relay

Abstract

To provide a relay that includes a base, a contact part, a push rod assembly, and a magnetic circuit part.SOLUTION: The contact part is arranged on the base and comprises two sets of movable contact parts; each set of the movable contact parts comprises a movable contact piece, a movable contact unit, and a static contact unit; the movable contact unit is arranged on the movable contact piece; the two movable contact units of the contact part correspond to the two static contact units, respectively; a push rod assembly is connected to the two movable contact pieces; and a magnetic circuit part is arranged on the base and configured to drive the push rod assembly to move so as to drive the two movable contact pieces toward or away from each other, so that the contact part is switched between an ON state and an OFF state; and, when the contact part is in the ON state, one of the movable contact pieces is deformed by an action of the push rod assembly and has an elastic force which makes the movable contact piece tend to be switched to the contact OFF state.SELECTED DRAWING: Figure 4

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] The relay includes a magnetic circuit portion, a push rod assembly, and a contact portion. The magnetic circuit portion includes a coil assembly and an armature assembly. The coil assembly drives the armature assembly to move, and the armature assembly drives the contacts of the contact portion to turn on or off via the push rod assembly.

[0004] However, in the prior art, the utilization rate of the magnetic driving force generated after the coil assembly is energized is not high, and it is not possible to differentiate according to the contact situation. Summary of the Invention

[0005] SUMMARY OF THE INVENTION An embodiment of the present invention provides a relay that solves the problem present in the prior art that the magnetic driving force of a coil assembly is not highly utilized.

[0006] A relay according to an embodiment of the present invention includes a base, a contact portion, a push rod assembly, and a magnetic circuit portion. The contact portion is provided on the base and 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. The two movable contact units of the contact portion correspond to the two fixed contact units, respectively. The push rod assembly is connected to the two movable contact pieces. The magnetic circuit portion is provided on the base. The contact portions are switched between an ON state and an OFF state by driving the push rod assembly to move the two movable contact pieces toward or away from each other. When the contact portions are in the ON state, one of the movable contact pieces is deformed by the action of the push rod assembly and has an elastic force, which causes the movable contact piece to move to the contact OFF state.

[0007] According to some embodiments of the present invention, when the contact portions are in an OFF state, a contact gap between one pair of corresponding movable contact units and the fixed contact units is smaller than a contact gap between the other pair of corresponding movable contact units and the fixed contact units; one set of the movable contact unit and the fixed contact unit having a small contact gap is defined as an arc-resistant end contact, and the other set of the movable contact unit and the fixed contact unit having a large contact gap is defined as a carrier end contact; The movable contact piece of the movable contact unit corresponding to the carrier end contact is defined as a first movable contact piece, and the movable contact piece of the movable contact unit corresponding to the arc-resistant end contact is defined as a second movable contact piece; The first movable contact piece is deformed by the push rod assembly and has the elastic force.

[0008] According to some embodiments of the present invention, the movable contact unit includes one or more movable contacts, the fixed contact unit includes one or more fixed contacts, the corresponding movable contacts and the corresponding fixed contacts form contact pairs, the arc-resistant end contacts include one or more of the contact pairs, and the carrier end contacts include one or more of the contact pairs; The number of contact sets of the arc-resistant end contacts is less than or equal to the number of contact sets of the carrier end contacts.

[0009] According to some embodiments of the present invention, the arc-resistant end contacts include one or two of the contact sets, and the carrier end contacts include two or three of the contact sets.

[0010] According to some embodiments of the present invention, the arc-resistant end contact includes two sets of the contact pairs, and the two sets of the contact pairs are arranged side by side along a width direction of the movable contact portion, The carrier end contacts include two or three of the contact sets, and the two or three contact sets are arranged side by side along the width direction of the movable contact portion.

[0011] According to some embodiments of the present invention, a slit is provided in a portion of the movable contact piece located between two adjacent movable contacts along the width direction of the movable contact piece.

[0012] 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.

[0013] 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; The fixed contact unit is provided at a connection point between the movable contact piece and the movable contact lead piece.

[0014] According to some embodiments of the present invention, the movable contact piece has a first end and a second end opposite to each other in a longitudinal direction thereof, The movable contact unit is provided at the first end, and the second end is connected to the movable contact lead piece, The push rod assembly is connected to the first end of each of the two movable contact pieces.

[0015] According to some embodiments of the present invention, the magnetic circuit portion includes a coil assembly and an armature assembly, the armature assembly is swingably connected to the base, the armature assembly is connected to the push rod assembly, and the coil assembly is used to drive the armature assembly to swing.

[0016] According to some embodiments of the present invention, the movable contact includes a plurality of stacked sub-contacts.

[0017] According to some embodiments of the present invention, the push rod assembly includes a first push rod and a second push rod, and the first push rod and the second push rod are respectively connected to two of the movable contact pieces.

[0018] An 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, one of the movable contact pieces is deformed by the action of the push rod assembly and has an elastic force, which causes the movable contact piece to move to the contact-off state, so the separating force required by the movable contact piece is smaller than that required by the other movable contact piece, and under the assumption that the total separating force provided by the push rod assembly remains unchanged, the separating force provided by the push rod assembly to the other movable contact piece becomes larger. From this, it can be seen that the relay according to the embodiment of the present invention can differentiate the separating force of the push rod assembly according to different contact situations, reducing unnecessary energy loss and improving the utilization rate of the overall coil driving force. [Brief explanation of the drawings]

[0020] [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 diagram in which the base is omitted from FIG. 1, and the contact portion is in the OFF state. [Figure 3] A cross-sectional view of the magnetic circuit is shown. [Figure 4] A schematic diagram of one of the contact portions is shown in FIG. [Figure 5] 1 is a schematic perspective view of a contact portion according to a first embodiment of the present invention; [Figure 6] 1 shows 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 7] 1 shows a schematic exploded 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 8] FIG. 10 is a schematic perspective view of a contact portion according to a second embodiment of the present invention. [Figure 9] FIG. 10 shows 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 10] 10 shows an exploded schematic view of one of the movable contact portions of the contact part according to the second embodiment of the present invention, in which a slit is provided in the movable contact piece. [Figure 11] FIG. 10 shows 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 12] FIG. 10 shows a schematic top view of one of the movable contact portions of the contact portion according to the fourth embodiment of the present invention. [Explanation of symbols]

[0021] 10 base 20 Contact part 20a Movable contact part 210 Movable contact piece 211 Sub-contact piece 212 Carrier Fluid 213 End face 214 Slit 210a First end 210b second end 210c First movable contact piece 210d second moving contact piece 210e third movable contact piece 210f Fourth moving contact piece 220 Moving Contact Unit 221 Movable contact 230 Fixed contact unit 231 Fixed contact 240 Movable contact pull-out piece 250 Arc-resistant end contacts 260 Carrier end contact 30 Magnetic circuit part 310 Coil Assembly 320 Armature Assembly 321 permanent magnet 322 Armature 323 swing arm 40 Push rod assembly 410 First push rod 420 Second Push Rod D1 Length direction D2 width direction DETAILED DESCRIPTION OF THE INVENTION

[0022] 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 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.

[0023] 1 and 2, 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 drive the contacts of the pair of contact portions 20 via the push rod assembly 40 to turn on or off.

[0024] 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 also includes steps or units that are not listed, or optionally includes other steps or components inherent to those processes, methods, products, or devices.

[0025] In one embodiment, the base 10 may have a substantially rectangular shape, but is not limited to such.

[0026] 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.

[0027] 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 lead piece 240, the movable contact piece 210 is connected to the movable contact lead piece 240, the movable contact unit 220 is provided on the movable contact piece 210, and the fixed contact unit 230 is provided on the movable contact piece 210 and / or the movable contact lead piece 240, and the two movable contact units 220 of each contact portion 20 correspond to the two fixed contact units 230, respectively. The movable contact lead piece 240 is fixedly installed on the base 10.

[0028] 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 turning the movable contact unit 220 and the fixed contact unit 230 on or off.

[0029] It can be seen 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.

[0030] 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.

[0031] When the contact portion 20 is in the OFF state, the contact gap between one set of corresponding movable contact units 220 and fixed contact units 230 is smaller than the contact gap between the other set of corresponding movable contact units 220 and fixed contact units 230.

[0032] As shown in FIG. 2, in the contact portion 20 located above the magnetic circuit portion 30, the contact gap between the left movable contact unit 220 and the fixed contact unit 230 is H1, and the contact gap between the right movable contact unit 220 and the fixed contact unit 230 is H2. <H2である。

[0033] Similarly, in the contact portion 20 located below the magnetic circuit portion 30, the contact gap between the right-side movable contact unit 220 and the fixed contact unit 230 is H3, and the contact gap between the left-side movable contact unit 220 and the fixed contact unit 230 is H4. <H4である。

[0034] The different designs of the contact gaps between the two sets of movable contact units 220 and fixed contact units 230 can be achieved by reducing the contact height. Specifically, as shown in FIG. 2, the contact part 20 located above the magnetic circuit part 30 will be taken as an example. The contact thicknesses of the right-side movable contact unit 220 and the fixed contact unit 230 are smaller than those of the left-side movable contact unit 220 and the fixed contact unit 230. When the contact part 20 is in the OFF state, the contact thickness on the right side is smaller than that on the left side, so the contact gap between the right-side movable contact unit 220 and the fixed contact unit 230 is larger, and is larger than the contact gap on the left side.

[0035] Of course, other methods can be used to design the contact gaps to be different, which are not listed here, as long as they can realize that the contact gaps between the two sets of movable contact units 220 and fixed contact units 230 are different when the contact part 20 is in the OFF state, they are all within the protection scope of the present invention.

[0036] In the contact part 20 of the embodiment of the present invention, when the contact part 20 is in the OFF state, the contact gaps between the two sets of movable contact units 220 and fixed contact units 230 are different, so that when the contact part 20 switches from the ON state to the OFF state, the movable contact unit 220 and fixed contact unit 230 of the set with the larger contact gap is turned OFF preferentially over the movable contact unit 220 and fixed contact unit 230 of the set with the smaller contact gap, and when the movable contact unit 220 and fixed contact unit 230 of the set with the larger contact gap has just been turned OFF, the movable contact unit 220 and fixed contact unit 230 of the set with the smaller contact gap has not yet been completely turned OFF. Therefore, the movable contact unit 220 and fixed contact unit 230 of the set with the larger contact gap plays the role of a carrier, and the movable contact unit 220 and fixed contact unit 230 of the set with the smaller contact gap plays the role of an arc-resistant member. Since the movable contact unit 220 and the fixed contact unit 230 in the set with the larger contact gap do not generate an arc when they are turned off, the contact parameters of the entire contact part 20 need only be controlled for the movable contact unit 220 and the fixed contact unit 230 in the set with the smaller contact gap, without taking into account the set with the larger contact gap. Compared with the multi-contact design of the prior art, the contact parameters of the contact part 20 in the embodiment of the present invention are easier to control, and processing is simpler, which is advantageous for improving production efficiency.

[0037] 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.

[0038] 1 and 2, the movable contact piece 210 has a first end 210a and a second end 210b arranged opposite to each other in its longitudinal direction D1, 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. The second end 210b of the movable contact piece 210 is connected to the movable contactor lead piece 240, and 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.

[0039] 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.

[0040] 1 and 2, 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 pushing and pulling motions.

[0041] 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.

[0042] 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 turned on or off by the push and pull action of the double push rod structure.

[0043] Specifically, as shown in Fig. 2, 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 turning off the movable contact unit 220 and the fixed contact unit 230.

[0044] 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. When the two movable contact pieces 210 in one contact part 20 swing in opposite directions and come close to each other, the movable contact unit 220 and the fixed contact unit 230 are turned on.

[0045] As shown in FIG. 3 , the magnetic circuit portion 30 includes a coil assembly 310 and an armature assembly 320, which is swingably connected to the base 10. The coil assembly 310 drives the armature assembly 320 to swing relative 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 sandwiched 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 integrated 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.

[0046] 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, respectively, to turn on or off the movable contact unit 220 and the fixed contact unit 230.

[0047] As shown in Figures 2 and 4, when the contact portion 20 is in the ON state, one of the movable contact pieces 210 is deformed by the action of the push rod assembly 40 and has an elastic force F, which causes the movable contact piece 210 to tend to move to the contact OFF state.

[0048] For ease of explanation, the two movable contact pieces 210 below the magnetic circuit portion 30 in Figure 2 are defined as the first movable contact piece 210c and the second movable contact piece 210d, respectively, and the two movable contact pieces 210 above the magnetic circuit portion 30 in Figure 2 are defined as the third movable contact piece 210e and the fourth movable contact piece 210f, respectively.

[0049] 2 and 4, one end of the first push rod 410 is connected to the first end 210a of the first movable contact 210c, and the other end of the first push rod 410 is connected to the first end 210a of the fourth movable contact 210f. One end of the second push rod 420 is connected to the first end 210a of the second movable contact 210d, and the other end of the second push rod 420 is connected to the first end 210a of the third movable contact 210e. The first push rod 410 drives the first movable contact 210c and the fourth movable contact 210f to swing about their respective second ends 210b, and the second push rod 420 drives the second movable contact 210d and the third movable contact 210e to swing about their respective second ends 210b.

[0050] It will be understood that, after being energized, the coil assembly 310 can drive the armature assembly 320 to swing relative to the base 10. For example, when a positive current flows through the coil assembly 310, the armature assembly 320 swings clockwise, and when a negative current flows through the coil assembly 310, the armature assembly 320 swings counterclockwise.

[0051] The coil driving force generated by energizing the coil assembly 310 must overcome the magnetic holding force generated by the permanent magnet 321 and the elastic force of the four movable contact pieces 210 themselves, which are respectively connected to the first push rod 410 and the second push rod 420. The armature assembly 320 can swing relative to the base 10 only when the coil driving force is greater than the sum of the magnetic holding force and the elastic force.

[0052] In the embodiment of the present invention, when the contact portion 20 is in the ON state, the first movable contact piece 210c is deformed by the action of the first push rod 410 and has an elastic force F, which causes the first movable contact piece 210c to tend to move to the contact OFF state. When the contact portion 20 is in the ON state, the third movable contact piece 210e is deformed by the action of the second push rod 420 and has an elastic force F, which causes the third movable contact piece 210e to tend to move to the contact OFF state.

[0053] When the contact part 20 switches from the ON state to the OFF state, the first push rod 410 pushes the first movable contact piece 210c and swings downward, and the second push rod 420 pushes the third movable contact piece 210e and swings upward. At the same time, the first push rod 410 pulls the fourth movable contact piece 210f and swings downward, and the second push rod 420 pulls the second movable contact piece 210d and swings upward. The first movable contact piece 210c is deformed by the action of the first push rod 410 and has an elastic force F, and the third movable contact piece 210e is deformed by the action of the second push rod 420 and has an elastic force F. Therefore, the total breaking force required by the contact corresponding to H4 plus the breaking force required by the contact corresponding to H2 must be smaller than the breaking force required by the contact corresponding to H1 plus the breaking force required by the contact corresponding to H3. That is, the breaking forces of the first push rod 410 and the second push rod 420 acting on the first movable contact piece 210c and the third movable contact piece 210e are different from the breaking forces of the first push rod 410 and the second push rod 420 acting on the second movable contact piece 210d and the fourth movable contact piece 210f. Therefore, the relay according to the embodiment of the present invention can differentiate the breaking forces of the two push rods according to different contact situations, reducing unnecessary energy loss and improving the utilization rate of the overall coil driving force.

[0054] One set of movable contact unit 220 and fixed contact unit 230 with a small contact gap is defined as an arc-resistant end contact 250 , and the other set of movable contact unit 220 and fixed contact unit 230 with a large contact gap is defined as a carrier end contact 260 .

[0055] In the contact portion 20 located below the magnetic circuit portion 30, the movable contact piece 210 of the movable contact unit corresponding to the carrier end contact 260 is defined as the first movable contact piece 210c, and the movable contact piece 210 of the movable contact unit corresponding to the arc-resistant end contact 250 is defined as the second movable contact piece 210d.

[0056] In the contact portion located above the magnetic circuit portion 30, the movable contact piece 210 of the movable contact unit corresponding to the carrier end contact 260 is defined as the third movable contact piece 210e, and the movable contact piece 210 of the movable contact unit corresponding to the arc-resistant end contact 250 is defined as the fourth movable contact piece 210f.

[0057] In addition, since the arc-resistant end contact 250 has a small contact gap, adhesive force is likely to occur when the contact is broken, and the relay is not reliably disconnected. Therefore, the arc-resistant end contact 250 requires a larger disconnection driving force to reliably disconnect than the carrier end contact 260.

[0058] In the present embodiment, the contacts corresponding to H4 and H2 are carrier end contacts 260, and the contacts corresponding to H1 and H3 are arc-resistant end contacts 250.

[0059] In this embodiment, when the contact portion 20 is in the ON state, the first movable contact piece 210c is deformed by the action of the first push rod 410 and has an elastic force F, which causes the first movable contact piece 210c to move to the contact OFF state. Therefore, when the contact portion 20 switches from the ON state to the OFF state, the carrier end contact 260 corresponding to H4 only requires a small separating force provided by the first push rod 410. Also, when the contact portion 20 is in the ON state, the third movable contact piece 210e is deformed by the action of the second push rod 420 and has an elastic force F, which causes the third movable contact piece 210e to move to the contact OFF state. Therefore, when the contact portion 20 switches from the ON state to the OFF state, the carrier end contact 260 corresponding to H2 only requires a small separating force provided by the second push rod 420.

[0060] Assuming the driving force of the coil assembly 310 remains constant, the required separating force for the carrier end contact 260 corresponding to H4 and the carrier end contact 260 corresponding to H2 is small, and therefore the separating driving force acting on the arc-resistant end contact 250 corresponding to H3 at the lower end of the second push rod 420 and the arc-resistant end contact 250 corresponding to H1 at the upper end of the first push rod 410 is large. This increases the separating force for separating the two arc-resistant end contacts 250, and the larger separating force ensures that the arc-resistant end contacts 250 are reliably separated. In this way, the separating force of the arc-resistant end contact 250 can be increased while reducing the separating force of the carrier end contact 260, thereby reducing unnecessary energy loss. The relay of this embodiment of the present invention not only facilitates control of the parameters of the arc-resistant end contact 250 without considering the parameters of the carrier end contact 260, but also has the advantage of improving the separating reliability of the arc-resistant end contact 250.

[0061] Of course, in embodiments where the number of contact portions 20 is one, three, or any other number, the above-mentioned advantages of reducing the separating force of the carrier end contacts while increasing the separating force of the arc-resistant end contacts are also achieved, and will not be described here.

[0062] 2, in the contact portion 20 located above the magnetic circuit portion 30, the left movable contact unit 220 and the fixed contact unit 230 are defined as arc-resistant end contacts 250, and the right movable contact unit 220 and the fixed contact unit 230 are defined as carrier end contacts 260. In the contact portion 20 located below the magnetic circuit portion 30, the right movable contact unit 220 and the fixed contact unit 230 are defined as arc-resistant end contacts 250, and the left movable contact unit 220 and the fixed contact unit 230 are defined as carrier end contacts 260.

[0063] That is, in this embodiment of the present invention, the two arc-resistant end contacts 250 are located on one diagonal of the base 10, and the two carrier end contacts 260 are located on the other diagonal of the base 10. Both ends of the first push rod 410 correspond to the carrier end contacts 260 and the arc-resistant end contacts 250, respectively, and both ends of the second push rod 420 correspond to the arc-resistant end contacts 250 and the arc-resistant end contacts 250, respectively.

[0064] 7, the movable contact piece 210 includes multiple stacked sub-contact pieces 211. 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. On the other hand, by increasing or decreasing the number of sub-contact pieces 211, the thickness of the movable contact piece 210 can be changed, making it easier to operate.

[0065] 5 and 6, the movable contact unit 220 includes one or more movable contacts 221, the fixed contact unit 230 includes one or more fixed contacts 231, and the corresponding movable contacts 221 and fixed contacts 231 form a contact set, the arc-resistant end contacts 250 include one or more contact sets, and the carrier end contacts 260 include one or more contact sets. The number of contact sets of the arc-resistant end contacts 250 is equal to or less than the number of contact sets of the carrier end contacts 260.

[0066] In this embodiment, both the arc-resistant end contacts 250 and the carrier end contacts 260 can be configured to include multiple contact sets, and the parallel structure formed by the multiple contact sets can further reduce the temperature rise of the relay. Also, since the carrier end contacts 260 function as a carrier and the arc-resistant end contacts 250 function as arc-resistant, by designing the number of contact sets of the arc-resistant end contacts 250 to be equal to or less than the number of contact sets of the carrier end contacts 260, not only can the number of contact sets of the carrier end contacts 260 be increased to suppress temperature rise, but the number of contact sets of the arc-resistant end contacts 250 can also be controlled to facilitate control of contact parameters, and ultimately, contact sets can be added without affecting control of contact parameters.

[0067] 5 and 6, in the embodiment of the present invention, the contact portion 20 includes three contact sets, among which the arc-resistant end contact 250 includes one contact set and the carrier end contact 260 includes two contact sets. The two contact sets of the carrier end contact 260 are arranged side by side along the width direction D2 of the movable contact piece 210.

[0068] 6, a slit 214 is provided along the width direction D2 of the movable contact piece 210 in a portion 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 D1 of the movable contact piece 210, and the other end extends to the fixed contact 231 of the movable contact piece 210.

[0069] In this embodiment, by disposing a slit 214 in the movable contact piece 210, the movable contact piece 210 is divided into a plurality of carrier fluids 212 by the slit 214, and a plurality of movable contacts 221 on the movable contact piece 210 are disposed in one-to-one correspondence with the plurality of carrier fluids 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 contact the fixed contacts 231, and it is possible to avoid a situation where a portion of the movable contact 221 of the movable contact piece 210 has already contacted the fixed contact 231 while another portion of the movable contact 221 has not yet contacted the fixed contact 231, thereby improving the reliability of the contact.

[0070] Of course, in other embodiments, the slit 214 may not be provided in the movable contact piece 210 .

[0071] The movable contact 221 and the stationary contact 231 are provided on the movable contact piece 210. Naturally, the movable contact 221 can be connected to the movable contact piece 210 either integrally or separately, and the stationary contact 231 can also be connected to the movable contact piece 210 either integrally or separately.

[0072] 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.

[0073] Of course, in other embodiments, the movable contact 210 may be a unitary piece instead of using multiple stacked sub-contacts 211 .

[0074] Arc-resistant end contacts have a smaller number of contact sets, allowing each contact to be designed with a larger volume, making the silver layer on the contact less likely to burn and improving contact durability. Furthermore, arc-resistant end contacts have fewer contact sets, making it easier to measure contact parameters. Carrier end contacts have a larger number of contact sets and a multi-contact parallel structure, reducing temperature rise.

[0075] As shown in Figures 8 to 10, 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.

[0076] In the embodiment of the present invention, the contact portion 20 includes four contact sets, among which the number of contact sets of the arc-resistant end contacts 250 is two and the number of contact sets of the carrier end contacts 260 is two. The two contact sets of the arc-resistant end contacts 250 and the two contact sets of the carrier end contacts 260 are both arranged along the width direction D2 of the movable contact piece 210.

[0077] The movable contact piece 210 may or may not have a slit 214 .

[0078] As shown in Figure 11, 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.

[0079] In the embodiment of the present invention, the contact portion 20 includes four contact sets, among which the arc-resistant end contact 250 has one contact set and the carrier end contact 260 has three contact sets. The three contact sets of the carrier end contact 260 are arranged side by side along the width direction D2 of the movable contact piece 210.

[0080] The movable contact piece 210 may or may not have a slit 214 .

[0081] As shown in Fig. 12, 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.

[0082] In the embodiment of the present invention, the contact portion 20 includes five contact sets, of which the number of contact sets of the arc-resistant end contacts 250 is two and the number of contact sets of the carrier end contacts 260 is three.

[0083] The arc-resistant end contact 250 has two contact sets arranged side by side along the width direction D2 of the movable contact piece 210. The carrier end contact 260 has three contact sets arranged side by side along the width direction D2 of the movable contact piece 210.

[0084] 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 therefore, the description thereof will be omitted here.

[0085] 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.

[0086] In describing 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 are not to be understood as limitations on the embodiments of the invention, rather than indicating or implying that the indicated device or unit must have a particular orientation in order to be configured and operate in a particular orientation.

[0087] 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.

[0088] The above is only a preferred embodiment of the invention, and is 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.

Claims

1. A relay including a base, a contact portion, a push rod assembly, and a magnetic circuit portion, the contact portion is provided on the base and 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; The push rod assembly is connected to the two movable contact pieces; The magnetic circuit portion is provided on the base, and drives the push rod assembly to move, thereby moving the two movable contact pieces closer to or farther away from each other, thereby switching the contact portions between an ON state and an OFF state; When the contact portions are in an ON state, one of the movable contact pieces is deformed by the action of the push rod assembly and has an elastic force, and the elastic force causes the movable contact piece to tend to move to a contact OFF state; When the contact portions are in an OFF state, the contact gap between the corresponding movable contact unit and the fixed contact unit of one set is smaller than the contact gap between the corresponding movable contact unit and the fixed contact unit of the other set. A relay characterized by:

2. A pair of the movable contact unit and the fixed contact unit having a small contact gap is defined as an arc-resistant end contact, and the other pair of the movable contact unit and the fixed contact unit having a large contact gap is defined as a carrier end contact, The movable contact piece of the movable contact unit corresponding to the carrier end contact is defined as a first movable contact piece, and the movable contact piece of the movable contact unit corresponding to the arc-resistant end contact is defined as a second movable contact piece; The first movable contact piece is deformed by the push rod assembly to have the elastic force.

2. The relay according to claim 1.

3. the movable contact unit includes one or more movable contacts, the fixed contact unit includes one or more fixed contacts, the corresponding movable contacts and the corresponding fixed contacts form a contact set, the arc-resistant end contacts include one or more of the contact sets, and the carrier end contacts include one or more of the contact sets; The number of contact sets of the arc-resistant end contacts is less than or equal to the number of contact sets of the carrier end contacts.

3. The relay according to claim 2.

4. The arc-resistant end contacts include one or two of the contact sets, The carrier end contacts include two or three sets of the contact sets.

4. The relay according to claim 3.

5. The arc-resistant end contact includes two sets of the contact sets, and the two sets of the contact sets are arranged side by side along the width direction of the movable contact portion, The carrier end contacts include two or three sets of the contact sets, and the two or three sets of the contact sets are arranged side by side along the width direction of the movable contact portion.

4. The relay according to claim 3.

6. A slit is provided in a portion of the movable contact piece located between two adjacent movable contacts along the width direction of the movable contact piece.

4. The relay according to claim 3.

7. One end of the slit penetrates the end face of the movable contact piece along the length of the movable contact piece, and the other end extends to the fixed contact of the movable contact piece.

7. The relay according to claim 6.

8. 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; The fixed contact unit is provided at a connection point between the movable contact piece and the movable contact lead piece.

2. The relay according to claim 1.

9. The movable contact piece has a first end and a second end that are opposed to each other in a longitudinal direction thereof, The movable contact unit is provided at the first end, and the second end is connected to the movable contact lead piece; The push rod assembly is connected to the first end of each of the two movable contact pieces.

9. The relay according to claim 8.

10. the magnetic circuit portion includes a coil assembly and an armature assembly; The armature assembly is swingably connected to the base, the armature assembly is connected to the push rod assembly, and the coil assembly is used to drive the armature assembly to swing.

2. The relay according to claim 1.

11. The movable contact piece includes a plurality of stacked sub-contact pieces.

2. The relay according to claim 1.

12. The push rod assembly includes a first push rod and a second push rod, and the first push rod and the second push rod are respectively connected to the two movable contact pieces.

2. The relay according to claim 1.

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