CN221613798U - Electromagnetic relay - Google Patents

Abstract

The utility model relates to the technical field of switching appliances, in particular to an electromagnetic relay, which comprises a base, an action part and a coil component, wherein the coil component comprises a coil terminal, a coil and a coil frame provided with an isolation flange, the isolation flange is provided with a first space towards a first end, the action part is arranged in the first space, the isolation flange is also connected with a mounting part extending towards the first end, the base is provided with a through hole, one end of the mounting part is convexly provided with a plug-in part, the plug-in part penetrates through the first space and is inserted in the through hole, the coil terminal is arranged at the mounting part, and the end part of the coil terminal extends out of the base to form a coil pin, so that the mounting part isolates the coil terminal in the first space and increases the creepage distance. The installation department forms the cartridge with the base and is connected, can enough form the installation location between installation department and the base, the assembly of the relay of being convenient for can also make coil terminal and current-carrying return circuit form the physical isolation in first space, increase coil terminal and current-carrying return circuit's creepage distance, improve the withstand voltage performance of relay.

Description

Electromagnetic relay

Technical Field

The utility model relates to the technical field of switching appliances, in particular to an electromagnetic relay.

Background

The electromagnetic relay comprises a shell, a coil assembly and an action part, wherein the coil assembly and the action part are arranged in the shell, the coil assembly comprises a coil and a coil terminal penetrating through the shell, one end of the coil terminal protrudes out of the shell of the relay, and the other end of the coil terminal penetrates through the shell and the action part action area and is arranged on a flange of the coil frame. The current-carrying loop (the static spring pin, the static contact, the movable contact and the movable spring pin which are electrically connected) of the relay is arranged in the action area of the action part, the coil terminal passes through the action area of the action part, and the coil terminal is in an exposed state in the area, so that the gap between the charged current-carrying loop and the coil terminal is small, the creepage distance is insufficient, and voltage breakdown can be caused.

In addition, when the contact is closed or opened by the action of the action member under the action of the coil assembly, metal splashes generated by the contact are accumulated near the exposed coil terminal, so that the creepage distance between the coil terminal and the current-carrying loop is reduced, and a problem of breakdown voltage is also caused.

Disclosure of Invention

The utility model aims to provide an electromagnetic relay, which is used for solving the problem of breakdown voltage caused by accumulation of metal splashes near an exposed coil terminal.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides an electromagnetic relay, includes base, action part and coil pack, action part drives the relative stationary contact action of movable contact in order to realize closure or disconnection, the coil pack includes coil terminal, coil and is equipped with the coil former of isolation flange to the one end of isolation flange orientation base is first end, and the other end that deviates from is the second end with it, isolation flange orientation first end and with the base forms first space, action part sets up in first space, the coil sets up isolation flange orientation second space of second end, isolation flange still is connected with the installation department that extends towards first end, the base is equipped with the through-hole, the protruding grafting portion that is equipped with of one end of installation department, the grafting portion runs through first space cartridge is in the through-hole, the coil terminal sets up the installation department and its tip stretches out the base and forms the coil pin, thereby the installation department keeps apart the coil terminal in first space, increases creepage distance.

In one embodiment, the mounting portion is integrally connected with the isolation flange.

In one embodiment, the mounting part is provided with a mounting groove penetrating from the second space to the base, and the coil terminal is inserted into the mounting groove; and a gap between the plugging part of the mounting part and the through hole of the base and/or a gap between the mounting groove and the coil terminal is filled with colloid.

In one embodiment, the mounting portion is disposed in a fully enclosed configuration around the coil terminal within the first space.

In one embodiment, the coil terminal includes a connection section and an extraction section, the connection section extending beyond the mounting portion and toward the second space for electrical connection with the coil; one part of the lead-out section is positioned at the mounting part, and the other part extends out of the base to form the coil pin.

In one embodiment, the coil terminal has a zigzag structure, and includes a lead-out portion, a connection portion, and a bent portion disposed between the lead-out portion and the connection portion, wherein the lead-out portion extends from the base to form the coil pin, the connection portion extends beyond the mounting portion and faces the second space, and is electrically connected to the coil, and the connection portion is farther from the coil center in the coil radial direction with respect to the lead-out portion.

In one embodiment, the mounting portion is provided with a mounting groove penetrating from the second space to the base, an end face of the mounting portion in the direction of the first end of the isolation flange is defined to be a first end face, the coil terminal further comprises a contact portion inserted into the mounting groove, the bending portion is located between the contact portion and the lead-out portion, and the bending portion abuts against the first end face of the mounting portion to form mounting limit of the coil terminal.

In one embodiment, the coil terminal is made of sheet metal, and includes a lead-out portion provided with a thickened structure so that a maximum thickness of the lead-out portion is greater than a thickness of other portions of the coil terminal than the lead-out portion in a thickness direction of the sheet metal.

In one embodiment, the thickened structure of the lead-out part is formed by providing a protrusion on the lead-out part, or the thickened structure is formed by providing a lamination structure formed by folding sheet metal on the lead-out part.

In one embodiment, the coil frame is further provided with a limit flange at the other end of the coil frame relative to the isolation flange, the coil is wound between the isolation flange and the limit flange, and the coil frame further comprises a shell, the shell is covered on the base, and the shell and the coil frame form the second space, so that the coil is placed in the second space.

The utility model has the beneficial effects that:

1. According to the utility model, the mounting part extends to penetrate through the first space and is in plug-in connection with the base, so that on one hand, the mounting part and the base can be positioned for mounting the relay, and on the other hand, the coil terminal and the current-carrying loop can be physically isolated in the first space, the creepage distance of the coil terminal and the current-carrying loop is increased, and the voltage-resistant performance of the relay is improved.

2. The colloid filled in the matching position of the mounting part and the base can form a sealing structure, so that the physical isolation between the coil terminal and the current-carrying loop is more reliable.

3. The mounting part can form a splash guard in the first space to achieve splash protection of the coil terminal, prevent the coil terminal from shortening the creepage distance between the coil terminal and the current-carrying loop due to splashing of metal splashes nearby the coil terminal, and further improve the voltage-resisting performance of the relay.

4. The mounting portion of the fully enclosed structure can form more reliable physical isolation and more comprehensive protection for the coil terminals, and the fully enclosed structure can also form circumferential limit for the coil terminals.

5. The coil terminal with the Z-shaped structure can enable the position of the lead-out part to be matched with the mounting hole site of an external electric device, and can also ensure that the coil has a large enough winding space.

6. The thickened structure is arranged at the leading-out part, so that the size matching of the thickened structure and the installation hole site of an external electric device can be ensured, and other parts of the coil terminal except the leading-out part can be designed in a thinning manner, so that the material is saved and the cost is reduced under the condition that the installation of a relay is not influenced.

Drawings

Fig. 1 is a perspective view of an embodiment of the present utility model.

Fig. 2 is a top view of an embodiment of the present utility model.

Fig. 3 is a cross-sectional view A-A of fig. 2.

Fig. 4 is a perspective view of a coil assembly according to an embodiment of the present utility model.

Fig. 5 is a perspective view of a coil terminal according to an embodiment of the present utility model.

Fig. 6 is a perspective view of a coil terminal according to an embodiment of the present utility model.

Fig. 7 is a perspective view of a coil terminal according to another embodiment of the present utility model.

Fig. 8 is a perspective view of a coil terminal according to another embodiment of the present utility model.

Fig. 9 is a perspective view of a coil terminal in the related art.

Wherein: 1 base, 10 shell, 11 through holes, 2 coil terminals, 201 connecting sections, 202 leading-out sections, 21 leading-out sections, 211 convex buds, 212 lamination structures, 22 connecting sections, 23 bending sections, 24 contact sections, 241 clamping bulges, 3 coil frames, 31 isolation flanges, 32 limit flanges, 33 mounting sections, 331 mounting grooves, 332 upper end surfaces, 4 coils, 5 iron cores, 6 armatures, 7 moving spring parts, 71 moving contacts, 72 moving spring pins, 73 flexible conductive pieces, 74 moving spring pieces, 8 static spring parts, 81 static contacts, 82 static spring pins, 100 moving parts and 200 coil assemblies.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

Referring to fig. 1 to 4, the utility model discloses an electromagnetic relay, which comprises a base 1, an action part 100 and a coil assembly 200, wherein a shell 10 is covered on the base 1, the coil assembly 200 comprises coil terminals 2 and a coil frame 3, the coil terminals 2 are symmetrically arranged, two isolation flanges 31 and limit flanges 32 are respectively arranged at two ends of the coil frame 3, a coil 4 is wound between the isolation flanges 31 and the limit flanges 32 of the coil frame 3, one end of the coil terminal 2 is electrically connected with the coil 4, and the other end of the coil terminal 2 protrudes out of the base 1 to form a coil pin. The coil assembly 200 further includes a core 5 disposed within the coil 4, and the coil 4 is energized to magnetize the core 5 to create a magnetic attraction force. The end of the isolation flange 31 facing the base 1 is a first end, the other end facing away from the isolation flange 31 is a second end, the isolation flange 31 faces the first end and forms a first space A1 with the base 1, the operation component 100 is arranged in the first space A1, and the coil 4 is arranged in a second space A2 of the isolation flange 31 facing the second end.

The actuating member 100 is configured to drive the movable contact to move relative to the stationary contact under the action of the coil assembly 200 to be closed or opened, the actuating member 100 is disposed in the first space A1, the actuating member 100 includes the armature 6 and the movable spring portion 7, the movable contact 71 is disposed at the end of the movable spring portion 7, the first space A1 is further provided with the stationary spring portion 8, the stationary spring portion 8 includes the stationary contact 81 corresponding to the movable contact 71, and the actuating member 100 moves to drive the movable contact 71 to be closed or opened with the stationary contact 8. The movable spring part 7 is also provided with a movable spring pin 72 extending out of the base 1, a flexible conductive piece 73 for electrically connecting the movable spring pin 72 and the movable contact 71 is also arranged between the movable spring pin 72 and the movable contact 71, the static spring part 8 is provided with a static spring pin 82 extending out of the base 1, and the movable spring pin 72, the flexible conductive piece 73, the movable contact 71, the static contact 81 and the static spring pin 82 form a current-carrying loop of the relay.

Referring to fig. 3 and 4, the isolation flange 31 is connected with a mounting portion 33 extending toward the first end, the mounting portion 33 penetrates through the first space A1, the coil terminal 2 is disposed on the mounting portion 33, an inserting portion 333 is protruding at one end of the mounting portion 33 in the direction of the first end of the isolation flange, the inserting portion 333 of the mounting portion 33 is inserted into the through hole 11 of the base 1, so that not only can the mounting and positioning between the base 1 and the isolation flange 33 be formed, but also a physical isolation structure surrounding the coil terminal 2 can be formed in the first space A1 in combination with the isolation flange 31 and the base 1, the creepage distance between the coil terminal 2 and a current-carrying loop can be increased, electrical breakdown can be avoided, and the voltage withstand capability of the relay can be improved.

Further, the mounting portion 33 penetrates the first space A1 and forms a splash guard penetrating the first space A1, thereby forming splash protection for the coil terminal 2 in the first space A1. The isolation flange 31, the base 1 and the splash guard are combined in the first space A to form a barrier of the coil terminal, the coil terminal 2 and the contact are separated, metal splashes acting on the contact are prevented from splashing near the coil terminal 2, the creepage distance between the coil terminal 2 and the current-carrying loop is shortened, and electric breakdown is prevented from being generated between the coil terminal 2 and the current-carrying loop.

The gap between the plugging part 333 of the mounting part 33 and the through hole 11 of the base 1 is filled with colloid, so that on one hand, the gap between the plugging part 333 and the through hole 11 can be filled, the reliability of electrical isolation between the coil terminal 2 and the current-carrying loop is improved, and electrical breakdown is further prevented; on the other hand, a sealed connection between the base 1 and the mounting portion 33 can be formed, so that the base 1 and the housing 10 cooperate to form a sealed relay case. Referring to fig. 3 and 4, the mounting portion 33 is disposed in a fully enclosed structure on the outer periphery of the coil terminal 2, more specifically, on the circumferential outer periphery of the coil terminal 2, and a through groove is formed in the middle of the mounting portion 33, and penetrates through the body of the mounting portion 33 to form a mounting groove 331, and the coil terminal 2 is inserted into the mounting groove 331 in such a manner that both ends thereof protrude from the mounting groove 331, so that the coil terminal 2 is enclosed by the mounting portion 33 in the first space A1. In addition, the mounting groove 331 inside the mounting portion 33 of the fully-enclosed structure can also provide circumferential limitation for the coil terminal 2, so that the stress of the coil terminal 2 is more uniform.

In this example, the mounting portion 33 is disposed on the periphery of the coil terminal 2 in a fully-enclosed structure, and in other embodiments, since the current-carrying circuit is disposed on one side of the coil terminal, the mounting portion 33 may also form a semi-enclosed structure with respect to the coil terminal, so as to form a semi-enclosed protection outside the coil terminal 2, but the protection direction should be between the coil terminal 2 and the current-carrying circuit, and the extension of the semi-enclosed structure in the circumferential direction of the coil terminal 2 should be such that the coil terminal 2 has a sufficient creepage distance with the current-carrying circuit and the iron core.

In this example, the mounting portion 33 is integrally formed on the bobbin 3, so that the mounting portion 33 is integrally connected with the isolation flange 31. In other embodiments, the mounting portion 33 may be formed separately from the coil former, for example, the mounting portion 33 may be a separate piece or integrally formed with the base 1, such that the mounting portion 33 forms a separate, fixed connection with the isolation flange 31.

The coil terminal 2 includes a connection section 201 and a lead-out section 202, the connection section 201 exceeding the mounting portion 33 and facing the second space A2, so that in the second space A2, the connection section 201 forms a connection portion 22 for connection with the coil 4. One part of the lead-out section 202 is positioned on the mounting part 33 to form the contact part 24, and the other part extends out of the base to form the lead-out part 21, and the lead-out part 21 forms a coil pin. The contact portion 24 is inserted into the mounting groove 331, the end surface of the mounting portion 33 in the first end direction of the isolation flange is a first end surface 332, and the bending portion 23 abuts against the first end surface 332 of the mounting portion 33 to form a mounting limit of the coil terminal 2 in the Z-axis direction. The width of the contact portion 24 is large relative to the widths of the connection portion 22 and the lead-out portion 21 so as to match the width of the mounting groove 331, and the larger width also increases the strength of the coil terminal. The connection portion 22 is provided with a plurality of winding grooves at intervals for winding.

The coil terminal 2 has a zigzag structure, and further includes a bent portion 23 provided between the lead portion 21 and the connection portion 22, more specifically, the bent portion 23 is provided between the contact portion 24 and the lead portion 21. The bending direction of the bending portion 23 makes the connection portion 22 farther from the coil center in the coil radial direction with respect to the lead portion 21. The coil terminals 2 with the zigzag structure can match the positions of the lead-out parts 21 with the mounting hole positions of the external electric devices, and can also enlarge the space between the connecting parts 22 of the two coil terminals 2, thereby enlarging the winding space of the coil 4, and increasing the winding space without enlarging the size of the electromagnetic relay, and increasing the magnetic attraction force under the same power supply voltage. In this example, the bending portion 23 is provided between the contact portion 24 and the lead portion 21. In other embodiments, the bending portion 23 may be disposed between the contact portion 24 and the connection portion 22, where the bending portion 23 is located in the second space A2, but the bending direction is such that the connection portion 22 is farther from the center of the coil in the coil radial direction relative to the lead portion 21.

Referring to fig. 5 to 8, the contact portion 24 is inserted into the mounting groove 331, and for the purpose of being inserted more tightly, the contact portion 24 of the coil terminal 2 is provided with a first protruding clamping structure, and the mounting groove 331 is provided with a corresponding second clamping structure to cooperate with the clamping structure of the connecting portion 22, so as to form the insertion fixation of the coil terminal 2. In this example, the first clamping structure is a clamping protrusion 241 protruding from one side of the contact portion 24, and the second clamping structure is a clamping groove disposed on an inner wall of the mounting groove 331, and in other embodiments, the clamping protrusion and the clamping groove may be exchanged, so that the clamping groove is disposed on one side of the contact portion 24, and the protruding clamping protrusion is disposed on the inner wall of the mounting groove 331.

In addition, the gap between the mounting groove 331 and the coil terminal 2 is also filled with a sealing colloid, so that the fixing strength of the coil terminal 2 in the mounting groove 331 is improved, and the sealing between the mounting groove 331 and the coil terminal 2 is realized.

Referring to fig. 9, the conventional coil terminal 2 is made of sheet metal, in order to save materials and reduce cost, in this example, the coil terminal 2 is formed by bending a thinned sheet metal, and the thickness of the lead-out portion 21 should be kept at 0.8mm due to the limitation of the mounting hole site of the external component of the electromagnetic relay, while in this example, the thickness of the lead-out portion 21 is made of thinned sheet metal with a thickness less than 0.8mm, so that the external component cannot be matched, and the electromagnetic relay cannot be used. In order to solve this problem, as shown in fig. 5 to 8, a thickening structure is provided on the lead-out portion 21, which thickening structure makes the maximum thickness of the lead-out portion 21 larger than the thickness of the other portions of the coil terminal 2 than the lead-out portion 21, i.e., the thickness of the lead-out portion 21 larger than the thicknesses of the connection portion 22 and the bent portion 23 in the thickness direction of the sheet metal.

The maximum thickness of the lead-out portion 21 refers to the thickness of a portion of the lead-out portion 21 having a thickened structure, which may be formed by punching out a protrusion 211 on the lead-out portion 21, as shown in fig. 5 and 6, or may be formed by folding a sheet metal at the lead-out portion 21 from one side to form a laminated structure 212, as shown in fig. 7 and 8. In the solutions of the punch bud shown in fig. 5 and 6, the maximum thickness a of the lead-out portion 21 is the distance from the apex of the bud on one side of the lead-out portion 21 to the other side of the lead-out portion 21. In the lamination structures shown in fig. 7 and 8, since the lamination structure is formed by folding sheet metal, and in order to reduce the number of sheet metal, the coil terminal is formed by bending a sheet metal, the thickness of the sheet metal should be an integer multiple of 0.8mm, for example, 0.4mm or 0.2mm, and in this example, 0.4mm, and the maximum thickness a of the lead portion 21 refers to the distance between both sides of the lead portion 21 formed by folding the sheet metal.

Referring to fig. 1 to 3, the housing 10 is covered on the base 1, and the housing 10 and the coil frame 3 form a second space A2, so that the coil 4 is disposed in the second space A2. The second space A2 can prevent metal spatter generated by the contact operation from splashing into the second space A2, thereby protecting the connection portion 22 of the coil 4 and the coil terminal 2 in the second space A2 from splashing, and also preventing the current-carrying circuit in the first space A1 from electrical breakdown from occurring in the connection portion 22 of the coil 4 and the coil terminal 2 in the second space A2. More specifically, the first space A1 is a space formed by the coil bobbin 3, the base 1, and the case 10, and the operating member 100 is operable in the first space A1 to close or break the movable contact 41 located in the first space A1 with respect to the stationary contact 27, and a splash zone of metal splashes generated by the contacts is in the first space A1.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that the remaining non-illustrated portions are prior art and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides an electromagnetic relay, includes base, action part and coil pack, action part drives the action of the relative stationary contact of movable contact in order to realize closure or disconnection, the coil pack includes coil terminal, coil and is equipped with the coil holder of isolation flange to the one end of isolation flange orientation base is first end, and the other end that deviates from with it is the second end, isolation flange orientation first end and with the base forms first space, action part sets up in first space, the coil sets up isolation flange orientation second space, its characterized in that: the isolation flange is further connected with a mounting part extending towards the first end, the base is provided with a through hole, one end of the mounting part is convexly provided with a plug-in part, the plug-in part penetrates through the first space and is plugged in the through hole, and the coil terminal is arranged on the mounting part, the end part of the coil terminal extends out of the base to form a coil pin, so that the mounting part isolates the coil terminal in the first space, and the creepage distance is increased.

2. The electromagnetic relay according to claim 1, wherein: the mounting portion is integrally connected with the isolation flange.

3. The electromagnetic relay according to claim 1, wherein: the mounting part is provided with a mounting groove which is communicated from the second space to the base, and the coil terminal is inserted into the mounting groove; and a gap between the plugging part of the mounting part and the through hole of the base and/or a gap between the mounting groove and the coil terminal is filled with colloid.

4. The electromagnetic relay according to claim 1, wherein: in the first space, the mounting portion is arranged on the periphery of the coil terminal in a fully enclosed structure.

5. The electromagnetic relay according to claim 1, wherein: the coil terminal comprises a connecting section and a leading-out section, and the connecting section extends out of the mounting part and faces the second space for being electrically connected with the coil; one part of the lead-out section is positioned at the mounting part, and the other part extends out of the base to form the coil pin.

6. The electromagnetic relay according to claim 1, wherein: the coil terminal is of a Z-shaped structure and comprises a lead-out portion, a connecting portion and a bending portion, wherein the bending portion is arranged between the lead-out portion and the connecting portion, the lead-out portion extends from the base to form a coil pin, the connecting portion extends beyond the mounting portion and faces the second space and is used for being electrically connected with the coil, and the connecting portion is farther away from the center of the coil in the radial direction of the coil relative to the lead-out portion.

7. The electromagnetic relay according to claim 6, wherein: the installation part is equipped with from the second space extremely link up the mounting groove between the base defines the terminal surface of installation part in isolation flange first end direction is first terminal surface, the coil terminal still includes the cartridge contact portion in the mounting groove, the kink is located between contact portion with the portion of drawing forth, the kink is supported and is in the first terminal surface of installation part forms the installation spacing of coil terminal.

8. The electromagnetic relay according to claim 1, wherein: the coil terminal is made of sheet metal and comprises a lead-out portion provided with a thickening structure, so that the maximum thickness of the lead-out portion is larger than the thickness of other portions of the coil terminal except the lead-out portion in the thickness direction of the sheet metal.

9. The electromagnetic relay according to claim 8, wherein: the thickening structure of the leading-out part is formed by arranging a protrusion on the leading-out part, or is formed by arranging a lamination structure formed by folding sheet metal on the leading-out part.

10. The electromagnetic relay according to claim 1, wherein: the coil rack is also provided with a limit flange which is positioned at the other end of the coil rack relative to the isolation flange, the coil is wound between the isolation flange and the limit flange, the coil rack further comprises a shell, the shell is covered on the base, and the shell and the coil rack form a second space, so that the coil is placed in the second space.