CN202758811U - Thermal protector - Google Patents
Thermal protector Download PDFInfo
- Publication number
- CN202758811U CN202758811U CN 201220277965 CN201220277965U CN202758811U CN 202758811 U CN202758811 U CN 202758811U CN 201220277965 CN201220277965 CN 201220277965 CN 201220277965 U CN201220277965 U CN 201220277965U CN 202758811 U CN202758811 U CN 202758811U
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- temperature
- stator
- static contact
- thermal protector
- moving contact
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Abstract
The utility model discloses a thermal protector which comprises a moving contact piece, a static contact piece and a housing. The moving contact piece comprises a stator plate, a bimetallic strip, and a moving contact head. A front portion of the stator plate is a cascaded surface. A projection is provided on the cascaded surface of the stator plate. The bimetallic strip is positioned below the stator plate and is spot-welded on the projection. The moving contact piece and the static contact piece are riveted together. The moving contact head is arranged at a far end of the bimetallic strip. A far end of the static contact piece is provided with a static contact head corresponding to the moving contact head. The thickness of the moving contact head is basically same as the thickness of the static contact head. An auxiliary temperature-sensitive surface and a main temperature-sensitive surface of the housing are respectively corresponding to the static contact piece and the moving contact piece. The thermal protector with the above structure has the characteristics of simple structure, low cost, high welding reliability, high production efficiency, and high qualified rate, the service life design is reasonable in application, the temperature measurement is rapid, accurate and stable, the temperature uniformity of the bimetallic strip is high, and occurrence of false actions is eliminated.
Description
[technical field]
The utility model relates to a kind of thermal protector, is widely used in the fields such as motor, electric heating appliance, ligthing paraphernalia, communication apparatus, computer, instrument, storage battery, controller, belongs to that electrical appliance is overheated, the emergency protective device of overcurrent.
[background technology]
Thermal protector is widely used in the various electronics of industry and family expenses; in the electric equipment; people have higher requirement to the safety of electronics and electric product; present known overcurrent; its moving contact of overheated type thermal protector and fixed contact differ designed life; cost is higher; the thermal protector packaging efficiency is low; the assembly that movable contact spring and static contact consist of before the spot welding wire can not screen; cause semi-finished product; product qualified rate is low; repair rate is high; the bimetal leaf that consists of movable contact spring is on being welded to stator the time; be difficult to accurate tack-weld; weld unreliable and inefficiency; thermal protector in actual use; because the cold and hot exchange of temperature; weld can come off; cause the thermal protector cisco unity malfunction; and the not main temperature-sensitive face of thermal protector that uses now and time temperature-sensitive face minute; the temperature that thermal protector monitors can not be direct; reflect fast protected actual work temperature; there is hysteresis in thermal protector to the reflection of protected working temperature; because the holder setting in the enclosure, movable contact spring exists constant intensity and the degree of balance not enough and affect the consistency of its temperature.
[utility model content]
The utility model for the deficiencies in the prior art be intended to improved mode provide that a kind of soldering reliability is high, production efficiency is high, the rapid accurate stable of thermometric and thermal protector simple in structure, that cost is low, qualification rate is high.
For solving the problems of the technologies described above; the utility model provides following technical scheme: protector; comprise movable contact spring; static contact; the first external wire end; the second external wire end and shell; movable contact spring; static contact respectively with the first external wire end; the second external wire end is connected; movable contact spring is comprised of stator and bimetal leaf and moving contact; be provided with projection on the inner bottom surface of stator; has the constant temperature circle on the inner bottom surface of bimetal leaf; below and point that bimetal leaf is positioned at stator are welded on the projection of this stator; static contact comprises base plate and fixed contact; movable contact spring and static contact are riveted together; moving contact is arranged on the inner bottom surface of far-end of bimetal leaf, and the far-end of base plate is provided with the fixed contact corresponding with moving contact.
Static contact also comprises a holder, the near-end of base plate is injection-moulded on the holder, and the near-end of base plate is also along stretching out a caudal leg that is connected with the second external wire end, the rear portion of stator has the two side with jaw, and the rear portion of stator is also along stretching out a haptic element that is connected with the first external wire end, the front portion of stator is a cascaded surface, above-mentioned projection is arranged on the inner bottom surface of this cascaded surface, the surface of stator has the tin layer, and it is that cat's paw by the stator rear portion is riveted on the holder of base plate that movable contact spring and static contact are riveted together.
The thickness of its silver-colored face of fixed contact of the moving contact of above-mentioned bimetal leaf and static contact is basic identical.
Above-mentioned shell comprises a sealed end, an openend, a main temperature-sensitive face, secondary temperature-sensitive face and a two side, and two outsides of secondary temperature-sensitive face have chamfering, and secondary its inwall of temperature-sensitive face is corresponding with static contact, and main its inwall of temperature-sensitive face is corresponding with movable contact spring.
The secondary temperature-sensitive face intersection of two madial walls of above-mentioned shell and shell respectively is provided with a reinforcement, in the static contact compartment that static contact consists of between two reinforcements and with secondary temperature-sensitive face, movable contact spring is positioned at the madial wall of two reinforcements belows and the movable contact spring compartment of main temperature-sensitive face formation, and the cascaded surface of stator and main temperature-sensitive mask are gapped.
The utility model thermal protector has following beneficial effect:
1, moving contact and fixed contact lay respectively at the far-end of movable contact spring and static contact, whether be conducive to the convenient moving contact that places in the baking oven of observing requires to separate from fixed contact under the temperature in given process, so that movable contact spring and static contact are respectively before the wire point welding process, can not fall meeting the movable contact spring of quality requirement and the in time screening of assembly of static contact formation, thereby improved the half-finished qualification rate of the utility model thermal protector; And screened those assemblies that fall; can be according to moving contact take-off temperature separately; relevantly successively under corresponding technological requirement temperature, use; carry out the traverse point postwelding and be assembled into again thermal protector; the assembly of movable contact spring and static contact formation has obtained comprehensive utilization like this, thereby greatly reduces the half-finished defect rate of thermal protector.
2, static contact is moulded and is marked with holder; movable contact spring is directly riveted the mode of holder and the modular construction that static contact is fixedly connected and consists of by stator; constant intensity and the degree of balance of this assembly have been increased; improve the uniformity of this assembly temperature, and then promoted the qualification rate of the utility model thermal protector.
3, because the silver-colored face thickness of moving contact and fixed contact is identical, wear-out life is identical, and when thermal protector work, the useful life of thermal protector was reasonable, so play the purpose of saving cost, increase action frequency, economical rationality.
4, because the main temperature-sensitive face of shell design is to be affixed installation with protected; movable contact spring rapidly temperature-sensitive from protected working temperature; when the temperature of bimetal leaf reached predetermined temperature, bimetal leaf reached the protection purpose under the rapid counter-rotating action of constant temperature circle and cut off circuit.
5, owing to be provided with projection on its inner bottom surface of cascaded surface of stator, be conducive to bimetal leaf accurately, reliably tack-weld on this stator, prevented the generation of movable contact spring feinting deception, and the stator surface has the tin layer, be conducive to a postwelding with stator and bimetal leaf blow together.
6, shell is furnished with movable contact spring compartment and static contact compartment, and the secondary temperature-sensitive face both sides of shell have the chamfering of recognition function, is conducive to assembly that movable contact spring and static contact are consisted of fast, fit together with shell efficiently; The main temperature-sensitive mask of the step surface of stator and shell is gapped, can prevent effectively that shell is subjected to the step surface of stator after the external force extruding and is positioned at that bimetal leaf it under is related to be squeezed interference and to cause the bimetal leaf temperature fluctuation.
[description of drawings]
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the structural representation of the utility model thermal protector;
Fig. 2 is vertical view of the present utility model;
Fig. 3 is the A-A cutaway view of Fig. 1 housing.
[embodiment]
Please refer to shown in Fig. 1-3, thermal protector, comprise movable contact spring 1, static contact 2, the first external wire end 5, the second external wire end 6 and shell 3, one end of movable contact spring 1 be connected to external circuit in the first external wire end 5 of going link to each other, one end of static contact 2 be connected to external circuit in the second external wire end 6 of going link to each other, movable contact spring 1 is comprised of stator 1c and bimetal leaf 1b and moving contact 1a, be provided with the projection 13 for bimetal leaf 1b means of spot welds on the inner bottom surface of stator 1c, static contact 2 comprises base plate 2b and fixed contact 2a, moving contact 1a is arranged at the inner bottom surface of the far-end of bimetal leaf 1b, and the far-end of base plate 2b is provided with the fixed contact 2a corresponding with moving contact 1a; Shell 3 comprises main temperature-sensitive face 8 and secondary temperature-sensitive face 9, and the main temperature-sensitive face 8 of shell 3 is corresponding with movable contact spring 1, and the secondary temperature-sensitive face 9 of shell 3 is corresponding with static contact 2; The near-end of the near-end of movable contact spring 1 and static contact 2 is riveted together.
Moving contact 1a and fixed contact 2a lay respectively at the far-end of movable contact spring 1 and static contact 2, whether be conducive to the convenient moving contact 1a that places in the baking oven that observes separates from fixed contact 2a under the technological requirement temperature, so that before movable contact spring 1 and static contact 2 be welded in respectively the first external wire end 5, the second external wire end 6 operations, can not fall meeting the in time screening of assembly that the movable contact spring 1 of quality requirement and static contact 2 consist of, thereby improved the qualification rate of thermal protector; And screened those assemblies that fall; can be according to moving contact take-off temperature separately; relevantly successively under corresponding technological requirement temperature, use; carry out the traverse point postwelding and be assembled into again thermal protector; the assembly of movable contact spring 1 and static contact 2 formations has obtained comprehensive utilization like this, thereby greatly reduces the half-finished defect rate of thermal protector.
Wherein, the front portion of stator 1c has step surface 7, and has the two side (not shown) with jaw at its rear portion, and the rear portion protrudes out a haptic element 10c backward, the first external wire end 5 and haptic element 10c spot welding machine spot welding link, the inner bottom surface of step surface 7 have a circle shape projection 13; Bimetal leaf 1b is arc, be welded with near its far-end and within it the moving contact 1a with silver-colored face on the bottom surface, bimetal leaf 1b middle part is provided with dish-shaped constant temperature circle 12 on the bottom surface within it, thereby the front of its near-end then tack-weld forms movable contact spring 1 on the projection 13 of the step surface 7 of stator 1c, stator 1c surface is coated with the tin layer; Static contact 2 is by base plate 2b, fixed contact 2a and holder 2c consist of, be provided with the fixed contact 2a with silver-colored face near the far-end of base plate 2b, and the silver-colored face thickness of fixed contact 2a is identical with the silver-colored face thickness of moving contact 1a, the near-end of base plate 2b is moulded and is annotated after on the holder 2c more backward along stretching out a caudal leg 20b, the second external wire end 6 and this caudal leg 20b spot welding machine spot welding link, the near-end of the near-end of movable contact spring 1 and static contact 2 is riveted together, that jaw by stator 1c rear portion is riveted on its below with holder 2c and realizes, so that moving contact 1a and fixed contact 2b are inconsistent, holder 2c adopts the demanding PBT engineering plastics of insulating properties.
The main temperature-sensitive face 8 of shell 3 is pasting protected heater, and movable contact spring 1 is corresponding with the main temperature-sensitive face 8 of shell 3, so the rapid temperature-sensitive of movable contact spring 1 energy is from protected actual work temperature, and bimetal leaf 1b has dish-shaped constant temperature circle 12, when the temperature of bimetal leaf 1b reaches predetermined temperature, bimetal leaf 1b reaches the protection purpose owing to circuit is cut off in the rapid counter-rotating action of dish-shaped constant temperature circle 12; Holder 2c moulds and annotates on the base plate 2b of static contact 2 but not be arranged on shell 3 inside, simple for structure, and the rearward end of stator 1c riveted joint holder 2c, constant intensity and the degree of balance of bimetal leaf 1b have been strengthened, so that the temperature of bimetal leaf 1b is even, so this thermal protector repair rate is low, qualification rate is high; Owing to be provided with projection 13 on cascaded surface 7 its inner bottom surfaces of stator 1c, the close end that is conducive to bimetal leaf 1b accurately, reliably tack-weld on this stator 1c, prevented the generation of movable contact spring 1 feinting deception, play better the protection heater, the contact of thermal protector can not produce spark owing to the feinting deception of movable contact spring 1, prolonged the useful life of thermal protector, stator 1c surface is coated with the tin layer, is coated with nickel dam and more is conducive to a postwelding with stator 1c and bimetal leaf 1b blow together; Because the silver thickness of moving contact 1a and fixed contact 2a is identical, wear-out life is identical, when thermal protector work, the useful life of thermal protector was reasonable, so play the purpose of saving cost, increase action frequency, economical rationality.
Shell 3 is rectangular structure; it has an openend and a sealing end; shell 3 thicker one sides are main temperature-sensitive face 8; shell 3 thinner one sides are secondary temperature-sensitive face 9; and the dual-side of secondary temperature-sensitive face 9 is processed into chamfering 16; for strengthening the intensity of secondary temperature-sensitive face 9; intersection at the both sides inwall of the inwall of secondary temperature-sensitive face 9 and shell 3 respectively is provided with a reinforcement 11; and then the compartment that formation is made of the zone between the reinforcement 11 and secondary temperature-sensitive face 9 is static contact compartment 14; another compartment that is made of reinforcement 11 belows and main temperature-sensitive face 8 that is positioned at shell 3 is movable contact spring compartment 15; the movable contact spring 1 that is connected with the first external wire end 5 is planted behind shell 3 with the combined member that is connected with the static contact 2 of the second external wire end 6; with epoxy resin 4 sealings, so design favourable quick again; assembled heat protector efficiently.
The step surface 7 of stator 1c has the gap with the main temperature-sensitive face 8 of shell 3, can prevent effectively that shell 3 is subjected to the step surface 7 of stator 1c after the external force extruding and is positioned at that bimetal leaf 1b it under is related to be squeezed interference and to cause bimetal leaf 1b temperature fluctuation.
During use; the wire of thermal protector is connected in the primary circuit of the secondary circuit of protected electric equipment or little electric current and goes; thermal protector is installed on the electric device of protecting; main temperature-sensitive face 8 is pasting heating part or the point for measuring temperature place in the protective device, and electric current is inputted through stator 1c, bimetal leaf 1b, moving contact 1a, fixed contact 2a, exported by the second external wire on the base plate 2b through the first external wire of wire.Bimetal leaf 1b is not only as the thermosensitive response element but also as current sensitive element; bimetal leaf 1b is because the 12 rapidly counter-rotating actions of circle shape butterfly constant temperature circle when heating electric temperature degree reaches the heat that produces when the rated function temperature of bimetal leaf 1b or the electric current by thermal protector increase and makes bimetal leaf 1b temperature reach rated function temperature; the silver-colored face of moving contact 1a and the silver-colored emaciated face of fixed contact 2a are from contacting; by the first external wire end 5; stator 1c; bimetal leaf 1b; moving contact 1a; fixed contact 2a; the protective circuit that base plate 2b and the second external wire end 6 consist of is cut off, and reaches overcurrent; the purpose of overtemperature protection.When protected electric drop in temperature during to the reset temperature of bimetallic 1b, bimetal leaf 1b recovers reset condition, and the silver-colored face of moving contact 1a and fixed contact 2a resumes contacts again, thereby connects circuit, protected electric working on.
Claims (5)
1. thermal protector; comprise movable contact spring; static contact; the first external wire end; the second external wire end and shell; movable contact spring; static contact respectively with the first external wire end; the second external wire end is connected; movable contact spring is comprised of stator and bimetal leaf and moving contact; be provided with projection on the inner bottom surface of stator; has the constant temperature circle on the inner bottom surface of bimetal leaf; below and point that bimetal leaf is positioned at stator are welded on the projection of this stator; static contact comprises base plate and fixed contact; it is characterized in that: movable contact spring and static contact are riveted together; moving contact is arranged on the inner bottom surface of far-end of bimetal leaf, and the far-end of base plate is provided with the fixed contact corresponding with moving contact.
2. thermal protector according to claim 1; it is characterized in that: this static contact also comprises a holder; the near-end of base plate is injection-moulded on the holder; and the near-end of base plate is also along stretching out a caudal leg that is connected with the second external wire end; the rear portion of stator has the two side with jaw; and the rear portion of stator is also along stretching out a haptic element that is connected with the first external wire end; the front portion of stator is a cascaded surface; described projection is arranged on the inner bottom surface of this step surface; the surface of stator has the tin layer, and it is that cat's paw by the stator rear portion is riveted on the holder of base plate that described movable contact spring and static contact are riveted together.
3. thermal protector according to claim 1, it is characterized in that: the fixed contact thickness of the moving contact of bimetal leaf and base plate is basic identical.
4. thermal protector according to claim 1; it is characterized in that: described shell comprises a sealed end, an openend, a main temperature-sensitive face, secondary temperature-sensitive face and a two side; two outsides of secondary temperature-sensitive face have chamfering; and secondary its inwall of temperature-sensitive face is corresponding with static contact, and main its inwall of temperature-sensitive face is corresponding with movable contact spring.
5. thermal protector according to claim 2; it is characterized in that: the secondary temperature-sensitive face intersection of two madial walls of shell and shell respectively is provided with a reinforcement; in the static contact compartment that static contact consists of between two reinforcements and with secondary temperature-sensitive face; movable contact spring is positioned at the madial wall of two reinforcements belows and the movable contact spring compartment of main temperature-sensitive face formation, and the step surface of stator and main temperature-sensitive mask are gapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220277965 CN202758811U (en) | 2012-06-01 | 2012-06-01 | Thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220277965 CN202758811U (en) | 2012-06-01 | 2012-06-01 | Thermal protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202758811U true CN202758811U (en) | 2013-02-27 |
Family
ID=47737979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220277965 Expired - Fee Related CN202758811U (en) | 2012-06-01 | 2012-06-01 | Thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202758811U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928263A (en) * | 2014-05-07 | 2014-07-16 | 威海双丰韩柏温度智能控制有限公司 | Miniature thermal protector |
| CN104064402A (en) * | 2014-06-30 | 2014-09-24 | 扬州宝珠电器有限公司 | High-fidelity high-temperature-resistant temperature controller |
| CN104319176A (en) * | 2014-09-26 | 2015-01-28 | 周才强 | Multi-double-metal-piece jump distance superposed snap-action type temperature controlled switch |
| CN109698096A (en) * | 2019-02-21 | 2019-04-30 | 江苏常胜电器股份有限公司 | Thermal protector |
-
2012
- 2012-06-01 CN CN 201220277965 patent/CN202758811U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928263A (en) * | 2014-05-07 | 2014-07-16 | 威海双丰韩柏温度智能控制有限公司 | Miniature thermal protector |
| CN104064402A (en) * | 2014-06-30 | 2014-09-24 | 扬州宝珠电器有限公司 | High-fidelity high-temperature-resistant temperature controller |
| CN104319176A (en) * | 2014-09-26 | 2015-01-28 | 周才强 | Multi-double-metal-piece jump distance superposed snap-action type temperature controlled switch |
| CN109698096A (en) * | 2019-02-21 | 2019-04-30 | 江苏常胜电器股份有限公司 | Thermal protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: SHENGZHOU ELECTRIC POWER COMPANY Effective date: 20130605 Owner name: ZHEJIANG ELECTRIC POWER COMPANY SHAOXING POWER BUR Effective date: 20130605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 312400 SHAOXING, ZHEJIANG PROVINCE TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130605 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Zhejiang Electric Power Company Patentee after: Shaoxing Power Bureau Patentee after: Shengzhou Electric Power Company Address before: Zhejiang province Shengzhou City Ring Road 312400 to Lake Street No. 18 Patentee before: Shengzhou Electric Power Company |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20150601 |
|
| EXPY | Termination of patent right or utility model |