CN2144857Y

CN2144857Y - Safety knife-blade switch

Info

Publication number: CN2144857Y
Application number: CN 92246026
Authority: CN
Inventors: 吴清合
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-25
Filing date: 1992-12-25
Publication date: 1993-10-27
Anticipated expiration: 2002-12-25

Abstract

The utility model discloses an improved safety knife switch, being suitable for the control of low-voltage circuit whose voltage is lower than 10KW. The utility model is formed by that a safety cover which is made of flexible thin insulating boards is arranged on the outside of a rubber cover and on a handle; the safety cover is fixed on the rubber cover and the handle through two small holes and a big hole of the safety cover with a rubber cover screw and adhesives; electric arc generated on the switch can be isolated and denuded, when switching on and off the circuit of the wire joints; electricity leakage and the corrosion of internal parts which are caused by moisture or rain water are avoided when used in outdoors. Thus, the assurance of operators is improved; the service life of the knife switch is extended; the flexibility of operating the knife switch is not influenced.

Description

Safety knife-blade switch

The utility model relates to a kind of improved low-pressure electric controlled switch, is applicable to the control of circuit below 10 kilowatts.

The low pressure that the switches on and off series knife switch structure that is widely used in controlling the low-voltage circuit power supply at present is simpler, but because the knife switch handle has one section metal to expose between covering with glue, can bring danger to the operator when circuit is switched on or switched off; If during with the big electric current perceptual load circuit of the bigger motor power of knife switch rupturing capacity or other, can produce very strong electric arc, the life security that jeopardizes the operator often between blade and the cutter holder; When using in the open, the knife switch surface will if rainwater enters knife switch, will cause part corrosion in the glue lid because of moist or be drenched by rainwater and cause electric leakage, shorten the useful life of knife switch.

The utility model provides a kind of improved low pressure knife switch, overcomes above-mentioned deficiency thereby at the glue exterior surface one insulation safety cover is set.

The utility model is finished as follows: on the thin insulating plate of a quality softness that adapts with the knife switch size, open three holes in suitable position, two apertures of macropore other end of one end, macropore is enclosed within on the knife switch handle, use adhesive, two apertures are fixed on glue by following glue lid screw respectively and cover.The operator just can the false touch bare metal in operating process like this; Because load is excessive or the electric arc that is produced that opens circuit is also covered by safety guard, can not bring injury to the operator; When using, can prevent that rainwater from soaking knife switch and causing the electric leakage electric shock in the open.

The utility model has increased operator's safety guarantee owing to be provided with the insulation safety cover outside Jiao Gai He on the handle, has improved the useful life of knife switch, and console switch and replacing fuse are had no adverse effects.

Fig. 1 is the structural representation of guarded knife switch;

Fig. 2 is the safety guard structural representation.

Below in conjunction with accompanying drawing the technical program is described in further detail.

Intercept a flexible insulation plate as safety guard 4, as to adopt thickness be the rubber slab of 1～5mm, the glue lid width of its width and knife switch is suitable, length can be carried out the upper surface of covering glue lid 1 under the knife switch, gluing lid 3, handle 5 and base 7 fully, on safety guard 4, open two apertures 8, a macropore 9, two screws 2 under two aperture position and the knife switch on the glue lid 1 are corresponding, and macropore 9 positions are corresponding with the handle of handle 5; Macropore 9 is inserted in the handle of handle 5, at the contact position 6 usefulness adhesives of safety guard 4 with handle 5 safety guard 4 is clinged at handle 5 shoulders, and screw 2 is fixed on down glue by aperture 8 with safety guard 4 and covers.In handle 5 handle end through holes, pour into the paraffin of fusion, cause electric leakage to prevent rainwater from entering.

Claims

1, a kind of guarded knife switch, it comprises switch pedestal (7), gluing lid (3), following Jiao Gai (1), handle (5), it is characterized in that being provided with the safety guard made from the flexible insulation plate (4) at the outer surface of following Jiao Gai (1), gluing lid (3) and switch knob (5), the handle opposite position of safety guard (4) one ends and handle (5) is opened a macropore (9), macropore is enclosed within on the knife switch handle (5), and its contact position (6) cling with adhesive; Two apertures (8) are left in the position that safety guard (4) other end is corresponding with following Jiao Gai (1) two-screw (2), are fixed in down on the Jiao Gai (3) with screw (2).

2,, it is characterized in that safety guard (4) is to make with insulation TR thin rubber plate according to claims 1 described guarded knife switch.