CN2819450Y

CN2819450Y - Magnetic path of electromagnetic relay

Info

Publication number: CN2819450Y
Application number: CN 200520084294
Authority: CN
Inventors: 王俊青
Original assignee: Xiamen Hongfa Electroacoustic Co Ltd
Current assignee: Xiamen Hongfa Electroacoustic Co Ltd
Priority date: 2005-06-14
Filing date: 2005-06-14
Publication date: 2006-09-20
Anticipated expiration: 2015-06-14

Abstract

The utility model discloses a magnetic path of an electromagnetic relay which comprises a 'C'-shaped component composed of a stationary conductive magnet and magnetic steel, a coil and a movable conductive magnet. The magnetic path not only can enlarge coiling space, but also can reduce the occupation of internal space of a relay; the manufacturing technique is simplified; requirements to parts and assembling precision are reduced; the connection of a movable component and a stationary component of the utility model uses a non-metallic connecting type, and the generation of powder is reduced. Accordingly, the utility model makes the relay have compacter structure, smaller size, higher sensitivity and higher working reliability.

Description

A kind of magnetic circuit of electromagnetic relay

Technical field

The utility model relates to a kind of electromagnetic relay, especially relates to a kind of magnetic circuit and method of work thereof of electromagnetic relay.

Background technology

Electromagnetic relay is widely used in the automatic control equipment, because the needs of development in science and technology require relay construction compacter, volume is littler, and sensitivity is higher, and functional reliability is higher, and energy consumption is lower.For reaching above-mentioned requirements, such relay magnetic structures that magnet steel is arranged that adopt more, to reduce volume and energy consumption, improve sensitivity and reliability, known magnetic structure has following several: disclose a kind of " E " shape magnetic structure with magnet steel in CN02134301.2 number patent of invention and the JP09-139166 patent of invention, it is that metal friction easily produces powder that this magnetic structure complexity, magnet steel and/or supporting magnetic conductor have occupied certain winding space, armature and supporting magnetic conductor; The US4695813 patent of invention discloses a kind of " mouth " magnetic circuit, this magnetic structure complexity, and the element precision of requirement and assembly precision height thereof, and magnet steel occupied certain winding space, armature and magnet steel are metals and the contacting of metal, easily friction produces powder; The US6670871 patent of invention discloses the movable magnetic circuit of a kind of magnet steel, and the moving part quality of this magnetic structure is big, and inertia is big, the anti shock and vibration poor-performing, and functional reliability is not high, and magnet steel has also occupied the inner certain space of relay.

The utility model content

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of magnetic circuit and method of work thereof of electromagnetic relay are provided, this magnetic circuit has enlarged winding space, reduce the inner space that takies relay, reduced the quality of movable member, reduced required precision to part and assembling, the nonmetallic way of contact has been adopted in contacting of its movable member and stationary parts, reduced the generation of powder, thereby the simplification production technology makes relay construction compacter, and volume is littler, sensitivity is higher, and functional reliability is higher.

For achieving the above object, the magnetic circuit of a kind of electromagnetic relay of the present utility model, comprise static magnetic conductor 11c, magnet steel 11d, coil 13 and movable magnetic conductor 31, magnet steel 11d is arranged on the two ends of described static magnetic conductor 11c, both form one " C " shape parts 11, and the magnet steel at C shape two ends is a magnetic pole, constitutes two magnetic loops independently with another magnetic pole of C shape substantial middle.

Described coil 13 is wound on described " C " shape parts 11, and insulating material is arranged between them, and described insulating material can be injection-moulded in " C " shape parts 11, also can be to wrap up or be coated on " C " shape parts 11.

The supporting member 22 that the movable magnetic conductor of described supporting rotates is nonmetallic materials.

Described magnetic circuit can be the two ends that the magnet steel 11d that described size is identical is placed on described static magnetic conductor 11c, and the magnetic field intensity of two magnet steel 11d is even.

The method of work of described magnetic circuit is: two magnet steel 11d big or small identical and magnetic field intensity is even, two uniform

magnetic loops

51,52 of magnetic field intensity in the magnetic circuit have been formed, do not giving under the situation of coil power supply, there are two stable states in described magnetic circuit, reset and SM set mode, establish accompanying drawing and be depicted as reset mode; Under the reset mode, because the pole-face 11b of the pole-face 31b of movable magnetic conductor 31 and magnet steel 11d applying, and another has air gap to pole-face, so the magnetic force of magnetic loop 52 greater than the magnetic force of magnetic loop 51, makes relay remain on reset mode; At reset mode, when instantaneous set driving voltage being provided for described coil 13, the magnetic field of the magnetic field opposing magnetic loop 52 that described coil 13 produces, and the magnetic field that strengthens magnetic loop 51, make the pole-face 31b of described movable magnetic conductor 31 and the pole-face 11b of described magnet steel 11d break away from, and the pole-face 11a of the pole-face 31a of movable magnetic conductor 31 and magnet steel 11d fit, and removes the driving voltage of coil 13 afterwards, the magnetic force of magnetic loop 51 is greater than the magnetic force of magnetic loop 52, and magnetic circuit remains on SM set mode; In SM set mode, when instantaneous resetting voltage being provided for described coil 13, magnetic circuit is returned to reset mode again; And so forth, the contact component that drives relay cut-offs.

Described magnetic circuit also can be that a pole-face of the described movable magnetic conductor 31 in above-mentioned magnetic circuit is provided with an antifreeze plate 34, or with magnetic field intensity is even but the described magnet steel 11d that causes not of uniform size is placed on the both sides of described static magnetic conductor 11c, or with magnetic field intensity is inhomogeneous but two described magnet steel 11d of the same size are placed on the both sides of described static magnetic conductor 11c, make the magnetic field intensity of magnetic circuit inhomogeneous.The method of work of described magnetic circuit is, because the magnetic field intensity of two

magnetic loops

51,52 is inhomogeneous in the magnetic circuit, under the condition of not giving described coil 13 power supplies, only there is a stable state in magnetic circuit, and promptly release condition are established accompanying drawing and are depicted as release condition; Under the release condition, because the magnetic force of magnetic loop 52 greater than the magnetic force of magnetic loop 51, makes the pole-face 31b of described movable magnetic conductor 31 and the pole-face 11b of magnet steel 11d fit, and another is thrown off pole-face, and relay remains on release condition; In release condition, when driving voltage being provided for described coil 13, the magnetic field of the magnetic field opposing magnetic loop 52 that described coil 13 produces, and the magnetic field that strengthens magnetic loop 51, make the pole-face 31b of described movable magnetic conductor 31 and the pole-face 11b of described magnet steel 11d break away from, and the pole-face 11a of the pole-face 31a of described movable magnetic conductor 31 and described magnet steel 11d fits, and relay is in operate condition; Behind the driving voltage that removes coil 13, because the magnetic force of magnetic loop 52 is greater than the magnetic force of magnetic loop 51, magnetic circuit is returned to release condition; And so forth, drive cut-offfing of contact component.

The magnetic circuit of electromagnetic relay of the present utility model can be applicable on a kind of electromagnetic relay, described electromagnetic relay, comprise case 4, armature assembly 3, coil component 1 and quiet spring footnote are moulded together pedestal 2, described coil component 1 comprises magnet steel 11d and static magnetic conductor 11c " C " shape parts 11 that constitute and the bobbin 12 that insulate that is injection-moulded in together, be wound with coil 13 on the described bobbin 12, described armature assembly 3 comprises described armature 31 and is arranged at least one movable contact spring 33 of armature 31 sides and they are injection-moulded in together insulating material 32.The magnetic circuit that described magnet steel 11d, static magnetic conductor 11c, coil 13 and armature 31 constitute can form left-right symmetric or asymmetrical magnetic circuit.

Compared with prior art, advantage of the present utility model has been to provide a kind of magnetic circuit and method of work thereof of electromagnetic relay, its stationary part of this magnetic circuit constitutes " C " shape, do not take winding space as " E " shape structure, do not take the inner space of relay yet, and reduced the quality of movable member as the movable structure of magnet steel; Its stationary part is wrapped in insulating material inside, has reduced element precision and assembly precision requirement; Nonmetallic connected mode has been adopted in being connected of its movable member and stationary parts, has reduced the generation of powder, thereby has simplified production technology, make relay construction compacter, volume is littler, and sensitivity is higher, functional reliability is higher, is applicable to large-scale production line operation.

Description of drawings:

Fig. 1 is the front view of an embodiment of the present utility model;

Fig. 2 is the front view of another embodiment of the present utility model;

Fig. 3 is the front view of another embodiment of the present utility model;

Fig. 4 is a cutaway view of using an electromagnetic relay embodiment of the present utility model;

Fig. 5 is a blast axonometric drawing of using an electromagnetic relay embodiment of the present utility model.

Embodiment

Below, embodiment further describes the utility model with reference to accompanying drawing.

Fig. 1 has provided an embodiment of the present utility model, this magnetic circuit comprises static magnetic conductor 11c, magnet steel 11d, coil 13 and movable magnetic conductor 31, described magnet steel 11d is placed on the two ends of described static magnetic conductor 11c, both form one " C " shape parts 11, described coil 13 is wound on described " C " shape parts 11, insulating material is arranged between them, and described insulating material can be injection-moulded in " C " shape parts 11, also can be to wrap up or be coated on " C " shape parts 11.In described magnetic circuit, magnet steel 11d is placed on the two ends of described static magnetic conductor 11c, and size and the magnetic field intensity of magnet steel 11d are even, its method of work is: because the size and the magnetic field intensity of magnet steel are even, formed two uniform

magnetic loops

51,52 of magnetic field intensity in the magnetic circuit, do not given under the condition of coil power supply, there are two stable states in described magnetic circuit, reset and SM set mode, establish accompanying drawing and be depicted as reset mode; Under the reset mode, because the pole-face 11b of the pole-face 31b of movable magnetic conductor 31 and magnet steel 11d applying, and another has air gap to pole-face, so the magnetic force of magnetic loop 52 greater than the magnetic force of magnetic loop 51, makes relay remain on reset mode; At reset mode, when instantaneous set driving voltage being provided for described coil 13, the magnetic field of the magnetic field opposing magnetic loop 52 that described coil 13 produces, and the magnetic field that strengthens magnetic loop 51, make the pole-face 31b of described movable magnetic conductor 31 and the pole-face 11b of described magnet steel 11d break away from, and the pole-face 11a of the pole-face 31a of described movable magnetic conductor 31 and described magnet steel 11d fit, and removes the driving voltage of coil 13 afterwards, the magnetic force of magnetic loop 51 is greater than the magnetic force of magnetic loop 52, and magnetic circuit remains on SM set mode; In SM set mode, when instantaneous resetting voltage being provided for described coil 13, magnetic circuit is returned to reset mode again; And so forth, the contact component that drives relay cut-offs.

Fig. 2 has provided another embodiment of the present utility model, and is in this magnetic circuit that magnetic field intensity is even but the described magnet steel 11d of two of causing not of uniform size is positioned over the two ends of described static magnetic conductor 11c, makes the magnetic field intensity of magnetic circuit inhomogeneous.

Fig. 3 has provided another embodiment of the present utility model, this magnetic circuit comprises static magnetic conductor 11c, magnet steel 11d, coil 13 and movable magnetic conductor 31, described magnet steel 11d is placed on the two ends of described static magnetic conductor 11c, both form one " C " shape parts 11, described coil 13 is wound on the two poles of the earth 11a, the 11b on described " C " shape parts 11, welding one antifreeze plate 34 on a pole-face 31a of described movable magnetic conductor 31 makes the magnetic field intensity of two magnetic loops of magnetic circuit inhomogeneous.

As Fig. 2 or the described magnetic circuit of Fig. 3, its method of work is: because the magnetic field intensity of two

magnetic loops

51,52 is inhomogeneous in the magnetic circuit, do not giving under the condition of coil 13 power supplies, only there is a stable state in described magnetic circuit, be release condition, establish accompanying drawing and be depicted as release condition; Under the release condition, because the magnetic force of magnetic loop 52 greater than the magnetic force of magnetic loop 51, makes the pole-face 31b of movable magnetic conductor 31 and the pole-face 11b of magnet steel 11d fit, and another is thrown off pole-face, and relay remains on release condition; In release condition, when driving voltage being provided for described coil 13, the magnetic field of the magnetic field opposing magnetic loop 52 that described coil 13 produces, and the magnetic field that strengthens magnetic loop 51, make the pole-face 31b of described movable magnetic conductor 31 and the pole-face 11b of described magnet steel 11d break away from, and the pole-face 11a of the pole-face 31a of described movable magnetic conductor 31 and described magnet steel 11d fits, and relay is in operate condition; Behind the driving voltage that removes coil 13, because the magnetic force of magnetic loop 52 is greater than the magnetic force of magnetic loop 51, magnetic circuit is returned to release condition; And so forth, the contact component that drives relay cut-offs.

Fig. 4, Fig. 5 have provided and have used electromagnetic relay of the present utility model, described electromagnetic relay, comprise case 4, armature assembly 3, coil component 1 and quiet spring footnote are moulded together pedestal 2, described coil component 1 comprises magnet steel 11d and static magnetic conductor 11c " C " shape parts 11 that constitute and the bobbin 12 that insulate that is injection-moulded in together, be wound with coil 13 on the described bobbin 12, described armature assembly 3 comprises armature 31 and is arranged at least one movable contact spring 33 of described armature 31 sides and they are injection-moulded in together insulating material 32.The magnetic circuit that described magnet steel 11d, static magnetic conductor 11c, coil 13 and armature 31 constitute can form left-right symmetric or asymmetrical magnetic circuit.

Claims

1, a kind of magnetic circuit of electromagnetic relay, comprise static magnetic conductor, magnet steel, coil and movable magnetic conductor, it is characterized in that described magnet steel is placed on the two ends of described static magnetic conductor, both form one " C " shape parts, and the magnet steel at C shape two ends is a magnetic pole, constitutes two magnetic loops independently with another magnetic pole of C shape substantial middle.

2, the magnetic circuit of electromagnetic relay as claimed in claim 1 is characterized in that coil winding on described " C " shape parts, has insulating material between them.

3, the magnetic circuit of electromagnetic relay as claimed in claim 2 is characterized in that described insulating material is injection-moulded in " C " shape parts, or wraps up or be coated on " C " shape parts.

4, the magnetic circuit of electromagnetic relay as claimed in claim 1 is characterized in that the supporting member that the movable magnetic conductor of described supporting rotates is nonmetallic materials.

5, the magnetic circuit of electromagnetic relay as claimed in claim 1 is characterized in that described magnet steel is placed on the two ends of described static magnetic conductor, and the big or small unanimity and the magnetic field intensity of magnet steel are even.

6, the magnetic circuit of electromagnetic relay as claimed in claim 5 is characterized in that at a pole-face of described movable magnetic conductor one antifreeze plate being set, and makes the magnetic field intensity of magnetic circuit inhomogeneous.

7, the magnetic circuit of the electromagnetic relay described in claim 1 is characterized in that two magnetic field intensity is even but the magnet steel that causes not of uniform size is placed on the two ends of described static magnetic conductor.

8, a kind of electromagnetic relay, comprise case, coil component and quiet spring footnote are moulded together pedestal, armature assembly, described coil component comprises magnet steel and " C " the shape parts of static magnetic conductor formation and the bobbin of insulation that is injection-moulded in together, be wound with coil on the described bobbin, described armature assembly comprises armature and is arranged at least one movable contact spring of described armature side and they are injection-moulded in together insulating material, it is characterized in that described magnet steel, static magnetic conductor, the magnetic circuit that coil and movable magnetic conductor constitute can form left-right symmetric or asymmetrical magnetic circuit.