WO2010135903A1 - 具有漏电保护功能的电源插头 - Google Patents

具有漏电保护功能的电源插头 Download PDF

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Publication number
WO2010135903A1
WO2010135903A1 PCT/CN2010/000059 CN2010000059W WO2010135903A1 WO 2010135903 A1 WO2010135903 A1 WO 2010135903A1 CN 2010000059 W CN2010000059 W CN 2010000059W WO 2010135903 A1 WO2010135903 A1 WO 2010135903A1
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WO
WIPO (PCT)
Prior art keywords
pin
power
armature
trip
leakage protection
Prior art date
Application number
PCT/CN2010/000059
Other languages
English (en)
French (fr)
Inventor
邹建华
Original Assignee
中山市开普电器有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中山市开普电器有限公司 filed Critical 中山市开普电器有限公司
Priority to US13/319,854 priority Critical patent/US8390404B2/en
Publication of WO2010135903A1 publication Critical patent/WO2010135903A1/zh

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/70Structural association with built-in electrical component with built-in switch
    • H01R13/713Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • H01R13/7135Structural association with built-in electrical component with built-in switch the switch being a safety switch with ground fault protector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection

Definitions

  • the invention relates to a power plug (referred to as GFCI) with leakage protection function, in particular to a power plug with leakage protection function installed on household appliances such as air conditioners, refrigerators and televisions.
  • GFCI power plug
  • leakage protection function installed on household appliances such as air conditioners, refrigerators and televisions.
  • the invention overcomes the deficiencies of the above technology and provides a strong security protection performance and knot
  • the utility model has the advantages of simple structure, reasonable design, convenient mass production, power plug which can detect the leakage fault of the power cable in real time and timely cut off the connection between the power source and the load and has the leakage protection function.
  • the power plug with leakage protection function includes a casing, a reset button and a test button are arranged on the top surface of the casing; a power line pin, a neutral wire pin and a ground wire pin are arranged at the bottom of the casing, and a circuit board is arranged inside the casing.
  • a leakage protection circuit for detecting a cable leakage fault of the power output is provided on the circuit board, wherein a pair of moving reeds respectively electrically connected to the power line pin and the neutral line pin are fixed at the bottom of the circuit board;
  • a movable contact is electrically connected to the free end of the reed, and a pair of static contacts corresponding to the movable contact are disposed on the circuit board, and the static contact is connected with a power cable for connecting the load;
  • a trip device capable of contacting or disconnecting the movable contact from the stationary contact;
  • the trip device includes a pull rod fixedly connected with the reset button, a pull rod return spring sleeved on the pull rod, and a fixed pair of moving springs a trip plate on the free end and a static armature and a moving armature disposed in the trip coil.
  • the lower end of the tie rod is slidably connected with the movable armature;
  • the outer casing is composed of a front upper cover, a rear upper cover and a lower cover that is fastened together with the front upper cover and the rear upper cover, and the reset button and the test button are disposed in the hole of the upper surface of the rear upper cover and are leaked in Outside, the power line pin, the neutral pin, and the ground pin extend through the hole in the lower surface of the lower cover to the outside 6
  • One end of the movable armature extends out of the trip coil, and an annular groove is disposed at the end, and a longitudinal slot that is slidingly engaged with the annular groove is disposed at a lower end of the pull rod.
  • a shield is fixed to a bottom of the circuit board; the trip coil is fixed in the shield; An opening for the armature to pass through is provided on the shield, and a pair of fixing ears are disposed at the top end of the shield, and one end of the pair of moving springs is respectively fixed on the pair of fixing ears, and the bottom of the shield is fixed with pins
  • the board is provided with a jack for fixing the pin on the pin fixing plate.
  • the trip plate is provided with two connecting blocks, and the connecting block is provided with a fixing hole; the free end of the moving spring is inserted and caught in the fixing hole to fix the trip plate at the end of the two moving springs
  • the movable contact is disposed on the connecting block and electrically connected to the moving reed.
  • a U-shaped metal needle and a test return spring are disposed under the test button; two test points are disposed under the corresponding U-shaped metal needle on the line board, and the U-shaped metal needle constitutes an analog test switch.
  • the leakage protection circuit comprises a trip coil, two zero-sequence transformer control chips and a thyristor, the metal ring of the zero-sequence transformer is sleeved on a power cable connected to the load, and the secondary coil of the zero-sequence transformer Connected to the input end of the control chip, the output end of the control chip is connected to the control electrode of the thyristor; the positive electrode of the thyristor is connected to one end of the trip coil ⁇
  • the beneficial effects of the invention are as follows: 1. When the household appliance accidentally causes a leakage accident during use, when the leakage current reaches 4 ⁇ 6 mA, the power can be cut off to protect the household appliance; 2. When the power line is in the fire line or medium When any phase of the sexual line is broken; the power can be cut off to protect the household appliance; 3.
  • the internal structure of the invention is relatively simple, the design is reasonable, and the mass production is convenient.
  • Figure 1 is a perspective view of the present invention
  • Figure 2 is a completely exploded view of the present invention
  • Figure 3 is a plan view of the present invention
  • Figure 4 is a cross-sectional view taken along line A--A of Figure 3;
  • Figure 5 is an exploded perspective view of the present invention
  • Figure 6 is an exploded perspective view of Figure 5 with the lower cover removed;
  • Figure 7 is a perspective view of the trip device of the present invention.
  • Figure 8 is a perspective view of Figure 7 with the reset button and test button removed;
  • Figure 9 is a perspective view of Figure 8 with the cover removed;
  • Figure 10 is a perspective view of Figure 9 after the trip plate is removed;
  • Figure 11 is a view showing the cooperation between the moving armature and the static armature of the present invention.
  • Figure 12 is a circuit schematic diagram of the leakage protection circuit of the present invention.
  • the present invention discloses a power plug having a leakage protection function, including a housing 1 and a reset button disposed on a top surface of the housing 1 11 and the test button 12; at the bottom of the casing 1 is provided a power line pin 2, a neutral line pin 3, a ground pin 4, a circuit board 5 is disposed inside the casing 1, and a circuit board 5 is provided with a power supply for detecting the power output.
  • Leakage protection circuit for cable leakage fault a pair of moving springs 7 respectively electrically connected to the power line pin 2 and the neutral line pin 3 are fixed at the bottom of the circuit board 5, and are respectively electrically connected at the free ends of the pair of moving springs 7
  • the movable contact 71 is provided on the circuit board 5 with a pair of static contacts 51 corresponding to the movable contacts; the static contacts 51 are connected to a power cable for connecting the load, and the movable contact 71 and the stationary contact 51
  • the contact or disconnection can realize the connection or disconnection between the pin and the power cable
  • the trip device 8 is provided with a trip device 8 for contacting or disconnecting the movable contact 71 from the stationary contact 51;
  • the trip device 8 includes fixed with reset button 11 Connection a pull rod 81, a pull rod return spring 82 sleeved on the pull rod 81, a trip plate 83 fixed to the free end of the pair of moving spring pieces 7, and a static armature 84 and a movable
  • the lower end of the pull rod 81 is slidably connected to the movable armature 85.
  • the pull rod 81 is provided with a card position 811; the trip plate 83 is provided with a bayonet 831; after the static armature 84 attracts the moving armature 85, the card of the pull rod 81 can be caught.
  • Bit 811 When using this power plug, first insert the pin into the socket connected to the mains, then press down the reset button 11 by hand to drive the lever 81 to move downward; when pressed to a certain position, the card 811 on the lever 81 The upper surface is caught by the bayonet 831 on the trip plate 83.
  • the pin of the power plug When it is required to use the household appliance, the pin of the power plug needs to be inserted into the socket, and at this time, the movable contact 71 and the static contact 51 are disconnected; in order to realize the connection between the household appliance and the commercial power source; It is necessary to press the reset button 11; it drives the pull rod 81 to move downward, and simultaneously compresses the pull rod return spring 82.
  • the click position 811 on the pull rod 81 passes through the bayonet 831 on the trip plate 83, the trip coil 61 is energized.
  • the static armature 84 is made magnetic; the moving armature 85 is moved; the moving armature 85 drives the rod 81 to move laterally toward the static armature 84, so that the card position 811 is stuck on the bayonet 831, and then the hand is released, and the lever is reset.
  • the spring 82 is reset, the pull rod 81 is moved upward, and the pull rod 81 drives the trip plate 83 to move upward, thereby causing the free end of the moving spring 7 to swing upward; the movable contact 71 is in contact with the static contact 51, and the power cable connecting the load is realized.
  • the electrical connection between the pins allows the mains supply to supply power to the appliance through the plug.
  • the outer casing 1 is composed of a front upper cover 13 rear upper cover 14 and a lower cover 15 that is fastened together with the front upper cover 13 and the rear upper cover 14.
  • the reset button 11 and the test button 12 are disposed on the rear upper cover 14
  • the hole of the upper surface is leaked outside, and the power line pin 2, the neutral pin 3, and the ground pin 4 extend through the hole in the lower surface of the lower cover 15 to the outside.
  • One end of the movable armature 85 protrudes from the trip coil 61, and an annular groove 851 is disposed at the end, and a longitudinal slot 812 is slidably engaged with the annular groove 851 at the lower end of the pull rod 81.
  • a shield 9 is fixed to the bottom of the circuit board 5, and the trip coil 61 is fixed in the shield 9.
  • the shield 9 has an opening 91 through which the armature 85 passes, at the top of the shield 9.
  • a pair of fixing ears 92 are disposed, one ends of the pair of moving springs 7 are respectively fixed on the pair of fixing ears 92, and a pin fixing plate 10 is fixed on the bottom of the shielding cover 9; a fixing pin is arranged on the pin fixing plate 10 Jack.
  • the trip plate 83 is provided with two connecting blocks 832, and the connecting block 832 is provided with a fixing hole; the free end of the moving spring 7 is inserted and caught in the fixing hole to fix the trip plate 83 in two
  • the end of the moving reed 7 is disposed on the connecting block 832 and electrically connected to the moving reed 7.
  • a U-shaped metal needle 121 and a test return spring 122 are disposed under the test button 12, and two test solder joints are disposed on the circuit board 5 corresponding to the U-shaped metal needle 121, which are combined with the U-shaped metal needle 121.
  • Test switch TEST is
  • the U-shaped metal pin 121 instantaneously contacts the two test pads on the circuit board 5; the test circuit is turned on, and the zero-sequence transformer 62 on the leakage protection circuit generates a test leakage current,
  • the secondary coil generates an induction signal, the thyristor SCR is triggered to conduct, the trip coil 61 is short-circuited; the static armature 84 loses magnetic force; the movable armature 85 is released; the latch 811 of the pull rod 81 acts at the pull rod return spring 82 Lowering out of the bayonet 831, the trip plate 83 loses the upward pulling force, and under the action of gravity, the free end of the moving reed 7 swings downward, so that the movable contact 71 is disconnected from the stationary contact 51; Power cable and pin The disconnection between the two, so that the mains power supply will stop supplying power to the household appliances, and the household appliances will stop working.
  • the leakage protection circuit includes a trip coil 61, two zero-sequence transformers 62, a control chip U1, and a thyristor SCR.
  • the metal ring of the zero-sequence transformer 62 is connected to the load.
  • the secondary coil of the zero sequence transformer 62 is connected to the input end of the control chip U1
  • the output end of the control chip 63 is connected to the control pole of the thyristor SCR, and the positive pole and the trip coil 61 of the thyristor SCR are connected.
  • the leakage current reaches 4 ⁇ 6mA
  • zero-sequence transformer secondary winding 62 induces a current leakage signal
  • the SCR is triggered turned off
  • the buckle coil 61 is short-circuited; the static armature 84 loses the magnetic force; the movable armature 85 is released; the latching position 811 of the pull rod 81 is released from the bayonet 831 by the pull rod return spring 82, and the trip plate 83 loses the upward pulling force.
  • the present invention is a power plug which has a leakage protection function and, therefore, has industrial applicability.

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Description

说明书 具有漏电保护功能的电源插头
I技术领域】
本发明涉及一种具有漏电保护功能的电源插头(简称 GFCI) ,尤 其是指一种安装在空调、冰箱、电视等家用电器上的具有漏电保护功 能的电源插头。
【背景技术】
目前;人们是通过电源插头将家用电器连接到市电电源上;现在 市场上的电源插头大多数结构如下:包括有外壳,在外壳上安装有两 个或三个裸露在外面的插脚以及与插脚连接的电源电缆导线,在生产 电器时;将电源插头的电源电缆导线与电器内线路板上的电源接点直 接固定连接在一起, 形成电连接。 当需要使用家用电器时, 只需要将 该电源插头的插脚插入到插座内即可,这样就实现了家用电器与市电 电源的连接 6 由于 该种电源插头内部不具有漏电保护结构; 当插脚 输出侧火线、 中性线、地线间出现漏电故障, 以及插脚输出侧火线与 中性线的短路故障时,将会直接造成家用电器的损害。 目前出现了一 些具有漏电保护功能的电源插头; 虽然在出现故障时能够切断电源; 起到保护家用电器的作用,但是目前这些电源插头的内部结构相对比 较复杂, 不便于大量生产, 为此有必要解决上述问题。
ί发明内容】
本发明克服了上述技术的不足,提供了一种安全保护性能强、结 构简单、设计合理、便于批量生产、 能够实时检测电源电缆漏电故障 并及时切断电源与负载连接的具有漏电保护功能的电源插头。
具有漏电保护功能的电源插头, 包括有外壳、在外壳顶部表面设 置有复位按钮和测试按钮; 在外壳底部设置有电源火线插脚、中性线 插脚、地线插脚, 在外壳内部设置有线路板, 在线路板上设置有用于 检测电源输出的电缆漏电故障的漏电保护电路,其特征在于在线路板 底部固定有一对分别与电源火线插脚、 中性线插脚电连接的动簧片; 在一对动簧片的自由端上分别电连接有动触点,在线路板上设置有一 对与动触点相对应的静触点,该静触点与用于连接负载的电源电缆连 接; 在外壳内设置有可将动触点与静触点接触或断开的脱扣装置; 该 脱扣装置包括有与复位按钮固定连接的拉杆、套在拉杆上的拉杆复位 弹簧、固定在一对动簧片的自由端上的脱扣板以及设置在脱扣线圈内 的静衔铁和动衔铁 i 所述拉杆下端与动衔铁滑动连接; 在拉杆上设置 有卡位,在脱扣板上设置有在静衔铁吸合动衔铁后可卡住拉杆的卡位 的卡口。
所述外壳由前上盖、后上盖以及与该前上盖、后上盖扣合在一起 的下盖组成,所述复位按钮和测试按钮设置在后上盖上表面的孔内并 漏在外面, 所述电源火线插脚、 中性线插脚、地线插脚穿过下盖下表 面的孔伸到外界 6
所述动衔铁的一端伸出脱扣线圈, 且在该端设置有环形凹槽,在 拉杆下端设置有与该环形凹槽滑动卡接的纵向卡槽。
所述线路板的底部固定有护罩; 所述脱扣线圈固定在护罩内; 在 护罩上开有供动衔铁穿过的开口, 在护罩顶端的设置有一对固定耳, 所述一对动簧片的一端分别固定在该对固定耳上,在护罩底部固定有 插脚固定板, 在该插脚固定板上设置有固定插脚的插孔。
脱扣板上设置有两个连接块, 在连接块上开有固定孔;所述动簧 片的自由端插入且卡在固定孔内而使脱扣板固定在两个动簧片的端 部, 所述动触点设置在连接块上且与动簧片电连接。
所述测试按钮的下面设置有 U形金属针和测试复位弹簧; 在线 路板上对应 U形金属针的下方设有两个测试悍点, 其与 U形金属针 组成模拟试验开关。
所述漏电保护电路包括有脱扣线圈、两个零序互感器 控制芯片 以及可控硅, 所述零序互感器的金属环套在连接负载的电源电缆上, 零序互感器的二次线圈与控制芯片输入端连接,控制芯片的输出端与 可控硅的控制极连接; 可控硅的正极与脱扣线圈一端连接 ό
本发明的有益效果是: 1、 当家用电器在使用过程中不慎发生漏 电事故时, 漏电电流达到 4~6mA时, 能够切断电源, 起到保护家用 电器的作用; 2、 当电源火线或中性线任何一相出现断路时; 能够切 断电源, 起到保护家用电器的作用; 3、 本发明的内部结构相对比较 简单, 设计合理, 便于大量生产。
[附图说明】
图 1为本发明的立体图;
图 2为本发明的完全分解图;
图 3为本发明的平面图; 图 4为图 3的 A- -A剖视图;
图 5为本发明的立体分解图;
图 6为图 5去掉下盖后的立体分解图;
图 7为本发明的脱扣装置立体图;
图 8为图 7去掉复位按钮和测试按钮后的立体图;
图 9为图 8去掉罩后的立体图;
图 10为图 9去掉脱扣板后的立体图;
图 11为本发明的动衔铁与静衔铁之间的配合图;
图 12为本发明的漏电保护电路的电路原理图。
【具体实施方式】
下面结合附图与本发明的实施方式作进一步详细的描述: 参见图 1-11, 本发明公开了一种具有漏电保护功能的电源插头, 包括有外壳 1、在外壳 1顶部表面设置有复位按钮 11和测试按钮 12; 在外壳 1底部设置有电源火线插脚 2、 中性线插脚 3、 地线插脚 4, 在外壳 1内部设置有线路板 5, 在线路板 5上设置有用于检测电源输 出的电缆漏电故障的漏电保护电路;在线路板 5底部固定有一对分别 与电源火线插脚 2、 中性线插脚 3电连接的动簧片 7, 在一对动簧片 7的自由端上分别电连接有动触点 71,在线路板 5上设置有一对与动 触点相对应的静触点 51 ; 该静触点 51与用于连接负载的电源电缆连 接,动触点 71与静触点 51的接触或断开可以实现插脚与电源电缆之 间的连接或断开,在外壳 1内设置有可将动触点 71与静触点 51接触 或断开的脱扣装置 8; 该脱扣装置 8包括有与复位按钮 11固定连接 的拉杆 81、 套在拉杆 81上的拉杆复位弹簧 82、 固定在一对动簧片 7 的自由端上的脱扣板 83以及设置在脱扣线圈 61内的静衔铁 84和动 衔铁 85, 所述拉杆 81下端与动衔铁 85滑动连接, 在拉杆 81上设置 有卡位 811 ; 在脱扣板 83上设置有卡口 831 ; 在静衔铁 84吸合动衔 铁 85后可卡住拉杆 81的卡位 811的。使用本电源插头时, 先将插脚 插入到与市电连接的插座内, 然后用手向下按住复位按钮 11, 带动 拉杆 81向下移动;当按到一定位置时拉杆 81上的卡位 811上表面卡 住在脱扣板 83上的卡口 831。 当需要使用家用电器时, 需要将该电 源插头的插脚插入到插座内,此时,动触点 71与静触点 51之间是断 开的; 要想实现家用电器与市电电源的连接; 需要按下复位按钮 11 ; 其带动拉杆 81 向下移动, 并同时压缩拉杆复位弹簧 82, 当拉杆 81 上的卡位 811穿过脱扣板 83上的卡口 831时,由于脱扣线圈 61通电, 使其内的静衔铁 84产生磁性; 吸合动衔铁 85; 动衔铁 85带动拉杆 81向静衔铁 84方向横向移动, 使得卡位 811卡在卡口 831上, 此时 松开手, 拉杆复位弹簧 82复位带动拉杆 81向上移动, 拉杆 81带动 脱扣板 83向上移动, 从而带动动簧片 7的自由端向上摆动; 使得动 触点 71与静触点 51接触,实现连接负载的电源电缆与插脚之间的电 连接, 这样市电电源就可以通过本插头对家用电器进行供电了。
所述外壳 1由前上盖 13 后上盖 14以及与该前上盖 13、后上盖 14扣合在一起的下盖 15组成, 所述复位按钮 11和测试按钮 12设置 在后上盖 14上表面的孔内并漏在外面, 所述电源火线插脚 2、 中性 线插脚 3、 地线插脚 4穿过下盖 15下表面的孔伸到外界。 所述动衔铁 85的一端伸出脱扣线圈 61, 且在该端设置有环形凹 槽 851, 在拉杆 81下端设置有与该环形凹槽 851滑动卡接的纵向卡 槽 812。
在所述线路板 5的底部固定有护罩 9, 所述脱扣线圈 61固定在 护罩 9内, 在护罩 9上开有供动衔铁 85穿过的开口 91, 在护罩 9顶 端的设置有一对固定耳 92, 所述一对动簧片 7的一端分别固定在该 对固定耳 92上, 在护罩 9底部固定有插脚固定板 10; 在该插脚固定 板 10上设置有固定插脚的插孔。
所述脱扣板 83上设置有两个连接块 832, 在连接块 832上开有 固定孔; 所述动簧片 7的自由端插入且卡在固定孔内而使脱扣板 83 固定在两个动簧片 7的端部, 所述动触点 71设置在连接块 832上且 与动簧片 7电连接。
所述测试按钮 12的下面设置有 U形金属针 121和测试复位弹簧 122, 在线路板 5上对应 U形金属针 121的下方设有两个测试焊点, 其与 U形金属针 121组成模拟试验开关 TEST。 当按下测试按钮 12 时 U形金属针 121与线路板 5上的两个测试焊点瞬间接触; 试验回 路被导通, 漏电保护电路上的零序互感器 62产生一个试验漏电流, 其二次线圈产生一个感应信号, 可控硅 SCR被触发导通, 脱扣线圈 61被短路接通; 静衔铁 84失去磁力; 动衔铁 85被释放; 拉杆 81的 卡位 811在拉杆复位弹簧 82的作用下脱离出卡口 831, 脱扣板 83失 去向上的拉力, 在重力的作用下, 动簧片 7的自由端向下摆动, 使得 使得动触点 71与静触点 51断开;实现连接负载的电源电缆与插脚之 间的断开,这样市电电源就停止对家用电器进行供电,家用电器停止 工作。
如图 12所示, 所述漏电保护电路包括有脱扣线圈 61、 两个零序 互感器 62、 控制芯片 U1以及可控硅 SCR; 所述零序互感器 62的金 属环套在连接负载的电源电缆上, 零序互感器 62的二次线圈与控制 芯片 U1输入端连接, 控制芯片 63的输出端与可控硅 SCR的控制极 连接, 可控硅 SCR的正极与脱扣线圈 61—端连接 ό 当家用电器在使 用过程中不慎发生漏电事故时, 漏电电流达到 4~6mA时, 零序互感 器 62的二次线圈中感应一个漏电流信号, 可控硅 SCR被触发导通, 脱扣线圈 61被短路接通; 静衔铁 84失去磁力; 动衔铁 85被释放; 拉杆 81的卡位 811在拉杆复位弹簧 82的作用下脱离出卡口 831, 脱 扣板 83失去向上的拉力, 在重力的作用下, 动簧片 7的自由端向下 摆动;使得动触点 71与静触点 51断开; 实现连接负载的电源电缆与 插脚之间的断开,这样市电电源就停止对家用电器进行供电,家用电 器停止工作。
或者, 当电源火线或中性线任何一相出现断路时; 脱扣线圈 61 断路, 静衔铁 84失去磁力, 动衔铁 85被释放, 拉杆 81的卡位 811 在拉杆复位弹簧 82的作用下脱离出卡口 831, 脱扣板 83失去向上的 拉力; 在重力的作用下, 动簧片 7的自由端向下摆动; 使得使得动触 点 71与静触点 51断开,实现连接负载的电源电缆与插脚之间的断开, 这样市电电源就停止对家用电器进行供电, 家用电器停止工作。
【工业实用性】 本发明是电源插头, 其具有漏电保护功能, 因此, 其具有产业上 的可利用性。

Claims

权利要求书
1、具有漏电保护功能的电源插头,包括有外壳(1)、在外壳(1) 顶部表面设置有复位按钮(11)和测试按钮(12), 在外壳(1)底部 设置有电源火线插脚(2)、 中性线插脚(3)、 地线插脚(4); 在外壳
(I) 内部设置有线路板(5), 在线路板(5)上设置有用于检测电源 输出的电缆漏电故障的漏电保护电路, 其特征在于在线路板 (5) 底 部固定有一对分别与电源火线插脚 (2)、 中性线插脚 (3) 电连接的 动簧片( 7 ),在一对动簧片( 7 )的自由端上分别电连接有动触点( 71 ), 在线路板(5)上设置有一对与动触点相对应的静触点(51), 该静触 点 (51) 与用于连接负载的电源电缆连接; 在外壳 (1) 内设置有可 将动触点(71)与静触点(51)接触或断开的脱扣装置(8), 该脱扣 装置(8)包括有与复位按钮(11) 固定连接的拉杆(81)、 套在拉杆
(81)上的拉杆复位弹簧(82)、 固定在一对动簧片 (7)的自由端上 的脱扣板(83) 以及设置在脱扣线圈 (61) 内的静衔铁(84)和动衔 铁(85), 所述拉杆(81)下端与动衔铁(85)滑动连接, 在拉杆(81) 上设置有卡位(811); 在脱扣板(83)上设置有在静衔铁(84)吸合 动衔铁 (85) 后可卡住拉杆 (81) 的卡位 (811) 的卡口 (831)。
2、 根据权利要求 1所述的具有漏电保护功能的电源插头, 其特 征在于所述外壳(1) 由前上盖(13)、 后上盖(14) 以及与该前上盖
(13)、 后上盖 (14) 扣合在一起的下盖 (15) 组成, 所述复位按钮
(II)和测试按钮(12)设置在后上盖(14)上表面的孔内并漏在外 面; 所述电源火线插脚 (2)、 中性线插脚 (3)、 地线插脚 (4) 穿过 下盖 (15 ) 下表面的孔伸到外界。
3、 根据权利要求 1或 2所述的具有漏电保护功能的电源插头, 其特征在于所述动衔铁 (85 ) 的一端伸出脱扣线圈 (61 ), 且在该端 设置有环形凹槽(851 ),在拉杆(81 )下端设置有与该环形凹槽(851 ) 滑动卡接的纵向卡槽 (812)。
4、 根据权利要求 3所述的具有漏电保护功能的电源插头, 其特 征在于所述线路板(5 ) 的底部固定有护罩(9), 所述脱扣线圈 (61 ) 固定在护罩(9) 内, 在护罩(9)上开有供动衔铁(85)穿过的开口
(91 ), 在护罩 (9) 顶端的设置有一对固定耳 (92), 所述一对动簧 片 (7) 的一端分别固定在该对固定耳(92)上, 在护罩(9)底部固 定有插脚固定板 (10), 在该插脚固定板 (10) 上设置有固定插脚的 插孔。
5、 根据权利要求 1所述的具有漏电保护功能的电源插头, 其特 征在于脱扣板 (83) 上设置有两个连接块 (832), 在连接块(832) 上开有固定孔, 所述动簧片 (7) 的自由端插入且卡在固定孔内而使 脱扣板(83 ) 固定在两个动簧片 (7) 的端部; 所述动触点 (71 ) 设 置在连接块(832) 上且与动簧片 (7) 电连接。
6、 根据权利要求 1所述的具有漏电保护功能的电源插头, 其特 征在于所述测试按钮 (12) 的下面设置有 U形金属针 (121 )和测试 复位弹簧 (122), 在线路板 (5) 上对应 U形金属针 (121 ) 的下方 设有两个测试焊点, 其与 U 形金属针 (121 ) 组成模拟试验开关
(TEST)o 7s 根据权利要求 1所述的具有漏电保护功能的电源插头, 其特 征在于所述漏电保护电路包括有脱扣线圈 (61)、 两个零序互感器
(62)、 控制芯片 (U1) 以及可控硅 (SCR), 所述零序互感器 (62) 的金属环套在连接负载的电源电缆上, 零序互感器(62)的二次线圈 与控制芯片 (U1)输入端连接, 控制芯片 (U1) 的输出端与可控硅
(SCR) 的控制极连接, 可控硅 (SCR) 的正极与脱扣线圈 (61) — 端连接。
PCT/CN2010/000059 2009-05-27 2010-01-13 具有漏电保护功能的电源插头 WO2010135903A1 (zh)

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