CN2160982Y

CN2160982Y - Elastic switch knife

Info

Publication number: CN2160982Y
Application number: CN 93212823
Authority: CN
Inventors: 李修义
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-12
Filing date: 1993-05-12
Publication date: 1994-04-06
Anticipated expiration: 2003-05-12

Abstract

The utility model relates to an elastic knife switch which is the improvement of an ordinary HK type plate knife switch. An elastic sheet steel clip is additionally arranged on a static contact and the hole type connection mode is changed into the plane connection mode to solve the problem of the ordinary plate type knife switch of weak static contact copper elasticity and the problem of the hole type connection mode of the wire connecting terminal. Proved by the experiments, the utility model has the advantages of easy operation reforming scheme, simple operation, visual maintenance, low accident rate of the knife switch, and long service life.

Description

Elastic switch knife

It is novel that Elastic switch knife of the present utility model belongs to the improvement of common electrical appliance.

Original board-like HK type plug-in strip is by the fixed contact edge of a knife self elastic force clamping blade, by the two face contact conduction, copper material conducts electricity very well, but a little less than the elasticity, easily produces plastic deformation, plug-in strip does not reach the folding number of times as yet, the parallel edge of a knife of fixed contact has just become V-arrangement, can singe sparking during use, loose contact, even problem such as phase shortage.

In addition, the plug-in strip wiring is to adopt the binding post hole is inserted in the lead termination, uses the fastening mode of connection of screw again, when the weak point of this mode of connection is that the screw rotation presses down, easily makes lead cause mechanical damage; Lead can produce the two ends perk and reduce contact area, increase resistance, local overheating so that the accident of burning screw to death or the hole inside conductor being fractureed under the pressure of screw, this accident only is difficult for searching from outward appearance, often causes the single-phase operation of motor and burns out.

The purpose of this utility model is the Elastic switch knife that proposes a kind of property improved.

Improvement technical scheme of the present utility model is to carry out the clamping of suitable external force in the both sides of common plug-in strip fixed contact with elastic steel sheet, with the porous binding post of common plug-in strip, all changes the plane contact type binding post into again.

Accompanying drawing 1 is an Elastic switch knife fixed contact sectional drawing of the present utility model

(1) blade of knife switch, (2) fixed contact, (3) rigidity spring clip, (4) set bolt, (5) inlet wire plate (6) plug-in strip base plate.

Rigidity spring (3) is once to be stamped to form in suitable mould by elastic steel sheet, its shape and fixed contact (2) shape is similar, substantially be coated on the outside of fixed contact, its bottom corresponding positions is equipped with the hole, tightly is clamped on the relevant position of plug-in strip base plate (6) by set bolt (4) and inlet wire plate (5).This rigidity spring clip (3) leaves an initial spring folder mouthful width and just equates with the original Breadth Maximum of fixed contact.

Accompanying drawing 2 is Elastic switch knife end of incoming cables cutaway views

(1) fixing hole, (2) nut, (3) pad, (4) lead, (5) terminal openings.

The input terminal section configuration has fixing hole (1) and terminal openings (5);

Lead (4) bends to ring and is fixed on the terminals upper surface by nut (2) shimming precession terminal openings (5).

The fixed contact geomery of Elastic switch knife of the present utility model does not change, material is still used copper material, all electric properties that keep original product, only at fixed contact outside cover one resilient steel clip, this elastic force can remedy the flexible deficiency of copper material, the increase of chucking power, and the shunting action of steel class, can reduce the copper consumption about about 1/5 of fixed contact, the improvement main points of binding post of the present utility model are that the traditional approach with the wiring of hole nut changes the mechanical damage that the input terminal plane nut mode of connection can be avoided screw into, check the accident intuitive and convenient, can simplify the manufacturing process program again.

In sum, Elastic switch knife of the present utility model has kept the HK plug-in strip simple to operate, installs to be easy to advantage, and is easy to maintenance directly perceived, uses safety, and avoiding has also increased the plug-in strip opening/closing frequency simultaneously because reaching the bad loss that burns out motor of contact Contact in the hole.

Claims

1, a kind of Elastic switch knife, former common board-like plug-in strip, be that the some binding posts that install on the insulation porcelain plate all adopt the porous mode of connection, and the plug-in strip fixed contact of former common board-like plug-in strip is by self elastic force clamping guillotine type, and the feature of Elastic switch knife of the present utility model is to locate to be provided with resilient steel clip (3) and change terminals into the plane formula mode of connection by the hole shape mode of connection at plug-in strip fixed contact (2).

2, Elastic switch knife as claimed in claim 1 is characterized in that between the left and right sides intermediate plate of described resilient steel clip (3) the folder mouth width that equates with the original Breadth Maximum of fixed contact being arranged, and its relevant position, bottom has hole.

3, Elastic switch knife as claimed in claim 1 is characterized in that binding post passes through fixing hole (1) and is screwed on the plug-in strip base plate, and the pad (3) that lead (4) reaches in order to the crimping lead is screwed in terminal openings (5) by nut (2).