CN2466818Y - Single-phase three-pin safety socket - Google Patents
Single-phase three-pin safety socket Download PDFInfo
- Publication number
- CN2466818Y CN2466818Y CN 00240509 CN00240509U CN2466818Y CN 2466818 Y CN2466818 Y CN 2466818Y CN 00240509 CN00240509 CN 00240509 CN 00240509 U CN00240509 U CN 00240509U CN 2466818 Y CN2466818 Y CN 2466818Y
- Authority
- CN
- China
- Prior art keywords
- phase
- terminal
- safety socket
- indicating device
- earth terminal
- 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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- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The utility model relates to a single-phase three-hole safety socket. A safety alarm circuit composed of the connection in series of a current-limiting resistor and an LED is additionally arranged between an earth terminal and a middle line terminal of the existing single-phase three-hole socket; the problem that the leakage current of a domestic electric appliance damaging people possibly occurs when the existing single-phase three-hole socket is applied in a power supply system with a suspended earth wire is solved. Simultaneously, the utility model can conveniently display out the size of the leakage current. The utility model has the advantages of simple structure, low cost, safety and convenience.
Description
The utility model relates to a kind of socket, especially a kind of single-phase two hole safety sockets.
In the prior art, the single-phase three-hole socket by the insulating panel that isosceles triangle distribution jack is arranged, insulation shell, be installed in the housing and corresponding to three metal coupling assemblings of position of opening on the panel: fire line terminal, neutral terminal and earth terminal.Described metal coupling assembling can well be connected with the external power line in inserting housing, can well be connected with the latch of the plug that inserts corresponding jack again simultaneously.Single-phase three-hole socket of the prior art has fixed and portable two kinds, mainly is applicable to the indoor power-supply system that is connected to earth connection, the power connector of the general household electrical appliance of Chang Zuowei.The effect of its earth terminal is the leakage current on its metal shell that household electrical appliance may occur is flowed into the earth by earth connection, and with assurance user's personal safety, yet it can not help people that household electrical appliance electric leakage degree is had gained some understanding.In addition, the prerequisite that earth terminal plays a role in this socket must be exist in the external power system earth connection and with the good conducting of the earth.Yet, in the indoor external power system of China, the situation of no earth connection is but occupied suitable ratio, it is quite extensive to distribute, at this moment, the earth terminal of single-phase three-hole socket is in fact vacant, and the leakage current on the household appliance shell just can't be derived, household electrical appliance metal shell surface charging, very dangerous.To this, correct solution is, mend and connect earth connection, but in fact owing to mend that to connect earth connection inconvenient or have any problem concerning most of users, most of users are lucky mostly to be used, and usually causes the generation of accident thus.
The utility model aim to provide a kind of can the single-phase three-hole safety socket of safe and applicable in the external power system of no earth connection.
The utility model is following solution:
The utility model comprises by the insulating panel that isosceles triangle distribution jack is arranged, insulation shell, is installed in the housing and corresponding to three metal coupling assemblings of position of opening on the panel: fire line terminal, neutral terminal and earth terminal.Described metal coupling assembling can well be connected with the external power line in inserting housing, can well be connected with the latch of the plug that inserts corresponding jack again simultaneously, it is characterized in that described earth terminal well is connected with neutral terminal by a resistance that is placed in the housing.
Above-mentioned technical solution makes the leakage current that may exist on the household appliance shell can pass through earth terminal, resistance, neutral terminal successively and flows into center line, thereby guarantee user's safety.
Further purpose is to provide a kind of above-mentioned single-phase three-hole safety socket that has alarm function.
Its technical solution is as follows:
Keep the structure of above-mentioned single-phase three-hole safety socket constant, also have a signal of telecommunication indicating device well to be connected between earth terminal and neutral terminal.
Above-mentioned signal of telecommunication indicating device can be by the visible photoelectricity indicating device of panel, as light-emitting diode, neon lamp, can be electroacoustic device also, as buzzer.
Above-mentioned signal of telecommunication indicating device can be in parallel with resistance, also can be connected between earth terminal and neutral terminal after resistance is connected, can also connect with a current-limiting resistance more earlier with after the shunt resistance parallel connection, and be connected between earth terminal and neutral terminal.
Select the index signal power signal of telecommunication indicator elment comparatively responsive for use, then can indicate the size of leakage current easily the current value size.
Adopt the utility model of further technical solution simple in structure, easily and effectively.
Below with reference to drawings and Examples the utility model is further described:
Accompanying drawing 1 is the schematic diagram of the utility model embodiment.
Each sequence number is respectively among the figure: 1, housing; 2, neutral terminal; 3, current-limiting resistance; 4, light-emitting diode; 5, shunt resistance; 6, earth terminal; 7, fire line terminal; 8, panel.
As shown in Figure 1, the utility model embodiment comprises by the insulating panel that isosceles triangle distribution jack is arranged (8), insulation shell (1), be installed in the housing (1) and corresponding to three metal coupling assemblings of position of opening on the panel: fire line terminal (7), neutral terminal (2) and earth terminal (6), described terminal is a metal spring leaf, they all can well be connected with the external power line in inserting housing, can clamp the latch of the plug that inserts corresponding jack simultaneously again.It also comprises the circuit that is formed in parallel by light-emitting diode (4) and shunt resistance (5) by current-limiting resistance (3) series connection, and is connected between neutral terminal (2) and earth terminal (6).Light-emitting diode (4) is loaded on the panel, plays signal of telecommunication indicative function, is used to indicate the size of leakage current.Its bright intensity indicates the size of leakage current.
Special needs to be pointed out is that fire line terminal of the present utility model and neutral terminal must not connect instead, connection the utility model should be undertaken by electrician or those of ordinary skills.
Claims (7)
1, a kind of single-phase three-hole safety socket, comprise isosceles triangle distribution jack insulating panel, insulation shell, be installed in the housing and corresponding to three metal coupling assemblings of position of opening on the panel: fire line terminal, neutral terminal and earth terminal, described metal coupling assembling can well be connected with the external power line in inserting housing, can well be connected with the latch of the plug that inserts corresponding jack again simultaneously, it is characterized in that: described earth terminal well is connected with neutral terminal by a resistance that is placed in the housing.
2, a kind of single-phase three-hole safety socket according to claim 1 is characterized in that: also have a signal of telecommunication indicating device well to be connected between earth terminal and neutral terminal.
3, a kind of single-phase three-hole safety socket according to claim 2 is characterized in that: described signal of telecommunication indicating device is by the visible photoelectricity indicating device of panel.
4, a kind of single-phase three-hole safety socket according to claim 2, it is characterized in that: described signal of telecommunication indicating device is an electroacoustic device.
5, a kind of single-phase three-hole safety socket according to claim 2 is characterized in that: described signal of telecommunication indicating device be connected between earth terminal and neutral terminal after current-limiting resistance is connected.
6, a kind of single-phase three-hole safety socket according to claim 2 is characterized in that: described signal of telecommunication indicating device be connected between earth terminal and neutral terminal after shunt resistance is in parallel.
7, a kind of single-phase three-hole safety socket according to claim 2 is characterized in that: connect with current-limiting resistance after described signal of telecommunication indicating device and the shunt resistance parallel connection again and be connected between earth terminal and neutral terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00240509 CN2466818Y (en) | 2000-09-30 | 2000-09-30 | Single-phase three-pin safety socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00240509 CN2466818Y (en) | 2000-09-30 | 2000-09-30 | Single-phase three-pin safety socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2466818Y true CN2466818Y (en) | 2001-12-19 |
Family
ID=33601140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00240509 Expired - Fee Related CN2466818Y (en) | 2000-09-30 | 2000-09-30 | Single-phase three-pin safety socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2466818Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666842B (en) * | 2008-09-03 | 2011-06-29 | 神讯电脑(昆山)有限公司 | Common-ground warning indicator |
| CN102957053A (en) * | 2011-08-22 | 2013-03-06 | 索尼公司 | Connection jack and electronic apparatus |
-
2000
- 2000-09-30 CN CN 00240509 patent/CN2466818Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666842B (en) * | 2008-09-03 | 2011-06-29 | 神讯电脑(昆山)有限公司 | Common-ground warning indicator |
| CN102957053A (en) * | 2011-08-22 | 2013-03-06 | 索尼公司 | Connection jack and electronic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |