A small magnetic latching relay

Abstract

The application discloses a small-sized magnetic latching relay, which comprises a base, a contact part, a magnetic circuit part, an armature part, a push card and an auxiliary contact part installed on the base, the armature part is rotationally connected to the base and located between the magnetic circuit part and the contact part, the armature part is matched with the magnetic circuit part, and the armature part is matched with driving spring blades of the contact part and auxiliary driving spring blades of the auxiliary contact part through the push card, the auxiliary contact part is located on the side of the armature part, the armature part is arranged to be biased away from the auxiliary contact part relative to the magnetic circuit part, and the side of the armature part close to the auxiliary contact part is arranged to leave installation space of the auxiliary contact part on the base. On the basis of miniaturization of the product, the auxiliary contact part has sufficient installation space, and the problem of insufficient insulation distance between the magnetic circuit part and the auxiliary contact part is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of relays, in particular to a small-sized magnetic latching relay. BACKGROUND

[0002] The magnetic latching relay is a new type of relay developed in recent years, which is also an automatic switch. Like other electromagnetic relays, the magnetic latching relay plays a role in automatically connecting and disconnecting the circuit. The difference is that the normally closed or normally open state of the magnetic latching relay completely depends on the action of the permanent magnet, and the switching state of the magnetic latching relay is triggered by a pulse electrical signal of a certain width to complete the switching state of the magnetic latching relay. The opening and closing states of the contacts are maintained by the magnetic force generated by the permanent magnet. When the contacts of the relay need to be open or closed, only a positive (negative) direct current pulse voltage is needed to excite the coil, and the relay completes the switching state of the opening and closing in an instant. When the contacts are in the holding state, the coil does not need to be continuously energized, and the magnetic force of the permanent magnet can maintain the state of the relay unchanged.

[0003] In order to monitor the contact state of the main contact of the product, an auxiliary contact part is provided in a magnetic latching relay in the prior art, and the auxiliary contact part is located beside the armature part. The armature part cooperates with the main movable spring of the contact part and the auxiliary movable spring of the auxiliary contact part by means of a push card. In order to further compress the product space and realize the miniaturization of the product, a magnetic latching relay is provided with a recess in the armature part to avoid the auxiliary contact part, so that the product has sufficient space to install the auxiliary contact part on the basis of miniaturization. However, this method may result in insufficient insulation distance between the magnetic circuit part and the auxiliary contact part, and the recess provided on the armature part may damage the integrity of the armature part and increase the processing difficulty of the armature part. SUMMARY

[0004] The present application provides a small-sized magnetic latching relay, which solves the problem of installation space of the auxiliary contact part on the basis of miniaturization by adopting a biased arrangement of the armature part.

[0005] The technical scheme adopted by the present application to solve the technical problem is as follows: a small-sized magnetic latching relay, comprising a base, a contact part, a magnetic circuit part, an armature part, a push card and an auxiliary contact part installed on the base, the armature part being rotationally connected to the base and located between the magnetic circuit part and the contact part, the armature part cooperating with the magnetic circuit part and cooperating with the main movable spring of the contact part and the auxiliary movable spring of the auxiliary contact part through the push card, and the auxiliary contact part being located beside the armature part; the armature part is biased to the side away from the auxiliary contact part relative to the magnetic circuit part, so that the installation space of the auxiliary contact part is left on the base on the side of the armature part close to the auxiliary contact part.

[0006] Further, the two yoke irons of the magnetic circuit part protrude to the side away from the auxiliary contact part at the part where they are fitted to the armature part, and the two yoke irons are recessed at the side close to the auxiliary contact part.

[0007] Further, the armature part is pivotally connected to the base by a pivot shaft, and the pivot shaft is eccentrically arranged at the side of the armature part close to the contact part.

[0008] Further, the base is provided with a barrier wall between the armature part and the contact part, and the barrier wall and the peripheral wall of the base enclose a first space for mounting the magnetic circuit part and the armature part and a second space for mounting the contact part, and the base is provided with a third space for mounting the auxiliary contact part at the side of the first space; the bottom of the barrier wall is suspended or provided with a clearance opening to avoid the push card.

[0009] Further, the push card is provided with a first slot and a second slot, the part of the armature part fitted to the push card is inserted into the first slot, and the bottom of the main spring leaf is inserted into the second slot; the push card is provided with a push part for cooperating with the auxiliary spring leaf, and the push part and the auxiliary spring leaf are in line surface contact in the contact state.

[0010] Further, the pivot shaft of the armature part is eccentrically arranged at the side of the armature part close to the contact part.

[0011] Further, it also includes a bottom-opened shell, the bottom of the shell is connected to the base and contains the contact part, the magnetic circuit part, the armature part and the auxiliary contact part; and a magnetic steel part, the shell is provided with a first barrier wall, which and the side wall of the shell enclose an upward-opening upper slot, the base is provided with a second barrier wall, which encloses a lower slot, or the second barrier wall and the peripheral wall of the base enclose a lower slot; the upper end of the magnetic steel part is inserted into the upper slot, the lower end of the magnetic steel part is inserted into the lower slot, and the magnetic steel part is located at the side of the contact part.

[0012] Further, the bottom of the first barrier wall and the top of the second barrier wall are staggered.

[0013] Further, the bottom of the first barrier wall is inserted into the lower slot; the inner side of the second barrier wall is provided with an upward-facing first step surface, the bottom end of the first barrier wall is in contact with or clearance-fitted with the first step surface; the outer side of the first barrier wall is provided with a downward-facing second step surface, and the top end of the second barrier wall is in contact with, flush with or clearance-fitted with the second step surface.

[0014] Further, the main static spring leaf of the contact part is wrapped by the positioning part arranged on the base, and only one side of the main static spring leaf facing the main dynamic spring leaf is exposed.

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

[0016] 1. Since the armature part is arranged to be biased away from the auxiliary contact part, the installation space of the auxiliary contact part is left on the base, so that the auxiliary contact part has sufficient installation space, and the problem of insufficient insulation distance between the magnetic circuit part and the auxiliary contact part is effectively solved. In particular, the armature part does not need to be provided with a slot for the auxiliary contact part, so that the integrity of the armature part is not damaged, and the processing difficulty of the armature part is not increased.

[0017] 2. The two yoke irons of the magnetic circuit part are respectively protruded away from the auxiliary contact part at the parts matched with the armature part, so that the two yoke irons are effectively matched with the biased armature part, and the magnetic conduction efficiency is ensured.

[0018] 3. The part of the armature part matched with the push card is not arranged to be biased relative to the magnetic circuit part, so that the force point and the stress point on the push card can be kept on the central axis, so that the push card will not be deviated during movement.

[0019] 4. The base is provided with a retaining wall between the armature part and the contact part, which can not only improve the creepage distance and air gap of the magnetic circuit part, the armature part and the contact part, but also improve the problem that the base of the prior art is provided with a single frame structure to install the magnetic circuit part, the armature part and the contact part, which is easy to be deformed at the middle position, so as to strengthen the structure strength of the base and improve the positioning stability of the interference fit.

[0020] 5. The pushing part of the push card is in line-face contact with the auxiliary dynamic spring leaf in the contact state, which can reduce the risk of scratching and damage between the pushing part and the auxiliary dynamic spring leaf.

[0021] 6. The rotating shaft of the armature part is arranged to be eccentric to the side of the armature part close to the contact part, which can further avoid the auxiliary contact part.

[0022] 7、the first barrier wall bottom and the second barrier wall top staggered cooperation makes the product in the use process after heating, even if the cooperation gap of the base and the shell increases, the application still can use the first barrier wall and the second barrier wall partial staggered cooperation state to separate the magnetic steel part and the contact part completely, thereby reducing the heat of the contact part to cause the heat decay of the magnetic steel part, and realizing the promotion of the air gap and the creepage distance between the contact part and the magnetic steel part, and reducing the sensitivity of the protection structure of the magnetic steel part to temperature impact. In particular, the application adopts the staggered cooperation mode of the first barrier wall bottom and the second barrier wall top to realize the promotion of the insulation protection performance of the magnetic steel part, without setting additional parts, and the overall structure is simple and easy to process.

[0023] 8、the main static spring sheet of the contact part is wrapped by the positioning part arranged on the base, which can increase the creepage distance between the main static spring sheet and the magnetic steel part.

[0024] 9、the armature part is arranged offset to the magnetic circuit part, the suction force received by the armature part is offset to the pushing force of the push card, but since the armature part is stably limited on the base by the rotating shaft, the armature part will not be skewed in the pushing process, thereby ensuring the normal and stable action of the armature part.

[0025] The application will be further described in detail in combination with the drawings and examples; but the small-sized magnetic latching relay of the application is not limited to the examples. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the perspective view of the application (without the shell and the magnetic steel part);

[0027] Figure 2 is the perspective view of the magnetic circuit part and the armature part in the combined state;

[0028] Figure 3 is Figure 2 the right view of

[0029] Figure 4 is the perspective view of the base of the application (including the main static spring sheet);

[0030] Figure 5 is the top view of the base of the application;

[0031] Figure 6 is the sectional view of the base of the application;

[0032] Figure 7 is the cooperation view of the auxiliary dynamic spring sheet and the push card of the application;

[0033] Figure 8 is the sectional view of the applicationFigure 1 ;

[0034] Figure 9 is a sectional view of the present application Figure 2 ;

[0035] Figure 10 is a sectional view of the present application Figure 3 (not including the shell);

[0036] Figure 11 is a perspective view of the shell and the magnetic steel part of the present application in an exploded state;

[0037] Figure 12 is a perspective view of the shell and the magnetic steel part of the present application in an assembled state;

[0038] Figure 13 is a perspective view of the base and the magnetic steel part of the present application in an assembled state;

[0039] Figure 14 is a sectional view of the base, the shell and the magnetic steel part of the present application in an assembled state;

[0040] Figure 15 is an enlarged view of part A in Figure 14 ;

[0041] wherein 1, shell, 11, first barrier wall, 111, second step surface, 12, upper slot, 2, base, 21, barrier wall, 22, first space, 23, second space, 24, third space, 25, second barrier wall, 251, first step surface, 26, lower slot, 27, positioning part, 3, magnetic circuit part, 31, coil holder, 32, yoke, 33, coil, 34, core, 4, armature part, 41, armature, 42, permanent magnet, 43, plastic part, 431, push block, 44, rotating shaft, 5, contact part, 51, main lead-out piece, 52, main active spring piece, 53, main inactive spring piece, 6, auxiliary contact part, 61, auxiliary lead-out piece, 62, auxiliary active spring piece, 63, auxiliary inactive spring piece, 7, push-on card, 71, first slot, 72, second slot, 73, pushing part, 74, accommodation gap, 8, magnetic steel part, 81, arc-blowing magnetic steel, 82, magnetic isolation piece, 821, folded edge. DETAILED DESCRIPTION

[0042] In the present application, the terms "first", "second", "third" and the like are used only to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description, the orientation or position relationship indicated by "up", "down", "left", "right", "front" and "back" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In addition, in the description of the present application, the association relationship between the associated objects is described by "and / or", which means that there can be three kinds of relationships, for example, A and / or B can represent three cases: A exists alone, A and B exist together, and B exists alone.

[0044] Please refer to Figures 1-15 As shown in the drawings, the small magnetic latching relay of the present application comprises a bottom-opened shell 1, a base 2, and a contact part 5, a magnetic circuit part 3, an armature part 4, a push card 7 and an auxiliary contact part 6 installed on the base 2, the bottom of the shell 1 is connected with the base 2 and contains the contact part 5, the magnetic circuit part 3, the armature part 4 and the auxiliary contact part 6. The magnetic circuit part 3 comprises a coil holder 31, a coil 33 wound on the coil holder 31, an iron core 34 and two yokes 32 penetrating the coil holder 31, the two yokes 32 are respectively in the shape of L, and one side of each yoke 32 is riveted and fixed with two ends of the iron core 34, and the other side of each yoke 32 is located on the same side outside the coil holder 31 and is arranged oppositely. The contact part 5 comprises a main lead-out piece 51, a main active spring piece 52 and a main static spring piece 53, the main lead-out piece 51 and the static spring piece are respectively inserted into the base 2, the upper end of the main active spring piece 52 is riveted and fixed with the main lead-out piece 51, and the lower end of the main active spring piece 52 is provided with a main active contact which is correspondingly matched with a main static contact provided on the main static spring piece 53. The auxiliary contact part 6 comprises an auxiliary lead-out piece 61, an auxiliary active spring piece 62 and an auxiliary static spring piece 63, the auxiliary lead-out piece 61 and the auxiliary static spring piece 63 are respectively inserted into the base 2, the upper end of the auxiliary active spring piece 62 is riveted and fixed with the upper end of the auxiliary lead-out piece 61, and the lower end of the auxiliary active spring piece 62 is provided with an auxiliary active contact which is correspondingly matched with an auxiliary static contact provided on the auxiliary static spring piece 63.

[0045] In the embodiment, the armature part 4 is rotatably connected to the base 2 by a rotating shaft 44 and is located between the magnetic circuit part 3 and the contact part 5. The armature part 4 cooperates with the two yokes 32 of the magnetic circuit part 3 and cooperates with the main spring 52 of the contact part 5 and the auxiliary spring 62 of the auxiliary contact part 6 through the push card 7 which is slidably arranged on the base 2. The auxiliary contact part 6 is located beside the armature part 4. The armature part 4 is arranged to be biased away from the auxiliary contact part 6 relative to the magnetic circuit part 3. The side of the armature part 4 close to the auxiliary contact part 6 leaves a mounting space for the auxiliary contact part 6 on the base 2. Thus, the auxiliary contact part 6 has sufficient mounting space on the basis of the miniaturization of the product, and the problem of insufficient insulation distance between the magnetic circuit part 3 and the auxiliary contact part 6 is effectively solved. In addition, the armature part 4 does not need to be provided with a slot for the auxiliary contact part 6, so the integrity of the armature part 4 is not damaged, and the processing difficulty of the armature part 4 is not increased. The armature part 4 is arranged to be biased away from the auxiliary contact part 6 relative to the magnetic circuit part 3. The center line L1 of the magnetic circuit part 3 in the axial direction and the center line L2 of the armature part 4 in the axial direction of the magnetic circuit part are staggered relative to each other in the arrangement direction of the magnetic circuit part 3 and the armature part 4 (also the length direction of the base 1), as shown in Figure 3 .

[0046] In the embodiment, as shown in Figure 2 , Figure 3 , the parts of the two yokes 32 of the magnetic circuit part 3 which cooperate with the armature part 4 protrude away from the auxiliary contact part 6, and the parts of the two yokes 32 close to the auxiliary contact part 6 are recessed. In this way, the two yokes 32 can effectively cooperate with the armature part 4 which is arranged to be biased, so that the magnetic conductivity efficiency is maintained, and the auxiliary contact part 6 is avoided.

[0047] In the embodiment, the part of the armature part 4 which cooperates with the push card 7 is not arranged to be biased relative to the magnetic circuit part 3. The magnetic circuit part 3 and the contact part 5 are arranged along the length direction of the base 2, and the magnetic circuit part 3 and the contact part 5 are centrally arranged in the width direction of the base 2. The part of the armature part 4 which cooperates with the push card 7 is not arranged to be biased relative to the magnetic circuit part 3. Therefore, the part of the armature part 4 which cooperates with the push card 7 is also centrally arranged in the width direction of the base 2. In this way, the pushing force of the armature part 4 on the push card 7 is located on the center line of the base 2 in the length direction, so that the main spring 52 of the contact part 5 can be better pushed.

[0048] In the embodiment, as shown inFigures 4-6 As shown, the base 2 is provided with a baffle 21 located between the armature portion 4 and the contact portion 5. The baffle 21 and the four peripheral walls of the base 2 form a first space 22 for installing the magnetic circuit portion 3 and the armature portion 4, and a second space 23 for installing the contact portion 5. The base 2 is provided with a third space 24 on the side of the first space 22 for installing the auxiliary contact portion 6. The bottom of the baffle 21 is suspended or has a clearance opening to avoid the push card 7. The baffle 21 not only improves the creepage distance and air gap between the magnetic circuit portion 3, the armature portion 4 and the contact portion 5, but also improves the problem of easy deformation in the middle position caused by the use of a single frame structure to install the magnetic circuit portion, armature portion and contact portion in the existing technology. This strengthens the structural strength of the base 2 and improves the positioning stability of the insertion interference.

[0049] In this embodiment, as Figure 7 As shown, the push card 7 has a first slot 71 and a second slot 72. The part of the armature portion 4 that mates with the push card 7 is inserted into the first slot 71, and the bottom of the active spring 52 is inserted into the second slot 72. Figure 8 As shown. The pusher 7 is provided with a push portion 73 for cooperating with the auxiliary movable spring 62. The push portion 73 and the auxiliary movable spring 62 are in line-surface contact in the contact state, thereby reducing the risk of scratch damage between the push portion 73 and the auxiliary movable spring 62. Specifically, the push portion 73 is cylindrical, but not limited to this. The bottom of the auxiliary movable spring 62 is provided with an extension piece 621 that extends laterally and is used to cooperate with the push portion 73. The pusher 7 is provided with a clearance notch 74 near the auxiliary stationary spring 63 to avoid the auxiliary stationary spring 63.

[0050] In this embodiment, the pivot 44 of the armature portion 4 is eccentrically positioned towards the side of the armature portion 4 closest to the contact portion 5. The armature portion 4 specifically includes two armatures 41, a permanent magnet 42, a plastic component 43, and the pivot 44. The permanent magnet 42 is stacked between the two armatures 41 and secured by the plastic component 43. The pivot 44 is horizontally mounted on the plastic component 43. The lengths of the two armatures 41 are inconsistent, with the armature closer to the magnetic circuit portion 3 being shorter and the armature farther from the magnetic circuit portion 3 being longer. The armature portion 4 is approximately H-shaped, with the other sides of the two yokes 32 of the magnetic circuit portion 3 inserted into the upper and lower openings formed by the H-shape of the armature portion 4. The part of the armature portion 4 that cooperates with the pusher 7 is specifically a pusher block 431 located at the bottom of the plastic component 43.

[0051] In this embodiment, as Figures 11-15As shown, the application further comprises a magnetic steel part 8, the housing 1 is provided with a first barrier wall 11, the first barrier wall 11 and the side wall of the housing 1 enclose an upper insertion slot 12 with the opening facing downward, the base 2 is provided with a second barrier wall 25, the second barrier wall 25 encloses a lower insertion slot 26, or the second barrier wall 25 and the side wall of the base 2 enclose the lower insertion slot 26; the upper end of the magnetic steel part 8 is inserted into the upper insertion slot 12, the lower end of the magnetic steel part 8 is inserted into the lower insertion slot 26, and the magnetic steel part 8 is located beside the contact part 5. The bottom of the housing 1 encloses the base 2, one side of the lower insertion slot 26 facing the side wall of the housing 1 is open, but it is not limited to this, in other embodiments, one side of the lower insertion slot 26 facing the side wall of the housing 1 is closed.

[0052] As shown in the embodiment, Figure 14 , Figure 15 The bottom of the first barrier wall 11 and the top of the second barrier wall 25 are staggered and matched, and are gap matched or non-gap matched. Specifically, the bottom of the first barrier wall 11 is inserted into the lower insertion slot 26. The inner side of the second barrier wall 25 is provided with an upward first step surface 251, and the bottom end of the first barrier wall 11 is in contact with or gap matched with the first step surface 251. The provision of the first step surface 251 can provide support for the first barrier wall 11 and improve the stability of the structure. At the same time, the provision of the first step surface 251 reduces the thickness of the top of the second barrier wall 25, so that there is extra space inside the lower insertion slot 26 to accommodate the bottom of the first barrier wall 11. The outer side of the first barrier wall 11 is provided with a downward second step surface 111, and the top end of the second barrier wall 25 is in contact with or flush with or gap matched with the second step surface 111. The provision of the second step surface 111 reduces the thickness of the bottom of the second barrier wall 25, so that the bottom of the second barrier wall 25 occupies less space.

[0053] In the embodiment, the upper end of the magnetic steel part 8 is in interference fit with the upper slot 12, and the lower end of the magnetic steel part 8 is in interference fit with the lower slot 26, so that the magnetic steel part 8 can be better positioned in the upper slot 12 and the lower slot 26, and the shaking of the magnetic steel part 8 is avoided. The magnetic steel part 8 specifically includes the arc-blowing magnetic steel 81 and the magnetic shunt 82 in the form of a sheet, the arc-blowing magnetic steel 81 and the magnetic shunt 82 are stacked together, and the magnetic shunt 82 is arranged on the outer side, and the arc-blowing magnetic steel 81 is arranged on the inner side. The thickness of the magnetic shunt 82 is smaller than the thickness of the arc-blowing magnetic steel 81, the two edges of the width of the magnetic shunt 82 are respectively provided with the folded edges 821, and the folded edges 821 of the two edges of the width of the magnetic shunt 82 respectively cover the two edges of the width of the arc-blowing magnetic steel 813. The number of the magnetic steel part 8, the first barrier wall 11 and the second barrier wall 25 is two respectively, and the first barrier wall 11 and the second barrier wall 25 correspond to the magnetic steel part 8 one by one respectively, the contact part 5 is located between the two magnetic steel parts 8, and the arrangement direction of the two magnetic steel parts 8 is perpendicular to the contact breaking direction of the contact part 5, specifically, the two magnetic steel parts 8 are arranged along the width direction of the base 2. In other embodiments, the magnetic steel part only includes the arc-blowing magnetic steel.

[0054] In the embodiment, the main static spring sheet 53 of the contact part 5 is wrapped by the positioning part 27 arranged on the base 2 in multiple surfaces, and only the surface of the main static spring sheet 53 facing the main driving spring sheet 52 is exposed, as shown in Figure 4 、 Figure 8 、 Figure 9 indicated. In this way, the creepage distance between the main static spring sheet 53 and the magnetic steel part 8 can be increased. When installed, the main static spring sheet 53 is riveted with the main static contact, and then is inserted into the base 2 from bottom to top, and the magnetic circuit part 3 and the main leading sheet 51 are respectively inserted into the base 2 from top to bottom. The auxiliary driving spring sheet 62 and the auxiliary static spring sheet 63 are respectively inserted into the third space 24 formed by the base 2 laterally.

[0055] The small-sized magnetic latching relay of the application is provided with the armature part 4 which is arranged to be biased away from the auxiliary contact part 6 relative to the magnetic circuit part 3, so that the side of the armature part 4 close to the contact part leaves the installation space of the auxiliary contact part 6 on the base 2, and thus, the auxiliary contact part 6 has sufficient installation space on the basis of the small-sized product, and the problem of insufficient insulation distance between the magnetic circuit part 3 and the auxiliary contact part 6 is effectively solved. In addition, the armature part 4 does not need to be provided with the accommodation slot of the auxiliary contact part 6, and the integrity of the armature part 4 is not damaged, and the processing difficulty of the armature part 4 is not increased. Although the armature part 4 is arranged to be biased relative to the magnetic circuit part 3, the suction force of the armature part 4 and the pushing force of the armature part 4 to the pushing card 7 are staggered, but since the armature part 4 is stably positioned on the base 2 by the rotating shaft 44, the armature part 4 will not be skewed during the pushing process.

[0056] The first barrier wall 11 and the second barrier wall 25 of the small-sized magnetic latching relay according to the present application are partially staggered to completely separate the blow arc magnetic steel 813 from the contact part 5, and even if the gap between the base 2 and the shell 1 increases due to heat generated during use, the first barrier wall 11 and the second barrier wall 25 still maintain the partially staggered state, so that the blow arc magnetic steel 813 and the contact part 5 are completely separated, thereby reducing the heat decay of the blow arc magnetic steel 813 caused by the heat of the contact part 5, and improving the air gap and creepage distance between the contact part 5 and the blow arc magnetic steel 813, so as to avoid the problem that the contact part 5 is easily conducted through the blow arc magnetic steel 813 in the breaking state due to the too small creepage distance between the contact part 5 and the magnetic steel. The present application also reduces the sensitivity of the protection structure (i.e. the shell 11 and the first barrier wall 11 thereof, and the base 22 and the second barrier wall 25 thereof) of the blow arc magnetic steel 813 to temperature impact. In particular, the present application uses the staggered arrangement of the bottom of the first barrier wall 11 and the top of the second barrier wall 25 to improve the insulation and protection performance of the blow arc magnetic steel 813, without the need for additional parts, and the overall structure is simple and easy to process and form.

[0057] The small-sized magnetic latching relay according to the present application is further miniaturized by optimizing the structure, while ensuring the assembly operability, ensuring the contact gap monitoring, overstroke monitoring, and contact pressure monitoring positions, so that the process parameters of the product can be monitored. At the same time, the product miniaturization requirement is met, the product assembly is improved, the risk of foreign matter generation during assembly is reduced, the product reliability is further improved, and the electrical service life of the magnetic latching relay is effectively ensured.

[0058] The small-sized magnetic latching relay according to the present application is further miniaturized by optimizing the structure, while ensuring the assembly operability, ensuring the contact gap monitoring, overstroke monitoring, and contact pressure monitoring positions, so that the process parameters of the product can be monitored. At the same time, the product miniaturization requirement is met, the product assembly is improved, the risk of foreign matter generation during assembly is reduced, the product reliability is further improved, and the electrical service life of the magnetic latching relay is effectively ensured.

[0059] The above embodiments are only used to further illustrate the small-sized magnetic latching relay according to the present application, but the present application is not limited to the embodiments, and any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments all fall within the protection scope of the technical solution of the present application.

Claims

1. A miniature magnetic latching relay, comprising a base, and a contact portion, a magnetic circuit portion, an armature portion, a pusher, and an auxiliary contact portion mounted on the base, wherein the armature portion is rotatably connected to the base and located between the magnetic circuit portion and the contact portion, and the armature portion cooperates with the magnetic circuit portion, and cooperates with the active spring of the contact portion and the auxiliary moving spring of the auxiliary contact portion via the pusher, the auxiliary contact portion being located beside the armature portion; characterized in that: The armature portion is offset relative to the magnetic circuit portion towards the side away from the auxiliary contact portion, so that the side of the armature portion closer to the auxiliary contact portion provides installation space for the auxiliary contact portion on the base.

2. The miniature magnetic latching relay according to claim 1, characterized in that: The two yokes of the magnetic circuit portion bulge outwards from the side away from the auxiliary contact portion at the parts that mate with the armature portion, while the two yokes retract inwards from the side closer to the auxiliary contact portion.

3. The miniature magnetic latching relay according to claim 1, characterized in that: The armature portion that mates with the push card is not offset relative to the magnetic circuit portion.

4. The miniature magnetic latching relay according to claim 1, characterized in that: The base is provided with a baffle wall located between the armature part and the contact part. The baffle wall and the four peripheral walls of the base form a first space for installing the magnetic circuit part and the armature part and a second space for installing the contact part. The base is provided with a third space for installing the auxiliary contact part on the side of the first space. The bottom of the baffle wall is suspended or has a clearance opening to avoid the push card.

5. The miniature magnetic latching relay according to claim 1, characterized in that: The push card has a first slot and a second slot. The armature part that mates with the push card is inserted into the first slot, and the bottom of the active spring is inserted into the second slot. The push card has a push part for mates with the auxiliary moving spring. The push part and the auxiliary moving spring are in line-surface contact when in contact.

6. The miniature magnetic latching relay according to claim 1, characterized in that: The armature is rotatably connected to the base by a rotating shaft, which is eccentrically positioned toward the side of the armature closer to the contact portion.

7. The miniature magnetic latching relay according to claim 1, characterized in that: It also includes a housing with an opening at the bottom, the bottom of which is connected to the base and encloses the contact portion, magnetic circuit portion, armature portion, and auxiliary contact portion; it also includes a magnet portion, the housing has a first baffle wall inside, which together with the side wall of the housing forms an upper slot with the opening facing downward, the base has a second baffle wall, which together forms a lower slot, or the second baffle wall together with the side wall of the base forms a lower slot; the upper end of the magnet portion is inserted into the upper slot, the lower end of the magnet portion is inserted into the lower slot, and the magnet portion is located beside the contact portion.

8. The miniature magnetic latching relay according to claim 7, characterized in that: The bottom of the first baffle and the top of the second baffle are staggered.

9. The miniature magnetic latching relay according to claim 8, characterized in that: The bottom of the first baffle is inserted into the lower slot; the inner side of the second baffle is provided with an upward-facing first step surface, and the bottom end of the first baffle is in contact with or in clearance fit with the first step surface; the outer side of the first baffle is provided with a downward-facing second step surface, and the top end of the second baffle is in contact with, flush with, or in clearance fit with the second step surface.

10. The miniature magnetic latching relay according to claim 7, characterized in that: The main stationary spring sheet of the contact portion is multi-sidedly wrapped by the positioning part provided on the base, and only the side of the main stationary spring sheet facing the active spring sheet is exposed.

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