CN211294983U - Magnetic circuit improved electromagnetic relay - Google Patents

Abstract

The utility model relates to the technical field of relays, in particular to a magnetic circuit improved electromagnetic relay, which comprises a terminal module, a magnetic circuit module and an armature module, wherein the magnetic circuit module is detachably connected with the terminal module, and the armature module is detachably connected with the magnetic circuit module; the armature module comprises a limiting piece and an armature piece, and the limiting piece is detachably connected to the magnetic circuit module; the limiting piece is provided with a sliding hole, the armature piece rotates and is movably positioned in the sliding hole, and the armature piece is provided with an arc-shaped part; the limiting piece is provided with a protruding piece which is abutted against the armature piece so that the arc-shaped part is in rolling abutment against the magnetic circuit module; in electromagnetic relay's use, magnetic circuit module drive armature spare rotates, via the setting of arc portion for pivoted armature spare rolls relative magnetic circuit module, reduces wearing and tearing and frictional noise between armature spare and the magnetic circuit module, ensures the rotation that the armature spare can relax, promotes electromagnetic relay's reaction sensitivity.

Description

Magnetic circuit improved electromagnetic relay

Technical Field

The utility model relates to a relay technical field especially discloses a magnetic circuit improvement formula electromagnetic relay.

Background

The relay is a common basic component as an automatic switch in a circuit, the relay is various in types, the electromagnetic relay is a common electromagnetic relay, the electromagnetic relay needs to be provided with an armature, in the using process of the electromagnetic relay, the armature is driven to move by magnetic force, and the moving armature drives a terminal component to be switched on or switched off. The armature installation structure of the electromagnetic relay in the prior art is unreasonable in design, so that the armature is difficult to move, the moving hysteresis of the armature can be greatly caused, the sensitivity of the electromagnetic relay is greatly reduced, and serious people can also cause potential safety hazards.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming and the deficiency that exist among the prior art, the utility model aims to provide a magnetic circuit improvement formula electromagnetic relay, magnetic circuit module drive armature piece rotates, and arc portion makes the relative magnetic circuit module of pivoted armature piece roll, reduces wearing and tearing and frictional noise between armature piece and the magnetic circuit module, ensures the rotation that the armature piece can relax, promotes electromagnetic relay's reaction sensitivity.

In order to achieve the above object, the utility model discloses a magnetic circuit improved electromagnetic relay, including terminal module, magnetic circuit module and armature module, the magnetic circuit module can be dismantled with the terminal module and be connected, the armature module can be dismantled with the magnetic circuit module and be connected, the magnetic circuit module drives end submodule piece through armature module and switches on or breaks off; the armature module comprises a limiting piece and an armature piece, and the limiting piece is detachably connected to the magnetic circuit module; the limiting piece is provided with a sliding hole, the armature piece rotates and is movably positioned in the sliding hole, and the armature piece is provided with an arc-shaped part; the limiting piece is provided with a protruding piece, the protruding piece abuts against the armature piece, so that the arc-shaped portion is in rolling contact with the magnetic circuit module, and the magnetic circuit module drives the armature piece to rotate relative to the limiting piece and enables the arc-shaped portion to roll relative to the magnetic circuit module.

The limiting part is provided with two supporting arms, each supporting arm is provided with a buckling hole, the sliding hole is formed in each supporting arm, and the magnetic circuit module is provided with two buckling blocks extending into the buckling holes of the two supporting arms; the supporting arms are provided with arc-shaped lugs which are respectively positioned at one side of the two supporting arms close to each other, two sides of the arc-shaped part are provided with shaft body parts which respectively rotate and are movably positioned in the sliding holes of the two supporting arms, and the arc-shaped lugs are wound at the outer sides of the shaft body parts.

The free end of the protruding piece is provided with an arc-shaped folding piece, and the bending part of the arc-shaped folding piece extends into the arc-shaped part and rolls to abut against the arc-shaped part.

The terminal module comprises a first body, a movable terminal and a fixed terminal, wherein the movable terminal and the fixed terminal are arranged on the first body; the first body is equipped with the groove of stepping down and with the trompil of the groove intercommunication of stepping down, move terminal, quiet terminal and all have the contact that is located the inslot of stepping down, and the magnetic circuit module covers the opening in the groove of stepping down in order to seal and cover move terminal and quiet terminal, and the trompil runs through the lateral wall of first body in order to show the inslot of stepping down move terminal and quiet terminal.

The first body is provided with a plurality of positioning columns extending into the yielding grooves, the movable terminal and the static terminal are provided with positioning holes, and the plurality of positioning columns respectively extend into the positioning holes of the movable terminal and the positioning holes of the static terminal; the outside of reference column is equipped with the interference fin, interferes the fin and is used for conflicting the interior pore wall of locating hole.

The positioning hole penetrates through the terminal, the magnetic circuit module is provided with a plurality of blind holes, and the free end of the positioning column penetrates through the terminal and extends into the blind holes; the quantity of interference fin is a plurality of, and a plurality of interference fin set up around the central axis of reference column.

The magnetic circuit module is provided with a second body in snap connection with the terminal module, a third body arranged on the second body, an electromagnetic coil wound on the third body, a yoke iron piece arranged on the third body and a permanent magnet, the limiting piece is detachably connected with the second body, and the arc-shaped part is in rolling contact with the middle of the permanent magnet; the polarities of the two ends of the permanent magnet are the same, and the polarity of the middle part of the permanent magnet is opposite to that of one end of the permanent magnet; and after the electromagnetic coil is de-energized, one end of the permanent magnet is used for attracting one end of the armature piece so that one end of the armature piece is in contact with the yoke piece.

The second body is provided with an accommodating groove, the third body and the electromagnetic coil are positioned in the accommodating groove, the second body is provided with an extension arm, and the extension arm is abutted against the third body so that the third body can be withdrawn from the accommodating groove; the third body is provided with a power supply terminal positioned outside the accommodating groove, the third body is provided with a wire passing hole communicated with the accommodating groove, and the free end of the electromagnetic coil is communicated with the power supply terminal outside the accommodating groove through the wire passing hole.

The end of the second body, which is far away from the extension arm, is provided with a guide groove, an insulating push sheet is movably contained in the guide groove, one end of the armature piece is provided with a protruding part arranged at one end of the insulating push sheet, and the other end of the insulating push sheet is arranged at one end of the movable terminal.

The movable terminal is provided with a flat plate part and an elastic part, a contact of the movable terminal is arranged on the elastic part, the first body is provided with a first top block which props against the flat plate part, the magnetic circuit module is provided with a second top block which pushes against the flat plate part, the first top block and the second top block are arranged in a collinear mode, and both sides of the first top block are provided with openings.

The utility model has the advantages that: in electromagnetic relay's use, magnetic circuit module drive armature spare rotates, via the setting of arc portion for pivoted armature spare rolls relative magnetic circuit module, reduces wearing and tearing and frictional noise between armature spare and the magnetic circuit module, ensures the rotation that the armature spare can relax, promotes electromagnetic relay's reaction sensitivity.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the utility model with the insulating housing hidden;

FIG. 2 is a schematic view of the exploded structure of the present invention;

FIG. 3 is an exploded view of the present invention from another perspective;

fig. 4 is a schematic perspective view of the limiting member and the armature member according to the present invention;

fig. 5 is a schematic perspective view of the first body of the present invention.

The reference numerals include:

1-terminal module 2-magnetic circuit module 3-armature module

4-insulating housing 5-locating piece 6-armature piece

7-slide hole 8-arc part 9-protruding piece

11-support arm 12-arc lug 13-axle body part

14-arc folded piece 15-first body 16-movable terminal

17-static terminal 18-abdicating groove 19-hole

21-positioning column 22-positioning hole 23-interference convex rib

24-blind hole 25-second body 26-third body

27-electromagnetic coil 28-permanent magnet 29-accommodation groove

31-extension arm 32-first yoke 33-second yoke

34-guide groove 35-insulation push piece 36-flat plate part

37-first top piece 38-second top piece.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings, which are not intended to limit the present invention.

Please refer to fig. 1 to 5, the utility model discloses a magnetic circuit improvement formula electromagnetic relay, including terminal module 1, magnetic circuit module 2, armature module 3 and insulating casing 4, magnetic circuit module 2 is located between terminal module 1 and armature module 3, magnetic circuit module 2 can be dismantled with terminal module 1 and be connected, armature module 3 can be dismantled with magnetic circuit module 2 and be connected, magnetic circuit module 2 piles up on terminal module 1, armature module 3 is installed in magnetic circuit module 2 top, insulating casing 4 cover is established at terminal module 1, the outside of magnetic circuit module 2 and armature module 3, insulating casing 4 is connected with terminal module 1, according to actual need, insulating casing 4 can be connected with terminal module 1 buckle, also can bond together via glue, magnetic circuit module 2 switches on or breaks off via armature module 3 drive terminal 16 module 1.

The armature module 3 comprises a limiting piece 5 and an armature piece 6, the limiting piece 5 is approximately U-shaped, the limiting piece 5 is formed by bending and punching a metal material, and the limiting piece 5 is detachably connected to the magnetic circuit module 2; the limiting member 5 is provided with a sliding hole 7, and the armature member 6 rotates and is movably located in the sliding hole 7, in this embodiment, the armature member 6 can move in the sliding hole 7 in the up-down direction.

The middle part of the armature piece 6 is provided with an arc-shaped part 8; the limiting piece 5 is provided with a protruding piece 9, the protruding piece 9 is positioned above the armature piece 6, the protruding piece 9 abuts against the armature piece 6, so that the arc-shaped part 8 is in rolling contact with the magnetic circuit module 2, and the protruding piece 9 abuts against and presses the arc-shaped part 8, so that the armature piece 6 is prevented from moving up and down in the slide hole 7; the magnetic circuit module 2 drives the armature piece 6 to rotate relative to the limiting piece 5, and the arc-shaped part 8 rolls relative to the magnetic circuit module 2 when the armature piece 6 rotates.

In electromagnetic relay's use, magnetic circuit module 2 drive armature piece 6 rotates, via the setting of arc portion 8 for pivoted armature piece 6 rolls relative magnetic circuit module 2, reduces wearing and tearing and frictional noise between armature piece 6 and the magnetic circuit module 2, ensures the rotation that armature piece 6 can relax, promotes electromagnetic relay's reaction sensitivity.

The locating part 5 has two support arms 11, and two support arms 11 are separated each other and parallel arrangement, have the knot hole on the support arm 11, and slide opening 7 sets up support arm 11, and slide opening 7 extends the setting along the length direction of support arm 11.

The magnetic circuit module 2 is provided with two buckling blocks which respectively extend into the buckling holes of the two supporting arms 11, the magnetic circuit module 2 is clamped between the two supporting arms 11, the limiting part 5 and the magnetic circuit module 2 are installed together by means of the supporting arms 11 and the buckling blocks, and the installation efficiency and the disassembly efficiency of the limiting part 5 and the magnetic circuit module 2 are improved.

The supporting arms 11 have arc-shaped lugs 12 at the side where the two supporting arms 11 are close to each other, the arc-shaped lugs 12 are approximately U-shaped, and two sides of the arc-shaped part 8 are provided with shaft parts 13 which respectively rotate and are movably positioned in the sliding holes 7 of the two supporting arms 11. In this embodiment, the supporting arm 11 is a substantially rectangular flat plate, and the contact area between the limiting member 5 and the shaft portion 13 is increased by the arrangement of the arc-shaped lug 12, so that the shaft portion 13 can rotate relative to the supporting arm 11, the supporting arm 11 is prevented from cutting the shaft portion 13, and the service lives of the shaft portion 13 and the supporting arm 11 are prolonged. The arc-shaped lugs 12 are wound on the outer side of the shaft body 13, and the arc-shaped lugs 12 are abutted against the top end of the shaft body 13 and the left side and the right side of the shaft body 13.

The arc lugs 12 limit the front and rear directions of the shaft part 13, thereby preventing the armature member 6 from moving forward and backward; the two supporting arms 11 stop against the limiting part 5, so that the armature piece 6 is prevented from moving left and right; the protruding piece 9 presses the armature piece 6 against the magnetic circuit module 2, thereby preventing the armature piece 6 from moving up and down; the armature member 6 is accurately positioned at a desired position, and the armature member 6 is prevented from being displaced and being used badly.

The free end of the protruding piece 9 is provided with an arc-shaped folding piece 14, the arc-shaped folding piece 14 is approximately V-shaped, and the bending part of the arc-shaped folding piece 14 extends into the arc-shaped part 8 and rolls and butts against the arc-shaped part 8. When the magnetic circuit module 2 drives the armature member 6 to rotate relative to the limiting member 5, the arc-shaped folding piece 14 is matched with the arc-shaped portion 8, so that the arc-shaped folding piece 14 rolls relative to the arc-shaped portion 8, friction and friction noise between the protruding piece 9 and the armature member 6 are reduced, and the protruding piece 9 is prevented from blocking the rotation of the armature member 6 and is prevented from being used badly.

The terminal module 1 comprises a first body 15, a movable terminal 16 and a fixed terminal 17, wherein the movable terminal 16 and the fixed terminal 17 are arranged on the first body 15, the movable terminal 16 is driven by the magnetic circuit module 2 to move through the armature module 3, and the movable terminal 16 is switched on or switched off the fixed terminal 17; the first body 15 is provided with a yielding groove 18 and an opening 19 communicated with the yielding groove 18, the yielding groove 18 penetrates through the top surface of the first body 15, the movable terminal 16 and the static terminal 17 are respectively provided with a contact positioned in the yielding groove 18, the magnetic circuit module 2 covers an opening of the yielding groove 18 to seal the movable terminal 16 and the static terminal 17, and the magnetic circuit module 2 encapsulates the terminals in the yielding groove 18 to prevent the terminals from being damaged by touching.

The opening 19 penetrates through the side wall of the first body 15 to expose the movable terminal 16 and the fixed terminal 17 in the receding groove 18, and during actual use, an operator or a camera checks the centrality of the terminal contact through the opening 19, so that the controllability of the terminal installation yield is improved. The outside blowing head blows air into the yielding groove 18 through the opening 19, and then dust adhered to the terminal or dust in the yielding groove 18 is removed, and the dust is prevented from interfering normal conduction of the terminal.

The first body 15 is provided with a plurality of positioning columns 21 extending into the yielding groove 18, the movable terminal 16 and the fixed terminal 17 are provided with positioning holes 22, and the plurality of positioning columns 21 respectively extend into the positioning holes 22 of the movable terminal 16 and the positioning holes 22 of the fixed terminal 17; the inner hole wall of the positioning hole 22 stops against the positioning post 21 to ensure that the terminal is stably positioned on the first body 15, thereby preventing the terminal from moving and being used badly.

The outside of reference column 21 is equipped with and interferes fin 23, interferes fin 23 and is used for conflicting the interior pore wall of locating hole 22, and then interferes the setting of fin 23, increases the frictional force between reference column 21 and the terminal, at the assembly process of reference column 21 and terminal, ensures that the terminal is firmly pre-fixed on reference column 21, prevents that terminal relative reference column 21 from taking place to rotate.

The positioning hole 22 penetrates through the terminal, the magnetic circuit module 2 is provided with a plurality of blind holes 24, and the free end of the positioning column 21 penetrates through the terminal and extends into the blind holes 24; the first body 15 and the magnetic circuit module 2 are used for clamping and fixing the terminal, so that the terminal is prevented from moving up and down and is prevented from being used badly.

In the present embodiment, the number of the interference ribs 23 is plural, the plural interference ribs 23 are disposed around the central axis of the positioning column 21, preferably, the plural interference ribs 23 are in an annular array around the central axis of the positioning column 21, and the interference ribs 23 are disposed in parallel with the central axis of the positioning column 21.

The magnetic circuit module 2 is provided with a second body 25 connected with the terminal module 1 in a buckling manner, a third body 26 arranged on the second body 25, an electromagnetic coil 27 wound outside the third body 26, a yoke iron piece arranged on the third body 26 and a permanent magnet 28, in the embodiment, clamping blocks are arranged on two sides of the first body 15, clamping pieces are arranged on two sides of the second body 25, and the clamping pieces are provided with clamping holes for accommodating the clamping blocks.

The limiting piece 5 is detachably connected with the second body 25, the buckling block is arranged in the middle of the upper end of the second body 25, and the arc-shaped part 8 is in rolling contact with the middle of the permanent magnet 28; the polarity of the two ends of the permanent magnet 28 is the same, and the polarity of the middle part of the permanent magnet 28 is opposite to that of one end of the permanent magnet 28; for example, the polarity of the middle portion of the permanent magnet 28 is the N-pole, and the polarities of both ends of the permanent magnet 283 are the S-poles. Both ends of the yoke iron are respectively used to attract both ends of the armature element 6, and after the electromagnetic coil 27 is de-energized, one end of the permanent magnet 28 is used to attract one end of the armature element 6 so that one end of the armature element 6 contacts the yoke iron.

Two ends of the permanent magnet 28 are respectively correspondingly matched with two ends of the armature piece 6, and two ends of the yoke iron piece are respectively used for attracting two ends of the armature piece 6; when the electromagnetic coil 27 is energized, the yoke has magnetic force, and the magnetic force at the two ends of the yoke is opposite, so that one end of the yoke attracts one end of the armature 6, the magnetic force at the other end of the yoke counteracts the magnetic attraction force of the permanent magnet 28 attracting the armature 6, the two ends of the armature 6 are unbalanced in stress, and the armature 6 is driven to roll relative to the permanent magnet 28 through the arc portion 8 and rotate relative to the limiting member 5, so that the terminal module 1 is switched.

The second body 25 is provided with a containing groove 29, the containing groove 29 penetrates through the top surface of the second body 25 and the side surface of one side of the second body 25, the third body 26 and the electromagnetic coil 27 are both positioned in the containing groove 29, one side of the second body 25 is provided with an extension arm 31, and the extension arm 31 is abutted against the third body 26 so that the third body 26 can be withdrawn from the containing groove 29.

The third body 26 is provided with a power terminal located outside the accommodating groove 29, the lower end of the power terminal penetrates through the first body 15 and is used for being welded to an external conductor, the third body 26 is provided with a wire passing hole communicated with the accommodating groove 29, and the free end of the electromagnetic coil 27 is communicated with the power terminal outside the accommodating groove 29 through the wire passing hole.

During actual manufacturing, stretch out to the storage tank 29 outside with solenoid 27's free end via crossing the wire hole, then weld solenoid 27's free end on the power supply terminal via soldering tin, stretch into the narrow and small storage tank 29 in space in comparison with the power supply terminal, avoid soldering tin damage solenoid 27 on the one hand, on the other hand promotes solenoid 27's free end and power supply terminal welded convenience.

In the present embodiment, the yoke member includes the first yoke 32 and the second yoke 33, the first yoke 32 and the second yoke 33 have the same structure, the first yoke 32 and the second yoke 33 are L-shaped, and one end of the first yoke 32 and one end of the second yoke 33 both extend out of the third body 26 and contact each other, so as to ensure the stability of the transmission of the magnetic induction lines; the other end of the first yoke 32 and the other end of the second yoke 33 are used for attracting the armature member 6.

A guide groove 34 is formed in one end, far away from the extension arm 31, of the second body 25, an insulating push sheet 35 is movably contained in the guide groove 34, a protruding portion is formed at one end of the insulating push sheet 35 and is arranged at one end of the armature piece 6, and a barb is arranged on the protruding portion and hooks the insulating push sheet 35 to prevent the insulating push sheet 35 from being separated from the protruding portion; the other end of the insulating push piece 35 is provided on one end of the movable terminal 16. When the electromagnetic coil 27 drives the armature piece 6 to rotate through the yoke piece, the rotating armature piece 6 drives the insulation push piece 35 to move, the guide groove 34 guides the moving direction of the insulation push piece 35, and the insulation push piece 35 is prevented from being inclined in the moving process and being not used well; the moving insulating push piece 35 drives the movable terminal 16 to switch on or switch off the fixed terminal 17.

The movable terminal 16 is provided with a flat plate part 36 and an elastic part, a contact of the movable terminal 16 is arranged on the elastic part, a free end of the elastic part protrudes out of the first body 15 and is arranged at one end, far away from the armature part 6, of the insulating push sheet 35, the first body 15 is provided with a first ejector block 37 for ejecting the flat plate part 36, the magnetic circuit module 2 is provided with a second ejector block 38 for pressing the flat plate part 36, the first ejector block 37 and the second ejector block 38 are arranged in a collinear mode, and two sides of the first ejector block 37 are provided with openings 19.

The first top block 37 and the second top block 38 are used to firmly clamp the flat plate part 36, when the blowing head blows air into the receding groove 18 through the opening 19, the flat plate part 36 is prevented from moving and poor use is avoided, and the stability of mounting the movable terminal 16 is ensured. When the blowing head blows air into the abdicating groove 18 through the opening 19 at one side of the first top block 37, the air entering the abdicating groove 18 flows out through the opening 19 at the other end of the first top block 37.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. A magnetic circuit improved electromagnetic relay comprises a terminal module, a magnetic circuit module and an armature module, wherein the magnetic circuit module is detachably connected with the terminal module, the armature module is detachably connected with the magnetic circuit module, and the magnetic circuit module is connected or disconnected by driving the terminal module through the armature module; the method is characterized in that: the armature module comprises a limiting piece and an armature piece, and the limiting piece is detachably connected to the magnetic circuit module; the limiting piece is provided with a sliding hole, the armature piece rotates and is movably positioned in the sliding hole, and the armature piece is provided with an arc-shaped part; the limiting piece is provided with a protruding piece, the protruding piece abuts against the armature piece, so that the arc-shaped portion is in rolling contact with the magnetic circuit module, and the magnetic circuit module drives the armature piece to rotate relative to the limiting piece and enables the arc-shaped portion to roll relative to the magnetic circuit module.

2. The magnetic circuit improved electromagnetic relay according to claim 1, wherein: the limiting part is provided with two supporting arms, each supporting arm is provided with a buckling hole, the sliding hole is arranged in each supporting arm, and each magnetic circuit module is provided with two buckling blocks which respectively extend into the buckling holes of the two supporting arms; the supporting arms are provided with arc-shaped lugs which are positioned on one side of the two supporting arms, the arc-shaped lugs are close to one side of the two supporting arms, shaft body parts which rotate and are movably positioned in the sliding holes of the two supporting arms respectively are arranged on two sides of the arc-shaped parts, and the arc-shaped lugs are wound on the outer sides of the shaft body parts.

3. The magnetic circuit improved electromagnetic relay according to claim 1, wherein: the free end of the protruding piece is provided with an arc-shaped folding piece, and the bending part of the arc-shaped folding piece extends into the arc-shaped part and rolls and abuts against the arc-shaped part.

4. The magnetic circuit improved electromagnetic relay according to claim 1, wherein: the terminal module comprises a first body, a movable terminal and a fixed terminal, the movable terminal and the fixed terminal are arranged on the first body, the movable terminal is driven by the magnetic circuit module to move through the armature module, and the movable terminal is connected or disconnected with the fixed terminal; the first body is equipped with the groove of stepping down and with the trompil of the groove intercommunication of stepping down, move terminal, quiet terminal and all have the contact that is located the inslot of stepping down, and the magnetic circuit module covers the opening in the groove of stepping down in order to seal and cover move terminal and quiet terminal, and the trompil runs through the lateral wall of first body in order to show the inslot of stepping down move terminal and quiet terminal.

5. The magnetic circuit improved electromagnetic relay according to claim 4, wherein: the first body is provided with a plurality of positioning columns extending into the abdicating groove, the movable terminal and the static terminal are provided with positioning holes, and the plurality of positioning columns respectively extend into the positioning holes of the movable terminal and the positioning holes of the static terminal; the outside of reference column is equipped with the interference fin, interferes the fin and is used for conflicting the interior pore wall of locating hole.

6. The magnetic circuit improved electromagnetic relay according to claim 5, wherein: the positioning hole penetrates through the terminal, the magnetic circuit module is provided with a plurality of blind holes, and the free end of the positioning column penetrates through the terminal and extends into the blind holes; the quantity of interference fin is a plurality of, and a plurality of interference fin set up around the central axis of reference column.

7. The magnetic circuit improved electromagnetic relay according to claim 1, wherein: the magnetic circuit module is provided with a second body in buckling connection with the terminal module, a third body arranged on the second body, an electromagnetic coil wound on the third body, a yoke iron piece arranged on the third body and a permanent magnet, the limiting piece is detachably connected with the second body, and the arc-shaped part is in rolling contact with the middle of the permanent magnet; the polarities of the two ends of the permanent magnet are the same, and the polarity of the middle part of the permanent magnet is opposite to that of one end of the permanent magnet; and after the electromagnetic coil is de-energized, one end of the permanent magnet is used for attracting one end of the armature piece so that one end of the armature piece is in contact with the yoke piece.

8. The magnetic circuit improved electromagnetic relay according to claim 7, wherein: the second body is provided with an accommodating groove, the third body and the electromagnetic coil are positioned in the accommodating groove, the second body is provided with an extension arm, and the extension arm is abutted against the third body so that the third body can be withdrawn from the accommodating groove; the third body is provided with a power supply terminal positioned outside the accommodating groove, the third body is provided with a wire passing hole communicated with the accommodating groove, and the free end of the electromagnetic coil is communicated with the power supply terminal outside the accommodating groove through the wire passing hole.

9. The magnetic circuit improved electromagnetic relay according to claim 8, wherein: one end of the second body, which is far away from the extension arm, is provided with a guide groove, an insulating push sheet is movably contained in the guide groove, one end of the armature piece is provided with a protruding part arranged at one end of the insulating push sheet, and the other end of the insulating push sheet is arranged at one end of the movable terminal.

10. The magnetic circuit improved electromagnetic relay according to claim 4, wherein: the movable terminal is provided with a flat plate part and an elastic part, a contact of the movable terminal is arranged on the elastic part, the first body is provided with a first top block which props against the flat plate part, the magnetic circuit module is provided with a second top block which pushes against the flat plate part, the first top block and the second top block are arranged in a collinear mode, and both sides of the first top block are provided with holes.

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