Relay beneficial to improving stability

Abstract

The invention relates to a relay beneficial for improving stability. The relay comprises a main shell, an auxiliary shell and a main electric connection assembly, the main shell comprises a main base and a main cover plate. And the main base is provided with a main electric connecting part close to the main base. The main electric connection part comprises a main containing groove, a main elastic piece base and a main elastic piece abutting block. The main base is provided with an inserting groove. The main electric connection assembly comprises a main static spring assembly and a main static spring assembly. The main static spring assembly comprises a main static contact. The main static contact is provided with a groove. The driving spring assembly comprises a driving reed, a driving contact and a main elastic sheet. Inserting grooves and limiting blocks are arranged on the end face, facing the auxiliary shell, of the main base at intervals, and inserting blocks are arranged on the auxiliary base. And the two inserting blocks are inserted and fixed corresponding to the two inserting grooves, and splicing of the auxiliary shell and the main shell is completed.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to a relay which is beneficial to improving stability. Background Art

[0002] Most existing magnetic latching relays can only connect one electrical device at a time. When multiple devices need to be connected, a relay is often required on each line, which increases the cost of line setting. Therefore, a magnetic latching relay that can be connected in series has appeared on the market, which only requires one relay when connecting multiple circuits. As disclosed in CN201821554424.2, the multi-phase magnetic latching relay includes a base, a magnetic circuit part, a contact part and a push card; the magnetic circuit part and the contact part are respectively installed in the base, the contact part is composed of multiple groups of dynamic and static spring parts, and the dynamic and static contacts of each group of dynamic and static spring parts are in mutually coordinated positions, and the push card is connected between the dynamic spring part of the magnetic circuit part and the contact part; the magnetic circuit part includes an H-type structure armature part, the H-type structure armature part is provided with a rotating shaft, an action arm is extended outwardly on one side of the H-type structure, a card column for cooperating with the push card is provided at the end of the action arm, and the axial direction of the card column is the same as the axial direction of the rotating shaft; an extension arm is extended outwardly on the other side of the H-type structure, a switch toggle column is provided on the extension arm, and the axial direction of the switch toggle column is the same as the axial direction of the rotating shaft.

[0003] However, when new equipment or functional modules need to be added, the entire control system needs to be remodeled on a large scale, such as replacing relays, which will force a large number of normally working relays to be scrapped, which is not conducive to cost control. Existing expandable relays only add a set of electrical connection components when expanding, and do not consider whether the original permanent magnetic components have enough force to maintain contact between contacts and overcome the repulsive force between contacts after adding components, resulting in a decrease in the stability of the relay. Summary of the invention

[0004] In view of this, the present invention provides a relay that is beneficial to improving stability to solve the above technical problems.

[0005] A relay that is beneficial to improving stability, which includes a main housing, at least one sub-housing plugged on one side of the main housing, and a set of main electrical connection components arranged in the main housing. The main housing includes a main base, and the main base includes a main electrical connection part. At least two plug slots are spacedly arranged on the end surface of the main base facing the sub-housing, and at least two plug blocks are spacedly arranged on the end surface of the sub-housing facing the main base. The number of the plug blocks is the same as that of the plug slots and they are plugged and fixed to each other. The main electrical connection part includes a main accommodation groove, a main partition arranged in the main accommodation groove, a main spring base arranged on the main partition, and a main spring abutting block arranged on the side wall of the main spring base. The main electrical connection components include a main static contact assembly arranged in the main accommodation groove, and a main moving contact assembly with one end fixedly arranged in the main accommodation groove. The main static contact assembly includes a main static contact, and the main moving contact assembly includes a main moving spring piece with one end fixedly arranged in the main accommodation groove, at least one main moving contact arranged on the free end of the main moving spring piece, and a main spring arranged in the main spring base. The main spring is in a U-shaped structure and includes two main abutting walls and a main arc surface connecting the two main abutting walls. One main abutting wall of the main spring abuts on the main moving spring piece, and the other main abutting wall is accommodated between the main spring base and the main spring abutting block. Along the elastic force direction perpendicular to the two main abutting walls, the maximum length of the main spring is less than the maximum distance between the main spring base and the main spring abutting block. The main arc surface faces the main spring base. When the main moving contact and the main static contact are disengaged, the main spring is compressed, the two main abutting walls of the main spring converge, and there is an acute angle between the two main abutting walls and the main arc surface abuts on the main spring base. When the main moving contact and the main static contact are abutted and powered on, the two main abutting walls of the main spring open, and there is an obtuse angle between the two main abutting walls and the end of the main abutting wall abuts on the main spring abutting block.

[0006] Further, the contour of the main spring base is arc-shaped.

[0007] Further, a coil assembly, a magnet assembly arranged on one side of the coil assembly, and a dial plate with one end connected to the magnet assembly are also arranged in the main housing.

[0008] Further, the dial plate includes a dial plate body, a swing arm card slot arranged at one end of the dial plate body, two dial piece slots spacedly arranged at both ends of the dial plate body, and an avoidance opening arranged between the two dial piece slots.

[0009] Further, a main cover plate is provided on the main base. A coil mounting portion is provided near one side of the main base, a magnet mounting portion provided on one side of the coil mounting portion, and a main sliding groove provided on one side of the magnet mounting portion and the main electrical connection portion. The main electrical connection portion is provided on one side of the magnet mounting portion.

[0010] Further, the sub-housing includes a sub-base, and a sub-cover plate covering the sub-base. A sub-expansion portion is provided in the sub-base. The sub-expansion portion includes a sub-accommodation groove, a sub-spring base provided on one side of the sub-accommodation groove close to the main housing, and a sub-spring slot provided on the side wall of the sub-spring base.

[0011] Further, a sub-electrical connection assembly is accommodated in the sub-housing. The sub-electrical connection assembly includes a sub-static spring assembly fixedly provided on the side wall of the sub-accommodation groove, and a sub-moving spring assembly with one end fixedly provided in the sub-accommodation groove.

[0012] Further, the sub-static spring assembly includes a sub-static spring piece, and at least one sub-static contact point provided on the sub-static spring piece.

[0013] Further, the sub-moving spring assembly includes a sub-moving spring piece, at least one sub-moving contact point provided on the free end of the sub-moving spring piece, and a sub-spring provided in the sub-spring base.

[0014] Further, a groove is provided on the main static contact point. The two side walls of the groove are inclined outward and are arc-shaped. The end face of the main moving contact point is a spherical surface. When the main moving contact point abuts against the main static contact point, the contact between the main moving contact point and the main static contact point expands from single-point contact to multi-point contact.

[0015] Compared with the prior art, a relay provided by the present invention which is beneficial to improving stability is characterized in that two insertion slots are provided at intervals on the end face of the main base facing the sub-housing, and two limiting blocks are provided at the ends of the insertion slots close to the main cover plate. A sub-sliding groove is provided on one side of the sub-base close to the main sliding groove. The sub-sliding groove communicates with the main sliding groove, so that the dial plate can connect the main electrical connection portion and the sub-expansion portion at the same time. Two insertion blocks are provided at intervals on the end face of one side of the sub-base facing the main base. The two insertion blocks are inserted and fixed corresponding to the two insertion slots until one end of the insertion block abuts against the limiting block, then the splicing of the sub-housing and the main housing can be completed, and the expansion is convenient. A main spring and a sub-spring are respectively provided on the main accommodation groove and the sub-accommodation groove, reducing the thrust requirement on the permanent magnet when the contacts are closed, so that the relay has better combined stability between the contacts after modular expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural view of a relay provided by the present invention, which is beneficial to improving stability.

[0017] Figure 2 For Figure 1 schematic internal structural view of the relay that is beneficial to improving stability.

[0018] Figure 3 For Figure 2 schematic structural view of the main base of the relay that is beneficial to improving stability.

[0019] Figure 4 For Figure 2 schematic structural view of the secondary base of the relay that is beneficial to improving stability.

[0020] Figure 5 For Figure 2 schematic structural view of the dial plate of the relay that is beneficial to improving stability.

[0021] Figure 6 For Figure 2 schematic structural view of the main static contact of the relay that is beneficial to improving stability.

[0022] Figure 7 For Figure 2 schematic structural view of the main moving contact of the relay that is beneficial to improving stability.

[0023] Figure 8 For Figure 2 schematic structural view of the main spring piece of the main electrical connection component.

[0024] Figure 9 For Figure 2 schematic structural view of the secondary spring piece of the secondary electrical connection component.

[0025] Figure 10 For Figure 2 schematic structural view of another perspective of the relay that is beneficial to improving stability.

[0026] Reference numerals: main housing 10, main base 11, main cover plate 12, coil mounting portion 13, magnet mounting portion 14, main electrical connection portion 15, main accommodating groove 151, main partition 152, main spring base 153, main spring abutting block 154, main sliding groove 16, insertion slot 17, limiting block 18, sub-housing 20, sub-base 21, sub-cover plate 22, sub-expansion portion 23, sub-accommodating groove 231, sub-spring base 232, sub-spring insertion slot 233, sub-sliding groove 24, insertion block 25, coil assembly 30, coil skeleton 31, electromagnetic coil 32, magnet assembly 40, permanent magnet 41, swing arm 42, dial plate 50, dial plate body 51, swing arm slot 52, dial slot 53, avoidance opening 54, main electrical connection assembly 60, main static spring assembly 61, main static spring piece 611, main static contact 612, groove 613, main moving spring assembly 62, main moving spring piece 621, main moving contact 622, main spring piece 623, main abutting wall 6231, main arc surface 6232, sub-electrical connection assembly 70, sub-static spring assembly 71, sub-moving spring assembly 72, sub-moving spring piece 721, sub-moving contact 722, sub-spring piece 723, sub-abutting wall 7231, sub-arc surface 7232. Detailed implementation manners

[0027] The following further elaborates on specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein does not limit the protection scope of the present invention.

[0028] As Figures 1 to 10 shown, it is a schematic structural diagram of a relay provided by the present invention that is conducive to improving stability. The relay conducive to improving stability includes a main housing 10, at least one sub-housing 20 inserted on one side of the main housing 10, a coil assembly 30 disposed in the main housing 10, a magnet assembly 40 disposed on one side of the coil assembly 30, a dial plate 50 connected to one end of the magnet assembly 40, a set of main electrical connection assemblies 60 disposed on the side of the main housing 10 away from the coil assembly 30, and a set of sub-electrical connection assemblies 70 disposed in the sub-housing 20. It can be envisioned that the relay conducive to improving stability also includes some other functional structures, such as connection terminals, shims, etc., which are well-known technologies to those skilled in the art and will not be elaborated herein.

[0029] The main housing 10 includes a main base 11 and a main cover 12 covering the main base 11. The main base 11 and the main cover 12 are interlocked to protect each other. The main base 11 is provided with a coil mounting portion 13 near one side, a magnetic steel mounting portion 14 provided on one side of the coil mounting portion 13, a main electrical connection portion 15 provided on one side of the magnetic steel mounting portion 14, and a main sliding groove 16 provided on one side of the magnetic steel mounting portion 14 and the main electrical connection portion 15. The coil mounting portion 13 is used to mount the coil assembly 30, the magnetic steel mounting portion 14 is used to mount the magnetic steel assembly 40, and the main electrical connection portion 15 is used for the main electrical connection assembly 60. The main sliding groove 16 is used to accommodate the paddle 50 and provide a range of motion, and connect the magnetic steel mounting portion 14 and the main electrical connection portion 15. The end of the main sliding groove 16 facing the auxiliary housing 20 is open. Since the coil assembly 30 and the magnetic steel assembly 40 are existing technologies, the structure and shape parameters of the coil mounting portion 13 and the magnetic steel mounting portion 14 can be set according to actual needs and will not be described in detail here.

[0030] The main electrical connection portion 15 includes a main accommodating groove 151 , a main partition 152 disposed in the main accommodating groove 151 , a main elastic sheet base 153 disposed on the main partition 152 , and a main elastic sheet abutting block 154 disposed on the side wall of the main elastic sheet base 153 .

[0031] The main receiving groove 151 is used to accommodate the main electrical connection component 60. The length of the main receiving groove 151 is greater than the length of the main electrical connection component 60. A fixing groove 155 is provided at one end of the main receiving groove 151 away from the main sliding groove 16, and the fixing groove 155 is used to embed and fix the main electrical connection component 60, providing a fulcrum for the main electrical connection component 60 so that the other end thereof can be used in conjunction with the dial plate 50. The main partition plate 152 is used to separate the main receiving groove 151 from the coil assembly 30 and the magnetic steel assembly 40, so as to prevent the main electrical connection component 60 from affecting the coil assembly 30 and the magnetic steel assembly 40 after being energized.

[0032] The main spring plate base 153 is designed to be arc-shaped so as to better fit the spring plate described below, which will be described below in conjunction with the main electrical connection assembly 60 .

[0033] The profile of the main shrapnel base 153 is arc-shaped so as to better fit the arc-shaped surface of the shrapnel described below. The center angle of the main shrapnel base 153 is greater than 70 degrees and less than 90 degrees. In this embodiment, the center angle of the main shrapnel base 153 is 78 degrees. This is determined by the structure and working principle of the main shrapnel 623 described below, which will be described in detail below.

[0034] The main shrapnel abutting block 154 and the main shrapnel base 153 are arranged on the same side wall of the main accommodating groove 151, and they cooperate with each other to limit the movement range of the shrapnel.

[0035] On the end face of the main base 11 facing the sub-housing 20, two insertion slots 17 are arranged at intervals, and two limit blocks 18 are respectively arranged on one side of the insertion slots 17 close to the main cover plate 12. The insertion slots 17 are used to connect the sub-housing 20, and the limit blocks 18 can prevent the sub-housing 20 from being misaligned when inserted into the insertion slots 17. Both of the two insertion slots 17 are T-shaped slots, so as to achieve fixation in four directions, so that after the sub-housing 20 is inserted and fixed with the insertion slots 17, it can only move along the insertion direction of the insertion slots 17.

[0036] The limit blocks 18 are arranged at one end of the two insertion slots 17 close to the opening of the main electrical connection part 15, and are used for rapid positioning during the insertion and assembly.

[0037] The sub-housing 20 includes a sub-base 21 and a sub-cover plate 22 covering the sub-base 21. The sub-base 21 and the sub-cover plate 22 are buckled with each other to play a protective role.

[0038] A sub-expansion part 23 is arranged in the sub-base 21. The structure of the sub-expansion part 23 is the same as that of the main electrical connection part 15, and it includes a sub-accommodating groove 231, a sub-shrapnel base 232, and a sub-shrapnel slot 233. The sub-accommodating groove 231 is used to accommodate the sub-electrical connection assembly 70. And because the structure of the sub-expansion part 23 is the same as that of the main electrical connection part 15, the above structure will not be described in detail.

[0039] A sub-sliding groove 24 is arranged on one side of the sub-expansion part 23 close to the main sliding groove 16. The sub-sliding groove 24 is communicated with the main sliding groove 16, so that the dial plate 50 can be connected to the main electrical connection part 15 and the sub-expansion part 23 at the same time.

[0040] On one side end face of the sub-housing 20 facing the main base 11, two plug-in blocks 25 are arranged at intervals. The two plug-in blocks 25 are arranged on the sub-base 21, and the number of the plug-in blocks 25 is the same as that of the plug-in slots 17, so that each plug-in block 25 can correspond to each plug-in slot 17. The outer contours of the two plug-in blocks 25 are the same as the inner contours of the plug-in slots 17, and the height dimensions are also the same. The two plug-in blocks 25 are inserted and fixed corresponding to the two plug-in slots 17 until one end of the plug-in block 25 abuts against the limiting block 18, then the splicing of the sub-housing 20 and the main housing 10 can be completed. It can be imagined that the plug-in slots 17 can also be arranged on the end face of the sub-base 21 facing away from the main base 11, so as to further increase the expandability. Preferably, the plug-in block 25 and the plug-in slot 17 are in a tightly matching relationship in terms of size design, so that no additional fixing parts are required to fix the sub-housing 20 after assembly.

[0041] The coil assembly 30 includes a coil bobbin 31 arranged in the coil mounting portion 13 and an electromagnetic coil 32 wound around the coil bobbin 31. After the electromagnetic coil 32 is energized, an S pole and an N pole will be generated at the two end portions of its length respectively, and interact with the magnet assembly 40 to drive it to swing reciprocally. The coil assembly 30 itself is a prior art and will not be elaborated here.

[0042] The magnet assembly 40 includes a permanent magnet 41 rotatably arranged in the magnet mounting portion 14 and a swing arm 42 facing the dial 50. The two ends of the length of the permanent magnet 41 respectively have a fixed S pole and an N pole. When the electromagnetic coil 32 is energized, the operator can adjust the direction of the current according to the needs, so as to change the pole directions (i.e., the S pole and the N pole) of the two end portions of the electromagnetic coil 32, and generate an attracting or repelling effect with the S pole and the N pole of the permanent magnet 41 itself to drive the permanent magnet 41 to swing. When the permanent magnet 41 swings, it will drive the swing arm 42 to swing together, and then drive the dial 50 to move reciprocally along the main sliding groove 16 and the sub-sliding groove 24, so as to realize the opening and closing of the relay. The magnet assembly 40 itself is a prior art and will not be elaborated here.

[0043] Please refer to Figure 5 , the dial 50 includes a dial body 51 inserted into the main sliding groove 16, a swing arm slot 52 arranged at one end of the dial body 51, two dial slots 53 arranged at intervals at the two ends of the dial body 51, and an avoidance opening 54 arranged between the two dial slots 53.

[0044] The swing arm slot 52 is snap-connected to the swing arm 42, so that the permanent magnet 41 can drive the slide of the dial body 51. The two dial slots 53 are respectively used for snap-connecting the main electrical connection component 60 and the auxiliary electrical connection component 70. And when the number of the auxiliary electrical connection components 70 increases, the number of the dial slots 53 also increases correspondingly. The avoidance opening 54 can reduce the weight of the dial body 51, reduce the contact area with the main sliding slot 16 and the auxiliary sliding slot 24, reduce the frictional resistance, so as to reduce the force required for the permanent magnet 41 to drive the dial body 51.

[0045] The main electrical connection component 60 includes a main static spring component 61 disposed in the main accommodation groove 151, and a main moving spring component 62 with one end fixedly disposed in the main accommodation groove 151.

[0046] The main static spring component 61 includes a main static spring piece 611 with one end fixedly disposed on the side wall of the main accommodation groove 151, and at least one main static contact 612 disposed on the main static spring piece 611. One end of the main static spring piece 611 extends outside the main base 11 to connect to an external device. Please refer to Figure 6 , a groove 613 is provided on the main static contact 612, and the two side walls of the groove 613 are inclined outward and are arc-shaped to increase the area when contacting the main static contact 612.

[0047] The main moving spring component 62 includes a main moving spring piece 621 with one end fixedly disposed in the main accommodation groove 151, at least one main moving contact 622 disposed on the free end of the main moving spring piece 621, and a main spring piece 623 disposed in the main spring piece base 153.

[0048] One end of the main moving spring piece 621 is fixedly disposed in the fixed slot 155, and the other end is snap-connected to the dial slot 53. As the dial 50 slides, the main moving spring piece 621 deforms elastically by itself.

[0049] Please refer to Figure 7 , the end face of the main moving contact 622 is a spherical surface. When the main moving contact 622 abuts against the main static contact 612, the contact between the main moving contact 622 and the main static contact 612 changes from single-point contact to multi-point contact, so that the contact between the main moving contact 622 and the main static contact 612 is more stable after abutment. The free end of the main moving spring piece 621 is snap-connected to the dial slot 53. The number of the main static contacts 612 is the same as that of the main moving contacts 622 to ensure that they can abut against each other.

[0050] The elastic force direction of the main elastic piece 623 is consistent with the arrangement direction of the active contact 622 and the main static contact 612, and is used to provide an additional thrust for the bonding force between the active contact 622 and the main static contact 612. Since the magnetic latching relay is an expandable structure, when multiple sub-electrical connection components 70 are loaded, it may cause insufficient thrust provided by the dial plate 50, resulting in a virtual connection between the active contact 622 and the main static contact 612. Therefore, the main elastic piece 623 is required to provide sufficient holding force.

[0051] One end of the main elastic piece 623 is placed towards the active contact 622, and the other end is accommodated between the main elastic piece base 153 and the main elastic piece abutting block 154. The main elastic piece 623 is of a U-shaped structure and includes two main abutting walls 6231 and a main arc surface 6232 connecting the two main abutting walls 6231. Please refer to Figure 10 , the main arc surface 6232 is placed on the main elastic piece base 153. One main abutting wall 6231 of the main elastic piece 623 abuts against the active spring piece 621, and the other main abutting wall 6231 is accommodated between the main elastic piece base 153 and the main elastic piece abutting block 154.

[0052] In the direction of the elastic force perpendicular to the two main abutting walls 6231, the maximum length of the main elastic piece 623 is less than the maximum distance between the main elastic piece base 153 and the main elastic piece abutting block 154, so that the main abutting walls 6231 can move within a limited range.

[0053] In order to extend the service life of the main elastic piece 623, the main elastic piece 623 is movable rather than fixed. Because if the main elastic piece 623 is fixed, the two main abutting walls 6231 will bend and deform around a baseline, which will cause the service life of the main elastic piece 623 to decrease. Therefore, the main elastic piece 623 cannot be fixed and it moves within a limited range.

[0054] When the active contact 622 and the main static contact 612 are disconnected, the main elastic piece 623 is compressed, and the two main abutting walls 6231 of the main elastic piece 623 come together, and there is an acute angle between the two main abutting walls 6231. At this time, the main elastic piece 623 will become longer in the direction of the elastic force perpendicular to the two main abutting walls 6231 and will slide towards the direction of the main elastic piece base 153. At this time, the main arc surface 6232 is placed on the main elastic piece base 153.

[0055] When the active contact 622 and the main static contact 612 are in contact and powered on, the two main abutting walls 6231 of the main elastic piece 623 will open, and there is an obtuse angle between the two main abutting walls 6231. At this time, the main elastic piece 623 will become shorter in the direction of the elastic force perpendicular to the two main abutting walls 6231. At the same time, due to the elastic potential energy of the main elastic piece 623 itself, the main elastic piece 623 will move in a direction away from the main elastic piece base 153. At this time, the end of the main abutting wall 6231 abuts against the main elastic piece abutting block 154, so that the main elastic piece 623 moves back and forth between the main elastic piece base 153 and the main elastic piece abutting block 154. And when the main abutting wall 6231 abuts against the active contact 622, the stability after the active contact 622 and the main static contact 612 are in contact can be increased, and the anti-arc repulsion ability can be improved.

[0056] The secondary electrical connection assembly 70 includes a secondary static spring assembly 71 fixedly arranged on the side wall of the secondary accommodation groove 231, and a secondary moving spring assembly 72 with one end fixedly arranged in the secondary accommodation groove 231.

[0057] The secondary static spring assembly 71 includes a secondary static spring piece 711 with one end fixedly arranged on the side wall of the secondary accommodation groove 231, and at least one secondary static contact 712 arranged on the secondary static spring piece 711. Preferably, the structure of the secondary static spring assembly 71 is the same as that of the main static spring assembly 61, which is convenient for assembly and replacement.

[0058] The structure of the secondary moving spring assembly 72 is the same as that of the active spring assembly 62, and the achieved technical effects are also the same as those of the active spring assembly 62. It includes a secondary moving spring piece 721, a secondary moving contact 722, and a secondary elastic piece 723. Preferably, the secondary elastic piece 723 has the same structure as the main elastic piece 623, and it includes two secondary abutting walls 7231 and a secondary arc surface 7232 connecting the two secondary abutting walls 7231.

[0059] The free end of the secondary moving spring piece 721 is clamped in the dial groove 53. The structure of the secondary static contact 712 is exactly the same as that of the main static contact 612, and the secondary moving contact 722 is exactly the same as the active contact 622 to save costs.

[0060] During use, insert the two plug-in blocks 25 into the plug-in slot 17, then clamp the secondary moving spring piece 721 into the dial groove 53, and finally cover the main cover plate 12 and the secondary cover plate 22 to complete the expansion. The main elastic piece 623 and the secondary elastic piece 723 can provide a boosting force, thereby reducing the force required for the permanent magnet 41 to drive the dial plate 50 to directly combine the contacts, and ensuring that the permanent magnet 41 still has sufficient thrust after expansion.

[0061] Compared with the prior art, a relay provided by the present invention, which is beneficial to improving stability, is provided with two insertion slots 17 spaced apart on the end surface of the main base 11 facing the sub-housing 20, and two limiting blocks 18 arranged at the end of the insertion slot 17 close to the main cover plate 12. A sub-sliding slot 24 is arranged on one side of the sub-base 21 close to the main sliding slot 16. The sub-sliding slot 24 communicates with the main sliding slot 16, so that the dial plate 50 can be connected to the main electrical connection part 15 and the sub-expansion part 23 at the same time. Two insertion blocks 25 are spaced apart on the end surface of the sub-base 21 facing the main base 11. The two insertion blocks 25 are inserted and fixed corresponding to the two insertion slots 17 until one end of the insertion block 25 abuts against the limiting block 18, then the splicing of the sub-housing 20 and the main housing 10 can be completed, and the expansion is convenient. A main elastic piece 623 and a sub-elastic piece 723 are respectively arranged on the main accommodation groove 151 and the sub-accommodation groove 231, reducing the thrust requirement on the permanent magnet 41 when the contacts are closed, so that the relay has better bonding stability between the contacts after modular expansion.

[0062] The above are only the preferred embodiments of the present invention, and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are all covered by the claims of the present invention.

Claims

1. A relay that is beneficial to improving stability, characterized in that: The relay beneficial to improving stability includes a main housing, at least one sub-housing plugged on one side of the main housing, and a set of main electrical connection components arranged in the main housing. The main housing includes a main base, the main base includes a main electrical connection part, two plug slots are arranged at intervals on the end face of the main base facing the sub-housing, two plug blocks are arranged at intervals on the side end face of the sub-housing facing the main base, the number of the plug blocks is the same as that of the plug slots and they are plugged and fixed to each other. The main electrical connection part includes a main accommodation slot, a main partition arranged in the main accommodation slot, a main spring base arranged on the main partition, and a main spring abutting block arranged on the side wall of the main spring base. The main electrical connection components include a main static contact assembly arranged in the main accommodation slot, and a main moving contact assembly with one end fixedly arranged in the main accommodation slot. The main static contact assembly includes a main static contact. The main moving contact assembly includes a main moving spring piece with one end fixedly arranged in the main accommodation slot, at least one main moving contact arranged on the free end of the main moving spring piece, and a main spring arranged in the main spring base. The main spring is of a U-shaped structure and includes two main abutting walls, and a main arc surface connecting the two main abutting walls. One main abutting wall of the main spring abuts against the main moving spring piece, and the other main abutting wall is accommodated between the main spring base and the main spring abutting block. Along the elastic force direction perpendicular to the two main abutting walls, the maximum length of the main spring is less than the maximum distance between the main spring base and the main spring abutting block. The main arc surface faces the main spring base. When the main moving contact and the main static contact are disconnected, the main spring is compressed, the two main abutting walls of the main spring close together, and there is an acute angle between the two main abutting walls and the main arc surface abuts against the main spring base. When the main moving contact and the main static contact are abutted and powered on, the two main abutting walls of the main spring open, and there is an obtuse angle between the two main abutting walls and the end of the main abutting wall abuts against the main spring abutting block.

2. The relay according to claim 1, which is beneficial to improving stability, is characterized in that: The outline of the main spring base is arc-shaped.

3. The relay according to claim 1, which is beneficial to improving stability, is characterized in that: A coil assembly, a magnet assembly arranged on one side of the coil assembly, and a dial plate with one end connected to the magnet assembly are also arranged in the main housing.

4. The relay conducive to improving stability according to claim 3, characterized in that: The dial plate includes a dial plate body, a swing arm card slot arranged at one end of the dial plate body, two dial piece slots arranged at intervals at both ends of the dial plate body, and an avoidance opening arranged between the two dial piece slots.

5. The relay according to claim 1, which is beneficial to improving stability, is characterized in that: A main cover plate is covered on the main base. A coil installation part is arranged near one side edge in the main base, a magnet installation part is arranged on one side of the coil installation part, and a main sliding slot is arranged on one side of the magnet installation part and the main electrical connection part. The main electrical connection part is arranged on one side of the magnet installation part.

6. The relay according to claim 1, which is beneficial to improving stability, is characterized in that: The secondary housing includes a secondary base, and a secondary cover plate covering the secondary base. A secondary expansion part is arranged in the secondary base. The secondary expansion part includes a secondary accommodation groove, a secondary elastic piece base arranged on one side of the secondary accommodation groove close to the main housing, and a secondary elastic piece slot arranged on the side wall of the secondary elastic piece base.

7. The relay according to claim 6, which is beneficial to improving stability, is characterized in that: A secondary electrical connection component is accommodated in the secondary housing. The secondary electrical connection component includes a secondary static spring component fixedly arranged on the side wall of the secondary accommodation groove, and a secondary moving spring component with one end fixedly arranged in the secondary accommodation groove.

8. The relay for improving stability according to claim 7, characterized in that: The secondary static spring component includes a secondary static spring piece, and at least one secondary static contact arranged on the secondary static spring piece.

9. The relay according to claim 7, which is beneficial to improving stability, is characterized in that: The secondary moving spring component includes a secondary moving spring piece, at least one secondary moving contact arranged on the free end of the secondary moving spring piece, and a secondary elastic piece arranged in the secondary elastic piece base.

10. The relay according to claim 1, which is beneficial to improving stability, is characterized in that: A groove is arranged on the main static contact. The two side walls of the groove are inclined outwards and are arc-shaped surfaces. The end face of the main moving contact is a spherical surface. When the main moving contact abuts against the main static contact, the contact between the main moving contact and the main static contact expands from single-point contact to multi-point contact.

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