CN212342550U - Moving and static contact structure of magnetic latching direct current relay - Google Patents

Abstract

The utility model provides a magnetic latching direct current relay's sound contact structure includes: a contact assembly and a base. The contact assembly comprises a static contact piece, a dynamic spring, a pushing card, two static contacts and two dynamic contacts. The promotion card has been seted up and has been promoted groove and fixed slot, moves the splicing and inserts in promoting the groove and with promotion card sliding connection. One end of the movable spring plate is connected to the movable contact piece, and the other end portion of the movable spring plate is inserted into the fixing groove and connected to the push card. The static contact pieces and the movable contact spring are arranged at intervals. The two static contacts are respectively connected with the static connecting sheet, the two moving contacts are respectively connected with the moving contact spring, and the end surface of each static contact is parallel to and correspondingly arranged with the end surface of one moving contact. The static contact piece, the dynamic spring, the pushing card, the two static contacts and the two dynamic contacts are contained in the base. The static contact strip is provided with two static terminals, the movable contact strip is provided with two movable terminals, and the static terminals and the movable terminals are exposed out of the base. The dynamic and static contact structure improves the current breaking performance and prolongs the electric service life.

Description

Moving and static contact structure of magnetic latching direct current relay

Technical Field

The utility model relates to a magnetic latching direct current relay's technical field especially relates to a magnetic latching direct current relay's sound contact structure.

Background

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

However, with the current moving and stationary contact structure of the magnetic latching relay, it is difficult to further increase the contact pitch while ensuring the compactness of the product. So that the breaking performance of the current is insufficient and the electric service life of the product is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a moving and static contact structure of a magnetically latching dc relay for solving the technical problems of insufficient current breaking performance and short electrical life.

A kind of magnetic latching direct current relay's moving and static contact structure, this magnetic latching direct current relay's moving and static contact structure includes: the contact assembly is contained in the base and is connected with the base. The contact assembly comprises a static contact piece, a dynamic spring, a pushing card, two static contacts and two dynamic contacts. The promotion card has been seted up and has been promoted groove and fixed slot, move the splicing insert promote in the groove and with promote card sliding connection. One end of the movable spring plate is connected with the movable connecting plate, and the other end part of the movable spring plate is inserted into the fixed groove and connected with the pushing card. The static connecting piece and the movable spring piece are arranged at intervals. The two static contacts are respectively connected with the static connecting sheet, the two moving contacts are respectively connected with the moving spring, and the end surface of each static contact is parallel to and corresponds to the end surface of one moving contact. The pushing card is used for pushing the movable spring plate to move towards the static connecting plate. The static contact piece, the dynamic spring, the pushing card, the two static contacts and the two dynamic contacts are contained in the base. The static connecting piece and the movable connecting piece penetrate through the base and are connected with the base. The static contact piece is provided with two static terminals, the movable contact piece is provided with two movable terminals, and the static terminals and the movable terminals are exposed out of the base.

In one embodiment, the movable spring is provided with a strip-shaped hole, and the two movable contacts are respectively positioned on two sides of the strip-shaped hole.

In one embodiment, the movable contact piece is provided with a plurality of fixing blocks at one end far away from the movable terminal, and each fixing block penetrates through the movable spring and is connected with the movable spring.

In one embodiment, the movable spring plate comprises a plurality of sub copper sheets, and the sub copper sheets are connected in an overlapped mode. The moving contact penetrates through the sub copper sheets in sequence and is connected with the sub copper sheets.

In one embodiment, the contact assembly further includes a first heat sink abutting a sub-copper sheet adjacent to the static contact, and the movable contact penetrates the first heat sink and is connected to the first heat sink.

In one embodiment, the contact assembly further includes a second heat sink, the second heat sink abuts against a sub copper sheet far away from the static contact, and the movable contact penetrates through the second heat sink and is connected with the second heat sink.

In one embodiment, the movable contact is riveted with the first heat sink, the second heat sink and each of the sub-copper sheets.

In one embodiment, the fixed contact piece is provided with two fixing holes, and each fixed contact part is inserted into one fixing hole and riveted with the fixed contact piece.

In one embodiment, the moving and static contact structure of the magnetically latching dc relay further includes a fastening bracket, a fastening groove is formed in the fastening bracket, the movable spring and the movable contact piece are inserted into the fastening groove and clamped with the fastening bracket, and the fastening bracket is covered on the top of the base.

In one embodiment, two sides of the fastening bracket are respectively provided with a buckle, the base is provided with two buckle grooves, and each buckle is inserted into one buckle groove and connected with the base.

The moving and static contact structure of the magnetic latching direct current relay is connected with an external circuit through the static terminal and the moving terminal. Through the drive assembly in the promotion card connection relay, under drive assembly drive effect, promote the card and order about the movable contact spring motion to make the moving contact be close to or keep away from the static contact motion, thereby realize the disconnected control to external circuit. The shunting function is realized through the one-to-one arrangement of the two moving contacts and the two static contacts. When the static contact piece and the movable contact piece flow through large current, the two moving contacts and the two static contacts are shunted, and the current of a single contact is reduced, so that the electrodynamic force generated by the contact surface of the contact is reduced, and the purposes of reducing contact consumption and preventing adhesion are achieved. The end face of each static contact is parallel to the end face of one moving contact, so that under the condition of ensuring the compactness of the relay, namely, under the condition of not increasing the action distance of the magnetic latching iron core with bidirectional action, the contact distance between the moving contact and the static contact is increased, namely, the contact Gap is increased, thereby being beneficial to breaking electric arcs and prolonging the electric service life of a product. The moving and static contact structure of the magnetic latching direct current relay improves the current breaking performance and prolongs the electric service life.

Drawings

FIG. 1 is a schematic structural diagram of a moving and static contact structure of a magnetically latching DC relay in one embodiment;

fig. 2 is a schematic structural disassembly diagram of a moving and static contact structure of the magnetic latching direct-current relay in the embodiment shown in fig. 1;

FIG. 3 is a schematic structural diagram of a contact assembly of a moving and static contact structure of a magnetically latching DC relay in one embodiment;

FIG. 4 is another schematic diagram of a contact assembly of a moving and static contact structure of a magnetically latching DC relay in one embodiment;

FIG. 5 is a partial structural diagram of a moving and static contact structure of a magnetically latching DC relay in one embodiment;

fig. 6 is a schematic diagram showing another part of a structure of a moving and static contact structure of the magnetically latching dc relay in an embodiment, which is disassembled.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, the present invention provides a moving and static contact structure 10 of a magnetic latching dc relay, where the moving and static contact structure 10 of the magnetic latching dc relay includes: the contact assembly 100 and the base 200, the contact assembly 100 is received in the base 200 and connected to the base 200. The contact assembly 100 includes a stationary contact 110, a movable contact 120, a movable spring 130, a push card 140, two stationary contacts 150, and two movable contacts 160. The push card 140 has a push slot 141 and a fixing slot 142, and the movable tab 120 is inserted into the push slot 141 and slidably connected to the push card 140. One end of the movable spring plate 130 is coupled to the movable tab 120, and the other end portion of the movable spring plate 130 is inserted into the fixing groove 142 and coupled to the push card 140. The stationary blade 110 is spaced apart from the movable blade 130. The two fixed contacts 150 are respectively connected to the fixed contact pieces 110, the two movable contacts 160 are respectively connected to the movable spring pieces 130, and an end surface of each fixed contact 150 is parallel to and corresponds to an end surface of one movable contact 160. The push latch 140 serves to push the movable spring plate 130 toward the stationary blade 110. The fixed contact piece 110, the movable contact piece 120, the movable spring 130, the push card 140, the two fixed contacts 150 and the two movable contacts 160 are accommodated in the base 200. The stationary blade 110 and the movable blade 120 partially penetrate the base 200 and are connected to the base 200. The fixed contact piece 110 is provided with two fixed terminals 111, the movable contact piece 120 is provided with two movable terminals 121, and the fixed terminals 111 and the movable terminals 121 are exposed out of the base 200.

The moving and static contact structure 10 of the magnetically latching dc relay is connected to an external circuit through the static terminal 111 and the moving terminal 121. The pushing card 140 is connected with a driving component in the relay, and under the driving action of the driving component, the pushing card 140 drives the movable spring plate 130 to move, so that the movable contact 160 moves close to or away from the fixed contact 150, and the breaking control of an external circuit is realized. The shunting function is realized by the one-to-one correspondence of the two moving contacts 160 and the two fixed contacts 150. When large current flows through the static contact piece 110 and the moving contact piece 120, the current is shunted with the two static contacts 150 through the two moving contacts 160, and the current of a single contact point is reduced, so that the electric power generated by the contact surface of the contact point is reduced, and the purposes of reducing contact point consumption and preventing adhesion are achieved. The end face of each static contact 150 is parallel to the end face of one movable contact 160, so that under the condition of ensuring the compactness of the relay, namely, under the condition of not increasing the action distance of the magnetic latching iron core with bidirectional action, the contact distance between the movable contact 160 and the static contact 150 is increased, namely, the contact Gap is increased, thereby being beneficial to breaking electric arcs and prolonging the electric service life of a product. The moving and static contact structure 10 of the magnetic latching direct current relay improves the current breaking performance and prolongs the electric service life.

The contact assembly 100 is used for connecting an external circuit, controlling the on-off of the external circuit and playing a role in circuit breaking. Specifically, the stationary blade 110 is connected to an external circuit by providing a stationary terminal 111, and the movable blade 120 is connected to the external circuit by providing a movable terminal 121. The stationary terminal 111 refers to a portion of the stationary blade 110 exposed from the base 200, and the movable terminal 121 refers to a portion of the movable blade 120 exposed from the base 200. The movable spring plate 130 is an action part and plays a role of connection. The movable contact piece 120 is electrically connected to or disconnected from the stationary contact piece 110 by the movable contact spring 130. The push card 140 serves as an actuating component, the push card 140 is connected with a driving component in the relay, and the push card 140 reciprocates under the driving action of the driving component. The driving assembly of the relay comprises a permanent magnet, a yoke, a winding and the like, and the specific structure and principle of the driving assembly of the relay can refer to the prior art, and are not described herein again. The push latch 140 serves to push the movable spring plate 130 toward the stationary blade 110. The movable connecting piece 120 is inserted into the pushing groove 141 and is connected with the pushing card 140 in a sliding manner, the movable connecting piece 120 is a fixed part, the movable connecting piece 120 does not move, and only the pushing card 140 slides. The pushing card 140 drives the movable spring 130 to deform, so that the movable spring 130 elastically deforms, and each movable contact 160 abuts against one fixed contact 150, thereby electrically connecting the fixed contact strip 110 with the movable contact strip 120. The fixing groove 142 is used for installing the movable spring plate 130, one end of the movable spring plate 130 is inserted into the fixing groove 142, and one end of the movable spring plate 130 is connected with one end of the movable connecting piece 120 far away from the movable terminal 121, so that the installation stability of the movable spring plate 130 is ensured.

The fixed contact piece 110 is provided with two fixed contacts 150, the movable spring 130 is provided with two movable contacts 160, and each fixed contact 150 corresponds to one movable contact 160. The double-contact structure is realized by the butt joint of each static contact 150 and a moving contact 160, and the current is divided. In order to further improve the shunting function, in one embodiment, the movable spring 130 is provided with a strip-shaped hole 131, and the two movable contacts 160 are respectively located at two sides of the strip-shaped hole 131. The opening of the strip-shaped hole 131 enables the movable spring 130 to be divided into two parts. When large current flows through the static contact piece 110 and the moving contact piece 120, the current is shunted with the two static contacts 150 through the two moving contacts 160, the current of a single contact point is reduced, the Hall force generated by the contact surface of the contact point is reduced, the repulsion phenomenon of the contact point is weakened, and therefore the electromotive force generated by the contact surface of the contact point is reduced, and the purposes of reducing contact point consumption and preventing adhesion are achieved.

Further, the end surface of each static contact 150 is parallel to the end surface of one movable contact 160, so that when the pushing clip 140 drives the movable spring 130 to move toward the static contact 110, and the static contact 150 abuts against the movable contact 160, the end surface of the static contact 150 flatly abuts against the end surface of the movable contact 160. That is, under the condition of ensuring the compactness of the relay, that is, without increasing the action distance of the magnetic latching iron core which acts bidirectionally, the contact distance between the moving contact 160 and the static contact 150 is increased, that is, the contact Gap is increased, so that the electric arc can be broken, and the electric service life of the product is prolonged.

In order to enhance the connection stability of the movable spring 130 and the movable contact 120, in one embodiment, the movable contact 120 is provided with a plurality of fixing blocks 122 at an end away from the movable terminal 121, and each fixing block 122 penetrates through the movable spring 130 and is connected with the movable spring 130. In this way, each fixing block 122 enhances the connection firmness of the movable connecting piece 120 and the movable spring piece 130, and the movable connecting piece 120 and the movable spring piece 130 are not easy to separate. Therefore, the connection stability of the movable spring plate 130 and the movable connecting piece 120 is enhanced, and the stability of electrical connection is guaranteed.

In order to reduce the electric repulsive force, in one embodiment, the movable spring plate 130 includes a plurality of sub copper sheets 132, and the sub copper sheets 132 are stacked and connected. The moving contact 160 sequentially penetrates through each sub copper sheet 132 and is connected with each sub copper sheet 132. The sub copper sheets 132 are overlapped to form the movable spring plate 130, which is beneficial to reducing the electric repulsion of the contact and weakening the repulsion phenomenon of the contact. Therefore, the electric repulsion force is reduced, and the electric service life of the product is prolonged.

In order to enhance the heat dissipation performance of the movable contact 160, in one embodiment, the contact assembly 100 further includes a first heat sink 133, the first heat sink 133 abuts against a sub-copper sheet 132 adjacent to the stationary contact 110, and the movable contact 160 penetrates through the first heat sink 133 and is connected to the first heat sink 133. In this embodiment, the first heat sink 133 is a metal copper sheet, and the first heat sink 133 plays a role of heat dissipation, so as to facilitate heat conduction and dissipation of the movable contact 160. The first heat sink 133 also increases the contact pressure. Thus, the heat dissipation performance of the movable contact 160 is improved.

In order to further enhance the heat dissipation performance of the movable contact 160, in one embodiment, the contact assembly 100 further includes a second heat sink 134, the second heat sink 134 abuts against a sub-copper sheet 132 away from the stationary contact 110, and the movable contact 160 penetrates through the second heat sink 134 and is connected to the second heat sink 134. In this embodiment, the second heat sink 134 is a metal copper plate, and the second heat sink 134 plays a role of heat dissipation, so as to facilitate heat conduction and dissipation of the movable contact 160. Thus, the heat dissipation performance of the movable contact 160 is further improved.

In order to enhance the installation stability of the movable contact 160, in one embodiment, the movable contact 160 is riveted with the first heat sink 133, the second heat sink 134 and each of the sub-copper sheets 132. Thus, the movable contact 160 is firmly mounted, and the movable contact 160 is not easy to fall off. Thus, the connection stability of the movable contact 160 is improved.

Further, in order to enhance the installation stability of the stationary contact 150, in one embodiment, the stationary contact 110 is opened with two fixing holes 112, and each stationary contact 150 is partially inserted into one fixing hole 112 and riveted with the stationary contact 110. The fixing hole 112 has a limiting and fixing function on the static contact 150, so that the static contact 150 is not easily separated from the static contact sheet 110. Therefore, the installation stability of the static contact 150 is improved, and the working stability of the moving and static contact structure of the magnetic latching direct current relay is guaranteed.

The base 200 is used to house the contact assembly 100. The base 200 plays a role in accommodation and protection, and guarantees the structural stability and the working stability of the moving and static contact structure of the magnetic latching direct current relay. The base 200 supports the stationary tab 110, the movable tab 120, and the push card 140. In order to facilitate the connection of the static terminals 111 and the moving terminals 121 to an external circuit, the two static terminals 111 and the two moving terminals 121 are exposed out of the base 200, so as to facilitate the connection with the external circuit. Therefore, the installation convenience of the moving and static contact structure of the magnetic latching direct current relay is improved.

In order to improve the fixing effect of the movable spring 130 and the movable contact piece 120, in one embodiment, the moving and static contact structure of the magnetically latching dc relay further includes a fastening bracket 300, the fastening bracket 300 has a fastening groove 310 inside, the movable spring 130 and the movable contact piece 120 are inserted into the fastening groove 310 and engaged with the fastening bracket 300, and the fastening bracket 300 is covered on the top of the base 200. That is, the movable spring plate 130 abuts against one groove wall of the fastening groove 310 of the fastening bracket 300, the movable contact piece 120 abuts against the other groove wall of the fastening groove 310 of the fastening bracket 300, and the fastening groove 310 serves to limit and fasten the movable spring plate 130 and the movable contact piece 120. Thus, the limiting and fixing effects on the movable spring plate 130 and the movable connecting piece 120 are improved.

In order to improve the assembling convenience, in one embodiment, the fastening bracket 300 is provided with two buckles 320 at two sides thereof, and the base 200 is provided with two buckle grooves 210, and each buckle 320 is inserted into one buckle groove 210 and connected with the base 200. Like this, be convenient for fastening support 300 and base 200 are connected, both ensured installing support and base 200 connection stability, realized again and dismantled the performance. Therefore, the assembly convenience is improved, and the maintainability of the moving and static contact structure of the magnetic latching direct current relay is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a magnetic latching direct current relay's sound contact structure, its characterized in that includes: the contact assembly is accommodated in the base and is connected with the base;

the contact assembly comprises a static contact piece, a dynamic spring, a pushing card, two static contacts and two dynamic contacts; the pushing card is provided with a pushing groove and a fixing groove, and the movable connecting piece is inserted into the pushing groove and is in sliding connection with the pushing card; one end of the movable spring plate is connected with the movable connecting plate, and the other end part of the movable spring plate is inserted into the fixed groove and connected with the pushing card; the static contact pieces and the movable contact spring are arranged at intervals; the two static contacts are respectively connected with the static connecting sheet, the two moving contacts are respectively connected with the moving spring, and the end surface of each static contact is parallel to and correspondingly arranged with the end surface of one moving contact; the pushing card is used for pushing the movable spring plate to move towards the static connecting plate;

the static contact piece, the dynamic spring, the push card, the two static contacts and the two dynamic contacts are contained in the base; the static connecting piece and the movable connecting piece partially penetrate through the base and are connected with the base; the static contact piece is provided with two static terminals, the movable contact piece is provided with two movable terminals, and the static terminals and the movable terminals are exposed out of the base.

2. The moving and static contact structure of a magnetically latching dc relay as claimed in claim 1, wherein the movable spring is formed with a bar-shaped hole, and the two movable contacts are respectively located at two sides of the bar-shaped hole.

3. The moving and static contact structure of a magnetically held dc relay as claimed in claim 2, wherein the moving contact piece is provided with a plurality of fixing blocks at an end thereof away from the moving terminal, and each fixing block penetrates the moving reed and is connected to the moving reed.

4. The moving and static contact structure of a magnetically held direct current relay according to claim 3, wherein the moving reed comprises a plurality of sub copper sheets, and each of the sub copper sheets is connected in an overlapping manner; the moving contact penetrates through the sub copper sheets in sequence and is connected with the sub copper sheets.

5. The moving and static contact structure of a magnetically held dc relay as claimed in claim 4, wherein said contact assembly further comprises a first heat sink abutting a said sub copper plate adjacent to said static contact piece, said moving contact extending through said first heat sink and being connected to said first heat sink.

6. The moving and static contact structure of a magnetically held dc relay as claimed in claim 5, wherein said contact assembly further comprises a second heat sink abutting a said sub copper plate away from said static contact, said moving contact penetrating said second heat sink and being connected to said second heat sink.

7. The moving and static contact structure of a magnetically held dc relay as claimed in claim 6, wherein the moving contact is riveted to the first heat sink, the second heat sink and each of the sub copper sheets, respectively.

8. The moving and static contact structure of a magnetically held dc relay as claimed in claim 1, wherein the static contact piece defines two fixing holes, and each static contact portion is inserted into one of the fixing holes and riveted to the static contact piece.

9. The moving and static contact structure of a magnetically held dc relay according to claim 1, further comprising a fastening bracket having a fastening groove therein, wherein the movable spring and the movable contact piece are inserted into the fastening groove and engaged with the fastening bracket, and the fastening bracket is covered on the top of the base.

10. The moving and static contact structure of a magnetically latching dc relay as claimed in claim 9, wherein two fastening brackets are respectively disposed at two sides of the fastening bracket, the base is formed with two fastening grooves, and each fastening bracket is inserted into one of the fastening grooves and connected to the base.

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