CN101364506A

CN101364506A - Molded case circuit breaker with contact on mechanism

Info

Publication number: CN101364506A
Application number: CNA2008101333548A
Authority: CN
Inventors: 宋重千; 林祥桓; 姜圣宇
Original assignee: LS Industrial Systems Co Ltd
Current assignee: LS Electric Co Ltd
Priority date: 2007-08-10
Filing date: 2008-08-11
Publication date: 2009-02-11
Anticipated expiration: 2028-08-11
Also published as: KR100914203B1; CN101364506B; KR20090016342A

Abstract

A molded case circuit breaker having a contact on mechanism which can perform a trip operation and automatically rotates the handle to the on position or a position toward the on position if the handle is manipulated to move to the off (or reset) position in a state that the contacts are melt-adhered to each other, the contact on mechanism, including: a contact on plate which is vertically movable by being guided according to the operation of the switching mechanism, a trip bar that drives the restricting unit to a releasing position, a lever connected to the handle and that provides a pivot point of the handle, a lever pin fixed to the lever, for driving the restricting unit to the releasing position by pressing the trip bar, and thereby operating the switching mechanism to the trip position, and a trip spring providing an elastic driving force for enabling the switching mechanism to operate to the trip position when the restricting unit is moved to the releasing position.

Description

Molded case circuit breaker with contact mechanism

Related application

It is that the korean application of 10-2007-0080900,10-2007-0080902 and 10-2007-0080903 is the main body that comprises in the priority document that the disclosure is involved in the application number of submitting to August in 2007 10, and it is combined in this in full to do reference.

Technical field

The present invention relates to molded case circuit breaker (molded case circuit breaker), more particularly, relate to molded case circuit breaker with contact mechanism.

Background technology

Usually, molded case circuit breaker is a kind of protection electrical equipment, protects electric loading equipment and electric wire to prevent the overload or the overcurrent that may take place in circuit by automatic shutoff circuit.In such molded case circuit breaker, position by the handle of user's manual control can be divided into mechanism dropout position (that is TRIP position), circuit open position (that is OFF position, by switching mechanism, in other words be the RESET position) and circuit closed position (that is ON position).When fault current (perhaps abnormal current) took place, molded case circuit breaker was carried out the operation (tripoperation) of threading off, and handle points to another position except that make position.At this moment, contact fusing coherent condition or other reason owing to movable contactor and fixed contact, when the contact of movable contactor and fixed contact does not have when separated from one another, user's control crank moves to reset position with its position, it is open position, so that handle is moved to make position or towards the position of make position, indicates and warn the user that molded case circuit breaker has been switched on.Here, handle will be automatically indicating closing position or near the position of make position, and do not indicate open position (not at open position), thereby the conducting state that is electrical contact with each other of the contact of notice User Activity contactor and fixed contact.Such operation (function) is called as " operating of contacts (function) ".The invention reside in provides a kind of molded case circuit breaker with mechanism of execution " operating of contacts ".

In order to implement the operating of contacts of the automatic indicating closing of handle position when the contact contacts and therefore be in conducting state, the position that is used as the toggle pin of the jockey between upper connecting rod and the lower link should not surpass and be used for the position of the hinge point of the action bars of support handle (that is pivot) rotatably.Here, upper connecting rod and lower link are used to support and drive the axle of movable contactor and the driver part between the handle as being connected.That is, when when the front is seen, toggle pin (togglepin) should be positioned at the left side of hinge point (pivot).At this moment, at trip status, the position of toggle pin should surpass the position of action bars hinge point, that is, and and on the right side of hinge point.Therefore, the such position separately in the operating of contacts process and in trip status is opposite.

In order to implement operating of contacts and the operation of threading off, need to regulate the position of the bending point between upper connecting rod and the lower link and the length ratio between upper connecting rod and the lower link.Therefore, have for the condition that satisfies opposite location and cause the switching mechanism problem of unstable.

In addition, also propose a kind of by brake being installed so that limit the method that described action bars prevents that handle from moving towards open position.Here, handle is stopped in the open position vicinity, rather than by chance at open position.This may cause the problem that can not carry out operating of contacts when contacting when the contact and therefore being in conducting state.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of molded case circuit breaker with contact mechanism, it is stable, can not cause the instability of switching mechanism, and makes handle indicating closing position or towards the position of make position and brake need not be installed exactly.

In order to reach this advantage of the present invention and other advantages, such as here embodiment and wide in range description, a kind of molded case circuit breaker is provided, it comprises: fixed contact; Movable contactor, it can move to and the described fixed contact position contacting and the position of separating from described fixed contact; Switching mechanism is used to drive described movable contactor to contact with described fixed contact or to separate so that the cut-off/close circuit; Limiting part is used to limit described switching mechanism; And handle, be used for the described switching mechanism of cut-off/close manually, described molded case circuit breaker comprises: contact mechanism, melt each other in the state of adhesion in the contact of described movable contactor and the contact of fixed contact, when described handle is moved to open position (reset position) by manipulation, described contact mechanism makes described switching mechanism thread off by discharging described limiting part, and does not even make described handle rotate automatically so that the indication conducting state towards make position with manual force.

In order to reach this advantage of the present invention and other advantages, such as here embodiment and wide in range description, a kind of molded case circuit breaker is provided, it comprises: handle, it can indicate the ON position of molded case circuit breaker closed circuit or the OFF position of molded case circuit breaker open circuit, and the manual operation unit that is used for the manual operation molded case circuit breaker is provided; Action bars, the one end is connected to described handle, by rotating with described handle with described engagement, and provides pivotal point to described handle; Pivotal axis, it is connected to the other end of action bars so that provide pivotal point to described action bars; Side plate supports described pivotal axis with being used for fixing; Fixed contact, it is connected to mains side or electrical load side; Movable contactor, it can be pivoted to and the described fixed contact position contacting and the position of separating with described fixed contact; Axle is used to support described movable contactor and provides rotary driving force to described movable contactor; And a pair of axle drive pin, it is by rotating with the described axle of the described incompatible driving that is coupling, to be used for the multipole described driving movable contactor that drives simultaneously; Lower link, its lower end are connected in the described axle drive pin, so that provide rotary driving force to the axle drive pin; Upper connecting rod, it is connected by engaging with lower link; Toggle pin is used to connect the upper end of lower link and the lower end of upper connecting rod; Dropout spring, its two ends are supported by toggle pin and handle respectively, and the dropout spring is loaded with elastic potential energy in the ON position, and discharges elastic potential energy in the dropout operating process, so that provide rotary driving force to described axle; Breech lock is used to limit the dropout spring so that the state that its maintenance is loaded; The latch fixation device can be pivoted to the position of restriction breech lock and the position of latch; And nail, its pivotal path that is arranged on the latch fixation device is interior so that oppress and the pivotal latch fixture, and described molded case circuit breaker comprises:

Contact plate, its lower end are connected in the described a pair of axle drive pin one, and are directed to vertically according to the rotation of described axle drive pin and move;

Release lever, it is connected the top of contact plate pivotly, and can discharge described limiting part with rotation; And

The operation lever pin, it is fixed to described action bars, and melt each other in the state of adhesion in make position in the contact of described movable contactor and the contact of fixed contact, when handle is moved to open position or reset position by manipulation, described operation lever pin rotates described nail by the compressing release lever, thereby make molded case circuit breaker thread off

The horizontal level of toggle pin that wherein supports the lower end of dropout spring does not exceed the position of pivotal axis, so that even handle is moved to reset position (open position) by manipulation, melt each other in the state of adhesion in the contact of described movable contactor and the contact of fixed contact, also can provide elastic force, be used to make handle automatically to pivot so that indicate conducting state towards make position.

The specification of the present invention that describes in detail below in conjunction with the accompanying drawings, aforementioned and other purpose of the present invention, characteristic, scheme and advantage will become more obvious.

Description of drawings

Accompanying drawing is included to provide further understanding of the invention, and is bonded to this and constitutes the part of this specification, and illustrated embodiment of the present invention and specification one are used from explains principle of the present invention.

In the accompanying drawings:

Fig. 1 illustrates the front view according to the critical piece of the molded case circuit breaker with contact mechanism of first embodiment of the invention that is in the ON state when having carried out operating of contacts;

Fig. 2 illustrates the stereogram according to the critical piece of the molded case circuit breaker with contact mechanism of first embodiment of the invention that is in the ON state when having carried out operating of contacts;

Fig. 3 is the front view according to the critical piece of the molded case circuit breaker with contact mechanism of the OFF state that is in of first embodiment of the invention;

Fig. 4 is for before driving operating of contacts in contact fusing coherent condition, handle is operated when moving to OFF (resetting) position, according to the front view of the critical piece of the molded case circuit breaker with contact mechanism of first embodiment of the invention;

Fig. 5 is for before driving operating of contacts in contact fusing coherent condition, handle is operated when moving to OFF (resetting) position, according to the stereogram of the critical piece of the molded case circuit breaker with contact mechanism of first embodiment of the invention;

Fig. 6 illustrates the stereogram of conduct according to the contact plate of the critical piece of the contact mechanism of first embodiment of the invention;

Fig. 7 illustrates the stereogram of conduct according to the release lever (trip bar) of the critical piece of the contact mechanism of first embodiment of the invention;

Fig. 8 illustrates the stereogram according to the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention that looks up in the upper right side;

Fig. 9 illustrates the stereogram according to the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention that looks up in the lower left;

Figure 10 illustrates the figure according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention that is in the ON state when having carried out operating of contacts;

Figure 11 is the figure that illustrates according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of the OFF state that is in of second embodiment of the invention;

Figure 12 is for illustrating when user's operating grip in abnormality moves to the OFF position with its position, according to the figure of the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention;

Figure 13 is the figure that illustrates according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism that is in abnormality of second embodiment of the invention;

Figure 14 is the stereogram that illustrates according to the structure of the critical piece of the molded case circuit breaker with contact mechanism of third embodiment of the invention;

Figure 15 is the figure that illustrates according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of the ON state that is in of third embodiment of the invention;

Figure 16 is the figure that illustrates according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of the OFF state that is in of third embodiment of the invention;

Figure 17 is the figure that illustrates according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism that is in trip status of third embodiment of the invention; And

Figure 18 is for illustrating according to third embodiment of the invention, when carrying out operating of contacts front control handle its position is moved to the OFF position, has the figure of mode of operation of critical piece of the molded case circuit breaker of contact mechanism.

Embodiment

Provide the description of preferred implementation of the present invention below in detail, its example illustrates in the accompanying drawings.

Fig. 1 and 2 is respectively when having carried out operating of contacts, is in the front view and the stereogram according to the critical piece of the molded case circuit breaker with contact mechanism of first embodiment of the invention of ON state.Describe structure and operation thereof in detail below with reference to Fig. 1 and 2 at the molded case circuit breaker of closure state according to first embodiment of the invention.

Usually, can comprise according to molded case circuit breaker of the present invention: a pair of fixed contact 1a and 1b; Movable contactor 2, it can move to fixed contact 1a, 1b position contacting or move to the position of separating with fixed contact 1a, 1b; Switching mechanism (for example, comprise 3,3-1a, 3-1b, 4a, 4b, 4c, 6,7,8,9) is used to drive movable contactor 2 and contacts or be located away from fixed contact 1a, 1b, so that the cut-off/close circuit; Limiting part (for example, comprising 12,13,14) is used to limit switching mechanism; And handle 6, be used for cut-off/close switching mechanism manually.

Especially, molded case circuit breaker according to first embodiment of the invention (for example can comprise contact mechanism, comprise 7,7-1,9,10,11), when handle 6 in the state that melts adhesion in the contact of the contact of movable contactor 2 and fixed contact 1a, 1b is each other handled when moving to open position or reset position, this contact mechanism makes switching mechanism thread off by the restriction that discharges described limiting part, and make handle 6 rotate automatically towards make position, and do not need to use manual force, so that indication conducting state.

More particularly, molded case circuit breaker according to first embodiment of the invention can comprise handle 6, handle 6 can indicate the make position of molded case circuit breaker closed circuit or molded case circuit breaker to disconnect the open position of the circuit that is connected, and is provided with the manual operation unit that is used for manually operating molded case circuit breaker.

In addition, can comprise action bars 7 according to the switching mechanism of the molded case circuit breaker of first embodiment of the invention, the one end is connected to handle 6, by engaging with handle 6 and pivot with handle 6, and provides pivotal point to handle 6.

In addition, can comprise according to the switching mechanism of the molded case circuit breaker of first embodiment of the invention: pivotal axis 8, it is connected to the other end of action bars 7, so that provide pivotal point to action bars 7; And the side plate 5 that is used to support pivotal axis 8.Here, for example, pivotal axis 8 may be embodied as the rivet that is supported regularly by described side plate.

In addition, can comprise according to the molded case circuit breaker of first embodiment of the invention: fixed contact 1a, 1b, it is connected to mains side or electrical load side; Movable contactor 2, it can be pivoted to and fixed contact 1a, 1b position contacting and the position of separating with fixed contact 1a, 1b; Axle 3 is used to support movable contactor 2 and provides rotary driving force to movable contactor 2; And a pair of axle drive pin 3-1a, 3-1b, it is by rotating with axle 3 with the joint of axle 3, to be used for leggy or the multipole movable contactor 2 that drives simultaneously.

In addition, can comprise according to the switching mechanism of the molded case circuit breaker of first embodiment of the invention: lower link 4a, its lower end is connected to axle 3 so that provide rotary driving force to axle 3; Upper connecting rod 4b, it is connected by engaging with lower link 4a; Toggle pin 4c is used to connect the upper end of lower link 4a and the lower end of upper connecting rod 4b; And dropout spring 9, its two ends are supported by toggle pin 4c and handle 6 respectively, and dropout spring 9 is loaded flexible potential energy in the ON position, and discharges elastic potential energy so that provide rotary driving force to axle 3 in the dropout operating process.

Limiting part according to the molded case circuit breaker of first embodiment of the invention can comprise: breech lock (latch) 14 is used to limit dropout spring 9 so that the state that keeps being loaded; Latch fixation device (latch holder) 13 can be pivoted to the position of restriction breech lock 14 and the position of latch 14; And follow closely 12, its rotate path (rotational trajectory) that is arranged on latch fixation device 13 is interior so that compressing and pivotal axis latch fixation device 13.

Contact mechanism according to the molded case circuit breaker of first embodiment of the invention can comprise: contact plate 10, its lower end is connected on a pair of 3-1b among drive pin 3-1a, the 3-1b, according to the rotation of axle drive pin 3-1b, contact plate 10 is directed to and can vertically moves; Release lever 11, it is pivotably connected to the upper end of contact plate 10, and is used for discharging and rotation nail 12; And operation lever pin 7-1, it is fixed on the action bars 7, and be used for being handled when moving to open position when being melted the state handle 6 that adheres to together in make position in the contact of the contact of movable contactor 2 and fixed contact 1a, 1b, rotate nail 12 by compressing release lever 11, thereby make molded case circuit breaker thread off.

Operation lever pin 7-1 may be embodied as the pin of separation, perhaps is embodied as the protuberance that forms around the relevant position of action bars 7 by protruding.

Making the contact of movable contactor 2 and the contact of fixed contact 1a, 1b not have in the state separated from one another because of contact fusing adhesion or any other reason, user's control crank 6 is to move to its position reset position (or open position).In order to indicate the conducting state of molded case circuit breaker, also should be provided under the state of handle 6 (that is, not having manual force) handle 6 towards the make position elastic force of rotation automatically even discharged the user.For this reason, the horizontal level of toggle pin 4c that supports the lower end of dropout spring 9 should be in the left side of pivotal axis 8, as shown in Figure 1, so that it can not exceed the horizontal level of pivotal axis 8.

For the rotation according to axle drive pin 3-1b vertically guides contact plate 10, side plate 5 is provided with and is used for the guiding elongated hole 5-3 of leading axle drive pin 3-1b vertically, and is provided with the outstanding latch 5-1 that moves up with restriction contact plate 10.Contact plate 10 is provided with elongated recess 10c, and it limits moving up of contact plate 10 around latch 5-1 and by latch 5-1.

At this moment, below with reference to Fig. 6 and 7 structures of describing in detail according to the contact plate 10 and the release lever 11 of first embodiment of the invention.

As shown in Figure 6, hub portion (boss portion) 10d as pivotal axis is formed on the upper end of contact plate 10, and as shown in Figure 7, the axle pockets 11d of portion is formed on the release lever 11 corresponding with hub portion 10d, so that release lever 11 can be carried out pivoting action around the upper end of contact plate 10.

More particularly, as shown in Figure 6, pin-and-hole 10b is arranged on the lower end of contact plate 10 on longitudinally, so that the axle drive pin 3-1b (Fig. 1) of axle 3 inserts wherein, elongated recess 10c forms on longitudinally from the central part of contact plate 10 and extends, as the pivotal axis of release lever 11 so that support the hub portion 10d of release lever 11 pivotally and be arranged on the upper end of contact plate 10 from the flange 10a that hub portion 10d radially extends respectively at longitudinally.

As shown in Figure 7, be used to hold the axle pockets 11d of portion of the hub portion 10d of contact plate 10, and the flange accommodation section 11b that is used to hold the flange 10a of contact plate 10 is formed on the central part of release lever 11 on longitudinally.And the nail restrictions 11c that can be pivoted to the position of restriction nail 12 (Fig. 1) or discharge the position of nail 12 forms that the central part from release lever 11 extends upward on longitudinally.In addition, release lever 11 comprises that further actuating force bears 11a of portion and the 11e of weight balancing portion, actuating force bear the 11a of portion on longitudinally from the central part horizontal expansion of release lever 11 so that bear rotary driving force from the operation lever pin 7-1 (Fig. 1) of action bars 7 (Fig. 1), the 11e of weight balancing portion central part from release lever 11 on longitudinally extends downwards so that as counterpoise.

After this, describe in detail when the open position of handle from Fig. 3 being maneuvered to make position, with reference to Fig. 1 and 2 according to the operation of molded case circuit breaker of the present invention.

At open position (that is, reset position) as shown in Figure 3, if the user by manual force control crank 6 so that its position is moved to make position, the toggle pin 4c that supports an end of dropout spring 9 moves obliquely down.Therefore, dropout spring 9 is tightened up and loads elastic potential energy.

Along with toggle pin 4c moves obliquely down, lower link 4a and upper connecting rod 4b are folded together with certain angle, as shown in fig. 1.

Here, as shown in fig. 1, because toggle pin 4c moves obliquely down, lower link 4a moves down, and therefore, axle drive pin 3-1a (left side in Fig. 1) rotates in the counterclockwise direction.

On diametric(al), be positioned at the also rotation in the counterclockwise direction of axle drive pin 3-1b of the opposite side of axle 3, therefore be in lifting position, as shown in fig. 1.

3-1b moves to lifting position along with the axle drive pin, and an end is connected to the contact plate of drive pin 3-1b 10 by guiding elongate aperture section 5-3, latch 5-1 and elongated recesses 10c guiding, therefore vertically moves.

At reset position (that is, open position) as shown in Figure 3, breech lock 14 is by 13 restrictions of latch fixation device.Arrive the operation of make positions according to handle 6, action bars 7 (left in Fig. 1 or 2 to) is in the counterclockwise direction gone up rotation, and be fixed on the action bars 7 operation lever pin 7-1 also in the counterclockwise direction (left in Fig. 1 or 2 to) go up rotation.Operation lever pin 7-1 separates (separation) with release lever 11.

Here, along with axle 3 rotates in the counterclockwise direction, movable contactor 2 contact fixed contact 1a, 1b.Then, fixed contact 1a, 1b are electrically connected to each other, thereby the circuit between closed mains side and the electrical load side, therefore are in conducting state.

At this moment, with reference to the opening operation of Fig. 3 detailed description according to the molded case circuit breaker with contact mechanism of first embodiment of the invention.

In make position (Fig. 1) or at the dropout position in the centre position of handle 6 between closed and disconnected position (not shown), if the user moves to open position by manual force control crank 6 with its position, the upper end of dropout spring 9 (as shown in fig. 1) is moved to the right side among Fig. 3.

The elastic restoring force of original rectilinear form of spring 9 of being used to then to recover to thread off is applied to dropout spring 9, thereby the lower end of dropout spring moved to as shown in FIG. right side, thereby the toggle pin 4c that will be used to support the lower end of dropout spring moves to the right side.

Along with upper connecting rod 4b rotates and lower link 4a rotates in the clockwise direction in the counterclockwise direction, upper connecting rod 4b and lower link 4a are folded together with certain included angle.Therefore, axle 3 is rotation in the clockwise direction, therefore has the off-state (open circuit) that movable contactor 2 separates with fixed contact 1a, 1b.

Here, because breech lock 14 is limited by latch fixation device 13, dropout spring 9 is tightened up and is loaded with elastic potential energy.Therefore, the toggle pin 4c of an end that is used to support the dropout spring of tension is moved to the right side, exceeds the pivotal axis 8 of action bars 7 simultaneously.

Along with toggle pin is moved to the right side, lower link 4a and upper connecting rod 4b are than more closely being folded together shown in Fig. 1 (that is, having littler angle).

That is, because toggle pin 4c moves to the right side, lower link 4a moves up from the position shown in Fig. 1, and therefore, axle drive pin 3-1a (left side in Fig. 1) rotates in the clockwise direction.

On diametric(al), be positioned at the also rotation in the clockwise direction of an axle drive pin 3-1b of axle 3 opposite side, thereby be in down position, opposite with shown in Fig. 1.

3-1b moves to down position along with the axle drive pin, and an end is connected to the contact plate of drive pin 3-1b 10 and is directed elongate aperture section 5-3, latch 5-1 and elongated recesses 10c guiding, is therefore moved down.

At the reset position shown in Fig. 3, breech lock 14 is by 13 restrictions of latch fixation device.According to the operation of the arrival open position of handle 6, action bars 7 (right in Fig. 3) is in the clockwise direction gone up rotation, and be fixed on the action bars 7 operation lever pin 7-1 also in the clockwise direction (right in Fig. 3) go up rotation.Here, because contact plate 10 moves down, the release lever 11 that is connected to the upper end of contact plate 10 also descends, and therefore operating lever pin 7-1 separates (separation) with release lever 11, as shown in Figure 3.

Here, along with axle 3 rotates in the clockwise direction, movable contactor 2 separates from fixed contact 1a, 1b.Then, fixed contact 1a, 1b electrically disconnect each other, thereby have disconnected the circuit between mains side and the electrical load side, have therefore disconnected circuit.

At this moment, with reference to the operating of contacts of Figure 4 and 5 detailed description according to the molded case circuit breaker of first embodiment of the invention.

Fig. 4 illustrates operating of contacts in contact fusing coherent condition, according to the front view of the critical piece of the molded case circuit breaker with contact mechanism of first embodiment of the invention.Fig. 5 illustrates operating of contacts in contact fusing coherent condition, according to the stereogram of the critical piece of the molded case circuit breaker with contact mechanism of first embodiment of the invention.

When according to the molded case circuit breaker of first embodiment of the invention since fault current (for example, overcurrent etc.) carry out when threading off operation, even handle 6 is in the dropout position shown in Fig. 4, as shown in fig. 1, owing to contact fusing coherent condition or other reason, the contact of the contact of movable contactor 2 and fixed contact 1a, 1b does not have separated from one another, therefore is in conducting state.Then, the user may think that molded case circuit breaker is in trip status by mistake, and attempts to connect circuit breaker (carrying out closed the manipulation).

Here, in order to connect the molded case circuit breaker that is in trip status, handle 6 at first should be moved to open position (reset position) by manipulation, moves to make position then.

Therefore, user's control crank 6 moves to open position with its position.The action bars 7 that is connected on the handle 6 pivots (promptly around pivotal axis 8 in the clockwise direction, right side in the Figure 4 and 5) so that is positioned at open position, therefore pivot in the clockwise direction and be fixed to operation lever pin 7-1 on the action bars 7 (that is the right side in the Figure 4 and 5).

Here, along with the contact of movable contactor 2 and the contact of fixed contact 1a, 1b are positioned at the closure state shown in Fig. 1, an axle drive pin 3-1b (right side in the drawings) rises, and contact plate 10 and release lever 11 also rise.Therefore, operation lever pin 7-1 moves to the right side, bears the 11a of portion with the actuating force of release lever 11 simultaneously and contacts.

As shown in Figures 4 and 5, release lever 11 rotates in the counterclockwise direction, and the nail that lower surface limited 12 that is limited the portion of bearing 12 is discharged by the nail restrictions 11c of release lever 11.The elastic force of the spring (not shown) of nail 12 (directions shown in the figure) by being used for flexibly propping up nail 12 is in the clockwise direction around nail pivotal axis 12b rotation.

Therefore, when the compressing of the lower end of the nail 12 that is pivoted, latch fixation device 13 is in the counterclockwise direction around the rotation of latch fixation device back shaft (not shown).Along with latch fixation device 13 is rotated, confined breech lock 14 is released (if thread off then be in release condition), thereby carries out the operation of threading off.

Melt each other in the state of adhesion in the contact of movable contactor 2 and the contact of fixed contact 1a, 1b, if being handled, handle 6 moves to open position, toggle pin 4c maintenance position as shown in Figure 1 is so that exceed pivotal axis 8 in the horizontal direction (promptly, toggle pin 4c is positioned at the left side of pivotal axis 8, as shown in Fig. 1,4 and 5).

Therefore, the top of the dropout spring 9 that supported by toggle pin 4c of lower end is bent to right side (that is the right side in the Figure 4 and 5) by the operation of the arrival open position of handle 6.If handle 6 is released at open position, the top that bends to the dropout spring 9 on right side is applied in elastic restoring force, is used for its lower left quarter is returned to rectilinear form, thereby automatically handle 6 is moved towards make position, therefore finishes operating of contacts.

After carrying out operating of contacts, identical according to the position (state) of the molded case circuit breaker of first embodiment of the invention with the molded case circuit breaker that is in the close position shown in Fig. 1 or 2, thus omit its detailed explanation.

First embodiment of the invention, under the condition that the molded case circuit breaker with contact mechanism should be threaded off, when causing the contact not have even the user attempts handle is moved to disconnection (resetting) position, can not carry out reset operation when separated from one another because contact fusing adheres to wait.If handle 6 is released, make position is instructed to, thereby notifies user's molded case circuit breaker to be switched on.Therefore, the user can correctly take required action for safety.

For example, by handling such as release unit previous stage near the main circuit breaker in the previous stage of mains side, the user can disconnect any further overcurrent conducting, and takes to separate the action that has caused chaotic molded case circuit breaker, carries out distribution, replacement, maintenance etc.

Fig. 8 illustrates the stereogram according to the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention that looks up in the upper right side.Fig. 9 illustrates the stereogram according to the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention that looks up in the lower left.Below with reference to Fig. 8 and 9 structures of describing in detail according to the molded case circuit breaker with contact mechanism of second embodiment of the invention.

With reference to Fig. 8 and 9, can comprise known parts: a pair of fixed contact 1a, 1b according to molded case circuit breaker of the present invention; Movable contactor 2, it is movable to the position of contact fixed contact 1a, 1b, and the position of separating with fixed contact 1a, 1b; Switching mechanism (for example, comprise 3,3-1a, 3-1b, 4a, 4b, 4c, 6,7,8,9) is used to drive movable contactor 2 with fixed contact 1a, 1b contact or separate, so that the cut-off/close circuit; Limiting part (for example, comprising 12,13,14) is used to limit described switching mechanism; And handle 6, be used for the described switching mechanism of cut-off/close manually.

Molded case circuit breaker according to second embodiment of the invention can comprise certain components: contact mechanism (for example, comprise 7,7-1,9,10,11), melt each other under the state of adhesion in the contact of movable contactor 2 and fixed contact 1a, 1b, when handle 6 is handled when moving to open position or reset position, described contact mechanism makes described switching mechanism thread off by discharging described limiting part, and handle 6 is automatically rotated towards make position, so that indication conducting state.

More particularly, molded case circuit breaker according to second embodiment of the invention can comprise handle 6, it can indicate the ON position of molded case circuit breaker closed circuit or molded case circuit breaker to disconnect the OFF position of the circuit that is connected, and the manual operation unit that is used for the manual operation molded case circuit breaker is provided.

In addition, can comprise action bars 7 according to the switching mechanism of the molded case circuit breaker of second embodiment of the invention, the one end is connected to handle 6, by pivoting with engaging of handle 6, and provides pivotal point to handle 6.

In addition, the switching mechanism according to the molded case circuit breaker of second embodiment of the invention can comprise: pivotal axis 8, the pivotal point that it is connected to the other end of action bars 7 and provides action bars 7; And side plate 5, be used for fixing pivotal axis 8.Here, pivotal axis 8 for example may be embodied as the rivet that is fixed on the side plate.

In addition, can comprise according to the molded case circuit breaker of second embodiment of the invention: fixed contact 1a, 1b, it is connected to mains side or electrical load side; Movable contactor 2, it can be pivoted to and fixed contact 1a, 1b position contacting and the position of separating with fixed contact 1a, 1b; Axle 3 is used to support movable contactor 2 and provides rotary driving force to movable contactor 2; And a pair of axle drive pin 3-1a, 3-1b, it can rotate with axle 3 by the joint with axle 3, drives movable contactor 2 simultaneously to be used for leggy (in other words, multipole).

In addition, can comprise according to the switching mechanism of the molded case circuit breaker of second embodiment of the invention: lower link 4a, its lower end is connected to axle 3 so that provide rotary driving force to axle 3; Upper connecting rod 4b, it is connected by engaging with lower link 4a; Toggle pin 4c is used to connect the upper end of lower link 4a and the lower end of upper connecting rod 4b; And dropout spring 9, its two ends are supported by toggle pin 4c and handle 6 respectively, and dropout spring 9 is loaded with elastic potential energy in make position, and discharges elastic potential energy in the dropout operating process, so that provide rotary driving force to axle 3.

Limiting part according to the molded case circuit breaker of second embodiment of the invention can comprise: breech lock 14 is used to limit dropout spring 9 so that it keeps the state that loads; Latch fixation device 13 is movable to the position of restriction breech lock 14 and the position of latch 14; And follow closely 12, its pivot (rotation) path (track) that is arranged on latch fixation device 13 is interior so that compressing and rotating shaft latch fixation device 13.

Contact mechanism according to the molded case circuit breaker of second embodiment of the invention can comprise: contact plate 10, its lower end is connected on the 3-1b among a pair of axle drive pin 3-1a, the 3-1b, and moves to be directed to vertically according to the rotation of axle drive pin 3-1b and move; Contact lever 11, it is connected the top of contact plate 10 pivotly, and is used for described limiting part is driven into the off-position; Action bars 7 is used to handle 6 that pivotal point is provided; Action bars extension 7a, it is from action bars 7 extensions and be connected to contact plate 10, be used for when the ON position, melting each other under the state of adhesion in the contact of movable contactor and fixed contact, when control crank moves to the OFF position, rotate contact lever 11 by pivot contact plate 10, thereby limiting part is moved to the off-position; And dropout spring 9, its upper end is connected to handle 6, and provides flexible drive power to be used for when limiting part is moved to the off-position switching mechanism moved to the dropout position.

According to preferred embodiment, the limiting part that contact lever 11 can be driven into restriction site or off-position may be embodied as nail 12.Therefore, according to preferred embodiment, the limiting part that action bars extension 7a can be driven into the off-position also may be embodied as nail 12.

Melt each other under the state of adhesion in the contact of movable contactor and the contact of fixed contact, when user's control crank 6 so that its position is moved to open position (reset position), do not illustrate and be used to connect contact plate 10, be used for the structure of transmission of drive force with pivot contact plate 10 and action bars extension 7a.Yet, can be by groove being combined with protuberance or being connected contact plate 10 and action bars extension 7a by connecting pin.Alternatively, action bars extension 7a can form the downtrodden shape by contacting described contact plate 10.

Because contact fusing adheres to or any other reason makes that in the state not separated from one another of the contact of the contact of movable contactor 2 and fixed contact 1a, 1b, user's control crank 6 is to move to its position reset position (or open position).In order to indicate the conducting state of molded case circuit breaker, also should be provided for making handle 6 towards automatically the pivot elastic force of (that is operating of contacts) of make position under the state of handle 6 (that is, not having manual force) even discharged the user.For this reason, the horizontal level of toggle pin 4c that supports the lower end of dropout spring 9 should be in the left side of pivotal axis 8, as shown in Figure 9, so that it does not exceed the horizontal level of pivotal axis 8.

Vertically guide contact plate 10 for the pivot according to axle drive pin 3-1b moves, side plate 5 is provided with the vertical guide elongated hole (Reference numeral does not provide) that is used for leading axle drive pin 3-1b.And contact plate 10 be provided with vertical formation with the first guiding elongate aperture section 10a of the rotary middle spindle that holds contact lever 11 and be used to hold the protuberance 11a of contact lever 11 and be used for actuating force is delivered to the second guiding elongate aperture section 10b of contact lever 11.

Contact lever 11 can comprise: nail rotating part 11b, and its end that is arranged on contact lever 11 is used for compressing nail 12; And actuating force bears the 11a of portion, and it is provided with relatively with nail rotating part 11b and is outstanding in the axial direction so that bear the rotary driving force of contact lever 11.

Contact lever 11 is supported and is fixed on the side plate 5 by the centrepin 11-1 that forms there with penetrating at the central part on the longitudinally, thereby rotatable around centrepin 11-1.

The first and second guiding elongate aperture section 10a, the 10b of contact plate 10 are arc elongate aperture section, wherein, and the outside of the upper end that is centered close to contact plate 10 of arc.Under this structure, the direction of rotation separately of contact plate 10 and contact lever 11 toward each other.

At this moment, with reference to the closed procedure of Figure 10 detailed description according to the molded case circuit breaker of second embodiment of the invention.Figure 10 illustrates the figure according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention that is in the ON state when having carried out operating of contacts.

In off-state shown in Figure 11, if the user comes control crank 6 that its position is moved to make position by manual force, as shown in Figure 10, the toggle pin 4c of an end that is used to support the dropout spring 9 of tension moves obliquely down.Therefore, dropout spring 9 (Fig. 8) is tightened up and is loaded with elastic potential energy.

Because toggle pin 4c moves obliquely down, lower link 4a and upper connecting rod 4b are folded together at a certain angle, as shown in Figure 8.

Here, along with toggle pin 4c moves obliquely down, lower link 4a moves as shown in Figure 8 down, and therefore, axle drive pin 3-1a (left side in Fig. 8) rotates in the counterclockwise direction.

Then, on diametric(al), be positioned at the also rotation in the counterclockwise direction of another drive pin 3-1b of the opposite side of axle 3, therefore in lifting position, as shown in Figure 10.

3-1b moves to lifting position along with the axle drive pin, and an end is connected to the contact plate of drive pin 3-1b 10 and is directed elongated hole (Reference numeral is not shown), centrepin 11-1, the first and second guiding

elongate aperture section

10a, 10b guiding, therefore moves up.

Here, because contact plate 10 and axle drive pin 3-1b rise together, contact plate 10 is not around axle drive pin 3-1b rotation.Therefore, the position that the actuating force of contact lever 11 is born 11a of portion and centrepin 11-1 can transform to the first and second guiding elongate aperture section 10a as shown in Figure 10, the corresponding lower end wall of 10b from the first and second guiding elongate aperture section 10a as shown in Figure 11, the upper end wall of 10b.Therefore, contact lever 11 does not rotate, and nail 12 is not driven.

Along with axle 3 rotates in the counterclockwise direction, movable contactor 2 contact fixed contact 1a, 1b.Therefore, fixed contact 1a, 1b are electrical contact with each other, thereby the circuit between closed mains side and the electrical load side, therefore are in conducting state.

At this moment, describe in detail according to the opening operation with molded case circuit breaker of contact mechanism of the present invention with reference to Figure 11.Figure 11 illustrates the figure according to the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention that is in the OFF state.

In make position (Figure 10) or in the dropout position in the centre position of handle 6 between the closed and disconnected position (Figure 13), if the user moves to open position by manual force control crank 6 with its position, the upper end of dropout spring 9 (as shown in Figure 8) is moved to the right side among Figure 11.

The elastic restoring force that is used to then make dropout spring 9 recover its original rectilinear form is applied to dropout spring 9, thereby as shown in FIG. the lower end of dropout spring 9 is moved to the right side, thereby the toggle pin 4c that will be used to support the lower end of dropout spring moves to the right side.

Along with upper connecting rod 4b rotates and lower link 4a rotates in the clockwise direction in the counterclockwise direction, upper connecting rod 4b and lower link 4a (among Fig. 8) are folded together with certain included angle.Therefore, axle 3 is rotation in the clockwise direction, therefore has the off-state (circuit disconnection) that movable contactor 2 separates from fixed contact 1a, 1b.

Here, because breech lock 14 is limited by latch fixation device 13, dropout spring 9 is tightened up and is loaded with elastic potential energy.Therefore, the toggle pin 4c that is used to support an end of the dropout spring that is tightened up is moved to the right side, and has exceeded the pivotal axis 8 of action bars 7.

Along with toggle pin is moved to the right side, lower link 4a and upper connecting rod 4b more closely are folded together with the angle littler than the angle shown in Fig. 8.

That is, because toggle pin 4c moves to the right side, lower link 4a moves up from the position shown in Fig. 8, and therefore, axle drive pin 3-1a (left side in Fig. 8) rotates in the clockwise direction.

On diametric(al), be positioned at the also rotation in the clockwise direction of another drive pin 3-1b of axle 3 opposite side, thereby be in down position, opposite with shown in Fig. 8.

Along with axle drive pin 3-1b moves to as shown in Figure 11 down position, one end is connected to the contact plate of drive pin 3-1b 10 and bears the 11a of portion and centrepin 11-1 and the first and second guiding

elongate aperture section

10a, 10b guiding by the actuating force that is formed on guiding elongated hole 5-3 on the side plate 5, contact lever 11, therefore vertically descends.

Here, because contact plate 10 and axle drive pin 3-1b descend together, contact plate 10 is not around axle drive pin 3-1b rotation.Therefore, the position that the actuating force of contact lever 11 is born 11a of portion and centrepin 11-1 can transform to the first and second guiding elongate aperture section 10a as shown in Figure 11, the corresponding upper end wall of 10b from the first and second guiding elongate aperture section 10a as shown in Figure 10, the lower end wall of 10b.Therefore, contact lever 11 does not rotate, and nail 12 is not driven.

Along with axle 3 rotates in the clockwise direction, movable contactor 2 separates from fixed contact 1a, 1b.Therefore, fixed contact 1a, 1b electrically disconnect, thereby have disconnected the circuit between mains side and the electrical load side, therefore are in off-state (circuit disconnection).

Figure 13 is the figure of mode of operation that illustrates the critical piece of the molded case circuit breaker that is in abnormality.As shown in Figure 13, abnormality refers to when the contact of the contact of movable contactor 2 and fixed contact 1a, 1b is melted adhesion each other, because adhering to wait to cause, the contact fusing attempts to respond fault current (promptly, short circuit current etc.) dropout operation failure, therefore indicate conducting state, but handle 6 indication dropout positions (centre position between make position and the open position).

At this moment, under such abnormality in Figure 13, the handle of attempting to handle molded case circuit breaker as the user moves to make position, and when not knowing clearly the contact position of molded case circuit breaker, describes operating of contacts according to molded case circuit breaker of the present invention in detail with reference to Figure 12.

Figure 12 is for illustrating as user when operating grip moves to open position with its position under abnormality, according to the figure of the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of second embodiment of the invention.

When molded case circuit breaker carry out since fault current (for example, when the dropout that overcurrent etc.) causes is operated, even handle 6 is in dropout position shown in Figure 13 (centre position between make position and the open position), owing to contact fusing coherent condition or other reason, the contact of the contact of movable contactor 2 and fixed contact 1a, 1b does not have separated from one another, similar to closure state (Figure 10) therefore is in conducting state.Then, the user may be in trip status by the misidentification molded case circuit breaker, and attempts to carry out closed procedure.

Here, in order to switch the molded case circuit breaker of opening at trip status, handle 6 should at first be handled to move to open position (reset position), moves to make position then.

Therefore, user's control crank 6 moves to as shown in Figure 12 open position with its position.The action bars 7 that is connected on the handle 6 pivots (that is, the right side in Figure 12) so that be positioned at open position around pivotal axis 8 in the clockwise direction, therefore the action bars extension 7a of pivot action bar 7 (that is, to Figure 12 right side) in the clockwise direction.

Here, similar to the make position shown in Figure 13 along with each the contact of movable contactor 2 and fixed contact 1a, 1b is melted adhesion each other, an axle drive pin 3-1b (right side in the drawings) rises, and contact plate 10 rises.Therefore, along with the action bars extension 7a that is connected on the contact plate 10 rotates in the clockwise direction, contact plate 10 is in the clockwise direction around axle drive pin 3-1b rotation.

As shown in Figure 12, the contact lever 11 that is connected on the contact plate 10 rotates in the counterclockwise direction, and the nail rotating part 11b of contact plate 11 rotates in the counterclockwise direction, thereby compressing and rotation are positioned at the nail 12 of its rotational trajectory.

Therefore, when the compressing of the lower end of the nail 12 that is pivoted, latch fixation device 13 is in the counterclockwise direction around the rotation of latch fixation device back shaft (not shown).Along with latch fixation device 13 rotation, confined breech lock 14 is released (if be disconnected then be in release condition), thereby carries out the operation of threading off.

Melt each other in the state of adhesion in the contact of movable contactor 2 and the contact of fixed contact 1a, 1b, if being handled, handle 6 moves to open position (reset position), then toggle pin 4c maintenance position as shown in Figure 9 is so that be no more than pivotal axis 8 in the horizontal direction (promptly, toggle pin 4c is positioned at the left side of pivotal axis 8, as shown in Figure 9).

Therefore, the top of the dropout spring 9 that supported by toggle pin 4c of lower end is bent to right side (that is the right side among Figure 11 and 12) by the operation of the arrival open position of handle 6.If handle 6 is released at open position, the top that bends to the dropout spring 9 on right side is applied in elastic restoring force, described elastic restoring force is used for the lower left quarter of dropout spring is returned to rectilinear form, thereby automatically handle 6 is moved towards make position, therefore finishes operating of contacts.

The position according to molded case circuit breaker of the present invention (state) after carrying out operating of contacts is identical with the molded case circuit breaker that is in the close position shown in Fig. 8 or 9 and 10, thereby omits its detailed explanation.

Second embodiment of the invention, in the condition that the molded case circuit breaker with contact mechanism should be disconnected, when causing the contact not have even the user attempts handle is moved to reset position, can not carry out reset operation when separated from one another because contact fusing adheres to wait.If handle 6 is released, make position is instructed to, thereby notifies user's molded case circuit breaker to be switched on.Therefore, the user can correctly take required action for safety.

For example, by handling release unit previous stage such as the main circuit breaker in previous stage, the user can stop any further overcurrent conducting, and takes to move to separate and caused and carry out distribution, replacement, maintenance etc. by chaotic molded case circuit breaker.

Therefore, when the user handled and handles molded case circuit breaker, handle was in make position or towards the position of make position, indicating circuit is switched on, and therefore prevents the contingent electrification of use, so protects load equipment and life.

Below with reference to Figure 14 and 18 structure and the operations of describing in detail according to the molded case circuit breaker with contact mechanism of third embodiment of the invention.

Figure 14 and 15 is respectively the stereogram and the front view of structure that the molded case circuit breaker with contact mechanism that illustrates according to third embodiment of the invention is in the critical piece of ON state.

Be described in detail in the structure and the operation of the molded case circuit breaker of closure state below with reference to Figure 14 and 15.

Molded case circuit breaker according to third embodiment of the invention usually can comprise: a pair of fixed contact 1a, 1b; Movable contactor 2, it is movable to and fixed contact 1a, 1b position contacting, and the position of separating with fixed contact 1a, 1b; Switching mechanism (for example, comprise 3,3-1a, 3-1b, 4a, 4b, 4c, 6,7,8,9) is used to drive movable contactor 2 with fixed contact 1a, 1b contact or separate, so that the cut-off/close circuit; Limiting part (for example, comprising 13,14,15) is used to limit described switching mechanism; And handle 6, be used for the described switching mechanism of cut-off/close manually.

Molded case circuit breaker according to third embodiment of the invention can comprise especially: contact mechanism (for example, comprise 7-1,9,10,11,12), melt each other under the state of adhesion in the contact of movable contactor 2 and the contact of fixed contact 1a, 1b, when handle 6 is handled when moving to open position or reset position, described contact mechanism makes described switching mechanism thread off by discharging described limiting part, and handle 6 is automatically rotated towards make position, so that indication conducting state.

More particularly, molded case circuit breaker according to third embodiment of the invention can comprise handle 6, it can indicate the ON position of molded case circuit breaker closed circuit or molded case circuit breaker to disconnect the OFF position of the circuit that is connected, and the manual operation unit that is used to operate molded case circuit breaker is provided.

In addition, can comprise action bars 7 according to the switching mechanism of the molded case circuit breaker of third embodiment of the invention, the one end is connected on the handle 6, by pivoting with engaging of handle 6, and provides pivotal point to handle 6.

In addition, the switching mechanism according to the molded case circuit breaker of third embodiment of the invention can comprise: pivotal axis 8, the pivotal point that it is connected to the other end of action bars 7 and action bars 7 is provided; And side plate 5, support pivotal axis 8 with being used for fixing.Here, pivotal axis 8 for example may be embodied as the rivet that is fixed on the side plate.

In addition, can comprise according to the molded case circuit breaker of third embodiment of the invention: fixed contact 1a, 1b, it is connected to mains side or electrical load side; Movable contactor 2, it is movable to and fixed contact 1a, 1b position contacting and the position of separating with fixed contact 1a, 1b; Axle 3 is used to support movable contactor 2 and provides rotary driving force to movable contactor 2; And a pair of axle drive pin 3-1a, 3-1b, by it can pivot with axle 3 with the joint of axle 3, to be used for the multipole movable contactor 2 that drives simultaneously.

In addition, can comprise according to the switching mechanism of the molded case circuit breaker of third embodiment of the invention: lower link 4a, its lower end is connected to axle 3 so that provide rotary driving force to axle 3; Upper connecting rod 4b, it is connected by engaging with lower link 4a; Toggle pin 4c is used to connect the upper end of lower link 4a and the lower end of upper connecting rod 4b; And dropout spring 9, its two ends are supported by toggle pin 4c and handle 6 respectively, and dropout spring 9 is loaded flexible potential energy in make position, and discharges elastic potential energy in the dropout operating process, so that provide rotary driving force to axle 3.

Limiting part according to the molded case circuit breaker of third embodiment of the invention can comprise: breech lock 15 is used to limit dropout spring 9 so that the state that keeps being loaded; Latch fixation device 14 is movable to the position that is used to limit the position of breech lock 15 and is used for latch 14; And follow closely 13, its rotational trajectory that is arranged on latch fixation device 14 is interior so that compressing and pivotal latch fixture 14.

Contact mechanism according to the molded case circuit breaker of third embodiment of the invention can comprise:

Shooting parts (shooter) 12 move to the off-position thereby oppress described limiting part when its vertical moving with described limiting part;

Contact plate 10, it is connected to switching mechanism, and according to the operation of switching mechanism be guided in/below moves up;

Contact lever 11, it is touched plate 10 and rotatably supports, and provides actuating force so that its vertical moving thereby be used for oppressing described shooting parts when rotation to the shooting parts;

Action bars extension 7-1 extends from action bars 7, and melt under the state of adhesion each other in make position in the contact of movable contactor 2 and the contact of fixed contact 1a, 1b, handled when moving to open position (reset position) when handle 6, make shooting parts 12 move up so that limiting part is driven into the off-position by compressing and rotation contact lever 11; And

Dropout spring 9, its upper end is connected to handle 6, and is provided for switching mechanism is moved to the flexible drive power of dropout position when limiting part is moved to the off-position.

Making the contact of movable contactor 2 and the contact of fixed contact 1a, 1b not have in the state separated from one another because of contact fusing adhesion or any other reason, user's control crank 6 is to move to its position reset position (or open position).In order to indicate the conducting state of molded case circuit breaker, also should be provided for elastic force that handle 6 is automatically rotated towards make position under the state of handle 6 (that is, not having manual force) even discharged the user.For this reason, the horizontal level of toggle pin 4c that supports the lower end of dropout spring 9 should be in the left side of pivotal axis 8, as shown in Figure 15, so that it does not exceed the horizontal level of pivotal axis 8.

Vertically guide contact plate 10 for the pivot according to axle drive pin 3-1b moves, contact plate 10 forms has serpentine.The bottom of contact plate 10 is connected on a pair of axle drive pin 3-1b among drive pin 3-1a, the 3-1b.Guiding recess 10a is formed on the top of contact plate 10 in the horizontal direction.Supporting pin 5-1 among the guiding recess 10a of insertion contact plate 10 securely is arranged on the upper right side (shown in the figure) of side plate 5, so that support the top of contact plate 10.

Contact lever 11 is supported rotatably by the pivotal axis or the pivot supporting pin (Reference numeral does not provide) that are fixed on the contact plate 10.In this execution mode, contact lever 11 is to form to have approximate meniscate member, and comprise around pivotal axis rotation and bear from the actuating force of the rotary driving force of action bars extension 7-1 and bear portion, and actuating force is moved the actuating force transfer part that the actuating force that is delivered to shooting parts 12 is born the 12c of portion up by rotation.In addition, contact lever 11 can be positioned in the rotational trajectory of action bars extension 7-1 and be touched, to bear the rotary driving force from action bars extension 7-1.Yet whether contact lever 11 is operated the determining positions of bar extension 7-1 contact by the contact plate 10 that supports contact lever 11.

By the explanation of following closure, disconnection, dropout and operating of contacts, the such relativeness and the operation of action bars extension 7-1, contact plate 10 and contact lever 11 will be understood better to molded case circuit breaker of the present invention.

At this moment, can vertically move and rotate nail 13 shooting parts 12 member, and be included in the actuating force of extending in the rotational trajectory of an end of contact lever 11 and bear the 12c of portion for having approximate clavate by oppressing.The main part 12b that shooting parts 12 can comprise base portion 12a, extend up from base portion 12a, on longitudinally, bear the 12c of portion and be positioned at the top of main part and have sharp keen front end and be used for contact stud 13 so that the nail drive division 12d of the inclined surface of rotation nail 13 from the central part horizontal-extending of main part 12b so that be in actuating force in the rotational trajectory of an end of contact lever 11.

Can with reference to the patent No. of submitting on October 7th, 2004 by the inventor Korean Patent (the invention exercise question: the shooting parts that disclosed shooting parts are described to have such shape and structure the circuit breaker with pressure trip gear), and the structure that guides and support the vertical moving of such shooting parts of 10-0574423 in registration on April 20th, 2006.By the pressure of the arcing gas that produces when the contact separation, the shooting parts of being quoted are directed between the outer wall of two that are used for each electrode adjacent single disconnected utmost point parts (pole breaking unit) and vertically move (critical piece shown in Fig. 1 to 5 is structured in insulated case so that form independent disconnecting members for each utmost point).Such air pressure shooting parts also can be in the present invention with the shooting parts that act on operating of contacts.

Describe in detail when handle with reference to Figure 15 and to be handled with when the open position shown in Figure 16 moves to make position, according to the operation of molded case circuit breaker of the present invention.

As shown in Figure 16, if the user comes control crank 6 that its position is moved to make position from open position (reset position) by manual force, the toggle pin 4c that supports an end of dropout spring 9 moves obliquely down.Therefore, dropout spring 9 is tightened up and is loaded flexible potential energy.

Along with toggle pin 4c moves obliquely down, lower link 4a and upper connecting rod 4b are folded together at a certain angle, as shown in Figure 15.

Here, as shown in Figure 15, because toggle pin 4c moves obliquely down, lower link 4a moves down, and therefore, axle drive pin 3-1a (left side in Figure 15) rotates in the counterclockwise direction.

Then, on diametric(al), be positioned at the also rotation in the counterclockwise direction of another drive pin 3-1b of the opposite side of axle 3, therefore in lifting position, as shown in Figure 15.

3-1b moves to lifting position along with the axle drive pin, and an end is connected to the contact plate of drive pin 3-1b 10 and is directed recess 10a, latch 5-1 guiding, therefore moves up to be stopped then.

At the reset position shown in Figure 16, breech lock 14 is by 13 restrictions of latch fixation device.According to the operation of the arrival make position of handle 6, action bars 7 is (on the left direction in Figure 15) rotation in the counterclockwise direction, and the action bars extension 7-1 of action bars 7 (on the left direction in Figure 15) rotation also in the counterclockwise direction.Therefore, action bars extension 7-1 separates (separation) with contact lever 11, does not therefore contact each other.

Here, along with axle 3 rotates in the counterclockwise direction, movable contactor 2 contact fixed contact 1a, 1b.Then, fixed contact 1a, 1b electrically contact, thereby the circuit between closed mains side and the electrical load side, therefore are in conducting state.

At this moment, describe in detail according to the opening operation with molded case circuit breaker of contact mechanism of the present invention with reference to Figure 16.

In make position (Figure 15) or in the dropout position in the centre position of handle 6 between the closed and disconnected position (Figure 17), if the user moves to open position by manual force control crank 6 with its position, the upper end that is fixed to the dropout spring 9 on the handle 6 is moved to the right side among Figure 16.

The elastic restoring force that is used to recover its original rectilinear form then is applied to dropout spring 9, thereby as shown in FIG. the lower end of dropout spring is moved to the right side, and the toggle pin 4c that therefore will be used to support the lower end of dropout spring moves to the right side.

Along with upper connecting rod 4b rotates and lower link 4a rotates in the clockwise direction in the counterclockwise direction, upper connecting rod 4b and lower link 4a are folded together with certain included angle.Therefore, axle 3 is rotation in the clockwise direction, therefore has the off-state (circuit disconnection) that movable contactor 2 separates from fixed contact 1a, 1b.

Here, because breech lock 14 is limited by latch fixation device 13, dropout spring 9 is limited by being tightened up, so that dropout spring 9 keeps being loaded with the state of elastic potential energy.

4c is moved to the right side along with toggle pin, and the angle between lower link 4a and the upper connecting rod 4b is than littler (that is, lower link and upper connecting

rod

4a, 4b are closely folded) shown in Fig. 2.

That is, because toggle pin 4c moves to the right side, lower link 4a moves up from the position shown in Figure 15, and therefore, axle drive pin 3-1a (left side in Figure 16) rotates in the clockwise direction.

On diametric(al), be positioned at the also rotation in the clockwise direction of another drive pin 3-1b of axle 3 opposite side, thereby be in the down position shown in Figure 16, opposite with shown in Figure 15.

3-1b moves to down position along with the axle drive pin, and an end is connected to the contact plate of drive pin 3-1b 10 and is fixed on the latch 5-1 on the side plate 5 and guides recess 10a guiding, therefore descends obliquely.

At the reset position shown in Figure 16, breech lock 14 is by 13 restrictions of latch fixation device.According to the operation of the arrival open position of handle 6, action bars 7 is (on the right direction in Figure 16) rotation in the clockwise direction, and the action bars extension 7-1 of action bars 7 (on the right direction in Figure 16) rotation also in the clockwise direction.Here, because contact plate 10 moves down, have the contact lever 11 that is fixed to the pivotal axis on the contact plate 10 and also descend.Therefore, action bars extension 7-1 separates (separation) with contact lever 11, as shown in Figure 16.

Here, along with axle 3 rotates in the clockwise direction, the movable contactor 2 that is supported by axle 3 also rotates in the clockwise direction, thereby separates from fixed contact 1a, 1b.Then, fixed contact 1a, 1b electrically disconnect, thereby have disconnected the circuit between mains side and the electrical load side, so open circuit.

At this moment, describe in detail according to the dropout of molded case circuit breaker of the present invention operation with reference to Figure 17.

If because short trouble etc. have big electric current to flow through electric wire, between movable contactor 2 and fixed contact 1a, 1b, produce the electromagnetism mutual expelling force, thereby pass through to be separated and pivot movable contactor 2, thereby produced electric arc from fixed contact 1a, 1b.The arcing gas that is formed by the electric arc that produces and the air that centers on is discharged by the outlet (not shown) by instantaneous huge pressure.Shooting parts 12 with the bottom that communicates with described outlet are by the lifting of arcing gas pressure, thereby rotation nail 13.Therefore, along with the latch fixation device 14 that is rotated by the rotation of nail 13 is released from its restriction, dropout spring 9 discharges the elastic potential energy of its loading, thereby returns to its reset condition.The toggle pin 4c of lower end that is used to support dropout spring 9 is by lifting up.Lower link 4a rotates in the clockwise direction and upper connecting rod 4b rotates in the counterclockwise direction.Rotate in the counterclockwise direction by axle or pin (Reference numeral is not shown, but can with reference to the uppermost circle in the dashed circle in the upper connecting rod in Figure 17) by engaging the breech lock 15 is connected with upper connecting rod 4b.

Here, axle 3 rotates in the clockwise direction by axle drive pin 3-1a, drive pin 3-1a is connected on the lower link 4a of rotation in the clockwise direction, and the movable contactor 2 that is supported by axle 3 also rotates in the clockwise direction, thereby carries out the dropout operation that movable contactor 2 is separated from fixed contact 1a, 1b.

At this moment, describe operating of contacts in detail with reference to Figure 18 according to molded case circuit breaker of the present invention.

Figure 18 is handled when its position moved to disconnection (resetting) position for illustrating before carrying out operating of contacts in contact fusing coherent condition handle, according to the figure of the mode of operation of the critical piece of the molded case circuit breaker with contact mechanism of the present invention.

When molded case circuit breaker carry out since fault current (for example, when the dropout that overcurrent etc.) causes is operated, even handle 6 is in dropout position shown in Figure 17 (centre position between make position and the open position), but owing to the contact of the contact of any other reason movable contactor 2 and fixed contact 1a, 1b melt each other adhere to or do not have separated from one another, similar to the make position shown in Figure 15.Then, the user may think that molded case circuit breaker is in trip status by mistake, and attempts to carry out closed procedure.

Here, for closure is in the molded case circuit breaker of trip status, handle 6 at first should be handled to move to open position, move to make position then.

Therefore, user's control crank 6 moves to open position with its position.The action bars 7 that is connected on the handle 6 pivots (that is, to Figure 18 right side) so that be positioned at open position around pivotal axis 8 in the clockwise direction, therefore the action bars extension 7a of pivot action bar 7 on the clockwise direction in Figure 18.

Therefore here, along with the contact of movable contactor 2 and the contact of fixed contact 1a, 1b are melted adhesion each other, be in make position as shown in Figure 15, an axle drive pin 3-1b (right side in the drawings) rises, and contact plate 10 and contact lever 11 also rise.Therefore, the actuating force of contact lever 11 is born action bars extension 7-1 contact and the compressing that portion (left side in the drawings) is rotated in the clockwise direction, therefore makes contact lever 11 rotate in the counterclockwise direction.

Therefore, because contact lever 11 rotates in the counterclockwise direction, be used for oppressing actuating force up and bear the shooting parts 12 of the 12c of portion and moved up.Then, nail 13 is by the nail restrictions 12d compressing of shooting parts 12, thereby rotation in the clockwise direction.Latch fixation device 14 rotates in the counterclockwise direction.Therefore, be released by the breech lock 15 of latch fixation device 14 restriction and therefore bear actuating force by the elastic potential energy of dropout spring via upper connecting rod 4b, thereby rotation in the counterclockwise direction, thereby the operation of threading off carried out.Here, most of users are according to from sizable disconnection noise of switching mechanism and release lever 6, and this noise occurs in the dropout operating process.

Melt each other in the state of adhesion in the contact of movable contactor 2 and the contact of fixed contact 1a, 1b, toggle pin 4c keeps its position as shown in Figure 15, so that do not exceed pivotal axis 8 (that is, toggle pin 4c is positioned at the left side of pivotal axis 8 as shown in Figure 15) in the horizontal direction.

Therefore, the top of the dropout spring 9 that supported by toggle pin 4c of lower end is bent to right side (that is the right side among Fig. 5) by the operation of the arrival open position of handle 6.If handle 6 is released at open position, the top that bends to the dropout spring 9 on right side is applied in elastic restoring force, is used for the lower left quarter of dropout spring is reverted to rectilinear form, thereby makes handle 6 move automatically towards make position, therefore finishes operating of contacts.

The position according to molded case circuit breaker of the present invention (state) after carrying out operating of contacts is identical with the molded case circuit breaker that is in the close position shown in Figure 15, thereby omits its detailed explanation.

According to the present invention, in the condition that the molded case circuit breaker with contact mechanism should be disconnected, when causing the contact not have even the user attempts handle is moved to reset position, can not carry out reset operation when separated from one another because contact fusing adheres to wait.If handle 6 is released, make position is instructed to, thereby notifies user's molded case circuit breaker to be switched on.Therefore, the user can correctly take required action for safety.

The present invention can be implemented as various ways and can not deviate from its characteristic, also should understand unless otherwise indicated, above-mentioned execution mode is not limited to aforesaid any details, but should in the scope defined in its appending claims, understand widely, therefore drop on institute in the claim scope and change and revise, perhaps be equal to replacement and all contained by claims.

Claims

1, a kind of molded case circuit breaker, it comprises: fixed contact; Movable contactor, it is movable to and the described fixed contact position contacting and the position of separating from described fixed contact; Switching mechanism is used to drive described movable contactor to contact with described fixed contact or to separate so that disconnect or closed circuit; Limiting part is used to limit described switching mechanism; And handle, being used for manually disconnecting or closed described switching mechanism, described molded case circuit breaker comprises:

Contact mechanism, when being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, when described handle is moved to open position or reset position by manipulation, described contact mechanism makes described switching mechanism thread off by discharging described limiting part, and does not even make described handle rotate automatically so that the indication conducting state towards make position with manual force.

2, molded case circuit breaker according to claim 1, wherein said contact mechanism comprises:

Contact plate, the one end is connected to described switching mechanism, and is directed to and can vertically moves according to the driving of described switching mechanism;

Release lever, it is pivotally connected to the upper end of described contact plate, and drives described limiting part to the off-position;

Action bars, the pivotal point that it is connected to described handle and described handle is provided;

The operation lever pin, it is fixed to described action bars, melt each other in the state of adhesion in make position in the contact of described movable contactor and the contact of fixed contact, when described handle is handled when moving to open position (or reset position), described operation lever pin moves to the off-position by oppressing described release lever with described limiting part, thereby described switching mechanism is operated the dropout position; And

The dropout spring, its upper end is connected to described handle, and described dropout spring is included in the described switching mechanism, and when described limiting part is operated into the off-position, described dropout spring provides flexible drive power, is used for described switching mechanism is operated the dropout position

Wherein, the horizontal level of the strong point that supports the lower end of described dropout spring is positioned as the horizontal level of the pivotal axis that does not exceed described action bars, so that, when being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, even described handle is moved to reset position or open position by manipulation, also can be for rotating automatically that described handle provides elastic force so that the indication conducting state towards make position without manual force.

3, molded case circuit breaker according to claim 2, the pin that wherein said operation lever pin can be configured to separate perhaps is configured to the protuberance that forms by the relevant position of protruding described action bars.

4, a kind of molded case circuit breaker, it comprises: handle, it can indicate the ON position of molded case circuit breaker closed circuit or the OFF position of molded case circuit breaker open circuit, and the manual operation unit that is used for the manual operation molded case circuit breaker is provided; Action bars, the one end is connected to described handle, by engaging with described handle and rotate with described handle, and provides pivotal point to described handle; Pivotal axis, it is connected to the other end of described action bars so that provide pivotal point to described action bars; Side plate supports described pivotal axis with being used for fixing; Fixed contact, it is connected to mains side or electrical load side; Movable contactor, it can be pivoted to and the described fixed contact position contacting and the position of separating with described fixed contact; Axle is used to support described movable contactor and provides rotary driving force to described movable contactor; And a pair of axle drive pin, it is by rotating with the described axle of the described incompatible driving that is coupling, to be used for the multipole described movable contactor that drives simultaneously; Lower link, its lower end are connected in the described axle drive pin, so that provide rotary driving force to the axle drive pin; Upper connecting rod, it is connected by engaging with lower link; Toggle pin is used to connect the upper end of lower link and the lower end of upper connecting rod; Dropout spring, its two ends are supported by toggle pin and handle respectively, and the dropout spring is loaded with elastic potential energy in the ON position, and discharges elastic potential energy in the dropout operating process, so that provide rotary driving force to described axle; Breech lock is used to limit the dropout spring so that the state that its maintenance is loaded; The latch fixation device can be pivoted to the position of restriction breech lock and the position of latch; And nail, its pivotal path that is arranged on the latch fixation device is interior so that oppress and the pivotal latch fixture, and described molded case circuit breaker comprises:

Contact plate, its lower end are connected in the described axle drive pin one, and are directed to and can vertically move according to the rotation of described axle drive pin;

Release lever, it is connected the upper end of contact plate pivotly, and can discharge described nail with rotation; And

The operation lever pin, it is fixed to described action bars, and in the contact of the contact of described movable contactor and fixed contact when make position is in the state that a kind of fusing each other adheres to, when handle is moved to open position or reset position by manipulation, described operation lever pin rotates described nail by the compressing release lever, thereby make molded case circuit breaker thread off

The horizontal level of toggle pin that wherein supports the lower end of dropout spring is positioned as the horizontal level that does not exceed pivotal axis, so that, when being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, even handle is moved to reset position or open position by manipulation, also can be for rotating automatically that described handle provides elastic force so that the indication conducting state towards make position without manual force.

5, molded case circuit breaker according to claim 4, wherein, the pivot according to the axle drive pin vertically guides contact plate for moving, described side plate comprises guiding elongated hole and the outstanding latch that moves up with the restriction contact plate that is used for leading axle drive pin vertically, and described contact plate comprises elongated recess, is used for limiting moving up of contact plate around latch and by latch.

6, molded case circuit breaker according to claim 4, wherein be formed with hub portion as pivotal axis in the upper end of contact plate, and be formed with a pockets portion accordingly with described hub portion on release lever, so that release lever can be carried out pivoting action around the upper end of contact plate by center type.

7, molded case circuit breaker according to claim 4, wherein said contact plate comprises:

Connecting portion, it is arranged on the lower end of contact plate on longitudinally, and with the axle drive pin in one contact;

Elongated recess, it forms, and the central part from contact plate extends on longitudinally;

Hub portion, it is formed on the upper end of contact plate on longitudinally, and is used as the pivotal axis of release lever so that support release lever pivotly; And

Flange part, it radially extends from hub portion.

8, molded case circuit breaker according to claim 7, wherein said release lever comprises:

Axle pockets portion, it is arranged on release lever on longitudinally central part is used to hold the hub portion of contact plate;

The flange accommodation section is used to hold the flange of contact plate;

The nail restrictions, it forms, and the central part from release lever extends upward on longitudinally, and its position that can be pivoted to the position of the described nail of restriction or discharge described nail;

Actuating force is born portion, and its central part from release lever on longitudinally laterally extends so that bear rotary driving force; And

Weight balancing portion, its central part from release lever on longitudinally extends downwards so that as counterpoise.

9, molded case circuit breaker according to claim 4, the pin that wherein said operation lever pin can be configured to separate perhaps is configured to the protuberance that forms by the relevant position of protruding described action bars.

10, a kind of molded case circuit breaker, it comprises: fixed contact; Movable contactor, it is movable to and the described fixed contact position contacting or the position of separating from described fixed contact; Switching mechanism is used to drive described movable contactor to contact with described fixed contact or to separate so that disconnect or closed circuit; Limiting part is used to limit described switching mechanism; And handle, being used for manually operating described switching mechanism to open position or make position, described molded case circuit breaker comprises:

Contact mechanism, when being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, when described handle is moved to open position or reset position by manipulation, described contact mechanism makes described switching mechanism thread off by discharging described limiting part, and do not make with manual force that even described handle rotates automatically towards make position, described contact structures comprise:

Contact plate, the one end is connected to described switching mechanism, and is directed to and can vertically moves and pivot according to the driving of described switching mechanism;

Contact lever, it is pivotably connected to the upper end of described contact plate, and drives described limiting part to restriction site or off-position;

Action bars, it provides the pivotal point of described handle;

The action bars extension, it extends and is connected to described contact plate from action bars, when when being used for the ON position of closed circuit, being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, when control crank when moving to the OFF position that is used for open circuit or reset position, described action bars extension is by compressing and rotate described contact plate and rotate described contact lever, thereby described limiting part is manipulated to the off-position; And

The dropout spring, its upper end is connected to described handle, and described dropout spring is included in the described switching mechanism, and when described limiting part is moved to the off-position, described dropout spring provides flexible drive power for described switching mechanism being operated the dropout position

11, a kind of molded case circuit breaker, it comprises: handle, it can indicate the ON position of molded case circuit breaker closed circuit or the OFF position of molded case circuit breaker open circuit, and the manual operation unit that is used for the manual operation molded case circuit breaker is provided; Action bars, the one end is connected to handle, moves with described handle according to moving of handle, and provides pivotal point to described handle; Pivotal axis, it is connected to the other end of described action bars so that provide pivotal point to described action bars; Side plate supports described pivotal axis with being used for fixing; Fixed contact, it is connected to mains side or electrical load side; Movable contactor, it can be pivoted to and the described fixed contact position contacting and the position of separating with described fixed contact; Axle is used to support described movable contactor and provides rotary driving force to described movable contactor; A pair of axle drive pin, it is by rotating with the described incompatible and described axle that is coupling, to be used for the multipole described movable contactor that drives simultaneously; Lower link, its lower end are connected in the described axle drive pin, so that provide rotary driving force to the axle drive pin; Upper connecting rod, it is by engaging and interlocking with lower link; Toggle pin is used to connect the upper end of lower link and the lower end of upper connecting rod; Dropout spring, its two ends are supported by toggle pin and handle respectively, and the dropout spring is loaded with elastic force in the ON position, and discharges elastic force in the dropout operating process, so that provide rotary driving force to described axle; Breech lock is used to limit the dropout spring so that the state that its maintenance is loaded; The latch fixation device, it can be pivoted to the position of restriction breech lock or the position of latch; And nail, its pivotal path that is arranged on the latch fixation device is interior so that oppress and the rotating lock fixture, and described molded case circuit breaker comprises:

Contact plate, its lower end are connected in the described a pair of axle drive pin one, and move to be directed to vertically according to the pivot of described axle drive pin and move;

Contact lever, it is pivotably connected to the upper end of described contact plate, and compressing and rotate described nail; And

The action bars extension, it extends and is connected to described contact plate from described action bars, be used for compressing and rotate described contact plate, so that when being in the state that a kind of fusing each other adheres in the ON position in the contact of the contact of described movable contactor and fixed contact, when control crank moves to the OFF position, make described contact lever can oppress and rotate described nail;

Wherein, the horizontal level of toggle pin that supports the lower end of described dropout spring is positioned as the horizontal level that does not exceed described pivotal axis, so that, when being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, even described handle is moved to reset position or open position by manipulation, also can be for rotating automatically that described handle provides elastic force so that the indication conducting state towards make position without manual force.

12, molded case circuit breaker according to claim 11, wherein said contact lever comprises:

The nail rotating part, the end that it is arranged on contact lever is used to oppress described nail; With

Actuating force is born portion, and it is set to relative with described nail rotating part, and is giving prominence in the radial direction, so that bear rotary driving force from contact plate,

Wherein contact plate comprises the first guiding elongate aperture section of rotary middle spindle that is used to hold contact lever of vertical formation, and the second guiding elongate aperture section that is used to hold the protuberance of contact lever.

13, a kind of molded case circuit breaker, it comprises: fixed contact; Movable contactor, it is movable to and the fixed contact position contacting or the position of separating with fixed contact; Switching mechanism is used to drive movable contactor to contact with fixed contact or to separate, so that disconnect or closed circuit; Limiting part is used to limit described switching mechanism; And handle, be used for manually disconnecting or closed described switching mechanism; Action bars, the one end is connected to handle, moves with handle according to moving of handle is next, and provides pivotal point to handle, and described molded case circuit breaker comprises:

Contact mechanism, when being in the state that a kind of fusing each other adheres in the contact of the contact of movable contactor and fixed contact, when handle is moved to open position or reset position by manipulation, described contact mechanism makes described switching mechanism thread off by discharging described limiting part, and handle is automatically rotated towards make position without manual force, so that the indication conducting state, wherein said contact mechanism comprises:

The shooting parts move to the off-position thereby oppress described limiting part when its vertical moving with described limiting part;

Contact plate, it is connected to described switching mechanism, and according to the operation of switching mechanism be directed to last/below move up;

Contact lever, it is rotatably supported by described contact plate, provides actuating force so that its vertical moving thereby be used to oppress described shooting parts when rotation to the shooting parts;

The action bars extension, it extends from described action bars, and in the contact of the contact of movable contactor and fixed contact when make position is in the state that a kind of fusing each other adheres to, when handle is moved to open position or reset position by manipulation, make the shooting parts move up so that limiting part is driven into the off-position by compressing and rotation contact lever; And

The dropout spring, its upper end is connected to handle, and described dropout spring is included in the switching mechanism, and is provided for switching mechanism is moved to the flexible drive power of dropout position when limiting part is moved to the off-position,

Wherein, the horizontal level of the strong point that supports the lower end of described dropout spring is positioned as the horizontal level of the pivotal axis that does not exceed described action bars, thereby, when being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, even described handle is moved to reset position or open position by manipulation, also can be for rotating automatically that described handle provides elastic force so that the indication conducting state towards make position without manual force.

14, a kind of molded case circuit breaker, it comprises: handle, it can indicate the ON position of molded case circuit breaker closed circuit or the OFF position of molded case circuit breaker open circuit, and the manual operation unit that is used for the manual operation molded case circuit breaker is provided; Action bars, the one end is connected to handle, by engaging with handle and pivot with described handle, and provides pivotal point to described handle; Pivotal axis, it is connected to the other end of action bars so that provide pivotal point to described action bars; Side plate supports described pivotal axis with being used for fixing; Fixed contact, it is connected to mains side or electrical load side; Movable contactor, it can be pivoted to and the described fixed contact position contacting or the position of separating with described fixed contact; Axle is used for rotatably supporting described movable contactor and provides rotary driving force to described movable contactor; A pair of axle drive pin, it connects described axle and pivots with described axle, to be used for the multipole described movable contactor that drives simultaneously; Lower link, its lower end are connected in the described axle drive pin, so that provide rotary driving force to the axle drive pin; Upper connecting rod, it is by being connected and interlocking with lower link; Toggle pin is used to connect the upper end of lower link and the lower end of upper connecting rod; Dropout spring, its two ends are supported by toggle pin and handle respectively, and the dropout spring is loaded with elastic force in the ON position, and discharges elastic force in the dropout operating process, so that provide rotary driving force by in the axle drive pin another to described axle; Breech lock is used to limit the dropout spring so that the state that its maintenance is loaded; The latch fixation device, it can be pivoted to the position of restriction breech lock or the position of latch; And nail, its pivotal path that is arranged on the latch fixation device is interior so that oppress and the rotating lock fixture, and described molded case circuit breaker comprises:

The shooting parts are used for vertical moving and compressing and rotate described nail;

Contact plate, it is connected in the described a pair of axle drive pin one, and according to the rotation of axle drive pin be directed to last/below move up;

Contact lever, it is rotatably supported by contact plate, provides actuating force with the described shooting parts of vertical moving thereby be used for oppressing described shooting parts when rotation;

The action bars extension, it extends from described action bars, and in the contact of the contact of movable contactor and fixed contact when make position is in the state that a kind of fusing each other adheres to, when handle is moved to open position or reset position by manipulation, make the shooting parts move up so that oppress described nail by compressing and rotation contact lever;

Wherein, the horizontal level of toggle pin that supports the lower end of described dropout spring is positioned as the horizontal level that does not exceed described pivotal axis, thereby, when being in the state that a kind of fusing each other adheres in the contact of the contact of described movable contactor and fixed contact, even described handle is moved to reset position or open position by manipulation, also can be for rotating automatically that described handle provides elastic force so that the indication conducting state towards make position without manual force.

15, molded case circuit breaker according to claim 14, wherein in order vertically to guide contact plate, contact plate forms has serpentine, the bottom of contact plate is connected in the described a pair of axle drive pin one, and the upper level direction at contact plate is provided with the guiding recess, supporting pin in the guiding recess of insertion contact plate is fixed on the side plate, so that support the top of contact plate.

16, molded case circuit breaker according to claim 14, wherein said shooting parts comprise:

Base portion;

Main part, it extends up from pedestal;

Actuating force is born portion, and it is extending horizontally away from the central part of main part on longitudinally so that in the rotate path at an end of contact lever; And

The nail drive division, it is arranged at the top of main part, and has the inclined surface of sharp keen front end and contact stud so that the rotation nail.