An ultra-small electromagnetic relay with high voltage breaking capacity

Abstract

The application discloses an ultra-small electromagnetic relay with high voltage breaking capacity, which comprises a base part and a moving spring armature part, the base part comprises a base, a coil assembly and a static spring assembly, the moving spring armature part comprises a moving spring assembly, an armature and a plastic part; the moving spring assembly comprises a first moving spring sheet, a second moving spring sheet and at least one third moving spring sheet, the third moving spring sheet is an independent spring sheet, or the third moving spring sheet is electrically connected with the first moving spring sheet or the second moving spring sheet or adjacent third moving spring sheet or integrally formed; the static spring assembly comprises a first static spring sheet, a second static spring sheet and at least one third static spring sheet, the third static spring sheet is an independent spring sheet, or the third static spring sheet is electrically connected with the first static spring sheet or the second static spring sheet or adjacent third static spring sheet or integrally formed, so that the moving spring assembly and the static spring assembly form at least three groups of contact points in series connection in a closed state. The application utilizes at least three groups of contact points to divide voltage, and thus has strong high voltage breaking capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, in particular to an ultra-small electromagnetic relay with high-voltage breaking capacity. BACKGROUND

[0002] With the rapid development of modern technology, the application of high-voltage direct current is becoming more and more popular and the requirements are becoming higher and higher, and the requirements for relays are becoming more and more stringent. While the switching voltage is continuously increasing, the switching current is also continuously increasing, and the insulation requirement of the resistance between the disconnected contacts is also correspondingly improved. Due to the requirement of miniaturization of the whole machine, the volume requirement of the relay is also getting smaller and smaller. In order to make the relay meet the use requirements of high load, at present, the commonly used solutions include the following several kinds:

[0003] I. Use power relays, high-voltage direct current relays, and power relays with larger load capacity to meet application requirements. However, such relays are large in size and cannot meet the miniaturization requirements of the client, and the cost is also relatively high.

[0004] II. Use third-generation signal relays. Such relays are small in size and belong to the category of ultra-small relays, so they are favored by clients, and such relays have been widely used in high-voltage low-current application scenarios. However, with the continuous increase of voltage and current, the existing such relays gradually cannot meet the requirements. Therefore, some use the method of connecting two such relays in series to increase the number of switching contacts and improve the arc breaking capacity to meet higher load requirements. However, the disadvantage of this method is that the number of relays is large, resulting in a large installation area, inconvenient application for clients, and high cost. SUMMARY

[0005] The present application provides an ultra-small electromagnetic relay with high-voltage breaking capacity, which uses multiple contacts in series inside to improve high-voltage arc breaking capacity and improve load capacity.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a super-mini electromagnetic relay with high voltage breaking capacity, comprising a base part and a moving spring armature part, the base part comprising a base and a coil assembly and a static spring assembly on the base, the moving spring armature part comprising a moving spring assembly, an armature and a plastic part that collects the moving spring assembly and the armature into a whole by injection molding, the moving spring armature part being arranged in a seesaw form on the top of the base part; the static spring assembly comprises a first static spring sheet provided with static contacts and a second static spring sheet provided with static contacts, and the moving spring assembly comprises a first moving spring sheet provided with moving contacts and matched with the first static spring sheet and a second moving spring sheet provided with moving contacts and matched with the second static spring sheet; the moving spring assembly further comprises at least one third moving spring sheet provided with moving contacts, the third moving spring sheet being an independent spring sheet, or the third moving spring sheet being electrically connected with or integrally formed with the first moving spring sheet or the second moving spring sheet or an adjacent third moving spring sheet; the static spring assembly further comprises at least one third static spring sheet provided with static contacts, the third static spring sheet being an independent spring sheet, or the third static spring sheet being electrically connected with or integrally formed with the first static spring sheet or the second static spring sheet or an adjacent third static spring sheet, the third moving spring sheet and the third static spring sheet being matched to make the moving spring assembly and the static spring assembly form at least three groups of contact points connected in series in a closed state.

[0007] Further, the static spring assembly and the moving spring assembly are matched to form a normally open or normally closed contact structure, the number of the third moving spring sheet is one, the third moving spring sheet is electrically connected with or integrally formed with the first moving spring sheet; the number of the third static spring sheet is one, the third static spring sheet is electrically connected with or integrally formed with the second static spring sheet, so that the moving spring assembly and the static spring assembly form three groups of contact points connected in series in a closed state.

[0008] Further, the static spring assembly and the moving spring assembly are matched to form a normally open or normally closed contact structure, the number of the third moving spring sheet is two, one of the third moving spring sheets is electrically connected with or integrally formed with the first moving spring sheet, and the other third moving spring sheet is electrically connected with or integrally formed with the second moving spring sheet; the number of the third static spring sheet is one, the third static spring sheet being an independent spring sheet and being provided with one or two static contacts, the static contacts of the third static spring sheet being matched with the moving contacts of the two third moving spring sheets, so that the moving spring assembly and the static spring assembly form four groups of contact points connected in series in a closed state.

[0009] Further, the static spring assembly and the dynamic spring assembly cooperate to form a conversion type contact structure, the number of the first static spring piece, the second static spring piece, the first dynamic spring piece and the second dynamic spring piece is two respectively, two first dynamic spring pieces are integrally formed or electrically connected, and are switched with two first static spring pieces; two second dynamic spring pieces are integrally formed or electrically connected, and are switched with two second static spring pieces; the number of the third dynamic spring piece is two, and the two third dynamic spring pieces are electrically connected with the two first dynamic spring pieces or integrally formed; the number of the third static spring piece is two, and the two third static spring pieces are electrically connected with the second static spring piece or integrally formed; two third dynamic spring pieces and two third static spring pieces are one-to-one corresponding cooperation.

[0010] Further, the third dynamic spring piece has a height difference and / or a length difference with the first dynamic spring piece and the second dynamic spring piece, and the third static spring piece has a height difference and / or a length difference with the first static spring piece and the second static spring piece.

[0011] Further, one end of the third dynamic spring piece in the length direction is injection molded inside the plastic piece, the other end of the third dynamic spring piece in the length direction is a free end, and a dynamic contact is arranged at the free end; the third dynamic spring piece has a height difference with the armature.

[0012] Further, the third dynamic spring piece is located between the first dynamic spring piece and the second dynamic spring piece, the plastic piece is provided with an insulating part between adjacent dynamic spring pieces, the adjacent dynamic spring pieces are the third dynamic spring piece and the first dynamic spring piece, or the third dynamic spring piece and the second dynamic spring piece, or two adjacent second dynamic spring pieces; the coil assembly comprises a core and a coil wound outside the core, both ends of the core are bent upwards to form two pole surfaces matched with the armature, one end of the core is located between the first static spring piece and the second static spring piece, and the base is provided with an insulating barrier between the one end of the core and the first static spring piece, and between the one end of the core and the second static spring piece.

[0013] Further, the third dynamic spring piece is located between the two ends of the core, the third dynamic spring piece is located below the armature, or the third dynamic spring piece is located on one side of the core in the length direction.

[0014] Further, the first static spring piece is electrically connected or integrally formed with a first lead-out pin, the second dynamic spring piece is electrically connected with a second lead-out pin, or the second static spring piece is electrically connected or integrally formed with a first lead-out pin, the first dynamic spring piece is electrically connected with a second lead-out pin, or the first static spring piece is electrically connected or integrally formed with a first lead-out pin, and the second static spring piece is electrically connected or integrally formed with a second lead-out pin.

[0015] Further, the first and second moving spring plates are respectively provided with welding pieces which are welded with welding platforms provided on the top of the base, and the second lead-out pin is electrically connected with the welding platform or integrally formed with the welding platform; the first and second lead-out pins are located on opposite sides of the base.

[0016] Further, the base is integrally formed with the coil assembly and the static spring assembly by injection molding; the first and second moving spring plates are distributed along the width direction of the base; and a magnetic steel is stacked with the armature or is vertically arranged between the moving spring armature and the coil assembly.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The static spring assembly of the present application further comprises the third static spring plate, and the moving spring assembly further comprises the third moving spring plate, so that the moving spring assembly and the static spring assembly form at least three groups of contact points in series connection in the closed state, and thus the present application can utilize the at least three groups of contact points for voltage division, thereby having strong high-voltage breaking capacity. In addition, when the contact points are in the open state, at least three groups of contact points are opened, and the opened contact points have strong insulation capacity.

[0019] 2. The third moving spring plate has height difference and / or length difference with the first and second moving spring plates, and the third static spring plate has height difference and / or length difference with the first and second static spring plates, so that the present application can ensure the insulation performance between the contact points.

[0020] 3. The provision of the insulation part can ensure the insulation performance between the contact points, and the provision of the insulation barrier wall can increase the creepage distance between the first and second static spring plates and the iron core.

[0021] The present application will be further described in detail in conjunction with the accompanying drawings and embodiments; however, the ultra-small electromagnetic relay with high-voltage breaking capacity of the present application is not limited to the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the three-dimensional structure of the present application of embodiment one (without a shell);

[0023] Figure 2 is a schematic view of the exploded structure of the present application of embodiment one;

[0024] Figure 3 is a schematic view of the three-dimensional structure of the moving spring assembly of the present application of embodiment one in the state that the moving contact points face downward;

[0025] Figure 4 is a schematic view of the three-dimensional structure of the moving spring assembly of the present application of embodiment one in the state that the moving contact points face upward;

[0026] Figure 5 is a perspective view of the static spring assembly of the present invention of embodiment one;

[0027] Figure 6 is a perspective view of the static spring assembly and the dynamic spring assembly in the open state of the present invention of embodiment one;

[0028] Figure 7 is a perspective view of the static spring assembly and the dynamic spring assembly in the closed state of the present invention of embodiment one;

[0029] Figure 8 is a front view of the dynamic spring armature component of the present invention of embodiment one;

[0030] Figure 9 is a side view of the dynamic spring armature component of the present invention of embodiment one;

[0031] Figure 10 is a side view of the static spring component of the present invention of embodiment one;

[0032] Figure 11 is a perspective view of the dynamic spring armature component of the present invention of embodiment one (back side up);

[0033] Figure 12 is a bottom view of the dynamic spring armature component of the present invention of embodiment one;

[0034] Figure 13 is a perspective view of the base component of the present invention of embodiment one;

[0035] Figure 14 is a top view of the base component of the present invention of embodiment one;

[0036] Figure 15 is a perspective view of the dynamic spring armature component and the coil assembly of the present invention of embodiment one;

[0037] Figure 16 is another perspective view of the dynamic spring armature component and the coil assembly of the present invention of embodiment one;

[0038] Figure 17 is a schematic diagram of the internal wiring of the present invention of embodiment one;

[0039] Figure 18 is a schematic diagram of the application wiring at the client end of the present invention of embodiment one;

[0040] Figure 19 is a schematic diagram of the position relationship of the dynamic spring assembly, the static spring assembly and the core of the present invention of embodiment two;

[0041] Figure 20This is a three-dimensional structural schematic diagram of the moving spring assembly of the present invention in Embodiment 3 (moving contact facing upwards);

[0042] Figure 21 This is a bottom view of the moving spring armature component of the present invention in Embodiment 3;

[0043] Figure 22 This is a side view of the moving spring armature component of the present invention in Embodiment 3;

[0044] Figure 23 This is a three-dimensional structural schematic diagram of the static spring assembly of the present invention in Embodiment 3;

[0045] Figure 24 This is a three-dimensional structural schematic diagram of the base component of the present invention in Embodiment 3;

[0046] Figure 25 This is a three-dimensional structural diagram of the moving spring assembly and the stationary spring assembly of the present invention in the disconnected state, according to Embodiment 3.

[0047] Figure 26 This is a three-dimensional structural diagram of the moving spring assembly and the stationary spring assembly of the present invention in the closed state, according to Embodiment 3.

[0048] Figure 27 This is a three-dimensional structural schematic diagram of the present invention (excluding the outer shell) in Embodiment 4;

[0049] Figure 28 This is a three-dimensional structural schematic diagram of the moving spring assembly of the present invention in Embodiment 4;

[0050] Figure 29 This is a three-dimensional structural schematic diagram of the moving spring armature component of the present invention in Embodiment 4;

[0051] Figure 30 This is a schematic diagram of the structure of the moving spring assembly and the stationary spring assembly of the present invention in the mating state in Embodiment 4;

[0052] Figure 31 This is a schematic diagram of the internal wiring of the present invention in Embodiment 4;

[0053] Figure 32 This is a wiring diagram of the application of the present invention on the client side in Embodiment 4;

[0054] Figure 33 This is a schematic diagram of the double-contact structure of the moving spring of the present invention in Embodiment 5. Detailed Implementation

[0055] In the present application, the terms "first", "second", "third" and the like are used only to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description of the present application, "at least one" means one or more than one. "At least three groups" means three groups or more than three groups. "And / or" describes the relationship between the associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone.

[0056] Embodiment one

[0057] Please refer to Figures 1-18 As shown in the figure, the ultra-small electromagnetic relay with high voltage breaking capacity of the present application comprises a base part and a moving spring armature part 2, the base part comprises a base 1 and a coil assembly and a static spring assembly 3 located on the base 1, the moving spring armature part 2 comprises a moving spring assembly, an armature 22 and a plastic part 21 which integrates the moving spring assembly and the armature 22 into a whole by injection molding, and the moving spring armature part 2 is arranged on the top of the base part in the form of a seesaw; the static spring assembly 3 comprises a first static spring piece 31 provided with static contacts and a second static spring piece 32 provided with static contacts, the moving spring assembly comprises a first moving spring piece 23 provided with moving contacts and matched with the first static spring piece 31, and a second moving spring piece 24 provided with moving contacts and matched with the second static spring piece 32, the first moving spring piece 23 and the second moving spring piece 24 are distributed along the width direction of the base 1, and the first moving spring piece 23 and the second moving spring piece 24 are substantially symmetrical and parallel. The moving spring assembly further comprises at least one third moving spring piece 25 provided with moving contacts, the third moving spring piece 25 is an independent spring piece, or the third moving spring piece 25 is electrically connected or integrally formed with the first moving spring piece 23 or the second moving spring piece 24 or adjacent third moving spring pieces 25; the static spring assembly 3 further comprises at least one third static spring piece 33 provided with static contacts, the third static spring piece 33 is an independent spring piece, or the third static spring piece 33 is electrically connected or integrally formed with the first static spring piece 31 or the second static spring piece 32 or adjacent third static spring pieces 33, the third moving spring piece 25 is matched with the third static spring piece 33, so that the moving spring assembly and the static spring assembly 3 form at least three groups of contact points connected in series in the closed state.

[0058] In this embodiment, the static spring assembly 3 and the moving spring assembly form a normally open or normally closed contact structure. As shown in the figure, Figure 3 、 Figure 4 The number of the third moving spring piece 25 is one, the third moving spring piece 25 is electrically connected or integrally formed with the first moving spring piece 23, specifically, the third moving spring piece 25 is integrally formed with the first moving spring piece 23. As shown in the figure, Figure 5As shown, the third static reed 33 is one in number, and is electrically connected with or integrally formed with the second static reed 32. Specifically, the third static reed 33 is integrally formed with the second static reed 32. Thus, the moving reed assembly and the static reed assembly 3 form three groups of contact points in series connection in the closed state, as shown in Figure 6 , Figure 7

[0059] In this embodiment, the third moving reed 25 has a height difference and / or length difference with the first moving reed 23 and the second moving reed 24. Specifically, the length of the third moving reed 25 is shorter than that of the first moving reed 23 / second moving reed 24, and the length difference between them is L1, as shown in Figure 8 . The height of the third moving reed 25 is lower than that of the first moving reed 23 / second moving reed 24. Since the third moving reed 25 is integrally formed with the first moving reed 23, a bending part is arranged between the third moving reed 25 and the first moving reed 23, as shown in Figure 3 , Figure 4 . The third moving reed 25 also has a height difference H1 with the armature 22, as shown in Figure 9 , and the third moving reed 25 is located directly below the armature 22. The third static reed 33 has a height difference and / or length difference with the first static reed 31 and the second static reed 32. Specifically, the length of the third static reed 33 is shorter than that of the first static reed 31 / second static reed 32, and the length difference between them is L2, as shown in Figure 10 . The height of the third static reed 33 is lower than that of the first static reed 31 / second static reed 32, and the height difference between them is H2, as shown in Figure 10 . In this way, the application can ensure the insulation performance between the contacts.

[0060] In this embodiment, one end of the third moving reed 25 in the length direction is injection molded inside the plastic part 21, and the other end of the third moving reed 25 is a free end and is provided with a moving contact, as shown in Figure 11 . In this way, on the one hand, the pressure resistance between the third moving reed 25 and the armature 22 is ensured, and on the other hand, the fixing of one end of the third moving reed 25 helps to improve the accuracy of the position. The other end of the third moving reed 25 has a certain length exposed outside, so that the third moving reed 25 has flexibility, providing contact pressure, avoiding unstable attraction and causing the contact hardness to be too large and wear too fast.

[0061] In this embodiment, the third moving reed 25 is located between the first moving reed 23 and the second moving reed 24, and the plastic part 21 is provided with an insulating part 211 between adjacent moving reeds, as shown in Figure 11 ​The adjacent moving spring pieces are the third moving spring piece 25 and the first moving spring piece 23 or the third moving spring piece 25 and the second moving spring piece 24. The insulation part 211 can prevent high voltage breakdown and improve the voltage resistance of the product. In this embodiment, the coil assembly includes a core 5 and a coil 6 wound around the core 5. The two ends of the core 5 are bent upwards to form two pole faces that cooperate with the armature 22. The base 1 is integrally formed with the coil assembly and the static spring assembly 3 by injection molding. The first static spring piece 31, the second static spring piece 32 and the third static spring piece 33 are injection molded inside the base 1, and only the static contacts are exposed, thereby ensuring the rigidity of the static contacts. The end of the core 5 adjacent to the third static spring piece 33 is spaced apart from the third static spring piece 33 by a distance L3, as shown in Figure 14 The end of the core 5 is located between the first static spring piece 31 and the second static spring piece 32. The base 1 is provided with an insulation barrier 11 between the end of the core 5 and the first static spring piece 31 and between the end of the core 5 and the second static spring piece 33, as shown in Figure 12 The insulation barrier 11 can increase the creepage distance between the first static spring piece 31, the second static spring piece 33 and the core 5. The third moving spring piece 25 is located between the two ends of the core 5 in the length direction.

[0062] In this embodiment, the first moving spring piece 23 and the second moving spring piece 24 are respectively provided with solder pieces 231 and 241 that are welded to the corresponding solder pads 12 on the top of the base 1. The first static spring piece 31 is electrically connected to or integrally formed with a first lead-out pin 311. The second moving spring piece 24 is electrically connected to a second lead-out pin 241. Specifically, the second lead-out pin 241 is electrically connected to or integrally formed with the solder pad 12 corresponding to the solder piece on the second moving spring piece 24. The first lead-out pin 311 and the second lead-out pin 241 are located on opposite sides of the base 1. In other embodiments, the second lead-out pin is electrically connected to or integrally formed with the solder pad corresponding to the solder piece on the first moving spring piece, and the first lead-out pin is integrally formed with or electrically connected to the second static spring piece. Therefore, the multiple contacts formed by the moving spring assembly and the static spring assembly 3 in the closed state only need two contact lead-out pins (i.e., the first lead-out pin and the second lead-out pin), thereby allowing the two contact lead-out pins to be spaced apart. The coil 6 and the contacts have a large creepage distance and air gap. The two coil lead-out pins of the coil assembly and the two contact lead-out pins have a large isolation degree. Therefore, the coil and the contacts have a strong insulation ability.

[0063] In this embodiment, the application further includes a magnetic steel 7 that is stacked with the armature 22, as shown in Figure 15As shown, but not limited thereto, in other embodiments, the magnetic steel 7 can stand between the moving spring reed 22 component 2 and the coil assembly, as shown in Figure 16 As shown.

[0064] The ultra-small electromagnetic relay with high voltage breaking capacity of the present application, the first moving spring reed 23 cooperates with the first stationary spring reed 31 to form the first group of contacts, the third moving spring reed 25 cooperates with the third stationary spring reed 33 to form the second group of contacts, and the second moving spring reed 24 cooperates with the second stationary spring reed 32 to form the third group of contacts. The moving spring assembly and the stationary spring assembly 3 of the present application are in a closed state, realizing the series connection of the three groups of contacts, as shown in Figure 7 As shown, the arrows in the figure indicate the direction of current flow. Therefore, the present application can use three groups of contacts for voltage division, so that the present application has good breaking capacity and high voltage and large current load switching capacity is improved: due to the voltage division of the three groups of contacts, the relay has good high voltage breaking capacity and the switching power of the contacts is also improved. When each group of contacts is disconnected, there is a strong insulation capacity between the disconnected contacts. Since the present application realizes the series connection of three groups of contacts inside, as shown in Figure 17 Therefore, the client can effectively optimize the circuit structure without complex connection on the circuit. Specifically, the client only needs to connect the input and output, as shown in Figure 18 Without the need for wiring series connection and other operations on two or more relays. Since the second group of contacts is between the first group of contacts and the third group of contacts, no additional space is added, so the present application can maintain the small size of the relay unchanged.

[0065] Example two

[0066] Please refer to Figure 19 The ultra-small electromagnetic relay with high voltage breaking capacity of the present application is different from the above-mentioned embodiment one in that the third moving spring reed 25 is located on one side of the iron core 5 in the length direction. Since the third moving spring reed 25 cooperates with the third stationary spring reed 33, the third stationary spring reed 33 is also located on one side of the iron core 5 in the length direction and corresponds to the third moving spring reed 25 up and down. The present application sets the third moving spring reed 25 and the third stationary spring reed 33 on one side of the iron core 5 in the length direction, which helps to increase the gap between the disconnected contacts and enhance the insulation capacity between the disconnected contacts.

[0067] The ultra-small electromagnetic relay with high voltage breaking capacity of the present application can also realize the series connection of three groups of contacts and also has high voltage breaking capacity.

[0068] Example three

[0069] Please refer to Figures 20-26As shown, the ultra-small electromagnetic relay with high voltage breaking capacity of the present application is different from the above-mentioned embodiments in that the number of the third moving spring plates 25 is two, one of which is electrically connected with or integrally formed with the first moving spring plate 23, and the other of which is electrically connected with or integrally formed with the second moving spring plate 24. Specifically, one of the third moving spring plates is integrally formed with the first moving spring plate 23, and the other of the third moving spring plates is integrally formed with the second moving spring plate 24. The number of the third stationary spring plates 33 is one, and the third stationary spring plate 33 is an independent spring plate and is provided with one stationary contact which cooperates with the moving contacts provided on the two third moving spring plates 25. In other embodiments, the third stationary spring plate is provided with two stationary contacts which respectively cooperate with the moving contacts on the two third moving spring plates.

[0070] In the present embodiment, the third moving spring plate 25 also has a height difference and / or a length difference with the first moving spring plate 23 and the second moving spring plate 24. Specifically, the length of the third moving spring plate 25 is shorter than the length of the first moving spring plate 23 / second moving spring plate 24, and the height of the third moving spring plate 25 is lower than the height of the first moving spring plate 23 / second moving spring plate 24. The third moving spring plate 25 also has a height difference with the armature 22, and the third moving spring plate 25 is located directly below the armature 22, and the two third moving spring plates 25 have a certain distance therebetween, as shown in Figure 22 to ensure the insulation performance between the contacts.

[0071] In the present embodiment, one end of the length direction of the two third moving spring plates 25 is injection molded inside the plastic part 21, and the other end of the length direction of the two third moving spring plates 25 is a free end and is provided with a moving contact, as shown in Figure 21 In this way, on the one hand, the withstand voltage between the third moving spring plate 25 and the armature 22 is ensured, and on the other hand, the fixing of one end of the third moving spring plate 25 is conducive to improving the accuracy of the position. The other end of the third moving spring plate 25 has a certain length L4 exposed outside, so that the third moving spring plate 25 has flexibility, provides contact pressure, avoids unstable attraction, and causes the hardness of the contact to be too large and wear too fast.

[0072] In the present embodiment, the third moving spring plate 25 is located between the first moving spring plate 23 and the second moving spring plate 24, and the plastic part 21 is provided with an insulation part 211 between adjacent moving spring plates, as shown in Figure 21 The adjacent moving spring plates are one third moving spring plate 25 and the first moving spring plate 23 or another third moving spring plate 25 and the second moving spring plate 24. The third stationary spring plate 33 is located between the first stationary spring plate 31 and the second stationary spring plate 32, and the base 1 is provided with an insulation barrier wall 11 between adjacent stationary spring plates, as shown in Figure 24As shown, the adjacent static spring sheet is the third static spring sheet 33 and the first static spring sheet 31 or the third static spring sheet 33 and the second static spring sheet 32. The insulation part 211 can prevent high voltage breakdown and improve the voltage resistance of the product. The setting of the insulation barrier wall 11 can further ensure the insulation performance between the contacts.

[0073] In this embodiment, the first static spring sheet 31 is electrically connected or integrally formed with a first lead-out pin 311, and the second static spring sheet 32 is electrically connected or integrally formed with a second lead-out pin 321. Therefore, only two contact lead-out pins (i.e., the first lead-out pin 311 and the second lead-out pin 321) are needed in the present application, so that the two contact lead-out pins are far apart, the coil 6 and the contacts have a large creepage distance and air gap, and the two coil lead-out pins and the two contact lead-out pins have a large isolation degree. Therefore, the coil and the contacts have a strong insulation ability.

[0074] The ultra-small electromagnetic relay with high voltage breaking capacity comprises a base 1, a coil 6, a coil assembly, a moving spring assembly, a static spring assembly 3, and a contact assembly. The coil assembly is arranged on the base 1 and comprises a coil 6 and two coil lead-out pins. The moving spring assembly is arranged on the base 1 and comprises a first moving spring sheet 23 and a second moving spring sheet 24. The static spring assembly 3 is arranged on the base 1 and comprises a first static spring sheet 31 and a second static spring sheet 32. The contact assembly is arranged on the base 1 and comprises a first contact group, a second contact group, a third contact group, and a fourth contact group. The first contact group is formed by the first moving spring sheet 23 and the first static spring sheet 31. The second contact group is formed by the second moving spring sheet 24 and the second static spring sheet 32. The third contact group is formed by another third moving spring sheet 25 and the third static spring sheet 33. The fourth contact group is formed by another third moving spring sheet 25 and the third static spring sheet 33. Figure 25 、 Figure 26 As shown, Figure 26 The arrows in the middle indicate the direction of current flow. Therefore, the moving spring assembly and the static spring assembly 3 in the present application are in a closed state, realizing the series connection of the four contact groups. The four contact groups can be used for voltage division, so that the present application has good breaking capacity, and the current capacity of the contacts can be increased.

[0075] Embodiment four

[0076] As shown, Figures 27-32 The difference between the ultra-small electromagnetic relay with high voltage breaking capacity and the above-mentioned embodiments is that the static spring assembly 3 and the moving spring assembly cooperate to form a switching type contact structure. Specifically, the number of the first static spring sheet 31, the second static spring sheet 32, the first moving spring sheet 23, and the second moving spring sheet 24 is two respectively. The two first moving spring sheets 23 are integrally formed and distributed along the length direction of the base 1. The two first moving spring sheets 23 are switched with the two first static spring sheets 31. The two second moving spring sheets 24 are integrally formed and distributed along the length direction of the base 1. The two second moving spring sheets 24 are switched with the two second static spring sheets 32.

[0077] In the embodiment, the number of the third moving spring plates 25 is two, and the two third moving spring plates 25 are electrically connected with the two first moving spring plates 23 or integrally formed with the two first moving spring plates 23. Specifically, the two third moving spring plates 25 are integrally formed with the two first moving spring plates 23. The number of the third stationary spring plates 33 is two, and the two third stationary spring plates 33 are electrically connected with the two second stationary spring plates 32 or integrally formed with the two second stationary spring plates 32. Specifically, the two third stationary spring plates 33 are integrally formed with the two second stationary spring plates 32. The two third moving spring plates 25 correspond to the two third stationary spring plates 33.

[0078] In the embodiment, the third moving spring plate 25 also has a height difference and / or a length difference with the first moving spring plate 23 and the second moving spring plate 24. Specifically, the length of the third moving spring plate 25 is shorter than the length of the first moving spring plate 23 / second moving spring plate 24. The height of the third moving spring plate 25 is lower than the height of the first moving spring plate 23 / second moving spring plate 24. The third moving spring plate 25 also has a height difference with the armature 22, and the third moving spring plate 25 is located directly below the armature 22 to ensure the insulation performance between the contacts.

[0079] In the embodiment, one end of the length direction of the two third moving spring plates 25 is injection molded inside the plastic part 21, and the other end of the length direction of the two third moving spring plates 25 is a free end and is provided with a moving contact. In this way, on the one hand, the pressure resistance between the third moving spring plate 25 and the armature 22 is ensured, and on the other hand, the fixing of one end of the third moving spring plate 25 is beneficial to improve the accuracy of the position. The other end of the third moving spring plate 25 has a certain length exposed outside, so that the third moving spring plate 25 has flexibility, provides contact pressure, avoids unstable attraction, and causes the hardness of the contact to be too large and wear too fast.

[0080] In the embodiment, the third moving spring plate 25 is located between the first moving spring plate 23 and the second moving spring plate 24, and the plastic part 21 is provided with an insulation part 211 between adjacent moving spring plates, as shown in Figure 21 The adjacent moving spring plates are one third moving spring plate 25 and the first moving spring plate 23 or another third moving spring plate 25 and the second moving spring plate 24. The third stationary spring plate 33 is located between the first stationary spring plate 31 and the second stationary spring plate 32, and the base 1 is provided with an insulation barrier wall 11 between adjacent stationary spring plates, as shown in Figure 24 The adjacent stationary spring plates are the third stationary spring plate 33 and the first stationary spring plate 31 or the third stationary spring plate 33 and the second stationary spring plate 32. The insulation part 211 can prevent high-voltage breakdown and improve the pressure resistance of the product. The setting of the insulation barrier wall 11 can further ensure the insulation performance between the contacts.

[0081] In the embodiment, the part where the two first moving spring plates 23 are integrally connected is provided with the soldering sheet 231. Similarly, the part where the two second moving spring plates 24 are integrally connected is provided with the soldering sheet 241.

[0082] In the embodiment, the first static spring sheet 31 is electrically connected or integrally formed with a first lead-out pin 311, and the second dynamic spring sheet 24 is electrically connected with a second lead-out pin 241. Since the two second dynamic spring sheets 24 are integrally formed, the two second dynamic spring sheets 24 can share the same second lead-out pin 241, specifically, the second lead-out pin 241 is electrically connected or integrally formed with the welding pad corresponding to the welding pad of the two second dynamic spring sheets 24. Therefore, for the conversion type contact structure, only three contact lead-out pins (i.e. two first lead-out pins connected by the first static spring sheet 31 and one second lead-out pin) are needed in total, so that the three contact lead-out pins are far apart, the coil and the contact have a large creepage distance and air gap, and the two coil lead-out pins of the coil assembly and the two contact lead-out pins have a large isolation degree, so that the coil and the contact have a strong insulation ability.

[0083] The ultra-small electromagnetic relay with high voltage breaking capacity has a conversion type contact structure formed by the static spring assembly 3 and the dynamic spring assembly, so that two contact branches are formed, and the two contact branches switch. Each contact branch realizes the series connection of three contact groups, as shown in Figure 30 The arrow in the figure shows the direction of the current. Therefore, the present application can use three contact groups for voltage division, so that the present application has good breaking capacity and high voltage and large current load switching capacity is improved: since three contact groups are used for voltage division, the relay has good high voltage breaking capacity and the switching power of the contact is also improved. When each contact group is disconnected, the disconnected contact has a strong insulation ability. Since the present application realizes the series connection of three contact groups, as shown in Figure 31 Therefore, the client can effectively optimize the circuit structure without complex connection on the circuit, specifically, the client only needs to connect the input and output, as shown in Figure 32 Without the need for wiring series connection and the like.

[0084] Embodiment five

[0085] Please refer to Figure 32 The ultra-small electromagnetic relay with high voltage breaking capacity is different from the above-mentioned embodiments in that the dynamic contact on at least one dynamic spring sheet adopts a double contact structure 8, and the at least one dynamic spring sheet includes one or more of the first dynamic spring sheet 23, the second dynamic spring sheet 24 and the third dynamic spring sheet 25.

[0086] The above embodiment is only used to further illustrate the ultra-small electromagnetic relay with high voltage breaking capacity according to the present application, but the present application is not limited to the embodiment, and any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present application fall within the protection scope of the technical scheme of the present application.

Claims

1. A miniature electromagnetic relay with high voltage breaking capacity, comprising a base part and a moving spring armature part, the base part comprising a base and a coil assembly and a stationary spring assembly on the base, the moving spring armature part comprising a moving spring assembly, an armature and a plastic part which collects the moving spring assembly and the armature into a single part by injection molding, the moving spring armature part being arranged on top of the base part in a seesaw form; the stationary spring assembly comprising a first stationary spring leaf with stationary contacts and a second stationary spring leaf with stationary contacts, the moving spring assembly comprising a first moving spring leaf cooperating with the first stationary spring leaf and provided with moving contacts and a second moving spring leaf cooperating with the second stationary spring leaf and provided with moving contacts; characterized in that: The moving spring assembly further comprises at least one third moving spring piece provided with a moving contact, the third moving spring piece being an independent spring piece, or the third moving spring piece being electrically connected with or integrally formed with the first moving spring piece or the second moving spring piece or an adjacent third moving spring piece; the stationary spring assembly further comprises at least one third stationary spring piece provided with a stationary contact, the third stationary spring piece being an independent spring piece, or the third stationary spring piece being electrically connected with or integrally formed with the first stationary spring piece or the second stationary spring piece or an adjacent third stationary spring piece, the third moving spring piece and the third stationary spring piece cooperating to form at least three groups of contact points in series connection in the closed state of the moving spring assembly and the stationary spring assembly.

2. The ultra-small electromagnetic relay with high-voltage breaking capacity according to claim 1, characterized in that: The stationary spring assembly and the moving spring assembly cooperate to form a normally open or normally closed contact structure, the number of the third moving spring piece is one, the third moving spring piece being electrically connected with or integrally formed with the first moving spring piece; the number of the third stationary spring piece is one, the third stationary spring piece being electrically connected with or integrally formed with the second stationary spring piece, so that three groups of contact points are formed in series connection in the closed state of the moving spring assembly and the stationary spring assembly.

3. The ultra-small electromagnetic relay with high-voltage breaking capacity according to claim 1, characterized in that: The stationary spring assembly and the moving spring assembly cooperate to form a normally open or normally closed contact structure, the number of the third moving spring piece is two, one of the third moving spring pieces being electrically connected with or integrally formed with the first moving spring piece, and the other third moving spring piece being electrically connected with or integrally formed with the second moving spring piece; the number of the third stationary spring piece is one, the third stationary spring piece being an independent spring piece and provided with one or two stationary contacts, the stationary contacts of the third stationary spring piece cooperating with the moving contacts of the two third moving spring pieces, so that four groups of contact points are formed in series connection in the closed state of the moving spring assembly and the stationary spring assembly.

4. The ultra-small electromagnetic relay with high-voltage breaking capacity according to claim 1, characterized in that: The stationary spring assembly and the moving spring assembly cooperate to form a switching contact structure, the number of the first stationary spring piece, the second stationary spring piece, the first moving spring piece and the second moving spring piece is two respectively, the two first moving spring pieces being integrally formed or electrically connected and cooperating with the two first stationary spring pieces in switching, the two second moving spring pieces being integrally formed or electrically connected and cooperating with the two second stationary spring pieces in switching, the number of the third moving spring piece is two, the two third moving spring pieces being electrically connected with or integrally formed with the two first moving spring pieces respectively, the number of the third stationary spring piece is two, the two third stationary spring pieces being electrically connected with or integrally formed with the second stationary spring piece respectively, the two third moving spring pieces and the two third stationary spring pieces cooperating one by one.

5. The ultra-small electromagnetic relay with high-voltage breaking capacity according to any one of claims 1 to 4, characterized in that: The third moving spring piece has a height difference and / or a length difference with the first moving spring piece and the second moving spring piece, and the third stationary spring piece has a height difference and / or a length difference with the first stationary spring piece and the second stationary spring piece.

6. The ultra-small electromagnetic relay with high-voltage breaking capacity according to any one of claims 1-4, characterized in that: One end of the third moving spring piece in the length direction thereof is injected into the plastic part, the other end of the third moving spring piece in the length direction thereof is a free end and is provided with a moving contact, and the third moving spring piece has a height difference with the armature.

7. The ultra-small electromagnetic relay with high-voltage breaking capacity according to any one of claims 1-4, characterized in that: The third moving reed is located between the first moving reed and the second moving reed, the plastic part is provided with an insulation part between adjacent moving reeds, the adjacent moving reeds are the third moving reed and the first moving reed, or the third moving reed and the second moving reed, or two adjacent second moving reeds; the coil assembly comprises a core and a coil wound outside the core, both ends of the core are bent upwards to form two pole surfaces matched with the armature, one end of the core is located between the first stationary reed and the second stationary reed, and the base is provided with an insulation barrier between the one end of the core and the first stationary reed and between the one end of the core and the second stationary reed.

8. The ultra-small electromagnetic relay with high-voltage breaking capacity according to claim 7, characterized in that: The third moving reed is located between the two ends of the core, the third moving reed is located below the armature, or the third moving reed is located on one side of the core in the length direction.

9. The ultra-small electromagnetic relay with high-voltage breaking capacity according to any one of claims 1-4, characterized in that: The first stationary reed is electrically connected or integrally formed with a first lead-out pin, the second moving reed is electrically connected with a second lead-out pin, or the second stationary reed is electrically connected or integrally formed with a first lead-out pin, the first moving reed is electrically connected with a second lead-out pin, or the first stationary reed is electrically connected or integrally formed with a first lead-out pin, and the second stationary reed is electrically connected or integrally formed with a second lead-out pin.

10. The ultra-small electromagnetic relay with high-voltage breaking capacity according to claim 9, characterized in that: The first moving reed and the second moving reed are respectively provided with a welding piece which is welded together with a welding platform corresponding to the top of the base, the second lead-out pin is electrically connected or integrally formed with the welding platform; the first lead-out pin and the second lead-out pin are located on opposite sides of the base.

11. The ultra-small electromagnetic relay with high-voltage breaking capacity according to any one of claims 1-4, characterized in that: The base collects the coil assembly and the stationary reed assembly into a whole by injection molding; the first moving reed and the second moving reed are distributed along the width direction of the base; further comprising a magnetic steel which is stacked together with the armature, or the magnetic steel stands between the moving reed armature part and the coil assembly.

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