Moving terminal and electromagnetic relay

Abstract

The invention specifically discloses a moving terminal and an electromagnetic relay, and relates to the technical field of relays, the moving terminal comprises a terminal body and an elastic piece, one side of the elastic piece along the length direction of the elastic piece is provided with a buckle, and the elastic piece is clamped with the terminal body through the buckle. The elastic sheet and the terminal body are actually respectively of an independent split structure, the terminal body mainly plays a conductive role, and the elastic sheet mainly plays a role in providing counter-acting force for the terminal body. When the terminal body is conductive and emits heat, as the elastic piece and the terminal body are of a split structure, the influence of heating is small, good strength can be kept all the time so that the elastic piece can be prevented from deforming under the long-term current carrying condition of a relay, meanwhile, the moving terminal assembly is small in overall size, and the requirement for miniaturization of products can be met easily.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a moving terminal and an electromagnetic relay. Background Art

[0002] Electromagnetic relay is an electrical control component, whose main function is to control the large current or voltage at the output end through the small current at the input end, so as to realize functions such as automatic control, signal conversion and circuit protection. In the current electromagnetic relay, conductive thin sheets are usually used as springs (moving terminals).

[0003] During operation, the conductive sheet will be controlled to move, thereby contacting different static terminals and receiving the reaction force of the static terminals. However, since the conductive sheet will inevitably generate heat due to conduction, its ability to resist deformation will be weakened. Therefore, during long-term operation, the conductive sheet will deform under the combined action of conductive heat and reaction force, thereby affecting the working performance of the electromagnetic relay, especially after the relay has been working for a long time, which will have an adverse effect on the switching time of the relay. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a movable terminal that can be used for a long time without being easily deformed.

[0005] The present invention also provides an electromagnetic relay comprising the above-mentioned moving terminal.

[0006] The movable terminal according to the embodiment of the present invention comprises a terminal body and a spring sheet, wherein a buckle is provided on one side of the spring sheet along the length direction of the spring sheet, and the spring sheet is buckled with the terminal body through the buckle.

[0007] The movable terminal according to the embodiment of the present invention has at least the following beneficial effects: since the spring sheet is connected to the terminal body through a buckle, the spring sheet and the terminal body are actually separate structures, wherein the terminal body mainly plays a conductive role, and the spring sheet mainly plays a role in bearing the reaction force. When the terminal body is conductive and heats up, since the spring sheet is a separate structure from the terminal body, the heat effect is small, and the strength and elasticity can be maintained at all times, ensuring the performance of the relay under long-term working conditions. At the same time, the overall volume of the movable terminal assembly of the embodiment of the present invention is small, which is conducive to meeting the demand for miniaturization of products.

[0008] According to one embodiment of the present invention, the buckle includes a first clamping plate and a second clamping plate that are perpendicular to each other, the second clamping plate is connected between the spring sheet and the first clamping plate, the end face of the terminal body along the height direction of the terminal body is provided with a first clamping groove, and the first clamping groove is clamped with the first clamping plate.

[0009] According to an embodiment of the present invention, a second card slot communicating with the first card slot is provided on an end surface of the terminal body along the width direction of the terminal body, and the second card slot is card-engaged with the second card board.

[0010] According to an embodiment of the present invention, the terminal body is made of pure copper material, and the spring piece is made of stainless steel material.

[0011] According to an embodiment of the present invention, two ends of the elastic sheet are respectively in contact with two ends of the terminal body, and a middle portion of the elastic sheet is bent and disposed with a gap with a middle portion of the terminal body.

[0012] According to an embodiment of the present invention, the electromagnetic relay comprises a housing, a pushing member, a static terminal group, a moving terminal group and a driving mechanism, wherein the pushing member is slidably mounted on the housing; the static terminal group comprises two static terminals, the two static terminals are mounted on the housing and are symmetrically distributed on both sides of the pushing member along the length direction of the pushing member, at least two static terminal groups are provided, and at least two static terminal groups are spaced apart along the length direction of the pushing member; the moving terminal group comprises two moving terminals as described in the embodiment of the present invention, the two moving terminals are spaced apart on the pushing member along the length direction of the pushing member, at least one moving terminal group is provided, each moving terminal group is located in the interval between two adjacent static terminal groups, and can only abut against one of the static terminal groups; the driving mechanism is mounted on the housing, and can drive the pushing member to move, so that the moving terminal group is separated from one of the adjacent static terminal groups, and abuts against another adjacent static terminal group.

[0013] The electromagnetic relay according to the embodiment of the present invention has at least the following beneficial effects: due to the use of the moving terminal of the embodiment of the present invention, it can be used for a long time without deformation, so the electromagnetic relay has good working performance and the switching time of the circuit can be kept stable. In addition, since the moving terminal group includes two moving terminals as in the embodiment of the present invention, the two moving terminals are installed on the pusher at intervals along the length direction of the pusher, and there is at least one moving terminal group, each moving terminal group is located in the interval between two adjacent static terminal groups, and can only abut against one of the static terminal groups, so the electromagnetic relay also has the characteristics of long electrical gap between contact groups and short flight time, so that it can reduce the magnetic circuit air gap and realize rapid switching between conversion power sources on the basis of meeting the sufficient isolation requirements between conversion power sources.

[0014] According to an embodiment of the present invention, the terminal body is provided with a first limiting protrusion and a second limiting protrusion, and the first limiting protrusion and the second limiting protrusion are respectively abutted against two end surfaces of the pushing member along the width direction of the pushing member.

[0015] According to an embodiment of the present invention, two of the first limiting protrusions and two of the second limiting protrusions are provided, the two first limiting protrusions are respectively provided on two opposite sides of the terminal body, and the two second limiting protrusions are respectively provided on two opposite sides of the terminal body.

[0016] According to one embodiment of the present invention, the pushing member is provided with a groove, the driving mechanism includes a rotating component and a coil component, the rotating component is provided with a convex column, the convex column cooperates with the groove, the coil component is installed on the shell and can drive the rotating component to make the convex column swing to drive the pushing member to move.

[0017] According to an embodiment of the present invention, the groove is arranged at a middle position of the pushing member along the length direction of the pushing member.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic diagram of a movable terminal according to an embodiment of the present invention; Figure 2 This is an exploded schematic diagram of a movable terminal according to an embodiment of the present invention; Figure 3 A schematic diagram of an electromagnetic relay according to an embodiment of the present invention; Figure 4 An exploded schematic diagram of an electromagnetic relay according to an embodiment of the present invention; Figure 5 A cross-sectional view of an electromagnetic relay according to an embodiment of the present invention; Figure 6 A bottom view of an electromagnetic relay without a first shell portion according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the installation of a pusher and a moving terminal group of an electromagnetic relay according to an embodiment of the present invention; Figure 8 The figure is an exploded schematic diagram of a pusher and a moving terminal group of an electromagnetic relay according to an embodiment of the present invention.

[0020] Reference numerals: Electromagnetic relay 1000; Shell 100; first shell portion 110; avoidance hole 111; second shell portion 120; first mounting groove 121; third shell portion 130; Pushing member 200; mounting seat 210; groove 211; second mounting groove 212; positioning hole 213; cover plate 220; positioning column 221; Static terminal group 300; static terminal 310; The movable terminal assembly 400 ; the movable terminal 410 ; the terminal body 411 ; the first clamping groove 4111 ; the second clamping groove 4112 ; the first limiting protrusion 4113 ; the second limiting protrusion 4114 ; the spring piece 412 ; the buckle 4121 ; the first clamping plate 41211 ; the second clamping plate 41212 ; Driving mechanism 500 ; rotating assembly 510 ; mounting member 511 ; boss 5111 ; magnet 512 ; first iron sheet 513 ; second iron sheet 514 ; coil assembly 520 . DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it is necessary to understand that descriptions involving orientations, such as up, down, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Electromagnetic relay is an electrical control component, whose main function is to control the large current or voltage at the output end through the small current at the input end, so as to realize functions such as automatic control, signal conversion and circuit protection. In the current electromagnetic relay, the conductive sheet is usually used as the moving terminal.

[0026] During operation, the conductive sheet will be controlled to move, thereby contacting different static terminals and receiving the reaction force of the static terminals. However, since the conductive sheet will inevitably generate heat due to conduction, its ability to resist deformation will be weakened. Therefore, during long-term operation, the conductive sheet will deform under the combined action of conductive heat and reaction force, thereby affecting the working performance of the electromagnetic relay.

[0027] To this end, the present invention proposes a movable terminal 410, specifically referring to the accompanying drawings of the specification Figure 1 and Figure 2 shown.

[0028] Reference Figure 1 and Figure 2 As shown, a movable terminal 410 of an embodiment of the present invention includes a terminal body 411 and a spring 412. The spring 412 is provided with a buckle 4121 on one side along the length direction of the spring 412, and the spring 412 is buckled with the terminal body 411 through the buckle 4121. In one embodiment, the buckle 4121 and the spring 412 are an integral component; in another embodiment, the buckle 4121 and the spring 412 are separate components. In this embodiment, the buckle 4121 is connected to the spring 412 by welding or the like.

[0029] It should be noted that the terminal body 411 is made of conductive material and mainly plays the role of conducting electricity; the spring sheet 412 is made of elastic material and mainly plays the role of bearing reaction force and rebound. It can be understood that through the above configuration, the spring sheet 412 and the terminal body 411 are separate structures. When the terminal body 411 is heated due to conduction, the spring sheet 412 is less affected by the heat and can still bear the reaction force and rebound well, thereby preventing the terminal body 411 from deforming during long-term operation.

[0030] Reference Figure 1 As shown, in one embodiment, the spring sheet 412 is bent, that is, the two ends of the spring sheet 412 abut against the terminal body 411, and the middle part of the spring sheet 412 is bent and is set with a gap with the middle part of the terminal body 411. It can be understood that through the above arrangement, the contact area between the spring sheet 412 and the terminal body 411 is small, and when the terminal body 411 is heated due to conduction, the spring sheet 412 is less affected by the heat. It should be noted that the size of the gap between the middle part of the spring sheet 412 and the terminal body 411 is not specifically limited here.

[0031] In one embodiment, the terminal body 411 is made of pure copper material, and the spring piece 412 is made of stainless steel material. It is understandable that the terminal body 411 made of pure copper material has good electrical conductivity, while the stainless steel material has weak electrical conductivity and good thermal stability, so the spring piece 412 made of stainless steel material is not easy to heat up due to conduction, and at the same time, the spring piece 412 can still maintain good strength when affected by the temperature of the terminal body 411.

[0032] Reference Figure 2 As shown, in one embodiment, the buckle 4121 includes a first clamping plate 41211 and a second clamping plate 41212, the first clamping plate 41211 is perpendicular to the second clamping plate 41212, wherein the second clamping plate 41212 is connected between the spring sheet 412 and the first clamping plate 41211. Figure 2 As shown, the terminal body 411 is provided with a first card slot 4111, and the first card slot 4111 is provided on the end face of the terminal body 411 along the height direction of the terminal body 411. It should also be noted that the first card slot 4111 is engaged with the first card plate 41211. It can be understood that by providing the first card slot 4111 on the terminal body 411 to engage with the first card plate 41211, the spring sheet 412 can be better fixed to the terminal body 411.

[0033] Reference Figure 2 As shown, in one embodiment, the first card plate 41211 is a square plate, and the first card slot 4111 is a square slot. In another embodiment, the first card plate 41211 is a triangular plate, and the first card slot 4111 is a triangular slot. It should be noted that the first card plate 41211 can also be other shapes, and the first card slot 4111 can also be other shapes, which are not specifically limited here.

[0034] Reference Figure 2 As shown, in one embodiment, the terminal body 411 is provided with a second card slot 4112, and the second card slot 4112 is provided on the end surface of the terminal body 411 along the width direction of the terminal body 411, and the second card slot 4112 is connected to the first card slot 4111. It should be noted that the second card slot 4112 is engaged with the second card plate 41212. It can be understood that by providing the second card slot 4112 on the terminal body 411 to engage with the second card plate 41212, the spring piece 412 can be better fixed to the terminal body 411. Figure 2 As shown, in one embodiment, the second clamping plate 41212 is a square plate, and the second clamping slot 4112 is a square slot. It should be noted that the second clamping plate 41212 can also be in other shapes, and the second clamping slot 4112 can also be in other shapes, which are not specifically limited here.

[0035] The present invention also provides an electromagnetic relay 1000, specifically referring to the accompanying drawings of the specification Figures 3 to 8 shown.

[0036] Reference Figure 3 and Figure 4 As shown, an electromagnetic relay 1000 according to an embodiment of the present invention includes a housing 100, a pusher 200, a static terminal set 300, a dynamic terminal set 400 and a driving mechanism 500. Figure 4 and Figure 5 As shown, the shell 100 includes a first shell portion 110, a second shell portion 120 and a third shell portion 130, wherein the first shell portion 110 and the second shell portion 120 are connected to form a first installation space, the third shell portion 130 is covered outside the first shell portion 110 and the second shell portion 120, and the inner wall of the third shell portion 130 and the outer wall of the second shell portion 120 define a second installation space.

[0037] Reference Figure 5 and Figure 6 As shown, the pusher 200 is slidably mounted on the housing 100 and is located in the first mounting space. The static terminal group 300 includes two static terminals 310, which are mounted on the housing 100 and symmetrically distributed on both sides of the pusher 200 along the length direction of the pusher 200. Figure 6 As shown, it should be noted that the static terminal group 300 is located in the first installation space, and the second shell 120 is provided with a first installation groove 121 for installing the static terminal 310, and the number of the first installation groove 121 is the same as the number of the static terminals 310. Figure 4 As shown, in addition, the first shell portion 110 is provided with avoidance holes 111 for the static terminals 310 to extend out, and the number of the avoidance holes 111 is the same as the number of the static terminals 310. Figure 6 As shown, it should also be noted that there are at least two static terminal groups 300 , and the at least two static terminal groups 300 are spaced apart along the length direction of the pushing member 200 .

[0038] Reference Figure 6 and Figure 7 As shown, the movable terminal group 400 includes two movable terminals 410 according to an embodiment of the present invention, and the two movable terminals 410 are installed on the pusher 200 at intervals along the length direction of the pusher 200. It should be noted that the pusher 200 is in a square column shape and includes a mounting seat 210 and a cover plate 220. Figure 7 and Figure 8As shown, the mounting seat 210 is provided with a second mounting groove 212, and the second mounting groove 212 is used to install the movable terminal 410. It is understandable that the number of the second mounting grooves 212 is the same as the number of the movable terminals 410. It is understandable that during installation, the movable terminal 410 is first installed in the second mounting groove 212 of the mounting seat 210, and then the cover plate 220 is installed to fix the movable terminal 410. It should be noted that the cover plate 220 is provided with a positioning column 221, and the mounting seat 210 is provided with a positioning hole 213, and the positioning column 221 is positioned and matched with the positioning hole 213 to realize the positioning installation of the cover plate 220. In one embodiment, the cover plate 220 is connected to the mounting seat 210 by a hook structure.

[0039] Reference Figure 6 As shown, it should be noted that there is at least one movable terminal group 400, and each movable terminal group 400 is located in the interval between two adjacent static terminal groups 300 and can only abut against one of the static terminal groups 300. Figure 1 As shown, the driving mechanism 500 is installed on the housing 100 and can drive the pusher 200 to move so that the movable terminal set 400 is separated from one of the adjacent static terminal sets 300 and abuts against another adjacent static terminal set 300 .

[0040] It can be understood that, since the movable terminal 410 of the embodiment of the present invention adopts a separate structure of the terminal body 411 and the spring 412, the terminal body 411 is not easily deformed during long-term use, thereby improving the working stability of the electromagnetic relay 1000 of the embodiment of the present invention. In addition, the movable terminal group 400 is arranged in the interval between two adjacent static terminal groups 300, and the movable terminal group 400 includes two movable terminals 410 arranged at intervals, so that the electromagnetic relay 1000 has the characteristics of a long electrical gap between contact groups and a short flight time, so that the magnetic circuit air gap can be reduced on the basis of meeting the sufficient isolation requirements between the conversion power supplies to achieve rapid switching between the conversion power supplies.

[0041] Reference Figure 2 and Figure 7 As shown, in an electromagnetic relay 1000 of an embodiment of the present invention, the moving terminal 410 is provided with a first limiting protrusion 4113 and a second limiting protrusion 4114. Among them, the first limiting protrusion 4113 and the second limiting protrusion 4114 are respectively in contact with the two end faces of the pusher 200 along the width direction of the pusher 200. It can be understood that the first limiting protrusion 4113 and the second limiting protrusion 4114 play a limiting role to better fix the moving terminal 410. In one embodiment, the first limiting protrusion 4113 is in a square shape, and the second limiting protrusion 4114 is in a square shape. It should be noted that the first limiting protrusion 4113 can also be other shapes, and the second limiting protrusion 4114 can also be other shapes, which are not specifically limited here.

[0042] Continue to refer to Figure 2 and Figure 7 As shown, in one embodiment, two first limiting protrusions 4113 are provided, and the two first limiting protrusions 4113 are respectively provided on two opposite sides of the movable terminal 410; two second limiting protrusions 4114 are provided, and the two second limiting protrusions 4114 are respectively provided on two opposite sides of the movable terminal 410. It can be understood that through the above arrangement, the limiting effect can be better achieved to fix the movable terminal 410.

[0043] Reference Figure 5 and Figure 7 As shown, in an electromagnetic relay 1000 according to an embodiment of the present invention, the pusher 200 is provided with a groove 211, and the driving mechanism 500 includes a rotating assembly 510 and a coil assembly 520, and the rotating assembly 510 is provided with a boss 5111, and the boss 5111 is matched with the groove 211. It should be noted that the coil assembly 520 is located in the second installation space and is installed on the second shell 120, and the coil assembly 520 can drive the rotating assembly 510 to swing the boss 5111 to drive the pusher 200 to move. It can be understood that through the above arrangement, the pusher 200 can be driven quickly to realize the switching function of the electromagnetic relay 1000. It should be noted that the shapes of the boss 5111 and the groove 211 are not specifically limited here.

[0044] Reference Figure 5 As shown, it should be noted that the rotating assembly 510 includes a mounting member 511, a magnet 512, a first iron sheet 513 and a second iron sheet 514. The magnet 512 is installed inside the mounting member 511, the boss 5111 is provided on the mounting member 511, and the first iron sheet 513 and the second iron sheet 514 are installed on the mounting member 511 in parallel and at intervals.

[0045] Reference Figure 5 and Figure 7 As shown, in one embodiment, the groove 211 is disposed at the middle position of the pusher 200 along the length direction of the pusher 200. It can be understood that through the above arrangement, the structure arrangement of the electromagnetic relay 1000 is more reasonable, the volume of the product is greatly reduced, and the demand for miniaturization can be met.

[0046] Reference Figure 6 As shown, in one embodiment, there are four static terminal groups 300 and two dynamic terminal groups 400. It should be noted that one dynamic terminal group 400 is located in the interval between two adjacent static terminal groups 300, and the other dynamic terminal group 400 is located in the interval between the other two adjacent static terminal groups 300.

[0047] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A movable terminal, characterized in that: include: terminal body; The spring sheet is provided with a buckle on one side along the length direction of the spring sheet, and the spring sheet is buckled with the terminal body through the buckle.

2. The movable terminal according to claim 1, characterized in that: The buckle includes a first clamping plate and a second clamping plate which are perpendicular to each other, the second clamping plate is connected between the spring sheet and the first clamping plate, the end surface of the terminal body along the height direction of the terminal body is provided with a first clamping groove, and the first clamping groove is clamped with the first clamping plate.

3. The movable terminal according to claim 2, characterized in that: The end surface of the terminal body along the width direction of the terminal body is provided with a second clamping groove communicating with the first clamping groove, and the second clamping groove is clamped with the second clamping plate.

4. The movable terminal according to claim 1, characterized in that: The terminal body is made of pure copper material, and the spring piece is made of stainless steel elastic material.

5. The movable terminal according to claim 1, characterized in that: Two ends of the spring sheet are respectively in contact with two ends of the terminal body, and the middle portion of the spring sheet is bent and arranged with a gap with the middle portion of the terminal body.

6. An electromagnetic relay, characterized in that include: case; A pushing member, slidably mounted on the housing; A static terminal group, comprising two static terminals, the two static terminals are mounted on the housing and symmetrically distributed on both sides of the pusher along the length direction of the pusher, at least two static terminal groups are provided, and at least two static terminal groups are spaced apart along the length direction of the pusher; A movable terminal group, comprising two movable terminals according to any one of claims 1 to 5, wherein the two movable terminals are installed on the pushing member at intervals along the length direction of the pushing member, and the movable terminal group is provided with at least one, each of the movable terminal groups is located in the interval between two adjacent static terminal groups, and can only abut against one of the static terminal groups; The driving mechanism is installed on the housing and can drive the pushing member to move so that the movable terminal group is separated from one of the adjacent static terminal groups and abuts against another adjacent static terminal group.

7. The electromagnetic relay according to claim 6, characterized in that: The terminal body is provided with a first limiting protrusion and a second limiting protrusion, and the first limiting protrusion and the second limiting protrusion are respectively abutted against two end surfaces of the pushing member along the width direction of the pushing member.

8. The electromagnetic relay according to claim 7, characterized in that: Two of the first limiting protrusions and two of the second limiting protrusions are provided, the two first limiting protrusions are respectively provided on two opposite sides of the terminal body, and the two second limiting protrusions are respectively provided on two opposite sides of the terminal body.

9. The electromagnetic relay according to claim 6, characterized in that: The pusher is provided with a groove, the driving mechanism includes a rotating assembly and a coil assembly, the rotating assembly is provided with a convex column, the convex column cooperates with the groove, the coil assembly is installed on the shell and can drive the rotating assembly to make the convex column swing to drive the pusher to move.

10. The electromagnetic relay according to claim 9, characterized in that: The groove is arranged at a middle position of the pushing member along the length direction of the pushing member.

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