CN1571222A

CN1571222A - Safety electrical connector

Info

Publication number: CN1571222A
Application number: CN 200410018342
Authority: CN
Inventors: 杨宁恩
Original assignee: 杨宁恩
Current assignee: Ningbo Sunlight Electrical Appliance Co., Ltd.
Priority date: 2004-05-13
Filing date: 2004-05-13
Publication date: 2005-01-26
Anticipated expiration: 2024-05-13
Also published as: CN1315231C

Abstract

The invention is a safety electrical connector, including connection head and connection seat, where there is a circular grounding end and a grounding column arranged in the connection seat, there are electric contact pieces arranged on the connection head, there is an isolating ring arranged between each pair of electric contact points in the connection head, a spacer is arranged in the isolating ring; the displacement of the isolating ring is under the control of that of the spacer and that of the spacer is controlled by that of the grounding column. The invention has a fully sealed structure, each pair of electric contact points is sealed and isolated before reaching the position as inserted, the spacer is controlled by the grounding stick and adopts an interlinked locked structure and simultaneously in structure, it assures only when the grounding wire is contacted can other contact points be closed, thus radically, avoiding hidden trouble of creepage of other components of electric appliance. In addition, it also designs two draining direct current channels to prevent accident hidden trouble of overturn and leakage.

Description

The secured electrical connector

Technical field

The present invention relates to a kind of power connector spare, particularly about the domestic electric heating container connector of electric cup or electric kettle heating power supply for example.

Background technology

The electric heating connector of existing domestic electric heating container generally comprises plug and socket, the family expenses electric-heating container of live line not, custom is called wireless electric connector, for separating never live line and problem safe in utilization, this electric connector is constantly improved, cordless electric appliance and the joint patent thereof that proposes as CN1056474C wherein, it is a kind of connector that can directly see power supply phase line contact, the user is not if note, use the conductive materials mistake to bump the conductive body that inserts between the power supply phase line, electric shock accidents will take place, thereby jeopardizes personal safety.CN2422757Y proposes a kind of electrical cnnector patent above-mentioned said cordless electric appliance joint is transformed; make it under normal circumstances to see power supply phase line contact connector; and it is isolated with the insulation ring set between each phase line contact sets; and the zero potential contact is between live wire and the ground wire; its insulation shielding further improves; but still there is a potential safety hazard; for example plug is not with receptacle accepts the time; the insulation ring set is squeezed and can makes the insulation blocking of respectively organizing contact disengaging insulation ring set and cause electric shock accidents from line displacement.Still there are a lot of products also to have problems in addition and can't pass through the international electrical engineering standard requirement of (IEC is about connecting the test that pedestal drips salt solution).

Summary of the invention

The objective of the invention is at the existing potential safety hazard of above-mentioned cordless electric appliance joint and do not reach problem such as international electrical engineering standard (IEC) requirements, design a kind of do not have potential safety hazard and wireless secured electrical connector that can the requirement of mistake international electrical engineering standard.

Design of the present invention is, the secured electrical connector, comprise connector and supporting Connection Block, be provided with in the Connection Block by the inside and outside wall and the middle insulating barrier of conduction and form the annulus power connection end and be in the middle earthing rod of Connection Block, connector is provided with the electric contact piece that engages with each power connection end of described Connection Block, it is characterized in that each is to being provided with cage ring in the connector between the electric contact, stop is located in the cage ring; The displacement of described cage ring is subjected to the control of stop displacement, and the displacement of described stop is subjected to the control of earthing rod displacement.

Above-mentioned design has mainly been set up the cage ring stopping means except original structure, make it can't press cage ring when not working, and has avoided power contact to expose fully.Simultaneously cage ring has been carried out architecture advances, made it, changed into and make water by the cage ring requirement cage ring of flowing through to original prevention water enters the position, contact, and without the power contact position.Its architectural feature has mainly embodied aspect two.One, the stopping means of forming by plug body, earthing rod contact chip, position limiting slide block, limit spring that cage ring is carried out spacing control, position limiting slide block can slide at connector body earthing rod patchhole head, wherein intracardiac side and earthing rod are collided, lateral surface and positive stop spring plate are the state of suppressing, and it is final spacing control point that there is a plush copper of outwards protruding in another head end outside of spacing sliding sash.The insertion of earthing rod can make this spacing control point move.They are two years old, limited, the sluicing and the contact isolation structure that become by connector body, cage ring, cage ring compression spring set, cage ring after the improvement is different fully with former cage ring, and four porus excretoriuses that catchment are arranged in two layers of cage ring, and porus excretorius directly inserts the external drain site of connector body.The Internal and external cycle top edge has miter angle to the centroclinal chamfering of circle wall, and inclined-plane, cage ring top matches with the chamfering of plug body when not working, and the contact is isolated in the connector body, will jeopardize the water face that forecloses of connector simultaneously and drain.It is limited control point that the upper inner of cage ring has a boss, and the bayonet lock with position limiting slide block holds mutually is the stop bit shape when not working, and makes the cage ring can't be toward lower slider.

The distinguishing feature of above-mentioned design is to have used a chain of self-locking structure when Connection Block and connector do not patch, each electrical pickoff on the connector is isolated by the cage ring safe insulation, cage ring is because the position-limiting action of stop, can displacement because of being squeezed, and stop generally can not be squeezed yet and move, when having only connector and Connection Block to patch mutually, earth terminal extruding between Connection Block is located at the stop in the cage ring, this moment the stop lateral displacement, open the bayonet lock of cage ring length travel, if Connection Block and connector are separated, then stop is replied the home position, cage ring also resets, and is in a chain of self-locking state.The a chain of auto-lock function of this kind can be got rid of the existence of electric shock hidden danger fully, even child or know-nothing insert conductive metal substrate in the connector, can not touch the electric contact in charged source, because before the contact electric contact, be provided with and only insert " door " that earth terminal just can be opened in centre bore, this has just fundamentally been avoided the generation of electric shock accidents.Designed the necessary earth terminal order of contact earlier from structure, do not inserted earlier at earth terminal, it is impossible thinking to insert separately the phase line electric contact, thus avoid fully since electrical equipment other partly leak electricity and wait the generation of initiation security incident.

Description of drawings

Fig. 1 is connector, Connection Block vertical sectional view, and Fig. 1-a is the Connection Block transverse vertical section, and Fig. 1-b is the connector transverse vertical section, and Fig. 1-c is that connector is vertically vertically analysed and observe.

Fig. 2 is that connector, Connection Block partly patch cutaway view, and Fig. 2-b is for laterally vertically analysing and observe, and Fig. 2-c is for vertically vertically analysing and observe.

Fig. 3 is the breaking piece vertical sectional view, and Fig. 3-b is for laterally vertically analysing and observe, and Fig. 3-c is for vertically vertically analysing and observe.

Fig. 4 is the safety plug horizontal cross, and Fig. 4-1 is the A-A cross section view of Fig. 1-b, and Fig. 4-2 is the B-B cross section view of Fig. 3-b.

Fig. 5 is the laterally vertical cross-sectional schematic of cage ring.

Fig. 6 is spacing framework schematic perspective view.

Fig. 7 is a safety plug partial structure schematic perspective view.

Among the above-mentioned figure, 1 is interior brace, and 2 is earthing rod, 3 is outer brace, and 4 is dead ring, and 5 is outer conducting ring, 6 is interior conducting ring, and 7 is cage ring, and 8 is plug body, 9 is helical spring, and 10 is interior contact, and 11 is outer contact, 12 is grounding wafer, and 13 is guide collar, and 14 is the guide collar centre bore, 15 is positive stop spring plate, 16 is the plug body center cavity, and 17 is plug body annulus chamber, and 18 is spacing sliding sash, 19 is top bevel, cage ring outer ring, 20 is cage ring inner ring top bevel, and 21 is spacing sliding sash plush copper, and 22 is tangential projection, 23 is the cage ring spilled water hole, 24 is inclined-plane in the limitting casing, and 25 is spacing sliding sash base plate, and 26 is spring eye, 27 is cage ring sluicing groove, and 28 is urocoel in the cage ring.

Embodiment

The safety electrical cnnector is patched mutually by the Connection Block of the connector of live line and non-live line to be formed.Be located under the kettle as the plug of electric kettle, during heating the socket at the bottom of the kettle being aimed at plug connects, when patching as shown in Figure 1, contact 10 and outer contact 11 in not comprising in the connector body 8, cage ring 7 and guide collar 13 with interior contact 10 with outer contact 11 encirclements and keep apart (Fig. 1-b).Guide collar 13 is located at the upper end of cage ring 7, and its centre bore 14 opens and be corresponding with the earthing rod 2 at Connection Block center, and the looping pit of guide collar is corresponding with the dead ring 4 on the Connection Block.Cage ring 7 intermediate lateral are shelved

stop

18,25 by grounding wafer 12 and positive stop spring plate 15 two sides clampings (Fig. 1-c) at the bottom of the frame of this stop, stop is by rectangular frame 18, the positive stop spring plate 15 on the projection 21 holding frame bases of framework head end and grounding wafer 12 are formed, and are resilient clamp (shown in Fig. 2-c and Fig. 3-c).The limitting casing base is that other three limits of square column are intilted inclined-plane 24 (see figure 6)s, cage ring 7 be more than 2 layers or 2 layers between the concentric circles insulation circular layer bottom link to each other, and have 4 porus excretorius 23 inner ring tops of catchmenting and be provided with tangential projection 22, the bottom, outer ring is provided with axle spring 9 (Fig. 5).

It is right not join at connector and Connection Block, connector has 2 sluicing through holes, first annular drainage gallery such as Fig. 1-b Fig. 1-c and shown in Figure 5, guide collar 13 cannelures communicate with the cage ring cannelure 27 and the porus excretorius 23 that catchments, it two is as the straight-through urocoel 28 direct drainings in cage ring of the centre bore 14 of Fig. 1-c and guide collar shown in Figure 5, prevent to infiltrate electric contact, simultaneously because 22 edges, top, outer ring of cage ring 7 are the chamferings of inwardly keeping away 45 degree, inner ring 21 top edge are the chamferings to collar wall inclination 45 degree, above-mentioned chamfering seals without flexible glue to the corresponding formation nature of the chamfering of declivity sealing state with guide collar again, be provided with 4 porus excretoriuses 23 that catchment between the Internal and external cycle of cage ring 7 simultaneously, and corresponding with the position of guide collar 13 receiving socket rings 4.The annulus hole is corresponding with the discharge orifice 27 between cage ring 7 ectonexines in the guide collar 13, forms the sluicing direct current channel.Pressing international electrical engineering standard IEC experiment, salt solution can be drained by the passage of said structure, all discharges outside the connector, can stand the test of international standard experiment.

When connector connects at folder, as shown in Figure 1, Connection Block and connector are separated, the connector compression spring 9 of this moment loosens fully and pops up, cage ring 7 is withstood on guide collar 13 and the plug body 8, limitting casing 18 is inserted under the cage ring 7 spacing points by the spacing point that suppresses limitting casing 18 of positive stop spring plate 15 simultaneously, use this moment general external force can't make cage ring 7 toward pressing down, because toward pressing down the prevention that is subjected to limitting casing 18 spacing plush coppers 24, outer contact contact 11 and interior contact contact 10, though be subjected to outer the connection to connect suppressing of contact 10 in the contact 11, because stopping of cage ring 7 can't extend into the cage ring outside.At this moment, as inject salt solution on connector, salt solution then can be by shown in Fig. 1-c, current approach center cavity flows out connector, and can not infiltrate phase line and zero line connector in be connected contact and contact, thereby assurance phase line and zero line, phase line and ground wire, between withstand voltage unaffected.

This connector is when inserting, shown in Fig. 2-b and 2-c, Connection Block inserts the first step of connector, ground connection copper post 2 inserts in the guide collar 13 earlier and then inserts limitting casing 18 and grounding wafer 12, this moment, grounding wafer 12 outwards was shifted, promote limitting casing 18 to a side shifting, with positive stop spring plate 15 compressions, the spacing of limitting casing 18 of this moment shunk to the centre under the spacing point of cage ring, limitting casing plush copper 24 is separated with tangential plush copper, make cage ring 7 that a chance to lower slider be arranged, this moment, the outer contact 11 that connects can't not stretch out cage ring 7 with the interior contact contact 10 that is connected because of Connection Block further presses down.Because Connection Block is pressed into connector in the part, top still is covered on the connector, can not have water to enter the inside of connector simultaneously.

The Connection Block of this moment is if continue toward pressing down, as Fig. 3-b, shown in Fig. 3-c, then Connection Block withstands cage ring 7, cage ring 7 bounces back because of limitting casing 18 has been grounded the post extruding, be not subjected to spacing, and then compress the compression spring 9, cage ring 7 descends, the first half of final cage ring 7 moves to inside and outside connection contact contact 10, below 11, the inside and

outside contact contact

10,11 that connects is stretched out beyond the cage ring 7 by inside and outside suppressing of contact, contacts with outer conducting ring 5 to form with interior conducting ring 1 to be electrically connected, and reaches final purpose.When Connection Block is up carried, cage ring 7 effect of spring 9 by compression then can take place to move up, cover

outside contact contact

10,11, cage ring is withstood guide collar 13 and plug body 8, earthing rod 2 breaks away from grounding wafers 12 when carrying on continuing, limitting casing 18 is subjected to suppressing of limit spring 9 and resets, and finally withstands limitting casing 18, and the spacing spacing point cage ring 7 of limitting casing 18 fastens, cage ring 7 is limited in topmost under the cage ring natural form, and finishes the once circulation of plug.

Claims

1, secured electrical connector, comprise connector and supporting Connection Block, be provided with in the Connection Block by the inside and outside wall and the intermediate insulating layer of conduction and form annulus power connection end (5,6) and be in the middle earthing rod (2) of Connection Block, connector is provided with the electric contact piece (10,11) that engages with each power connection end of described Connection Block, it is characterized in that each is to being provided with cage ring (7) in the connector between the electric contact, stop (18) is located in the cage ring; The displacement of described cage ring (7) is subjected to the control of stop (18) displacement, and the displacement of described stop (18) is subjected to the control of earthing rod (2) displacement.

2, secured electrical connector according to claim 1, it is characterized in that cage ring (7) is a concentric turns dead ring more than 2 layers or 2 layers, the bottom is connected between the layer, and establishes 4 porus excretoriuses that catchment (23), inner ring top is provided with tangential projection (22), and the bottom, outer ring is provided with axle spring (9).

3, secured electrical connector according to claim 1, it is characterized in that the projection (21) of described stop (18) by rectangle limitting casing and framework front end, positive stop spring plate (15) and grounding wafer (12) are formed, the plush copper of limitting casing head end (21) holds mutually with the tangential projection of cage ring (22), and limitting casing base plate (25) is resilient clamp by grounding wafer (12) and positive stop spring plate (15).

4, secured electrical connector according to claim 1 and 2 is characterized in that the middle urocoel (28) of the straight-through cage ring (7) of guide collar centre bore (14) on the connector, forms the sluicing direct current channel.

5, secured electrical connector according to claim 1 is characterized in that the cannelure of guide collar (13) communicates with cage ring cannelure (27) and the porus excretorius that catchments (23).

6, secured electrical connector according to claim 1 is characterized in that establishing guide collar (13) on the cage ring (7), and compression spring (9) is established in the lower end.

7, secured electrical connector according to claim 1 and 2 is characterized in that the chamfering of the outer ring top edge (19) of cage ring for 45 degree that tilt to the inner ring wall, and inner ring top edge (20) is the chamferings to collar wall inclination 45 degree.

8, according to claim 1 or 3 described secured electrical connectors, it is characterized in that limitting casing (18) base is a square column, its excess-three limit is intilted inclined-plane (24)