Relay

Abstract

To provide a relay capable of effectively reducing a temperature rise.SOLUTION: The relay includes a contact part 20 and a push rod assembly 40. The contact part comprises two sets of movable contact parts. The movable contact parts include a movable contact piece 210, a movable contact unit 220, a static contact unit 230, and a movable contact leading-out piece 240. The movable contact leading-out piece is connected with the movable contact piece; the movable contact unit is arranged on the movable contact piece; and the static contact unit is arranged on the movable contact piece and the movable contact leading-out piece. The two movable contact leading-out pieces are provided with an avoidance notch; the static contact unit of the movable contact part having the avoidance notch comprises two static contacts; the movable contact unit corresponding to the static contact unit comprises two movable contacts; a first push rod is movably arranged to pass through the avoidance notch of the movable contact leading-out piece of one of the movable contact pars; and the first push rod is connected with the movable contact piece of the other movable contact part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the technical field of electronic control elements, and particularly to relays.

Background Art

[0002] A relay is an electronic control element that has a control system (also called an input circuit) and a controlled system (also called an output circuit), and is usually applied to an automatic control circuit. A relay is actually an "automatic switch" that controls a large current with a small current. Therefore, it plays roles such as automatic adjustment, safety protection, and conversion circuit in a circuit.

[0003] With the expansion of the application range of relays, relays are also developing in the direction of high load and miniaturization. However, the problem of temperature rise of relays in the prior art has not been fully solved. Due to the temperature rise of the relay exceeding the requirement, the accelerated deterioration of the plastic and insulating materials inside the relay, the contact is oxidized and corroded, making it difficult to extinguish the arc, and problems such as the attenuation of the technical parameters of the electrical element and the reduction of reliability are likely to occur.

Summary of the Invention

[0004] Embodiments of the present invention provide a relay that can effectively reduce the temperature rise of the relay by improving the structure.

[0005] The relay according to an embodiment of the present invention includes a contact portion and a push rod assembly. The contact portion includes two sets of movable contact portions. Each set of the movable contact portions includes a movable contact piece, a movable contact unit, a fixed contact unit, and a movable contact lead-out piece. The movable contact lead-out piece is connected to the movable contact piece. The movable contact unit is provided on the movable contact piece. The fixed contact unit is provided on at least one of the movable contact piece and the movable contact lead-out piece. The two movable contact units respectively correspond to the two fixed contact units. At least one of the two movable contact lead-out pieces is provided with a relief opening. The fixed contact unit in the movable contact portion provided with the relief opening includes at least two fixed contacts. The movable contact unit corresponding to the fixed contact unit includes at least two movable contacts. The at least two fixed contacts correspond to the at least two movable contacts. The push rod assembly includes a first push rod and a second push rod. The first push rod is movably inserted into the relief opening of the movable contact lead-out piece of one of the movable contact portions, and the first push rod is connected to the movable contact piece of the other movable contact portion. The second push rod is connected to the movable contact piece of one of the movable contact portions.

[0006] According to some embodiments of the present invention, in each set of the movable contact portions, the fixed contact unit is provided at the connection position between the movable contact piece and the movable contact lead-out piece.

[0007] According to some embodiments of the present invention, in each set of the movable contact portions, the movable contact piece has a first end and a second end along the length direction. The movable contact unit is provided at the first end. The fixed contact unit is provided at the connection position between the second end of the movable contact piece and the movable contact lead-out piece. The first end of one of the movable contact pieces corresponds to the second end of the other movable contact piece.

[0008] According to some embodiments of the present invention, one of the two movable contact lead pieces is provided with the escape opening, and the fixed contact unit in the movable contact portion where the escape opening is not provided includes one or two fixed contacts, and the movable contact unit corresponding to the fixed contact unit includes one or two movable contacts.

[0009] According to some embodiments of the present invention, the relay further includes a base, the base has an accommodation space, and an opening communicating with the outside of the base is provided in the accommodation space. The contact portion is provided in the accommodation space, the movable contact lead piece extends along the thickness direction of the base, and a part of the movable contact lead piece protrudes from the opening of the base, and the thickness direction is perpendicular to the moving direction of the first push rod.

[0010] According to some embodiments of the present invention, the relay further includes a magnetic circuit portion, and the magnetic circuit portion is drivingly connected to the first push rod and the second push rod. There are two contact portions, and the two contact portions are respectively provided on opposite sides of the magnetic circuit portion. One end of the first push rod and the second push rod is respectively connected to the two movable contact pieces of one of the contact portions, and the other ends of the first push rod and the second push rod are respectively connected to the two movable contact pieces of the other contact portion.

[0011] According to some embodiments of the present invention, in each of the contact portions, one of the two movable contact lead pieces is provided with the escape opening. The first push rod is movably bored through the escape opening of one of the contact portions, and the second push rod is movably bored through the escape opening of the other contact portion.

[0012] According to some embodiments of the present invention, the relay further includes a base, the base has an intermediate region, a first contact region, and a second contact region, the intermediate region is provided between the first contact region and the second contact region, and the first contact region and the second contact region are arranged at intervals along a first direction. The two contact portions are respectively provided in the first contact region and the second contact region, and the magnetic circuit portion is provided in the intermediate region.

[0013] According to some embodiments of the present invention, the base includes a first partition plate provided between the first contact region and the intermediate region, and a second partition plate provided between the second contact region and the intermediate region.

[0014] According to some embodiments of the present invention, the base further has a first moving region and a second moving region arranged at intervals along a second direction, the intermediate region is located between the first moving region and the second moving region, and the second direction is perpendicular to the first direction. The first push rod is movably provided in the first moving region, and the second push rod is movably provided in the second moving region.

[0015] According to some embodiments of the present invention, the first contact region, the first moving region, the second contact region, and the second moving region are connected end to end in sequence to form a square-shaped structure.

[0016] According to some embodiments of the present invention, in the two contact portions, four sets of the movable contact units and the fixed contact units are respectively located at the four corners of the square-shaped structure.

[0017] According to some embodiments of the present invention, the base further includes a third partition plate provided between the first moving region and the intermediate region, and a fourth partition plate provided between the second moving region and the intermediate region.

[0018] One embodiment of the above invention has at least the following advantages or beneficial effects.

[0019] In the relay according to the embodiment of the present invention, at least one of the two movable contact terminal leads at the contact portion is provided with a relief opening, and a first push rod can be movably drilled through the relief opening to play a role of retracting. At the same time, the fixed contact unit in the movable contact part provided with the relief opening includes at least two fixed contacts, the movable contact unit corresponding to the fixed contact unit includes at least two movable contacts, and at least two fixed contacts correspond to at least two movable contacts. Therefore, the contacts near the movable contact terminal lead provided with the relief opening form a multi-contact parallel structure, which is beneficial to reducing the temperature rise. Therefore, the relay according to the embodiment of the present invention adopts a combination of a relief opening + multi-contacts, can realize the retraction of the push rod assembly by the movable contact terminal lead, and can also improve the excessive local temperature rise of the relay caused by the excessive cross-sectional area current carrying due to the provision of the relief opening in the movable contact terminal lead, and guarantee the performance of the product.

[0020] In addition, the movable contact terminal lead extends along the thickness direction of the base toward the opening of the base and protrudes from the opening of the base. Thereby, the dimension of the movable contact terminal lead in the thickness direction becomes larger, compensating for the problem that the current carrying per unit cross-sectional area is too high due to the provision of the relief opening and improving the problem of excessive temperature rise. Also, since the two movable contact pieces in one contact portion are arranged in parallel, the two movable contact terminal leads connected to the two movable contact pieces can directly extend along the thickness direction toward the opening of the base without bending the movable contact terminal leads, saving the material of the movable contact terminal leads.

[0021] Furthermore, the movable contact terminal lead projects from the opening and is connected to the lead pin, eliminating the need to form a slot in the base for accommodating the movable contact terminal lead. On the other hand, the structural strength of the base is ensured, the deformation resistance ability of the base is improved, the dimensional accuracy of the base is guaranteed with small error. On the other hand, when the contact part and the magnetic circuit part are mounted in the base, the assembly parameters have good consistency, the electromechanical parameters are guaranteed, the reliability of the product is improved, and the service life is extended.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0023] Next, with reference to the drawings, exemplary embodiments will be described in more detail. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided so that the present invention is comprehensive and complete, and can fully convey the concept of the exemplary embodiments to those skilled in the art. Since the same reference numerals in the figures represent the same or similar structures, detailed descriptions thereof will be omitted.

[0024] As shown in FIGS. 1 to 3, the relay according to an embodiment of the present invention includes a base 10, a pair of contact portions 20, a magnetic circuit portion 30, and a push rod assembly 40. The pair of contact portions 20 and the magnetic circuit portion 30 are provided on the base 10, and the magnetic circuit portion 30 drives the contacts of the pair of contact portions 20 through the push rod assembly 40 to be in contact or separated.

[0025] It should be understood that the terms "comprising" and "having" in the embodiments of the present invention, and any variations thereof, are intended to include non-exclusive inclusion. For example, a process, method, system, product, or device including a series of steps or units is not limited to the listed steps or units, and may also include steps or units not listed as options, or other steps or assemblies specific to such a process, method, product, or device.

[0026] In other embodiments, the contact portion 20 may be only one, and the contact portion 20 is disposed on one side of the magnetic circuit portion 30, and the magnetic circuit portion 30 drives the contacts of the contact portion 20 through the push rod assembly 40 to be in contact or separated.

[0027] The base 10 can include a bottom plate 101 and side walls 102. The side walls 102 are connected to the periphery of the bottom plate 101. The side walls 102 and the bottom plate 101 enclose a receiving space 170 for accommodating a pair of contact portions 20, a magnetic circuit portion 30, and a push rod assembly 40. An opening 180 communicating with the outside of the base 10 is provided in the receiving space 170. The base 10 is configured to be connected to an upper lid (not shown), and the upper lid closes the opening 180.

[0028] In one embodiment, the base 10 can have a substantially cubic shape, but is not limited thereto.

[0029] The interior of the base 10 has an intermediate region 110, a first contact region 120, and a second contact region 130. The intermediate region 110 is provided between the first contact region 120 and the second contact region 130. The first contact region 120 and the second contact region 130 are spaced apart along a first direction D1.

[0030] A pair of contact portions 20 are respectively provided in the first contact region 120 and the second contact region 130. That is, the two contact portions 20 are spaced apart along the first direction D1 on the base 10.

[0031] Each contact portion 20 includes two sets of movable contact sub - portions 20a. Each set of movable contact sub - portions 20a includes a movable contact piece 210, a movable contact unit 220, and a fixed contact unit 230. The movable contact piece 210 has a first end 210a and a second end 210b that are oppositely arranged in a second direction D2. A movable contact unit 220 is provided at the first end 210a, and a fixed contact unit 230 is provided at the second end 210b. The two movable contact units 220 of each contact portion 20 respectively correspond to the two fixed contact units 230. Here, the second direction D2 is perpendicular to the first direction D1.

[0032] The magnetic circuit portion 30 is provided in the intermediate region 110 of the base 10, drives the movement of the four movable contact pieces 210 of the pair of contact portions 20 via the push rod assembly 40, and realizes the contact or separation between the movable contact unit 220 and the fixed contact unit 230.

[0033] The relay according to the embodiment of the present invention includes a pair of contact portions 20, and since each contact portion 20 can control one circuit, it is understood that the relay according to the embodiment of the present invention can control at least two circuits. The two contact portions 20 are arranged at intervals along the first direction D1 on the base 10.

[0034] Each contact portion 20 includes two sets of movable contact portions 20a. The structural designs of each set of movable contact portions 20a are substantially the same. The two sets of movable contact portions 20a are substantially parallel to each other and both include movable contact pieces 210, a movable contact unit 220, and a fixed contact unit 230.

[0035] The two sets of movable contact parts 20a are arranged to face each other in the second direction D2. Specifically, as shown in FIGS. 1 and 3, the contact part 20 located in the first contact area 120 will be taken as an example for explanation. The two movable contact pieces 210 in the two sets of movable contact parts 20a are substantially parallel. The position of the first end 210a of one movable contact piece 210 corresponds to the position of the second end 210b of the other movable contact piece 210, and the position of the second end 210b of one movable contact piece 210 corresponds to the position of the first end 210a of the other movable contact piece 210. The movable contact unit 220 is provided at the first end 210a of the movable contact piece 210, and the fixed contact unit 230 is provided at the second end 210b of the movable contact piece 210. Therefore, the movable contact unit 220 in one set of movable contact parts 20a corresponds to the fixed contact unit 230 in another set of movable contact parts 20a, and the fixed contact unit 230 of one set of movable contact parts 20a corresponds to the movable contact unit 220 in another set of movable contact parts 20a. Therefore, when the magnetic circuit part 30 drives the movable contact piece 210 to move through the push rod assembly 40, the two pairs of movable contact units 220 and the fixed contact units 230 in one set of movable contact parts 20a come into contact to form a parallel circuit structure.

[0036] During the operation of the relay, since the movable contact piece 210 is an operating part and at the same time a current carrier, it can be understood that the movable contact piece 210 is a part that is likely to have a temperature rise during the relay operation.

[0037] In the relay according to an embodiment of the present invention, the two contact portions 20 are arranged at intervals in the first direction D1. In each contact portion 20, two sets of movable contact units 220 and fixed contact units 230 are arranged at intervals in the second direction D2. Overall, the two contact portions 20 are located in the first contact region 120 and the second contact region 130 of the base 10, respectively, and are separated by the magnetic circuit portion 30 located in the intermediate region 110 of the base 10. Therefore, the influence of the heat radiation generated from one contact portion 20 on the other contact portion 20 is effectively reduced. Further, when looking at the contact portion 20 alone, the two sets of movable contact units 220 and fixed contact units 230 in each contact portion 20 are arranged at intervals along the second direction D2. The movable contact unit 220 is provided at the first end 210a of the movable contact piece 210, and the fixed contact unit 230 is provided at the second end 210b of the movable contact piece 210. Therefore, also in the second direction D2, the distance between the two sets of movable contact units 220 and fixed contact units 230 in each contact portion 20 is maximized as much as possible, and the influence of the heat radiation generated from one set of movable contact units 220 and fixed contact units 230 on the other set of movable contact units 220 and fixed contact units 230 is reduced. In summary, due to the structural design in which the two contact portions 20 are arranged at intervals in the first direction D1, and the two sets of movable contact units 220 and static contact portions 230 in each contact portion 20 are arranged in the second direction D2, the temperature rise of the entire relay is effectively reduced, and the reliability and service life of the relay operation are improved.

[0038] Continuing to refer to FIGS. 1 to 3, each set of movable contact portions 20a further includes a movable contact lead-out piece 240, and the movable contact lead-out piece 240 is connected to the movable contact piece 210. In each set of movable contact portions 20a, the fixed contact unit 230 is provided at the connection location between the second end 210b of the movable contact piece 210 and the movable contact lead-out piece 240.

[0039] In other embodiments, in each set of movable contact portions 20a, the fixed contact unit 230 may be provided on the movable contact lead piece 240, or the fixed contact unit 230 may be provided on the movable contact piece 210 and be provided adjacent to the movable contact lead piece 240.

[0040] The length of the movable contact piece 210 extends along the second direction D2. Then, the first end 210a and the second end 210b of the movable contact piece 210 are arranged to face each other in the length direction of the movable contact piece 210. Therefore, the separation distance between the movable contact unit 220 and the fixed contact unit 230 provided on the movable contact piece 210 can be made as large as possible, reducing the influence of heat radiation between the two sets of movable contact units 220 and fixed contact units 230.

[0041] Continuing to refer to FIGS. 1 and 2, the base 10 includes a first partition plate 161 and a second partition plate 162. The first partition plate 161 is connected to the bottom plate 101 and is disposed between the first contact region 120 and the intermediate region 110. The second partition plate 162 is connected to the bottom plate 101 and is disposed between the second contact region 130 and the intermediate region 110. Due to the design of the first partition plate 161 and the second partition plate 162, the first partition plate 161 separates one contact portion 20 from the magnetic circuit portion 30, and the second partition plate 162 separates the other contact portion 20 from the magnetic circuit portion 30. Thereby, the heat radiation generated from one contact portion 20 is shielded by the first partition plate 161, and the heat radiation generated from the other contact portion 20 is shielded by the second partition plate 162, avoiding the mutual influence of the heat radiation generated from the two contact portions 20.

[0042] Continuing to refer to FIGS. 1 and 2, the base 10 further includes a first moving region 140 and a second moving region 150 that are spaced apart along the second direction D2, and the intermediate region 110 is located between the first moving region 140 and the second moving region 150.

[0043] The push rod assembly 40 includes a first push rod 410 and a second push rod 420. The magnetic circuit portion 30 is drivingly connected to the first push rod 410 and the second push rod 420 respectively, such that the first push rod 410 is movably provided in the first movement region 140, and the second push rod 420 is movably provided in the second movement region 150.

[0044] As shown in FIG. 3, one end of the first push rod 410 is connected to the first end 210a of one movable contact piece 210 of the contact portion 20 located in the first contact region 120, and the other end of the first push rod 410 is connected to the first end 210a of one movable contact piece 210 of the contact portion 20 located in the second contact region 130. One end of the second push rod 420 is connected to the first end 210a of the other movable contact piece 210 of the contact portion 20 located in the first contact region 120, and the other end of the second push rod 420 is connected to the first end 210a of the other movable contact piece 210 of the contact portion 20 located in the second contact region 130.

[0045] In this embodiment, the push rod assembly 40 adopts a double push rod structure of the first push rod 410 and the second push rod 420, and realizes the contact or separation of the contacts by the push and pull of the double push rod structure.

[0046] Specifically, the moving directions of the first push rod 410 and the second push rod 420 are opposite. When the first push rod 410 moves downward, the second push rod 420 moves upward. When the first push rod 410 moves downward, the two movable contact pieces 210 connected to the first push rod 410 swing downward around their respective second ends 210b. When the second push rod 420 moves upward, the two movable contact pieces 210 connected to the second push rod 420 swing upward around their respective second ends 210b. In one contact portion 20, the swinging directions of the two movable contact pieces 210 are opposite and they move away from each other, thereby realizing the separation between the movable contact unit 220 and the fixed contact unit 230.

[0047] Conversely, when the first push rod 410 moves upward, the second push rod 420 moves downward. The two movable contact pieces 210 connected to the first push rod 410 swing upward about their respective second ends 210b, and the two movable contact pieces 210 connected to the second push rod 420 swing downward about their respective second ends 210b. In one contact portion 20, the swinging directions of the two movable contact pieces 210 are opposite and they approach each other, thereby realizing the contact between the movable contact unit 220 and the fixed contact unit 230.

[0048] The base 10 further includes a third partition plate 163 and a fourth partition plate 164. The third partition plate 163 is connected to the bottom plate 101 and is disposed between the first moving region 140 and the intermediate region 110. The fourth partition plate 164 is connected to the bottom plate 101 and is disposed between the second moving region 150 and the intermediate region 110.

[0049] As shown in FIGS. 1 and 2, the first contact region 120, the first moving region 140, the second contact region 130, and the second moving region 150 are connected end to end in sequence to form a rectangular frame structure. The magnetic circuit portion 30 is provided within the rectangular frame structure, the two contact portions 20 are respectively located on two opposite sides of the rectangular frame structure, and the first push rod 410 and the second push rod 420 are respectively located on the other two opposite sides of the rectangular frame structure.

[0050] In a pair of contact portions 20, four sets of movable contact units 220 and fixed contact units 230 are respectively located at the four corners of the rectangular frame structure. In this way, by arranging the four sets of movable contact units 220 and fixed contact units 230 at the four corners of the rectangular frame structure respectively, the distance between each set of movable contact unit 220 and fixed contact unit 230 is increased, and the influence of heat radiation between two adjacent sets of movable contact units 220 and fixed contact units 230 is effectively reduced.

[0051] As shown in FIG. 4, the magnetic circuit portion 30 includes a coil assembly 310 and an armature assembly 320. The armature assembly 320 is driven by the magnetic force of the coil assembly 310 and is connected to the base 10 so as to be swingable. The armature assembly 320 includes a permanent magnet 321, an armature 322, and a swing arm 323. The number of armatures 322 is two, and the permanent magnet 321 is sandwiched between the two armatures 322. The swing arm 323 can be formed of an insulating material such as plastic, and the permanent magnet 321, the armature 322, and the swing arm 323 can be connected as an integral part by integral injection molding. Both ends of the swing arm 323 are respectively connected to a first push rod 410 and a second push rod 420.

[0052] By changing the magnetic field direction of the coil assembly 310, the armature assembly 320 is driven to swing with respect to the base 10, and the swing arm 323 of the armature assembly 320 drives the first push rod 410 and the second push rod 420 to reciprocate along the first direction D1, thereby realizing the separation or contact between the movable contact unit 220 and the fixed contact unit 230.

[0053] As shown in FIGS. 5 and 6, at least one of the two movable contact lead-out pieces 240 in one contact portion 20 is provided with a relief opening 241. The fixed contact unit 230 in the movable contact portion 20a provided with the relief opening 241 includes at least two fixed contacts 231. The movable contact unit 220 corresponding to the fixed contact unit 230 includes at least two movable contacts 221. The at least two fixed contacts 231 correspond to the at least two movable contacts 221. The first push rod 410 is movably formed through the relief opening 241 of the movable contact lead-out piece 240 of one movable contact portion 20a, and the first push rod 410 is connected to the movable contact piece 210 of the other movable contact portion 20a. The second push rod 420 is connected to the movable contact piece 210 of one movable contact portion 20a.

[0054] The relay according to an embodiment of the present invention adopts a double push rod structure of a first push rod 410 and a second push rod 420. When assembling the contact portion 20 with the first push rod 410 and the second push rod 420, in order to miniaturize the relay, at least one movable contact lead piece 240 in the contact portion 20 needs to be retracted. That is, it is necessary to provide a relief opening 241 in the movable contact lead piece 240, and the relief opening 241 enables the first push rod 410 to be movably drilled. In this way, the relay has a more compact structure in the second direction D2, and the volume of the relay is not increased.

[0055] Furthermore, since the relief opening 241 is provided in the movable contact lead piece 240, the cross-sectional area current carrying at the location where the relief opening 241 is provided in the movable contact lead piece 240 becomes high, which is not helpful for suppressing the temperature rise.

[0056] In the relay according to an embodiment of the present invention, at least one of the two movable contact lead pieces 240 in one contact portion 20 is provided with a relief opening 241, and the relief opening 241 enables the first push rod 410 to be movably drilled and serves as a retraction function. At the same time, the fixed contact unit 230 in the movable contact portion 20a provided with the relief opening 241 includes at least two fixed contacts 231, and the movable contact unit 220 corresponding to the fixed contact unit 230 includes at least two movable contacts 221. Since at least two fixed contacts 231 correspond to at least two movable contacts 221, the contacts near the movable contact lead piece 240 provided with the relief opening 241 form a multi-contact parallel structure, which is advantageous for reducing the temperature rise. Therefore, the relay according to an embodiment of the present invention adopts a combination of a relief opening 241 + multi-contacts, can realize the retraction of the push rod assembly by the movable contact lead piece 240, and can also improve the excessive local temperature rise caused by the excessive cross-sectional area current carrying due to the provision of the relief opening 241 in the movable contact lead piece 240, and can guarantee the performance of the product.

[0057] Continuing to refer to FIGS. 5 and 6, in an embodiment of the present invention, in one contact portion 20, a relief opening 241 is provided in the movable contact lead piece 240 of the movable contact portion 20a located inside, and the movable contact lead piece 240 of the movable contact portion 20a located outside is not provided with a relief opening 241. Here, the movable contact portion 20a close to the magnetic circuit portion 30 is defined as the inner movable contact portion 20a, and the movable contact portion 20a far from the magnetic circuit portion 30 is defined as the outer movable contact portion 20a. Hereinafter, for convenience of explanation, the two movable contact portions 20a of the contact portion 20 are respectively referred to as the inner movable contact portion 20a and the outer movable contact portion 20a.

[0058] When there are two contact portions 20, relief openings 241 are provided in both of the movable contact lead pieces 240 of the two inner movable contact portions 20a, and relief openings 241 are not provided in both of the movable contact lead pieces 240 of the two outer movable contact portions 20a. The first push rod 410 is movably drilled through the relief opening 241 of one inner movable contact portion 20a, and the second push rod 420 is drilled through the relief opening 241 of the other inner movable contact portion 20a.

[0059] The fixed contact unit 230 in the movable contact portion 20a where the relief opening 241 is not provided includes one or two fixed contacts 231, and the movable contact unit 220 corresponding to the fixed contact unit 230 includes one or two movable contacts 221.

[0060] In this embodiment, the fixed contact unit 230 of the inner movable contact portion 20a includes two fixed contacts 231, the movable contact unit 220 includes one movable contact 221, the movable contact unit 220 of the outer movable contact portion 20a includes two movable contacts 221, and the fixed contact unit 230 includes one fixed contact 231. The two fixed contacts 231 of the inner movable contact portion 20a correspond to the two movable contacts 221 of the outer movable contact portion 20a, forming two sets of contact pairs. One fixed contact 231 of the inner movable contact portion 20a corresponds to one movable contact 221 of the outer movable contact portion 20a, forming one set of contact pair. That is, the number of contact pairs adjacent to the escape port 241 is two, and the number of contact pairs far from the escape port 241 is one.

[0061] Of course, in other embodiments, the number of contact pairs adjacent to the escape port 241 may be three, four, etc., and the number of contact pairs far from the escape port 241 may be two.

[0062] As shown in FIG. 7, the movable contact lead piece 240 extends along the thickness direction D3 of the base 10, and a part of the movable contact lead piece 240 protrudes from the opening 180 of the base 10, and the part of the movable contact lead piece 240 is configured to be connected to the lead pin 50. The lead pin 50 also extends along the thickness direction D3. The thickness direction D3 is perpendicular to the moving direction of the first push rod 410. In other words, the thickness direction D3 is perpendicular to the first direction D1 and the second direction D2.

[0063] In this embodiment, the movable contact terminal lead piece 240 extends along the thickness direction D3 of the base 10 toward the opening 180 of the base 10 and protrudes from the opening 180 of the base 10. As a result, the dimension in the thickness direction D3 of the movable contact terminal lead piece 240 is increased, compensating for the problem of excessive current-carrying per unit cross-sectional area caused by providing the relief opening 241 and improving the problem of excessive temperature rise. Also, since the two movable contact pieces 210 in one contact portion 20 are arranged in parallel, the two movable contact terminal lead pieces 240 connected to the two movable contact pieces 210 can extend directly along the thickness direction D3 toward the opening 180 of the base 10 without performing a process of bending the movable contact terminal lead piece 240, and the material of the movable contact terminal lead piece 240 can be saved.

[0064] Also, the movable contact terminal lead piece 240 protrudes from the opening 180 and is connected to the lead pin 50, and there is no need to form a slot in the base 10 for accommodating the movable contact terminal lead piece 240. On the other hand, the structural strength of the base 10 is ensured, the deformation resistance ability of the base 10 is improved, the dimensional accuracy of the base 10 is guaranteed and the error is small. On the other hand, the assembly parameter consistency is good when the contact portion 20 and the magnetic circuit portion 30 are mounted in the base 10, the electromechanical parameters are guaranteed, the reliability of the product is improved, and the service life is extended.

[0065] As shown in FIG. 8, the movable contact piece 210 of the movable contact portion 20a can include a plurality of laminated sub-contact pieces 211. In the embodiment of the present invention, the number of sub-contact pieces 211 is 5, but it is not limited thereto. For example, the number of sub-contact pieces 211 may be 2, 3, 4, 6, or other numbers. By designing the movable contact piece 210 to include a plurality of laminated sub-contact pieces 211, on the one hand, the thickness of the sub-contact piece 211 is thin, and the movable contact piece 210 can be made of a thin strip. As a result, the material cost is reduced and the operation is easy. On the other hand, the number of sub-contact pieces 211 can be flexibly adjusted according to the magnitude of the current, whereby the thickness of the movable contact piece 210 can be increased or decreased.

[0066] The movable contact unit 220 and the fixed contact unit 230 are arranged on the movable contact piece 210. The movable contact unit 220 can be connected to the movable contact piece 210 integrally or separately, and the fixed contact unit 230 can also be connected to the movable contact piece 210 integrally or separately.

[0067] When the movable contact unit 220 and the fixed contact unit 230 are separately connected to the movable contact piece 210, the connection method may be caulking, but is not limited thereto.

[0068] Of course, in other embodiments, the movable contact piece 210 may be a single-piece component without using a plurality of laminated sub-contact pieces 211.

[0069] It should be understood that the various examples / embodiments provided by the present invention can be combined with each other without contradiction, and no examples will be listed one by one here.

[0070] In the embodiments of the present invention, the terms "first", "second" and "third" are used only for the purpose of description and should not be understood as indicating or implying relative importance. The term "plurality" means two or more unless otherwise specifically limited. Terms such as "attach", "contact", "connect", "fix", etc. should be understood in a broad sense. For example, "connect" may be a fixed connection, a removable connection, or an integral connection. "Contact" can be a direct connection or an indirect connection through an intermediate medium. The specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

[0071] In the description of the embodiments of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", and "rear" is the orientation or positional relationship based on the drawings, and is merely for facilitating the description and simplification of the embodiments of the present invention, and does not indicate or imply that the indicated device or unit needs to have a specific orientation and be configured and operate in a specific orientation. Therefore, it should not be understood as a limitation to the embodiments of the invention.

[0072] In the description of this specification, the descriptions of terms such as "one embodiment", "several embodiments", and "specific embodiment" mean that the specific features, structures, materials, or characteristics described in connection with this embodiment or example are included in at least one embodiment or example of the embodiments of the invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0073] The above are only preferred embodiments of the embodiments of the invention and are not used to limit the embodiments of the invention. For those skilled in the art, the embodiments of the invention can be variously modified and changed. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the invention should be included in the protection scope of the embodiments of the invention.

Description of Reference Numerals

[0074] 10, Base 101, Bottom Plate 102, Side Wall 110, Intermediate Region 120, First Contact Region 130, Second Contact Region 140, First Movement Region 150, Second Movement Region 161, First Partition Plate 162, Second Partition Plate 163, Third Partition Plate 164, Fourth Partition Plate 170, Accommodation Space 180, Opening 20. Contact part 20a. Movable contact part 210. Movable contact piece 211. Sub-contact piece 210a. First end 210b. Second end 220. Movable contact unit 221. Movable contact 230. Fixed contact unit 231. Fixed contact 240. Movable contact lead-out piece 241. Relief opening 30. Magnetic circuit part 310. Coil assembly 320. Armature assembly 321. Permanent magnet 322. Armature 323. Rocking arm 40. Push rod assembly 410. First push rod 420. Second push rod 50. Lead-out pin D1. First direction D2. Second direction D3. Thickness direction

Claims

1. a contact portion and a push rod assembly; the contact portion includes two sets of movable contactor portions, each set of the movable contactor portions includes a movable contact piece, a movable contact unit, a fixed contact unit, and a movable contactor pull-out piece, the movable contactor pull-out piece is connected to the movable contact piece, the movable contact unit is provided on the movable contact piece, the fixed contact unit is provided on at least one of the movable contact piece and the movable contactor pull-out piece, the two movable contact units correspond to the two fixed contact units respectively, at least one of the two movable contactor pull-out pieces is provided with an escape hole, the fixed contact unit in the movable contactor portion provided with the escape hole includes at least two fixed contacts, the movable contact unit corresponding to the fixed contact unit includes at least two movable contacts, and the at least two fixed contacts correspond to the at least two movable contacts, The push rod assembly includes a first push rod and a second push rod, the first push rod is movably inserted in the recess of the movable contact pull-out piece of one of the movable contact portions, and the first push rod is connected to the movable contact piece of the other movable contact portion, and the second push rod is connected to the movable contact piece of one of the movable contact portions. A relay characterized by:

2. In each set of the movable contact portions, the fixed contact unit is provided at a connection point between the movable contact piece and the movable contact lead piece.

2. A relay as claimed in claim 1.

3. In each set of the movable contactor portion, the movable contact piece has a first end and a second end along a length direction, the movable contact unit is provided at the first end, and the fixed contact unit is provided at a connection point between the second end of the movable contact piece and the movable contactor lead piece, A first end of one of the movable contact pieces corresponds to a second end of the other of the movable contact pieces.

2. A relay as claimed in claim 1.

4. The escape hole is provided in one of the two movable contactor pull-out pieces, and the fixed contact unit in the movable contactor portion not provided with the escape hole includes one or two fixed contacts, and the movable contact unit corresponding to the fixed contact unit includes one or two movable contacts.

2. A relay as claimed in claim 1.

5. The relay further includes a base, the base having an accommodation space, the accommodation space being provided with an opening communicating with an outside of the base; The contact portion is provided within the accommodation space, the movable contact pull-out piece extends along a thickness direction of the base, and a part of the movable contact pull-out piece protrudes from an opening of the base, and the thickness direction is perpendicular to a moving direction of the first push rod.

2. A relay as claimed in claim 1.

6. the relay further comprising a magnetic circuit portion, the magnetic circuit portion drivingly connected to the first push rod and the second push rod; The number of the contact parts is two, and the two contact parts are provided on opposite sides of the magnetic circuit part, with one end of the first push rod and the second push rod being connected to the two movable contact pieces of one of the contact parts, and the other end of the first push rod and the second push rod being connected to the two movable contact pieces of the other contact part.

2. A relay as claimed in claim 1.

7. In each of the contact portions, one of the two movable contact pull-out pieces is provided with the escape hole, The first push rod is movably inserted into the recess of one of the contact portions, and the second push rod is movably inserted into the recess of the other of the contact portions.

7. A relay as claimed in claim 6.

8. The relay further comprises a base having an intermediate region, a first contact region, and a second contact region, the intermediate region being disposed between the first contact region and the second contact region, the first contact region and the second contact region being spaced apart along a first direction; The two contact portions are provided in the first contact region and the second contact region, respectively, and the magnetic circuit portion is provided in the intermediate region.

7. A relay as claimed in claim 6.

9. The base is a first partition plate provided between the first contact area and the intermediate area; a second partition plate provided between the second contact area and the intermediate area.

9. A relay as claimed in claim 8.

10. the base further comprises a first moving region and a second moving region spaced apart along a second direction, the intermediate region being located between the first moving region and the second moving region, the second direction being perpendicular to the first direction; The first push rod is movably provided in the first moving region, and the second push rod is movably provided in the second moving region.

9. A relay as claimed in claim 8.

11. The first contact area, the first moving area, the second contact area and the second moving area are connected end to end in sequence to form a square structure.

11. A relay as claimed in claim 10.

12. In the two contact portions, the four sets of the movable contact units and the fixed contact units are located at the four corners of the square structure.

12. A relay as claimed in claim 11.

13. The base further comprises: a third partition plate provided between the first movement area and the intermediate area; a fourth partition plate provided between the second movement area and the intermediate area.

11. A relay as claimed in claim 10.

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