CN201857822U

CN201857822U - Novel electromagnetic lock

Info

Publication number: CN201857822U
Application number: CN2010202317206U
Authority: CN
Inventors: 郑志贤; 管声军
Original assignee: FOSHAN CITY SHUNDE DISTRICT SHUNJIALI ELECTRICAL APPLIANCES Co Ltd
Current assignee: FOSHAN CITY SHUNDE DISTRICT SHUNJIALI ELECTRICAL APPLIANCES Co Ltd
Priority date: 2010-06-18
Filing date: 2010-06-18
Publication date: 2011-06-08
Anticipated expiration: 2020-06-18

Abstract

The utility model provides a novel electromagnetic lock, which comprises an outer frame, an electromagnetic coil, a spring, a magnetic-conductive plate, a fixed iron core, a movable iron core, a guide rod, a space washer and a rectification circuit, wherein a non-magnetic washer is arranged between the fixed iron core and the movable iron core. Since the non-magnetic washer is arranged between the fixed iron core and the movable iron core, when the lock is closed, the movable iron core is not in direct contact with the fixed iron core, the probability of magnetizing the movable iron core and the fixed iron core is reduced, and when the movable iron core and the fixed iron core are magnetized, since the non-magnetic washer is arranged between the fixed iron core and the movable iron core, the fixed iron core can be normally separated from the movable iron core, and the normal work of the electromagnetic lock is further ensured.

Description

A kind of electromagnetic lock

Technical field

The utility model relates to a kind of electromagnetic switch or valve, refers in particular to a kind of electromagnetic lock.

Background technology

The design of electromagnetic lock is the same with electromagnet, is the principle of utilizing electric magnetisation, when electric current flows through, electromagnetic lock will produce strong suction, thereby can absorption iron plate tightly reach the effect of locking a door, as long as very little electric current, electromagnetic lock just can produce greatest magnetic force.Existing electromagnetic lock generally comprises housing, described housing is the body structure that two opposite ends are equipped with opening, wherein A ' openend is bigger than other diameter of B ' openend, described housing is formed with accommodates cavity, electromagnetic coil, described electromagnetic coil is wrapped on the plastic processing frame by enamel-covered wire and constitutes, the center of plastic processing frame is the hollow cylinder shape structure, and the diameter of centered cylinder is identical with the diameter of B ' opening, magnetic conductive board, magnetic conductive board is riveted near on the housing of A ' openend, and described electromagnetic coil is contained in accommodating in the cavity of housing, and the B ' openend of an end and housing joins, the other end and magnetic conductive board join, and pass magnetic conductive board; Contain interactive fixed core and moving iron core in the hollow circuit cylinder of electromagnetic coil, wherein fixed core wears described B ' opening near described B ' opening and fixed core, the central authorities of described fixed core are equipped with guide peg and can join with moving iron core, guide peg can with moving iron core by being threaded or riveted is connected, the end of described guide peg is provided with plastics space washer or stainless steel nut, the circuit board of the external rectification circuit of described electromagnetic coil; Described moving iron core is provided with a back-up ring at the other end away from fixed core, and back-up ring is corresponding with magnetic conductive board respectively, and all is fixed with spring between back-up ring and the magnetic conductive board.

When electromagnetic lock is worked, moving iron core is subjected to magneticaction, drive guide peg, space washer, back-up ring, spring is together towards fixed core motion, and the final and fixed core of moving iron core is combined closely, thereby reaches the purpose of guide peg and external piece locking, and under long-term or long-time situation about using, moving iron core and the phenomenon that fixed core is magnetized then occur easily, make the product cisco unity malfunction, such as the moving iron core after the magnetization and fixed core with regard to as the south poles of two blocks of magnet is docked, the structure that script has just been combined closely, add the magnetic force that attracts each other, make electromagnetic lock be difficult to reset and open, thereby influence operate as normal.

In addition electromagnetic lock is in that to open external power supply sealed or close external power supply when unclamping moment, the electromagnetic coil group is easy to generate reverse high voltage of moment, thereby cause the rectifying component on the circuit board to be pressed the phenomenon that enamel-covered wire is struck off in puncture or the electromagnetic coil easily, thereby make can not normally using of product by high voltage.

The utility model content

The utility model provides the electromagnetic lock of a kind of antimagnetizing and long service life.

A kind of electromagnetic lock that the utility model provides comprises housing, electromagnetic coil, spring; Magnetic conductive board, fixed core, moving iron core, guide peg, space washer and rectification circuit are provided with residual shim between described fixed core and the described moving iron core.Owing between fixed core and moving iron core, residual shim is set, when locking, moving iron core can directly contact with fixed core, therefore can reduce the probability that both are magnetized, and when both are magnetized, can also be situated between because of the residual shim setting, thereby both can be separated normally, guarantee the operate as normal of electromagnetic lock.

A kind of electromagnetic lock that the utility model provides, described electromagnetic coil reaches to hold therewith on the relative other end with an end of described magnetic conductive board contact and is equipped with insulating trip, add insulating trip by two ends at electromagnetic coil, thereby can better isolate electromagnetic coil and housing, increase the distance between interior enamel-covered wire of electromagnetic coil and the housing; Because distance is far away more, the possibility of electric leakage is just more little, therefore can better prevent to be broken down by high-voltage between electromagnetic lock electromagnetic coil and the shell.In addition, whether two ends are all set between insulating trip and the shell, can also decide on demand, and being provided with can flexible Application increase a slice or two.

A kind of electromagnetic lock that the utility model provides, oppositely commutation diode in parallel between described rectification circuit and the described electromagnetic coil, by and connect a reverse commutation diode, thereby in the time of can absorbing electromagnetic coil and power because of start and stop moment reverse impact, therefore can avoid interior enamel-covered wire of electromagnetic coil or rectification circuit components and parts to be reversed electricity and thrust, can prolong the application life of electromagnetic lock.

A kind of electromagnetic lock that the utility model provides, described residual shim are located on the described fixed core, and residual shim is arranged on the fixed core and can decides on demand, and being provided with can flexible Application.A kind of electromagnetic lock that same the utility model provides, described residual shim are located on the described moving iron core, also decide on demand, and flexible Application is set.

Description of drawings

Generalized section when accompanying drawing 1 is locked for the utility model electromagnetic lock is disconnected;

Generalized section when accompanying drawing 2 is the locking of the utility model electromagnetic lock;

Accompanying drawing 3 is the schematic diagram of the coil external circuits of the utility model electromagnetic lock.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described further.

Generalized section when seeing also accompanying drawing 1 for the disconnected lock of the utility model electromagnetic lock.As shown in Figure 1, preferably, electromagnetic lock generally comprises housing 1, described housing 1 is the body structure that two opposite ends are equipped with opening, and wherein the diameter of A openend is bigger than the diameter of another B openend, described housing 1 is formed with accommodates cavity 15, and housing 1 is made by metal material; Electromagnetic coil 2, described electromagnetic coil 2 are wrapped on the plastic processing frame by enamel-covered wire and constitute, and the center of plastic processing frame is the hollow cylinder shape structure, and the diameter of centered cylinder is identical with the diameter of B opening; Magnetic conductive board 4, magnetic conductive board 4 are riveted near on the housing 1 of A openend, and described electromagnetic coil 2 is contained in accommodating in the cavity 15 of housing 1, and the B openend of an end and housing joins, and the other end and magnetic conductive board 4 join, and pass magnetic conductive board 4; Contain interactive fixed core 2 and moving iron core 6 in the hollow circuit cylinder of electromagnetic coil 2, wherein fixed core 5 wears described B opening near described B opening and fixed core 5, the central authorities of described fixed core 5 be equipped with guide peg 7 can with moving iron core 6 join guide peg 7 can with moving iron core 6 by being threaded or riveted is connected, the end of described guide peg 7 is provided with space washer 8, described space washer 8 can be made of plastic, perhaps substitutes with the stainless steel nut; The circuit board of described electromagnetic coil 2 external rectification circuits 9; Described moving iron core 6 is provided with a back-up ring 13 at the other end away from fixed core 5, back-up ring 13 is corresponding with magnetic conductive board 5 respectively, and all be fixed with spring 3 between back-up ring 13 and the magnetic conductive board 8, its guide ring 13 belows also can be fixed with spring shim 14, if the spring 3 that uses then can use spring shim 14 that spring 3 is fixed on the back-up ring 13, if other structures as the structure of circular ring type, then can not use spring shim 14, decide on demand.

Preferably, be provided with residual shim 10 between the fixed core 5 of the utility model electromagnetic lock and the moving iron core 6, because fixed core 5 and moving iron core 6 are after the electromagnetic lock closure, fixed core 8 contacts for face with moving iron core 6, therefore residual shim 10 is arranged between two contact surfaces of fixed core 2 and moving iron core 6, and residual shim 10 both can be fixed on the contact surface of moving iron core 6, can be fixed on the contact surface of fixed core 5 again, concrete setting can be decided flexible Application according to demand.Residual shim 10 can select for use various material to make, and all can as nonmagnetic substances such as plastics, aluminium, copper.

Preferably, the electromagnetic coil 2 of the utility model electromagnetic lock reaches to hold therewith with an end of described magnetic conductive board 4 contacts and is equipped with insulating trip 11 on the relative other end, i.e. the contacted end of the B openend of housing.Insulating trip 11 is made by nonmetals, can better isolate electromagnetic coil 2 and metal outer frame 1, increases the distance between the enamel-covered wire and metal outer frame 1 in the electromagnetic coil 2, thereby can prevent better that product is broken down by high-voltage.

Preferably, see also accompanying drawing 3, the utility model electromagnetic lock is owing to use the operating current that is to be required to be direct current, therefore when the electric current of connecting is alternating current, also need alternating voltage to be changed by an external rectification circuit 9, this rectification circuit is located on circuit board (identifying among the figure), constitutes commutating circuit by series connection or a plurality of electronic component in parallel (identifying among the figure) and constitute.In the utility model electromagnetic lock; in order to prevent that the moment backward current from thrusting electronic component on electromagnetic coil 2 and the circuit board (among the figure sign) (among the figure sign); therefore also can reverse commutation diode 12 in parallel between rectification circuit 9 and electromagnetic coil 2; thereby reach the purpose that absorbs electromagnetic coil 2 reverse impact electric currents, thereby protection electromagnetic lock.Certainly, when external circuitry is direct current, then do not need to add rectification circuit, can reach same protection purpose this moment by at the two ends of electromagnetic coil 2 and connect a reverse commutation diode 12.

Preferably, as shown in Figure 2, the residual shim 10 of the utility model electromagnetic lock is fixed on the contact surface of moving iron core 5, in use, moving iron core 5 will drive guide peg 7, space washer 8, spring 3, residual shim 10, back-up ring 13 together move, till complete tight contact of the contact surface of residual shim 10 and fixed core 6.Owing to added residual shim 10, therefore can reduce the probability that fixed core 6 and moving iron core 5 are magnetized, if and moving iron core 5 magnetizes with fixed core 6, owing to press from both sides the residual shim of establishing 10 between the two, reduced magnetic force between the two, just added a residual shim, can reduce suction between the two as south poles joint at electromagnet, thereby can guarantee that moving iron core and fixed core can disconnect smoothly, guarantee the operate as normal of electromagnetic lock.

Simultaneously insulating trip is set, can better isolates electromagnetic coil and metal outer frame at the two ends of coil, the distance in the increase electromagnetic coil between enamel-covered wire line and the metal outer frame, thus can prevent better that electromagnetic lock is broken down by high-voltage.And the backward dioded of setting up, therefore the high pressure reverse impact electricity that coil moment produces in the time of can absorbing electromagnetic lock and start or stop can prevent the damage of electromagnetic coil or electronic component (among the figure sign), has effectively guaranteed the life-span of electromagnetic lock.

Embodiment only is a preferred optimum implementation of the present invention in sum; unintelligible is that protection scope of the present invention is limited; technical work personnel for this area originally are adjustment that does not exceed technical solution of the present invention and the change that strength is done according to the present invention, should think and drop in protection scope of the present invention.

Claims

1. an electromagnetic lock comprises housing, the electromagnetic coil group, and spring, magnetic conductive board, fixed core, moving iron core, guide peg, space washer and rectification circuit is characterized in that: be provided with residual shim between described fixed core and the described moving iron core.

2. a kind of electromagnetic lock as claimed in claim 1 is characterized in that: described residual shim is located on the described fixed core.

3. a kind of electromagnetic lock as claimed in claim 1 is characterized in that: described residual shim is located on the described moving iron core.

4. a kind of electromagnetic lock as claimed in claim 1 is characterized in that: described electromagnetic coil reaches to hold therewith on the relative other end at the end with described magnetic conductive board contact and is equipped with insulating trip.

5. as claim 1 described a kind of electromagnetic lock, it is characterized in that: oppositely commutation diode in parallel between described rectification circuit and the described electromagnetic coil.

6. a kind of electromagnetic lock as claimed in claim 1 is characterized in that: described residual shim is become by plastics or aluminium or copper by described residual shim.