Relay reed and shell matching structure and clapper type electromagnetic relay

Abstract

The utility model relates to the technical field of electromagnetic relays, and particularly discloses a relay reed and shell matching structure and a clapper type electromagnetic relay. The matching structure comprises a reed and a shell which are assembled on the base; the arrangement position of the reeds on the base is close to the corresponding inner wall of the shell; when the shell is assembled on the base, the sleeving direction is along with the extension direction of the pin part of the reed assembled on the base; the pin part of the reed protrudes at the adjacent reed body part and is close to the corresponding inner wall of the sleeved shell; corresponding to the sleeving direction of the shell, the reed is provided with a guide structure which is used for guiding the shell in the sleeving process so as to prevent the shell from abutting against the top end of the pin part. According to the utility model, on the basis of improving the performance of the reed, the guide structure on the reed is used for effectively dredging the shell in the sleeving process, so that the smooth sleeving operation of the shell is ensured, the extrusion influence of the shell on the reed arrangement structure in the sleeving process is reduced as much as possible, and / or the generation of sweeps is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic relay technology, specifically a relay spring and housing mating structure, and a snap-fit ​​electromagnetic relay including this mating structure. Background Technology

[0002] In the field of electromagnetic relay technology, the housing is typically a cavity structure with one open end, which serves as a mating base to isolate and protect the magnetic circuit and contact parts arranged on the base. The aforementioned mating structure between the housing and the base is such that the opening of the housing basically matches the contour of the base, and the housing is inserted from the top side of the magnetic circuit and contact parts arranged on the base to accommodate them, and is then fitted and sealed at the base.

[0003] Due to the unique arrangement of the contact and magnetic circuit parts of an electromagnetic relay on the base, a group of springs constituting the contact part are usually arranged near the corresponding inner wall of the outer casing. For example, the relationship between the moving spring and the outer casing of a snap-action electromagnetic relay (see Chinese patent document entitled "A Coil Frame for a Snap-action Relay and a Snap-action Relay", publication number CN 110444445 A, publication date November 12, 2019, etc.), and the relationship between the stationary spring and the outer casing of a push-rod electromagnetic relay (see Chinese patent document entitled "A Push-rod Relay with Anti-spring Release Rebound", publication number CN117133596 A, publication date November 28, 2023, or entitled "A Push-card and Moving Spring Cooperation Structure for a Horizontal Relay", publication number CN 115274363 A, publication date November 01, 2022, etc.). In the current optimized design of electromagnetic relays, in pursuit of the ultimate cost-effectiveness, the overall shape of the electromagnetic relay is usually not adjusted (or the main structure of the molding die is not changed). However, it is necessary to improve the current carrying capacity and heat dissipation performance of the reed, as well as the structural rigidity of the reed mounted on the base. This requires thickening the thinner reed at the pin portion (for example, the Chinese patent document entitled "A moving reed of a high-power electromagnetic relay and its manufacturing method", publication number CN104851748 A, publication date August 19, 2015, etc.). This thickening process usually occupies the arrangement space on the side of the reed near the outer shell. That is, the thickening process of the reed at the pin portion is formed by protruding towards the outer shell. In this way, the surface of the reed facing the outer shell will form a boss structure at the pin portion. Furthermore, since the space between the reed and the housing is already narrow, the presence of the aforementioned boss structure at the reed pin makes the reed and housing, once assembled on the base, tend to form a contact fit (i.e., the inner wall of the housing and the corresponding surface of the reed pin form a contact fit). Thus, the boss structure at the reed pin is very likely to interfere with the housing and become stuck during the assembly process of the housing onto the base. This not only affects the assembly efficiency of the electromagnetic relay but also has an adverse effect on the performance of the finished electromagnetic relay (including the housing squeezing and deforming the reed arrangement structure, and / or the reed scraping the housing and generating waste debris retained in the housing cavity). This is especially prominent in the fit between the moving reed and the housing of small snap-fit ​​electromagnetic relays (also known as "sugar cube" electromagnetic relays) with compact design and small size. Utility Model Content

[0004] The technical objective of this utility model is to address the specific needs of current optimized electromagnetic relay designs in pursuit of ultimate cost-effectiveness and the existing technical problems. It provides a spring-and-shell mating structure that achieves low temperature rise and high structural rigidity at the spring pin portion while effectively guiding the housing assembly process to prevent the housing from abutting and jamming at the protrusion of the spring pin portion during assembly. It also includes a snap-fit ​​electromagnetic relay containing this mating structure.

[0005] The technical objective of this utility model is achieved through the following technical solution: a relay spring and housing mating structure, comprising a spring and a housing assembled on a base;

[0006] The arrangement of the reeds on the base is close to the corresponding inner wall of the outer shell;

[0007] When the outer casing is assembled on the base, the assembly direction follows the extension direction of the pin portion of the spring sheet assembled on the base;

[0008] The lead portion of the reed protrudes from the adjacent reed body portion and is close to the corresponding inner wall of the housing to which it is fitted.

[0009] Corresponding to the assembly direction of the housing, the spring has a guide structure that guides the housing during the assembly process to prevent the housing from abutting the top of the pin portion.

[0010] The aforementioned technical measures address the specific need for optimal cost-effectiveness in current electromagnetic relay optimization designs. The lead portion of the reed adjacent to the housing is designed with a thickened structure close to the housing, effectively improving the reed's current-carrying capacity and structural rigidity, reducing temperature rise, and reliably enhancing the reed's performance to meet technical requirements without significantly altering the electromagnetic relay's external structure. Furthermore, considering the potential for positional interference between the protruding lead portion of the reed and the corresponding inner wall of the housing during assembly, a guiding structure on the reed effectively guides the housing during assembly, preventing the housing from abutting and jamming the lead portion of the reed at the protrusion. This ensures smooth housing assembly and minimizes the impact of the housing on the reed arrangement structure during assembly, and / or reduces waste generation.

[0011] As one of the preferred technical solutions, the guide structure is formed at the outer edge of the top of the pin portion, and is a curved / sloping surface structure at the outer edge of the top of the pin portion that conforms to the direction of the housing assembly. This technical measure addresses the special characteristics of the thickened design of the spring pin portion and its fit with the adjacent housing assembly. Through the guide structure at the outer edge of the top of the pin portion, the housing assembly fitted to the top of the pin portion is effectively guided, thus preventing abutment and jamming at the protrusion of the pin portion.

[0012] Furthermore, the pin portion has a multi-layered stacked structure, having a pin base portion extending from the spring body portion, and multiple stacked pieces stacked on the pin base portion near the side of the housing to be fitted.

[0013] The guide structure is a guide fold formed on the top of the stacked plate away from the pin base.

[0014] The thickened pin design of the above-mentioned technical measures can effectively increase the heat dissipation area of ​​the pins and reduce their temperature rise while meeting structural rigidity requirements. Based on this thickened design of the stacked structure, the guide fold at the top of the outermost stack (i.e., the stack away from the pin base) can form a chamfer protection on the outer edge of the top of the protruding structure of the pins, thereby eliminating sharp edges that meet the housing assembly, effectively guiding the housing during the assembly process, and minimizing the generation of scraping debris during the assembly process.

[0015] Furthermore, the pin portion has a three-layer stacked structure, having a pin base portion extending from the spring body portion, a left wing portion extending from the left side of the pin base portion in the horizontal direction and engaging with the pin base portion after stacking, and a right wing portion extending from the right side of the pin base portion in the horizontal direction and engaging with the pin base portion after stacking.

[0016] The left wing is overlapped with the pin base portion / the right wing on the surface facing the outer shell in a rightward folding-back overlapping structure in the transverse direction;

[0017] The right wing is overlapped in the transverse direction with a leftward folding structure on the surface of the pin base / the left wing facing the outer shell.

[0018] The above-mentioned technical measures are based on the pin base portion extending from the spring body portion, and integrally formed with wing portions extending from its left and right sides respectively. The wing portions on both sides are folded back at the corresponding surfaces to form a stacked pin portion. On the one hand, it can make the thickened pin portion easier to form and control the forming cost; on the other hand, it can effectively ensure the uniformity of its heat dissipation performance and avoid local overheating.

[0019] Furthermore, the spring body portion above the pin portion has a protruding guide protrusion that is adjacent to the inner wall of the housing to which it is fitted;

[0020] The guide protrusion has a curved / sloping surface structure that conforms to the direction of the outer casing assembly.

[0021] The aforementioned technical measures form a guide structure on the reed independent of the top of the pin. This guide structure cooperates with the guide structure at the top of the pin during the housing assembly process, so that the guide structure mates with the housing before the guide structure at the top of the pin, providing initial guidance for the housing during the assembly process. This ensures that the housing can mate with the guide structure at the top of the pin during the continuous assembly process, thus preventing it from tilting to the root of the top of the pin (i.e., the area where the pin is adjacent to the reed body). This reduces or even avoids positional interference between the housing and the area not covered by the guide structure at the top of the pin during the assembly process, which would affect the assembly operation.

[0022] Furthermore, the maximum protrusion height of the guide protrusion from the first side surface of the spring body is greater than or equal to the minimum distance between the guide surface of the outer edge guide structure at the top of the pin and the first side surface of the spring body, and less than the maximum distance between the guide surface of the outer edge guide structure at the top of the pin and the first side surface of the spring body.

[0023] The first side surface of the reed body is the surface on which the guide protrusion is provided.

[0024] The aforementioned technical measures connect the guide structure, independent of the pin tip, with the guide structure at the pin tip during the housing assembly process. This ensures that the housing guided by the guide protrusion accurately aligns with the guide structure at the pin tip during continuous assembly, preventing it from tilting to the root of the pin tip (i.e., the area where the pin tip is adjacent to the spring body). This avoids positional interference between the housing and areas not covered by the guide structure at the pin tip during assembly, thus preventing disruption to the assembly process. Therefore, the connection and cooperation between the guide protrusion and the guide structure at the pin tip provides a more stable and reliable guiding effect for housing assembly.

[0025] Furthermore, the guide protrusion is a stamped protrusion structure integrally formed on the reed body. This technical measure makes the guide protrusion easy to form on the reed, controls forming costs, and provides good stability. At the same time, the protrusion height can be adapted to design requirements, offering better flexibility compared to combined connection structures. Additionally, by forming the guide protrusion by stamping a protrusion structure integrally on the reed, the current-carrying area of ​​the reed remains intact, without affecting the reed's current-carrying capacity.

[0026] A snap-action electromagnetic relay includes a coil frame, a moving spring assembly mounted on the coil frame, and a housing.

[0027] The moving spring assembly and the housing have the aforementioned mating structure.

[0028] Furthermore, the coil frame has an I-shaped structure and has base side baffles and contact side baffles at both ends of the winding drum;

[0029] An L-shaped yoke is mounted on the side baffle of the base, and the blade of the yoke extends to the contact side baffle.

[0030] At the blade position of the yoke, an armature located outside the contact side baffle is assembled via the moving spring assembly;

[0031] The moving spring pin of the moving spring assembly is mounted on the base side baffle at the yoke.

[0032] The outer casing is mounted on the coil frame in the direction from the contact side baffle to the base side baffle.

[0033] The aforementioned technical measures address the unique characteristics of the molding structure of snap-fit ​​electromagnetic relays. By molding the moving spring assembly and the housing using this mating structure, the current-carrying capacity of the moving spring assembly is effectively improved, temperature rise is reduced, and the structural rigidity of the moving spring assembly mounted on the coil frame is increased, thus enhancing drop resistance, all without fundamentally altering the overall shape of the electromagnetic relay. Furthermore, considering the potential for positional interference between the protruding structure of the moving spring pin and the corresponding inner wall of the housing during assembly, effective guidance is provided during the assembly process to prevent the housing and the moving spring pin from abutting and jamming at the protrusion. This ensures smooth assembly of the snap-fit ​​electromagnetic relay housing and guarantees the molding quality of the relay.

[0034] As one of the preferred technical solutions, the moving spring assembly is laterally mounted on the coil frame in a manner corresponding to the assembly direction of the yoke on the side baffle of the base;

[0035] Correspondingly, the base side baffle of the yoke has a U-shaped open structure for the moving spring side mounting groove;

[0036] During the installation of the moving spring assembly on the coil frame, the moving spring pin is mounted on the base side baffle through the opening of the moving spring side mounting slot;

[0037] The inner wall of the outer casing has a raised rib that corresponds to the mounting groove on the side of the moving spring.

[0038] During the assembly of the outer casing, the adhesive-blocking rib is located near the moving spring assembly of the yoke;

[0039] Furthermore, the fitted housing allows the adhesive-blocking rib to engage with the moving spring side mounting groove to form a limiting assembly of the moving spring assembly on the base side baffle.

[0040] The aforementioned technical measures for the snap-fit ​​electromagnetic relay change the assembly direction of the moving spring assembly on the coil frame to adapt to the structural constraints at the contact side baffle or to the lateral assembly matching the yoke assembly. This differs from the traditional insertion from the contact section baffle to the base side baffle. Consequently, a moving spring side mounting groove adapted to the lateral assembly needs to be formed on the base side baffle of the coil frame to position the moving spring pin. Simultaneously, a glue-blocking rib adapted to the moving spring side mounting groove needs to be formed on the corresponding inner wall of the housing to abut and limit the moving spring pin in the moving spring side mounting groove and seal it. In other words, the glue-blocking rib of the housing, in conjunction with the moving spring side mounting groove of the base side baffle, achieves the technical effect of the pin insertion hole in the traditional insertion of the moving spring assembly.

[0041] Furthermore, on the surface of the moving spring side mounting groove that meets the moving spring pin, at least one glue flow groove corresponding to the thickness direction of the base side baffle is formed with a concave-convex structure. When the moving spring pin is assembled in the moving spring side mounting groove, the corresponding surface of the moving spring pin mates with the meeting surface of the moving spring side mounting groove.

[0042] And / or, the surface of the adhesive-blocking rib that meets the pin of the moving spring is formed with at least one adhesive flow groove corresponding to the assembly direction in a concave-convex structure. When the adhesive-blocking rib is assembled in the side mounting groove of the moving spring, the surface of the adhesive-blocking rib that meets the pin of the moving spring mates with the corresponding surface of the pin of the moving spring.

[0043] The above technical measures not only ensure that the outer shell and the base side baffle constrain and limit the side-mounted moving spring pin, but also form a glue flow groove for sealing at the constraint and limit point, so that the fit between the outer shell and the coil frame forms a stable and sealed assembly of the moving spring assembly.

[0044] Furthermore, the contact side baffle of the coil frame has a limiting stop that protrudes from both sides of the armature and / or the moving spring assembly in the lateral direction to constrain and limit the outward turning action.

[0045] The two sets of limiting buckles on the contact side baffle constitute the insertion channel for the lateral assembly of the moving spring assembly;

[0046] When the moving spring assembly is laterally assembled on the coil frame, the moving spring assembly and / or the armature pass through the mounting channel formed by the limiting stop on the contact side baffle.

[0047] The aforementioned technical measures, addressing the unique characteristics of snap-action relays, incorporate a limiting structure on the contact-side baffle of the coil frame that constrains and limits the outward movement of the assembled armature and moving spring. This limiting structure also constrains and limits the armature and moving spring on both sides of their lateral width, creating a three-dimensional constraint in both the outward and lateral directions, thus improving the armature's resistance to drop. However, the presence of this limiting structure creates a structural restriction on the outer side of the contact-side baffle that interferes with the lateral width of the armature and / or moving spring. Therefore, the assembly of the moving spring and the armature connected to it on the coil frame cannot be done using the traditional insertion method from the contact section baffle to the base side baffle. Instead, it must be replaced with a lateral assembly corresponding to the insertion channel formed by the limiting baffle, to accommodate the lateral assembly of the moving spring assembly on the coil frame.

[0048] Furthermore, the limiting buckle on the contact side baffle is formed at the corresponding corner of the end of the armature away from the yoke;

[0049] The limiting stop has a front stop post at the end of the armature, and a top side folded-back edge that folds back on the front stop post to the top side of the armature. The top side folded-back edge and the front stop post are engaged in an L-shaped structure.

[0050] The above-mentioned technical measures are aimed at the lateral assembly of the moving spring assembly on the coil frame. The limiting buckle that constitutes the lateral assembly insertion channel forms a constraint limit at the end of the armature near the contact mating area. In combination with the aforementioned constraint limit in the outward turning direction and the lateral width direction, a three-dimensional constraint limit is formed on the armature in the front-back direction (i.e., the direction corresponding to the yoke to the contact mating area), the up-down direction (i.e., the outward turning direction, corresponding to the direction of the base side baffle and the contact side baffle), and the left-right direction (i.e., the lateral width direction, corresponding to the lateral width of the armature and the moving spring, perpendicular to the front-back direction), which reliably prevents the armature from falling.

[0051] Furthermore, the limiting stop also has a side folded-back edge that folds back on the front stop post to the left / right side of the armature, and the side folded-back edge engages with the front stop post in an L-shaped structure. This limiting stop, while providing three-dimensional constraint and limiting of the armature, has a simple and clear structure, and is easy to form into a coil frame.

[0052] Furthermore, the side folded-back edge of the limiting stop is folded back downwards at the corresponding edge of the top folded-back edge. The side folded-back edge and the top folded-back edge are fitted in an L-shaped structure, and the bottom edge of the side folded-back edge is fitted with the contact side baffle at a distance. This technical measure achieves three-dimensional constraint and limiting of the armature while forming a process clearance notch (i.e., the spacing fit structure between the bottom edge of the side folded-back edge and the contact side baffle) on the left / right side of the limiting stop corresponding to the horizontal width direction of the armature, so as to ensure that the process testing (such as OT tracking test) of the entire electromagnetic relay can be easily and reliably achieved.

[0053] The beneficial technical effects of this utility model are as follows: The above-mentioned technical measures address the specific need for optimal cost-effectiveness in the optimized design of current electromagnetic relays, especially snap-action electromagnetic relays. By designing the lead portion of the spring adjacent to the outer shell with a thickened structure close to the shell, the current-carrying capacity and structural rigidity of the spring are effectively improved, and temperature rise is reduced. This reliably improves the performance of the spring to meet technical requirements without significantly altering the external structure of the electromagnetic relay. Furthermore, considering the potential positional interference between the protruding structure of the spring lead portion and the corresponding inner wall of the shell during assembly, a guiding structure on the spring effectively guides the shell during assembly, preventing the shell and the lead portion of the spring from abutting and jamming at the protrusion. This ensures smooth assembly of the shell and minimizes the squeezing effect of the shell on the spring arrangement structure during assembly, and / or reduces waste generation. This is particularly suitable and appropriate for snap-action electromagnetic relays where the moving spring assembly uses a side-mounted structure on the coil frame, and the corresponding inner wall of the shell requires a rubber-blocking rib. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the electromagnetic relay of this utility model.

[0055] Figure 2 for Figure 1 The diagram shows the structure of the outer casing mounted on the coil frame.

[0056] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0057] Figure 4 for Figure 3 The diagram shows the cooperation relationship between the guide protrusion and the guide flange of the moving spring assembly within the guide range.

[0058] Figure 5 for Figure 1 The diagram shows the three-dimensional structure of the electromagnetic relay after the outer casing has been removed.

[0059] Figure 6This is a schematic diagram of the moving spring assembly of this utility model (moving contacts are not shown).

[0060] Figure 7 for Figure 6 The right view.

[0061] Figure 8 for Figure 6 and Figure 7 The diagram shows a three-dimensional view of the moving spring assembly.

[0062] Figure 9 for Figure 8 A magnified view of a portion of the image.

[0063] Figure 10 This is a schematic diagram of the three-layer stacked spring pin portion of the spring assembly of this utility model in its unfolded state.

[0064] Meaning of the codes in the image:

[0065] 1—Coil frame; 11—Winding spool; 12—Base side baffle; 13—Contact side baffle; 14—Yoke assembly slot; 15—Limit stop; 151—Front stop post; 152—Top side folded edge; 153—Side side folded edge; 16—Moving spring side mounting slot;

[0066] 2—Moving spring assembly; 21—Moving spring body; 21′—First side surface; 22—Moving spring pin; 221—Pin base; 222—Left wing; 223—Right wing; 23—Guide protrusion; 24—Guide flange; 24′—Guide surface;

[0067] 3—Outer shell; 31—Glue-blocking rib;

[0068] 4—Yoke iron;

[0069] 5—Archive;

[0070] 6—Still spring assembly;

[0071] A—Set Direction;

[0072] B—Reference line;

[0073] C—left wing flap fold axis;

[0074] D—Right wing flap fold axis;

[0075] E—Maximum height of the guide protrusion;

[0076] F—Minimum mating distance of the guide surface;

[0077] G—Maximum mating distance of the guide surface. Detailed Implementation

[0078] This utility model relates to the field of electromagnetic relay technology, specifically a relay spring and housing mating structure, and a snap-fit ​​electromagnetic relay including this mating structure. The main technical solution of this utility model will be specifically described below with reference to several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings—that is… Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 The technical solution of this utility model is clearly and thoroughly explained; although other embodiments are not shown in separate drawings, their main structures can still be referred to the drawings of Embodiment 1.

[0079] It should be noted that the accompanying drawings of this utility model are schematic, and unnecessary details have been simplified to clarify the technical purpose of this utility model, so as to avoid obscuring the technical solution contributed by this utility model to the prior art. In addition, the expressions such as "about" and "basically" regarding quantity or fit relationship in the following text mean that reasonable assembly errors and processing errors are allowed in the industry, and do not literally describe absolute quantity or fit relationship.

[0080] Example 1

[0081] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the spring and housing mating structure of this utility model is adapted to a snap-action electromagnetic relay.

[0082] like Figure 1 , Figure 2 and Figure 5 As shown, the snap-action electromagnetic relay of this utility model includes an I-shaped coil frame 1, and a coil, iron core, yoke 4, armature 5, moving spring assembly 2, stationary spring assembly 6 and housing 3 assembled on the coil frame 1.

[0083] Because the electromagnetic relay of this utility model has a three-dimensional structure and is composed of multiple components, the following clear description of the component structure and their interrelationships will inevitably use directional terms such as front and back, up and down, left and right, inside and outside, width, and length. Therefore, to avoid confusion and misunderstanding of these directional terms, the following explanation is provided: the area where the yoke blade edge is located in the electromagnetic relay structure is referred to as "back"; the area corresponding to the yoke blade edge, the contact mating area, is referred to as "front"; the location of the contact side baffle of the coil frame is referred to as "up"; and the location of the base side baffle of the coil frame is referred to as "down". Figure 5 The positions of the yoke shown are in the main viewing direction, distinguished as "left" and "right" relative positions along the horizontal width of the armature / moving spring. The position facing the center of the coil frame is "inner," and the position opposite to the center of the coil frame is "outer." The length direction is from the pin to the contact point of the spring, and the width direction is perpendicular to the length (corresponding to the left-right direction). Other possible directional terms—such as "bottom" and "top"—are explained above; for example, "bottom" corresponds to "lower," and "top" corresponds to "upper."

[0084] like Figure 1 , Figure 2 and Figure 5 As shown, the coil frame 1 has an integrally formed winding drum 11, a base side baffle 12 at the lower end of the winding drum 11, and a contact side baffle 13 at the upper end of the winding drum 11. The base side baffle 12 is fitted with a yoke 4, coil leads, the moving spring lead portion 22 of the moving spring assembly 2, and the stationary spring lead portion of the stationary spring assembly 6, and fits into the opening end of the outer casing 3. Therefore, a yoke mounting groove 14 is formed on the base side baffle 12, and the opening end of the yoke mounting groove 14 faces rearward and is opposite to the contact mating area outside the contact side baffle 13. The contact side baffle 13 is fitted with an armature 5, a portion of the moving spring body portion 21 of the moving spring assembly 2, and a portion of the stationary spring body portion of the stationary spring assembly 6. A limiting stop 15 is protruding from the outer side of the contact side baffle 13.

[0085] like Figure 1 , Figure 2 and Figure 5 As shown, in order to constrain and limit the armature 5 assembled on the outside of the contact side baffle 13 and improve the anti-drop effect of the armature 5, two sets of limiting buckles 15 are integrally formed on the outside of the contact side baffle 13 of the coil frame 1, at the front two corners corresponding to the position where the armature is to be assembled, which can constrain and limit the armature 5 in place.

[0086] Specifically, each set of limiting stops 15 has a front stop post 151 located at the corresponding corner of the front end of the assembled armature 5, a top side folded-back edge 152 folded back on the front stop post 151 to the top side of the assembled armature 5, and a side folded-back edge 153 folded back on the front stop post 151 to the corresponding side edge of the assembled armature 5. The side folded-back edge 153 folds down at the corresponding edge of the top side folded-back edge 152. The top side folded-back edge 152 and the front stop post 151 are fitted with an L-shaped structure; the side folded-back edge 153 and the front stop post 151 are fitted with an L-shaped structure; the side folded-back edge 153 and the top side folded-back edge 152 are fitted with an L-shaped structure. To meet the technical requirements of process testing, the bottom edge of the side folded-back edge 153 of the limiting stop 15 is fitted with the contact side baffle 13 with a gap, leaving operating space for process testing.

[0087] The forming structure of the two sets of limiting buckles 15 on the contact side baffle 13 restricts the insertion space (i.e., forward assembly) of the armature 5 and the moving spring assembly 2 on the coil frame 1 from top to bottom. In other words, when the armature 5 and the moving spring assembly 2 are inserted into the coil frame 1 from top to bottom, the presence of the two sets of limiting buckles 15 prevents the armature 5 and the moving spring assembly 2 from being inserted into the set position. Therefore, based on the presence of the two sets of limiting buckles 15, the armature 5 and the moving spring assembly 2 cannot be inserted in the traditional top-bottom direction, and thus need to be changed to lateral assembly. In this way, the two sets of limiting buckles 15 on the outer side of the contact side baffle 13 form a passage for the armature 5 and the moving spring assembly 2 to be inserted from back to front (i.e., lateral assembly).

[0088] like Figure 1 , Figure 2 and Figure 5 As shown, the yoke 4 has an L-shaped structure, which corresponds to Figure 1 and Figure 2 The bottom of the transverse structure is inserted into the yoke mounting groove 14 of the base side baffle 12 of the coil frame 1 in a lateral assembly manner, corresponding to... Figure 1 The vertical structure shown in Figure 2 extends vertically upward at the opening end of the yoke assembly groove 14, and the top of the yoke 4 is located at the contact side baffle 13 of the coil frame 1.

[0089] like Figure 1 , Figure 2 and Figure 5As shown, the armature 5 is arranged on the outside of the contact side baffle 13 of the coil frame 1. The rear end of the armature 5 is located at the knife edge of the yoke 4, and the front end of the armature 5 is within the constraint range of the two sets of limiting stops 15. Of course, the armature 5 cannot be directly suspended on the outside of the contact side baffle 13, but needs to be supported by the moving spring assembly 2 connected to the yoke 4. The assembly structure of the armature 5 on the outside of the contact side baffle 13 needs to adapt to the electromagnetic attraction and the elasticity of the moving spring assembly 2 to perform downward (inward) / upward (outward) flipping actions. Therefore, the armature 5 should be in clearance fit with the two sets of limiting stops 15, and the clearance size of the clearance fit allows the armature 5 to perform flipping actions according to the design requirements.

[0090] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, the moving spring body 21 of the moving spring assembly 2 has an L-shaped bent structure. The bottom of its vertical part has a moving spring pin part 22, and the front of its horizontal part has a moving spring contact part. The vertical part of the moving spring body 21 is connected to the outer side of the yoke 4, and the horizontal part is connected to the outer side of the armature 5, so that the rear end of the armature 5 is assembled at the top of the yoke 4 through the moving spring body 21 (the top of the yoke where the armature is assembled is usually called the "knife edge" in the industry). Under the action of electromagnetic attraction and the moving spring body 21, the armature 5 can generate an inward / outward flipping action with the knife edge position of the yoke 4 as the "hinge".

[0091] To improve the drop resistance and limiting effect of the armature 5, a spring clearance notch can be made at the middle of the spring body 21 corresponding to the knife edge position of the yoke 4, and a boss that can abut against the knife edge position can be formed in the corresponding inner wall area of ​​the outer shell 3. This boss, in conjunction with the limiting stop 15 on the outer side of the contact side baffle 13, forms a three-dimensional constraint and limiting effect on the armature 5 in the front-back, up-down, and left-right directions, thus demonstrating the excellent drop resistance effect of the armature 5. Of course, the aforementioned boss on the outer shell 3 should be fitted with the armature 5 with a clearance that allows for a flipping action. To further constrain the armature 5 at the knife edge position of the yoke 4, the armature 5 has a U-shaped armature positioning notch at the knife edge position of the yoke 4, which is within the coverage area of ​​the spring clearance notch. When the outer shell 3 is assembled on the coil frame 1, the aforementioned boss of the outer shell 3 passes through the spring clearance notch of the spring body 21 and is inserted into the armature positioning notch of the armature 5.

[0092] like Figure 1 , Figure 2 and Figure 5As shown, based on the above-mentioned L-shaped structure, the moving spring assembly 2 cooperates with the yoke 4 and the armature 5. The moving spring pin 22 of the moving spring assembly 2 is assembled on the base side baffle 12 of the coil frame 1 at the yoke 4. The moving spring contact part of the moving spring assembly 2 extends out of the front end of the armature 5 and cooperates with the stationary spring assembly 6. That is, the arrangement position of the moving spring assembly 2 on the coil frame 1 is close to the inner wall of the outer shell 3 to be fitted. As described above, due to the restriction of the limiting stop 15, the armature 5 and the moving spring assembly 2 can only be assembled on the coil frame 1 in a lateral manner. That is, the moving spring assembly 2 is laterally assembled on the coil frame 1 in a manner corresponding to the assembly direction of the yoke 4 on the base side baffle 12. Therefore, in order to accommodate this lateral assembly, the base side baffle 12 at the yoke 4 has a U-shaped open structure moving spring side mounting groove 16, which is different from the conventional moving spring pin insertion hole. During the insertion process of the moving spring assembly 2 on the coil frame 1, the moving spring pin part 22 is assembled on the base side baffle 12 through the opening of the moving spring side mounting groove 16.

[0093] like Figure 1 , Figure 2 Figure 3 Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in order to improve the current carrying capacity of the thinner moving spring, reduce the temperature rise, and improve the structural rigidity, the moving spring pin portion 22 of the moving spring assembly 2 is a stacked structure. The moving spring pin portion 22 of the stacked structure protrudes from the adjacent moving spring body portion 21, and the protrusion direction is opposite to the yoke 4 - that is, close to the inner wall of the housing 3 to which it is mounted.

[0094] like Figure 8 , Figure 9 and Figure 10 As shown, the moving spring pin portion 22 of the moving spring assembly 2 has a three-layer stacked structure, which has a pin base portion 221 extending from the moving spring body portion 21, and a pin base portion 221 extending from the pin base portion 221 in the transverse width direction (i.e. Figure 10 The left wing 222 extends from the left side of the pin base portion 221 in the left-right direction (as shown in the left-right direction), and the right wing 223 extends from the right side of the pin base portion 221 in the right-right direction. The molding profile of the pin base portion 221 is adapted to the mounting limit in the spring-side mounting groove 16 of the base side baffle 12, and has a boss structure. The left wing 222 is folded back to the right in the right-right direction on the surface of the pin base portion 221 facing the outer shell 3 with the connection structure at the pin base portion 221 as the left wing folding axis C; the outline structure of the folded left wing 222 fits the pin base portion 221. The right wing 223 is folded back to the left in the right-right direction on the surface of the left wing 222 facing the outer shell 3 with the connection structure at the pin base portion 221 as the right wing folding axis D; the outline structure of the folded right wing 223 fits the pin base portion 221.

[0095] like Figure 2 As shown, the housing 3 of the aforementioned snap-fit ​​electromagnetic relay is mounted on the coil frame 1 in the direction from the contact side baffle 13 of the coil frame 1 to the base side baffle 12. That is, when the housing 3 is assembled on the coil frame 1, the mounting direction A follows the extension direction of the moving spring pin portion 22 of the moving spring assembly 2 mounted on the coil frame 1.

[0096] like Figure 1 , Figure 2 and Figure 3 As shown, because the spring pin 22 of the spring assembly 2 protrudes from the adjacent spring body 21 and is close to the inner wall of the housing 3, there is a positional interference during the assembly process of the housing 3 in the compact design structure. This positional interference is particularly prominent due to the presence of the adhesive-blocking rib 31 on the housing 3. This is because the spring assembly 2 needs to be laterally assembled on the base side baffle 12, and the base side baffle 12 has a U-shaped open spring side mounting groove 16. After the spring pin 22 is assembled into place, the excess portion of the spring side mounting groove 16 needs to be sealed to meet the technical requirements of adhesive sealing. Therefore, the inner wall of the housing 3 has a raised structure corresponding to the adhesive-blocking rib 31 of the spring side mounting groove 16 on the base side baffle 12. During the assembly of the outer casing 3, the adhesive-blocking rib 31 is close to the moving spring assembly 2 at the yoke 4; the assembled outer casing 3 makes the adhesive-blocking rib 31 cooperate with the moving spring side mounting groove 16 to form a limiting assembly of the moving spring assembly 2 on the base side baffle 12, that is, the adhesive-blocking rib 31 abuts against the corresponding surface of the moving spring pin 22 (including abutting fit or micro-gap fit allowed by design).

[0097] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, based on the protrusion of the spring pin portion 22 of the aforementioned spring assembly 2 towards the outer shell 3, and the phenomenon of positional interference with the outer shell 3 during the assembly process, in order to prevent the spring pin portion 22 from abutting and obstructing the outer shell 3 during the assembly process, a guide flange 24 with a curved surface structure is bent at the outer edge of the top of the spring pin portion 22 (i.e., near the top corner of the outer shell 3), corresponding to the assembly direction A of the outer shell 3. The guide flange 24 guides the outer shell 3 during the assembly process to prevent the outer shell 3 from abutting the top of the spring pin portion 22. The aforementioned guide flange 24 is an extended bent structure at the top of the right wing 223 of the aforementioned spring pin portion 22. It forms an upward and inward arc bend at the top of the overlapping pin portion 22 of the overlapping structure to eliminate the protrusion of the spring pin portion 22 as a protruding structure. Thus, when the outer shell 3 is in the process of assembly and may abut against the guide flange 24, it is guided by the curved surface structure of the guide flange 24 and will not abut or obstruct, and can continue to move forward to complete the assembly process.

[0098] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, relying solely on the guide flange 24 at the top of the moving spring pin 22 to guide the outer shell 3 during assembly has a relatively limited guiding effect. During assembly, the outer shell may become misaligned and come into contact with the root of the protrusion on the moving spring pin 22 (i.e., the area where the moving spring pin 22 is adjacent to the moving spring body 21), potentially causing jamming. To supplement the guiding effect of the guide flange 24 at the top of the moving spring pin 22, a guide protrusion 23 is integrally formed on the moving spring body 21 above the moving spring pin 22, protruding towards the inner wall of the outer shell 3. This guide protrusion 23 has a curved surface structure that conforms to the assembly direction A of the outer shell 3.

[0099] like Figure 4 As shown, the guide protrusion 23 of the moving spring body 21 complements the guiding effect of the guide flange 24 of the moving spring pin 22, and the guiding ranges of the two are connected and matched. Specifically, the surface of the moving spring body 21 used as the forming guide protrusion 23 is used as a reference reference surface - that is, the first side surface 21′; the maximum protrusion height of the guide protrusion 23 from the first side surface 21′ of the moving spring body 21 (i.e., Figure 4 The maximum height E of the guide protrusion is slightly greater than (to ensure the connection and fit effect in the assembly direction A, it is at least equal to) the minimum distance between the guide surface 24′ of the guide flange 24 (i.e., the guide structure at the top edge of the pin portion) and the first side surface 21′ of the moving spring body portion 21 (i.e., the minimum distance between the guide surface 24′ and the guide surface 24′ of the guide flange 24 (i.e., the guide surface 24′ of the guide flange 24) and the first side surface 21′ of the moving spring body portion 21. Figure 4The minimum mating distance F between the guide surface and the guide flange 24′ should be less than the maximum distance between the guide surface 24′ of the guide flange 24 and the first side surface 21′ of the moving spring body 21 (i.e., the minimum mating distance F between the guide surface and the guide flange 24′ of the guide flange 24′ and the first side surface 21′ of the moving spring body 21). Figure 4 The maximum guide distance G); the connection and fit relationship between the aforementioned guide protrusion 23 and guide fold 24 can be expressed as: F≤E<G. That is to say, in the fitting direction A of the outer shell 3, the maximum guide boundary of the guide protrusion 23 should be within the coverage area of ​​the guide fold 24 at the outer edge of the top of the moving spring pin 22. That is, the guide range of the guide protrusion 23 and the guide range of the guide fold 24 form a nested fit connection relationship on the side relative to the moving spring body 21. Thus, the vertical extension line of the guide fold 24 toward the minimum guide boundary of the moving spring body 21 - the reference line B - should be within the coverage area of ​​the guide protrusion 23. As mentioned above, in the aforementioned connection and fit relationship, it does not uniquely mean that the maximum guide boundary of the guide protrusion 23 is aligned with the minimum guide boundary of the guide fold 24. Usually, the maximum guide boundary of the guide protrusion 23 exceeds the minimum guide boundary of the guide fold 24, but is within the range of the maximum guide boundary of the guide fold 24. Thus, during the assembly of the outer casing 3, when the outer casing travels to the guide protrusion 23, it is guided downward by the conforming curved surface of the guide protrusion 23 and will not approach the moving spring body 21 too closely. During the continuous travel, it is guided by the conforming curved surface of the guide fold 24.

[0100] In the above-mentioned mating relationship between the moving spring assembly 2, the coil frame 1, and the housing 3, in order to limit the moving spring assembly 2 when it is installed on the opposite side and to achieve glue sealing, the moving spring side mounting groove 16 has at least one glue flow groove with a concave-convex structure on the surface of the moving spring pin 22 (i.e. the surface facing the glue-blocking rib 31 of the housing 3). When the moving spring pin 22 is installed in the moving spring side mounting groove 16, the inner surface of the moving spring pin 22 approaches and fits (including abutting fit or micro-gap fit allowed by design) the mating surface of the moving spring side mounting groove 16. The surface of the adhesive-blocking rib 31 that meets the moving spring pin portion 22 has at least one adhesive flow groove formed in a concave-convex structure, corresponding to the assembly direction A. When the adhesive-blocking rib 31 is assembled in place in the moving spring side mounting groove 16, the surface of the adhesive-blocking rib 31 that meets the moving spring pin portion 22 is close to the corresponding surface of the moving spring pin portion 22 (including abutting fit or micro-gap fit allowed by design).

[0101] Example 2

[0102] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0103] The guide flange at the top of the spring pin has a bent bevel structure on the side that faces the direction of the housing assembly.

[0104] And / or, the guide protrusion of the moving spring body has a beveled structure on the surface that conforms to the direction of the outer casing assembly.

[0105] Example 3

[0106] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0107] The guide protrusion on the moving spring body is a combination connection structure of the protrusion on the moving spring body, such as a riveting structure or welding structure similar to the moving contact / stationary contact.

[0108] Example 4

[0109] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0110] The stacked structure of the moving spring pin portion consists of multiple independently formed stacked pieces, which are stacked layer by layer on the pin base portion extending from the moving spring body portion. These stacked structures are fixed by riveting or welding, and the top of the outermost stacked piece forms a guide fold.

[0111] Example 5

[0112] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0113] The right wing of the moving spring pin is close to the pin base, and the left wing of the moving spring pin is close to the right wing. The top of the left wing forms a guide fold.

[0114] Example 6

[0115] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0116] The moving spring pin is a material thickening structure of the moving spring sheet, that is, the moving spring pin protrudes directly from the adjacent part of the moving spring body due to the material thickness, without the need to form a stacked sheet structure;

[0117] The outer edge of the top of the moving spring pin is treated with a beveled / curved surface to form a guide structure.

[0118] Example 7

[0119] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0120] Based on design considerations such as clearance, the spring pin is bent and protruded towards the inner wall of the outer casing. The thickness of the spring pin remains unchanged and is basically the same as the thickness of the spring body.

[0121] The outer edge of the bent protrusion at the pin of the moving spring is treated with a slope / curved surface to form a guide structure.

[0122] Of course, this embodiment will also lose the technical effect brought about by thickening the moving spring pin.

[0123] Example 8

[0124] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0125] The guide protrusion structure on the main body of the moving spring is removed, and the outer shell is guided only by the guide fold at the top of the moving spring pin during assembly. Of course, this embodiment also loses the supplementary guiding effect of the guide protrusion on the guide fold.

[0126] Example 9

[0127] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0128] The limiting buckles on the outer side of the contact side baffle of the coil frame are arranged on the left and right sides of the armature in the horizontal width direction, in the non-front end area, similar to the limiting buckle technology disclosed in Chinese Patent Document Publication No. CN 118969563 A.

[0129] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0130] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features. For example, the design structure of the electromagnetic relay may adopt a push rod type to adapt to the dynamic spring assembly and housing structure of the present invention (of course, due to the change in the design structure of the electromagnetic relay, the spring near the housing is no longer limited to the dynamic spring assembly, but may be a static spring assembly, which is especially prominent in push rod type electromagnetic relays); and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A relay spring and housing mating structure, comprising a spring and a housing assembled on a base (3); The arrangement of the reeds on the base is close to the corresponding inner wall of the outer shell (3); When the outer shell (3) is assembled on the base, the fitting direction (A) is along the extension direction of the pin portion of the spring sheet assembled on the base; Its features are: The pin portion of the reed protrudes at the adjacent reed body portion and is close to the inner wall of the housing (3) to which it is fitted; Corresponding to the mounting direction (A) of the housing (3), the spring has a guide structure that guides the housing (3) during the mounting process to prevent the housing (3) from abutting the top of the pin portion.

2. The relay spring and housing mating structure according to claim 1, characterized in that: The guide structure is formed at the top outer edge of the pin portion, and is a curved / sloping structure at the top outer edge of the pin portion that conforms to the fitting direction (A) of the outer shell (3).

3. The relay spring and housing mating structure according to claim 2, characterized in that: The pin portion is a multi-layered stacked structure, having a pin base portion extending from the spring body portion, and multiple stacked pieces stacked on the side of the pin base portion adjacent to the housing (3) being fitted; The guide structure is a guide fold formed on the top of the stacked plate away from the pin base.

4. The relay spring and housing mating structure according to claim 3, characterized in that: The pin portion has a three-layer stacked structure, including a pin base portion extending from the spring body portion, a left wing portion extending from the left side of the pin base portion in the horizontal direction and engaging with the pin base portion after stacking, and a right wing portion extending from the right side of the pin base portion in the horizontal direction and engaging with the pin base portion after stacking. The left wing is overlapped in the transverse direction with a rightward folding structure on the surface of the pin base / the right wing facing the outer shell (3); The right wing is overlapped in the transverse direction with a leftward folding structure on the surface of the pin base / the left wing facing the outer shell (3).

5. The relay spring and housing mating structure according to any one of claims 2 to 4, characterized in that: The spring body portion above the pin portion has a protruding guide protrusion that is close to the inner wall of the housing (3) to which it is fitted; The guide protrusion has a curved / sloping surface structure that conforms to the fitting direction (A) of the outer shell (3).

6. The relay spring and housing mating structure according to claim 5, characterized in that: The maximum protrusion height of the guide protrusion from the first side surface of the reed body is greater than or equal to the minimum distance between the guide surface of the outer edge guide structure at the top of the pin and the first side surface of the reed body, and less than the maximum distance between the guide surface of the outer edge guide structure at the top of the pin and the first side surface of the reed body. The first side surface of the reed body is the surface on which the guide protrusion is provided.

7. The relay spring and housing mating structure according to claim 5, characterized in that: The guide protrusion is a stamped protrusion structure integrally formed on the spring body.

8. A snap-action electromagnetic relay, comprising a coil frame (1), a moving spring assembly (2) mounted on the coil frame (1), and a housing (3). Its features are: The moving spring assembly (2) and the housing (3) have a mating structure as described in any one of claims 1 to 7.

9. The snap-action electromagnetic relay according to claim 8, characterized in that: The coil frame (1) has an I-shaped structure and has a base side baffle (12) and a contact side baffle (13) at both ends of the winding drum (11). An L-shaped yoke (4) is mounted on the base side baffle (12), and the blade of the yoke (4) extends to the contact side baffle (13). At the blade position of the yoke (4), an armature (5) located outside the contact side baffle (13) is assembled through the moving spring assembly (2). The spring pin (22) of the spring assembly (2) is mounted on the base side baffle (12) at the position of the yoke (4); The outer casing (3) is mounted on the coil frame (1) in the direction from the contact side baffle (13) to the base side baffle (12).

10. The snap-action electromagnetic relay according to claim 9, characterized in that: The moving spring assembly (2) is laterally mounted on the coil frame (1) in a direction corresponding to the mounting direction of the yoke (4) on the base side baffle (12); Correspondingly, the base side baffle (12) has a U-shaped open structure for the moving spring side mounting groove (16). During the installation of the moving spring assembly (2) on the coil frame (1), the moving spring pin (22) is mounted on the base side baffle (12) through the opening of the moving spring side mounting groove (16); The inner wall of the outer shell (3) has raised rubber-blocking ribs (31) corresponding to the side mounting groove (16) of the moving spring. During the assembly of the outer shell (3), the adhesive-blocking rib (31) is located near the moving spring assembly (2) of the yoke (4). The housing (3) is fitted into place, so that the rubber-blocking rib (31) cooperates with the moving spring side mounting groove (16) to form a limiting assembly of the moving spring assembly (2) on the base side baffle (12).

11. The snap-action electromagnetic relay according to claim 10, characterized in that: The side mounting groove (16) of the moving spring has at least one glue flow groove with a concave-convex structure on the surface of the moving spring pin (22) corresponding to the thickness direction of the base side baffle (12). When the moving spring pin (22) is assembled in the side mounting groove (16), the corresponding surface of the moving spring pin (22) cooperates with the mating surface of the side mounting groove (16). And / or, the adhesive-blocking rib (31) has at least one adhesive flow groove corresponding to the assembly direction (A) formed on the surface of the moving spring pin (22) with a concave-convex structure. When the adhesive-blocking rib (31) is assembled in the moving spring side mounting groove (16), the surface of the adhesive-blocking rib (31) that meets the moving spring pin (22) is in sync with the corresponding surface of the moving spring pin (22).

12. The snap-action electromagnetic relay according to claim 10, characterized in that: The contact side baffle (13) of the coil frame (1) has a limiting buckle (15) protruding on both sides of the armature (5) and / or the moving spring assembly (2) in the horizontal direction to constrain and limit the outward turning action. The two sets of limiting buckles (15) on the contact side baffle (13) constitute the insertion channel for the lateral assembly of the moving spring assembly (2); When the moving spring assembly (2) is laterally assembled on the coil frame (1), the moving spring assembly (2) and / or the armature (5) pass through the insertion channel formed by the limiting stop (15) on the contact side baffle (13).

13. The snap-action electromagnetic relay according to claim 12, characterized in that: The limiting buckle (15) on the contact side baffle (13) is formed at the corresponding corner of the armature (5) away from the yoke (4); The limiting stop (15) has a front stop post (151) at the end of the armature (5) and a top side folded edge (152) folded back on the front stop post (151) to the top side of the armature (5), the top side folded edge (152) and the front stop post (151) are engaged in an L-shaped structure.

14. The snap-action electromagnetic relay according to claim 13, characterized in that: The limiting stop (15) also has a side folded edge (153) that folds back on the front stop (151) to the left / right side of the armature (5), and the side folded edge (153) and the front stop (151) are engaged in an L-shaped structure.

15. The snap-action electromagnetic relay according to claim 14, characterized in that: The side folded edge (153) of the limiting stop (15) folds down at the corresponding edge of the top folded edge (152). The side folded edge (153) and the top folded edge (152) are fitted in an L-shaped structure, and the bottom edge of the side folded edge (153) is fitted with the contact side baffle (13) at a distance.

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