CN203721664U

CN203721664U - Toggle switch capable of preventing over-current, over-voltage and short-circuit phenomena

Info

Publication number: CN203721664U
Application number: CN201420027276.4U
Authority: CN
Inventors: 葛剑优
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-01-02
Filing date: 2014-01-02
Publication date: 2014-07-16
Anticipated expiration: 2024-01-02

Abstract

Disclosed in the utility model is a toggle switch comprising a housing, a controller, a circuit board, an electromagnetic tripping mechanism, a static contact, a moving contact, a supporting seat and a protection circuit. The supporting seat is buckled at the housing. The controller includes a control pane, a wrenching head, and a spring; the control panel is locked and fixed at the outer side of the supporting seat; the wrenching head passes through the supporting seat and the control panel extends out of the outer side of the control panel; suspension loops are arranged in the wrenching head; and springs are respectively arranged at the two ends, corresponding to the wrenching head, of the supporting seat. The electromagnetic tripping mechanism includes a coil skeleton, a coil, a suspension mechanism, and a static iron core; the suspension mechanism includes a moving iron core, a permanent magnet, and a suspension body; the wrenching head is linked with the suspension mechanism; and the moving iron core arranged in the suspension mechanism to control closing and separation of the moving contact and the static contact by using the wrenching head. The provided toggle switch has the fireproof automatic power-off function; and when the circuit is in an over-current or over-voltage state, the moving contact and the static contact can be separated timely to form a power-off state, thereby substantially improving the using security.

Description

A kind of operating switch that prevents overcurrent, overvoltage and short circuit

Technical field

The utility model relates to a kind of electric prospection switch, relates in particular to a kind of operating switch that prevents overcurrent, overvoltage and short circuit.

Background technology

Existing operating switch only has simple on-off function; do not there is fire protection function, carry out power-off, the generation of Accident prevention and existing various fule shut-off valve is tripping mechanism by being arranged in switch; fault is manually pressed reset button after getting rid of, and tripping mechanism is resetted.For a long time not use if want, need use test switch to impel tripping mechanism dropout power-off, still power failure after user just leaves, the tripping mechanism that the is arranged at switch inside power-off of just cannot threading off, exists serious potential safety hazard.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of reasonable in design, safe and reliable, and has fire protection function, at the used time power operation of also can easily threading off not for a long time.

For solving the problems of the technologies described above, technical solution of the present utility model is: a kind of operating switch that prevents overcurrent, overvoltage and short circuit, comprise: housing, controller, circuit board, electromagnetic release mechanism, fixed contact and moving contact, also comprise supporting seat and protective circuit, described controller comprises control panel, pulling head and spring, control panel is locked in supporting seat outside, pulling head wears supporting seat and control panel stretches out control panel outside, in pulling head, be provided with hangers, the two ends corresponding to pulling head on supporting seat are respectively arranged with spring; Circuit board is arranged at the inner side of supporting seat, and is set up in the top of housing; Described electromagnetic release mechanism is arranged in housing, comprise coil rack, coil, hitch and static iron core, hitch comprises moving iron core, permanent magnet and suspension body, moving iron core and permanent magnet are arranged at and hang in body, static iron core is arranged in housing, and permanent magnet is arranged between moving iron core and static iron core by hitch; Fixed contact is for being obliquely installed on static contact, and moving contact is arranged on hitch, and setting corresponding with above-mentioned fixed contact.

Further, described coil rack is fixedly connected on circuit board.

Further, described coil comprises overvoltage coil and overcurrent coil, and overcurrent coil is set around on coil rack, and overvoltage coil is set around on overcurrent coil.

Further, described hitch hang in pulling head by hangers.

Further, described moving contact is for being actively located on above-mentioned hitch.

Further, on described moving contact, be also provided with compression spring.

Further, described supporting seat is fastened on housing.

Further, be also provided with 4 binding posts and 4 binding posts in described housing, 2 corresponding 2 binding posts of binding post are that wire enters terminal, and 2 corresponding 2 binding posts of terminals are wire terminals.

Adopt after such scheme, the beneficial effects of the utility model are not only to have fire prevention automatic circuit break function, and in the time of circuit generation overcurrent or overvoltage, dynamic and static contact can separately form off-position in time, have greatly improved the security performance using.

Brief description of the drawings

Fig. 1 is perspective view of the present utility model;

Fig. 2 is internal structure decomposing schematic representation of the present utility model;

Fig. 3 is hitch schematic diagram of the present utility model;

Fig. 4 is closing structure schematic diagram of the present utility model;

Fig. 5 is disjunction structural representation of the present utility model;

Fig. 6 is releasing structure schematic diagram of the present utility model;

Fig. 7 is circuit theory diagrams of the present utility model.

Main element symbol description

1, housing 11, binding post 12, binding post

2, controller 21, control panel

22, pulling head 221, hangers 23, spring

3, supporting seat 31, supporting bracket

4, electromagnetic release mechanism 41, coil rack

42, coil 421, overvoltage coil 422, overcurrent coil

43, hitch 431, suspension body 4311, hollow reservoir

432, moving iron core 433, permanent magnet 434, through hole

44, static iron core

5, circuit board 6, fixed contact 61, static contact

7, moving contact 71, compression spring

8, screw.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figures 1 to 6, what the utility model disclosed is that one prevents overcurrent, the operating switch of overvoltage and short circuit, comprise: housing 1, controller 2, circuit board 5, electromagnetic release mechanism 4, fixed contact 6 and moving contact 7, also comprise supporting seat 3 and protective circuit, controller 2 comprises control panel 21, pulling head 22 and spring 23, control panel 21 is locked in the outside of supporting seat 3 by screw 8, supporting seat 3 is provided with supporting bracket 31, pulling head 22 wore supporting bracket 31 and control panel 21 stretches out control panel 21 outsides, in pulling head 22, be provided with two relative hangers 221, on supporting seat 3, be respectively arranged with spring 23 corresponding to the two ends of pulling head 22, one end of spring 23 is arranged on supporting seat 3, the other end is arranged on pulling head 22, supporting seat 3 is fastened on housing 1, circuit board 5 is arranged at the inner side of supporting seat 3, and is set up in the top of housing 1, and protective circuit is arranged on circuit board 5, electromagnetic release mechanism 4 is arranged at the inside of housing 1, comprise coil rack 41, coil 42, hitch 43 and static iron core 44, coil rack 41 is fixedly connected on circuit board 5, on coil rack 41, be wound with coil 42, coil 42 comprises overvoltage coil 421 and overcurrent coil 422, overcurrent coil 422 is directly set around on coil rack 41, overvoltage coil 421 is set around on overcurrent coil 422, hitch 43 is connected with pulling head 22, hitch 43 hang on the inner relative hangers 221 arranging of pulling head 22, hitch 43 comprises moving iron core 432, permanent magnet 433 and suspension body 431, moving iron core 432 is arranged at and hangs in body 431 with permanent magnet 433, hang body 431 and be provided with hollow reservoir 4311, moving iron core 432 is inserted in the hollow reservoir 4311 hanging on body 431, permanent magnet 433 is arranged at and hangs in body 431, moving iron core 432 is normal sorption state with permanent magnet 433, static iron core 44 is arranged at the bottom in housing 1, permanent magnet 433 is arranged between moving iron core 432 and static iron core 44 by hitch 43, fixed contact 6 is for being obliquely installed on static contact 61, and moving contact 7 is for to be actively located in the through hole 434 of suspension body 431 lower ends of sundial suspension mechanism 43, and with the corresponding setting of above-mentioned fixed contact 6, on moving contact 7, be also provided with compression spring 71, in housing, being also provided with corresponding 2 binding posts 12 of 12,2 binding posts 11 of 11 and 4 binding posts of 4 binding posts is upstream end, and 2 corresponding 2 binding posts 12 of binding post 11 are exit.

Operation principle is as follows:

Manually pulling head can carry out open and close action to electrical appliance, as run into fault can automatic trip.

One, "on" position: the energising end of pressing pulling head 22, pulling head 22 is struck with moving iron core 432 simultaneously, and established by spring 23 cards, moving iron core 432 moves to fixed contact 6 with permanent magnet 433 simultaneously, because moving iron core 432 is to be all arranged in hitch 43 with permanent magnet 433, therefore also motion together simultaneously of hitch 43, and drive the moving contact 7 on hitch 43 to contact fixed contact 6, after dynamic and static contact, compression spring 71 is depressed, after moving contact 7 and fixed contact 6 closures, switch on power.

Two, off-position: the power-off end of pressing pulling head 22, pulling head 22 is struck with moving iron core 432 simultaneously, and established by spring 23 cards, moving iron core 432 and the end motion of 433 whiles of permanent magnet to static iron core 44, because moving iron core 432 is to be all arranged in hitch 43 with permanent magnet 433, therefore also motion together simultaneously of hitch 43, moving iron core 432 is now adsorbed by static iron core 44 with permanent magnet 433, and drive the moving contact 7 on hitch 43 to separate with fixed contact 6, moving, after fixed contact separates, after moving contact 7 separates with fixed contact 6, deenergization, now compression spring 71 is by moving contact 7 reset of upspringing.

Three, trip status: when circuit normal power-up state, because electromagnetic induction results from permanent magnet 433 opposite effect masterpieces for moving iron core 432, moving iron core 432 is attached together as normal condition with permanent magnet 433, in the time that circuit breaks down, coil L2 has electric current to pass through to produce and the magnetic field of the N utmost point and the S utmost point two like magnetic poles repel each other of permanent magnet 433, the repulsion producing is greater than the suction of permanent magnet 433, moving iron core 432 is ejected, moving iron core 432 after ejection is deviate from hitch 43, and permanent magnet 433 is adsorbed by static iron core 44, and drive on hitch 43 moving contact 7 to separate with fixed contact 6, moving, after fixed contact separates, compression spring 71 is upspring moving contact 7, after moving contact 7 separates with fixed contact 6, deenergization, protection electrical appliance also prevents fire.

Four, the operation principle of protective circuit:

1, leakage tests: in the time pressing testing button S1, simulate leakage current 5～10mA by resistance R 1, produce trigger signal source, zero-sequence transformer L1 just can induce an electrical leakage voltage signal, amplified by control chip ICl by partiting dc capacitor C4, relatively, upset, the 7th pin output high level of control chip ICl triggers controllable silicon SCR, controllable silicon SCR conducting, tripping coil L2 passes into positive half cycle current, produce the magnetic identical with permanent magnet 433 polarity, two like magnetic poles repel each other, permanent magnet 433 leaves moving iron core 432 and moves to static iron core 44, and be adsorbed on static iron core 44 (being also magnetic hold mode), permanent magnet 433 drives hitch 43 to move together, and drive the moving contact 7 on hitch 43 to leave fixed contact 6, moving, fixed contact separates, deenergization.

2, earth leakage protective: earth leakage protective principle is identical with leakage tests.

3, overvoltage protection, lightning protection and surge protection: the principle of overvoltage protection, lightning protection and surge protection is also identical with leakage tests, just trigger signal source is completed by piezo-resistance.

4, high temperature flameproof protection: high temperature fireproof process is also identical with leakage tests, just trigger signal source is by being completed by thermistor.

5, overcurrent (overload) flameproof protection: in the time that hand is pressed the energising end of pulling head 22, pulling head 22 is struck with moving iron core 432 simultaneously, press Anti-surging normally closed switch S3 simultaneously, the moment contacting with fixed contact 6 at moving contact 7, Anti-surging normally closed switch S3 disconnects, and when load energising, the surge that produces can not responded on tripping coil L2, in the time that hand leaves pulling head 22, surge is pass by, and Anti-surging normally closed switch S3 resets, if this back loading has overcurrent (overload) phenomenon, the over-current signal of tripping coil L2 induction is through diode D4, capacitor C 3 is amplified by control chip ICl, relatively, upset, the 7th pin output high level by control chip ICl triggers controllable silicon SCR, controllable silicon SCR conducting, tripping coil L2 passes into positive half cycle current, produce the magnetic identical with permanent magnet 433 polarity, two like magnetic poles repel each other, permanent magnet 433 leaves moving iron core 432 and moves to static iron core 44, and be adsorbed on static iron core 44 (being also magnetic hold mode), permanent magnet 433 drives hitch 43 to move together, and drive moving contact 7 on hitch 43 to leave stationary contact to nod 6, moving, fixed contact separates, deenergization.

6, short circuit flameproof protection: in the time there is short trouble in electrical appliance or circuit, short circuit tripping coil L3 by produce one with permanent magnet 433 same sexes and different in nature alternating magnetic field; When two like magnetic poles repel each other, moving iron core 432 can repel permanent magnet 433, deenergization.While exchanging the 50Hz opposite sex, moving iron core 432 can suck 20ms by permanent magnet 433, by the time after 20ms, permanent magnet 433 will be repelled, and deenergization, completes short circuit fire prevention process.(wire also carrys out not anxious heating, has just disconnected power supply, so be to cause fire for the short circuit of utmost point short time, the i.e. half cycle of 50Hz alternating current).

The utility model, to causing above-mentioned 5 kinds of principal elements of appliance fire accident, has the protective effect of breaking circuit.Its tripping operation speed is less than 25ms, the time of initiation fire accident is at least wanted 100ms, the speed of the utility model deenergization punctures electrical apparatus insulation than surge current or burns out fast several times to tens times of the speed of electronic component as can be seen here, that is to say that electrical appliance also is not electrically shocked to ruin, insulate completely also just not burnt out and tripped by electricity.Therefore say that it can eliminate the factor that causes fire in bud, and before apparatus failure do not get rid of, this moving seesaw-type Flameproof protection switch does not reset.The utility model residual operating current is 5～10mA, within human body is perfectly safe current range.Can play the safeguard protection effect in real safe meaning.

Above embodiment is preferred embodiment of the present utility model, only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that not departing from spirit and scope of the present utility model, can also make various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present utility model.

Claims

1. one kind prevents the operating switch of overcurrent, overvoltage and short circuit, comprise: housing, controller, circuit board, electromagnetic release mechanism, fixed contact and moving contact, it is characterized in that: also comprise supporting seat and protective circuit, described controller comprises control panel, pulling head and spring, control panel is locked in supporting seat outside, pulling head wears supporting seat and control panel stretches out control panel outside, in pulling head, be provided with hangers, two ends corresponding to pulling head on supporting seat are respectively arranged with spring, one end of spring is arranged on supporting seat, and the other end is arranged on pulling head; Circuit board is arranged at the inner side of supporting seat, and is set up in the top of housing; Described electromagnetic release mechanism is arranged in housing, comprise coil rack, coil, hitch and static iron core, coil is set around on coil rack, hitch comprises moving iron core, permanent magnet and suspension body, moving iron core and permanent magnet are arranged at and hang in body, hitch is connected with pulling head, and static iron core is arranged in housing, and permanent magnet is arranged between moving iron core and static iron core by hitch; Fixed contact is obliquely installed on static contact; Moving contact is arranged in the through hole of the lower end that hangs body, and setting corresponding with above-mentioned fixed contact.

2. a kind of operating switch that prevents overcurrent, overvoltage and short circuit according to claim 1, is characterized in that: described coil rack is fixedly connected on circuit board.

3. a kind of operating switch that prevents overcurrent, overvoltage and short circuit according to claim 1, is characterized in that: described coil comprises overvoltage coil and overcurrent coil, and overcurrent coil is set around on coil rack, and overvoltage coil is set around on overcurrent coil.

4. a kind of operating switch that prevents overcurrent, overvoltage and short circuit according to claim 1, is characterized in that: described hitch hang in pulling head by hangers.

5. a kind of operating switch that prevents overcurrent, overvoltage and short circuit according to claim 1, is characterized in that: described moving contact is for being actively located in the through hole of above-mentioned suspension body lower end.

6. according to a kind of operating switch that prevents overcurrent, overvoltage and short circuit described in claim 1 or 4, it is characterized in that: on described moving contact, be also provided with compression spring.

7. a kind of operating switch that prevents overcurrent, overvoltage and short circuit according to claim 1, is characterized in that: described supporting seat is fastened on housing.

8. a kind of operating switch that prevents overcurrent, overvoltage and short circuit according to claim 1, it is characterized in that: in described housing, be also provided with 4 binding posts and 4 binding posts, 2 corresponding 2 binding posts of binding post are that wire enters terminal, and 2 corresponding 2 binding posts of terminals are wire terminals.