CN219180428U - Relay - Google Patents

Abstract

The utility model provides a relay which comprises a shell, a relay part and a bottom plate, wherein the shell is provided with a containing cavity and an opening communicated with the containing cavity, the relay part is assembled in the containing cavity of the shell, a containing groove is formed in the periphery of the opening of the shell, the bottom plate comprises a panel and a connecting side wall arranged on the outer edge of the panel, the panel abuts against the relay part and covers the opening of the shell, and the connecting side wall is inserted in the containing groove and is filled and bonded and fixed through sealant. The bonding area of the glue between the bottom plate and the shell is greatly increased, the bonding force between the bottom plate and the shell is improved, and the bottom plate and the shell cannot bulge or leak due to thermal expansion caused by reflow soldering at high temperature.

Description

Relay

Technical Field

The utility model relates to a relay, in particular to a relay which is free from leakage and bulge after reflow soldering.

Background

In the conventional relay, referring to fig. 1 and 2, a relay core 2 is installed in a receiving cavity of a housing 1, a planar bottom plate 3 is covered on an opening of the housing 1 and is fixed by glue, and then plastic packaging is performed. In the use, after reflow soldering, the relay can all appear shell 1 and bulge, even appear revealing the risk of inefficacy between shell 1 and the bottom plate 3. With the improvement of customer requirements, the relay is required to be free from leakage and bulge after reflow soldering.

In order to improve the product after reflow soldering, the housing does not bulge or risk leakage. Typical products, such as military products, employ a metal housing and base plate welded to meet this requirement. The process has great difficulty, high price of parts and high cost of products, is only suitable for military products and aerospace-level relays, and is not suitable for common civil-level relays. Therefore, the relay needs to be redesigned to achieve the effects of no leakage of the housing, no bulging and low cost.

Disclosure of Invention

To solve the above problems, the present utility model provides a relay.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a relay, includes shell, relay core and bottom plate, the shell has the opening that holds the chamber and the intercommunication holds the chamber, relay core assembles in the holding intracavity of shell, the opening periphery of shell still is formed with the holding tank, the bottom plate includes the panel and sets up at the connection lateral wall of panel outer edge, the panel supports the relay core and covers the opening of shell, the connection lateral wall inserts and locates in the holding tank and fill and bond fixedly through the sealant.

Further, the outer side groove wall surface, the groove bottom surface and/or the inner side groove wall surface of the accommodating groove are/is a concave-convex surface. And/or the outer side wall surface, the end surface and/or the inner side wall surface of the connecting side wall are concave-convex surfaces.

Further, the sealant is filled between the outer side wall surface of the accommodating groove and the outer wall surface of the connecting side wall, between the groove bottom surface of the accommodating groove and the end surface of the connecting side wall, and between the inner side wall surface of the accommodating groove and the inner wall surface of the connecting side wall.

Further, the bottom butt of relay core is in the bottom of the holding chamber of shell, the cooperation position of the movable spring part of relay core and quiet spring part is close to the opening of shell, and the relay still includes the injecting glue passageway, injecting glue passageway intercommunication holding tank and holding chamber.

Further, the relay core includes coil assembly, iron core, yoke, moves spring part and quiet spring part, coil assembly includes coil former and coil, the coil former has the upper flange that is close to the opening of shell, the butt to hold the lower flange of the bottom in chamber and be located the spool between upper flange and the lower flange, the bottom plate butt is on the upper flange, the inner wall installation in holding the chamber is hugged closely all around to the upper flange, and the coil is twined on the spool, and the coil is the interval setting with the inner wall in holding the chamber to form and dodges the space, and the iron core wears to locate in the coil former, and quiet spring part inserts the upper flange of locating the coil former, move the spring part and rivet on the yoke that is located the lateral part of coil former through the riveting nail to extend to the upper flange of coil former and quiet spring part cooperation.

Further, the glue injection channel is a shell glue overflow opening formed in the inner side groove wall of the accommodating groove, and the shell glue overflow opening directly corresponds to and is communicated with a gap between the coil assembly and the shell.

Further, the glue injection channel comprises a coil frame glue overflow opening arranged on a coil frame of the relay core and a shell glue overflow opening arranged on an inner side groove wall of the containing groove and communicated with the coil frame glue overflow opening, wherein the coil frame glue overflow opening is arranged on an upper flange of the coil frame and is deviated from the movable spring part and the static spring part, and the coil frame glue overflow opening is communicated with a gap between the coil assembly and the shell.

Further, the shell or the bottom plate is also provided with an exhaust port which penetrates through the accommodating cavity and the external environment.

Further, the exhaust port is arranged on the shell, and the height of the exhaust port is lower than that of a riveting nail for fixing the movable spring part and the yoke.

Further, the outer groove wall of the accommodating groove is higher than the inner groove wall.

Furthermore, the accommodating cavity and the opening of the shell are equal in size, and the accommodating groove is formed by integrally extending the shell outwards along the periphery of the opening.

Further, the bottom plate is of an integral connection structure.

The technical scheme provided by the utility model has the following beneficial effects:

1. the shape lateral wall of bottom plate inserts in the holding tank of shell and packs and bond fixedly through the sealant, very big increase the glue bonding area between bottom plate and the shell, improve the cohesion of bottom plate and shell, bottom plate and shell can not appear thermal expansion and bulge because of the reflow soldering under high temperature, even reveal (i.e. do not bulge, leak). The purpose is achieved without adopting a shell made of metal and a bottom plate for welding, the assembly process is simple, and the cost is low; the relay is suitable for common civil level relays.

2. The outer side wall surface, the groove bottom surface and/or the inner side wall surface of the accommodating groove are/is a concave-convex surface, and/or the outer side wall surface, the end surface and/or the inner side wall surface of the connecting side wall are/is a concave-convex surface; the bonding area of the glue between the bottom plate and the shell is further increased, and the bonding force between the bottom plate and the shell is stronger.

3. Set up the injecting glue passageway that communicates holding tank and holding chamber, can pour into the holding intracavity of shell with glue, after the glue solidification, strengthen relay shell's intensity, further reduce the risk of shell swell even gas leakage.

4. The glue injection channel comprises a shell glue overflow opening which is formed in the inner side groove wall of the accommodating groove; glue injection of holding tank and holding chamber can be accomplished through once injecting glue operation, and just spill over to holding chamber in the clearance of filling between holding tank and connection lateral wall at first, stable in structure is difficult for makeing mistakes.

5. The shell is also provided with an exhaust port which penetrates into the accommodating cavity, and the height of the exhaust port is lower than that of a riveting nail for fixing the movable spring part and the yoke iron; the air in the accommodating cavity can be smoothly discharged from the air outlet, so that the possibility of expansion is reduced, and meanwhile, the influence on the operation of the relay core caused by the fact that glue is connected with the elastic section of the trigger spring part is avoided.

Drawings

FIG. 1 is a schematic diagram of the appearance of a prior art relay;

fig. 2 is a schematic structural view of a prior art relay after concealing a housing;

FIG. 3 is a schematic view showing the appearance of a relay according to an embodiment;

fig. 4 is a schematic structural diagram of the relay according to the embodiment after the relay is concealed in the housing;

FIG. 5 is an exploded view of the relay according to the embodiment;

FIG. 6 is a schematic diagram of a relay movement according to an embodiment;

FIG. 7 is a top view of an embodiment relay;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;

FIG. 9 is a schematic perspective view of the housing in an embodiment;

FIG. 10 shows a top view of the housing in an embodiment;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 12 is a schematic view showing the structure of the base plate in the embodiment;

fig. 13 shows a cross-sectional view of the base plate in an embodiment.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 3 to 13, the present embodiment provides a relay, including a housing 10, a relay core 20 and a bottom plate 30, where the housing 10 has a receiving cavity 101 and an opening 102 communicating with the receiving cavity 101, the relay core 20 refers to a portion capable of implementing a relay function, the relay core 20 is assembled in the receiving cavity 101 of the housing 10, a receiving groove 11 is further formed on the periphery of the opening 102 of the housing 10, specifically, the housing 10 is a square housing, and the receiving groove 11 is a square closed groove body; specifically, the two side walls of the accommodating groove 11 are an outer side wall 12 and an inner side wall 13. The bottom plate 30 comprises a panel 31 and a connecting side wall 32 arranged at the outer edge of the panel 31, in particular, the panel 31 is a planar plate, the panel 31 props against the relay core 20 and covers the opening 102 of the shell 10, and the connecting side wall 32 is a closed structure formed by surrounding four side walls; the connecting side wall 32 is inserted into the accommodating groove 11 and is filled with sealing glue and adhered and fixed.

That is, during assembly, the relay movement 20 is first installed into the accommodating cavity 101 of the housing 10, then the bottom plate 30 is covered, glue is applied to the accommodating groove 11, the glue is filled between the outer groove wall surface 121 (i.e., the wall surface of the outer groove wall 12) of the accommodating groove 11 and the outer wall surface 321 of the connecting side wall 32, between the groove bottom surface 111 of the accommodating groove 11 and the end surface 323 of the connecting side wall 32, and between the inner groove wall surface 131 (i.e., the wall surface of the inner groove wall 13) of the accommodating groove 11 and the inner wall surface 322 of the connecting side wall 32, and after the glue is solidified, a sealant is formed, and the connecting side wall 32 is adhered and fixed in the accommodating groove 11.

Thus, the bonding area of the glue between the bottom plate 30 and the shell 10 is greatly increased, the bonding force between the bottom plate 30 and the shell 10 is improved, and the bottom plate 30 and the shell 10 cannot bulge or leak due to thermal expansion caused by reflow soldering at high temperature. And need not to adopt the shell of metal material and bottom plate to weld to achieve the goal, as in this particular embodiment, shell 10 and bottom plate 30 all adopt the plastic material, the assembly process is simple, with low costs; the relay is suitable for common civil level relays.

Further preferably, in this embodiment, the outer side groove wall surface 121 and the inner side groove wall surface 131 of the accommodating groove 11 are concave-convex surfaces (such as the reference numeral 200 in fig. 10), and the outer side wall surface 321 and the inner side wall surface 322 of the connecting side wall 32 are concave-convex surfaces, so that the bonding area of the glue (i.e. sealant) between the bottom plate 30 and the housing 10 is further increased, the bonding force between the bottom plate 30 and the housing 10 is stronger, and more firm, i.e. the bottom plate 30 and the housing 10 are less likely to bulge or leak due to thermal expansion caused by reflow soldering at high temperature.

Specifically, in this embodiment, the concave-convex surface is a corrugated surface; the corrugated surface is formed by a plurality of arc-shaped convex ribs which are arranged in a side-by-side protruding mode, the part provided with the arc-shaped convex ribs is a convex part, the part not provided with the arc-shaped convex ribs is a concave part, and then a concave-convex structure is formed, so that the contact area between the corrugated surface and sealant can be well increased, and the bonding is firmer. More specifically, the extending direction of the arc-shaped ribs is vertical, namely, is perpendicular to the bottom surface 111 of the accommodating groove 11, and is better formed by machining.

While the above-described design of the contact surface between the accommodating groove 11 and the connecting sidewall 32 is one of the preferred embodiments, of course, in other embodiments, the surface or surfaces of the outer sidewall 121, the groove bottom 111, and the inner sidewall 131 of the accommodating groove 11, and the outer sidewall 321, the end 323, and the inner sidewall 322 of the connecting sidewall 32 may be designed as a corrugated surface with concave-convex relief, for example, the outer sidewall 121, the groove bottom 111, and the inner sidewall 131 of the accommodating groove 11 are all designed as corrugated surfaces with concave-convex relief, instead of the connecting sidewall 32 being designed as corrugated surfaces; or the groove bottom surface 111 of the accommodation groove 11 and the end face 323 of the connecting side wall 32 are designed as a corrugated surface with a concave-convex relief, etc. The corrugated surface may also take the form of side-by-side serrated ribs or the like.

The bottom of the relay movement 20 is abutted to the bottom of the accommodating cavity 101 of the shell 10, and the shell 10 and the bottom plate 30 are fixed through sealant to fix the relay movement 20; the matching position of the movable spring part and the static spring part of the relay core 20 is close to the opening 102 of the casing 10, and the relay further comprises a glue injection channel 100, wherein the glue injection channel 100 is communicated with the accommodating groove 11 and the accommodating cavity 101. So set up, in the cavity 101 holds that accessible injecting glue passageway 100 injected shell 10, strengthen the intensity of shell 10, further avoid the shell to bulge, simultaneously, glue gets into and holds the intracavity, with the heat of relay core through the contact conduction to the shell, be favorable to heat dissipation, reduction temperature rise.

Specifically, the relay movement 20 includes a coil assembly, an iron core 23, a yoke 24, a movable spring portion 25 and a static spring portion 26, the coil assembly includes a coil former 21 and a coil 22, the coil former 21 has an upper flange 212 close to the opening 102 of the housing 10, a lower flange abutting to the bottom of the accommodating chamber 101 and a spool located between the upper flange 212 and the lower flange, the lower flange abuts as the bottom of the relay movement 20 at the bottom of the accommodating chamber 101, the bottom plate 30 abuts on the upper flange 212, and further the relay movement 20 is fixed, and the periphery of the upper flange 212 is mounted tightly against the inner wall of the accommodating chamber 101. The coil 22 is wound around the bobbin 21, and the core 23 is inserted into the bobbin 21. The stationary spring part 26 is inserted into the upper flange 212 of the bobbin 21, and the movable spring part 25 is riveted to the yoke 24 at the side of the bobbin 21 by rivet 241 and extends to the upper flange 212 of the bobbin 21 to be engaged with the stationary spring part 26. Specifically, the glue injection channel 100 includes a coil frame glue overflow port 211 formed on the coil frame 21 of the relay core 20, and a housing glue overflow port 14 formed on the inner side slot wall 13 of the accommodating slot 11 and communicated with the coil frame glue overflow port 211, wherein the coil frame glue overflow port 211 is communicated with a gap between the coil assembly and the housing 10. So set up, when injecting glue into holding tank 11, glue guarantees at first to fill in the clearance between holding tank 11 and connecting lateral wall 32, later overflows through shell glue overflow mouth 14, and the glue that overflows gets into the clearance between coil assembly and the shell 10 through coil former glue overflow mouth 211, and then fills holding chamber 101, and the glue injection of holding tank 11 and holding chamber 101 just can be accomplished to the operation. Meanwhile, the coil bobbin glue overflow 211 is provided at the upper flange 212 of the coil bobbin 21 and is away from the moving spring portion 25 and the stationary spring portion 26. Preventing glue from flowing into the receiving cavity 101 and onto the moving spring portion 25 or the static spring portion 26 to affect the action of the contacts.

Of course, in other embodiments, when the height of the upper flange 212 is higher than the bottommost portion of the housing glue overflow 14, i.e. when the housing glue overflow 14 has a gap for directly connecting the coil assembly and the housing 10, the coil former glue overflow 211 may not be provided, and the glue injection channel 100 is the housing glue overflow 14 formed on the inner wall 13 of the receiving groove 11, and the housing glue overflow 14 directly connects the gap between the coil assembly and the housing 10.

More specifically, the housing 10 is further provided with an air outlet 103 penetrating the accommodating cavity 101 and the outside (i.e., the external environment) of the housing 10. So set up, when glue gets into the holding chamber 101 of shell 10 through coil former glue overflow mouth 211, hold the air in the chamber 101 and can follow gas vent 103 and discharge smoothly, reduce the inside air of relay, and then reduce the risk of swell even gas leakage. And after dispensing or filling, the exhaust port 103 is sealed, so that plastic packaging is realized.

In order to avoid the glue affecting the action of the relay movement 20, such as the opening and closing action of the contacts, in this embodiment, the position of the air outlet 103 is limited, and preferably, the height of the air outlet 103 is lower than the rivet 241 for fixing the movable spring portion 25 and the yoke 24. When the glue water flows to the height of the air outlet 103, the glue water flows out of the air outlet 103 and cannot rise continuously, so that the action of the movable spring part is prevented from being influenced by the fact that the glue water is connected with the elastic section of the movable spring part.

Specifically, the openings at both ends of the exhaust port 103 and the shape of the exhaust port 103 may be offset from each other as needed.

The design of adding the glue injection channel 100 is one of the preferred solutions in the relay. Of course, in other embodiments, the height of the air outlet 103 may not be limited, and the amount of glue may be limited, for example, by manually controlling the amount of glue, so that excessive glue may be well prevented from contacting the contacts. Or the bottom plate 30 is provided with the air outlet 103 which is communicated with the accommodating cavity 101 and the external environment, and when the air outlet 103 is arranged on the bottom plate 30, the contact caused by excessive glue is avoided by manually controlling the glue amount. Alternatively, the glue injection channel 100 may be disposed in other manners, such as directly disposed on the housing 10, and if the glue injection channel 100 is capable of exhausting, the structure of the exhaust port 103 may not be separately disposed; these alternative means also enable the injection of glue into the housing cavity 101 of the casing 10, but may be inferior in terms of the way of operation or the effect presented compared to the solution of the present embodiment.

Specifically, in this embodiment, the outer side groove wall 12 of the accommodating groove 11 is higher than the inner side groove wall 13, so that when the bottom plate 30 is covered, the outer side groove wall 12 of the accommodating groove 11 can also cover the outer side of the bottom plate 30, so that the appearance is tidier and more attractive; meanwhile, due to the blocking of the outer groove wall 30 of the accommodating groove 11, the glue can be filled on the surface of the bottom plate 10, so that the bonding strength is better.

Specifically, the accommodating chamber 101 and the opening 102 of the housing 10 are equal in size, and do not interfere with the mounting operation of the relay movement 20. The accommodating groove 11 is formed by integrally extending the shell 10 outwards along the periphery of the opening, so as to prepare the accommodating groove 11. More specifically, the housing 10 is an integral connection structure formed by integral injection molding through an injection mold, so that the manufacturing is simpler and the cost is lower. Similarly, the bottom plate 30 is an integral connection structure, and is also integrally injection molded by an injection mold.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (11)

1. The utility model provides a relay, includes shell, relay core and bottom plate, the shell has the opening that holds chamber and intercommunication holding the chamber, relay core assembles in the holding intracavity of shell, its characterized in that: the opening periphery of the shell is also provided with a containing groove, the bottom plate comprises a panel and a connecting side wall arranged on the outer edge of the panel, the panel props against the relay core and covers the opening of the shell, and the connecting side wall is inserted into the containing groove and is filled and bonded and fixed through sealant.

2. The relay of claim 1, wherein: the outer side groove wall surface, the groove bottom surface and/or the inner side groove wall surface of the accommodating groove are concave-convex surfaces; and/or the outer side wall surface, the end surface and/or the inner side wall surface of the connecting side wall are concave-convex surfaces.

3. Relay according to claim 1 or 2, characterized in that: the sealant is filled between the outer side wall surface of the accommodating groove and the outer wall surface of the connecting side wall, between the groove bottom surface of the accommodating groove and the end surface of the connecting side wall, and between the inner side wall surface of the accommodating groove and the inner wall surface of the connecting side wall.

4. The relay of claim 1, wherein: the bottom butt of relay core is in the bottom of the holding chamber of shell, the cooperation position of the movable spring part of relay core and quiet spring part is close to the opening of shell, and the relay still includes the injecting glue passageway, injecting glue passageway intercommunication holding tank and holding chamber.

5. The relay of claim 4, wherein: the relay core comprises a coil assembly, an iron core, a yoke, a movable spring part and a static spring part, wherein the coil assembly comprises a coil frame and a coil, the coil frame is provided with an upper flange close to an opening of a shell, a lower flange which is abutted to the bottom of a containing cavity and a winding shaft which is positioned between the upper flange and the lower flange, the bottom plate is abutted to the upper flange, the periphery of the upper flange is tightly attached to the inner wall of the containing cavity, the coil is wound on the winding shaft, the iron core is arranged in the coil frame in a penetrating mode, the static spring part is inserted into the upper flange of the coil frame, and the movable spring part is riveted on the yoke positioned at the side portion of the coil frame through riveting nails and extends to the upper flange of the coil frame to be matched with the static spring part.

6. The relay of claim 5, wherein: the glue injection channel is a shell glue overflow opening formed in the inner side groove wall of the accommodating groove, and the shell glue overflow opening directly corresponds to and is communicated with a gap between the coil assembly and the shell.

7. The relay of claim 5, wherein: the glue injection channel comprises a coil frame glue overflow opening formed in a coil frame of the relay core and a shell glue overflow opening formed in an inner side groove wall of the accommodating groove and communicated with the coil frame glue overflow opening, wherein the coil frame glue overflow opening is formed in an upper flange of the coil frame and deviates from the movable spring part and the static spring part, and the coil frame glue overflow opening is communicated with a gap between the coil assembly and the shell.

8. The relay of claim 5, wherein: and the shell or the bottom plate is also provided with an exhaust port which penetrates through the accommodating cavity and the external environment.

9. The relay of claim 8, wherein: the exhaust port is arranged on the shell, and the height of the exhaust port is lower than that of a riveting nail for fixing the movable spring part and the yoke.

10. The relay of claim 1, wherein: the accommodating groove is provided with two side groove walls, namely an outer side groove wall and an inner side groove wall; the outer side groove wall of the accommodating groove is higher than the inner side groove wall.

11. The relay of claim 1, wherein: the accommodating cavity and the opening of the shell are equal in size, the accommodating groove is formed by integrally extending the shell outwards along the periphery of the opening, and/or the bottom plate is of an integral connecting structure.

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