WO2011072593A1

WO2011072593A1 - Magnet holding relay with improved magnetic path structure

Info

Publication number: WO2011072593A1
Application number: PCT/CN2010/079708
Authority: WO
Inventors: 谭忠华
Original assignee: 厦门宏发电声股份有限公司
Priority date: 2009-12-17
Filing date: 2010-12-13
Publication date: 2011-06-23
Also published as: CN102103943A

Abstract

A magnet holding relay with an improved magnetic path structure comprises a magnetic path part. The magnetic path part comprises a U-shaped yoke (32), magnetic steel (35), an armature (33), a bobbin (31), and a winding (34). The armature is mounted at the outside of an opening of the yoke. A middle part of the armature is provided with a rotating shaft (331) capable of moving in a seesaw manner. The rotating shaft is disposed opposite a middle part between two arm ends of the yoke, thus two ends of the armature are alternately moved towards a corresponding end of the two ends of the yoke when the armature is moved in a seesaw manner. The magnetic steel is spliced at a surface of the armature towards the yoke, and positioned between two arm ends of the opening of the yoke without contacted with the two arm ends of the yoke. Magnetization direction of the magnetic steel is set to be in parallel with the two arms of the U-shaped yoke. Magnetic loops with different directions are correspondingly and alternately formed in the armature and the yoke when the two ends of the armature are alternately moved towards the yoke. The structure is a balanced type magnetic path, thus disadvantages of original unbalanced structure are prevented. The relay is simple in structure, and can be manufactured in an inexpensive manner.

Description

Magnetic retention relay with improved magnetic circuit structure

Technical field

The present invention relates to a magnetic holding relay, and more particularly to a structural improvement of a magnetic circuit.

Background technique

Since the magnetic holding relay does not need long-term power supply, it can effectively reduce the energy consumption of the relay coil, which is in line with the current development trend of environmental protection and energy saving, and is therefore a major direction for the development of relays.

The existing magnetic holding relay is an unbalanced magnetic holding relay, which usually includes a contact portion, a magnetic circuit portion, and a push block. The contact portion typically includes a normally closed static reed assembly, a normally open static reed assembly, and a movable reed assembly that are inserted into the base in a plug-in manner to form a stable, reliable contact portion. 1 is a schematic structural view of a conventional magnetic holding relay; FIG. 2 is a schematic exploded view of a conventional magnetic holding relay, and it can be seen from the figure that after the magnetic circuit portion is assembled, it is opened in a single direction along the lateral direction of the base. In the oral body, thereby increasing the creepage distance between the input end and the output end; FIG. 3 is an exploded view showing the structure of the magnetic circuit portion of the conventional magnetic holding relay; FIG. 4 is a schematic view showing the magnetic circuit portion of the conventional magnetic holding relay in a reset state; Fig. 5 is a view showing a state in which a magnetic circuit portion of a conventional magnetic holding relay is in a set state. The magnetic holding relay includes a contact portion, a magnetic circuit portion, a base 1', and a push block 2'. The contact portion typically includes a normally closed static reed assembly 41', a normally open static reed assembly 42' and a moving reed assembly 43' that are inserted into the base 1' in a plug-in manner to form a stable, reliable contact portion. The magnetic circuit portion generally includes a U-shaped yoke 32', a magnetic steel 35', a yoke 36', an armature 33', a compression spring 37', a bobbin 31' and a coil winding 34'; a U-shaped yoke in the magnetic circuit portion The iron is deformed by a large deformation at one end 321' to form a thinner magnetic pole, and the magnetic steel 35' is loaded into the flattened portion, and then the yoke 36' is loaded. In the reset state, the magnet 35' is placed at the flattened end of the yoke 32', and the yoke 36' and the yoke are flattened to sandwich the magnetic steel 35', and the armature 33' is at the root compression spring 37' Resilience is maintained in the reset position.

When the pulse flux 51' is applied in the magnetic circuit, the armature end 331' will move toward the yoke while driving the push block 2' to move. When the armature 33' is in contact with the yoke 32' under the action of the pulse magnetic force, the magnetic flux 52' of the magnetic steel 35' is looped through the yoke 36', the end of the armature 331', and the end 321' of the yoke to keep the armature 33' live. At this time, the armature 33' applies pressure to the push block 2' and transmits it to the movable spring, and holds the movable spring so that the set contact group (i.e., the normally open contact group) is turned on. When a reverse pulse magnetic field 53' is applied to the magnetic circuit, when the pulse magnetic flux 53' is equal to or larger than the magnetic steel flux 52', the armature 33' is in the double force of the moving reed reaction force and the restoring reed 37' Return to the reset state under the action. In this state, the reset contact group (ie, the normally closed contact group) remains in the ON state under the action of the reaction spring itself, and the magnetic steel 35' does not have any effect. The advantage of this structure is that the creepage distance and electrical distance between the output of the relay (ie, the contact group) and the input (ie, the coil) can reach the reinforced insulation level in the VDE standard. However, the existing magnetic holding relay structure is an unbalanced electromagnetic mechanism, and the set end is held by magnetic steel, so that the set contact group has a short rebound time, a large pressure between the contacts, and a long electrical life; Since the reset end has no magnetic steel action, the reset contact group (normally closed contact group) is naturally reset only by the mechanical elastic reaction force of the moving reed, so the return contact time of the reset contact group (normally closed contact group) is long. The pressure between the contacts is small, the electrical life is short, and the bonding failure is easy to occur. Under the same load conditions, the reset contact group (normally closed contact group) has a shorter life, and the set contact group (normally open contact group) has a long electrical life.

Summary of the invention

The object of the present invention is to overcome the deficiencies of the prior art and provide a magnetic holding relay of a new magnetic circuit, which adopts a novel balanced magnetic circuit structure to make a set of contact contacts (ie, a normally open contact group is connected). ), the reset contact group (that is, the normally closed contact group is turned on) is maintained by the magnetic force formed by the magnetic steel, and thus the mechanical parameters such as the contact group pressure and the rebound time of the set contact group and the reset contact group are basically Similarly, the switching capacity and electrical life level under the same load are basically the same, avoiding the drawbacks caused by the original inconsistency. The utility model has the advantages of simple structure, low manufacturing cost and being suitable for mass production.

The technical solution adopted by the present invention to solve the technical problem thereof is: a magnetic holding relay of a new magnetic circuit, comprising a contact portion, a magnetic circuit portion, a base and a pushing block; the magnetic circuit portion comprises a U-shaped yoke, a magnetic steel, an armature a coil bobbin and a coil winding; one arm of the U-shaped yoke passes through the hole of the bobbin, and the other arm of the U-shaped yoke is disposed outside the coil winding; the armature is mounted outside the mouth of the yoke, and the armature is The middle is provided with a rotating shaft capable of tilting the two ends thereof, and the rotating shaft is disposed at a middle position corresponding to the ends of the two arms of the yoke, so that both ends of the armature can be alternated when the armature performs the see-saw motion. Relying on a corresponding one of the two ends of the yoke; the magnet is placed on the side of the armature facing the yoke and is contained between the ends of the arms of the yoke mouth and not at the ends of the yoke The magnetic contact direction of the magnetic steel is parallel to the two arms of the U-shaped yoke, and when the two ends of the armature alternately lean toward the yoke, the magnetic circuits of different directions are alternately formed in the armature and the yoke.

A side of the armature facing the yoke is provided with a card slot, and the magnet is mounted in the card slot of the armature.

The armature is mounted on the bobbin, and the rotating shaft of the armature is a convex column-shaped structure, and the coil bobbin is provided with a first concavity capable of supporting the convex cylindrical structure of the armature.

The armature is mounted on the bobbin, and the rotating shaft of the armature is a card slot structure, and the coil bobbin is provided with a first convex arm capable of supporting the card slot structure of the armature.

The armature is mounted on the base, and the rotating shaft of the armature is a convex cylindrical structure, and the base is provided with a second concave ridge capable of supporting the convex cylindrical structure of the armature.

The armature is mounted on the base, the rotating shaft of the armature is a card slot structure, and the base is provided with a second convex arm capable of supporting the card slot structure of the armature.

The middle of the armature facing away from the yoke has a protrusion outward.

In the magnetic holding relay of the present invention, the ends of the U-shaped yoke do not need to be complicatedly flattened, and the end of one arm of the U-shaped yoke passes through the hole of the bobbin, that is, the arm is placed in the coil winding. The end of the arm constitutes a reset end of the U-shaped yoke; the other arm of the U-shaped yoke is placed outside the bobbin, that is, placed outside the coil winding, and the end of the arm constitutes a U-shaped yoke a side end; a side plate of the bobbin is placed at the open end of the U-shaped yoke; the armature is composed of the armature body and a plastic part fixing the armature body, and the armature body is processed with a card slot for mounting the magnetic steel, and the armature body passes The injection molding is embedded in a plastic to obtain an armature, and the shaft of the armature is made of a plastic part. Using the magnetic steel on the armature, after the armature is placed against the set end of the U-shaped yoke, the magnetic circuit formed by the magnetic steel, the yoke set end, and a part of the armature can generate magnetic force to keep the armature in the U-shaped yoke. After the armature is pressed against the reset end of the U-shaped yoke, the magnetic circuit formed by the magnetic steel, the yoke return end, and a part of the armature can generate a magnetic force to keep the armature at the reset end of the U-shaped yoke. .

The utility model has the beneficial effects that the armature is arranged outside the mouth of the yoke, and the rotating shaft is arranged in the middle of the armature to enable the two ends to perform the see-saw motion, and the rotating shaft is arranged on the two arms corresponding to the yoke The middle position between the ends, when the armature is subjected to the see-saw motion, the two ends of the armature can alternately abut against the corresponding one end of the yoke; the magnet is placed on the side of the armature facing the yoke, And is inserted between the ends of the two arms of the yoke mouth without contacting the ends of the two ends of the yoke; the magnetization direction of the magnet is parallel to the arms of the U-yoke, and can be at both ends of the armature When alternately leaning against the yoke, the magnetic circuits in different directions are alternately formed in the armature and the yoke. With this balanced magnetic circuit structure, the set contact group (the normally open contact group is turned on) and the reset contact group (the normally closed contact group are turned on) are maintained by the magnetic force formed by the magnetic steel, and thus The mechanical parameters such as the contact group pressure and the rebound time of the contact contact group and the reset contact group are basically the same, and the switching capability and the electrical life level under the same load are basically the same. Moreover, there is no contact group of magnetic steel and non-magnetic holding relay, which has stronger load capacity. At the same time, the structure is simple, the manufacturing cost is low, and it can be suitable for mass production.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, a magnetic holding relay of a new magnetic circuit of the present invention is not limited to the embodiment.

DRAWINGS

1 is a schematic view showing the overall structure of a conventional magnetic holding relay;

2 is a schematic exploded view showing the structure of a conventional magnetic holding relay;

3 is an exploded perspective view showing the structure of a magnetic circuit portion of a conventional magnetic holding relay;

4 is a schematic view showing a magnetic circuit portion of a conventional magnetic holding relay in a reset state;

5 is a schematic view showing a magnetic circuit portion of a conventional magnetic holding relay in a set state;

Figure 6 is a schematic view showing the overall structure of an embodiment of the present invention;

Figure 7 is a schematic exploded view showing the structure of the embodiment of the present invention;

Figure 8 is a schematic structural view of a magnetic circuit portion of an embodiment of the present invention;

Figure 9 is a schematic view showing a state of resetting a magnetic circuit portion of an embodiment of the present invention;

10 is a schematic view showing a state in which a magnetic circuit portion is set in an embodiment of the present invention;

11 is a schematic structural view of a magnetic circuit portion of another embodiment of the present invention;

12 is a schematic structural view of a magnetic circuit portion of still another embodiment of the present invention;

Figure 13 is a block diagram showing the structure of a magnetic circuit in accordance with still another embodiment of the present invention.

detailed description

Embodiment 1, referring to FIG. 6 to FIG. 10, a magnetic holding relay of a new magnetic circuit of the present invention includes a contact portion, a magnetic circuit portion, a base 1 and a push block 2; and the contact portion includes a normally closed static reed assembly 41. The normally open static reed assembly 42 and the movable reed assembly 43 are inserted into the socket of the base 1 in a plug-in manner to form a stable and reliable contact portion; the magnetic circuit portion includes a U-shaped yoke 32 and magnetic a steel 35, an armature 33, a bobbin 31 and a coil winding 34; one arm of the U-shaped yoke 32 passes through the hole of the bobbin 31, and the other arm of the U-shaped yoke 32 is disposed outside the coil winding 34; the armature 33 is mounted outside the mouth of the yoke 32, and a shaft 331 capable of causing both ends thereof to perform a see-saw motion is provided in the middle of the armature 33. The shaft 331 is disposed at a middle position corresponding to the end between the arms of the yoke 32. When the armature 33 performs the see-saw motion, both ends of the armature 33 can alternately abut against the corresponding one of the two ends of the yoke 32; the magnetic steel 35 is placed on the side of the armature 33 facing the yoke 32, and Between the ends of the two arms that are included in the mouth of the yoke 32 and not in contact with the ends of the arms of the yoke 32; the charge of the magnetic steel 35 When the direction of the arms of the U-shaped iron yoke 32 in parallel can be alternately toward both ends of the yoke 32 of the armature 33, the armature 33 alternately correspondence with the yoke 32 are formed in different directions in the magnetic circuit.

among them:

a side of the armature 33 facing the yoke is provided with a card slot, and the magnetic steel 35 is mounted in the card slot of the armature;

The armature 33 is mounted on the bobbin 31, and the rotating shaft 331 of the armature is a convex cylindrical structure. The coil bobbin 31 is provided with a first concave 臼 313 capable of supporting the convex cylindrical structure of the armature; the first concave 臼 313 has two, two The first recesses 313 are respectively disposed on the side plates 311 of the bobbin to respectively support the rotating shafts 331 on both sides of the armature, and also serve as a limiting position;

A middle portion of the armature 33 facing away from the yoke is provided with a protrusion 332. The protrusion 332 can effectively reduce the gap between the armature and the inner side of the outer casing without affecting the rotation of the armature 33, thereby improving the anti-drop of the relay. Impact ability

Both ends of the U-shaped yoke 32 do not need to be complicatedly flattened (in the prior art, one end of the U-shaped yoke is required to be flattened), which makes the processing of the U-shaped yoke easy. The end of one arm of the U-shaped yoke 32 passes through the hole of the bobbin, that is, the arm is placed in the coil winding 34, the end of the arm constitutes the reset end 321 of the U-shaped yoke; the other of the U1-shaped yoke 32 One arm is placed on the outer side of the bobbin 31, that is, placed on the outer side of the coil winding 34, and the end of the arm constitutes the set end 322 of the U-shaped yoke; one side plate 311 of the bobbin is placed on the U-shaped yoke 32. The armature 33 is composed of an armature body and a plastic part fixed to the armature body. The armature body is formed with a card slot for mounting magnetic steel. The armature body is inserted into the plastic by injection molding to obtain an armature, and the rotating shaft 331 of the armature is made of plastic parts. production. With the magnetic steel 35 on the armature 33, after the armature 33 abuts against the set end 322 of the U-shaped yoke, the magnetic circuit formed by the magnetic steel 35, the yoke set end 322, and a part of the armature 33 can generate magnetic force. The armature is held at the set end 322 of the U-shaped yoke; and after the armature 33 abuts against the reset end 321 of the U-shaped yoke, the magnetic circuit formed by the magnetic steel 35, the yoke return end 321, and a portion of the armature 33 can The magnetic force is generated to hold the armature 33 at the reset end 321 of the U-shaped yoke.

A magnetic holding relay of a new magnetic circuit of the present invention has a magnetic circuit structure of a balanced structure, and when the relay is in a reset state (the normally closed contact group is closed), the magnetic flux 51 of the magnetic steel 35 is reset by the U-shaped yoke The end 321 , the armature 33 and the air circuit form a magnetic flux circuit in one direction, and the armature 33 is held at the reset end 321 of the U-shaped yoke, that is, one end 333 of the armature 33 abuts against the reset end 321 of the U-shaped yoke, and simultaneously pushes the block. 2 Keep the moving reed in the reset state (the normally closed contact group is closed and the normally open contact group is open); when the pulse voltage is applied to the relay coil, a magnetic flux 51 direction is generated in the relay magnetic circuit. The opposite magnetic flux 52, when the pulse magnetic flux 52 is equivalent to the magnetic steel holding magnetic flux 51, the force received by the armature 33 at the reset end 321 is balanced, and the pulse magnetic flux 52 passes through the armature 33 and the other air gap 61 of the yoke. Forming a loop, generating electromagnetic attraction, so that the other end 334 of the armature rotates toward the U-shaped yoke setting end 322, and at the same time, the pushing block 2 drives the moving reed to move, so that the set contact group (normally open contact group) is closed and reset. Contact group (normally closed contact group) is disconnected; pulse After the pressure disappears, the magnetic flux 53 of the magnetic steel 35 passes through the set end 322 of the U-shaped yoke, the armature 33, and the air circuit to form a magnetic flux loop in the other direction, and the armature 33 is held at the set end 322 of the U-shaped yoke. That is, the other end 334 of the armature 33 abuts against the set end 322 of the U-shaped yoke, while pushing the block 2 to keep the moving reed in the set state (the normally open contact group is closed and the normally closed contact group is disconnected) .

If a relay reset is required, that is, when the relay needs to be set (the normally open contact group is closed) to the reset state (the normally closed contact group is closed), it is only necessary to apply a reverse pulse voltage to the coil of the relay. After the reverse direction pulse voltage is applied, a magnetic flux 54 opposite to the magnetic flux 53 at the set end is generated in the relay magnetic circuit, and the pulse magnetic flux 54 is equivalent to the holding magnetic flux 53 at the set end magnetic steel. When the armature 33 is balanced at the set end, the pulse flux 54 forms a loop through the armature and another air gap 62 of the yoke, generating an electromagnetic attraction, and the armature 33 is rotated toward the reset end 321 of the U-shaped yoke. At the same time, the block 2 drives the moving reed motion, so that the reset contact group (normally closed contact group) is closed, the set contact group (normally open contact group) is disconnected; after the pulse voltage disappears, the magnetic flux of the magnetic steel 35 is broken. 51 through the U-yoke yoke reset end 321, the armature 33, the air circuit to form a magnetic flux circuit, the armature 33 is held at the reset end 321 of the U-shaped yoke, while pushing the block 2 to maintain the moving reed in the reset state (normally open Contact group disconnected, normally closed contact set Close state).

In the above embodiment, the armature 33 is mounted on the bobbin 31. In another embodiment, as shown in FIG. 11, the armature 33 may be mounted on the base 1. At this time, it is required to be provided on the side plate of the base 1. The second recess 11 capable of supporting the cylindrical structure of the armature and the rotating shaft 331 of the armature are inserted into the second recess 11 of the base 1, so that the two ends of the armature can also be tilted.

12 is a magnetic circuit portion structure of another embodiment of the present invention, in which the rotation shaft of the armature 33 is changed to the card slot structure 335, and the first recess provided on the bobbin is changed to a card slot capable of supporting the armature. The first convex arm 314 of the structure, by the engagement of the latching structure 335 of the armature 33 with the first convex arm 314 of the bobbin, can also achieve the rotation of the armature about its rotation axis.

13 is a magnetic circuit portion structure of another embodiment of the present invention, in which the rotating shaft of the armature 33 is changed to the card slot structure 335, and the second recessed portion provided on the base 1 is changed to a card slot capable of supporting the armature. The second projecting arm 12 of the structure, by the engagement of the slot structure 335 of the armature 33 with the second projecting arm 12 of the base, can also achieve the rotation of the armature about its axis of rotation.

The above embodiment is only used to further explain a magnetic holding relay of a new magnetic circuit of the present invention, but the present invention is not limited to the embodiment, and any simple modification or equivalent change made to the above embodiment according to the technical essence of the present invention is provided. And the modifications are all within the scope of protection of the technical solutions of the present invention.

Industrial applicability

The invention adopts the armature to be mounted outside the mouth of the yoke, and the middle of the armature is provided with a rotating shaft capable of causing the two ends to perform the see-saw motion, so that the two ends of the armature can be alternated when the armature performs the see-saw motion. Relying on a corresponding one of the two ends of the yoke; the magnet is placed on the side of the armature facing the yoke and is contained between the ends of the arms of the yoke mouth and not at the ends of the yoke The magnetic contact direction of the magnetic steel is parallel to the two arms of the U-shaped yoke, and when the two ends of the armature alternately lean toward the yoke, the magnetic circuits of different directions are alternately formed in the armature and the yoke. With this balanced magnetic circuit structure, the set contact group (the normally open contact group is turned on) and the reset contact group (the normally closed contact group are turned on) are maintained by the magnetic force formed by the magnetic steel, and thus The mechanical parameters such as the contact group pressure and the rebound time of the contact contact group and the reset contact group are basically the same, and the switching capability and the electrical life level under the same load are basically the same. Moreover, there is no contact group of magnetic steel and non-magnetic holding relay, which has stronger load capacity. At the same time, the structure is simple, the manufacturing cost is low, and it can be suitable for mass production.

Claims

A magnetic retention relay with improved magnetic circuit structure, comprising a contact portion, a magnetic circuit portion, a base and a push block; the magnetic circuit portion comprises a U-shaped yoke, a magnetic steel, an armature, a coil bobbin and a coil winding; and a U-shaped yoke One arm passes through the hole of the bobbin, and the other arm of the U-shaped yoke is disposed outside the coil winding; the armature is mounted outside the mouth of the yoke, and the middle of the armature is provided at both ends thereof a rotating shaft for the see-saw motion, the rotating shaft is disposed at a middle position corresponding to the ends of the two arms of the yoke, so that both ends of the armature can alternately lean toward the ends of the yoke when the armature performs the see-saw motion Corresponding to one end; the magnetic steel is mounted on one side of the armature facing the yoke and is contained between the ends of the two ends of the yoke mouth without contacting the ends of the two ends of the yoke; the charging of the magnetic steel The magnetic direction is parallel to the arms of the U-shaped yoke, and when the ends of the armature are alternately turned toward the yoke, the magnetic circuits in different directions are alternately formed in the armature and the yoke.
A magnetic retention relay with improved magnetic circuit structure according to claim 1, wherein a surface of the armature facing the yoke is provided with a card slot, and the magnetic steel is mounted in the card slot of the armature.
A magnetic retention relay with improved magnetic circuit structure according to claim 1, wherein the armature is mounted on the bobbin, and the rotating shaft of the armature is a convex cylindrical structure, and the bobbin is provided with a convex body capable of supporting the armature. The first recess of the cylindrical structure.
A magnetic retention relay with improved magnetic circuit structure according to claim 1, wherein the armature is mounted on the bobbin, and the rotating shaft of the armature is a card slot structure, and the coil frame is provided with a card slot capable of supporting the armature. The first convex arm of the structure.
A magnetic retention relay with improved magnetic circuit structure according to claim 1, wherein the armature is mounted on the base, the rotation axis of the armature is a convex column structure, and the base is provided with a convex column shape capable of supporting the armature. The second recess of the structure.
A magnetic retention relay with improved magnetic circuit structure according to claim 1, wherein the armature is mounted on the base, the rotating shaft of the armature is a card slot structure, and the base is provided with a card slot structure capable of supporting the armature. Second convex arm.
A magnetic retention relay with improved magnetic circuit structure according to claim 1, wherein a central portion of the armature facing away from the yoke is outwardly provided with a projection.