CN103543382A - Single-phase socket capable of detecting wiring - Google Patents
Single-phase socket capable of detecting wiring Download PDFInfo
- Publication number
- CN103543382A CN103543382A CN201310520003.3A CN201310520003A CN103543382A CN 103543382 A CN103543382 A CN 103543382A CN 201310520003 A CN201310520003 A CN 201310520003A CN 103543382 A CN103543382 A CN 103543382A
- Authority
- CN
- China
- Prior art keywords
- phase
- line pole
- line electrode
- emitting diode
- socket
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention provides a single-phase socket capable of detecting wiring. The single-phase socket capable of detecting wiring comprises a phase line electrode L, a null line electrode N, an earth line electrode E and a detection circuit. The detection circuit comprises three light-emitting diodes, three current-limiting resistors and a normally-open contact button. One light-emitting diode and one current-limiting resistor are connected in series between the phase line electrode L and the null line electrode N in sequence. One light-emitting diode and one current-limiting resistor are connected in series between the null line electrode N and the earth line electrode E in sequence. One side, close to the phase line electrode L, of the light-emitting diode which is connected in series between the phase line electrode L and the null line electrode N is provided with a node A. The normally-open contact button (3) is arranged between the phase line electrode L and the node A. The earth line electrode E is connected with the phase line electrode L in series sequentially through one current-limiting resistor, one light-emitting diode, the node A and the normally-open contact button (3). By the adoption of the single-phase socket capable of detecting wiring, the type of a wiring error of the socket can be directly judged, and therefore the wiring error of the socket can be accurately and rapidly adjusted.
Description
Technical Field
The invention relates to the technical field of single-phase sockets, in particular to a single-phase socket with a wiring detection function.
Background
With the continuous improvement of daily office conditions and resident living standard, no matter in the office space or resident's family, the installation quantity of electric socket all is more and more. Although the wiring of the electric socket is simple, the socket wiring is mistaken in the installation process due to the large number of the wiring, different quality of installation personnel, low responsibility and the like. According to statistics, the common connection method of the single-phase three-pole socket is about 24, wherein only 1 connection method is correct, and the other 23 connection methods are wrong. The wiring error of the socket not only influences the normal use of the electric equipment, but also easily causes safety accidents such as electric shock and the like to users. At present, the connection detection of the socket needs to be carried out by means of special detection instruments such as plug-type power detectors, multimeters, electropens and other professional equipment, and is not operated by ordinary users.
At present, a single-phase socket and a special socket wiring detection instrument are two independent products, and socket installation and socket wiring detection belong to two processes, so that correct judgment can be performed on socket wiring, but the requirement on the quality of an operator is high, the socket wiring detection instrument is required to be a professional electrician, and the socket needs to be plugged and pulled one by the special detection instrument during detection, so that time and labor are wasted.
In traditional building electrical construction process, electrician not only need purchase dedicated detecting instrument, will measurationing one by one moreover all sockets, both wasted time and energy, increase construction cost again. In the daily life of residents, the sockets are generally replaced by the residents, due to the fact that the harmfulness of wrong wiring of the sockets is not known enough, and no corresponding detection instrument is used for assisting judgment, wrong connection is easy to occur, and meanwhile potential safety hazards are buried for the residents and the electric equipment.
In view of the above, there is a need for an electrical outlet with a function of detecting miswiring, so that an operator or user can immediately handle the miswired outlet and prevent the miswired outlet from occurring.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a single-phase outlet having a function of detecting wiring. The electric socket can be widely applied to building electrical installation or daily household transformation, can prevent the occurrence of electrical socket wiring errors, and has the characteristics of simplicity, intuition, easy judgment, time saving and labor saving.
According to the present invention, there is provided a single-phase socket having a function of detecting a connection, comprising: the method comprises the following steps: a phase line pole L, a zero line pole N, a ground line pole E and a detection circuit; wherein, detection circuitry includes: three light emitting diodes, three current limiting resistors and a normally open contact button; a light emitting diode and a current limiting resistor are respectively connected in series between the phase line pole L and the zero line pole N and between the zero line pole N and the ground line pole E in sequence; a node A is arranged on one side, close to the phase line pole L, of the light-emitting diode connected in series between the phase line pole L and the zero line pole N, and the normally open contact button is arranged between the phase line pole L and the node A; and the ground wire electrode E is connected with the phase wire electrode L in series through a current-limiting resistor and a light-emitting diode, and the node A and the normally open contact.
In addition, the preferable scheme is that the light emitting diodes between the phase line pole L and the zero line pole N are connected in series in the forward direction, the light emitting diodes between the ground line pole E and the phase line pole L are connected in series in the forward direction, and the light emitting diodes between the zero line pole N and the ground line pole E are connected in series in the forward direction.
By utilizing the single-phase socket with the wiring detection function, the type of the wiring error of the socket can be directly judged, so that the wiring error of the socket can be correctly and quickly adjusted. In addition, in the wiring detection process, special detection instruments such as a plug-type power supply detector, a universal meter and an electroprobe are not needed, and the detection device has the advantages of intuition, convenience and high detection efficiency.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic diagram of an internal connection detection circuit of a single-phase receptacle with connection detection according to the present invention; and
fig. 2 is a schematic external view showing a panel appearance of a single-phase outlet with a connection detecting function according to the present invention.
Wherein the reference numerals include: the circuit comprises current-limiting resistors 1, 5 and 6, light- emitting diodes 2, 4 and 8, a normally open contact button 3, a node A, a socket panel 7, a ground wire pole E, a phase wire pole L and a zero line pole N.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram showing an internal connection detection circuit of a single-phase socket having a connection detection function according to the present invention.
As shown in fig. 1, the single-phase socket with the function of detecting the connection provided by the invention comprises a phase line pole L, a zero line pole N, a ground line pole E and a detection circuit; the detection circuit comprises three light-emitting diodes, three current-limiting resistors and a normally-open contact button 3. Specifically, a light emitting diode 2 and a current limiting resistor 1 are sequentially connected in series between a phase line pole L and a zero line pole N; the current limiting resistor 5 and the light emitting diode 4 are sequentially connected in series between the ground wire electrode E and the phase wire electrode L; the light emitting diode 8 and the current limiting resistor 6 are sequentially connected in series between the zero line pole N and the ground wire pole E.
As can be seen from the circuit shown in fig. 1, the light emitting diode 2, the current limiting resistor 1, the light emitting diode 8, the current limiting resistor 6, the current limiting resistor 5 and the light emitting diode 4 are sequentially connected in series to form a loop. And, set up a node A between two adjacent luminescent diodes 4, 2, set up the normally open contact button 3 between phase line pole L and node A. The node a may be located at any position between the light emitting diode between the phase line pole L and the ground line pole E and the light emitting diode between the phase line pole L and the zero line pole N.
In order to detect the wiring state and the error line, the light emitting diode 2 is connected in series in the forward direction in a circuit between a phase electrode L and a zero line electrode N, the light emitting diode 4 is connected in series in the forward direction in a circuit between a ground electrode E and the phase electrode L, and the light emitting diode 8 is connected in series in the forward direction in a circuit between the zero line electrode N and the ground electrode E.
The zero line pole N is grounded at the power supply end of a power plant, a transformer substation or a transformer, and is a working grounding line pole. The zero line pole N does not form a loop with the transmission line, and generally has no current, and the ground line pole E is grounded at a user end and is connected with a metal shell of an electric appliance or a human body contactable part, so that the shell is equipotential with the ground, and the human body is protected from electric shock. The phase pole L is also called live line, and forms a power supply loop together with the zero line pole N. Normally, the live wire is generally 220V for household or 36V for industry, and the neutral wire pole N has no voltage. The following is a judgment made based on the relationship of the potentials of the respective line ends.
Firstly, electrifying all installed sockets;
then, the wiring state and the wrong line are judged according to the switch of the normally open contact button 3 and the light emitting condition of each light emitting diode. The specific classification is as follows:
1. when the socket is powered on and the normally open contact button 3 is not closed,
if the light emitting diode 8 is illuminated, there are two results. Firstly, connecting a phase line pole and a zero line pole reversely; ② the earth electrode is electrified. At this time, the normally open contact button 3 can be pressed to a closed state, if the light emitting diodes 2 are simultaneously lighted, the fault is that the phase line pole and the zero line pole are reversely connected, and if only the light emitting diode 8 is still lighted, the fault is that the ground line pole is electrified.
2. When the socket is powered on and the normally open contact button is closed,
firstly, if the light-emitting diodes 2 and 4 are lighted at the same time, the socket is correctly wired;
if only the light-emitting diode 2 is lighted, the ground electrode E is cut off;
if only the light-emitting diode 4 is lighted, the zero line pole N is lacked;
if the light- emitting diodes 2 and 8 are lighted at the same time, the phase line pole L and the zero line pole N are connected in a reverse way;
if the light- emitting diodes 4 and 8 are lighted at the same time, the phase line pole L and the ground line pole E are reversely connected;
and sixthly, if the light-emitting diodes 2, 4 and 8 do not shine, the phase-lacking line pole L is formed.
Fig. 2 shows a panel appearance of a single-phase outlet with a wire connection detecting function according to the present invention.
As shown in fig. 2, the light emitting diodes 2, 4, 8 and the normally open contact button 3 are arranged on the surface of the socket panel 7 in the manner shown in fig. 2, and a user can judge the type of the wrong wiring of the socket according to the on-off state of the light emitting diodes 2, 4, 8 with reference to the product use instruction, so as to perform correct wiring adjustment.
Finally, after the socket is correctly wired, the user presses the contact button 3 to a normally open state to cut off the internal wiring detection circuit of the socket.
The single-phase socket with the phase detection wiring function can directly judge the wiring error type of the socket through the on-off states of the three light-emitting diodes of the socket panel under the condition of power receiving, thereby carrying out correct and quick adjustment. The device can be used for professional installers and common user groups, and has low requirements on the quality of operators. And special detecting instruments such as a plug-type power supply detector, a universal meter, an electroprobe and the like are not needed, and the device has the advantages of intuition, convenience and high detecting efficiency.
In addition, after the socket wiring detection and adjustment are completed, a user can press the contact button 3 to be in a normally open state, and the socket internal wiring detection circuit is cut off, so that electricity is saved.
The invention aims to provide a single-phase socket with a wiring detection function for the field, and the single-phase socket is additionally provided with a wiring detection circuit in the single-phase socket on the premise of meeting the basic use function of the single-phase socket, so that the internal wiring condition is simply and intuitively embodied, and the socket with a wrong wiring is conveniently readjusted.
The single-phase outlet having the function of detecting the wiring according to the present invention is described above by way of example with reference to fig. 1 and 2. However, it will be appreciated by those skilled in the art that various modifications can be made to the single-phase socket with the function of detecting the connection of the wires, which is proposed by the present invention, without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (2)
1. A single-phase outlet with a function of detecting wiring, comprising: a phase line pole L, a zero line pole N, a ground line pole E and a detection circuit; wherein,
the detection circuit includes: three light-emitting diodes (2, 4, 8), three current-limiting resistors (1, 5, 6) and a normally open contact button (3); and,
a light emitting diode and a current limiting resistor are respectively connected in series between the phase line pole L and the zero line pole N and between the zero line pole N and the ground line pole E in sequence;
a node A is arranged on one side, close to the phase line pole L, of the light-emitting diode connected in series between the phase line pole L and the zero line pole N, and the normally-open contact button (3) is arranged between the phase line pole L and the node A;
and the ground wire pole E is connected with the phase wire pole L in series through a current-limiting resistor, a light-emitting diode, the node A and the normally open contact (3) in sequence.
2. The single-phase socket with the detection wiring function according to claim 1, wherein the light emitting diode (2) between the phase line pole L and the zero line pole N is connected in series in a forward direction, the light emitting diode (4) between the ground line pole E and the phase line pole L is connected in series in a forward direction, and the light emitting diode (8) between the zero line pole N and the ground line pole E is connected in series in a forward direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310520003.3A CN103543382A (en) | 2013-10-29 | 2013-10-29 | Single-phase socket capable of detecting wiring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310520003.3A CN103543382A (en) | 2013-10-29 | 2013-10-29 | Single-phase socket capable of detecting wiring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103543382A true CN103543382A (en) | 2014-01-29 |
Family
ID=49967014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310520003.3A Pending CN103543382A (en) | 2013-10-29 | 2013-10-29 | Single-phase socket capable of detecting wiring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103543382A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877286A (en) * | 2017-03-28 | 2017-06-20 | 广东万家乐燃气具有限公司 | Power line is protected in a kind of leakage of charged Check up polarity |
| CN112582854A (en) * | 2020-11-04 | 2021-03-30 | 国网浙江省电力有限公司金华供电公司 | Intelligent grounding wire clamp misoperation prevention device |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210630U (en) * | 1986-12-24 | 1987-09-02 | 广东省中山市黄圃镇微型电机厂 | Plug with leakage indicator |
| CN2082422U (en) * | 1990-12-22 | 1991-08-07 | 上海第四建筑服务公司 | Connection state testing device of single-phase three-pole socket |
| CN2090066U (en) * | 1991-01-16 | 1991-12-04 | 洪度正 | Socket line checking instrument |
| CN2103819U (en) * | 1991-09-28 | 1992-05-06 | 上海金山工业设备安装联营公司 | Tester for single-phase three-hole socket |
| CN2132302Y (en) * | 1992-09-12 | 1993-05-05 | 福建省第四建筑工程公司 | Electricity tester for single-phase three-hole socket |
| AU639880B1 (en) * | 1992-09-29 | 1993-08-05 | ||
| CN2187313Y (en) * | 1994-01-12 | 1995-01-11 | 王来法 | Safety power supply detector |
| CN2197676Y (en) * | 1993-09-14 | 1995-05-17 | 吴延明 | Sounding plug tester |
| CN2216298Y (en) * | 1994-11-12 | 1995-12-27 | 滕洪福 | Outlet (plug) |
| EP0715172A1 (en) * | 1994-12-01 | 1996-06-05 | Societe Anonyme Des Ets Catu | Testing device for earthed wall socket |
| CN2258281Y (en) * | 1996-04-02 | 1997-07-23 | 张文生 | Residential electrical equipment detector |
| CN2279714Y (en) * | 1996-11-01 | 1998-04-22 | 李曙光 | Safety grounding power socket with monitoring device |
| JP2000180492A (en) * | 1998-12-18 | 2000-06-30 | Matsushita Electric Works Ltd | Plug socket checker |
| CN2417481Y (en) * | 2000-03-29 | 2001-01-31 | 广州市电筒工业公司 | Arrangement for testing single phase socket connection and leakage of switch |
| US6323652B1 (en) * | 1997-10-17 | 2001-11-27 | Stephen D. Collier | Electrical testing device |
| CN2509588Y (en) * | 2001-10-11 | 2002-09-04 | 虞幸福 | Domestic power source socket wiring testing device |
| CN1800870A (en) * | 2006-01-10 | 2006-07-12 | 刘锦泰 | Single-phase plug type power supply detector |
| CN2891381Y (en) * | 2006-03-30 | 2007-04-18 | 张敬云 | Receptacle with electrical leakage indication function |
| CN200969454Y (en) * | 2006-05-06 | 2007-10-31 | 芦国芳 | Household electrical appliance creepage acousto-optic alarm wall socket |
| CN201255758Y (en) * | 2008-08-15 | 2009-06-10 | 虞幸福 | Single phase AC power socket circuit detecting device |
| CN201278011Y (en) * | 2008-10-24 | 2009-07-22 | 上海天泉建筑装饰工程有限公司 | Electric power socket tester |
| CN202434818U (en) * | 2012-02-20 | 2012-09-12 | 慈溪冬宫电器有限公司 | Power socket with electric leakage alarming function |
| CN202563045U (en) * | 2012-05-28 | 2012-11-28 | 李宗跃 | Right-or-wrong judgment display for wiring of indoor single-phase three-hole socket |
| CN202975234U (en) * | 2012-08-29 | 2013-06-05 | 郭胜利 | Power socket detector |
-
2013
- 2013-10-29 CN CN201310520003.3A patent/CN103543382A/en active Pending
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210630U (en) * | 1986-12-24 | 1987-09-02 | 广东省中山市黄圃镇微型电机厂 | Plug with leakage indicator |
| CN2082422U (en) * | 1990-12-22 | 1991-08-07 | 上海第四建筑服务公司 | Connection state testing device of single-phase three-pole socket |
| CN2090066U (en) * | 1991-01-16 | 1991-12-04 | 洪度正 | Socket line checking instrument |
| CN2103819U (en) * | 1991-09-28 | 1992-05-06 | 上海金山工业设备安装联营公司 | Tester for single-phase three-hole socket |
| CN2132302Y (en) * | 1992-09-12 | 1993-05-05 | 福建省第四建筑工程公司 | Electricity tester for single-phase three-hole socket |
| AU639880B1 (en) * | 1992-09-29 | 1993-08-05 | ||
| CN2197676Y (en) * | 1993-09-14 | 1995-05-17 | 吴延明 | Sounding plug tester |
| CN2187313Y (en) * | 1994-01-12 | 1995-01-11 | 王来法 | Safety power supply detector |
| CN2216298Y (en) * | 1994-11-12 | 1995-12-27 | 滕洪福 | Outlet (plug) |
| EP0715172A1 (en) * | 1994-12-01 | 1996-06-05 | Societe Anonyme Des Ets Catu | Testing device for earthed wall socket |
| CN2258281Y (en) * | 1996-04-02 | 1997-07-23 | 张文生 | Residential electrical equipment detector |
| CN2279714Y (en) * | 1996-11-01 | 1998-04-22 | 李曙光 | Safety grounding power socket with monitoring device |
| US6323652B1 (en) * | 1997-10-17 | 2001-11-27 | Stephen D. Collier | Electrical testing device |
| JP2000180492A (en) * | 1998-12-18 | 2000-06-30 | Matsushita Electric Works Ltd | Plug socket checker |
| CN2417481Y (en) * | 2000-03-29 | 2001-01-31 | 广州市电筒工业公司 | Arrangement for testing single phase socket connection and leakage of switch |
| CN2509588Y (en) * | 2001-10-11 | 2002-09-04 | 虞幸福 | Domestic power source socket wiring testing device |
| CN1800870A (en) * | 2006-01-10 | 2006-07-12 | 刘锦泰 | Single-phase plug type power supply detector |
| CN2891381Y (en) * | 2006-03-30 | 2007-04-18 | 张敬云 | Receptacle with electrical leakage indication function |
| CN200969454Y (en) * | 2006-05-06 | 2007-10-31 | 芦国芳 | Household electrical appliance creepage acousto-optic alarm wall socket |
| CN201255758Y (en) * | 2008-08-15 | 2009-06-10 | 虞幸福 | Single phase AC power socket circuit detecting device |
| CN201278011Y (en) * | 2008-10-24 | 2009-07-22 | 上海天泉建筑装饰工程有限公司 | Electric power socket tester |
| CN202434818U (en) * | 2012-02-20 | 2012-09-12 | 慈溪冬宫电器有限公司 | Power socket with electric leakage alarming function |
| CN202563045U (en) * | 2012-05-28 | 2012-11-28 | 李宗跃 | Right-or-wrong judgment display for wiring of indoor single-phase three-hole socket |
| CN202975234U (en) * | 2012-08-29 | 2013-06-05 | 郭胜利 | Power socket detector |
Non-Patent Citations (1)
| Title |
|---|
| 王常余: "安装后的单相插座接线检查方法", 《电世界》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877286A (en) * | 2017-03-28 | 2017-06-20 | 广东万家乐燃气具有限公司 | Power line is protected in a kind of leakage of charged Check up polarity |
| CN112582854A (en) * | 2020-11-04 | 2021-03-30 | 国网浙江省电力有限公司金华供电公司 | Intelligent grounding wire clamp misoperation prevention device |
| CN112582854B (en) * | 2020-11-04 | 2022-05-31 | 国网浙江省电力有限公司金华供电公司 | Intelligent grounding wire clamp misoperation prevention device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10627454B2 (en) | Grounding wire detection circuit | |
| CN103630734B (en) | A kind of full voltage all-loop self-inspection condensing type electroscope | |
| CN101452035A (en) | Electric appliance earthing status monitoring circuit | |
| CN202975234U (en) | Power socket detector | |
| CN103543382A (en) | Single-phase socket capable of detecting wiring | |
| CN207541476U (en) | One kind carries the external circuit breaker control circuit of combined floodgate detection function electric energy meter | |
| CN203365531U (en) | Novel alternating-current and direct-current high-voltage electroscope | |
| CN204794018U (en) | Microcomputer protection, measurement, and control device | |
| CN203813141U (en) | Capacitor step-down energy-saving faulted neutral line protection and grounding universal self-checking connector assembly | |
| CN213905748U (en) | Plug-and-play power consumption protection device and socket electric appliance | |
| CN202494714U (en) | Novel electroscope | |
| CN203858285U (en) | Full-voltage full-loop self-checking capacitive type electroscope | |
| CN203275565U (en) | Multifunctional grounding detector | |
| CN211239315U (en) | Leakage protection circuit based on three-pole disconnection | |
| CN206818792U (en) | Low voltage motor insulating resistor detecting circuit | |
| CN102412555A (en) | Novel grounding fault protection electrical apparatus release | |
| CN112147538A (en) | Equipment poor grounding alarm circuit, poor grounding alarm device and switch device | |
| CN203688712U (en) | Low-voltage power distribution branch identification device | |
| CN201673198U (en) | Test pencil with illumination function | |
| CN106483349B (en) | A kind of mutual inductor secondary side earthing detection protection system | |
| CN204086447U (en) | Civilian electricity security protection detector | |
| CN203616420U (en) | Safety grounding universal on-line detector | |
| CN102957100A (en) | Power supply changeover box | |
| CN201656152U (en) | Safety socket | |
| KR101822620B1 (en) | Ground check apparatus for concent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140129 |