Small-size large-current relay

Abstract

The invention discloses a small-size large-current relay, and relates to the technical field of relays. The device comprises a shell, a base is fixedly connected to the inner wall of the shell, a coil holder is fixedly installed on the surface of the base, an iron core is fixedly inserted into the surface of the coil holder, a coil is wound on the surface of the iron core, an armature is arranged on the right side of the coil holder, a hook is rotationally connected to the surface of the armature, and a push piece is arranged below the armature. The surface of the push piece is rotatably connected with a movable spring, the end part of the movable spring is fixedly connected with a movable contact, a movable spring pin is arranged below the movable spring, a static spring is fixedly inserted into the left side surface of the shell, and the top surface of the static spring is fixedly connected with a static contact. The small-size large-current relay has the advantages of being compact in structure, good in heat dissipation performance, easy and convenient to assemble, low in height, high in current bearing capacity and the like, and the requirement of modern electronic equipment for a high-performance relay can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and particularly to a small-sized high-current relay. Background Art

[0002] With the rapid development of modern electronic technology, electronic devices are constantly evolving towards miniaturization, high power, and high efficiency. In this process, relays, as key actuating elements in circuit control systems, play a crucial role in the stable operation and function realization of the entire electronic device. However, traditional relays have gradually exposed some problems in design and performance that are difficult to meet the requirements of modern electronic devices.

[0003] Traditional relays usually adopt a structural design with the contact above the coil. When the relay is working under load, this design will cause heat to conduct repeatedly in the relay cavity, resulting in excessive temperature rise. Excessive temperature rise will not only accelerate the aging of the internal materials of the relay, shorten its service life, but also may affect the electrical and mechanical properties of the relay, leading to problems such as increased contact resistance and contact welding. In severe cases, it may even cause circuit failures and affect the reliability of the entire electronic device.

[0004] In addition, the assembly process of traditional relays is complex and the process flow is long. For example, the implantation of coil pins requires multiple sets of molds and complex cutting processes, which not only increases the production cost but also reduces the production efficiency. At the same time, the assembly of the armature and the push piece usually adopts the methods of embedding and dispensing glue, which not only increases the assembly difficulty but also may cause the relay to act inflexibly and inaccurately due to assembly accuracy problems, affecting its performance and reliability.

[0005] In the field of high-current relays, existing products often have difficulty in achieving the compatibility of small size and high current. To meet the high-current carrying capacity, it is usually necessary to increase the size, thickness, and material of the contacts, which will cause the volume of the relay to increase and it is difficult to meet the requirements of modern electronic devices for miniaturization. In addition, existing high-current relays often lack flexibility in design and are difficult to achieve the common-mode design of high and low currents and wide and narrow lead pins, which increases the R & D and production costs and limits their promotion and use in different application scenarios.

[0006] Therefore, a small-sized high-current relay is proposed. Summary of the Invention

[0007] The purpose of the present invention is: to solve the problems mentioned in the above background art, the present invention provides a small-sized high-current relay.

[0008] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0009] A small-sized high-current relay, comprising a housing, wherein the inner wall of the housing is fixedly connected with a base, the surface of the base is fixedly installed with a wire holder, the surface of the wire holder is fixedly inserted with an iron core, a coil is wound around the surface of the iron core, an armature is arranged on the right side of the wire holder, a hook is rotatably connected to the surface of the armature, a push piece is arranged below the armature, a moving reed is rotatably connected to the surface of the push piece, a moving contact is fixedly connected to the end of the moving reed, a moving reed foot is arranged below the moving reed, a static reed is fixedly inserted into the left side surface of the housing, a static contact is fixedly connected to the top surface of the static reed, a coil foot is fixedly connected below the coil, and a yoke is fixedly connected to the surface of the base.

[0010] Further, the height of the coil does not exceed five millimeters, the coil is located at the top of the relay, and directly below it are the moving and static reed operating parts of the relay.

[0011] Further, air vent grooves are transversely opened on the two long sides of the base, and two air vent holes are opened at the top of the housing.

[0012] Further, the armature and the push piece are of a split structure, the push piece adopts an extended stepped flat piece type design, the overall height of the relay does not exceed twenty millimeters, and the GAP stroke is not less than two point three millimeters.

[0013] Further, after the magnetic circuit is riveted, the yoke is directly inserted into the base from the side, and the thickness of the insulating wall between the magnetic circuit and the moving and static reeds is zero point four millimeters.

[0014] Further, a small dot-shaped spherical boss is provided on the end face of the rotation axis of the push piece.

[0015] The beneficial effects of the present invention are as follows:

[0016] This relay adopts the design that the coil is at the top of the relay, and directly below it are the moving and static reed operating parts, effectively reducing the repeated conduction of heat generated during the operation and loading of the relay in the cavity and reducing the temperature rise. The air vent grooves transversely opened on the two long sides of the base and the air vent holes at the top of the housing contribute to the discharge of high-temperature gas and further enhance the heat dissipation effect.

[0017] The coil foot of the relay adopts a pin insertion design, reducing the mold and cutting process of the coil foot and simplifying the process of implanting the coil foot. The split design of the armature and the push piece and the extended stepped flat piece type design of the push piece enable the overall height of the relay to be controlled within twenty millimeters, while ensuring that the GAP stroke is not less than two point three millimeters. After the magnetic circuit is riveted, the yoke is directly inserted into the base from the side, and the thickness of the insulating wall between the magnetic circuit and the moving and static reeds is zero point four millimeters. This design not only improves the creepage distance of the product but also ensures the stability and consistency of the assembly.

[0018] The design of this relay can be common-mode for all aspects except for replacing the contact size, silver layer thickness, contact material, thickness of the reed material, and bending angle, without the need to add new molds. It can achieve a common-mode design that is fully compatible from 20 - 55A, meeting the requirements of different application scenarios.

[0019] Therefore, the small-size high-current relay of the present invention has the advantages of a compact structure, good heat dissipation performance, simple assembly, low height, and strong current-carrying capacity, and can meet the requirements of modern electronic devices for high-performance relays. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic perspective view of the present invention;

[0021] Figure 2 is a schematic internal structure view of the present invention;

[0022] Figure 3 is a schematic armature structure view of the present invention;

[0023] Figure 4 is a schematic base structure view of the present invention;

[0024] Figure 5 is a schematic moving reed structure view of the present invention;

[0025] Reference numerals: 1 coil, 2 bobbin, 3 iron core, 4 armature, 5 hook, 6 moving reed foot, 7 coil foot, 8 moving reed, 9 push piece, 10 static reed, 11 static contact, 12 moving contact, 13 yoke, 14 base, 15 housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0029] All electrical components appearing in this text are electrically connected to an external main controller and the 220V mains power supply, and the main controller can be a conventional known device such as a computer for control.

[0030] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0031] As Figures 1 to 5 shown, a small-size high-current relay includes a housing 15. The housing 15 is an external protection structure of the relay. The inner wall of the housing 15 is fixedly connected with a base 14. The base 14 is the core support component of the relay, used for installing and fixing other components. A wire holder 2 is fixedly installed on the surface of the base 14. A core 3 is fixedly inserted on the surface of the wire holder 2. A coil 1 is wound around the surface of the core 3. An armature 4 is arranged on the right side of the wire holder 2. A hook 5 is rotatably connected to the surface of the armature 4. A push piece 9 is arranged below the armature 4. A moving contact spring 8 is rotatably connected to the surface of the push piece 9. A moving contact 12 is fixedly connected to the end of the moving contact spring 8. A moving contact spring foot 6 is arranged below the moving contact spring 8. A static contact spring 10 is fixedly inserted on the left side surface of the housing 15. A static contact 11 is fixedly connected to the top surface of the static contact spring 10. The designs of the moving contact spring foot 6 and the static contact spring 10 enable the relay to stably perform the on-off operation of the circuit during operation. A coil foot 7 is fixedly connected below the coil 1. A yoke 13 is fixedly connected to the surface of the base 14.

[0032] When the coil foot 7 of the relay is energized, the coil 1 is powered on to generate a magnetic field. The large end surface of the core 3 accumulates magnetic force, attracting the armature 4 from the static outwardly deflected position to be attracted and engaged with the large end surface of the core 3. Due to the lever principle, the bent portion of the armature 4 rotates around the edge of the tip of the knife edge of the yoke 13 pressed by the hook 5, pushing the push piece 9, causing the moving contact spring 8 to move towards the static contact spring 10 side, thereby realizing the contact between the moving contact 12 and the static contact 11 and completing the process of the relay changing from open to closed.

[0033] The height of coil 1 does not exceed five millimeters. Coil 1 is located at the top of the relay, and directly below it are the moving and static reed operating parts of the relay. This design can effectively reduce the repeated conduction of heat generated when the relay is working under load in the cavity and lower the temperature rise.

[0034] On the two long sides of the base 14, ventilation grooves are transversely provided, and two ventilation holes are provided at the top of the outer shell 15, which helps the relay dissipate heat during operation and reduces the temperature rise.

[0035] The armature 4 and the push piece 9 are of a split structure. The push piece adopts an extended stepped flat piece type design. The overall height of the relay does not exceed twenty millimeters, and the GAP stroke is not less than 2.3 millimeters. Through the lever principle, the overall height of the relay does not exceed twenty millimeters, and the GAP stroke is not less than 2.3 millimeters.

[0036] After the magnetic circuit is riveted, the yoke 13 is directly inserted into the base 14 from the side. The thickness of the insulating wall between the magnetic circuit and the moving and static reeds is 0.4 millimeters. This can greatly increase the creepage distance of the product and ensure the electrical safety performance of the relay.

[0037] On the end face of the rotating shaft of the push piece 9, there is a small dot-shaped spherical convex platform. This can reduce the rotational friction of the push piece when it is attracted and disconnected, making the product operate more flexibly and accurately.

[0038] In summary: This relay adopts the design that the coil is at the top of the relay, and directly below it are the moving and static reed operating parts, which effectively reduces the repeated conduction of heat generated when the relay is working under load in the cavity and lowers the temperature rise. The ventilation grooves transversely provided on the two long sides of the base and the ventilation holes at the top of the outer shell help the discharge of high-temperature gas and further enhance the heat dissipation effect.

[0039] The coil pins of the relay adopt the insert PIN design, which reduces the molds and cutting processes of the coil pins and simplifies the process of implanting the coil pins. The split design of the armature and the push piece and the extended stepped flat piece type design of the push piece make the overall height of the relay controlled within twenty millimeters, and at the same time ensure that the GAP stroke is not less than 2.3 millimeters. After the magnetic circuit is riveted, the yoke is directly inserted into the base from the side, and the thickness of the insulating wall between the magnetic circuit and the moving and static reeds is 0.4 millimeters. This design not only increases the creepage distance of the product but also ensures the stability and consistency of the assembly.

[0040] Except for changing the contact size, silver layer thickness, contact material, reed thickness and bending angle, the design scheme of this relay can be in common mode without adding new molds. It can achieve a full-compatible common mode design from 20 - 55A to meet the requirements of different application scenarios.

[0041] Therefore, the small-size high-current relay of the present invention has the advantages of compact structure, good heat dissipation performance, simple assembly, low height, strong current-carrying capacity, etc., and can meet the requirements of modern electronic devices for high-performance relays.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A small volume, high current relay, characterized in that: The invention comprises a shell (15), the inner wall of the shell (15) is fixedly connected to a base (14), a wire rack (2) is fixedly installed on the surface of the base (14), an iron core (3) is fixedly inserted on the surface of the wire rack (2), a coil (1) is wound on the surface of the iron core (3), an armature (4) is arranged on the right side of the wire rack (2), a hook (5) is rotatably connected to the surface of the armature (4), a push piece (9) is arranged below the armature (4), and the The surface of the push piece (9) is rotatably connected to a movable spring (8), the end of the movable spring (8) is fixedly connected to a movable contact (12), a movable spring foot (6) is provided below the movable spring (8), a static spring (10) is fixedly inserted into the left side of the housing (15), the top surface of the static spring (10) is fixedly connected to a static contact (11), a coil foot (7) is fixedly connected below the coil (1), and a yoke (13) is fixedly connected to the surface of the base (14).

2. A small volume, high current relay according to claim 1, characterized in that: The height of the coil (1) does not exceed five millimeters. The coil (1) is located at the top of the relay, with the dynamic and static spring action parts of the relay directly below it.

3. A small volume and high current relay according to claim 1, characterized in that: The two long sides of the base (14) are provided with ventilation grooves in the transverse direction, and the top of the shell (15) is provided with two ventilation holes.

4. A small volume and large current relay according to claim 1, characterized in that: The armature (4) and the push piece (9) are of separate structures, and the push piece adopts an extended step flat piece design. The overall height of the relay does not exceed 20 mm, and the GAP stroke is not less than 2.3 mm.

5. A small volume and high current relay according to claim 1, characterized in that: After the magnetic circuit is riveted, the yoke (13) is directly embedded in the base (14) at the side, and the thickness of the insulating wall between the magnetic circuit and the dynamic and static springs is 0.4 mm.

6. A small volume and large current relay according to claim 1, characterized in that: The end surface of the rotating shaft of the push piece (9) is provided with a small dot spherical boss.

Images