Relay

Abstract

To provide a relay capable of effectively reducing temperature rise of the relay by improving a structure.SOLUTION: The present invention discloses a relay, including a base, a pair of contact portions and a magnetic circuit portion, wherein the base has a middle region, a first contact region and a second contact region, the middle region is provided between the first contact region and the second contact region, the first contact region and the second contact region are spaced apart along a first direction, and the pair of contact portions are respectively provided in the first contact region and the second contact region; Each contact portion includes two sets of movable contact portions, each set of movable contact portions includes a movable contact piece, a movable contact and a fixed contact, the movable contact piece has a first end and a second end in the second direction, the movable contact is provided at the first end, the fixed contact is provided at the second end, the two movable contacts of each contact portion respectively correspond to the two fixed contacts, and the second direction is arranged perpendicular to the first direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to the technical field of electronic control devices, and in particular to relays. [Background technology]

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

[0003] As the range of relay applications expands, relays are also being developed toward higher loads and smaller sizes. However, the problem of relay temperature rise in the prior art has not been fully resolved, and the relay temperature rise exceeds the required level, which is likely to cause problems such as accelerated deterioration of the plastic and insulating materials inside the relay, oxidation and corrosion of the contacts, making it difficult to stop arcs, and degradation of the technical parameters of electrical elements and reduced reliability. Summary of the Invention

[0004] The embodiments of the present invention provide a relay that can effectively reduce the temperature rise of the relay through an improved structure.

[0005] A relay according to an embodiment of the present invention includes a base, a pair of contact portions, and a magnetic circuit portion; the base has 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 pair of contact portions are respectively provided in the first contact region and the second contact region, each of the contact portions includes two sets of movable contact portions, each set of the movable contact portions includes a movable contact piece, a movable contact, and a fixed contact, the movable contact piece has a first end and a second end in a second direction, the movable contact is provided at the first end, and the fixed contact is provided at the second end, the two movable contacts of each of the contact portions correspond to the two fixed contacts, respectively, and the second direction is perpendicular to the first direction; The magnetic circuit portion is provided in the intermediate region of the base and is used to realize closing or opening of the movable contact and the fixed contact by driving the movement of the four movable contact pieces of the pair of contact portions via a push rod assembly.

[0006] According to some embodiments of the present invention, the movable contact portion of each set further includes a movable contact lead piece, and the movable contact lead piece is connected to the movable contact piece.

[0007] According to some embodiments of the present invention, the four movable contact lead pieces of the pair of contact portions are located at four corners of the base, respectively.

[0008] According to some embodiments of the present invention, in each set of the movable contact portions, the fixed contact is provided at a connection point between the second end of the movable contact piece and the movable contact lead piece.

[0009] According to some embodiments of the present invention, the length of the movable contact piece extends along the second direction.

[0010] According to some embodiments of the present invention, the base comprises: 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.

[0011] According to some embodiments of the present invention, the base further includes a first moving region and a second moving region spaced apart along the second direction, the intermediate region being located between the first moving region and the second moving region; the push rod assembly includes a first push rod and a second push rod, the magnetic circuit portion being drivingly connected to the first push rod and the second push rod, respectively, such that the first push rod is movably disposed in the first region of movement and the second push rod is movably disposed in the second region of movement; one end of the first push rod is connected to a first end of the movable contact piece of one of the contact portions in the first contact area, and the other end of the first push rod is connected to a first end of the movable contact piece of one of the contact portions in the second contact area; One end of the second push rod is connected to a first end of the movable contact piece of the other of the contact portions in the first contact area, and the other end of the second push rod is connected to a first end of the movable contact piece of the other of the contact portions in the second contact area.

[0012] According to some embodiments of the present invention, the magnetic circuit portion includes a coil assembly and an armature assembly, the armature assembly being connected to the base so as to be swingable by the magnetic force of the coil assembly; The armature assemblies are connected to the first push rod and the second push rod, respectively, and are used to drive the first push rod and the second push rod to reciprocate along the first direction.

[0013] According to some embodiments of the present invention, the first push rod and the second push rod move in opposite directions.

[0014] According to some embodiments of the present invention, the first contact area, the first movement area, the second contact area and the second movement area are sequentially connected to each other to form a mouth-shaped structure.

[0015] According to some embodiments of the present invention, in each pair of contact portions, four sets of the movable contact and the fixed contact are respectively located at four corners of a square structure.

[0016] According to some embodiments of the present invention, the movable contact portion of each set further includes a movable contact lead piece, the movable contact lead piece is connected to the movable contact piece, and the fixed contact is provided on the movable contact piece and / or the movable contact lead piece; The four movable contact lead-out pieces of the pair of contact portions are respectively positioned at the four corners of the square-shaped structure.

[0017] According to some embodiments of the present invention, the base further comprises: a third partition plate provided between the first movement area and the intermediate area; and a fourth partition plate provided between the second movement area and the intermediate area.

[0018] According to some embodiments of the present invention, the movable contact piece includes a plurality of stacked sub-contact pieces.

[0019] According to some embodiments of the present invention, the two movable contact pieces in the contact portion are parallel to each other, and the two movable contact pieces have inner surfaces facing each other.

[0020] According to some embodiments of the present invention, a length direction of the movable contact piece is parallel to the second direction, The movable contact piece has the first end and the second end at opposite ends in the length direction.

[0021] An embodiment of the above invention has at least the following advantages or beneficial effects.

[0022] In the relay according to the embodiment of the present invention, the two contact portions 20 are spaced apart in the first direction, and in each contact portion, two sets of movable and fixed contacts are spaced apart in the second direction. Overall, the two contact portions are located in the first and second contact regions of the base, respectively, and are separated by a magnetic circuit portion located in the intermediate region of the base, effectively reducing the influence of thermal radiation from one contact portion on the other. Furthermore, when the contact portions are viewed individually, the two sets of movable and fixed contacts in each contact portion are spaced apart in the second direction, with the movable contact at the first end of the movable contact piece and the fixed contact at the second end of the movable contact piece. Therefore, the distance between the two sets of movable and fixed contacts in each contact portion is maximized in the second direction, reducing the influence of thermal radiation from one set of movable and fixed contacts on the other set of movable and fixed contacts. In summary, the structural design, in which the two contact sections are spaced apart along a first direction and the two sets of movable and fixed contacts in each contact section are arranged along a second direction, effectively reduces the temperature rise of the entire relay and improves the reliability and service life of the relay.

[0023] Furthermore, the two movable contact pieces in each contact section are parallel to each other and have opposing inner surfaces, achieving short-circuit resistance. Therefore, in this embodiment of the present invention, it is not necessary to set the current direction of the movable contact piece and the movable contact piece opposite each other; that is, the movable contact piece does not participate in the function of resisting the electromechanical repulsive force between the contacts. By providing four movable contact piece pieces at the four corners of the base and providing large spacing between them, the thermal radiation generated by the four movable contact piece pieces is prevented from interfering with each other, thereby further reducing temperature rise. At the same time, the four movable contact piece pieces can be directly extended outward from the four corners of the base without bending, thereby saving material used for the movable contact piece pieces and reducing material costs. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a schematic top view of a relay according to an embodiment of the present invention, with an upper cover omitted; [Figure 2] FIG. 2 is a schematic perspective view of the base in FIG. 1. [Figure 3] FIG. 1 shows a schematic diagram in which the base is omitted. [Figure 4] A cross-sectional view of the magnetic circuit is shown. [Figure 5] An exploded schematic diagram of the movable contact portion is shown. [Figure 6] 1 is a schematic top view of a relay according to an embodiment of the present invention, with an upper cover omitted; [Figure 7] This is a schematic diagram in which the base is omitted from FIG. 6, and the contact portion is in a disconnected state. [Figure 8] A cross-sectional view of the magnetic circuit is shown. [Figure 9] 1 is a schematic perspective view of a contact portion according to a first embodiment of the present invention; [Figure 10] 1 is a schematic top view of one of the movable contact portions of the contact portion according to the first embodiment of the present invention; [Figure 11] FIG. 1 shows an exploded schematic view of one of the movable contact portions of the contact section according to the first embodiment of the present invention, in which no slit is provided in the movable contact piece. [Figure 12] FIG. 10 is a schematic perspective view of a contact portion according to a second embodiment of the present invention. [Figure 13] FIG. 10 is a schematic top view of one of the movable contact portions of the contact portion according to the second embodiment of the present invention. [Figure 14] FIG. 10 is an exploded schematic view of one of the movable contact portions of the contact section according to the second embodiment of the present invention, in which a slit is provided in the movable contact piece. [Figure 15] FIG. 10 is a schematic top view of one of the movable contact portions of the contact portion according to the third embodiment of the present invention. [Figure 16] FIG. 10 is a schematic top view of one of the movable contact portions of the contact portion according to the fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] Next, exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments may be implemented in various forms and should not be understood as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to comprehensively and completely explain the present invention and fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings indicate the same or similar components, and detailed descriptions thereof will be omitted.

[0026] 1 to 3, a 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 is closed or opened by driving the contacts of the pair of contact portions 20 via the push rod assembly 40.

[0027] It will be understood that the terms "comprises" and "having," and any variations thereof, in embodiments of the present invention are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device comprising a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or assemblies inherent to such process, method, product, or device.

[0028] The base 10 may include a bottom plate 101 and a side wall 102, the side wall 102 being connected to the periphery of the bottom plate 101, and the side wall 102 and the bottom plate 101 forming a chamber that houses a pair of contact portions 20, a magnetic circuit portion 30, and a push rod assembly 40.

[0029] In one embodiment, the base 10 may be substantially rectangular, but is not limited to such.

[0030] 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 being disposed between the first contact region 120 and the second contact region 130, and the first contact region 120 and the second contact region 130 being spaced apart along a first direction D1.

[0031] A pair of contact portions 20 is provided in the first contact region 120 and the second contact region 130, respectively. That is, the two contact portions 20 are arranged on the base 10 at an interval along the first direction D1.

[0032] Each contact portion 20 includes two sets of movable contact portions 20a, and each set of movable contact portions 20a includes a movable contact piece 210, a movable contact 221, and a fixed contact 231. The movable contact piece 210 has a first end 210a and a second end 210b in a second direction D2, and the movable contact 221 is disposed at the first end 210a, and the fixed contact 231 is disposed at the second end 210b. The two movable contacts 221 of each contact portion 20 correspond to the two fixed contacts 231, respectively. Here, the second direction D2 is perpendicular to the first direction D1.

[0033] The length of the movable contact piece 210 is parallel to the second direction D2. The movable contact piece 210 has a first end 210a and a second end 210b at opposite ends in the length direction. This maximizes the distance between the movable contacts 221 and the fixed contacts 231, preventing heat radiation from one set of the movable contacts 221 and the fixed contacts 231 from affecting the other set of the movable contacts 221 and the fixed contacts 231. This effectively reduces the temperature rise of the contact parts 20. The magnetic circuit part 30 is located in the middle region 110 of the base 10 and drives the movement of the four movable contact pieces 210 of each pair of contact parts 20 via the push rod assembly 40 to connect or disconnect the movable contacts 221 and the fixed contacts 231.

[0034] It will be understood that the relay according to the embodiment of the present invention can control at least two circuits since the relay according to the embodiment of the present invention includes a pair of contact portions 20, and each contact portion 20 can control one circuit. The two contact portions 20 are spaced apart on the base 10 along the first direction D1.

[0035] Here, each contact portion 20 includes two sets of movable contact portions 20a, the structural design of each movable contact portion 20a is almost the same, the two sets of movable contact portions 20a are almost parallel to each other, and each includes a movable contact piece 210, a movable contact 221, and a fixed contact 231.

[0036] Furthermore, the two movable contact pieces 210 in each contact portion 20 are parallel to each other, and each of the two movable contact pieces 210 has an inner surface 2120 facing each other. When the contact portions 20 are in contact, they form a parallel circuit. The current direction of the two movable contact pieces 210 is the same, and in a short-circuit state, the opposing inner surfaces 2120 of the contact portions 20 are magnetically attracted to each other. The magnetically attracted inner surfaces 2120 can resist the electromotive repulsive force in a short-circuit state to maintain the movable contact 221 and the fixed contact 231 in contact.

[0037] The two sets of movable contact portions 20a are arranged opposite each other in the second direction D2. Specifically, as shown in Figures 1 and 3, the contact portions 20 located in the first contact region 120 will be described as an example. The two movable contact pieces 210 in the two sets of movable contact portions 20a are substantially parallel to each other, and 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 221 is provided at the first end 210a of the movable contact piece 210, and the fixed contact 221 is provided at the second end 210b of the movable contact piece 210. Therefore, the movable contacts 221 in one set of movable contact portions 20a correspond to the fixed contacts 231 in the other set of movable contact portions 20a, and the fixed contacts 231 in one set of movable contact portions 20a correspond to the movable contacts 221 in the other set of movable contact portions 20a. Therefore, when the magnetic circuit portion 30 drives the movable contact piece 210 to move via the push rod assembly 40, two pairs of movable contacts 221 and fixed contacts 231 in one set of movable contact portions 20a come into contact with each other to form a parallel circuit structure.

[0038] In the operation process of the relay, the movable contact piece 210 is both an operating part and a carrier body, so it can be understood that the movable contact piece 210 is a part in the relay that is prone to temperature rise.

[0039] In the relay according to the embodiment of the present invention, the two contact portions 20 are spaced apart in the first direction D1, and in each contact portion 20, two sets of movable contacts 221 and fixed contacts 231 are spaced apart 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, thereby effectively reducing the influence of heat radiation generated from one contact portion 20 on the other contact portion 20. Furthermore, when the contact portion 20 is viewed individually, the two sets of movable contacts 221 and fixed contacts 231 in each contact portion 20 are spaced apart along the second direction D2, with the movable contact 221 being provided at the first end 210a of the movable contact piece 210 and the fixed contact 231 being provided at the second end 210b of the movable contact piece 210. Therefore, even in the second direction D2, the distance between the two sets of movable contacts 221 and fixed contacts 231 in each contact portion 20 is maximized, thereby reducing the effect of heat radiation generated from one set of movable contacts 221 and fixed contacts 231 on the other set of movable contacts 221 and fixed contacts 231. In summary, the structural design in which the two contact portions 20 are spaced apart in the first direction D1 and the two sets of movable contacts 221 and fixed contacts 231 in each contact portion 20 are arranged in the second direction D2 effectively reduces the temperature rise of the entire relay and improves the reliability and service life of the relay.

[0040] 1 to 3, each set of movable contact portion 20a further includes a movable contact lead piece 240, which is connected to the movable contact piece 210. In each set of movable contact portion 20a, a fixed contact 231 is provided at a connection point between the second end 210b of the movable contact piece 210 and the movable contact lead piece 240.

[0041] The length of the movable contact piece 210 extends along the second direction D2, and thus the first end 210a and the second end 210b of the movable contact piece 210 are arranged opposite (facing) each other in the length direction of the movable contact piece 210. Therefore, the separation distance between the movable contacts 221 and the fixed contacts 231 provided on the movable contact piece 210 can be made as large as possible, thereby reducing the effect of heat radiation between the two sets of movable contacts 221 and fixed contacts 231.

[0042] 1, the four movable contact pull-out pieces 240 in a pair of contact portions 20 are respectively located at the four corners of the base 10. In this way, the four movable contact pull-out pieces 240 can be spaced as far apart as possible, avoiding the problem of high temperature rise caused by the concentrated installation of the four movable contact pull-out pieces 240. At the same time, the four movable contact pull-out pieces 240 can be pulled out directly from the four corners of the base 10 without bending, thereby saving material used for the movable contact pull-out pieces 240 and reducing material costs.

[0043] Furthermore, the two movable contact pieces 210 in each contact portion 20 are parallel to each other and have opposing inner surfaces 2120, thereby achieving a short-circuit resistance function. Therefore, in this embodiment of the present invention, it is not necessary to set the current directions of the movable contact pull-out piece 240 and the movable contact piece 210 opposite to each other, that is, the movable contact pull-out piece 240 does not participate in the function of resisting the electromechanical repulsive force between the contacts. In this way, by providing four movable contact pull-out pieces 240 at the four corners of the base 10 and widely spacing the four movable contact pull-out pieces 240 from each other, the effect of reducing temperature rise can be achieved.

[0044] 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 area 120 and the middle area 110. The second partition plate 162 is connected to the bottom plate 101 and is disposed between the second contact area 130 and the middle area 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 and the magnetic circuit portion 30, and the second partition plate 162 separates the other contact portion 20 and the magnetic circuit portion 30. In this way, the thermal radiation generated from one contact portion 20 is blocked by the first partition plate 161, and the thermal radiation generated from the other contact portion 20 is blocked by the second partition plate 162, thereby avoiding mutual influence of the thermal radiation generated from the two contact portions 20.

[0045] Continuing to refer to Figures 1 and 2, the base 10 further comprises a first moving region 140 and a second moving region 150 spaced apart along the second direction D2, with the intermediate region 110 located between the first moving region 140 and the second moving region 150.

[0046] The push rod assembly 40 includes a first push rod 410 and a second push rod 420, and the magnetic circuit portion 30 is drivingly connected to the first push rod 410 and the second push rod 420, respectively, so that the first push rod 410 is movably mounted in the first moving region 140 and the second push rod 420 is movably mounted in the second moving region 150.

[0047] 3, one end of the first push rod 410 is connected to the first end 210a of one of the movable contact pieces 210 of the contact portion 20 located in the first contact area 120, and the other end of the first push rod 410 is connected to the first end 210a of one of the movable contact pieces 210 of the contact portion 20 located in the second contact area 130. One end of the second push rod 420 is connected to the first end 210a of the other of the movable contact pieces 210 of the contact portion 20 located in the first contact area 120, and the other end of the second push rod 420 is connected to the first end 210a of the other of the movable contact pieces 210 of the contact portion 20 located in the second contact area 130.

[0048] In this embodiment, the push rod assembly 40 employs a double push rod structure consisting of a first push rod 410 and a second push rod 420, and the contacts are closed or opened by the push and pull of the double push rod structure.

[0049] Specifically, the first push rod 410 and the second push rod 420 move in opposite directions, and 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 part 20, the two movable contact pieces 210 swing in opposite directions away from each other, thereby disconnecting the movable contact 221 from the fixed contact 231.

[0050] 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 around their respective second ends 210b, and the two movable contact pieces 210 connected to the second push rod 420 swing downward around their respective second ends. In one contact part 20, the two movable contact pieces 210 swing in opposite directions and approach each other, thereby closing the movable contact 221 and the fixed contact 231.

[0051] 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 middle 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 middle region 110.

[0052] 1 and 2, the first contact area 120, the first moving area 140, the second contact area 130, and the second moving area 150 are sequentially connected to form a mouth-shaped structure. The magnetic circuit portion 30 is provided within the mouth-shaped structure, with the two contact portions 20 located on two opposite sides of the mouth-shaped structure, and the first push rod 410 and the second push rod 420 located on the other two opposite sides of the mouth-shaped structure.

[0053] In the pair of contact portions 20, the four sets of movable contacts 221 and fixed contacts 231 are respectively located at the four corners of the square-shaped structure. By arranging the four sets of movable contacts 221 and fixed contacts 231 at the four corners of the square-shaped structure in this way, the distance between each set of movable contacts 221 and fixed contacts 231 is increased, which effectively reduces the influence of heat radiation between two adjacent sets of movable contacts 221 and fixed contacts 231.

[0054] As an example, the four movable contact pull-out pieces 240 of the pair of contact portions 20 are respectively arranged at the four corners of the square-shaped structure.

[0055] 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 connected to the base 10 so as to be swingable by the magnetic force of the coil assembly 310. The armature assembly 320 includes a permanent magnet 321, an armature 322, and a swing arm 323. There are two armatures 322, and the permanent magnet 321 is interposed 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 connected to a first push rod 410 and a second push rod 420, respectively.

[0056] By changing the magnetic field direction of the coil assembly 310, the armature assembly 320 is driven to swing relative 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 move back and forth along the first direction D1, thereby disconnecting or closing the movable contact 221 and the fixed contact 231.

[0057] As shown in FIG. 5 , the movable contact piece 210 of the movable contact portion 20a can include multiple stacked sub-contact pieces 211. In this embodiment of the present invention, the number of sub-contact pieces 211 is five, but this is not limited thereto. For example, the number of sub-contact pieces 211 may be two, three, four, six, or other numbers. By designing the movable contact piece 210 to include multiple stacked sub-contact pieces 211, on the one hand, the thickness of the sub-contact pieces 211 is thin, and the movable contact piece 210 can be made of a thin strip of material, resulting in reduced material costs and easier operation. On the other hand, the number of sub-contact pieces 211 can be flexibly adjusted according to the magnitude of the current, thereby increasing or decreasing the thickness of the movable contact piece 210.

[0058] The movable contact 221 and the fixed contact 231 are disposed on the movable contact piece 210. The movable contact 221 can be connected to the movable contact piece 210 either integrally or separately, and the fixed contact 231 can also be connected to the movable contact piece 210 either integrally or separately.

[0059] When the movable contact 221 and the fixed contact 231 are connected to the movable contact piece 210 as separate bodies, the connection method may be crimping, but is not limited to this.

[0060] Of course, in other embodiments, the movable contact 210 may be a unitary piece without using multiple stacked sub-contacts 211 .

[0061] It should be understood that the various examples / embodiments provided by the present invention can be combined with each other without contradiction, and examples will not be listed here one by one.

[0062] Furthermore, the moving contact in a relay is a component that is prone to temperature rise. In the prior art, moving contacts are designed with multiple contact sets to reduce the temperature rise of relays. However, increasing the number of contact sets affects the management of contact parameters, makes production difficult, and reduces production efficiency.

[0063] The embodiments of the present invention provide contacts and relays to eliminate contacts that may exist in the prior art. It affects the management of point parameters and solves the problem of difficulty in production manufacturing.

[0064] A contact portion according to an embodiment of the present invention is applied to a relay, 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, and a fixed contact unit, the movable contact unit is provided on the movable contact piece, and the two movable contact units of the contact portion correspond to the two fixed contact units, respectively, wherein the corresponding movable contact unit and the fixed contact unit of one set are defined as first contacts, and the corresponding movable contact unit and the fixed contact unit of the other set are defined as second contacts; The movable contact unit includes at least one movable contact, the fixed contact unit includes at least one fixed contact, each of the at least one movable contact corresponds to at least one of the fixed contacts, and the corresponding movable contact and the corresponding fixed contact form a contact pair, and at least one of the second contact and the first contact includes at least two of the contact pairs.

[0065] According to some embodiments of the present invention, the movable contact portion of each set further includes a movable contact lead piece, the movable contact lead piece being connected to the movable contact piece, and at least one fixed contact of the fixed contact unit being provided on the movable contact piece and / or the movable contact lead piece.

[0066] According to some embodiments of the present invention, in each set of the movable contact portions, at least one of the fixed contacts of the fixed contact unit is provided at the connection point between the movable contact piece and the movable contact lead piece.

[0067] According to some embodiments of the present invention, the length of the movable contact piece has a first end and a second end that are oppositely disposed, and at least one of the movable contacts is provided at the first end, and at least one of the fixed contacts is provided at the second end. In the contact portion, the two movable contact pieces are installed in parallel, and the movable contact unit located at the first end of one of the movable contact pieces corresponds to the fixed contact unit located at the second end of the other movable contact piece, so that the two pairs of movable contact units and fixed contact units come into contact to form a parallel circuit structure.

[0068] According to some embodiments of the present invention, the number of contact sets of the first contacts is less than or equal to the number of contact sets of the second contacts.

[0069] According to some embodiments of the present invention, the first contacts include one or two of the contact sets; The second contacts include two or three sets of the contacts.

[0070] According to some embodiments of the present invention, the first contact includes two of the contact sets, and the two contact sets are arranged in parallel along a width direction of the movable contact piece, The second contact includes two or three contact sets, and the two or three contact sets in the second contact are arranged in parallel along the width direction of the movable contact piece.

[0071] According to some embodiments of the present invention, a slit is provided along the width direction of the movable contact piece in a portion located between two adjacent movable contacts of the movable contact piece.

[0072] According to some embodiments of the present invention, the slit extends along the length of the movable contact piece, with one end penetrating the end face of the movable contact piece and the other end extending to the fixed contact of the movable contact piece.

[0073] According to some embodiments of the present invention, the movable contact piece includes a plurality of stacked sub-contact pieces.

[0074] A relay according to an embodiment of the present invention includes any of the contact portions described above.

[0075] An embodiment of the above invention has at least the following advantages or beneficial effects.

[0076] In the contact portion of the embodiment of the present invention, at least one of the first contact and the second contact includes at least two contact pairs, and thus the contact portion includes at least three contact pairs, forming a multi-contact contact portion. The parallel structure formed by the at least three contact pairs of the contact portion can further reduce the temperature rise of the relay. At the same time, the at least three contact pairs are not centrally located, but each corresponds to a first contact and a second contact, so that the contact parameters of each contact pair of the first contact and the second contact are easy to manage, processing is simple, and productivity is improved.

[0077] Next, exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments may be implemented in various forms and should not be understood as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to comprehensively and completely explain the present invention and fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings indicate the same or similar components, and detailed descriptions thereof will be omitted.

[0078] 6 and 7, a 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 can be driven via the push rod assembly 40 to close or open the contacts of the pair of contact portions 20.

[0079] It will be understood that the terms "comprises" and "having," and any variations thereof, in embodiments of the present invention are intended to cover inclusiveness without exclusion. For example, a process, method, system, product, or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally includes other steps or components inherent to those processes, methods, products, or devices.

[0080] In one embodiment, the base 10 may have a substantially rectangular shape, but is not limited to such.

[0081] The pair of contact portions 20 may be provided on two opposing side surfaces of the magnetic circuit portion 30. Of course, the pair of contact portions 20 may also be provided on the same side of the magnetic circuit portion 30.

[0082] Each contact portion 20 includes two sets of movable contact portions 20a, and each set of movable contact portions 20a includes a movable contact piece 210, a movable contact unit 220, a fixed contact unit 230, and a movable contact pull-out piece 240, where the movable contact piece 210 is connected to the movable contact pull-out piece 240, and the movable contact unit 220 is provided on the movable contact piece 210 and on the fixed contact unit 230, the movable contact piece 210, and / or the movable contact pull-out piece 240. The two movable contact units 220 of each contact portion 20 correspond to the two fixed contact units 230, respectively.

[0083] The magnetic circuit portion 30 is provided on the base 10 and drives the movement of the four movable contact pieces 210 of the pair of contact portions 20 via the push rod assembly 40, thereby realizing the closing or opening of the movable contact unit 220 and the fixed contact unit 230.

[0084] It can be understood that the relay in the embodiment of the present invention includes a pair of contact portions 20, and each contact portion 20 can control one circuit, so that the relay in the embodiment of the present invention can control at least two circuits.

[0085] Of course, in other embodiments, the relay may include only one contact portion 20, and this contact portion 20 may control one circuit, and therefore the relay may control one circuit.

[0086] As an example, in each set of movable contact portions 20a, the fixed contact unit 230 is provided at the connection point between the movable contact piece 210 and the movable contact lead piece 240.

[0087] As shown in Figures 6 and 7, the movable contact piece 210 has a first end 210a and a second end 210b that are disposed opposite each other in the longitudinal direction D3. That is, the first end 210a and the second end 210b are disposed at opposite ends of the movable contact piece 210 in the longitudinal direction D3. In this manner, the distance between the first end 210a and the second end 210b can be increased. The movable contact unit 220 is provided at the first end 210a, and the fixed contact unit 230 is provided at the second end 210b. Furthermore, since the second end 210b of the movable contact piece 210 is connected to the movable contactor lead piece 240, the fixed contact unit 230 is provided at the connection point between the second end 210b of the movable contact piece 210 and the movable contactor lead piece 240.

[0088] In the contact portion 20, the two movable contact pieces 210 are arranged in parallel, so that two pairs of movable contact units 220 and fixed contact units 230 contact each other to form a parallel circuit structure, and the movable contact unit 220 located at the first end 210a of one movable contact piece 210 corresponds to the fixed contact unit 230 located at the second end 210b of the other movable contact piece 210. The contact portion 20 is designed as a parallel circuit structure, which effectively reduces temperature rise.

[0089] In the embodiment of the present invention, in one contact portion 20, two sets of corresponding movable contact units 220 and fixed contact units 230 are defined as first contacts 250 and second contacts 260, respectively, and it can be understood that the first contacts 250 and second contacts 260 are provided at the first end 210a and the second end 210b of the movable contact piece 210, respectively. That is, either the first contact 250 or the second contact 260 is provided at one end in the length direction of the two parallel movable contact pieces 210, and the other of the first contact 250 and the second contact 260 is provided at the other end in the length direction of the two parallel movable contact pieces 210. This allows the distance between the first contact 250 and the second contact 260 to be increased, preventing contamination of the second contact 260 by arcs generated from the first contact 250 and extending the service life of the product.

[0090] 6 and 7, the push rod assembly 40 includes a first push rod 410 and a second push rod 420, which are respectively disposed on two opposite sides of the magnetic circuit portion 30. The magnetic circuit portion 30 is drivingly connected to the first push rod 410 and the second push rod 420, respectively, so that the first push rod 410 and the second push rod 420 perform reciprocating push-pull movements.

[0091] One end of the first push rod 410 is connected to the first end 210a of one of the movable contact pieces 210 of one of the contact portions 20, and the other end of the first push rod 410 is connected to the first end 210a of one of the movable contact pieces 210 of the other contact portion 20. One end of the second push rod 420 is connected to the first end 210a of the other movable contact piece 210 of one of the contact portions 20, 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 other contact portion 20.

[0092] In this embodiment, the push rod assembly 40 employs a double push rod structure consisting of a first push rod 410 and a second push rod 420, and the contacts are closed or opened by the push and pull of the double push rod structure.

[0093] Specifically, as shown in Figure 7, the first push rod 410 and the second push rod 420 move in opposite directions, and when the first push rod 410 moves downward, the second push rod 420 moves upward. As the first push rod 410 moves downward, the two movable contact pieces 210 connected to the first push rod 410 both swing downward around their respective second ends 210b. As the second push rod 420 moves upward, the two movable contact pieces 210 connected to the second push rod 420 both swing upward around their respective second ends 210b. In one contact portion 20, the two movable contact pieces 210 swing in opposite directions and move away from each other, thereby disconnecting the movable contact unit 220 and the fixed contact unit 230.

[0094] 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 both swing upward around their respective second ends 210b, and the two movable contact pieces 210 connected to the second push rod 420 both swing downward around their respective second ends 210b. In one contact portion 20, the two movable contact pieces 210 swing in opposite directions and come close to each other, thereby realizing the closure of the movable contact unit 220 and the fixed contact unit 230.

[0095] As shown in FIG. 8 , 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 swingably connected to the base 10. The armature assembly 320 includes a permanent magnet 321, an armature 322, and a swing arm 323. There are two armatures 322, and the permanent magnet 321 is interposed between the two armatures 322. The swing arm 323 is formed of an insulating material such as plastic, and the permanent magnet 321, armature 322, and swing arm 323 are connected as an integral part by integral injection molding. Both ends of the swing arm 323 are connected to a first push rod 410 and a second push rod 420, respectively.

[0096] By changing the direction of the magnetic field of the coil assembly 310, the armature assembly 320 is driven to swing relative to the base 10. The swing arm 323 of the armature assembly 320 drives the first push rod 410 and the second push rod 420 to move back and forth, thereby closing or opening the movable contact unit 220 and the fixed contact unit 230.

[0097] In one contact portion 20, one pair of corresponding movable contact units 220 and fixed contact units 230 is defined as a first contact 250, and the other pair of corresponding movable contact units 220 and fixed contact units 230 is defined as a second contact 260. As shown in Fig. 7, in a contact portion 20 located above the magnetic circuit portion 30, the movable contact unit 220 and fixed contact unit 230 on the left side are defined as the first contact 250, and the movable contact unit 220 and fixed contact unit 230 on the right side are defined as the second contact 260. In a contact portion 20 located below the magnetic circuit portion 30, the movable contact unit 220 and fixed contact unit 230 on the right side are defined as the first contact 250, and the movable contact unit 220 and fixed contact unit 230 on the left side are defined as the second contact 260.

[0098] 9 and 10 , the movable contact unit 220 includes at least one movable contact 221, the fixed contact unit 230 includes at least one fixed contact 231, and corresponding movable contacts 221 and fixed contacts 231 form contact pairs, the first contact 250 includes at least one contact pair, and the second contact 260 includes at least one contact pair. At least one of the second contact 260 and the first contact 250 includes at least two contact pairs. Furthermore, the number of contact pairs of the first contact 250 is less than or equal to the number of contact pairs of the second contact 260.

[0099] In this embodiment, at least one of the first contact 250 and the second contact 260 includes at least two contact pairs, and thus the contact portion 20 includes at least three contact pairs, forming a multi-contact contact portion 20. The parallel structure formed by the at least three contact pairs of the contact portion 20 can further reduce the temperature rise of the relay. At the same time, the at least three contact pairs are not centrally located, but each corresponds to the first contact 250 and the second contact 260, so that the contact parameters of each contact pair of the first contact 250 and the second contact 260 are easy to manage, processing is simple, and productivity is improved.

[0100] In an embodiment of the present invention, a portion of the at least three contact sets is installed at one end of the length direction D3 of the two parallel movable contact pieces 210, and another portion of the at least three contact sets is installed at the other end of the length direction D3 of the two parallel movable contact pieces 210.

[0101] 9 and 10 , in the embodiment of the present invention, the contact portion 20 includes three contact sets, where the number of contact sets of the first contact 250 is one and the number of contact sets of the second contact 260 is two. The two contact sets of the second contact 260 are arranged in parallel along the width direction D4 of the movable contact piece 210.

[0102] 10 , a slit 214 is provided along the width direction D4 of the movable contact piece 210 in a portion located between two adjacent movable contacts 221 of the movable contact piece 210. One end of the slit 214 penetrates the end face 213 of the movable contact piece 210 along the length direction D3 of the movable contact piece 210, and the other end extends to the fixed contact 231 of the movable contact piece 210.

[0103] In this embodiment, by arranging slits 214 in the movable contact piece 210, the movable contact piece 210 is divided into a plurality of carrier bodies 212 by the slits 214, and a plurality of movable contacts 221 on the movable contact piece 210 are arranged in one-to-one correspondence with the plurality of carrier bodies 212. This allows the plurality of movable contacts 221 on the movable contact piece 210 to move relatively independently, so that the plurality of movable contacts 221 reliably come into contact with the fixed contacts 231, and it is possible to avoid a situation where part of the movable contact 221 of the movable contact piece 210 has already come into contact with the fixed contact 231, while the other part of the movable contact 221 has not yet come into contact with the fixed contact 231, thereby improving the reliability of the contact.

[0104] Of course, in other embodiments, the slit 214 may not be provided in the movable contact piece 210 .

[0105] As shown in Figure 11, the movable contact piece 210 includes a plurality of stacked sub-contact pieces 211. In this embodiment of the present invention, the number of sub-contact pieces 211 is five, but is not limited thereto. For example, the number of sub-contact pieces 211 may be two, three, four, six, or other numbers. By designing the movable contact piece 210 to include a plurality of stacked sub-contact pieces 211, on the one hand, the thickness of the sub-contact pieces 211 is thin, and the movable contact piece 210 can be made of a thin strip of material, resulting in reduced material costs and easier operation. On the other hand, the number of sub-contact pieces 211 can be flexibly adjusted according to the magnitude of the current, thereby increasing or decreasing the thickness of the movable contact piece 210.

[0106] The movable contact 221 and the fixed contact 231 are provided on the movable contact piece 210. It can be understood that the movable contact 221 can be connected to the movable contact piece 210 either integrally or separately, and that the fixed contact 231 can also be connected to the movable contact piece 210 either integrally or separately.

[0107] When the movable contact 221 and the fixed contact 231 are connected to the movable contact piece 210 separately, the connection method may be crimping, but is not limited to this.

[0108] Of course, in other embodiments, the movable contact 210 may be a unitary piece without the use of multiple stacked sub-contacts 211 .

[0109] The first contact has a small number of contact sets, allowing each contact to be designed with a large volume, improving contact durability. The first contact also has a small number of contact sets, making it convenient for measuring contact parameters. The second contact has a large number of contact groups, forming a multi-contact parallel structure to reduce temperature rise.

[0110] As shown in Figures 12 to 14, the contact portion 20 of the second embodiment has a basic structure that is substantially the same as that of the contact portion 20 of the first embodiment. Therefore, in the following description of the contact portion 20 of the second embodiment, the structure already described in the first embodiment will not be repeated. Note that the same components as those in the contact portion 20 described in the first embodiment are denoted by the same reference numerals. Therefore, in the following description of this embodiment, the differences from the contact portion 20 of the first embodiment will be mainly described.

[0111] In the embodiment of the present invention, the contact portion 20 includes four contact sets, where the number of contact sets of the first contact 250 is two and the number of contact sets of the second contact 260 is two. The two contact sets of the first contact 250 and the two contact sets of the second contact 260 are both arranged along the width direction D4 of the movable contact piece 210.

[0112] The movable contact piece 210 may or may not have a slit 214 .

[0113] As shown in Figure 15, the contact portion 20 of the third embodiment has a basic structure that is substantially the same as that of the contact portion 20 of the second embodiment. Therefore, in the following description of the contact portion 20 of the third embodiment, the structure already described in the second embodiment will not be repeated. Note that the same components as those in the contact portion 20 described in the second embodiment are denoted by the same reference numerals. Therefore, the following description of this embodiment will focus on the differences from the contact portion 20 of the second embodiment.

[0114] In the embodiment of the present invention, the contact portion 20 includes four contact sets, where the number of contact sets of the first contact 250 is one and the number of contact sets of the second contact 260 is three. The three contact sets of the second contact 260 are arranged in parallel along the width direction D4 of the movable contact piece 210.

[0115] The movable contact piece 210 may or may not have a slit 214 .

[0116] As shown in Fig. 16, the contact portion 20 of the fourth embodiment has a basic structure that is substantially the same as that of the contact portion 20 of the first embodiment. Therefore, in the following description of the contact portion 20 of the fourth embodiment, the structure already described in the first embodiment will not be repeated. Note that the same components as those in the contact portion 20 described in the first embodiment are denoted by the same reference numerals. Therefore, the following description of this embodiment will focus on the differences from the contact portion 20 of the first embodiment.

[0117] In an embodiment of the present invention, the contact portion 20 includes five contact sets, where the number of contact sets of the first contacts 250 is two and the number of contact sets of the second contacts 260 is three.

[0118] The first contact 250 has two contact pairs arranged in parallel along the width direction D4 of the movable contactor 210. The second contact 260 has three contact pairs arranged in parallel along the width direction D4 of the movable contactor 210.

[0119] It should be noted that the various examples / embodiments provided by the present invention can be combined with each other without causing any contradiction, and will not be listed and described here.

[0120] In the embodiments of the invention, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be understood to indicate or imply relative importance. The term "plurality" means two or more unless otherwise limited. Terms such as "attached," "contact," "connected," and "fixed" should be understood broadly. For example, "connected" may mean a fixed connection, a detachable connection, or an integral connection. "Contacted" may mean a direct connection or an indirect connection via 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 depending on the specific circumstances.

[0121] In describing the embodiments of the present invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front," and "rear" are orientations or positional relationships based on the drawings and are intended merely to facilitate the description and simplification of the embodiments of the present invention, and do not indicate or imply that the indicated device or unit must have a particular direction in order to be configured and operate in a particular orientation, and should not be understood as limitations on the embodiments of the invention.

[0122] In the description herein, the terms "one embodiment," "some embodiments," "particular embodiment," etc., mean that the particular feature, structure, material, or characteristic described in connection with this embodiment or example is included in at least one embodiment or example of the invention. In this specification, general references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0123] The above are only preferred embodiments of the invention, and are not used to limit the invention, and those skilled in the art can make various modifications and changes to the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the invention shall be included in the protection scope of the invention. [Explanation of symbols]

[0124] 10. Bass 101, bottom plate 102, side wall 110, intermediate area 120, first contact area 130, second contact area 140 , the first moving area 150, second movement area 161 - First partition 162 - Second partition 163. Third partition 164, 4th partition 20, contact part 20a, movable contact part 210, movable contact piece 211, sub-contact piece 212 , carrier body 213, end face 214, Slit 2120, inside 210a, first end 210b, second end 220, moving contact unit 221, movable contact 230, fixed contact unit 231, fixed contact 240, Movable contact pull-out piece 250, first contact point 260, the second contact point 30. Magnetic circuit part 310, coil assembly 320, armature assembly 321. Permanent magnets 322, Armature 323, swing arm 40. Push rod assembly 410, first push rod 420, second push rod D1, first direction D2, second direction D3, lengthwise D4, width direction

Claims

[Claim 1] A relay including a base, a pair of contact portions, and a magnetic circuit portion, the base has 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 pair of contact portions are respectively provided in the first contact region and the second contact region, each of the contact portions includes two sets of movable contact portions, each set of the movable contact portions includes a movable contact piece, a movable contact, and a fixed contact, the movable contact piece has a first end and a second end in a second direction, the movable contact is provided at the first end, and the fixed contact is provided at the second end, the two movable contacts of each of the contact portions correspond to the two fixed contacts, respectively, and the second direction is perpendicular to the first direction; the magnetic circuit portion is provided in the intermediate region of the base and is used to drive the movement of the four movable contact pieces of the pair of contact portions via a push rod assembly, thereby realizing closing or opening of the movable contact and the fixed contact; The number of the pair of contact portions is one pair, and four movable contact lead-out pieces of the pair of contact portions are located at four corners of the base, respectively.

Images