CN219226169U - Electromagnetic relay capable of improving attraction capability - Google Patents

Abstract

The utility model discloses an electromagnetic relay capable of improving attraction capacity, which comprises a base part and a movable spring armature part, wherein the base part comprises a base, and a coil, an iron core and a static spring part which are arranged on the base; the movable spring armature component comprises a movable spring part, an armature and magnetic steel, and a plastic body which integrates the movable spring part, the armature and the magnetic steel into a whole through an injection molding mode, and is arranged at the top of the base part in a teeterboard mode; the static spring part is matched with the movable spring part and forms a normally open type contact assembly or a normally closed type contact assembly; the armature has a first end proximate the moving spring portion and a second end distal the moving spring portion; the area of the contact surface between the first end of the armature and one end of the iron core is smaller than that between the second end of the armature and the other end of the iron core. The utility model can reduce the magnetic steel force of the second end of the armature, and improve the force matching problem of the relay, thereby improving the attraction capability of the first end of the armature.

Description

Electromagnetic relay capable of improving attraction capability

Technical Field

The utility model relates to the technical field of relays, in particular to an electromagnetic relay capable of improving attraction capability.

Background

The miniature relay comprises a base part and a movable spring armature part, wherein the base part comprises a base, a coil, an iron core and at least one static spring part, wherein the coil, the iron core and the at least one static spring part are arranged on the base, and the pole faces at the two ends of the iron core are respectively exposed upwards; the moving spring armature component comprises at least one moving spring part, an armature and magnetic steel, and a plastic body which integrates the moving spring part, the armature and the magnetic steel into a whole piece through an injection molding mode. The middle part of the movable spring armature component is provided with a soldering lug structure, the movable spring armature component is arranged at the top of the base part through the soldering lug structure, and the two ends of the armature exposed out of the plastic body are respectively matched with pole faces at the two ends of the iron core correspondingly. The miniature relay is generally a conversion type relay and is provided with two static spring parts and two movable spring parts, wherein the static spring parts are matched with the movable spring parts in a one-to-one correspondence manner, the action is completed by matching magnetic steel force generated by magnetic steel with electromagnetic force generated by a coil, contact pressure and counter force generated by a movable spring, two sides of a movable spring armature component are in a balanced structure structurally, the magnetic steel is placed in a middle position, and magnetic forces generated by the left side and the right side are equal. When the above-mentioned ultra-small relay is changed into a normally open type relay or a normally closed type relay, it has only one static spring portion and one moving spring portion, that is, the moving spring armature member has only one contact on one side, and the side having the contact has more contact pressure than the side having no contact, which results in unbalanced forces on both sides, and the cooperation of relay forces may be difficult, resulting in a risk that the relay may have difficulty in attraction.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model provides an electromagnetic relay with improved attraction capability, which improves the structure of an armature so as to achieve the purpose of reducing the magnetic steel force at the non-contact side.

The technical scheme adopted for solving the technical problems is as follows: an electromagnetic relay capable of improving attraction capability comprises a base part and a movable spring armature part, wherein the base part comprises a base, a coil, an iron core and a static spring part, wherein the coil, the iron core and the static spring part are arranged on the base, and pole faces at two ends of the iron core are respectively exposed upwards; the movable spring armature component comprises a movable spring part, an armature and magnetic steel, and a plastic body integrating the movable spring part, the armature and the magnetic steel into a whole by injection molding, the movable spring armature component is arranged at the top of the base part in a teeterboard mode, and two ends of the armature exposed out of the plastic body are correspondingly matched with pole faces at two ends of the iron core respectively; the static spring part is matched with the movable spring part and forms a normally open type contact assembly or a normally closed type contact assembly; the armature has a first end proximate the moving spring portion and a second end distal the moving spring portion; the area of the contact surface between the first end of the armature and one end of the iron core is smaller than the area of the contact surface between the second end of the armature and the other end of the iron core.

Further, the bottom of the second end of the armature is locally flattened.

Further, two ends of the bottom of the second end of the armature in the width direction are flattened respectively, so that only the middle area of the bottom of the second end of the armature is contacted with the other end of the iron core.

Further, the thickness of the second end of the armature is gradually reduced from the middle toward both ends in the width direction.

Further, the second end of the armature is made short, so that the dimension of the contact surface between the first end of the armature and one end of the iron core in the preset direction is larger than the dimension of the contact surface between the first end of the armature and the other end of the iron core in the preset direction, and the preset direction is the length direction of the armature.

Further, the movable spring part comprises two movable spring plates and a conducting plate, the two movable spring plates are respectively positioned at two sides of the armature in the width direction, and the two movable spring plates are respectively and integrally formed or electrically connected with the conducting plate; the static spring part comprises two static spring pieces, the two static spring pieces are respectively positioned below the two movable spring pieces, and static contacts arranged on the two static spring pieces are respectively matched with movable contacts arranged on the two movable spring pieces in a one-to-one correspondence manner.

Furthermore, the setting height of the two static reed is higher than the height of the pole face of the iron core respectively.

Further, the base is provided with a retaining wall between the static reed and the iron core.

Further, the conductive sheet is entirely enclosed in the plastic body.

Further, the base is integrally formed by injection molding the coil, the iron core, the static spring part and the coil lead-out terminal.

Further, a welding lug structure is arranged at the middle part of the movable spring armature component, and the movable spring armature component is arranged at the top of the base part through the welding lug structure; the welding plate structure comprises two welding plates, the two welding plates are positioned on two sides of the middle part of the armature in the width direction, two welding tables are arranged at the top of the base, and the two welding plates are respectively welded and fixed with the two welding tables.

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

1. because the area of the contact surface between the first end of the armature and one end of the iron core is smaller than the area of the contact surface between the second end of the armature and the other end of the iron core, the utility model can reduce the magnetic steel force of the armature away from the second end (namely, the non-contact side) of the moving spring part, thereby improving the force matching problem of the unilateral (namely, normally open type or normally closed type) microminiature relay and improving the attraction capability of the armature close to the first end (namely, the side with the contact) of the moving spring part.

2. The utility model adopts a mode of locally flattening or shortening the armature to realize inconsistent contact areas between the two ends and the pole faces of the iron core, has simple structure and is easy to process and form.

3. The setting height of the two static spring plates is respectively higher than the height of the pole face of the iron core, so that the insulation performance between the static spring plates and the iron core can be ensured.

4. The base is provided with a retaining wall between the static reed and the iron core, so that the insulating property between the static reed and the iron core can be further improved.

The utility model is described in further detail below with reference to the drawings and examples; the electromagnetic relay of the present utility model for improving the attraction capability is not limited to the embodiment.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present utility model (without a housing);

fig. 2 is a schematic perspective view of a moving spring armature assembly according to an embodiment of the utility model;

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

fig. 4 is a right side view of an armature of the utility model according to an embodiment;

FIG. 5 is a schematic view showing a structure of a moving spring portion and a static spring portion in a disconnected state according to an embodiment of the present utility model;

FIG. 6 is a schematic view showing a structure of a moving spring portion and a static spring portion in a contact state according to an embodiment of the present utility model;

FIG. 7 is a partial cross-sectional view of a moving spring armature assembly of the utility model according to one embodiment;

fig. 8 is a top view (without plastic body) of a moving spring armature assembly of the utility model according to an embodiment;

FIG. 9 is a schematic diagram showing the positional relationship between a movable spring portion and a lug structure according to an embodiment of the present utility model;

fig. 10 is a schematic perspective view of an armature (including magnetic steel) according to an embodiment of the utility model;

fig. 11 is a front view (without plastic body) of a moving spring armature assembly of the utility model according to an embodiment;

FIG. 12 is a schematic view of a base portion of the present utility model;

fig. 13 is a front view (including magnetic steel) of an armature and an iron core in a mated state according to the second embodiment of the present utility model;

the welding device comprises a base, 11, a welding table, 12, a retaining wall, 2, an iron core, 3, a static spring piece, 31, a static contact, 32, a static spring lead-out terminal, 4, an armature, 41, a groove, 42, a middle area, 5, a movable spring part, 51, a movable spring piece, 52, a conductive sheet, 53, a movable contact, 6, a plastic body, 7, a soldering lug structure, 71, a soldering lug, 72, a connecting sheet, 8, magnetic steel, 9 and a coil lead-out terminal.

Detailed Description

Example 1

Referring to fig. 1-12, an electromagnetic relay for improving attraction capability of the present utility model includes a housing, a base portion and a moving spring armature component, wherein the base portion includes a base 1, and a coil, an iron core 2 and a static spring portion disposed on the base 1, specifically, the base 1 integrates the coil, the iron core 2, the static spring portion and a coil lead-out terminal into a whole through injection molding, and pole faces at two ends of the iron core 2 are respectively exposed upwards and are located at two ends of the base 1. The movable spring armature component comprises a movable spring part 5, an armature 4 and magnetic steel 8, and a plastic body 6 which integrates the movable spring part 5, the armature 4 and the magnetic steel 8 into a whole in an injection molding mode, wherein the magnetic steel 8 is positioned below the armature 4. The movable spring armature component is arranged at the top of the base 1 in a teeterboard mode, specifically, a soldering lug structure 7 is arranged at the middle part of the movable spring armature component, the movable spring armature component is arranged at the top of the base part through the soldering lug structure 7, and two ends of the armature 4 exposed out of the plastic body 6 are correspondingly matched with pole faces at two ends of the iron core 2 respectively. The static spring portion is fitted with the dynamic spring portion 5 and constitutes a normally open contact assembly, and therefore, the present utility model constitutes a normally open relay. In other embodiments, the static spring portion and the dynamic spring portion form a normally closed contact assembly.

In this embodiment, the armature 4 has a first end close to the moving spring portion 5 and a second end distant from the moving spring portion 5, both ends of the armature 4 in the length direction constituting the first end and the second end, respectively. The area of the contact surface between the first end of the armature 4 and one end of the core 2 is smaller than the area of the contact surface between the second end of the armature 4 and the other end of the core 2. Because the utility model is a normally open relay, the first end of the armature 4, which is close to the moving spring part 5, is the normally open end, and the second end of the armature 4, which is far away from the moving spring part 5, is the normally closed end.

In this embodiment, the bottom of the second end of the armature 4 is locally flattened, so that the area of the contact surface of the first end of the armature 4, which is close to the moving spring portion 5, and one end of the iron core 2 is smaller than the area of the contact surface of the second end of the armature 4, which is far away from the moving spring portion 5, and the other end of the iron core 2. Specifically, as shown in fig. 3 and 4, the two ends of the bottom of the second end of the armature 4 in the width direction are flattened respectively, so that the second end of the armature 4 away from the moving spring portion 5 has a structure in which the middle area 42 is thicker and thinner, and the thickness of the second end of the armature 4 is gradually reduced from the middle to the two ends in the width direction. The middle area 42 is elongated and extends along the length direction of the armature 4, the periphery of the middle area 42 is square, and the bottom surfaces of the two ends of the second end of the armature 4 are respectively inclined surfaces 43 so as to gradually transition to the middle area 42. Therefore, only the middle region 42 of the bottom of the second end of the armature 4, which is far from the moving spring 5, contacts the other end of the core 2, so that the magnetic flux leakage at the two ends of the second end of the armature 4 in the width direction is large, and the magnetic field generated by the magnetic steel 8 is concentrated in the middle region 42, thereby reducing the magnetic steel force. In this way, the armature 4 is also forced to be balanced in the width direction away from the second end of the moving spring portion 5, and is not biased to one side in the width direction.

In this embodiment, as shown in fig. 5 to 9, the movable spring part 5 includes two movable springs 51 arranged in parallel and a conductive sheet 52 located between the two movable springs 51, where the conductive sheet 52 and the two movable springs 51 are integrally formed, but not limited thereto, and in other embodiments, the conductive sheet and the two movable springs are electrically connected by welding or riveting. The movable spring part 5 is located above the armature 4, the two movable springs 51 are respectively located above two sides of the armature 4 in the width direction, the conductive sheet 52 spans across the armature 4, the conductive sheet 52 and the two movable springs 51 are located on the same side of the soldering lug structure 7, specifically, one end bottoms of the two movable springs 51, which are far away from the soldering lug structure 7, are respectively provided with a movable contact 53, and the other ends of the two movable springs 51, which are close to the soldering lug structure 7, are respectively integrally formed with the conductive sheet 52. In this way, the conductive sheet 52 of the movable spring part 5 does not need to avoid the magnetic steel 8 below the armature 4, and thus the conductive sheet 52 can be arranged as close to the two movable springs 51 as possible. In particular, the utility model locates the conductive sheet 52 and the two movable reeds 51 on the same side of the soldering lug structure 7, so that the conductive path of the whole movable reed part 5 is greatly shortened, thereby achieving the purpose of greatly reducing contact resistance.

In this embodiment, as shown in fig. 5-9, the conductive sheet 52 and the soldering lug structure 7 are independent from each other, so that after the soldering lug structure 7 is fixed, no influence is exerted on the action of the movable reed 51, and the current on the movable reed 51 is not conducted to the soldering lug structure 7, so that the reaction structure of the relay is not influenced. The conductive sheet 52 is completely encased in the plastic body 6 and there is a gap between the conductive sheet 52 and the tab structure 7, which gap is filled with a portion of the plastic body 6. In this way, the insulation performance between the moving spring part 5 and the lug structure 7 can be ensured.

In this embodiment, as shown in fig. 7 and 8, the soldering lug structure 7 is located above the armature 4, and the soldering lug structure 7 includes two soldering lugs 71 and a connecting piece 72, the two soldering lugs 71 are located above two sides of the middle part of the armature 4 in the width direction, and the connecting piece 72 spans the armature 4 and is integrally formed with the two soldering lugs 71. In this way, the connecting piece 72 and the two welding pieces 71 are formed by the same sheet material, so that the flatness and the height of the two welding pieces 71 can be ensured to be consistent, and the accuracy of the installation of the moving spring armature component can be ensured. The two lugs 71 are of an integral structure, so that the rigidity of the lugs can be improved to a certain extent. As shown in fig. 12, two welding tables 11 are disposed on the top of the base 1, and the two welding tabs 71 are welded and fixed with the two welding tables 11 respectively. The welding piece structure 7 is arranged above the armature 4, so that the intrusion of the magnetic steel placing space below the armature 4 can be avoided. The middle part of the connecting sheet 72 adopts a hollowed-out design, so that the weight can be reduced, the material can be saved, and the connecting sheet 72 is favorable for releasing stress, so that the connecting sheet is not easy to deform due to the influence of thermal expansion and cold contraction.

In this embodiment, as shown in fig. 10 and 11, the portion of the armature 4 below the conductive sheet 52 is provided with the groove 41, so that the distance between the armature 4 and the conductive sheet 52 is larger, and the insulation effect is better. The gap formed between the recess 41 and the conductive piece 52 is filled with a part of the plastic body 6, so that insulation performance between the moving spring part 5 and the armature 4 can be ensured. The two ends of the groove 41 in the width direction of the armature 4 are respectively provided with openings, that is, the two ends of the groove 41 in the width direction of the armature 4 are respectively led to the outside to form an open type. In this way, a greater distance from the conductive plate 52 can be ensured everywhere at the location of the recess 41.

In this embodiment, as shown in fig. 5 and 6, the static spring portion includes two static springs 3, the two static springs 3 are respectively under the two movable springs 51, and the static contacts 31 provided on the two static springs 3 are respectively matched with the movable contacts 53 provided on the two movable springs 51 in a one-to-one correspondence manner. The setting height of the two static spring plates 3 is respectively higher than the height of the pole face of the iron core 2, so that the insulation performance between the static spring plates 3 and the iron core 2 can be ensured. As shown in fig. 12, the base 1 is provided with a retaining wall 12 between the static reed 3 and the iron core 2, so that the insulation performance between the static reed 3 and the iron core 2 can be further improved.

In this embodiment, the base portion has only four lead-out terminals (including two coil lead-out terminals 9 and two static spring lead-out terminals 32), and there is a large isolation between the four lead-out terminals, and there is a large creepage distance and air gap between the coil and the contact.

According to the electromagnetic relay with improved attraction capability, two movable reeds 51 are integrally formed through a conducting plate 52, two sets of contacts are connected in series, the disconnection state of the two sets of contacts is shown in fig. 5, the closing state of the two sets of contacts is shown in fig. 6, and in fig. 6, arrows indicate the current direction. The relay is internally divided by two groups of contacts, so that the high-voltage breaking capacity of the contacts is improved under the condition of keeping the volume unchanged, and when the contacts are disconnected, two groups of contacts are simultaneously disconnected on a circuit, so that the voltage withstand capacity between the disconnected contacts is greatly improved.

The electromagnetic relay for improving the attraction capability provided by the utility model has the advantages that the area of the contact surface between one end of the normally open side of the armature and the pole face of the iron core is larger than that of the contact surface between one end of the normally closed side of the armature and the pole face of the iron core, so that the magnetic steel force of one end of the normally closed side of the armature can be reduced, the force matching problem of the normally open relay is solved, the attraction capability of one end of the normally open side of the armature is improved, and the attraction of the normally open side of a moving spring armature component is facilitated. When the normally closed relay is changed into the normally closed relay, the area of the contact surface between one end of the normally closed side of the armature and the pole face of the iron core is larger than that of the contact surface between one end of the normally open side of the armature and the pole face of the iron core, so that the problem of force matching of the normally wall relay can be solved, and the attraction capability of one end of the normally wall side of the armature is improved.

Example two

Referring to fig. 13, an electromagnetic relay with improved attraction capability according to the present utility model is different from the first embodiment in that: the second end of the armature 4, which is far away from the moving spring part 5, is made short, so that the dimension of the contact surface of the first end, which is close to the moving spring part 5, of the armature 4 with one end of the iron core 2 in a preset direction is larger than the dimension of the contact surface of the second end, which is far away from the moving spring part 5, of the armature 4 with the other end of the iron core 2 in the preset direction, and the preset direction is the length direction of the armature 4. Therefore, a certain horizontal distance L is provided between the second end of the armature 4, which is far from the moving spring portion 5, and the outer edge of the other end of the core 2, and the outer edge of the first end of the armature 4, which is near to the moving spring portion 5, is aligned with the outer edge of the one end of the core 2, or the outer edge of the first end of the armature 4, which is near to the moving spring portion 5, is slightly protruded from the outer edge of the one end of the core 2. In this way, the area of the contact surface of the first end, close to the moving spring part 5, of the armature 4 with one end of the iron core 2 is smaller than the area of the contact surface of the second end, away from the moving spring part 5, of the armature 4 with the other end of the iron core 2, so that the magnetic steel force of the second end, away from the moving spring part 5, of the armature 4 is reduced, and the normally open side of the moving spring armature component is facilitated.

The electromagnetic relay for improving the attraction capability has no part which is the same as or can be realized by adopting the prior art.

The above embodiment is only used for further illustrating an electromagnetic relay capable of improving the attraction capability of the present utility model, but the present utility model is not limited to the embodiment, and any simple modification, equivalent variation and modification made to 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 (10)

1. An electromagnetic relay capable of improving attraction capability comprises a base part and a movable spring armature part, wherein the base part comprises a base, a coil, an iron core and a static spring part, wherein the coil, the iron core and the static spring part are arranged on the base, and pole faces at two ends of the iron core are respectively exposed upwards; the movable spring armature component comprises a movable spring part, an armature and magnetic steel, and a plastic body integrating the movable spring part, the armature and the magnetic steel into a whole by injection molding, the movable spring armature component is arranged at the top of the base in a teeterboard mode, and two ends of the armature exposed out of the plastic body are correspondingly matched with pole faces at two ends of the iron core respectively; the static spring part is matched with the movable spring part and forms a normally open type contact assembly or a normally closed type contact assembly; the armature has a first end proximate the moving spring portion and a second end distal the moving spring portion; the method is characterized in that: the area of the contact surface between the first end of the armature and one end of the iron core is smaller than the area of the contact surface between the second end of the armature and the other end of the iron core.

2. The electromagnetic relay of claim 1 wherein the actuation capability is enhanced, wherein: the bottom of the second end of the armature is locally flattened.

3. The electromagnetic relay of claim 2 wherein the actuation capability is enhanced, wherein: and the two ends of the bottom of the second end of the armature in the width direction are respectively flattened, so that only the middle area of the bottom of the second end of the armature is contacted with the other end of the iron core.

4. The electromagnetic relay for improving a pull-in capability according to claim 3, wherein: the thickness of the second end of the armature decreases from the middle toward both ends in the width direction.

5. The electromagnetic relay of claim 1 wherein the actuation capability is enhanced, wherein: the second end of the armature is made short, so that the dimension of the contact surface between the first end of the armature and one end of the iron core in the preset direction is larger than the dimension of the contact surface between the first end of the armature and the other end of the iron core in the preset direction, and the preset direction is the length direction of the armature.

6. The electromagnetic relay of claim 1 wherein the actuation capability is enhanced, wherein: the movable spring part comprises two movable spring plates and a conducting plate, the two movable spring plates are respectively positioned at two sides of the armature in the width direction, and the two movable spring plates are respectively integrally formed or electrically connected with the conducting plate; the static spring part comprises two static spring pieces, the two static spring pieces are respectively positioned below the two movable spring pieces, and static contacts arranged on the two static spring pieces are respectively matched with movable contacts arranged on the two movable spring pieces in a one-to-one correspondence manner.

7. The electromagnetic relay of claim 6 wherein the enhanced actuation capability is characterized by: the setting height of the two static reed is higher than the height of the pole face of the iron core respectively.

8. The electromagnetic relay of claim 6 wherein the enhanced actuation capability is characterized by: the base is provided with a retaining wall between the static reed and the iron core.

9. The electromagnetic relay of claim 6 wherein the enhanced actuation capability is characterized by: the conductive sheet is completely encased in the plastic body.

10. The electromagnetic relay of claim 1 wherein the actuation capability is enhanced, wherein: the base integrates the coil, the iron core, the static spring part and the coil leading-out end into a whole through injection molding; the middle part of the movable spring armature component is provided with a welding lug structure, and the movable spring armature component is arranged at the top of the base part through the welding lug structure; the welding plate structure comprises two welding plates, the two welding plates are positioned on two sides of the middle part of the armature in the width direction, two welding tables are arranged at the top of the base, and the two welding plates are respectively welded and fixed with the two welding tables.

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