CN202084481U

CN202084481U - Normally-closed relay

Info

Publication number: CN202084481U
Application number: CN2011201899100U
Authority: CN
Inventors: 邓真玉; 陈海多; 黄晓湖; 刘小龙; 邹达仁; 方旭; 屠西奎; 刘勇; 卿新华
Original assignee: YUEQING MEISHUO ELECTRIC Co Ltd
Current assignee: YUEQING MEISHUO ELECTRIC Co Ltd
Priority date: 2011-06-08
Filing date: 2011-06-08
Publication date: 2011-12-21
Anticipated expiration: 2021-06-08

Abstract

The utility model discloses a normally-closes relay, which comprises a pedestal, a contact reed, an armature and an iron core, wherein an end face at one end of the armature and the contact reed are fixed together, an end face at the other end of the armature and the end face of the iron core can be attracted together under the attraction of an electromagnetic force, and a protrusion is arranged at a corresponding position on the end face where the armature and the iron core can be attracted together, thus when the normally-closes relay operates, the protrusion on the armature and the end face of the iron core are attracted together, and the armature is in single-side inclination, with the protrusion on the armature being a center, so that a counter force when the armature and the iron core are separated is increased, and higher release voltage is generated in cutting off. Compared with the prior art, the normally-closed relay can achieve the purpose of releasing higher voltage in cutting off without adding a normally-open positioning sheet, effectively simplifies an overall structure, reduces employed components and parts, and reduces production cost.

Description

A kind of normally closed relay

Technical field

The utility model relates to a kind of normally closed relay.

Background technology

Relay generally is made up of iron core, coil, armature, contact reed etc.As long as add certain voltage at the coil two ends, will flow through certain electric current in the coil, thereby generation galvanomagnetic effect, armature will overcome the pulling force of return spring under the effect of electromagnetic attracting force inhales to iron core, thereby drives the moving contact and fixed contact (normally opened contact) adhesive of armature.Behind coil blackout, the suction of electromagnetism also disappears thereupon, and armature will return original position under the reaction force of spring, makes moving contact and original fixed contact (normally-closed contact) release.Adhesive like this, release, thus reached the conducting in circuit, the purpose of cut-out.And existing normally closed relay produces higher release voltage in order to make armature and iron core when separating, usually need set up and often open spacer and guarantee that it can discharge higher voltage, but such structure setting causes the part portion in the normally closed relay too much, structure complicated, production cost improves.

Summary of the invention

At the deficiencies in the prior art, the utility model provides a kind of designs simplification, used parts are less, production cost is lower normally closed relay.

For achieving the above object, the utility model provides a kind of normally closed relay, comprise contact reed, armature and iron core, the one end end face and the contact reed of described armature fix, the other end end face of described armature can be under the attraction of electromagnetic force and the adhesive mutually of iron core end face, and described armature can be provided with projection in the end face relevant position of adhesive mutually with iron core.

The utility model can further be set to armature and iron core mutually after the adhesive, and the end face that the projection on the described armature is arranged in iron core in the heart.

The utility model also can further be set to also comprise pedestal, and described iron core is installed in the pedestal.

The beneficial effects of the utility model are: adopt said structure, owing to can on the end face relevant position of adhesive projection be set mutually with iron core at described armature, therefore after the normally closed relay action, the end face center adhesive mutually of the projection on the armature and iron core, armature is the monolateral inclination in center with the projection on the armature, counter-force when increase armature separates with iron core, thereby when cutting off, produce higher release voltage, the utility model compared with prior art, need not to set up and often open spacer, just can reach the purpose that when cutting off, discharges high voltage, simplified the overall structure of normally closed relay effectively, and used parts are reduced, production cost is reduced.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural perspective of armature in the utility model.

Embodiment

Provided a kind of normally closed relay as shown in Figure 1, 2, comprise pedestal 1, contact reed 2, armature 3 and iron core 4, described iron core 4 is installed in the pedestal 1, the one end end face and the contact reed 2 of described armature 3 fix, the other end end face of described armature 3 can be under the attraction of electromagnetic force and the adhesive mutually of iron core 4 end faces, described armature 3 can be provided with projection 31 in the end face relevant position of adhesive mutually with iron core 4, and described armature 3 and iron core 4 be mutually after the adhesive, and the end face that the projection 31 on the described armature 3 is arranged in iron core 4 in the heart.

Adopt said structure, owing to can on the end face relevant position of adhesive projection 31 be set mutually with iron core 4 at described armature 3, therefore after the normally closed relay action, the end face center adhesive mutually of the projection 31 on the armature 3 and iron core 4, armature 3 is the monolateral inclination in center with the projection on the armature 3 31, counter-force when increase armature 3 separates with iron core 4, thereby when cutting off, produce higher release voltage, the utility model compared with prior art, need not to set up and often open spacer, just can reach the purpose that when cutting off, discharges high voltage, simplified the overall structure of normally closed relay effectively, and used parts are reduced, production cost is reduced.

Claims

1. normally closed relay, comprise contact reed, armature and iron core, the one end end face and the contact reed of described armature fix, the other end end face of described armature can be under the attraction of electromagnetic force and the adhesive mutually of iron core end face, and it is characterized in that: described armature can be provided with projection in the end face relevant position of adhesive mutually with iron core.

2. a kind of normally closed relay according to claim 1 is characterized in that: armature and iron core be mutually after the adhesive, and the end face that the projection on the described armature is arranged in iron core in the heart.

3. a kind of normally closed relay according to claim 1 and 2 is characterized in that: also comprise pedestal, described iron core is installed in the pedestal.