CN2179629Y - Water-proof corrosion resistance and explosion resistance electrical knife switch - Google Patents

Abstract

The utility model relates to an electrical knife switch. A switch knife, a knife handle, a knife clamp and a bottom disk of the electric knife switch are made of nonconductive nonmetal. The core part of the knife handle is embedded with a permanent magnet, and the middle part of the bottom disk is additionally provided with a fully-enclosed switch box which is composed of a non-metal casing. The inner part of the box is provided with an electrical source contact which is composed of an elastic copper sheet and a small iron block together. When the utility model is used, the switching-on work and the switching-off work of the utility model depends on the permanent magnet in the knife handle driving the small iron block in the switch box to move up and down to complete. The utility model can resist corrosion because the metal part is not exerted, especially the contact of an electrical source is sealed in the switch box; so the utility model can be used for the environment of water and flammable and explosive gas.

Description

Water-proof corrosion resistance and explosion resistance electrical knife switch

The utility model relates to a kind of improved electric knife switch that uses, particularly a kind of electric knife switch with water-tight corrosion-proof explosion prevention function in supply line.

Existing knife switch mainly is made up of copper plug-in strip, cutter holder and nonmetallic handle of a knife, chassis.The switch of the HK model of China's production at present is exactly this knife switch.Because this switch has directly been formed power contact by plug-in strip and cutter holder, it is simple in structure, and is easy to use, can manually connect continually and the disjunction load current, is used widely in the usefulness electric line of low capacity.But this knife switch has such deficiency: all be exposed in the air owing to form the plug-in strip and the cutter holder of power contact, therefore meet water, meet tide short circuit easily, so this knife switch can not be used for that water is arranged, rainy and moist environment; This plug-in strip and cutter holder are all easily by the soda acid gas attack, so can not use in the environment of etchant gas is arranged; Have again, easily produce spark when plug-in strip contacts with cutter holder, therefore can not be used for the environment of flammable explosive gas.

The purpose of this utility model is that a kind of improved electric knife switch will be provided, and it has waterproof, explosion-proof, corrosion-resistant three anti-functions.

The purpose of this utility model is such: nonconducting nonmetallic materials manufacturing is all used on plug-in strip, handle of a knife, cutter holder and the chassis of electric knife switch, heart portion at handle of a knife imbeds permanent magnet, and at totally enclosed switch enclosure that is made of non-metal shell of the middle part on chassis increase, the power contact that is made of jointly elastic copper sheet and little iron block is equipped with in this box the inside.During use, its switch work is to finish by the little iron block that the permanent magnet that is embedded in the handle of a knife drives in the switch enclosure.Because the metal part that the utility model does not expose therefore can be anticorrosion, particularly the contact of power supply is sealed in the switch enclosure, and water advances not go, and the spark in the box can not run out yet, therefore in the environment that can be used for water being arranged or flammable explosive gas being arranged.

Because power contact of the present utility model is sealed in the switch enclosure, the exposed parts of its whole device all is by nonconducting nonmetal making, so safety when using can not make the human electric shock, also can not set off an explosion or fire because of producing spark.

Fig. 1 is an outside drawing of the present utility model.

Fig. 2 is a profile of the present utility model.

With reference to Fig. 1, a switch enclosure (6) is fixed on the middle part of chassis (4), two side ends of the box of switch enclosure (6) respectively have a thin minor axis Shen to go out, and hinged with the termination of a plug-in strip (1) separately through minor axis, another termination of these two plug-in strips (1) is fixed on the same handle of a knife (2).The first half of (4) has also been fixed cutter holder (3) on the chassis simultaneously, when plug-in strip (1) is pushed to the top, is just in time clamped by cutter holder (3).Each above-mentioned parts all use nonconducting nonmetallic materials to make.

With reference to Fig. 2, be embedded with permanent magnet (5) in the heart portion of handle of a knife (2).Upper end in switch enclosure (6) is fixed with elastic copper sheet (7) and (8), and the lower end is placed with little iron block (9) in this box.Its elastic copper sheet (7) and (8) all link with a lead separately, outside the other end outlet box of lead, and link with power supply and electrical appliance respectively.

The utility model is the same with existing common knife switch in use, handle of a knife (2) is pushed to the top, and plug-in strip (1) is clamped by cutter holder (2), at this moment the little iron block (9) in the switch enclosure (6) is attracted upwards by the permanent magnet (5) in the handle of a knife (2), and withstand elastic copper sheet (7) and (8), make power connection.When cutting off the power supply, only need handle of a knife (2) is left behind, little iron block (9) falls down under the acting in conjunction of gravity and magnetic force automatically, reaches the purpose of outage.

When contacting with minimizing, thermal oxidation produces spark in order to prevent that power contact from crossing, and can also be at switch enclosure (6) lining filling with inert gas.

Close well for the contact is touched, can also improve the electric conductivity of little iron block (9) with this at the outer surface plating layer of copper or the silver of little iron block (9).

Device described above is an individual event knife switch, increases to two groups as the power contact in the switch enclosure, has just become two knife switches.In like manner, also can become three or multinomial knife switch.

Claims (5)

1, a kind of electric knife switch, it is by plug-in strip (1), handle of a knife (2), cutter holder (3) and chassis (4) formation, it is characterized in that plug-in strip (1), handle of a knife (2), cutter holder (3) and chassis (4) all are to make with nonconducting nonmetallic materials, the heart portion of its handle of a knife (2) is embedded with permanent magnet (5), and on the chassis middle part of (4) has increased a totally enclosed switch enclosure (6) that is made of non-metal shell, the power contact by the common formation of elastic copper sheet (7), (8) and little iron block (9) is equipped with in switch enclosure (6) the inside.

2, switch according to claim 1, it is characterized in that the little iron block (9) that is fixed on elastic copper sheet (7), (8) of upper end in the switch enclosure (6) and is placed on lower end in the box has constituted one group of power contact jointly, its elastic copper sheet (7) and (8) all link with a lead separately, outside the other end outlet box of lead, and link with power supply and electrical appliance respectively.

3, switch according to claim 1 is characterized in that switch enclosure (6) the inside except that power contact is housed, also is filled with inert gas.

4,, it is characterized in that the outer surface of the little iron block (9) in the switch enclosure (6) is coated with good copper of one deck electric conductivity or silver according to claim 1,2 described switches.

5, according to claim 1,2 described switches, it is characterized in that the power contact in the switch enclosure (6) can be one group, also can be two groups, three groups or many groups.