CN202905645U - Temperature sensing type temperature fuse provided with contacts - Google Patents

Temperature sensing type temperature fuse provided with contacts Download PDF

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Publication number
CN202905645U
CN202905645U CN 201220601084 CN201220601084U CN202905645U CN 202905645 U CN202905645 U CN 202905645U CN 201220601084 CN201220601084 CN 201220601084 CN 201220601084 U CN201220601084 U CN 201220601084U CN 202905645 U CN202905645 U CN 202905645U
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CN
China
Prior art keywords
metal
contact
metal terminal
shell
temperature sensor
Prior art date
Application number
CN 201220601084
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Chinese (zh)
Inventor
许由生
江鸿盛
徐忠厚
Original Assignee
厦门赛尔特电子有限公司
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Priority to CN 201220601084 priority Critical patent/CN202905645U/en
Application granted granted Critical
Publication of CN202905645U publication Critical patent/CN202905645U/en

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Abstract

The utility model discloses a temperature sensing type temperature fuse provided with contacts, which comprises an insulating shell, a first metal terminal, a second metal terminal, a temperature sensing body and an elastic element, wherein the first metal terminal is provided with a moving contact, the second metal terminal is provided with a static contact, the first metal terminal and the second metal terminal are installed in the insulating shell, the moving contact and the static contact are located in the insulating shell and oppositely arranged to be a contact or separated state, and the first metal terminal and the second metal terminal extend outside the insulating shell so as to form electrode ends of a connecting circuit; the temperature sensing body is accommodated in the insulating shell; and in the insulating shell, the first metal terminal is abutted against the temperature sensing body through the elastic element so as to enable the moving contact of the first metal terminal and the static contact of the second metal terminal to be at a normally open or normally closed state. The temperature sensing type temperature fuse disclosed by the utility model adopts a pair of electric contacts, has the capacity of resisting high surge current, and effectively overcomes the defects that a welded phenomenon or malfunction or the like occurs easily in a temperature fuse in the prior art under surge current.

Description

A kind of temperature sensitive type Thermal Cutoffs of contact-carrying
Technical field
The utility model relates to a kind of Thermal Cutoffs, particularly relate to a kind of have Chinese People's Anti-Japanese Military and Political College's surge current ability the temperature sensitive type Thermal Cutoffs of contact-carrying.
Background technology
Often need to install temperature or current control device in household electrical appliance and the industrial equipment to realize design function in advance.In addition, in order to ensure safety, also can in the circuit of electrical equipment and equipment, access overcurrent or over-temperature protection device.
At present, the disposable Thermal Cutoffs product that is usually used in overheat protector roughly is divided into two classes.The first adopts the low-melting alloy silk as the alloy-type temperature fuse of temperature-sensing element; when the temperature of protected device reaches the B alloy wire melting temperature; the alloy of fusing cuts off circuit in surface tension and under the active force of the disconnected agent of fluxing thereby shrink balling-up to the two pins direction on every side.This class alloy-type temperature fuse product belongs to non-contact structure, because there is certain resistance in B alloy wire self, therefore can't carry larger electric current under certain volume conditions.Second it is to adopt organic substance material compression molding as thermal sensitive piece, withstand thick stage clip by this thermal sensitive piece, the elastic force that sees through thick stage clip contacts eight calvus with the lead-in wire electrode of contact-carrying, form the single contact conductive structure, organic substance fusable links fusing when ambient temperature reaches predetermined temperature, another thin stage clip will separate the lead-in wire of eight calvus with contact-carrying, thereby with circuitry cuts.Because this organic substance type Thermal Cutoffs belongs to the single contact structure, and how its contact directly taken the lead by copper cash, and the electrical contact area is very little, causes contact resistance larger; In addition, also have contact resistance between its eight calvus and the metal shell, so the contact resistance of the organic substance type Thermal Cutoffs of prior art is larger.
As everyone knows, because the existence of occurring in nature thunderbolt causes unavoidably can producing induction lightening in the circuit, the simultaneously startup of big-and-middle-sized equipment and stop to carry out the switching motion of switch, the switching overvoltage that produces has also been brought surge current to circuit.The caused surge current of these induction lightenings and switching overvoltage all can be flowed through with the organic substance type Thermal Cutoffs of contact resistance; make it that phenomenon of resistance welded probably occur; when the resistance welded phenomenon occurs when; eight calvus of organic substance type Thermal Cutoffs and contact electrode be permanent welding, thereby make it lose the defencive function of Thermal Cutoffs.
For alloy-type temperature fuse, when it is in hot environment lower time for a long time, its disconnected agent of fluxing is easy to wear out, thereby makes it lose the defencive function of Thermal Cutoffs.Thereby the alloy-type temperature fuse of prior art exists the disconnected agent of fluxing aging easily, causes the defective that lost efficacy.
The utility model content
The purpose of this utility model is to overcome the deficiency of prior art; a kind of temperature sensitive type Thermal Cutoffs of contact-carrying is provided; it adopts a pair of electrical contact; ability with anti-high surge current; there is not the problem of ageing failure yet, can be applicable in household electrical appliance, the industrial equipment etc. as thermel protection device.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of temperature sensitive type Thermal Cutoffs of contact-carrying, comprise insulation shell, the first metal end, the second metal terminal, temperature sensor and flexible member, the first metal end is provided with moving contact, the second metal terminal is provided with fixed contact, the first metal end and the second metal terminal are installed on respectively insulation shell, the fixed contact of the moving contact of this first metal end and the second metal terminal lays respectively in the insulation shell, and arrange in opposite directions, the first metal end and the second metal terminal extend respectively outside the insulation shell, form the electrode tip of connecting circuit; Temperature sensor is contained in the insulation shell; In insulation shell, the first metal end is resisted against temperature sensor by flexible member, makes the fixed contact of its moving contact and the second metal terminal be Chang Kai or normally off.
Described insulation shell comprises shell and the cover plate with upper shed, the wherein a pair of relative sidewall of shell is respectively equipped with the grooving that supplies described the first metal end each other end and the second metal terminal to stretch out, and each other end of described the first metal end and the second metal terminal extends outside the shell from this two relative sidewall sealing of shell by the grooving of correspondence respectively; Described temperature sensor is resisted against between the side of the wherein sidewall of all the other two sides of shell and described the first metal end, and described flexible member is opened between the opposite side of another sidewalls of all the other two sides that peak at shell and the first metal end; Cover plate seals the upper shed of shell.
The wherein medial surface of a sidewall of all the other two sides of described shell is provided with the first stopper slot, and described temperature sensor is limited in this first stopper slot; The medial surface of another sidewall of all the other two sides of described shell is provided with the second stopper slot, and an end of described flexible member is resisted against in this second stopper slot.
The fixed contact of described the second metal terminal and described flexible member are positioned at the same side of described the first metal end, described moving contact and described fixed contact are contact condition, and described the first metal end is subjected to the flexible member effect that its moving contact and the fixed contact of the second metal terminal are separated mutually when described temperature sensor fusing.
The fixed contact of described the second metal terminal and described flexible member are positioned at the not homonymy of described the first metal end, described moving contact and described fixed contact are separated position, and described the first metal end is subjected to the flexible member effect that its moving contact is contacted with the fixed contact of the second metal terminal when described temperature sensor fusing.
Described temperature sensor is the organic substance material.
Described temperature sensor is low-melting point metal alloy.
Described the first metal end and the second metal terminal are respectively reed structure.
Described flexible member is stage clip.
Described insulation shell is ceramic material or plastic material.
The temperature sensitive type Thermal Cutoffs of a kind of contact-carrying of the present utility model, the fixed contact of the moving contact of its first metal end and the second metal terminal consists of a pair of electrical contact.In the normal temperature situation, the moving contact of its first metal end and the state that the fixed contact maintenance of the second metal terminal contacts or separates mutually make circuit keep the state of conducting or situation; When its ambient temperature reaches the fusing point of temperature sensor; the fusing of this temperature sensor swings an end of the first metal end under the elastic force effect of flexible member, and drives its moving contact and separate mutually with the fixed contact of the second metal terminal or contact; thereby disconnect or the connection circuit, realize defencive function.
Compared with prior art, the beneficial effects of the utility model are:
1, owing to adopts a pair of electrical contact (moving contact and fixed contact) as the execution unit of connecting and disconnecting of the circuit action, and adopt flexible member to cooperate temperature sensor that the responsiveness of the moving contact of the first metal end is controlled, so that the contact resistance between its electrical contact of the utility model one side is less, and there is not other contact resistance, thereby the utlity model has the ability of anti-high surge current, thereby the organic substance type Thermal Cutoffs that has effectively overcome prior art is because of the large weak point that is welded easily phenomenon under surge current of contact resistance; On the other hand, the utility model adopts said structure also to have stronger contact breaking capacity, misoperation can not occur;
2, after the utility model adopts said structure, when its temperature sensor is low-melting point metal alloy, need not to adopt the disconnected agent of fluxing, thereby do not have the problem that disconnected agent is aging, protection was lost efficacy of fluxing;
3, the utility model both can be made the open type Thermal Cutoffs, also can make the closed type Thermal Cutoffs, thereby its application is more extensive, can select for having the different circuit that require;
4, insulation shell of the present utility model is as a kind of preferred employing ceramic material, have volume little, firm in structure, can directly be close to heating position, the characteristics such as easy for installation.
Below in conjunction with drawings and Examples the utility model is described in further detail; But the temperature sensitive type Thermal Cutoffs of a kind of contact-carrying of the present utility model is not limited to embodiment.
Description of drawings
Fig. 1 is embodiment one exploded perspective view of the present utility model;
Fig. 2 is embodiment one profile of the present utility model;
Fig. 3 is embodiment two exploded perspective views of the present utility model;
Fig. 4 is embodiment two profiles of the present utility model.
Embodiment
Embodiment one:
See also Fig. 1, shown in Figure 2, the temperature sensitive type Thermal Cutoffs of a kind of contact-carrying of the present utility model, it is the closed type Thermal Cutoffs, namely under normal temperature conditions, under this Thermal Cutoffs effect, circuit is in on-state, that is following moving contact 31 and fixed contact 41 are in the state of close contact under normal temperature conditions.It comprises insulation shell, the first metal end 3, the second metal terminal 4, temperature sensor 5 and flexible member.The first metal end the 3 and second metal terminal 4 is born respectively conduction, heat conduction function, each adopts the copper sheet of flat to be made, has reed structure, the first metal end 3 can move, join by V character form structure 32 one between the part that the one end the is corresponding part corresponding with its other end, the second metal terminal 4 remains static, and is the zigzag structure, this the first metal end 3 can be called the moving electrode reed again, and the second metal terminal 4 can be called the stationary electrode reed again.One distolateral wall riveted joint of this first metal end 3 has moving contact 31, one distolateral wall riveted joint of the second metal terminal 4 has fixed contact 41, this moving contact 31 is smooth with the contact-making surface of fixed contact 41, thereby both contacts area are larger, moving contact 31 adopts respectively low resistivity materials (for example Kufil material) to make with fixed contact 41 again, thereby the contact resistance between this moving contact 31 and the fixed contact 41 is very little.The first metal end the 3 and second metal terminal 4 is installed on respectively insulation shell, each end of this first metal end the 3 and second metal terminal 4 lays respectively in the insulation shell, and moving contact 31 is arranged to contact condition in opposite directions with fixed contact 41, each other end of the first metal end the 3 and second metal terminal 4 then extends respectively outside the insulation shell, forms the electrode tip of connecting circuit.Temperature sensor 5 adopts the organic substance materials to be pressed into block structure (certainly, this temperature sensor 5 also can adopt to have low-melting metal alloy compositions and make), and this temperature sensor 5 is contained in the insulation shell; Flexible member preferably adopts stage clip 6, the part that the first metal end 3 is positioned at insulation shell is resisted against temperature sensor 5 by stage clip 6, so that the first metal end 3 is subjected to the precompression effect of stage clip 5 that its moving contact 31 and the fixed contact 41 of the second metal terminal are separated mutually when temperature sensor 5 fusing.
As a kind of preferred, above-mentioned insulation shell adopts ceramic material to make (certainly, this insulation shell also can adopt engineering plastics to make), this insulation shell comprises shell 1 and the cover plate 2 with upper shed, the wherein a pair of relative sidewall of shell 1 is respectively equipped with the grooving 11 that each other end for the first metal end the 3 and second metal terminal 4 stretches out, and each other end of the first metal end 3 and the second metal terminal 4 the respectively grooving 11 by correspondence extends outside the shell 1 from this two relative sidewall of shell 1.Above-mentioned temperature sensor 5 is resisted against between the side of the wherein sidewall of all the other two sides of shell 1 and the first metal end 3, and concrete, the medial surface of this sidewall of shell 1 is provided with the first stopper slot 12, and temperature sensor 5 namely is limited in this first stopper slot 12; 6 of stage clips peak between the opposite side of another sidewall of all the other two sides of shell 1 and the first metal end 3, specifically, the medial surface of this sidewall of shell 1 is provided with the second stopper slot 13, and an end of stage clip 6 namely is resisted against (other end of stage clip 6 supports to the first metal end 3) in this second stopper slot 13; Cover plate 2 is used for shutoff is carried out in the upper shed of shell 1.After the first metal end 3, the second metal terminal 4, temperature sensor 5 and stage clip 6 are installed on shell 1, adopt between 7 pairs of cover plates 2 of epoxy resin and the shell 1, and the both sides of shell 1 seal.
Fixed contact 41 and the stage clip 6 of above-mentioned the second metal terminal is positioned at the same side of the first metal end 3, in normal temperature range, and fixed contact 41 close contacts of the moving contact 31 of the first metal end and the second metal terminal.
The temperature sensitive type Thermal Cutoffs of a kind of contact-carrying of the present utility model, its temperature sensor 5 plays a part to support the moving contact 31 of the first metal end and fixed contact 41 close contacts of the second metal terminal, like this, the moving contact 31 of two close contacts and fixed contact 41 are being born the effect that electric current circulates between two metal terminals.When ambient temperature surpasses the fusing point of temperature sensor 5, temperature sensor 5 is fused into liquid state and the first metal end 3 is lost support force, stage clip 6 discharges its elastic force and the first metal end 3 is pushed open simultaneously, and the second metal terminal 3 of swing drives the fixed contact 41 that its moving contact 31 leaves the second metal terminal.At this moment, two contacts (being moving contact 31 and fixed contact 41) transfer normally open to by normally off, make circuit be in off-state.
Embodiment two:
See also Fig. 3, shown in Figure 4, the temperature sensitive type Thermal Cutoffs of a kind of contact-carrying of the present utility model, the difference of itself and embodiment one is: it is the open type Thermal Cutoffs, be the not homonymy that its second metal terminal 4 and stage clip 6 are in the first metal end 3, the moving contact 31 of the first metal end and the fixed contact 41 of the second metal terminal are separated from each other under normal temperature.
The temperature sensitive type Thermal Cutoffs of a kind of contact-carrying of the present utility model, its temperature sensor 5 supports the first metal end 3 equally, and the moving contact 31 that makes the first metal end and the fixed contact 41 of the second metal terminal keep the state that separates mutually under normal circumstances.When ambient temperature surpasses the fusing point of temperature sensor 5, temperature sensor 5 is fused into liquid state and the first metal end 3 is lost support force, simultaneously stage clip 6 discharges its elastic force and pushes the part at an end place of the first metal end 3 to second metal terminal 4, make the moving contact 31 of the first metal end and fixed contact 41 close contacts of the second metal terminal, and under the elastic force effect of stage clip 6, keep the state of close contact.At this moment, two contacts (being moving contact 31 and fixed contact 41) transfer normally off to by normally open, make circuit be in on-state.
Above-described embodiment only is used for further specifying the temperature sensitive type Thermal Cutoffs of a kind of contact-carrying of the present utility model; but the utility model is not limited to embodiment; every foundation technical spirit of the present utility model all falls in the protection range of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does.

Claims (10)

1. the temperature sensitive type Thermal Cutoffs of a contact-carrying, it is characterized in that: comprise insulation shell, the first metal end, the second metal terminal, temperature sensor and flexible member, the first metal end is provided with moving contact, the second metal terminal is provided with fixed contact, the first metal end and the second metal terminal are installed on respectively insulation shell, the fixed contact of the moving contact of this first metal end and the second metal terminal lays respectively in the insulation shell, and arrange in opposite directions, the first metal end and the second metal terminal extend respectively outside the insulation shell, form the electrode tip of connecting circuit; Temperature sensor is contained in the insulation shell; In insulation shell, the first metal end is resisted against temperature sensor by flexible member, makes the fixed contact of its moving contact and the second metal terminal be Chang Kai or normally off.
2. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1, it is characterized in that: described insulation shell comprises shell and the cover plate with upper shed, the wherein a pair of relative sidewall of shell is respectively equipped with the grooving that supplies described the first metal end each other end and the second metal terminal to stretch out, and each other end of described the first metal end and the second metal terminal extends outside the shell from this two relative sidewall sealing of shell by the grooving of correspondence respectively; Described temperature sensor is resisted against between the side of the wherein sidewall of all the other two sides of shell and described the first metal end, and described flexible member is opened between the opposite side of another sidewalls of all the other two sides that peak at shell and the first metal end; Cover plate seals the upper shed of shell.
3. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 2, it is characterized in that: the wherein medial surface of a sidewall of all the other two sides of described shell is provided with the first stopper slot, and described temperature sensor is limited in this first stopper slot; The medial surface of another sidewall of all the other two sides of described shell is provided with the second stopper slot, and an end of described flexible member is resisted against in this second stopper slot.
4. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1 and 2, it is characterized in that: the fixed contact of described the second metal terminal and described flexible member are positioned at the same side of described the first metal end, described moving contact and described fixed contact are contact condition, and described the first metal end is subjected to the flexible member effect that its moving contact and the fixed contact of the second metal terminal are separated mutually when described temperature sensor fusing.
5. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1 and 2, it is characterized in that: the fixed contact of described the second metal terminal and described flexible member are positioned at the not homonymy of described the first metal end, described moving contact and described fixed contact are separated position, and described the first metal end is subjected to the flexible member effect that its moving contact is contacted with the fixed contact of the second metal terminal when described temperature sensor fusing.
6. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1, it is characterized in that: described temperature sensor is the organic substance material.
7. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1, it is characterized in that: described temperature sensor is low-melting point metal alloy.
8. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1 is characterized in that: described the first metal end and the second metal terminal are respectively reed structure.
9. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1, it is characterized in that: described flexible member is stage clip.
10. the temperature sensitive type Thermal Cutoffs of contact-carrying according to claim 1, it is characterized in that: described insulation shell is ceramic material or plastic material.
CN 201220601084 2012-11-14 2012-11-14 Temperature sensing type temperature fuse provided with contacts CN202905645U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220601084 CN202905645U (en) 2012-11-14 2012-11-14 Temperature sensing type temperature fuse provided with contacts

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Application Number Priority Date Filing Date Title
CN 201220601084 CN202905645U (en) 2012-11-14 2012-11-14 Temperature sensing type temperature fuse provided with contacts

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105161356A (en) * 2015-08-24 2015-12-16 兴勤(常州)电子有限公司 Temperature fuse module
CN105869952A (en) * 2016-06-15 2016-08-17 厦门赛尔特电子有限公司 Bridge type contact structure temperature sensing switch
CN105977098A (en) * 2016-06-29 2016-09-28 珠海格力电器股份有限公司 Overheat protection device and electric appliance
CN106229213A (en) * 2016-09-23 2016-12-14 贵州遵义鑫阳电子科技有限公司 interrupt relay
WO2017041242A1 (en) * 2015-09-09 2017-03-16 上海长园维安电子线路保护有限公司 Reflowable temperature fuse

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105161356A (en) * 2015-08-24 2015-12-16 兴勤(常州)电子有限公司 Temperature fuse module
WO2017041242A1 (en) * 2015-09-09 2017-03-16 上海长园维安电子线路保护有限公司 Reflowable temperature fuse
CN105869952A (en) * 2016-06-15 2016-08-17 厦门赛尔特电子有限公司 Bridge type contact structure temperature sensing switch
CN105977098A (en) * 2016-06-29 2016-09-28 珠海格力电器股份有限公司 Overheat protection device and electric appliance
CN105977098B (en) * 2016-06-29 2018-06-05 珠海格力电器股份有限公司 Overtemperature protection system and electric appliance
CN106229213A (en) * 2016-09-23 2016-12-14 贵州遵义鑫阳电子科技有限公司 interrupt relay

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