CN214753567U - Air hole structure of electromagnetic relay shell - Google Patents

Abstract

The utility model discloses an electromagnetic relay shell air vent structure, which comprises a relay shell, wherein the outer side surface of the relay shell is provided with an inner concave cavity in an inner concave structure, and an air vent base hole which can communicate the internal environment and the external environment of the shell is arranged in the inner concave cavity; the relay shell is characterized in that a cover plate capable of shielding the outer end part of the ventilation base hole is assembled in the concave cavity of the relay shell, a hollow interlayer capable of communicating the ventilation base hole is formed in the concave cavity of the cover plate, a ventilation auxiliary hole capable of communicating the hollow interlayer with the external environment is formed in the cover plate, and ventilation holes which are of a non-straight structure and are formed in the relay shell through the ventilation base hole, the hollow interlayer and the ventilation auxiliary hole which are communicated in sequence are matched with the cover plate. The utility model discloses a bleeder vent structure can enough prevent effectively that the pollutant from invading inside the relay casing, need not to obviously change the shaping structure (including the outward appearance structure) of relay casing again, is favorable to marketing.

Description

Air hole structure of electromagnetic relay shell

Technical Field

The utility model relates to a component part-casing of electromagnetic relay specifically is a bleeder vent structure on the electromagnetic relay casing.

Background

In order to reliably ventilate and dissipate heat of the internal environment of the electromagnetic relay shell in the application working condition, the electromagnetic relayThe outer surface of the device shell is provided with an inner concave cavity in an inner concave structure, and air holes capable of communicating the inner environment and the outer environment of the shell are formed in the inner concave cavity, so that the most common is the solder mask type relay applied to a high-temperature working condition environment, and the relay shell structure shown in figure 1 (in the figure, 1 is a relay shell, 11 is an inner concave cavity, and 12 is a relay shell^，Which is a vent hole formed in the concave cavity 11).

The aperture of the vent formed on the relay shell is about 1mm because the relay has small structure and volume and strict technical requirements on electrical performance, which is most directly shown on a small or subminiature solder mask type relay used for household electrical equipment. Such fine air vents are typically formed in the relay case in a straight hole configuration as cast.

However, due to the existence of the straight hole structure air vent and the non-shielding structure on the relay housing, during the PCB board forming process and the subsequent application process, especially during the PCB board forming process, various contaminants (for example, three-proofing paint in the PCB board forming process, such as dust in the subsequent application process, etc.) may have technical problems of intruding into the relay housing through the straight hole structure air vent and/or blocking the outer end portion of the straight hole structure air vent, and these technical problems directly affect the electrical performance of the relay.

At present, in order to effectively prevent pollutants from invading into the interior of a relay shell through a straight hole structure air vent in the industry, it is a common practice to change an air vent forming structure on the relay shell, and directly design the air vent formed on the relay shell into a non-straight hole structure, that is, directly design an air vent air passage on the relay shell into a bent structure, for example, "an electromagnetic relay with an air permeable shell" disclosed in chinese patent literature (publication No. CN 104576210, published 2015, 04-29). Although the technical problem that pollutants invade the inside of the relay shell through the air holes is solved, the technical problem is effective relatively, the change of the air hole forming structure on the relay shell needs to spend high cost to redesign the forming die of the relay shell, and the change of the air hole forming structure on the relay shell inevitably changes the whole structure of the relay shell, especially the appearance structure, so that the mature relay product line originally using the relay shell can not be continuously used, the mature relay product line can be changed or a new relay product line needs to be designed (such as the change of client equipment and the like) in an inevitable manner, the cost is too high, the market is difficult to accept, and the popularization is not facilitated.

The applicant develops a vent hole structure in the early period, which can effectively solve the technical problem that pollutants enter the interior of the relay shell through the vent hole without obviously changing the forming structure of the relay shell, and the specific details are the 'vent hole structure on the relay shell' (publication No. CN 112271108, published 2021, 26.01.1) technology disclosed in Chinese patent literature. However, the plug structure adopted by the technology is complex and fine, the technical requirements for the forming structure of the plug and the assembly precision between the plug and the air hole are high, and the manufacturing cost of the whole relay is high.

SUMMERY OF THE UTILITY MODEL

The technical purpose of the utility model is that: aiming at the particularity of the air holes on the relay shell and the defects of the prior art, the air hole structure is provided, which can effectively solve the technical problem that pollutants enter the inside of the relay shell through the air holes with a simple structure and low cost without obviously changing the forming structure of the relay shell.

The technical purpose of the utility model is realized through the following technical scheme: an air hole structure of an electromagnetic relay shell comprises a relay shell, wherein an inner concave cavity is formed in the outer side surface of the relay shell in an inner concave structure, and an air-permeable base hole capable of communicating the inner environment and the outer environment of the shell is formed in the inner concave cavity; the relay shell is characterized in that a cover plate capable of shielding the outer end part of the ventilation base hole is assembled in the concave cavity of the relay shell, the cover plate is arranged in the concave cavity and forms a hollow interlayer capable of being communicated with the ventilation base hole, a ventilation auxiliary hole capable of being communicated with the hollow interlayer and the external environment is formed in the cover plate, and the ventilation hole with a non-straight-path structure is formed in the relay shell by the aid of the ventilation base hole, the hollow interlayer and the ventilation auxiliary hole which are communicated in sequence. This technical measure does not make the change to ventilative base hole structure itself on the relay casing, but assembles a apron that neither obviously changes relay shell structure, can effectively shelter from the outer tip of ventilative base hole again in the concave cavity of the ventilative base hole of shaping, and this apron cooperation relay casing makes the air flue of the fashioned bleeder vent on the relay casing with the shaping of non-straight way structure, so, brings two following main technical advantages:

firstly, the cover plate forms enclosure type shielding protection on the outer end part of a ventilation base hole which is formed on the relay shell and used for forming the ventilation hole, pollutants can be effectively prevented from directly invading the interior of the relay shell through the ventilation base hole under the enclosure of the cover plate, and the technical effect of preventing a relay body assembled in the relay shell from being polluted is prominent;

secondly, need not the forming structure (including the outward appearance structure) of obvious change relay casing, especially can not change the ventilative basic hole structure on the relay casing, its forming structure is simple, convenient, with low costs, and the mature relay product line that originally uses this type relay casing can continue to use, can not relate to the change of this type of mature relay product line because of the input of this relay casing basically, is favorable to marketing.

As one preferable scheme, the ventilation base hole on the relay shell is of a straight hole structure; the technical measure ensures that the ventilating base hole on the relay shell is formed in the simplest and conventional straight hole structure, the forming is efficient and convenient, the yield is high, the cost is low, and the ventilating base hole structure on the relay shell cannot be changed. The auxiliary ventilation hole on the cover plate is formed in the side part of the cover plate, the cover plate is arranged in an assembly structure on the relay shell, and the auxiliary ventilation hole on the cover plate is matched with the basic ventilation hole on the relay shell in a staggered structure; the technical effect of the technical measure is two:

firstly, based on the technical effect of the cover plate on the enclosure protection of the outer end part of the ventilation base hole on the relay shell, the ventilation auxiliary hole formed at the side part of the cover plate enables the outer end part of the air passage structure of the whole ventilation hole to be radially arranged and formed relative to the ventilation base hole, so that the ventilation auxiliary hole is not easy to block, and is not easy to block even when three-proofing paint is sprayed in the PCB forming process;

and secondly, the ventilation auxiliary hole on the cover plate is communicated with the ventilation base hole on the relay shell in a non-right matching manner, but in a dislocation matching manner, so that the air passage of the whole ventilation hole is formed in a zigzag structure, and the technical effect of preventing pollutants, particularly pollutants carried by gas from invading the interior of the relay shell is excellent.

As one preferable scheme, the outer end part of the ventilation base hole is provided with a hole side boss protruding upwards in the concave cavity, the top surface of the hole side boss is matched with the bottom surface of the concave cavity in a step structure, and part/all of the top surface of the hole side boss forms clearance fit with the bottom surface of the cover plate corresponding to the right upper side. The technical measure ensures that the outer end part, the middle part and the inner end part of the air passage structure of the whole air hole are not on the same plane, the middle part is highest, and the outer exhaust gas and the inner gas guide body are required to be subjected to slope climbing and steering rewinding in the middle part, so that the air passage of the whole air hole is formed in a rugged and uneven structure, and the technical effect of preventing pollutants, particularly pollutants carried by gas, from invading the inside of the relay shell is excellent.

Furthermore, a turning cavity is formed in the position, corresponding to the ventilation base hole, of the bottom side surface of the cover plate in an inwards concave structure, the turning cavity corresponds to the position above the hole side boss in the assembly structure of the cover plate on the relay shell, and the diameter of the turning cavity is larger than the outer diameter of the hole side boss and/or the turning cavity is matched with the hole side boss in a staggered structure. The technical measure further effectively increases the 'bumpiness' of the air channel structure of the whole air vent, so that the air flowing through the air channel structure can inevitably generate steering and rewinding flow on the bottom surface of the cover plate, and dirt carried by the air can be reliably prevented from invading into the relay shell.

Furthermore, an upward convex shell-side bridge is arranged at the inner side edge part of the concave cavity, the top surface of the shell-side bridge is of a plane structure and is matched with the bottom surface of the concave cavity in a step structure, the cover plate is arranged in an assembly structure on the relay shell, and the bottom surface of the inner side edge part of the cover plate is in surface contact fit with the top surface of the shell-side bridge. Still further, a bridging space of an inner concave structure is formed between the local/whole shell side bridging in the inner concave cavity and the hole side boss, the bridging space corresponds to the bridging space, a downward convex cover side bridging is formed on the bottom side surface of the cover plate and forms a concave-convex matched cover side bridging with the bridging space, the cover plate is arranged in an assembly structure on the relay shell, and the cover side bridging of the cover plate is embedded in the bridging space formed between the shell side bridging and the hole side boss. The technical measure can effectively ensure the stability of the cover plate assembled in the concave cavity on the relay shell, and can ensure that the cover plate forms an excellent enclosure type protection technical effect at the outer end part of the ventilation base hole in the concave cavity, thereby reducing or even avoiding the intrusion of gas and gas-carried pollutants into the hollow interlayer between the cover plate and the relay shell through the ventilation auxiliary hole.

As one preferable scheme, a positioning seat is formed in the concave cavity of the relay housing in an upward protruding structure and located beside the ventilation base hole, and correspondingly, the cover plate is provided with a positioning hole through which the positioning seat can penetrate, the cover plate is arranged in an assembly structure on the relay housing, and the cover plate is assembled and fixed in the concave cavity on the relay housing through the sleeving and matching of the positioning hole and the positioning seat; the technical measure is beneficial to the cover plate to be conveniently, efficiently and stably assembled and fixed in the concave cavity of the relay shell by a simple structure on the premise of not obviously changing the structure of the relay shell. Furthermore, a positioning side boss is arranged on the positioning seat, the top surface of the positioning side boss is of a plane structure and is matched with the bottom surface of the concave cavity in a step structure, the cover plate is arranged in the assembling structure on the relay shell, and the bottom side surface of the cover plate is in surface contact matching with the top surface of the positioning side boss. The technical measure can not only ensure that the cover plate is stably and reliably assembled in the concave cavity of the relay shell, but also can effectively reduce or even prevent gas and gas-carried pollutants from invading into the hollow interlayer between the cover plate and the relay shell at the assembly matching position between the cover plate and the positioning seat.

Preferably, the outer edge of the cover plate is provided with a skirt fence protruding downwards, the auxiliary ventilation hole is formed in the skirt fence of the cover plate in a through groove structure, and in the assembly structure of the cover plate on the relay housing, the bottom surface of the skirt fence of the cover plate is in surface contact fit with the bottom surface of the outer edge of the concave cavity. The technical measure can not only enable the bottom side surface of the cover plate and the relay shell to form a hollow interlayer structure stably and reliably, but also can effectively reduce or even prevent gas and gas-carried pollutants from invading into the hollow interlayer between the cover plate and the relay shell through the air-permeable auxiliary holes.

In a preferred embodiment, in the assembly structure of the cover plate on the relay housing, the top surface of the cover plate is flush with the outer surface of the relay housing at the surface of the concave cavity. The technical measure enables the appearance structure of the relay shell after the cover plate is assembled to be basically not changed, the mature relay product line originally using the relay shell can continue to be used, the change of the mature relay product line of the type can not be related to the input of the relay shell basically, and the market popularization is facilitated.

The utility model has the beneficial technical effects that: above-mentioned technical measure does not make the change to ventilative base hole structure on the relay casing itself, but assembles a apron that neither obviously changes relay shell structure (including appearance structure) in the concave cavity of the ventilative base hole of shaping, can shelter from the outer tip of ventilative base hole effectively again, and this apron cooperation relay casing makes the air flue of the fashioned bleeder vent on the relay casing with the shaping of non-straight way structure, so, brings following two main technical advantages:

firstly, the cover plate forms enclosure type shielding protection on the outer end part of a ventilation base hole which is formed on the relay shell and used for forming the ventilation hole, pollutants can be effectively prevented from directly invading the interior of the relay shell through the ventilation base hole under the enclosure of the cover plate, and the technical effect of preventing a relay body assembled in the relay shell from being polluted is prominent;

secondly, need not the forming structure (including the outward appearance structure) of obvious change relay casing, especially can not change the ventilative basic hole structure on the relay casing, its forming structure is simple, convenient, with low costs, and the mature relay product line that originally uses this type relay casing can continue to use, can not relate to the change of this type of mature relay product line because of the input of this relay casing basically, is favorable to marketing.

Drawings

Fig. 1 is a relay housing with a breather structure.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic plan sectional structure view of the relay housing shown in fig. 2 at the air hole structure.

Fig. 4 is a view a-a of fig. 3.

Fig. 5 is a view taken from B-B of fig. 3 (the arrow in the figure indicates the direction of heat dissipation).

Fig. 6 is a schematic structural view (overall) of the relay case shown in fig. 2, 3, 4, and 5.

Fig. 7 is a partially enlarged view of fig. 6.

Fig. 8 is a schematic structural view of the cover plate shown in fig. 2, 3, 4 and 5.

Fig. 9 is an orthographic view of one side of the cover plate of fig. 8.

Fig. 10 is a bottom perspective view of the cover shown in fig. 8 and 9.

Fig. 11 is an exploded view of the relay housing and the cover plate of the present invention shown in fig. 2.

Fig. 12 is an exploded view of the relay housing and cover plate of the present invention shown in fig. 2.

The reference numbers in the figures mean: 1-relay housing; 11-concave cavity; 12-a gas permeable base hole; 12^,-a vent; 13-hole side boss; 14-positioning seat; 15-positioning a side boss; 16-bridging space; 17-shell side bridging; 2, covering a plate; 21-turning cavity; 22-positioning the bottom surface; 23-positioning holes; 24-skirt fencing; 25-ventilation auxiliary holes;26-bridging on the cover side; 27-locking the cavity.

Detailed Description

The utility model relates to an electromagnetic relay's component part-casing specifically is a bleeder vent structure on the electromagnetic relay casing, and this bleeder vent structure can be applicable to any relay that needs the relay casing to have the bleeder vent, especially prevents welding agent type relay, and it is right to follow with a plurality of embodiments the utility model discloses a main part technical content explains in detail. In the embodiment 1, the technical solution content of the present invention is clearly and specifically explained in conjunction with the attached drawings of the specification, that is, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11 and fig. 12; in other embodiments, although not separately depicted, the main structure of the embodiment can still refer to the drawings of embodiment 1.

It is expressly stated here that the drawings of the present invention are schematic, and unnecessary details have been simplified for the purpose of clarity in order to avoid obscuring the technical solutions that contribute to the prior art.

Example 1

Referring to fig. 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12, the present invention includes a relay case 1 and a cover plate 2.

Specifically, the relay housing 1 has a cavity structure with five closed sides and one open side, and the opposite open side is used as a cloth discharging surface (i.e., a top surface) of the vent hole. An inwards concave cavity 11 is formed in an inwards concave structure at one corner of the outer side surface of the surface where the air holes of the relay shell 1 are located, namely, the air holes which can communicate the internal environment and the external environment of the relay shell 1 are formed in the inwards concave cavity 11. It should be noted that, the air hole mentioned in the technical solution of the present invention does not refer to a certain hole section, but refers to an integral air passage structure formed by a plurality of hole sections connected together in sequence, in order to distinguish the air hole on the relay housing from the air hole mentioned in the present invention, the formed air hole on the relay housing is called a ventilation base hole, and the reference number in the drawing is 12.

The air-permeable base hole 12 formed in the concave cavity 11 on the outer side surface of the relay housing 1 is of a conventional straight hole structure, which is the simplest forming mode. The outer end part of the air-permeable base hole 12 protrudes upwards on the bottom surface of the concave cavity 11, and the protruding height is smaller than the depth of the concave cavity 11 to form a hole-side boss 13. The outer end of the hole side boss 13 protruding in the concave cavity 11 is of a plane structure, and the top surface of the hole side boss 13 is matched with the bottom surface of the concave cavity 11 in a step structure.

A convex column with a solid core structure, i.e. a positioning seat 14, protruding upward is further formed in the concave cavity 11 of the relay housing 1, the positioning seat 14 is located beside the air-permeable base hole 12, and the air-permeable base hole 12 and the positioning seat are kept in spaced fit, generally speaking, the arrangement position of the air-permeable base hole 12 is located at the inner side of the concave cavity 11 (i.e. close to the inner part), and the arrangement position of the positioning seat 14 is located at the outer side of the concave cavity 11 (i.e. close to the outer part). The protruding height of the positioning seat 14 in the concave cavity 11 is less than the depth of the concave cavity 11, and is at most flush with the depth of the concave cavity 11. The periphery of the middle part of the positioning seat 14 is provided with a plane formed by a step structure, namely a positioning side boss 15, the top surface of the positioning side boss 15 is of a plane structure and forms a step structure fit with the bottom surface of the concave cavity 11, and the top surface of the positioning side boss 15 and the top surface of the hole side boss 13 are required to be basically equal in height, namely the two are basically on the same plane. Further, it is preferable that the fixing base 14 above the positioning side boss 15 is formed in a tapered structure having a small upper end and a large lower end so as to be assembled with the cover plate 2.

The inner edge of the concave cavity 11 has a shell-side bridge 17 protruding upwards, i.e. the shell-side bridge 17 is formed along the inner contour edge of the concave cavity 11, and of course, a matching position with the cover plate 2 should be reserved at the end of the inner contour edge of the concave cavity 11. The top surface of the shell side bridging 17 is of a plane structure and is matched with the bottom surface of the concave cavity 11 in a step structure. The height of the projection of the shell-side bridge 17 is substantially equal to the height of the projection of the hole-side projection 13 and the height of the projection of the positioning-side projection 15, and the shell-side bridge 17 is integrally formed with the inner peripheral portion of the hole-side projection 13, and the shell-side bridge 17 is integrally formed with the inner peripheral portion of the positioning-side projection 15. In addition, a shell-side bridging 17 formed by turning the innermost side in the concave cavity 11 and the hole-side boss 13 form a bridging space 16 with a concave structure, that is, the shell-side bridging 17 and the hole-side boss 13 in one side direction are integrally formed, the shell-side bridging 17 and the hole-side boss 13 in the other side direction are matched with each other at a concave structure interval, the concave matching interval forms the bridging space 16, and the bottom surface of the bridging space 16 is the bottom surface of the concave cavity 11.

The cover plate 2 is a thin plate structure, and the plane outline structure of the cover plate is basically matched with the outline of the concave cavity 11 concavely formed on the outer side surface of the relay shell 1. That is, assuming that the cover plate 2 is seated in the concave cavity 11, the cover plate 2 can substantially fill the concave cavity 11.

The bottom surface of the cover plate 2 is intended to cooperate with the above-mentioned structure in the concave cavity 11, and the top surface of the cover plate 2 is intended to cooperate with the outer side surface of the relay housing 1.

One side of the cover plate 2 is a connecting portion, the connecting portion is formed with a positioning hole 23 by a through hole structure in the vertical direction, a hole-type contour of the positioning hole 23 is substantially matched with an outer contour of the positioning seat 14, and a diameter of the positioning hole 23 is smaller than an outer diameter of the positioning-side boss 15 and larger than an outer diameter of the fixing seat 14 at the positioning-side boss 15. The top surface of the connecting portion of the cover plate 2 has a locking recess 27 formed in a concave structure, and the positioning hole 23 is substantially at the center of the locking recess 27.

The other side of the cover plate 2 is a shielding part, the bottom surface of the shielding part is formed with a turning cavity 21 in an inward concave structure, and the diameter of the turning cavity 21 is larger than the outer diameter of the hole-side boss 13. The molding position of the turning cavity 21 on the cover plate 2 corresponds to the position of the gas-permeable base hole 12 when the cover plate 2 is seated in the concave cavity 11.

The bottom surface of the cover plate 2 is the same plane except for the bottom surface turned to the cavity 21, the bottom surface of the cover-side bridge 26 and the bottom surface of the skirt fence 24, and the remaining bottom surfaces are collectively referred to as the positioning bottom surface 22. In the following fitting structure, the positioning bottom surface 22 at the positioning hole 23 is fitted with the top surface of the positioning-side boss 15, and the positioning bottom surface 22 at the inner edge portion of the lid plate 2 is fitted with the top surface of the case-side bridge 17.

The cover plate 2 has a skirt fence 24 protruding downward at the outer edge, and the skirt fence 24 is formed at the cover plate 2 at a position corresponding to the outer edge of the concave cavity 11 when the cover plate 2 is seated in the concave cavity 11. The skirt 24 on the cover plate 2 has a projection height which substantially corresponds to the projection height of the positioning-side projection 15 and the shell-side bridge 17 in the concave cavity 11. In addition, a ventilation type groove, namely a ventilation auxiliary hole 25, is formed on the skirt part enclosure 24 of the cover plate 2 in a through groove structure, the forming position of the ventilation auxiliary hole 25 on the cover plate 2 should be staggered from the position of the ventilation base hole 12 when the cover plate 2 is located in the concave cavity 11, and the position of the ventilation auxiliary hole 25 should be close to the positioning seat 14.

The bottom surface of the cover plate 2 has a downwardly convex cover-side bridge 26, the height of the cover-side bridge 26 substantially corresponds to the height of the positioning-side projection 15 and the height of the shell-side bridge 17 in the concave cavity 11, and the width of the cover-side bridge 26 is smaller than the width of the bridge space 16. The lid-side bridges 26 are formed in the molding position of the bottom surface of the lid plate 2 corresponding to the above-mentioned bridge spaces 16 when the lid plate 2 is seated in the concave cavities 11.

When the cover plate 2 with the structure is assembled in the concave cavity 11 on the outer side surface of the relay shell 1:

the cover plate 2 is sleeved on the positioning seat 14 in the concave cavity 11 through the positioning hole 23 at the connecting part, so that the bottom side surface at the connecting part, namely the positioning bottom surface 22, is in surface contact fit with the top surface of the positioning side boss 15 on the positioning seat 14;

the positioning seat 14 is hot riveted in the locking cavity 27 of the connecting part of the cover plate 2; the highest position of the top surface of the cover plate 2 is basically flush with the outer side surface of the relay shell 1 on the surface of the concave cavity 11, the structure of the air-permeable base hole 12 on the relay shell 1 and the appearance structure of the relay shell 1 are basically not changed, and particularly under the action of the locking cavity 27, the appearance structure of the relay shell 1 is basically the same as the appearance structure of the existing relay shell with the concave cavity;

the blind portion of the cover plate 2 extends to the outer end of the gas-permeable base hole 12, above the gas-permeable base hole 12; the bottom surface of the cover plate 2 is not contacted and matched with the inner structure of the concave cavity 11, and is matched with the bottom surface of the concave cavity 11 in a height difference manner to form a hollow interlayer;

the turning cavity 21 at the bottom side of the cover plate 2 corresponds to the upper part of the hole-side boss 13, the top surface of the hole-side boss 13 forms clearance fit with the bottom surface of the turning cavity 21, part of the cavity wall of the turning cavity 21 is positioned at the outer side obliquely upper part of the outer wall of the corresponding area of the hole-side boss 13, and the cavity wall of the turning cavity 21 is matched with the outer wall of the hole-side boss 13 in a staggered structure, so as to ensure that the outer end part of the air-permeable base hole 12 is communicated with the hollow interlayer;

the bottom surface at the inner edge of the cover plate 2, i.e. the positioning bottom surface 22, is in surface contact fit with the top surface of the shell-side bridge 17 at the inner edge of the concave mould cavity 11;

the lid-side bridge 26 protruding from the bottom surface of the lid plate 2 is fitted into the bridge space 16 between the shell-side bridge 27 and the hole-side projection 13, and the bottom surface of the lid-side bridge 26 is in surface-contact fit with the bottom surface of the bridge space 16;

the bottom surface of the skirt enclosure 24 at the outer edge of the cover plate 2 is in surface contact fit with the bottom surface at the outer edge of the concave mould cavity 11, the end of the skirt enclosure 24 shielding the end of the shell-side bridge 17 inside the concave mould cavity 11; the auxiliary ventilation holes 25 formed in the skirt enclosure 24 are close to the positioning base 14 and are matched with the ventilation base holes 12 in a staggered structure.

Through the structure, the cover plate 2 capable of shielding the outer end part of the ventilation base hole 12 is assembled in the concave cavity 11 on the surface of the outer side of the relay shell 1, the bottom side surface of the cover plate 2 forms a hollow interlayer capable of communicating the ventilation base hole 12 between the concave cavity 11 and the bottom surface of the concave cavity 11, the ventilation auxiliary hole 25 communicated with the hollow interlayer on the cover plate 2 keeps staggered fit with the ventilation base hole 12, and finally the ventilation base hole 12, the hollow interlayer and the ventilation auxiliary hole 25 which are communicated in sequence on the relay shell 1 form a ventilation hole with a non-straight-channel structure.

Example 2

The utility model discloses a relay housing and apron.

Specifically, the relay shell is of a cavity structure with five closed surfaces and one open surface, and the surface opposite to the open surface is used as a cloth discharging surface of the air-permeable base hole. The outside surface one corner of the face that the ventilative basic hole of relay casing is located is with the concave structure shaping to have the indent die cavity, and this indent die cavity shaping has the ventilative basic hole that can communicate the internal environment and the external environment of relay casing promptly.

The air-permeable base hole formed in the concave cavity on the outer side of the relay shell is of a conventional straight hole structure, and the forming mode is the simplest. The outer end part of the ventilation base hole protrudes upwards from the bottom surface of the concave cavity, and the protruding height is smaller than the depth of the concave cavity to form a hole side boss. The convex top surface of the hole side boss in the inner concave cavity is matched with the bottom surface of the inner concave cavity in a step structure.

The relay housing is characterized in that a convex column with a solid core structure, namely a positioning seat, which protrudes upwards is formed in the concave cavity of the relay housing, the positioning seat is located beside the air-permeable base hole, and the air-permeable base hole and the positioning seat are in interval fit. The height of the protrusion of the positioning seat in the inner concave cavity is less than the depth of the inner concave cavity, and the height is flush with the depth of the inner concave cavity. The periphery of the middle part of the positioning seat is provided with a plane with a step structure, namely a positioning side boss, the top surface of the positioning side boss is of a plane structure and forms step structure matching with the bottom surface of the concave cavity. Further, it is preferable that the fixing base above the positioning side boss is formed in a tapered structure having a small upper end and a large lower end so as to be assembled with the cover plate.

The inner edge of the concave cavity is provided with a shell-side bridge which protrudes upwards, namely, the shell-side bridge is formed along the inner profile edge of the concave cavity in a protruding mode, and certainly, a matching position with the cover plate is reserved at the end part of the inner profile edge of the concave cavity. The top surface of the shell side bridging is of a plane structure and is matched with the bottom surface of the concave cavity in a step structure. The protruding height of the shell side bridge is basically equal to the protruding height of the hole side boss and the protruding height of the positioning side boss, the shell side bridge is independent of the hole side boss and the positioning side boss, a bridge space is formed between the corresponding peripheries of the shell side bridge and the hole side boss by an inward concave structure, a bridge space is formed between the corresponding peripheries of the shell side bridge and the positioning side boss by an inward concave structure, and the bottom surface of the bridge space is the bottom surface of the inward concave cavity.

The cover plate is of a thin plate structure, and the plane outline structure of the cover plate is basically matched with the outline of a concave cavity which is concavely formed on the outer side surface of the relay shell. That is, the cover plate is substantially able to plug the recessed cavity, assuming the cover plate is seated within the recessed cavity.

The bottom surface of the cover plate is adapted to engage the structure within the recessed cavity and the top surface of the cover plate is adapted to engage the outer surface of the relay housing.

One side of the cover plate is a connecting part, a positioning hole is formed in the connecting part in a through hole structure in the vertical direction, the hole pattern contour of the positioning hole is basically matched with the outer contour of the positioning seat, and the diameter of the positioning hole is smaller than the outer diameter of the positioning side boss and larger than the outer diameter of the fixing seat at the positioning side boss. The surface of the top side of the connecting part of the cover plate is provided with a locking concave cavity formed by an inner concave structure, and the positioning hole is basically positioned in the center of the locking concave cavity.

The other side of the cover plate is a shielding part, a steering cavity is formed on the bottom side surface of the shielding part in an inwards concave structure, the diameter of the steering cavity is larger than the outer diameter of the boss at the hole side, and the forming position of the steering cavity on the cover plate corresponds to the position of the ventilation base hole when the cover plate is located in the inwards concave cavity.

The cover plate is generally called a positioning bottom surface, except for a bottom surface at a turning cavity, a cover-side bridge bottom surface and a skirt fence bottom surface, the rest of the bottom surfaces are the same plane. In the following fitting structure, the positioning bottom surface at the positioning hole is fitted with the top surface of the positioning-side boss, and the positioning bottom surface at the inner edge portion of the cover plate is fitted with the top surface of the case-side bridge.

The outer edge of the cover plate is provided with a skirt part baffle protruding downwards, and the forming position of the skirt part baffle on the cover plate corresponds to the position of the outer edge of the concave cavity when the cover plate is located in the concave cavity. The height of the skirt enclosure projection on the cover plate substantially corresponds to the height of the projection of the locating side boss, shell side bridge, within the internal concave cavity. In addition, a ventilation type groove, namely a ventilation auxiliary hole, is formed on the skirt part surrounding baffle of the cover plate in a through groove structure, the forming position of the ventilation auxiliary hole on the cover plate is required to be staggered with the position of the ventilation base hole when the cover plate is located in the concave cavity, and the position of the ventilation auxiliary hole is required to be close to the positioning seat.

The cover plate has a downwardly convex cover-side bridge at the inner edge of the bottom surface, the height of the cover-side bridge substantially corresponds to the height of the positioning-side boss and the shell-side bridge in the inner cavity, and the width of the cover-side bridge is smaller than the width of the bridge space. The forming position of the cover-side bridges on the bottom side surface of the cover plate corresponds to the position of the above-mentioned bridge spaces when the cover plate is seated in the concave cavity, that is, the forming position of the cover-side bridges at the inner edge portion of the bottom side surface of the cover plate forms a finger-joint fit with the shell-side bridges when the cover plate is seated in the concave cavity.

When the cover plate with the structure is assembled in the concave cavity on the outer side surface of the relay shell:

the cover plate is sleeved on the positioning seat in the concave cavity through the positioning hole at the connecting part, so that the bottom side surface, namely the positioning bottom surface, at the connecting part is in surface contact fit with the top surface of the positioning side boss on the positioning seat;

the positioning seat is connected in a locked cavity of the cover plate connecting part in a hot riveting mode; the highest position of the top surface of the cover plate is basically flush with the outer side surface of the relay shell on the surface of the concave cavity, the structure of the air-permeable base hole on the relay shell and the appearance structure of the relay shell are basically not changed, and particularly under the action of the locking cavity, the appearance structure of the relay shell is basically the same as that of the existing relay shell with the concave cavity;

the blind portion of the cover plate extends to the outer end of the gas-permeable base hole, above the gas-permeable base hole; the bottom surface of the cover plate is not contacted and matched with the structure in the concave cavity, and is matched with the bottom surface of the concave cavity in a height difference manner to form a hollow interlayer;

the turning cavity at the bottom side of the cover plate corresponds to the upper part of the hole-side boss, the top surface of the hole-side boss is in clearance fit with the bottom surface of the turning cavity, part of the cavity wall of the turning cavity is positioned at the outer side obliquely above the outer wall of the corresponding area of the hole-side boss, and the cavity wall of the turning cavity is matched with the outer wall of the hole-side boss in a staggered structure so as to ensure that the outer end part of the air-permeable base hole is communicated with the hollow interlayer;

the bottom surface at the inner edge of the cover plate, i.e. the locating bottom surface, forms a surface contact fit with the top surface of the shell-side bridge at the inner edge of the cavity;

the cover-side bridge projecting from the bottom surface of the cover plate is fitted into the bridging space between the shell-side bridge and the hole-side boss and the bridging space between the shell-side bridge and the positioning-side boss, the cover-side bridge and the shell-side bridge form a "finger-joint" fit in the cavity, and the bottom surface of the cover-side bridge forms a surface contact fit with the bottom surface of the bridging space;

the bottom surface of the skirt at the outer edge of the cover plate forms a surface contact fit with the bottom surface at the outer edge of the recessed cavity, the end of the skirt shielding the shell-side bridging end inside the recessed cavity; the skirt part is surrounded and is kept off the ventilative auxiliary hole of shaping and be close to the positioning seat, with ventilative basic hole with dislocation structure cooperation.

Through the structure, the cover plate capable of shielding the outer end part of the ventilation base hole is assembled in the concave cavity on the outer side surface of the relay shell, the inner concave cavity and the bottom surface of the concave cavity form the inner hollow interlayer capable of communicating the ventilation base hole, the ventilation auxiliary hole communicated with the inner hollow interlayer on the cover plate is in dislocation fit with the ventilation base hole, and finally the ventilation hole with the ventilation base hole, the inner hollow interlayer and the ventilation auxiliary hole which are communicated in sequence on the relay shell forms the ventilation hole with the non-straight-channel structure air channel.

In this embodiment, the lid-side bridges are formed at the outer edge of the lid panel in a downwardly convex configuration, similar to the skirt barrier, except that one side of the lid-side bridges is in overlapping (or finger) engagement with the shell-side bridges projecting within the recessed cavity.

Example 3

The utility model discloses a relay housing and apron.

Specifically, the relay shell is of a cavity structure with five closed surfaces and one open surface, and the surface opposite to the open surface is used as a cloth discharging surface of the air-permeable base hole. The outside surface one corner of the face that the ventilative basic hole of relay casing is located is with the concave structure shaping to have the indent die cavity, and this indent die cavity shaping has the ventilative basic hole that can communicate the internal environment and the external environment of relay casing promptly.

The air-permeable base hole formed in the concave cavity on the outer side surface of the relay shell is of a conventional straight hole structure, which is the simplest forming mode. The outer end part of the ventilation base hole protrudes upwards from the bottom surface of the concave cavity, and the protruding height is smaller than the depth of the concave cavity to form a hole side boss. The top surface of the hole side boss is matched with the bottom surface of the concave cavity in a step structure. The periphery of the boss at the hole side is not contacted with the cavity wall of the concave cavity, so that the spacing fit is kept.

The relay housing is characterized in that a convex column with a solid core structure, namely a positioning seat, which protrudes upwards is formed in the concave cavity of the relay housing, the positioning seat is located beside the air-permeable base hole, and the air-permeable base hole and the positioning seat are in interval fit. The height of the protrusion of the positioning seat in the inner concave cavity is less than the depth of the inner concave cavity, and the height is flush with the depth of the inner concave cavity. The periphery of the middle part of the positioning seat is provided with a plane with a step structure, namely a positioning side boss, the top surface of the positioning side boss is of a plane structure and forms step structure matching with the bottom surface of the concave cavity. The periphery of the positioning side boss is not contacted with the cavity wall of the concave cavity, and the space matching is kept. Further, it is preferable that the fixing base above the positioning side boss is formed in a tapered structure having a small upper end and a large lower end so as to be assembled with the cover plate.

The cover plate is of a thin plate structure, and the plane outline structure of the cover plate is basically matched with the outline of a concave cavity which is concavely formed on the outer side surface of the relay shell. That is, the cover plate is substantially able to plug the recessed cavity, assuming the cover plate is seated within the recessed cavity.

The bottom surface of the cover plate is adapted to engage the structure within the recessed cavity and the top surface of the cover plate is adapted to engage the outer surface of the relay housing.

One side of the cover plate is a connecting part, a positioning hole is formed in the connecting part in a through hole structure in the vertical direction, the hole pattern contour of the positioning hole is basically matched with the outer contour of the positioning seat, and the diameter of the positioning hole is smaller than the outer diameter of the positioning side boss and larger than the outer diameter of the fixing seat at the positioning side boss. The surface of the top side of the connecting part of the cover plate is provided with a locking concave cavity formed by an inner concave structure, and the positioning hole is basically positioned in the center of the locking concave cavity.

The other side of the cover plate is a shielding part, a steering cavity is formed on the bottom side surface of the shielding part in an inwards concave structure, the diameter of the steering cavity is larger than the outer diameter of the boss at the hole side, and the forming position of the steering cavity on the cover plate corresponds to the position of the ventilation base hole when the cover plate is located in the inwards concave cavity.

The cover plate has a bottom surface, except for a bottom surface turned to the cavity and a bottom surface of the skirt fence described below, which are the same plane and collectively referred to as a positioning bottom surface. In the following fitting structure, the positioning bottom face at the positioning hole is fitted with the top face of the positioning side boss.

The skirt part surrounding baffles protruding downwards are arranged at the peripheral edge parts of the bottom side surface of the cover plate, the protruding heights of the skirt part surrounding baffles at all sections are basically equal in height, the forming positions of the skirt part surrounding baffles on the cover plate correspond to the positions of the peripheral edge parts of the concave cavity when the cover plate is located in the concave cavity, namely, the bottom side surface of the cover plate forms a concave cavity structure by the skirt part surrounding baffles protruding all around. The height of the skirt fence projection on the cover plate substantially corresponds to the height of the projection of the positioning side boss in the inner concave cavity. In addition, enclose to keep off with the through-hole structure shaping at the outside skirt section of apron and have a plurality of (2 to 4) ventilative hole of assisting, these ventilative hole of assisting are enclosed to keep off at skirt section and are gone up the interval and arrange, and should not shelter from by the chamber wall of indent die cavity when the apron is located in indent die cavity, and simultaneously, ventilative shaping position of assisting the hole on the apron should stagger the position of ventilative base hole when the apron is located in indent die cavity, the position of the hole of assisting of ventilating usually should be close to in the positioning seat.

When the cover plate with the structure is assembled in the concave cavity on the outer side surface of the relay shell:

the cover plate is sleeved on the positioning seat in the concave cavity through the positioning hole at the connecting part, so that the bottom side surface, namely the positioning bottom surface, at the connecting part is in surface contact fit with the top surface of the positioning side boss on the positioning seat;

the positioning seat is connected in a locked cavity of the cover plate connecting part in a hot riveting mode; the highest position of the top surface of the cover plate is basically flush with the outer side surface of the relay shell on the surface of the concave cavity, the structure of the air-permeable base hole on the relay shell and the appearance structure of the relay shell are basically not changed, and particularly under the action of the locking cavity, the appearance structure of the relay shell is basically the same as that of the existing relay shell with the concave cavity;

the blind portion of the cover plate extends to the outer end of the gas-permeable base hole, above the gas-permeable base hole; the bottom surface of the cover plate is not contacted and matched with the structure in the concave cavity, and is matched with the bottom surface of the concave cavity in a height difference manner to form a hollow interlayer;

the steering cavity at the bottom side of the cover plate corresponds to the upper part of the hole-side boss, the top surface of the hole-side boss is in clearance fit with the bottom surface of the steering cavity, all cavity walls of the steering cavity are positioned at the outer side obliquely upper part of the outer wall of the corresponding area of the hole-side boss, and the cavity wall of the steering cavity is matched with the outer wall of the hole-side boss in a staggered structure so as to ensure that the outer end part of the ventilation base hole is communicated with the hollow interlayer;

the bottom surface of the skirt surrounding around the cover plate is in surface contact fit with the bottom surface of the peripheral edge part of the concave cavity, so that the hole side boss at the outer end part of the air-permeable base hole is surrounded; the skirt part is surrounded and is kept off the ventilative auxiliary hole of shaping and be close to the positioning seat, with ventilative basic hole with dislocation structure cooperation.

Through the structure, the cover plate capable of shielding the outer end part of the ventilation base hole is assembled in the concave cavity on the outer side surface of the relay shell, the inner concave cavity and the bottom surface of the concave cavity form the inner hollow interlayer capable of communicating the ventilation base hole, the ventilation auxiliary hole communicated with the inner hollow interlayer on the cover plate is in dislocation fit with the ventilation base hole, and finally the ventilation hole with the ventilation base hole, the inner hollow interlayer and the ventilation auxiliary hole which are communicated in sequence on the relay shell forms the ventilation hole with the non-straight-channel structure air channel.

Example 4

The rest of the present embodiment is the same as embodiment 3, except that: the protruding height of the positioning side boss is greater than that of the hole side boss; the bottom surface of the cover plate is free of a turning cavity structure.

The above examples are only for illustrating the present invention and are not to be construed as limiting the same. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof, such as:

-the cover plate is fitted and fixed in the concave cavity, etc., by means of screwing or gluing; or the like, or, alternatively,

the positions of the air-permeable base hole and the positioning seat are exchanged, and the top surface of the cover plate is not suitable for forming a locking cavity; or the like, or, alternatively,

the hole-side projection at the outer end of the gas-permeable base hole is removed, which of course also leads to a loss of its functional correspondence;

such modifications or substitutions do not depart from the spirit and scope of the present invention in its essence.

Claims (10)

1. The utility model provides an electromagnetic relay casing bleeder vent structure, includes relay casing (1), the outside surface of relay casing (1) is provided with indent die cavity (11) with the indent structure, just be provided with ventilative base hole (12) that can communicate casing internal environment and external environment in indent die cavity (11), its characterized in that: the relay shell is characterized in that a cover plate (2) capable of shielding the outer end part of the ventilation base hole (12) is assembled in an inwards concave cavity (11) of the relay shell (1), the cover plate (2) forms an internally hollow interlayer capable of being communicated with the ventilation base hole (12) in the inwards concave cavity (11), a ventilation auxiliary hole (25) capable of being communicated with the internally hollow interlayer and the external environment is formed in the cover plate (2), and ventilation holes with non-straight-path structures are formed in the relay shell (1) through the ventilation base hole (12), the internally hollow interlayer and the ventilation auxiliary hole (25) which are communicated in sequence.

2. An electromagnetic relay casing bleeder vent structure as claimed in claim 1, wherein: ventilative basic hole (12) on relay casing (1) are straight hole structure, ventilative supplementary hole (25) shaping on apron (2) is in the lateral part department of apron (2), apron (2) are in the assembly structure on relay casing (1), ventilative supplementary hole (25) on apron (2) with ventilative basic hole (12) on relay casing (1) are with the dislocation structure cooperation.

3. The electromagnetic relay shell breather structure of claim 1 or 2, characterized in that: the outer end part of the ventilation base hole (12) is provided with a hole side boss (13) which protrudes upwards in the concave cavity (11), the top surface of the hole side boss (13) is matched with the bottom surface of the concave cavity (11) in a step structure, and part/all of the top surface of the hole side boss (13) is in clearance fit with the bottom surface of the cover plate (2) which corresponds to the right above.

4. The electromagnetic relay housing breather structure of claim 3, wherein: the bottom side surface of the cover plate (2) is provided with a turning cavity (21) in an inwards concave structure corresponding to the air-permeable base hole (12), the turning cavity (21) corresponds to the position above the hole side boss (13) in an assembly structure of the cover plate (2) on the relay shell (1), and the diameter of the turning cavity (21) is larger than the outer diameter of the hole side boss (13) and/or the turning cavity (21) is matched with the hole side boss (13) in a staggered structure.

5. The electromagnetic relay housing breather structure of claim 3, wherein: the relay comprises a relay shell body (1), and is characterized in that an upwards-protruding shell-side bridging (17) is arranged at the inner side edge part of the concave cavity (11), the top surface of the shell-side bridging (17) is of a plane structure and is matched with the bottom surface of the concave cavity (11) in a step structure, the cover plate (2) is arranged in an assembly structure on the relay shell body (1), and the bottom surface of the inner side edge part of the cover plate (2) is matched with the top surface of the shell-side bridging (17) in a surface contact mode.

6. The electromagnetic relay housing breather structure of claim 5, wherein: form bridging space (16) of indent structure between the local/whole and hole side boss (13) of shell side bridging (17) in indent die cavity (11), correspond with it, the bottom surface of apron (2) have to the downwarping, with bridging space (16) forms unsmooth complex lid side bridging (26), apron (2) are in assembly structure on relay housing (1), lid side bridging (26) of apron (2) inlay and be in shell side bridging (17) with form between hole side boss (13) in bridging space (16).

7. The electromagnetic relay shell breather structure of claim 1 or 2, characterized in that: the positioning seat (14) is formed in an inwards concave cavity (11) of the relay shell (1) in an upwards protruding structure and located beside the air-permeable base hole (12), the positioning seat (14) corresponds to the inwards concave cavity, a positioning hole (23) capable of penetrating the positioning seat (14) is formed in the cover plate (2), the cover plate (2) is arranged in an assembly structure on the relay shell (1), and the cover plate (2) is assembled and fixed in the inwards concave cavity (11) on the relay shell (1) through the positioning hole (23) and the positioning seat (14) in a sleeving matching mode.

8. The electromagnetic relay housing breather structure of claim 7, wherein: the relay comprises a relay shell (1) and is characterized in that a positioning side boss (15) is arranged on the positioning seat (14), the top surface of the positioning side boss (15) is of a plane structure and is matched with the bottom surface of the concave cavity (11) in a step structure, the cover plate (2) is arranged in an assembly structure on the relay shell (1), and the bottom side surface of the cover plate (2) is in surface contact fit with the top surface of the positioning side boss (15).

9. The electromagnetic relay shell breather structure of claim 1 or 2, characterized in that: the outer side edge of the cover plate (2) is provided with a skirt enclosing barrier (24) protruding downwards, the air-permeable auxiliary hole (25) is formed in the skirt enclosing barrier (24) of the cover plate (2) in a through groove structure, the cover plate (2) is arranged in an assembly structure on the relay shell (1), and the bottom surface of the skirt enclosing barrier (24) of the cover plate (2) is in surface contact fit with the bottom surface of the outer side edge of the concave cavity (11).

10. The electromagnetic relay shell breather structure of claim 1 or 2, characterized in that: in the assembly structure of the cover plate (2) on the relay shell (1), the top surface of the cover plate (2) is flush with the outer side surface of the relay shell (1) on the surface of the concave cavity (11) at most.

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