CN115714077A - Small magnetic latching relay - Google Patents

Abstract

The invention discloses a small-sized magnetic latching relay, which comprises a base, and a contact part, a magnetic circuit part, an armature part, a push card and an auxiliary contact part which are arranged on the base, wherein the armature part is rotationally connected to the base and positioned between the magnetic circuit part and the contact part, the armature part is matched with the magnetic circuit part and matched with a driving reed of the contact part and an auxiliary moving reed of the auxiliary contact part through the push card, and the auxiliary contact part is positioned at the side of the armature part; the armature portion is arranged in a manner of being biased towards one side far away from the auxiliary contact portion relative to the magnetic circuit portion, so that one side, close to the auxiliary contact portion, of the armature portion leaves a mounting space of the auxiliary contact portion on the base. The invention makes the auxiliary contact part have enough installation space on the basis of product miniaturization, and effectively solves the problem of insufficient insulation distance between the magnetic circuit part and the auxiliary contact part.

Description

Small magnetic latching relay

Technical Field

The invention relates to the field of relays, in particular to a small magnetic latching relay.

Background

The magnetic latching relay is a new type relay developed in recent years, and is also an automatic switch, and like other electromagnetic relays, the magnetic latching relay has the function of automatically switching on and off a circuit. The magnetic latching relay has the advantages that the normally closed state or the normally open state of the magnetic latching relay completely depends on the action of the permanent magnet, the switching of the switching state of the magnetic latching relay is completed by triggering of a pulse electric signal with a certain width, and the opening and closing states of the contact are normally kept by the magnetic force generated by the permanent magnet. When the contact of the relay needs to be in an open or close state, the relay only needs to excite the coil by positive (negative) direct current pulse voltage, and the relay completes the state conversion of opening and closing instantly. Normally, when the contact is in the hold state, the coil does not need to be energized, and the relay state can be maintained by only the magnetic force of the permanent magnet.

In order to monitor the contact state of the main contacts of the product, a magnetic latching relay of the prior art is provided with an auxiliary contact portion which is located at the side of an armature portion, and the armature portion is matched with a driving spring of the contact portion and an auxiliary moving spring of the auxiliary contact portion through a push card. In order to further compress the product space and realize product miniaturization, some magnetic latching relays are provided with a yielding groove on an armature part to avoid an auxiliary contact part, so that the product has enough space to install the auxiliary contact part on the basis of miniaturization. However, this approach may result in insufficient insulation distance between the magnetic circuit portion and the auxiliary contact portion, and providing a relief groove on the armature portion may damage the integrity of the armature portion and increase the difficulty of processing the armature portion.

Disclosure of Invention

The invention provides a small magnetic latching relay aiming at the technical problems in the prior art, wherein an armature part of the small magnetic latching relay adopts a bias arrangement mode, and the problem of installation space of an auxiliary contact part on the basis of miniaturization is solved.

The technical scheme adopted by the invention for solving the technical problem is as follows: a small-sized magnetic latching relay comprises a base, a contact part, a magnetic circuit part, an armature part, a push card and an auxiliary contact part, wherein the contact part, the magnetic circuit part, the armature part, the push card and the auxiliary contact part are arranged on the base; the armature portion is arranged in a manner of being biased towards one side far away from the auxiliary contact portion relative to the magnetic circuit portion, so that one side, close to the auxiliary contact portion, of the armature portion leaves a mounting space of the auxiliary contact portion on the base.

Furthermore, the parts of the two yokes of the magnetic circuit part, which are matched with the armature part, respectively protrude towards one side far away from the auxiliary contact part, and one sides of the two yokes, which are close to the auxiliary contact part, retract inwards.

Furthermore, the armature part is rotatably connected to the base through a rotating shaft, and the rotating shaft is eccentrically arranged towards one side, close to the contact part, of the armature part.

Furthermore, a retaining wall positioned between the armature part and the contact part is arranged on the base, a first space for installing the magnetic circuit part and the armature part and a second space for installing the contact part are enclosed by the retaining wall and the peripheral walls of the base, and a third space for installing the auxiliary contact part is arranged beside the first space on the base; the bottom of the retaining wall is suspended or provided with a yielding opening to avoid the pushing card.

Furthermore, the pushing card is provided with a first slot and a second slot, the part of the armature iron part matched with the pushing card is inserted into the first slot, and the bottom of the driving reed is inserted into the second slot; the pushing clamp is provided with a pushing part matched with the auxiliary movable reed, and the pushing part is in line-surface contact with the auxiliary movable reed in a contact state.

Further, the rotation shaft of the armature portion is eccentrically disposed toward a side of the armature portion close to the contact portion.

Further, the device also comprises a shell with an opening at the bottom end, wherein the bottom of the shell is connected with the base and contains the contact part, the magnetic circuit part, the armature part and the auxiliary contact part; the magnetic steel part is also included, a first blocking wall is arranged in the shell, the first blocking wall and the side wall of the shell form an upper slot with a downward opening, the base is provided with a second blocking wall, the second blocking wall forms a lower slot, or the second blocking wall and the side wall of the base form 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 beside the contact part.

Further, the bottom of the first blocking wall is matched with the top of the second blocking wall in a staggered mode.

Further, the bottom of the first blocking wall is inserted into the lower slot; the inner side surface of the second blocking wall is provided with an upward first step surface, and the bottom end of the first blocking wall is in contact with or in clearance fit with the first step surface; the outer side surface of the first blocking wall is provided with a second step surface facing downwards, and the top end of the second blocking wall is in contact with or flush with or in clearance fit with the second step surface.

Furthermore, the main static reed of the contact part is wrapped in a multi-surface mode by the positioning part arranged on the base, and only one surface, facing the active reed, of the main static reed is exposed.

Compared with the prior art, the invention has the following beneficial effects:

1. because the armature part is arranged in a bias way towards one side far away from the auxiliary contact part relative to the magnetic circuit part, and the side, close to the auxiliary contact part, of the armature part leaves the installation space of the auxiliary contact part on the base, the invention ensures that the auxiliary contact part has enough installation space on the basis of product miniaturization and effectively solves the problem of insufficient insulation distance between the magnetic circuit part and the auxiliary contact part. Particularly, the armature part does not need to be provided with a yielding groove of 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.

2. The parts of the two yokes of the magnetic circuit part, which are matched with the armature part, protrude towards one side far away from the auxiliary contact part respectively, so that the two yokes can be ensured to be effectively matched with the armature part arranged in an offset manner, and the magnetic conduction efficiency is ensured.

3. The part of the armature iron part, which is matched with the push card, is not arranged in a bias way relative to the magnetic circuit part, so that a force application point and a force bearing point on the push card can be kept on a central axis, and the push card is ensured not to deviate in the moving process.

4. Be equipped with the barricade on the base between armature part and the contact site, not only can improve magnetic circuit part, armature part and contact site's creepage distance and air gap, can also improve prior art's base and adopt single frame structure installation magnetic circuit part, armature part and contact site, and lead to at the yielding problem of intermediate position to strengthen base structural strength, promote the positional stability of cartridge interference.

5. The pushing part of the pushing card is in line-surface contact with the auxiliary movable spring piece in a contact state, and the risk of scraping damage between the pushing part and the auxiliary movable spring piece can be reduced.

6. The rotating shaft of the armature portion is eccentrically arranged towards one side of the armature portion close to the contact portion, and can further avoid the auxiliary contact portion.

7. The bottom of the first blocking wall is matched with the top of the second blocking wall in a staggered mode, so that after a product is heated in the using process, even if the matching gap between the base and the shell is increased, the magnetic steel part and the contact part can be completely separated by utilizing the local staggered matching state of the first blocking wall and the second blocking wall, the heat attenuation of the magnetic steel part caused by the heat of the contact part is reduced, the air gap between the contact part and the magnetic steel part and the creepage distance are improved, and meanwhile the sensitivity of a protection structure of the magnetic steel part to temperature impact is reduced. In particular, the invention realizes the improvement of the insulation protection performance of the magnetic steel part by adopting the mode that the bottom of the first retaining wall is matched with the top of the second retaining wall in a staggered way, does not need to arrange additional parts, and has simple integral structure and easy processing and forming.

8. The main static reed of the contact part is wrapped by the positioning part arranged on the base in a multi-surface mode, and the creepage distance between the main static reed and the magnetic steel part can be increased.

9. After the armature part is arranged in an offset way relative to the magnetic circuit part, the attraction force borne by the armature part is staggered with the thrust of the armature part to the pushing card, but the armature part is stably limited on the base by a rotating shaft, so that the armature part cannot be skewed in the pushing process, and the normal and stable action of the armature part is ensured.

The invention is further explained in detail with the attached drawings and the embodiments; a small-sized magnetic latching relay of the present invention is not limited to the embodiment.

Drawings

FIG. 1 is a schematic perspective view of the present invention (without the housing, magnetic steel portion);

fig. 2 is a perspective configuration view of a magnetic circuit portion and an armature portion of the present invention in a combined state;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a schematic perspective view of the base of the present invention (including the main stationary spring plate);

FIG. 5 is a top view of the base of the present invention;

FIG. 6 is a cross-sectional view of a base of the present invention;

FIG. 7 is a schematic view of the engagement of the auxiliary movable spring with the push card according to the present invention;

FIG. 8 is a first cross-sectional view of the present invention;

FIG. 9 is a second cross-sectional view of the present invention;

FIG. 10 is a cross-sectional view III of the present invention (without the housing);

FIG. 11 is a schematic perspective view of the housing and magnetic steel portion of the present invention in exploded form;

FIG. 12 is a perspective view of the housing and magnetic steel portion of the present invention in combination;

FIG. 13 is a perspective view of the base and magnetic steel portion of the present invention in combination;

FIG. 14 is a cross-sectional view of the base, housing and magnet steel portion of the present invention in an assembled state;

fig. 15 is an enlarged schematic view of portion a of fig. 14;

the magnetic circuit breaker comprises a shell 1, a shell 11, a first blocking wall 111, a second step surface 12, an upper slot 2, a base 21, a retaining wall 22, a first space 23, a second space 24, a third space 25, a second blocking wall 251, a first step surface 26, a lower slot 27, a positioning part 3, a magnetic circuit part 31, a coil former 32, a yoke iron 33, a coil 34, an iron core 4, an armature part 41, an armature 42, a permanent magnet 43, a plastic part 431, a push block 44, a rotating shaft 5, a contact part 51, a main leading-out piece 52, an active spring piece 53, a main static spring piece 6, an auxiliary contact part 61, an auxiliary leading-out piece 62, an auxiliary movable spring piece 63, an auxiliary static spring piece 7, a push card 71, a first slot 72, a second slot 73, a push part 74, a relief notch 8, a magnetic steel part 81, an arc blowing magnetic steel 82, a magnetic sheet, a magnetic isolation sheet 821 and a folded edge.

Detailed Description

The terms "first," "second," "third," and the like in this disclosure are used solely to distinguish between similar items and not necessarily to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "up", "down", "left", "right", "front" and "rear" are used based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the scope of the present invention. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In addition, in the description of the present application, "and/or" describes an association relationship of associated objects, indicating that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone.

Referring to fig. 1-15, the small magnetic latching relay of the present invention comprises a housing 1 with an open bottom end, a base 2, and a contact portion 5, a magnetic circuit portion 3, an armature portion 4, a push card 7 and an auxiliary contact portion 6 mounted on the base 2, wherein the bottom of the housing 1 is connected to the base 2 and encloses the contact portion 5, the magnetic circuit portion 3, the armature portion 4 and the auxiliary contact portion 6. The magnetic circuit part 3 comprises a coil rack 31, a coil 33 wound on the coil rack 31, an iron core 34 penetrating the coil rack 31 and two yokes 32, wherein the two yokes 32 are respectively L-shaped, one side of each yoke 32 is riveted and fixed with two ends of the iron core 34, and the other sides of the two yokes 32 are respectively positioned on the same side of the outer side of the coil rack 31 and are arranged oppositely. The contact part 5 comprises a main lead-out piece 51, a driving reed 52 and a main static reed 53, the main lead-out piece 51 and the static reed are respectively inserted into the base 2, the upper end of the driving reed 52 is riveted and fixed with the main lead-out piece 51, the lower end of the driving reed 52 is provided with a driving contact, and the driving contact is correspondingly matched with the main static contact arranged on the main static reed 53. The auxiliary contact part 6 comprises an auxiliary leading-out piece 61, an auxiliary movable spring piece 62 and an auxiliary static spring piece 63, the auxiliary leading-out piece 61 and the auxiliary static spring piece 63 are respectively inserted into the base 2, the upper end of the auxiliary movable spring piece 62 is riveted and fixed with the upper end of the auxiliary leading-out piece 61, an auxiliary movable contact is arranged at the lower end of the auxiliary movable spring piece 62, and the auxiliary movable contact is correspondingly matched with the auxiliary static contact arranged on the auxiliary static spring piece 63.

In this embodiment, the armature portion 4 is rotatably connected to the base 2 by using the rotating shaft 44 and is located between the magnetic circuit portion 3 and the contact portion 5, and the armature portion 4 is matched with the two yokes 32 of the magnetic circuit portion 3 and is matched with the driving spring 52 of the contact portion 5 and the auxiliary moving spring 62 of the auxiliary contact portion 6 by the pushing clip 7 slidably disposed on the base 2, and the auxiliary contact portion 6 is located beside the armature portion 4; the armature part 4 is arranged in a bias way relative to the magnetic circuit part 3 towards the side far away from the auxiliary contact part 6, so that the side, close to the auxiliary contact part 6, of the armature part 4 leaves the installation space of the auxiliary contact part 6 on the base 2, and therefore the invention enables the auxiliary contact part 6 to have enough installation space on the basis of product miniaturization and effectively solves the problem of insufficient insulation distance between the magnetic circuit part 3 and the auxiliary contact part 6. In addition, the armature portion 4 does not need to be provided with a yielding groove of the auxiliary contact portion 6, the integrity of the armature portion 4 cannot be damaged, and the processing difficulty of the armature portion 4 cannot be increased. The armature portion 4 is disposed offset to a side away from the auxiliary contact portion 6 with respect to the magnetic circuit portion 3 such that a center line L1 of the magnetic circuit portion 3 in the axial direction thereof and a center line L2 of the armature portion 4 in the axial direction thereof are offset from each other in the arrangement direction of the magnetic circuit portion 3 and the armature portion 4 (also in the longitudinal direction of the base 1), as shown in fig. 3 (in the figure, L1, L2 respectively indicate a center line of the magnetic circuit portion 3 in the axial direction thereof and a center line of the armature portion in the axial direction thereof), and the center line L2 is located on a side of the center line L1 away from the auxiliary contact portion 6.

In the present embodiment, as shown in fig. 2 and 3, the portions of the two yokes 32 of the magnetic circuit portion 3 that engage with the armature portion 4 respectively protrude to the side away from the auxiliary contact portion 6, and the sides of the two yokes 32 that are close to the auxiliary contact portion 6 are retracted, so that not only can the effective engagement of the two yokes 32 with the biased armature portion 4 be ensured, thereby maintaining the magnetic conduction efficiency, but also the auxiliary contact portion 6 can be avoided.

In the present embodiment, the portion of the armature portion 4 that engages with the push card 7 is not offset from the magnetic circuit portion 3. The magnetic circuit portion 3 and the contact portion 5 are arranged along the length direction of the base 2, and the magnetic circuit portion 3 and the contact portion 5 are respectively arranged in the center in the width direction of the base 2. The part of the armature part 4, which is matched with the pushing card 7, is not arranged in an offset way relative to the magnetic circuit part 3, therefore, the part of the armature part 4, which is matched with the pushing card 7, is also arranged in the middle of the width direction of the base 2, so that the pushing force of the armature part 4 to the pushing card 7 is positioned on the central line of the length direction of the base 2, and the driving spring piece 52 of the contact part 5 can be better pushed.

In the present embodiment, as shown in fig. 4-6, a retaining wall 21 is provided on the base 2 between the armature portion 4 and the contact portion 5, the retaining wall 21 and the peripheral walls of the base 2 enclose 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, and the base 2 is provided with a third space 24 for installing the auxiliary contact portion 6 beside the first space 22; the bottom of the retaining wall 21 is suspended or provided with a yielding opening to avoid the pushing card 7. The setting of barricade 21 not only can improve creepage distance and the air clearance of magnetic circuit part 3, armature part 4 and contact segment 5, can also improve prior art's base and adopt single frame structure installation magnetic circuit part, armature part and contact segment that enclose, and lead to the yielding problem in the intermediate position to strengthen base 2's structural strength, promote the positional stability of cartridge interference.

In this embodiment, as shown in fig. 7, the push card 7 is provided with a first slot 71 and a second slot 72, a portion of the armature portion 4, which is engaged with the push card 7, is inserted into the first slot 71, and a bottom of the driving spring 52 is inserted into the second slot 72, as shown in fig. 8. The push card 7 is provided with a push part 73 for matching with the auxiliary movable spring piece 62, and the push part 73 is in line-surface contact with the auxiliary movable spring piece 62 in a contact state, so that the risk of scraping and damaging between the push part 73 and the auxiliary movable spring piece 62 can be reduced. Specifically, the pushing portion 73 has a cylindrical shape, but is not limited thereto. The bottom of the auxiliary movable spring plate 62 is provided with an extension piece 621 extending laterally thereof and adapted to engage with the pushing portion 73. The pushing card 7 is provided with a yielding notch 74 at a position close to the auxiliary static reed 63 so as to avoid the auxiliary static reed 63.

In the present embodiment, the rotation shaft 44 of the armature portion 4 is eccentrically disposed toward the side of the armature portion 4 close to the contact portion 5. The armature portion 4 specifically includes two armatures 41, a permanent magnet 42, a plastic part 43 and the rotating shaft 44, the permanent magnet 42 is stacked between the two armatures 41 and wrapped and fixed by the plastic part 43, and the rotating shaft 44 horizontally penetrates through the plastic part 43. The length of the two armatures 41 is not uniform, and the armature closer to the magnetic circuit portion 3 is shorter and the armature farther from the magnetic circuit portion 3 is longer. The armature portion 4 is substantially H-shaped, and the other sides of the yokes 32 of the magnetic circuit portion 3 are inserted into upper and lower openings formed by H-shapes of the armature portion 4, respectively. The part of the armature portion 4 that cooperates with the push card 7 is specifically a push block 431 disposed at the bottom of the plastic member 43.

In this embodiment, as shown in fig. 11 to 15, the magnetic steel part 8 further includes a magnetic steel part, a first blocking wall 11 is disposed in the housing 1, the first blocking wall 11 and a side wall of the housing 1 define an upper slot 12 with a downward opening, the base 2 is provided with a second blocking wall 25, the second blocking wall 25 defines a lower slot 26, or the second blocking wall 25 and a side wall of the base 2 define a lower slot 26; the upper end of the magnetic steel part 8 is inserted into the upper slot 12, the lower end of the magnetic steel part 8 is inserted into the lower slot 26, and the magnetic steel part 8 is located beside the contact part 5. The bottom of the housing 1 is surrounded by the base 2, and a side of the lower slot 26 facing the side wall of the housing 1 is open, but not limited thereto, and in other embodiments, a side of the lower slot 26 facing the side wall of the housing 1 is closed.

In this embodiment, as shown in fig. 14 and 15, the bottom of the first blocking wall 11 and the top of the second blocking wall 25 are alternatively fitted, and the two are in clearance fit or non-clearance fit. Specifically, the bottom of the first blocking wall 11 is inserted into the lower insertion groove 26. The inner side surface of the second blocking wall 25 is provided with an upward first step surface 251, and the bottom end of the first blocking wall 11 is in contact with or in clearance fit with the first step surface 251. The first step surface 251 can provide support for the first blocking wall 11, so as to improve structural stability, and at the same time, the first step surface 251 can reduce the thickness of the top of the second blocking wall 25, so that the lower insertion groove 26 has an excess space therein to accommodate the bottom of the first blocking wall 11. The outer side surface of the first blocking wall 11 is provided with a second step surface 111 facing downwards, and the top end of the second blocking wall 25 is in contact with or flush with or in clearance fit with the second step surface 111. The second step surface 111 is provided such that the thickness of the bottom portion of the second blocking wall 25 is reduced, thereby making the occupied space of the bottom portion of the second blocking wall 25 smaller.

In this embodiment, the upper end and the last slot 12 interference fit of magnet steel part 8, the lower extreme of magnet steel part 8 with slot 26 interference fit down for magnet steel part 8 can be better positioned in slot 12 and slot 26 down, avoids appearing rocking. The magnetic steel part 8 specifically comprises a sheet-shaped arc-blowing magnetic steel 81 and a magnetic separation sheet 82, the arc-blowing magnetic steel 81 and the magnetic separation sheet 82 are laminated together, the magnetic separation sheet 82 is arranged on the outer side, and the arc-blowing magnetic steel 81 is arranged on the inner side. The thickness of the magnetism isolating sheet 82 is smaller than that of the arc blowing magnetic steel 81, the two sides of the width of the magnetism isolating sheet 82 are respectively provided with a folding edge 821, and the folding edges 821 on the two sides of the width of the magnetism isolating sheet 82 respectively wrap the two sides of the width of the arc blowing magnetic steel 813. The number of the magnetic steel part 8, the first blocking wall 11 and the second blocking wall 25 is two, the first blocking wall 11 and the second blocking wall 25 correspond to the magnetic steel part 8 one to one, the contact part 5 is located between the two magnetic steel parts 8, the arrangement direction of the two magnetic steel parts 8 is perpendicular to the contact breaking direction of the contact part 5, and specifically, the two magnetic steel parts 8 are arranged along the width direction of the base 2. In other embodiments, the magnetic steel component comprises only arc blowing magnetic steel.

In the present embodiment, main static reed 53 of contact portion 5 is multi-surface wrapped by positioning portion 27 provided on base 2, and only one surface of main static reed 53 facing active reed 52 is exposed, as shown in fig. 4, 8, and 9. Thus, the creepage distance between main stationary spring piece 53 and magnetic steel portion 8 can be increased. During installation, after the main static reed 53 is riveted with the main static contact, the main static reed and the main leading-out piece 51 are inserted into the base 2 from bottom to top, and the magnetic circuit part 3 and the main leading-out piece 51 are respectively inserted into the base 2 from top to bottom. The auxiliary movable spring plate 62 and the auxiliary stationary spring plate 63 are respectively laterally inserted into the third space 24 formed by the base 2.

The invention relates to a small-sized magnetic latching relay, wherein an armature part 4 is arranged in a bias way relative to a magnetic circuit part 3 towards one side far away from an auxiliary contact part 6, and the side of the armature part 4 close to the contact part is provided with a mounting space of the auxiliary contact part 6 on a base 2, so that the invention can ensure that the auxiliary contact part 6 has enough mounting space on the basis of product miniaturization and effectively solve the problem of insufficient insulation distance between the magnetic circuit part 3 and the auxiliary contact part 6. In addition, the armature portion 4 does not need to be provided with a yielding groove of the auxiliary contact portion 6, the integrity of the armature portion 4 cannot be damaged, and the processing difficulty of the armature portion 4 cannot be increased. Although the attraction force applied to the armature portion 4 and the pushing force of the armature portion 4 to the pushing card 7 are staggered after the armature portion 4 is offset with respect to the magnetic circuit portion 3, the armature portion 4 is stably limited on the base 2 by the rotating shaft 44, and therefore the armature portion 4 does not skew in the pushing process.

According to the small magnetic latching relay, after the bottom of the first blocking wall 11 is in staggered fit with the top of the second blocking wall 25, the arc blowing magnetic steel 813 can be completely separated from the contact part 5, and even if the fit clearance between the base 2 and the shell 1 is increased after a product is heated in the use process, the first blocking wall 11 and the second blocking wall 25 still keep a local staggered fit state, so that the arc blowing magnetic steel 813 can be completely separated from the contact part 5, the heat attenuation of the arc blowing magnetic steel 813 caused by the heat of the contact part 5 is reduced, the air clearance between the contact part 5 and the arc blowing magnetic steel 813 and the creepage distance are improved, and the problem that the contact part 5 is easily conducted through the arc blowing magnetic steel 813 in a breaking state due to too small creepage distance between the contact part 5 and the magnetic steel is avoided. The invention simultaneously reduces the sensitivity of the protective structure (i.e. the shell 11 and the first retaining wall 11 thereof, and the base 22 and the second retaining wall 25 thereof) of the arc-blowing magnetic steel 813 to temperature impact. In particular, the improvement of the insulation protection performance of the arc blowing magnetic steel 813 is realized by adopting a mode that the bottom of the first retaining wall 11 is matched with the top of the second retaining wall 25 in a staggered mode, no additional part is required to be arranged, the whole structure is simple, and the processing and forming are easy.

According to the small magnetic latching relay, the structure is further miniaturized through optimizing the structure, the assembling operability is guaranteed, the contact gap monitoring position, the over-stroke monitoring position and the contact pressure monitoring position are guaranteed, and the product process parameters can be monitored. Meanwhile, the requirement for miniaturization of products is met, the assembly performance of the products is improved, the risk of foreign matter generation in the assembly process is reduced, the reliability of the products is further improved, and the electrical service life of the magnetic latching relay is effectively guaranteed.

The parts which are not involved in the small magnetic latching relay are the same as or can be realized by adopting the prior art.

The above embodiments are only used to further illustrate a small magnetic latching relay of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. A small-sized magnetic latching relay comprises a base, a contact part, a magnetic circuit part, an armature part, a push card and an auxiliary contact part, wherein the contact part, the magnetic circuit part, the armature part, the push card and the auxiliary contact part are arranged on the base; the method is characterized in that: the armature portion is arranged in a manner of being biased towards one side far away from the auxiliary contact portion relative to the magnetic circuit portion, so that one side, close to the auxiliary contact portion, of the armature portion leaves a mounting space of the auxiliary contact portion on the base.

2. The miniature magnetic latching relay of claim 1, wherein: the parts of the two yokes of the magnetic circuit part, which are matched with the armature part, respectively protrude towards one side far away from the auxiliary contact part, and one sides of the two yokes, which are close to the auxiliary contact part, retract inwards.

3. The miniature magnetic latching relay of claim 1, wherein: the part of the armature part, which is matched with the push card, is not arranged in a bias way relative to the magnetic circuit part.

4. The miniature magnetic latching relay of claim 1, wherein: the base is provided with a retaining wall positioned between the armature part and the contact part, the retaining wall and the peripheral walls of the base enclose a first space for installing the magnetic circuit part and the armature part and a second space for installing the contact part, and the base is provided with a third space for installing the auxiliary contact part beside the first space; the bottom of the retaining wall is suspended or provided with a yielding opening to avoid the pushing card.

5. The miniature magnetic latching relay of claim 1, wherein: the pushing card is provided with a first slot and a second slot, the part of the armature iron part matched with the pushing card is inserted into the first slot, and the bottom of the driving reed is inserted into the second slot; the pushing clamp is provided with a pushing part matched with the auxiliary movable reed, and the pushing part is in line-surface contact with the auxiliary movable reed in a contact state.

6. The miniature magnetic latching relay of claim 1, wherein: the armature part is rotatably connected to the base through a rotating shaft, and the rotating shaft is eccentrically arranged towards one side, close to the contact part, of the armature part.

7. The miniature magnetic latching relay of claim 1, wherein: the bottom of the shell is connected with the base and contains the contact part, the magnetic circuit part, the armature part and the auxiliary contact part; the magnetic steel part is also included, a first blocking wall is arranged in the shell, the first blocking wall and the side wall of the shell form an upper slot with a downward opening, the base is provided with a second blocking wall, the second blocking wall forms a lower slot, or the second blocking wall and the side wall of the base form 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 beside the contact part.

8. The miniature magnetic latching relay of claim 7, wherein: the bottom of the first retaining wall is in staggered fit with the top of the second retaining wall.

9. The miniature magnetic latching relay of claim 8, wherein: the bottom of the first blocking wall is inserted into the lower slot; the inner side surface of the second blocking wall is provided with an upward first step surface, and the bottom end of the first blocking wall is in contact with or in clearance fit with the first step surface; the outer side surface of the first blocking wall is provided with a second step surface facing downwards, and the top end of the second blocking wall is in contact with or flush with or in clearance fit with the second step surface.

10. The miniature magnetic latching relay of claim 7, wherein: the main static reed of the contact part is wrapped in a multi-surface mode by a positioning part arranged on the base, and only one surface, facing the active reed, of the main static reed is exposed.

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