Linear motion electromagnetic mechanism and electromagnetic relay

Abstract

The electromagnetic mechanism comprises a yoke part, a first bipolar charging permanent magnet, a second bipolar charging permanent magnet and a coil driving part, a frame-shaped part is formed on the yoke part, and the first bipolar charging permanent magnet and the second bipolar charging permanent magnet are arranged on the two opposite inner walls of the frame-shaped part respectively. Two opposite parallel magnetic fields are formed; the coil driving part is at least partially arranged in the frame-shaped part and can linearly move back and forth in the distribution direction of the two parallel magnetic fields; a guide structure made of a non-plastic material is arranged between the coil driving part and the yoke part, and the guide structure guides the linear motion of the coil driving part. The coil driving part can stably move in the magnetic circuit in the set direction, meanwhile, the situation that a plastic part of the coil driving part collides with metal and is abraded is avoided, the magnetic circuit structure is more stable, the problem of scrap hanging caused by friction is solved, the assembly precision is improved, and the product failure risk is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a linear motion electromagnetic mechanism and an electromagnetic relay. Background Art

[0002] The linear motion electromagnetic relay is a control element that drives the coil driving component to move linearly through electromagnetic force, thereby realizing the opening and closing or switching of contacts, which solves the problem of the large thickness of the traditional snap-on relay. A linear motion electromagnetic relay in the prior art, whose electromagnetic mechanism includes a yoke component and a coil driving component, the yoke component is formed with a frame-shaped portion, the coil driving component includes a coil, a plastic part, two armatures and an iron core combined together, and the first bipolar permanent magnet and the second bipolar permanent magnet are respectively arranged on the two opposite inner walls of the frame-shaped portion to form two parallel magnetic fields in opposite directions. The two half rings of the coil in the coil driving component will be subjected to the same direction of Ampere force, so that the coil is energized in both directions to realize the bidirectional movement of the entire coil driving component, thereby realizing the switching work of the relay. The above coil drive component contacts and cooperates with the yoke component through the plastic part. During the high-speed operation of the coil drive component, due to the difference in strength between the plastic part and the metal part, the plastic part is prone to mechanical wear and plastic chips in the process of hitting the yoke component, resulting in the deterioration of the magnetic circuit matching accuracy with the increase in the number of uses, causing the matching gap between the magnetic circuit components to increase or wear, resulting in increased magnetic resistance and reduced magnetic flux, thereby reducing the magnetic circuit holding force, resulting in unstable relay operation, and even malfunction or non-operation. The generated plastic chips may accumulate near the contacts of the relay, hindering the normal contact of the contacts, thereby affecting the reliability of the electrical contact. The plastic chips may also accumulate in the air gap of the magnetic circuit, which will increase the magnetic resistance of the air gap, affect the normal distribution of the magnetic flux, and further affect the magnetic attraction and holding force of the relay. The accumulation of plastic chips may also cause the mechanical parts inside the relay to get stuck or the movement to be blocked. Summary of the invention

[0003] The present invention aims at solving the technical problems in the prior art and provides an electromagnetic mechanism for linear motion and an electromagnetic relay, which greatly improve the motion accuracy of the coil driving component and greatly reduce the generation of plastic chips through structural improvement.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: An electromagnetic mechanism for linear motion includes a yoke iron component, a first bipolar permanent magnet, a second bipolar permanent magnet, and a coil driving component. The yoke iron component forms a frame-shaped part. The first bipolar permanent magnet and the second bipolar permanent magnet are respectively arranged on two opposite inner walls of the frame-shaped part, and form two parallel magnetic fields in opposite directions. The coil driving component is at least arranged inside the frame-shaped part and can perform linear reciprocating motion in the distribution direction of the two parallel magnetic fields. A guiding structure made of non-plastic material is arranged between the coil driving component and the yoke iron component, and this guiding structure guides the linear motion of the coil driving component.

[0005] In a preferred embodiment, the guiding structure includes a plurality of guiding members and guiding recesses respectively arranged corresponding to each guiding member. The guiding members and / or the guiding recesses are made of non-magnetic materials, and the guiding members and / or the guiding recesses are strip-shaped and extend along the moving direction of the coil driving component. One of the coil driving component and the yoke iron component is provided with the guiding members, and the other of the coil driving component and the yoke iron component is provided with the guiding recesses. Each guiding member is respectively slidably connected with the corresponding guiding recess along the moving direction of the coil driving component.

[0006] In a preferred embodiment, the guiding members are fixed to the yoke iron component, and the guiding recesses include guiding grooves arranged on the armature and / or the iron core of the coil driving component.

[0007] In a preferred embodiment, the guiding members are guiding rods, and two ends of each guiding rod are respectively fixed to two sides of the frame-shaped part in the moving direction of the coil driving component.

[0008] In a preferred embodiment, the guiding recesses include guiding grooves arranged on each armature of the coil driving component, and the plastic parts and the iron cores on the coil driving component are respectively provided with relief grooves corresponding to the guiding members.

[0009] In a preferred embodiment, the guiding members are fixed to the coil driving component; two ends of the guiding members respectively protrude beyond two sides of the coil driving component in the moving direction, the guiding recesses include guiding holes respectively arranged on the yoke iron component corresponding to two ends of the guiding members, and two ends of the guiding members are respectively movably inserted into the corresponding guiding holes, or the guiding recesses include guiding grooves respectively arranged on the inner wall of the yoke iron component corresponding to each guiding member.

[0010] In a preferred embodiment, the guiding members are guiding rods, and the guiding rods are integrally injection-molded with the coil driving component by insert molding, or the guiding rods are inserted and fixed to the coil driving component.

[0011] In a preferred embodiment, the inner wall of the frame-shaped part is provided with a plurality of first positioning protrusions for positioning the first bipolar permanent magnet and a plurality of second positioning protrusions for positioning the second bipolar permanent magnet. The plurality of first positioning protrusions are at least distributed on two opposite sides of the first bipolar permanent magnet, and the plurality of second positioning protrusions are at least distributed on two opposite sides of the second bipolar permanent magnet.

[0012] In a preferred embodiment, the inner wall of the frame-shaped part is provided with a first anti-misalignment protrusion and a second anti-misalignment protrusion. The first anti-misalignment protrusion cooperates with a first anti-misalignment notch provided on the first bipolar permanent magnet, and the second anti-misalignment protrusion cooperates with a second anti-misalignment notch provided on the second bipolar permanent magnet.

[0013] In a preferred embodiment, the yoke component includes two first yokes and two second yokes. The two first yokes correspond to two opposite sides of the frame-shaped part in the movement direction of the coil driving component and are symmetric to each other. The two second yokes correspond to the remaining two sides of the frame-shaped part and are symmetric to each other; the adjacent first yoke and second yoke are inserted and connected together.

[0014] The present invention further provides an electromagnetic relay, including the linear motion electromagnetic mechanism as described in the present invention above.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention uses the guiding structure made of non-plastic material to guide the linear motion of the coil driving component, so that the coil driving component can move stably in a predetermined direction in the magnetic circuit. At the same time, it avoids the wear caused by the collision between the plastic parts of the coil driving component and the metal, makes the magnetic circuit structure more stable, reduces the problem of friction chips, improves the assembly accuracy, and effectively reduces the product failure risk.

[0017] 2. The guiding structure is preferably a plurality of guiding parts and guiding recesses respectively provided for each guiding part. The guiding parts and the guiding recesses are slidably connected in a matching manner, with fewer parts and simple process, and making the linear motion of the coil driving component more stable and reliable. In particular, the guiding parts and / or the guiding recesses are made of non-magnetic materials, which can avoid changing the magnetic circuit path, affecting the magnetic field uniformity, changing the distribution of electromagnetic force, and affecting the mechanical properties, etc.

[0018] 3. The setting of the first positioning protrusions and the second positioning protrusions is beneficial to realizing the positioning of the first bipolar permanent magnet and the second bipolar permanent magnet on the yoke component, and avoiding the first bipolar permanent magnet / second bipolar permanent magnet from being unable to be fixed in the set position due to the magnetic interaction. The setting of the first anti-misalignment protrusion / second anti-misalignment protrusion, the first anti-misalignment notch / second anti-misalignment notch is beneficial to preventing the wrong installation of the polarity direction of the first bipolar permanent magnet / second bipolar permanent magnet during the assembly process.

[0019] 4. The yoke iron component includes the two first yoke irons and two second yoke irons. By the insertion method, the parallelism between the yoke iron surfaces is effectively guaranteed, which is beneficial to maintaining the stability of the force between the armature and the yoke iron.

[0020] The present invention will be further described in detail below in conjunction with the drawings and embodiments; however, a linear motion electromagnetic mechanism and an electromagnetic relay of the present invention are not limited to the embodiments. Description of the Drawings

[0021] Figure 1 is an exploded schematic view of the electromagnetic mechanism of the first embodiment of the present invention;

[0022] Figure 2 is Figure 1 a partial schematic view (the iron core is in the pulled-out state);

[0023] Figure 3 is a three-dimensional structure schematic view of the electromagnetic mechanism of the first embodiment of the present invention;

[0024] Figure 4 is the front view of the electromagnetic mechanism of the first embodiment of the present invention Figure 1 ;

[0025] Figure 5 is the front view of the electromagnetic mechanism of the first embodiment of the present invention Figure 2 (showing the partial);

[0026] Figure 6 is the right view of the electromagnetic mechanism of the first embodiment of the present invention;

[0027] Figure 7 is the top view of the electromagnetic mechanism of the first embodiment of the present invention;

[0028] Figure 8 is a three-dimensional structure schematic view of the electromagnetic mechanism of the second embodiment of the present invention;

[0029] Figure 9 is the front view of the electromagnetic mechanism of the second embodiment of the present invention;

[0030] Figure 10 is the right view of the electromagnetic mechanism of the second embodiment of the present invention;

[0031] Figure 11 is the top view of the electromagnetic mechanism of the second embodiment of the present invention;

[0032] In the figure, 1 is the yoke iron component; 11 is the first yoke iron, 111 is the jack, 112 is the guiding hole; 12 is the second yoke iron, 121 is the first positioning convex part, 122 is the second positioning convex part, 123 is the first anti-misalignment convex part, 124 is the second anti-misalignment convex part; 2 is the coil driving component, 21 is the plastic part, 211 is the relief groove, 22 is the armature, 221 is the guiding groove; 23 is the iron core, 231 is the relief groove; 3 is the first bipolar permanent magnet, 31 is the anti-misalignment notch; 4 is the second bipolar permanent magnet; 5 is the guiding rod. Detailed implementation manners

[0033] In the present invention, terms such as "first" and "second" are only used to distinguish similar objects, rather than to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description, the orientation or positional relationship indicated by "up", "down", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0034] Embodiment 1

[0035] Please refer to Figures 1-7As shown in the figure, an electromagnetic mechanism for linear motion according to the present invention includes a yoke member 1, a first bipolar permanent magnet 3, a second bipolar permanent magnet 4, and a coil driving member 2. The yoke member 1 is formed with a frame portion. The first bipolar permanent magnet 3 and the second bipolar permanent magnet 4 are respectively disposed on two opposite inner walls of the frame portion, and form two parallel magnetic fields in opposite directions. The coil driving member 2 is at least partially disposed within the frame portion and can linearly move back and forth in the distribution direction of the two parallel magnetic fields. Specifically, the coil driving member 2 includes a plastic part 21, two armatures 22, an iron core 23, and a coil (not shown in the figure). These parts are combined together by an integral insert injection molding method. The two armatures 22 are located within the frame portion and are arranged at both ends of the coil driving member 2 in its moving direction, so as to form a holding force to limit the position of the coil driving member 2 when the entire coil driving member 2 is in the operating or returning position. The present invention also includes a non-plastic material guiding structure, which is disposed between the coil driving member 2 and the yoke member 1 and guides the linear motion of the coil driving member 2, making the linear motion of the coil driving member 2 more stable and reliable, and greatly reducing the generation of plastic chips due to wear of the plastic part 21 on the coil driving member 2.

[0036] Specifically, the guiding structure includes a plurality of guiding members and guiding recesses respectively provided corresponding to each guiding member. The guiding members and / or the guiding recesses are made of non-magnetic materials, and the guiding members and / or the guiding recesses are strip-shaped and extend along the moving direction of the coil driving member 2. One of the coil driving member 2 and the yoke member 1 is provided with guiding members, and the other of the coil driving member 2 and the yoke member 1 is provided with guiding recesses. Each guiding member is respectively slidably engaged with the corresponding guiding recess along the moving direction of the coil driving member 2. The guiding members and / or the guiding recesses can be made of hard brass or stainless steel, or can be made of other non-magnetic and non-plastic materials (such as ceramics, etc.). The guiding members can be guiding rods or guiding protrusions (such as guiding ribs), and the guiding recesses include one of a guiding hole, a guiding groove, a guiding notch, and a long-strip-shaped guide rail groove.

[0037] Preferably, each guiding member is respectively fixed to the yoke member 1, and the guiding member and the yoke member 1 can be fixedly connected by one or several of fixing methods such as welding, plugging, bonding, screw or bolt connection, riveting, snap or clamping. The guiding recess includes guiding grooves 221 provided on the armature 22 and / or the iron core 23 of the coil driving member 2. The guiding member is preferably a guiding rod 5, which is made of non-magnetic material, and its cross-section can be any feasible shape such as circular, square, trapezoidal, triangular, etc. In this embodiment, the square shape is taken as an example, but it is not limited thereto; the cross-sectional shape of the guiding groove 221 is adapted to the cross-sectional shape of the guiding rod 5. Both ends of the guiding rod 5 are respectively fixed to the yoke member 1. Specifically, both ends of the guiding rod 5 are respectively fixed to both sides of the frame-shaped portion in the moving direction of the coil driving member 2: both sides of the frame-shaped portion in the moving direction of the coil driving member 2 are respectively provided with insertion holes 111 for inserting the ends of the guiding rod 5, and the guiding rod 5 and the yoke member 1 can be fixedly connected by laser welding or other fixing methods. In other embodiments, the guiding member is a guiding rib provided on the inner side surface of the yoke member.

[0038] As a preference, the guiding recess includes guiding grooves 221 provided on each armature 22 of the coil driving member 2, and the plastic part 21 and the iron core 23 on the coil driving member 2 are respectively provided with relief grooves 211 and 231 corresponding to the guiding member (i.e., the guiding rod 5). Thus, the present invention can not only set the guiding structure without increasing the size of the entire electromagnetic mechanism, but also avoid the contact between the plastic part 21, the iron core 23 and the guiding member (in this embodiment, the guiding member is the guiding rod 5), thereby avoiding the friction between the guiding member and the plastic part 21 and reducing overconstraint, so that the cooperation between the two armatures 22 and the guiding member is more stable.

[0039] In this embodiment, the guiding member (i.e., the guiding rod 5) is provided with four, and the four guiding rods 5 are distributed at the four corners. Specifically, the four guiding rods 5 are grouped in pairs, and the two groups of guiding rods 5 are respectively distributed on the opposite sides of the coil driving member 2, but the number and distribution form of the guiding rods 5 are not limited thereto.

[0040] The inner wall of the frame-shaped portion is provided with a plurality of first positioning protrusions 121 for positioning the first bipolar permanent magnet 3 and a plurality of second positioning protrusions 122 for positioning the second bipolar permanent magnet 4. The plurality of first positioning protrusions 121 are at least distributed on both sides of the first bipolar permanent magnet 3 facing away from each other, and the plurality of second positioning protrusions 122 are at least distributed on both sides of the second bipolar permanent magnet 4 facing away from each other. The first bipolar permanent magnet 3 and the second bipolar permanent magnet 4 respectively include two permanent magnets with opposite magnetic conduction directions, and the two permanent magnets are connected or arranged at intervals on the same inner wall of the frame-shaped portion, preferably arranged at intervals, so as to be beneficial to increasing the holding force at both ends of the coil driving member in its moving direction.

[0041] The inner wall of the frame portion is also provided with a first anti-misalignment convex portion 123 and a second anti-misalignment convex portion 124. The first anti-misalignment convex portion 123 cooperates with a first anti-misalignment notch 31 provided on the first bipolar permanent magnet 3, and the second anti-misalignment convex portion 124 cooperates with a second anti-misalignment notch (not shown in the figure) provided on the second bipolar permanent magnet 4. In this way, it is possible to prevent the misalignment of the polarities of the first bipolar permanent magnet 3 / the second bipolar permanent magnet 4 during the assembly process. The first anti-misalignment convex portion 123 and the second anti-misalignment convex portion 124 are preferably circular convex buds, and the first anti-misalignment notch 31 and the second anti-misalignment notch are semi-circular notches.

[0042] The above-mentioned first positioning convex portion 121, second positioning convex portion 122, first anti-misalignment convex portion 123, and second anti-misalignment convex portion 124 are respectively formed by stamping the corresponding parts of the frame portion from the outside to the inside, but are not limited thereto.

[0043] In this embodiment, the yoke member 1 includes two first yokes 11 and two second yokes 12. The two first yokes 11 correspond to the two opposite sides of the frame portion in the movement direction of the coil driving member 2 and are symmetric to each other. The two second yokes 12 correspond to the remaining two sides of the frame portion and are symmetric to each other. The adjacent first yoke 11 and second yoke 12 are inserted and connected together. By the insertion method, the parallelism between the yoke surfaces is effectively guaranteed, which is beneficial to maintaining the force stability between the armature 22 and the yoke member 1. The first yoke 11 and the second yoke 12 can be stably fixed by welding or riveting. The two first yokes 11 are respectively provided with the jacks 111 corresponding to the two ends of the guide rod 5, and the first bipolar permanent magnet 3 and the second bipolar permanent magnet 4 are respectively arranged on the opposite inner side surfaces of the two second yokes 12. Therefore, the first positioning convex portion 121 / second positioning convex portion 122, first anti-misalignment convex portion 123 / second anti-misalignment convex portion 124 are provided on the second yoke 12.

[0044] A linear motion electromagnetic mechanism of the present invention uses a non-magnetic metal guide (in this embodiment, the guide is a guide rod 5) as the sliding track of the coil driving member 2, so that the energized coil is subjected to the Ampere force in the bipolar magnetic field to drive the coil driving member 2 to move stably along the established direction within the frame portion, greatly improving the motion accuracy of the coil driving member 2. At the same time, the wear of the plastic part 21 of the coil driving member 2 is avoided, the generation of plastic chips is greatly reduced, the magnetic circuit structure is made more stable, the problem of friction and chip hanging is reduced, and the product failure risk is effectively reduced.

[0045] Embodiment Two

[0046] Please refer to Figures 8-11As shown, a linear motion electromagnetic mechanism of the present invention is different from the above-mentioned embodiment 1 in that: the guide member is fixed to the coil driving component 2, and the guide member and the coil driving component 2 can be fixedly connected by one or more of the fixing methods such as welding, plugging, bonding, screw or bolt connection, riveting, insert injection molding, snap or clamping. The two ends of the guide member protrude out of the two sides of the coil driving component 2 in the direction of movement; the guide recess includes guide holes 112 respectively arranged on the yoke component 1 corresponding to the two ends of the guide member, and the two ends of the guide member are movably inserted into the corresponding guide holes 112. In other embodiments, the guide recess includes guide grooves respectively arranged on the inner wall of the yoke component corresponding to each guide member. At this time, the two ends of the guide member may not protrude out of the two sides of the coil driving component in the direction of movement.

[0047] In this embodiment, the guide member is also a guide rod 5, but it is not limited to this. The guide rod 5 is integrally insert-molded with the coil driving component 2, or the guide rod 5 is inserted and fixed to the coil driving component 2. There are two guide rods 5, and the two guide rods 5 are distributed up and down, but the number and distribution form of the guide rods 5 are not limited to this. The two first yokes 11 of the yoke component 1 are respectively provided with the guide holes 112 corresponding to the guide rods 5. In this embodiment, the cross section of the guide rod 5 is circular, but it is not limited to this.

[0048] In the electromagnetic mechanism for linear motion of the present invention, when the energized coil is subjected to the Ampere force in the bipolar magnetic field to drive the coil driving component 2 to move linearly in the frame-shaped portion, each guide rod 5 also moves along with it and slidably cooperates with the corresponding guide hole 112 to guide the linear motion of the entire coil driving component 2, so that the coil driving component 2 can achieve stable motion and avoid wear of the plastic part 21.

[0049] An electromagnetic relay of the present invention comprises the electromagnetic mechanism for linear motion described in any of the above embodiments. The present invention also comprises a base, a moving contact assembly and a stationary contact assembly, wherein the electromagnetic mechanism and the stationary contact assembly are arranged on the base, and the moving contact assembly is linked with the coil driving component 2 of the electromagnetic mechanism so as to be driven by the coil driving component 2 to perform linear reciprocating motion, thereby contacting or separating with the stationary contact assembly.

[0050] The electromagnetic mechanism and electromagnetic relay for linear motion of the present invention, the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.

[0051] The above embodiments are only used to further illustrate a linear motion electromagnetic mechanism and an electromagnetic relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic mechanism for linear motion, comprising a yoke component, a first dipole permanent magnet, a second dipole permanent magnet, and a coil driving component, wherein the yoke component is formed with a frame-shaped portion, the first dipole permanent magnet and the second dipole permanent magnet are respectively arranged on two opposite inner walls of the frame-shaped portion, and form two parallel magnetic fields in opposite directions; the coil driving component is at least partially arranged in the frame-shaped portion, and can linearly move back and forth in the distribution direction of the two parallel magnetic fields; characterized in that: A guide structure made of non-plastic material is arranged between the coil driving component and the yoke component, and the guide structure guides the linear motion of the coil driving component.

2. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The guide structure includes a plurality of guide members and guide recesses respectively arranged corresponding to each guide member, the guide members and / or guide recesses are made of non-magnetic material, and are in the shape of long strips and extend along the movement direction of the coil driving component; one of the coil driving component and the yoke component is provided with the guide member, and the other of the coil driving component and the yoke component is provided with the guide recess; each guide member is respectively adapted and slidably connected with the corresponding guide recess along the movement direction of the coil driving component.

3. The electromagnetic mechanism for linear motion according to claim 2, characterized in that: The guide member is fixed to the yoke component, and the guide recess comprises a guide groove arranged on the armature and / or the iron core of the coil driving component.

4. The electromagnetic mechanism for linear motion according to claim 3, characterized in that: The guide member is a guide rod, and two ends of the guide rod are respectively fixed to two sides of the frame-shaped portion in the moving direction of the coil driving component.

5. The electromagnetic mechanism for linear motion according to claim 3 or 4, characterized in that: The guide recess comprises a guide groove arranged on each armature of the coil driving component, and the plastic part and the iron core on the coil driving component are respectively provided with a clearance groove corresponding to the guide part.

6. The electromagnetic mechanism for linear motion according to claim 2, characterized in that: The guide member is fixed to the coil driving component; the two ends of the guide member protrude out of the two sides of the coil driving component in the movement direction respectively, and the guide recess includes guide holes respectively arranged on the yoke component corresponding to the two ends of the guide member, and the two ends of the guide member are respectively movably inserted into the corresponding guide holes, or the guide recess includes guide grooves respectively arranged on the inner wall of the yoke component corresponding to each guide member.

7. The electromagnetic mechanism for linear motion according to claim 6, characterized in that: The guide member is a guide rod, and the guide rod is integrally insert-molded with the coil driving component, or the guide rod is inserted and fixed to the coil driving component.

8. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The inner wall of the frame-shaped portion is provided with a plurality of first positioning protrusions for positioning the first dipole permanent magnet and a plurality of second positioning protrusions for positioning the second dipole permanent magnet. The plurality of first positioning protrusions are distributed at least on two sides of the first dipole permanent magnet facing away from each other, and the plurality of second positioning protrusions are distributed at least on two sides of the second dipole permanent magnet facing away from each other.

9. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The inner wall of the frame-shaped portion is provided with a first anti-error convex portion and a second anti-error convex portion, the first anti-error convex portion cooperates with a first anti-error notch provided on the first bipolar permanent magnet, and the second anti-error convex portion cooperates with a second anti-error notch provided on the second bipolar permanent magnet.

10. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The yoke component includes two first yokes and two second yokes. The two first yokes correspond to the two opposite sides of the frame-shaped part in the movement direction of the coil driving component and are symmetrical to each other. The two second yokes correspond to the other two sides of the frame-shaped part and are symmetrical to each other. The adjacent first yokes and second yokes are plugged together.

11. An electromagnetic relay, characterized in that: An electromagnetic mechanism for linear motion comprising the electromagnetic mechanism as claimed in any one of claims 1 to 10.

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