relay

Abstract

The application discloses a kind of relays, including shell, permanent magnet contactor, and operating handle, permanent magnet contactor includes coil framework, coil, permanent magnet, magnetically conductive core, push rod, magnetically conductive armature piece and magnetically conductive yoke, push rod is connected with operating handle, at least two fixed contacts are provided in shell, including first fixed contact and second fixed contact, the interval of the first fixed contact and second fixed contact is 5-20mm, push rod is equipped with at least two dynamic contacts on the same conductive metal sheet, the interval between the dynamic contact and corresponding fixed contact is 1.2-5mm, when magnetically conductive core translation, at least two fixed contacts and at least two dynamic contacts realize surface contact, and contact when producing sound prompt.The number of fixed contact and dynamic contact is designed as multiple in the application, while increasing the contact area, the opening distance between the contacts is increased, and the withstand voltage value is higher;Through the rigid connection of push rod and connecting rod, in the case of ensuring small size, the advantages of good arc extinguishing effect and high withstand voltage are achieved.

Description

Technical Field

[0001] This invention belongs to the field of electronic components and electrical technology, and in particular relates to a relay. Background Technology

[0002] Currently, all magnetic latching relays on the market are rotary structures. For example, Chinese patent CN104377086 discloses "A Bistable Pulse Relay", in which the rotation of the armature drives the push rod to move. This rotary structure results in a small contact gap and poor arc extinguishing effect.

[0003] For example, Chinese patent CN111192796 discloses a "Magnetic Holding Relay for Small-Volume Smart Home". Its planar moving contact contacts the planar stationary contact under the drive of the moving spring. This rotating structure not only has a small contact spacing, but even if the number of planar stationary contacts and planar moving contacts is increased, it only increases the cross-section of the contacts to achieve the effect of carrying a larger current, but does not increase the contact spacing and has poor arc extinguishing effect. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a relay with small size, good arc extinguishing effect, and high withstand voltage value.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a relay, including a housing, a permanent magnet contactor disposed within the housing, and an operating handle. The permanent magnet contactor includes a coil frame, a coil wound around the coil frame, a permanent magnet, a magnetic core movable relative to the coil frame, a push rod connected to the magnetic core, a magnetic armature plate, and a magnetic yoke. The push rod is connected to the operating handle. The housing is provided with at least two fixed contacts, including a first fixed contact connected to the input end and a second fixed contact connected to the output end. The distance between the first and second fixed contacts is 5-20 mm. The push rod is provided with at least two moving contacts disposed on the same conductive metal plate. The distance between the moving contacts and the corresponding fixed contacts is 1.2-5 mm. When the magnetic core moves, the at least two fixed contacts and the at least two moving contacts achieve surface contact, and an audible prompt is generated when they contact.

[0006] Furthermore, the housing has a first protrusion and a second protrusion parallel to the first protrusion. The operating handle includes a connecting rod and an operating part for applying external force. The operating part has a first groove into which the first protrusion extends, and the push rod has a second groove into which the second protrusion extends. The connecting rod and the push rod are connected in a non-rotating engagement. Alternatively, the housing has a first groove and a second groove parallel to the first groove, the operating part has a first protrusion that can extend into the first groove, and the push rod has a second protrusion that can extend into the second groove. Alternatively, the housing has a first groove and a second protrusion parallel to the first groove, the operating part has a first protrusion that can extend into the first groove, and the push rod has a second groove into which the second protrusion extends. Alternatively, the housing has a first protrusion and a second groove parallel to the first protrusion, the operating part has a first groove into which the first protrusion extends, and the push rod has a second protrusion into the second groove.

[0007] Furthermore, the projection of the first protrusion at least partially falls on the second protrusion; the connection point of the connecting rod and the push rod and the second groove are directly opposite each other; the first protrusion and the second protrusion are horizontal strips, and their extension direction is parallel to the translation direction of the magnetic core.

[0008] Furthermore, the at least two fixed contacts and the at least two moving contacts simultaneously achieve surface contact; the push rod forms a square protrusion, and the end of the connecting rod forms a square groove for the square protrusion to be tightly inserted.

[0009] Furthermore, the moving contacts are distributed on both sides of the push rod, and a spring is connected to the push rod, which pushes the moving contacts against the fixed contacts in the direction of the fixed contacts.

[0010] Furthermore, the housing is provided with a limiting cavity for the permanent magnet contactor to be inserted. The limiting cavity has an opening for the push rod to extend out. The fixed contact is located on the upper and lower sides of the opening. The thickness of the relay is 18mm, and the width of the part where the permanent magnet contactor is located is 45mm.

[0011] Furthermore, the magnetic armature plate and the magnetic yoke are joined together to form a closed ring that covers the outside of the coil frame. The joining direction of the magnetic armature plate and the magnetic yoke is the same as the moving direction of the magnetic core. After being joined together, the magnetic armature plate and the magnetic yoke form two opposing openings, from which the pins connected to the coil extend. The edge of the limiting cavity is provided with a slot for the pins to extend. The two pins extend from below the same opening, and the line connecting the two pins is parallel to the moving direction of the magnetic core.

[0012] Furthermore, the magnetic armature plate is a flat plate structure, the magnetic yoke is a frame structure with a U-shaped cross section, and the cross section of the magnetic armature plate and the magnetic yoke is square after being assembled; notches are formed on both sides of the magnetic armature plate, and a protrusion is formed at the corresponding position of the magnetic yoke that can be vertically inserted into the notch.

[0013] Furthermore, the two pins extend from below the same opening, and the line connecting the two pins is parallel to the direction of movement of the magnetic core.

[0014] Furthermore, the permanent magnets are arranged in pairs on the coil frame and are symmetrically arranged with the magnetic core as the center.

[0015] The beneficial effects of this invention are: 1) By designing multiple fixed contacts and moving contacts, and connecting multiple fixed contacts in series, the contact area is increased while the distance between contacts is increased, resulting in a higher withstand pressure value; 2) Through the rigid connection of the push rod and the connecting rod, the two are anti-rotationally engaged, allowing the operating part to drive the push rod to move horizontally without deflection. In addition, with the horizontal sliding groove between the first protrusion and the first groove, the second protrusion and the second groove, and the connection point of the push rod and the connecting rod facing the second groove, the three points of engagement form a stable quadrilateral engagement structure, achieving the advantages of good arc extinguishing effect and high withstand pressure while ensuring a small volume; 3) The overall structure is simple and effective, and the structure remains stable throughout during operation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the internal structure of the present invention.

[0017] Figure 2 This is a front view of the internal structure of the present invention.

[0018] Figure 3 for Figure 2 AA section view in the image.

[0019] Figure 4 This is a schematic diagram of the cooperative structure of the operating handle, moving contact, fixed contact and push rod of the present invention.

[0020] Figure 5 This is a schematic diagram of the internal exploded structure of the present invention.

[0021] Figure 6 This is a perspective view of the housing of the present invention.

[0022] Figure 7 This is a schematic diagram of the cooperation structure between the permanent magnet contactor of the present invention and the operating handle and push rod. Figure 1 .

[0023] Figure 8 This is a schematic diagram of the cooperation structure between the permanent magnet contactor of the present invention and the operating handle and push rod. Figure 2 .

[0024] Figure 9 This is a schematic diagram of the back of the housing of the present invention.

[0025] Figure 10 This is a side view of the housing of the present invention.

[0026] Figure 11 This is a perspective view of the permanent magnet contactor of the present invention (excluding the magnetic armature plate and the magnetic yoke).

[0027] Figure 12 This is a schematic diagram of the internal structure of the present invention.

[0028] Figure 13 for Figure 12 BB section view in the middle.

[0029] Figure 14 This is a schematic diagram showing the different orientations of the permanent magnet contactor pins of the present invention. Figure 1 .

[0030] Figure 15 This is a schematic diagram showing the different orientations of the permanent magnet contactor pins of the present invention. Figure 2 .

[0031] Figure 16 This is a schematic diagram showing the different orientations of the permanent magnet contactor pins of the present invention. Figure 3 . Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] like Figure 1-3 As shown, a relay includes a housing 4, a permanent magnet contactor disposed in a hollow portion inside the housing 4, and an operating handle 5 connected to the permanent magnet contactor.

[0034] like Figure 11 , 12 As shown, the permanent magnet contactor includes a coil frame 1, a coil 11 wound on the coil frame 1, a pair of permanent magnets 12 arranged on the coil frame 1, a magnetic core 2 inserted into the coil frame 1 and movable relative to the coil frame 1, a push rod 21 connected to one end of the magnetic core 2, a magnetic armature plate 31, and a magnetic yoke 32.

[0035] After the magnetic armature plate 31 and the magnetic yoke 32 are assembled to form a closed loop, they cover the outside of the coil frame 1. The assembly direction of the magnetic armature plate 31 and the magnetic yoke 32 is the same as the moving direction of the magnetic core 2. Moreover, after the magnetic armature plate 31 and the magnetic yoke 32 are assembled, they form two opposing openings 33. The pin 13 connected to the lead end of the coil 11 extends out from the opening 33, rather than extending through the side wall of the magnetic yoke 32.

[0036] Specifically, the magnetic armature plate 31 is a flat plate structure, and the magnetic yoke 32 is a frame structure with a U-shaped cross-section. Thus, the magnetic armature plate 31 and the magnetic yoke 32, when assembled, form a frame structure with the cross-section oriented in the direction of the cross-section. (Definition) Figure 3 The direction shown is the upward view direction, so the magnetic armature plate 31 is placed vertically, and the magnetic core 2 is inserted horizontally into the coil frame 1. In this embodiment, the magnetic core 2 is a flat strip plate structure. At least one pair of permanent magnets 12 are provided on the front and rear sides of the middle position of the coil frame 1. The pair of permanent magnets 12 are symmetrically arranged with the central axis of the magnetic core 2 as the center. A groove 14 is formed on the coil frame 1 for the permanent magnets 12 to be tightly inserted.

[0037] To ensure the stability of the assembled structure of the magnetic armature plate 31 and the magnetic yoke 32, notches 311 are formed on both sides of the magnetic armature plate 31, and protrusions 321 that can be vertically inserted into the notches 311 are formed at the corresponding positions of the magnetic yoke 32. The thickness of the protrusions 321 is equivalent to the depth of the notches 311.

[0038] In this embodiment, the cross-section of the magnetic yoke 32 is U-shaped, so that after the magnetic armature plate 31 and the magnetic yoke 32 are assembled, openings 33 are formed on the upper and lower sides facing each other. Two pins 13 connected to the two ends of the coil extend from the bottom of the same opening 33, and the line connecting the two pins 13 is parallel to the moving direction of the magnetic core 2.

[0039] Of course, in other embodiments, the two pins 13 may also extend from above the upper opening, or one pin 13 may extend from the upper opening and the other pin 13 may extend from the lower opening.

[0040] In order for the pins 13 to extend from the lateral side of the same opening, one of the pins has a bend 131, which is L-shaped and parallel to the plane of the opening 33. One end of the bend is bent vertically to form the pin 13, and the other end is wound and connected to the lead end of the coil.

[0041] The housing 4 is provided with a limiting cavity 41 for the permanent magnet contactor to be inserted. The size of the limiting cavity 41 is approximately the same as the size of the permanent magnet contactor. It is formed by four side walls. A slot 412 for the pin 13 to extend is provided on the bottom side wall edge of the limiting cavity 41. Figure 2 As shown, pin 13 extends vertically downward from the bottom sidewall.

[0042] The assembly direction of the limiting cavity 41 and the permanent magnet contactor can also be changed as needed. The pin 13 can extend not only from the bottom of the limiting cavity 41, but also from the left side, the right side, or the top of the limiting cavity 41; of course, as... Figure 14-16 As shown, pin 13 is located at the upper right of coil frame 1, or at the lower right of coil frame 1, or at the upper left of coil frame 1, which increases the flexibility of assembly.

[0043] The working process is as follows: when the two pins 31 of the connecting coil 11 are energized, the paired permanent magnets 12 magnetize the magnetic armature plate 31 and the magnetic yoke 32. According to the principle that like poles repel and unlike poles attract, the magnetic core 2 moves horizontally relative to the coil frame 1 under the action of the magnetic armature plate 31 and the magnetic yoke 32. By changing the direction of the current in the coil 11, the purpose of translational extension or retraction is achieved. Since there is no opening on the magnetic yoke 32 for the pins 13 to extend, the magnetic circuit balance is high, ensuring that the two contact ends connected to the push rod 21 have high synchronicity during the extension or retraction of the magnetic core 2.

[0044] like Figure 4-13 As shown, the push rod 21 is connected to the operating handle 5. Inside the housing 4, at least two series-connected fixed contacts 42 are provided on the upper and lower sides of the opening 411 in the limiting cavity 41 for the push rod 21 to extend. These include a first fixed contact 421 connected to the output end 432 and a second fixed contact 422 connected to the input end 431. In this embodiment, there are two fixed contacts 42, namely the first fixed contact 421 and the second fixed contact 422. The interval between the first fixed contact 421 and the second fixed contact 422 is 5-20mm. This interval is the vertical distance from the center of the first fixed contact 421 to the center of the second fixed contact 422. If multiple fixed contacts 42 are to be provided, then, while ensuring this interval, additional fixed contacts are provided below the first fixed contact 421 and above the second fixed contact 422.

[0045] The push rod 21 is provided with at least two moving contacts 211, which are disposed on the same conductive metal sheet 210. The moving contacts 211 and the fixed contacts 42 are positioned correspondingly, that is, the moving contacts 211 are distributed on the upper and lower sides of the push rod 21. In order to ensure effective contact between the moving contacts 211 and the fixed contacts 42, a spring piece 212 is connected to the push rod 21. The spring piece 212 abuts the moving contacts 211 in the direction of the fixed contacts 42. Specifically, the spring piece 212 includes a body 213 that passes vertically through the push rod 21, and an upper spring piece 214 and a lower spring piece 215 that extend to both sides of the body 213 respectively. The upper spring piece 214 is further forked into two elastic legs 216, and the two elastic legs 216 symmetrically abut against both sides of the moving contacts 211.

[0046] When the magnetic core 2 is translated, the at least two fixed contacts 42 and the at least two moving contacts 211 simultaneously achieve surface contact. That is, all moving contacts 211 translate and contact the fixed contacts 42 as synchronously as possible. At the same time that the moving contacts 211 and the fixed contacts 42 are in contact, a clear sound prompt will be generated, which serves as an intuitive prompt to the user.

[0047] To ensure synchronous contact of all moving contacts 211 and all fixed contacts 42, such as Figure 5 , 6 As shown, a first protrusion 61 and a second protrusion 62 are provided in the housing 4, which are parallel to the first protrusion 61; the operating handle 5 includes a connecting rod 51 and an operating part 52 for applying external force. The connecting rod 51 and the push rod 21 are connected in a non-rotating engagement. The operating part 52 is provided with a first groove 63 into which the first protrusion 61 extends, and the push rod 21 is provided with a second groove 64 into which the second protrusion 62 extends.

[0048] The first protrusion 61 and the second protrusion 62 are both horizontal strips, and their number is not limited. Moreover, their extension direction is parallel to the translation direction of the magnetic core 2. The projection of the first protrusion 61 at least partially falls on the second protrusion 62, that is, the projections of the first protrusion 61 and the second protrusion 62 in the vertical direction at least partially overlap. Furthermore, the connection point of the connecting rod 51 and the push rod 21 and the second groove 64 located on the back of the push rod 21 are directly opposite each other.

[0049] Of course, the positions of the first protrusion 61, the second protrusion 62, the first groove 63, and the second groove 64 can also be interchanged. For example, a first groove and a second groove parallel to the first groove can be provided on the housing 4, a first protrusion that can extend into the first groove can be provided on the operating part 52, and a second protrusion that can extend into the second groove can be provided on the push rod 21; or, a first groove and a second protrusion parallel to the first groove can be provided on the housing 4, a first protrusion that can extend into the first groove can be provided on the operating part 52, and a second groove for the second protrusion to extend into can be provided on the push rod 21; or, a first protrusion and a second groove parallel to the first protrusion can be provided on the housing 4, a first groove for the first protrusion to extend into can be provided on the operating part 52, and a second protrusion that can extend into the second groove can be provided on the push rod 21.

[0050] To achieve a non-rotational connection between the connecting rod 51 and the push rod 21, a square protrusion 217 is formed on the front of the push rod 21, and a square groove 511 is formed at the lower end of the connecting rod 51 for the square protrusion 217 to be tightly inserted. Of course, the protrusion can also be triangular or non-circular irregular structures, as long as it can achieve a rigid connection and a non-rotational connection.

[0051] Thus, the rigid connection between the connecting rod 51 and the push rod 21, the cooperation between the first protrusion 61 and the first groove 63, and the cooperation between the second protrusion 62 and the second groove 64 ensure that when an external force is applied to the operating part 52, the push rod 21 can be driven to move horizontally, i.e., perform linear motion, so that multiple moving contacts 211 and fixed contacts 42 simultaneously achieve surface contact. With the vertical distance between the center points of the first fixed contact 421 and the second fixed contact 422 maintained at 5-20mm, preferably 11.3mm; simultaneously, the contact distance between the first fixed contact 421 and its cooperating moving contact 211 reaches 1.2-5mm. The relay of this invention has a withstand voltage exceeding 3500V, good arc extinguishing effect, and small size. Figure 9 , 10 As shown, the thickness is approximately 18mm, that is... Figure 10 The width of the section containing the permanent magnet contactor is approximately 45mm, with S being 18mm. Figure 9 The middle L is 45mm.

[0052] The above specific embodiments are used to explain and illustrate the present invention, but not to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A relay comprising a housing (4), a permanent magnet contactor disposed within the housing (4), and an operating handle (5), wherein the permanent magnet contactor comprises a coil frame (1), a coil (11) wound around the coil frame (1), a permanent magnet (12), a magnetic core (2) movable relative to the coil frame (1), a push rod (21) connected to the magnetic core (2), a magnetic armature plate (31), and a magnetic yoke (32), characterized in that: The push rod (21) is connected to the operating handle (5). The housing (4) contains at least two fixed contacts (42), including a first fixed contact (421) connected to the input end (431) and a second fixed contact (422) connected to the output end (432). The distance between the first fixed contact (421) and the second fixed contact (422) is 5-20 mm. The push rod (21) has at least two moving contacts (211) located on the same conductive metal sheet (210). The distance between the moving contact (211) and the corresponding fixed contact (42) is 1.2-5 mm. When the magnetic core (2) is translated, the at least two fixed contacts (42) and the at least two moving contacts (211) achieve surface contact. An audible prompt is generated upon contact; the housing (4) is provided with a first protrusion (61) and a second protrusion (62) arranged parallel to the first protrusion (61); the operating handle (5) includes a connecting rod (51) and an operating part (52) for applying external force; the operating part (52) is provided with a first groove (63) into which the first protrusion (61) extends; the push rod (21) is provided with a second groove (64) into which the second protrusion (62) extends; the connecting rod (51) and the push rod (21) are connected in a non-rotational engagement; or, the housing (4) is provided with a first groove and a second groove arranged parallel to the first groove; the operating part is provided with a first protrusion that can extend into the first groove; the push rod is provided with a second protrusion that can extend into the second groove. Alternatively, the housing may have a first groove and a second protrusion parallel to the first groove, the operating part may have a first protrusion that can extend into the first groove, and the push rod may have a second groove into which the second protrusion extends; or, the housing may have a first protrusion and a second groove parallel to the first protrusion, the operating part may have a first groove into which the first protrusion extends, and the push rod may have a second protrusion that can extend into the second groove.

2. The relay according to claim 1, characterized in that: The projection of the first protrusion (61) falls at least partially on the second protrusion (62); the connection point of the connecting rod (51) and the push rod (21) and the second groove (64) are directly opposite each other; the first protrusion (61) and the second protrusion (62) are horizontal strips and their extension direction is parallel to the translation direction of the magnetic core (2).

3. The relay according to claim 1, characterized in that: The at least two fixed contacts (42) and at least two moving contacts (211) simultaneously achieve surface contact; the push rod (21) forms a square protrusion (217), and the end of the connecting rod (51) forms a square groove (511) for the square protrusion (217) to be tightly inserted.

4. The relay according to claim 1, characterized in that: The moving contact (211) is distributed on both sides of the push rod (21), and a spring piece (212) is connected to the push rod (21). The spring piece (212) pushes the moving contact (211) against the fixed contact (42) in the direction of the fixed contact (42).

5. The relay according to claim 1, characterized in that: The housing (4) is provided with a limiting cavity (41) for the permanent magnet contactor to be inserted. The limiting cavity (41) has an opening (411) for the push rod (21) to extend out. The fixed contact (42) is located on the upper and lower sides of the opening (411). The thickness of the relay is 18mm and the width of the part where the permanent magnet contactor is located is 45mm.

6. The relay according to claim 5, characterized in that: The magnetic armature plate (31) and the magnetic yoke (32) are joined together to form a closed ring that covers the outside of the coil frame (1). The joining direction of the magnetic armature plate (31) and the magnetic yoke (32) is the same as the moving direction of the magnetic core (2). After the magnetic armature plate (31) and the magnetic yoke (32) are joined together, they form two openings (33) facing each other. The pins (13) connected to the coil (11) extend out from the openings (33). The edge of the limiting cavity (41) is provided with a slot (412) for the pins (13) to extend out. The two pins (13) extend out from below the same opening (33), and the line connecting the two pins (13) is parallel to the moving direction of the magnetic core (2).

7. The relay according to claim 6, characterized in that: The magnetic armature plate (31) is a flat plate structure, and the magnetic yoke (32) is a frame structure with a U-shaped cross section. The cross section of the magnetic armature plate (31) and the magnetic yoke (32) is square after being assembled. The magnetic armature plate (31) has notches (311) on both sides, and the magnetic yoke (32) has a protrusion (321) that can be vertically inserted into the notches (311) at the corresponding position.

8. The relay according to claim 6, characterized in that: The two pins (13) extend from below the same opening (33), and the line connecting the two pins (13) is parallel to the direction of movement of the magnetic core (2).

9. The relay according to claim 6, characterized in that: The permanent magnets (12) are arranged in pairs on the coil frame (1) and are symmetrically arranged with the magnetic core (2) as the center.

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