CN219534413U - Magnetic circuit part free of riveting of pressure spring and electromagnetic relay - Google Patents

Abstract

The utility model discloses a magnetic circuit part of a pressure spring without riveting and an electromagnetic relay, wherein the magnetic circuit part comprises a coil assembly, a yoke iron, an armature iron and the pressure spring, and the yoke iron is fixed on the coil assembly; the pressure spring comprises a fixing part and a spring piece part which is arranged on the fixing part and is used for providing a restoration counterforce for the armature, the fixing part is clamped on the yoke, and the fixing part and/or the spring piece part limit the armature at the knife edge of the yoke, so that the armature can swing around the knife edge of the yoke and limit the armature in the thickness direction and/or the width direction of the part where the knife edge of the yoke is located. The pressure spring is not only free from being arranged on a base or a coil frame of a relay, but also free from being riveted on a yoke iron and an armature, does not generate plastic scraps, can reduce investment of riveting equipment, and can also carry out multidirectional limiting on the armature and provide restoration counter force for the armature, thereby improving the impact resistance and the anti-drop capability of the armature and improving the working stability of the armature.

Description

Magnetic circuit part free of riveting of pressure spring and electromagnetic relay

Technical Field

The utility model relates to the technical field of relays, in particular to a magnetic circuit part free of riveting of a pressure spring and an electromagnetic relay.

Background

An electromagnetic relay is an electronic control device which is commonly used in automatic control circuits and is actually an "automatic switch" which uses a smaller current to control a larger current, thus playing roles in automatic regulation, safety protection, switching circuits, etc. in the circuit.

The magnetic circuit part of the electromagnetic relay in the prior art generally comprises a coil assembly, a yoke, an armature and a pressure spring, wherein the yoke is fixed on the coil assembly, the pressure spring is connected with the yoke and the armature in a riveting mode, and the armature is limited at the knife edge of the yoke, so that the yoke can swing around the knife edge of the yoke. However, the pressure spring is connected with the yoke iron and the armature iron in a riveting mode, so that the pressure spring cannot be disassembled, riveting equipment is needed, and the riveting cost is high. For this reason, several ways of no-riveting compression springs exist in the prior art, the first way is to fix the compression springs on the base or coil frame of the relay in a clamping manner, and then to provide limit for the armature, and the second way is to fix the compression springs on the yoke in a clamping manner, and then to provide limit for the armature (see the chinese patent of patent No. 202121340326.0). However, the first approach suffers from the following disadvantages: the pressure spring is made of metal, the base and the coil rack are made of plastic, and the pressure spring is directly clamped on the base or the coil rack to easily generate plastic scraps; the second way suffers from the following disadvantages: the pressure spring only limits the armature at the knife edge of the yoke in one direction, and can not provide restoration counter force for the armature, and the limitation of the armature is insufficient, when the relay or the magnetic circuit part thereof is impacted or falls down, the armature is easy to misplace and shift, and the function of the product is invalid.

Disclosure of Invention

The utility model provides a magnetic circuit part of a pressure spring free of riveting and an electromagnetic relay, which aim at the technical problems in the prior art, and can provide multidirectional limit for an armature while the structure of the pressure spring is improved so as to prevent the pressure spring from being installed in a riveting way.

The technical scheme adopted for solving the technical problems is as follows: a magnetic circuit part of a pressure spring free of riveting comprises a coil assembly, a yoke, an armature and a pressure spring, wherein the yoke is fixed on the coil assembly; the pressure spring comprises a fixing part and a spring piece part which is arranged on the fixing part and is used for providing a restoration counterforce for the armature, the fixing part is clamped on the yoke, and the fixing part and/or the spring piece part limit the armature at the knife edge of the yoke, so that the armature can swing around the knife edge of the yoke and limit the armature in the thickness direction and/or the width direction of the part where the knife edge of the yoke is located.

Further, the fixing part is hollow, the fixing part is sleeved outside the yoke from one end of the yoke where the knife edge is located along the length direction of the part where the knife edge is located, and the fixing part is connected with the yoke in a buckling way when being sleeved in place so as to limit the fixing part to be separated from the yoke from the direction opposite to the sleeving direction; one end of the armature, which is matched with the knife edge, is positioned in the fixing part.

Further, the fixing part is provided with a clamping tongue, the yoke is provided with a clamping groove, and when the fixing part is sleeved in place, the clamping tongue is clamped into the clamping groove.

Furthermore, two opposite side surfaces of the yoke are respectively provided with a limiting step for limiting the sleeving depth of the fixing part.

Further, the fixing part is in a semi-surrounding frame shape and comprises a main sheet body and two side sheet bodies, the two side sheet bodies are arranged at two opposite ends of the main sheet body and are oppositely arranged, one ends of the two side sheet bodies, which are far away from the main sheet body, are respectively bent inwards relatively to form two opposite stop sheets; when the fixing part is sleeved in place, the main sheet body and the stop sheet are positioned at two opposite sides of the yoke, one or more of the main sheet body, the side sheet body and the stop sheet are connected with the yoke in a buckling manner, and one end of the armature, which is matched with the knife edge, is positioned between the two sheet bodies and blocked by the stop sheet; the spring piece part is arranged on the main sheet body.

Further, two sides of one end of the armature, which is matched with the knife edge, are respectively provided with a limiting block, two limiting blocks are respectively provided with a yielding gap, and the limiting blocks enter the fixing part through the yielding gap and are prevented from yielding gaps and being blocked by the limiting blocks by moving along with the armature in the opposite direction of the sleeving direction of the fixing part.

Further, a pushing arm extending along the direction from one end of the armature far away from the knife edge to one end of the armature matching with the knife edge is arranged at one end of the armature matching with the knife edge, and the elastic piece part is propped against the pushing arm.

Further, the fixing part is provided with a limiting piece extending to one side close to the coil assembly along the thickness direction of the part where the knife edge of the yoke is located, and the limiting piece is matched with one side of the armature opposite to the yoke; the elastic piece part is arranged at one end of the limiting piece, facing the pushing arm, and is propped against one surface of the pushing arm, opposite to the yoke iron; the pushing arm penetrates through the abdication hole arranged on the fixing part, and the abdication hole extends to the limit piece.

Further, the elastic piece part comprises an elastic piece and at least one limiting part, the elastic piece is arranged on the fixing part, extends to one side close to the coil assembly along the thickness direction of the part where the knife edge of the yoke is located, and is matched with one side of the armature opposite to the yoke; the limiting part is arranged on the elastic sheet and is used for hanging or clamping the armature.

Further, a stop block is arranged at one end of the armature, which is matched with the knife edge, penetrates through the abdication hole formed in the fixing part and is clamped at one side of the yoke, which is opposite to the coil assembly.

Further, the free end of the elastic sheet protrudes out of one end of the armature far away from the knife edge, and a movable contact or a pushing piece is arranged, or one end of the armature matched with the knife edge is provided with a pushing arm extending along the direction from one end of the armature far away from the knife edge to one end of the armature matched with the knife edge.

The utility model further provides an electromagnetic relay, which comprises a contact part and the magnetic circuit part of the pressure spring free of riveting, wherein the armature is matched with the movable reed of the contact part through a pushing clamp, or the movable reed of the contact part is integrally formed on the elastic sheet part, or the elastic sheet part is provided with a pushing piece which is matched with the movable reed of the contact part.

Compared with the prior art, the utility model has the following beneficial effects:

1. because the pressure spring comprises the fixing part and the elastic piece part, the fixing part is clamped on the yoke, and the fixing part and/or the elastic piece part limit the armature at the knife edge of the yoke, so that the armature can swing around the knife edge of the yoke and limit the armature in the thickness direction and/or the width direction of the part where the knife edge of the yoke is positioned, the pressure spring is not only prevented from being arranged on a base or a coil frame of a relay, but also is prevented from being riveted on the yoke and the armature, plastic scraps are not generated, the investment of riveting equipment can be reduced, the armature can be limited in multiple directions, and a restoring counter force is provided for the armature, so that the impact resistance and the anti-falling capability of the armature are improved, and the working stability of the armature is improved.

2. The fixing part is hollow, the fixing part is sleeved outside the yoke along the length direction of the part where the knife edge of the yoke is located from one end of the knife edge of the yoke, and the fixing part is connected with the yoke in a buckling manner when being sleeved in place, so that the fixing part is limited to be separated from the yoke from the opposite direction of the sleeving direction, and the fixing part of the pressure spring and the yoke are convenient to install and firm to fix. Particularly, the fixing part is in a semi-surrounding frame shape and comprises the main sheet body and two side sheet bodies, so that the fixing part is simpler in structure, easy to form and capable of limiting the armature in the width direction and the thickness direction of the position where the knife edge of the yoke is located.

3. The armature is also provided with the limiting block which is matched with the stop piece in a stop mode, so that the fixing part can limit the armature in the thickness direction of the position where the knife edge of the yoke is located, and meanwhile assembly and matching of the armature and the pressure spring are facilitated.

The utility model is described in further detail below with reference to the drawings and examples; however, the magnetic circuit part of the pressure spring free riveting and the electromagnetic relay are not limited to the embodiment.

Drawings

FIG. 1 is an exploded schematic view of a magnetic circuit portion of the present utility model according to an embodiment;

fig. 2 is a schematic perspective view of a compression spring according to an embodiment of the present utility model;

fig. 3 is a schematic perspective view of an armature of the utility model according to an embodiment;

fig. 4 is a schematic perspective view showing a yoke according to an embodiment of the present utility model;

fig. 5 is a schematic diagram illustrating an assembly of an armature and a compression spring according to an embodiment of the present utility model;

fig. 6 is a second schematic diagram illustrating the assembly of the armature and the compression spring according to the first embodiment of the present utility model;

fig. 7 is a third schematic illustration of the assembly of the armature and the compression spring according to the first embodiment of the present utility model;

fig. 8 is a schematic diagram showing an assembly of an armature and a compression spring with a yoke according to an embodiment of the present utility model;

fig. 9 is a schematic perspective view of a magnetic circuit portion of the present utility model;

FIG. 10 is a top view of a magnetic circuit portion of the present utility model according to an embodiment;

FIG. 11 is an exploded view of an embodiment of the present utility model;

fig. 12 is a schematic perspective view of a contact portion of the present utility model;

FIG. 13 is a schematic perspective view of a pusher card of the present utility model;

FIG. 14 is a top view (without the housing) of an embodiment of the present utility model;

FIG. 15 is a schematic perspective view of a housing of the present utility model;

FIG. 16 is a top view of a housing of the present utility model;

FIG. 17 is a cross-sectional view A-A of FIG. 16, illustrating an embodiment;

FIG. 18 is a top view of a base of the present utility model;

FIG. 19 is a B-B cross-sectional view of FIG. 18, according to an embodiment;

FIG. 20 is a bottom view of an embodiment of the present utility model;

FIG. 21 is a cross-sectional view of C-C of FIG. 20, according to an embodiment;

fig. 22 is a schematic perspective view of a compression spring according to a second embodiment of the present utility model;

fig. 23 is a schematic perspective view of an armature of the second embodiment of the utility model;

fig. 24 is a schematic perspective view of a magnetic circuit portion of the present utility model according to a first embodiment;

fig. 25 is a schematic diagram showing a perspective construction of a magnetic circuit portion of the present utility model according to a second embodiment;

wherein 1, base, 11, through hole, 12, first partition, 13, second partition, 14, long groove, 2, outer shell, 21, guide post, 211, thin section, 212, thick section, 22, first rib, 23, second rib, 3, magnetic circuit part, 31, yoke, 311, clamping hole slot, 312, limit step, 313, knife edge, 32, armature, 321, push arm, 322, limit block, 323, bump, 324, stopper, 33, pressure spring, 331, spring piece part, 332, main piece body, 333, side piece body, 334, stopper piece, 335, clamping tongue, 336, stopper piece, 337, yielding hole, 338, yielding gap, 4, normally open contact group, 5, normally closed contact group, 41/51, movable spring piece, 42/52, movable contact, 43/53, movable spring part, 44/54, movable spring lead-out foot, 45/55, stationary spring lead-out foot, 6, push clip, 61, first limit slot, 62, push claw, 63, stopper piece, 64, second limit slot; 3311. shrapnel, 3312, hook, 3313, rivet hole.

Detailed Description

In the present disclosure, the terms "first," "second," and the like are used merely to distinguish between similar objects and not necessarily to describe a particular sequence or order, nor are they to be construed as indicating or implying a relative importance. In addition, in the description of the present utility model, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Example 1

Referring to fig. 1 to 10, a magnetic circuit portion of a compression spring according to the present utility model includes a coil assembly, a yoke 31, an armature 32, and a compression spring 33, wherein the yoke 31 is fixed to the coil assembly. Specifically, the coil assembly includes a coil bobbin 34, a coil 35 wound around the coil bobbin 34, and an iron core 36 penetrating through the coil bobbin 34, the yoke 31 is L-shaped, one side of the yoke 31 is riveted and fixed with one end of the iron core 36, and a free end of the other side of the yoke 31 is provided with a knife edge 313. The compression spring 33 includes a fixing portion and a spring piece portion 331 disposed on the fixing portion and configured to provide a restoring reaction force for the armature 32, where the fixing portion is clamped to the yoke 31, and the fixing portion and/or the spring piece portion 331 limit the armature 32 at the edge 313 of the yoke 31, so that the armature 32 can swing around the edge 313 of the yoke 31, and limit the thickness direction (i.e., the direction in which the X axis is located in the three-dimensional coordinate system in fig. 1) and/or the width direction (i.e., the direction in which the Z axis is located in the three-dimensional coordinate system in fig. 1) of the portion of the armature 32 where the edge 313 of the yoke 31 is located. The knife edge 313 of the yoke 31 is located on the other side of the yoke 31.

In this embodiment, the fixing portion is hollow, a sleeve opening is provided at one end of the fixing portion, the fixing portion is sleeved outside the yoke 31 along a length direction of a portion where the knife edge 313 is located (i.e., a direction where a Y axis in a three-dimensional coordinate system in fig. 1 is located) from one end of the yoke 31 where the knife edge 313 is located, and the fixing portion is in snap connection with the yoke 31 when being sleeved in place, so as to limit the fixing portion from being separated from the yoke 31 in a direction opposite to the sleeving direction. One end of the armature 32, which is matched with the knife edge 313, is positioned in the fixing part so as to be limited by the fixing part in the thickness direction and/or the width direction of the part of the yoke 31 where the knife edge 313 is positioned.

In this embodiment, the fixing portion is provided with a locking tongue 335, the yoke 31 is provided with a locking groove 311 (as shown in fig. 4), and when the fixing portion is sleeved in place, the locking tongue 335 is locked into the locking groove 311, so as to achieve the snap connection between the fixing portion and the yoke 31. Limiting steps 312 are respectively arranged on two opposite side surfaces of the yoke 31 and used for limiting the sleeving depth of the fixing part. Specifically, the yoke 31 is provided with a stopper step 312 on both sides in the width direction of the other side thereof, respectively, as shown in fig. 4.

In this embodiment, as shown in fig. 2, the fixing portion has a semi-surrounding frame structure, and includes a main sheet 332 and two side sheet 333, where the two side sheet 333 are disposed at two opposite ends of the main sheet 332 and are disposed opposite to each other. The two side sheets 333 are bent inward by 90 ° or nearly 90 ° at the ends far away from the main sheet 332, respectively, to form two opposite stop sheets 334, and a space is provided between the two stop sheets 334. When the fixing portion is sleeved on the yoke 31, the main sheet 332 and the stop sheets 334 are located on two opposite sides of the yoke 31, specifically, the main sheet 332 is located on one side of the yoke 31 opposite to the coil assembly, and the two stop sheets 334 are located on one side of the yoke 31 opposite to the coil assembly. One or more of the main body 332, the side body 333 and the stopper 334 are snap-coupled to the yoke 31, specifically, in this embodiment, the main body 332 is snap-coupled to the yoke 31, that is, the main body 332 is provided with the snap-lock tab 335. The end of the armature 32 that cooperates with the knife edge 313 is located between the two side plates 333 and is blocked by the stop plate 332. Therefore, the fixing portion can limit the armature 32 in the width direction and the thickness direction of the other side of the yoke 31.

In this embodiment, two opposite sides of the end of the armature 32 matching the knife edge 313 are respectively provided with a limiting block 322, and the two limiting blocks 334 are respectively provided with a yielding gap 338 (as shown in fig. 2), where the two yielding gaps 338 are opposite. The two limiting blocks 322 enter the fixing portion through the two yielding notches 338 respectively, and move along the opposite direction of the sleeving direction of the fixing portion along with the armature 32 to avoid the yielding notches and be blocked by the stop piece 334.

In this embodiment, a pushing arm 321 extends from an end of the armature 32 that is opposite to the knife edge 313 toward an end of the armature that is opposite to the knife edge 313 along an end of the armature 32 that is far away from the knife edge 313, the pushing arm 321 is located at a side of the yoke 31 that is opposite to the coil assembly, and the elastic piece portion 331 abuts against the pushing arm 321.

In this embodiment, as shown in fig. 2, the other end of the fixing portion opposite to one end thereof has a limiting piece 336 extending toward a side close to the coil assembly along the thickness direction of the portion where the knife edge 313 of the yoke 31 is located, and the limiting piece 336 is engaged with a side of the armature 32 opposite to the yoke 31. Specifically, the limiting plate 336 is disposed at one of the remaining two ends of the main plate 332. The pushing arm 321 passes through the relief hole 337 provided on the fixing portion, specifically, the relief hole 337 is provided on the main sheet 332 and extends to the position limiting sheet 336. The elastic piece 331 is disposed at an end of the limiting piece 336 facing the pushing arm 321, and abuts against a surface of the pushing arm 321 opposite to the yoke 31. The spring plate 331 is a sheet-shaped body in an inclined state, and the free end thereof is bent to form a rounded portion, and the rounded portion is contacted with the pushing arm 321, so as to reduce the contact friction force therebetween. The limiting piece 336 and the elastic piece 331 thereon limit the armature 32 in the length direction of the other side of the yoke 31.

In this embodiment, the assembling process of the armature 32, the compression spring 33, and the yoke 31 is as follows: firstly, the pushing arm 321 of the armature 32 passes through the relief hole 337 from the inner side of the main sheet 332, and the two limiting blocks 322 on the armature 32 are respectively aligned with the relief notches 338 of the two side sheet 333, as shown in fig. 5, and then, the two limiting blocks 322 on the armature 32 are respectively entered into the fixing portion through the relief notches 338, as shown in fig. 6; then, the whole armature 32 is moved towards the direction of the limiting piece 336, so that two limiting pieces 322 of the whole armature are far away from the yielding notch 338 and are blocked by the two limiting pieces 334, at this time, the armature 32 and the limiting piece 336 are close to each other, and the limiting piece 336 plays a limiting role on the armature 32, as shown in fig. 7; finally, the sleeving opening of the whole fixing part is aligned with the knife edge 313 of the yoke 31 and sleeved on the yoke 31, as shown in fig. 8, the arrow in the drawing indicates the moving direction of the fixing part, when the whole fixing part is sleeved in place, one end of the two side sheet bodies 333 away from the limiting sheet 336 is blocked by the limiting step 312 on the yoke 31, as shown in fig. 9, so as to limit the sleeving depth of the fixing part, and meanwhile, the clamping tongue 335 on the main sheet body 332 is clamped into the clamping groove 311 on the yoke 31, so that the whole fixing part is limited to be separated from the yoke 31 from the opposite direction of the sleeving direction. Therefore, the fixing portion of the compression spring 33 is substantially wrapped around the yoke 31 by three or more surfaces, and the fixing portion of the compression spring 33 is firmly fixed to the yoke 31 by the snap-fit connection. After the assembly, one end of the armature 32 is mounted on the knife edge 313 of the yoke 31, and the spring plate 331 abuts against the pushing arm 321 of the armature 32, so that a magnetic gap exists between the armature 32 and the other end of the iron core 36 before the coil 35 is energized, as shown in fig. 10.

According to the magnetic circuit part free of riveting of the pressure spring, the pressure spring 33 is free of riveting on the yoke 31 and the armature 32, so that the assembly process of the pressure spring 33 is simpler, and the investment of riveting equipment can be reduced. In particular, the compression spring 33 not only can provide a restoring reaction force for the armature 32, but also can provide three-dimensional limit for the armature 32, so that the installation accuracy of the armature 32 is greatly improved, the working stability of the armature 32 is also improved, and dislocation, displacement and the like of the armature 32 caused by impact, drop and the like are reduced.

Referring to fig. 1 to 21, an electromagnetic relay of the present utility model includes a base 1, a magnetic circuit portion 3 and a contact portion, wherein the magnetic circuit portion 3 is a magnetic circuit portion of the pressure spring according to the present utility model. The contact portion includes a plurality of contact groups including, but not limited to, at least one normally open contact group 4 and at least one normally closed contact group 5. The normally open contact group 4 and the normally closed contact group 5 respectively comprise a movable spring part and a static spring part 43/53 which are matched with each other, and the movable spring part comprises a movable reed 41/51 and a movable contact 42/52; the normally open contact set 4 and the normally closed contact set 5 are arranged on the base 1 along a first horizontal direction, and the free ends of the movable reeds are respectively provided with movable contacts 42/52; the armature 32 of the magnetic circuit portion 3 cooperates with the movable springs by pushing the card 6 to close the normally open contact group 4 and open the normally closed contact group 5 when the coil of the magnetic circuit portion 3 is energized. The free end of the movable reed 41 of the normally open contact group 4 and the free end of the movable reed 51 of the normally closed contact group 5 face different sides in the second direction perpendicular to the first direction, and the movable reed 41 of the normally open contact group 4 extends obliquely in the contact opening direction thereof, and/or the movable reed 51 of the normally closed contact group 5 extends obliquely in the contact closing direction thereof, specifically, in this embodiment, only the movable reed 41 of the normally open contact group 4 extends obliquely in the contact opening direction thereof (i.e., rightward direction in the view of fig. 14) and the inclination angle is 5 ° to 10 °, while the extending direction of the movable reed 51 of the normally closed contact group 5 in the contact closing state thereof is substantially perpendicular to the first direction. The second direction is a horizontal direction, specifically, the first direction is a longitudinal direction of the base 1 (i.e. a direction in which the Y axis in the three-dimensional coordinate system in fig. 11 is located), the second direction is a width direction of the base 1 (i.e. a direction in which the X axis in the three-dimensional coordinate system in fig. 11 is located), but not limited thereto, and in other embodiments, the second direction is a height direction of the base. The number of the normally open contact sets 4 is plural, and the number of the normally closed contact sets 5 is two, but not limited to this, and the plurality of normally open contact sets 4 are located between the two normally closed contact sets 5.

In this embodiment, the normally open contact set 4 and the normally closed contact set 5 are the same component, specifically, the moving spring portion of the normally open contact set 4 and the moving spring portion of the normally closed contact set 5 are the same component, and the static spring portion 43 of the normally open contact set 4 and the static spring portion 53 of the normally closed contact set 5 are the same component. Therefore, the components of the normally-closed contact group 5 and the normally-open contact group 4 can be shared, thereby reducing the mold opening cost and the number of molds.

In this embodiment, the root of each movable spring is bent twice to form the structure shown in fig. 2, and the movable spring leading-out pins 44/54 extending downward are fixed. As shown in fig. 20, the moving spring pin 54 of the normally closed contact group 5 and the stationary spring pin 45 of the adjacent normally open contact group 4 are located on the same side in the second direction and are offset from each other in the first direction; the static spring leading-out pin 55 of the normally closed contact group 5 and the moving spring leading-out pin 44 of the adjacent normally open contact group 4 are positioned at the other side of the second direction and are staggered with each other in the first direction. Thus, not only is the wiring of customers facilitated, but also the creepage distance and the air gap between the adjacent normally open contact set 4 and the normally closed contact set 5 are increased, and the creepage distance and the air gap between the adjacent normally open contact set 4 and the normally closed contact set 5 are shown as line segments S in FIG. 20.

In this embodiment, as shown in fig. 13, the push card 6 is provided with at least one first limit groove 61 for driving the movable reed 41 of the normally open contact set 4 to move, and the movable reed of the normally open contact set 4 is inserted into the corresponding first limit groove 61; the pushing card 6 is further provided with at least one pushing claw 62 for pushing the movable reed of the normally closed contact group 5 to move, and the pushing claw 62 is positioned on the side of the movable reed 51 of the corresponding normally closed contact group 5 facing the static reed part. The push card 6 is further provided with a plurality of separators 63 arranged along the first direction, and each separator 63 is respectively positioned between two adjacent normally closed contact sets 5 or between two adjacent normally open contact sets 4 or between two adjacent normally closed contact sets 5 and normally open contact sets 4.

In this embodiment, the present utility model further comprises a housing 2 having an open bottom end, wherein the bottom end of the housing 2 is connected to the base 1 and accommodates the magnetic circuit portion 3, the contact portion and the pusher card 6 therein. As shown in fig. 15-17, at least one guiding post 21 extending downward is disposed on the inner top surface of the housing 2, and the bottom of the guiding post 21 is inserted and fixed in a through hole 11 correspondingly disposed on the base 1. Specifically, the number of the guide posts 21 is plural, and the plurality of guide posts 21 are arranged in at least one row, each row being arranged along the horizontal first direction, and specifically, in the present embodiment, the plurality of guide posts 21 are arranged in one row, but not limited thereto. The guide posts 21 are each located approximately at the middle position of the housing 2 in the width direction. The part of the guide post 21 located in the through hole 11 is a thin section 211, the part above the thin section 211 is a thick section 212, the cross section of the thin section 211 is circular, and the cross section of the thick section 212 is square. In this way, the space for the base 1 to give way to the guide post 21 can be reduced, and the strength of the guide post 21 can be enhanced.

In this embodiment, the fixing manner of the bottom of the guide post 21 and the base 1 includes one or more of dispensing fixing, hot riveting fixing, and snap connection. When the guide posts 21 are fixed in a manner that does not require a fixing operation at the bottom end of the base 1, the through holes 11 may be replaced with grooves (alternatively called blind holes, countersinks).

In this embodiment, as shown in fig. 18, the base 1 is provided with a plurality of contact cavities arranged along the first direction, adjacent contact cavities are separated by a first partition wall 12 provided on the base 1, the first partition wall 12 extends along the first direction, and each contact cavity is provided with one normally open contact set 4 or one normally closed contact set 5. The inner top surface of the housing 2 is provided with a plurality of first ribs 22 arranged along the first direction, each first rib 22 extends along a horizontal direction (i.e. the second direction) perpendicular to the first direction, and each first rib 22 enters different contact cavities respectively and approaches the first partition wall 12. The bottom end of the first rib 22 is lower than the top end of the first partition wall 12, and the first rib 22 is a short rib, the height of the short rib is only slightly greater than the distance between the top end of the first partition wall 12 and the inner top surface of the shell, and specifically, the height of the first rib 22 is less than 1mm. Therefore, the height of the first rib 22 can be made low so as not to deform the housing 2 and to keep the outer surface of the housing 2 flat, and no weld mark is generated at the position corresponding to the first rib 22. If the first rib 22 is replaced by a baffle with a larger height, the two ends of the baffle in the length direction are free ends and are not connected with other structures of the shell, so that deformation occurs in injection molding of the top wall of the shell, and once the shell is deformed, the problems of incomplete assembly or bad clamping and scrapping and the like easily occur in the subsequent assembly process. The first ribs 22 and the first partition wall 12 form a barrier through mutual matching, so that contact splashes generated by contact component breakage can be isolated, and the contact splashes are prevented from running to other contact cavities through gaps between the top end of the first partition wall 12 and the inner top surface of the shell 2, thereby improving the cleanliness of each contact cavity and improving the reliability of electric contact of the utility model.

In this embodiment, as shown in fig. 18, the magnetic circuit portion 3 is horizontal, the magnetic circuit portion 3 and the contact portion are arranged along the second direction, the base 1 is provided with second partition walls 13 for separating the magnetic circuit portion 3 from the contact portion, the second partition walls 13 extend along the first direction, the number of the second partition walls 13 is two, the two second partition walls 13 are arranged in parallel, an elongated slot 14 extending along the first direction is formed between the two second partition walls 13, a second rib 23 extending along the first direction is arranged on the inner top surface of the housing 2 at a position corresponding to the elongated slot 14, and the second rib 23 is inserted into the elongated slot 14. In this way, not only the creepage distance and the space gap between the contact portion and the magnetic circuit portion 3 can be significantly increased, but also the height of the second rib 23 can be made very low, so that the outer shell 2 is not deformed, the outer surface of the outer shell 2 is kept flat, and no welding trace is generated at the position corresponding to the second rib 23. If the number of the second partition walls 13 is one, in order to ensure a sufficient creepage distance and a sufficient space gap between the contact portion and the magnetic circuit portion, the height of the second ribs needs to be made relatively high or a baffle plate needs to be used instead, which easily causes deformation and weld marks in the injection molding process of the housing. In this embodiment, the height of the second ribs 23 is less than 2mm, in particular less than or equal to 1.5mm. The pushing arm 321 of the armature 31 is engaged with each movable spring through the pushing card 6, specifically, a protruding block 323 is disposed on a side surface of a free end of the pushing arm 321, and is used for being inserted into the second limiting groove 64 disposed at one end of the pushing card 6.

According to the electromagnetic relay provided by the utility model, the free end of the movable reed 41 of the normally open contact group 4 and the free end of the movable reed 51 of the normally closed contact group 5 face to different sides in the second direction, and the movable reed 41 of the normally open contact group 4 obliquely extends in the contact disconnection direction, so that when the contact groups are arranged as close as possible to each other, the movable displacement of the movable reed 51 of the normally closed contact group 5 can occupy a part of the position of the movable reed 41 of the normally open contact group 4 (the fulcrum part of the movable reed 41 moves very little in the movement direction), so that the contact groups are more compact, and the length space of a product is reduced. The guide posts 21 are arranged, so that the top wall of the shell 2 can be pulled by the guide posts 21, the top wall of the shell 2 is thinner and/or is not easy to warp and deform under the condition of large area, and the bulge deformation of the top wall of the shell 2 caused by the difference of air pressure between the inside and outside of the product after plastic package is avoided.

Example two

Referring to fig. 22 to 25, a rivetless magnetic circuit portion of a compression spring according to the present utility model is different from the first embodiment in that: the elastic piece portion 331 includes an elastic piece 3311 and at least one limiting portion, the elastic piece 3311 is disposed at the fixing portion, and the elastic piece 3311 extends along a thickness direction of a portion of the yoke 31 where the knife edge 313 is located toward a side close to the coil assembly and is matched with a side of the armature 32 opposite to the yoke 31, and specifically, the elastic piece 3311 is disposed at one of two other ends of the main sheet 332 of the fixing portion and is substantially perpendicular to the main sheet 332. The limiting part is arranged on the elastic sheet 3311 and is used for hanging or clamping the armature 32. Specifically, the limiting portion is a hook 3312, which hooks the armature 32, and the number of the hooks 3312 is one, but not limited thereto. The hook 3312 hooks the end of the armature 32 away from the knife edge 313. In other embodiments, the limiting portion is an elastic card, which catches the armature.

In this embodiment, a stop 324 is disposed at an end of the armature 32 matching the knife edge 313, and the stop 324 passes through a relief hole 337 formed in the fixing portion and is clamped on a side of the yoke 31 opposite to the coil assembly. The relief hole 337 extends to the elastic piece 3311, thereby facilitating the improvement of the elastic deformation capability of the elastic piece 3311. The stopper 324 is provided to pull the armature 32 at one side of the other side of the yoke 31 in the thickness direction, so that the compression spring may be deformed to cause the armature 32 to move along the other side of the yoke 31 in the thickness direction when the magnetic circuit portion is hit or dropped.

In this embodiment, the free end of the elastic piece 3311 protrudes from the end of the armature 32 away from the knife edge 313, and the free end of the elastic piece 3311 is provided with a riveting hole 3313 for riveting the movable contact, so that the elastic piece 3311 also forms a movable spring, i.e. the movable spring and the pressure spring are integrally formed. In other embodiments, the free end of the spring plate is connected with a pushing piece, the pushing piece is matched with the movable reed of the contact part of the relay, and the pushing piece can be a single part, and can also consist of a pushing rod and a pushing card. In other embodiments, the end of the armature that mates with the knife edge extends along a direction from the end of the armature that is distal from the knife edge to the end of the armature that mates with the knife edge with a push arm that mates with a movable spring of a contact portion of a relay by a push clip.

The electromagnetic relay of the present utility model includes a contact portion and a magnetic circuit portion of the compression spring according to the second embodiment, in which the movable contact of the contact portion may be directly riveted to the free end of the spring, or a pushing member may be connected to the free end of the spring, the pushing member being engaged with the movable reed of the contact portion, or the armature may be identical to the first embodiment in that one end thereof engaged with the knife edge extends to have a pushing arm engaged with the movable reed of the contact portion by a pushing clip, so that in this case, the structure of the contact portion, the base, the housing, etc. of the electromagnetic relay may be identical to the first embodiment.

The magnetic circuit part and the electromagnetic relay of the pressure spring free riveting of the utility model have no parts which are the same as or can be realized by adopting the prior art.

The above embodiment is only used for further explaining a magnetic circuit portion and an electromagnetic relay of the present utility model, but the present utility model is not limited to the embodiment, and any simple modification, equivalent variation and modification of the above embodiment according to the technical substance of the present utility model falls within the protection scope of the technical solution of the present utility model.

Claims (12)

1. A magnetic circuit part of a pressure spring free of riveting comprises a coil assembly, a yoke, an armature and a pressure spring, wherein the yoke is fixed on the coil assembly; the method is characterized in that: the pressure spring comprises a fixing part and a spring piece part which is arranged on the fixing part and is used for providing a restoration counterforce for the armature, the fixing part is clamped on the yoke, and the fixing part and/or the spring piece part limit the armature at the knife edge of the yoke, so that the armature can swing around the knife edge of the yoke and limit the armature in the thickness direction and/or the width direction of the part where the knife edge of the yoke is located.

2. The pressure spring rivetless magnetic circuit portion according to claim 1, wherein: the fixing part is hollow, is sleeved outside the yoke from one end of the yoke where the knife edge is located along the length direction of the part where the knife edge is located, and is connected with the yoke in a buckling manner when the fixing part is sleeved in place so as to limit the fixing part to be separated from the yoke from the direction opposite to the sleeving direction; one end of the armature, which is matched with the knife edge, is positioned in the fixing part.

3. The pressure spring rivetless magnetic circuit portion according to claim 2, wherein: the fixing part is provided with a clamping tongue, the yoke is provided with a clamping groove, and when the fixing part is sleeved in place, the clamping tongue is clamped into the clamping groove.

4. The pressure spring rivetless magnetic circuit portion according to claim 2, wherein: limiting steps are respectively arranged on two opposite side surfaces of the yoke and used for limiting the sleeving depth of the fixing part.

5. The pressure spring rivetless magnetic circuit portion according to claim 2, wherein: the fixing part is in a semi-surrounding frame shape and comprises a main sheet body and two side sheet bodies, the two side sheet bodies are arranged at two opposite ends of the main sheet body and are oppositely arranged, one ends of the two side sheet bodies, which are far away from the main sheet body, are respectively bent inwards relatively to form two opposite stop sheets; when the fixing part is sleeved in place, the main sheet body and the stop sheet are positioned at two opposite sides of the yoke, one or more of the main sheet body, the side sheet body and the stop sheet are connected with the yoke in a buckling manner, and one end of the armature, which is matched with the knife edge, is positioned between the two sheet bodies and blocked by the stop sheet; the spring piece part is arranged on the main sheet body.

6. The pressure spring rivetless magnetic circuit portion according to claim 5, wherein: the two sides of one end of the armature, which is matched with the knife edge, are respectively provided with a limiting block, the two limiting blocks are respectively provided with a yielding gap, and the limiting blocks enter the fixing part through the yielding gap and are prevented from yielding gaps and are blocked by the limiting blocks by moving along with the armature in the opposite direction of the sleeving direction of the fixing part.

7. The pressure spring rivetless magnetic circuit portion according to any one of claims 1 to 6, wherein: the armature is provided with a push arm which extends along the direction from one end of the armature away from the knife edge to one end of the armature matched with the knife edge, and the elastic piece part is propped against the push arm.

8. The pressure spring rivetless magnetic circuit portion according to claim 7, wherein: the fixed part is provided with a limiting piece extending to one side close to the coil assembly along the thickness direction of the part where the knife edge of the yoke is located, and the limiting piece is matched with one side of the armature opposite to the yoke; the elastic piece part is arranged at one end of the limiting piece, facing the pushing arm, and is propped against one surface of the pushing arm, opposite to the yoke iron; the pushing arm penetrates through the abdication hole arranged on the fixing part, and the abdication hole extends to the limit piece.

9. The pressure spring rivetless magnetic circuit portion according to any one of claims 1 to 6, wherein: the elastic piece part comprises an elastic piece and at least one limiting part, the elastic piece is arranged on the fixing part, extends to one side close to the coil assembly along the thickness direction of the part where the knife edge of the yoke is located, and is matched with one side of the armature opposite to the yoke; the limiting part is arranged on the elastic sheet and is used for hanging or clamping the armature.

10. The pressure spring rivetless magnetic circuit portion according to claim 9, wherein: and one end of the armature iron, which is matched with the knife edge, is provided with a stop block, and the stop block penetrates through a yielding hole formed in the fixing part and is clamped at one side of the yoke iron, which is opposite to the coil assembly.

11. The pressure spring rivetless magnetic circuit portion according to claim 9, wherein: the free end of the elastic sheet protrudes out of one end of the armature far away from the knife edge and is provided with a movable contact or a pushing piece, or one end of the armature matched with the knife edge is provided with a pushing arm extending along the direction from one end of the armature far away from the knife edge to one end of the armature matched with the knife edge.

12. An electromagnetic relay comprising a contact portion characterized in that: the spring assembly further comprises a magnetic circuit part free of riveting of the pressure spring according to any one of claims 1-11, wherein the armature is matched with the movable reed of the contact part through a pushing clamp, or the movable reed of the contact part is integrally formed on the spring piece part, or the spring piece part is provided with a pushing piece which is matched with the movable reed of the contact part.