CN201112310Y

CN201112310Y - Supercharge loading, short circuit, and low-voltage protection switch

Info

Publication number: CN201112310Y
Application number: CNU2007200288616U
Authority: CN
Inventors: 王顺波; 刘新会; 刘新江
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-27
Filing date: 2007-09-27
Publication date: 2008-09-10
Anticipated expiration: 2017-09-27

Abstract

The utility model relates to a protection switch for overloading, short circuit and undervoltage, which belongs to the field of electric switches. The protection switch of the utility model is provided with a shell. A button is installed over the shell, and a push rod, a spring, a moving contact and a static contact are arranged under the button. The technical characteristics of the utility model are that an iron rocker arm is installed at the lower side of the button and an electromagnet is fixed under the rocker arm. A power wire of the electromagnet is electrically connected with an overload disconnecting contact which is installed in the shell while another power wire of the electromagnet is connected with the static contact. The protection switch of the utility model aims at overcoming the defects that the existing switches can not automatically act with the changes of voltage and provides an overload and undervoltage protection switch which causes a power supply to be automatically disconnected when the overloading, short circuit or undervoltage occurs in electrical equipment.

Description

Overload, short circuit, under-voltage protection switch

Technical field

The utility model relates to the appliance switch field, says to be a kind of and the supporting unidirectional or bidirectional switch of low voltage equipment in detail.

Background technology

As everyone knows; woodworking machinery reaches the single-way switch (double-button) that uses on the relevant equipment; two-way contrary clockwise switch (three buttons) all is the mechanical switch of simple functions; do not transship; short circuit; the switch that under-voltage protection is multifunctional integrated; it is generally by shell; locking press button; push rod; moving contact; fixed contact is formed; because the self-locking action of button; in a single day shift knob is pressed; how the power supply of switching on changes it all can not be upspring automatically; thereby moving contact contacts with fixed contact all the time; can't auto power off under the voltage abnormal conditions; do not have protection machinery; the effect of electric equipment exists certain accident potential.

Summary of the invention

The purpose of this utility model with regard to be to overcome existing switch can not be with change in voltage the technical deficiency of auto-action, provide a kind of when electric equipment transships, when short circuit, undervoltage condition, overload, short circuit, the under-voltage protection switch of energy auto power off.

The technical scheme that the above-mentioned technical deficiency that solves the utility model adopts is: be provided with shell, the top of shell is equipped with button, the button below is provided with push rod, spring, moving contact, fixed contact, its technical characterictic is, the button lower position is equipped with the irony rocking arm; the below of rocking arm is fixed with electromagnet, and a power line of electromagnet is electrically connected with the overload outage contact of installing in the enclosure, and another root power line of electromagnet then is connected with fixed contact.

The beneficial effects of the utility model are; when circuit overloads takes place when; overload outage contact heating distortion contact disconnects, moment electromagnet lose magnetic force because of outage, in the reaction force acts lower moving contact and the fixed contact disengaging of spring; thereby power supply is disconnected; when circuit opened circuit or be under-voltage, electromagnet was inhaled incessantly rocking arm because of the suction that produces diminishes, under the effect of spring moving contact and fixed contact are broken away from; power supply is disconnected, thereby played protective effect.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1, structural representation of the present utility model also is the schematic diagram of a kind of embodiment.

1. shells among the figure 2. along button, 3. along pressing sheet, 4. stop button, 5. separate locking plate, 6. spring, 7. contrary button, 8. contrary locking plate, 9. intermediate, 10. rocking arm, 11. push rods, 12. electromagnet, 13. moving contact, 14. fixed contacts, 15. springs, 16. rocking arms, 17. push rod, 18. electromagnet, 19. overload outage contacts, 20. switch body, 21. fixed contacts, 22. springs.

Embodiment

As shown in Figure 1, it is the structural representation of a kind of order switch (three buttons), switch body 20 internal fixation have fixed contact 14, fixed contact 21, fixed contact 14, fixed contact 21 tops be equipped with can tilting moving contact 13, the downside at two ends, moving contact 13 left and right sides is fixed with spring 15 respectively, spring 22, switch body 20 snaps together with intermediate 9 and shell 1, the top of moving contact 13 left ends is provided with spring successively, push rod 11, the upper surface of electromagnet 12 is passed in the upper end of push rod 11, the top of moving contact 13 right-hand members is provided with spring successively, push rod 17, the upper surface of electromagnet 18 is passed in the upper end of push rod 17, electromagnet 12, electromagnet 18 is separately fixed at the position, the left and right sides of intermediate 9, a power line of electromagnet 12 and electromagnet 18 is electrically connected with the overload outage contact of installing in the enclosure 19, electromagnet 12 and electromagnet 18 another root power line then be connected with fixed contact 14 and fixed contact 21 respectively, electromagnet 12 tops, left side are fixed with rocking arm 10 through support; rocking arm 10 adopts the material of irony; the top in rocking arm 10 left sides is provided with along locking plate 3; be fixed on along on the button 2 along locking plate 3 upper ends; be installed in the top of shell 1 along button 2; electromagnet 18 tops in right side are fixed with rocking arm 16 through support; rocking arm 16 adopts the material of irony; the top on rocking arm 16 right sides is provided with contrary locking plate 8; contrary locking plate 8 upper ends are fixed on the contrary button 7; contrary button 8 is installed in the top of shell 1; rocking arm 16 left sides and rocking arm 10 right sides are interlaced; the top of its intervening portion is provided with separates locking plate 5; separate locking plate 5 upper ends and fixedly stop in the button 4, stops button 4 belows and is compressed with spring 6.

During the novel use of this reality, press along button 2, along the locking plate 3 descending rocking arms 10 of pressing, it is descending to promote push rod 11, moving contact 13 left contacts are contacted with fixed contact 14, and clockwise circuit is connected, and electromagnet 12 circuit are connected simultaneously, electromagnet 12 holds rocking arm 10, and the circuit of connection can not disconnected under the reaction of spring 15.Press stop button 4, it is descending to separate locking plate 5, separates locking plate 5 and presses rocking arm 10 right-hand members and make its left end leave electromagnet 12, and contact, moving contact 13 left side disconnects with fixed contact 14 under the reaction of spring 15, electromagnet 12 circuit disconnect simultaneously, and push rod 11, rocking arm 10, suitable locking plate 3, suitable button 2 reset.By subinverse button 7, contrary locking plate 8 is descending, and operation principle can be finished the connection that reverses circuit with pressing along button 2 programs.

Electric current is excessive when circuit overloads takes place, the 19 heating distortion of overload outage contact disconnect the contact, moment electromagnet 12 or electromagnet 18 lose magnetic force because of outage, moving contact 13 is disconnected, switch resets, and has only after overload outage contact 19 is removed overload with temperature decline auto-closing and can restart.

When short circuit, make electromagnet 12 or electromagnet 18 has lost electric current or electric current reduces, magnetic force is inhaled incessantly rocking arm 10 or rocking arm 16, and moving contact 13 is disconnected, and switch resets, and has only after short circuit is removed and can restart.

When power voltage insufficient, electromagnet 12 or electromagnet 18 do not live rocking arm 10 or rocking arm 16 because of the too small suction of magnetic force, and moving contact 13 is disconnected, and switch resets, and has only after supply voltage recovers normally and can restart.

The utility model also can be used for single-way switch (double-button), and its structural principle is identical with aforesaid order switch (three buttons) embodiment, has just lacked one group of button, by sheet, rocking arm, push rod, electromagnet, spring and fixed contact.

Claims

1, a kind of overload, short circuit, under-voltage protection switch; be provided with shell; the top of shell is equipped with button; the button below is provided with push rod, spring, moving contact, fixed contact; it is characterized in that: the button lower position is equipped with the irony rocking arm; the below of rocking arm is fixed with electromagnet, and a power line of electromagnet is electrically connected with the overload outage contact of installing in the enclosure, and another root power line of electromagnet then is connected with fixed contact.