CN204651615U - A kind of safety plug - Google Patents
A kind of safety plug Download PDFInfo
- Publication number
- CN204651615U CN204651615U CN201520229380.6U CN201520229380U CN204651615U CN 204651615 U CN204651615 U CN 204651615U CN 201520229380 U CN201520229380 U CN 201520229380U CN 204651615 U CN204651615 U CN 204651615U
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- CN
- China
- Prior art keywords
- zero line
- protective tube
- live prong
- plug
- electrically connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A kind of safety plug, comprise insulation crust, live prong, zero line pin, hot terminal and zero line binding post, zero line pin is electrically connected with zero line binding post, it is characterized in that: described safety plug also comprises protective tube, two electrodes of protective tube are electrically connected with live prong, hot terminal respectively.The utility model by accessing protective tube between live prong and hot terminal; plug itself is made to have defencive function; security performance is good; when there is unexpected so that current anomaly rising in the electric equipment that plug connects or terminal block; protective tube fuses and cuts off electric current; the safety of protective device equipment and operator, plays a good protection.
Description
Technical field
The utility model relates to electric component, is specifically related to a kind of safety plug.
Background technology
Plug generally comprises insulation crust, multiple pin and multiple binding post, and binding post and one_to_one corresponding identical with pin quantity is electrically connected.Pin is for inserting corresponding jack in supply socket and switching on power; Binding post is used for extracting power supply cord to electric equipment or terminal block (i.e. insert row, also known as socket).Plug is generally divided into two-pin plug (i.e. two-wire plug) and three-pin plug (i.e. two pole grounded plug).Two-pin plug is provided with two pins and two binding posts, and two pins are respectively live prong and zero line pin, is respectively used to connect live wire and zero line.Three-pin plug is provided with three pins and three binding posts, and wherein two pins are respectively used to connect live wire and zero line (these two pins are respectively live prong and zero line pin), and another pin is grounding pin.
Existing plug only plays the effect that circuit connects, and do not have defencive function, security performance is poor.During actual use, if there is short circuit between connection live wire and two pins of zero line, or human body accesses the situation between these two pins, because plug remains "on" position, and therefore very easily generation electric fault or electric shock accidents, extremely danger.
In addition, plug and socket plug together between surface substantially tight when plugging together, but, plug together between surface and inevitably there is gap, like this, when using under comparatively moist environment, steam easily enters in this gap, so that live prong and zero line pin are short-circuited through water conducting, more seriously, if the hand-held meeting shaping claviform of human body to enter in this gap and touches these pins, electric shock accidents can be caused.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind ofly has the good safety plug of defencive function, security performance.The technical scheme adopted is as follows:
A kind of safety plug, comprise insulation crust, live prong, zero line pin, hot terminal and zero line binding post, zero line pin is electrically connected with zero line binding post, it is characterized in that: described safety plug also comprises protective tube, two electrodes of protective tube are electrically connected with live prong, hot terminal respectively.
Protective tube (also known as fuse or fuse), protective tube can when current anomaly be elevated to certain height and be certain, and electric current is cut off in self fusing, thus plays the effect of protective circuit safe operation.Protective tube generally comprises melt, support and two electrodes, and two electrodes connect the two ends of melt respectively, and melt and two electrodes are all fixed on support.The effect cutting off electric current is played during melt fusing; Electrode is the parts that melt connects with circuit; Support has good mechanical strength, insulating properties, thermal endurance and anti-flammability; its effect is fixed melt and two electrodes; make melt, electrode and support three parts become the entirety of rigidity so that the installation of protective tube, use, support also plays the protective effect to melt.
By accessing protective tube between live prong and hot terminal, like this, live prong, protective tube, electric equipment or terminal block, zero line pin connect successively, and plug forms primary Ioops after inserting supply socket.The electric equipment connected when plug or terminal block occur unexpected (as short circuit appears in certain socket on terminal block), so that when current anomaly raises, protective tube fuses and cuts off electric current, and the safety of protective device equipment and operator, plays a good protection.
For the ease of installation and the replacing of protective tube, insulating base is provided with in preferred above-mentioned insulation shell, insulating base is provided with protective tube mounting groove, two pairs of metallic springs are provided with in protective tube mounting groove, wherein pair of metal spring leaf clamps an electrode of protective tube, and another clamps another electrode of protective tube to metallic spring; Position corresponding with protective tube mounting groove on insulation shell is provided with opening, and this opening is detachably provided with cover plate.The elasticity that metallic spring self has, enables paired metallic spring be clamped by the electrode of protective tube on the one hand, guarantees reliable contacts, on the other hand, when protective tube changed by needs, is convenient to the taking-up of protective tube.Usually, metallic spring is curved, and paired metallic spring surrounds a sub-circular and open-topped cavity, and the electrode of protective tube is in this cavity.Above-mentioned cover plate covers protective tube mounting groove, cover plate usually with the edge clamping of above-mentioned opening.
When being provided with insulating base in insulation shell, live prong lower end, zero line pin lower end are all fixed on insulating base, and insulation shell is provided with live prong, position that zero line pin is corresponding the through hole stretched out for live prong, zero line pin.In one concrete scheme, live prong lower end extends the first wire connecting portion downwards, zero line pin lower end extends the second wire connecting portion downwards, first wire connecting portion is electrically connected with pair of metal spring leaf, another is electrically connected with hot terminal metallic spring, and the second wire connecting portion is electrically connected with zero line binding post.
In preferred version, above-mentioned live prong bottom (namely live prong is close to the part of insulation crust) and zero line pin bottom (namely zero line pin is close to the part of insulation crust) is all coated with insulating barrier.Like this, when plug and supply socket plug together, live prong top and zero line pin top switch on power, now, although plug and supply socket plug together between surface there is certain interval, but the part surface exposed in the gap due to live prong, zero line pin insulate, even if therefore have steam to enter in this gap also can not cause live prong and zero line pin conducting, even if or the object of the hand-held meeting conduction of human body to enter in this gap and to touch these pins, also can not cause electric shock accidents.Above-mentioned insulating barrier can be the sleeve of rubber or plastic material, also can be to be coated in the insulating lacquer layer in live prong lower surface, zero line pin lower surface.Usually, live prong is surperficial, zero line pin is surperficial should be all level and smooth, when making this live prong, zero line pin, first can make the Metallic rod that a bottom is dimensioned slightly smaller than top, coated insulation layer on the surface of this Metallic rod bottom again, forms live prong, zero line pin.
The utility model can be applicable to two-pin plug (i.e. two-wire plug) and three-pin plug (i.e. two pole grounded plug).When being applied to three-pin plug, on the basis of above-mentioned live prong and zero line pin, set up a grounding pin, and corresponding ground wire binding post.
The utility model by accessing protective tube between live prong and hot terminal; plug itself is made to have defencive function; security performance is good; when there is unexpected so that current anomaly rising in the electric equipment that plug connects or terminal block; protective tube fuses and cuts off electric current; the safety of protective device equipment and operator, plays a good protection.
Accompanying drawing explanation
Fig. 1 is the structural representation (broken section, slice location is as shown in the cutting symbol A-A in Fig. 2) of the utility model preferred embodiment;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the vertical view of plug interior structure shown in Fig. 1 (namely removing insulation crust);
Fig. 4 is the upward view of plug interior structure shown in Fig. 1 (namely removing insulation crust).
Embodiment
As depicted in figs. 1 and 2, this safety plug is three-pin plug (i.e. two pole grounded plug), comprise insulation crust 1, live prong 2, zero line pin 3, grounding pin 4, hot terminal 5, zero line binding post 6, ground wire binding post 7 and protective tube 8, zero line pin 3 is electrically connected with zero line binding post 6, grounding pin 4 is electrically connected with ground wire binding post 7, and two electrodes 9 of protective tube 8 are electrically connected with live prong 2, hot terminal 5 respectively.
Protective tube 8 adopts conventional fuse pipe, and comprise the two ends that melt, support and two electrodes, 9, two electrodes 9 connect melt respectively, melt and two electrodes 9 are all fixed on support.
With reference to figure 1 and Fig. 3, in the present embodiment, insulating base 10 is provided with in insulation shell 1, insulating base 10 is provided with protective tube mounting groove 11, two pairs of metallic springs 12 are provided with in protective tube mounting groove 11, wherein pair of metal spring leaf 12 clamps an electrode 9 of protective tube 8, and another clamps another electrode 9 of protective tube 8 to metallic spring 12; Position corresponding with protective tube mounting groove 11 on insulation shell 1 is provided with opening 13, and this opening 13 is detachably provided with cover plate 14.Cover plate 14 covers protective tube mounting groove 11, cover plate 14 can with the edge clamping of opening 13.Usually, metallic spring 12 is curved, and paired metallic spring 12 surrounds a sub-circular and open-topped cavity, and the electrode 9 of protective tube 8 is in this cavity.
With reference to figure 1, Fig. 3 and Fig. 4, live prong 2 lower end, zero line pin 3 lower end, grounding pin 4 lower end are all fixed on insulating base 10, and insulation shell 1 is provided with live prong 2, zero line pin 3, position that grounding pin 4 is corresponding the through hole stretched out for live prong 2, zero line pin 3, grounding pin 4.Live prong 2 lower end extends the first wire connecting portion 15 downwards, zero line pin 3 lower end extends the second wire connecting portion 16 downwards, grounding pin 4 lower end extends the 3rd wire connecting portion 17 downwards, first wire connecting portion 15 is electrically connected with pair of metal spring leaf 12, another is electrically connected with hot terminal 5 metallic spring 12, second wire connecting portion 16 is electrically connected with zero line binding post 6, and the 3rd wire connecting portion 17 is electrically connected with ground wire binding post 7.
In the present embodiment, live prong 2 bottom (namely live prong 2 is close to the part of insulation crust 1) and zero line pin 3 bottom (namely zero line pin 3 is close to the part of insulation crust 1) is all coated with insulating barrier 18.Above-mentioned insulating barrier 18 can be the sleeve of rubber or plastic material, also can be to be coated in the insulating lacquer layer in live prong 2 lower surface, zero line pin 3 lower surface.
In safety plug, by accessing protective tube 8 between live prong 2 and hot terminal 5, like this, live prong 2, protective tube 8, electric equipment or terminal block, zero line pin 3 connect successively, and plug forms primary Ioops after inserting supply socket; The electric equipment connected when plug or terminal block occur unexpected (as short circuit appears in certain socket on terminal block), so that when current anomaly raises, protective tube 8 fuses and cuts off electric current.In addition, when plug and supply socket plug together, live prong 2 top and zero line pin 3 top switch on power, now, although plug and supply socket plug together between surface there is certain interval, but the part surface exposed in the gap due to live prong 2, zero line pin 3 insulate, also live prong 2 and zero line pin 3 conducting can not be caused even if therefore there is steam to enter in this gap, even if or the object of the hand-held meeting conduction of human body to enter in this gap and to touch these pins, also can not cause electric shock accidents.
The utility model also can be applicable to two-pin plug (i.e. two-wire plug), and now plug does not arrange grounding pin and ground wire binding post.
Claims (5)
1. a safety plug, comprise insulation crust, live prong, zero line pin, hot terminal and zero line binding post, zero line pin is electrically connected with zero line binding post, it is characterized in that: described safety plug also comprises protective tube, two electrodes of protective tube are electrically connected with live prong, hot terminal respectively.
2. safety plug according to claim 1, it is characterized in that: in described insulation shell, be provided with insulating base, insulating base is provided with protective tube mounting groove, two pairs of metallic springs are provided with in protective tube mounting groove, wherein pair of metal spring leaf clamps an electrode of protective tube, and another clamps another electrode of protective tube to metallic spring; Position corresponding with protective tube mounting groove on insulation shell is provided with opening, and this opening is detachably provided with cover plate.
3. safety plug according to claim 2, it is characterized in that: described live prong lower end extends the first wire connecting portion downwards, zero line pin lower end extends the second wire connecting portion downwards, first wire connecting portion is electrically connected with pair of metal spring leaf, another is electrically connected with hot terminal metallic spring, and the second wire connecting portion is electrically connected with zero line binding post.
4. the safety plug according to any one of claim 1-3, is characterized in that: described live prong bottom and zero line pin bottom are all coated with insulating barrier.
5. safety plug according to claim 4, is characterized in that: described insulating barrier is the sleeve of rubber or plastic material, or is coated in the insulating lacquer layer in live prong lower surface, zero line pin lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520229380.6U CN204651615U (en) | 2015-04-16 | 2015-04-16 | A kind of safety plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520229380.6U CN204651615U (en) | 2015-04-16 | 2015-04-16 | A kind of safety plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204651615U true CN204651615U (en) | 2015-09-16 |
Family
ID=54104327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520229380.6U Expired - Fee Related CN204651615U (en) | 2015-04-16 | 2015-04-16 | A kind of safety plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204651615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058532A (en) * | 2016-05-27 | 2016-10-26 | 冠德科技(北海)有限公司 | Power adapter based on European standard circle pin |
-
2015
- 2015-04-16 CN CN201520229380.6U patent/CN204651615U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058532A (en) * | 2016-05-27 | 2016-10-26 | 冠德科技(北海)有限公司 | Power adapter based on European standard circle pin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20190416 |