CN101197480B - Plug - Google Patents
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- CN101197480B CN101197480B CN200710125031XA CN200710125031A CN101197480B CN 101197480 B CN101197480 B CN 101197480B CN 200710125031X A CN200710125031X A CN 200710125031XA CN 200710125031 A CN200710125031 A CN 200710125031A CN 101197480 B CN101197480 B CN 101197480B
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- shell
- plug
- base plate
- thermistor
- electrically connected
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Abstract
The invention provides a plug, comprising a shell body (1), terminals (2, 3, 4) extending into the shell body, and electric output wires (5, 6, 7). The invention has the characteristics that the shell body is also provided with a temperature and electric current protector (100), wherein the temperature and electric current protector (100) comprises a bimetallic strip (40) and a thermal resistor (50) which is arranged in parallel at the two ends of the bimetallic strip (40); the temperature and electric current protector is arranged in series between the live wire terminal and the live wire of the electric output wire. The invention is capable of preventing the automatic resetting of the bimetallic strip after breaking off to shut off the circuit, which enhances the safety of the use, as the electric supply of the plug needs to be cut off and the power supply needs to be connected to reset the power source after the temperature falls. Therefore, the safety is enhanced; and the plug is more sensitive to the protection of overcurrent.
Description
Technical field
The present invention relates to a kind of attaching plug, particularly relate to a kind of attaching plug with temperature protection function.
Background technology
Traditional attaching plug comprises plug body and stretches into shell interior terminal and power supply output line; plug itself does not have the temperature current defencive function; various electric equipments since attaching plug part long-term use or electric equipment itself breaks down load excessive wait a variety of causes to cause to generate heat in the circuit or electric current excessive; thereby burn out electric equipment even cause fire incident; when ambient temperature raises and when overheated; such plug can't auto power off, does not have protective effect.
In order to prevent pyrolytic damage, the temperature protection plug has appearred in the prior art, and be the plug that has bimetal leaf, overheated when plug, the dynamic and static contact tripping of bimetal leaf makes outage in the plug, relevant electric equipment outage and avoid infringement.If owing to circuit or plug is overheated disconnect after, circuit and plug no longer generate heat, temperature reduces, and after normal range (NR), the bimetallic sector-meeting is closed again, power supply conducting again in the plug, the electric equipment of load is switched on again, still may damage electric equipment, and, if at this moment the user is just fixing a breakdown or the other reasons staff does not leave electric equipment, resetting suddenly of circuit may bring personal injury to the user.As seen have the temperature protection plug of bimetal leaf,, have potential safety hazard though can play superheat protecting function.In addition, for the excessive situation of electric current in the circuit, the protection of bimetal leaf is responsive inadequately.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of overheated tripping of plug that prevents to have the bimetal leaf overtemperature protection automatically reset attaching plug in back that opens circuit; use this plug need the disconnecting plug power supply, wait to lower the temperature after once more energized just can reset, and this plug is responsive more to the protection of overcurrent.
For addressing the above problem; the invention provides a kind of plug; comprise housing, stretch into terminal and power supply output line in the housing; it is characterized in that; also be equipped with a temperature current protector in the described housing; described temperature current protector comprises a bimetal leaf and is connected in parallel on a thermistor at its two ends that this temperature current protector is connected between the live wire of fire line terminal and power supply output line.
In order further to solve the problem that bimetal leaf can respond the intensification of thermistor rapidly, and the problem of compact conformation, the plug that provides in the further technical scheme of the present invention, described temperature current protector is provided with a metal base plate and the metal shell with groove, the groove mouth of described base plate and described shell is relative and be buckled into a cavity with shell, insulate with insulating paper between described base plate and the described shell, described cavity is built-in with described bimetal leaf, one end of described bimetal leaf is electrically connected with described shell, the other end is provided with moving contact, be fixed with a fixed contact outstanding in described cavity on the described base plate, described fixed contact passes the insulating paper of base plate one side and is corresponding with described moving contact, is electrically connected with fixed contact during described moving contact normality, when the bimetal leaf temperature is higher than set point, then leave fixed contact and disconnect electrical connection; One side of described thermistor is close to and is electrically connected on the side of described base plate away from shell, and the opposite side of described thermistor then is electrically connected with a metal clips, and this metal clips also is electrically connected with described shell, and thermistor and shell are compressed; Stretch out an electric connecting terminal respectively from described metal shell and base plate; One of them electric connecting terminal is electrically connected with described fire line terminal, and another electric connecting terminal is electrically connected with the live wire of described power supply output line.
In order further to solve the problem that structure is ingenious, compact, be easy to realize, the present invention adopts further technical scheme, described thermistor is a cuboid, and described metal clips middle part is bent into thermistor profile shape adapting, partly surrounds described thermistor, and the then outside shell side in metal clips two ends is to bending and be held in described shell both sides.
Described every the insulating paper between base plate and shell to the side bending of base plate away from shell, the two ends perk, clamp the both sides of described thermistor.
The outer surface of described shell to inner surface depression, form contact outstanding in cavity, an end that is electrically connected with shell on the described bimetal leaf is provided with fixedly iron nail, this fixedly iron nail fixedly be electrically connected with described contact.
With described bimetal leaf moving contact end corresponding position, the outer surface of described shell also to the inner surface depression, form one outstanding in cavity, be convenient to the projection that bimetal leaf resets.
Be connected with the firm, easy of plug circuit in order to solve the temperature current protector; outer end from the electric connecting terminal of the metal shell of described temperature current protector and base plate is respectively equipped with wiring card; difference clamping one section lead on the described wiring card, described lead are stuck to constitute with second wiring card that conducts electricity with fire line terminal and power supply output line live wire and are electrically connected.
Described housing is an injection molded, and described terminal, power supply output line, temperature current protector are embedded in the housing, and remaining part and terminal and the power supply output line of described temperature current protector except that electric connecting terminal all insulate.
The base plate of described temperature current protector adopts the cold-reduced sheet of iron nickel zinc alloy; Described shell adopts the deep-draw stretching cold-reduced sheet of iron nickel zinc alloy material; Described metal clips adopts stainless steel.
Described plug is three-pin plug or two-pin plug.
Beneficial effect of the present invention is: the present invention has adopted the thermistor protector in parallel with bimetal leaf to be connected on the plug live wire; thermistor has certain conductive capability; the thermistor resistance is very big; when bimetal leaf is crossed thermal cutoff; at this moment electric current passes through from temperature-sensitive resistance; it is big that its resistance becomes rapidly; make in the loop electric current very little; be not enough to drive load; and thermistor energising back heating; heat passes to bimetal leaf, causes bimetal leaf to lower the temperature and resets, and must cut off the electricity supply; make the thermistor outage and stop heating; wait for a few minutes, reclose plug-in power pack after the bimetal leaf cooling, at this moment bimetal leaf just can reset; this reduces naturally with regard to the temperature of having been avoided bimetal leaf and makes plug automatically reset; promptly realized the function that outage just can reset, so not only made circuit play overtemperature protection, and improved safety in utilization.Because thermistor PTC energising back self-heating, resistance increase exponentially, thereby realize protection, so used behind the thermistor current protection of circuit responsive more.
The temperature current protector adopts metal shell, metal base plate and the metal clips of conduction as conductor in the further technical scheme of the present invention; and utilize insulating paper to be base plate and casing insulation; adopt structure compact, ingenious easy row thermistor to be connected in parallel on the two ends of bimetal release; form a small and exquisite protector of being convenient to insert plug casing; can not increase the volume that has the most frequently used ordinary plug now; wherein; the adjacent bimetal leaf of thermistor; the heat that makes the thermistor energising produce can pass to bimetal leaf rapidly, and the protection effect is faster and better.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 1 is a temperature current protector circuit diagram of the present invention.
Fig. 2 is a plug cross-sectional schematic of the present invention.
Fig. 3 is the temperature current protector front view in the plug of the present invention.
Fig. 4 is the A-A cutaway view of Fig. 3.
Fig. 5 is the temperature current protector end view in the plug of the present invention.
Embodiment
Consulting Fig. 2, is the cross-sectional schematic of plug of the present invention, and this schematic diagram has only cutd open plug body, does not cut the temperature current protector open.As shown in the figure; this plug is provided with a plastic casing 1; fire line terminal 2, zero terminal 3 and ground wire terminal 4 parts stretch in the housing; zero terminal 3 and ground wire terminal 4 respectively with housing in the zero line 6 and the corresponding one by one electrical connection of earth connection 7 of power supply output line; and the temperature current protector 100 of having connected between the live wire 5 of fire line terminal 2 and power supply output line, the live wire of power supply output line, zero line, ground wire place together in the line shell 8 and stretch out plug body.Described terminal 2,3,4, power supply output line 5,6,7, temperature current protector 100 are embedded in the shell, and shell can be the integral molded plastic moulding, and remaining part and terminal and the power supply output line of described temperature current protector except that electric connecting terminal all insulate.
Described temperature current protector 100 be one can be too high to electric current in the circuit; the protective device that circuit or ambient temperature play a protective role when overheated; shown in Fig. 3～5; it is provided with a rectangular flat plate shape conducting metal base plate 10 and a conducting metal shell 20; base plate is to be made by the cold-reduced sheet of iron nickel zinc alloy; conduction; good heat conduction effect; and non-corrosive; and shell 20 is made by deep-draw stretching cold-reduced sheet iron nickel zinc alloy material; this metal shell 20 has the groove 22 of notch towards base plate; described base plate 10 is buckled into a cavity with shell 20; insulate with insulating paper 30 between described base plate and the described shell; bimetal leaf 40 is arranged in the described cavity; the one end is electrically connected with described shell 20; electrical connection in the present embodiment is achieved in that the nearly middle part of described shell 20 outer surfaces is recessed to form a contact 23 outstanding in cavity to inner surface; described bimetal leaf 40 corresponding ends are welded with the fixedly iron nail 41 of a conduction, and fixedly iron nail and described contact 23 weld together for these.The other end of described bimetal leaf 40 is moving contacts 42, and conduction fixed contact 12 of giving prominence to described cavity of fixing electrical connection on the described base plate 10, described fixed contact 12 passes the insulating paper 30 of base plate one side and is corresponding with described moving contact 42, is electrically connected with fixed contact 12 during described moving contact 42 normalities then to leave fixed contact and disconnect electrical connection when the bimetal leaf temperature is higher than set point; Reset for the ease of bimetal leaf, outer surface at described shell also is recessed to form outstanding in a cavity projection 25 to inner surface, after bimetal leaf sound contact separates, that end of bimetal leaf moving contact withstands on the described projection 25, can not be close to the inner surface of shell, contact-making surface is little, helps to reset.
As Fig. 4, shown in 5, what one side of the PTC thermistor 50 of a cuboid was electrically connected is close on the base plate 10, be positioned at the side of base plate away from shell 20, and the opposite side of this PTC thermistor 50 is provided with the conducting metal shell fragment 60 of a stainless steel material, these metal clips 60 middle parts are bent into and the suitable rectangular channel 61 of thermistor 50 profiles, part is surrounded and is close to described thermistor, formation is electrically connected with thermistor, and the two ends 62 outside shell sides of metal clips 60 tightly are buckled in described shell both sides to bending, realization like this is electrically connected with described shell, and with thermistor, base plate, insulating paper, shell tightly forces together, and forms compact structure; Be rectangle every the insulating paper between base plate and shell 30, make with the polyester composite material, has certain rigidity, this insulating paper surrounds bottom parts to base plate 10 outer surface bendings, not besieged and be used to place thermistor in the middle of the base plate, 31 perks of insulating paper two ends are clamped in described thermistor 50 between the two ends of perk, has certain fixation, as shown in Figure 5.
As shown in Figure 3, extend an electric connecting terminal 21 integratedly from described metal shell 20, extend another electric connecting terminal 11 integratedly from described base plate 10, do not contact between described two links, insulation each other, the outer end of each electric connecting terminal 21,11 is respectively equipped with wiring card 24,14.
The said structure of temperature current protector has formed circuit as shown in Figure 1 and has connected, and promptly temperature-sensitive resistance 50 is in parallel with bimetal leaf 40.
As shown in Figure 2; difference clamping one section lead 80 on the described wiring card 24,14; wherein a lead is stuck to constitute with second wiring card 70 of fire line terminal 2 usefulness conduction and is electrically connected; another lead then is stuck to constitute by another second wiring card 70 and the live wire 5 of power supply output line and is electrically connected, and so the temperature current protector is connected into the plug live wire.
Usually, bimetal leaf operating temperature of the present invention is from 65 ℃ to 160 ℃, and reset temperature is from 50 ℃ to 105 ℃; So selected thermistor and bimetal leaf reset temperature have relation, common selected thermistor gauge surface temperature is greater than 120 ℃.The thermistor gauge surface temperature must for example adopt the thermistor of LKP0EY00009025 model greater than the product reset temperature.The voltage of thermistor has 110VAC and 220VAC, according to the voltage decision of protective circuit.The room temperature resistance of thermistor is normally between 500～6000 Europe.
When because failure and other reasons, overheated or the overcurrent of circuit, after the bimetal leaf dynamic and static contact tripping, electric current passes through from temperature-sensitive resistance, thermistor generates heat immediately, and thermistor makes the heat transferred bimetal leaf it can't lower the temperature and resets, because the thermistor resistance is big, electric current is very little in the loop, is not enough to drive load, and electric equipment can not move, have only when pulling up plug, or close plug-in power pack, and make thermistor outage and stop heating, wait for that bimetal leaf cools to behind the certain hour to reset, reclose plug-in power pack, plug has been started working again.When the circuit overcurrent, thermistor meeting heating up if make the bimetal leaf temperature surpass limit value and tripping on the one hand, can be realized protection, and on the other hand, thermistor intensification resistance increases much and reduces circuital current, also can realize overcurrent protection.The plug of having set up the temperature current protector of the present invention not only can be a three-pin plug, can also be two-pin plug.
Claims (7)
1. plug, comprise housing (1), stretch into terminal (2,3,4) and power supply output line (5,6,7) in the housing, it is characterized in that, also be equipped with a temperature current protector (100) in the described housing, described temperature current protector (100) comprises a bimetal leaf (40) and is connected in parallel on a thermistor (50) at its two ends that this temperature current protector is connected between the live wire of fire line terminal and power supply output line;
Described temperature current protector (100) is provided with a metal base plate (10) and the metal shell (20) with groove (22), the groove mouth of described base plate and described shell is relative and be buckled into a cavity with shell, insulate with insulating paper (30) between described base plate and the described shell, described cavity is built-in with described bimetal leaf (40), one end of described bimetal leaf is electrically connected with described shell (20), the other end is provided with moving contact (42), be fixed with a fixed contact (12) outstanding in described cavity on the described base plate (10), described fixed contact (12) passes the insulating paper (30) of base plate one side and is corresponding with described moving contact (42), is electrically connected with fixed contact during described moving contact normality, when bimetal leaf (30) then leaves fixed contact when temperature is higher than set point and disconnects electrical connection; One side of described thermistor (50) is close to and is electrically connected on the side of described base plate (10) away from shell, the opposite side of described thermistor then is electrically connected with a metal clips (60), this metal clips (60) also is electrically connected with described shell (20), and thermistor and shell are compressed; Stretch out an electric connecting terminal (21,11) respectively from described metal shell (20) and base plate (10); One of them electric connecting terminal is electrically connected with described fire line terminal, and another electric connecting terminal is electrically connected with the live wire of described power supply output line;
Described thermistor (50) is a cuboid, and described metal clips (60) middle part is bent into thermistor profile shape adapting, partly surrounds described thermistor, and metal clips two ends (62) then outside shell side is to bending and be held in described shell both sides;
Described every the insulating paper between base plate and shell to the side bending of base plate away from shell, two ends (31) perk, clamp the both sides of described thermistor (50).
2. plug according to claim 1, it is characterized in that, the outer surface of described shell caves in, forms contact (23) outstanding in cavity to inner surface, an end that is electrically connected with shell on the described bimetal leaf is provided with fixedly iron nail (41), this fixedly iron nail (41) fixedly be electrically connected with described contact (23).
3. plug according to claim 1 is characterized in that, with described bimetal leaf moving contact end corresponding position, the outer surface of described shell also to the inner surface depression, form one outstanding in cavity, be convenient to the projection (25) that bimetal leaf resets.
4. plug according to claim 1; it is characterized in that; outer end from the electric connecting terminal (21,11) of the metal shell (20) of described temperature current protector and base plate (10) is respectively equipped with wiring card (24,14); difference clamping one section lead (80) on the described wiring card, described lead are stuck to constitute with second wiring card (70) that conducts electricity with fire line terminal (2) and power supply output line live wire (5) and are electrically connected.
5. plug according to claim 1; it is characterized in that; described housing (1) is an injection molded, and described terminal, power supply output line, temperature current protector are embedded in the housing, and remaining part and terminal and the power supply output line of described temperature current protector except that electric connecting terminal all insulate.
6. plug according to claim 1 is characterized in that, the base plate of described temperature current protector (10) adopts the cold-reduced sheet of iron nickel zinc alloy; Described shell (20) adopts the deep-draw stretching cold-reduced sheet of iron nickel zinc alloy material; Described metal clips (60) adopts stainless steel.
7. according to each described plug of claim 1～6, it is characterized in that described plug is three-pin plug or two-pin plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710125031XA CN101197480B (en) | 2007-12-14 | 2007-12-14 | Plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710125031XA CN101197480B (en) | 2007-12-14 | 2007-12-14 | Plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101197480A CN101197480A (en) | 2008-06-11 |
| CN101197480B true CN101197480B (en) | 2010-10-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710125031XA Expired - Fee Related CN101197480B (en) | 2007-12-14 | 2007-12-14 | Plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101197480B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201435503Y (en) * | 2009-01-06 | 2010-03-31 | 深大宇电器(深圳)有限公司 | Over-temperature over-current protecting power plug |
| CN201601333U (en) * | 2010-01-29 | 2010-10-06 | 深大宇电器(深圳)有限公司 | Socket |
| CN103346533A (en) * | 2013-06-25 | 2013-10-09 | 冯锐 | Circuit structure with protection function |
| US20160006190A1 (en) * | 2013-10-24 | 2016-01-07 | Sanyo Electric Co., Ltd. | Electrical cable and power supply device |
| CN104752011A (en) * | 2015-03-25 | 2015-07-01 | 昂纳信息技术（深圳）有限公司 | Method and device for fixing thermistor |
| CN104851744A (en) * | 2015-05-27 | 2015-08-19 | 福建闽航电子有限公司 | Active heating-type overheating protective device |
| CN106766000A (en) * | 2017-01-25 | 2017-05-31 | 青岛海尔空调器有限总公司 | Convertible frequency air-conditioner fire prevention control method and control system |
| CN108448825A (en) * | 2017-10-20 | 2018-08-24 | 台州市双龙泵业有限公司 | High-efficiency energy-conserving small-sized three-phase water-pump motor |
| CN109787042B (en) * | 2017-11-13 | 2021-07-23 | 台达电子工业股份有限公司 | Electrical connector |
| CN110517837A (en) * | 2018-05-21 | 2019-11-29 | 灯达（深圳）电器有限公司 | A kind of highly sensitive self- recoverage insurance using self breakaway-element of graphene energy |
| CN112054350B (en) * | 2020-07-24 | 2021-03-23 | 杜驾麟 | Novel crystal head type automatic disconnection protection plug for wiring |
-
2007
- 2007-12-14 CN CN200710125031XA patent/CN101197480B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101197480A (en) | 2008-06-11 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20101006 Termination date: 20171214 |