 combined holes
30 thermal cutout devices
31 electric conductors
310 lugs
311 clip slots
312 free ends
32 meltable blocks
32 ' the remaining fragment
33 elastic components
34 second terminals
40 pedestals
41 are installed in groove
42 nose bars
43 protuberances
44 clip slots
45 grooves
46 combination slots
101 contact flat springs
102 the first terminals
103 first conductiving points
104 second terminals
105 second conductiving points
Embodiment
For disclosing purpose of the present invention, feature and effect in detail, now by following preferable specific embodiment, cooperate appended graphicly, the present invention is described in detail as the back:
Shown in Fig. 3～6, be three-dimensional exploded view, three-dimensional combination figure, assembled sectional view, the assembled sectional view of the embodiment of the invention, it shows energising (ON) signal of the embodiment of the invention; The circuit protection structure of a kind of double-temperature-sensing cut-off of the present invention includes a lid 10, a thermoinduction tripping device 20, a thermal cutout device 30, reaches a pedestal 40; Wherein,
This lid 10 is for electric conductor and connect a first terminal 11.
This thermoinduction tripping device 20 comprises a contact flat spring 21, a conductive connection part 22; This contact flat spring 21 is a rubber-like metal lamellar body, it forms the curved arc shape, can beat to the two side faces of lamellar body, can be out of shape back-flexing when contact flat spring 21 is heated and bounce to the another side, this contact flat spring 21 can be the composition metal thin slice, one end secure bond of contact flat spring 21 is in the inboard of aforementioned lid 30, and the free end group of contact flat spring 21 is established first conductiving point 211; This conductive connection part 22 generally is (probably being) en plaque, and its upper side is provided with one second conductiving point 221, and this second conductiving point 221 is corresponding to aforesaid first conductiving point 211.Conductive connection part 22 is provided with a gap slot 222, and other is provided with at least one combined hole 223.
This thermal cutout device 30 comprises an electric conductor 31, one meltable block 32; This electric conductor 31 generally is a flexible demihull shape, one end (left end) side extends at least two lugs 310,310 of this lugs form a clip slot 311, lug 310 fixedly contacts and electrical communication with the conductive connection part 22 of aforementioned hot induction tripping device 20, and the other end of electric conductor 31 is a free end 312; This meltable block 32 is resisted against aforementioned electric conductor 31, make the free end 312 of electric conductor 31 be contacted with one second terminal 34, formation is electrically connected, and electric conductor 31 is replaced by meltable block 32 and elastic force itself that electric conductor 31 is had free end 312 is separated with this second terminal 34; In addition, can with meltable block 32 not the electric conductor 31 side groups of homonymy establish an elastic component 33, this elastic component 32 is compressed and with the aforementioned electric conductor 31 of elastic-restoring force ejection, the elastic force that the free end 312 of increase electric conductor 31 separates with second terminal 34, in the present embodiment, this elastic component 33 is a helical spring.
This pedestal 40 is provided with one and is installed in groove 41, and this is installed in establishes a nose bar 42, a protuberance 43 in the groove 41, and pedestal 40 sides are established a clip slot 44.In addition be connected with a groove 45 being installed in groove 41 sides, establish a combination slot 46 at these groove 45 opposite side, the lateral opening of this combination slot 46 is less.
During assembling, with reference to figure 5, the gap slot 222 of this conductive connection part 22, the corresponding respectively pedestal 40 of combined hole 223 are installed in protuberance 43, the nose bar 42 of groove 41, in addition, this is installed in the protuberance 43 of groove 41 the clip slot 311 corresponding clampings that two lugs of electric conductor 31 are 310, make conductive connection part 22, electric conductor 31 embedding groups in being installed in groove 41, second terminal, 34 fixed clamp are in the clip slot 43 of pedestal 40, again meltable block 32 is embedded in the groove 45 of pedestal 40, by meltable block 32 ejection electric conductors 31, make the free end 312 of electric conductor 31 flexibly be contacted with second terminal 34.An end of an elastic component 33 capable of being combined is in the combination slot 46 of pedestal 40 in addition, make elastic component 33 other ends peak at the upside of electric conductor 31, the elastic component 33 of compression produces elastic-restoring forces and ejection electric conductor 31, uses the elastic force that the free end 312 of electric conductor 31 separates with second terminal 34.
The present invention is under general state, the bending that keeps down of the contact flat spring 21 of this thermoinduction tripping device 20, first conductiving point 211 of contact flat spring 21 and second conductiving point 221 of conductive connection part 22 are kept in touch, form electric current by the first terminal 11 circuit loop connection (ON) state, shown in Fig. 5,6 via lid 10, contact flat spring 21, first conductiving point 211, second conductiving point 221, conductive connection part 22, lug 310, electric conductor 31, free end 312 to second terminals 34.
At current overload, circuit is overheated or the ambient temperature used when too high, this thermoinduction tripping device 20 can produce temporary escape, outage (OFF), and after temperature descends, recovers to form circuit communication (ON) automatically; That is, the contact flat spring 21 of thermoinduction tripping device 20 is heated and is out of shape back-flexing (making progress) escape, and first conductiving point 211 is separated with second conductiving point 221, circuit is become open circuit (OFF) state, as shown in Figure 7.After contact flat spring 21 coolings of thermoinduction tripping device 20, be out of shape back-flexing (downwards) once again and beat, first conductiving point 211 is contacted with second conductiving point 221, make circuit become to be communicated with (ON) state, as shown in Figure 6.
Further, at current overload, circuit is overheated or ambient temperature when too high, if the contact flat spring 21 of this thermoinduction tripping device 20 is failed in real time or can't temperature distortion, back-flexing (making progress) escape and when cutting off the power supply (OFF), the meltable block 32 of this thermal cutout device 20 is promptly persistently overheating because of continuing to be heated, after arriving the temperature of setting, meltable block 32 fusions, be fragmented into remaining fragment 32 ', as shown in Figure 8, electric conductor 31 is able to the elastic force of itself, free end 312 is separated with second terminal 34, form outage fully (OFF) state of circuit loop.In the present embodiment, the elastic force ejection electric conductor 31 by an elastic component 32 forces free end 312 to separate with second terminal 34 in addition, guarantees outage fully (OFF) state of circuit loop, and can not revert to energising (ON) again.
The present invention is at current overload, when overheated the or ambient temperature of circuit is too high, first contact flat spring 21 temperature distortion back-flexing escapes by thermoinduction tripping device 20 cut off the power supply (OFF), when thermoinduction tripping device 20 reactionless, too late or the outage (OFF) repeatedly of reaction, when energising (ON) and temperature continue to rise, then further meltable block 32 fusions by thermal cutout device 30, cracked and make electric conductor 31 with itself elastic force or force ejection electric conductor 31 by elastic component 33, the free end 312 of electric conductor 31 is separated with second terminal 34, form the outage fully (OFF) of circuit loop, and circuit loop can not revert to energising (ON) state again.The present invention has two independently temperature-sensing cut-off settings, is a kind of circuit protection structure of double-temperature-sensing cut-off, can guarantee the effect of the outage fully (OFF) of circuit loop.
From the above mentioned, assembly structure of the present invention, action relationships, true tool practical effect, and be new design not seen before, have effect and progressive, so met the important document of Patent Law invention.
Below the present invention has been done a detailed description, only the above person only is preferred embodiment of the present invention, when not limiting scope of the invention process.Be that all equalizations of doing according to the present patent application scope change and modify etc., all should still belong in the patent covering scope of the present invention.
Claims (5)
1. the circuit protection structure of a double-temperature-sensing cut-off is characterized in that, includes a lid, a thermoinduction tripping device, a thermal cutout device, reaches a pedestal; Wherein,
This lid is for conductive material and connect a first terminal;
This thermoinduction tripping device comprises a contact flat spring, a conductive connection part; This contact flat spring is a rubber-like metal lamellar body, it forms the curved arc shape, can beat to the two side faces of lamellar body, can be out of shape back-flexing when contact flat spring is heated and bounces to the another side, one end secure bond of contact flat spring is in aforementioned lid, and the free end group of contact flat spring is established first conductiving point; This conductive connection part generally is an en plaque, and its upper side is provided with one second conductiving point, and this second conductiving point is corresponding to aforesaid first conductiving point;
This thermal cutout device comprises an electric conductor, a meltable block; Aforementioned electric conductor generally is a flexible demihull shape, and the one end fixedly contacts and electrical communication with the conductive connection part of aforementioned hot induction tripping device, and the other end of aforementioned electric conductor is a free end; This meltable block is resisted against aforementioned electric conductor, makes the free end of aforementioned electric conductor be contacted with one second terminal, and formation is electrically connected, and aforementioned electric conductor is replaced by meltable block and elastic force itself that aforementioned electric conductor is had free end is separated with this second terminal;
This pedestal is provided with one and is installed in groove; Aforesaid conductive connection part, electric conductor and meltable block embedding group are in being installed in groove;
At general state, first conductiving point and second conductiving point of the contact flat spring of this thermoinduction tripping device keep in touch, and form the circuit loop connected state; At current overload, circuit is overheated or the ambient temperature used when too high, the contact flat spring of this thermoinduction tripping device is heated and is out of shape the back-flexing escape, first conductiving point is separated with second conductiving point, make circuit become off state, and after the contact flat spring cooling, be out of shape back-flexing once again and beat, first conductiving point contacts with second conductiving point, forms the connected state again of circuit;
Further, at current overload, circuit is overheated or the ambient temperature used is crossed under the high state, if this thermoinduction tripping device is failed in real time or can't escape and when cutting off the power supply, the meltable block of this thermal cutout device promptly continues because of continuing to be heated to heat up, after arriving the temperature of setting, meltable block fusion, cracked, electric conductor makes free end separate with second terminal with the elastic force of itself, forms the complete off-position of circuit loop.
2. the circuit protection structure of double-temperature-sensing cut-off as claimed in claim 1 is characterized in that, the contact flat spring of this thermoinduction tripping device is the composition metal thin slice.
3. the circuit protection structure of double-temperature-sensing cut-off as claimed in claim 1 is characterized in that, further:
At this thermal cutout device one elastic component is set;
This pedestal is established a combination slot;
One end of this elastic component is embedded in the combination slot of this pedestal, and elastic component is compressed and is resisted against this electric conductor with the other end, by the aforementioned electric conductor of elastic-restoring force ejection, increases the elastic force that the free end of aforementioned electric conductor separates with second terminal.
4. the circuit protection structure of double-temperature-sensing cut-off as claimed in claim 3 is characterized in that, the elastic component of this thermal cutout device is a helical spring.
5. the circuit protection structure of double-temperature-sensing cut-off as claimed in claim 1 is characterized in that, this pedestal side is established a clip slot, and this second terminal fixed clamp is in the clip slot of pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101663904A CN101685722B (en) | 2008-09-26 | 2008-09-26 | Double temperature-sensing power-off circuit protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101663904A CN101685722B (en) | 2008-09-26 | 2008-09-26 | Double temperature-sensing power-off circuit protection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101685722A CN101685722A (en) | 2010-03-31 |
| CN101685722B true CN101685722B (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101663904A Expired - Fee Related CN101685722B (en) | 2008-09-26 | 2008-09-26 | Double temperature-sensing power-off circuit protection structure |
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| CN (1) | CN101685722B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010038070B4 (en) * | 2010-08-06 | 2012-10-11 | Phoenix Contact Gmbh & Co. Kg | Thermal overload protection device |
| IT1401780B1 (en) * | 2010-09-22 | 2013-08-28 | Thermowatt Spa | ELECTRONIC THERMOSTAT WITH SAFETY ACTIVATED BY RESISTORS. |
| US9455106B2 (en) * | 2011-02-02 | 2016-09-27 | Littelfuse, Inc. | Three-function reflowable circuit protection device |
| CN109659479A (en) * | 2019-01-04 | 2019-04-19 | 无锡至极动能科技有限公司 | A kind of flexible arm fusing function cell connector |
| CN113116630A (en) * | 2021-04-19 | 2021-07-16 | 高铎 | Traditional chinese and western medicine combines internal medicine massage area |
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2008
- 2008-09-26 CN CN2008101663904A patent/CN101685722B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-288649A 1999.10.19 |
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| CN101685722A (en) | 2010-03-31 |
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