WO2024179607A1

WO2024179607A1 - Multi-contact movable reed and electromagnetic relay

Info

Publication number: WO2024179607A1
Application number: PCT/CN2024/079979
Authority: WO
Inventors: 代文广; 廖国进
Original assignee: 厦门宏发电力电器有限公司
Priority date: 2023-03-02
Filing date: 2024-03-04
Publication date: 2024-09-06

Abstract

A multi-contact movable reed, comprising a body which is provided with two opposite surfaces, two opposite ends in the length direction of the body, and two opposite sides in the width direction thereof, wherein the part of the body close to a first end is a root; the body is provided with at least one slit in the length direction to form at least two swinging members capable of freely swinging relative to the root of the body; and a movable contact is fixed to the position of one surface of each swinging member close to a free end of the swinging member. The free end of at least one swinging member is provided with an extension portion, which extends in a direction away from the movable contact. A connecting piece is fixed to at least one swinging member, and the connecting piece comprises a piece body and an elastic arm extending in the width direction of the body of the moving reed, wherein the elastic arm abuts against the swinging member other than the swinging member to which the connecting piece is fixed; and by adjusting the value of pressure applied to the swinging member by the elastic arm, a contact gap between the movable contact on the swinging member and a corresponding fixed contact is adjusted.

Description

Multi-contact moving reed and electromagnetic relay

The present disclosure claims priority to Chinese patent applications with application numbers 202310192957.X, 202310192963.5 and 202320370442.X filed on March 2, 2023, the entire contents of which are incorporated herein by reference in their entirety.

Technical Field

The present disclosure relates to the technical field of relays, and in particular to a multi-contact moving reed and an electromagnetic relay.

Background Art

A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit. Relays are heat-sensitive components. When the temperature exceeds the tolerable temperature, the aging of the internal plastic and insulating materials of the relay will be accelerated, causing the contacts to be oxidized and corroded, making it difficult to extinguish the arc, the technical parameters of the electrical components to decay, and the reliability to decrease.

In order to reduce the temperature rise of the contact resistance, a relay with a multi-way contact structure in the prior art has a movable spring component including a movable contact, a movable spring sheet and a movable spring lead-out sheet; the movable spring sheet has a first end and a second end, the first end of the movable spring sheet is connected to one end of the movable spring lead-out sheet, and the second end of the movable spring sheet is fixedly connected to the movable contact. Two slits are provided on the movable spring sheet extending from the second end to the first end (the end connected to the movable spring lead-out sheet) to divide the movable spring sheet into three current-carrying conductors; there are three movable contacts, which are respectively fixed on the corresponding current-carrying conductors, thereby dividing the movable spring sheet into a three-way parallel structure. This structure designs the contact component into a multi-group contact parallel structure, so that the current passing through each current-carrying conductor is reduced, thereby reducing the temperature rise.

In order to ensure that the gaps between multiple contacts are consistent when the moving and static contacts are disconnected and to reduce the fluctuation of the gaps between multiple contacts caused by the tilt of the push card, the movable spring piece of the prior art is equipped with a connecting piece on the side facing the static contact, and the connecting piece is connected between each moving contact. This setting completely fixes the connecting piece to the three moving contacts. Although it can maintain the consistency of the gaps between each contact, it cannot be adjusted and cannot meet the use requirements under certain conditions. Therefore, how to keep the gaps between each contact consistent and adjust the gaps when necessary has become an urgent problem to be solved.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-contact moving spring and an electromagnetic relay. By improving the structure, the elastic arm of the connecting piece abuts against the adjacent swinging piece. When the elastic arm does not apply pressure to the swinging piece, the gaps between the various contacts can remain consistent. The contact gap between the moving contact on the swinging piece and the corresponding static contact can be adjusted by adjusting the force applied to the swinging piece by the elastic arm.

According to one aspect of the present disclosure, a multi-contact moving spring comprises a body; the body has opposite The first surface and the second surface have opposite first and second ends along the length direction thereof and opposite sides along the width direction thereof. The part of the body near the first end is the root. The body is provided with at least one slit, which extends from the root of the body to the second end direction, so that the body forms at least two swinging members that can swing freely relative to the root. A moving contact is fixed at the first surface or the second surface of each swinging member near the free end position of the swinging member. The free end of one of the at least two swinging members is provided with an extension extending in a direction away from the moving contact, and the extension is used to cooperate with the card slot of the push card. A connecting piece is fixed on one of the at least two swinging members, and the connecting piece includes a sheet body and an elastic arm extending along the width direction of the body of the moving spring sheet. The elastic arm abuts against the remaining swinging members except the swinging member that fixes the connecting piece. The contact gap between the moving contact on the swinging member and the corresponding static contact is adjusted by adjusting the pressure value applied by the elastic arm to the swinging member.

According to an embodiment of the present disclosure, there are an odd number of swinging members, the extension portion is provided on the middle swinging member among the plurality of swinging members, and the connecting piece has two elastic arms respectively abutting against the swinging members on both sides.

According to an embodiment of the present disclosure, flange structures are respectively provided on both sides of the extension portion, so as to utilize the flange structures to reduce scraping caused by the friction between the movable spring sheet and the push card.

According to an embodiment of the present disclosure, the body of the connecting sheet is fixed to the surface of the swinging member provided with the extending portion.

According to an embodiment of the present disclosure, the sheet body of the connecting sheet extends from the root of the main body toward the second end of the main body until it is flush with the extending portion.

According to an embodiment of the present disclosure, a bend is provided at the end of the sheet body of the connecting sheet.

According to an embodiment of the present disclosure, a bending portion is provided on the body of the connecting sheet, and the bending portion is between the moving contact and the bend.

According to an embodiment of the present disclosure, the elastic arm of the connecting piece has at least one pair of V-shaped portions with opposite opening directions, and the planar shape of the V-shaped portions after unfolding is a trapezoid.

According to one embodiment of the present disclosure, the main body is composed of multiple spring sheets stacked together, and the swinging member is composed of multiple spring sheets stacked together; the flange structure is arranged on an outer spring sheet, and the flange structures on both sides are respectively bent toward adjacent spring sheets, and the two side edges of the adjacent spring sheets are respectively provided with a yield structure.

According to one embodiment of the present disclosure, the moving contact on the swinging piece fixed with the connecting piece and the moving contacts on the other swinging pieces are staggered in the length direction of the main body, and the moving contact on the swinging piece fixed with the connecting piece is larger than the moving contacts on the other swinging pieces, and the width of the swinging piece fixed with the connecting piece is larger than the width of the other swinging pieces.

According to an embodiment of the present disclosure, there are two swinging members, the extension portion is provided on one of the swinging members, the connecting piece has an elastic arm, and the elastic arm extends toward the other swinging member and abuts against the other swinging member.

According to another aspect of the present disclosure, an electromagnetic relay includes the multi-contact moving reed described in the present disclosure.

Compared with the prior art, the beneficial effects of the present disclosure are:

1. In the present disclosure, one of the swinging members is provided with an extension for cooperating with the card slot of the push card, and a connecting piece is fixed on one of the swinging members, and the elastic arm of the connecting piece abuts against the adjacent swinging member. In the structure of the present disclosure, the connecting piece can drive the other swinging members to move when the push card pushes one of the swinging members to swing, avoiding the difference in the gaps between the contact points caused by the skewness of the push card, and thus ensuring the consistency of the gaps between the contact points; and when necessary, the contact gap between the moving contact on the swinging member and the corresponding static contact can be adjusted by adjusting the pressure applied by the elastic arm to the swinging member, that is, the contact gaps can also be adjusted according to actual needs to make them inconsistent. At the same time, in actual use, after the moving and static contacts are disconnected, only the contact gap (minimum gap) between the moving contact on the swinging member fixed with the connecting piece and the corresponding static contact needs to be measured, and the contact gap between the moving contact on the swinging member without the connecting piece fixed with the corresponding static contact does not need to be measured, which can further simplify the process control points.

2. In the present disclosure, flange structures are provided on both sides of the extension portion. In the present disclosure, the flange structure of the movable spring piece contacts the push card, which reduces the friction between the movable spring piece and the push card when the movable spring piece swings, thereby reducing the generation of scraps.

3. In the present disclosure, the connecting sheet extends to be flush with the end of the extending portion, and is provided with a bend at its end. This structure of the present disclosure can limit the push card to prevent the push card from being disengaged.

4. In the present disclosure, the connecting sheet is provided with a bending portion. This structure of the present disclosure reduces the rigidity of the connecting sheet and can prevent permanent deformation after long-term exercise.

5. In the present disclosure, the elastic arm of the connecting piece is provided with at least two V-shaped portions, and the opening directions of the at least two V-shaped portions are opposite; the plane shape of each V-shaped portion after being unfolded is a trapezoid. This structure of the present disclosure allows the arc line of the V-shaped portion at the end of the elastic arm to abut against the swinging member, reducing the friction between the two. And because the plane shape of the V-shaped portion after being unfolded is a trapezoid, the deformation position of the elastic arm occurs near the contact position with the swinging member, the root of the elastic arm is less deformed, and pressure can be applied more reliably.

6. In the present disclosure, the moving contacts on the swinging member with the connection sheet fixed thereto and the moving contacts on the remaining swinging members are staggered in the length direction of the moving spring, and the moving contacts on the swinging member with the connection sheet fixed thereto are larger than the moving contacts on the remaining swinging members, and the width of the swinging member with the connection sheet fixed thereto is larger than the width of the remaining swinging members. In the structure of the present disclosure, the swinging member with the connection sheet fixed thereto has the widest width and the moving contacts on it are the largest, ensuring that the most current flows through it. And because of its large width, it is difficult to deform, so the deformation of the swinging piece with the connecting piece fixed is small. In applications where the gaps between the contact points are inconsistent, the gap difference control between the contact gaps is more reliable. At the same time, because the elastic arm of the connecting piece presses the remaining swinging pieces, these swinging pieces are kept away from the swinging piece with the connecting piece fixed. Therefore, the contact gap between the moving contact on the swinging piece with the connecting piece fixed and the corresponding static contact is smaller than the contact gap between the moving contact and the corresponding static contact on the remaining swinging piece. When multiple closed moving and static contacts are disconnected, the moving contacts on the remaining swinging pieces are separated from the corresponding static contacts first, and the moving contacts on the swinging piece with the connecting piece fixed and the corresponding static contacts are separated later. In this way, when multiple moving and static contacts are instantly disconnected, an arc is generated only between the moving contact and the static contact on the swinging piece with the connecting piece fixed, while the moving contacts and the static contacts on the remaining swinging pieces are separated. No arc is generated between the static contacts, which helps to reduce the temperature rise of the resistor, thereby reducing the temperature rise of the relay and extending its service life.

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-contact moving spring and an electromagnetic relay. By improving the structure, the two sides of the connecting piece are respectively extended to the two sides and elastically pressed against the two swinging pieces on the two sides. While maintaining the consistency of the contact gap, the gap difference between the middle contact and the contacts on the two sides can be adjusted by adjusting the height difference between the two ends of the connecting piece and the two swinging pieces on the two sides.

The technical solution adopted by the present disclosure to solve the above technical problems is: a multi-contact moving spring, including a moving spring body; the moving spring body is provided with at least one slit from the root upwards, so that the moving spring body forms at least two swinging members that can swing freely relative to the root, and one side of the free end of each swinging member is respectively fixed with a moving contact; one of the swinging members among the swinging members is provided with an extension portion for cooperating with a card slot of a push card from the connection point of the moving contact upwards, and a connecting piece is also fixedly connected to the moving contact of one of the swinging members, and the connecting piece extends to the side and elastically presses against the adjacent swinging member, so as to adjust the gap difference between the contact of one of the swinging members and the adjacent contact by adjusting the height difference between the swinging member fixed with the connecting piece and the adjacent swinging member.

According to one embodiment of the present disclosure, the swinging members are an odd number, the extension portion is arranged in the middlemost swinging member among the swinging members, and the two sides of the connecting piece extend to both sides respectively and elastically press against the swinging members on both sides, so as to adjust the gap difference between the middle contact and the contacts on both sides by adjusting the height difference between the middlemost swinging member and the swinging members on both sides.

According to an embodiment of the present disclosure, flange structures are respectively provided on both sides of the extension portion of one of the swinging members, so as to utilize the bending of the flange structures to reduce the generation of scraps due to the friction between the moving spring and the push card.

According to an embodiment of the present disclosure, the connecting piece is fixed to one side of one of the swinging members.

According to an embodiment of the present disclosure, the connecting piece extends upward to be flush with the extending portion, and a bend is provided at the end thereof.

According to an embodiment of the present disclosure, a U-shaped bend is provided in the connecting piece between the connection with the middle moving contact and the end.

According to one embodiment of the present disclosure, in the connecting piece, at least one double V-shaped bend is provided in the matching section with the adjacent swinging member, and the two V-shaped bends in each of the at least one double V-shaped bend are arranged in opposite directions, and the V-shaped bend close to the swinging member elastically presses against the corresponding swinging member; the unfolding plane of the double V-shaped bend is a trapezoidal setting.

According to one embodiment of the present disclosure, the movable reed body is composed of multiple reeds stacked together; the flange structure is provided on a first reed corresponding to one of the sides of the free end of the swinging member, which is close to the outside, and the flange structures on both sides are respectively bent toward the second reed, and the two side edges of the second reed are respectively provided with a yield structure.

According to one embodiment of the present disclosure, the moving contact of one of the swinging members is staggered with the moving contact of the adjacent swinging member, and the moving contact of one of the swinging members is larger than the moving contact of the adjacent swinging member, and the reed width of one of the swinging members is larger than the reed width of the adjacent swinging member.

The electromagnetic relay disclosed in the present invention comprises the multi-contact moving reed as described in the present invention.

1. In the present disclosure, one of the swinging members is provided with a movable contact point upwardly connected to the pusher. The card slot is matched with an extension part, and a connecting piece is fixedly connected to the moving contact of one of the swinging pieces, and the connecting piece extends to the side and elastically presses against the adjacent swinging piece. The structure disclosed in the present invention drives the other swinging pieces to move when the card pushes one of the swinging pieces, thereby avoiding the gap difference caused by the skew of the pushing card; and the gap difference between the contact of one of the swinging pieces and the adjacent contact can be adjusted by adjusting the height difference between the swinging piece fixed with the connecting piece and the adjacent swinging piece, so that the contact gap consistency can be maintained, and the gap difference can also be adjusted according to actual needs.

2. In the present disclosure, the two sides of the extension of one of the swinging members are provided with flange structures. This structure of the present disclosure utilizes the bending of the flange structure of the moving spring to contact the push card, reducing the friction between the moving spring and the push card when swinging, thereby reducing the generation of scraps.

3. In the present disclosure, the connecting piece extends upward to be flush with the extension portion, and a bend is provided at the end thereof. This structure of the present disclosure can limit the push card to prevent the push card from being disengaged.

4. In the present disclosure, a U-shaped bend is provided between the connection with the middle moving contact and the end of the connecting piece. This structure of the present disclosure reduces the rigidity of the connecting piece, prevents permanent deformation after long-term movement, and ensures the maintenance of the gap difference.

5. In the present disclosure, in the connecting piece, at least one double V-shaped bend is provided in the matching section with the adjacent swinging member, and the two V-shaped bends in each double V-shaped bend of the at least one double V-shaped bend are arranged in opposite directions, and the V-shaped bend close to the swinging member elastically presses against the corresponding swinging member; the unfolding plane of the double V-shaped bend is arranged in a trapezoidal shape. This structure of the present disclosure makes the contact point an arc line contact, reduces the friction between them, and makes the contact point more stable. And because the unfolding plane of the V-shaped bend is arranged in a trapezoidal shape, it is ensured that the deformation position occurs at the contact position, the deformation of the root is small, and the displacement of the middle contact can be transmitted more reliably.

6. In the present disclosure, the moving contact of one of the swinging members is staggered with the moving contact of the adjacent swinging member, and the moving contact of one of the swinging members is larger than the moving contact of the adjacent swinging member, and the width of the reed of one of the swinging members is larger than the width of the reed of the adjacent swinging member. In the structure of the present disclosure, the moving contact of one of the swinging members is the largest, and the corresponding slot width is the largest to ensure that the maximum current flows through it. And because the large width is difficult to deform, the deformation of the reed of one of the swinging members is small, which indirectly minimizes the contact gap, so that the arcing during the life process occurs on the large contact with the smallest gap, ensuring the life reliability.

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a connection structure between a moving reed and a push card and an electromagnetic relay. On the one hand, by arranging a flange structure on the first reed, the generation of scraps in the width direction of the moving reed and the push card when the moving reed swings is reduced. On the other hand, the push card is only in contact with the first reed, which reduces the generation of scraps in the thickness direction of the moving reed and the push card when the moving reed swings.

The technical solution adopted by the present disclosure to solve the above technical problems is: a connection structure between a moving spring and a push card, comprising a moving spring and a push card; the moving spring is provided with at least one slit from the root upwards, so that the moving spring forms at least two swinging members that can swing freely relative to the root, and one side of the free end of each swinging member is fixed with a moving contact; the ends of each swinging member are respectively provided with an extension upwards from the connection point of the moving contact, and the push card is provided with at least two card slots penetrating the thickness direction side by side; the extensions of each swinging member are respectively fitted in the corresponding card slots; the swing The two side edges of the extension part of one of the swinging parts are respectively provided with a flange structure, and the distance between the flange structure of the extension part of one of the swinging parts and the corresponding side groove wall of the corresponding card slot is smaller than the distance between the side edge of the extension part of the adjacent swinging part and the corresponding side groove wall of the corresponding card slot, so as to utilize the bending of the flange structure of the movable spring sheet to contact with the pushing card, thereby reducing the generation of scraping in the width direction between the movable spring sheet and the pushing card when the movable spring sheet swings.

According to an embodiment of the present disclosure, the number of the swinging members is an odd number, and the flange structure is provided on the middlemost swinging member among the swinging members.

According to one embodiment of the present disclosure, the sum of the distances between the two side flange structures of the extension portion of one of the swinging members and the corresponding side groove walls of the corresponding slot is smaller than the distance between the side edges of the extension portion of the adjacent swinging member and the corresponding side groove walls of the corresponding slot.

According to an embodiment of the present disclosure, the movable spring is composed of multiple springs stacked together; and the flange structure is provided on one of the springs.

According to an embodiment of the present disclosure, the flange structure is provided on a first spring leaf corresponding to one side of the free end of the swinging member on the outer side, and the flange structures on both sides are respectively bent toward the second spring leaf, and the two side edges of the second spring leaf are respectively provided with a yield structure.

According to one embodiment of the present disclosure, each reed of each swinging member is respectively provided with a shoulder at a position close to the extension portion of the main body, and the shoulder of one of the reeds is arranged higher, so that when the movable reed is in action, only one of the reeds is in contact with the pushing card in the thickness direction of the pushing card, thereby reducing the generation of scraps in the thickness direction between the movable reed and the pushing card when the movable reed swings.

According to an embodiment of the present disclosure, the movable reed is composed of four reeds stacked together; wherein the first reed, the second reed and the third reed are respectively provided with an extension portion, and the fourth reed is not provided with an extension portion.

According to one embodiment of the present disclosure, the first reed, the second reed and the third reed of each swinging member are respectively provided with shoulders at positions close to the extension portion of the main body, and the shoulders of the first reed are higher than the shoulders of the second reed and the third reed, so that when the movable reed is in action, only the first reed is in contact with the pushing card in the thickness direction of the pushing card, thereby reducing the generation of scraps in the thickness direction of the pushing card when the movable reed swings.

According to an embodiment of the present disclosure, the first reed, the second reed and the third reed of each swing member are bent into a U-shape between the moving contact connection and the root, and the U-shaped opening faces away from the moving contact connection.

The electromagnetic relay disclosed in the present invention comprises the connection structure between the movable spring piece and the push card described in the present invention.

1. In the present disclosure, both sides of the extension of one of the swinging members are provided with flange structures, and the distance between the flange structure of the extension of one of the swinging members and the corresponding side groove wall of the corresponding slot is smaller than the distance between the side of the extension of the adjacent swinging member and the corresponding side groove wall of the corresponding slot. This structure of the present disclosure utilizes the bending of the flange structure of the movable spring to contact the push card, thereby reducing the generation of scraps in the width direction of the movable spring and the push card when the movable spring swings.

2. In the present disclosure, the first reed, the second reed and the third reed of the three swinging members are respectively provided with shoulders at positions close to the extension portion of the body, and the shoulder of the first reed is higher than the shoulders of the second reed and the third reed. This structure ensures that when the movable reed is in action, only the first reed is in contact with the push card in the thickness direction of the push card, thereby reducing the generation of scraps in the thickness direction of the push card when the movable reed swings.

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a three-contact gap differential reed and electromagnetic relay, by providing ribs on the two swinging parts on both sides, without providing any in the middle, to ensure that the middle contact gap is smaller than the contact gap on both sides, to ensure the effect of the gap difference between the three contacts.

The technical solution adopted by the present disclosure to solve the above technical problems is: a multi-contact gap differential spring, including a moving spring body; the moving spring body is provided with at least one slit from the root upwards, so that the moving spring body forms at least two swinging members that can swing freely relative to the root, and one side of the free end of each swinging member is respectively fixed with a moving contact; one of the at least two swinging members is provided with an extension portion for matching with a card slot of a push card from the connection point of the moving contact upwards, and some of the at least two swinging members are also provided with ribs between the connection point of the moving contact and the root, so as to utilize the ribs to improve the rigidity of the swinging member and ensure the gap difference between the moving contacts.

According to an embodiment of the present disclosure, the number of the swinging members is odd, and the extension portion is provided on the middlemost swinging member among the swinging members.

According to one embodiment of the present disclosure, the ribs are long strips.

According to one embodiment of the present disclosure, the rib is located in the middle of the width of the corresponding swinging member.

According to an embodiment of the present disclosure, the rib is formed by making one side of the swinging member concave and making the other side convex, and the protrusion faces away from the side connected to the moving contact.

According to one embodiment of the present disclosure, a compression spring is connected to a side of the at least two swinging members that is away from the moving contact, the root of the compression spring is respectively fixed at each moving contact fixing position of the swinging member, and the end of the compression spring is forked into at least two pieces, which respectively extend to the corresponding card slots of the push card.

According to an embodiment of the present disclosure, the moving contact of at least one of the swing members is staggered with the moving contact of an adjacent swing member, and the moving contact of the at least one swing member is larger than the adjacent moving contact.

The electromagnetic relay disclosed in the present invention comprises the multi-contact gap differential reed described in the present invention.

1. In the present disclosure, one of the at least two swinging members is provided with an extension portion extending upward from the connection point of the moving contact to cooperate with the card slot of the push card, and some of the at least two swinging members are also provided with ribs between the connection point of the moving contact and the root, so as to utilize the ribs to improve the rigidity of the swinging member and ensure the gap difference between the moving contacts. In this structure of the present disclosure, the ribs can improve the rigidity of some of the swinging members. The stronger the rigidity of the spring leaf, the smaller the deformation, which is reflected in the larger gap between the moving and static contacts. The ribs are provided on the moving spring leaf of some of the swinging members, so that the rigidity of the moving spring leaf is improved. At the same stroke, the contact gap of the spring leaf of some of the swinging members is larger than the contact gap of one of the swinging members due to its greater rigidity. The effect of the gap difference between multiple contacts is ensured, and by setting the gap difference between the contacts, in actual use, only the contacts with the minimum gap without ribs need to be measured, and the contacts with ribs do not need to be measured, which can further simplify the process control points.

2. In the present disclosure, the two sides of the extension of one of the swinging members are respectively provided with flange structures, so as to reduce the generation of scraps by the friction between the moving spring and the push card by the bending of the flange structure. This structure of the present disclosure utilizes the bending of the flange structure of the moving spring to contact the push card, thereby reducing the friction between the moving spring and the push card when swinging, thereby reducing the generation of scraps.

3. In the present disclosure, a compression spring is connected to the side of the three swinging members away from the moving contact, the root of the compression spring is respectively fixed to the three moving contact fixing places of the swinging member, and the end of the compression spring is three forked pieces, which respectively extend to the corresponding card slots of the push card. This structure of the present disclosure does not require auxiliary positioning, reduces the use of parts, and reduces the cost.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

FIG1 is a schematic diagram of the three-dimensional structure of an embodiment of a three-contact moving spring according to the first embodiment of the present disclosure.

FIG. 2 is a front view of an embodiment of a three-contact moving spring of the first embodiment of the present disclosure.

FIG. 3 is a side view of an embodiment of a three-contact moving spring according to the first embodiment of the present disclosure.

FIG. 4 is an enlarged schematic diagram of point A in FIG. 3 .

FIG5 is a schematic diagram of current carrying of the three-contact moving spring of the first embodiment of the present disclosure.

FIG. 6 is a schematic diagram of a partial structure of an embodiment of an electromagnetic relay of the present disclosure.

FIG. 7 is a schematic diagram of the three-dimensional structure of an embodiment of two-contact movable springs according to the second embodiment of the present disclosure.

FIG. 8 is a top view of an embodiment of two contact movable springs of the second embodiment of the present disclosure.

FIG. 9 is a side view of an embodiment of two contact movable springs of the second embodiment of the present disclosure.

FIG. 10 is a schematic diagram of the three-dimensional structure of an embodiment of a five-contact moving spring of the third embodiment of the present disclosure.

FIG. 11 is a top view of an embodiment of a five-contact moving spring of the third embodiment of the present disclosure.

FIG. 12 is a side view of an embodiment of a five-contact moving spring of the third embodiment of the present disclosure.

FIG. 13 is a front view of the connection structure between the movable spring and the push card of the fourth embodiment of the present disclosure.

FIG. 14 is an enlarged schematic diagram of point B in FIG. 13 .

FIG. 15 is a side view of the connection structure between the movable spring and the push card of the fourth embodiment of the present disclosure.

FIG. 16 is an enlarged schematic diagram of point C in FIG. 3 .

FIG. 17 is a schematic diagram of the partial structure of the electromagnetic relay according to the fourth embodiment of the present disclosure.

FIG. 18 is a schematic diagram of the three-dimensional structure of the connection structure between the movable spring and the push card of the fifth embodiment of the present disclosure.

FIG. 19 is a front view of the connection structure between the movable spring and the push card of the fifth embodiment of the present disclosure.

FIG. 20 is a schematic diagram of the three-dimensional structure of the connection structure between the movable spring and the push card of the sixth embodiment of the present disclosure.

FIG. 21 is a front view of the connection structure between the movable spring and the push card of the sixth embodiment of the present disclosure.

FIG. 22 is a schematic diagram of the three-dimensional structure of the three-contact moving spring of the seventh embodiment of the present disclosure (with the ribs facing upward).

FIG. 23 is a front view of the three-contact moving spring of the seventh embodiment of the present disclosure.

FIG. 24 is a top view of the three-contact moving spring of the seventh embodiment of the present disclosure.

FIG. 25 is a schematic diagram of the three-dimensional structure of the three-contact moving spring of the seventh embodiment of the present disclosure (the U-shaped portion faces upward).

FIG. 26 is an enlarged schematic diagram of point D in FIG. 25 .

FIG. 27 is a schematic diagram of the partial structure of the electromagnetic relay of the seventh embodiment of the present disclosure.

FIG. 28 is a schematic diagram of the three-dimensional structure of the two-contact moving springs of the eighth embodiment of the present disclosure (with the ribs facing upward).

FIG. 29 is a top view of the two contact moving springs of the eighth embodiment of the present disclosure.

FIG30 is a schematic diagram of the three-dimensional structure of the five-contact moving spring of the ninth embodiment of the present disclosure (with the ribs facing upward).

FIG. 31 is a top view of the five-contact moving spring of the ninth embodiment of the present disclosure.

DETAILED DESCRIPTION

Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as "above" and "below" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the accompanying drawings. It is understood that if the device of the illustration is flipped so that it is upside down, the component described as being "above" will become the component "below". Other relative terms, such as "top", "bottom", etc., are also used to have similar meanings. When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a", "an", "the" and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements/components/etc. may exist in addition to the listed elements/components/etc.; the terms "first", "second", etc. are used merely as labels and are not intended to limit the quantity of their objects.

Embodiment 1

The multi-contact moving spring of the present disclosure comprises a body, an extension portion and a connecting piece. The body has opposite first and second surfaces, opposite first and second ends along its length direction, and opposite two sides along its width direction. The portion of the body close to the first end is a root. The body is provided with at least one slit, which extends from the root of the body toward the second end, so that the body forms at least two swinging members that can swing freely relative to the root. A moving contact is fixed on the first surface or the second surface of each swinging member near the free end of the swinging member.

The extension part is fixed to the free end of one of the at least two swinging parts, and the extension part extends from the free end of the swinging part in a direction away from the moving contact point. The extension part is used to cooperate with the card slot of the push card.

The connecting piece is fixed on one of the at least two swinging pieces, and the connecting piece includes a piece The movable spring sheet has a body and an elastic arm extending in the width direction of the body of the movable spring sheet, wherein the elastic arm abuts against the remaining swinging parts except the swinging part fixing the connecting piece, and the contact gap between the moving contact and the corresponding static contact on the swinging part is adjusted by adjusting the pressure value applied by the elastic arm to the swinging part.

Referring to FIGS. 1 to 5 , the first embodiment of the multi-contact movable spring of the present disclosure is a three-contact movable spring. The three-contact movable spring of the first embodiment comprises a body 1a, an extension 121a and a connecting piece 4a. The body 1a has opposite first and second surfaces, opposite first and second ends along its length direction L, and opposite sides along its width direction W. The portion of the body 1a close to the first end is a root 10a.

The body 1a has two slits from the root 10a to the second end of the body 1a, so that the body 1a forms three swinging members 11a, 12a, 13a that can swing freely relative to the root 10a. The first surfaces of the three swinging members near the free ends are respectively fixed with moving contacts, namely moving contacts 31a, 32a, 33a.

The extension part 121a is fixed to the free end of the middle swinging member 12a among the three swinging members, and the extension part 121a extends from the free end of the swinging member 12 in a direction away from the movable contact 32a. The extension part 121a is used to cooperate with the card slot of the push card 2a (see Figure 6).

The connecting piece 4a is fixed on the middle swinging member 12a. In one embodiment, the connecting piece 4a can be fixed together with the moving contact 32a, that is, the fixing point of the connecting piece 4a on the swinging member 12a is the same as the fixing point of the moving contact 32a on the swinging member 12a. In one embodiment, flange structures 122a are respectively provided on both sides of the extension portion 121a to reduce scraping caused by friction between the moving spring and the push card 2a.

The connecting piece 4a includes a sheet body 40a and an elastic arm 47a, and the elastic arm 47a extends from one side of the sheet body 40a along the width direction W of the main body 1a of the movable spring sheet. In the first embodiment, the connecting piece 4a has two elastic arms 47a, and the two elastic arms 47a extend in opposite directions and respectively abut against the swinging members 11a and 13a. Under the pressure of the two elastic arms 47a, the two swing members 11a, 13a can move a distance s relative to the swing member 12a. Therefore, by adjusting the pressure applied by the two elastic arms 47a to the two swing members 11a, 13a, the contact gap between the moving contacts 31a, 33a of the swing members 11a, 13a and the corresponding static contacts can be adjusted to be larger than the contact gap between the moving contact 32a on the swing member 12a and the corresponding static contact. In other words, the contact gap between the moving contact 32a on the swing member 12a and the corresponding static contact and the contact gap between the moving contacts 31a, 33a of the swing members 11a, 13a and the corresponding static contacts form a gap difference h (see Figure 12).

Each elastic arm 47a of the connecting piece 4a has a pair of V-shaped portions 43a, 44a, and the opening directions of the pair of V-shaped portions 43a, 44a are opposite, and the two V-shaped portions 44a of the two elastic arms 47a away from the sheet body 40a abut against the swinging members 11a, 13a respectively. The unfolded plane shape of the V-shaped portions 43a, 44a is similar to a trapezoidal shape.

In this embodiment, the connecting piece 4a is fixed to the first surface of the middle swinging member 12a. In other embodiments, the connecting piece 4a may also be fixed to the second surface of the middle swinging member 12a. The sheet body 40a of the connecting piece 4a is flush with the end of the extension portion 121a, and a bend 41a is provided at the end of the sheet body 40a. The sheet body 40a is provided with a bend portion 42a between the bend 41a and the moving contact 32a.

In this embodiment, a compression spring 5a is connected to the side of the three swing members 11a, 12a, 13a away from the moving contacts 31a, 32a, 33a, and the root of the compression spring 5a is fixed to the three moving contacts 31a, 32a, 33a of the swing members. At a certain position, the end of the compression spring 5a is divided into three forked pieces, which extend to the corresponding card slots of the push card 2a respectively.

In this embodiment, the main body 1a is composed of multiple spring sheets stacked together, and the corresponding swinging parts are also composed of multiple spring sheets stacked together; the flange structure 122a is arranged on the first spring sheet 14a on the outer side of the swinging part 12a, and the two sides of the flange structure 122a are respectively bent toward the second spring sheet 15a, and the corresponding positions of the second spring sheet 15a are respectively provided with a yield structure 151a.

In this embodiment, the body 1a is composed of four springs stacked together; wherein the first spring 14a, the second spring 15a and the third spring 16a are respectively provided with corresponding extensions, and the fourth spring 17a is not provided with an extension. The first spring 14a, the second spring 15a and the third spring 16a of the three swinging members further have a U-shaped portion 18a between the moving contacts 31a, 32a, 33a and the root 10a, and the opening of the U-shaped portion 18a faces away from the side of the body having the moving contacts 31a, 32a, 33a.

In this embodiment, the moving contact 32a of the middle swinging member 12a among the three swinging members and the moving contacts 31a, 33a of the swinging members 11a, 13a on both sides are staggered in the length direction of the main body 1a, and the moving contact 32a on the swinging member 12a is larger than the moving contacts 31a, 33a on the swinging members 11a, 13a, and the width of the swinging member 12a is larger than the width of the swinging members 11a, 13a.

6 , an electromagnetic relay disclosed in the present invention includes the above-mentioned three-contact movable spring piece, static spring 61a, static contact 62a, magnetic circuit portion 7a, armature assembly 8a and movable spring lead piece 9a. The first armature, the second armature and the magnet of the armature assembly 8a are combined into an integral part of an I-shaped structure through plastic parts. The yoke of the magnetic circuit part 7a is matched with the openings on both sides of the I-shaped structure of the armature assembly 8a. The static contact 62a is fixed to one end of the static spring 61a, and the other end of the static spring 61a is usually extended to the outside of the relay housing as a lead-out part. One end of the three-contact moving spring piece is fixed to the moving contacts 31a, 32a, and 33a, and the other end of the three-contact moving spring piece is fixed to one end of the moving spring lead-out piece 9a, and the other end of the moving spring lead-out piece 9a is also extended to the outside of the relay housing as a lead-out part. The moving contacts 31a, 32a, and 33a are in a matched position with the static contact 62a. The armature assembly 8a is matched with one end of the push card 2a through the plastic push arm 81a, and the other end of the push card 2a is matched with the moving spring piece.

The multi-contact moving spring and electromagnetic relay disclosed in the present invention have an extension 121a for matching with the card slot of the push card at the free end of one of the swinging members, and a connecting piece 4a is fixedly connected to the moving contact of the swinging member, and the connecting piece 4a has a sheet body and an elastic arm extending from the sheet body to the side, and the elastic arm abuts against the remaining swinging members. In this structure disclosed in the present invention, when the push card pushes one of the swinging members, the connecting piece can drive the movement of the other swinging members, thereby avoiding the inconsistency of the contact gaps between the moving contacts and the corresponding static contacts caused by the skewness of the push card; and the pressure applied by the elastic arm of the connecting piece to the swinging member can be adjusted, thereby adjusting the contact gaps between the moving contacts and the corresponding static contacts of each swinging member to meet specific application occasions.

In the multi-contact moving spring and electromagnetic relay disclosed in the present invention, flange structures 122a are respectively provided on both sides of the extension portion 121a of the swinging member. This structure disclosed in the present invention utilizes the flange structure 122a of the moving spring to contact the push card 2a, thereby reducing the friction between the moving spring and the push card when swinging, thereby reducing the generation of scraps.

In the multi-contact moving spring and electromagnetic relay disclosed in the present invention, the sheet body 40a of the connecting sheet 4a is flush with the extension portion 121a, and a bend 41a is provided at the end of the sheet body 40a. position to prevent the push card 2a from being disengaged.

In the multi-contact moving spring and electromagnetic relay disclosed in the present invention, a bending portion 42a is provided on the sheet body 40a of the connecting sheet 4a between the moving contact 32a and the bend 41a. This structure disclosed in the present invention reduces the rigidity of the connecting sheet 4a and can prevent permanent deformation after long-term movement.

In the multi-contact moving spring and electromagnetic relay disclosed in the present invention, the elastic arm 47a of the connecting piece 4a is provided with two V-shaped portions 43a and 44a with opposite opening directions, and the V-shaped portion 44a on the outside abuts against the corresponding swinging member. The plane shape of each V-shaped portion after unfolding is quasi-trapezoidal. This structure disclosed in the present invention enables the V-shaped portion to form a linear contact with the swinging member with its arc surface, thereby reducing the friction between the elastic arm 47a and the swinging member. In addition, because the plane shape of the V-shaped portion after unfolding is quasi-trapezoidal, the deformation position of the elastic arm occurs near the contact position with the swinging member, the root deformation of the elastic arm is small, and pressure can be applied more reliably.

In the multi-contact moving spring and electromagnetic relay disclosed in the present invention, the moving contact of the swinging piece fixed with the connecting piece and the moving contacts of the other swinging pieces are staggered in the length direction of the body of the moving spring, and the moving contact on the swinging piece fixed with the connecting piece is larger than the moving contacts on the other swinging pieces, and the width of the swinging piece fixed with the connecting piece is larger than the width of the other swinging pieces. In this structure disclosed in the present invention, the moving contact on the swinging piece fixed with the connecting piece is the largest, ensuring that the current flowing through it is the largest. The oscillating piece with the connecting piece fixed thereon is less deformed due to its large width, and the oscillating piece with the connecting piece fixed thereon is less deformed. In applications where the gaps between the contact points are inconsistent, the gap difference control between the contact gaps is more reliable. At the same time, the elastic arm of the connecting piece presses the remaining oscillating pieces to keep these oscillating pieces away from the oscillating piece with the connecting piece fixed thereon. Therefore, the contact gap between the moving contact on the oscillating piece with the connecting piece fixed thereon and the corresponding static contact is smaller than the contact gap between the moving contact on the oscillating piece with the connecting piece fixed thereon and the corresponding static contact. When multiple closed moving and static contacts are disconnected, the moving contacts on the remaining oscillating pieces are separated from the corresponding static contacts first, and the moving contacts on the oscillating piece with the connecting piece fixed thereon are separated from the corresponding static contacts later. In this way, when multiple moving and static contacts are instantly disconnected, an arc is generated only between the moving contact and the static contact on the oscillating piece with the connecting piece fixed thereon, and no arc is generated between the moving contact and the static contact on the remaining oscillating pieces. This is beneficial to reducing the temperature rise of the resistor, thereby reducing the temperature rise of the relay and extending its service life.

Embodiment 2

As shown in Figures 7-9, the second embodiment of the multi-contact movable spring of the present disclosure is different from the first embodiment in that the movable spring is a two-contact movable spring. A slit is opened on the body 1a, so that the body 1a of the movable spring forms two swinging members 11a and 12a that can swing freely relative to the root. The first surface near the free end of each swinging member is respectively fixed with a movable contact, that is, a movable contact 31a and 32a. In some other embodiments, each movable contact can also be set on the second surface of each swinging member. The free end of the swinging member 12a is provided with an extension 121a for matching with the card slot of the push card 2a. A connecting piece 4a is also fixedly connected to the moving contact 32a of the swinging member 12a. The connecting piece 4a includes a sheet body 40a and an elastic arm 47a. The elastic arm 47a extends toward the swinging member 11a and abuts against the swinging member 11a. The moving contact 32a of the swing member 12a and the moving contact 31a of the swing member 11a are staggered in the length direction of the body 1a of the moving spring, and the moving contact 32a of the swing member 12a is larger than the moving contact 3a of the swing member 11a, and the width of the swing member 12a is larger than the width of the swing member 11a.

The other structures of the second embodiment are basically the same as those of the first embodiment and will not be described again here.

Embodiment 3

As shown in Figs. 10-12, the multi-contact moving spring and electromagnetic relay disclosed in the present invention are different from those in the first embodiment in that the moving spring is a five-contact moving spring. The body 1a is provided with four slits, so that the body 1a of the moving spring forms five swinging members 11a, 12a, 13a, 19a, 20a that can swing freely relative to the root, and each swinging member is respectively fixed with a moving contact on the first surface close to its free end, namely, moving contacts 31a, 32a, 33a, 34a, 35a, and the swinging member 12a is located in the middle of the plurality of swinging members, and the free end of the swinging member 12a is provided with an extension 121a for matching with the card slot of the push card 2a. A connecting piece 4a is fixedly connected to the moving contact 32a of the swing member 12a. The connecting piece 4a includes a sheet body 40a and two elastic arms 47a extending from the sheet body 40a to both sides; each elastic arm 4a has two pairs of V-shaped parts, and each pair of V-shaped parts includes two V-shaped parts with opposite opening directions. As shown in FIG12a, the 4a V-shaped parts of each elastic arm are 43a, 44a, 45a, and 46a respectively. The moving contact 32a on the swing member 12a and the moving contacts 31a, 33a, 34a, and 35a on the other four swing members are staggered in the length direction of the body 1a, and the moving contact 32a on the swing member 12a is larger than the moving contacts 31a, 33a, 34a, and 35a on the other four swing members. The width of the swing member 12a is larger than the width of the swing members 11a, 13a, 19a, and 20a.

The other structures of the third embodiment are basically the same as those of the first embodiment and will not be described again here.

The above is only a preferred embodiment of the present disclosure, and does not limit the present disclosure in any form. Although the present disclosure has been disclosed as above with a preferred embodiment, it is not used to limit the present disclosure. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present disclosure by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present disclosure. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the essence of the technology of the present disclosure without departing from the content of the technical solution of the present disclosure should fall within the scope of protection of the technical solution of the present disclosure.

In addition, the magnetic latching relay is usually composed of a magnetic circuit system, a contact system, a push mechanism and a base. The magnetic circuit system is generally composed of two basically symmetrical magnetic circuits, including a stationary magnetic conductive part, a movable magnetic conductive part and a coil. The contact system includes a moving spring part and a static spring part. The push mechanism mainly includes a push card. When the relay coil is connected to a positive pulse voltage, the magnetic circuit system works, and the push card pushes the moving spring part, so that the moving contact of the moving spring part contacts the static contact of the static spring part, and the relay is actuated; when the coil is connected to a reverse pulse voltage, the magnetic circuit system works, and the push card pushes the moving spring part, so that the moving contact of the moving spring part is disconnected from the static contact of the static spring part, and the relay is reset. Among them, the push card is a component connecting plastic and metal. It slides relative to the metal part. Due to sliding friction, plastic chips are easily generated. In addition, in the existing technology, the push card contacts the metal part at the edge in the direction of movement, and there is no anti-scratch design. The generated plastic chips are very likely to cause the contact to be non-conductive.

The present disclosure also provides a connection structure for a moving reed and a push card and an electromagnetic relay, by providing flange structures on both sides of an extension portion of one of the swinging parts, thereby reducing scraping generated by the moving reed and the push card in the width direction of the body of the moving reed when the moving reed swings.

According to one aspect of the present disclosure, a connection structure between a movable spring and a push card is provided, wherein the movable spring comprises a body; the body has a first end and a second end opposite to each other along its length direction, and has two opposite sides along its width direction; the part of the body close to the first end is a root, and the body is provided with at least one slit, The slit extends from the root of the body toward the second end, so that the body forms at least two swinging members that can swing freely relative to the root, and a moving contact is fixed on one surface of each of the swinging members at a position close to the free end of the swinging member; the free end of each of the swinging members is provided with an extension portion extending in a direction away from the moving contact; at least two card slots penetrating the thickness direction are arranged side by side on the push card; the extension portion of each of the swinging members is respectively fitted in the corresponding card slot; the two sides of the extension portion of one of the swinging members are respectively provided with a flanging structure, and the distance between the flanging structure and the corresponding inner wall of the card slot is smaller than the distance between the side of the extension portion without the flanging structure and the corresponding inner wall of the corresponding card slot, so as to utilize the flanging structure to contact the card slot to reduce the scraping generated by the swinging member and the push card in the width direction of the body when the swinging member swings.

According to an embodiment of the present disclosure, the flange structure is a curved surface.

According to an embodiment of the present disclosure, there are an odd number of the swing members, and the flange structure is provided on an extension portion of the middlemost swing member among the multiple swing members.

According to one embodiment of the present disclosure, the sum of the distances between the flange structures on both sides of the extension portion and the corresponding inner walls of the corresponding slot is smaller than the distance between any one of the two sides of the extension portion without the flange structure and the corresponding inner wall of the corresponding slot.

According to an embodiment of the present disclosure, the movable spring is composed of multiple springs stacked together, the swinging member is composed of multiple springs stacked together, and the extension portion is composed of multiple springs stacked together; the flange structure is provided on one of the springs.

According to an embodiment of the present disclosure, the flange structure is provided on an outermost reed leaf among the plurality of reed leaves, and the flange structures on both sides are respectively bent toward adjacent reed leaves, and both sides of the adjacent reed leaves are respectively provided with a yield structure.

According to an embodiment of the present disclosure, each reed of each swinging member is respectively provided with a shoulder extending along the length direction of the main body at a position close to the extending portion, wherein the shoulder of one of the reeds is longer, so that when the movable reed is in action, only the reed with the longer shoulder in the thickness direction of the push card contacts the push card, thereby reducing scraping generated in the thickness direction between the movable reed and the push card when the movable reed swings.

According to one embodiment of the present disclosure, the length of the shoulder of the outer reed is longer.

According to one embodiment of the present disclosure, the movable reed includes a first reed, a second reed, a third reed and a fourth reed stacked in sequence; wherein the first reed, the second reed and the third reed are respectively provided with an extension portion, and the fourth reed is not provided with an extension portion.

According to one embodiment of the present disclosure, the first reed, the second reed and the third reed of each swinging member are respectively provided with shoulders extending along the length direction of the body at a position close to the extending portion, and the shoulders of the first reed are longer than the shoulders of the second reed and the third reed, so that when the movable reed is in action, only the first reed is in contact with the push card in the thickness direction of the push card, thereby reducing the scraping generated in the thickness direction between the movable reed and the push card when the movable reed swings.

According to one embodiment of the present disclosure, the first reed, the second reed and the third reed of each swing member A U-shaped portion is also provided between the moving contact and the root, and an opening of the U-shaped portion faces away from a side of the body having the moving contact.

According to one aspect of the present disclosure, an electromagnetic relay includes the connection structure between the movable reed and the push card described in the present disclosure.

1. In the present disclosure, the two sides of the extension of one of the swinging members are provided with flange structures, and the distance between the flange structures and the corresponding inner walls of the corresponding slot is smaller than the distance between the two sides of the extension without flange structures and the corresponding inner walls of the corresponding slot. This structure of the present disclosure utilizes the flange structure of the movable spring to contact the push card, thereby reducing the scraping generated by the movable spring and the push card in the width direction of the body of the movable spring when the movable spring swings.

2. Furthermore, in the present disclosure, the first reed, the second reed and the third reed of the swinging member are provided with shoulders at positions close to the extension portion, and the shoulders of the first reed are higher than the shoulders of the second reed and the third reed. With this structure of the present disclosure, when the moving reed is in motion, only the first reed contacts the push card in the thickness direction of the push card, thereby reducing scraps generated by the moving reed and the push card in the thickness direction when the moving reed swings.

The present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the connection structure between the movable spring and the push card and the electromagnetic relay of the present disclosure are not limited to the embodiments.

Embodiment 4

In the connection structure for a movable spring piece and a push card disclosed in the present invention, the movable spring piece includes a body, an extension portion and a connecting piece. The body has two opposite sides along its width direction. The portion of the body close to the first end is a root. The body is provided with at least one slit, and the slit extends from the root of the body toward the second end, so that the body forms at least two swinging members that can swing freely relative to the root. A moving contact is fixed on a surface of each of the swinging members near the free end of the swinging member. The free end of each of the swinging members is provided with an extension portion extending in a direction away from the moving contact.

At least two card slots penetrating the thickness direction are arranged side by side on the push card; the extension parts of each swinging member are respectively matched in the corresponding card slots.

The extension part of one of the swinging parts is provided with a flange structure on both sides, and the distance between the flange structure and the corresponding inner wall of the slot is smaller than the distance between the side of the extension part without the flange structure and the corresponding inner wall of the corresponding slot, so as to utilize the flange structure to contact with the slot and reduce the scraping generated by the swinging part and the pushing card in the width direction of the main body when the swinging part swings.

13 to 16 , in this embodiment, there are three swinging members, and the movable spring is a three-contact movable spring. In other embodiments, the number of the swinging members can be other odd numbers.

The main body 1b of the movable spring has two slits extending upward from the root, so that the main body 1b forms three swinging parts 11b, 12b, and 13b (see Figure 20) that can swing freely relative to the root. A moving contact 3b is fixed to a surface of each swinging part close to its free end. The free ends of the three swinging parts are respectively provided with extensions 111b, 121b, and 131b extending away from the moving contact 3b. The push card 2b is provided with three side-by-side through the thickness direction T. The extensions 111b, 121b, 131b of the three swinging members are respectively matched in the corresponding slots 21b, 22b, 23b. The thickness direction T of the push card 2b is consistent with the length direction L of the main body 1b of the movable spring. The extension 121b of the swinging member 12b located in the middle of the three swinging members is provided with flange structures 1211b on both sides, and the distance between the flange structure 1211b and the corresponding inner wall of the corresponding slot 22b is smaller than the distance between the two side edges of the extensions 111b, 131b of the swinging members 11b, 13b on both sides and the corresponding inner wall of the corresponding slot 21b, 23b, so as to utilize the flange structure 1211b of the movable spring to contact with the push card 2b, and reduce the scraping generated in the width direction W between the movable spring and the push card 2b when the movable spring swings.

In this embodiment, the sum of the distances between the flange structures 1211b on both sides of the extension 121b of the swing member 12b located in the middle and the corresponding inner wall of the corresponding slot 22b is less than the distances between the side edges of the extensions 111b and 131b of the swing members 11b and 13b located on both sides and the corresponding inner wall of the corresponding slot 21b and 23b. Specifically, the distances between the flange structures 1211b on both sides of the extension 121b of the swing member 12b and the corresponding inner wall of the corresponding slot 22b are 0.1 mm, and the distances between the side edges of the extensions 111b and 131b of the swing members 11b and 13b on both sides and the corresponding inner wall of the corresponding slot 21b and 23b are 0.3 mm respectively.

In this embodiment, the movable spring sheet may include multiple spring sheets stacked together; the flange structure 1211b is arranged on the first spring sheet 14b on the outside, and the flange structures 1211b on both sides are respectively bent toward the second spring sheet 15b, and the two sides of the second spring sheet 15b are respectively provided with a yield structure 1212b.

In this embodiment, the movable spring is composed of four springs stacked together; wherein the first spring 14b, the second spring 15b and the third spring 16b are respectively provided with an extension portion, and the fourth spring 17b is not provided with an extension portion.

In this embodiment, as shown in Figure 16b, the first reed 14b, the second reed 15b and the third reed 16b of the three swinging members are respectively provided with shoulders 141b, 151b, 161b extending along the length direction L of the main body 1 at positions close to the extension parts, and the shoulder 141b of the first reed 14b is longer than the shoulder 151b of the second reed 15b and the shoulder 161b of the third reed 16b, so that when the movable reed is in action, only the first reed 14b is in contact with the push card 2b in the thickness direction T of the push card 2b (see Figure 15), thereby reducing the generation of scraps between the movable reed and the push card 2b in the thickness direction T when the movable reed swings.

In this embodiment, the first reed 14b, the second reed 15b and the third reed 16b of the three swinging members have a U-shaped portion 18b, and the U-shaped portion 18b is between the moving contact 3b and the root of each reed, and the opening of the U-shaped portion 18b is facing away from the side of the reed 14b with the moving contact.

As shown in FIG. 17 , the electromagnetic relay disclosed in the present invention includes the connection structure between the moving spring piece and the push card as described above, the static spring 51b, the static contact 52b, the moving spring lead-out piece 4b, the magnetic circuit portion 6b and the armature assembly 7b. The first armature, the second armature and the magnetic steel of the armature assembly 7b are combined into an integral part of an I-shaped structure through plastic parts. The yoke 61b of the magnetic circuit portion 6b fits in the openings on both sides of the I-shaped structure of the armature assembly 7b. The static contact 52b is fixed to one end of the static spring 51b, and the other end of the static spring 51b is usually extended to the outside of the relay housing as a lead-out portion. One end of the moving spring piece fixes the moving contact 3b, and the other end of the moving spring piece fixes one end of the moving spring lead-out piece 4b, and the other end of the moving spring lead-out piece 4b also extends to the outside of the relay housing as a lead-out portion. The moving contact 3b and the static contact 52b are in a matching position. The armature assembly 7b matches with one end of the push card 2b through the plastic push arm 71b to push. The other end of the card 2b cooperates with the movable spring.

In the connection structure of the movable spring piece and the push card and the electromagnetic relay disclosed in the present invention, the two sides of the extension part of one of the swinging parts are respectively provided with flange structures 1211b, and the distance between the flange structure 1211b and the corresponding inner wall of the corresponding card slot is smaller than the distance between the side of the extension part without the flange structure and the corresponding inner wall of the corresponding card slot. This structure disclosed in the present invention utilizes the flange structure of the movable spring piece to contact the push card, thereby reducing the generation of scraps by the movable spring piece and the push card in the width direction W of the body of the movable spring piece when the movable spring piece swings.

In the connection structure of the movable spring piece and the push card and the electromagnetic relay disclosed in the present invention, the first spring piece 14b, the second spring piece 15b and the third spring piece 16b of the three swinging parts are respectively provided with shoulders 141b, 151b and 161b near the extension part, and the shoulder 141b of the first spring piece 14b is longer than the shoulder 151b of the second spring piece 15b and the shoulder 161b of the third spring piece 16b. This structure disclosed in the present invention enables the movable spring piece to be in action, and only the first spring piece 14b is in contact with the push card 2b in the thickness direction T of the push card 2b, thereby reducing the scraping generated by the movable spring piece and the push card in the thickness direction T when the movable spring piece swings.

Embodiment 5

As shown in Figures 18-19, the connection structure of the movable spring piece and the push card and the electromagnetic relay disclosed in the present invention are different from those in the fourth embodiment in that the movable spring piece is a two-contact movable spring piece, and a slit is opened on the body 1b of the movable spring piece, so that the body 1b forms two swinging members 11b and 12b that can swing freely relative to the root, and the free ends of the two swinging members are respectively provided with extensions 111b and 121b. Two slots 21b and 22b penetrating the thickness direction T are arranged side by side on the push card 2b; the extensions 111b and 121b of the two swinging members are respectively matched in the corresponding slots 21b and 22b; and the two sides of the extension 121b of the swinging member 12b are respectively provided with flange structures 1211b.

Embodiment 6

As shown in Figs. 20-21, the connection structure of the movable spring piece and the push card and the electromagnetic relay disclosed in the present invention are different from those in the fourth embodiment in that the movable spring piece is a five-contact movable spring piece, and four slits are opened on the body 1b of the movable spring piece, so that the body 1b forms five swinging parts 11b, 12b, 13b, 19b, and 20b that can swing freely relative to the root. The free ends of the five swinging parts are respectively provided with extension parts 111b, 121b, 131b, 191b, and 201b. The push card 2b is provided with five slots 21b, 22b, 23b, 24b, and 25b penetrating the thickness direction T in parallel, and the extension parts 111b, 121b, 131b, 191b, and 201b of the five swing members are respectively matched in the corresponding slots 21b, 22b, 23b, 24b, and 25b; and the extension part 121b of the swing member 12b is provided with flange structures 1211b on both sides.

In addition, in a high current magnetic latching relay and its contact assembly in the prior art, at least one reinforcing rib is formed on the second end of the moving spring, and the reinforcing rib can be formed on the first spring, or can be stacked on the first spring and the second spring, or can be stacked on the first spring, the second spring and the third spring to strengthen the rigidity of the second end. The reinforcing rib is located between the moving contact and the push card, and the length direction of the reinforcing rib is consistent with the length direction of the moving spring. The second end of the moving spring is provided with an outward disconnected slit along the length direction, thereby separating the two moving contacts at the second end of the moving spring.

Although this structure can enhance the rigidity of the spring by reinforcing ribs, each moving spring is provided with reinforcing ribs. The flexibility of each moving spring piece is the same. When the push card is pulled and disconnected, multiple moving contacts and corresponding static contacts are disconnected at the same time, which cannot meet the use requirements in some specific occasions.

The present disclosure also provides a multi-contact moving reed and an electromagnetic relay, wherein ribs are provided on some swinging parts while other swinging parts are not provided with ribs, so that the ribs are utilized to improve the rigidity of some swinging parts, and multiple moving contacts and corresponding static contacts are disconnected in sequence during disconnection.

According to one aspect of the present disclosure, a multi-contact moving spring comprises a body; the body has opposite first and second ends along its length direction, and opposite sides along its width direction, the part of the body close to the first end is a root, and at least one slit is opened on the body, and the slit extends from the root of the body toward the second end, so that the body forms at least two swinging members that can swing freely relative to the root, and a moving contact is fixed on a surface of each of the swinging members near the free end position of the swinging member; the free end of one of the at least two swinging members is provided with an extension extending in a direction away from the moving contact, and the extension is used to cooperate with a card slot of a push card, and some of the at least two swinging members are provided with ribs between the moving contact and the root, so as to utilize the ribs to improve the rigidity of the swinging member, so as to achieve the disconnection between the multiple moving contacts and the corresponding static contacts in sequence during disconnection.

According to an embodiment of the present disclosure, the number of the swinging members is an odd number, and the extending portion is provided at the middlemost swinging member among the plurality of the swinging members.

According to an embodiment of the present disclosure, the ribs are not provided on the swing member provided with the extension portion; the ribs are provided on the swing member not provided with the extension portion.

According to an embodiment of the present disclosure, the rib is located in the middle of the swing member in the width direction.

According to an embodiment of the present disclosure, the rib is a convex strip that is recessed from one surface of the swing member having the moving contact point toward the other surface and protrudes from the other surface.

According to one embodiment of the present disclosure, a compression spring is also connected to a side of the at least two swinging members that is away from the moving contact, and the root of the compression spring is respectively fixed at each moving contact fixing position of the swinging member, and the end of the compression spring is at least two forked pieces that can extend to the corresponding card slots of the push card respectively.

According to one embodiment of the present disclosure, the main body is composed of multiple spring leaves stacked together; the flange structure is arranged on a first spring leaf on the outer side of the multiple spring leaves, and the two sides of the flange structure are respectively bent toward the adjacent spring leaves, and the two sides of the bent spring leaf are respectively provided with a yield structure.

According to one embodiment of the present disclosure, the moving contact on the swing member provided with the extension part is staggered with the moving contacts on the other swing members in the length direction of the body, and the moving contact on the swing member provided with the extension part is larger than the moving contacts on the other swing members.

1. In the present disclosure, the free end of one of the at least two swinging members is provided with an extension portion for cooperating with the card slot of the push card, and some swinging members are also provided with ribs between the moving contact and the root, and the ribs can improve the rigidity of some swinging members. The stronger the rigidity of the spring leaf, the smaller the deformation; the other part of the swinging members is not provided with ribs, so the present disclosure includes swinging members with different rigidities. In the structure of the present invention, during the disconnection process between each moving contact and the corresponding static contact from the closed state to the open state, the swinging part with ribs has a large rigidity, a large deformation amount and a fast speed. After the disconnection is completed, the contact gap between the moving contact and the corresponding static contact is also large; at the same time, the swinging part without ribs has a relatively small rigidity, a small deformation amount and a slow speed. After the disconnection is completed, the contact gap between the moving contact and the corresponding static contact is also small. Therefore, the present invention can realize sequential disconnection, and the contact gap between each moving contact and the corresponding static contact after disconnection is different. Therefore, in actual use, it is only necessary to measure the contact gap (minimum gap) between the moving contact and the corresponding static contact on the swinging part without ribs, and the contact gap between the moving contact and the corresponding static contact on the swinging part with ribs does not need to be measured, which can further simplify the process control points.

2. No ribs are provided on the swinging piece with an extension part, so the rigidity is relatively small; if ribs are provided on the swinging piece without an extension part, the rigidity is relatively large. When multiple closed moving and static contacts are disconnected, the moving contact on the swinging piece with ribs is separated from the corresponding static contact first, and the moving contact on the swinging piece without ribs is separated from the corresponding static contact later. In this way, when multiple moving and static contacts are disconnected instantaneously, an arc is only generated between the moving contact and the static contact on the swinging piece without ribs, and no arc is generated between the moving contact and the static contact on the swinging piece with ribs, which is beneficial to reducing the temperature rise of the resistor, thereby reducing the temperature rise of the relay and extending the service life.

3. In the present disclosure, flange structures are provided on both sides of the extension part to reduce the generation of scraps by friction between the moving spring and the push card. This structure of the present disclosure utilizes the flange structure of the moving spring to contact the push card, reducing the friction between the moving spring and the push card when the moving spring swings, thereby reducing the generation of scraps.

4. In the present disclosure, a compression spring is connected to the side of the three swinging members away from the moving contact, the root of the compression spring is respectively fixed to the three moving contact fixing places of the swinging member, and the end of the compression spring is three forked pieces, which respectively extend to the corresponding card slots of the push card. This structure of the present disclosure does not require auxiliary positioning, reduces the use of parts, and reduces the cost.

The present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the multi-contact moving reed and electromagnetic relay of the present disclosure are not limited to the embodiments.

Embodiment 7

The multi-contact moving spring of the present invention comprises a body. The body has opposite sides along its width direction. The part of the body close to the first end is a root. The body is provided with at least one slit, and the slit extends from the root of the body toward the second end, so that the body forms at least two swinging members that can swing freely relative to the root. A moving contact is fixed on a surface of each swinging member near the free end of the swinging member. The free end of one of the at least two swinging members is provided with an extension extending in a direction away from the moving contact, and the extension is used to cooperate with a card slot of a push card. Some of the at least two swinging members are provided with ribs between the moving contact and the root, so as to utilize the ribs to improve the rigidity of the swinging member, so as to achieve the sequential disconnection between the multiple moving contacts and the corresponding static contacts during disconnection.

Referring to FIG. 22 to FIG. 26 , in this embodiment, the swing member is an odd number, and the movable spring has three contacts. In some other embodiments, the number of the swinging members can be other odd numbers.

The movable spring piece is a three-contact movable spring piece including a body 1c. Two slits are opened on the body 1c, so that the body 1c forms three swinging pieces 11c, 12c, and 13c that can swing freely relative to the root, and a moving contact is fixed on one side close to the free end of each swinging piece; the free end of the swinging piece 12c located in the middle of the three swinging pieces is provided with an extension part 121c extending in a direction away from the moving contact 32c, and the extension part 121c is used to cooperate with the card slot of the push card 2c, and the two swinging pieces 11c and 13c on both sides are provided with ribs between the moving contact and the root. 18c, so as to utilize the ribs 18c to improve the rigidity of the swing members 11c and 13c on both sides, making them greater than the rigidity of the swing member 12c located in the middle, so that when disconnecting, the moving contacts 31c and 33c on the swing members 11c and 13c are disconnected from the corresponding static contacts first, and the moving contact 32c on the swing member 1c is disconnected from the corresponding static contact later, and after the disconnection is completed, the contact gap between the moving contacts 31c and 33c and the corresponding static contacts is greater than the contact gap between the moving contact 32c and the corresponding static contact.

In this embodiment, flange structures 141c are respectively provided on both sides of the extension portion 121c. The flange structures can reduce scraps generated by the friction between the movable spring piece 1c and the push card 2c.

In this embodiment, the rib 18c is in the shape of an elongated strip.

In this embodiment, the two ribs 18c are respectively located in the middle of the swing members 11c and 13c in the width direction W.

In this embodiment, the ribs 18c are convex ribs formed by recessing one surface of the swinging members 11c, 13c having the moving contacts 31c, 33c toward the other surface without the moving contacts 31c, 33c.

In this embodiment, a compression spring 4c is also connected to the side of the three swinging members 11c, 12c, and 13c that is away from the moving contact. The root of the compression spring 4c is respectively fixed at the fixing positions of the three moving contacts 31c, 32c, and 33c of the swinging members 11c, 12c, and 13c. The end of the compression spring 4c is three forked pieces that can extend to the corresponding card slots of the push card 2c respectively.

In this embodiment, the main body 1c is composed of multiple spring sheets stacked together; the flange structure 141c is arranged on the first spring sheet 14c on the outside, and the two sides of the flange structure are respectively bent toward the adjacent second spring sheet 15c, and the two side edges of the second spring sheet 15c are respectively provided with a yield structure 151c.

In this embodiment, the main body 1c is composed of four reeds stacked together, namely, a first reed 14c, a second reed 15c, a third reed 16c and a fourth reed 17c; wherein the first reed 14c, the second reed 15c and the third reed 16c are respectively provided with corresponding extension parts, and the fourth reed 17c is not provided with an extension part.

In this embodiment, the first spring leaf 14c, the second spring leaf 15c and the third spring leaf 16c of the three swinging members are bent into a U-shaped portion 19c between the moving contact and the root, and the opening of the U-shaped portion 19c faces away from the side of the spring leaf with the moving contact; the rib 18c is arranged on the fourth spring leaf 17c.

In this embodiment, the moving contact 32c of the middle swinging member 12c among the three swinging members and the moving contacts 31c, 33c of the swinging members 11c, 13c on both sides are staggered along the length L direction of the main body 1c, and the middle moving contact 32c is larger than the moving contacts 31c, 33c on both sides.

As shown in FIG. 27 , the electromagnetic relay disclosed in the present invention comprises a multi-contact movable spring piece, a static spring 51 c, a static contact 52 c, a magnetic circuit portion 6 c, an armature assembly 7 c and a movable spring lead-out piece 8 c as described in the above embodiment. The first armature, the second armature and the magnetic steel of the armature assembly 7 c are combined into an integral part of an I-shaped structure through a plastic part. The yoke of the magnetic circuit portion 6 c is fitted at the openings on both sides of the I-shaped structure of the armature assembly 7 c. The static contact 52 c is fixed to one end of the static spring 51 c. End, the other end of the static spring 51c is usually used as a lead-out part and extends out of the relay housing, one end of the moving spring piece fixes the moving contact, and the other end of the moving spring piece fixes one end of the moving spring lead-out piece 8c, and the other end of the moving spring lead-out piece 8c also extends out of the relay housing as a lead-out part, the moving contact and the static contact 52c are in a matching position, the armature assembly 7c is matched with one end of the push card 2c through the plastic push arm 71c, and the other end of the push card 2c is matched with the moving spring piece.

In the multi-contact moving reed and electromagnetic relay disclosed in the present invention, some of the at least two swinging members are further provided with ribs 18c between the moving contact and the root to improve the rigidity of the swinging member by using the ribs 18c, while the other part of the swinging members are not provided with ribs. In the structure of the present invention, during the disconnection process from the closed state to the open state, the swinging member with the rib 18c has a large deformation amount and a fast speed due to its large rigidity. After the disconnection is completed, the contact gap between the moving contact and the corresponding static contact is also large. At the same time, the swinging member without the rib 18c has a relatively small rigidity, a small deformation amount and a slow speed. After the disconnection is completed, the contact gap between the moving contact and the corresponding static contact is also small. Therefore, the present invention can realize sequential disconnection, and the contact gap between each moving contact and the corresponding static contact after disconnection is different. Therefore, in actual use, it is only necessary to measure the contact gap (minimum gap) between the moving contact and the corresponding static contact on the swinging member without the rib 18c, and the contact gap between the moving contact and the corresponding static contact on the swinging member with the rib does not need to be measured, which can further simplify the process control points.

In the multi-contact moving spring and electromagnetic relay disclosed in the present invention, flange structures 141c are respectively provided on both sides of the extension part, so as to utilize the flange structures 141c to reduce the generation of scraps by the friction between the moving spring 1c and the push card 2c. This structure disclosed in the present invention utilizes the flange structure of the moving spring to contact the push card, thereby reducing the friction between the moving spring and the push card when swinging, thereby reducing the generation of scraps.

In the multi-contact moving spring and electromagnetic relay disclosed in the present invention, a compression spring 4c is connected to the side of the three swinging members 11c, 12c, and 13c that is away from the moving contact, and the root of the compression spring 4c is respectively fixed to the three moving contact fixing positions of the swinging member, and the end of the compression spring is three forked pieces, which respectively extend to the corresponding card slots of the push card 2c. This structure disclosed in the present invention does not require auxiliary positioning, reduces the use of parts, and reduces the cost.

Embodiment 8

As shown in Figures 28-29, the multi-contact moving spring and electromagnetic relay disclosed in the present invention are different from those in the seventh embodiment in that the moving spring is a two-contact moving spring, a slit is provided on the body 1c, so that the body 1c forms two swinging members 11c and 12c that can swing freely relative to the root, the extension 121c is provided on the swinging member 12c, and a rib 18c is provided on the swinging member 11c. The moving contact 32c of the swinging member 12c is staggered with the moving contact 31c on the swinging member 11c in the length direction L of the body 1c, and the moving contact 32c is larger than the moving contact 31c.

Embodiment 9

As shown in Figures 30-31, the multi-contact moving spring and electromagnetic relay disclosed in the present invention are different from those in the seventh embodiment in that the moving spring is a five-contact moving spring, and four slits are opened on the body 1c, so that the body 1c forms five swinging members 11c, 12c, 13c, 20c, and 21c that can swing freely relative to the root, and the extension 121c is arranged on the swinging member 12c, and the swinging members 11c, 13c, 20c, and 21c are respectively provided with ribs 18c. The moving contact 32c of the swinging member 12c and the moving contacts 31c, 33c, 34c, and 35c of the swinging members 11c, 13c, 20c, and 21c on both sides are connected to the body. 1c is staggered in the length direction L, and the moving contact 32c is larger than the moving contacts 31c, 33c, 34c, and 35c.

It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The present disclosure can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and/or the drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best mode known for implementing the present disclosure and will enable those skilled in the art to utilize the present disclosure.

Claims

A multi-contact moving spring comprises a body; the body has opposite first and second surfaces, opposite first and second ends along its length direction, and opposite two sides along its width direction; the part of the body close to the first end is a root; the body is provided with at least one slit, the slit extends from the root of the body toward the second end, so that the body forms at least two swinging members that can swing freely relative to the root; a moving contact is fixed on the first surface or the second surface of each swinging member near the free end of the swinging member; its characteristics The invention is characterized in that: the free end of at least one of the two swinging members is provided with an extension portion extending in the direction away from the moving contact, and the extension portion is used to cooperate with the card slot of the push card; a connecting piece is fixed on at least one of the two swinging members, and the connecting piece includes a sheet body and an elastic arm extending along the width direction of the body of the moving spring sheet, and the elastic arm abuts against the remaining swinging members except the swinging member fixing the connecting piece, and the contact gap between the moving contact and the corresponding static contact on the swinging member is adjusted by adjusting the pressure value applied to the swinging member by the elastic arm.
The multi-contact moving spring according to claim 1 is characterized in that: the number of the swinging members is an odd number, the extension portion is provided on the middle swinging member among the plurality of the swinging members, and the connecting piece has two elastic arms, which respectively abut against the swinging members on both sides.
The multi-contact moving spring according to claim 1 or 2 is characterized in that: flange structures are respectively provided on both sides of the extension portion, so as to utilize the flange structures to reduce scraping caused by friction between the moving spring and the push card.
The multi-contact moving spring according to claim 1 is characterized in that the body of the connecting piece is fixed to the surface of the swinging member provided with the extending portion.
The multi-contact moving spring according to claim 4 is characterized in that the sheet body of the connecting sheet extends from the root of the body toward the second end of the body until it is flush with the extending portion.
The multi-contact moving spring according to claim 4 is characterized in that the end of the connecting piece is provided with a bend.
The multi-contact moving spring according to claim 5 is characterized in that a bending portion is provided on the sheet body of the connecting sheet, and the bending portion is between the moving contact and the bend.
The multi-contact moving spring according to claim 1 is characterized in that: the elastic arm of the connecting piece has at least one pair of V-shaped portions with opposite opening directions; and the plane shape of the V-shaped portion after unfolding is a trapezoid.
The multi-contact moving spring according to claim 3 is characterized in that: the main body is composed of multiple springs stacked together, and the swing member is composed of multiple springs stacked together; the flange structure is arranged on an outer spring, and the flange structures on both sides are respectively bent toward adjacent springs, and the two side edges of the adjacent springs are respectively provided with a yield structure.
The multi-contact moving spring according to claim 1 is characterized in that: the swinging member to which the connecting piece is fixed The moving contact on the swing member is staggered with the moving contacts on the other swing members in the length direction of the body, and the moving contact on the swing member fixed with the connecting piece is larger than the moving contacts on the other swing members, and the width of the swing member fixed with the connecting piece is larger than the width of the other swing members.
The multi-contact moving spring according to claim 1 is characterized in that: there are two swinging members, the extension portion is arranged on one of the swinging members, the connecting piece has an elastic arm, and the elastic arm extends toward the other swinging member and abuts against the other swinging member.
An electromagnetic relay, characterized by comprising the multi-contact moving spring as claimed in any one of claims 1 to 11.