CN101685723B - Circuit protection structure with double temperature induction switching-off - Google Patents

Circuit protection structure with double temperature induction switching-off Download PDF

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Publication number
CN101685723B
CN101685723B CN2008102113780A CN200810211378A CN101685723B CN 101685723 B CN101685723 B CN 101685723B CN 2008102113780 A CN2008102113780 A CN 2008102113780A CN 200810211378 A CN200810211378 A CN 200810211378A CN 101685723 B CN101685723 B CN 101685723B
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circuit
temperature
flat spring
contact flat
conductiving point
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Expired - Fee Related
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CN2008102113780A
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CN101685723A (en
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游聪谋
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游聪谋
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Abstract

The invention discloses a circuit protection structure with double temperature induction switching-off, which comprises a cover body, a thermal induction trip device, a thermal fusion switching-off device and a seat body. Two temperature induction switching-off devices which run independently are arranged between the two terminals of a circuit loop. At the time of current overload, circuit overheating or overhigh environmental temperature, a contact spring piece of the thermal induction trip device is heated, deformed, bent in a reverse direction, tripped and switched off (OFF); at the time of the current overload, the circuit overheating or the overhigh environmental temperature, the fusible alloy of the thermal fusion switching-off device is fused and ruptured when no reaction, an incomplete reaction or repeated OFF and ON occur in the thermal induction trip device and the temperature of the circuit loop is continuously risen, and the complete OFF of the circuit loop is ensured. The two independent temperature induction switching-off devices have double temperature induction switching-off effects and ensure the aim of safe power utilization.

Description

The circuit protection structure of double-temperature-sensing cut-off
Technical field
The present invention relates to a kind of circuit protection structure, relate in particular to a kind of circuit protection structure of double-temperature-sensing cut-off.
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 or the circuit breaker in integrated circuit loop when current overload 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 outside the overheated automatic escape of current overload, cut-off structure of fuse, circuit breaker and switch; The single electronics of part, electric equipment products, for example: the electric heating appliance that the information equipment of higher-priced electronic product, deal with data or power consumption are higher etc. also distinctly are provided with the circuit protection structure of temperature-sensing cut-off device; With this single electronics of protection, electric equipment products; In the own current overload of this single electronics, electric equipment products, when circuit is overheated, respond in real time and cut off the power supply, avoid burning product itself; Can avoid simultaneously causing each other circuit loop, the current overload in integrated circuit loop, overheating conditions, the problem that causes other power consumption equipment in circuit loop, the integrated circuit loop to operate because of the problem of single electronics, electric equipment products.
Be used in the existing temperature-sensing cut-off protector of single electronic product; As depicted in figs. 1 and 2, it is provided with a contact flat spring 101 in circuit, and this contact flat spring 101 is made as bending; Bounce in being heated back distortion and back-flexing; One end fixation group of contact flat spring is located at the first terminal 102, and the other end of contact flat spring 101 is a free end, and 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 fixation group in addition; During enforcement, it is crooked to the direction of second terminal 104 that contact flat spring 101 keeps, and 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 is as shown in Figure 1; When current overload; Contact flat spring 101 temperature distortions and back-flexing and bounce were opened contact flat spring 101 free-ended first conductiving points 103 and second conductiving point in 105 minutes, became the state of circuitry cuts (OFF); As shown in Figure 2, can guarantee that the circuit of electronic product own avoids burning.Yet 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 be because of switch on, cut off the power supply repeatedly, causes electric current unstable, and cause when machine or can't normal operation, shortens useful life, even infringement fully.
Summary of the invention
The invention reside in and solve existing temperature-sensing cut-off protector only to have one be the escape breaker device of temperature sense with the contact flat spring; Can't effectively set the temperature sensor value of 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, and circuit produces spark or switches on repeatedly, cuts off the power supply, and causes electric current unstable; Send a telegraph sub-product when machine or can't normal operation, shorten useful life the variety of issue of infringement fully even.
In order to address the above problem, the invention provides a kind of circuit protection structure of double-temperature-sensing cut-off, include a lid, a thermoinduction tripping device, a thermal cutout device, reach a pedestal;
This lid is for electric conducting material is processed and connected 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 is 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 to another side spring, an end secure bond of contact flat spring is in the inboard of aforementioned lid, the free end group of contact flat spring is established first conductiving point; This conductive connection part 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, an elastic component and two fusible alloys; One side of this electric conductor is fixedly connected on aforementioned conductive connection part with first fusible alloy, and the opposite side of electric conductor is fixedly connected one second terminal with second fusible alloy; This elastic component is resisted against electric conductor, and the elastic component compression produces an elastic-restoring force;
This pedestal is provided with one and is installed in groove; Aforesaid conductive connection part, electric conductor and elastic component embedding group are in being installed in groove;
First conductiving point and second conductiving point of the contact flat spring of said thermoinduction tripping device keep in touch, and form circuit loop and are communicated with (ON) state; In 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, and first conductiving point is separated with second conductiving point, circuit is become open circuit (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 connection again (ON) state of circuit;
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 (OFF), first of this thermal cutout device; Second fusible alloy heats up because of continuing to be heated; After arriving the temperature of setting, the first, the second fusible alloy fusion fracture; Electric conductor is separated with second terminal with the elastic force ejection by elastic component, forms outage fully (OFF) state of circuit loop.
The contact flat spring of this thermoinduction tripping device is the composition metal thin slice.
The side of the conductive connection part of this thermoinduction tripping device is bent to form side plate;
One side of the electric conductor of this thermal cutout device is fixedly connected on the side plate of aforementioned conductive connection part with first fusible alloy.
The elastic component of this thermal cutout device is a helical spring.
Elastic component one end of this thermal cutout device peaks at and is installed in the groove sidewall.
This pedestal side is established a clip slot, and this second terminal fixed clamp is in the clip slot of pedestal.
The side of this lid is established at least one vent openings.
The invention has the beneficial effects as follows to have two independently temperature sense trippers, when current overload or circuit are overheated, can independent separately temperature sensor, circuit loop is cut off the power supply (OFF) fully, have the dual temperature sense effect that opens circuit, guarantee Electrical Safety.
When current overload, circuit is overheated or ambient temperature when too high, earlier by the contact flat spring temperature distortion back-flexing escape of thermoinduction tripping device cut off the power supply (OFF), need not to utilize the fusible alloy of thermal cutout device to rupture and reach circuit loop outage (OFF); Getting rid of circuit loop overload factor, after the contact flat spring of thermoinduction tripping device cools, can be returned to the state of energising (ON), the still sustainable use of circuit protection structure need not new clothes one circuit brake, saves time and reduces user's expenditure.
When current overload or circuit overheated; And the thermoinduction tripping device is reactionless, reaction not as good as or outage (OFF) repeatedly, when energising (ON) and temperature continue to rise; Then, when fusible alloy arrives the design temperature critical value, rupture, make circuit loop open circuit fully (OFF) further by the fusible alloy of the thermal cutout device characteristic persistently overheating, the fusion fracture that is bound to that is bound to of being heated; Guarantee safety utilization of electric power, and the functional characteristic of the various electrical appliances in the protective circuit loop.
Description of drawings
Fig. 1 is the assembled sectional view of temperature-sensing cut-off protector of the prior art, and it shows conducting (ON) state of this protector.
The assembled sectional view of Fig. 2 temperature-sensing cut-off protector of the prior art, it shows escape outage (OFF) state of this protector.
Fig. 3 is the three-dimensional exploded view of the circuit protection structure of double-temperature-sensing cut-off in the embodiment of the invention.
Fig. 4 is the circuit protection structure three-dimensional combination figure of double-temperature-sensing cut-off in the embodiment of the invention.
Fig. 5 is the schematic top plan view that the circuit protection structure of double-temperature-sensing cut-off in the embodiment of the invention does not add lid, shows circuit protection structure conducting (ON) state of double-temperature-sensing cut-off.
Fig. 6 is the circuit protection structure assembled sectional view of double-temperature-sensing cut-off in the embodiment of the invention, shows circuit protection structure conducting (ON) state of double-temperature-sensing cut-off.
Fig. 7 is the circuit protection structure assembled sectional view of double-temperature-sensing cut-off in the embodiment of the invention, shows the escape outage (OFF) of the circuit protection structure general state of embodiment of the invention double-temperature-sensing cut-off.
Fig. 8 does not add the schematic top plan view of lid for the circuit protection structure of double-temperature-sensing cut-off in the embodiment of the invention; The circuit protection structure that shows double-temperature-sensing cut-off is when current overload; The thermoinduction tripping device is timely escape or can't the escape outage time; The first, the second fusible alloy of thermal cutout device is heated and fusion fracture, forms circuit loop cut off the power supply fully (OFF).
Fig. 9 is the circuit protection structure three-dimensional combination figure of double-temperature-sensing cut-off in the second embodiment of the invention.
Embodiment
For disclosing the object of the invention, characteristic and effect in detail, by following preferable specific embodiment, cooperate appended graphicly, the present invention is done one specify as the back:
Like Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6 is respectively three-dimensional exploded view, the three-dimensional combination figure of the circuit protection structure of double-temperature-sensing cut-off in the embodiment of the invention, the schematic top plan view that does not add lid, assembled sectional view.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, an and pedestal 40; Wherein, this lid 10 is processed for electric conducting material and is connected 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 to another side spring, 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 is an en plaque generally, and its upper side is provided with one second conductiving point 221, and is provided with a combined hole 223, and this second conductiving point 221 is corresponding to aforesaid first conductiving point 211, and the side of conductive connection part 22 is bent to form side plate 222.
This thermal cutout device 30 comprises an electric conductor 31, an elastic component 32 and the first, the second fusible alloy 33,33 '; This electric conductor 31 generally is plates, and one of which side (left side) is fixedly connected on the side plate 222 of aforementioned conductive connection part 22 with first fusible alloy 33, and the opposite side of electric conductor 31 (right side) is fixedly connected one second terminal 34 with second fusible alloy 33 '; This elastic component 32 is resisted against electric conductor 31, and elastic component 32 is compressed and produces an elastic-restoring force, in order to ejection electric conductor 31.In the present embodiment, this elastic component 32 is a helical spring.
This pedestal 40 is provided with one and is installed in groove 41, and this is installed in groove 41 and establishes a nose bar 42, and pedestal 40 sides are established a clip slot 43.
During assembling, the combined hole 123 corresponding pedestals 40 of conductive connection part 12 are installed in the nose bar 42 in the groove 41, make conductive connection part 22, electric conductor 31 and elastic component 32 embedding groups in being installed in groove 41, and second terminal, 34 fixed clamp are in the clip slot 43 of pedestal 40; Because elastic component 32 1 ends peak at and are installed in groove 41 sidewalls, compressed elastic component 32 produces an elastic-restoring force and ejection electric conductor 31.
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 and be communicated with (ON) state via lid 10, contact flat spring 21, first conductiving point 211, second conductiving point 221, conductive connection part 22, first fusible alloy 33, electric conductor 31, second fusible alloy 33 ' to the circuit loop of second terminal 34, like Fig. 5 and shown in Figure 6 by the first terminal 11.
When 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, automatically replies and form circuit communication (ON); 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, and is 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, with reference to shown in Figure 6.
Further, when 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 first, the second fusible alloy 33,33 ' of this thermal cutout device 30 promptly heats up because of continuing to be heated, after the temperature that arrival is set; First; Second fusible alloy 33,33 ' fusion fracture, electric conductor 31 is separated with second terminal 34 with the elastic force ejection by elastic component 32, and is as shown in Figure 8; Form outage fully (OFF) state of circuit loop, and can not revert back to energising (ON) again.
In addition with reference to figure 9; Be the embodiment of the invention two; Wherein the side of this lid 10 is established at least one vent openings 12, is communicated with the air-flow of surrounding environment by this vent openings 12, can make the temperature sense effect of thermoinduction tripping device 20 and thermal cutout device 30 in the lid 10 more direct.
The present invention at current overload, circuit is overheated or ambient temperature when too high; Earlier by the contact flat spring 21 temperature distortion back-flexing escapes of thermoinduction tripping device 20 cut off the power supply (OFF);, reaction 20 reactionless when the thermoinduction tripping device not as good as or outage (OFF) repeatedly, energising (ON) and temperature when continuing to rise; Then further by first of thermal cutout device 30; Second fusible alloy 33,33 ' fusion fracture and electric conductor 31 is separated with second terminal 34 form the outage fully (OFF) of circuit loop, and circuit loop can not revert back 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.
The above is merely preferred embodiment of the present invention, when not limiting the scope that the present invention implements.Be that all equalizations of doing according to application range of the present invention change and modify etc., all should still belong in the patent covering scope of the present invention.

Claims (6)

1. the circuit protection structure of a double-temperature-sensing cut-off includes a lid, a thermoinduction tripping device, a thermal cutout device, reaches a pedestal; It is characterized in that,
This lid is for electric conducting material is processed and connected 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 be out of shape back-flexing when contact flat spring is heated and to another side spring, an end secure bond of contact flat spring is in the inboard of aforementioned lid, 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, an elastic component and two fusible alloys; One side of this electric conductor is fixedly connected on aforementioned conductive connection part with first fusible alloy, and the opposite side of electric conductor is fixedly connected one second terminal with second fusible alloy; This elastic component is resisted against electric conductor, and the elastic component compression produces an elastic-restoring force;
This pedestal is provided with one and is installed in groove; Aforesaid conductive connection part, electric conductor and elastic component embedding group are in being installed in groove;
First conductiving point and second conductiving point of the contact flat spring of said thermoinduction tripping device keep in touch, and form the circuit loop connected state; In 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, and first conductiving point is separated with second conductiving point, makes 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; Two fusible alloys of this thermal cutout device heat up because of continuing to be heated; After arriving the temperature of setting, the first, the second fusible alloy fusion fracture; Electric conductor is separated with second terminal with the elastic force ejection by elastic component, 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, the elastic component of this thermal cutout device is a helical spring.
4. the circuit protection structure of double-temperature-sensing cut-off as claimed in claim 1 is characterized in that, elastic component one end of this thermal cutout device peaks at and is installed in the groove sidewall.
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.
6. the circuit protection structure of double-temperature-sensing cut-off as claimed in claim 1 is characterized in that, the side of this lid is established at least one vent openings.
CN2008102113780A 2008-09-24 2008-09-24 Circuit protection structure with double temperature induction switching-off Expired - Fee Related CN101685723B (en)

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CN101685723B true CN101685723B (en) 2012-04-18

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120194958A1 (en) * 2011-02-02 2012-08-02 Matthiesen Martyn A Three-Function Reflowable Circuit Protection Device
CN106449321A (en) * 2016-10-17 2017-02-22 广西新全通电子技术有限公司 Insulation shielded small surge protection device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2290169A (en) * 1994-06-10 1995-12-13 Uchiya Thermostat Double safety thermostat
EP0938116A2 (en) * 1998-02-23 1999-08-25 Marcel Hofsäss Switch
CN1282089A (en) * 1999-07-22 2001-01-31 打矢恒温器株式会社 Heat Protector
CN1747098A (en) * 2004-09-07 2006-03-15 游聪谋 Protector of inductive circuit with dual-temperature
CN1848581A (en) * 2005-04-14 2006-10-18 游聪谋 Double-temperature-sensing cut-off circuit protector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2290169A (en) * 1994-06-10 1995-12-13 Uchiya Thermostat Double safety thermostat
EP0938116A2 (en) * 1998-02-23 1999-08-25 Marcel Hofsäss Switch
CN1282089A (en) * 1999-07-22 2001-01-31 打矢恒温器株式会社 Heat Protector
CN1747098A (en) * 2004-09-07 2006-03-15 游聪谋 Protector of inductive circuit with dual-temperature
CN1848581A (en) * 2005-04-14 2006-10-18 游聪谋 Double-temperature-sensing cut-off circuit protector

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