High current miniature circuit breaker
Technical field
It the utility model is related to a kind of high current miniature circuit breaker.
Background technology
Miniature circuit breaker, especially high current miniature circuit breaker can produce electric arc in disjunction, and electric arc draws along run-on tab
Separate in arc-extinguish chamber and extinguish, in high current disjunction, because electric current reduces rapidly, magnet coil can produce induced-current obstruction
Electric current reduces, so that the electric arc between static contact and moving contact can not quickly extinguish, influences the normal disjunction of miniature circuit breaker,
And miniature circuit breaker internal temperature rise is improved, it is to improve one of big obstruction for miniature circuit breaker rated current.
The content of the invention
The purpose of this utility model is solve above-mentioned technical problem, there is provided one kind prevents caused heat gas in arc-extinguish chamber
The high current miniature circuit breaker altered on body and electric arc.
To achieve the above object, the utility model uses a kind of high current miniature circuit breaker, including housing and is arranged on shell
Internal operating mechanism, electromagnetic system, arc-extinguish chamber, binding post, operating mechanism and electromagnetic system are arranged on the top of housing, go out
Arc cover is arranged on below electromagnetic system, and binding post is arranged on housing both ends, and electromagnetic system includes magnet coil, static contact, electricity
Magnetic coil both ends are connected with binding post and static contact upper end respectively, and static contact lower end forms aduncate bending section, bending
The upper run-on tab extended to above arc-extinguish chamber is connected with portion, upper run-on tab extends in parallel along arc-extinguish chamber upper surface, it is described on draw
Arc plate includes first half and latter half of, and first half is connected with static contact, latter half of to be connected with binding post, latter half of and first half
Between form one of gap.
The end that the utility model is further arranged to the first half of the upper run-on tab forms a breach, upper run-on tab
Latter half of front end form projection and be plugged in the breach.Cooperated by raised with the breach of indent, by this
Mutually interspersed cooperation, make electric arc be more prone to across upper run-on tab first half and it is latter half of between gap.
The first half front end that the utility model is further arranged to the upper run-on tab is welded in the bending section of static contact
Side.
The utility model, which is further arranged to the binding post, includes wire frame and terminal plate, and terminal plate includes outer company
Portion, transition part, interior portion of company, outer portion of company and interior portion of company are horizontally disposed with, and transition part vertical connection connects between portion and interior portion of company outside, outside
Portion of company is plugged in wire frame, and interior portion of company is connected with magnet coil one end, and the latter half of of upper run-on tab is connected on transition part.
The beneficial effects of the utility model are that upper run-on tab is extended on binding post from static contact lower end, and in upper striking
Electric current during one section of crack cut-off normal power-up is set among plate, and in disjunction high current, electric current caused by electromagnetic induction can be straight
Run-on tab was connected, because upper run-on tab is short more than magnet coil, passes through the far fast mistake of the reduction speed of the electric current of upper run-on tab
By the reduction speed of magnet coil, therefore reach the quick purpose for reducing electric current, realize the quick disjunction of electric arc, greatly improve
The rated current of miniature circuit breaker.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model specific embodiment.
Fig. 2 is the electromagnetic system schematic diagram of the utility model specific embodiment.
Fig. 3 is the electromagnetic system schematic diagram of the utility model specific embodiment.
Embodiment
As shown in Figure 1-Figure 3, specific embodiment of the utility model is a kind of high current miniature circuit breaker, including housing 1
With operating mechanism 2, electromagnetic system 3, arc-extinguish chamber 4, the binding post 5 being arranged in housing 1, operating mechanism 2 and electromagnetic system 3 are set
Put on the top of housing 1, arc-extinguish chamber 4 is arranged on the lower section of electromagnetic system 3, and binding post 5 is arranged on the both ends of housing 1, electromagnetic system 3
Including magnet coil 31, static contact 32, the both ends of magnet coil 31 are connected with binding post 5 and the upper end of static contact 32 respectively, stationary contact
First 32 lower end forms aduncate bending section 33, and the upper run-on tab 34 for extending to the top of arc-extinguish chamber 4 is connected with bending section 33,
Upper run-on tab 34 extends in parallel along the upper surface of arc-extinguish chamber 4, and upper run-on tab 34 includes first half 341 and latter half of 342, first half
341 are connected with static contact 32, and the front end of first half 341 is welded on the inner side of bending section 33 of static contact 32, and latter half of 342 and terminals
Son 5 connects, and binding post 5 includes wire frame 52 and terminal plate 51, and terminal plate 51 includes outer portion of company 511, transition part 512, interior company
Portion 513, outer portion of company 511 and Nei Lian portions 513 are horizontally disposed, the vertical connection of transition part 512 connect outside portion 511 and Nei Lian portions 513 it
Between, outer portion of company 511 is plugged in wire frame 52, and interior portion of company 513 is connected with the one end of magnet coil 31, upper run-on tab 34 it is latter half of
342 are connected on transition part 512, and the end of the first half 341 of upper run-on tab 34 forms a breach 343, upper run-on tab 34
Latter half of 342 front end forms projection and 344 is plugged in breach 343, between latter half of 342 and first half 341 along projection 344 and
The junction of breach 343 forms one of gap 345.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.