CN201022056Y

CN201022056Y - An electric tool start switch with instant action capability

Info

Publication number: CN201022056Y
Application number: CNU200620126862XU
Authority: CN
Inventors: 吴世清
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-27
Filing date: 2006-10-27
Publication date: 2008-02-13
Anticipated expiration: 2016-10-27

Abstract

The utility model relates to an electric tool start switch with an instantaneous action ability, which comprises a base (17), a cover board (1), a push button (20), a push rod (14), a fixed contact (4), a moving contact (8), a lock knob assembly (16) and two pairs of input wiring assemblies and output wiring assemblies, wherein the moving contact (8) is bar-shaped and sheet-like and is adjacently arranged on one side of the push rod (14) in the push rod slide cavity (23) in a form of a seesaw, and the fulcrum is arranged on the other side of the push rod (14) relative to the moving contact (8) and is connected with the input wiring assembly. The push rod (14) is provided with a convex slider (11) which leans against the moving contact (8) in a way of elastically sliding. When the slider (11) slides over the fulcrum along with the up-and-down movement of the push rod (14), the moving contact (8) can warp up or press down under the effect of the elastic force in an instant, thereby reaching the goal of acting instantaneously.

Description

A kind of electric tool starting switch with instantaneous operation ability

Technical field

The utility model relates to a kind of electric tool starting switch with instantaneous operation ability.

Background technology

The electric tool starting switch is because it is used for the electric tool of inductive load, work under bad environment, the words of comparing with general other starting switch, its special requirement is arranged on some performances, very big as starting current, be generally more than 6 times of operating current, need the performance of higher shock-resistant electric current; In addition, contact also needs to have the ability of snap action, to prevent the arcing phenomenon, has shortened the useful life of starting switch, even causes the damage of electric tool; The electric tool operational environment all compares badly usually in addition, and good sealing be arranged.The structure of existing electronic starting switch generally includes pedestal, cover plate, two groups of fixed contacts, one group of moving contact, push rod, button, cage knob, in-out box and back-moving spring etc.Each is provided with a fixed contact every group of fixed contact two ends, the fixed contact of two groups of fixed contacts is fixed in the pedestal inner chamber relatively, one on the other, moving contact is fixed on the push rod and is between two groups of fixed contacts, and the top and bottom, two ends are provided with and are equipped with moving contact, forms doube bridge formula structure with fixed contact.When pressing the switch knob, push rod drives moving contact and moves to fixed contact, and its closing speed by the speed decision of pressing down, does not have the ability of instantaneous operation, and used 8 contacts fully, the cost height, and assembling is complicated, and sealing property can not reach requirement.

Summary of the invention

The purpose of this utility model be for overcome the deficiencies in the prior art provide a kind of simple in structure, cost is lower, good seal performance and electric tool starting switch with instantaneous operation ability.

For achieving the above object, electric tool starting switch with instantaneous operation ability of the present utility model, comprise pedestal, the cover plate button, push rod, fixed contact, moving contact, the cage knob assembly and the two pairs of input wires assemblies and output connection assembly, it is characterized in that: described pedestal inner push-rod both sides are provided with dividing plate and form the pusher slide chamber with cover plate, both sides outside the pusher slide chamber are respectively equipped with input wires assembly and output connection assembly cavity volume, input wires assembly and output connection assembly are separately positioned on separately in the cavity volume, described wherein a pair of input wires assembly and output connection inter-module are provided with conductive connecting piece and directly are electrically connected, described moving contact is the bar shaped sheet, become seesaw form close neighbour to be arranged on a side of push rod in the pusher slide chamber, its fulcrum is arranged on moving contact and is electrically connected with respect to the opposite side of push rod and with the input wires assembly of another centering, described push rod be provided with protrusion the slide block Elastic Sliding be resisted against on the moving contact, moving contact is arranged on the end of moving contact, described fixed contact passes dividing plate from a side and enters the pusher slide chamber, the end fixed contact is relative with moving contact, described pusher slide chamber entrance point is provided with annular groove, be arranged with the ring packing bowl on the push rod, the edge of obturating cup is embedded in groove.

The utility model beneficial effect compared with prior art is: because moving contact is the bar shaped sheet, become seesaw form close neighbour to be arranged on a side of push rod in the pusher slide chamber, flexibly be resisted against on the moving contact and push rod is provided with the slide block of protrusion, like this when slide block with push rod move up and down and when slipping over fulcrum, effect lower moving contact at elastic force will upwarp or press down moment, thereby reaches the purpose of instantaneous operation.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Accompanying drawing 1 removes internal structure schematic perspective view behind the cover plate for the utility model specific embodiment;

Accompanying drawing 2 is the utility model specific embodiment STRUCTURE DECOMPOSITION schematic diagram;

Embodiment

As shown in Figure 1, the electric tool starting switch still comprises pedestal 17, cover plate 1, button 20, push rod 14, a fixed contact 4, a moving contact 8, the cage knob assembly 16 and the two pairs of input wires assemblies and output connection assembly, pedestal 17 is roughly rectangle, push rod 14 front ends are inserted to pedestal 17 inner chambers from the top perforate, push rod 14 both sides are provided with dividing plate 22 and form pusher slide chamber 23 with cover plate 1,23 outer both sides, pusher slide chamber are respectively equipped with two pairs and are input wires assembly and the output connection assembly cavity volume that distributes up and down, input wires assembly and output connection assembly are separately positioned on separately in the cavity volume, the a pair of input wires assembly of its middle and lower part and output connection inter-module are provided with conductive connecting piece 2 and directly are electrically connected as electric-conductor, conductive connecting piece 2 two ends are inserted into respectively in input wires assembly and the output connection assembly cavity volume, moving contact 8 is the bar shaped sheet, moving contact 7 is arranged on the end of moving contact 8, be provided with the Z-shaped moving contact rack 3 that conductive metal sheet is made in the pusher slide chamber 23, pusher slide chamber 23 both sides dividing plates 22 are provided with grooving, moving contact rack 3 two ends are embedded in the grooving, wherein an end is inserted in the input wires assembly cavity volume on top, also being provided with the breach that matches with push rod 14 gaps on the moving contact rack 3 passes for push rod 14, moving contact 8 leans against the fulcrum that is made of breach on one side and becomes seesaw form close neighbour to be arranged on a side of push rod 14 in the pusher slide chamber 23, its fulcrum is arranged on the opposite side of moving contact 8 with respect to push rod 14, moving contact 8 is electrically connected by the fulcrum of moving contact rack 3 breach formation and the input wires assembly of another centering, fixed contact 4 passes dividing plate 22 from an end and enters pusher slide chamber 23, end fixed contact 5 is relative with moving contact 7, the other end is inserted in the output connection assembly cavity volume on top, push rod 14 end face are provided with the slide block storage chamber 21 of indent to a side of moving contact 8, the slide block storage is inserted compression spring 12 and slide block 11 in the chamber 21 successively, slide block 11 flexibly is resisted against on the moving contact 8 under the effect of compression spring 12, the perforate of pusher slide chamber 23 entrance points is provided with annular groove 24, be arranged with ring packing bowl 15 on the push rod 14, the edge of obturating cup 15 is embedded in groove 24.Two input wires assemblies respectively comprise binding post 10 and the U-shaped reed 9 that has jack, compresses screw, two U-shaped reeds 9 are inserted in respectively between moving contact rack 3 and binding post 10 and conductive connecting piece 2 and the binding post 10, and the two ends of U-shaped reed 9 are flexibly pressed and constituted electrical communication thereon; Be provided with pressure-ray film 6 in the output connection assembly cavity volume, pressure-ray film 6 one ends are fixing in the outer part, and the free end of other end slopes inwardly and flexibly is pressed in fixed contact 4 and the conductive connecting piece 2 that electric-conductor promptly is inserted into respectively in the output connection assembly cavity volume up and down and constitutes fast-wiring mechanisms; As shown in Figure 2, the side is provided with the fixture block 19 of a plurality of projectioies around on the pedestal 17, fixture block 19 can be right-angled triangle or be that the convex tendon on inclined-plane constitutes towards cover plate 1 one sides, cover plate 1 and the vertical buckle leg 18 that is integrally formed with in fixture block 19 corresponding positions, buckle leg 18 is provided with the draw-in groove 13 that matches, and described draw-in groove 13 constitutes snap device with fixture block 19.

Claims

1. electric tool starting switch with instantaneous operation ability, comprise pedestal (17), cover plate (1), button (20), push rod (14), fixed contact (4), moving contact (8), the cage knob assembly (16) and the two pairs of input wires assemblies and output connection assembly, it is characterized in that: described pedestal (17) inner push-rod (14) both sides are provided with dividing plate (22) and form pusher slide chamber (23) with cover plate (1), outer both sides, pusher slide chamber (23) are respectively equipped with input wires assembly and output connection assembly cavity volume, input wires assembly and output connection assembly are separately positioned on separately in the cavity volume, described wherein a pair of input wires assembly and output connection inter-module are provided with conductive connecting piece (2) and directly are electrically connected, described moving contact (8) is the bar shaped sheet, become seesaw form close neighbour to be arranged on a side of push rod (14) in the pusher slide chamber (23), its fulcrum is arranged on moving contact (8) and is electrically connected with respect to the opposite side of push rod (14) and with the input wires assembly of another centering, described push rod (14) be provided with protrusion slide block (11) Elastic Sliding be resisted against on the moving contact (8), moving contact (7) is arranged on the end of moving contact (8), described fixed contact (4) passes dividing plate (22) from a side and enters pusher slide chamber (23), end fixed contact (5) is relative with moving contact (7), described pusher slide chamber (23) entrance point is provided with annular groove (24), be arranged with ring packing bowl (15) on the push rod (14), the edge of obturating cup (15) is embedded in groove (24).

2. the electric tool starting switch with instantaneous operation ability according to claim 1, it is characterized in that: be provided with the Z-shaped moving contact rack (3) that conductive metal sheet is made in the described pusher slide chamber (23), described pusher slide chamber (23) both sides dividing plates (22) are provided with grooving, moving contact rack (3) two ends are embedded in the grooving, also being provided with the breach that matches with push rod (14) gap on the moving contact rack (3) passes for push rod (14), moving contact rack (3) one ends and another input wires assembly are electrically connected, described moving contact (8) leans against breach and goes up the formation fulcrum on one side, described push rod (14) end face is provided with the slide block storage chamber (21) of indent to a side of moving contact (8), inserts compression spring (12) and slide block (11) in the slide block storage chamber (21) successively.