A relay

Abstract

This invention relates to a relay, comprising a base, a drive module, a magnetic circuit module, and a contact portion. The contact portion is fixedly mounted on the base and includes a stationary contact and a moving contact for making the circuit open or closed. The magnetic circuit module provides electromagnetic driving force to drive the drive module. The drive module and the moving contact are linked and used to push the moving contact closer to or away from the stationary contact. Both the drive module and the magnetic circuit module are modular structures that can be pre-assembled independently. With the base positioned at the bottom of the relay, the drive module and the magnetic circuit module are inserted downwards into the base, and the drive module and the moving contact are connected in a vertical direction. The magnetic circuit module and the drive module are also connected in a vertical direction. This invention is more conducive to automated production. The magnetic circuit module and the drive module have simple structures and are compactly matched, enabling product miniaturization and low cost.

Description

Technical Field

[0001] This invention relates to a relay, specifically a relay with a modular mounting structure. Background Technology

[0002] Relays, as electronic components that control strong signals with weak signals, are widely used in industrial control, home appliances, automobiles, and other fields. A relay generally consists of a base, contact parts, and a drive part. The base serves as the mounting support for the relay. The contact parts include moving and stationary contacts, used to control the on / off state of the circuit. The drive part includes a magnetic circuit system and a driving part. The magnetic circuit system provides electromagnetic driving force to drive the driving part. The driving part is linked to the moving contact and is used to push the moving contact closer to or away from the stationary contact, thus switching the circuit on / off.

[0003] The current trend in relay development is towards smaller height and installation area, stronger load capacity, higher reliability, and simultaneously higher cost requirements. In areas with high load switching, such as home appliances, existing technology generally uses one or two sets of relays to simultaneously disconnect the live or neutral wire to improve safety. However, given the limitations of product height and installation area, current technology allows for relays with horizontally arranged contact parts, such as patent CN106653488A. In this case, the contact system is located at the bottom of the base, resulting in a small installation cavity, poor heat dissipation, and excessively high relay pin temperature rise. This makes it difficult to widely apply in areas with stringent temperature requirements, such as sockets and high-capacity lighting control panels. Furthermore, due to the limitations of relay width requirements, the electrical insulation distance between the moving and stationary contacts is small, making them prone to dielectric withstand voltage failure. The moving and stationary contacts may not effectively interrupt the arc, leading to safety issues such as relay combustion and fire. There are also relays with vertically arranged contact parts, such as patent CN107706052A. In this type of relay, the connection and cooperation structure between the magnetic circuit system and the driving part is relatively complex. Moreover, due to the limitations of the traditional swing-type driving part structure, it is difficult to pre-assemble the magnetic circuit system and the driving part into independent modules, and it is also difficult to assemble them through automated production equipment, which restricts the production efficiency of the relay and results in high assembly costs. Summary of the Invention

[0004] Therefore, in order to address the above problems, this invention proposes a structurally optimized relay.

[0005] This invention is achieved using the following technical solution:

[0006] This invention proposes a relay, including a base, a drive module, a magnetic circuit module, and a contact portion. The contact portion is fixedly mounted on the base and includes a stationary contact portion and a moving contact portion for realizing circuit conduction or disconnection. The magnetic circuit module provides electromagnetic driving force to drive the drive module. The drive module and the moving contact portion are linked and connected to each other, and the drive module is used to push the moving contact portion relatively closer to or away from the stationary contact portion. Both the drive module and the magnetic circuit module are modular structures that can be pre-assembled independently. With the base located at the lower part of the relay, the drive module and the magnetic circuit module are inserted and assembled downwards on the base, and the drive module and the moving contact portion are inserted and connected in the vertical direction. The magnetic circuit module and the drive module are also inserted and connected in the vertical direction.

[0007] In one embodiment, the magnetic circuit module includes a magnetic attraction driving part, which is a semi-enclosed structure with an opening facing downwards. The pushing module includes a magnetic conductor inserted vertically into the magnetic attraction driving part. The magnetic attraction of the magnetic conductor by the magnetic attraction driving part drives the pushing module.

[0008] In one embodiment, the magnetic circuit module includes a coil, a coil frame, an iron core, and a yoke. The coil is wound on the coil frame, the iron core is inserted and fixed to the coil frame, and the yoke is placed on the upper end of the coil frame with the axis of the coil as the front-back direction. The rear end and the front end of the iron core both extend out of the coil frame. The rear end of the yoke is bent downward and inserted into contact with the rear end of the iron core. The front end of the iron core and the front end of the yoke form the magnetic attraction drive part.

[0009] In one embodiment, the front end of the iron core is a vertical plate-like structure, and the front end of the yoke is a downward-opening "U"-shaped branch structure. The front end of the iron core extends into the front end of the yoke, thereby forming a downward-opening inverted "E"-shaped magnetic attraction drive part.

[0010] In one embodiment, the pushing module includes a main body, and two magnetic conductors are provided, namely a first magnetic conductor and a second magnetic conductor. The first magnetic conductor and the second magnetic conductor are both vertical sheet-like structures. The first magnetic conductor and the second magnetic conductor are interposed and embedded in the main body at intervals. The inverted "E"-shaped magnetic attraction drive part has two parallel insertion gaps, and the first magnetic conductor and the second magnetic conductor are respectively inserted into the two insertion gaps.

[0011] In one embodiment, the main body is provided with a first slot and a second slot corresponding to the first magnetic conductor and the second magnetic conductor, respectively. The first slot is located to the left of the second slot, and the second slot is located to the right of the first slot. The main body has a window on the left side of the first slot and a window on the right side of the second slot to expose the first magnetic conductor and the second magnetic conductor inside the first slot and the second slot, respectively. When the push module and the magnetic circuit module are plugged in, the left and right ends of the yoke are respectively inserted outside the two windows.

[0012] In one embodiment, the pushing module further includes a magnet, which is also inserted and embedded in the main body. The magnet is disposed between the first magnetic conductor and the second magnetic conductor, and its two ends are respectively connected to the first magnetic conductor and the second magnetic conductor.

[0013] In one embodiment, the main body is further provided with a core slot located between the first magnetic conductor and the second magnetic conductor, and the front end of the core is inserted into the core slot.

[0014] In one embodiment, the base is provided with an upward-opening mounting slot, and both the pushing module and the magnetic circuit module are inserted into the mounting slot.

[0015] In one embodiment, the pushing module includes a main body and a pushing arm extending outward from the side of the main body. The wall of the mounting groove has an upward-opening notch. The main body is inserted into the mounting groove, and the pushing arm is inserted into the notch, so that the pushing arm protrudes outward from the mounting groove. The contact portion is fixedly disposed on the outside of the mounting groove and is inserted vertically with the pushing arm.

[0016] In one embodiment, the push arm is provided with a downward-opening movable spring slot, the movable contact part is a vertical plate structure, and the movable spring slot is inserted downward into the movable contact part.

[0017] In one embodiment, a partition plate is also fixedly connected to the push arm, and the partition plate covers the outside of the notch.

[0018] The present invention has the following beneficial effects:

[0019] 1. In this invention, since both the magnetic circuit module and the drive module are modular structures that can be pre-assembled independently, and the magnetic circuit module and the drive module are connected by plugging in the vertical direction, when assembling the relay, it is only necessary to install the magnetic circuit module and the drive module downwards onto the base and complete the plugging. The installation structure is simple and more efficient. In addition, the drive module and the moving contact part are also connected by plugging in the vertical direction, and the contact part can also be plugged downwards and fixed to the base, which is more conducive to the automated production of the product. The magnetic circuit module and the drive module have simple structures, and the two are compactly matched, which can achieve the requirements of product miniaturization and low cost.

[0020] 2. The moving and stationary contacts of the two sets of contact parts extend forward beyond the driving part. This increases the lateral movement and installation space of the contacts, avoiding problems such as poor heat dissipation and insufficient electrical insulation distance.

[0021] 3. The two sets of contact parts are respectively located on the left and right outermost sides of the base. The installation space of the two sets of contact parts is open, with a large heat dissipation space, which can effectively reduce the temperature rise of the contacts and pins, reduce the risk of contact bonding failure, and effectively improve the reliability of the relay operation. Attached Figure Description

[0022] Figure 1 This is a preliminary exploded view of the relay structure in the embodiment;

[0023] Figure 2 This is a schematic diagram of the internal structure of the relay in the embodiment;

[0024] Figure 3 This is a further exploded view of the relay structure in the embodiment;

[0025] Figure 4 This is an exploded view of the magnetic circuit module in the embodiment;

[0026] Figure 5 This is an exploded view of the drive module in the embodiment. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0029] See Figure 1-3As shown in the preferred embodiment of the present invention, a relay is provided, specifically an electromagnetic relay, including a base 1, a drive module 2, a magnetic circuit module 3, a contact portion 5, and a cover 4. The drive module 2, magnetic circuit module 3, and contact portion 5 are all mounted on the base 1, and the cover 4 covers the base 1. The contact portion 5 has two sets, fixedly mounted on the base 1, including a stationary contact portion 52 and a moving contact portion 51 arranged opposite each other. The moving contact portion 51 has a moving contact 511, and the stationary contact portion 52 has a stationary contact 521. The moving contact 511 and the stationary contact 521 are arranged opposite each other. The magnetic circuit module 3 provides electromagnetic driving force to drive the drive module 2. The drive module 2 and the moving contact portion 51 are linked together, and the drive module 2 pushes the moving contact 511 on the moving contact portion 51 closer to or further away from the stationary contact 521 on the stationary contact portion 52, thereby achieving circuit connection or disconnection. For ease of description, this embodiment defines the base 1 as being located at the lower part of the relay, the opposite direction to the downward direction as upward, and the relative setting direction of the moving contact 511 and the stationary contact 521 as the left-right direction.

[0030] In this embodiment, both the pushing module 2 and the magnetic circuit module 3 are downwardly inserted and assembled on the base 1. The pushing module 2 and the moving contact part 51 are connected in a vertical direction, and the magnetic circuit module 3 and the pushing module 2 are also connected in a vertical direction. In this embodiment, both the static contact part 52 and the moving contact part 51 are vertically plate-shaped structures, and are downwardly inserted and fixed on the base 1. Because the moving contact part 51 is a vertically plate-shaped structure, it is easier to connect and engage vertically with the pushing module 2. Figure 3 The magnetic circuit module 3 includes a magnetic drive unit 30, which is an inverted "E"-shaped fork-tooth structure with an opening facing downwards (more specifically, an approximate "E" shape that tilts after being rotated 90 degrees clockwise). The push module 2 includes a magnetic conductor that is vertically inserted into the magnetic drive unit 30. The magnetic drive unit 30 drives the push module 2 to move left and right by magnetically attracting the magnetic conductor. In this embodiment, the fork-tooth structure of the magnetic drive unit 30 forms a vertical connection with the push module 2, which can reliably achieve magnetic drive of the push module 2 and facilitate the insertion, positioning, and linkage of the push module 2 and the magnetic circuit module 3. In other embodiments, the magnetic drive unit 30 can be replaced with a downwardly opening semi-enclosed structure, which at least has a magnetic space for the magnetic conductor of the push module 2 to be inserted upwards.

[0031] Specifically, such as Figure 3 , 4The magnetic circuit module 3 includes a coil 32, a coil frame 36, an iron core 33, and a yoke 31. The coil 32 is wound on the coil frame 36. The iron core 33 is inserted and fixed to the coil frame 36 and passes through the coil 32 in space. The yoke 31 has a sheet-like structure and is placed on the upper end of the coil frame 36. With the axis of the coil 32 as the front-rear direction, both the rear end 332 and the front end 331 of the iron core extend out of the coil frame 36. The rear end 312 of the yoke is bent downward and has a socket for insertion into the rear end 332 of the iron core. The rear end 332 of the iron core and the rear end 312 of the yoke are in contact to position and fix the yoke 31. The front end 331 of the iron core and the front end 311 of the yoke form a magnetic drive unit 30. This configuration makes the magnetic circuit module 3 a modular structure that can be pre-assembled independently. Before the overall assembly of the relay, the magnetic circuit module 3 can be pre-assembled to improve assembly efficiency.

[0032] In this embodiment, the front end 331 of the iron core is a vertical plate-like structure, and the front end 311 of the yoke is a downward-opening "U"-shaped branched structure. The front end 331 of the iron core extends into the front end 311 of the yoke, thus forming the magnetic attraction drive part 30 with the front end 331 of the iron core and the front end 311 of the yoke downward-opening inverted "E" shape. This structure of the magnetic attraction drive part 30 does not require high precision in fitting, but has a strong magnetic attraction effect and good reliability. In this embodiment, the upper end of the front end 331 of the iron core is disconnected from the front end 311 of the yoke to avoid short-circuiting the magnet 24 (see the part of the push module 2 below). This embodiment adopts the above symmetrical magnetic attraction drive part 30 structure. The magnetic attraction drive part 30 has reliable attraction force and good heat dissipation performance. The symmetrical magnetic attraction drive part 30, combined with the two sets of contact parts 5 respectively arranged on both sides, enables the conduction / disconnection actions of the two sets of contact parts 5 to be symmetrical and synchronous.

[0033] In this embodiment, the coil frame 36 is provided with downwardly extending coil pins 361, which are inserted and fixed to the base 1. To further facilitate the positioning of the yoke 31, the coil frame 36 is provided with positioning grooves 362 that match the width of the rear end 312 of the yoke, and the rear end 332 of the iron core fits in the positioning grooves 362.

[0034] like Figure 3 , 5The push module 2 includes an insulated main body 21. Two magnetic conductors are provided: a first magnetic conductor 22 and a second magnetic conductor 23. Both the first and second magnetic conductors 22 and 23 are vertically arranged sheet-like structures. The first and second magnetic conductors 22 and 23 are interlocked and embedded within the main body 21. The inverted "E"-shaped magnetic drive part 30 has two parallel insertion gaps, in which the first and second magnetic conductors 22 and 23 are respectively inserted. Because the first and second magnetic conductors 22 and 23 are interlocked and embedded within the main body 21, the push module 2 is also a modular structure that can be pre-assembled independently. Before the overall relay assembly, the magnetic circuit module 3 can be pre-assembled, thereby improving assembly efficiency. The push module 2 also includes a magnet 24, which is also interlocked and embedded within the main body 21. The magnet 24 is located between the first and second magnetic conductors 22 and 23, with its left and right ends connected to the first and second magnetic conductors 22 and 23, respectively. The main body 21 is provided with a first slot 213, a second slot 215, and a third slot 214 corresponding to the first magnetic conductor 22, the second magnetic conductor 23, and the magnet 24. The first magnetic conductor 22, the second magnetic conductor 23, and the magnet 24 are respectively inserted into the first slot 213, the second slot 215, and the third slot 214. The first slot 213 is located to the left of the second slot 215, and the second slot 215 is located to the right of the first slot 213. The main body 21 has a window 20 on the left side of the first slot 213 and the right side of the second slot 215 to expose the first magnetic conductor 22 and the second magnetic conductor 23 in the first slot 213 and the second slot 215. The main body 21 is also vertically provided with an iron core slot 212 located between the first magnetic conductor 22 and the second magnetic conductor 23. When the push module 2 and the magnetic circuit module 3 are inserted and engaged, the left and right ends of the magnetic drive part 30 are respectively inserted outside the two windows 20, and the front end 331 of the iron core is inserted into the iron core slot 212. Thus, the pole faces at both ends of the magnetic drive unit 30 can be directly aligned with the first magnetic conductor 22 and the second magnetic conductor 23. This arrangement also facilitates the spatial arrangement of the push module 2 and the magnetic circuit module 3, reducing their volume.

[0035] In this embodiment, the magnet 24 is arranged vertically. In other embodiments, the magnet 24 can also be arranged horizontally, as long as the two ends of the magnet 24 are respectively connected to the first magnetic conductor 22 and the second magnetic conductor 23. However, the vertical arrangement of the magnet 24 in this embodiment can effectively reduce the overall volume of the push module 2 and improve the magnetic conductivity.

[0036] In this embodiment, both the push module 2 and the magnetic circuit module 3 are modular structures that can be pre-assembled independently. The magnetic circuit module 3 and the push module 2 are connected by plugging in and out in the vertical direction. When assembling the relay, simply install the magnetic circuit module 3 and the push module 2 downwards onto the base 1 and complete the plugging. This simplifies the installation structure and increases efficiency. Furthermore, the push module 2 and the moving contact 51 are also connected by plugging in and out in the vertical direction, and the contact 5 can also be plugged downwards and fixed to the base 1, which further facilitates automated production.

[0037] like Figure 1 , 3 The base 1 has an upward-opening mounting groove 130, in which the push module 2 and the magnetic circuit module 3 are inserted downwards. The mounting groove 130 facilitates the pre-positioning of the push module 2 and the magnetic circuit module 3. The push module 2 also includes a push arm 211 extending outwards from the side of the main body 21. The wall of the mounting groove 130 has an upward-opening notch 100. The main body 21 is inserted into the mounting groove 130, and the push arm 211 is inserted into the notch 100, so that the push arm 211 protrudes outwards from the mounting groove 130. The contact part 5 is fixedly set on the outside of the mounting groove 130. The push arm 211 has a downward-opening moving spring slot 211A for connecting with the moving contact part 51 of the vertical plate structure. When the push module 2 moves to the left or right, the push arm 211 pushes the moving contact part 51 to move to contact or separate from the stationary contact part 52. In this embodiment, there are two sets of contact portions 5, and two corresponding push arms 211 are also provided on the push module 2, so that the push module 2 can simultaneously push the two sets of contact portions 5 to conduct or disconnect.

[0038] See also Figure 2 , 3 A partition plate 25 is also fixedly connected to the push arm 211. The partition plate 25 covers the outside of the notch 100, further sealing the mounting groove 130 and achieving high electrical insulation between strong and weak currents. At the same time, the partition plate 25 also serves as a limiting baffle, restricting the left and right movement range of the push module 2 by the contact between the partition plate 25 and the groove wall of the mounting groove 130.

[0039] like Figure 2In this embodiment, the push module 2 and the magnetic circuit module 3 together serve as the driving part for driving the moving contact 51. Two opposite directions, simultaneously perpendicular to the aforementioned up-down and left-right directions, are defined as front-back and back-to-back. In this embodiment, the two sets of contact parts 5 are respectively arranged on the left and right sides of the driving part, and the moving contact 511 and stationary contact 521 of the two sets of contact parts 5 extend forward beyond the driving part. The moving contact 511 and stationary contact 521 of the two sets of contact parts 5 are offset from the driving part in the front-back direction, increasing the movement and installation space of the contacts in the left-right direction, thus avoiding problems such as poor heat dissipation and small electrical insulation distance. On the other hand, the left and right ends of the base 1 are recessed inward to form the installation space for the two sets of contact parts 5. That is, the two sets of contact parts 5 are respectively located on the left and right outermost sides of the base 1. The installation spaces of the two sets of contact parts 5 are open, providing a large heat dissipation space, which can effectively reduce the temperature rise of the contacts and pins, reduce the risk of contact adhesion failure, and effectively improve the reliability of the relay operation.

[0040] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. A relay comprising a base, a drive module, a magnetic circuit module, and a contact portion, wherein the contact portion is fixedly mounted on the base, the contact portion includes a stationary contact portion and a moving contact portion for realizing circuit connection or disconnection, the magnetic circuit module is used to provide electromagnetic driving force to drive the drive module, the drive module and the moving contact portion are linked and connected to each other for pushing the moving contact portion relatively closer to or away from the stationary contact portion, characterized in that: The moving contact part is provided with a moving contact, and the stationary contact part is provided with a stationary contact. Both the push module and the magnetic circuit module are modular structures that can be pre-assembled independently. With the base located at the lower part of the relay, the push module and the magnetic circuit module are inserted and assembled downwards onto the base. The push module and the moving contact part are connected in the vertical direction, and the magnetic circuit module and the push module are also connected in the vertical direction. The magnetic circuit module includes a magnetic attraction drive part, which is a semi-enclosed structure with an opening facing downwards. The push module includes a magnetic conductor inserted vertically into the magnetic attraction drive part. The magnetic attraction of the magnetic conductor by the magnetic attraction drive part drives the push module.

2. The relay according to claim 1, characterized in that: The magnetic circuit module includes a coil, a coil frame, an iron core, and a yoke. The coil is wound on the coil frame, the iron core is inserted and fixed to the coil frame, and the yoke is placed on the upper end of the coil frame with the axis of the coil as the front-back direction. The rear end and the front end of the iron core both extend out of the coil frame. The rear end of the yoke is bent downward and inserted into contact with the rear end of the iron core. The front end of the iron core and the front end of the yoke form the magnetic attraction drive part.

3. The relay according to claim 2, characterized in that: The front end of the iron core is a vertical plate-like structure, and the front end of the yoke is a downward-opening "U"-shaped forked structure. The front end of the iron core extends into the front end of the yoke, so that the front end of the iron core and the front end of the yoke form the downward-opening inverted "E"-shaped magnetic attraction drive part.

4. The relay according to claim 3, characterized in that: The pushing module includes a main body, and two magnetic conductors are provided, namely a first magnetic conductor and a second magnetic conductor. Both the first magnetic conductor and the second magnetic conductor are vertical sheet-like structures. The first magnetic conductor and the second magnetic conductor are interposed and embedded in the main body at intervals. The inverted "E"-shaped magnetic attraction drive part has two parallel insertion gaps, and the first magnetic conductor and the second magnetic conductor are respectively inserted into the two insertion gaps.

5. The relay according to claim 4, characterized in that: The main body is provided with a first slot and a second slot respectively corresponding to the first magnetic conductor and the second magnetic conductor. The first slot is located to the left of the second slot, and the second slot is located to the right of the first slot. The main body has a window on the left side of the first slot and a window on the right side of the second slot to expose the first magnetic conductor and the second magnetic conductor inside the first slot and the second slot. When the push module and the magnetic circuit module are plugged in, the left and right ends of the yoke are respectively inserted outside the two windows.

6. The relay according to claim 4, characterized in that: The pushing module also includes a magnet, which is also inserted and embedded in the main body. The magnet is located between the first magnetic conductor and the second magnetic conductor, and its two ends are respectively connected to the first magnetic conductor and the second magnetic conductor.

7. The relay according to claim 4, characterized in that: The main body is also vertically provided with an iron core slot located between the first magnetic conductor and the second magnetic conductor, and the front end of the iron core is inserted into the iron core slot.

8. The relay according to claim 1, characterized in that: The base is provided with an upward-opening mounting slot, and the pushing module and the magnetic circuit module are both inserted into the mounting slot.

9. The relay according to claim 8, characterized in that: The pushing module includes a main body and a pushing arm extending outward from the side of the main body. The wall of the mounting groove has an upward-opening notch. The main body is inserted into the mounting groove, and the pushing arm is inserted into the notch, so that the pushing arm protrudes outward from the mounting groove. The contact portion is fixedly disposed on the outside of the mounting groove and is inserted vertically with the pushing arm.

10. The relay according to claim 9, characterized in that: The push arm is provided with a downward-opening movable spring slot, and the movable contact part is a vertical plate structure. The movable spring slot is inserted downward into the movable contact part.

11. The relay according to claim 9, characterized in that: A partition plate is also fixedly connected to the push arm, and the partition plate covers the outside of the notch.

Images