CN103077789A

CN103077789A - Secure PTC starter

Info

Publication number: CN103077789A
Application number: CN2012105827844A
Authority: CN
Inventors: 邹勇; 孙雨; 张仁富; 杜甜
Original assignee: Xiaogan Huagong Gaoli Electron Co Ltd
Current assignee: Xiaogan Huagong Gaoli Electron Co Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-05-01
Anticipated expiration: 2032-12-28
Also published as: CN103077789B

Abstract

The invention relates to a starter, in particular to a secure PTC (Positive Temperature Coefficient) starter which can prevent a contact on the surface of a chip from short circuits caused by breakdown of electric sparks. The secure PTC starter comprises a PTC chip with both a first electrode face and a second electrode face, wherein the PTC chip is accommodated in an upper casing; a conductive device and a fixed supporting device are arranged in the upper casing; the conductive device comprises a first reed and a second reed; the first reed is provided with a first contact surface and a second contact surface which are symmetric up and down; the second reed is provided with a third contact surface and a fourth contact surface which are symmetric up and down; the first reed is connected with a first insert piece, and the second reed is connected with a second insert piece; the fixed supporting device comprises a first insulating convex point and a second insulating convex point; and when a biasing force generated by both the first reed and the second reed is exerted on the PTC chip, the PTC chip is supported by the second insulating convex point and the first insulating convex point.

Description

A kind of safe PTC starter

Technical field

The present invention relates to a kind of starter, relate in particular to a kind of chip surface contact that prevents because of the safety-type PTC starter of electric spark puncture short.

Background technology

The PTC starter is widely used on the assistant starting of compressor because compressor start is frequent, up to ten thousand times of starter chip bearing the heavy current impact that starts moment.The connected mode of starter inside is the reed contact at present, and PTC chip surface electrode is silver-plated structure, the quality of contact point material, and the conductive capability of chip electrode layer, the tightness degree of contact all can affect the performance of starter.Particularly abnormal voltage or abnormal current can cause the damage of getting an electric shock.If electric current continues to flow into, the phenomenon of sparking or silver layer scorification can further occur in the electric shock position that electric spark occurs.Repeatedly for several times, PTC can be chipping, and the reed contact short circuit causes more serious destruction.The serious thawing that causes insulating material and the burning of peripheral electrical equipment.

Reed is symmetrically distributed in the both sides of PTC chip in the prior art, in case the phenomenon of puncture is arranged, the easy cracked chip of clamping produces the possibility of short circuit between reed.In addition, the design of some asymmetric contact modes, reed and chip contact line of multidigit, electric spark occurs in case the contact occurs, starter resistance can increase at once, and the increase meeting of contact point Joule heat further enlarges electrode scorification face, and it is inevitable to cause the cracked result of chip.

Therefore, need a kind of safer structure.When the electric current of charging into caused the electric shock damage, described a plurality of contact-making surfaces can reduce the further deterioration of damage contact; The mal-distribution of contact point also can after chip is fully cracked, reduce the possibility of two interpolar conducting short circuits.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of chip surface contact that prevents because of the safety-type PTC starter of electric spark puncture short.

For solving the problems of the technologies described above, the invention provides a kind of safe PTC starter: comprise the PTC chip with the first electrode surface and second electrode surface, described PTC chip is placed in the upper shell, be provided with electric installation and fixing supportive device in the described upper shell, described electric installation comprises the first reed and the second reed, described the first reed is provided with laterally zygomorphic the first contact-making surface and the second contact-making surface, and described two contact-making surfaces contact up and down with the right half side of the first electrode surface; Described the second reed is provided with laterally zygomorphic the 3rd contact-making surface and the 4th contact-making surface, described two contact-making surfaces contact up and down with the right half side of the second electrode surface, the central point projection of described four contact-making surfaces can be connected to form a rectangle, described the first reed connects the first inserted sheet, and the second reed connects the second inserted sheet; Described fixedly supportive device comprises the first insulation salient point and the second insulation salient point that upper shell sets firmly, the relative both sides that are distributed in the PTC chip with the second reed of described the first insulation salient point, the relative both sides that are distributed in the PTC chip with the first reed of the second insulation salient point, the PTC chip is subject to the bias force of the first reed and the generation of the second reed, obtain to support by the second insulation salient point and the first insulation salient point, thereby the PTC chip is kept vertically.

As preferably, described the first contact-making surface, the second contact-making surface and insulation salient point rectangular Triangle-Profile on PTC chip the first electrode surface; The 3rd contact-making surface, the 4th contact-making surface and insulation salient point rectangular Triangle-Profile on PTC chip the second electrode surface, the hypotenuse of two right-angled triangles intersects.

As preferably, described the first insulation salient point and the second insulation salient point are arranged on the bottom of upper shell.

As preferably, be provided with the first wedge shape column corresponding with described the first reed position in the described upper shell, and the second wedge shape column corresponding with described the second reed position so that make two reeds respectively with the chip close contact.

As preferably, pass through welding or riveting between described the first reed and the first inserted sheet and the second reed and the second inserted sheet.

As preferably, described upper shell disposes lower house, and described upper shell and lower house are by corresponding rivet hole contraposition riveted joint.

As preferably, described PTC chip is circular.

The present invention can reduce the PTC chip under the large function of current repeatedly because the contact produces electric spark, the contact-making surface molten condition progressively becomes large possibility; Simultaneously, in the fully cracked situation of chip, reduce producing gripping object between reed, avoid the phenomenon of short circuit.PTC starter of the present invention comprises the PTC chip, with the reed of two contact-making surfaces under the active force of wedge shape column with an electrode surface close contact of PTC chip, the reed on chip both sides applies asymmetric active force to chip, and two insulation salient points of upper shell indoor design make chip overcome the bias force of reed, and are erected in the middle of the housing.With two contact-making surfaces, the projection of four contact-making surface central points is rectangular respectively for two reeds, at two contact-making surfaces of two contact-making surfaces of the same side and opposite side, two different semicircles of contact chips respectively.The purpose of design is to increase contact area like this, improves the withstanding current capability of chip, and simultaneously, electric spark appears in any contact-making surface and during loose contact, another contact-making surface on the same reed can keep the unobstructed of electric current, a little the repeatedly destruction of avoiding striking sparks.After chip destroyed fully, the bias force of reed can come off fragment, prevented the living short circuit of the cracked rear bob of chip.

Description of drawings

Accompanying drawing 1 is the structure cutaway view of a kind of safe PTC starter of the present invention.

Accompanying drawing 2 is the internal structure schematic diagram of a kind of safe PTC starter of the present invention.

Accompanying drawing 3 is the external structure schematic diagram of a kind of safe PTC starter of the present invention.

Accompanying drawing 4 is the STRUCTURE DECOMPOSITION figure of a kind of safe PTC starter of the present invention.

Embodiment

Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail, obviously, described embodiment only is part embodiment of the present invention.

Embodiment 1:

Referring to accompanying drawing 1～4, a kind of safe PTC starter of the present invention, comprise the circular PTC chip 6 with the first electrode surface 6-1 and second electrode surface 6-2, described PTC chip 6 is placed in the upper shell 1, be provided with electric installation and fixing supportive device in the described upper shell 1, described electric installation comprises the first reed 7 and the second reed 8, and described the first reed 7 is provided with laterally zygomorphic the first contact-making surface 7-1 and the second contact-making surface 7-2, and described two contact-making surfaces contact up and down with the right half side of the first electrode surface 6-1; Described the second reed 8 is provided with laterally zygomorphic the 3rd contact-making surface 8-1 and the 4th contact-making surface 8-2, described two contact-making surfaces contact up and down with the right half side of the second electrode surface 6-2, the central point projection of described four contact-making surfaces can be connected to form a rectangle, described the first reed 7 connects the first inserted sheet 3, the second reeds 8 and connects the second inserted sheet 4; Described fixedly supportive device comprises the first insulation salient point 12 and the second insulation salient point 11 that upper shell 1 sets firmly, described the first insulation salient point 12 and the second reed 8 relative both sides that are distributed in PTC chip 6, the second insulation salient point 11 and the first reed 7 relative both sides that are distributed in PTC chip 6, PTC chip 6 is subject to the bias force of the

first reed

7 and 8 generations of the second reed, obtain to support by the second insulation salient point 11 and the first insulation salient point 12, thereby described chip 6 is kept vertically.

Described the first contact-making surface 7-1, the second contact-making surface 7-2 and insulation salient point 12 rectangular Triangle-Profile on PTC chip the first electrode surface 6-1; The 3rd contact-making surface 8-1, the 4th contact-making surface 8-2 and insulation salient point 11 rectangular Triangle-Profile on PTC chip the second electrode surface 6-2, the hypotenuse of two right-angled triangles intersects, and the base part can be overlapping.Described the first insulation salient point 12 and the second insulation salient point 11 are arranged on the bottom of upper shell 1.

Be provided with the first wedge shape column 9 corresponding with described the first reed 7 positions in the described upper shell 1, and the second wedge shape column 10 corresponding with described the second reed 8 positions, so that make two reeds respectively with PTC chip 6 close contacts, pass through welding or riveting between described the first reed 7 and the first inserted sheet 3 and the second reed 8 and the second inserted sheet 4, described upper shell 1 disposes lower house 2, and described upper shell is riveted by 5 contrapositions of corresponding rivet hole with lower house.

Wherein the first inserted sheet 3 inserts the second location hole 15 that the first location hole 14, the second inserted sheets 4 on the upper shell 1 insert on the upper shell 1; PTC chip 6 can be inserted in space between four contact-making surfaces, and the PTC chip bottom is put into the upper shell bottom; Utilize the first wedge shape column 9 in the upper shell to force the first contact dough sheet 7-1 and the second contact-making surface 7-2 of the first reed 7 closely to conflict to chip 6; Simultaneously, the second wedge shape column 10 in the upper shell forces the 3rd contact-making surface 8-1 of the second reed 8 and the 4th contact-making surface 8-2 closely to conflict to PTC chip 6; The insulation salient point 11 of upper shell bottom and 12 pairs of PTC chips 6 of insulation salient point are corrected, and make it vertical.

The present invention is simple in structure, and is easily manufactured, can reduce the PTC chip under the large function of current repeatedly because the contact produces electric spark, the contact-making surface molten condition progressively becomes large possibility; Simultaneously, in the fully cracked situation of PTC chip, reduce producing gripping object between reed, avoid the phenomenon of short circuit.

Should be understood that above-described embodiment only to be used for explanation the present invention and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.

Claims

1. safe PTC starter, it is characterized in that: comprise the PTC chip (6) with the first electrode surface (6-1) and second electrode surface (6-2), described PTC chip (6) is placed in the upper shell (1), be provided with electric installation and fixing supportive device in the described upper shell (1), described electric installation comprises the first reed (7) and the second reed (8), described the first reed (7) is provided with laterally zygomorphic the first contact-making surface (7-1) and the second contact-making surface (7-2), and described two contact-making surfaces contact up and down with the right half side of the first electrode surface (6-1); Described the second reed (8) is provided with laterally zygomorphic the 3rd contact-making surface (8-1) and the 4th contact-making surface (8-2), described two contact-making surfaces contact up and down with the right half side of the second electrode surface (6-2), the central point projection of described four contact-making surfaces can be connected to form a rectangle, described the first reed (7) connects the first inserted sheet (3), and the second reed (8) connects the second inserted sheet (4); Described fixedly supportive device comprises the first insulation salient point (12) and the second insulation salient point (11) that upper shell (1) sets firmly, the relative both sides that are distributed in PTC chip (6) with the second reed (8) of described the first insulation salient point (12), the relative both sides that are distributed in PTC chip (6) with the first reed (7) of the second insulation salient point (11), PTC chip (6) is subject to the bias force of the first reed (7) and the second reed (8) generation, obtain to support by the second insulation salient point (11) and the first insulation salient point (12), thereby PTC chip (6) is kept vertically.

2. safe PTC starter according to claim 1 is characterized in that: described the first contact-making surface (7-1), the second contact-making surface (7-2) and insulation salient point (12) rectangular Triangle-Profile on PTC chip the first electrode surface (6-1); The 3rd contact-making surface (8-1), the 4th contact-making surface (8-2) and insulation salient point (11) are at the upper rectangular Triangle-Profile of PTC chip the second electrode surface (6-2), and the hypotenuse of two right-angled triangles intersects.

3. safe PTC starter according to claim 1 and 2 is characterized in that: described the first insulation salient point (12) and second salient point (11) that insulate is arranged on the bottom of upper shell (1).

4. safe PTC starter according to claim 1, it is characterized in that: be provided with the first wedge shape column (9) corresponding with described the first reed (7) position in the described upper shell (1), and the second wedge shape column (10) corresponding with described the second reed (8) position so that make two reeds respectively with PTC chip (6) close contact.

5. safe PTC starter according to claim 1 is characterized in that: pass through welding or riveting between described the first reed (7) and the first inserted sheet (3) and the second reed (8) and the second inserted sheet (4).

6. safe PTC starter according to claim 1, it is characterized in that: described upper shell (1) disposes lower house (2), and described upper shell is riveted by corresponding rivet hole (5) contraposition with lower house.

7. safe PTC starter according to claim 1 is characterized in that: described PTC chip is for circular.