Electromagnetic relay

Abstract

The utility model discloses an electromagnetic relay, which comprises a base, a pushing card, and a magnetic circuit part, a movable spring part and a static spring part which are arranged on the base, an armature of the magnetic circuit part is connected with the movable spring part through the pushing card, the pushing card is provided with a first clamping groove and a second clamping groove, one end of the armature penetrates through the first clamping groove, and the other end of the armature penetrates through the second clamping groove. The second clamping groove is matched with the movable spring part; the armature and / or the pushing card are / is provided with a limiting structure so as to limit one end of the armature to be separated from the first clamping groove. According to the utility model, the connection reliability and the contact reliability of the armature and the pushing card are greatly improved, so that the stability of the over-travel of the relay contact is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to an electromagnetic relay. Background Art

[0002] Relay is an automatic switch element with isolation function. It is widely used in household appliances, remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment. It is one of the most important control elements. It plays the role of automatic adjustment, safety protection, circuit conversion, etc. in the control circuit. Electromagnetic relay is a relay that uses electromagnetic force to drive the relative movement of mechanical parts to produce a predetermined response. It is generally composed of a magnetic circuit part and a contact part. When current passes through the coil of the magnetic circuit part, electromagnetic force is generated, and the armature of the magnetic circuit part is attracted, so that the moving contact on the moving reed of the contact part contacts the static contact on the static reed; when the current in the coil disappears, the electromagnetic force disappears, and the armature resets, so that the moving contact of the moving reed is separated from the static contact of the static reed. The purpose of conducting or cutting off the load circuit is achieved by the attraction or separation of the moving contact and the static contact. An electromagnetic relay in the prior art has an armature of a magnetic circuit part connected to a movable spring part of a contact part through a push card, and the armature and the push card cooperate in the following manner: a card slot is provided at one end of the push card, and one end of the armature is inserted into the card slot. This cooperation between the armature and the push card not only makes the connection reliability between the push card and the armature poor, and the two are easily separated, but also due to the swinging characteristics of the armature, after the armature and the iron core are attracted, the cooperation gap between the push card and the armature becomes larger, so that the contact stability between the push card and the armature is poor, thereby causing the stability of the relay contact overtravel to be poor. Utility Model Content

[0003] The utility model aims at the technical problems existing in the prior art and provides an electromagnetic relay, which improves the contact stability and connection reliability of a push card and an armature through structural improvement.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an electromagnetic relay, including a base, a push card, and a magnetic circuit part, a movable spring part and a static spring part installed on the base, the armature of the magnetic circuit part is connected to the movable spring part through the push card, and the push card is provided with a first card slot and a second card slot, one end of the armature is passed through the first card slot, and the second card slot cooperates with the movable spring part; the armature and / or the push card are provided with a limiting structure to limit one end of the armature from leaving the first card slot.

[0005] Furthermore, the limiting structure includes a first limiting portion and a second limiting portion arranged at one end of the armature, and the first limiting portion and the second limiting portion are respectively limited and cooperated with the two sides of the push card in the depth direction of the first card slot, and the distance between the first limiting portion and the second limiting portion is slightly larger than the depth of the first card slot.

[0006] Furthermore, the first limiting portion includes shoulders respectively arranged on both sides of one end of the armature, the shoulders do not pass through the first clamping slot, and are engaged with the push card on one side in the depth direction of the first clamping slot.

[0007] Furthermore, the second limiting portion includes a limiting protrusion provided at one end of the armature, and the limiting protrusion passes through the first card slot through the elastic deformation of the push card and hooks the push card.

[0008] Furthermore, the limiting protrusion is provided with a guiding inclined surface for facilitating its passing through the first slot; the limiting protrusion is formed by stamping at one end of the armature; and the limiting protrusion is located on a side of the armature facing away from the movable spring portion.

[0009] Furthermore, the armature includes a first side and a second side which are integrally formed and have a preset angle, the first side is matched with the outside of the coil frame of the magnetic circuit part, and the tail end of the first side constitutes one end of the armature, and the second side is matched with the pole shoe surface of the iron core of the magnetic circuit part.

[0010] Furthermore, the portion of the first edge passing through the first slot is bent at a small angle so that the angle between it and the second edge is 89° to 91°; the angle between the rest of the first edge and the second edge is greater than 90° and less than or equal to 102°.

[0011] Furthermore, the second clamping slot is provided with an opening on one side in the width direction of the movable spring portion, and the movable spring portion is at least partially clamped into the second clamping slot from the side of the opening.

[0012] Furthermore, the push card is provided with a boss at one end of the opening to limit the portion of the movable spring that enters the opening from sliding out of the opening.

[0013] Furthermore, the dynamic spring part includes a dynamic spring lead-out piece, a rigid dynamic spring piece, a flexible conductive part, a reaction force spring piece and a dynamic contact, the dynamic spring lead-out piece is installed on the base, one end of the rigid dynamic spring piece is rotatably connected to the dynamic spring lead-out piece, and is electrically connected to the dynamic spring lead-out piece through the flexible conductive part; the dynamic contact is arranged at the other end of the rigid dynamic spring piece; the reaction force spring piece is located between the rigid dynamic spring piece and the dynamic spring lead-out piece, and one end of the reaction force spring piece is connected to the other end of the rigid dynamic spring piece, the other end of the reaction force spring piece and the rigid dynamic spring piece are clamped in the second clamping slot, and there is a spacing between the other end of the reaction force spring piece and the rigid dynamic spring piece.

[0014] Furthermore, the push card is provided with a baffle, which is separated between the movable spring part and the armature.

[0015] Furthermore, it also includes an auxiliary contact assembly, which includes an auxiliary moving spring for setting an auxiliary moving contact and an auxiliary static spring for setting an auxiliary static contact, the auxiliary moving spring and the auxiliary static spring are respectively arranged on the base, and the auxiliary moving spring is driven by the armature, and the state of the auxiliary contact assembly is opposite to the state of the main contact assembly composed of the moving spring part and the static spring part.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Since the armature and / or the push card are provided with a limit structure, the limit structure limits one end of the armature from being separated from the first card slot, so that the utility model can ensure the reliability of the connection between the push card and the armature, avoid the separation of the two, and improve the contact stability between the push card and the armature, thereby improving the stability of the overtravel of the relay contact.

[0018] 2. The limiting structure preferably includes the first limiting part and the second limiting part provided at one end of the armature, so that the push card and the armature form a hinge connection, which can further improve the reliability and contact stability of the connection between the push card and the armature. In particular, the first limiting part includes the shoulder, and the second limiting part includes the limiting convex part, which not only has a simpler structure, but also makes it easier to assemble the push card and the armature.

[0019] 3. The portion of the first side of the armature that passes through the first card slot is bent at a small angle so that the angle between it and the second side of the armature is 89° to 91°, and the angle between the remaining portion of the first side of the armature and the second side of the armature is greater than 90° and less than or equal to 102°, so that during the armature's attraction action, the swing amplitude of the push card is smaller, and the push card action is smoother, thereby further improving the stability of the relay contact overtravel.

[0020] 4. The push card adopts the second card slot and the dynamic spring part (the dynamic spring part is elastically deformed) to be laterally card-fitted, so that the connection structure between the push card and the dynamic spring part is simple and the assembly is convenient.

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model (excluding the housing);

[0023] Figure 2 This is the front view of the utility model (excluding the housing);

[0024] Figure 3 It is a left view of the utility model (excluding the housing);

[0025] Figure 4 It is a right side view of the utility model (excluding the housing);

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the armature of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the armature of the utility model;

[0028] Figure 7 It is a three-dimensional structural schematic diagram of the push card of the utility model;

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the push card and the movable spring part of the utility model in the combined state;

[0030] Fig. 9 This is a front view of the push card and the movable spring part of the utility model in the assembled state;

[0031] Fig.10 It is a bottom view of the utility model;

[0032] Fig.11 yes Fig.10 AA section view;

[0033] Fig.12 It is a schematic diagram of the state of the utility model when the main contact assembly is disconnected;

[0034] Fig.13 It is a schematic diagram of the state of the utility model when the main contact assembly is closed;

[0035] In the figure, 1, base, 2, magnetic circuit part, 21, armature, 211, shoulder, 212, limiting convex part, 213, driving part, 22, coil frame, 23, coil, 24, iron core, 25, yoke, 26, restoring spring, 3, moving spring part, 31, rigid moving spring, 32, moving spring lead-out piece, 33, moving contact, 34, reaction spring, 35, flexible conductive part, 4, static spring part, 41, static spring, 42, static contact, 5, push card, 51, first card slot, 52, second card slot, 521, opening, 522, boss, 53, baffle, 6, auxiliary moving spring, 7, auxiliary static spring, 8, shell, 9, insulating sleeve. DETAILED DESCRIPTION

[0036] In the present utility model, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", "top / bottom", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In addition, in the description of the present invention, unless otherwise specified, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Figure 1-Figure 13 As shown, an electromagnetic relay of the utility model comprises a base 1, a push card 5, and a magnetic circuit part 2 and a main contact assembly mounted on the base 1, the main contact assembly comprises a movable spring part 3 and a static spring part 4 which cooperate with each other, the magnetic circuit part 2 comprises a coil frame 22, a coil 23 wound on the coil frame 22, an iron core 24 inserted in the coil frame 22, an armature 21 and a yoke 25, the coil frame 22 is vertical, the yoke 25 is L-shaped, and one side of the yoke 25 is located below the coil frame 22 and connected to the bottom end of the iron core 24, the other side of the yoke 25 is located outside the coil frame 22 and extends upward, and a knife edge is set at the tail of the other side of the yoke 25, the armature 21 can be swingably mounted on the knife edge, and a restoring spring 26 for providing the armature 21 with reset is matched between the armature 21 and the yoke 25. The armature 21 is connected to the movable spring part 3 through the push card 5, and the push card 5 is approximately in a horizontal state. One end of the push card 5 is provided with a first card slot 51, and one end of the armature 21 is inserted into the first card slot 51. The other end of the push card 5 is provided with a second card slot 52, and the second card slot 52 cooperates with the movable spring part 3. The armature 21 and / or the push card 5 are provided with a limiting structure to limit one end of the armature 21 from being separated from the first card slot 51.

[0039] As a preferred embodiment, the above-mentioned limiting structure includes a first limiting portion and a second limiting portion provided at one end of the armature 21, and the first limiting portion and the second limiting portion are respectively matched with the two sides of the push card 5 in the depth direction (i.e., the up-down direction) of the first card slot 51, so that the push card 5 forms a hinge connection with the armature 21. The distance between the first limiting portion and the second limiting portion is slightly greater than the depth of the first card slot 51, so that there is a certain margin of activity between the push card 5 and the armature 21.

[0040] like Figure 4 As shown, the first limiting portion includes shoulders 211 respectively arranged on both sides of one end of the armature 21, the shoulders 211 do not pass through the first card slot 51, and are engaged with one side of the push card 5 in the depth direction of the first card slot 51, that is, the upper side of one end of the push card 5. Figure 5 As shown, the second limiting portion includes a limiting protrusion 212 provided at one end of the armature 21, the limiting protrusion 212 is located on the side of the armature 21 facing away from the movable spring portion 3, and the limiting protrusion 212 passes through the first card slot 51 through the elastic deformation of the push card 5, and hooks the push card 5. Since the push card 5 is usually made of plastic, the push card 5 has a certain deformation ability, so that the limiting protrusion 212 can pass through the first card slot 51 of the push card 5 by extrusion, and remain fitted on the lower side of the push card 5 after passing through. As a preferred embodiment, the limiting protrusion 212 is provided with a guiding inclined surface to facilitate its passing through the first card slot 51, and the limiting protrusion 212 is formed by stamping at one end of the armature 21.

[0041] In this embodiment, the armature 21 includes a first side and a second side which are integrally formed and have a preset clamping foot. Specifically, the armature 21 is roughly L-shaped, and the first side of the armature 21 is matched with the outer side of the coil frame 22, and is inserted into the first card slot 51 of the push card 5 and is provided with a first limiting portion (i.e., shoulder 211) and a second limiting portion (i.e., limiting convex portion 212). The second side of the armature 21 is matched with the pole shoe surface at the top of the iron core 24. Figure 3 As shown, the first side of the armature 21 that passes through the first card slot 51 is bent at a small angle, so that the angle between it and the second side of the armature 21 is about 90°, specifically 89° to 91°, with the best value of 90°, and the angle between the rest of the first side of the armature 21 and the second side of the armature 21 is greater than 90° and less than or equal to 102°, with the best value of 101.5°. In this way, the swing amplitude of the armature 21 pushing the card 5 is smaller during the suction action, and the action of pushing the card 5 is more stable. The size of the small angle is about 10°.

[0042] In this embodiment, if Figure 7As shown, the second card slot 52 is provided with an opening 521 on one side in the width direction of the movable spring part 3, and the movable spring part 3 is at least partially inserted into the second card slot 52 from the side of the opening 521. Further, the push card 5 is provided with a boss 522 at one end of the opening 521, which can limit the part of the movable spring part 3 that enters the opening from sliding out of the opening 521.

[0043] In this embodiment, the movable spring part 3 has the ability to resist short-circuit current, and includes a movable spring lead-out piece 32, a rigid movable spring piece 31, a flexible conductive member 35, a reaction force spring piece 34 and a movable contact 33. The movable spring lead-out piece 32 is inserted into the base 1, one end of the rigid movable spring piece 31 faces upward and is rotatably connected to the movable spring lead-out piece 32, and is electrically connected to the movable spring lead-out piece 32 through the flexible conductive member 35; the movable contact 33 is arranged at the other end of the rigid movable spring piece 31 facing downward, the reaction force spring piece 34 is located between the rigid movable spring piece 31 and the movable spring lead-out piece 32, and one end of the reaction force spring piece 34 faces downward and is connected to the other end of the rigid movable spring piece 31, the other end of the reaction force spring piece 34 faces upward, and there is a distance between the other end of the reaction force spring piece 34 and the rigid movable spring piece 31. The other end of the reaction spring 34 and the rigid dynamic spring 31 are clamped in the second clamping slot 52 of the push card 5 through the above-mentioned opening 521, that is, the other end of the reaction spring 34 is blocked and limited by the said boss 522, so that it will not slide out of the second clamping slot 52. The static spring part 4 includes a static spring 41 and a static contact 42, the static spring 41 is inserted on the base 1, and the static contact 42 is riveted on the static spring 41 and corresponds to the dynamic contact 33.

[0044] In this embodiment, the utility model also includes an auxiliary contact assembly, which includes an auxiliary moving spring piece 6 for setting an auxiliary moving contact and an auxiliary static spring piece 7 for setting an auxiliary static contact. The auxiliary moving spring piece 6 and the auxiliary static spring piece 7 are respectively arranged on the base 1, and the auxiliary moving spring piece 6 is driven by the armature 21. Specifically, a driving part 213 is arranged at the tail of the second side of the armature 21, and the driving part 213 is covered with an insulating sleeve 9. When the second side of the armature 21 is attracted with the pole shoe surface of the iron core 24, the auxiliary moving spring piece 6 is driven to operate, so that the auxiliary moving contact is disconnected from the auxiliary static contact. The state of the auxiliary contact assembly is opposite to that of the main contact assembly, that is, when the moving contact 33 is closed with the static contact 42, the auxiliary moving contact is disconnected from the auxiliary static contact, and when the moving contact 33 is disconnected with the static contact 42, the auxiliary moving contact is closed with the auxiliary static contact.

[0045] As a preference, the push card 5 is further provided with a baffle 53 , which extends upward and is separated between the movable spring part 3 and the armature 21 to increase the air gap and creepage distance between the main contact assembly and the magnetic circuit part 2 .

[0046] In this embodiment, the utility model also includes a shell 8, the bottom end of which is open and connected to the base 1, and the magnetic circuit part 2, the main contact part, the auxiliary contact part, the push card 5, etc. are contained in its shell cavity.

[0047] The utility model provides an electromagnetic relay, whose initial state is as follows Fig.12 As shown, at this time, the moving contact 33 is disconnected from the static contact 42, the two sides of the armature 21 are at a certain angle to the horizontal plane, the push card 5 (except the baffle 53 on the push card 5) is basically in a horizontal state, and there is a certain small gap between the shoulder 211 of the armature and the push card 5, the size of which is L, as shown in FIG. Fig.12 As shown. During the process of the second side of the armature 21 and the iron core 24 being attracted, one end of the push card 5 moves upward naturally as the armature 21 rotates, driven by the limiting protrusion 212, so that the push card 5 is at a certain angle to the horizontal plane. At the same time, the push card 5 pushes the reaction spring 34 to the left, so that the rigid moving spring 31 rotates toward the direction of the static spring part 4 until the moving contact 33 contacts the static contact 42. Fig.13 As shown, the push card 5 then pushes the reaction spring 34 to deform, achieving contact overtravel. When the second side of the armature 21 and the iron core 24 are attracted to the right position, the second side of the armature 21 is parallel to the horizontal plane, and the tail of the first side of the armature 21 is perpendicular to the horizontal plane. When the second side of the armature 21 is released by the iron core 24, the armature 21 rotates and resets under the action of the restoring spring 26, and the first side of the armature 21 drives the push card 5 to move rightward, and the push card 5 drives the rigid moving spring 31 to rotate rightward, so that the moving contact 33 is disconnected from the static contact 42.

[0048] The utility model provides an electromagnetic relay, wherein the armature 21 and the push card 5 are hingedly connected, so that the connection reliability and contact reliability of the two are greatly improved, thereby improving the stability of the relay contact overtravel; the part of one side of the armature 21 that passes through the first card slot 51 is bent at a small angle, so that during the suction action of the armature 21, the swing amplitude of the push card 5 is small, and the action of the push card 5 is more stable, thereby further improving the stability of the relay contact overtravel.

[0049] The utility model provides an electromagnetic relay, and the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.

[0050] The above embodiments are only used to further illustrate an electromagnetic relay of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. An electromagnetic relay, comprising a base, a push card, and a magnetic circuit part, a moving spring part and a static spring part installed on the base, wherein an armature of the magnetic circuit part is connected to the moving spring part through the push card, and the push card is provided with a first card slot and a second card slot, one end of the armature is passed through the first card slot, and the second card slot cooperates with the moving spring part; characterized in that: The armature and / or the push card are provided with a limiting structure to limit one end of the armature from being separated from the first card slot.

2. The electromagnetic relay according to claim 1, characterized in that: The limiting structure includes a first limiting portion and a second limiting portion arranged at one end of the armature, the first limiting portion and the second limiting portion are respectively limited and matched on both sides of the push card in the depth direction of the first card slot, and the distance between the first limiting portion and the second limiting portion is greater than the depth of the first card slot.

3. The electromagnetic relay according to claim 2, characterized in that: The first limiting portion includes shoulders respectively arranged on both sides of one end of the armature, the shoulders do not pass through the first clamping slot, and are engaged with the push card on one side in the depth direction of the first clamping slot.

4. The electromagnetic relay according to claim 2, characterized in that: The second limiting portion includes a limiting protrusion arranged at one end of the armature, and the limiting protrusion passes through the first card slot through the elastic deformation of the push card and hooks the push card.

5. The electromagnetic relay according to claim 4, characterized in that: The limiting protrusion is provided with a guiding inclined surface for facilitating its passing through the first clamping groove; the limiting protrusion is formed by stamping at one end of the armature; and the limiting protrusion is located on a side of the armature facing away from the movable spring portion.

6. The electromagnetic relay according to any one of claims 1 to 5, characterized in that: The armature includes a first side and a second side which are integrally formed and have a preset angle, the first side being fitted on the outside of the coil frame of the magnetic circuit part, and the tail end of the first side constituting one end of the armature, and the second side being fitted with the pole shoe surface of the iron core of the magnetic circuit part; the portion of the first side passing through the first slot is bent at a small angle so that the angle between it and the second side is 89° to 91°; the angle between the remaining portion of the first side and the second side is greater than 90° and less than or equal to 102°.

7. The electromagnetic relay according to claim 1, characterized in that: The second clamping slot is provided with an opening on one side in the width direction of the movable spring portion, and the movable spring portion is at least partially clamped into the second clamping slot from the side of the opening.

8. The electromagnetic relay according to claim 7, characterized in that: The push card is provided with a boss at one end of the opening to limit the portion of the movable spring that enters the opening from sliding out of the opening.

9. The electromagnetic relay according to claim 1, 7 or 8, characterized in that: The dynamic spring part includes a dynamic spring lead-out piece, a rigid dynamic spring piece, a flexible conductive part, a reaction force spring piece and a dynamic contact. The dynamic spring lead-out piece is installed on the base, one end of the rigid dynamic spring piece is rotatably connected to the dynamic spring lead-out piece, and is electrically connected to the dynamic spring lead-out piece through the flexible conductive part; the dynamic contact is arranged at the other end of the rigid dynamic spring piece; the reaction force spring piece is located between the rigid dynamic spring piece and the dynamic spring lead-out piece, and one end of the reaction force spring piece is connected to the other end of the rigid dynamic spring piece, the other end of the reaction force spring piece and the rigid dynamic spring piece are clamped in the second clamping groove, and there is a distance between the other end of the reaction force spring piece and the rigid dynamic spring piece.

10. The electromagnetic relay according to claim 1, characterized in that: The push card is provided with a baffle plate, which is separated between the movable spring part and the armature; It also includes an auxiliary contact assembly, which includes an auxiliary moving spring for setting an auxiliary moving contact and an auxiliary static spring for setting an auxiliary static contact, the auxiliary moving spring and the auxiliary static spring are respectively arranged on the base, and the auxiliary moving spring is driven by the armature, and the state of the auxiliary contact assembly is opposite to the state of the main contact assembly composed of the moving spring part and the static spring part.

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