A moving spring assembly, contact system and electromagnetic relay for a relay

Abstract

A moving spring assembly, a contact system and an electromagnetic relay of a relay, comprising a moving spring leaf and a moving spring support, one end of the moving spring support being connected to the opposite end of the moving spring leaf, characterized in that the other end of the moving spring support extends along the length direction of the moving spring leaf to between the two ends of the moving spring leaf and is provided with a leading-out part, the leading-out part being located between the two ends of the moving spring leaf and extending from the side of the moving spring support along a direction perpendicular to the length direction of the moving spring leaf, and a first bending part being further provided between the two ends of the moving spring support, the first bending part and the leading-out part and the moving spring leaf surrounding a first annular structure. The present application can maximize the use of space, ensure the current-carrying area of the leading-out part, reduce the product volume and reduce the temperature rise of the leading-out part.

Description

Technical Field

[0001] This invention relates to the field of relays, and in particular to a relay spring assembly, contact system, and electromagnetic relay. Background Technology

[0002] As home appliances, power supplies and other products become increasingly miniaturized and intelligent, the size requirements for their internal electronic components are also getting smaller. As a type of control switching element, electromagnetic relays will be a future development trend with small size and high load capacity. In the field of soft start power supplies, products are required to be small in size but able to carry a large current and meet short-circuit current requirements.

[0003] Existing relays typically include a base, magnetic circuit system, push card, and contact system. As relay size decreases, higher demands are placed on the internal magnetic circuit and contact systems. On one hand, the reduced size restricts the volume of the magnetic circuit system, thus decreasing the product's attractive force, potentially leading to situations where the product fails to engage or requires a high engagement voltage. On the other hand, with the contact system shrinking, matching the attractive force characteristics of the magnetic circuit system requires further optimization of the contact system's flexibility, while simultaneously ensuring that the current-carrying capacity of the springs meets requirements.

[0004] Currently, relay contact systems typically include a moving spring assembly and a stationary spring assembly. The moving spring assembly usually includes a moving spring plate and a moving spring bracket. The moving spring plate is connected to the moving spring bracket, which has an extension piece. Typically, the extension piece extends from the end of the moving spring bracket along its length, increasing the overall length and height to allow space for surrounding components. Furthermore, the width of the extension piece must be reduced to accommodate the push-lock mechanism, thus sacrificing current-carrying capacity. Additionally, placing the extension piece and the moving contact on the same side leads to increased temperature of the extension piece and significantly impacts the plastic push-lock mechanism. Summary of the Invention

[0005] The main objective of this invention is to overcome the aforementioned defects in existing spring assemblies and to propose a spring assembly for a relay and an electromagnetic relay that can maximize space utilization, ensure the current-carrying area of ​​the spring support lead-out section, reduce product volume, and lower the temperature rise of the spring support lead-out section.

[0006] The present invention adopts the following technical solution:

[0007] A spring assembly for a relay includes a spring plate and a spring bracket, one end of which is connected to the opposite end of the spring plate. The spring bracket is characterized in that the other end extends along the length of the spring plate and has a lead-out portion. The lead-out portion is located between the two ends of the spring plate and extends from the side of the spring bracket along a direction perpendicular to the length of the spring plate. A first bending portion is also provided between the two ends of the spring bracket, and the first bending portion, the lead-out portion, and the spring plate form a first annular structure.

[0008] The first bending portion includes a first bending segment and a second bending segment connected together. The first bending segment extends from one end of the moving spring bracket along the length direction perpendicular to the moving spring sheet. The second bending segment extends from the end of the first bending segment along the length direction of the moving spring sheet to a position close to the middle of the moving spring sheet. The lead-out portion extends from the side of the second bending segment and then extends along the length direction perpendicular to the moving spring sheet.

[0009] The movable spring includes a movable contact, a first movable spring, and a second movable spring. The first movable spring and the second movable spring are arranged overlappingly, and one of the opposite ends of the first movable spring and the second movable spring is connected to one end of the movable spring bracket. The movable contact is fixedly disposed at the other opposite end of the first movable spring and the second movable spring.

[0010] A third bending section is provided between the two ends of the first movable spring and between the two ends of the second movable spring, and there is a gap between the two third bending sections of the overlapping first and second movable springs; there is a gap between the first bending portion and the third bending section.

[0011] A relay contact system includes a stationary spring assembly and a moving spring assembly. The stationary spring assembly has a stationary spring plate and a stationary contact. The stationary contact is disposed on the stationary spring plate. The stationary spring plate has a stationary spring lead-out portion on its side in the width direction of the base. The moving spring assembly adopts the moving spring assembly of the relay described above. A second annular structure is formed between the stationary spring assembly, the moving spring plate, and the lead-out portion of the moving spring support. When a short-circuit current passes through, the first annular structure and the second annular structure respectively generate a first electro-repulsive force and a second electro-repulsive force acting on the moving spring plate in opposite directions.

[0012] An electromagnetic relay includes a base, a contact system, a push card, and a magnetic circuit system, wherein the contact system and the magnetic circuit system are located within the base, and the push card is connected between the magnetic circuit system and the contact system, characterized in that: the contact system adopts the contact system of the aforementioned relay.

[0013] Preferably, the base has a first cavity and a second cavity; the first cavity has an opening at the top, and the magnetic circuit system is located inside the first cavity; the second cavity has an opening on one side in the width direction, and the contact system is horizontally arranged inside the second cavity and located below the magnetic circuit system; the lead-out portion of the moving spring bracket is led out from the opening side in the width direction of the second cavity; the push clamp is positioned in the second cavity and is located on the same side of the magnetic circuit system and the contact system.

[0014] Preferably, the second cavity has two first mounting slots spaced apart in the horizontal direction on the side wall adjacent to the first cavity, and the two first mounting slots are located below the first cavity. The two ends of the moving spring bracket are respectively connected to the two first mounting slots. The second cavity has a second mounting slot on the side wall not adjacent to the first cavity, and the second mounting slot is located below the end of the moving spring that is connected to the push card. The stationary spring assembly is installed in the second mounting slot.

[0015] Preferably, the magnetic circuit system includes a coil frame, an iron core, a first yoke, a second yoke, a compression spring, and an armature; the iron core is inserted into the coil frame and is horizontally arranged; the first yoke is connected to one end of the iron core; the armature is located above the coil frame and is arranged along the length of the coil frame, with one end of the armature facing the blade of the first yoke; the compression spring is connected between the first yoke and the armature to allow one end of the armature to be rotatably positioned at the blade of the first yoke; the second yoke is connected to the other end of the iron core and has a second bent portion extending along the length of the coil frame, the second bent portion being located between the coil frame and the armature and having a pole face facing the armature.

[0016] Preferably, the coil frame includes baffles at both ends along the length direction, a winding window between the two end baffles, and mounting holes extending through the two end baffles along the length direction; wherein at least two coil leads are connected to one of the baffles; enameled wire is wound on the winding window; and the iron core passes through the mounting holes.

[0017] Preferably, one of the baffles is provided with a protruding plug block, the plug block is provided with at least two slots, one end of the coil lead is plugged into the corresponding slot; the end of the first yoke facing away from the armature is opposite to the top of the plug block.

[0018] Preferably, the coil lead includes a lead, a connecting part, an insert part, and a winding head; the connecting part is connected to one end of the lead; the insert part is connected to the side of the connecting part opposite to the lead; the winding head is connected to the side of the connecting part where the lead is located for winding enameled wire, and the winding head with the enameled wire formed an angle with the lead to facilitate soldering, and the tinned winding head can be re-plated until it is on the same plane as the lead.

[0019] Preferably, the sidewalls at both ends of the first cavity width direction are respectively provided with first positioning grooves, the first positioning grooves are opposite to the first yoke, and the first yoke is respectively provided with first bosses at both ends of the first cavity width direction, the first bosses are engaged with the corresponding first positioning grooves to achieve positioning; the sidewalls at both ends of the first cavity width direction are respectively provided with second positioning grooves, the second positioning grooves are opposite to the second yoke, and the second yoke is respectively provided with second bosses at both ends of the second cavity width direction, the second bosses are engaged with the corresponding second positioning grooves to achieve positioning.

[0020] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In this invention, a first bending portion is provided between the two ends of the moving spring bracket. The first bending portion, the lead-out portion, and the moving spring plate form a first annular structure. The stationary spring assembly, the moving spring plate, and the lead-out plate form a second annular structure. When a short-circuit current passes through, the second annular structure generates an electric repulsive force that repels the moving and stationary contacts. The electric repulsive force generated by the first annular structure when a short-circuit current passes through is opposite in direction to the electric repulsive force generated by the second annular structure, thereby weakening the electric repulsive force generated by the second annular structure and improving the short-circuit current resistance.

[0022] 2. In this invention, the lead-out portion of the moving spring assembly is located between the two ends of the moving spring and extends from the side of the moving spring bracket along the direction perpendicular to the length of the moving spring. This maximizes the use of space, ensures the current-carrying area of ​​the lead-out portion, and the lead-out portion is far away from the heating part of the moving contact end, which can reduce the temperature rise.

[0023] 3. In this invention, the first bent portion of the movable spring includes a first bent segment and a second bent segment connected together. The lead-out portion extends from the side of the second bent segment and then extends along the direction perpendicular to the length of the movable spring. Thus, a ring-shaped spatial three-dimensional structure can be formed between the first bent segment, the second bent end, and the lead-out portion, resulting in a compact structure. The movable spring includes a first movable spring and a second movable spring that are stacked, which can increase the current-carrying area. A third bent segment is provided between the two ends of the first movable spring and between the two ends of the second movable spring. There is a gap between the two third bent segments, so that the two movable springs will not jam during operation. At the same time, the flexibility of the movable spring is improved, which is beneficial to reducing the length of the movable spring and thus reducing the product volume.

[0024] 4. In this invention, the magnetic circuit system includes a coil frame, an iron core, a first yoke, a second yoke, a compression spring, and an armature. The first yoke is connected to one end of the iron core. The compression spring is connected between the first yoke and the armature so that one end of the armature is rotatably positioned at the blade edge of the first yoke. The armature is arranged along the length of the coil frame. The second yoke is connected to the other end of the iron core and has a second bend. The second bend extends along the length of the coil frame and has a pole face opposite to the armature. Two yokes are located at both ends of the iron core, and the second yoke is L-shaped. While maintaining a small size, the pole face area can be larger, thereby improving the attractive force of the product.

[0025] 5. In this invention, the cross-section of the iron core is rectangular, and its dimension along the width direction of the first cavity is smaller than its dimension along the height direction of the first cavity. That is, the dimension of the iron core in the width direction is small, realizing the narrow body size of the relay and reducing the volume. The two ends of the iron core are riveted or welded to the first yoke and the second yoke through protrusions. The first yoke and the second yoke are respectively provided with a first protrusion and a second protrusion. The first protrusion and the second protrusion are riveted or welded to the compression spring, making the connection more stable and the process simple.

[0026] 6. In this invention, the base is divided into a first cavity and a second cavity arranged vertically, so that the magnetic circuit system and the contact system are correspondingly distributed vertically, and the isolation between the first cavity and the second cavity is good and the creepage distance is large; the push card is set on the same side of the magnetic circuit system and the contact system, making full use of the length and height space of the base, the overall layout is more compact and the structure is more stable.

[0027] 7. In this invention, the coil lead-out component is provided with a connecting part, an insertion part and a winding head. The winding head, which is wrapped with enameled wire, forms an angle with the lead-out foot, which facilitates the tinning operation of the winding head, thereby reducing the heat generated during the tinning process. The heat can also be dissipated through conduction through the lead-out foot, preventing the coil frame from melting and thus ensuring the dimensional stability of the lead-out foot. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the present invention;

[0029] Figure 2 Here is a structural diagram of the movable spring support;

[0030] Figure 3 for Figure 2 The main view;

[0031] Figure 4 This is a structural diagram of the first moving spring;

[0032] Figure 5 This is a structural diagram of the second moving spring;

[0033] Figure 6 This is a structural diagram of the stationary reed;

[0034] Figure 7 This is a schematic diagram of the loop current of the present invention;

[0035] Figure 8 This is a structural diagram of the electromagnetic relay of the present invention;

[0036] Figure 9 for Figure 8 A sectional view;

[0037] Figure 10 This is a structural diagram of the magnetic circuit system of the present invention;

[0038] Figure 11 This is a diagram of the iron core structure;

[0039] Figure 12 This is a diagram of the first yoke structure;

[0040] Figure 13 This is a diagram of the second yoke structure;

[0041] Figure 14 This is a diagram of the armature structure;

[0042] Figure 15 This is a structural diagram of a compression spring;

[0043] Figure 16 To promote the card structure diagram;

[0044] Figure 17 This is a diagram of the base structure.

[0045] Figure 18 Top view of the base;

[0046] Figure 19 Here is a structural diagram of the coil lead-out component;

[0047] Figure 20 This is a structural diagram of the coil frame;

[0048] Figure 21 for Figure 20 A bottom view;

[0049] Figure 22 This is a diagram showing the fit between the coil lead and the coil frame (the winding head and the lead have an angle).

[0050] Figure 23 for Figure 22 The left view;

[0051] Figure 24 for Figure 23 Right view

[0052] Figure 25 Diagram showing the fit between the coil lead and the coil frame (straightening of the winding head);

[0053] Figure 26 for Figure 25 The left view;

[0054] Figure 27 This is a cross-sectional view of the main structure of an electromagnetic relay;

[0055] 10. Base; 11. First cavity; 12. Second cavity; 13. Extension space; 14. First positioning groove; 15. Second positioning groove; 16. First mounting groove; 17. Second mounting groove; 20. Magnetic circuit system; 21. Coil lead-out component; 21a. Lead-out foot; 21b. Connecting part; 21c. Insertion part; 21d. Protrusion; 21e. Winding head; 21f. Recess; 22. Coil frame; 22a. Baffle; 22b. Mounting hole; 22c. Winding window; 22d. Slot; 22e. Insertion block; 22f. Lead groove; 23. Enamelled wire; 24. Iron core; 24a. Protrusion; 25. First yoke; 25a. Knife edge; 25b. First through hole; 25c. First protrusion; 25d. First boss; 26. Armature; 26a. Groove; 26b. First... 27. Compression spring, 27a. Third through hole, 28. Second yoke, 28a. Second bend, 28b. Pole surface, 28c. Second through hole, 28d. Second boss, 30. Pushing clip, 31. Slot, 32. Notch, 33. Connecting hole, 40. Contact system, 41. Stationary spring assembly, 41a. Stationary contact, 41b. Stationary spring, 41c. Stationary spring lead-out, 42. Moving spring assembly, 42a. Moving spring, 42a-1. First moving spring, 42a-2. Second moving spring, 42b. Moving spring support, 42d. Third bend, 42e. Fourth bend, 43. Moving contact, 44. Lead-out, 45. First bend, 45a. First bend, 45b. Second bend, 46. First annular structure, 47. Second annular structure.

[0056] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0057] The present invention will be further described below through specific embodiments.

[0058] In this invention, the terms "first," "second," and "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "front," and "rear" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this invention. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0060] See Figures 1 to 7 A relay spring assembly includes a moving spring 42a and a moving spring bracket 42b. One end of the moving spring bracket 42b is connected to the opposite end of the moving spring 42a. The other end of the moving spring bracket 42b extends along the length of the moving spring 42a to between the two ends of the moving spring 42a and has a lead-out portion 44. The lead-out portion 44 extends from the side of the moving spring bracket 42b along a direction perpendicular to the length of the moving spring 42a. A first bending portion 45 is also provided between the two ends of the moving spring bracket 42b. The first bending portion 45, the lead-out portion 44, and the moving spring 42a form a first annular structure 46. The first annular structure 46 can be an open annular structure, and its projection on a plane parallel to the lead-out portion 44 can be similar to a rectangle.

[0061] One end of the movable spring bracket 42b may be provided with a protrusion for riveting to the opposite end of the movable spring 42a. The first bending portion 45 includes a first bending section 45a and a second bending section 45b connected together. The first bending section 45a extends from one end of the movable spring bracket 42b along the length direction perpendicular to the movable spring 42a. The second bending section 45b extends from the end of the first bending section 45a along the length direction of the movable spring 42a to a position near the middle of the movable spring 42a. The lead-out portion 44 is bent from the side of the second bending section 45b and then led out along the length direction perpendicular to the movable spring 42a. This lead-out portion 44 extends from the middle of the side of the movable spring 42a, which can maximize the use of the internal space of the miniaturized product and does not require reducing the width of the lead-out portion 44, thus ensuring the current carrying area of ​​the lead-out portion 44. If the lead-out portion 44 extends directly from one end of the push card, the clearance for the contact engagement space must be considered, which would increase the product height and hinder miniaturization. Furthermore, by keeping the lead-out portion 44 away from the heating element of the moving contact 43, the temperature rise is dispersed, reducing the temperature rise of the lead-out portion 44 and minimizing its adverse effects on the push card 30. The moving spring bracket 42b of this invention can be divided into two L-shaped sections. One end of the moving spring bracket 42b and the first bent section 45a form the first L-shaped section, and the second bent section 45b and the lead-out portion 44 form the second L-shaped section. The first and second L-shaped sections are joined to form a spatial three-dimensional structure. The ring structure in the spatial three-dimensional structure generates a first electrodynamic repulsive force acting on the moving spring 42a when a short-circuit current passes through, thereby improving the short-circuit current resistance.

[0062] The movable spring 42a of the present invention includes a movable contact 43, a first movable spring 42a-1, and a second movable spring 42a-2. The first movable spring 42a-1 and the second movable spring 42a-2 are planar structures. The first movable spring 42a-1 and the second movable spring 42a-2 can be stacked in the thickness direction, with one end connected to one end of the movable spring support 42b. That is, one opposite end of the first movable spring 42a-1 and the second movable spring 42a-2 is provided with a hole for riveting to the protrusion of the movable spring support 42b. The stacking of the two movable springs can increase the current-carrying area. The movable contact 43 is fixedly disposed at the other opposite end of the first movable spring 42a-1 and the second movable spring 42a-2. The first movable spring 42a-1 and the second movable spring 42a-2 are respectively provided with contact holes for mounting the movable contact 43. Grooves can also be provided around the contact holes. The first moving spring 42a-1 is also provided with a fourth bending section 42e at the other end. The fourth bending section 42e is similar to an L-shape and can be used to connect the push card 30 and limit the push card 30.

[0063] Furthermore, a third bending section 42d is provided between the two ends of the first movable spring 42a-1, and a third bending section 42d is also provided between the two ends of the second movable spring 42a-2. After the first movable spring 42a-1 and the second movable spring 42a-2 are overlapped, there is a gap between the two third bending sections 42d. The third bending sections 42d can be bent in a Z-shape and staggered with each other, that is, the two third bending sections 42d can be spaced in both the horizontal and vertical directions. The third bending section 42d can be located at any position between the two ends of the movable spring 42a, which can avoid jamming, improve the flexibility of the movable spring 42a, and help reduce the length of the movable spring 42a, thereby reducing the product volume.

[0064] In practical applications, the movable spring bracket 42b can be located above the movable spring 42a, and the two third bending sections 42d can be located near the center of the movable spring 42a. The lead-out portion 44 of the movable spring bracket 42b can extend vertically downward from the upper side of the center of the movable spring 42a. A mutually cooperating clearance space can also be provided between the movable spring 42a and the lead-out portion 44. For example, a bend at the top of the lead-out portion 44 reduces the width of the corresponding side of the movable spring 42a, thus making full use of space and reducing product volume. A gap can also be provided between the first bending portion 45 and the third bending section 42d, and this gap is larger than the gap between the two third bending sections 42d.

[0065] Based on this, the present invention also proposes a relay contact system, see [link to relevant documentation]. Figure 7 The invention includes a stationary spring assembly 41 and the aforementioned movable spring assembly. The stationary spring assembly 41 has a stationary spring plate 41b and a stationary contact 41a. The stationary spring plate 41b is a planar structure with a contact hole and a stationary spring lead-out portion 41c. The stationary contact 41a is disposed on the contact hole. A second annular structure 47 is formed between the stationary spring assembly 41, the movable spring plate 42a, and the lead-out portion 44. This second annular structure 47 can be an open annular structure. When a short-circuit current flows through the first annular structure 46 and the second annular structure 47, the ring currents of the first annular structure 46 and the second annular structure 47 can respectively generate corresponding induced magnetic fields. The two induced magnetic fields are in opposite directions, so the electro-repulsive forces generated by the two induced magnetic fields on the movable spring plate 42a are also opposite, thereby improving the short-circuit current withstand capability. Specifically, when a short-circuit current passes through, the first annular structure 46 and the second annular structure 47 respectively generate a first electro-repulsive force and a second electro-repulsive force acting on the movable spring plate 42a in opposite directions. In the diagram, the second electric repulsive force F2 is upward, which will cause the moving contact to repel each other. The first electric repulsive force F1 is downward, which is opposite to the direction of F2. It will weaken the effect of F1, thereby improving the short-circuit withstand capability.

[0066] See Figures 8 to 27The present invention also proposes an electromagnetic relay, including a base 10, a magnetic circuit system 20, a push card 30, and a contact system 40. The base 10 is divided into a first cavity 11 and a second cavity 12, which are arranged vertically. The top of one end of the second cavity 12 is provided with an extension space 13 extending upward to the side of the first cavity 11, that is, the extension space 13 is located outside the side where the second yoke 28 of the first cavity 11 is located. The magnetic circuit system 20 is located in the first cavity 11, and the iron core 24 is arranged horizontally. The armature 26 is located above the coil frame 22. The top of the first cavity 11 is open, and the bottom can be provided with a hole for the coil lead 21 to pass through. The contact system 40 adopts the above-mentioned contact system and is arranged horizontally in the second cavity 12. The side opening in the width direction of the second cavity 12 facilitates the insertion of the contact system 40. The contact system 40 is located below the magnetic circuit system 20, and the top of the extension space 13 of the second cavity 12 is open. The push card 30 is positioned in the extension space 13 of the second cavity 12, that is, the push card 30 is located on the same side of the magnetic circuit system 20 and the contact system 40. One end of the push card 30 is engaged with the other end of the armature 26, and the other end of the push card 30 is connected to the moving spring assembly 42 of the contact system 40.

[0067] The base 10 is divided into a first cavity 11 and a second cavity 12 arranged vertically, so that the magnetic circuit system 20 and the contact system 40 are correspondingly distributed vertically, and the isolation between the first cavity 11 and the second cavity 12 is good, with a large creepage distance. Furthermore, the push card 30 is set on the same side of the magnetic circuit system 20 and the contact system 40, making full use of the length and height space of the base 10, and the overall layout is more compact.

[0068] Furthermore, the second cavity 12 has two first mounting grooves 16 spaced apart horizontally on its adjacent sidewalls to the first cavity 11. These two first mounting grooves 16 are located below the first cavity 11. They can also be spaced apart vertically. The two ends of the moving spring bracket 42b of the contact system 40 are connected to the two first mounting grooves 16 respectively. A second mounting groove 17 is provided on the sidewall of the second cavity 12 that is not adjacent to the first cavity 11. The second mounting groove 17 is located below the end of the moving spring 42a connected to the push card. The lead-out portion 44 of the moving spring bracket 42b extends from the middle of the open side in the width direction of the second cavity 12. The stationary spring assembly 41 is mounted in the second mounting groove 17, and the stationary spring lead-out portion 41c extends from the open side of the base 10 on one side of the stationary spring 41b. The second cavity 12 can also be divided into two parts by a wall near the middle. The two parts are connected, that is, they are not completely separated. The moving spring bracket 42b is located on the left, the stationary spring assembly 41 is located on the right, and the moving spring plate 42a is inserted through the left and right parts.

[0069] The magnetic circuit system of this invention includes a coil frame 22, an iron core 24, a first yoke 25, a second yoke 28, a compression spring 27, and an armature 26. Enamelled wire 23 is wound on the coil frame 22, and the iron core 24 passes through the coil frame 22. The first yoke 25 is connected to one end of the iron core 24. The armature 26 is arranged along the length of the coil frame 22, and one end of the armature 26 is opposite to the blade edge 25a of the first yoke 25. The compression spring 27 is connected between the first yoke 25 and the armature 26 so that one end of the armature 26 is rotatably positioned at the blade edge 25a of the first yoke 25, i.e., one end of the armature 26 can rotate relative to the first yoke 25. The second yoke 28 is connected to the other end of the iron core 24 and has a second bent portion 28a extending along the length of the coil frame 22. The second bent portion 28a is located between the coil frame 22 and the armature 26 and has a pole surface 28b opposite to the armature 26. The second yoke 28 is designed in an L-shape. By setting the second bent portion 28a extending along the length and setting the side of the second bent portion 28a opposite to the armature 26 as the pole surface 28b, the area of ​​the pole surface 28b is larger, thereby improving the suction force of the product.

[0070] The coil frame 22 includes baffles 22a at both ends along its length, a winding window 22c between the two baffles 22a, and mounting holes 22b extending through the baffles 22a along its length. One baffle 22a has a protruding insertion block 22e, to which a coil lead 21 is connected. This insertion block 22e can be located on the side of the baffle 22a opposite to the winding window 22c and protrude outwards. The coil lead 21 extends along the length of the coil frame 22 and away from the armature 26. Enamelled wire 23 is wound around the winding window 22c. The iron core 24 passes through the mounting hole 22b, the size and shape of which are adapted to the size and shape of the iron core 24.

[0071] Furthermore, the iron core 24 has protrusions 24a at both ends, located outside the mounting holes 22b, and situated at the middle of the end of the iron core 24. The first yoke 25 has a first through hole 25b for fixed connection with the protrusion 24a at one end of the iron core 24. The protrusion 24a and the first through hole 25b can be fixed by riveting or welding. The second yoke 28 has a second through hole 28c for fixed connection with the protrusion 24a at the other end of the iron core 24. The protrusion 24a and the second through hole 28c can be fixed by riveting or welding. The shape and size of the protrusion 24a can be adapted to the shape and size of the corresponding first through hole 25b or second through hole 28c.

[0072] In this invention, a plug-in block 22e can be provided on the baffle 22a opposite to the first yoke 25. The plug-in block 22e is used for inserting the coil lead 21. A space for placing the first yoke 25 is formed between the plug-in block 22e and the corresponding side of the baffle 22a. That is, the first yoke 25 stands above the plug-in block 22e, and the end of the first yoke 25 facing away from the armature 26 is opposite to or in contact with the top of the plug-in block 22e, making the structure more compact.

[0073] Furthermore, since the first yoke 25 stands on the side of the coil frame 22, and the armature 26 is arranged along the length of the coil frame 22, an angle is formed between the first yoke 25 and the armature 26. The compression spring 27 can be configured in an L-shape, with one end located on the side of the first yoke 25 facing away from the baffle 22a, and the other end located on the side of the armature 26 facing away from the coil frame 22. The side of the first yoke 25 facing away from the coil frame 22 has at least one first protrusion 25c, and the side of the armature 26 facing away from the coil frame 22 has at least one second protrusion 26b. The end of the compression spring 27 opposite to the first yoke 25 has at least one third through hole 27a for fixed connection with the first protrusion 25c, and the end of the compression spring 27 opposite to the armature 26 has at least one third through hole 27a for fixed connection with the second protrusion 26b. The number of the first protrusion 25c and the second protrusion 26b can be set according to the actual situation. The number and position of the third through hole 27a are set according to the number and position of the first protrusion 25c and the second protrusion 26b. For example, there are 2 first protrusions 25c and 26b, and the third through holes 27a at both ends of the compression spring 27 are set to 2 respectively.

[0074] In this invention, the second yoke 28 is opposite to another baffle 22a, and the second bent portion 28a is located above the baffle 22a. There is a gap between the second bent portion 28a and the enameled wire 23 wound around the winding window 22c. The size of the second bent portion 28a, i.e., the area of ​​the pole face 28b, can be set according to actual needs and is not limited here. When the magnetic circuit system 20 of the present invention is working, when the iron core 24 generates magnetic force, the pole face 28b of the second bent portion 28a of the second yoke 28 attracts the armature 26, and the armature 26 rotates around the knife edge 25a of the first yoke 25 toward the pole face 28b. When the magnetic force of the iron core 24 disappears, the armature 26 leaves the pole face 28b of the second bent portion 28a, that is, the armature 26 rotates around the knife edge 25a of the first yoke 25 toward the pole face 28b, and there is a gap between the armature 26 and the pole face 28b of the second bent portion 28a.

[0075] Furthermore, the iron core 24 has a rectangular cross-section, and its dimension along the width direction of the first cavity 11 is smaller than its dimension along the height direction of the first cavity 11. That is, the iron core 24 is set to be flat and narrow in the width direction, thereby reducing the width dimension of the base 10, thus achieving a narrow body size of the relay and reducing the size of the relay.

[0076] To better position the magnetic circuit system 20 within the first cavity 11, first positioning grooves 14 are provided on the side walls at both ends of the first cavity 11 in the width direction. The first positioning grooves 14 are opposite to the first yoke 25. The first yoke 25 has first bosses 25d at both ends of the first cavity 11 in the width direction. The two first bosses 25d are engaged with the corresponding first positioning grooves 14 to achieve positioning. Second positioning grooves 15 are provided on the side walls at both ends of the first cavity 11 in the width direction. The second positioning grooves 15 are opposite to the second yoke 28. The second yoke 28 has second bosses 28d at both ends of the second cavity 12 in the width direction. The second bosses 28d are engaged with the corresponding second positioning grooves 15 to achieve positioning. The first boss 25d can be located near the top of the first yoke 25, and the second boss 28d can be located near the second bend 28a of the second yoke 28. The first positioning groove 14 and the second positioning groove 15 are located at the top of the first cavity 11 and can extend downward along the top surface of the side wall of the base 10, that is, the top surfaces of the first positioning groove 14 and the second positioning groove 15 are also open.

[0077] Furthermore, the other end of the armature 26, that is, the end opposite to the pusher 30, has two recessed grooves 26a on both sides, which are concave in the width direction. The two grooves 26a can be symmetrically arranged. One end of the pusher 30 has a slot 31 with a notch 32 at the top. During installation, the slot 31 can be opened by a tool, and then the opened slot 31 can be inserted into the two grooves 26a. After the tool is released, the slot 31 is locked onto the two grooves 26a. The other end of the pusher 30 has a connecting hole 33, and the fourth bent section 42e of the moving spring assembly 42 of the contact system 40 is connected to the connecting hole 33.

[0078] In the magnetic circuit system 20 of the present invention, when the iron core 24 generates magnetic force, the pole surface 28b of the bent portion 28a of the armature 26 attracts the armature 26, that is, the armature 26 rotates around the blade edge 25a of the first yoke 25 toward the pole surface 28b, and the armature 26 drives the pusher 30 to move downward, so that the moving contact 43 and the stationary contact 41a are in contact; when the magnetic force of the iron core 24 disappears, the armature 26 leaves the pole surface 28b of the bent portion 28a, that is, the armature 26 rotates around the blade edge 25a of the first yoke 25 toward the pole surface 28b, the pusher 30 moves upward, and the moving contact 43 and the stationary contact 41a separate.

[0079] In this invention, the insertion block 22e of the coil frame 22 is provided with at least two slots 22d, and one end of the coil lead-out member 21 is inserted into the corresponding slot 22d. See also Figures 19-27The coil lead-out component 21 includes a lead-out pin 21a, a connecting portion 21b, an insertion portion 21c, and a winding head 21e. The connecting portion 21b connects the lead-out pin 21a, the insertion portion 21c, and the winding head 21e. The connecting portion 21b is connected to one end of the lead-out pin 21a and may form an angle with the lead-out pin 21a. The winding head 21e is connected to the side of the connecting portion 21b where the lead-out pin 21a is located for winding enameled wire 23. The winding head 21e with the enameled wire 23 wound forms an angle with the lead-out pin 21a to facilitate soldering. After soldering, the winding head 21e can be re-rotated until it is parallel to the lead-out pin 21a. The insertion portion 21c is connected to the other side of the connecting portion 21b; that is, the insertion portion 21c and the lead-out pin 21a are on different sides of the connecting portion 21b, while the winding head 21e and the lead-out pin 21a are on the same side of the connecting portion 21b.

[0080] Among them, see Figure 23 , Figure 24 The winding head 21e is bent to form an angle with the lead 21a, meaning the connecting part 21b, the insertion part 21c, and the lead 21a are on the same plane, while the winding head 21e forms an angle with this plane. This facilitates soldering the winding head 21e, thereby reducing the heat generated during the soldering process. The heat can also be dissipated through conduction via the lead 21a, preventing heat concentration that could cause the coil frame to melt. See also Figure 25 , Figure 26 After tinning, the winding head 21e with enameled wire 23 is straightened to make it parallel to the lead 21a, so that the winding head 21e, the connecting part 21b, the lead 21a end, etc. are all in the same plane. When the winding head 21e with enameled wire 23 is straightened, the enameled wire 23 will have a slack, which can avoid the breakage of the enameled wire 23 caused by impact vibration or pulling of the lead 21a.

[0081] Furthermore, the winding head 21e and the lead-out foot 21a are respectively connected to the two ends on the same side of the connecting part 21b, and there is a gap between the winding head 21e and the lead-out foot 21a. The insertion part 21c is connected to the middle of the other side of the connecting part 21b. This layout can increase the overall strength of the coil lead-out part 21 and improve the stability of the structure.

[0082] Furthermore, the angle between the winding head 21e and the lead-out pin 21a is greater than or equal to 30° and less than or equal to 90°. In practical applications, the angle between the winding head 21e and the lead-out pin 21a or the connecting part 21b can be set according to the actual situation. When the angle between the winding head 21e and the lead-out pin 21a is set to a larger angle, such as 90°, only the winding head 21e is tinned during soldering. The angle between the winding head 21e and the lead-out pin 21a can also be set to a smaller angle, such as 30°, in which case both the winding head 21e and the lead-out pin 21a are tinned together during soldering.

[0083] In addition, the angle between the connecting part 21b and the lead-out pin 21a, and the angle between the connecting part 21b and the insertion part 21c can be set according to the actual situation, and are not limited here.

[0084] Furthermore, the insertion part 21c has a plurality of protrusions 21d on its side, which are spaced apart along the length of the insertion part 21c. The protrusions 21d can be located on the side of the insertion part 21c near the winding head 21e, and the protrusions 21d allow the insertion part 21c to engage securely with the slots 22d on the coil holder 22, resulting in a more stable connection. The winding head 21e has a plurality of recesses 21f on its side, which are spaced apart along the length of the winding head 21e. The recesses 21f can be located on the side of the winding head 21e opposite to the lead-out foot 21a, and the recesses 21f make the connection between the enameled wire 23 and the lead-out foot 21a more stable.

[0085] Furthermore, the baffle 22a with plug-in block 22e is provided with a lead wire groove 22f on the side opposite to the winding window 22c. The lead wire groove 22f is connected to the bottom end of the winding window 22c and the plug-in block 22e, so the enameled wire 23 connected to the winding head 21e and the winding window 22c can be laid along the lead wire groove 22f.

[0086] The coil lead-out member 21 of the present invention has a connecting part 21b, a winding head 21e, a lead-out foot 21a and an insertion part 21c that can be integrally formed solder sheet structure. During installation, after inserting the insertion part 21c into the coil frame 22, the enameled wire 23 is wound on the winding head 21e, and then the winding head 21e with the enameled wire 23 is tinned, and then the tinned winding head 21e is straightened.

[0087] Taking two slots 22d and two coil leads 21 as an example, the two coil leads 21 can be symmetrically arranged along the center line of the plug block 22e perpendicular to the length direction of the coil frame 22, that is, the two winding heads 21e are located on the inner side and the two lead feet 21a are located on the outer side. The winding head 21e with enameled wire 23 is located on the side of the lead foot 21a facing away from the winding window 22c so as to form an angle with the lead foot 21a. Furthermore, since the winding head 21e is in a bent state, the enameled wire 23 connecting the winding head 21e and the winding window 22c can be in a taut state. After the winding head 21e is straightened later, the distance between the two can be reduced, thereby giving the enameled wire 23 a certain amount of slack.

[0088] The present invention is configured such that the winding head 21e and the lead-out pin 21a are at a certain angle. This allows for some slack in the enameled wire 23 when the winding head 21e is wound and then straightened, preventing breakage of the enameled wire 23 caused by electromagnetic relay impact vibration or pulling of the lead-out pin 21a. Furthermore, when the winding head 21e is tinned after winding the enameled wire 23, the heat generated during the tinning process is small because only a portion of the winding head 21e is tinned. This heat can also be dissipated through the lead-out pin 21a, reducing the heat in the insertion part 21c and preventing the coil frame 22 from melting, thus ensuring the dimensional stability of the lead-out pin 21a.

[0089] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A moving spring assembly for a relay, comprising a moving spring plate and a moving spring bracket, wherein one end of the moving spring bracket is connected to the opposite end of the moving spring plate, characterized in that: The other end of the moving spring bracket extends along the length of the moving spring and has an outlet portion. The outlet portion is located between the two ends of the moving spring and extends from the side of the moving spring bracket along the length perpendicular to the moving spring. A first bending portion is also provided between the two ends of the moving spring bracket. The first bending portion, the outlet portion, and the moving spring form a first annular structure. The first annular structure is at least partially located on the side of the moving spring away from the stationary contact that corresponds to it in the relay.

2. The moving spring assembly of a relay as described in claim 1, characterized in that: The first bending portion includes a first bending segment and a second bending segment connected together. The first bending segment extends from one end of the moving spring bracket along the length direction perpendicular to the moving spring sheet. The second bending segment extends from the end of the first bending segment along the length direction of the moving spring sheet to a position close to the middle of the moving spring sheet. The lead-out portion extends from the side of the second bending segment and then extends along the length direction perpendicular to the moving spring sheet.

3. The moving spring assembly of a relay as described in claim 1, characterized in that: The movable spring includes a movable contact, a first movable spring, and a second movable spring. The first movable spring and the second movable spring are arranged overlappingly, and one of the opposite ends of the first movable spring and the second movable spring is connected to one end of the movable spring bracket. The movable contact is fixedly disposed at the other opposite end of the first movable spring and the second movable spring.

4. The moving spring assembly of a relay as described in claim 3, characterized in that: A third bending section is provided between the two ends of the first movable spring and between the two ends of the second movable spring, and there is a gap between the two third bending sections of the overlapping first and second movable springs; there is a gap between the first bending portion and the third bending section.

5. A contact system for a relay, comprising a stationary spring assembly and a moving spring assembly, the stationary spring assembly having a stationary spring plate and a stationary contact, the stationary contact being disposed on the stationary spring plate, and the side of the stationary spring plate having a stationary spring lead-out portion, characterized in that: The moving spring assembly adopts the moving spring assembly of a relay according to any one of claims 1 to 4. A second ring structure is formed between the stationary spring assembly, the moving spring plate and the lead-out portion of the moving spring bracket. When a short-circuit current passes through, the first ring structure and the second ring structure respectively generate a first electric repulsive force and a second electric repulsive force acting on the moving spring plate in opposite directions.

6. An electromagnetic relay, comprising a base, a contact system, a push card, and a magnetic circuit system, wherein the contact system and the magnetic circuit system are located within the base, and the push card is connected between the magnetic circuit system and the contact system, characterized in that: The contact system adopts the contact system of a relay as described in claim 5.

7. An electromagnetic relay as described in claim 6, characterized in that: The base has a first cavity and a second cavity; the first cavity has an opening at the top, and the magnetic circuit system is located inside the first cavity; the second cavity has an opening on one side in the width direction, and the contact system is horizontally arranged inside the second cavity and located below the magnetic circuit system; the lead-out portion of the moving spring bracket is led out from the opening side in the width direction of the second cavity; the push clamp is positioned in the second cavity and is located on the same side of the magnetic circuit system and the contact system.

8. An electromagnetic relay as described in claim 7, characterized in that: The second cavity has two first mounting slots spaced apart in the horizontal direction on the side wall adjacent to the first cavity. The two first mounting slots are located below the first cavity, and the two ends of the moving spring bracket are respectively connected to the two first mounting slots. The second cavity has a second mounting slot on the side wall not adjacent to the first cavity. The second mounting slot is located below the end of the moving spring that is connected to the push card. The stationary spring assembly is installed in the second mounting slot.

9. An electromagnetic relay as described in claim 7, characterized in that: The magnetic circuit system includes a coil frame, an iron core, a first yoke, a second yoke, a compression spring, and an armature. The iron core is inserted into the coil frame and is horizontally arranged. The first yoke is connected to one end of the iron core. The armature is located above the coil frame and is arranged along the length of the coil frame, with one end of the armature facing the blade of the first yoke. The compression spring is connected between the first yoke and the armature to allow one end of the armature to be rotatably positioned at the blade of the first yoke. The second yoke is connected to the other end of the iron core and has a second bend extending along the length of the coil frame. The second bend is located between the coil frame and the armature and has a pole face facing the armature.

10. An electromagnetic relay as described in claim 9, characterized in that: The coil frame includes baffles at both ends along its length, a winding window between the two baffles, and mounting holes extending through the baffles along its length; at least two coil leads are connected to one of the baffles; enameled wire is wound on the winding window; and the iron core passes through the mounting holes.

11. An electromagnetic relay as described in claim 10, characterized in that: One of the baffles is provided with a protruding plug block, the plug block is provided with at least two slots, one end of the coil lead is plugged into the corresponding slot; the end of the first yoke facing away from the armature is opposite to the top of the plug block.

12. An electromagnetic relay as described in claim 10, characterized in that: The coil lead includes a lead, a connecting part, an insert part, and a winding head; the connecting part is connected to one end of the lead; the insert part is connected to the side of the connecting part opposite to the lead; the winding head is connected to the side of the connecting part where the lead is located for winding enameled wire, and the winding head with the enameled wire formed an angle with the lead to facilitate soldering, and the tinned winding head can be re-tinned until it is on the same plane as the lead.

13. An electromagnetic relay as described in claim 9, characterized in that: The sidewalls at both ends of the first cavity width direction are respectively provided with first positioning grooves, the first positioning grooves are opposite to the first yoke, and the first yoke is respectively provided with first bosses at both ends of the first cavity width direction. The first bosses are engaged with the corresponding first positioning grooves to achieve positioning. The sidewalls at both ends of the first cavity width direction are respectively provided with second positioning grooves, the second positioning grooves are opposite to the second yoke, and the second yoke is respectively provided with second bosses at both ends of the second cavity width direction. The second bosses are engaged with the corresponding second positioning grooves to achieve positioning.

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