CN214956711U - Electromagnetic release and electrical protection device comprising same - Google Patents

Abstract

The utility model discloses an electromagnetism release and including electrical protection equipment of this electromagnetism release relates to electromagnetic tripping device technical field. The utility model provides an electromagnetic release, which comprises a magnetic yoke, an armature, a permanent magnet, a reset spring and a reset column, wherein the magnetic yoke comprises two branches with polar surfaces; the armature is rotationally connected to one branch of the magnetic yoke and can be attached to the two polar surfaces to form a closed magnetic loop; the permanent magnet provides magnetic force for the armature iron to keep the state of attaching to the two polar surfaces; the return spring is connected with the armature and provides elasticity for the armature to separate from the two polar surfaces; the reset column is abutted against the armature and is used for driving the armature to rotate so as to be attached to the two polar surfaces for resetting; the other branch of the magnetic yoke is arranged against the reset column. Lean on the post setting that resets with yoke branch, when resetting, carry out better ground bearing to armature, reduce the deformation of armature, the utility model discloses an electromagnetic trip and electrical protection equipment have reliability, the high characteristics of stability.

Description

Electromagnetic release and electrical protection device comprising same

Technical Field

The utility model relates to an electromagnetic tripping device technical field especially relates to an electromagnetic trip and including electrical protection equipment of this electromagnetic trip.

Background

An electromagnetic release is one of releases and is mainly used for short-circuit protection of circuits.

In the prior art, chinese patent No. CN1763884B discloses an electromagnetic trip device and an electrical protection apparatus including the same, the electromagnetic trip device includes a U-shaped armature, a trip coil, a paddle, a spring of the paddle, and a return pin of the paddle, the paddle pivots relative to the armature and can move to the polar surfaces at the two ends of the armature to close a magnetic circuit formed by the armature and the paddle, the trip coil is installed around a casing surrounding the circuit; when the magnetic field generator is in a standing state, no current flows in the coil, and the blade is kept to lean against the armature by magnetic flux generated by the magnet; when a current is present in the coil, the leaf opens when this current has reached a certain magnitude predetermined by the balance between the torque of the spring and the magnetic torque produced by the magnetic flux generated by the magnet.

Because magnet setting deviates from the opposite one side of reset pin post at the acanthus leaf, and paste the state mutually at acanthus leaf and polarity surface, there is the air gap magnet and acanthus leaf, after the tripping operation, when supporting to push away the acanthus leaf through the round pin axle that resets and reset, the middle part application of force of round pin axle to the acanthus leaf that resets, if reset when the round pin axle that resets the thrust that applys to the acanthus leaf was too big or after resetting many times, the acanthus leaf can take place middle part concave, the deformation that both ends upwarp, lead to the clearance between acanthus leaf and the magnet to change, and then influence electromagnetic tripping device's normal dropout.

Accordingly, there is a need to provide a new, more stable electromagnetic trip solution.

SUMMERY OF THE UTILITY MODEL

In order to overcome at least one defect of the prior art, the utility model discloses a first aim at provides an electromagnetic release to solve current electromagnetic release and use unstable problem.

The utility model discloses a solve the technical scheme that its problem adopted and be:

an electromagnetic release comprising:

a yoke comprising two branches having polar surfaces;

the armature is rotationally connected to one branch of the magnetic yoke and can be attached to the two polar surfaces to form a closed magnetic loop;

the permanent magnet provides magnetic force for keeping the armature iron and the two polar surfaces in a state of being attached to each other;

the return spring is connected with the armature and provides elastic force for the armature to separate from the two polar surfaces; and

the reset column is abutted against the armature and is used for driving the armature to rotate so as to be attached to the two polar surfaces to reset;

wherein the other branch of the yoke is disposed against the reset post.

The utility model provides an electromagnetic release leans on the post that resets to set up a branch of yoke to when the post that resets supports and pushes away armature and reset, branch can carry out better ground bearing to armature, thereby avoids the post that resets to support the armature to press and cause armature to warp and then influence electromagnetic release's stability in use, makes electromagnetic release's reliability, stability improve.

Furthermore, an excitation coil is arranged on the magnetic yoke, and the excitation coil is connected with the magnetic yoke by the branch of the reset column.

Further, the magnet yoke further comprises a body, wherein a branch connected with the excitation coil is detachably connected with the body, and the other branch is integrally formed with the body.

Furthermore, a bayonet is arranged on the body, and the branches are inserted into the bayonet and fixed.

Further, the armature is rotatably connected with the branch, and the rotating shaft of the armature is movably arranged relative to the branch along the normal direction parallel to the polar surface.

Furthermore, a non-magnetic-conductive support is fixedly arranged on a branch of the magnetic yoke, the armature is rotatably connected with the support, a rotating shaft of the armature rotating around the support is slidably connected with the support, and the rotating shaft slides relative to the support along a normal direction parallel to the polar surface.

Furthermore, the armature is provided with a rotating support surface which is attached to the surface of the support and can slide along the surface of the support, and the armature can rotate relative to the support around the rotating support surface.

Furthermore, a non-magnetic connecting piece is fixed on the armature, and the rotating supporting surface is arranged on the connecting piece.

Further, an angle limiting structure is arranged between the support and the armature and can be attached to the surface of at least one of the support and the armature so as to limit the rotation angle of the armature relative to the magnetic yoke.

Further, the angle limiting structure is an inclined abutting surface arranged on one side of the rotating support surface, and the inclined abutting surface can be abutted with the surface of the support to limit the rotating angle of the armature relative to the magnetic yoke.

Based on the same inventive concept, a second object of the present invention is to provide an electrical protection device, which includes the above electromagnetic release.

To sum up, the utility model provides an electromagnetic trip and contain this electromagnetic trip's electrical apparatus protection equipment has following technological effect:

1) through leaning on the post setting that resets with yoke branch, when reseing, carry out better bearing to armature, reduce the deformation of armature to improve electromagnetic trip's reliability and stability.

2) The branch connected with the excitation coil and the body of the magnet yoke are arranged in a detachable connection mode, so that the processing difficulty can be reduced, and the precision can be ensured;

3) the armature is rotatably connected with the branch of the magnetic yoke and can move relative to the magnetic yoke along the normal direction parallel to the polar surface, so that the armature swings relative to the magnetic yoke when tripping is performed, and the tripping is rapid;

4) the armature is connected with the support through a non-magnetic connecting piece, so that the production and the processing are convenient.

5) The inclined abutting surface arranged on one side of the rotary support of the connecting piece can play a role in limiting the rotation angle of the armature, and the connecting piece is ingenious in structure and easy to process.

Drawings

Fig. 1 is an exploded view of an electromagnetic release according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of an electromagnetic release in a triggered and tripped state according to an embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of an electromagnetic release in an embodiment of the present invention in a state of releasing without triggering;

fig. 4 is a schematic structural diagram of the excitation coil, the yoke and the support of the electromagnetic release according to an embodiment of the present invention;

fig. 5 is a schematic structural view of the buffering elastic sheet and the connecting member according to an embodiment of the present invention.

Wherein the reference numerals have the following meanings:

1. a housing; 101. a box body; 1011. a buckling part; 102. a cover plate; 1021. enclosing plates; 1022. accommodating grooves; 1023. buckling the salient points; 2. a trip assembly; 201. a magnetic yoke; 2011. a body; 20111. a bayonet; 2012. branching; 20121. a polar surface; 20122. clamping the bulges; 202. a field coil; 203. an armature; 204. a permanent magnet; 205. a return spring; 206. a reset column; 20601. a limiting table; 3. a support; 301. connecting holes; 302. a second spring hook; 4. a connecting member; 401. rotating the support surface; 402. an inclined abutting surface; 5. a first spring hook; 6. a buffering elastic sheet; 601. a fixed end; 602. a movable end; 603. an arching portion; 7. connecting the bosses; 701. a reset hole.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Referring to fig. 1-5, the utility model discloses an electromagnetic release, including casing 1, set up the dropout subassembly 2 in casing 1, this dropout subassembly 2 includes yoke 201, excitation coil 202, armature 203, permanent magnet 204, reset spring 205 and reset post 206.

The magnetic yoke 201 includes a body 2011 and two branches 2012, and the two branches 2012 are both provided with a polar surface 20121.

The excitation coil 202 is provided on the yoke 201.

The armature 203 is rotatably connected to one 2012 of the two branches 2012 of the yoke 201, and the armature 203 can rotate relative to the yoke 201 to abut against the two polar surfaces 20121 to form a closed magnetic circuit.

Referring to fig. 3, when the electromagnetic release is in an unexcited release state, the permanent magnet 204 is used to provide a magnetic force for the armature 203 to keep in contact with the two polar surfaces 20121, and when the armature 203 is in contact with the two polar surfaces 20121, an air gap is kept between an end surface of the permanent magnet 204 and the armature 203 to reduce the current required for releasing.

In one possible embodiment, the field coil 202 is provided on the body 2011.

Referring to fig. 1 to 3, in the present embodiment, the excitation coil 202 is disposed on the branch 2012 of the yoke 201, specifically, the branch 2012 connected to the excitation coil 202 and the branch 2012 connected to the armature 203 are two different branches 2012, and the permanent magnet 204 is disposed on a side of the excitation coil 202 away from the rotation axis of the armature 203 even though the branch 2012 connected to the excitation coil 202 is located between the branch 2012 connected to the armature 203 and the permanent magnet 204.

Referring to fig. 1 to 3, in a preferred embodiment, the permanent magnet 204 is fixed to the body 2011 of the yoke 201.

In other possible embodiments, the permanent magnet 204 may be fixed with the housing 1.

Referring to fig. 1 to 4, further, as a preferred embodiment, in this embodiment, the body 2011 is horizontally disposed, the two branches 2012 are perpendicular to the body 2011, so that the yoke 201 is in an F shape rotated by 90 ° counterclockwise, the permanent magnet 204 is fixed to the yoke 201, and the branch 2012 connected to the excitation coil 202 is located between the branch 2012 connected to the armature 203 and the permanent magnet 204, so that the permanent magnet 204 is connected to the yoke 201 and then integrally forms an E shape rotated by 90 ° counterclockwise.

A return spring 205 is coupled to the armature 203 to provide a spring force to disengage the armature 203 from the bipolar surfaces 20121 when the electromagnetic release is in a tripped condition, see fig. 2.

The reset post 206 abuts against the armature 203 and is used for driving the armature 203 to rotate relative to the yoke 201, so that the armature 203 abuts against the two polar surfaces 20121 to realize reset.

Referring to fig. 3, in the present embodiment, when the electromagnetic release is in the non-triggered release state, the reset rod 206 presses against the middle position of the armature 203, and the branch 2012 fixed to the excitation coil 202 is disposed below the reset rod 206 by the reset rod 206.

Further, when the armature 203 abuts against the polar surface 20121, the reset rod 206 is aligned with the branch 2012 of the branch 2012 provided with the exciting coil 202, or the reset rod 206 is slightly offset from the branch 2012 provided with the exciting coil 202 (see fig. 3), that is, when the armature 203 abuts against the polar surface 20121, the reset rod 206 may abut against the middle position of the armature 203, and the position where the branch 2012 provided with the exciting coil 202 abuts against the armature 203 may be located at the middle position of the armature 203, or may be located at both sides of the middle position by slightly offsetting the middle position of the armature 203.

Referring to fig. 4, further, a branch 2012 connected to the excitation coil 202 is detachably connected to the body 2011, and the other branch 2012 is integrally formed with the body 2011; because the branch 2012 connected with the excitation coil 202 requires high processing precision, if the two branches 2012 are integrally formed with the body 2011, the cost is high and the manufacturing difficulty is high, so that the manufacturing difficulty can be reduced by adopting the arrangement mode, and the processing precision of the branch 2012 connected with the excitation coil 202 is easily ensured.

Referring to fig. 4, in a further preferred embodiment, in the present embodiment, a bayonet 20111 is disposed on the body 2011, and the branch 2012 is inserted into the bayonet 20111 for fixing, so as to simplify the structure and facilitate assembly.

Referring to fig. 1, 2, 3 and 5, further, as a preferred embodiment, in the present embodiment, the armature 203 is rotatably connected to the branch 2012 of the yoke 201, and the armature 203 can be movably disposed relative to the yoke 201 along a direction parallel to the normal of the polar surface 20121, so as to achieve an effect of increasing the tightness of the contact between the armature 203 and the polar surface 20121 of the branch 2012, so as to reduce the possibility of magnetic leakage.

More preferably, referring to fig. 1, fig. 2, fig. 3 and fig. 5, in this embodiment, a non-magnetic seat 3 is fixedly disposed on a branch 2012 of a yoke 201, an armature 203 is rotatably connected to the seat 3, and a rotation shaft of the armature 203 rotating around the seat 3 is slidably connected to the seat 3, the rotation shaft slides relative to the seat 3 along a normal direction parallel to a polar surface 20121, so that the armature 203 can rotate relative to the yoke 201 and can also be movably disposed relative to the yoke 201 along a normal direction parallel to the polar surface 20121, when a trip is triggered, the armature 203 swings relative to the seat 3 under the pulling of a return spring 205, and the trip is rapid; in a normal state of triggering the release, the armature 203 can slide relative to the support 3, so that the attaching effect of the armature 203 and the carrying surface is better, and the possibility of magnetic leakage is reduced.

Further, referring to fig. 1, 2, 3 and 5, in a possible embodiment, the armature 203 is provided with a rotation support surface 401 which is in contact with and can slide along the surface of the support 3, and the armature 203 can rotate relative to the support 3 around the rotation support surface 401.

As a more preferable embodiment, in this embodiment, the armature 203 is fixed with a non-magnetic connecting member 4, and the rotation supporting surface 401 is disposed on the connecting member 4; the connecting piece 4 is connected with the support 3, so that the processing difficulty is reduced, and the abrasion of the armature 203 is reduced, so that the service life is influenced.

Further, in order to avoid that the armature 203 rotates relative to the support 3 by an excessively large opening angle when tripping is triggered, an angle limiting structure (not labeled in the figure) is further arranged between the support 3 and the armature 203, and the angle limiting structure can be attached to the surface of at least one of the support 3 and the armature 203 so as to limit the rotation angle of the armature 203 relative to the magnetic yoke 201.

As a preferred embodiment, in the present embodiment, the angle limiting structure is an inclined abutment surface 402 provided on the side of the rotation support surface 401, and the inclined abutment surface 402 can abut against the surface of the holder 3 to limit the rotation angle of the armature 203 with respect to the yoke 201.

Specifically, in the present embodiment, the inclined abutment surface 402 is provided on the link 4 on the side of the rotation support surface 401.

Referring to fig. 1, 2, 3 and 5, in this embodiment, the connecting element 4 is provided with the inclined abutting surfaces 402 on both sides of the rotation supporting surface 401, so that the connecting element 4 is in a V-shaped structure, and the rotation supporting surface 401 is a tip of the V-shaped structure, which is used as a rotation fulcrum of the connecting element 4 relative to the support 3, that is, a fulcrum of the armature 203 relative to the support 3, and a rotation axis of the armature 203 and the connecting element 4.

Further, in order to avoid abrasion of the rotation supporting surface 401 caused by repeated rotation of the connecting member 4, the rotation supporting surface 401 is configured as a cambered surface; and a wear-resistant coating can be formed on the rotating supporting surface 401, so that the service life of the repeated action of the armature 203 is prolonged, and the service life of the electromagnetic release is further prolonged.

One possible implementation is: a limit block (not shown in the figure) is arranged on the support 3, and the armature 203 is tripped and abuts against the limit block after swinging relative to the support 3, so that the rotation opening angle of the armature 203 is limited by the limit block.

In other possible embodiments, a limit post (not shown in the drawings) may be provided on the connecting member 4 or the armature 203, and after the armature 203 is tripped and swings relative to the support 3, the limit post abuts against the surface of the support 3, so that the opening angle of the armature 203 is limited by the rotation.

Further, as a preferred embodiment, the holder 3 is detachably fixedly coupled with the yoke 201.

Furthermore, referring to fig. 4 as a preferred embodiment, in this embodiment, a clamping protrusion 20122 is disposed on a side surface of a branch 2012 of the magnetic yoke 201, a connecting hole 301 tightly fitted with the clamping protrusion 20122 is disposed on the support 3, and the clamping protrusion 20122 is in clamping fit with the connecting hole 301, so that the support 3 and the magnetic yoke 201 can be detachably connected, and therefore, the support 3 and the magnetic yoke 201 can be conveniently mounted and dismounted, and the production, processing and assembly are convenient.

Furthermore, as a preferred implementation manner, in the present embodiment, the connection hole 301 is a through hole, and the connection hole 301 is set as a through hole, so that the connection condition between the support 3 and the magnetic yoke 201 can be observed conveniently in the assembling process, and the assembling is convenient;

in other possible embodiments, the connection hole 301 may also be configured as a blind hole.

Referring to fig. 1, 2, 3 and 5, as a possible embodiment, the armature 203 is further provided with a first spring hook 5 to which a return spring 205 is connected.

As a further preferred embodiment, the first spring hook 5 is integrally formed with the connecting piece 4.

Furthermore, the first spring hook 5 is formed by bending a part of the plate material of the connecting piece 4, so that the processing is convenient, and the material is saved.

Further, the first spring hook 5 abuts against the end of the armature 203, so that the armature 203 can be positioned in an auxiliary manner, and the armature 203 and the connecting piece 4 can be fixed conveniently.

Further, as a more preferable embodiment, the inner side surface of the connecting piece 4 is attached to the side surface of the armature 203 to assist in fixing the armature 203, so that the influence of the transmission of the armature 203 relative to the connecting piece 4 on the processing precision when the armature 203 and the connecting piece 4 are fixed is avoided, and in addition, the connection strength between the armature 203 and the connecting piece 4 is favorably enhanced.

Further, as a possible implementation manner, a second spring hook 302 is arranged on the support 3, and two ends of the return spring 205 are respectively connected with the first spring hook 5 and the second spring hook 302; therefore, the return spring 205 can be fixed with the yoke 201 and then assembled into the housing 1, which is convenient for debugging.

Referring to fig. 1, 2, 3 and 5, further, as a preferred embodiment, in the present embodiment, the armature 203 is provided with a buffering elastic sheet 6, and the buffering elastic sheet 6 is located on a side of the armature 203 away from the polar surface 20121; the buffering elastic sheet 6 is used for buffering the reset force applied by the reset column 206 to the armature 203, so that the deformation of the armature 203 is reduced.

Further, as a preferred embodiment, referring to fig. 1, fig. 2, fig. 3 and fig. 5, in the present embodiment, the buffering elastic sheet 6 includes a fixed end 601 and a movable end 602, the fixed end 601 and the movable end 602 form an arch portion 603 away from the surface of the armature 203, the return post 206 abuts against one side of the arch portion 603, the fixed end 601 is fixed with the armature 203, and the movable end 602 can slide along the surface of the armature 203; with this arrangement, when the return post 206 applies a force to the cushion spring 6, the arching portion 603 can be deformed in a direction approaching the armature 203, and the movable portion can slide along the surface of the armature 203, thereby achieving a good cushion effect.

Further, the buffering elastic sheet 6 is a non-magnetic sheet.

Furthermore, the buffering elastic sheet 6 and the connecting piece 4 are integrally formed, so that the material is saved, and the economy is better.

Further, as a preferred embodiment, referring to fig. 1, the housing 1 includes a closed case 101 having an opening at one end and a cover plate 102 detachably connected to the case 101 and closing the opening;

the cover plate 102 is provided with a receiving groove 1022 formed by surrounding plates 1021, so that the magnetic yoke 201, the excitation coil 202, the armature 203, the permanent magnet 204 and the return spring 205 can be installed in the receiving groove 1022, and then the cover plate 102 is installed in the box 101 from the opening of the box 101, and the assembly is convenient.

Referring to fig. 1, as a preferred embodiment, in this embodiment, the box 101 and the cover plate 102 are connected by a snap structure.

More specifically, referring to fig. 1, a snap bump 1023 is arranged on the cover plate 102, a snap-on portion 1011 matched with the snap bump 1023 is arranged on the box body 101, and the box body 101 and the cover plate 102 are detachably connected through the cooperation of the snap-on portion 1011 and the snap bump 1023.

Further, referring to fig. 1, fig. 2, and fig. 3, as a preferred embodiment, in this embodiment, the housing 1 is further provided with a connecting boss 7, the connecting boss 7 is provided with a reset hole 701 through which the reset column 206 penetrates, and the connecting boss 7 can extend a contact length between the reset column 206 and the housing 1, so as to prevent the reset column 206 from shaking.

Further, referring to fig. 2 and 3, as a preferred embodiment, in the present embodiment, the connection table is integrally formed with the box 101.

Further, referring to fig. 1, 2, and 3, a limit stop 20601 is disposed at an end of the reset post 206 abutting against the armature 203, and the limit stop 20601 can abut against the surface of the connection boss 7 to limit the reset post 206 from being separated from the housing 1.

Further, as a preferred embodiment, when the inclined abutting surface 402 abuts against the surface of the support 3, the limit stop 20601 can abut against the surface of the connecting boss 7; the connection boss 7 can thus assist in the limit of the inclined abutment surface 402 of the connection piece 4, making it better limiting the angle of rotation of the armature 203.

The utility model provides an electromagnetic trip passes through air gap holding device, through setting up yoke 201 branch 2012 by the post 206 that resets, when resetting, carries out better bearing to armature 203, reduces armature 203's deformation to improve electromagnetic trip's reliability and stability;

furthermore, the utility model provides an electromagnetic trip adopts the structural design who prevents the magnetic leakage, further improves, improves the stability that electromagnetic trip used, makes the realization of the electromagnetic trip of low-power consumption, undercurrent work possible.

To sum up, the utility model provides an electromagnetic trip has the characteristics that stability in use, reliability are high.

Example 2

This embodiment discloses an electrical protection device, which includes any one of the electromagnetic trips of embodiment 1, and the electrical protection device may be an earth leakage protection switch.

Through adopting the electromagnetic trip that stability is higher, this electrical apparatus protection equipment can have the strong advantage of stability in use.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (10)

1. An electromagnetic release, comprising:

a yoke (201), said yoke (201) comprising two branches (2012) having polar surfaces (20121);

the armature (203) is rotatably connected to one branch (2012) of the magnetic yoke (201) and can be attached to the two polar surfaces (20121) to form a closed magnetic circuit;

the permanent magnet (204) provides magnetic force for keeping the armature (203) attached to the two polar surfaces (20121);

a return spring (205) connected to the armature (203) to provide a spring force for the armature (203) to disengage from the polar surfaces (20121); and

the reset column (206) is abutted against the armature (203) and is used for driving the armature (203) to rotate so as to be attached to the two polar surfaces (20121) for resetting;

wherein the other branch (2012) of the yoke (201) is disposed against the reset post (206).

2. Electromagnetic trip according to claim 1, characterized in that an excitation coil (202) is arranged on the yoke (201), the excitation coil (202) being connected to the yoke (201) by the branches (2012) of the return leg (206).

3. Electromagnetic trip according to claim 2, characterized in that the yoke (201) further comprises a body (2011), wherein a branch (2012) connected to the field coil (202) is detachably connected to the body (2011) and the other branch (2012) is integrally formed with the body (2011).

4. An electromagnetic trip according to any of claims 1-3, characterised in that the armature (203) is rotatably connected to the branch (2012) and that the axis of rotation of the armature (203) is movably arranged in relation to the branch (2012) in a direction parallel to the normal of the polar surface (20121).

5. An electromagnetic trip according to claim 4, characterised in that a magnetically non-conductive abutment (3) is fixedly arranged on the limb (2012) of the yoke (201), the armature (203) being rotatably connected to the abutment (3), the armature (203) being slidably connected to the abutment (3) about an axis of rotation of the abutment (3), the axis of rotation sliding relative to the abutment (3) in a direction parallel to the normal of the polar surface (20121).

6. An electromagnetic release according to claim 5, characterised in that the armature (203) is provided with a rotary support surface (401) which abuts against and is slidable along the surface of the support (3), the armature (203) being rotatable about the rotary support surface (401) relative to the support (3).

7. An electromagnetic release according to claim 6, wherein a magnetically non-conductive connecting piece (4) is fixed to the armature (203), the rotary support surface (401) being arranged at the connecting piece (4).

8. An electromagnetic release according to claim 6 or 7, characterized in that an angular stop is further provided between the support (3) and the armature (203), said angular stop being able to abut against a surface of at least one of the support (3) and the armature (203) to define the angle of rotation of the armature (203) relative to the yoke (201).

9. An electromagnetic release according to claim 8, wherein the angular limit formation is a slanted abutment surface (402) provided on the side of the rotation support surface (401), the slanted abutment surface (402) being capable of abutting against a surface of the abutment (3) to define the angle of rotation of the armature (203) relative to the yoke (201).

10. Electrical protection device, characterized in that it comprises an electromagnetic trip according to any one of claims 1 to 9.

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