CN203562356U

CN203562356U - Single-pole double-throw change-over switch

Info

Publication number: CN203562356U
Application number: CN201320690855.2U
Authority: CN
Inventors: 葛剑优
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-30
Filing date: 2013-10-30
Publication date: 2014-04-23
Anticipated expiration: 2023-10-30

Abstract

The utility model discloses a single-pole double-throw change-over switch comprising a housing, a controller, a circuit board, a change-over mechanism and two pairs of contacts. The circuit board is provided with an elastic sheet and an electromagnetic electrical apparatus release. The electromagnetic electrical apparatus release includes a coil frame, a coil, a permanent magnet, an iron core, a release hook and a pressure spring. The coil is wound on the coil frame. The permanent magnet is embedded into one end of the coil frame, and the iron core is at least partially disposed at the other end of the coil frame in a sliding manner. One end of the release hook is connected with the controller, the other end of the release hook is provided with a release groove, and the elastic sheet is inserted into the release groove. One end of the pressure spring is held onto the release hook and the other end of the pressure spring is held into an inner wall of the housing. The two pairs of contacts are a first static contact, a first moving contact, a second static contact and a second moving contact. The first moving contact and the second moving contact are arranged at two sides of the elastic sheet respectively. The first static contact is disposed on the circuit board and the second static contact is disposed in the inner wall of the housing.

Description

A kind of single-pole double throw change over switch

Technical field

The utility model relates to a kind of mains switch, relates in particular to a kind of single-pole double throw change over switch.

Background technology

Change over switch can be converted to one or several load circuit the electric elements of another one power supply from a power supply, single-pole double-throw switch (SPDT) belongs to the one in change over switch, single-pole double-throw switch (SPDT) is comprised of He Bu moved end, moved end, moved end is exactly so-called " cutter ", it should connect the inlet wire of power supply, other two ends are exactly the two ends of power supply output, namely so-called not moved end, they are connected with electrical appliance, effect: 1, can control power supply to two different direction outputs, that is to say and can be used for controlling two equipment; 2, also can control same equipment and do the use of conversion rotation direction.At present, use the place of single-pole double-throw switch (SPDT) more and more, in family and industrial production, all there is use, due to, the overload power utilization in city or short circuit now easily causes overcurrent or the overvoltage of circuit, thereby cause electrical appliance to burn, even initiation fire, has had a strong impact on normal use work and the useful life of electrical appliance.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of simple in structure, reasonable in design, safe and reliable single-pole double-throw switch (SPDT), can effectively prevent from burning electrical appliance because of circuit overcurrent or overpressure problems, greatly improve the fail safe of circuit and extended useful life of electrical appliance, avoided the fire causing because of short circuit.

For solving the problems of the technologies described above, technical solution of the present utility model is: a kind of single-pole double throw change over switch, comprise housing, controller, circuit board, switching mechanism and two pairs of contacts, and on described circuit board, be also provided with shell fragment and magnetictrip; Described magnetictrip comprises coil rack, coil, permanent magnet, iron core, trip dog and stage clip, described coil winding is on described coil rack, described permanent magnet embeds one end of described coil rack, described iron core is arranged in the described coil rack other end at least partly with sliding type, one end of described trip dog is connected with described controller, the other end is provided with dropout groove, described shell fragment inserts in described dropout groove, the top, one end of described stage clip is located on described trip dog, and other end top is located in described inner walls; Two pairs of described contacts be first determine contact, the first moving contact and second is determined contact, the second moving contact, the first moving contact and the second moving contact are arranged at respectively the both sides of described shell fragment, first determines contact is arranged on described circuit board, and second determines contact is arranged at described inner walls.

Further, described coil comprises overvoltage coil and overcurrent coil, and overvoltage coil is sheathed on the outside of overcurrent coil, and overcurrent coil is sheathed on coil rack.

Further, described coil rack is provided with 4 binding posts.

Further, described iron core is provided with push rod.

Further, the first described moving contact and first is determined between contact in normal closure state.

Further, described shell fragment is fine copper material.

Further, two pairs of described contacts be welded in respectively on shell fragment, in circuit board and housing.

Adopt after such scheme, coil of the present utility model can exceed while limiting in testing circuit overcurrent or overvoltage, active force to iron core strengthens suddenly, the pushing block that makes to be arranged on iron core promotes push rod by trip dog jack-up, thereby make trip dog and to be arranged at shell fragment on supporting plate separation, also and then power-off of down circuitry electrical appliance after separating, has greatly improved the fail safe of circuit and has extended useful life of electrical appliance, has avoided the fire causing because of short circuit.

Accompanying drawing explanation

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

Fig. 2 is implementation column one cross-sectional schematic of the present utility model;

Fig. 3 is implementation column two cross-sectional schematic of the present utility model;

Fig. 4 is implementation column three cross-sectional schematic of the present utility model;

Fig. 5 is circuit diagram of the present utility model.

Main element symbol description

1, housing 2, controller 3, switching mechanism

4, contact 41, first is determined contact 42, the first moving contact

43, second determines contact 44, the second moving contact

5, circuit board 51, shell fragment

6, magnetictrip

61, coil rack 611, binding post

62, coil 621, mistake pawl coil 622, overcurrent coil

63, permanent magnet 64, iron core 641, push rod

65, trip dog 651, dropout groove 66, pawl spring

67, fixed block

7, dropout control circuit.

Embodiment

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

As shown in Figure 1, what the utility model disclosed is a kind of single-pole double throw change over switch, comprises housing 1, controller 2, circuit board 5, switching mechanism 3 and two pairs of contacts 4, is also provided with shell fragment 51 and magnetictrip 6 on circuit board 5, magnetictrip 6 comprises coil rack 61, coil 62, permanent magnet 63, iron core 64, trip dog 65 and stage clip 66, coil rack 61 is provided with four binding posts 611, coil 62 is wound on coil rack 61, coil 62 comprised pawl coil 621 and overcurrent coil 622, overvoltage coil 621 is sheathed on the outside of overcurrent coil 622, overcurrent coil 622 is sheathed on coil rack 61, one end of permanent magnet 63 embeds one end of coil rack 61, the other end of permanent magnet 63 connects a fixed block 67, iron core 64 is arranged in coil rack 61 other ends at least partly with sliding type, iron core 64 is provided with push rod 641, one end of trip dog 65 is connected with controller 2, the other end is provided with dropout groove 651, shell fragment 51 inserts in dropout groove 651, shell fragment 51 is fine copper material, the top, one end of stage clip 66 is located on trip dog 65, other end top is located on housing 1 inwall, the two pairs of contacts 4 be first determine contact 41, the first moving contact 42 and second is determined contact 43, the second moving contact 44, the first moving contact 42 and the second moving contact 44 are arranged at respectively the both sides of shell fragment 51, first determines contact 41 is arranged on circuit board 5, second determines contact 43 is arranged at housing 1 inwall, the first moving contact 42 and first is determined between contact 41 in normal closure state, and the two pairs of contacts 4 are welded in respectively on shell fragment, in circuit board and housing

As shown in Figures 2 to 4, stir controller 2 downwards time, switching mechanism 3 makes first to determine contact 41 and the first moving contact 42 in normally off by trip dog 65, a wherein road power on circuitry, another road circuit is in off-position, stir controller 2 upwards time, switching mechanism 3 makes first to determine contact 41 and the first moving contact 42 contacts disconnections by trip dog 65, second determines contact 43 and the second moving contact 44 closures, just now the circuit of connecting is now in off-position, and just the circuit of off-position has now been switched on, when rectified current is by overcurrent coil 622, because electromagnetic induction produces with permanent magnet 63 opposite effect masterpieces for iron core 64, when electric current is greater than certain limit, the repulsion producing is greater than the suction of permanent magnet 63, iron core 64 ejects, 641 of push rods that are arranged on iron core 64 eject trip dog 65, thereby the shell fragment 51 that makes to insert in dropout groove 651 is deviate from, shell fragment 51 is deviate from the circuit auto-breaking of rear original connection circuit, be connected in the also auto-breaking of electrical appliance on this circuit, to protect the electrical appliance of normal use, greatly improve the fail safe of circuit and extended useful life of electrical appliance, avoided the fire causing because of short circuit simultaneously, the operation principle of overvoltage coil 621 is similar to overcurrent coil 622, just increase a resistance, transfer voltage to electric current, voltage is higher, the electric current of overvoltage coil 621 of flowing through is also just larger, the repulsion producing is also just larger, iron core 64 can be ejected equally, 641 of push rods on iron core 64 eject trip dog 65, thereby the shell fragment 51 that makes to insert in dropout groove 651 is deviate from, shell fragment 51 is deviate from the circuit auto-breaking of rear original connection circuit, be connected in the also auto-breaking of electrical appliance on this circuit, and the stage clip 66 being arranged between trip dog 65 and housing 1 inwall can push up back trip dog 65 again, after pushing up back, shell fragment 51 can reinsert in dropout groove 651, wherein set of circuits is switched on again, now only need reopen electrical appliance.

As shown in Figure 5, diode D1, D2 forms rectification circuit, the alternating current of input is become to output direct current, the output of power supply is connected with the input of controller 2, dropout control circuit 7 comprises overvoltage coil 621, overcurrent coil 622, first determines contact 41, the first moving contact 42 and second is determined contact 43, the second moving contact 44, the output of controller 2 is connected with the input of overcurrent coil 622 with overvoltage coil 621, overvoltage coil 621 is connected with the input of two pairs of contacts 4 with the output of overcurrent coil 622, in order to control first, determine contact 41, the first moving contact 42 and second is determined contact 43, the separation of the second moving contact 44 is with closed, first determines contact 41 and second determines the output of contact 43 and is connected respectively different electrical appliances, on figure, be also connected with fuse FU and normally closed tongue tube, when electric current exceedes setting, the heat that electric current produces with itself makes melt fusing open circuit, in order to the safety of protective circuit and electrical appliance, normally closed tongue tube can be used as transducer and uses, when after normally closed tongue tube energising, magnetic field makes reed magnetization, the contact of reed will induce opposite polarity magnetic pole, because pole polarity attracts each other mutually on the contrary, when the magnetic force attracting exceedes the drag of reed, the contact separating just can adhesive, when magnetic force is reduced to certain value, under the assorted use of reed drag, contact returns to again initial condition, to reach the object of open circuit, in order to the safety of protective circuit and electrical appliance, has avoided the fire causing because of short circuit.

Above embodiment is preferred embodiment of the present utility model, instrument is 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 sticky god of the present utility model and scope, 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. a single-pole double throw change over switch, comprises housing, controller, circuit board, switching mechanism and two pairs of contacts, it is characterized in that: on described circuit board, be also provided with shell fragment and magnetictrip; Described magnetictrip comprises coil rack, coil, permanent magnet, iron core, trip dog and stage clip, described coil winding is on described coil rack, described permanent magnet embeds one end of described coil rack, described iron core is arranged in the described coil rack other end at least partly with sliding type, one end of described trip dog is connected with described controller, the other end is provided with dropout groove, described shell fragment inserts in described dropout groove, the top, one end of described stage clip is located on described trip dog, and other end top is located in described inner walls; Two pairs of described contacts be first determine contact, the first moving contact and second is determined contact, the second moving contact, the first moving contact and the second moving contact are arranged at respectively the both sides of described shell fragment, first determines contact is arranged on described circuit board, and second determines contact is arranged at described inner walls.

2. a kind of single-pole double throw change over switch according to claim 1, is characterized in that: described coil comprises overvoltage coil and overcurrent coil, and overvoltage coil is sheathed on the outside of overcurrent coil, and overcurrent coil is sheathed on coil rack.

3. a kind of single-pole double throw change over switch according to claim 1, is characterized in that: described coil rack is provided with 4 binding posts.

4. a kind of single-pole double throw change over switch according to claim 1, is characterized in that: described iron core is provided with push rod.

5. a kind of single-pole double throw change over switch according to claim 1, is characterized in that: the first described moving contact and first is determined between contact in normal closure state.

6. a kind of single-pole double throw change over switch according to claim 1, is characterized in that: described shell fragment is fine copper material.

7. a kind of single-pole double throw change over switch according to claim 1, is characterized in that: two pairs of described contacts are welded in respectively on shell fragment, in circuit board and housing.