A base structure of a relay and an electromagnetic relay

Abstract

This utility model discloses a relay base structure and an electromagnetic relay, including a base. The base has a contact cavity for accommodating the contact portion of the relay and a magnetic circuit cavity for accommodating the magnetic circuit portion of the relay. An insulating partition wall is provided between the contact cavity and the magnetic circuit cavity to separate them. The side wall of the base has a first opening for the contact portion to be laterally inserted into the contact cavity and a second opening for the magnetic circuit portion to be laterally inserted into the magnetic circuit cavity. The first opening and the second opening are located on different sides of the base. The base of this utility model adopts a frame structure, which significantly improves the creepage distance and electrical clearance between the magnetic circuit portion and the contact portion, thereby enhancing the insulation performance of the relay in the new energy field. In particular, the first opening and the second opening are located on different sides of the base, further enhancing the insulation performance between the magnetic circuit portion and the contact portion.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a relay base structure and an electromagnetic relay. Background Technology

[0002] In the fields of new energy such as photovoltaics and wind power, power charging and discharging equipment places far higher demands on the safety and reliability of the core switching device—the relay—than traditional applications. Sufficient creepage distance and electrical clearance must exist between the magnetic circuit and the contact parts of the relay; this is the lifeline for ensuring long-term safe isolation between high and low voltage circuits and preventing insulation breakdown.

[0003] However, most relay products on the market today are designed for ordinary operating conditions, and their internal structures have inherent limitations. This results in insufficient spatial isolation between the magnetic circuit and contact systems, which often share or are adjacent to limited installation space, leading to insufficient insulation spacing between them. This structural defect significantly increases the insulation risk of relays in the new energy field, making it difficult to meet the industry's increasingly stringent standards for power safety. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a relay base structure and an electromagnetic relay, which greatly improves the creepage distance and electrical clearance between the magnetic circuit part and the contact part through structural optimization.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a relay base structure, including a base, the base having a contact cavity for accommodating the contact portion of the relay and a magnetic circuit cavity for accommodating the magnetic circuit portion of the relay, an insulating partition wall being provided between the contact cavity and the magnetic circuit cavity to separate the contact cavity and the magnetic circuit cavity; the side wall of the base having a first opening for laterally inserting the contact portion into the contact cavity and a second opening for laterally inserting the magnetic circuit portion into the magnetic circuit cavity, the first opening and the second opening being located on different sides of the base.

[0006] In a preferred embodiment, the first opening and the second opening are oriented in opposite directions.

[0007] In a preferred embodiment, the orientations of the first opening and the second opening are perpendicular to the distribution directions of the contact cavity and the magnetic circuit cavity, respectively.

[0008] In a preferred embodiment, the inner wall of the magnetic circuit cavity is provided with at least one limiting groove corresponding to the yoke of the magnetic circuit portion, so that the portion of the yoke corresponding to the limiting groove is inserted into the limiting groove in the direction in which the magnetic circuit portion enters the magnetic circuit cavity.

[0009] In a preferred embodiment, the outer side of the base is provided with at least one fixing groove leading to the magnetic circuit cavity, for inserting and engaging with the limiting protrusion of the yoke and fixing it with adhesive; an adhesive groove is formed inside the fixing groove.

[0010] In a preferred embodiment, the yoke is L-shaped or inverted L-shaped, the magnetic circuit cavity is provided with limiting grooves on both sides of the yoke, and the outer side of the base is provided with fixing grooves on both sides of the yoke; each fixing groove passes through the limiting groove on the same side of the yoke.

[0011] In a preferred embodiment, the armature of the magnetic circuit portion engages with the moving spring portion of the contact portion via a push card, and the insulating partition wall is provided with a through groove corresponding to the push card, connecting the magnetic circuit cavity and the contact cavity, so as to make way for and / or guide the push card.

[0012] In a preferred embodiment, the through groove is a notch groove, and the orientation of its groove opening is consistent with the orientation of the second opening; the side wall of the base opposite to the first opening is provided with an avoidance opening corresponding to the push card, which connects the contact cavity and the through groove.

[0013] In a preferred embodiment, the side wall of the base opposite to the first opening is further provided with an auxiliary opening communicating with the contact cavity, for heat dissipation and / or to avoid splashes generated when the contact part is disconnected; the auxiliary opening is located below the avoidance opening and the two are vertically connected, or the base is provided with a reinforcing rib between the auxiliary opening and the avoidance opening, the reinforcing rib separating the auxiliary opening and the avoidance opening.

[0014] In a preferred embodiment, the bottom wall of the base is provided with pin slots corresponding to the lead-out pins of the contact portion, which communicate with the contact cavity. One side of the pin slot is provided with an opening, and the orientation of the opening is the same as that of the first opening. The bottom of the coil frame of the magnetic circuit portion is provided with coil lead-out pins and auxiliary contact portion. The base is provided with clearance openings leading to the magnetic circuit cavity corresponding to the auxiliary contact portion and coil lead-out pins. The clearance openings are at least partially located on the side of the magnetic circuit cavity away from the contact cavity.

[0015] In a preferred embodiment, the insulating partition wall is integrally formed with the base; the thickness of the insulating partition wall is 0.75 to 0.9 mm.

[0016] In a preferred embodiment, the bottom surface or inner top surface of the magnetic circuit cavity is provided with a limiting boss corresponding to the yoke of the magnetic circuit portion.

[0017] This utility model also provides an electromagnetic relay, including a contact portion and a magnetic circuit portion, and also includes a base structure of the relay as described above. The contact portion is inserted into the contact cavity through the first opening, and the magnetic circuit portion is inserted into the magnetic circuit cavity through the second opening.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The base of this utility model is provided with the contact cavity and the magnetic circuit cavity, making the base adopt a frame structure, which significantly improves the creepage distance and electrical clearance between the magnetic circuit part and the contact part, thereby enhancing the insulation performance of the relay in the new energy field. In particular, the first opening and the second opening are located on different sides of the base, further enhancing the insulation performance between the magnetic circuit part and the contact part. In addition, the design of the first opening and the second opening realizes the installation method of lateral insertion of the magnetic circuit part and the contact part. This design simplifies the installation process and makes assembly more convenient and efficient.

[0020] 2. As a preferred embodiment, the first and second openings face opposite directions. This maximizes the insulation performance between the magnetic circuit and the contact parts, preventing misassembly or collisions caused by improper operation during assembly, thereby improving assembly quality and efficiency. It also facilitates subsequent inspection and maintenance of the contact and magnetic circuit parts from different directions. Specifically, the orientation of the first and second openings is perpendicular to the distribution direction of the contact cavity and magnetic circuit cavity, respectively. This design allows for better layout within a limited space, maximizing internal space, reducing overall size, and making the design more compact and efficient.

[0021] 3. As a preferred embodiment, the inner surface of the magnetic circuit cavity is provided with the limiting groove. This design not only ensures the accurate installation of the magnetic circuit part but also enhances its stability within the magnetic circuit cavity, thereby improving the overall reliability and performance of the device. Furthermore, the outer surface of the base is provided with the fixing groove, which further prevents the magnetic circuit part from moving or loosening within the magnetic circuit cavity, ensuring the stability and reliability of the magnetic circuit part. The adhesive fixing further enhances the connection strength between the fixing groove and the limiting protrusion, ensuring that it will not loosen due to vibration or other external forces during long-term use.

[0022] 4. The base side wall is also provided with an auxiliary opening that connects to the contact cavity. This auxiliary opening not only helps with heat dissipation, but also effectively avoids splashes generated when the contact part is disconnected, thereby significantly improving the relay's withstand voltage level.

[0023] 5. As a preferred embodiment, this utility model provides reinforcing ribs between the auxiliary opening and the avoidance opening, which effectively avoids the weakening of the base side wall structure caused by the direct connection between the two, thereby significantly improving the overall strength and rigidity of the base side wall.

[0024] 6. The insulating partition wall and the base are integrally molded with a thickness of 0.75 to 0.9 mm, which ensures a large thickness and further improves the insulation performance and structural stability between the magnetic circuit part and the contact part.

[0025] 7. The bottom or inner top surface of the magnetic circuit cavity is provided with a limiting boss corresponding to the armature of the magnetic circuit section. This boss can limit the armature when the product falls, reduce the fall amplitude of the armature, thereby reducing the deformation of the compression spring in the magnetic circuit section and preventing the compression spring from becoming unrecoverable due to excessive deformation.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the base structure of the relay and the electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the base of a utility model according to an embodiment;

[0028] Figure 2 This is a front view of the base of the utility model according to embodiment;

[0029] Figure 3 This is a rear view of the base of a utility model according to an embodiment;

[0030] Figure 4 This is a three-dimensional structural diagram of an electromagnetic relay of this utility model, as shown in the embodiment. Figure 1 (Excluding the casing);

[0031] Figure 5 This is a three-dimensional structural diagram of an electromagnetic relay of this utility model, as shown in the embodiment. Figure 2 (Excluding the casing);

[0032] Figure 6 yes Figure 4 The main view;

[0033] Figure 7 yes Figure 4 Rear view;

[0034] Figure 8 This is an exploded view of the movable spring part of a utility model according to an embodiment;

[0035] Figure 9 This is a three-dimensional structural schematic diagram of the movable spring part of the present invention as an example;

[0036] Figure 10 This is a three-dimensional structural schematic diagram of the magnetic circuit part of an embodiment of a utility model;

[0037] Figure 11This is a three-dimensional structural diagram of the base of this utility model in Embodiment 2. Figure 1 ;

[0038] Figure 12 yes Figure 11 The main view;

[0039] Figure 13 This is a three-dimensional structural diagram of the base of this utility model in Embodiment 2. Figure 2 ;

[0040] Figure 14 yes Figure 13 The main view;

[0041] Figure 15 This is a three-dimensional structural diagram of the electromagnetic relay of this utility model, as shown in Embodiment 2. Figure 1 (Excluding the casing);

[0042] Figure 16 yes Figure 15 The main view;

[0043] Figure 17 This is a three-dimensional structural diagram of the electromagnetic relay of this utility model, as shown in Embodiment 2. Figure 2 (Excluding the casing)

[0044] In the diagram, 1. Magnetic circuit section; 11. Armature; 111. First side; 112. Second side; 113. Second limiting protrusion; 114. Drive section; 12. Yoke; 121. Limiting protrusion; 13. Coil frame; 14. Coil; 15. Iron core; 16. Limiting spring; 17. Coil lead-out foot; 2. Moving spring section; 21. Rigid moving spring; 211. First lug; 22. Moving spring lead-out piece; 221. Second lug; 222. Lead-out foot; 23. Moving contact; 24. Contact spring; 25. Flexible connector; 26. Shaft; 3. Stationary spring section; 31. Stationary spring; 32. Stationary contact; 4. Pushing clip; 41. 42. Card slot; 43. Second limiting slot; 5. Receiving slot; 5. Base; 51. Magnetic circuit cavity; 511. Second opening; 512. Limiting slot; 513. Limiting rib; 514. Fixing slot; 5141. Glue dispensing slot; 515. Limiting boss; 52. Contact cavity; 521. First opening; 522. Slot; 53. Insulating partition; 531. Through slot; 532. Insertion hole; 54. Auxiliary opening; 55. Clearance opening; 56. Pin slot; 57. Clearance opening; 58. Reinforcing rib; 6. Reaction spring; 61. Mounting section; 62. Inclined section; 7. Limiting rod; 8. Auxiliary moving spring; 9. Auxiliary stationary spring. Detailed Implementation

[0045] In this utility model, the terms "first," "second," and "third," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "front," "rear," "inner," "outer," and "top / bottom" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0047] Please see Figures 1-10 As shown, the present invention discloses a relay base structure, including a base 5. The base 5 has a contact cavity 52 for accommodating the contact portion of the relay and a magnetic circuit cavity 51 for accommodating the magnetic circuit portion 1 of the relay. The contact cavity 52 and the magnetic circuit cavity 51 are distributed horizontally and separated by an insulating partition 53. The insulating partition 53 separates the contact cavity 52 and the magnetic circuit cavity 51. The side wall of the base 5 has a first opening 521 for the contact portion to laterally enter the contact cavity 52 and a second opening 511 for the magnetic circuit portion 1 to laterally enter the magnetic circuit cavity 51. The first opening 521 and the second opening 511 are located on different sides of the base 5. Therefore, the base 5 of the present invention adopts a frame structure, which allows for a larger creepage distance and electrical clearance between the magnetic circuit portion 1 and the contact portion. In particular, the location of the first opening 521 and the second opening 511 on different sides of the base 5 further enhances the insulation performance between the magnetic circuit portion 1 and the contact portion.

[0048] In a preferred embodiment, the first opening 521 and the second opening 511 face opposite directions. Furthermore, the orientations of the first opening 521 and the second opening 511 are perpendicular to the distribution directions of the contact cavity 52 and the magnetic circuit cavity 51, respectively. Specifically, the contact cavity 52 and the magnetic circuit cavity 51 are distributed along the length of the base 5, and the first opening 521 and the second opening 511 face opposite directions in the width direction of the base 5. This design allows for a better layout within a limited space, thereby fully utilizing the internal space, reducing the overall size, and making the design more compact and efficient.

[0049] The inner wall of the magnetic circuit cavity 51 is provided with at least one limiting groove 512 corresponding to the yoke 12 of the magnetic circuit section 1, so that the portion of the yoke 12 corresponding to the limiting groove 512 is inserted into the limiting groove 512 in the direction in which the magnetic circuit section 1 enters the magnetic circuit cavity 51. Further, the outer side of the base 5 is provided with at least one fixing groove 514 leading to the magnetic circuit cavity 51, for the limiting protrusion 121 (e.g., ...) provided with the yoke 12. Figure 10 (As shown) Insert and fix with adhesive, such as Figure 5 As shown. The design of the limiting groove 512 not only ensures the accurate installation of the magnetic circuit part 1, but also enhances its stability within the magnetic circuit cavity 51, thereby improving the overall reliability and performance of the device. The design of the fixing groove 514 further prevents the magnetic circuit part 1 from moving or loosening within the magnetic circuit cavity 51, ensuring the stability and reliability of the magnetic circuit part 1; the adhesive fixing further enhances the connection strength between the fixing groove 514 and the limiting protrusion 121, ensuring that it will not loosen due to vibration or other external forces during long-term use.

[0050] In this embodiment, the magnetic circuit section 1 is vertically positioned within the magnetic circuit cavity 51 (i.e., the axis of the coil frame of the magnetic circuit section 1 is in the vertical direction) and adopts an inverted structure. Therefore, the yoke 12 of the magnetic circuit section 1 is inverted L-shaped. When the magnetic circuit section 1 adopts a normal mounting structure, its yoke 12 is L-shaped. The magnetic circuit cavity 51 has limiting grooves 512 on both sides corresponding to the yoke 12, and the outer side of the base 5 has fixing grooves 514 on both sides corresponding to the yoke 12. Each fixing groove 514 passes through the limiting groove 512 on the same side as the yoke 12. Specifically, as... Figure 2 , Figure 3 As shown, the limiting groove 512 corresponding to the vertical side of the yoke 12 extends vertically and is surrounded by the limiting rib 513 provided inside the magnetic circuit cavity 51 and the corresponding inner wall surface of the magnetic circuit cavity 51. The limiting groove 512 corresponding to the horizontal side of the yoke 12 is located at the upper left corner of the magnetic circuit cavity 51 and is inserted into the end of the horizontal side of the yoke 12. One fixing groove 514 leads to the limiting groove 512 corresponding to one side of the yoke 12, and the other fixing groove 514 leads to the first limiting groove 511 corresponding to the other side of the yoke 12. The limiting protrusion 121 is integrally formed with the yoke 12. Specifically, one limiting protrusion 121 is located on one side of the yoke 12 in the width direction and is approximately in the middle position; the other limiting protrusion 121 is located on the other side of the yoke 12 in the width direction and is at the end position, as shown. Figure 10 As shown.

[0051] In this embodiment, the armature 11 of the magnetic circuit part 1 cooperates with the moving spring part 2 of the contact part through the push card 4. The insulating partition 53 is provided with a through groove 531 corresponding to the push card 4, which connects the magnetic circuit cavity 51 and the contact cavity 52. ​​The through groove 531 is used to make way for and / or guide the push card 4. In this embodiment, the through groove 531 can both make way for the push card 4 and guide the movement of the push card 4. Specifically, the through groove 531 is a notch, and the orientation of its opening is the same as that of the second opening 511, that is, the two are located on the same side of the base 5. The push card 4 is inserted laterally into the through groove 531. A limiting rod 6 is connected to the side wall of the insulating partition 53 and / or the base 5 opposite to the first opening 521. The limiting rod 6 is used to restrict the push card 4 from exiting the through groove 531. The limiting rod 6 is roughly U-shaped, with its upper and lower ends inserted into the insertion holes 532 provided in the insulating partition wall 53, and its middle part extending vertically and stopping at the opening of the through groove 531. The side wall of the base 5 opposite to the first opening 521 is provided with a clearance opening 57 corresponding to the push card 4, which connects the contact cavity 52 and the through groove 531, so that the part of the push card 4 that is used to cooperate with the moving spring part 2 can enter the contact cavity 52 through the clearance opening 57.

[0052] In a preferred embodiment, the side wall of the base 5 opposite to the first opening 521 is further provided with an auxiliary opening 54 communicating with the contact cavity 52, for heat dissipation and / or to avoid splashes generated when the contact part breaks. Specifically, the auxiliary opening 54 not only helps with heat dissipation but also effectively avoids splashes generated when the contact part breaks, thereby significantly improving the withstand voltage level of the relay. The auxiliary opening 54 and the first opening 521 are located on opposite sides of the base 5, which can play a convection role, thereby further helping the heat generated by the operation of the magnetic circuit part 1 to dissipate to the outside. The auxiliary opening 54 is located below the aforementioned avoidance opening 57, and the two are vertically connected.

[0053] The bottom wall of the base 5 has lead grooves 56 corresponding to the lead-out pins of the contact portion, which are connected to the contact cavity 52 for lateral insertion of the lead-out pins of the contact portion. One side of the lead groove 56 has an opening, the orientation of which is the same as that of the first opening 521. The bottom of the coil frame of the magnetic circuit portion 1 has coil lead-out pins 17 and auxiliary contact portions. The base 5 has clearance openings 55 corresponding to the auxiliary contact portions and coil lead-out pins 17, leading to the magnetic circuit cavity 51. The clearance openings 55 are at least partially located on the side of the magnetic circuit cavity 51 away from the contact cavity 52. ​​Specifically, a portion of the clearance opening 55 is located on the side of the magnetic circuit cavity 51 away from the contact cavity 52, and the remainder is located at the bottom of the magnetic circuit cavity 51. This clearance opening 55 design simplifies the structure of the base 5, thereby facilitating the miniaturization of this invention.

[0054] In this embodiment, the insulating partition 53 is integrally formed with the base 5, and the thickness of the insulating partition 53 is 0.75-0.9 mm, with a preferred value of 0.8 mm. This design ensures that the insulating partition 53 has a large thickness, further improving the insulation performance and structural stability between the magnetic circuit part and the contact part.

[0055] As a preferred embodiment, the bottom surface or inner top surface of the magnetic circuit cavity 51 is provided with a limiting boss 515 corresponding to the armature 11 of the magnetic circuit section 1. Since the magnetic circuit section 1 has an inverted structure, the limiting boss 515 is located on the bottom surface of the magnetic circuit cavity 51. This design can limit the armature 11 to a certain extent when the product is dropped, thereby reducing the drop amplitude of the armature 11 and reducing the deformation of the compression spring (i.e., the limiting spring 16 below) of the magnetic circuit section 1, preventing the compression spring from becoming unrecoverable due to excessive deformation.

[0056] This invention discloses a relay base structure. The base's structural design significantly improves the creepage distance and electrical clearance between the magnetic circuit portion 1 and the contact portion, thereby enhancing the relay's insulation performance in the new energy field. The design of the first opening 521 and the second opening 511 enables a lateral insertion method for the magnetic circuit portion 1 and the contact portion. This design simplifies the installation process, making assembly more convenient and efficient. In particular, the opposite orientation of the first opening 521 and the second opening 511 maximizes the insulation performance between the magnetic circuit portion 1 and the contact portion, preventing misinstallation or collisions caused by improper operation during assembly. This improves assembly quality and efficiency and facilitates subsequent inspection and maintenance of the contact portion and magnetic circuit portion 1 from different directions.

[0057] Please see Figures 1-10 As shown, an electromagnetic relay of this utility model includes a contact portion, a magnetic circuit portion 1, and the base structure of the relay described in this utility model. The contact portion is inserted into the contact cavity 52 of the base 5 through a first opening 521, and the magnetic circuit portion 1 is inserted into the magnetic circuit cavity 51 through a second opening 511. This utility model also includes a housing (not shown in the figure), the bottom end of which has an opening and is connected to the base 5 to enclose the magnetic circuit portion 1 and the contact portion within its cavity.

[0058] like Figure 8 , Figure 9As shown, the contact portion includes a mating moving spring portion 2 and a stationary spring portion 3. The moving spring portion 2 adopts a short-circuit resistant structure, which includes a rigid moving spring piece 21, a moving contact 23, a rigid moving spring lead-out piece 22, and a flexible conductive element. The upper end of the rigid moving spring piece 21 is rotatably connected to the upper end of the moving spring lead-out piece 22, allowing the rigid moving spring piece 21 to rotate relative to the moving spring lead-out piece 22, thereby achieving contact or separation between the moving contact 23 and the stationary spring portion 3. The moving contact 23 is fixed to the lower end of the rigid moving spring piece 21 and is located on the side of the rigid moving spring piece 21 facing away from the moving spring lead-out piece 22. The flexible conductive element is preferably a flexible wire 25, which is connected between the upper end of the rigid moving spring piece 21 and the upper end of the moving spring lead-out piece 22 for current conduction and to reduce the force during the rotation of the rigid moving spring piece 21. The stationary spring section 3 includes a stationary spring sheet 31 and a stationary contact 32 disposed on the stationary spring sheet 31. The stationary spring sheet 31 is preferably a rigid spring sheet to improve the current carrying capacity.

[0059] The upper end of the rigid moving spring 21 is rotatably connected to the moving spring lead-out piece 22 via a rotating shaft 26. Specifically, the upper end of the rigid moving spring 21 is bent at both ends in the width direction towards the same side in the thickness direction to form two first lugs 211, and the upper end of the moving spring lead-out piece 22 is bent at both ends in the width direction towards the same side in the thickness direction to form two second lugs 221. The two first lugs 211 and the two second lugs 221 are respectively provided with shaft holes and are connected together by the rotating shaft 26. The lower end of the moving spring lead-out piece 22 is provided with a lead-out foot 222, which is integrally formed with the moving spring lead-out piece 22 and the two form an approximate 90° angle. The base 1 has two pin slots 56, which correspond one-to-one with the lead-out foot 222 of the moving spring lead-out piece 22 and the lead-out part of the stationary spring 31.

[0060] The magnetic circuit section 1 specifically includes a coil frame 13, a coil 14 wound around the coil frame 13, an iron core 15 inserted into a through hole in the coil frame 13, a yoke 12, and an armature 11. The yoke 12 is inverted L-shaped, with one side fitting against the outside of the coil frame 13 and extending downward, so that one end of the yoke 12 faces downward and has a knife edge. The other side of the yoke 12 extends horizontally and connects to the upper end of the iron core 15. The armature 11 is pivotally positioned at the knife edge of the yoke 12, and the armature 11 includes a first side 111 and a second side 112 extending from its pivot point. An angle is formed between the first side 111 and the second side 112, which is slightly greater than 90°, making the armature 11 approximately L-shaped. The first side 111 of the armature 11 has a mating surface for magnetically engaging with the lower end of the iron core 15. The second side 112 of the armature 11 extends upward and engages with the outer side of one side of the yoke 12. The upper end of the second side 112 is connected to the rigid moving spring 21 by a push card 4.

[0061] Since the swing fulcrum of the armature 11 is at the bottom and the rotation fulcrum of the rigid moving spring 21 is at the top, the position of the push card 4 can be changed by adjusting the length of the second side 112, thereby changing the contact gap of the contact part in the disconnected state. As the length of the second side 112 increases, the contact gap also increases.

[0062] This utility model also includes an elastic element, which is installed on the base 5 and cooperates with the rigid moving spring 21. When the rigid moving spring 21 swings in the contact closing direction, the elastic element is compressed or stretched to store energy. When the rigid moving spring 21 swings in the contact opening direction, the elastic element releases the stored energy, driving the rigid moving spring 21 and armature 11 to reset. In this embodiment, the elastic element is preferably a reaction spring 6, which is located on the side of the rigid moving spring 21 opposite to the moving spring lead-out piece 22, and one end of the reaction spring 6 is in abutting or clearance fit with the rigid moving spring 21. The reaction spring 6 is bent and includes an installation section 61 above the bend line and an inclined section 62 below the bend line. The installation section 61 is installed on the base 5, specifically, the installation section 61 is laterally inserted into the slot 522 provided on the side wall of the base 5; the inclined section 62 is inclined towards the side close to the rigid moving spring 21, and the end of the inclined section 62 is in abutting fit with the rigid moving spring. Furthermore, the end of the inclined section 62 is rounded, and this rounded corner abuts against the side of the rigid moving spring 21 where the moving contact 23 is located. The lateral opening of the aforementioned slot 522 is positioned opposite to the first opening 521, and the reaction spring 6 also enters the contact cavity 52 through the first opening 521 and is laterally inserted into the slot 522, as shown. Figure 7 As shown.

[0063] A contact spring 24 is mounted on the side of the rigid moving spring 21 facing away from the moving contact 23. The push card 4 is also connected to the contact spring 24 so that the rigid moving spring 21 can be pushed towards the stationary spring portion 3 by pushing the contact spring 24, thereby generating overtravel and increasing the contact pressure. Specifically, the lower end of the contact spring 24 is riveted to the lower end of the rigid moving spring 21 together with the moving contact 23. There is a gap between the upper end of the contact spring 24 and the rigid moving spring 21, and both are respectively inserted into the corresponding slots 41 of the push card 4.

[0064] The armature 11 is connected to the armature 11 by a limiting spring 16, so that the armature 11 can be held at the knife edge of the yoke 12 in a swingable manner. Specifically, the limiting spring 16 is roughly L-shaped. One side of the limiting spring 16 is connected (preferably riveted) to the outer side of one side of the yoke 12 and has a hollow hole to avoid the second side 112 of the armature 11. The other side of the limiting spring 16 is connected (preferably riveted) to the side of the first side 111 of the armature 11 that is opposite to the iron core 15.

[0065] The design of the aforementioned elastic element (i.e., the reaction spring 6) not only meets the functional requirements of rapid disconnection and reset under large contact gap conditions, but also eliminates the need for a spring on the armature 11 to provide reaction force. That is, the limiting spring 16 only needs to perform the limiting function, not the reset function, making the structure and assembly of the limiting spring 16 more convenient and reducing the space requirements of the product. This allows the present invention to not only achieve overall miniaturization but also reduce the resistance during the movement of the armature 11, making the swing of the armature 11 smoother. In this way, the present invention not only improves the performance and reliability of the electromagnetic relay but also simplifies the structure, reduces manufacturing costs, and is suitable for applications requiring higher safety standards.

[0066] The auxiliary contact assembly includes an auxiliary moving spring 8 and an auxiliary stationary spring 9 that cooperate with each other. The auxiliary moving spring 8 is driven by a driving part 114 provided at the tail of the first side 111 of the armature 11 to contact or separate from the auxiliary stationary spring 31. In this embodiment, the driving part 114 is integrally formed with the first side 111 of the armature 11, but it is not limited to this. In other embodiments, the driving part is an insulating part fixed to the armature 11.

[0067] This invention relates to an electromagnetic relay, which combines the short-circuit protection structure of the moving spring part 2 with the inverted design of the magnetic circuit part 1. This allows the position of the push card 4 to be changed by adjusting the length of the second side 112, thereby altering the contact gap. Therefore, this invention provides a structural basis for achieving a large contact gap, enabling the relay to achieve a large contact gap according to actual needs. This eliminates the need for connecting multiple relays in series or using larger, more complex relay solutions, thus simplifying the structure, reducing costs, and meeting the application requirements of high safety standards.

[0068] Example 2

[0069] Please see Figures 11-17 As shown, the present invention discloses a relay base structure and an electromagnetic relay, which differs from the first embodiment described above in that: the base 1 has a reinforcing rib 58 between the auxiliary opening 54 and the clearance opening 57, which separates the auxiliary opening 54 from the clearance opening 57. The reinforcing rib 58 between the auxiliary opening 54 and the clearance opening 57 effectively avoids the weakening of the base sidewall structure caused by direct penetration between the two, thereby significantly improving the overall strength and rigidity of the base sidewall.

[0070] In this embodiment, a dotted adhesive groove 5141 is formed in the fixing groove 514 to facilitate precise control of the amount of adhesive and guide the flow of adhesive during the assembly process, ensuring uniform and reliable bonding, while improving assembly efficiency.

[0071] In this embodiment, the through groove 531 of the insulating partition 53 is also a notch groove, which is used to allow the push card 4 to move. The aforementioned limiting rod 6 is not provided on the insulating partition 53.

[0072] The present invention relates to a relay base structure and an electromagnetic relay. The parts not described herein are the same as or can be implemented using existing technologies.

[0073] The above embodiments are only used to further illustrate the base structure of a relay and an electromagnetic relay of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A relay base structure, comprising a base, characterized in that: The base is provided with a contact cavity for accommodating the contact portion of the relay and a magnetic circuit cavity for accommodating the magnetic circuit portion of the relay. An insulating partition wall is provided between the contact cavity and the magnetic circuit cavity to separate them. The base sidewall is provided with a first opening for the contact portion to be laterally inserted into the contact cavity, and a second opening for the magnetic circuit portion to be laterally inserted into the magnetic circuit cavity, the first opening and the second opening being located on different sides of the base.

2. The relay base structure according to claim 1, characterized in that: The first opening and the second opening face opposite directions.

3. The relay base structure according to claim 2, characterized in that: The orientations of the first opening and the second opening are perpendicular to the distribution directions of the contact cavity and the magnetic circuit cavity, respectively.

4. The relay base structure according to claim 1, characterized in that: The inner wall of the magnetic circuit cavity is provided with at least one limiting groove corresponding to the yoke of the magnetic circuit portion, so that the portion of the yoke corresponding to the limiting groove is inserted into the limiting groove in the direction in which the magnetic circuit portion enters the magnetic circuit cavity.

5. The relay base structure according to claim 4, characterized in that: The outer side of the base is provided with at least one fixing groove leading to the magnetic circuit cavity, which is used to insert and cooperate with the limiting protrusion of the yoke and fix it with glue; a glue groove is formed inside the fixing groove.

6. The relay base structure according to claim 5, characterized in that: The yoke is L-shaped or inverted L-shaped. The magnetic circuit cavity is provided with limiting grooves on both sides of the yoke, and the outer side of the base is provided with fixing grooves on both sides of the yoke. Each fixing groove passes through the limiting groove on the same side of the yoke.

7. The relay base structure according to claim 2, characterized in that: The armature of the magnetic circuit part cooperates with the moving spring part of the contact part through the push card. The insulating partition wall is provided with a through groove corresponding to the push card to connect the magnetic circuit cavity and the contact cavity, so as to make way for and / or guide the push card.

8. The relay base structure according to claim 7, characterized in that: The through groove is a notched groove, and the orientation of its opening is the same as that of the second opening; the side wall of the base opposite to the first opening is provided with an avoidance opening that connects the contact cavity and the through groove to the push card.

9. The relay base structure according to claim 8, characterized in that: The base is provided with an auxiliary opening on the side wall opposite to the first opening, which communicates with the contact cavity for heat dissipation and / or to avoid splashes generated when the contact part is disconnected; the auxiliary opening is located below the avoidance opening and the two are vertically connected, or the base is provided with a reinforcing rib between the auxiliary opening and the avoidance opening, which separates the auxiliary opening from the avoidance opening.

10. The relay base structure according to claim 1, characterized in that: The bottom wall of the base is provided with pin slots corresponding to the lead-out pins of the contact portion, which are connected to the contact cavity. One side of the pin slot is provided with an opening, and the orientation of the opening is the same as that of the first opening. The bottom of the coil frame of the magnetic circuit portion is provided with coil lead-out pins and auxiliary contact portion. The base is provided with clearance openings leading to the magnetic circuit cavity corresponding to the auxiliary contact portion and coil lead-out pins. The clearance openings are at least partially located on the side of the magnetic circuit cavity away from the contact cavity.

11. The relay base structure according to claim 1, characterized in that: The insulating partition wall is integrally formed with the base; the thickness of the insulating partition wall is 0.75-0.9mm.

12. The relay base structure according to claim 1, characterized in that: The bottom surface or inner top surface of the magnetic circuit cavity is provided with a limiting boss corresponding to the yoke of the magnetic circuit section.

13. An electromagnetic relay, comprising a contact portion and a magnetic circuit portion, characterized in that: It also includes a base structure for a relay as described in any one of claims 1-12, wherein the contact portion is inserted into the contact cavity through the first opening, and the magnetic circuit portion is inserted into the magnetic circuit cavity through the second opening.

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