Clapper type electromagnetic relay

Abstract

The utility model relates to a clapper-type electromagnetic relay which comprises a base, an insulating cover, a coil, a coil leading-out piece and a first static spring, the insulating cover is located between the base and the coil, the first static spring comprises a static spring leading-out piece, a connecting part and a contact part provided with a static contact, and the connecting part is connected between the contact part and the static spring leading-out piece. The coil leading-out piece and the static spring leading-out piece penetrate through the base, the connecting part is located between the insulating cover and the base, the coil is provided with a wiring end, the coil leading-out piece is provided with a wiring part connected with the wiring end, the wiring part is located on the side, opposite to the connecting part, of the insulating cover, the insulating cover is provided with a first blocking wall, and the wiring part is located on the inner side of the first blocking wall. The contact part is located on the outer side of the first retaining wall. According to the clapper type electromagnetic relay, good electrical isolation between a strong current part (such as a first static spring) and a weak current part (such as a coil or a coil leading-out sheet) is kept by using the insulating cover, so that the purpose of improving the electrical isolation effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of relays, and in particular to a snap-on electromagnetic relay. Background Art

[0002] With the development of relay technology, relay products are widely used in household appliances, new energy vehicles and other products.

[0003] In the related art, poor electrical isolation often occurs between the strong current part (such as the static spring) and the weak current part (such as the coil or the coil lead-out piece) of the relay. Utility Model Content

[0004] Based on this, a snap-on electromagnetic relay is provided to solve the problem of how to improve the electrical isolation effect.

[0005] The present application provides a snap-on electromagnetic relay, comprising a base, a coil, a coil lead-out piece, a first static spring and an insulating cover, wherein the insulating cover is located between the base and the coil, the first static spring comprising a static spring lead-out piece, a connecting portion and a contact portion provided with a static contact, the connecting portion being connected between the contact portion and the static spring lead-out piece, the coil lead-out piece and the static spring lead-out piece both being passed through the base, the connecting portion being located between the insulating cover and the base, the coil being provided with a wiring terminal, the coil lead-out piece having a wiring portion connected to the wiring terminal, the wiring portion being located on a side of the insulating cover facing away from the connecting portion, the insulating cover having a first barrier wall, the wiring portion being located on the inner side of the first barrier wall, and the contact portion being located on the outer side of the first barrier wall, wherein the outer side of the first barrier wall is the side of the first barrier wall opposite to the coil lead-out piece.

[0006] In one embodiment, the second static spring is further provided through the base, wherein the second static spring and the first static spring both include the static spring lead-out piece, the connecting portion, and the contact portion.

[0007] And / or, the connecting portion is horizontally bent relative to the vertically arranged static spring lead-out piece, and the first static spring and the second static spring are arranged side by side in the snapping direction of the snap-on electromagnetic relay.

[0008] In one embodiment, the base is provided with a first socket, the insulating cover has a plug-in portion that cooperates with the first socket, the coil lead-out piece is passed through the plug-in portion and extends out of the base through the first socket, and a first glue dispensing groove surrounding the coil lead-out piece is formed on the side of the base facing away from the insulating cover, the first glue dispensing groove is provided with a glue injection part, the glue injection part is sealed around the coil lead-out piece, the glue injection part fills the gap between the coil lead-out piece and the side wall of the first socket, and the glue injection part is sealed against the plug-in portion.

[0009] In one embodiment, the coil includes a bracket and an enameled wire, the bracket includes a sleeve and a support flange, the enameled wire is wound around the bracket, and the bracket and the coil lead-out piece are injection-molded as one piece, so that the end of the coil lead-out piece is buried in the support flange, and the wiring portion is exposed on the inner side of the support flange, and the first retaining wall is against the outer wall of the support flange.

[0010] In one embodiment, a first slot and a through hole penetrating the bottom wall of the first slot are formed in the plug-in portion, the support flange is inserted into the first slot, and the coil lead-out piece extends out of the plug-in portion through the through hole.

[0011] In one embodiment, the insulating cover has a second barrier wall adjacent to the first barrier wall, and the supporting flange and the wiring portion are both located in a space enclosed by the first barrier wall and the second barrier wall.

[0012] In one embodiment, the snap-on electromagnetic relay also includes a yoke, an armature and a movable spring, the yoke is L-shaped, one end of the yoke is connected to the base, and the other end is matched with the armature, the coil is arranged in the space enclosed by the armature and the yoke, the movable spring is connected to the armature, and can snap-on contact with or disconnect from the contact portion under the drive of the armature; the base is provided with a first socket and a second socket, wherein the first socket is located below the position where the armature and the yoke match, and the second socket is located near the connection position between the yoke and the base, the coil lead-out piece extends out of the base through the first socket, and the static spring lead-out piece extends out of the base through the second socket.

[0013] In one embodiment, the base is provided with a fixing portion, and an end of the yoke away from the armature is inserted into the fixing portion; the insulating cover further has a third retaining wall, the fixing portion is located on the outside of the third retaining wall, the coil is located on the inside of the third retaining wall, and a portion of the surface of the third retaining wall is located on the path of creepage from the static spring lead-out piece to the coil;

[0014] And / or, the shortest distance from the first socket to the yoke is greater than the shortest distance from the second socket to the yoke, the connecting portion is horizontally bent relative to the vertically arranged static spring lead-out piece, the connecting portion is in contact with the base and extends toward the side where the dynamic spring is located, so that the contact portion corresponds to the dynamic spring.

[0015] In one embodiment, it further includes a second static spring passing through the base, the second static spring is in the shape of a straight sheet and passing through the base, the contact portion of the second static spring is located on the outside of the first baffle wall, and the contact portion of the first static spring and the contact portion of the second static spring are arranged side by side in the closing direction of the closing electromagnetic relay.

[0016] In one embodiment, the dynamic spring includes a bridge-type dynamic spring piece and two dynamic contacts connected to both ends of the bridge-type dynamic spring piece. When the dynamic spring is driven by the armature to clap with the first static spring and the second static spring, one of the dynamic contacts contacts the static contact of the first static spring, and the other dynamic contact contacts the static contact of the second static spring, so that the first static spring is connected in series with the second static spring through the bridge-type dynamic spring piece.

[0017] In one embodiment, at least one of the base and the insulating cover is provided with a retaining wall, and the retaining wall is located between the contact portion of the first static spring and the contact portion of the second static spring;

[0018] And / or, one of the insulating cover and the base is provided with a partition, and the other one is provided with a partition groove, the partition cooperates with the partition groove, the first static spring is located on one side of the partition, and the second static spring is located on the other side of the partition.

[0019] In one embodiment, a second glue dispensing groove surrounding the static spring lead-out piece is formed on a side of the base facing away from the insulating cover;

[0020] And / or, the snap-on electromagnetic relay also includes a shell, which is covered on the base, and a notch is formed at the corresponding edge position of the base, and part of the side wall of the shell extends from the edge of the base to enclose the notch to form a third glue dispensing groove.

[0021] In one embodiment, at least part of the structure of the connecting portion is a temperature-modulating structure;

[0022] Wherein, the temperature conduction path of the temperature-mitigating structure is greater than the straight-line distance from the contact portion to the static spring lead-out piece;

[0023] and / or, the thermal conductivity of at least a portion of the temperature mitigation structure is less than the thermal conductivity of the contact portion;

[0024] And / or, at least one cross-sectional area of ​​the temperature mitigation structure is smaller than any cross-sectional area of ​​the static spring lead-out piece.

[0025] In one embodiment, at least one of the following technical solutions is included:

[0026] The temperature-modulating structure includes at least two bending portions;

[0027] Alternatively, the extended shape of the temperature-modulating structure is S-shaped, a wavy line, or a broken line;

[0028] Alternatively, the temperature-mitigating structure includes a straight extension section and a bent section, and the straight extension section and the bent section are connected;

[0029] Alternatively, the temperature-modulating structure is made of brass or tin bronze, and the static spring lead-out piece is made of pure copper.

[0030] In one embodiment, the temperature relief structure is located at a position of the connecting portion connected to the static spring lead-out piece and / or the contact portion, and the cross-sectional area of ​​the temperature relief structure is smaller than the cross-sectional area of ​​the connecting portion at positions other than the temperature relief structure.

[0031] In one embodiment, the static spring lead-out piece and the contact portion are bent toward different sides relative to the connecting portion to form a first bending portion and a second bending portion located at both ends of the connecting portion, and the cross-sectional area of ​​the second bending portion is smaller than the cross-sectional area of ​​the first bending portion.

[0032] In one embodiment, at least one of the following technical solutions is also included:

[0033] The width of the first bent portion is smaller than the width of the static spring lead-out piece;

[0034] Alternatively, the width of the second bent portion is smaller than the width of the contact portion;

[0035] Alternatively, the cross-sectional area of ​​the connecting portion gradually decreases at a position close to the first bending portion;

[0036] Alternatively, the cross-sectional area of ​​the contact portion gradually decreases at a position close to the second bending portion.

[0037] The above-mentioned clap-type electromagnetic relay, on the one hand, is provided with an insulating cover between the base and the coil, and the connecting portion of the first static spring is provided between the insulating cover and the base, thereby achieving a good electrical isolation effect between the connecting portion of the first static spring and the coil; on the other hand, the insulating cover has a first barrier wall, the connection portion of the coil lead-out piece is located on the inner side of the first barrier wall, and the contact portion of the first static spring is located on the outer side of the first barrier wall, thereby utilizing the first barrier wall to achieve good electrical isolation between the connection portion of the coil lead-out piece and the contact portion of the first static spring. Subsequently, the clap-type electromagnetic relay of the present application utilizes the insulating cover to achieve good electrical isolation between the strong current part (such as the first static spring) and the weak current part (such as the coil or the coil lead-out piece), thereby achieving the purpose of improving the electrical isolation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0039] Figure 1 Schematic diagram of the three-dimensional structure of a snap-on electromagnetic relay according to one embodiment of the present application.

[0040] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of a snap-on electromagnetic relay from another perspective is shown.

[0041] Figure 3 for Figure 1 The side view structural diagram of the snap-on electromagnetic relay is shown.

[0042] Figure 4 for Figure 3 The cross-sectional structure diagram of the snap-on electromagnetic relay along line II is shown.

[0043] Figure 5 for Figure 1 The exploded structure diagram of the snap-on electromagnetic relay is shown.

[0044] Figure 6 for Figure 5 The figure shows the assembly structure diagram of the static spring and the base of the snap-on electromagnetic relay.

[0045] Figure 7 for Figure 5 The diagram shows a top view of the structure of the insulating cover of the snap-on electromagnetic relay assembled with a base equipped with a static spring.

[0046] Figure 8 for Figure 7 A schematic cross-sectional view of a partial structure of a snap-on electromagnetic relay along line II-II is shown.

[0047] Figure 9 Schematic diagram of the cross-sectional structure of a snap-on electromagnetic relay in an assembled state according to one embodiment of the present application.

[0048] Figure 10 for Figure 9 The diagram shows a cross-sectional structure of the first and second glue dispensing grooves of the snap-on electromagnetic relay when they are filled with glue.

[0049] Figure 11 This is a schematic cross-sectional view of a snap-on electromagnetic relay according to another embodiment of the present application.

[0050] Figure 12 This is a structural schematic diagram of a snap-on electromagnetic relay according to an embodiment of the present application, in which a movable spring and an armature are integrally formed through an insulating component.

[0051] Figure 13 for Figure 12 The diagram shows a front structural diagram of a snap-type electromagnetic relay in which a movable spring and an armature are integrally formed through an insulating component.

[0052] Figure 14 for Figure 13 The cross-sectional structure diagram of the snap-on electromagnetic relay along line II-II is shown.

[0053] Description of reference numerals:

[0054] 10. Base; 11. First jack; 13. Second jack; 15. First glue dispensing slot; 151. Glue injection part; 17. Second glue dispensing slot; 19. Third glue dispensing slot; 101. Retaining wall; 103. Partition; 105. Fixing part; 105a. Second slot; 20. Magnetic circuit; 21. Coil; 21a. Bracket; 21a1. Support flange; 21b. Terminal; 211. Enameled wire; 23. Armature; 23a. Bottom end; 23b. Inclined surface; 23c. First through-hole; 25. Yoke; 25a. Insert; 26. Iron core; 27. Elastic member; 29. ​​Coil lead-out piece; 29a. Wiring part; 30, contact part; 31, movable spring; 31a, movable contact; 31b, second through-hole; 33, static spring; 33a, contact part; 33b, static spring lead-out piece; 33c, connecting part; 331, first bending part; 333, second bending part; 40, insulating component; 41, fitting part; 43, raised part; 45, extending part; 47, embedded part; R1, first creepage path; R2, second creepage path; 50, insulating cover; 51, plug-in part; 51a, first slot; 51b, through-hole; 53, first barrier wall; 54, second barrier wall; 55, partition; 57, third barrier wall; 60, housing. DETAILED DESCRIPTION

[0055] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0056] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0057] The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions are for illustrative purposes only and do not represent the only implementations.

[0058] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0059] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0060] See Figure 1 and Figure 2 As shown, an embodiment of the present application provides a snap-on electromagnetic relay comprising a base 10, a magnetic circuit portion 20, and a contact portion 30. The base 10 provides a mounting support for the magnetic circuit portion 20 and the contact portion 30; the magnetic circuit portion 20 is used to drive the contact portion 30 to make or break contact through electromagnetic action.

[0061] Combine Figures 3 to 5As shown, the magnetic circuit portion 20 is mounted on the base 10, and the contact portion 30 includes a movable spring 31 and a static spring 33. The magnetic circuit portion 20 includes a coil 21, an armature 23, and a yoke 25. The armature 23 is connected to the yoke 25 and is used to drive the movable spring 31 to engage or disengage with the static spring 33.

[0062] The yoke 25 may be L-shaped, with one end of the yoke 25 connected to the base 10 and the other end cooperating with the armature 23. The armature 23 and the yoke 25 together enclose a space above the base 10 for arranging the coil 21. In some embodiments, the coil 21 includes a bracket 21a and an enameled wire 211. The magnetic circuit portion 20 further includes an iron core 26. The iron core 26 is connected to the yoke 25. The connection method between the iron core 26 and the yoke 25 includes, but is not limited to, welding or riveting. The bracket 21a has a sleeve for winding the enameled wire 211. The sleeve is sleeved on the iron core 26, so that the enameled wire 211 wound on the sleeve surrounds the iron core 26. When current passes through the enameled wire 211, the iron core 26 can enhance the magnetic field strength to better magnetically attract the armature 23 to move relative to the yoke 25. As can be understood, in a snap-action relay, when current flows through the coil 21, it creates a magnetic field that attracts the armature 23. Thus, by controlling the power supply to the coil 21, the armature 23 can be moved relative to the yoke 25, driving the movable spring 31 into snapping contact with the static spring 33. An elastic member 27 is disposed between the yoke 25 and the armature 23, and the elastic member 27 includes, but is not limited to, a spring or an elastic cord. When the power supply to the coil 21 is removed, the coil 21 no longer exerts a magnetic attraction on the armature 23. At this point, the elastic member 27 forces the armature 23 to return relative to the yoke 25, breaking contact between the armature 23 and the movable spring 31 and the static spring 33.

[0063] See again Figure 1 and Figure 2 As shown, the static spring 33 includes a contact portion 33a provided with a static contact, which is used to make or break contact with the dynamic spring 31. The portion of the dynamic spring 31 that is used to make contact with the static contact can be referred to as the "dynamic contact 31a".

[0064] The static spring 33 also includes a static spring lead-out piece 33b and a connecting portion 33c. The static spring lead-out piece 33b is passed through the base 10, so that the connecting portion 33c extends from the base 10 and is connected between the contact portion 33a and the static spring lead-out piece 33b. It should be noted that the number of static springs 33 can be 1 or 2, and is not limited here. In some embodiments, when the number of static springs 33 is 1, the static spring 33 can be called a "first static spring". In some embodiments, such as Figure 1 and Figure 2As shown, if there are two static springs 33, one of the static springs 33 can be referred to as the "first static spring" and the other static spring 33 can be referred to as the "second static spring." The structures of the first and second static springs can be the same or different. For example, the static springs 33 include a first static spring and a second static spring. Both the first and second static springs are disposed through the base 10 and each includes a contact portion 33a, a static spring lead-out piece 33b, and a connecting portion 33c.

[0065] The first static spring and the second static spring can be arranged side by side in the snapping direction of the snapping electromagnetic relay, so that the first static spring and the second static spring are arranged compactly, which is conducive to miniaturization of the snapping electromagnetic relay.

[0066] The clap-type electromagnetic relay also includes a coil lead-out piece 29 electrically connected to the coil 21. The coil 21 and the coil lead-out piece 29 can be connected by winding and soldering. For example, the coil lead-out piece 29 has a connection portion 29a, and the coil 21 leads to a terminal 21b, which is connected to the connection portion 29a, thereby connecting the coil 21 to the coil lead-out piece 29.

[0067] Combine Figure 4 and Figure 5 As shown, the snap-on electromagnetic relay also includes an insulating cover 50. The insulating cover 50 is located between the base 10 and the coil 21, and the connecting portion 33c is located between the insulating cover 50 and the base 10. That is, the insulating cover 50 covers the connecting portion 33c. This can achieve isolation between the connecting portion 33c and the coil 21 located above the insulating cover 50, thereby ensuring good electrical isolation between the connecting portion 33c and the coil 21. The wiring portion 29a is located on the side of the insulating cover 50 facing away from the connecting portion 33c, thereby utilizing the insulating cover 50 to achieve electrical isolation between the wiring portion 29a and the connecting portion 33c. The insulating cover 50 has a first retaining wall 53, which is sandwiched between the wiring portion 29a and the contact portion 33a. The first retaining wall 53 increases the creepage distance and electrical clearance between the wiring portion 29a and the contact portion 33a, thereby achieving electrical isolation between the coil lead-out piece 29 and the static spring 33. It should be noted that the connection portion 29a of the coil lead-out piece 29 is located on the inner side of the first retaining wall 53, and the contact portion 33a is located on the outer side of the first retaining wall 53. The outer side of the first retaining wall 53 is the side of the first retaining wall 53 opposite to the coil lead-out piece 29. Since the contact portion 33a is located on the outer side of the first retaining wall 53, the first retaining wall 53 does not block the contact portion 33a from contacting the dynamic spring 31.

[0068] Combine Figures 5 and 6 As shown, the base 10 is provided with a first plug hole 11 , the insulating cover 50 has an inserting portion 51 , the coil lead-out piece 29 is inserted into the inserting portion 51 , and the coil lead-out piece 29 passes through the inserting portion 51 and extends out of the base 10 through the first plug hole 11 .

[0069] Combine Figures 7 to 9 As shown, a glue dispensing groove (hereinafter referred to as "first glue dispensing groove 15") surrounding the coil lead-out piece 29 is formed on the side of the base 10 facing away from the insulating cover 50. Figure 10 As shown, the first glue dispensing groove 15 is provided with a glue injection part 151, and the glue injection part 151 is sealed and covered around the coil lead-out piece 29. The glue injection part 151 fills the gap between the coil lead-out piece 29 and the side wall of the first plug hole 11, and the glue injection part 151 is sealed and abutted with the plug-in part 51. In this embodiment, by dispensing glue on the first glue dispensing groove 15, the glue is solidified to form the glue injection part 151, so that the glue injection part 151 can not only increase the connection stability between the insulating cover 50 and the base 10, but also, the glue injection part 151 seals the gap between the coil lead-out piece 29 and the side wall of the first plug hole 11, and the glue injection part 151 is sealed and abutted with the plug-in part 51, so that the part of the coil lead-out piece 29 exposed from the plug-in part 51 is completely isolated from the part of the static spring 33 located on the inner side of the base 10. Therefore, this structural setting increases the creepage distance between the coil lead-out piece 29 and the static spring 33, further improving the electrical isolation effect.

[0070] In an embodiment in which the coil 21 includes a bracket 21a and an enameled wire 211, the bracket 21a includes a support flange 21a1. The bracket 21a and the coil lead-out piece 29 are integrally injection molded, such that the end of the coil lead-out piece 29, on which the wiring portion 29a is provided, is embedded in the support flange 21a1. Thus, when the coil lead-out piece 29 is mated with the plug-in portion 51 of the insulating cover 50, the support flange 21a1 is inserted into the plug-in portion 51 along with the coil lead-out piece 29. In this embodiment, the wiring portion 29a is exposed on the inner side of the support flange 21a1, and the first retaining wall 53 abuts against the outer wall of the support flange 21a1. Thus, the first retaining wall 53 is compactly arranged with the support flange 21a1, and the first retaining wall 53 can increase the creepage distance from the wiring portion 29a to the contact portion 33a.

[0071] Further, combined with Figure 8 As shown, a first slot 51a and a through hole 51b passing through the bottom wall of the first slot 51a are formed in the plug-in portion 51, the support flange 21a1 is inserted into the first slot 51a, and the coil lead-out piece 29 extends out of the plug-in portion 51 through the through hole 51b. The plug-in portion 51 cooperates with the first plug-in hole 11. In this way, when the glue injection part 151 is set at the first plug-in hole 11, the glue of the glue injection part 151 can enter the first slot 51a through the through hole 51b to further improve the electrical isolation effect between the coil lead-out piece 29 and the static spring 33.

[0072] The insulating cover 50 has a second barrier wall 54 adjacent to the first barrier wall 53, and the support flange 21a1 and the wiring portion 29a are both located in the space enclosed by the first barrier wall 53 and the second barrier wall 54. In this way, the support flange 21a1 and the wiring portion 29a are set in the space enclosed by the first barrier wall 53 and the second barrier wall 54, and the creepage distance from the wiring portion 29a to the connection portion 33c and the contact portion 33a of the static spring 33 located outside the space enclosed by the first barrier wall 53 and the second barrier wall 54 is increased, thereby improving the electrical isolation effect.

[0073] Combine Figure 9 and Figure 10 As shown, another glue dispensing groove (hereinafter referred to as "second glue dispensing groove 17") surrounding the static spring lead-out piece 33b is formed on the side of the base 10 facing away from the insulating cover 50. In this way, glue can be filled in the second glue dispensing groove 17. After the glue is cured, the stability of the static spring lead-out piece 33b at the first jack 11 can be increased, so that the static spring lead-out piece 33b is not easily separated from the base 10.

[0074] Combine Figure 11 As shown, the snap-on electromagnetic relay further includes a housing 60, which is mounted on the base 10. The housing 60 provides dustproof and waterproof protection for the magnetic circuit portion 20 and the contact portion 30 located on the base 10. Furthermore, a portion of the sidewall of the housing 60 extends from the edge of the base 10, and a notch is formed at the corresponding edge of the base 10, so that the portion of the housing 60 extending from the edge of the base 10 encloses the notch to form another glue dispensing groove (hereinafter referred to as the "third glue dispensing groove 19"). In this way, the housing 60 can be connected to the base 10 by filling the third glue dispensing groove 19 with glue.

[0075] In some embodiments, the housing 60 and the base 10 may be connected by snap-fit ​​connection or screws. The connection method between the housing 60 and the base 10 is not limited here.

[0076] The electrical isolation structure of the insulating cover 50 for the strong current part and the weak current part is not limited to the above-mentioned structure.

[0077] Recombination Figure 5 As shown, in some embodiments, at least one of the base 10 and the insulating cover 50 is provided with a retaining wall 101, and the retaining wall 101 is located between the contact portions 33a of the two static springs 33, thereby utilizing the retaining wall 101 to achieve high-voltage isolation between the contact portions 33a of the two static springs 33.

[0078] One of the insulating cover 50 and the base 10 is provided with a partition 55, while the other is provided with a partition groove 103. The partition 55 cooperates with the partition groove 103 and is located between the connecting portions 33c of the two static springs 33. This interaction between the partition 55 and the partition groove 103 provides high-voltage isolation between the connecting portions 33c of the two static springs 33. It is understood that even if the two static springs 33 have different structures, that is, the first and second static springs have different structures, in some embodiments, the partition 55 can still achieve electrical isolation between the first and second static springs, even if the first static spring is located on one side of the partition 55 and the second static spring is located on the other side of the partition.

[0079] Combine Figure 3 and Figure 5 As shown, in some embodiments, the base 10 is provided with a fixing portion 105, which is provided with a second slot 105a. The end of the yoke 25 away from the armature 23 is provided with an insert 25a, which is inserted into the second slot 105a, thereby ensuring a stable connection between the yoke 25 and the base 10. At the same time, through this plug-in fit between the fixing portion 105 and the insert 25a, the fixing portion 105 can cover the insert 25a, further increasing the creepage distance between the yoke 25 and the static spring lead 33b of the static spring 33.

[0080] The insulating cover 50 also has a third barrier wall 57, the fixing portion 105 is located on the outside of the third barrier wall 57, the coil 21 is located on the inside of the third barrier wall 57, and part of the surface of the third barrier wall 57 is located on the path of creepage from the static spring lead-out piece 33 to the coil 21, thereby utilizing the third barrier wall 105 to further improve the electrical isolation effect between the static spring lead-out piece 33 and the coil 21.

[0081] In some embodiments, the base 10 is provided with a first socket 11 and a second socket 13. It is understood that after the yoke 25 and the movable spring 31 are installed on the base 10 along with the armature 23, the first socket 11 is located below the position where the armature 23 and the yoke 25 fit together, and the second socket 13 is located near the connection position between the yoke 25 and the base 10. For a structure in which the movable spring 31 contacts the static spring 33 by snapping together, the various parts of the snap-fit ​​electromagnetic relay meet the requirements of the corresponding functional design in a miniaturized structural design, with the components fitting tightly together without wasting space. Since the second socket 13 is located near the connection position between the yoke 25 and the base 10, the shortest distance from the second socket 13 to the yoke 25 is shorter than the shortest distance from the first socket 11 to the yoke 25.

[0082] In order to facilitate further understanding of the technical solution of the clap-type electromagnetic relay of the present application, a clap-type electromagnetic relay in the conventional technology is described here as a comparative example.

[0083] In conventional technology, the coil lead-out piece 29 connected to the coil 21 is inserted into the second socket 13, and the static spring 33 is inserted into the first socket 11. Under this structural design, the coil lead-out piece 29 is short from the connection position between the yoke 25 and the base 10. Therefore, the electrical clearance between the coil lead-out piece 29 and the yoke 25 is small. In order to meet the creepage requirements, it is necessary to increase the distance from the coil lead-out piece 29 to the connection position between the yoke 25 and the base 10 or to set an insulating structure. The inventors found that this practice of increasing the distance from the coil lead-out piece 29 to the connection position between the yoke 25 and the base 10 or setting an insulating structure will result in a lack of compactness between the components, which is not conducive to the miniaturization of the snap-on electromagnetic relay.

[0084] In this regard, in the snap-on electromagnetic relay of the present application, the static spring lead-out piece 33b extends out of the base 10 through the second socket 13, and the coil lead-out piece 29 extends out of the base 10 through the first socket 11. Since the shortest distance from the second socket 13 to the yoke 25 is shorter than the shortest distance from the first socket 11 to the yoke 25, that is, the shortest distance from the first socket 11 to the yoke 25 is longer than the shortest distance from the second socket 13 to the yoke 25, compared to the coil lead-out piece 29 extending out of the base 10 from the second socket 13, in the embodiment of the present application, the coil lead-out piece 29 extends out of the base 10 from the first socket 11, thereby increasing the distance from the coil lead-out piece 29 to the yoke 25, thereby increasing the creepage distance and / or electrical clearance.

[0085] It should be noted that, due to this structural setting, without changing the setting position of the first hole 11 and the second hole 13 on the base 10 and the structural setting of the yoke 25, the armature 23 and the movable spring 31, it is only necessary to adjust the setting position of the coil lead-out piece 29 so that the coil lead-out piece 29 is passed through the first hole 11, so as to achieve the purpose of increasing the creepage distance and / or electrical clearance between the movable spring 31 and the coil lead-out piece 29. Therefore, the structural setting of the present application can take into account the miniaturization of the clap-type electromagnetic relay while increasing the creepage distance and / or electrical clearance, which is conducive to expanding the application of the clap-type electromagnetic relay in higher voltage fields.

[0086] There are two static springs 33 and two coil lead-out tabs 29. The base 10 is provided with two first insertion holes 11 and two second insertion holes 13. In this embodiment, the two coil lead-out tabs 29 are respectively inserted into the two first insertion holes 11. The two static springs 33 are arranged side by side in a direction perpendicular to the closing direction of the armature 23, and the static spring lead-out tabs 33b of the two static springs 33 are respectively inserted into the two second insertion holes 13.

[0087] Combine Figure 5 and Figure 6As shown, in some embodiments, the connecting portion 33c is horizontally bent relative to the vertically arranged static spring lead-out piece 33b, so that when the static spring lead-out piece 33b extends downward from the base 10, the static spring lead-out piece 33b is in contact with the base 10 and extends toward the side where the dynamic spring 31 is located, so that the static contact and the dynamic spring 31 are arranged correspondingly to ensure that the dynamic spring 31 can contact the static contact or disconnect the contact when it snaps together.

[0088] It should be noted that because the connecting portion 33c extends in contact with the base 10, while the static spring lead 33b remains extended from the base 10, the connecting portion 33c itself also serves to lengthen the heat conduction path between the contact portion 33a and the static spring lead 33b. This allows the contact portion 33a to transfer heat to the static spring lead 33b via the connecting portion 33c in a sudden cooling environment, where the load device experiences a low temperature. By extending the heat conduction path via the connecting portion 33c, the static spring 33 slows down heat loss from the contact portion 33a, thereby reducing the chance of frost or ice forming on the static contact of the contact portion 33a due to a rapid temperature drop.

[0089] In some embodiments, at least a portion of the connection portion 33c is configured as a temperature-reducing structure. In this embodiment, since at least a portion of the connection portion 33c is configured as a temperature-reducing structure, the temperature-reducing structure can be used to slow the rate of temperature drop of the contact portion 33a in a sudden cold environment, thereby reducing the chance of frost or ice forming on the contact portion 33a due to a rapid temperature drop. This ensures that the static contact on the contact portion 33a maintains good electrical contact with the movable contact 31a on the dynamic spring 31 of the relay, allowing the relay to continue to operate normally in a sudden cold environment, thereby improving the performance of the relay in a sudden cold environment.

[0090] Continue to combine Figure 5 and Figure 6 As shown, the temperature conduction path of the temperature-mitigating structure is greater than the straight-line distance from the contact portion 33c to the static spring lead-out piece 33b. Thus, the temperature-mitigating structure lengthens the heat conduction path between the contact portion 33c and the static spring lead-out piece 33b, thereby slowing down heat loss from the contact portion 33a and, in turn, reducing the chance of frost or ice forming on the contact portion 33a due to a rapid temperature drop. In some embodiments, the thermal conductivity of at least a portion of the temperature-mitigating structure is lower than that of the contact portion 33a. Thus, the temperature-mitigating structure utilizes this lower thermal conductivity to slow down heat loss from the contact portion 33a, thereby reducing the chance of frost or ice forming on the static contact point on the contact portion 33a due to a rapid temperature drop.

[0091] In some embodiments, the cross-sectional area of ​​at least one portion of the temperature-mitigating structure is smaller than the cross-sectional area of ​​any other portion of the static spring lead-out piece 33b. Because heat conduction efficiency is slower at locations with smaller cross-sectional areas than at locations with larger cross-sectional areas, in this embodiment, by setting the cross-sectional area of ​​at least one portion of the temperature-mitigating structure smaller than the cross-sectional area of ​​any other portion of the static spring lead-out piece 33b, the temperature drop rate of the contact portion 33a is slowed, thereby reducing the chance of frost or ice forming on the contact portion 33a due to a rapid temperature drop.

[0092] Furthermore, in some embodiments, the temperature-reducing structure is located at the location of the connection portion 33c where it connects to the static spring lead-out piece 33b and / or the contact portion 33a, and the cross-sectional area of ​​the temperature-reducing structure is smaller than the cross-sectional area of ​​the connection portion 33c at locations other than the temperature-reducing structure. In this embodiment, by providing the temperature-reducing structure at the location of the connection portion 33c where it connects to the static spring lead-out piece 33b and / or the contact portion 33a, and by setting the cross-sectional area of ​​the temperature-reducing structure to be smaller than the cross-sectional area of ​​the connection portion 33c at locations other than the temperature-reducing structure, the rate of temperature drop of the contact portion 33a can be slowed, thereby reducing the chance of the static contact on the contact portion 33a experiencing an excessively rapid temperature drop and resulting in frost or ice formation.

[0093] In some embodiments, the temperature-mitigating structure includes at least two bends to lengthen the heat conduction path, thereby slowing down the heat loss of the contact portion 33a, and thereby reducing the probability of frost or ice forming on the static contact point on the contact portion 33a due to a rapid temperature drop.

[0094] In some embodiments, the temperature easing structure is made of a material with low thermal conductivity, such as brass, tin bronze, etc. The static spring lead-out piece 33b of the static spring 33 can be made of pure copper, which is not limited here.

[0095] In some embodiments, the extended shape of the temperature-mitigating structure includes but is not limited to an S-shape, a wavy line, or a broken line, thereby lengthening the heat conduction path and reducing the probability of frost or ice forming due to a rapid temperature drop at the static contact point on the contact portion 33a.

[0096] In some embodiments, the temperature-mitigating structure includes a straight extension section and a bent section, which are connected to each other. In some embodiments, the temperature-mitigating structure can also be formed by splicing material sections of different shapes, and the splicing method can be welding or riveting, which is not limited here.

[0097] When the temperature-mitigating structure is only a portion of the connecting portion 33c, it can be connected to the remaining portion of the connecting portion 33c by welding, riveting, or integral molding. Of course, the entire static spring 33 can be an integrally molded structure, including but not limited to bending, casting, or 3D printing. The processing method of the static spring 33 is not limited here.

[0098] Continue to combine Figure 6 As shown, in some embodiments, the static spring 33 has a double-bend structure, that is, it has two bends. Specifically, the connection portion 33c of the static spring 33 is bent relative to the static spring lead-out piece 33b (this bend is referred to as the "first bend 331"), and the contact portion 33a of the static spring 33 is bent relative to the connection portion 33c (this bend is referred to as the "second bend 333"). When the static spring 33 is mated with the base 10, the connection portion 33c abuts the base 10, while the static spring lead-out piece 33b extends through the base 10 to be exposed, thereby adapting the static spring lead-out piece 33b to the needs of connecting to an electrical load. The contact portion 33a and the static spring lead-out piece 33b are bent toward different sides relative to the connecting portion 33c, so that the static spring lead-out piece 33b passes downward through the base 10, and the contact portion 33a extends upward relative to the base 10, so that the contact portion 33a can better correspond to the moving contact 31a of the movable spring 31. Then, when the movable spring 31 is driven by the armature 23 to snap together, the moving contact 31a and the contact portion 33a are in stable contact in the snap-fit ​​direction.

[0099] Furthermore, the cross-sectional area of ​​the second bend 333 is smaller than that of the first bend 331. Understandably, when the first bend 331 and the second bend 333 are made of the same material, their thermal conductivity is the same. Thermal conductivity, also known as thermal conductivity coefficient or thermal conductivity, is a physical quantity that indicates a material's ability to conduct heat, i.e., a measure of a substance's thermal conductivity. Since the first bend 331 and the second bend 333 are made of the same material and therefore have the same thermal conductivity, a larger cross-sectional area means more heat energy is transferred per unit time, while a smaller cross-sectional area means less heat energy is transferred per unit time. Therefore, in this embodiment, the cross-sectional area of ​​the second bend portion 333 is set to be smaller than the cross-sectional area of ​​the first bend portion 331, which is beneficial to slowing down the flow rate of heat in the contact portion 33a located near the second bend portion 333, and is beneficial to reducing the temperature change rate of the contact portion 33a, thereby reducing the probability of frost or ice on the static contact on the contact portion 33a, so as to maintain good electrical contact between the static contact on the contact portion 33a and the dynamic contact 31a on the dynamic spring 31.

[0100] The width of the first bent portion 331 is smaller than the width of the static spring lead-out piece 33b. In this way, when the external ambient temperature drops suddenly, the first bent portion 331 with a smaller width can reduce the heat transferred to the static spring lead-out piece 33b, that is, it can slow down the efficiency of heat transfer from the end where the contact portion 33a is located to the static spring lead-out piece 33b, thereby reducing the heat loss rate of the contact portion 33a, thereby reducing the probability of frost or ice forming on the static contact on the contact portion 33a.

[0101] The width of the second bent portion 333 is smaller than that of the contact portion 33a. This can reduce heat loss from the end where the contact portion 33a is located through the second bent portion 333, thereby reducing the heat loss rate of the contact portion 33a and reducing the probability of frost or ice forming on the contact portion 33a.

[0102] The cross-sectional area of ​​the connecting portion 33c gradually decreases near the first bend 331, and / or the cross-sectional area of ​​the contact portion 33a gradually decreases near the second bend 333. This arrangement reduces the transfer of heat from the contact portion 33a toward the static spring lead 33b, slowing the temperature drop of the contact portion 33a and thus reducing the chance of frost or ice forming on the static contact of the contact portion 33a due to a rapid temperature drop.

[0103] In addition, the cross-sectional area of ​​the first bend portion 331 is smaller than the cross-sectional area of ​​the connection portion 33c, which can not only reduce the heat transfer from the inner cavity of the relay to the outside, but also form an ice point at the position of the connection portion 33c close to the first bend portion 331, that is, the position of the connection portion 33c with a relatively larger cross-sectional area is used to consume the water vapor in the sealed cavity of the relay, and frost or ice appears first. By reducing the water vapor in the sealed cavity of the relay, the probability of frost or ice forming on the contact portion 33a is further reduced.

[0104] It should be noted that the static spring 33 includes a first bend 331 and a second bend 333, and both the first bend 331 and the second bend 333 refer to the locations where the static spring 33 is bent. Since both the static spring lead tab 33b and the contact portion 33a are bent relative to the connecting portion 33c, this means that both ends of the connecting portion 33c extend to the first bend 331 and the second bend 333, respectively. Therefore, in this embodiment, the cross-sectional area of ​​the connecting portion 33c decreases near the first bend 331, which can be understood as the cross-sectional area of ​​the connecting portion 33c adjacent to the first bend 331 gradually decreasing. Correspondingly, the cross-sectional area of ​​the contact portion 33a decreases near the second bend 333, which can be understood as the cross-sectional area of ​​the contact portion 33a adjacent to the second bend 333 gradually decreasing.

[0105] In some embodiments, a bridge structure is adopted in the snap-on electromagnetic relay, that is, the dynamic spring 31 realizes the series connection between the two static springs 33. Figure 2 and Figure 6 As shown, the movable spring 31 includes two movable contacts 31a. Specifically, the movable spring 31 comprises a bridge-shaped movable spring piece, with the two movable contacts 31a connected to the ends of the bridge-shaped movable spring piece. In an embodiment in which two static springs 33 (i.e., a first static spring and a second static spring) are disposed on the base 10 and each includes a connecting portion 33c, the contact portions 33a of the two static springs 33 correspond to the two movable contacts 31a, respectively. Thus, when the movable spring 31, driven by the armature 23, engages the two static springs 33, the two movable contacts 31a of the movable spring 31 come into contact with the static contacts of the two static springs 33, respectively, thereby connecting the two static springs 33 in series. This bridge-shaped structure directly divides the load voltage, reducing the voltage between each set of movable contacts 31a and the static contacts. Consequently, the contact gap in the contact portion 30 is the sum of the contact gaps between the two sets of movable contacts 31a and the static contacts. This is different from the related art in which a parallel structure is formed by one dynamic spring 31 corresponding to one static spring 33. Based on the fact that the voltage between each group of contacts does not change (the voltage borne by each group is equal to the load voltage), the clap-type electromagnetic relay of this embodiment increases the contact gap, thereby improving the arc-breaking ability, so as to improve its performance in high-voltage applications.

[0106] In some embodiments, the second static spring can have a different structure than the first static spring. For example, the second static spring can be in the form of a straight sheet and pass through the base 10. The contact portion of the second static spring is located outside the first retaining wall 53. The contact portions of the first static spring and the second static spring are arranged side by side in the snapping direction of the snapping electromagnetic relay. In this way, the contact portions of the first and second static springs can contact the two movable contacts 31a of the movable spring 31, thereby achieving a series connection between the first and second static springs.

[0107] Combine Figures 12 to 14 As shown, in some embodiments, the movable spring 31 and the armature 23 are integrally injection-molded through the insulating component 40 to reduce the assembly process between the movable spring 31 and the armature 23 and improve production efficiency.

[0108] The insulating component 40 has a fitting portion 41 and a protrusion 43 formed in one piece. The fitting portion 41 covers the side of the armature 23 facing the movable spring 31 and covers the bottom end 23a of the armature 23 (that is, the end away from the yoke 25). The protrusion 43 is connected to the side of the fitting portion 41 facing away from the armature 23. Part of the structure of the movable spring 31 is buried in the protrusion 43, and the part of the movable spring 31 exposed from the protrusion 43 is spaced apart from the fitting portion 41.

[0109] In this embodiment, since the protrusion 43 protruding from the fitting portion 41 spaces the portion of the movable spring 31 exposed from the protrusion 43 and the fitting portion 41, the distance between the movable spring 31 and the armature 23 can be maintained unchanged to take into account the miniaturization of the snap-fit ​​electromagnetic relay. At the same time, the extended surface of the protrusion 43 of the insulating component 40 and the fitting portion 41 increases the creepage distance between the movable spring 31 and the armature 23, so that the creepage distance between the coil 21 (weak current part) in the magnetic circuit part 20 through the armature 23 (conductor) to the movable spring 31 (strong current part) can more easily meet the electrical isolation requirements of strong current and weak current, so as to meet the use needs of the snap-fit ​​electromagnetic relay in a high voltage environment.

[0110] Furthermore, the insulating component 40 includes an extension portion 45 connected to the contact portion 41. The extension portion 45 extends beyond the bottom end 23a of the armature 23 along the extension direction of the contact portion 41. In this embodiment, the extension of the extension portion 45 along the extension direction of the contact portion 41 further increases the creepage distance between the side of the movable spring 31 facing the armature 23 and the side of the armature 23 facing the movable spring 31.

[0111] For ease of understanding, the following Figure 14 Taking the insulating component 40 as an example in which the movable spring 31 and the armature 23 are integrally injection-molded, the structure of the snap-on electromagnetic relay is further described.

[0112] Combine Figure 14 As shown, the insulating component 40 is formed with a first creepage path R1 and a second creepage path R2. Figure 14 The first creepage path R1 is indicated by a dotted arrow, and the second creepage path R2 is indicated by a solid arrow. Specifically, the first creepage path R1 extends from the side of the movable spring 31 facing away from the armature 23, around a portion of the surface of the protrusion 43, and to the side of the armature 23 facing the movable spring 31. The second creepage path R2 extends from the side of the movable spring 31 facing the armature 23, along the surface of the insulating component 40, to the side of the armature 23 facing away from the movable spring 31. The lengths of both the first creepage path R1 and the second creepage path R2 are greater than or equal to 10 mm. The electrical clearance between the movable spring 31 and the armature 23 is greater than or equal to 5.5 mm. Through this structural setting, the creepage distance is increased by using the protrusion 43 to space the dynamic spring 31 and the fitting portion 41. While maintaining the miniaturization of the structure, the creepage distance (i.e., the length of the shortest creepage path in the creepage path) and the electrical gap between the dynamic spring 31 and the armature 23 can both meet the creepage safety requirements under higher voltage levels (for example, 1000V voltage level).

[0113] Continue reading Figure 14As shown, the bottom end 23a of the armature 23 is formed with a sloped surface 23b. As it moves away from the raised portion 43, the gap between the portion of the abutment portion 41 that covers the sloped surface 23b and the movable spring 31 gradually increases. This allows the abutment portion 41 to extend at an angle away from the movable spring 31. This inclined arrangement allows the abutment portion 41 to extend longer while maintaining its vertical height. This structural arrangement, while maintaining the overall compactness of the connection between the armature 23 and the movable spring 31, utilizes the sloped surface 23b to increase the creepage distance between the movable spring 31 and the armature 23 on the surface of the abutment portion 41.

[0114] It can be understood that in an embodiment where the insulating component 40 includes an extension portion 45 connected to the fitting portion 41, since the extension direction of the extension portion 45 is consistent with the extension direction of the fitting portion 41, the extension portion 45 serves as an extension of the fitting portion 41. Therefore, the fitting portion 41 is set so that the gap between it and the dynamic spring 31 gradually increases in the direction away from the protrusion 43, and the extension portion 45 also extends in a direction gradually away from the dynamic spring 31, which is conducive to maintaining miniaturization while increasing the creepage distance between the dynamic spring 31 and the armature 23.

[0115] There is no limitation on the dimensions of the parts of the insulating component 40, such as the fitting portion 41, the protruding portion 43 and the extending portion 45. As long as the dimensions of the insulating component 40 meet the corresponding creepage requirements, the insulating component 40 in the snap-fit ​​electromagnetic relay of the present application can be used to injection-mold the movable spring 31 and the armature 23 into one piece, thereby increasing the creepage distance between the movable spring 31 and the armature 23 while taking into account the requirements of miniaturization design.

[0116] Continue to combine Figure 14 As shown, in some embodiments, a first through-hole 23c is provided in the middle of the armature 23, and the insulating component 40 includes an engaging portion 47 formed on the side of the abutment portion 41 facing away from the dynamic spring 31. The engaging portion 47 engages with the first through-hole 23c. In this embodiment, the engagement between the first through-hole 23c and the engaging portion 47 helps improve the abutment stability between the abutment portion 41 and the armature 23, thereby reducing the chance of the abutment portion 41 falling off the armature 23.

[0117] A second through-hole 31b is provided at the end of the movable spring 31. Since the end of the movable spring 31 is embedded in the raised portion 43, a portion of the raised portion 43 is embedded in the second through-hole 31b. This increases the stability of the connection between the movable spring 31 and the raised portion 43, making it difficult for the movable spring 31 to fall off the raised portion 43.

[0118] In the thickness direction of the contact portion 41, the portion of the dynamic spring 31 embedded in the raised portion 43 overlaps with the interlocking portion 47. In other words, the portion of the dynamic spring 31 that is bonded to the raised portion 43 covers the interlocking portion 47. In this embodiment, both the raised portion 43 and the interlocking portion 47 provide a buffering effect. For example, when the armature 23 drives the dynamic spring 31 into contact with the static spring 33, the static spring 33 generates a reaction force on the dynamic spring 31. The force exerted on the dynamic spring 31 is buffered by the raised portion 43 and the interlocking portion 47, thereby ensuring the stability of the connection between the dynamic spring 31 and the armature 23 during long-term operation. Furthermore, since the portion where the movable spring 31 is combined with the protrusion 43 covers the engaging portion 47, when the movable spring 31 is subjected to the reaction force from the static spring 33, even if the movable spring 31 moves slightly relative to the armature 23 and causes the protrusion 43 to deform, the engaging portion 47 can form a fulcrum on the armature 23 when the movable spring 31 moves relative to the armature 23, thereby effectively releasing the force transmitted by the movable spring 31 toward the armature 23.

[0119] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The above embodiments merely illustrate several implementation methods of the present application, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the inventive concept of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A snap-on electromagnetic relay, characterized in that: It includes a base, a coil, a coil lead-out piece, a first static spring and an insulating cover, the insulating cover is located between the base and the coil, the first static spring includes a static spring lead-out piece, a connecting portion and a contact portion provided with a static contact, the connecting portion is connected between the contact portion and the static spring lead-out piece, the coil lead-out piece and the static spring lead-out piece are both passed through the base, the connecting portion is located between the insulating cover and the base, the coil is provided with a wiring terminal, the coil lead-out piece has a wiring portion connected to the wiring terminal, the wiring portion is located on the side of the insulating cover facing away from the connecting portion, the insulating cover has a first baffle wall, the wiring portion is located on the inner side of the first baffle wall, and the contact portion is located on the outer side of the first baffle wall, wherein the outer side of the first baffle wall is the side of the first baffle wall opposite to the coil lead-out piece.

2. The snap-on electromagnetic relay according to claim 1, wherein: It also includes a second static spring passing through the base, wherein the second static spring and the first static spring both include the static spring lead-out piece, the connecting portion, and the contact portion; And / or, the connecting portion is horizontally bent relative to the vertically arranged static spring lead-out piece, and the first static spring and the second static spring are arranged side by side in the snapping direction of the snap-on electromagnetic relay.

3. The snap-on electromagnetic relay according to claim 1 or 2, characterized in that: The base is provided with a first plug hole, the insulating cover has a plug-in portion that matches the first plug hole, the coil lead-out piece is passed through the plug-in portion and extends out of the base through the first plug hole, and a first glue dispensing groove surrounding the coil lead-out piece is formed on the side of the base facing away from the insulating cover, the first glue dispensing groove is provided with a glue injection part, the glue injection part is sealed around the coil lead-out piece, the glue injection part fills the gap between the coil lead-out piece and the side wall of the first plug hole, and the glue injection part is sealed against the plug-in portion.

4. The snap-on electromagnetic relay according to claim 3, characterized in that: The coil includes a bracket and an enameled wire, the bracket includes a sleeve and a support flange, the enameled wire is wound around the bracket, and the bracket and the coil lead-out piece are injection-molded as one piece, so that the end of the coil lead-out piece is buried in the support flange, and the wiring portion is exposed on the inner side of the support flange, and the first retaining wall is against the outer wall of the support flange.

5. The snap-on electromagnetic relay according to claim 4, characterized in that: A first slot and a through hole penetrating the bottom wall of the first slot are formed in the plug-in portion. The support flange is inserted into the first slot, and the coil lead-out piece extends out of the plug-in portion through the through hole.

6. The snap-on electromagnetic relay according to claim 4, characterized in that: The insulating cover has a second barrier wall adjacent to the first barrier wall, and the supporting flange and the wiring portion are both located in a space enclosed by the first barrier wall and the second barrier wall.

7. The snap-on electromagnetic relay according to claim 1, wherein: The snap-type electromagnetic relay also includes a yoke, an armature and a movable spring. The yoke is L-shaped, one end of the yoke is connected to the base, and the other end cooperates with the armature. The coil is arranged in the space enclosed by the armature and the yoke. The movable spring is connected to the armature and can snap-fit ​​with the contact part or disconnect the contact under the drive of the armature. The base is provided with a first socket and a second socket, wherein the first socket is located below the position where the armature and the yoke cooperate, and the second socket is located near the connection position between the yoke and the base, the coil lead-out piece extends out of the base through the first socket, and the static spring lead-out piece extends out of the base through the second socket.

8. The snap-on electromagnetic relay according to claim 7, characterized in that: The base is provided with a fixing portion, and an end of the yoke away from the armature is inserted into the fixing portion; the insulating cover further has a third retaining wall, the fixing portion is located on the outside of the third retaining wall, the coil is located on the inside of the third retaining wall, and a portion of the surface of the third retaining wall is located on the path of creepage from the static spring lead piece to the coil; And / or, the shortest distance from the first socket to the yoke is greater than the shortest distance from the second socket to the yoke, the connecting portion is horizontally bent relative to the vertically arranged static spring lead-out piece, the connecting portion is in contact with the base and extends toward the side where the dynamic spring is located, so that the contact portion corresponds to the dynamic spring.

9. The snap-on electromagnetic relay according to claim 7, characterized in that: It also includes a second static spring that passes through the base, the second static spring is in the shape of a straight sheet, and is passed through the base, the contact portion of the second static spring is located on the outside of the first baffle wall, and the contact portion of the first static spring and the contact portion of the second static spring are arranged side by side in the closing direction of the closing electromagnetic relay.

10. The snap-on electromagnetic relay according to claim 9, characterized in that: The dynamic spring includes a bridge-type dynamic spring piece and two dynamic contacts connected to both ends of the bridge-type dynamic spring piece. When the dynamic spring is driven by the armature to clap with the first static spring and the second static spring, one of the dynamic contacts contacts the static contact of the first static spring, and the other dynamic contact contacts the static contact of the second static spring, so that the first static spring is connected in series with the second static spring through the bridge-type dynamic spring piece.

11. The snap-on electromagnetic relay according to claim 2 or 9, characterized in that: At least one of the base and the insulating cover is provided with a retaining wall, wherein the retaining wall is located between the contact portion of the first static spring and the contact portion of the second static spring; And / or, one of the insulating cover and the base is provided with a partition, and the other one is provided with a partition groove, the partition cooperates with the partition groove, the first static spring is located on one side of the partition, and the second static spring is located on the other side of the partition.

12. The snap-on electromagnetic relay according to claim 1, wherein: A second glue dispensing groove surrounding the static spring lead-out piece is formed on a side of the base facing away from the insulating cover; And / or, the snap-on electromagnetic relay also includes a shell, which is covered on the base, and a notch is formed at the corresponding edge position of the base, and part of the side wall of the shell extends from the edge of the base to enclose the notch to form a third glue dispensing groove.

13. The snap-on electromagnetic relay according to claim 1, wherein: At least part of the structure of the connecting portion is a temperature-modulating structure; Wherein, the temperature conduction path of the temperature-mitigating structure is greater than the straight-line distance from the contact portion to the static spring lead-out piece; and / or, the thermal conductivity of at least a portion of the temperature mitigation structure is less than the thermal conductivity of the contact portion; And / or, at least one cross-sectional area of ​​the temperature mitigation structure is smaller than any cross-sectional area of ​​the static spring lead-out piece.

14. The snap-on electromagnetic relay according to claim 13, wherein: Including at least one of the following technical solutions: The temperature-modulating structure includes at least two bending portions; Alternatively, the extended shape of the temperature-modulating structure is S-shaped, a wavy line, or a broken line; Alternatively, the temperature-mitigating structure includes a straight extension section and a bent section, and the straight extension section and the bent section are connected; Alternatively, the temperature-modulating structure is made of brass or tin bronze, and the static spring lead-out piece is made of pure copper.

15. The snap-on electromagnetic relay according to claim 14, wherein: The temperature relief structure is located at a position of the connection portion connected to the static spring lead-out piece and / or the contact portion, and a cross-sectional area of ​​the temperature relief structure is smaller than a cross-sectional area of ​​a position of the connection portion other than the temperature relief structure.

16. The snap-on electromagnetic relay according to claim 1 or 13, characterized in that: The static spring lead-out piece and the contact portion are bent toward different sides relative to the connecting portion to form a first bending portion and a second bending portion located at both ends of the connecting portion, and the cross-sectional area of ​​the second bending portion is smaller than the cross-sectional area of ​​the first bending portion.

17. The snap-on electromagnetic relay according to claim 16, wherein: Also includes at least one of the following technical solutions: The width of the first bent portion is smaller than the width of the static spring lead-out piece; Alternatively, the width of the second bent portion is smaller than the width of the contact portion; Alternatively, the cross-sectional area of ​​the connecting portion gradually decreases at a position close to the first bending portion; Alternatively, the cross-sectional area of ​​the contact portion gradually decreases at a position close to the second bending portion.

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