Relay

Abstract

The utility model relates to a relay which comprises a base and at least two static springs, each static spring comprises a static spring leading-out piece, a connecting part and a contact part provided with a static contact, the static spring leading-out pieces are arranged on the base in a penetrating mode, the connecting parts and the contact parts are located on the inner side of the base, the connecting parts are connected between the static spring leading-out pieces and the contact parts, and the static contacts are arranged on the contact parts. And at least part of the structure of the connecting part is a temperature buffering and guiding structure. According to the relay and the static spring, the connecting part is arranged between the static spring leading-out sheet and the static contact, and at least part of the structure of the connecting part is arranged to be the temperature slow-conducting structure, so that the temperature drop speed of the static contact is slowed down, and then the frosting or icing probability of the static contact due to too fast temperature drop is reduced; and the use effect of the relay in a shock cooling environment is improved.

Description

Technical Field

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

[0002] With the development of relay technology, relay products are widely used in household appliances, new energy vehicles, and other products. There are many types of relays, such as DC electromagnetic relays that can connect to high-voltage DC loads, pre-charging relays for new energy vehicles, and PTC heating relays for new energy vehicles.

[0003] In the prior art, when a load device connected to a relay is used in an environment with a sudden drop in temperature (referred to as a "sudden cold environment"), the temperature of the static contact of the relay's stationary spring can drop too quickly, causing frost or ice to form. Frost or ice on the static contact of the stationary spring can lead to poor contact between the static contact of the stationary spring and the movable contact of the movable spring, rendering the relay inoperable. Utility Model Content

[0004] Based on this, a relay is provided to solve the problem of how to reduce the probability of frost or ice formation on the static contacts in a sudden cooling environment so as to improve the use effect of the relay in the sudden cooling environment.

[0005] The present application provides a relay, which includes a base and at least two static springs, each of the static springs including a static spring lead-out piece, a connecting portion, and a contact portion provided with a static contact. The static spring lead-out piece is passed through the base, and the connecting portion and the contact portion are both located on the inner side of the base. The connecting portion is connected between the static spring lead-out piece and the contact portion, and at least part of the structure of the connecting portion is a temperature-modulating structure.

[0006] In one embodiment, 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;

[0007] 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;

[0008] 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.

[0009] In one embodiment, at least one of the following technical solutions is included:

[0010] The temperature-modulating structure includes at least two bending portions;

[0011] Alternatively, the extended shape of the temperature-modulating structure is S-shaped, a wavy line, or a broken line;

[0012] 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;

[0013] Alternatively, the temperature-modulating structure is made of brass or tin bronze, and the static spring lead-out piece is made of pure copper.

[0014] 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.

[0015] 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 bent portion and a second bent portion located at both ends of the connecting portion, and the cross-sectional area of ​​the second bent portion is smaller than the cross-sectional area of ​​the first bent portion.

[0016] In one embodiment, the width of the first bent portion is smaller than the width of the static spring lead-out piece, and / or the width of the second bent portion is smaller than the width of the contact portion.

[0017] In one embodiment, the cross-sectional area of ​​the connecting portion at a position close to the first bending portion gradually decreases, and / or the cross-sectional area of ​​the contact portion at a position close to the second bending portion gradually decreases.

[0018] In one embodiment, the static spring lead-out piece arranged vertically relative to the connecting portion is bent horizontally to be in contact with the base.

[0019] In one embodiment, the number of the static springs is two, and the relay includes a dynamic spring, which includes a bridge-type dynamic spring piece and two dynamic contacts connected to both ends of the bridge-type dynamic spring piece. The dynamic spring can snap together to make the two dynamic contacts contact or disconnect with the static contacts of the two static springs respectively. When the two dynamic contacts are in contact with the static contacts of the two static springs respectively, the bridge-type dynamic spring piece connects the two static springs in series.

[0020] In one embodiment, the relay includes a coil and two coil lead-out plates, the coil includes a bracket and an enameled wire, the bracket includes a sleeve and two supporting flanges, the enameled wire is wound around the sleeve, and its two ends are respectively connected to the two coil lead-out plates, one end of the two coil lead-out plates is respectively injection-molded with the two supporting flanges, and the other ends pass through the base.

[0021] In one embodiment, it includes a yoke and an armature, 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 the armature is used to drive the movable spring to contact or disconnect with the static contacts of the two static springs in a snapping manner.

[0022] In one embodiment, the base is provided with two first sockets and two second sockets, the two coil lead-out pieces are respectively correspondingly inserted into the two first sockets, the two static springs are arranged side by side in a direction perpendicular to the flapping direction of the dynamic spring, and the static spring lead-out pieces of the two static springs are respectively correspondingly inserted into the two second sockets.

[0023] In one embodiment, the shortest distance from the first socket to the yoke is greater than the shortest distance from the second socket to the yoke.

[0024] In one embodiment, the relay further includes an insulating cover, which is used for electrical isolation between the two static springs and between the static spring and the coil lead-out piece.

[0025] In one embodiment, the insulating cover covers the connecting portion, and the insulating cover is formed with a plug-in portion and a first retaining wall, the coil lead-out piece is inserted into the plug-in portion, the first retaining wall is clamped between the coil lead-out piece and the static contact, and the plug-in portion cooperates with the first socket.

[0026] In one embodiment, a glue dispensing groove surrounding the coil lead-out piece is formed on the side of the base facing away from the insulating cover, and the glue dispensing groove is provided with a glue injection part, and 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 and abutted against the plug-in part.

[0027] 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 portions of the two static springs;

[0028] 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, and the partition plate cooperates with the partition groove and is located between the connecting parts of the two static springs.

[0029] In one embodiment, the relay includes an insulating component, the movable spring and the armature are integrally injection-molded through the insulating component, one end of the movable spring is embedded in the insulating component, and the other end extends from the insulating component toward the side where the base is located; the insulating component includes a main body and an extension portion formed in one piece, the main body is connected to the armature, and the extension portion extends from the main body toward the side where the base is located, and in the flapping direction of the movable spring, the extension portion is located between the movable spring and the armature, and the extension portion is spaced apart relative to at least one of the movable spring and the armature.

[0030] In one embodiment, at least part of the structure of the extension portion is covered on a side of the armature facing the movable spring, one end of the movable spring is buried in the main body, and a portion of the movable spring exposed from the main body is spaced apart from the extension portion.

[0031] In one embodiment, the insulating component includes a covering portion covering the bottom end of the armature, and the covering portion is protruded on a side of the extending portion facing away from the movable spring.

[0032] In one embodiment, a slope is formed on the bottom end of the armature, and the gap between the portion of the extension covering the slope and the movable spring gradually increases in a direction approaching the base.

[0033] In one embodiment, at least a portion of the extension portion covers a side of the movable spring facing the armature, the extension portion is spaced relative to the armature, and a bottom end of the extension portion extends beyond a bottom end of the armature;

[0034] Alternatively, part of the structure of the main body protrudes from the side of the extension portion facing away from the armature to form a protrusion, one end of the movable spring is embedded in the protrusion, and the movable spring and the armature are both spaced apart from the extension portion.

[0035] In one embodiment, a first through-hole is provided in the middle of the armature, and the insulating component includes an embedding portion connected to the main body, and the embedding portion cooperates with the first through-hole; a second through-hole is provided at the end of the movable spring, and part of the structure of the insulating component is embedded in the second through-hole.

[0036] In one embodiment, in the flapping direction of the movable spring, a portion of the movable spring embedded in the insulating component and the embedded portion overlap with each other.

[0037] In the above-mentioned relay, the static spring adopts a connection portion provided between the static spring lead-out piece and the static contact, and at least part of the structure of the connection portion is provided as a temperature-slowing structure, thereby slowing down the temperature drop rate of the static contact, and then reducing the probability of frost or ice on the static contact due to excessive temperature drop, so as to ensure that the static contact can maintain good electrical contact with the moving spring of the relay, so that the relay can still work normally in a sudden cold environment, thereby improving the use effect of the relay in a sudden cold environment. 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 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 relay from another perspective is shown.

[0041] Figure 3 This is a side structural schematic diagram of a relay according to one embodiment of the present application.

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

[0043] Figure 5 This is a structural diagram of a relay according to one embodiment of the present application, in which a movable spring and an armature are integrally formed through an insulating component.

[0044] Figure 6 for Figure 5 The diagram shows a front structural diagram of a relay in which a movable spring and an armature are integrally formed through an insulating component.

[0045] Figure 7 A relay along the Figure 6 The cross-sectional structure diagram of line II-II in FIG. Figure 7 (a), (b) and (c) in the drawing respectively show the structures of the insulating component according to different embodiments.

[0046] Figure 8 This is a schematic diagram of the assembly structure of the static spring and the base in a relay according to one embodiment of the present application.

[0047] Figure 9This is a schematic diagram of the three-dimensional structure of a relay according to another embodiment of the present application.

[0048] Figure 10 for Figure 9 A schematic diagram of the three-dimensional structure of a relay from another perspective is shown.

[0049] Figure 11 for Figure 9 The side view schematic diagram of the relay is shown.

[0050] Figure 12 for Figure 11 The cross-sectional structure diagram of the relay along line III-III is shown.

[0051] Figure 13 for Figure 9 Schematic diagram of the exploded structure of the relay is shown.

[0052] Figure 14 for Figure 13 The diagram shows a top view of the assembled insulating cover of a relay and a base equipped with a static spring.

[0053] Figure 15 for Figure 14 A schematic cross-sectional view of part of the relay structure along line IV-IV is shown.

[0054] Figure 16 Schematic diagram of the cross-sectional structure of a relay in an assembled state according to one embodiment of the present application.

[0055] Figure 17 for Figure 16 The diagram shows a cross-sectional view of the relay when the first and second glue dispensing grooves are filled with glue.

[0056] Figure 18 This is a schematic cross-sectional structural diagram of a relay according to another embodiment of the present application.

[0057] Description of reference numerals:

[0058] 10. Base; 11. First jack; 13. Second jack; 15. First glue dispensing slot; 151. Glue injection member; 17. Second glue dispensing slot; 19. Third glue dispensing slot; 101. Retaining wall; 103. Partition; 105. Fixing portion; 105a. Second slot; 20. Magnetic circuit portion; 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. Terminal; 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, main body; 413, protrusion; 43, extension; 45, covering 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, outer shell. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions are for illustrative purposes only and do not represent the only implementations.

[0062] 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.

[0063] 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.

[0064] See Figure 1 and Figure 2 As shown, a relay provided in one embodiment of the present application includes a base 10, a magnetic circuit portion 20, and a contact portion 30. The base 10 provides a mounting carrier 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.

[0065] Combine Figures 1 to 5 As 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 contact or disconnect with the static spring 33.

[0066] 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 relay, when current flows through the coil 21, it generates 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 to snap into contact with the static spring 33. An elastic member 27 is disposed between the yoke 25 and the armature 23. 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.

[0067] Combine Figure 1 and Figure 4 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".

[0068] The inventors discovered that in the related art, when a load device connected to a relay is used in a sudden cold environment, the ambient temperature suddenly drops, and the static contact is prone to frost or ice due to a rapid drop in temperature, which in turn leads to poor contact between the static contact and the moving contact 31a of the moving spring 31, affecting the normal use of the relay.

[0069] In this regard, the inventors have proposed a solution that can improve the frost or ice phenomenon on the static contacts. Figure 2 and Figure 8As shown, in addition to the contact portion 33a provided with the static contact, the static spring 33 also includes a static spring lead-out piece 33b and a connecting portion 33c connected between the contact portion 33a and the static spring lead-out piece 33b. The static spring lead-out piece 33b is provided through the base 10 so as to extend from the base 10. The contact portion 33a and the connecting portion 33c are both located on the inner side of the base 10. The inner side of the base 10 refers to the side of the base 10 facing inward; correspondingly, the outer side of the base 10 refers to the side of the base 10 facing away from the interior. It can be understood that since the static spring lead-out piece 33b is provided through the base 10, part of the structure of the static spring lead-out piece 33b is located on the inner side of the base 10, and part of the structure is located on the outer side of the base 10. Because the contact portion 33a and the connecting portion 33c are both located inside the base 10, the static spring lead piece 33b is connected to the connecting portion 33c inside the base 10. In other words, the end of the static spring lead piece 33b away from the connecting portion 33c extends out of the base 10. The contact portion 33a is used to make or break contact with the dynamic spring 31.

[0070] In the embodiment of the present application, at least a portion of the structure of the connection portion 33c is a temperature-reducing structure. In this embodiment, since at least a portion of the structure of the connection portion 33c is configured as a temperature-reducing structure, the temperature-reducing structure is utilized to slow the rate of temperature drop of the contact portion 33a in a sudden cold environment, thereby reducing the chance of frosting 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 can maintain 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.

[0071] The temperature-mitigating structure's heat conduction path is greater than the linear distance from the contact portion 33c to the static spring lead-out piece 33b. This lengthens the heat conduction path between the contact portion 33c and the static spring lead-out piece 33b, thereby slowing heat loss from the contact portion 33a and, in turn, reducing the likelihood of frost or ice forming on the contact portion 33a due to a rapid temperature drop. In some embodiments, at least a portion of the temperature-mitigating structure has a lower thermal conductivity than the contact portion 33a. This lower thermal conductivity allows the temperature-mitigating structure to slow heat loss from the contact portion 33a, thereby reducing the likelihood of frost or ice forming on the static contact point on the contact portion 33a due to a rapid temperature drop.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] Continue to combine Figure 8 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.

[0080] Furthermore, the cross-sectional area of ​​the second bend 333 is smaller than that of the first bend 331. It is understood that 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 the thermal conductivity of a material, i.e., a measure of its thermal conductivity. Since the first bend 331 and the second bend 333 are made of the same material, i.e., 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 333 is set to be smaller than that of the first bend 331. This helps slow the flow of heat to the contact portion 33a located near the second bend 333, thereby reducing the temperature change rate of the contact portion 33a and reducing the chance of frost or ice forming on the static contacts of the contact portion 33a.

[0081] 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, and then reduce the heat loss rate of the contact portion 33a, thereby reducing the probability of frost or ice on the contact portion 33a.

[0082] The width of the second bent portion 333 is smaller than the width 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, thereby reducing the probability of frost or ice forming on the static contact on the contact portion 33a.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] Combine Figure 8As shown, in some embodiments, the connecting portion 33c is horizontally bent relative to the vertically disposed static spring lead-out piece 33b. This allows the static spring lead-out piece 33b to abut against the base 10 and extend toward the side of the movable spring 31 when the static spring lead-out piece 33b extends downward from the base 10. This allows the contact portion 33a to correspond with the movable spring 31, ensuring that the movable spring 31 can contact or disconnect the contact portion 33a when the movable spring 31 snaps in. It should be noted that because the connecting portion 33c abuts against the base 10 and extends, while the static spring lead-out piece 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-out piece 33b. This allows the contact portion 33a to transfer heat to the static spring lead-out piece 33b through the connecting portion 33c in a sudden cooling environment, when the load device experiences a low temperature. Compared with the related art that adopts a straight-sheet static spring in which the static contact is directly located at one end of the static spring lead-out piece, the static spring 33 of the present application can use the connection part 33c to extend the heat conduction path and can also slow down the speed of heat loss from the contact part 33a, thereby reducing the probability of frost or ice on the static contact on the contact part 33a due to rapid temperature drop.

[0087] In some embodiments, the relay adopts a bridge structure, that is, the dynamic spring 31 realizes the series connection between the two static springs 33. Figure 2 and Figure 8 As shown, the movable spring 31 includes two movable contacts 31a. The movable spring 31 comprises a bridge-type movable spring blade, with the two movable contacts 31a connected to each end of the bridge-type movable spring blade. Two static springs 33 are mounted on the base 10, with the contact portions 33a of the two static springs 33 corresponding 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. The bridge-type movable spring blade connects the two static springs 33 in series. This bridge-type structure allows for direct voltage division of the load voltage, reducing the voltage between each set of movable contacts 31a and the contact portion 33a. 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 contact portion 33a. 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 relay of this embodiment increases the contact gap, thereby improving the arc breaking ability, so as to improve its performance in high voltage applications.

[0088] Combine Figure 1 、 Figure 2 and Figure 8As shown, the 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 wiring portion 29a, and the coil 21 leads to a terminal 21b, and the terminal 21b is connected to the wiring portion 29a, thereby achieving the connection between the coil 21 and the coil lead-out piece 29. The end of the coil lead-out piece 29 where the wiring portion 29a is provided can be embedded in the bracket 21a, and the wiring portion 29a is exposed from the inner side of the bracket 21a to connect to the terminal 21b of the coil 21. In this embodiment, the end of the coil lead-out piece 29 with the terminal 21b is buried in the bracket 21a. On the one hand, the fixation of the coil lead-out piece 29 and the bracket 21a is achieved, so that the coil lead-out piece 29 and the coil 21 can be assembled to the base 10 together with the bracket 21a as a whole, thereby improving the assembly convenience, and the bracket 21a can enhance the stability of the coil lead-out piece 29; on the other hand, the covering of the coil lead-out piece 29 by the bracket 21a can increase the creepage distance between the coil lead-out piece 29 and peripheral components such as the armature 23 or the movable spring 31.

[0089] 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 mate, and the second socket 13 is located near the connection point between the yoke 25 and the base 10. In this structure where the movable spring 31 contacts the static spring 33 by snapping, the miniaturized structure design of the relay, which meets the corresponding functional design requirements, allows for compact fit between components without wasting space. Because the second socket 13 is located near the connection point 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.

[0090] In order to facilitate further understanding of the technical solution of the relay of the present application, a relay in the conventional technology is described here as a comparative example.

[0091] In conventional technology, the coil lead-out piece 29 connected to the coil 21 is inserted into the second jack 13, while the static spring lead-out piece 33b is inserted into the first jack 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 provide 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 providing an insulating structure will result in a lack of compactness between the components, which is not conducive to the miniaturization of the relay.

[0092] In this regard, in the relay of the present application, because the connecting portion 33c is in contact with the base 10 and extends toward the side where the movable spring 31 is located, the contact portions 33a and the static spring lead piece 33b at both ends of the connecting portion 33c are adapted to assembly requirements. Specifically, the static spring lead piece 33b extends out of the base 10 through the second insertion hole 13, and the connecting portion 33c extends toward the side where the movable spring 31 is located. This allows the contact portion 33a to correspond with the movable spring 31, thereby accommodating the contact portion 33a when the movable spring 31 engages with the armature 23.

[0093] In this embodiment, the coil lead-out piece 29 extends out of the base 10 through the first insertion hole 11. Since the first insertion hole 11 is closer to the movable spring 31 than the second insertion hole 13, the distance from the coil lead-out piece 29 to the movable spring 31 is smaller than the distance from the static spring lead-out piece 33b to the movable spring 31. Compared with traditional technology, the relay of the present application passes the coil lead-out piece 29 through the first socket 11, so that the coil lead-out piece 29 is away from the position where the yoke 25 is connected to the base 10. At the same time, the creepage distance and / or electrical gap between the movable spring 31 and the armature 23 is used to increase the creepage distance and / or electrical gap between the movable spring 31 and the coil lead-out piece 29. Therefore, the purpose of increasing the creepage distance and / or electrical gap between the coil lead-out piece 29 and the movable spring 31 can be achieved without changing the design size of the base 10 and the structural settings of the yoke 25, the armature 23 and the movable spring 31. Therefore, the structural setting of the present application can take into account the miniaturization of the relay while increasing the creepage distance and / or electrical gap, which is conducive to expanding the application of relays in higher voltage fields.

[0094] There are two static springs 33 and two coil lead-out pieces 29. The base 10 is provided with two second holes 13 and two first holes 11. The two static springs 33 are arranged side by side in a direction perpendicular to the flapping direction of the armature 23, and the static spring lead-out pieces 33b of the two static springs 33 are respectively correspondingly inserted into the two second holes 13, and the two coil lead-out pieces 29 are respectively correspondingly inserted into the two first holes 11.

[0095] Combine Figure 9 and Figure 10 As shown, in some embodiments, the relay further includes an insulating cover 50 , which is used for electrical isolation between the two static springs 33 and between the static spring 33 and the coil lead-out piece 29 .

[0096] Combine Figures 11 to 13As shown, the insulating cover 50 covers the connecting portion 33c, thereby isolating the static spring 33 from the coil 21 located above the insulating cover 50. The insulating cover 50 is formed with a plug-in portion 51 and a first retaining wall 53. The first retaining wall 53 is sandwiched between the coil lead-out piece 29 and the contact portion 33a. The first retaining wall 53 is used to electrically isolate the coil lead-out piece 29 and the contact portion 33a, thereby increasing the creepage distance and electrical clearance between the coil lead-out piece 29 and the contact portion 33a.

[0097] Combine Figures 14 to 16 As shown, the coil lead-out piece 29 is inserted into the plug-in portion 51. It can be understood that when the end of the coil lead-out piece 29 is embedded in the bracket 21a, the structural portion of the bracket 21a that covers the end of the coil lead-out piece 29 is inserted into the plug-in portion 51 together with the coil lead-out piece 29. The plug-in portion 51 is matched with the first jack 11.

[0098] 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 17 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, thereby increasing the creepage distance between the coil lead-out piece 29 and the static spring 33.

[0099] Combine Figure 13 As shown, 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, so 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.

[0100] In some embodiments, the bracket 21a includes two supporting flanges 21a1, the enameled wire 211 is wound around the sleeve, and the two ends are respectively connected to the two coil lead-out plates 29, one end of the two coil lead-out plates 29 is respectively injection-molded with the two supporting flanges 21a1, and the other ends pass through the base 10.

[0101] Further, combined with Figure 15 and Figure 16 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.

[0102] 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.

[0103] Combine Figure 16 and Figure 17 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.

[0104] Combine Figure 18 As shown, the relay also includes a housing 60, which is mounted on the base 10. The housing 60 provides dust and water 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. The portion of the housing 60 extending from the edge of the base 10 encloses the notch to form another glue groove (hereinafter referred to as the "third glue groove 19"). In this way, the housing 60 can be connected to the base 10 by filling the third glue groove 19 with glue.

[0105] 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.

[0106] 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.

[0107] Recombination Figure 12 and Figure 13 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.

[0108] In an embodiment where the insulating cover 50 is provided with a retaining wall 101 , the retaining wall 101 may be integrally formed with the insulating cover 50 , so that when the insulating cover 50 is mated with the base 10 , the retaining wall 101 is located between the contact portions 33 a of the two static springs 33 .

[0109] One of the insulating cover 50 and the base 10 is provided with a partition 55, and the other one is provided with a partition groove 103. The partition 55 cooperates with the partition groove 103 and is located between the connecting parts 33c of the two static springs 33, so that high-voltage isolation between the connecting parts 33c of the two static springs 33 is achieved by utilizing the cooperation between the partition 55 and the partition groove 103.

[0110] Combine Figure 11 and Figure 13 As shown, in some embodiments, the base 10 is also 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, by utilizing 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.

[0111] 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.

[0112] In the relay of the embodiment of the present application, Figures 5 to 7As shown, the relay includes an insulating component 40, through which the movable spring 31 and the armature 23 are integrally injection-molded. This reduces the number of assembly steps between the movable spring 31 and the armature 23 and improves production efficiency. One end of the movable spring 31 is embedded in the insulating component 40, and the other end extends from the insulating component 40 toward the side where the base 10 is located.

[0113] The insulating component 40 includes an integrally formed main portion 41 and an extension portion 43. The main portion 41 is connected to the armature 23. The extension portion 43 extends from the main portion 41 toward the side of the base 10. In the flapping direction of the movable spring 31, the extension portion 43 is located between the movable spring 31 and the armature 23, and the extension portion 43 is spaced relative to at least one of the movable spring 31 and the armature 23. This maintains the spacing between the movable spring 31 and the armature 23, while also allowing for a compact design. The gap between the extension portion 43 and the movable spring 31 and / or the armature 23 increases the creepage distance between the movable spring 31 and the armature 23 on the surface of the extension portion 43. This allows the creepage distance and / or electrical clearance between the movable spring 31 (high-current component) in the contact portion 30, through the armature 23 (conductor) and yoke 25 (conductor) to the coil 21 (low-current component), to more easily achieve electrical isolation between high-current and low-current components, thereby facilitating the use of the relay in high-voltage environments.

[0114] Combine Figure 7 As shown in Figure (a), in some embodiments, at least a portion of the extension 43 covers the side of the armature 23 facing the movable spring 31. One end of the movable spring 31 is embedded in the main body 41, and the portion of the movable spring 31 exposed from the main body 41 is spaced apart from the extension 43. In this embodiment, the creepage path of the side of the movable spring 31 facing the armature 23 toward the armature 23 passes through the surface of the extension 43. Therefore, the spacing between the extension 43 and the main body 41 can utilize the surface of the extension 43 to increase the creepage distance and / or electrical clearance between the movable spring 31 and the armature 23.

[0115] Furthermore, the insulating component 40 includes a covering portion 45 that covers the bottom end 23a of the armature 23 (i.e., the end away from the yoke 25). The covering portion 45 is provided protrudingly on the side of the extension portion 43 facing away from the dynamic spring 31. In this embodiment, the covering portion 45 covering the bottom end 23a of the armature 23 can increase the creepage distance and / or electrical clearance between the dynamic spring 31 and the armature 23.

[0116] The bottom end 23a of the armature 23 is formed with a sloped surface 23b. As it approaches the base 10, the gap between the portion of the extension 43 that overlaps the sloped surface 23b and the movable spring 31 gradually increases. This structural arrangement allows the extension 43 to extend at an angle away from the movable spring 31. This allows the extension 43 to extend longer while maintaining its vertical height. Consequently, this structural arrangement utilizes the sloped surface 23b to increase the creepage distance between the movable spring 31 and the armature 23 on the surface of the extension 43 while maintaining a compact overall connection between the movable spring 31 and the armature 23.

[0117] It should be noted that the insulating component 40 is not limited to the extension portion 43 covering the side of the armature 23 facing the dynamic spring 31 , and the gap between the extension portion 43 and the dynamic spring 31 is used to increase the creepage distance and / or electrical gap.

[0118] For example, combined with Figure 7 As shown in FIG. (b), in another embodiment, at least part of the extension portion 43 is covered on the side of the movable spring 31 facing the armature 23, the extension portion 43 is spaced relative to the armature 23, and the bottom end 23a of the extension portion extends beyond the bottom end 23a of the armature 23. For another example, in combination with Figure 7 As shown in Figure (c), part of the structure of the main body 41 protrudes from the side of the extension 43 facing away from the armature 23 to form a protrusion 413. One end of the movable spring 31 is buried in the protrusion 413. The movable spring 31 and the armature 23 are both spaced apart from the extension 43.

[0119] In the above embodiment, the extension portion 43 is spaced apart from the movable spring 31 and / or the armature 23 to form a gap, so that at least a portion of the surface of the extension portion 43 is located on the creepage path between the movable spring 31 and the armature 23, thereby utilizing the surface of the extension portion 43 to increase the creepage distance and / or electrical gap between the movable spring 31 and the armature 23.

[0120] For ease of understanding, the following Figure 7 Taking the insulating component 40 shown in FIG. 1 ( a ) as an example in which the movable spring 31 and the armature 23 are integrally injection-molded, the structure of the relay is further described.

[0121] Combine Figure 7 As shown in FIG. (a), the insulating component 40 is formed with a first creepage path R1 and a second creepage path R2. Figure 7Figure (a) shows the first creepage path R1 with dotted arrows, and the second creepage path R2 with solid arrows. 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 insulating component 40, 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 a portion of the surface of the insulating component 40, to the side of the armature 23 facing away from the movable spring 31. The lengths of the first creepage path R1 and the second creepage path R2 are both 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, ensuring that the creepage distance (i.e., the length of the shortest creepage path) and the electrical clearance between the movable spring 31 and the armature 23 meet the creepage safety requirements for higher voltage ranges (e.g., 1000 V).

[0122] There is no limitation on the dimensions of the main body 41 and the extension 43 of the insulating component 40. As long as the dimensions of the insulating component 40 meet the corresponding creepage requirements, the insulating component 40 in the 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.

[0123] Continue to combine Figure 7 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 connected to the main body 41. 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 fit stability between the main body 41 and the armature 23, thereby reducing the chance of the main body 41 falling off the armature 23.

[0124] A second through hole 31 b is provided at the end of the movable spring 31 . Since the end of the movable spring 31 is embedded in the insulating component 40 , a portion of the insulating component 40 is embedded in the second through hole 31 b to increase the connection stability between the movable spring 31 and the insulating component 40 .

[0125] In the closing direction of the movable spring 31, the portion of the movable spring 31 embedded in the insulating component 40 overlaps with the interlocking portion 47. In other words, the portion of the movable spring 31 that is bonded to the insulating component 40 covers the interlocking portion 47. In this embodiment, the insulating component 40 can provide a buffering effect between the movable spring 31 and the armature 23. For example, when the armature 23 drives the movable spring 31 into contact with the static spring 33, the static spring 33 generates a reaction force on the movable spring 31. The portion of the movable spring 31 that is bonded to the insulating component 40 can buffer the force exerted on the movable spring 31. At the same time, the interlocking portion 47 can buffer the transfer of this force to the armature 23. Consequently, the insulating component 40 as a whole provides a buffering effect between the movable spring 31 and the armature 23, ensuring a stable connection between the movable spring 31 and the armature 23 during long-term operation.

[0126] 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.

[0127] 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 relay, characterized in that: The relay includes a base and at least two static springs, each of the static springs includes a static spring lead-out piece, a connecting portion, and a contact portion provided with a static contact. The static spring lead-out piece is passed through the base, and the connecting portion and the contact portion are both located on the inner side of the base. The connecting portion is connected between the static spring lead-out piece and the contact portion, and at least part of the structure of the connecting portion is a temperature-modulating structure.

2. The relay according to claim 1, 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.

3. The relay according to claim 2, characterized in that 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.

4. The relay according to claim 2, characterized in that 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.

5. The relay according to claim 1, wherein: 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.

6. The relay according to claim 5, characterized in that The width of the first bent portion is smaller than the width of the static spring lead-out piece, and / or the width of the second bent portion is smaller than the width of the contact portion.

7. The relay according to claim 5 or 6, characterized in that: The cross-sectional area of ​​the connecting portion at a position close to the first bending portion gradually decreases, and / or the cross-sectional area of ​​the contact portion at a position close to the second bending portion gradually decreases.

8. The relay according to claim 1 or 5, characterized in that: The connecting portion is horizontally bent relative to the vertically arranged static spring lead-out piece so as to be in contact with the base.

9. The relay according to claim 8, characterized in that The number of the static springs is two, and the relay includes a dynamic spring, which includes a bridge-type dynamic spring piece and two dynamic contacts connected to both ends of the bridge-type dynamic spring piece. The dynamic spring can snap together to make the two dynamic contacts contact or disconnect with the static contacts of the two static springs respectively. When the two dynamic contacts are in contact with the static contacts of the two static springs respectively, the bridge-type dynamic spring piece connects the two static springs in series.

10. The relay according to claim 9, characterized in that The relay includes a coil and two coil lead-out plates. The coil includes a bracket and an enameled wire. The bracket includes a sleeve and two supporting flanges. The enameled wire is wound around the sleeve, and its two ends are respectively connected to the two coil lead-out plates. One end of the two coil lead-out plates is respectively injection-molded integrally with the two supporting flanges, and the other ends pass through the base.

11. The relay according to claim 10, characterized in that It includes a yoke and an armature, 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 the armature is used to drive the movable spring to contact or disconnect with the static contacts of the two static springs in a snapping manner.

12. The relay according to claim 11, wherein: The base is provided with two first sockets and two second sockets, the two coil lead-out pieces are respectively correspondingly inserted into the two first sockets, the two static springs are arranged side by side in a direction perpendicular to the flapping direction of the dynamic spring, and the static spring lead-out pieces of the two static springs are respectively correspondingly inserted into the two second sockets.

13. The relay according to claim 12, wherein: The shortest distance from the first insertion hole to the yoke is greater than the shortest distance from the second insertion hole to the yoke.

14. The relay according to claim 12, wherein: The relay further includes an insulating cover, which is used for electrical isolation between the two static springs and between the static spring and the coil lead-out piece.

15. The relay according to claim 14, characterized in that The insulating cover covers the connecting portion, and is formed with a plug-in portion and a first retaining wall. The coil lead-out piece is inserted into the plug-in portion. The first retaining wall is clamped between the coil lead-out piece and the static contact. The plug-in portion cooperates with the first jack.

16. The relay according to claim 15, characterized in that A glue dispensing groove surrounding the coil lead-out piece is formed on the side of the base facing away from the insulating cover. The glue dispensing groove is provided with a glue injection part, and 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 jack, and the glue injection part is sealed and abutted against the plug-in part.

17. The relay according to claim 14, wherein: 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 portions of the two static springs; 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, and the partition plate cooperates with the partition groove and is located between the connecting parts of the two static springs.

18. The relay according to claim 11, wherein: The relay includes an insulating component, and the movable spring and the armature are integrally injection-molded through the insulating component. One end of the movable spring is embedded in the insulating component, and the other end extends from the insulating component toward the side where the base is located. The insulating component includes a main body and an extension portion formed in one piece. The main body is connected to the armature, and the extension portion extends from the main body toward the side where the base is located. In the flapping direction of the movable spring, the extension portion is located between the movable spring and the armature, and the extension portion is spaced apart from at least one of the movable spring and the armature.

19. The relay according to claim 18, characterized in that At least a portion of the extension portion is covered on a side of the armature facing the movable spring. One end of the movable spring is embedded in the main body, and a portion of the movable spring exposed from the main body is spaced apart from the extension portion.

20. The relay according to claim 19, wherein The insulating component includes a covering portion covering the bottom end of the armature, and the covering portion is protruded on a side of the extending portion facing away from the movable spring.

21. The relay according to claim 19, wherein The bottom end of the armature is formed with an inclined surface, and in a direction approaching the base, the gap between the portion of the extension portion covering the inclined surface and the movable spring gradually increases.

22. The relay according to claim 18, wherein At least a portion of the extension portion covers a side of the movable spring facing the armature, the extension portion is spaced relative to the armature, and a bottom end of the extension portion extends beyond a bottom end of the armature; Alternatively, part of the structure of the main body protrudes from the side of the extension portion facing away from the armature to form a protrusion, one end of the movable spring is embedded in the protrusion, and the movable spring and the armature are both spaced apart from the extension portion.

23. The relay according to claim 18, wherein A first through-hole is provided in the middle of the armature, and the insulating component includes an embedding portion connected to the main body, and the embedding portion cooperates with the first through-hole; a second through-hole is provided at the end of the movable spring, and part of the structure of the insulating component is embedded in the second through-hole.

24. The relay according to claim 23, characterized in that In the snapping direction of the movable spring, a portion of the movable spring embedded in the insulating member and the fitting portion overlap with each other.

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