CN2826748Y

CN2826748Y - Electric joint for electric kettle

Info

Publication number: CN2826748Y
Application number: CN 200520111963
Authority: CN
Inventors: 张拯华
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-27
Filing date: 2005-06-27
Publication date: 2006-10-11
Anticipated expiration: 2015-06-27

Abstract

The utility model relates to the improvement of an electric joint for an electric heating kettle, which comprises a positive joint and a negative joint sheathed with the positive joint, wherein a small hole is arranged in the interior center of the positive joint for accommodating earthing connecting terminals on a component of an overheating protecting device, a conducting connection terminal of a phase line L and a conducting connection terminal of a center line N are concentrically arranged outside the small hole, the geometric shape of the conducting connection terminal of a phase line L and the geometric shape of the conducting connection terminal of a center line N are hollow cylinder-shaped, and the conducting connection terminal of a phase line L and the conducting connection terminal of a center line N are isolated by adopting air or other ways. A contacting sleeve is arranged in a pillar of the negative joint, the geometric shape of the inner cross section of the pillar is hollow rectangular. The outside of two long edges of a rectangular hole are respectively provided with an L wafer and an N wafer respectively allocated with the conducting connecting terminal of a phase wire L and the conducting connecting terminal of a center line N in the positive joint. The utility model has the advantages of better contact performance, stable and reliable electric property and safe use. The utility model can also be applied to other equipment such as a cordless electric iron, an electric frying pan, etc.

Description

The electrical connector that electric kettle is used

Technical field

The utility model relates to a kind of electrical connector, relates to a kind of pair of wire connection terminals and dependency structure thereof and particularly relates to contact on L, N binding post in the moving process, eliminates L contact N contact and bumps curved hidden danger.

Background technology

This type of device comprises two parts, and with base configuration and introduce the famale connector that is called of single-phase three utmost point power supplys, socket-connecting with famale connector has the male contact that is called of binding post.

Such as the disclosed a kind of electrical connector of CN2629282Y, its male contact lower end, the phase line L binding post and the center line N binding post of two hollow cylinders owing to will pack into, thereby cause the circular pit that exists inside and outside two herein, cause male contact to be inserted in the famale connector process, the contact of L and N contact end must pass through these inside and outside two circular pits, and just there is L on the male contact and N binding post to have to bump the possibility of L and N contact in the curved famale connector in this.Ground connection binding post on this male contact center is arranged again; its ground connection route will use one around touching cover; a metallic plate on " overtemperature protection system " that could be close to ground connection destination electric hot plate socket-connects; and complicated around touching the cover manufacturing process, two running-ons are crossed pine slightly and are just had the insecure hidden danger of ground connection.

Summary of the invention

In order to solve deficiency of the prior art, the purpose of this utility model provides the electrical connector that a kind of electric kettle that has improved is used, and is to overcome aforesaid problem at least.

Above-mentioned technical problem of the present utility model solves by following technical proposals: two inside-and-outside ring pits of the insulation interlayer lower end in male contact, set up an insulation transition pad, be inserted on the semicircular annular of male contact lower end, adopt ultrasonic wave plastic welding technology that the two is welded, make contact on L and N binding post surface, reach level and smooth when mobile, solved contact and fallen into circular pit and may make contact bump curved problem.

As preferably, the internal diameter  a of described insulation transition pad is greater than about 0.5 millimeter of N binding post internal diameter  d, and external diameter  b is less than about 0.5 millimeter of L binding post external diameter  D.

 3 apertures that the male contact center is provided with; it is the axle shape ground connection binding post that is arranged in this aperture former; change be designed into another " overtemperature protection system " on metallic plate on riveting jail mutually; and this metallic plate is fastening subsides mutually with ground connection destination electric hot plate; then omitted in the former ground connection link around touching cover; make ground connection more reliable, and saved technology complicated around touching the cover part.This shape ground connection binding post is changed the concrete structure that is set on " overtemperature protection system ", and authorizing the application number of dispatch on June 3rd, 2005 is in 2004200088813 description to be arranged.

The contact of the center line N contact in the famale connector is protruding spherical, sphere diameter is N binding post internal diameter  d, the contact of phase line L contact is an indentations, recess arc diameter is about four times of L binding post external diameter  D, be provided with like this contact is contacted with the contacting by a contact and line of inside and outside circle cylinder of N and L binding post, become the face contact, thereby reduced contact resistance.

As preferably, described L contact is riveted with described L conduction inserted sheet and N conduction inserted sheet respectively mutually with the N contact, wherein contact adopts beryllium-bronze to make, and through Ageing Treatment, thickness is 0.25mm, the conduction inserted sheet adopts H62 brass to make, thickness is 0.5mm, and the contact after the processing has the spring steel performance, to guarantee stable contact pressure and the contact resistance in contact, elimination reduces because of the tired contact of contact contact pressure, and contact resistance increases and makes part temperatures too high until the hidden danger of damaging; On described L conduction inserted sheet and the N conduction inserted sheet mounting hole is arranged all, with the corresponding waist shape projection phase configuration that is arranged on described pillar bottom surface, and by the blanching instrument fastening it, whole solid and reliable.In the described famale connector, be arranged in the rectangular opening to touch cover length the longest, the N contact that is arranged on the outside, the long limits of rectangular opening two secondly, the L contact is the shortest, and such structure is when making the male contact socket, L connects in turn by ground connection E-center line N-phase line, when male contact was extracted, E disconnects in proper order by phase line L-center line N-ground connection, and was safe and reliable.

As preferably, be arranged on elasticity in the rectangle slotted hole of described pillar and touch the center chock that the hypomere portion of cover is provided with insulation.Make that touch the cover outer wall fits closely with the rectangular opening inwall, guarantee to touch and overlap the ground wire binding post that port shape is correctly admitted " overtemperature protection system ", make ground connection reliable.

As preferably, the inner conical surface of described famale connector shell is provided with four convex tendons, described convex tendon inner surface is on the same face of cylinder, the diameter on the described face of cylinder is consistent with the diameter D1 of centring ring, described centring ring and convex tendon are slippery, adopt matched in clearance, moving up and down to centring ring provides guide rail.

Characteristics such as therefore, it is well-balanced, rationally distributed to the utlity model has structure, and ground connection is reliable, and whole contact performance is better, and electric property is reliable and stable, and assembly technology is simple, and is easy to connect, safe and reliable, and useful life is long.This device also can be applied on the miscellaneous equipment, as cordless electric iron, electric frying pan etc.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the utility model split;

Accompanying drawing 2 is Q-Q cross-sectional view of Fig. 1;

Accompanying drawing 3 is a kind of structural representations of the utility model user mode;

Accompanying drawing 4 is the W of Fig. 1 structural representations to view;

Accompanying drawing 5 is K-K cross-sectional view of Fig. 4;

Accompanying drawing 6 is J-J cross-sectional view of Fig. 4;

Accompanying drawing 7 is M-M cross-sectional view of Fig. 1;

Embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment: with the electric kettle is example, and the utility model is made up of two parts, and referring to Fig. 1 and Fig. 3, male contact (20) is last, and famale connector (21) is following.Male contact (20) is assemblied in the electric kettle bottom, and fuses with it; Famale connector (21) is a benchmark with the male cone (strobilus masculinus) of shell (7), is assemblied in the internal taper hole of pedestal, and fuses with it.Pedestal is the work seat of electric kettle, and introduces single-phase three utmost point working powers for it.

The shell of male contact (20) is a centrosymmetric cup shell, its inner planar central that goes up is provided with  3 holes, phase line L binding post (2) and the center line N binding post (3) that geometry is a hollow cylinder is set outside it with one heart, its surface is all smooth, the employing fine copper is made, whole silver coated, to reduce oxidation and corrosion.Turn over round lip in the port of phase line L binding post (2) is provided with, the port of center line N binding post (3) is provided with the round lip that turns up, and described lip and insulation interlayer (4) phase configuration are so that the slipping into and skidding off of contact.Be provided with insulation interlayer (4) between phase line L binding post (2) and the center line N binding post (3), its bottom is with an insulation transition pad (1), adopts ultrasonic wave plastic welding technology firm the two plastic welding, makes contact very level and smooth in moving movement.Phase line L binding post (2) is connected with an end of electric heating element by left inserted sheet (5) and temperature control parts, and center line N line terminals (3) is connected with the other end of electric heating element by right inserted sheet (6) and temperature control parts, and is assembled into one with electric kettle.

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 6 and Fig. 7.Famale connector (21) inside center is provided with pillar (8), the geometry in its cross section is a hollow, rectangular, the upper end of pillar (8) is provided with short cylinder, which is provided with down inner cone, make the ground connection binding post of the  2.8 on " overtemperature protection system ", passing on male contact (20) inside behind  3 holes, planar central place, can import smoothly to be arranged on and touch cover (13) in the rectangular opening; Touch the center chock (14) that cover (13) hypomere portion is provided with insulation, make that to touch cover (13) outer wall tight with the applying of rectangular opening inwall.In the outside, rectangular opening two long limit L contact (11) and N contact (12) are set respectively, can suitably increase the radial motion space of contact like this, improved the contact performance of contact and binding post.The end of described L contact (11) and N contact (12) is provided with compound silver-based contact, and silver thickness is 0.5mm, makes it to be difficult for oxidized, and the cone angle of described contact is 100 °, and binding post is pushed contact smoothly open when making work; Wherein the conehead of the contact on the L contact (11) is set to indentations, the recess arc diameter is about four times of external diameter  D of phase line L binding post (2), the conehead of the contact on the N contact (12) is set to protruding spherical, and sphere diameter is the internal diameter  d of center line N binding post (3).Can increase contact area like this, reduce contact resistance.On the inner conical surface of famale connector shell (7), be provided with four convex tendons (17), its inner surface is on the same face of cylinder, the diameter on the described face of cylinder is consistent with the diameter D1 of centring ring (10), described centring ring (10) is slippery with convex tendon (17), adopt matched in clearance, moving up and down to centring ring provides guide rail.The end of pillar (8) is equipped with centring ring (10), and its bottom is set to inner cone and Outer Taper, and its tapering is 10 °, and the cone height is 4/10 of centring ring (a 10) height.Interior Outer Taper play the guiding role, and makes contact can not touch mutually with the centring ring lower end when assembling.Be provided with back-moving spring (9) in the centring ring (10), it adopts martensitic stain less steel to make, and through 1050 ℃ of quenchings and 650 ℃ of temper, makes it to be difficult for corrosion.

Referring to Fig. 1, Fig. 3, Fig. 4 and Fig. 5, L contact (11) is riveted with L conduction inserted sheet (15) and N conduction inserted sheet (16) respectively mutually with N contact (12), and wherein contact adopts beryllium-bronze to make, and through Ageing Treatment, thickness is 0.25mm, and the conduction inserted sheet adopts H62 brass to make, and thickness is 0.5mm; On L conduction inserted sheet (15) and the N conduction inserted sheet (16) mounting hole is arranged all, with the corresponding waist shape projection phase configuration that is arranged on pillar bottom surface (8a), and by the blanching instrument fastening it, integral body is solid and reliable.Contact after the processing has the spring steel performance, to guarantee stable contact pressure and the contact resistance in contact, eliminates because of the tired contact of contact contact pressure reduces, and contact resistance increases and makes part temperatures too high until the hidden danger of damaging.

Referring to Fig. 1 and Fig. 3, in the famale connector (21), be arranged in the rectangular opening to touch cover (13) length the longest, the N contact (12) that is arranged on the outside, the long limits of rectangular opening two secondly, the shortest, the such structure of L contact (11) is when making electric kettle work, the male contact cover taps into famale connector, and L connects in turn by ground connection E-center line N-phase line; When electric kettle power cut-off male contact was extracted, E disconnects in proper order by phase line L-center line N-ground connection, and was safe and reliable.Because the binding post of male contact (20) is provided with one heart, and smooth surface, so when electric kettle is put pedestal into, can be in arbitrary position of rotation insertion.

Because aspects such as structural design, technology arrangement, material selection, all meet related standards and definition, meet the mechanics decomposition principle, and the heat pressing process and the ultrasonic wave plastic welding technology of introducing plastic industry maturation, so the utility model electric property is safe and reliable, it is stable to be active in one's movements, and also improve greatly useful life.

Claims

1, the electrical connector that a kind of electric kettle is used, comprise male contact and the famale connector that socket-connects with it, be provided with binding post in the male contact, be provided with the contact of binding post phase configuration in the famale connector and touch cover, it is characterized in that being provided with in the male contact (20) two binding posts (2), (3), be provided with two contacts (11) in the famale connector (21), (12) and touch cover (13), the annular place, bottom of the insulation interlayer (4) in the male contact (20) is provided with a concentric insulation transition pad (1), the planar central place is provided with an aperture on male contact (20) inside, the head of the contact of famale connector (21) interior center line N contact (12) is protruding spherical, sphere diameter is the internal diameter  d of binding post (3), the head of the contact of phase line L contact (11) is an indentations, and recess arc diameter is about four times of external diameter  D of binding post (2).

2, the electrical connector used of electric kettle as claimed in claim 1, it is characterized in that insulating the internal diameter  a of transition pad (1) greater than about 0.5 millimeter of the internal diameter  d of neutral terminal (3), its external diameter  b is less than about 0.5 millimeter of the external diameter  D of phase line L binding post (2).

3, the electrical connector of using as the described electric kettle of claim (1) is characterized in that described L contact (11) and N contact (12) rivet mutually with described L conduction inserted sheet (15) and N conduction inserted sheet (16) respectively, and wherein contact employing beryllium-bronze is made.

4, the electrical connector of using as claim 1 or 3 described electric kettles is characterized in that L conduction inserted sheet (15) and N conduct electricity and a mounting hole all arranged on the inserted sheet (16).

5, the electrical connector of using as claim 1 or 3 described electric kettles, cover (13) the hypomere portion that touches that it is characterized in that being arranged in the rectangle slotted hole of pillar (8) is provided with a center chock (14) that insulate.

6, the electrical connector of using as claim 1 or 4 described electric kettles, the inner conical surface that it is characterized in that described famale connector shell (7) is provided with four convex tendons (17), described convex tendon (17) inner surface is on the same face of cylinder, the diameter on the described face of cylinder is consistent with the diameter D1 of centring ring (10), and described centring ring (10) is slippery with convex tendon (17).