Electromagnetic relay with good sealing performance

Abstract

The utility model discloses an electromagnetic relay with good sealing performance, which comprises a base, a movable spring piece and a static spring piece, the movable spring piece and the static spring piece are respectively provided with a fixing part connected with a movable spring piece body and a static spring piece body, and each fixing part comprises a fixing section matched with a mounting groove of the base; a pin section which is in clearance fit with the reed pin hole of the base extends from one end, facing the reed pin hole, of the fixed section; the fixed section faces one end of a reed pin hole, and a first groove facing an opening of the reed pin hole is formed in an included angle between the fixed section and the pin section; the pin section is opposite to one end of the first groove, and the fixed section extends to form a boss which is abutted against the mounting groove; and the pin section is close to the joint of the pin section and the fixed section, and a glue guiding groove is formed between the boss and the mounting groove. According to the utility model, glue can rapidly flow to the periphery of the pin, the glue can be fully filled around the base, and the structure has the advantages of simple structure and good sealing performance.

Description

Technical Field

[0001] This utility model relates to relays, specifically an electromagnetic relay with good sealing performance. Background Technology

[0002] The electromagnetic relay includes a base, a housing, a magnetic circuit, a moving spring, and a stationary spring. The magnetic circuit includes a coil frame, a coil, an iron core, a yoke, and an armature. The moving spring includes the moving spring body and the moving contact thereon, and the stationary spring includes the stationary spring body and the stationary contact thereon. The moving and stationary contacts cooperate with each other. The coil frame includes two flanges and a winding section located between the two flanges. The coil is wound on the winding section, and both ends of the coil are electrically connected to two coil leads inserted into one of the flanges. The base has coil lead insertion holes, and the coil leads are inserted into the coil lead insertion holes and sealed with glue.

[0003] As times change and people become more safety conscious, many situations require protection against explosions, moisture, salt spray, insects, and other contaminants from entering and affecting the normal use of household appliances. Therefore, the sealing performance requirements for relays are becoming increasingly stringent.

[0004] The base has mounting slots and reed pin holes. The mounting slots include a moving reed mounting slot and a stationary reed mounting slot. The reed pin holes include a moving reed pin hole in the moving reed mounting slot and a stationary reed pin hole in the stationary reed mounting slot. The moving and stationary reed pins are inserted into the moving and stationary reed pin holes respectively, and are sealed with adhesive around them. Due to the high load conditions required for electromagnetic relays, both the moving and stationary reed pins are widened and thickened to meet temperature rise and current carrying capacity requirements. However, this widening and thickening design can prevent the adhesive from flowing sufficiently around the pins, resulting in poor sealing performance. Furthermore, under many special load conditions, relays with good sealing performance have significantly better electrical durability than unsealed or poorly sealed products. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an electromagnetic relay with a simple structure and good sealing performance that effectively improves the sealing performance at the pins.

[0006] The technical objective of this utility model is achieved through the following technical solution:

[0007] An electromagnetic relay with good sealing performance includes a base, a moving spring, and a stationary spring. The moving spring and the stationary spring each have a fixing part that connects to the moving spring body and the stationary spring body, respectively. The fixing part includes a fixing section that mates with a mounting groove in the base; a pin section that extends from the fixing section toward the spring pin hole and has a clearance fit with the spring pin hole in the base; a first groove that opens toward the spring pin hole is provided at the angle between the fixing section and the pin section at the end of the fixing section toward the spring pin hole; a boss that abuts against the mounting groove extends from the fixing section toward the pin section at the end opposite to the first groove; and an adhesive groove is formed between the pin section near the connection between the pin section and the fixing section, the boss, and the mounting groove.

[0008] Preferably, the opening of the first groove is larger than the gap between the pin segment and the spring pin hole.

[0009] Preferably, the surface of the pin segment near the fixed segment is provided with a second groove that connects the first groove and the adhesive groove.

[0010] Preferably, the opening width of the second groove is greater than the thickness of the mounting groove.

[0011] Preferably, the overall height of the boss is less than the height of the fixed section, and the distance from the end of the boss near the pin section to the pin section is greater than the distance from the end of the fixed section near the pin section to the pin section.

[0012] Preferably, two of the inner sidewalls of the spring pin hole are provided with protrusions, the protrusions are clearance-fitted with the pin segment, and adhesive grooves are formed on both sides of the protrusions.

[0013] Preferably, the protrusion is disposed on the inner sidewall along the length direction of the reed pin hole.

[0014] Preferably, the protrusion is an arc-shaped protrusion.

[0015] Preferably, the base has a coil lead insertion hole, and the inner four side walls of the coil lead insertion hole of the base are respectively provided with raised ribs that cooperate with the side of the coil lead, and the two sides of the raised ribs form adhesive grooves.

[0016] Preferably, the first groove is a right-angled trapezoid, with the side adjacent to the pin segment being a right-angled side and the side away from the pin segment being a hypotenuse.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The fixing part of this utility model includes a fixing section that mates with the mounting groove of the base; a pin section extending from the fixing section toward the spring pin hole that is clearance-fitted with the spring pin hole of the base; a first groove facing the opening of the spring pin hole is provided at the angle between the fixing section and the pin section at the end of the fixing section toward the spring pin hole; a boss extending from the fixing section away from the first groove at the end of the pin section that abuts against the mounting groove; and an adhesive inlet groove is formed between the pin section near the connection between the pin section and the fixing section, the boss, and the mounting groove. By providing the first groove, when the fixing part is fully installed into the mounting groove, during adhesive injection, adhesive can flow from between the pin section and the spring pin hole into the first groove, allowing the adhesive to flow quickly around the pin; by adding the boss, an adhesive inlet groove is formed between the pin section near the connection between the pin section and the fixing section, the boss, and the mounting groove; adhesive also flows from between the pin section and the spring pin hole into the adhesive inlet groove, thus providing sufficient flow space for the adhesive, allowing the adhesive to fill the area around the base more completely. This technical measure can effectively improve the sealing performance at the pins, thereby improving the overall sealing performance of the electromagnetic relay.

[0019] 2. The surface of the pin segment near the fixed segment of this utility model is provided with a second groove that connects the first groove and the adhesive inlet groove. This technology further increases the flow path of the adhesive, improving the flow of adhesive at the pin during the adhesive injection process, thereby enhancing the sealing performance at the spring pin.

[0020] 3. In this invention, two inner sidewalls of the reed pin hole are provided with protrusions facing each other, and adhesive inlet grooves are provided on both sides of the protrusions. By setting the protrusions and the adhesive inlet grooves formed on both sides of the protrusions, the pins are not completely fitted with the reed pin holes, increasing the space for adhesive to flow in and allowing the adhesive to flow fully around the reed pins, thereby improving the sealing performance at the reed pins.

[0021] 4. The base of this utility model has raised ribs on the middle of the four inner side walls of the coil lead insertion hole, which mate with the side of the coil lead. Adhesive grooves are formed on both sides of the raised ribs. The presence of raised ribs on the middle of the four inner side walls of the coil lead insertion hole prevents the coil lead from completely fitting into the coil lead hole, allowing adhesive to flow sufficiently around the coil lead, thereby improving the sealing performance at the coil lead. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 yes Figure 1 A top view of the base;

[0024] Figure 3 yes Figure 1 A schematic diagram of the fixing part;

[0025] Figure 4 yes Figure 1 Cross-sectional view of the stationary spring component;

[0026] Figure 5 yes Figure 2 A bottom view of the base;

[0027] Reference numerals: 1—base; 11—mounting slot; 111—moving spring mounting slot; 112—stationary spring mounting slot; 12—spring pin hole; 121—moving spring pin hole; 122—stationary spring pin hole; 13—coil lead insertion hole; 14—coil lead; 15—adhesive groove;

[0028] 2—Moving spring; 21—Moving spring body; 22—Moving contact;

[0029] 3—Stationary spring; 31—Stationary spring body; 32—Stationary contact;

[0030] 4—Fixing part; 41—Fixing section; 411—First groove; 412—Boss; 42—Pin section; 421—Second groove;

[0031] 5—Protrusion; 6—Glue-guiding groove; 7—Ribbon. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that in the description of this utility model, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] like Figure 1 — Figure 5 As shown, an electromagnetic relay with good sealing performance includes a base 1, a moving spring 2, and a stationary spring 3. The moving spring 2 and the stationary spring 3 each have a fixing part 4 connected to the moving spring body 21 and the stationary spring body 31, respectively. The fixing part 4 includes a fixing section 41 that mates with the mounting groove 11 of the base 1; a pin section 42 extending from the fixing section 41 toward the spring pin hole 12 and having a clearance fit with the spring pin hole 12 of the base 1; a first groove 411 opening toward the spring pin hole 12 is provided at the angle between the fixing section 41 and the pin section 42 at the end of the fixing section 41 toward the spring pin hole 12; a boss 412 extending from the fixing section 41 away from the first groove 411 and abutting against the mounting groove 11 is provided at the end of the pin section 42; an adhesive groove 15 is formed between the pin section 42 near the connection between the pin section 42 and the fixing section 41, the boss 412, and the mounting groove 11. By setting the first groove 411, when the fixing part 4 is fully installed into the mounting groove 11, during glue injection, the glue can flow from between the pin segment 42 and the spring pin hole 12 into the first groove 411, allowing the glue to flow quickly around the pin. By adding the boss 412, a glue-leading groove 15 is formed between the pin segment 42 near the connection between the pin segment 42 and the fixing part 41, the boss 412, and the mounting groove 11. The glue also flows from between the pin segment 42 and the spring pin hole 12 into the glue-leading groove 15, thus providing sufficient flow space for the glue and allowing it to fill the area around the base 1 more completely. This technical measure can effectively improve the sealing performance at the pin, thereby improving the overall sealing performance of the electromagnetic relay.

[0036] like Figure 1 , Figure 2As shown, the moving spring 2 has a moving contact 22 on its moving spring body 21, and the stationary spring 3 has a stationary contact 32 on its stationary spring body 31. In actual use, the connection between the fixing part 4 and the moving spring body 21 or the stationary spring body 31 can be riveting, integral molding, etc. For example, the fixing part 4 can be riveted to the moving spring body 21 to form the moving spring 2, and the fixing part 4 and the stationary spring body 31 can be integrally molded to form the stationary spring 3.

[0037] like Figure 2 As shown, the base 1 is provided with a mounting groove 11 and a spring pin hole 12. The mounting groove 11 includes a moving spring mounting groove 111 and a stationary spring mounting groove 112. The spring pin hole 12 includes a moving spring pin hole 121 provided in the moving spring mounting groove 111 and a stationary spring pin hole 122 provided in the stationary spring mounting groove 112. The moving spring pin and the stationary spring pin are respectively inserted into the moving spring pin hole 121 and the stationary spring pin hole 122, and glue is injected around the moving spring pin and the stationary spring pin for sealing.

[0038] like Figure 1 , Figure 3 , Figure 4 As shown, the fixing part 4 includes a fixing section 41 that mates with the mounting groove 11 of the base 1. The fixing section 41 extends towards the reed pin hole 12, with a pin section 42 that is clearance-fitted with the reed pin hole 12 of the base 1. In a specific implementation, the fixing section 41 is generally a square plate structure; the pin section 42 is a widened and thickened square strip structure. The lower end of the pin section 42 extends through the reed pin hole 12 to the outside of the base 1; the pin section 42 and the reed pin hole 12 are clearance-fitted. A first groove 411 opening towards the reed pin hole 12 is provided at the end of the fixing section 41 facing the reed pin hole 12 and at the angle between the fixing section 41 and the pin section 42. In this embodiment, the lower end of the fixing segment 41 facing the spring pin hole 12 is the fixing segment 41. When the fixing part 4 is installed in the mounting groove 11, the lower end of the fixing segment 41 abuts against the upper end of the mounting groove 11. By setting the first groove 411, a space larger than the gap between the pin segment 42 and the spring pin hole 12 is formed. When applying glue, the glue can flow quickly to the area around the pin, thereby improving the sealing effect at the spring pin hole 12.

[0039] like Figure 3 , Figure 4 As shown, the opening of the first groove 411 is larger than the gap between the pin segment 42 and the reed pin hole 12. This technical measure further increases the space of the first groove 411, thereby further improving the sealing effect at the reed pin hole 12.

[0040] In practical use, the first groove 411 can be U-shaped or the like; the side away from the pin segment 42 is provided with an arc-shaped chamfer. Specifically, the first groove 411 is a right trapezoid, with the side adjacent to the pin segment 42 being a right-angled side and the side away from the pin segment 42 being a beveled side.

[0041] like Figure 3 , Figure 4 As shown, at one end of the pin segment 42 opposite to the first groove 411, the fixed segment 41 extends out a boss 412 that abuts against the mounting groove 11; a glue-inducing groove 15 is formed between the pin segment 42 near the connection between the pin segment 42 and the fixed segment 41, the boss 412, and the mounting groove 11. In this embodiment, when the pin segment 42 is located on the lower right side of the fixed segment 41, the right side of the pin segment 42 is flush with the right side of the fixed segment 41. The first groove 411 is located on the left end of the pin segment 42, and at one end of the pin segment 42 opposite to the first groove 411 is the right end of the pin segment 42. The fixed segment 41 extends to the right, extending out a boss 412 that abuts against the inner wall of the right side of the mounting groove 11. In actual use, when the pin segment 42 is located on the lower left side of the fixed segment 41, the left side of the pin segment 42 is flush with the left side of the fixed segment 41. The first groove 411 is located at the right end of the pin segment 42. The end of the pin segment 42 opposite to the first groove 411 is the left end of the pin segment 42. The fixing segment 41 extends to the left, forming a boss 412 that abuts against the inner left wall of the mounting groove 11. By adding an adhesive channel 15 formed between the pin segment 42 and the fixing segment 41, the boss 412, and the mounting groove 11, sufficient flow space is provided for the adhesive, allowing it to fill the area around the base 1 more completely. This technique effectively improves the sealing performance at the reed pin, thereby improving the overall sealing performance of the electromagnetic relay.

[0042] like Figure 3 , Figure 4 As shown, the overall height of the boss 412 is less than the height of the fixed section 41, and the distance from the end of the boss 412 near the pin section 42 to the pin section 42 is greater than the distance from the end of the fixed section 41 near the pin section 42 to the pin section 42. In this embodiment, the end of the boss 412 near the pin section 42 is the lower end of the boss 412; the distance from the lower end of the boss 412 to the pin section 42 is greater than the distance from the lower end of the fixed section 41 to the pin section 42. This technical measure increases the depth of the adhesive inlet groove 15, further improving the flow space of the adhesive, allowing the adhesive to fill the area around the base 1 more completely.

[0043] like Figure 3 , Figure 4As shown, the surface of the pin segment 42 near the fixed segment 41 is provided with a second groove 421 that connects the first groove 411 and the adhesive inlet groove 15. In a specific implementation, the two ends of the second groove 421 correspond to the first groove 411 and the boss 412, respectively. When the fixed part 4 is installed in the mounting groove 11, the second groove 421 can connect the first groove 411 and the adhesive inlet groove 15. There are two second grooves 421, which are arranged on opposite sides of the pin segment 42. In this embodiment, the second grooves 421 are symmetrically arranged on the front and rear sides of the pin segment 42. The second grooves 421 are C-shaped grooves, U-shaped grooves, etc. This technology further increases the flow path of the adhesive, and can improve the flow of adhesive at the pin during the adhesive injection process, thereby improving the sealing performance at the pin.

[0044] like Figure 4 As shown, the opening width of the second groove 421 is greater than the thickness of the mounting groove 11. In a specific implementation, the upper side of the second groove 421 is flush with the upper side of the spring pin hole 12; the lower side of the second groove 421 is lower than the lower side of the spring pin hole 12. This technical measure further improves the flow of adhesive, thereby improving the sealing performance at the pin.

[0045] like Figure 2 , Figure 5 As shown, two protrusions 5 are provided opposite each other on the inner sidewalls of the reed pin hole 12, and adhesive-attracting grooves 6 are provided on both sides of the protrusions 5. In a specific implementation, protrusions 5 are provided opposite each other on the inner sidewalls along the length direction of the reed pin hole 12, and adhesive-attracting grooves 6 are formed on both sides of the protrusions 5. The protrusions 5 can be arc-shaped, square, trapezoidal, or triangular.

[0046] In this embodiment, the protrusion 5 is an arc-shaped protrusion 5. By setting the protrusion 5 and forming adhesive inlet grooves 6 on both sides of the protrusion 5, the pin will not completely fit with the spring pin hole 12, increasing the space for adhesive to flow in, so that the adhesive can flow fully to the periphery of the spring pin, thereby improving the sealing performance at the spring pin.

[0047] like Figure 2 , Figure 5 As shown, the inner four side walls of the coil lead insertion hole 13 of the base 1 are respectively provided with raised ribs 7 that mate with the side of the coil lead 14, and adhesive grooves 6 are formed on both sides of the raised ribs 7. In a specific implementation, the cross-section of the coil lead 14 is square, and the coil lead insertion hole 13 is a square hole with a diameter larger than that of the coil lead 14. The raised ribs 7 can be arc-shaped, square, trapezoidal, or triangular. In this embodiment, the raised ribs 7 are arc-shaped. The raised ribs 7 that mate with the side of the coil lead 14 are respectively provided in the inner four side walls of the coil lead insertion hole 13, so that the coil lead 14 will not be completely fitted with the hole of the coil lead 14, thereby allowing the adhesive to flow fully to the periphery of the coil lead 14, thereby improving the sealing performance at the coil lead 14.

[0048] 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. An electromagnetic relay with improved sealing, comprising a base, a moving spring member and a stationary spring member, said moving spring member and stationary spring member each having a fixed portion connected to a moving spring member body and a stationary spring member body, respectively, characterized in that, The fixing part comprises a fixing section matched with the mounting groove of the base; The fixing section extends a pin section matched with the gap between the base and the reed pin hole at one end of the reed pin hole; The fixing section is provided with a first groove opening towards the reed pin hole at the corner between the fixing section and the pin section at one end of the reed pin hole; The pin section is provided with a boss abutting against the mounting groove at the end opposite to the first groove; The pin section is provided with a glue introduction groove between the connection between the pin section and the fixing section, the boss and the mounting groove.

2. The electromagnetic relay with good sealing according to claim 1, characterized in that, The opening of the first groove is larger than the gap between the pin section and the reed pin hole.

3. The electromagnetic relay with improved sealing according to claim 1, characterized in that, The surface of the pin section close to the end of the fixing section is provided with a second groove connected with the first groove and the glue introduction groove.

4. The electromagnetic relay with a good seal according to claim 3, characterized by, The opening width of the second groove is larger than the thickness of the mounting groove.

5. The electromagnetic relay with improved sealing according to claim 1, wherein The overall height of the boss is smaller than the height of the fixing section, and the distance from the end of the boss close to the pin section to the pin section is larger than the distance from the end of the fixing section close to the pin section to the pin section.

6. The electromagnetic relay with improved sealing according to claim 1, wherein Two inner side walls of the reed pin hole are oppositely provided with protrusions matched with the gap between the pin section, and glue introduction grooves are formed on the two sides of the protrusions.

7. The electromagnetic relay with improved sealing according to claim 6, wherein The protrusions are arranged on the inner side walls in the length direction of the reed pin hole.

8. The electromagnetic relay with good sealing according to claim 7 or 6, characterized by, The protrusions are arc-shaped protrusions.

9. The electromagnetic relay with improved sealing according to claim 1, wherein The base is provided with a coil lead-out pin insertion hole, and four inner side walls of the coil lead-out pin insertion hole of the base are respectively provided with convex ribs matched with the side surface of the coil lead-out pin, and glue introduction grooves are formed on the two sides of the convex ribs.

10. The electromagnetic relay with improved sealing according to claim 1, characterized in that, The first groove is a right-angled trapezoid, and the side close to the pin section is a right-angled side, and the side away from the pin section is an oblique side.

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