CN201252006Y

CN201252006Y - Pressing line structure of electric tool switch

Info

Publication number: CN201252006Y
Application number: CNU2008200879324U
Authority: CN
Inventors: 王挺; 刘振伟
Original assignee: NINGHAI HANXIN MECHANICAL AND ELECTRICAL CO Ltd
Current assignee: NINGHAI HANXIN MECHANICAL AND ELECTRICAL CO Ltd
Priority date: 2008-05-23
Filing date: 2008-05-23
Publication date: 2009-06-03
Anticipated expiration: 2018-05-23

Abstract

The utility model relates to a pressing line structure of electric tool switch comprising a switch substrate and two groups of binding posts embedded on both sides of the switch substrate, each group of static contact sheets with static contacts and dynamic contact sheets provided with dynamic contacts and hinged on a conductive supporting stand are connected with corresponding binding posts. Horizontal line-inserting holes and vertical screw holes are arranged on the binding posts, and the static contacting sheets and bending portions on the rear end of the conductive supporting stand respectively penetrate through the line-inserting holes on the corresponding binding posts, and the dynamic contacts and the static contacts are led to be opposite, wires are respectively inserted in the line-inserting holes of the binding posts, and arranged on the lower portions of the static contacting sheets and the bending portion of the conductive supporting stand. The wires, the static contacting sheets and the bending portion of the conductive supporting stand are pressed by pressing-line screws in the screw holes, and the static contacting sheets, the bending portion of the conductive supporting stand and walls of the line-inserting holes are pressed by the pressing-line screws. The pressing line structure of electric tool switch directly fixes wires on the static contacting sheets and a mobile supporting stand through the pressing-line screws, reduces contact points, lowers contact resistance, and avoids the problem of temperature rising caused by imperfect riveting.

Description

A kind of pressuring line structure of electric tool switch

Technical field

The utility model relates to a kind of electric tool switch, specifically a kind of wiring construction that is used for electric tool switch.

Background technology

Existing electric tool switch is to adopt to be riveted on respectively on the corresponding binding post with the static contact of fixed contact, the conducting bracket that links to each other with moving contact, then lead is inserted the plug wire hole that is opened on the binding post, compress with the line ball screw again, link to each other with conducting bracket with corresponding static contact by binding post respectively with these two leads.The shortcoming of this mode of connection is that static contact, moving support and binding post riveting are loosening easily, in case the not firm meeting of riveting causes the temperature of switch to raise, thereby influences the operate as normal of electric tool switch.And lead will be connected to contact by binding post, increased contact resistance, and binding post often adopts the higher hard drawing brass of cost to make, and contains a large amount of lead as harmful matter in this hard drawing brass.

Summary of the invention

The purpose of this utility model is that at the defective of above-mentioned prior art and deficiency a kind of contact resistance is little, the wiring construction of environmental protection for electric tool switch provides.

Technical solution adopted in the utility model is for achieving the above object: the two winding terminals that the pressuring line structure of this electric tool switch comprises switch base and is flush-mounted in the switch base both sides, the static contact of every group of band fixed contact links to each other with corresponding binding post with the movable contact spring of drive contact on being hinged on conducting bracket, offer the plug wire hole of level and vertical screw hole on the described binding post, the rear end kink of described static contact and conducting bracket passes the plug wire hole on the corresponding binding post respectively;

Lead is interspersed in respectively in the binding post plug wire hole, be positioned at the below of static contact and conducting bracket kink, line ball screw in the screw hole compresses the kink of lead and static contact, conducting bracket, and the kink and the plug wire hole wall pressure of static contact, conducting bracket is tight;

The contact-making surface of the plug wire hole of described binding post and static contact, conducting bracket kink is the plane;

The back side of the static contact in the described plug wire hole and the back side of conducting bracket are evenly equipped with the strip groove vertical with plug wire hole;

Described binding post adopts aluminium or iron to make.

The utility model kink by the line ball screw that lead is direct and static contact and conducting bracket presses, reduced contact point, reduced contact resistance, avoided because of riveting the bad temperature rising problem that causes, the strip groove that is arranged on the static contact back side and the conducting bracket kink back side can make line ball more firm, because lead does not pass through binding post with being connected of fixed contact, moving contact, therefore pairs of posts does not have the electric conductivity requirement, can adopt the low materials of lead tolerance such as aluminium, iron, to meet environmental protection standard.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is Fig. 1 left view;

Fig. 3 is the utility model stereochemical structure exploded view.

Fig. 4 is the rear view of Fig. 3.

Embodiment

As Fig. 1, shown in Figure 3, the pressuring line structure of electric tool switch comprises switch base 12, be flush-mounted in two winding terminals 5 of switch base both sides and the static contact 2 of the band fixed contact 1 that links to each other with every winding terminal 5 and drive the movable contact spring 8 of contact 10, this movable contact spring is hinged on the conducting bracket 9, and the rear side of described conducting bracket 9 turns down backward and forms kink 13.On binding post 5, offer the plug wire hole 4 of horizontal direction and the screw hole 6 of vertical direction.The rear end kink 13 of described static contact 2 and conducting bracket 9 passes the plug wire hole 4 on the corresponding binding post 5 respectively, and makes moving contact 10 fixed contacts 1 relative.The plug wire hole 4 of binding post 5 is the plane over against static contact 2 and conducting bracket 9 one sides, to increase contact area, makes contact tightr.As Fig. 2, shown in Figure 4, lead is interspersed in respectively in binding post 5 plug wire holes 4, be positioned at the below of static contact 2 and conducting bracket kink 13, line ball screw 7 in the screw hole 6 compresses the kink 13 of lead with static contact 2, conducting bracket, and the kink 13 and plug wire hole 4 wall pressures of static contact 2, conducting bracket are tight.The back side of the static contact 2 in the described plug wire hole 4 and the back side of conducting bracket 9 and lead pressure place mutually are evenly equipped with the strip groove 3,11 vertical with plug wire hole 4, and this strip groove 3,11 can prevent that lead from skidding off plug wire hole 4.

Because static contact 2 or moving support 9 directly link to each other in lead and the plug wire hole, reduce contact and also reduced contact resistance simultaneously, do not have the requirement of the electric conductivity of pairs of posts 5 simultaneously, so this binding post 5 can adopt the low materials of lead tolerance such as aluminium, iron, meet environmental protection standard.

Claims

1. the pressuring line structure of an electric tool switch, the two winding terminals (5) that it comprises switch base (12) and is flush-mounted in the switch base both sides, the static contact (2) of every group of band fixed contact (1) links to each other with corresponding binding post (5) with the movable contact spring (8) of drive contact (10) on being hinged on conducting bracket (9), offer the plug wire hole (4) of level and vertical screw hole (6) on the described binding post (5), the rear end kink (13) that it is characterized in that described static contact (2) and conducting bracket passes the plug wire hole (4) on the corresponding binding post (5) respectively.

2. the pressuring line structure of a kind of electric tool switch according to claim 1, it is characterized in that lead is interspersed in respectively in the binding post plug wire hole (4), be positioned at the below of static contact (2) and conducting bracket kink (13), line ball screw (7) in the screw hole (6) compresses the kink (13) of lead with static contact (2), conducting bracket, and the kink (13) and plug wire hole (4) wall pressure of static contact (2), conducting bracket is tight.

3. the pressuring line structure of a kind of electric tool switch according to claim 2, the plug wire hole (4) that it is characterized in that described binding post (5) is the plane with the contact-making surface of static contact (2), conducting bracket kink (13).

4. the pressuring line structure of a kind of electric tool switch according to claim 3 is characterized in that the back side of the static contact (2) in the described plug wire hole (4) and the back side of conducting bracket (9) are evenly equipped with the strip groove (3,11) vertical with plug wire hole (4).

5. according to the pressuring line structure of claim 1 or 2 or 3 or 4 described a kind of electric tool switchs, it is characterized in that described binding post (5) adopts aluminium or iron to make.