CN108054064A - A kind of miniature circuit breaker - Google Patents
A kind of miniature circuit breaker Download PDFInfo
- Publication number
- CN108054064A CN108054064A CN201810083971.5A CN201810083971A CN108054064A CN 108054064 A CN108054064 A CN 108054064A CN 201810083971 A CN201810083971 A CN 201810083971A CN 108054064 A CN108054064 A CN 108054064A
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- China
- Prior art keywords
- heat
- contact
- conducting piece
- bimetal leaf
- circuit breaker
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
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Abstract
The invention discloses a kind of miniature circuit breakers, including housing, are installed on the in vivo operating mechanism of the shell, contact mechanism and overload protecting mechanism, the overload protecting mechanism includes bimetal leaf and heat-conducting piece and driving member；One end of the heat-conducting piece is connected with moving contact, and the other end is connected with outlet side terminal, and the galvanic circle that outlet side terminal is transferred to through moving contact and heat-conducting piece, the bimetal leaf and the heat-conducting piece thermal conductive contact are formed when moving contact closes a floodgate with static contact.Using technical solution of the present invention, heat-conducting piece generates heat when passing through electric current, so as to carry out auxiliary heating to bimetal leaf, the heat-conducting piece resistivity is less than the resistivity of the bimetal leaf to promote the conductive capability of heat-conducting piece, without the design method of two-way electric current, realize miniature circuit breaker meet more high current by design requirement, stability is more preferable, debugging is simple and more accurate, reduces design difficulty, highly practical.
Description
Technical field
The present invention relates to low voltage electrical apparatus technology fields, and in particular to a kind of miniature circuit breaker.
Background technology
Miniature circuit breaker has two big major protective function of short-circuit protection and overload protection, and overload protection passes through breaker
Thermal tripping system realizes protection.When circuit overloads, it is more than by the electric current of miniature circuit breaker as defined in miniature circuit breaker
During rated current, the caloric value of miniature circuit breaker increases, and the bimetal leaf in thermal tripping system is made to be heated by circuit loop swollen
Swollen bending using one end of double gold bends that trip assembley therefor in miniature circuit breaker is promoted to act so that the tripping of breaker, from
And realize the overload protection to circuit and electrical equipment.
But in existing miniature circuit breaker, bimetal leaf can not bear the logical of high current because of the limitation of production technology
It crosses, can only generally bear 63A and following electric current passes through.If the cross-sectional dimensions of bimetal leaf are done greatly, itself is easily influenced
It is not flexible using characteristic, it is fragile, so as to also limit the development that miniature circuit breaker promotes high current ability, such pole
Improve design difficulty greatly.
For this purpose, occur in the prior art in tripping system by the way of current distributing so that breaker passes through bigger
Electric current, if Chinese patent literature CN203707061U discloses a kind of miniature circuit breaker, including housing, electromagnetic system, contact system
System and arc quenching system, outgoing line side current path connect from the moving contact in contact system through the first conducting wire, bimetal leaf, heating element
To leading-out terminal wire connection terminal, the second conducting wire that one end is connected to the welding section at moving contact back, the second conducting wire other end are further included
Be connected to heating element, heating element is welded by welded plate and leading-out terminal wire connection terminal, therefore, from moving contact by electric current point
Leading-out terminal wire connection terminal is not connected with bimetal leaf by the first conducting wire and the heated element of the second conducting wire.
Although the structure setting of above patent document can make current class from 63A promotions to 80A, in actual use
There are still problems with：Using the form of two-way current distributing, two accesses are affected by spot-welding technology, when solder joint is uneven
When the resistivity of a line conductor is made to be lower, become larger by electric current, distributed so as to cause two-way electric current uneven so that miniature circuit breaker
It is failure to actuate within the thermal tripping time or acts too early, deflect away from claimed range, debugging difficulty increase, stability is poor, influences product
Performance.Secondly, shunt by the two Resistance Influence, bimetal leaf tolerance electric current is improved limited.
The content of the invention
Therefore, the technical problem to be solved in the present invention is to overcome miniature circuit breaker of the prior art that can not bear big electricity
Stream passes through and uses two-way current distributing big by the two Resistance Influence, to cause the distribution of two-way electric current uneven, debugging difficulty
Greatly, the problem of stability is poor, so as to provide it is a kind of it is simple in structure, debugging is convenient, stability is good, high current can be born by it is small
Type breaker.
In order to solve the above technical problems, the present invention provides a kind of miniature circuit breaker, including housing, it is installed in the housing
Operating mechanism, contact mechanism and overload protecting mechanism, the operating mechanism drives moving contact in the contact mechanism and quiet
Contact closes a floodgate, alternatively, driving the moving contact with the static contact away from separating brake；
The overload protecting mechanism include bimetal leaf and heat-conducting piece and, trigger institute under bimetal leaf effect
State the driving member that operating mechanism drives the contact mechanism separating brake；One end of the heat-conducting piece is connected with the moving contact, another
End is connected with outlet side terminal, is formed when the moving contact closes a floodgate with the static contact through the moving contact and the heat-conducting piece
It is transferred to the galvanic circle of the outlet side terminal, the bimetal leaf and the heat-conducting piece thermal conductive contact；The heat-conducting piece
Resistivity is less than the resistivity of the bimetal leaf.
As a preferred embodiment, the heat-conducting piece is the laminated structure extended side by side with the bimetal leaf, described double
Sheet metal fits in the heat-conducting piece side.
As a preferred embodiment, the bimetal leaf by adhesive glue sticker in the heat-conducting piece backwards to the moving contact
Side.
As a preferred embodiment, one end of the bimetal leaf is the fixing end with the heat-conducting piece secure fit, separately
One end is the free end of heated bending；The free end is connected with the driving member, and the operation is triggered by the driving member
Mechanism drives the contact mechanism separating brake.
As a preferred embodiment, the fixing end is concordant with the heat-conducting piece end, and the two is fixedly installed in the shell
Clip position on body, the free end exceed the heat-conducting piece setpoint distance.
As a preferred embodiment, determining for bimetal leaf described in fixed clamp and the heat-conducting piece is provided on the housing
Position adjusting part, the positioning adjusting part include being installed on the in vivo positioning plate of the shell and are removably set on the shell
Adjusting screw in body formed pilot hole, the positioning plate and the adjusting screw formed in opposite directions the clamping bimetal leaf and
The clip position of heat-conducting piece finely tunes the bimetal leaf in the in vivo opposite position of the shell by rotating adjusting bolt
It puts.
As a preferred embodiment, the both ends side of the heat-conducting piece has been separately formed gusset piece and second line of a couplet fishplate bar, institute
It states gusset piece by soft strength with the moving contact to be connected, the second line of a couplet fishplate bar is connected with the outlet side terminal.
As a preferred embodiment, the heat-conducting piece is by T1 red copper integrally casting shapings.
As a preferred embodiment, the operating mechanism includes：
Operation handle；
Contact supporting is rotatably provided in the housing；The moving contact be mounted on the contact supporting on and with institute
Contact supporting linkage is stated to set；
Resetting spring, one end are connected to the housing, and the other end is connected to the contact supporting, and the resetting spring is to institute
It states contact supporting and applies drive moving contact trend active force separated with the static contact；
Tripping is rotatably provided in the contact supporting, links with the operation handle；
Lock, is pivotally mounted in the contact supporting, when coordinating with the tripping, the contact supporting is in the behaviour
Make the handle effect lower driving moving contact movement；Depart from the tripping and coordinate, the contact supporting is in the resetting spring
Under the action of drive the moving contact away from the static contact；
The bimetal leaf drives the lock to depart from the cooperation with the tripping by the driving member.
As a preferred embodiment, the driving member is pull rod, and one end of the pull rod is fixed on the lock, another
It holds and extends to the bimetal leaf one side and be oppositely arranged with the free end.
Technical scheme has the following advantages that：
1. in miniature circuit breaker provided by the invention, overload protecting mechanism includes bimetal leaf and the heat conduction of thermal conductive contact
Part, one end of heat-conducting piece are connected with the moving contact, and the other end is connected with outlet side terminal, this structure setting, are touched by dynamic
Head, heat-conducting piece and outlet side terminal form galvanic circle, and the heat-conducting piece generates heat when passing through electric current, so as to bimetal leaf
Auxiliary heating is carried out, power circuit will not be formed since bimetal leaf does not connect load, so as to which bimetal leaf be overcome to be limited by electric current
Therefore the problem of processed, when bimetal leaf, which is heated, reaches overload temperature, understands flexure operation and passes through driving member driving operation naturally
Mechanism carries out sub-switching operation, i.e., dynamic and static contact separation.Using technical solution of the present invention, the heat-conducting piece resistivity is less than double gold
Belong to the resistivity of piece, there is fabulous electric conductivity, thermal conductivity and processing performance, promote the conductive capability of heat-conducting piece, technical staff
The specification of heat-conducting piece can accordingly be selected according to the design specification of miniature circuit breaker, neither change bimetal leaf, and can
Avoid the design method using two-way electric current, with galvanic circle all the way realize miniature circuit breaker meet more high current by design
Demand, stability is more preferable, and debugging is simple and more accurate, reduces design difficulty, is truly realized miniature circuit breaker big more than 63A
Current specification, it is highly practical, it is widely used.
2. in miniature circuit breaker provided by the invention, the positioning adjusting part includes being installed on the in vivo positioning of the shell
Plate and the adjusting screw being removably set in the molding pilot hole of the housing, the positioning plate and the adjusting screw phase
To one end of the clamping bimetal leaf and heat-conducting piece, so that fixation is played in housing to bimetal leaf and heat-conducting piece,
From above-mentioned set-up mode, it is only necessary to by rotating the stroke distances of the adjusting screw, so as to the fixation to bimetal leaf
Position is finely adjusted, and plays the purpose for adjusting distance between bimetal leaf and driving member, so that bimetal leaf overloads curved drive
It is dynamic apart from shorter, triggering is more timely, and cooperation is accurately and reliably, easy to adjust.
3. in miniature circuit breaker provided by the invention, one end of the pull rod is fixed on the lock, the other end is to institute
It states bimetal leaf one side to extend and be oppositely arranged with the free end, bimetal leaf bending in overload pushes the pull rod
The other end, by the pull rod drive it is described lock rotate and release the lock fit with the tripping, i.e., described in latch in institute
It states and rotation is generated under the pulling force effect of pull rod, so as to release the matching relationship of lock and tripping, to reach the thermal tripping of breaker
The purpose of protection, securely and reliably.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the planar structure schematic diagram of miniature circuit breaker provided by the invention；
Fig. 2 is the dimensional structure diagram of the miniature circuit breaker of the present invention；
Fig. 3 is the dimensional structure diagram of the opposite side of the miniature circuit breaker of the present invention；
Fig. 4 is the heat-conducting piece of the present invention and the structure diagram of bimetal leaf；
Reference sign：1- housings, 2- operating mechanisms, 21- contact supportings, 22- trippings, 23- locks, 24- reset bullet
Spring, 3- moving contacts, 4- static contacts, 51- bimetal leafs, 52- heat-conducting pieces, the upper gusset pieces of 521-, 522- second line of a couplet fishplate bars, 53- positioning
Plate, 54- adjusting screws, 55- driving members, 6- outlet side terminals.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
In the description of the present invention, it is necessary to which explanation, term " first ", " second ", " the 3rd " are only used for description purpose,
And it is not intended that instruction or hint relative importance.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can be combined with each other into conflict.
Embodiment 1
The present embodiment is specifically described below in conjunction with the accompanying drawings：
The present invention provides a kind of miniature circuit breaker as shown in Figs 1-4, including housing 1, the behaviour being installed in the housing 1
Make mechanism 2, contact mechanism and overload protecting mechanism, the operating mechanism 2 drives moving contact 3 and stationary contact in the contact mechanism
First 4 contact is closed a floodgate, alternatively, driving the moving contact 3 with the static contact 4 away from separating brake；
The overload protecting mechanism include bimetal leaf 51 and heat-conducting piece 52 and, touched under bimetal leaf effect
Sending out operating mechanism 2 described drives the driving member 55 of the contact mechanism separating brake；One end of the heat-conducting piece 52 and the moving contact 3
Connection, the other end are connected with outlet side terminal 6, are formed when the moving contact 3 closes a floodgate with the static contact 4 through the moving contact
3 and the heat-conducting piece 52 be transferred to the galvanic circle of the outlet side terminal 6, the bimetal leaf 51 and the heat-conducting piece 52
Thermal conductive contact, the heat-conducting piece are less than the resistivity of bimetal leaf by T1 red copper integrally casting shapings, resistivity.
The above embodiment is the core technology scheme of the present embodiment, and overload protecting mechanism includes the bimetallic of thermal conductive contact
Piece 51 and heat-conducting piece 52, one end of heat-conducting piece are connected with the moving contact 3, and the other end is connected with outlet side terminal 6, this knot
Structure is set, and forms galvanic circle by moving contact 3, heat-conducting piece 52 and outlet side terminal 6, the heat-conducting piece 52 is when passing through electric current
So as to carry out auxiliary heating to bimetal leaf 51, power circuit will not be formed since bimetal leaf does not connect load for fever, so as to
Overcome the problems, such as that bimetal leaf by current limit, therefore, when bimetal leaf 51 is heated reaches overload temperature, can be bent dynamic naturally
Make and pass through the driving progress sub-switching operation of operating mechanism 2 of driving member 55, i.e., dynamic and static contact separation.Using technical solution of the present invention,
52 resistivity of heat-conducting piece is less than the resistivity of bimetal leaf 51, has excellent electric conductivity, thermal conductivity and processing performance, carries
The conductive capability of heat-conducting piece is risen, technical staff can carry out the specification of heat-conducting piece according to the design specification of miniature circuit breaker corresponding
Selection, neither changes bimetal leaf, and can avoid the design method using two-way electric current, is realized with galvanic circle all the way small-sized disconnected
Road device meet more high current by design requirement, stability is more preferable, and debugging is simple and more accurate, reduces design difficulty, makes small
Type breaker is truly realized the high current specification more than 63A, highly practical, widely used.
In the present embodiment, the heat-conducting piece is preferably by T1 red copper integrally casting shapings, and T1 red coppers contain for oxygen and impurity
Fine copper extremely low, that purity is high is measured, interior impurity is discharged by oxidation, and solid solution capacity reduces the electrical conductance for being conducive to T1 red coppers, also may be used
The influence of objectionable impurities is eliminated, for copper content more than 99.95%, impurity summation is no more than 0.05%.Therefore, T1 red coppers have very
Good electrical conductivity and thermal conductivity, it is corresponding to reduce obstruction ability of the electric current by heat-conducting piece, bimetal leaf 51 is made to match somebody with somebody with heat-conducting piece 52
It closes using more stable and reliable.Wherein, T1 red coppers can be used for welding, so as to so that the both ends connection moving contact of heat-conducting piece and outlet
The side terminal period of the day from 11 p.m. to 1 a.m realizes that welding procedure is handled by annealed copper wire.Obviously, the heat-conducting piece 52 is a kind of not just for T1 red coppers, also
Can be other materials with excellent conductive capability and heat conductivility, such as oxygen-free copper TUI and TU2 etc., herein not to heat conduction
The other structures of part repeat one by one.
Made further preferably according to the above embodiment, the heat-conducting piece 52 extends side by side with the bimetal leaf 51
Laminated structure, the bimetal leaf 51 fit in 52 side of heat-conducting piece, realize between bimetal leaf 51 and heat-conducting piece 52
Auxiliary heating, contact area is big, and heat-conducting effect is more preferable, and the heat being transferred on bimetal leaf 51 is more stable and concentrates, and makes small-sized
Breaker realizes trip operation at the appointed time when doing trip-gear, promote product performance.It is described to lead in the present embodiment
Warmware 52 substitute bimetal leaf galvanic circle is formed in overload protecting mechanism, by select increase heat-conducting piece cross-sectional area with
Meet phase induced current by bearing requirements, and bimetal leaf flexure operation at once when reaching the overload temperature of setting do not influence
The normal work of bimetal leaf, so as to promoted miniature circuit breaker allow by operating current, realization accomplish 80A and more than
The purpose of current specification.
Specifically, the bimetal leaf 51 by adhesive glue sticker in the heat-conducting piece 52 backwards to the moving contact 3 side
Face.This structure setting, it is convenient to be connected, and adhesive glue uses the preferable colloid of heat conductivility, not only can efficiently transfer heat, but also
Fixation can be achieved；It, can be backwards to moving contact when bimetal leaf 51 reaches overload temperature and according to the characteristic of bimetal leaf 51
3 direction flexure operation, so as to drive sub-switching operation of the driving member 55 with pneumatic operating mechanism realization contact mechanism.
With reference to shown in Fig. 1-2, one end of the bimetal leaf 51 is the fixing end with 52 secure fit of heat-conducting piece, separately
One end is the free end of heated bending；The free end is connected with the driving member, and the behaviour is triggered by the driving member 55
Make mechanism 2 and drive the contact mechanism separating brake.As a kind of specific set-up mode, the fixing end and 52 end of heat-conducting piece
Portion is concordant, and the two is fixedly installed in the clip position on the housing 1, the free end beyond the heat-conducting piece 52 set away from
From, be conducive to the free end of bimetal leaf 51 and bend in overload, so as to by the free end promote driving member 55 to
Direction away from moving contact 3 moves, and operating mechanism is made to drive the contact mechanism separating brake under the drive of driving member.
The position of bimetal leaf and heat-conducting piece is adjusted and fixed for convenience, as Figure 2-3, the housing
The positioning adjusting part of bimetal leaf 51 described in fixed clamp and the heat-conducting piece 52, the positioning adjusting part are provided on 1
Including the positioning plate 53 being installed in the housing 1 and the adjusting spiral shell being removably set in the 1 molding pilot hole of housing
Silk 54, the positioning plate 53 and the adjusting screw 54 form the folder for clamping the bimetal leaf 51 and heat-conducting piece 52 in opposite directions
Position is held, is used to finely tune the bimetal leaf 51 in the in vivo relative position of the shell by rotating adjusting bolt 54.By upper
It states structure and understands that the positioning plate 53 and the adjusting screw 54 clamp the one of the bimetal leaf 51 and heat-conducting piece 52 in opposite directions
End so as to play fixation in housing to bimetal leaf and heat-conducting piece, when finely tuning 51 position of bimetal leaf, only needs
, so as to be finely adjusted to the fixed position of bimetal leaf 51, tune is played by rotating the stroke distances of the adjusting screw 54
Save the purpose of distance between bimetal leaf and driving member so that the curved driving of bimetal leaf overload is apart from shorter, triggering more and
When, cooperation is accurately and reliably, easy to adjust.
As a preferred embodiment, as shown in figure 4, the both ends side of the heat-conducting piece 52 has been separately formed the first line of a couplet
Fishplate bar 521 and second line of a couplet fishplate bar 522, the upper gusset piece 521 are connected by soft strength with the moving contact 3, the second line of a couplet fishplate bar
522 are connected with the outlet side terminal 6, can directly weld or soft strength.This structure setting, upper gusset piece 521 and the second line of a couplet
Fishplate bar 522 is respectively the wiring position demand that the both ends of the heat-conducting piece provide connection moving contact and outlet side terminal, just
In patching operations, and the installation site of bimetal leaf is not influenced, design is reasonable, and cooperation is reliable.
It elaborates below in conjunction with the concrete structure of the operating mechanism of Fig. 1-3 pairs of the present embodiment：
The operating mechanism 2 includes：Operation handle, contact supporting, resetting spring, tripping and lock；The contact supporting
21, it is rotatably provided in the housing 1；The moving contact 3 be mounted on the contact supporting 21 on and with the contact supporting
Linkage is set；One end of the resetting spring 24 is connected to the housing 1, and the other end is connected to the contact supporting 21, described
Resetting spring 24 applies to the contact supporting 21 drives the moving contact 3 to tend to and the 4 separated active force of static contact；Institute
It states tripping 22 and is rotatably provided in the contact supporting 21, link with the operation handle；The lock 23 is pivotally mounted to
In the contact supporting 21, when coordinating with the tripping, the contact supporting 21 is under operation handle effect described in driving
Moving contact 3 moves；Depart from the tripping 22 and coordinate, the contact supporting 21 drives institute under the action of the resetting spring 24
Moving contact 3 is stated away from the static contact 4；Specifically, the bimetal leaf 51 drives the lock 23 by the driving member 55
Depart from the cooperation with the tripping 22.
And the closing by hand and dropout separating brake process of miniature circuit breaker are illustrated with reference to Fig. 1 and Fig. 2：
During breaker closing by hand, the operation handle drives the tripping 22 to rotate when rotating, and realizes the tripping 22
With the lock fit of the lock 23, in locking process, the tripping 22 pulls the support 21 together with the lock 23
It rotates, and by the support 21 moving contact 3 is driven to be contacted with static contact 4, the resetting spring energy storage at this time.And it serves as
The bimetal leaf overload in protection mechanism is carried when bending, by driving member the lock 23 is pulled to rotate and is departed from and tripping
22 lock fit, the tripping 22 and the active force of described 23 pairs of supports 21 of lock for releasing cooperation disappear, described
The return under the action of resetting spring of support 21, so as to which the moving contact 3 be driven to be separated with static contact 4, breaker takes off at this time
Deduction of points lock.
In the present embodiment, the driving member 55 is pull rod, and one end of the pull rod is fixed on the lock 23, another
It holds and extends to 51 one side of bimetal leaf and be oppositely arranged with the free end.The advantages of this arrangement are as follows pass through pull rod
The flecition power of bimetal leaf is transferred, i.e., described lock 23 generates rotation under the pulling force effect of the pull rod, so as to release
Lock 23 and the matching relationship of tripping 22, to achieve the purpose that the thermal tripping of breaker is protected, securely and reliably.
Obviously, the above embodiments are merely examples for clarifying the description, and is not intended to limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And the obvious variation thus extended out or
Among changing still in the protection domain of the invention.
Claims (10)
1. a kind of miniature circuit breaker, including housing (1), be installed on operating mechanism (2) in the housing (1), contact mechanism and
Overload protecting mechanism, the operating mechanism (2) drive moving contact (3) and static contact (4) contact combined floodgate in the contact mechanism,
Alternatively, drive the moving contact (3) with the static contact (4) away from separating brake；
It is characterized in that：The overload protecting mechanism include bimetal leaf (51) and heat-conducting piece (52) and, in the bimetallic
The piece effect lower triggering operating mechanism drives the driving member (55) of the contact mechanism separating brake；One end of the heat-conducting piece (52)
It is connected with the moving contact (3), the other end is connected with outlet side terminal (6), the moving contact (3) and the static contact (4)
The galvanic circle that the outlet side terminal (6) is transferred to through the moving contact (3) and the heat-conducting piece (52) is formed during combined floodgate,
The bimetal leaf (51) and the heat-conducting piece (52) thermal conductive contact；Heat-conducting piece (52) resistivity is less than the bimetal leaf
(51) resistivity.
2. miniature circuit breaker according to claim 1, it is characterised in that:The heat-conducting piece (52) be and the bimetal leaf
(51) laminated structure extended side by side, the bimetal leaf (51) fit in the heat-conducting piece (52) side.
3. miniature circuit breaker according to claim 2, it is characterised in that:The bimetal leaf (51) passes through adhesive glue sticker
In the heat-conducting piece (52) backwards to the side of the moving contact (3).
4. the miniature circuit breaker according to Claims 2 or 3, it is characterised in that:One end of the bimetal leaf (51) be with
The fixing end of heat-conducting piece (52) secure fit, the other end are the free end of heated bending；The free end and the transmission
Part (55) is connected, and triggering the operating mechanism by the driving member (55) drives the contact mechanism separating brake.
5. miniature circuit breaker according to claim 4, it is characterised in that：The fixing end is put down with the heat-conducting piece end
Together, the two is fixedly installed in the clip position on the housing (1), the free end beyond the heat-conducting piece (52) set away from
From.
6. miniature circuit breaker according to claim 5, it is characterised in that：Fixed clamp institute is provided on the housing (1)
The positioning adjusting part of bimetal leaf (51) and the heat-conducting piece (52) is stated, the positioning adjusting part includes being installed on the shell
Positioning plate (53) in body (1) and the adjusting screw (54) being removably set in the housing (1) molding pilot hole, institute
It states positioning plate (53) and the adjusting screw (54) and is formed in opposite directions and clamp the described of the bimetal leaf (51) and heat-conducting piece (52)
Clip position is used to finely tune the bimetal leaf (51) in the in vivo relative position of the shell by rotating adjusting bolt (54).
7. according to the miniature circuit breaker any one of claim 1-6, it is characterised in that:The both ends of the heat-conducting piece (52)
Side has been separately formed gusset piece (521) and second line of a couplet fishplate bar (522), the upper gusset piece (521) by soft strength with it is described
Moving contact is connected, and the second line of a couplet fishplate bar (522) is connected with the outlet side terminal (6).
8. miniature circuit breaker according to claim 1, it is characterised in that:The heat-conducting piece (52) is by T1 red copper integrally castings
Shaping.
9. miniature circuit breaker according to claim 1, which is characterized in that the operating mechanism (2) includes：
Operation handle；
Contact supporting (21) is rotatably provided in the housing (1)；The moving contact (3) is mounted on the contact supporting
(21) link on and with the contact supporting and set；
Resetting spring (24), one end are connected to the housing (1), and the other end is connected to the contact supporting (21), the reset
Spring (24) applies to the contact supporting (21) drives the moving contact (3) to tend to effect separated with the static contact (3)
Power；
Tripping (22) is rotatably provided in the contact supporting (21), links with the operation handle；
It latches (23), is pivotally mounted in the contact supporting (21), when coordinating with the tripping (22), the contact supporting
(21) under the operation handle effect moving contact (3) is driven to move；Depart from the tripping (22) and coordinate, the contact
Stent (21) drives the moving contact (3) away from the static contact (4) under the action of the resetting spring (24)；
The bimetal leaf drives the lock to depart from the cooperation with the tripping by the driving member.
10. miniature circuit breaker according to claim 9, it is characterised in that：The driving member (55) be pull rod, the pull rod
One end be fixed on it is described lock (23) on, the other end to the bimetal leaf (51) one side extend and it is opposite with the free end
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810083971.5A CN108054064A (en) | 2018-01-29 | 2018-01-29 | A kind of miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810083971.5A CN108054064A (en) | 2018-01-29 | 2018-01-29 | A kind of miniature circuit breaker |
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| CN108054064A true CN108054064A (en) | 2018-05-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810083971.5A Pending CN108054064A (en) | 2018-01-29 | 2018-01-29 | A kind of miniature circuit breaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036982A (en) * | 2018-10-16 | 2018-12-18 | 中欧电气有限公司 | A kind of plug-in type miniature circuit breaker |
| CN109637907A (en) * | 2018-12-28 | 2019-04-16 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
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| EP2913836A1 (en) * | 2014-02-28 | 2015-09-02 | Siemens Aktiengesellschaft | Thermal trip device of a thermal magnetic circuit breaker having a resistor element, thermal magnetic circuit breaker and switching device for interrupting a current flow and method for protecting an electrical circuit from damage |
| CN106384698A (en) * | 2016-11-17 | 2017-02-08 | 国网福建省电力有限公司 | Low-voltage distributed power supply grid connecting switch |
| CN207852598U (en) * | 2018-01-29 | 2018-09-11 | 温州市正松电气有限公司 | A kind of miniature circuit breaker |
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| US4771258A (en) * | 1987-10-29 | 1988-09-13 | General Electric Company | Molded case circuit breaker bimetal with high calibration yield |
| CN201060819Y (en) * | 2007-06-13 | 2008-05-14 | 温州奥来电器有限公司 | Energy accumulation type high breaking small-sized breaker |
| CN203466147U (en) * | 2013-09-27 | 2014-03-05 | 浙江大华开关厂 | Breaker operation mechanism |
| EP2913836A1 (en) * | 2014-02-28 | 2015-09-02 | Siemens Aktiengesellschaft | Thermal trip device of a thermal magnetic circuit breaker having a resistor element, thermal magnetic circuit breaker and switching device for interrupting a current flow and method for protecting an electrical circuit from damage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036982A (en) * | 2018-10-16 | 2018-12-18 | 中欧电气有限公司 | A kind of plug-in type miniature circuit breaker |
| CN109637907A (en) * | 2018-12-28 | 2019-04-16 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
| CN109637907B (en) * | 2018-12-28 | 2024-05-14 | 浙江正泰电器股份有限公司 | Small-sized circuit breaker |
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