CN2035917U

CN2035917U - Dc relay

Info

Publication number: CN2035917U
Application number: CN 88208423
Authority: CN
Inventors: 陈应生
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-07-12
Filing date: 1988-07-12
Publication date: 1989-04-12

Abstract

The utility model relates to a DC relay, used for communications equipment, electromechanical devices and automatic controls. Power supply can not be interrupted in use by the DC relay used at present. Thus, definite electric energy is needed to be consumed. One permanent magnet is added on an armature by the utility model. An iron core is attracted by the permanent magnet in used by the relay to keep an open spring contact switch on. The power is needed to be supplied only at the moment of starting and stopping. The power is not needed to be supplied in the whole work process. Thus, the utility model is the DC relay with the advantages of energy saving and long service life.

Description

DC relay

The utility model is a kind of direct current relay, is used for communication equipment, electromechanical equipment, control automatically.

The direct current relay that uses mainly is made up of electromagnetic block, Title iron, spring contact at present, by producing magnetic field for the energising of electromagnet winding, thereby inhale moving Title iron, realize switch motion by the movable contact reed in the Title sheet iron strip movable contact spring contact group, power supply can not interrupt when its shortcoming was 1. relay work, therefore consumed power owing to use direct current, therefore makes the dc suppling equipment cost increase in a fairly large number of equipment of relay; 2. because of giving the energising of relay winding for a long time, thus perishable lead, the life-span of shortening relay winding.

The purpose of this utility model is, a kind of improved direct current relay is provided, and makes its moment that only changes in working order need consumed power, and do not need the direct current relay of the long service life of promptly economizing on electricity of consumed power at its steady-working state.

The technical scheme that realizes the purpose of this utility model is: increase by a permanent magnet on Title iron, during the relay starting, the magnetic field that is produced by electromagnet makes the permanent magnet on the iron core adhesive Title iron, thereby drive the spring contact action, cut off the electricity supply with external circuit control this moment, comes pull-core to make by the permanent magnet on the Title iron and often open spring contact maintenance connection; When quitting work, rightabout magnetic force when producing with starting with external circuit control electromagnet, and iron core and permanent magnet are disconnected.

Fig. 1 is a structural representation of the present utility model; Fig. 2 is the schematic diagram of second kind of structure; Fig. 3 is the control circuit figure of relay.1,2 is static contact spring piece among the figure, and 3 is movable contact spring, and 4 is insulating trip, 5,16 is that screw, 6 is iron, 7 is push card, and 8 is Title iron, and 9 is fixed iron piece or iron core, 10 is electromagnet winding lead-out wire, 11,17 is the electromagnet winding, and 12 is the winding skeleton, and 13 is iron core, 14 are fixing card, and 15 is permanent magnet.

Describe the operation principle of structure of the present utility model and relay in detail below in conjunction with accompanying drawing.

Electromagnet portion of the present utility model is made up of yoke 6, electromagnet winding 11, winding skeleton 12, iron core 13, electromagnet winding lead-out wire 10, and its structure is identical with original direct current relay.

Static

contact spring piece

1,2 and the non-contact end of movable contact spring 3 with insulating trip 4 at interval, be fixed on the yoke 6 with screw 5, movable contact spring 3 is than static

contact spring piece

1,2 is long, the other end of movable contact spring 3 is contained on the push card 7, as Fig. 1, shown in 2, an end of promoting card 7 usefulness screws 16 and Title iron 8 is fixed together, be fixed with permanent magnet 15 with fixing card 14 on the other end of Title iron 8, one side of permanent magnet 15 and an end of electromagnet core 13 have certain intervals, the back side of permanent magnet 15 and fixed iron piece 9 adhesives, fixed iron piece 9 can be made an integral body with yoke 6, and yoke 6 becomes the Jiong shape together with fixed iron piece 9, iron core 13, permanent magnet 15, fixed iron piece 9 is with in one plane.

Direct current relay structure shown in Figure 2 and direct current relay structure shown in Figure 1 are basic identical, different is that fixed iron piece 9 is the iron core of electromagnet, one side of permanent magnet 15 and iron core 9 adhesives,

iron core

9 and 13, permanent magnet 15 are with in one plane, two electromagnet windings 11 and 17 wiring can be adopted serial or parallel connection in this structure, but will guarantee when winding is switched on

iron core

9 and 13 identical facing to the magnetic polarity of permanent magnet 15 sides.

The operation principle of relay:

When relay shown in Figure 1 is not worked, permanent magnet 15 is in and fixed iron piece 9 attracting states, movable contact spring 3 in the spring contact group is connected with static contact spring piece 1, disconnect with static contact spring piece 2, when electromagnet winding 11, energized, the sense of current is correct, be the polarity of magnetic polarity and permanent magnet 15 of electromagnet core 13 when opposite, produce the power of inhaling mutually between them, the relay of Fig. 2 structure is not when working, permanent magnet 15 keeps the attracting state with iron core 9, in the moment of energized, produce the power repel each other between permanent magnet 15 and the iron core 9, and produce the power of inhaling mutually between the iron core 13, the motion of permanent magnet 15 drives Title iron 8 motion together, move together thereby promote push card and movable contact spring 3, make, static

contact spring piece

3,1 contact disconnects, and is moving, static

contact spring piece

3,2 contacts are connected, can be controlled the power supply of tripping magnet winding this moment by external circuit, utilize the magnetic attracting iron core 13 of permanent magnet 15, keep the connection of normal opened contact, the disconnection of normally closed contact.

When relay is quit work, the transient current of current opposite in direction makes to produce the opposite magnetic field of magnetic force when passing to direction with starting for the electromagnet winding again, thereby permanent magnet 15 and iron core 13 are disconnected, with fixed iron piece or iron core 9 adhesives, this process can be controlled by external circuit.

Fig. 3 is the control circuit figure of relay, and its principle is, as K switch and K ₂During connection, relay J is the state of quitting work, as K switch and K ₂Disconnect, when connecting with K, DC power supply is given capacitor C through relay J ₂Charging, capacitor C ₁By J discharge, for relay J provides electric current by "+" to "-" direction, this moment permanent magnet 15 with iron core 13 adhesives, normal opened contact is connected, normally closed contact disconnects, owing to be DC power supply, so by relay J and capacitor C ₂The loop of forming, very fast deenergization, the magnetic attracting iron core 13 by permanent magnet 15 makes relay in running order; As K switch and K ₁Disconnect, with K ₂During connection, power supply is given capacitor C through relay J ₁Charging, capacitor C ₂By relay J discharge, serve as reasons "-" to "+" at the relay J two ends sense of current this moment, so the magnetic field of anti-magnetic mutually when making electromagnet produce with its starting makes permanent magnet 15 and iron core 13 disconnections, owing to capacitor C in the circuit ₁Effect, very fast deenergization, the relay recovery state that quits work.

Because the utility model has adopted permanent magnet as the state that keeps normal opened contact to connect when relay is worked, so except when relay starts and quits work, need powering, in the whole course of work, need not power supply, therefore have long advantage of economize on electricity and life-span, also saved simultaneously the cost of dc suppling equipment.

Claims

1, a kind of direct current relay, by yoke 6, electromagnet winding 11,17, winding skeleton 12, iron core 13, armature 8, dynamic and static reed 3 and 1,2 is formed.The tache motorice that it is characterized in that movable contact spring 3 is contained on the push card 7, one end of armature 8 is fixed on the push card 7, the other end is fixed with permanent magnet 15, and a side of permanent magnet 15 and an end of electromagnetic core 13 have certain intervals, its back side and fixed iron piece or iron core 9 adhesives.

2, direct current relay as claimed in claim 1 is characterized in that said fixed iron piece 9 can make an integral body with yoke 6.

3, direct current relay as claimed in claim 1 is characterized in that said fixed iron piece 9 can be the iron core of electromagnet.