Electromagnetic relay

Abstract

The utility model discloses an electromagnetic relay which comprises a base, an insulating middle cover, a magnetic circuit part and a contact part, the contact part is arranged in the base, and the middle cover is connected to the base and covers the contact part; the magnetic circuit part is arranged on one side, opposite to the contact part, of the middle cover, and a contact leading-out pin of the contact part and a coil leading-out pin of the magnetic circuit part are respectively led out from the base; the magnetic circuit part is provided with a push rod, and one end of the push rod penetrates through the middle cover and is matched with the contact part. When in use, the lead-out pins can be directly inserted into a circuit board to realize electrical connection, so that the installation space of a product is smaller, and the structure is more compact. And the middle cover can realize strong and weak current isolation, so that the safety performance of the high-voltage switch cabinet is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay technical field, especially a kind of electromagnetic relay. BACKGROUND

[0002] Electromagnetic relay is a kind of electronic control device, it is usually applied in automatic control circuit, it is actually the " automatic switch " of smaller current to control larger current, so it plays the role of automatic regulation, safety protection, conversion circuit in circuit.

[0003] The core structure of electromagnetic relay is magnetic circuit part and contact part, also can be called electromagnetic assembly and contact assembly, magnetic circuit part and contact part some adopt same layer layout mode, some adopt upper and lower layer layout mode, and when adopting upper and lower layer layout mode, contact part is usually arranged in upper, magnetic circuit part is arranged in lower, but this layout mode causes the lead-out pin of relay to be led out upward, and relay can only rely on wire to realize electrical connection when being applied, and cannot be directly inserted and applied to circuit board. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of electromagnetic relay for the technical problem existing in prior art, it is directly plugged and applied to circuit board by structure improvement.

[0005] The technical scheme that the utility model solves its technical problem is as follows: a kind of electromagnetic relay, including base, insulating middle cover, magnetic circuit part, contact part, contact part is located in base, middle cover is connected on base, and covers contact part;The magnetic circuit part is located on the side of the middle cover opposite to the contact part, and the contact lead-out pin of the contact part and the coil lead-out pin of the magnetic circuit part are led out from the base respectively;The magnetic circuit part is provided with push rod, one end of the push rod passes through the middle cover, and is matched with the contact part.

[0006] Further, it further includes shell, the shell is connected base and / or middle cover, and wraps the magnetic circuit part, the magnetic circuit part has moving iron core, and the moving iron core is coaxially connected with the push rod;Further including operating member, the shell is provided with mounting hole at the position corresponding to the other end of the push rod, the operating member is movably installed in the mounting hole, and the operating member can be manually operated to push the moving iron core and / or the push rod axial movement.

[0007] Further, the operating member is knob, the shell is provided with helical guide structure, the knob is matched with the helical guide structure, so that the knob is rotated around the axial direction of the push rod Screw motion is made, and the moving iron core and / or the push rod axial movement is pushed.

[0008] Further, the spiral guide structure comprises a plurality of arc-shaped guide blocks arranged on the inner surface of the shell and distributed along the circumference of the mounting hole, each arc-shaped guide block is provided with a helical surface of the same rotation direction facing the end surface of one end of the moving iron core, the knob is provided with a protrusion extending radially outward corresponding to each helical surface, and each protrusion is slidably fitted on the corresponding helical surface.

[0009] Further, the helical surface is provided with a clamping groove near one end of the moving iron core, and the protrusion is clamped into the clamping groove when sliding to the bottom of the helical surface.

[0010] Further, the other end of the push rod is located outside the moving iron core and is sleeved with an elastic member which is abuttingly fitted between the operating member and the moving iron core to drive the operating member to reset in the direction away from the moving iron core, and the initial compression amount of the elastic member is greater than the movement stroke of the moving iron core when being pushed by the knob.

[0011] Further, before the knob is rotated in the direction of pushing the moving iron core and / or the push rod, the end of the knob exposed outside the shell is flush with the outer surface of the shell provided with the mounting hole and is provided with an operating groove.

[0012] Further, the base is snap-connected with the middle cover, and the middle cover is snap-connected with the shell.

[0013] Further, the contact part comprises a contact support, a moving contact part mounted on the contact support, and a static contact part matched with the moving contact part, the static contact part is provided with the contact lead-out pin, one end of the push rod is matched with the contact support to drive the moving contact part and the static contact part to close or disconnect.

[0014] Further, the moving contact part comprises a moving contact bridge, the static contact part comprises two static contacts, the two static contacts are respectively provided with static contact points, and the moving contact bridge is respectively provided with moving contact points arranged opposite to the static contact points on the two static contacts; a contact spring is arranged between the moving contact bridge and the contact support, and the contact spring is located on the side of the moving contact bridge opposite to the static contact; a reset spring is arranged between the contact support and the base to drive the contact support to reset in the direction of disconnecting the moving contact points and the static contact points.

[0015] Further, the moving contact parts and the static contact parts are respectively provided as a plurality of parts, the plurality of moving contact parts are distributed along the length direction of the contact support on the same contact support, the plurality of static contact parts correspond to the plurality of moving contact parts one by one, the base is provided with a plurality of separation cavities distributed along the length direction of the contact support and separated from each other, the plurality of separation cavities correspond to the plurality of moving contact parts one by one, and each moving contact part and static contact part is respectively arranged in the corresponding separation cavity.

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

[0017] 1, the utility model discloses the base, the middle cover, the magnetic circuit part, the contact part, realized the layout mode of magnetic circuit part down, the contact part up, make the coil lead foot of magnetic circuit part and the contact lead foot of contact part can lead down, thereby make the utility model application can make each lead foot direct plug -in in the circuit board and realize electrical connection, make product installation space smaller, and the structure is more compact. Especially, the utility model sets up the middle cover, and the contact part is separated from the magnetic circuit part up and down, can realize strong and weak electricity isolation, improve the safety performance of the utility model.

[0018] 2, the above layout mode of the utility model makes the shell appearance is relatively simple, and further sets up the operating part, and the utility model still has manual drive mode, is convenient for overhauling or testing, and solves the single mode of traditional relay only relying on electromagnetic drive.

[0019] 3, the operating part is a knob, and is cooperated with the spiral guide structure arranged on the shell, so that the knob can convert the rotating torque into the axial thrust, and the operation mode is relatively simple. Especially, the spiral guide structure includes a plurality of arc-shaped guide blocks arranged on the inner surface of the shell and distributed along the circumference of the mounting hole, and each arc-shaped guide block is provided with a spiral surface, so that the knob and the shell cooperation structure are relatively simple, the process is simple, the cooperation reliability is good, and plastic chips are not rubbed out.

[0020] 4, before the knob is operated, the end exposed outside the shell is flush with the outer surface of the mounting hole of the shell, so that the possibility of mistaken operation of the knob can be greatly reduced.

[0021] 5, the plurality of moving contact bridges are distributed along the length direction of the contact support on the same contact support, so that the utility model can realize that one contact support drives multiple moving contact bridges to move synchronously, which not only can improve the synchronism and consistency of each group of contact actions, but also makes the overall structure more compact, and is beneficial to realize product miniaturization. Especially, the base is provided with a plurality of separation cavities, the plurality of separation cavities correspond to the plurality of moving contact bridges one by one, and each moving contact bridge and static contact assembly is respectively arranged in the corresponding separation cavity, so that the creepage distance between adjacent phases can be greatly improved.

[0022] The utility model makes further detailed description in combination with the drawings and examples; but a kind of electromagnetic relay of the utility model is not limited to examples. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the exploded schematic view of the utility model;

[0024] Figure 2 It is the cooperation schematic view of the shell and knob of the utility model;

[0025] Figure 3 It is Figure 2 the enlarged schematic view of part A in it;

[0026] Figure 4 It is the three-dimensional structure schematic view of the utility model;

[0027] Figure 5 It is the plan view of the utility model;

[0028] Figure 6 It is the D-D section view of the utility model;

[0029] Figure 7 It is Figure 6 the enlarged schematic view of part B in it;

[0030] In the drawing: 1, base; 2, middle cover; 3, shell; 31, mounting hole; 32, arc-shaped guide block; 321, helical surface; 322, clamping groove; 4, moving contact assembly; 41, contact support; 42, moving spring piece; 43, moving contact point; 44, contact spring; 5, static contact part; 51, static contact; 52, static contact point; 53, contact lead-out leg; 6, magnetic circuit part; 61, moving core; 62, push rod; 63, coil lead-out leg; 64, yoke frame; 65, coil frame; 66, coil; 67, static core; 7, knob; 71, convex part; 72, limiting slot; 73, operation groove; 8, elastic member, 9, reset spring. DETAILED DESCRIPTION

[0031] In the utility model, the terms "first", "second", "third" and the like are only used to distinguish similar objects, and are not used to describe a specific order or sequence, nor can be understood as indicating or implying relative importance. In the description, the orientation or position relationship indicated by "upper", "lower", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and is not used to indicate or imply that the device must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the scope of protection of the utility model. For ordinary skilled persons in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] In addition, in the description of the utility model, unless otherwise specified, "a plurality of" refers to two or more than two. "And / or", the association relationship of the associated object is described, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship.

[0033] Please refer to Figures 1-7 As shown in the figure, the utility model relates to an electromagnetic relay, which comprises a base 1, a shell 3, an insulating middle cover 2, a magnetic circuit part 6, a contact part, the contact part is arranged in the base 1, the middle cover 2 is connected with the base 1 and covers the contact part. The magnetic circuit part 6 is arranged on the side of the middle cover opposite to the contact part, the shell 3 is connected with the base 1 and / or the middle cover 2 and wraps the magnetic circuit part 6. The contact part is provided with a contact lead-out pin 53, and the magnetic circuit part 6 is provided with a coil lead-out pin 63, which are respectively led out from the bottom end of the base 1. The magnetic circuit part 6 has a moving iron core 61, the moving iron core 61 is coaxially connected with a push rod 62, one end of the push rod 62 penetrates through the middle cover 2 and cooperates with the contact part. In the embodiment, the shell 3 is connected with the middle cover 2, but it is not limited to this, in other embodiments, the shell 3 is connected with the base 1, or the shell 3 is connected with the base 1 and the middle cover 2. Specifically, the base 1 is snap-connected with the middle cover 2, and the middle cover 2 is snap-connected with the shell 3, but the snap-connection mode is not unique, and other modes such as screw connection, ultrasonic welding and the like can be used instead.

[0034] As a preferred mode, the utility model further comprises an operating member, the shell 3 is provided with a mounting hole 31 at the position corresponding to the other end of the push rod 62, the operating member is movably mounted in the mounting hole 31, and the operating member can be manually operated to push the moving iron core 61 and / or the push rod 62 to move axially, so as to trigger the contact part. Specifically, in the embodiment, the operating member is a knob 7, the shell 3 is provided with a spiral guide structure, the knob 7 cooperates with the spiral guide structure, so that when the knob 7 is rotated, it rotates around the axis direction of the push rod 62 and pushes the moving iron core 61 and / or the push rod 62 to move axially. In other embodiments, the operating member is a button, which can be pressed to push the moving iron core 61 and / or the push rod 62 to move axially.

[0035] As Figure 2 , Figure 3As shown, the spiral guide structure comprises a plurality of arc-shaped guide blocks 32 arranged on the inner surface of the shell 3 and distributed along the circumference of the mounting hole 31, each arc-shaped guide block 32 is provided with a spiral surface 321 of the same rotation direction facing the end surface of one end of the moving iron core 61, the knob 7 is provided with a protrusion 71 extending radially outward corresponding to each spiral surface 321, and each protrusion 71 is slidingly fitted on the corresponding spiral surface 321. In this embodiment, the arc-shaped guide blocks 32 and the protrusions 71 are each exemplified by two, but are not limited thereto, and the two protrusions 71 are located in the same radial direction of the knob 7. Each spiral surface 321 is provided with a clamping groove 322 near one end of the moving iron core 61 (i.e. the bottom end of the spiral surface 321), and the protrusion 71 is clamped into the clamping groove 322 when sliding to the bottom of the spiral surface 321, so that the knob 7 can be kept in the lowest position (i.e. the closed position of the contact) under the action of the elastic member below after being operated, preventing the knob 7 from sliding back to the highest position (i.e. the open position of the contact) under the vibration condition, and also allowing the user to rotate the knob 7 without needing to keep pressing the knob 7.

[0036] As shown, Figures 4-6 Before the knob 7 is rotated in the direction of pushing the moving iron core 61 and / or the push rod 62, the end of the knob 7 exposed outside the shell 3 is flush with the outer surface of the shell 3 provided with the mounting hole 31, and is provided with an operation groove 73, which is specifically a letter-shaped groove, but is not limited thereto. In this way, the possibility of misoperation of the knob 7 can be greatly reduced. The rotation angle of the knob 7 each time it is operated is about 90°, but is not limited thereto, and the outer surface of the shell 3 is provided with "ON" and "OFF" indication marks at both ends of the rotation angle range of the knob 7.

[0037] In this embodiment, the other end of the push rod 62 is located outside the moving iron core 61 and is sleeved with an elastic member 8, which is abuttingly fitted between the knob 7 and the moving iron core 61 to drive the knob 7 to reset in the direction away from the moving iron core 61, and the initial compression amount of the elastic member 8 is greater than the movement stroke of the moving iron core 61 when being pushed by the knob 7. In this way, the knob 7 is always in the highest position before being operated, and does not affect the normal working state of the magnetic circuit part 6. The elastic member 8 adopts a spiral spring, the top end of which is sleeved into a limiting groove 72 provided at the bottom of the knob 7, and at the same time, the other end of the push rod 62 is clamped into the limiting groove 72, as shown in Figure 6 、 Figure 7 .

[0038] The contact portion comprises a contact support 41, a movable contact portion mounted on the contact support 41, and a static contact portion matched with the movable contact portion, and the contact support 41 is movably arranged in the base 1. The movable contact portion and the contact support 41 together form a movable contact assembly 4. The movable contact portion specifically comprises a movable contact bridge 42, and the static contact portion 5 comprises two static contacts 51, each of which is provided with a static contact point 52, and the two ends of the movable contact bridge 42 are respectively provided with movable contact points 43 which are oppositely arranged with the static contact points 52 on the two static contacts 51. One end of the push rod 62 is matched with the contact support 41 to drive the contact support 41 to move, so that the movable contact points 43 and the static contact points 52 are closed or disconnected. The static contact 51 is provided with a contact lead-out leg 53.

[0039] The movable contact bridge 42 and the static contact portion 5 are respectively provided in plurality, and the plurality of movable contact bridges 42 are distributed along the length direction of the contact support 41 on the same contact support 41, so that the utility model can realize that one contact support 41 drives the plurality of movable contact bridges 42 to move synchronously, not only can improve the synchronism and consistency of each group of contact points, but also makes the overall structure more compact, which is beneficial to realize the miniaturization of the product. The plurality of static contact portions 5 correspond to the plurality of movable contact bridges 42 one by one. The contact spring 44 is arranged between the movable contact bridge 42 and the contact support 41, and the contact spring 44 is located on the side of the movable contact bridge 42 away from the static contact 51 to provide contact overtravel and dynamic closing force. The reset spring 9 is arranged between the contact support 41 and the base 1, and is used to drive the contact support 41 to reset in the direction of disconnecting the movable contact points 43 and the static contact points 52.

[0040] In the embodiment, the movable contact bridge 42 and the static contact portion 5 are respectively taken as four examples, but are not limited thereto, thus the utility model is applicable to three-phase four-wire or three-phase five-wire AC power systems. The base 1 is provided with a plurality of separation cavities 11 which are distributed along the length direction of the contact support 41 and are spaced apart from each other, and the plurality of separation cavities 11 correspond to the plurality of movable contact bridges 42 one by one, and each movable contact bridge 42 and static contact portion 5 is mounted in the corresponding separation cavity 11, thus the creepage distance between adjacent phases can be greatly improved.

[0041] In the embodiment, the magnetic circuit portion 6 comprises a yoke frame 64 in the form of a vertical frame, a coil frame 65 wound with a coil 66, and a core assembly, the coil frame 65 is arranged in the yoke frame 64, the core assembly is arranged in the shaft hole of the coil frame 65, and the yoke frame 64 is respectively provided with a give-up hole corresponding to the core assembly at both ends in the axial direction of the core assembly. The core assembly specifically comprises the above-mentioned movable core 61 and a static core 67 located between the movable core 61 and the middle cover 2, the static core 67 is fixed to the yoke frame 64, the push rod 62 is arranged in the static core 67, and the above-mentioned coil lead-out leg 63 is arranged in the coil frame 65 and passes through the middle cover 2. In other embodiments, the core assembly further comprises a static core located above the movable core and fixed to the yoke frame.

[0042] The utility model discloses a kind of electromagnetic relays, it realizes the layout mode of magnetic circuit part 6 in upper, contact part in lower, so that the coil lead-out pin 63 of magnetic circuit part 6 and the contact lead-out pin 53 of contact part can be led out downwards, so that the utility model application can make each lead-out pin be directly inserted in circuit board to realize electrical connection, so that product installation space is smaller, structure is more compact.

[0043] The utility model discloses a kind of electromagnetic relays, it realizes the layout mode of magnetic circuit part 6 in upper, contact part in lower, so that the coil lead-out pin 63 of magnetic circuit part 6 and the contact lead-out pin 53 of contact part can be led out downwards, so that the utility model application can make each lead-out pin be directly inserted in circuit board to realize electrical connection, so that product installation space is smaller, structure is more compact.

[0044] The utility model discloses a kind of electromagnetic relays, it realizes the layout mode of magnetic circuit part 6 in upper, contact part in lower, so that the coil lead-out pin 63 of magnetic circuit part 6 and the contact lead-out pin 53 of contact part can be led out downwards, so that the utility model application can make each lead-out pin be directly inserted in circuit board to realize electrical connection, so that product installation space is smaller, structure is more compact.

[0045] The utility model discloses a kind of electromagnetic relays, it realizes the layout mode of magnetic circuit part 6 in upper, contact part in lower, so that the coil lead-out pin 63 of magnetic circuit part 6 and the contact lead-out pin 53 of contact part can be led out downwards, so that the utility model application can make each lead-out pin be directly inserted in circuit board to realize electrical connection, so that product installation space is smaller, structure is more compact.

[0046] The utility model discloses a kind of electromagnetic relays, it realizes the layout mode of magnetic circuit part 6 in upper, contact part in lower, so that the coil lead-out pin 63 of magnetic circuit part 6 and the contact lead-out pin 53 of contact part can be led out downwards, so that the utility model application can make each lead-out pin be directly inserted in circuit board to realize electrical connection, so that product installation space is smaller, structure is more compact.

Claims

1. An electromagnetic relay characterized by: The magnetic circuit part is arranged on the side of the middle cover opposite to the contact part, and the contact lead-out pin of the contact part and the coil lead-out pin of the magnetic circuit part are respectively led out from the base; the magnetic circuit part is provided with a push rod, one end of the push rod penetrates through the middle cover and cooperates with the contact part.

2. The electromagnetic relay according to claim 1, characterized in that: The shell is connected with the base and / or the middle cover and wraps the magnetic circuit part, the magnetic circuit part has a moving iron core, and the moving iron core is coaxially connected with the push rod; an operating member is further arranged, the shell is provided with a mounting hole at the position corresponding to the other end of the push rod, and the operating member is movably arranged in the mounting hole, and the operating member can be manually operated to drive the moving iron core and / or the push rod to move axially.

3. The electromagnetic relay according to claim 2, characterized in that: The operating member is a knob, the shell is provided with a spiral guide structure, and the knob cooperates with the spiral guide structure so that the knob performs spiral movement around the axis of the push rod when the knob is rotated, and the moving iron core and / or the push rod move axially.

4. The electromagnetic relay according to claim 3, characterized in that: The spiral guide structure comprises a plurality of arc-shaped guide blocks arranged on the inner surface of the shell and distributed along the circumference of the mounting hole, and each arc-shaped guide block is provided with a spiral surface with the same rotation direction on the end face facing the one end of the moving iron core, the knob is provided with a convex part extending outward along the radial direction of the knob corresponding to each spiral surface, and each convex part is slidably arranged on the corresponding spiral surface.

5. The electromagnetic relay according to claim 4, characterized in that: The spiral surface is provided with a clamping groove near the one end of the moving iron core, and the convex part is clamped into the clamping groove when sliding to the bottom of the spiral surface.

6. The electromagnetic relay according to any one of claims 2 to 5, characterized in that: The other end of the push rod is located outside the moving iron core and is sleeved with an elastic member, the elastic member is abuttingly arranged between the operating member and the moving iron core, so as to drive the operating member to reset in the direction away from the moving iron core, and the initial compression amount of the elastic member is greater than the movement stroke of the moving iron core when the moving iron core is driven by the operating member.

7. The electromagnetic relay according to any one of claims 3 to 5, characterized in that: Before the knob is rotated in the direction of driving the moving iron core and / or the push rod to move, the one end of the knob exposed outside the shell is flush with the outer surface of the shell provided with the mounting hole, and an operating groove is arranged on the one end of the knob.

8. The electromagnetic relay of claim 2, wherein: The base and the middle cover are snap-connected, and the middle cover and the shell are snap-connected.

9. The electromagnetic relay according to any one of claims 1 to 5, characterized in that: The contact part comprises a contact support, a moving contact part arranged on the contact support, and a static contact part matched with the moving contact part, the static contact part is provided with the contact lead-out pin, and one end of the push rod cooperates with the contact support to drive the moving contact part and the static contact part to close or disconnect.

10. The electromagnetic relay according to claim 9, characterized in that: The moving contact part comprises a moving contact bridge, and the static contact part comprises two static contacts, each of the two static contacts is provided with a static contact point, and the two ends of the moving contact bridge are respectively provided with moving contact points arranged opposite to the static contact points on the two static contacts; a contact spring is arranged between the moving contact bridge and the contact support, and the contact spring is located on the side of the moving contact bridge opposite to the static contact; a reset spring is arranged between the contact support and the base, and is used for driving the contact support to reset in the direction of disconnecting the moving contact points and the static contact points.

11. The electromagnetic relay of claim 9, wherein: The moving contactor parts and the static contactor parts are respectively provided in plural, the plural moving contactor parts are distributed along the length direction of the contactor support on the same contactor support, the plural static contactor parts correspond to the plural moving contactor parts one by one, the base is provided with plural partition cavities distributed along the length direction of the contactor support and separated from each other, the plural partition cavities correspond to the plural moving contactor parts one by one, and each moving contactor part and static contactor part is respectively arranged in the corresponding partition cavity.

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