CN205248129U - Limit switch - Google Patents

Abstract

The utility model discloses a limit switch, including the base, base one side is fixed with positive electrode and negative electrode, and the positive electrode is continuous with a contact on the base, the metal coil and the contact arm of negative electrode connection base opposite side, no. Two contacts are connected to metal coil top and contact arm below, no. One the contact outside is fixed with the insulating arch of round. The utility model discloses compare with the conventional art, through setting up the arch in a contact outside, prevent that the contact from taking place the skew to keeping away from the base direction under touching with no. Two contact strikings many times to the life of whole switch has been improved.

Description

A kind of limit switch

Technical field

The utility model belongs to mechanical field, is specifically related to a kind of limit switch.

Background technology

Limit switch can be arranged on relatively static object (as fixed mount, doorframe etc., be called for short still life) upper orOn the object (as driving, door etc., being called for short animal) of person's motion. The contact lever of switch does displacement and carrys out driving switchTwo contacts in conjunction with or separate, form circuit pathways or open circuit. And because two contacts need often dynamically to intersect,Time one length can cause the contact skew distortion of a side, two contacts in the time that another contact moves to this contact againDo not have intersection point therefore cannot form path, affect service life.

Summary of the invention

Goal of the invention: the purpose of this utility model is for the deficiencies in the prior art, and is provided a kind of service lifeLong limit switch.

Technical scheme: in order to achieve the above object, be originally that utility model specifically completes like this: a kind of limitBit switch, comprises base, and base one side is fixed with positive electrode and negative electrode, touches for No. one on positive electrode and baseSheet is connected, and negative electrode connects wire coil and the contact lever of base opposite side, described wire coil top and contactBar below connects No. two contacts, and described contact outside is fixed with a circle insulation projection.

Preferably, described insulation projection is rubber or duroplasts.

Beneficial effect: the utility model is compared with conventional art, by a contact arranged outside projection, anti-Only contact repeatedly with No. two contacts clash into touch under to being offset away from base direction, thereby improvedThe service life of whole switch.

Brief description of the drawings

Fig. 1 is the utility model structural representation.

Detailed description of the invention

Embodiment 1:

As shown in Figure 1, a kind of limit switch that the utility model provides, comprises base 1, and base 1 one sides are solidSurely have positive electrode 2 and negative electrode 3, positive electrode 2 is connected with a contact 4 on base, and negative electrode 3 connectsThe wire coil 5 of base 1 opposite side and contact lever 6, described wire coil 5 tops and contact lever 6 belows connectConnect contact 7 No. two, described contact 4 outsides are fixed with a circle insulation projection 8; Described insulation projection 8 isRubber or duroplasts.

Claims (2)

1. a limit switch, comprises base (1), and base (1) one side is fixed with positive electrode (2) and negativeElectrode (3), positive electrode (2) is connected with the contact (4) on base, and negative electrode (2) connects base(1) wire coil of opposite side (5) and contact lever (6), described wire coil (5) top and contact lever(6) below connects No. two contacts (7), it is characterized in that, a described contact (4) outside is fixed with a circleInsulation projection (8).

2. limit switch according to claim 1, is characterized in that, described insulation projection (8) is rubberGlue or duroplasts.