A low-height dual-coil snap-action electromagnetic relay

Abstract

This invention discloses a low-height dual-coil snap-fit ​​electromagnetic relay, comprising a base, a housing, two magnetic circuit sections, and two moving spring armature components. The magnetic circuit sections are mounted on the base, with the axis of the coils in the magnetic circuit sections arranged vertically. The two moving spring armature components respectively cooperate with the two magnetic circuit sections. The housing is cover-shaped, with its opening on the side. The invention is characterized in that the base, which assembles the magnetic circuit sections and the moving spring armature components, is tilted and housed within the housing. This invention ensures that the installation direction of the relay is perpendicular to the plane containing the axes of the two sets of coil assemblies, thereby reducing the height dimension of the relay in the installation direction by using two sets of coils.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to a low-height dual-coil snap-fit ​​electromagnetic relay. Background Technology

[0002] A relay is an electrical control device that plays a role in automatic adjustment, safety protection, and circuit switching in circuits. Products with currents greater than or equal to 80A require high-current relays. However, high-current relays are generally large in size (length, width, and height), and in certain applications, the installation height may be limited, thus only flat (low-profile) relays can be installed. Furthermore, most existing high-voltage, high-current relays use a structure with one moving contact at each end of a contact bridge, i.e., two pairs of moving and stationary contacts connected in series. However, if a foreign object enters one of the contact pairs and causes a loss of conductivity, the entire relay will fail, resulting in poor reliability. Moreover, high-current relays require sufficient contact pressure, which necessitates a sufficiently large coil to provide the corresponding suction force. The large coil size and overall large relay size prevent the relay from being minimizing its installation height. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a low-height dual-coil snap-fit ​​electromagnetic relay, which adopts a dual-coil structure (i.e., two magnetic circuit parts), ensuring sufficient electromagnetic attraction between each pair of moving contacts while reducing the size of the relay in the installation height direction.

[0004] The technical solution adopted by this invention to solve its technical problem is: a low-height dual-coil snap-fit ​​electromagnetic relay, comprising a base, a housing, two magnetic circuit parts, and two moving spring armature components; the magnetic circuit parts are mounted on the base, and the axis of the coil in the magnetic circuit parts is arranged vertically; the two moving spring armature components respectively cooperate with the two magnetic circuit parts; the housing is cover-shaped, and its opening is located on the side; the characteristic is that the base, which is equipped with the magnetic circuit parts and the moving spring armature parts, is tilted and housed in the housing, so that the installation direction of the relay is perpendicular to the plane where the axes of the two sets of coil assemblies are located, thereby reducing the height dimension of the relay in the installation direction.

[0005] Furthermore, it also includes a stationary spring portion; the stationary spring portion is mounted on the base and the lead-out portion of the stationary spring portion extends from the side of the relay; the stationary spring portion includes two stationary spring plates for realizing the inflow and outflow of current; the two stationary spring plates respectively cooperate with two moving spring armature components, so that the installed relay has no yoke and the cooperating part of the moving and stationary springs in the height direction corresponding to the coil, thereby reducing the height of the relay.

[0006] Furthermore, the mating part of the moving and stationary springs includes a stationary contact portion provided on the two stationary spring plates and a moving contact portion provided on the two moving spring armature components, forming a parallel circuit of two contacts between the two stationary spring plates.

[0007] Furthermore, each of the two moving spring armature components is provided with two moving contact portions connected in a bridge manner, and each of the two stationary springs is provided with two stationary contact portions; the two moving contact portions of one of the moving spring armature components respectively correspond to and cooperate with one stationary contact portion of one stationary spring and one stationary contact portion of the other stationary spring, and the two moving contact portions of the other moving spring armature component respectively correspond to and cooperate with the other stationary contact portions of one stationary spring and the other stationary spring, thereby forming a two-way parallel contact circuit; or Each of the two moving spring armature components has only one moving contact portion, and each of the two stationary springs has only one stationary contact portion. The moving contact portion of one of the moving spring armature components is engaged with the stationary contact portion of one of the stationary springs, and the moving contact portion of the other moving spring armature component is engaged with the stationary contact portion of the other stationary spring. The moving spring of one of the moving spring armature components is connected to the other stationary spring via a flexible connecting wire, and the moving spring of the other moving spring armature component is connected to the stationary spring via a flexible connecting wire.

[0008] Furthermore, the movable spring armature component includes an armature and a movable spring; one end of the movable spring is fixed to the armature; the magnetic circuit portion includes a coil, a yoke, and an iron core; the coil includes a coil frame and enameled wire wound on the winding shaft of the coil frame; when the base and its magnetic circuit portion, movable spring armature portion, and stationary spring portion mounted on the base are not tilted; the coil frame is vertically distributed; the iron core is inserted into the iron core hole of the coil frame; the yoke is L-shaped, with one horizontal side of the L-shape of the yoke fixed to the bottom end of the iron core, and the vertical side of the L-shape of the yoke adapted to the side of the enameled wire; the armature is adapted to the knife edge at the upper end of the vertical side of the L-shape of the yoke; one end of the movable spring extends from the fixed part of the armature and is provided with a reset spring, and the other end of the reset spring is fixed to the vertical side of the L-shape of the yoke.

[0009] Furthermore, the other end of the moving spring is connected to a moving contact bridge or a soft copper wire; the moving contact part is a moving contact point, and each end of the moving contact bridge or soft copper wire is connected to a moving contact point; the static contact parts of the two stationary springs are stationary contacts, and the stationary contacts are fixed at the upper end of the corresponding stationary springs; the moving contacts are fixed at the lower end of the corresponding moving contact bridge or soft copper wire.

[0010] Furthermore, the movable spring is made of stainless steel and is I-shaped. The two horizontal segments of the I-shape are respectively connected to the armature and the movable contact bridge. The vertical segment of the I-shape oscillates elastically to drive the movable contact bridge to move.

[0011] Furthermore, mounting portions are provided in the two opposite side walls of the housing; when the base and its magnetic circuit portion, moving spring armature portion and stationary spring portion mounted on the base are not tilted, the coil frames of the two magnetic circuit portions are distributed on both sides of the length of the relay; the two stationary springs are distributed on both sides of the width of the relay, and the stationary spring portion with the stationary contact portion is folded towards the middle of the length of the relay.

[0012] Furthermore, the two stationary springs are distributed on both sides of the width of the relay; the two stationary contacts of each stationary spring are distributed along the length of the relay; the stationary contact portions of the two stationary springs are respectively stationary contacts, and the two stationary contacts of each stationary spring are distributed along the length of the relay; and the stationary contacts of the two stationary springs are aligned in the length of the relay, wherein the two stationary springs have a sheet-like structure and are distributed along the length of the relay; the upper end of the stationary spring is provided with a bent portion for fixing the stationary contacts; the lower part of the stationary spring is provided with a lead-out foot; the lead-out feet of the two stationary springs are staggered in the length of the relay.

[0013] Furthermore, the two stationary reeds are arranged in a rotationally symmetrical manner.

[0014] Furthermore, the relay also includes a PCB board; the coil frames of the two magnetic circuit sections are respectively fixed with coil terminals; the coil terminals of the two magnetic circuit sections are respectively connected to the PCB board and are electrically connected in parallel.

[0015] Furthermore, the PCB board is equipped with a control module; the control module outputs electrical signals to the two coils respectively, so that when the contacts are closed, one coil is powered on first, and the other coil is powered on after a preset time; when the contacts are open, the other coil is powered off first, and the first coil is powered off after a preset time; and / or, the two stationary springs are respectively provided with sampling protrusions, and the sampling protrusions of the two stationary springs are respectively inserted into the PCB board.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention employs a structure comprising a base, a housing, two magnetic circuit sections, and two moving spring armature components. The magnetic circuit sections are mounted on the base, with the axis of the coils within them vertically aligned. The two moving spring armature components are respectively matched with the two magnetic circuit sections. The housing is dome-shaped with its opening on the side. The base, housing the magnetic circuit sections and moving spring armature components, is tilted and housed within the housing, ensuring that the relay's mounting direction is perpendicular to the plane containing the axes of the two coil assemblies. By using two sets of coils, the height of the relay in the mounting direction is reduced. This structure, by tilting the base containing the magnetic circuit sections, moving spring armature components, and stationary spring components within the housing, lowers the relay's mounting height. Furthermore, high-current relays require sufficient contact pressure, which necessitates a sufficiently large coil to provide the corresponding attraction. A large coil volume results in a large relay overall size, making it impossible to reduce the size of the relay in one direction. Using a dual-coil relay ensures sufficient contact pressure while providing a sufficiently large coil to generate adequate magnetic force. This guarantees adequate electromagnetic attraction and also allows for a smaller overall size in one direction, reducing the relay's height during installation. Furthermore, for the same magnetic force, the length of enameled wire used with two coils is shorter than that used with a single coil, saving costs.

[0018] 2. Because the two moving spring armature components each have two moving contacts connected in a bridge configuration, and the two stationary springs each have two stationary contacts; the two moving contacts of one moving spring armature component respectively cooperate with one stationary contact of one stationary spring and one stationary contact of the other stationary spring, and the two moving contacts of the other moving spring armature component respectively cooperate with the other stationary contacts of one stationary spring and the other stationary spring, thus forming a parallel circuit of two contacts. This structure of the present invention improves the relay's short-circuit current withstand capability by using a parallel current-sharing method with two sets of contacts. Furthermore, the two sets of moving contacts operate freely without mutual interference; when one set of moving contacts fails, the other set can still operate independently, resulting in high overall reliability of the relay system.

[0019] 3. Due to the use of two stationary springs arranged in a sheet-like structure and distributed along the length of the relay; the upper end of each stationary spring has a bent portion for fixing the stationary contact; the lower part of each stationary spring has a lead-out pin; the leads of the two stationary springs are staggered along the length of the relay. The two stationary springs are arranged in a rotationally symmetrical manner. This structure of the present invention allows the relay to have a larger current-carrying area, making it suitable for high-current load environments of 80A and above.

[0020] 4. The relay also includes a PCB board; the coil frames of the two magnetic circuit sections are respectively fixed with coil terminals; the coil terminals of the two magnetic circuit sections are respectively connected to the PCB board and are electrically connected in parallel. This structure of the present invention replaces six conductive components with one PCB board (one component replaces six complex components), and the simple PCB board soldering process replaces snap-fit ​​and soldering, simplifying the assembly process. Furthermore, due to the maturity of the PCB board soldering process, the reliability of the entire relay system is guaranteed. Moreover, the coil is electrically connected to the PCB board through the coil terminals; if parallel resistors or diodes are needed at both ends of the coil, they can be directly added to the PCB without changing other components, which is very convenient.

[0021] 5. Due to the use of a control module installed in the PCB board, the control module outputs electrical signals to the two coils respectively, so that when the contacts are closed, one coil is connected to the power supply first, and the other coil is connected to the power supply after a preset time. When the contacts are opened, the other coil is disconnected from the power supply first, and the first coil is disconnected from the power supply after a preset time. In this structure of the present invention, when the moving and stationary contacts are in contact, one set of moving and stationary contacts contacts before the other set, so that the other set of moving and stationary contacts will not arc when they contact. When the moving and stationary contacts are separated, the other set of moving and stationary contacts disconnects first without arcing. One set of moving and stationary contacts is responsible for connecting and disconnecting the load and also carries current, while the other set of moving contact bridges is only responsible for carrying current. This allows the moving and stationary contacts that are only responsible for carrying current to use low contact resistance materials, while the moving and stationary contacts that are responsible for connecting and disconnecting the load use materials with strong arc breaking ability and ablation resistance. This reduces contact resistance to reduce heat generation and provides good load switching capability.

[0022] 6. Since the magnetic circuit components, moving spring armature components, and stationary springs on both sides use the same parts, there is no need to develop additional molds, thereby reducing costs.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the low-height dual-coil snap-fit ​​electromagnetic relay of the present invention is not limited to the embodiments. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0025] Figure 2 This is an exploded structural diagram of an embodiment of the present invention;

[0026] Figure 3 This is a top view of an embodiment of the present invention;

[0027] Figure 4 It is along Figure 3 Schematic diagram of the cross section at point AA;

[0028] Figure 5 This is a rear view of an embodiment of the present invention;

[0029] Figure 6 It is along Figure 5 Schematic diagram of the cross section at point BB;

[0030] Figure 7 It is along Figure 5 Schematic diagram of the cross section at point C;

[0031] Figure 8 It is along Figure 5 Schematic diagram of the cross section at DD;

[0032] Figure 9 This is a three-dimensional structural diagram of an embodiment of the present invention after removing the outer shell;

[0033] Figure 10 This is a three-dimensional structural diagram of an embodiment of the present invention after removing the outer shell and the base;

[0034] Figure 11 This is a three-dimensional structural diagram (flipped side) of an embodiment of the present invention after removing the outer shell and base;

[0035] Figure 12 This is a perspective view of an embodiment of the present invention with the outer shell and base removed and flipped upwards.

[0036] Figure 13 This is a perspective view of the embodiment of the present invention after removing the outer shell and base and flipping it upwards (flipped side);

[0037] Figure 14 This is a circuit diagram of the control module in the PCB board of an embodiment of the present invention;

[0038] Figure 15 This is a three-dimensional structural diagram of Embodiment 2 of the present invention after removing the outer shell;

[0039] Figure 16 This is a three-dimensional structural diagram of Embodiment 2 of the present invention after removing the outer shell (flipped at an angle);

[0040] Figure 17 This is a three-dimensional structural diagram of Embodiment 2 of the present invention after removing the outer shell and the moving spring armature component;

[0041] Figure 18 This is a top view of Embodiment 2 of the present invention after removing the outer casing and the moving spring armature component;

[0042] Figure 19This is a three-dimensional structural diagram of Embodiment 3 of the present invention after removing the outer shell;

[0043] Figure 20 This is a front view of Embodiment 3 of the present invention after the outer shell has been removed. Detailed Implementation

[0044] Example 1

[0045] See Figures 1 to 13 As shown, a low-height dual-coil snap-fit ​​electromagnetic relay of the present invention includes a base 6, a housing 7, two magnetic circuit parts 1 and 2, and two moving spring armature components 3 and 4. The magnetic circuit parts 1 and 2 are mounted on the base 6, and the axes of the coils in the magnetic circuit parts 1 and 2 are arranged vertically. The two moving spring armature components 3 and 4 respectively cooperate with the two magnetic circuit parts 1 and 2. The housing 7 is cover-shaped, and its opening is located on the side. The base 6, which is equipped with the magnetic circuit parts 1 and 2 and the moving spring armature parts 2 and 3, is tilted and housed in the housing 7, so that the installation direction of the relay is perpendicular to the plane where the axes of the two sets of coil assemblies 11 and 12 are located, thereby reducing the height dimension of the relay in the installation direction.

[0046] In this embodiment, it further includes a stationary spring portion 5; the stationary spring portion 5 is mounted on the base 6 and the lead-out portions 514 and 524 of the stationary spring portion 5 extend from the side of the relay; the stationary spring portion 5 includes two stationary spring plates 51 and 52 for realizing the inflow and outflow of current; the two stationary spring plates 51 and 52 respectively cooperate with two moving spring armature components 3 and 4, so that the installed relay has no yoke and the cooperating part of moving and stationary springs in the height direction corresponding to the coil, thereby reducing the height of the relay.

[0047] In this embodiment, the mating part of the moving and stationary springs includes a stationary contact portion provided on the two stationary spring plates 51 and 52 and a moving contact portion provided on the two moving spring armature components 3 and 4, forming a two-way contact parallel circuit between the two stationary spring plates 51 and 52.

[0048] In this embodiment, the moving spring armature component 3 is provided with two moving contact portions 311 and 312 connected in a bridge manner, the moving spring armature component 4 is provided with two moving contact portions 411 and 412 connected in a bridge manner, the stationary spring 51 is provided with two stationary contact portions 511 and 512, and the stationary spring 52 is provided with two stationary contact portions 521 and 522. The two moving contact portions 311 and 312 of the moving spring armature component 3 respectively correspond to and cooperate with the stationary contact portion 511 of the stationary spring 51 and the stationary contact portion 521 of the stationary spring 52, and the two moving contact portions 411 and 412 of the moving spring armature component 4 respectively correspond to and cooperate with the stationary contact portion 512 of the stationary spring 51 and the stationary contact portion 522 of the stationary spring 52, thereby forming a two-way contact parallel circuit.

[0049] In this embodiment, the movable spring armature component 3 includes an armature 32 and a movable spring 31; one end of the movable spring 31 is fixed to the armature 32. The movable spring armature component 4 includes an armature 42 and a movable spring 41; one end of the movable spring 41 is fixed to the armature 42. The magnetic circuit part 1 includes a coil assembly 11, a yoke 12, and an iron core 13; the coil assembly 11 includes a coil frame 111 and enameled wire 112 (i.e., a coil) wound on the winding shaft of the coil frame 111; the magnetic circuit part 2 includes a coil assembly 21, a yoke 22, and an iron core 23; the coil assembly 21 includes a coil frame 211 and enameled wire 212 (i.e., a coil) wound on the winding shaft of the coil frame 211. When the base 6 and its magnetic circuit parts 1 and 2, moving spring armature parts 3 and 4 and stationary spring part 5 mounted on the base 6 are not tilted, the coil frame 111 is vertically distributed; the iron core 13 is inserted into the iron core hole of the coil frame 111; the yoke 12 is L-shaped, the horizontal side of the L-shape of the yoke 12 is fixed to the bottom end of the iron core 13, the vertical side of the L-shape of the yoke 12 is adapted to the side of the enameled wire 112, and the armature 32 is adapted to the knife edge at the upper end of the vertical side of the L-shape of the yoke 12; one end of the moving spring 31 extends from the fixed part of the armature 32 and is provided with a reset spring 313, and the other end of the reset spring 313 is fixed to the vertical side of the L-shape of the yoke 12. The coil frame 211 is vertically distributed; the iron core 23 is inserted into the iron core hole of the coil frame 211; the yoke 22 is L-shaped, with the horizontal side of the L-shape of the yoke 22 fixed to the bottom end of the iron core 23, and the vertical side of the L-shape of the yoke 22 adapted to the side of the enameled wire 212; the armature 42 is adapted to the knife edge at the upper end of the vertical side of the L-shape of the yoke 22; one end of the movable spring 41 extends from the fixed part of the armature 42 and is provided with a reset spring 413, and the other end of the reset spring 413 is fixed to the vertical side of the L-shape of the yoke 22.

[0050] In this embodiment, the other end of the movable spring 31 is connected to the movable contact bridge 33; the movable contact portions 311 and 312 are movable contacts, and each end of the movable contact bridge 33 is connected to a movable contact. Similarly, the other end of the movable spring 41 is connected to the movable contact bridge 43; the movable contact portions 411 and 412 are movable contacts, and each end of the movable contact bridge 43 is connected to a movable contact. In other embodiments, the other ends of the movable springs 31 and 41 can be connected to soft copper wires, with each end of the soft copper wire connected to a movable contact.

[0051] In this embodiment, the movable springs 31 and 41 are made of stainless steel and are only responsible for reaction force, not for current carrying. The movable spring 31 is I-shaped, with its two horizontal segments connecting the armature 32 and the movable contact bridge 33, respectively. The movable spring 41 is I-shaped, with its two horizontal segments connecting the armature 42 and the movable contact bridge 43, respectively. The vertical segment of the I-shaped spring elastically swings to drive the movable contact bridges 33 and 43 to move. The movable contact bridges 33 and 43 are limited in their swing direction by a limiting piece 61, which is installed in the middle of the base.

[0052] In this embodiment, mounting portions 71 and 72 are respectively provided in the two opposite side walls of the outer casing 7; when the base 6 and its magnetic circuit portions 1 and 2, moving spring armature portions 3 and 4 and stationary spring portions 5 assembled on the base 6 are not tilted, the coil frames 111 and 211 of the two magnetic circuit portions 1 and 2 are distributed on both sides of the length of the relay; the two stationary springs 51 and 52 are distributed on both sides of the width of the relay, and the stationary spring portions with stationary contacts are folded toward the middle of the length of the relay.

[0053] In this embodiment, the two stationary springs 51 and 52 are distributed on both sides of the width of the relay; the stationary contact portions 511, 512, 521, and 522 of the two stationary springs 51 and 52 are stationary contacts, and the two stationary contacts of each stationary spring are distributed along the length direction of the relay; the stationary contacts of the two stationary springs 51 and 52 are aligned in the length direction of the relay, wherein the two stationary springs 51 and 52 have a sheet-like structure and are distributed along the length direction of the relay; the upper ends of the stationary springs 51 and 52 are respectively provided with bent portions 513 and 523 for fixing the stationary contacts; the lower parts of the stationary springs 51 and 52 are provided with lead-out feet 514 and 524; the lead-out feet of the two stationary springs 51 and 52 are staggered in the length direction of the relay.

[0054] In this embodiment, the two stationary springs 51 and 52 are arranged in a rotationally symmetrical manner. The two stationary springs 51 and 52 are the same part, and the structure is simple, with a large current-carrying cross-sectional area and no bottleneck in the current-carrying path.

[0055] In this embodiment, the relay also includes a PCB board 8; the coil frames 111 and 211 of the two magnetic circuit parts are respectively fixed with coil terminals 1111 and 2111; the coil terminals 1111 and 2111 of the two magnetic circuit parts 1 and 2 are respectively connected to the PCB board 8 and are connected in parallel.

[0056] In this embodiment, the PCB board 8 is equipped with a control module. The control module outputs electrical signals to the two coil assemblies 11 and 21 respectively, so that when the contacts are closed, coil assembly 11 is powered on first, and coil assembly 12 is powered on after a preset time. When the contacts are open, coil assembly 12 is powered off first, and coil assembly 11 is powered off after a preset time. The two stationary springs 51 and 52 are respectively provided with sampling protrusions 515 and 525, which are respectively inserted into the PCB board 8.

[0057] In this embodiment, as Figure 14 As shown, the following is one way to achieve the timing requirements for the on and off of coils 11 and 21:

[0058] 1. The client supplies 12VDC power to terminals #2 and #3.

[0059] 2. The control module X immediately supplies 12VDC power to Coil1, the coil drive contacts 1a and 1b close, and the main circuits A and B are connected.

[0060] 3. 15ms after Coill is powered on, the control module X supplies 12VDC power to Coil2, and the coil drive contacts 2a and 2b close.

[0061] 4. The client disconnects power to both #2 and #3.

[0062] 5. Control module X immediately cuts off power to Coil2, and contacts 2a and 2b disconnect.

[0063] 6. 10ms after Coil2 is de-energized, component R de-energizes Coil1, contacts 1a and 1b open, and main circuits A and B are disconnected.

[0064] This invention discloses a low-height dual-coil snap-fit ​​electromagnetic relay. It comprises a base 6, a housing 7, two magnetic circuit parts 1 and 2, and two moving spring armature components 3 and 4. The magnetic circuit parts 1 and 2 are mounted on the base, with the axes of the coils in the magnetic circuit parts 1 and 2 arranged vertically. The two moving spring armature components 3 and 4 respectively cooperate with the two magnetic circuit parts 1 and 2. The housing 7 is cover-shaped with its opening on the side. The base, housing the magnetic circuit parts 1 and 2 and the moving spring armature parts 3 and 4, is tilted and housed within the housing 7, ensuring that the relay's mounting direction is perpendicular to the plane containing the axes of the two sets of coil assemblies. By using two sets of coils, the height of the relay in the mounting direction is reduced. This structure of the invention, by tilting the base housing the magnetic circuit parts, moving spring armature parts, and stationary spring parts within the housing, reduces the relay's mounting height. Furthermore, high-current relays require sufficient contact pressure, which in turn necessitates a sufficiently large coil to provide the corresponding magnetic force. A large coil results in a large relay overall size, making it impossible to reduce the size of the relay in one direction. Using a dual-coil system ensures sufficient contact pressure while providing a sufficiently large coil to deliver the appropriate magnetic force. This guarantees adequate electromagnetic attraction while allowing for a reduction in the relay's size in one direction, thus decreasing its height during installation. Simultaneously, for the same magnetic force, the length of enameled wire used with two sets of coils is shorter than that used with a single set, saving costs.

[0065] This invention discloses a low-height dual-coil snap-fit ​​electromagnetic relay, employing two moving spring armature components 3 and 4 each having two moving contacts connected in a bridge configuration, and two stationary springs 51 and 52 each having two stationary contacts. The two moving contacts of one of the moving spring armature components respectively engage with one stationary contact of one stationary spring and one stationary contact of the other stationary spring; similarly, the two moving contacts of the other moving spring armature component respectively engage with the other stationary contacts of one stationary spring and another stationary contact of the other stationary spring, thereby forming a parallel circuit of two contacts. This structure of the invention improves the relay's short-circuit current withstand capability by using a parallel current-sharing method with two sets of contacts. Furthermore, the two sets of moving contacts operate freely without mutual interference; when one set of moving contacts fails, the other set can still operate independently, resulting in high overall system reliability of the relay.

[0066] This invention discloses a low-height dual-coil snap-fit ​​electromagnetic relay, employing two stationary springs 51 and 52 arranged in a plate-like structure along the length of the relay. The upper ends of the stationary springs 51 and 52 are respectively provided with bent portions 513 and 523 for fixing the stationary contacts; the lower parts of the stationary springs 51 and 52 are provided with lead-out pins 514 and 524; the lead-out pins of the two stationary springs 51 and 52 are staggered along the length of the relay. This rotationally symmetrical arrangement of the two stationary springs 51 and 52 results in a larger current-carrying area for the relay, making it suitable for high-current load environments exceeding 80A.

[0067] This invention discloses a low-height dual-coil snap-fit ​​electromagnetic relay, which further includes a PCB board 8. The coil frames 111 and 211 of the two magnetic circuit sections are respectively fixed with coil terminals 1111 and 2111. The coil terminals 1111 and 2111 of the two magnetic circuit sections 1 and 2 are respectively connected to the PCB board 8 in parallel electrical connection. This structure of the invention replaces six conductive components with one PCB board (one component replaces six complex components), and the simple PCB board soldering process replaces snap-fit ​​and soldering, simplifying the assembly process. Furthermore, due to the maturity of the PCB board soldering process, the reliability of the entire relay system is guaranteed. The coil is electrically connected to the PCB board through the coil terminals. If resistors or diodes are required to be connected in parallel at both ends of the coil, they can be directly added to the PCB without changing other components, which is very convenient.

[0068] The present invention discloses a low-height dual-coil snap-fit ​​electromagnetic relay, wherein the PCB board 8 is equipped with a control module; the control module outputs electrical signals to the two coils 11 and 21 respectively, such that when the contacts are closed, one coil is connected to the power supply first, and the other coil is connected to the power supply after a preset time; when the contacts are opened, the other coil is disconnected from the power supply first, and the first coil is disconnected from the power supply after a preset time. In this structure of the present invention, when the moving and stationary contacts come into contact, one set of moving and stationary contacts contacts the other set before the other set, so that the other set of moving and stationary contacts will not arc when they come into contact. When the moving and stationary contacts separate, the other set of moving and stationary contacts disconnects first without arcing. One set of moving and stationary contacts is responsible for connecting and disconnecting the load and also carries current, while the other set of moving contact bridges is only responsible for carrying current. This allows the moving and stationary contacts that are only responsible for carrying current to be made of low contact resistance materials, while the moving and stationary contacts that are responsible for connecting and disconnecting the load are made of materials with strong arc breaking ability and ablation resistance. This reduces contact resistance to reduce heat generation and also provides good load switching capability.

[0069] The present invention provides a low-height dual-coil snap-fit ​​electromagnetic relay. Since the magnetic circuit components, moving spring armature components, and stationary springs on both sides are the same, no additional molds need to be developed, thereby reducing costs.

[0070] Example 2

[0071] See Figure 15-18 As shown, the low-height dual-coil snap-fit ​​electromagnetic relay of the present invention differs from Embodiment 1 in that the moving spring armature component 3 has only one moving contact portion 311, the moving spring armature component 4 has only one moving contact portion 411, the stationary spring 51 has only one stationary contact portion 511, and the stationary spring 52 has only one stationary contact portion 521; the moving contact portion 311 of the moving spring armature component 3 corresponds to and cooperates with the stationary contact portion 511 of the stationary spring 51, the moving contact portion 411 of the moving spring armature component 4 corresponds to and cooperates with the stationary contact portion 521 of the stationary spring 52, the moving spring of the moving spring armature component 3 is connected to the stationary spring 52 through a soft copper wire 91, and the moving spring of the moving spring armature component 4 is connected to the stationary spring 51 through a soft copper wire 92.

[0072] Example 3

[0073] See Figure 19-20 As shown, the low-height dual-coil snap-fit ​​electromagnetic relay of the present invention differs from Embodiment 1 in that the moving spring armature component 3 has only one moving contact portion 311, the moving spring armature component 4 has only one moving contact portion 411, and the stationary spring 52 has two stationary contacts 521 and 522; the lower end of the moving contact portion 311 of the moving spring armature component 3 corresponds to and cooperates with the stationary contact portion 521 of the stationary spring 52, the lower end of the moving contact portion 411 of the moving spring armature component 4 corresponds to and cooperates with the stationary contact portion 522 of the stationary spring 52, and the upper end of the stationary spring 51 has an extension portion 516, which is connected to the upper end of the moving contact portion 311 of the moving spring armature component 3 and the upper end of the moving contact portion 411 of the moving spring armature component 4 through a flexible connecting wire 9.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A low-height dual-coil snap-fit ​​electromagnetic relay, comprising a base, a housing, two magnetic circuit sections, and two moving spring armature components; the magnetic circuit sections are mounted on the base, with the axis of the coils in the magnetic circuit sections arranged vertically; the two moving spring armature components respectively cooperate with the two magnetic circuit sections; the housing is cover-shaped, with its opening located on the side; characterized in that: The base, which is equipped with the magnetic circuit part and the moving spring armature component, is housed in the housing in a side-folding shape, so that the installation direction of the relay is perpendicular to the plane where the two sets of coil axes are located, thereby reducing the height dimension of the relay in the installation direction. The two moving spring armature components are each provided with two moving contacts connected in a bridge manner, and also include two stationary springs, each of which is provided with two stationary contacts. The two moving contacts of one of the moving spring armature components respectively mate with one stationary contact of one stationary spring and one stationary contact of the other stationary spring; similarly, the two moving contacts of the other moving spring armature component respectively mate with the other stationary contacts of one stationary spring and another stationary contact of the other stationary spring, thereby forming a two-way parallel contact circuit; or Each of the two moving spring armature components has only one moving contact portion, and each of the two stationary springs has only one stationary contact portion. The moving contact portion of one of the moving spring armature components is engaged with the stationary contact portion of one of the stationary springs, and the moving contact portion of the other moving spring armature component is engaged with the stationary contact portion of the other stationary spring. The moving contact portion of one of the moving spring armature components is connected to the other stationary spring via a flexible connecting wire, and the moving contact portion of the other moving spring armature component is connected to the one of the stationary springs via a flexible connecting wire.

2. The low-height dual-coil snap-action electromagnetic relay according to claim 1, characterized in that: Furthermore, it also includes a stationary spring portion; the stationary spring portion is mounted on the base and the lead-out portion of the stationary spring portion extends from the side of the relay; the stationary spring portion includes two stationary spring plates for realizing the inflow and outflow of current; the two stationary spring plates respectively cooperate with two moving spring armature components, so that the installed relay, in the height direction corresponding to the coil, has no cooperating part between the moving spring armature component and the stationary spring plate and the yoke, thereby reducing the height of the relay.

3. The low-height dual-coil snap-fit ​​electromagnetic relay according to claim 2, characterized in that: The mating part between the moving spring armature component and the stationary spring includes a stationary contact portion provided on the two stationary springs and a moving contact portion provided on the two moving spring armature components, forming a two-way contact parallel circuit between the two stationary springs.

4. The low-height dual-coil snap-action electromagnetic relay according to claim 2, characterized in that: The movable spring armature component includes an armature and a movable spring; one end of the movable spring is fixed to the armature; the magnetic circuit part includes a coil, a yoke, and an iron core; the coil includes a coil frame and enameled wire wound on the winding shaft of the coil frame; When the base and its magnetic circuit components, moving spring armature components, and stationary spring components mounted on the base are not tilted; the coil frame is vertically distributed; the iron core is inserted into the iron core hole of the coil frame; the yoke is L-shaped, with the horizontal side of the L-shape of the yoke fixed to the bottom end of the iron core, and the vertical side of the L-shape of the yoke adapted to the side of the enameled wire; the armature is adapted to the knife edge at the upper end of the vertical side of the vertical side of the yoke; one end of the moving spring extends from the fixed point of the armature and is provided with a return spring end, and the other end of the return spring is fixed to the vertical side of the L-shape of the yoke.

5. The low-height dual-coil snap-action electromagnetic relay according to claim 4, characterized in that: The other end of the moving spring is connected to a moving contact bridge or a soft copper wire; the moving contact part is a moving contact point, and each end of the moving contact bridge or soft copper wire is connected to a moving contact point; the static contact parts of the two stationary springs are stationary contacts, and the stationary contacts are fixed at the upper end of the corresponding stationary springs; the moving contact point is fixed at the lower end of the corresponding moving contact bridge or soft copper wire.

6. The low-height dual-coil snap-fit ​​electromagnetic relay according to claim 5, characterized in that: The moving spring is made of stainless steel and is I-shaped. The two horizontal segments of the I-shape are connected to the armature and the moving contact bridge, respectively. The vertical segment of the I-shape swings elastically to drive the moving contact bridge to move.

7. The low-height dual-coil snap-action electromagnetic relay according to claim 5, characterized in that: The housing has mounting portions on its two opposite side walls; when the base and its magnetic circuit portion, moving spring armature component and stationary spring portion mounted on the base are not tilted, the coil frames of the two magnetic circuit portions are distributed on both sides of the length of the relay; the two stationary springs are distributed on both sides of the width of the relay, and the stationary spring portion with the stationary contact portion is folded toward the middle of the length of the relay.

8. The low-height dual-coil snap-action electromagnetic relay according to claim 7, characterized in that: The two stationary springs are distributed on both sides of the width of the relay; the stationary contact portions of the two stationary springs are stationary contacts, and the two stationary contacts of each stationary spring are distributed along the length of the relay; the stationary contacts of the two stationary springs are aligned along the length of the relay, wherein the two stationary springs have a sheet-like structure and are distributed along the length of the relay; the upper end of the stationary spring is provided with a bent portion for fixing the stationary contact; the lower part of the stationary spring is provided with a lead-out foot; the lead-out feet of the two stationary springs are staggered along the length of the relay.

9. The low-height dual-coil snap-fit ​​electromagnetic relay according to claim 8, characterized in that: The two stationary reeds are arranged in a rotationally symmetrical manner.

10. The low-height dual-coil snap-fit ​​electromagnetic relay according to claim 9, characterized in that: The relay also includes a PCB board; the coil frames of the two magnetic circuit parts are respectively fixed with coil terminals; the coil terminals of the two magnetic circuit parts are respectively connected to the PCB board and are electrically connected in parallel.

11. The low-height dual-coil snap-action electromagnetic relay according to claim 10, characterized in that: The PCB board contains a control module; the control module outputs electrical signals to the two coils respectively, such that when the moving contact and the stationary contact are closed, one coil is powered on first, and the other coil is powered on after a preset time; when the moving contact and the stationary contact are open, the other coil is powered off first, and the first coil is powered off after a preset time; and / or, the two stationary springs are respectively provided with sampling protrusions, and the sampling protrusions of the two stationary springs are respectively inserted into the PCB board.

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