Clapper type relay

Abstract

The utility model discloses a clapper-type relay, which comprises a shell and an electromagnetic part, the electromagnetic part comprises a magnetic circuit part and a movable spring armature part; the magnetic circuit part comprises a coil rack provided with a base; the movable spring armature part comprises a movable spring and an armature, and an assembling groove for laterally installing a movable spring sheet pin of the movable spring is formed in one side of the circumferential direction of the base; a boss extending towards the direction of the assembling groove is arranged at the position, corresponding to the assembling groove, of the inner wall of the shell; after the movable contact spring pin is installed in the assembling groove, one side, far away from the opening of the groove, of the pin part, located in the assembling groove, of the movable contact spring pin is in clearance fit with the assembling groove. After the shell is installed on the base, the boss is inserted into the assembling groove, and the side, facing the movable contact spring pin, of the boss is in clearance fit with the pin part, located in the assembling groove, of the movable contact spring pin. The sealing structure has the advantages of simple structure, good sealing performance and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to relay technology field, and specifically is a kind of clap type relay. BACKGROUND

[0002] Electromagnetic relay is a kind of device that can convert electric energy into magnetic energy to work, so as to achieve the device of small current control large current, electromagnetic relay is internally installed with armature. In some existing relays, limit buckle structure for limiting the up-down direction of armature is arranged on the coil frame, which causes the dynamic spring of the dynamic spring armature part to be unable to be vertically assembled, and the dynamic spring needs to be assembled in a side manner. For example, the Chinese patent document discloses "a relay with enhanced insulation" (publication number CN218996610U, publication date May 09, 2023). When using the side mounting method, an assembly groove for mounting the dynamic spring pin is needed to be opened on the base of the coil frame; the opening of such assembly groove is usually a large slot, and in actual use, there are problems of poor sealing performance and glue leakage at the assembly groove.

[0003] At the same time, when dispensing glue at the dynamic spring pin assembled in the assembly groove, the glue is likely to flow along the dynamic spring pin to the surrounding of the dynamic spring pin and to other internal positions, resulting in poor sealing performance. For example, when the dynamic spring pin adopts a laminated structure, the gap of the laminated sheet directly affects the sealing performance of the relay. In actual use, in order to improve the sealing performance, the gap of the laminated sheet also needs to be dispensed with glue, the longer the gap is covered with glue, the better the sealing performance. However, during the dispensing process, the glue will flow along the dynamic spring pin to the surrounding of the dynamic spring pin and to other internal positions, which cannot guarantee the coverage of the gap, thereby resulting in poor sealing performance.

[0004] Therefore, the relay with the above structure in the prior art has the problem of poor sealing performance. SUMMARY

[0005] The utility model aims at: in view of the deficiency of prior art, provide a kind of clap type relay with simple structure and good sealing performance.

[0006] The technical purpose of the utility model is realized by the following technical scheme:

[0007] A snap-on relay includes a housing and an electromagnetic part; the electromagnetic part includes a magnetic circuit part and a moving spring armature part; the magnetic circuit part includes a coil holder provided with a base; the moving spring armature part includes a moving spring and an armature, and has an assembly groove on a circumferential side of the base for laterally assembling a moving spring armature pin of the moving spring; an inner wall of the housing is provided with a boss extending towards the assembly groove at a position corresponding to the assembly groove; after the moving spring armature pin is assembled into the assembly groove, a pin portion of the moving spring armature pin in the assembly groove is in clearance fit between the assembly groove and a side away from the opening of the assembly groove; after the housing is mounted on the base, the boss is inserted into the assembly groove, and a side of the boss facing the moving spring armature pin is in clearance fit between the pin portion of the moving spring armature pin in the assembly groove.

[0008] Preferably, the boss extends towards the assembly groove, and the extension length of the boss is less than the depth of the assembly groove; the width of the boss is slightly less than or equal to the opening width of the assembly groove; the bottom side of the boss is flush with the bottom side of the assembly groove, and the height of the boss is equal to or greater than the height of the assembly groove.

[0009] Preferably, a side surface of the boss facing the moving spring armature pin is provided with at least one rib structure, and the rib structure is in clearance fit with the moving spring armature pin to form a glue guide channel.

[0010] Preferably, the rib structure is a plurality of convex ribs arranged at intervals.

[0011] Preferably, a side wall of the assembly groove away from the opening of the assembly groove is provided with a concave-convex structure, and the concave-convex structure is in clearance fit with the moving spring armature pin to form a glue guide channel.

[0012] Preferably, the convex part of the concave-convex structure has a trapezoidal, rectangular or arc-shaped cross section.

[0013] Preferably, the moving spring armature pin includes a horizontal section located in the relay and a vertical section mounted in the assembly groove, and the lower end of the vertical section extends out of the lower end of the base; the lower side of the horizontal section is close to the base; the upper side of the base is provided with a sunken glue storage groove corresponding to the lower side of the horizontal section, and the glue storage groove and the assembly groove are in communication with each other.

[0014] Preferably, the lower side of the horizontal section of the moving spring armature pin is provided with an extension part extending towards the glue storage groove.

[0015] Preferably, the extension part and the glue storage groove are in clearance fit, and the clearance distance is greater than or equal to 0.1 mm.

[0016] Preferably, the vertical section of the moving spring armature pin is provided with a horizontally opened glue containing groove on a side facing the boss or a side away from the boss; the glue containing groove is partially located in the assembly groove, and the other part is located outside the lower side of the base.

[0017] Preferably, the moving spring pin is a single spring pin or a multi-layer spring pin.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] 1. The utility model discloses a circumferential side of base has the assembly recess for the lateral loading moving spring pin of moving spring of the side, and the outer wall of shell is equipped with the boss that extends to the assembly recess position corresponding assembly recess, and the pin portion of moving spring pin is apart from the recess opening side and the gap cooperation between assembly recess after moving spring pin loads into assembly recess, and the boss is inserted into assembly recess after the shell is installed on the base, and the gap cooperation between the pin portion of moving spring pin and the boss in assembly recess is matched to the side of moving spring pin. Through setting up the boss of inserting assembly recess on the shell, the opening area of recess bottom side exposure is reduced significantly, and the dust, humidity and other pollutants of relay outside enter the inside of relay, and the risk of glue leakage is reduced simultaneously. The boss is simple in structure, and the manufacturing cost is low. The gap cooperation between the boss and moving spring pin guarantees assembly accuracy, and provides controllable flow path for glue, improves the sealing property, and avoids the sealing defect of traditional big opening recess simultaneously. Adopting the technical measures, has the advantages of simple structure and can effectively improve the sealing performance.

[0020] 2. The boss of the utility model extends to the direction of assembly recess, and the extension length of the boss is less than the depth of assembly recess, the width of the boss is slightly less than or equal to the opening width of assembly recess, the bottom side of the boss is flush with the bottom side of assembly recess, and the height of the boss is equal to or greater than the height of assembly recess. By accurately matching the size of the boss and assembly recess, the depth, opening width and height of the boss matched recess are ensured, a physical barrier is formed, the dust, humidity and other pollutants outside the relay can be effectively blocked from invading the contact area, and the sealing property at the moving spring pin can be further guaranteed. The bottom side alignment design enhances the continuity of sealing, prevents glue from overflowing from the bottom, and avoids assembly interference caused by size mismatch.

[0021] 3. The side surface of the boss of the utility model towards moving spring pin is equipped with at least one rib structure, and the gap cooperation between the rib structure and moving spring pin forms a glue guide channel. The rib structure forms a glue guide channel in the gap, guides the glue to flow along the predetermined path, and avoids the disordered diffusion of glue to other areas. The rib structure on the surface of the boss increases the contact area of glue and recess, and enhances the adhesive force of glue. The glue guide channel of gap cooperation can guide the glue to penetrate into the deep gap of the laminated sheet, which can reduce the waste of glue and improve the sealing efficiency.

[0022] 4. The assembly groove side wall away from the groove opening side is provided with a concave-convex structure, and the concave-convex structure is matched with the gap between the moving spring sheet pin, a glue guide channel is formed, the glue is guided to flow along the predetermined path, and the glue is prevented from diffusing to other areas in disorder. The concave-convex structure of the assembly groove side wall increases the contact area of the glue and the groove, and enhances the adhesive force of the glue. The gap-matched glue guide channel can guide the glue to penetrate into the deep part of the lamination gap, and solves the problem of insufficient glue coverage of the traditional flat-wall groove.

[0023] 5. The moving spring sheet pin of the utility model comprises a horizontal section located in the relay and a vertical section installed in the assembly groove, and the lower end of the vertical section extends out of the lower end of the base; the lower side of the horizontal section is close to the base; a sunken glue storage groove is arranged on the upper side of the base corresponding to the lower side of the horizontal section, and the glue storage groove is in communication with the assembly groove. By adopting the technical measure, the glue storage groove can concentrate the filling of the pin root, and strengthen the sealing of the weak area. Meanwhile, when the moving spring sheet is a multi-lamination pin, the glue can penetrate along the lamination gap through the capillary effect, the technical advantages of effectively improving the filling rate are achieved; and the glue flows to the lamination gap, the coverage area of the glue in the gap is increased, and the technical advantages of effectively improving the sealing performance of the product are achieved.

[0024] 6. The horizontal section of the moving spring sheet pin is provided with an extension part extending towards the glue storage groove. By arranging the extension part towards the glue storage groove, the extension part can be fixed with the glue, the bonding area of the extension part and the glue is increased, and the bonding strength is improved. Meanwhile, by adopting the structure, the glue can fully fill the gap between the extension part and the glue storage groove, and a more uniform bonding interface is formed. Compared with the traditional planar bonding, the three-dimensional structure of the extension part can reduce the risk of uneven distribution of the glue or local stress concentration, thereby improving the overall bonding strength and durability.

[0025] 7. The extension part and the glue storage groove are matched with a gap, and the gap distance is greater than or equal to 0.1mm. By adopting the technical measure, the glue is prevented from being blocked, and the glue is ensured to be fully filled.

[0026] 8. The vertical section of the moving spring sheet pin is provided with a glue containing groove with a horizontal opening on the side facing the boss or the side away from the boss; a part of the glue containing groove is located in the assembly groove, and another part is located outside the lower side of the base. By adopting the technical measure, the fixing reliability, the sealing performance and the environmental interference resistance of the moving spring sheet pin are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the utility model;

[0028] Figure 2 is Figure 1 a structural schematic view without a shell;

[0029] Figure 3 isFigure 1 Bottom view of the middle shell;

[0030] Figure 4 Bottom view of the middle shell; Figure 1 Bottom view of the middle shell;

[0031] Figure 5 Bottom view of the middle shell; Figure 4 Enlarged view of A part of the middle shell;

[0032] Figure 6 Structure diagram of the dynamic spring pin provided with a glue containing groove;

[0033] Reference numerals: 1 - coil holder; 11 - base; 111 - assembly groove; 1111 - concave-convex structure; 112 - glue containing groove; 2 - shell; 21 - boss; 211 - convex rib;

[0034] 3 - armature; 4 - dynamic spring; 41 - dynamic spring pin; 411 - vertical section; 412 - horizontal section; 413 - extension; 414 - glue containing groove. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0038] Embodiment 1

[0039] As Figure 1 — Figure 6As shown in the figure, a snap-on relay includes a shell 2 and an electromagnetic part; the electromagnetic part includes a magnetic circuit part and a moving spring armature part; the magnetic circuit part includes a coil holder 1 provided with a base 11; the moving spring armature part includes a moving spring 4 and an armature 3, and has an assembly groove 111 for laterally assembling a moving spring armature pin 41 of the moving spring 4 on a circumferential side of the base 11; the shell 2 is provided with a boss 21 extending towards the assembly groove 111 at a position corresponding to the assembly groove 111; after the moving spring armature pin 41 is assembled into the assembly groove 111, a pin portion of the moving spring armature pin 41 in the assembly groove 111 is matched with a gap between the assembly groove 111 and a side away from the groove opening; after the shell 2 is assembled on the base 11, the boss 21 is inserted into the assembly groove 111, and a side of the boss 21 facing the moving spring armature pin 41 is matched with a gap between the pin portion of the moving spring armature pin 41 in the assembly groove 111. By arranging the boss 21 inserted into the assembly groove 111 on the shell 22, the opening area of the groove bottom exposed outside is significantly reduced, the pollutants such as dust and moisture outside the relay are prevented from entering the inside of the relay, and the risk of glue leakage is also reduced. The boss 21 has a simple structure and low manufacturing cost. The gap matching between the boss 21 and the moving spring armature pin 41 not only ensures the assembly precision, but also provides a controllable flow path for the glue, improves the sealing performance, and avoids the sealing defects of the traditional large-opening groove. The technical measure has the advantages of simple structure and effectively improved sealing performance of the moving spring armature pin 41.

[0040] As shown in the figure, Figure 1 Figure 6 As shown in the figure, in the embodiment, the base 11 of the coil holder 1 is provided with an assembly groove 111 for assembling the moving spring armature pin 41 of the moving spring 4 on the left side in the circumferential direction. The moving spring armature pin 41 of the moving spring 4 is assembled into the assembly groove 111 from the left side; the left inner wall of the shell 22 is provided with a boss 21 extending towards the assembly groove 111 at a position corresponding to the assembly groove 111. In actual use, the boss 21 can extend from the bottom to the top of the left inner wall of the shell 2. After the moving spring armature pin 41 is assembled into the assembly groove 111, the right side of the moving spring armature pin 41 is matched with a gap between the assembly groove 111.

[0041] In the embodiment, the moving spring armature pin 41 is a single spring armature pin or a multi-lamella pin. When the moving spring armature pin 41 is a multi-lamella pin, the moving spring armature pin 411 is at least formed by laminating two layers of lamella.

[0042] In specific implementation, the assembly groove 111 is a U-shaped groove. When the moving spring armature pin 41 is assembled, the moving spring armature pin 41 advances from the opening of the U-shaped groove to the bottom wall of the U-shaped groove along the assembly direction of the moving spring armature pin 41. The direction in which the opening of the U-shaped groove advances to the bottom side of the U-shaped groove is the depth direction of the assembly groove 111. The vertical distance between the opposite two sides of the U-shaped groove is the opening width of the assembly groove 111.

[0043] ​The corresponding relationship between the length, width and height of the boss 21 and the depth, opening width and height of the assembly groove 111 is as follows: the extension length direction of the boss 21 corresponds to the depth direction of the assembly groove 111; the width direction of the boss 21 corresponds to the opening width (the opening width of the U-shaped groove) of the assembly groove 111; as shown in Figure 2 In the present embodiment, the height of the assembly groove 111 is the thickness of the base 11 at the position where the assembly groove 111 is formed, and the height corresponding to the assembly groove 111 is the height direction of the boss 21.

[0044] In actual use, the boss 21 extends towards the assembly groove 111, and the extension length of the boss 21 is less than the depth of the assembly groove 111; the width of the boss 21 is slightly less than or equal to the opening width of the assembly groove 111; the bottom side of the boss 21 is flush with the bottom side of the assembly groove 111, and the height of the boss 21 is equal to or greater than the height of the assembly groove 111. In specific implementation, the extension length of the boss 21 is less than the depth of the assembly groove 111; further, the extension length of the boss 21 is less than the distance between the groove opening and the pin portion of the moving reed pin 41 in the assembly groove 111. By precisely matching the sizes of the boss 21 and the assembly groove 111, it is ensured that the boss 21 matches the depth, opening width and height of the assembly groove 111, forming a physical barrier that can effectively block the intrusion of dust, moisture and other pollutants from the outside of the relay into the contact area, and can further ensure the sealing performance of the moving reed pin 41. The bottom side alignment design enhances the continuity of the sealing, prevents glue from overflowing from the bottom, and avoids assembly interference caused by size mismatch.

[0045] As shown in Figure 4 , Figure 5 , at least one rib-shaped structure is arranged on the side surface of the boss 21 facing the moving reed pin 41, and the rib-shaped structure is gap-fitted with the moving reed pin 41 to form a glue guide channel. The rib-shaped structure forms a glue guide channel in the gap, guiding the glue to flow along a predetermined path and avoiding disordered diffusion of the glue to other areas. The rib-shaped structure on the surface of the boss 21 increases the contact area between the glue and the groove, enhancing the adhesion of the glue. The gap-fitted glue guide channel can guide the glue to penetrate deep into the gap between the laminations, which not only reduces the waste of glue, but also improves the sealing efficiency.

[0046] In the present embodiment, a plurality of rib-shaped structures are arranged on the right side surface of the boss 21. Specifically, the rib-shaped structures are two parallel moving ribs 211. By adopting this technical measure, the plurality of spaced-apart ribs 211 form a multi-channel flow guide, making the glue distribution more uniform and covering a larger gap area. This is especially suitable for the moving reed pin 41 with a multi-layer lamination structure, ensuring that the gap between each layer of laminations is filled with glue.

[0047] As shown in Figure 4 , Figure 5As shown, the side wall of the assembly groove 111 away from the groove opening is provided with a concave-convex structure 1111, and the concave-convex structure 1111 is gap-fitted with the moving spring leaf pin 41 to form a glue guiding channel. The glue guiding channel formed guides the glue to flow along a predetermined path, avoiding the glue to spread disorderly to other areas. The concave-convex structure 1111 of the side wall of the assembly groove 111 increases the contact area of the glue with the groove, and enhances the adhesive force of the glue. When the moving spring leaf is a multi-leaf pin, the gap-fitted glue guiding channel can guide the glue to penetrate into the deep part of the leaf gap, solving the problem of insufficient glue coverage of the traditional flat-wall groove.

[0048] In the embodiment, the side wall of the assembly groove 111 away from the groove opening (the opening of the U-shaped groove) is the right side wall (the bottom wall of the U-shaped groove) of the assembly groove 111, and the concave-convex structure 1111 is provided on the right side wall of the assembly groove 111, and the concave-convex structure 1111 is gap-fitted with the moving spring leaf pin 41. The concave-convex structure 1111 can form a directional glue flow channel to guide the glue solution to uniformly fill the gap and avoid local accumulation or lack. By using the technical measure, the glue distribution can be effectively controlled and the sealing performance can be improved.

[0049] In specific implementation, the convex part of the concave-convex structure 1111 has a trapezoidal, rectangular or arc-shaped cross section. The concave-convex structure with different cross-sectional shapes (such as trapezoidal, rectangular and arc-shaped) adapts to different glue flowability requirements. For example, the arc-shaped cross section reduces the flow resistance, and the rectangular cross section increases the glue retention amount, thereby optimizing the sealing effect.

[0050] Embodiment 2

[0051] As shown in Figure 2 , Figure 6 The other contents of the embodiment are the same as those of Embodiment 1, and the difference lies in that:

[0052] The moving spring leaf pin 41 includes a horizontal section 412 located in the relay and a vertical section 411 installed in the assembly groove 111, and the lower end of the vertical section 411 extends out of the lower end of the base 11. The lower side of the horizontal section 412 is close to the base 11. The upper side of the base 11 is provided with a sunken glue storage groove 112 corresponding to the lower side of the horizontal section 412, and the glue storage groove 112 is in communication with the assembly groove 111.

[0053] In the embodiment, the dynamic spring pin 41 is in the shape of the Chinese character "R" as a whole, which comprises a vertical segment 411 and a horizontal segment 412. The horizontal segment 412 is a spring connecting segment fixedly connected to the upper end of the vertical segment 411, and the horizontal segment 412 is located on the upper side of the base 11 (inside the relay). The vertical segment 411 is the dynamic spring pin body installed in the assembly groove 111, and the lower end of the vertical segment 411 extends out of the lower end of the base 11 (outside the relay). The upper end of the spring connecting segment is connected to the dynamic spring of the dynamic spring 4. The glue storage groove 112 is in communication with the assembly groove 111 to form a glue storage area, which prevents the glue from directly overflowing to the horizontal segment 412 during glue dispensing. When the dynamic spring pin 41 is a single spring pin or a multi-layer spring pin, the glue storage groove 112 can be filled at the root of the pin to strengthen the sealing of the weak area. At the same time, when the dynamic spring pin 41 is a multi-layer spring pin, it also has the technical advantages of enabling the glue to penetrate along the gap between the layers by capillary effect, effectively improving the filling rate, and enabling the glue to flow to the gap between the layers, increasing the coverage area of the glue in the gap, and effectively improving the sealing performance of the product.

[0054] As shown in Figure 2 , Figure 6 , the lower side of the horizontal segment 412 of the dynamic spring pin 41 is provided with an extension 413 extending towards the glue storage groove 112.

[0055] In the embodiment, by providing the extension 413 extending towards the glue storage groove 112, the extension 413 can be fixed with the glue, increasing the bonding area between the extension 413 and the glue and improving the bonding strength. Specifically, by extending towards the glue storage groove 112, the extension 413 can significantly increase the contact area between the spring and the glue. This structure design enables the glue to fully fill the gap between the extension 413 and the glue storage groove 112, forming a more uniform bonding interface. Compared with traditional planar bonding, the three-dimensional structure of the extension 413 can reduce the risk of uneven glue distribution or local stress concentration, thereby improving the overall bonding strength and durability.

[0056] The gap between the extension 413 and the glue storage groove 112 is matched, and the gap distance is greater than or equal to 0.1 mm. In specific implementation, according to the depth of the glue storage groove 112, the lower side of the extension 413 can be arranged to be flush with the glue storage groove 112 or to be deep into the glue storage groove 112. At the same time, a certain gap is required on the side opposite to the glue storage groove 112, and the gap distance cannot be too small, otherwise the gap will hinder the flow of the glue and directly solidify. In actual use, the gap distance between the extension 413 and the glue storage groove 112 is greater than or equal to 0.1 mm. By adopting this technical measure, the glue is prevented from being blocked, and the glue is ensured to be fully filled.

[0057] Embodiment 3

[0058] As shown in Figure 6 , the other contents of the embodiment are the same as those of Embodiments 1 and 2, and the difference lies in that

[0059] The vertical section 411 of the moving spring pin 41 has a horizontally open glue-receiving groove 414 on the side facing the boss 21 or the side away from the boss 21; part of the glue-receiving groove 414 is located in the mounting groove 111, and the other part is located on the lower side of the base 11.

[0060] like Figure 6 As shown, in this embodiment, the vertical segment 411 of the movable spring pin 41 has a horizontally open adhesive-containing groove 414 on the side facing the boss 21; the upper part of the adhesive-containing groove 414 is located in the mounting groove 111, and the lower part of the adhesive-containing groove 414 is located outside the lower side of the base 11. The adhesive-containing groove 414 is located in the vertical segment 411, covering both the internal area of ​​the mounting groove 111 and extending to the outside of the base 11, expanding the adhesive coverage area. The horizontal opening design facilitates adhesive injection and ensures a full-range seal at the joint between the pin and the groove. The horizontal design of the adhesive-containing groove 414 also provides a channel for the gas to escape during adhesive curing, reducing air bubble residue. The groove structure of the adhesive-containing groove 414 can disperse external vibration or impact forces, reducing the risk of pin cracking due to stress concentration. The continuous sealing path of the adhesive-containing groove 414 can prevent external dust and moisture from entering. Using this technical measure, the adhesive can be guided to fill evenly along the groove, forming a continuous sealing layer. This structure can avoid adhesive accumulation or uneven distribution, ensuring the bonding strength between the pin and the base 11. When the moving spring is a multi-layered pin, the adhesive groove 414 further lengthens the sealing path of the adhesive at the gap of the layers, so as to solve the problem that when the adhesive groove space (the adhesive storage space corresponding to the height of the assembly groove) of the gap of the layers is insufficient, it may lead to poor sealing of the gap of the layers, and further improves the fixing reliability, sealing performance and anti-environment interference ability of the moving spring pin 41.

[0061] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A snap-action relay comprising a housing and an electromagnetic part; the electromagnetic part comprising a magnetic circuit part and a moving spring armature part; the magnetic circuit part comprising a coil holder provided with a base; the moving spring armature part comprising a moving spring arm and an armature, characterized in that a fitting groove for laterally fitting a moving spring arm pin of the moving spring arm on a circumferential side of the base; a boss extending towards the fitting groove is provided on the inner wall of the housing at the position corresponding to the fitting groove; after the moving spring arm pin is fitted into the fitting groove, the pin portion of the moving spring arm pin in the fitting groove is in clearance fit with the side of the fitting groove away from the groove opening; after the housing is mounted on the base, the boss is inserted into the fitting groove, and the side of the boss facing the moving spring arm pin is in clearance fit with the pin portion of the moving spring arm pin in the fitting groove.

2. The snap-action relay according to claim 1, characterized in that The boss extends towards the fitting groove, and the extension length of the boss is less than the depth of the fitting groove; The width of the boss is slightly less than or equal to the opening width of the fitting groove; The bottom side of the boss is flush with the bottom side of the fitting groove, and the height of the boss is equal to or greater than the height of the fitting groove.

3. The snap-action relay according to claim 1 or 2, characterized in that At least one rib structure is provided on the side surface of the boss facing the moving spring arm pin, and the rib structure is in clearance fit with the moving spring arm pin to form a glue guide channel.

4. The snap-action relay according to claim 3, characterized in that The rib structure is a plurality of convex ribs arranged at intervals.

5. The snap-action relay according to claim 1 or 2, characterized in that A concave-convex structure is provided on the side wall of the fitting groove away from the groove opening, and the concave-convex structure is in clearance fit with the moving spring arm pin to form a glue guide channel.

6. The snap-action relay according to claim 5, characterized in that The convex part of the concave-convex structure has a trapezoidal, rectangular or arc-shaped cross section.

7. The snap-action relay of claim 1, wherein The moving spring arm pin comprises a horizontal section inside the relay and a vertical section fitted into the fitting groove, and the lower end of the vertical section extends out of the lower end of the base; The lower side of the horizontal section is close to the base; A sunken glue storage groove is provided on the upper side of the base corresponding to the lower side of the horizontal section, and the glue storage groove and the fitting groove are in communication with each other.

8. The snap-action relay according to claim 7, characterized in that An extension is provided on the lower side of the horizontal section of the moving spring arm pin extending towards the glue storage groove.

9. The snap-action relay according to claim 8, characterized in that The extension and the glue storage groove are in clearance fit, and the clearance distance is greater than or equal to 0.1 mm.

10. The snap-action relay according to claim 1 or 2, characterized in that The vertical section of the moving spring arm pin is provided with a horizontally opened glue containing groove on the side facing the boss or the side away from the boss; the glue containing groove is partially located in the fitting groove, and the other part is located outside the lower side of the base.

11. The snap-action relay according to claim 1 or 2, characterized in that The moving spring arm pin is a single spring arm pin or a multi-laminated spring arm pin.

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