A low-height snap-action electromagnetic relay

Abstract

This invention discloses a low-height snap-fit ​​electromagnetic relay, comprising a base, a housing, a magnetic circuit portion, and a moving spring armature portion. The magnetic circuit portion is mounted on top of the base portion, with the axis of the coil assembly in the magnetic circuit portion arranged laterally. The armature in the moving spring armature portion engages with the magnetic circuit portion at one end of the coil assembly. The housing is cover-shaped with its opening on the side. The base, which houses the magnetic circuit portion and the moving spring armature portion, is tilted and housed within the housing, with the housing mounted vertically. This structure ensures that the height of the relay after installation is reduced to only the wall thickness of the coil assembly and the housing in the height direction corresponding to the coil assembly.

Description

Technical Field

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

[0002] Electromagnetic relays play a crucial role in circuits, performing functions such as automatic adjustment, safety protection, and circuit switching. Therefore, good load switching performance is essential. Due to space constraints, it's necessary to minimize the relay's size, particularly its height, while maintaining certain performance specifications. However, common high-current relays suffer from the following problems: 1. Compressing height leads to reduced component dimensions, resulting in decreased relay performance, increased manufacturing difficulty, and poor assembly processes. 2. The coil is typically designed with a square structure, which has lower utilization than a round coil; it also requires more enameled wire to output the same electromagnetic force. 3. The relay's height is occupied by numerous components, such as the housing, the safety clearance between the housing and armature hook, the armature hook, the yoke, the safety clearance between the yoke and the enameled wire, the enameled wire, the safety clearance between the enameled wire and the base, the base, the thickness of the stationary spring, and the cover plate. Too many components in the height direction make it difficult to reduce the height. 4. Compressing height leads to reduced component dimensions and safety clearances in the height direction, resulting in poor manufacturing processes and assembly. For example, the outer shell wall is locally thin, resulting in poor injection molding processability; the gap between the yoke and the enameled wire is small, making it difficult to rivet the moving spring to the yoke. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a low-height snap-fit ​​electromagnetic relay. By improving the structure, the installed relay has only the wall thickness of the coil assembly and the housing in the height direction corresponding to the coil assembly, thereby reducing the height of the relay.

[0004] The technical solution adopted by this invention to solve its technical problem is: a low-height snap-fit ​​electromagnetic relay, including a base, a housing, a magnetic circuit part, and a moving spring armature part; the magnetic circuit part is mounted on the top of the base part, and the axis of the coil assembly in the magnetic circuit part is arranged laterally; the armature in the moving spring armature part cooperates with the magnetic circuit part at one end of the coil assembly; the housing is cover-shaped, and its opening is located on the side; the base, which is equipped with the magnetic circuit part and the moving spring armature part, is tilted and housed in the housing, and the installation direction of the housing is vertical, so that the height of the relay after installation is only the wall thickness of the coil assembly and the housing in the height direction corresponding to the coil assembly, thereby reducing the height of the relay.

[0005] Furthermore, it also includes a stationary spring portion; the magnetic circuit portion further includes an iron core and a yoke, the iron core is installed in the coil assembly, the armature is fitted to one end of the iron core, the yoke is L-shaped, one side of the L-shape is connected to the other end of the iron core, when the base equipped with the magnetic circuit portion and the moving spring armature portion is not tilted, the other side of the L-shape fits above the coil assembly; the stationary spring portion is installed in the base and the stationary contact of the stationary spring portion corresponds to and fits with the moving contact in the moving spring armature portion, when the base equipped with the magnetic circuit portion and the moving spring armature portion is not tilted, the lead-out portion of the stationary spring portion extends downward out of the base.

[0006] Furthermore, the stationary spring portion includes a first stationary spring and a second stationary spring for realizing the inflow and outflow of current; both the first and second stationary springs are plate-type structures; the lead-out portions of the first and second stationary springs extend from the same side of the relay.

[0007] Furthermore, vertically mounted 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 first stationary spring and the second stationary spring are completely below the coil assembly.

[0008] Furthermore, the first stationary spring and the second stationary spring each include a stationary contact portion, an insertion portion, and a lead-out portion; the insertion portion is assembled in the base, the stationary contact portion is located at one end of the insertion portion and extends upward, the lead-out portion is located at the other end of the insertion portion and extends downward, and the insertion portion has a bending structure such that the plate surface of the lead-out portion is perpendicular to the plate surface of the stationary contact portion.

[0009] Furthermore, the static contact portions of the first and second stationary springs are arranged side by side, and the lead-out portions of the first and second stationary springs are also arranged side by side.

[0010] Furthermore, the moving spring armature portion includes an armature and a moving spring portion that operate in a snap-fit ​​manner; the stationary contact portion of the first stationary spring and the stationary contact portion of the second stationary spring are respectively provided with upper and lower stationary contact portions; the upper part of the moving spring portion is connected to the armature; the moving spring portion has two sets of moving contact portions distributed in an upper and lower manner, and respectively cooperate with the upper stationary contact portions of the first stationary spring and the second stationary spring and the lower stationary contact portions of the first stationary spring and the second stationary spring to form a two-way parallel contact structure.

[0011] Furthermore, when the armature moves, the lower moving contact portion of the moving spring portion contacts the lower stationary contact portion of the first stationary spring and the second stationary spring first, relative to the upper moving contact portion of the moving spring portion contacting the upper stationary contact portion of the first stationary spring and the second stationary spring.

[0012] Furthermore, the static contact portion is a static contact point, which is fixed on the first static spring and the second static spring. The moving spring is made of stainless steel. The moving spring portion is provided with two moving contact bridges, which are distributed vertically. The moving contact portion is a moving contact point, and the two sets of moving contacts are respectively fixed at both ends of the upper and lower moving contact bridges. The moving spring portion includes one middle spring and two side springs. The middle part of one of the upper and lower moving contact bridges is fixed to the end of the middle spring, and the two ends of the other upper and lower moving contact bridge are fixed to the ends of the two side springs.

[0013] Furthermore, the downward extension length of the tail end of the middle spring is greater than the downward extension length of the tail end of the side spring; the two ends of the upper movable contact bridge are fixed to the ends of the two side springs; and the lower movable contact bridge is fixed to the end of the middle spring.

[0014] Furthermore, the end of the middle spring is provided with a widened portion extending to both sides, and the two ends of the lower movable contact bridge are respectively connected to the widened portion of the middle spring, and / or, the end of the side spring is provided with a widened portion extending inward to one side, and the two ends of the upper movable contact bridge are respectively connected to the widened portions of the two side springs.

[0015] Furthermore, the upper parts of the central spring and the two side springs are connected as one unit.

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

[0017] 1. Because the outer casing is hood-shaped with its opening on the side, the base, which houses the magnetic circuit and moving spring armature, is tilted and housed within the casing, ensuring the casing is installed vertically. This structure of the present invention ensures that the installed relay, in the height direction corresponding to the coil assembly, consists only of the wall thickness of the coil assembly and the outer casing, thereby reducing the relay's height.

[0018] 2. Because the static spring section includes a first static spring and a second static spring for realizing current inflow and outflow; both the first and second static springs are sheet-type structures. This structure of the present invention makes the current-carrying path of the two load leads sufficiently wide and without bottleneck areas, resulting in strong current-carrying capacity.

[0019] 3. Due to the armature's operation, the lower moving contact of the moving spring portion contacts the lower stationary contact of the first and second stationary springs before the upper moving contact of the moving spring portion contacts the upper stationary contact of the first and second stationary springs. In this structure, during armature operation, the lower stationary contact of the first and second stationary springs preferentially contacts the corresponding moving contact, at which point the circuit is open. As the armature continues to rotate, the upper stationary contact of the first and second stationary springs contacts the corresponding moving contact bridge. Since the circuit is already open, there is no pressure difference between the upper stationary contact of the first and second stationary springs and the moving contact bridge, so no arcing occurs upon contact. When the armature resets, the upper stationary contact of the first and second stationary springs and the moving contact bridge disconnect preferentially due to their relatively small stroke. At this time, the circuit remains open, there is no pressure difference, so no arcing occurs upon disconnection. As the armature continues to rotate, the lower stationary contact parts of the first and second stationary springs break off from their corresponding moving contact parts, initiating an arc and disconnecting the load.

[0020] 4. Because the moving spring portion incorporates two moving contact bridges arranged vertically, with each bridge serving as a moving contact point, and the two sets of moving contacts fixed to the ends of the upper and lower moving contact bridges respectively; the moving spring portion includes one central spring and two side springs; the middle of one of the upper and lower moving contact bridges is fixed to the end of the central spring, and the two ends of the other upper and lower moving contact bridge are fixed to the ends of the two side springs. The end of the central spring has a widened portion extending to both sides, and the two ends of the lower moving contact bridge are respectively connected to the widened portion of the central spring; the ends of the side springs each have a widened portion extending inwards, and the two ends of the upper moving contact bridge are respectively connected to the widened portions of the two side springs. This structure allows for relatively free and independent movement between the two sets of moving contacts, thereby achieving two parallel current paths at the contact points while preventing mutual interference between the two moving contacts during operation, thus enhancing the reliability of the relay.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the low-height snap-fit ​​electromagnetic relay of the present invention is not limited to the embodiments. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram (front view) of an embodiment of the present invention;

[0023] Figure 2 This is a three-dimensional structural schematic diagram (reverse side) of an embodiment of the present invention;

[0024] Figure 3 This is an exploded view of an embodiment of the present invention (lead-out portion facing down);

[0025] Figure 4 This is a rear view of an embodiment of the present invention;

[0026] Figure 5 It is along Figure 4 AA section view in the middle;

[0027] Figure 6 It is along Figure 4 BB section view in the middle;

[0028] Figure 7 This is a top view of an embodiment of the present invention;

[0029] Figure 8 It is along Figure 7 CC section view in the middle;

[0030] Figure 9 This is a three-dimensional structural diagram of an embodiment of the present invention with the outer shell removed (lead-out portion facing down);

[0031] Figure 10 This is a three-dimensional structural diagram of an embodiment of the present invention with the outer shell and base removed (lead-out portion facing down);

[0032] Figure 11 This is a front view of an embodiment of the present invention with the outer casing and base removed (lead-out portion facing down);

[0033] Figure 12 This is a three-dimensional structural schematic diagram of the stationary spring portion according to an embodiment of the present invention;

[0034] Figure 13 This is a schematic diagram illustrating the fit between the base and the stationary spring portion in an embodiment of the present invention;

[0035] Figure 14 This is a schematic diagram of the fit between the base and the stationary spring portion in an embodiment of the present invention (flipped at an angle);

[0036] Figure 15 This is an exploded view of the mating point between the base and the stationary spring in an embodiment of the present invention;

[0037] Figure 16 This is a three-dimensional structural schematic diagram of a partial embodiment of the present invention (lead-out portion facing downwards);

[0038] Figure 17 This is a side view of a partial embodiment of the present invention (lead-out portion facing downwards);

[0039] Figure 18 This is a front view of a partial embodiment of the present invention (lead-out portion facing downwards);

[0040] Figure 19 This is a three-dimensional structural diagram of a portion of an embodiment of the present invention with the movable spring armature portion removed (lead-out portion facing down);

[0041] Figure 20 This is a front view of the moving spring armature portion of an embodiment of the present invention;

[0042] Figure 21 It is along Figure 20 DD section view in the middle;

[0043] Figure 22 This is a three-dimensional structural schematic diagram (back side) of the moving spring armature portion according to an embodiment of the present invention. Detailed Implementation

[0044] Example

[0045] See Figures 1 to 22 As shown, a low-height snap-fit ​​electromagnetic relay of the present invention includes a base 1, a housing 2, a magnetic circuit portion, and a moving spring armature portion. The magnetic circuit portion is mounted on the top of the base 1 portion, and the axis of the coil assembly 5 in the magnetic circuit portion is arranged laterally. The armature 6 in the moving spring armature portion cooperates with the magnetic circuit portion at one end of the coil assembly 5. The housing 2 is cover-shaped, and its opening is located on the side. The base 1, which is equipped with the magnetic circuit portion and the moving spring armature portion, is tilted and housed in the housing 2, and the installation direction of the housing 2 is vertical, so that the height of the relay after installation is only the wall thickness of the coil assembly 5 and the housing 2 in the height direction corresponding to the coil assembly, thereby reducing the height of the relay.

[0046] In this embodiment, a stationary spring portion is also included; the magnetic circuit portion further includes an iron core 3 and a yoke 4. The iron core 3 is installed in the coil assembly 5, and the armature 6 is fitted to one end of the iron core 3. The yoke 4 is L-shaped, with one side of the L-shape connected to the other end of the iron core 3. When the base 1, which is equipped with the magnetic circuit portion and the moving spring armature portion, is not tilted, the other side of the L-shape fits above the coil assembly 5. The stationary spring portion is installed in the base 1, and the stationary contact of the stationary spring portion corresponds to and fits with the moving contact in the moving spring armature portion. When the base 1, which is equipped with the magnetic circuit portion and the moving spring armature portion, is not tilted, the lead-out portions 83 and 93 of the stationary spring portion extend downwards from the base 1. The coil assembly 5 includes an enameled wire 51 and a coil frame 52.

[0047] In this embodiment, the stationary spring portion includes a first stationary spring 8 and a second stationary spring 9 for realizing the inflow and outflow of current; both the first stationary spring 8 and the second stationary spring 9 are plate-type structures; the lead-out portions 83 and 93 of the first stationary spring 8 and the second stationary spring 9 extend from the same side of the relay.

[0048] In this embodiment, mounting portions 21 and 22 for vertical installation are respectively provided in the two opposite side walls of the outer casing 2; when the base 1 and its magnetic circuit portion, moving spring armature portion and stationary spring portion assembled on the base 1 are not tilted; the first stationary spring 8 and the second stationary spring 9 are completely below the coil assembly 5.

[0049] In this embodiment, the first stationary spring 8 includes a stationary contact portion 81, an insertion portion 82, and a lead-out portion 83; the second stationary spring 9 includes a stationary contact portion 91, an insertion portion 92, and a lead-out portion 93. The insertion portions 82 and 92 of the first stationary spring 8 and the second stationary spring 9 are respectively assembled in the base 1. The stationary contact portions 81 and 91 of the first stationary spring 8 and the second stationary spring 9 are respectively located at one end of the corresponding insertion portions 82 and 92 and extend upward. The lead-out portions 83 and 93 of the first stationary spring 8 and the second stationary spring 9 are respectively located at the other end of the corresponding insertion portions 82 and 92 and extend downward. The insertion portions 82 and 92 are respectively provided with a bending structure, so that the plate surface of the corresponding lead-out portions 83 and 93 is perpendicular to the plate surface of the corresponding stationary contact portions 81 and 91.

[0050] In this embodiment, the static contact portion 81 of the first static spring 8 and the static contact portion 91 of the second static spring 9 are arranged side by side, and the lead-out portion 83 of the first static spring 8 and the lead-out portion 93 of the second static spring 9 are arranged side by side.

[0051] In this embodiment, the moving spring armature part includes an armature 6 that operates by snapping together and a moving spring part 7; the stationary contact part 81 of the first stationary spring 8 is provided with an upper stationary contact part 811 and a lower stationary contact part 812, and the stationary contact part 91 of the second stationary spring 9 is provided with an upper stationary contact part 911 and a lower stationary contact part 912; the upper part of the moving spring part 7 is connected to the armature 6; the moving spring part 7 has moving contacts 711 and 712 distributed upwards, which correspond to and cooperate with the upper stationary contact part 811 of the first stationary spring and the upper stationary contact part 911 of the second stationary spring; the moving spring part has moving contacts 721 and 722 distributed downwards, which correspond to and cooperate with the lower stationary contact part 812 of the first stationary spring 8 and the lower stationary contact part 912 of the second stationary spring 9, thereby forming a two-way parallel contact structure.

[0052] In this embodiment, when the armature 6 is actuated, the lower moving contact portions 721 and 722 of the moving spring portion 7 and the lower stationary contact portions 812 and 912 of the first stationary spring 8 and the second stationary spring 9 make contact first with the upper moving contact portions 711 and 712 of the moving spring portion 7 and the upper stationary contact portions 811 and 911 of the first stationary spring 8 and the second stationary spring 9. Specifically, the lower stationary contact portions 812 and 912 of the first stationary spring 8 and the second stationary spring 9 are provided with thickened portions, so that when the armature 6 is actuated, the lower moving contact portions 721 and 722 of the moving spring portion 7 and the lower stationary contact portions 812 and 912 of the first stationary spring 8 and the second stationary spring 9 make contact first with the upper moving contact portions 711 and 712 of the moving spring portion 7 and the upper stationary contact portions 811 and 911 of the first stationary spring 8 and the second stationary spring 9.

[0053] In this embodiment, the stationary contact portions 811, 812, 911, and 912 are stationary contacts, which are fixed on the first stationary spring 8 and the second stationary spring 9.

[0054] In this embodiment, the movable spring portion is provided with two movable contact bridges 713 and 723, which are arranged vertically. The movable contact portions 711, 712, 721, and 722 are movable contacts, and the two sets of movable contacts are respectively fixed to the two ends of the upper and lower movable contact bridges 713 and 723. The movable spring portion 7 includes a middle spring 72 and two side springs 71; the middle part of the lower movable contact bridge 723 is fixed to the end of the middle spring 72, and the two ends of the upper movable contact bridge 713 are respectively fixed to the ends of the two side springs 71.

[0055] In this embodiment, the downward extension length of the tail end of the middle spring 72 is greater than the downward extension length of the tail end of the side spring 71, and the two ends of the upper movable contact bridge 713 are fixed to the ends of the two side springs 71; the lower movable contact bridge 723 is fixed to the end of the middle spring 72.

[0056] In this embodiment, the end of the middle spring 72 is provided with a widened portion extending to both sides, the two ends of the lower movable contact bridge 723 are respectively connected to the widened portion of the middle spring 72, the end of the side spring 71 is provided with a widened portion extending inward to one side, and the two ends of the upper movable contact bridge 713 are respectively connected to the widened portions of the two side springs 71.

[0057] In this embodiment, the upper parts of the middle spring 72 and the two side springs 71 are connected as one unit.

[0058] In this embodiment, the upper part of the middle spring 72 and the two side springs 71 are integrally connected to the reset spring 73; the other end of the reset spring 73 is riveted to the yoke 4 for fixation; thereby making the upper part of the armature 6 fit at the blade of the yoke 4.

[0059] This invention discloses a low-height snap-fit ​​electromagnetic relay, wherein the housing 2 is shield-shaped with an opening on the side; the base 1, which assembles the magnetic circuit part and the moving spring armature part, is housed in the housing 2 in a side-folded manner, and the installation direction of the housing 2 is vertical. This structure of the invention ensures that, in the height direction corresponding to the coil assembly, the installed relay consists only of the wall thickness of the coil assembly and the housing, thereby reducing the height of the relay.

[0060] This invention discloses a low-height snap-action electromagnetic relay, which employs a stationary spring portion comprising a first stationary spring 8 and a second stationary spring 9 for realizing current inflow and outflow; both the first stationary spring 8 and the second stationary spring 9 are plate-type structures. This structure of the invention provides a sufficiently wide current-carrying path for the two load leads, without bottleneck areas, resulting in strong current-carrying capacity.

[0061] This invention discloses a low-height snap-fit ​​electromagnetic relay in which, when the armature actuates, the lower moving contact of the moving spring portion 7 contacts the lower stationary contact of the first stationary spring 8 and the second stationary spring 9 before the upper moving contact of the moving spring portion 7 contacts the upper stationary contact of the first stationary spring 8 and the second stationary spring 9. In this structure, when the armature actuates, the lower stationary contact of the first and second stationary springs preferentially contacts the corresponding moving contact, at which point the circuit is connected. As the armature continues to rotate, the upper stationary contact of the first and second stationary springs contacts the corresponding moving contact bridge. Since the circuit is already connected, there is no pressure difference between the upper stationary contact of the first and second stationary springs and the moving contact bridge, thus preventing arcing upon contact. When the armature resets, the upper stationary contact of the first and second stationary springs and the moving contact bridge disconnect preferentially due to their relatively small stroke. At this time, the circuit remains connected, there is no pressure difference, and therefore no arcing occurs upon disconnection. As the armature continues to rotate, the lower stationary contact parts of the first and second stationary springs break off from their corresponding moving contact parts, initiating an arc and disconnecting the load.

[0062] This invention discloses a low-height snap-action electromagnetic relay. The moving spring portion 7 comprises two moving contact bridges 713 and 723, arranged vertically. The moving contact portion is a moving contact point, and the two sets of moving contacts are respectively fixed to the two ends of the upper and lower moving contact bridges 713 and 723. The moving spring portion includes a central spring 72 and two side springs 71. The middle portion of one of the upper and lower moving contact bridges is fixed to the end of the central spring 72, and the two ends of the other upper and lower moving contact bridge are fixed to the ends of the two side springs 71. The end of the central spring 72 has a widened portion extending to both sides, and the two ends of the lower moving contact bridge 723 are respectively connected to the widened portion of the central spring 72. The ends of the side springs 71 each have a widened portion extending inwards, and the two ends of the upper moving contact bridge 713 are respectively connected to the widened portions of the two side springs 71. This structure of the invention allows for relatively free and independent movement between the two sets of moving contacts. This enables the inflow and outflow currents to form two parallel paths at the contact points while preventing mutual interference between the two moving contacts during operation, thus enhancing the reliability of the relay. One of the two moving contact bridges is responsible for connecting and disconnecting the load and also carries current, while the other moving contact bridge is only responsible for carrying current. This allows the moving and stationary contacts responsible for carrying current to be made of low-resistance materials, while the moving and stationary contacts responsible for connecting and disconnecting the load are made of ablation-resistant materials. This reduces contact resistance to lower heat generation while maintaining good load switching capability.

[0063] 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 snap-action electromagnetic relay, comprising a base, a housing, a magnetic circuit portion, a stationary spring portion, and a moving spring armature portion; the magnetic circuit portion includes an iron core mounted on the top of the base, and the axis of the coil assembly in the magnetic circuit portion is arranged laterally; the iron core is mounted in the coil assembly, and the armature in the moving spring armature portion engages with the magnetic circuit portion at one end of the iron core; characterized in that: The outer casing is dome-shaped with its opening on the side. The base, which is equipped with the magnetic circuit part and the moving spring armature part, is tilted and housed inside the outer casing, so that the installation direction of the outer casing is vertical. This makes the installed relay only have the wall thickness of the coil assembly and the outer casing in the height direction corresponding to the coil assembly, thereby reducing the height of the relay. The stationary spring section includes a first stationary spring sheet and a second stationary spring sheet, which are sheet-shaped structures with no bottleneck area in width. The first stationary spring sheet and the second stationary spring sheet respectively include a stationary contact portion, an insertion portion and a lead-out portion. The insertion part is assembled in the base. The static contact part is located at one end of the insertion part and extends upward. The lead-out part is located at the other end of the insertion part and extends downward. The insertion part has a bending structure, so that the plate surface of the lead-out part is perpendicular to the plate surface of the static contact part. When the base is not tilted, the static spring part is located below the coil assembly.

2. The low-height snap-action electromagnetic relay according to claim 1, characterized in that: The magnetic circuit section also includes a yoke, which is L-shaped. One side of the L-shape is connected to the other end of the iron core. When the base, which is equipped with the magnetic circuit section and the moving spring armature section, is not tilted, the other side of the L-shape fits above the coil assembly. The stationary spring section is installed in the base and the stationary contact of the stationary spring section corresponds to and engages with the moving contact in the moving spring armature section. When the base, which is equipped with the magnetic circuit section and the moving spring armature section, is not tilted, the lead-out portion of the stationary spring section extends downward out of the base.

3. The low-height snap-action electromagnetic relay according to claim 2, characterized in that: The first and second stationary springs are used to realize the inflow and outflow of current; both the first and second stationary springs are plate-type structures; the lead-out portions of the first and second stationary springs extend from the same side of the relay.

4. The low-height snap-action electromagnetic relay according to claim 3, characterized in that: The outer casing has mounting parts on its two opposite side walls that can be installed vertically.

5. The low-height snap-action electromagnetic relay according to claim 4, characterized in that: The static contact portions of the first and second stationary springs are arranged side by side, and the lead-out portions of the first and second stationary springs are also arranged side by side.

6. The low-height snap-action electromagnetic relay according to claim 5, characterized in that: The moving spring armature part includes an armature that operates by snapping together and a moving spring part; the stationary contact part of the first stationary spring and the stationary contact part of the second stationary spring are respectively provided with an upper stationary contact part and a lower stationary contact part; the upper part of the moving spring part is connected to the armature; the moving spring part has an upper moving contact part and a lower moving contact part distributed on the upper and lower sides, and respectively cooperates with the upper stationary contact part of the first stationary spring and the lower stationary contact part of the second stationary spring to form a two-way parallel contact structure.

7. The low-height snap-action electromagnetic relay according to claim 6, characterized in that: When the armature moves, the lower moving contact part of the moving spring part contacts the lower stationary contact part of the first stationary spring and the second stationary spring first, relative to the upper moving contact part of the moving spring part contacting the upper stationary contact part of the first stationary spring and the second stationary spring.

8. The low-height snap-action electromagnetic relay according to claim 7, characterized in that: The upper and lower stationary contact portions are stationary contacts, which are fixed to the first and second stationary springs. The moving spring portion is made of stainless steel and has two moving contact bridges arranged vertically. The upper and lower moving contact portions are moving contacts, and the two sets of moving contacts are fixed to the two ends of the two moving contact bridges respectively. The moving spring portion includes one middle spring and two side springs. The middle part of one of the two moving contact bridges is fixed to the end of the middle spring, and the two ends of the other moving contact bridge are fixed to the ends of the two side springs.

9. The low-height snap-action electromagnetic relay according to claim 8, characterized in that: The downward extension length of the tail end of the middle spring is greater than the downward extension length of the tail end of the side spring. The two moving contact bridges are the upper moving contact bridge and the lower moving contact bridge, respectively. The two ends of the upper moving contact bridge are fixed to the ends of the two side springs; the lower moving contact bridge is fixed to the end of the middle spring.

10. The low-height snap-action electromagnetic relay according to claim 9, characterized in that: The end of the middle spring is provided with a widened portion extending to both sides, and the two ends of the lower movable contact bridge are respectively connected to the widened portion of the middle spring, and / or the end of the side spring is provided with a widened portion extending inward to one side, and the two ends of the upper movable contact bridge are respectively connected to the widened portions of the two side springs.

11. The low-height snap-action electromagnetic relay according to claim 10, characterized in that: The upper parts of the central spring and the two side springs are connected as one piece.

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