Waterproof type substrate housing case

The first case made of metal and the second case made of resin seal the circuit substrate 130 hermetically by the adhesive seal material, an engaging elastic member having a hook part is stand up at an inclination angle θ of less than 90 degrees at the front of a plurality of pressing elastic members provided on the outer periphery of the second case, when the first case is mounted by the assembling jig, the engaging elastic member moves backward, when the first case is pushed further, the pressing elastic member is bent upward by the jig base, the hook part is engaged, when the jig is removed, the first case and the second case are pressed against each other by the restoring force of the pressing elastic member, when the adhesive seal material is dried and cured, the adhesion force thereof secures close contact integrity between the cases.

This application relates to a structure of a waterproof type substrate housing case applied to, for example, an electronic control device mounted in vehicle, in particular for the improvement of an integrated structure of a pair of cases constituting a housing case.

BACKGROUND ART

A waterproof type substrate housing case, wherein a rectangular circuit substrate is hermetically stored in a housing constituted by a first case and a second case, mounted on a first side of the circuit substrate, comprising a connector housing made of resin in which part of it is exposed from the opening of the housing, as well as a plurality of connection terminals press-fitted into the inner and outer partition walls of the connector housing wherein one end of the connection terminal is connected to the circuit pattern of the circuit substrate, and the other end has conductive contact with the contact terminal of the mating connector as a method for integrating the first case and the second case, is known to eliminate the screw tightening structure with poor assembling workability, and to use a snap fit.

For example, according toFIGS. 3 and 4of the “driver device and motor device” described in the following patent literature 1, the opening part11aof the case11is sealed with a cover12via a seal member J, by fitting the tongue part17of the cover12and the hook part15of the case11, the cover12is prevented from falling off. The hook part15is configured to attract the case11and the cover12by the action of the inclined engagement surface15a.

As a result, it is possible to suppress the deterioration of the sealing property while adopting the attachment structure by the snap fit, it is possible to prevent the case and the cover from being damaged and the increase in manufacturing cost can be suppressed, according toFIG. 1, an elastic clipping part formed by the hook part15and the tongue part17are provided at four positions on the four sides of the case11.

PRIOR ART DOCUMENT

Patent Literature

Disclosure of Invention

Technical Problem

The “driver device and motor device” in the patent literature 1 is such that the cover12is pressed against the opening surface11aof the case11by the elastic force of the tongue part17, the pressing part force depends on the inclination angle of the engaging surface15aof the hook part11, further, since the actual pressing force is reduced by the frictional resistance between the engaging surface15aof the hook part11and the tongue part17, the seal member J is peeled off due to vibration of the vehicle body which is the mounting structure, there is a problem that the pressure holding retention strength between the cover12and the case11in the circuit substrate is lowered due to this peeling.

An object of the present application is to improve the vibration proof performance of a waterproof type substrate housing case integrating a first case and a second case holding a circuit substrate with a snap fit and an adhesive sealing material, and to provide a waterproof type substrate housing case in which the screw tightening operation becomes unnecessary even with a metal material with good heat conductivity.

Solution to Problem

In the waterproof type substrate housing case disclosed in this application, a rectangular circuit substrate is hermetically stored in a housing constituted by a first case made of metal and a second case made of resin, the waterproof type substrate housing case has a connector housing made of resin and mounted on the first side of the circuit substrate in which part of it is exposed from the opening of the housing, as well as a plurality of connection terminals press-fitted into the inner and outer partition walls of the connector housing, wherein one end of the connection terminal is connected to the circuit pattern of the circuit substrate, and the other end makes conductive contact with the contact terminal of the mating connector, and an annular adhesive sealant is applied to the outer periphery of the connector housing and is held in the opening of the housing.

In the circuit substrate, two orthogonal sides to the first side and the second side which is a side opposite to the first side, and three sides of a U-shape including the first side and the second side, are sandwiched by the three-sided holding surfaces of the first case and the second case, and a three-way adhesive sealing material is applied to the outer periphery of these three-sided holding surfaces, a pair of first side engaging elastic members are provided on the first side of the second case, a pair of orthogonal side engaging elastic members are provided on two orthogonal sides according to the first side, or a pair of second side engaging elastic members are provided on the second side opposite to the first side, each of the engaging elastic members of the first side, the two orthogonal sides and each engaging elastic member of the second side has a hook part that engages with an outer engaging surface part of the first case, each of the engaging elastic members is further connected to the second case via a pressing elastic member, each of the engaging elastic members and the pressing elastic members has a coupling inclination angle θ of less than 90 degrees, the relative planar position of the first case and the second case is regulated by an uneven regulating position or an uneven regulating member.

Advantageous Effects of Invention

According to the waterproof type substrate housing case disclosed in this application, the circuit substrate is housed in a hermetically sealed housing constituted by a first case, a second case and a three-way adhesive sealing material, a part of the connector housing mounted on the circuit substrate is configured to be exposed from the opening of the sealed housing via the annular adhesive seal material, the first case and the second case are pressed and fixed by a plurality of engaging elastic members, the engaging elastic member is fixed to the second case via a pressing elastic member having a connecting inclination angle of less than 90 degrees, the hook part provided at the tip of the engaging elastic member engages with the outer engaging surface part of the first case, the relative planar position between the first case and the second case is regulated by an uneven regulating position or an uneven regulating member.

Therefore, the engaging elastic member presses the side face of the first case to the side for preventing the hook part from coming off, the pressing elastic member has a function of press-contacting the first case and the second case by an elastic restoring force, as a result, the screws for fixing the first case and the second case by pressure welding are eliminated, it is possible to replace it with an engaging elastic member with good assembling workability, the engaging elastic member alone maintains the pressure contact state in a period until the adhesive seal material is dried and cured, since vibration resistance can be ensured in cooperation with the adhesive sealing material at the practical stage, even when a metal material having good heat dissipation property is used as the first case, vibration resistance can be maintained.

Since the sealing gap of the adhesive sealing material constituted by the sealing surfaces of the first case and the second case opposing each other is stably secured by the uneven regulating position or the uneven regulating member of the first case and the second case, the performance of integrating the first case and the second case with the adhesive sealing material is stabilized.

DESCRIPTION OF EMBODIMENTS

First Embodiment

(1) Detailed Description of Composition and Operation

The first embodiment of the present invention will be described according toFIGS. 1 to 6.

The configuration and operation in each figure will be sequentially and explained in detail,FIG. 1Awhich is a top external view of the waterproof type substrate housing case according to the first embodiment,FIG. 1Bwhich is a side external view as seen in the direction of arrow1B inFIG. 1A,FIG. 2Awhich is an external view of the rear surface of the waterproof type substrate housing case inFIG. 1A, the waterproof type substrate housing case inFIG. 2AwhereinFIG. 2Bis a side external view as seen in the direction of the arrow2B inFIG. 2A, the waterproof type substrate housing case diagram shown inFIG. 1AwhereinFIG. 3Awhich is a lateral external view seen in the direction of the arrow3A inFIG. 1A, the waterproof type substrate housing case shown inFIG. 3AwhereinFIG. 3Bwhich is a side external view seen in the direction of the arrow3B inFIG. 3A,FIG. 4Awhich is a cross-sectional view of the section taken along the line4A-4A ofFIG. 3Aas seen in the direction of the arrow, and the waterproof type substrate housing case inFIG. 4AwhereinFIG. 4B, which is a side external view as seen in the direction of the arrow4B inFIG. 4A,

First, inFIGS. 1A and 1B, in a waterproof type substrate housing case100A, a first case110A made of aluminum die-casting, and a second case120A made of resin provided on the back surface, are integrally formed by later-described first side engaging elastic members121aand121band orthogonal side engaging elastic members123aand123b, at the four corners ofFIG. 1Awhich is a plan view. In the waterproof type substrate housing case100A, a circuit substrate130(seeFIG. 4A) on which a connector housing131including a first connector housing131aand a second connector housing131bis mounted is hermetically housed.

In the first case110a, each hook part124(seeFIG. 4A) of the first side engaging elastic members121aand121bprovided on the second case120aside as well as the orthogonal side engaging elastic members123aand123bprovides the outer engaging surface part111to be engaged. Further, in the first case110ahaving such a structure, a plurality of attachment fixing parts112attached and fixed to an attachment surface194(seeFIG. 4A) and a plurality of radiation fins113bprovided in a canopy part113aare provided.

Also,FIGS. 2A and 2Billustrate a water repellent filter141provided in the second case120a. The water repellent filter141ventilates the inside and the outside in response to the pressure difference between the inside and the outside due to the temperature difference between the inside and outside of the waterproof type substrate housing case100A. When this ventilation is performed, the water repellent filter141is constituted by a porous material prohibiting the movement of moisture accompanying aeration.

Further, inFIGS. 3A and 3B, with respect to the first and second connector housings131aand131bexposed from the opening formed on one side of the connector side by the first case110aand the second case120a, an annular adhesive sealing material140aprovided on the outer periphery thereof is shown, the annular adhesive sealing material140aprevents water from entering from the opening. On the remaining three sides of the first case110aand the second case120a, a three-way adhesive sealing material140bis provided.

The annular adhesive seal material140asurrounding the connector housing131has a trapezoidal shape as illustrated inFIG. 3A. The oblique side part and the top side part of the trapezoidal annular adhesive seal material140aare in contact with corresponding planar parts of the opening of the first case110a, the bottom side part of the trapezoidal annular adhesive seal material140ais brought into contact with the corresponding planar part of the opening part of the second case120a, the annular adhesive seal material140ais configured.

In addition, the bottom side part of the trapezoidal shape as illustrated inFIG. 3B, in order to connect with the three-way adhesive seal material140b, the annular adhesive seal material140ais configured.

Furthermore, as illustrated inFIGS. 4A and 4B, three sides are clamped by the first case110aand the second case120a, and a three-way adhesive sealing material140bis provided on the outside.

On the side surface of the second case120a, a pressing elastic member121xis provided. The pressing elastic member121xis formed by pressing, when pressed upward from the jig base192provided on the jig bottom surface193of the assembling jig shown by a dotted line, it provides elasticity curving upward inFIG. 4A. When the jig is removed, due to the restoring force of the pressing elastic member121x, the first case110aand the second case120aare brought into pressure contact via the first side engagement elastic members121aand121band the hook part124.

In addition, a first side engaging elastic member121ais provided at an end part of the pressing elastic member121x, the first side engaging elastic member121ahas a connecting inclination angle θ and stands up in a substantially right angle direction. The hook part124is provided at the end part of the first side engaging elastic member121aand engages with the outer engaging surface part111of the first case110a.

In order to enhance the elastic engaging force with the outer engaging surface part111of the first side engaging elastic member121a, as illustrated inFIG. 4B, reinforcing arc-shaped part125aand125aare provided on both side surfaces of the first side engaging elastic member121a.

Further, in order to prevent the bottom surface part of the pressing elastic member121xfrom being pressed from the side of the mounting surface, a setting gap G0is provided between the attachment surface of the attachment fixing part112provided in the first case110aand the bottom surface of the pressing elastic member121x.

Next, the configuration and operation in each figure will be sequentially and in detail explained,FIG. 5Awhich is a top view of the engaging elastic member used in the waterproof type substrate housing case shown inFIGS. 1A and 1B,FIG. 5Bwhich is a side view of the engaging elastic member used in the waterproof type substrate housing case shown inFIGS. 1A and 1B,FIG. 6Awhich is a cross-sectional view of the section taken along line6A-6A ofFIG. 2Aas viewed in the direction of the arrow,FIG. 6Bwhich is a side external view seen in the direction of the arrow6B inFIG. 1A, andFIG. 6Cwhich is a cross-sectional view of the cross section taken along the line6C-6C ofFIG. 1Aas viewed in the direction of the arrow.

First, inFIGS. 5A and 5B, on the end face of the pressing elastic member121xprovided on the side surface of the second case120a, the bottom part of the engaging part126cis provided via a pair of connecting members126aand126b, thereby, a punched hole part127is constituted. The first side engaging elastic member121a having a connecting inclination angle θ stands up on the bottom part of the engaging part126c. By inserting and withdrawing a metal mold (not shown) in the direction of arrow191with respect to the mold insertion part190, the inner surface of the first-side engaging elastic member121a and the hook part124are generated.

The pair of first side engaging elastic members121aand121band the pair of orthogonal side engaging elastic members123aand123bhave a common structure. Then, as in the explanation inFIG. 4A, when the jig inFIG. 4Ais removed when the jig is removed, due to the restoring force of the pressing elastic member123x, the first case110A and the second case120A are brought into pressure contact via the orthogonal side engagement elastic members123aand121band the hook part124.

InFIGS. 5C and 5Dshowing a top view and a side view of the engaging elastic member, which is a modification of the engaging elastic member illustrated inFIGS. 5A and 5B, the first side engaging elastic member121ahas engaging widening part126aaand126bb. The engagement widened parts126aaand126bbare connected to each other via the reinforcing arc-shaped parts125aaand125bb, and is integrated with the connecting members126aand126b. InFIG. 5C, the reinforcing arc-shaped parts125aaand125bbprovided on the right side of the engagement widened part126aaand126bbare formed in a rectangular shape, and can also be provided on the left side of the engagement widened parts126aaand126bb.

InFIG. 6A, an adhesive sealing surface119to be a concave part and an adhesive sealing surface129to be a convex part are provided on three sides of the first case110A and the second case120A so as to face each other. With such a structure, in the adhesive sealing gap formed between the adhesive sealing surface119and the adhesive sealing surface129, for example, a three-way adhesive sealing material140b, which is a one-component cold-setting adhesive or two-component thermosetting adhesive, is applied, the adhesive sealing material140bcooperates with the annular adhesive seal material140adescribed above with reference toFIGS. 3A and 3B, the first case110A, the second case120A, and the connector housing131are integrated, by this integration, a hermetically sealed housing that houses the circuit substrate130in a sealed state is constituted.

On the side surface of the second case120a, a pressing elastic member123bis provided.

On the left and right of the second case120A, orthogonal side engaging elastic members123band123aare provided via the pressing elastic members123xand123x. The hook part124provided at the distal end part of the orthogonal side engaging elastic members123b, engages with the outer engaging surface part111of the first case110A, until at least the annular adhesive seal material140aand the three-way adhesive sealing material140bare sufficiently cured, by the plurality of orthogonal side engaging elastic members123aand123band the first side engaging elastic members121aand121b(seeFIG. 1A), the first case110A, the second case120A, and the connector housing131are integrated, by this integration, a hermetically sealed housing for housing the circuit substrate130is constituted.

InFIG. 6B, the orthogonal side engaging elastic member123bprovided upright on the pressing elastic member123xof the second case120, and is opposed to the position regulating protruding piece114provided on the first case110A via the uneven regulating gap G1. Accordingly, inFIG. 1A, even if the second case120A is pressed upward inFIG. 1Aby the first side engaging elastic members121aand121b, the uneven distribution of the second case120A is regulated by the uneven regulating gap G1provided in the orthogonal side engaging elastic members123aand123b, and the occurrence of unevenness of the adhesive sealing gap with respect to this direction is suppressed.

InFIG. 6C, on the three sides of the first case110A and the second case120A, the adhesive sealing surface119to be a concave part and the adhesive sealing surface129to be a convex part are provided to face each other, the adhesive sealing gap constituted by such a structure, the rear end groove gap G3is larger than the front end groove gap G2on the sloping side. Accordingly, inFIG. 1A, even if the second case120A is pressed in the left-right direction inFIG. 1A(vertical direction inFIG. 6C) by the orthogonal side engaging elastic members123aand123b, the uneven distribution of the second case120A is restricted by the uneven regulating gap G1provided in the first side engaging elastic members121aand121b, and the occurrence of unevenness of the adhesive sealing gap with respect to this direction is suppressed.

(2) Summary and Features of the First Embodiment

As is clear from the above description, in the waterproof type substrate housing case100A according to the first embodiment, a rectangular circuit substrate130is hermetically stored in a housing constituted by a first case110A made of metal and a second case made of resin, mounted on the first side of the circuit substrate130, comprising a connector housing131made of resin in which part of it is exposed from the opening of the housing, as well as a plurality of connection terminals132press-fitted into the inner and outer partition walls of the connector housing131, wherein one end of the connection terminal is connected to the circuit pattern of the circuit substrate130, and the other end makes conductive contact with the contact terminal of the mating connector, an annular adhesive sealant140ais applied to the outer periphery of the connector housing, two sides orthogonal to each other including the two sides orthogonal to the first side and the second side which is opposite to the first side and the second side in the opening of the housing, the circuit substrate130is sandwiched by three-sided holding surfaces NS1, NS2of the first case110A and the second case120A, and a three-way adhesive sealing material140bis applied to the outer periphery of the three-sided holding surface.

As shown inFIG. 6A, the three-sided holding surface NS1of the first case110A and the three-sided holding surface NS2of the second case120A holding the three sides of the circuit substrate130, and the third side and the fourth side as the two orthogonal sides shown as the both end edges of the circuit substrate130arranged in the horizontal state are clamped, the horizontal width part having a predetermined dimension from the outer end edge is held by the three-sided holding surfaces NS1, NS2. On the second side which is the opposite side of the first side of the circuit substrate130on which the connector housing131is mounted, a horizontal width part having a predetermined dimension from the outer end edge is sandwiched by the three-sided holding surfaces NS1and NS2.

A pair of first side engaging elastic members121aand121bare provided on the first side of the second case120A, a pair of orthogonal side engaging elastic members123aand123bare provided on two orthogonal sides according to the first side, each of the engaging elastic members of the first side and the two orthogonal sides have a hook part124that engages with the outer engaging surface part111of the first case110A, the respective engaging elastic members are connected to the second case120A via each of the engaging elastic member and the pressing elastic members121xand123x, each of the engaging elastic members and the pressing elastic member121xand123xhas a coupling inclination angle θ of less than 90 degrees, the relative planar position between the first case110A and the second case120A is regulated by the uneven regulating position G1, G2, G3or the uneven regulating member128.

Accordingly, the engaging elastic members121a,121b,123a, on the side that prevents disengagement (disconnect/unlatch) of the hook part124from the outer engaging surface part111, the side surface of the first case110A is pressed, the pressing elastic member121xhas a function of press-contacting the first case110A and the second case120A by its own elastic restoring force, as a result, the screws conventionally used for press-contacting and fixing the first case110A and the second case120A to each other are eliminated, it can be replaced by an engaging elastic member with good assembling workability.

Therefore, the engaging elastic members121a,121b,123a,123bmaintain the pressure contact state in a period until the adhesive seal material140a,140bare dried and cured, since vibration resistance can be ensured with the adhesive sealing material140aand140bat the practical stage, even when a metal material having good heat dissipation property is used as the first case110A, vibration resistance can be maintained.

Since the sealing gap of the adhesive sealing material constituted by the sealing surfaces of the first case110A and the second case120A opposing each other is stably secured by the uneven regulating position G1, G2, G3of the first case110A and the second case120A or the uneven regulating member128, the performance of integrating the first case110A and the second case120B with the adhesive sealing material is stabilized.

The engaging elastic members121a,121b,123a,123bstand up at the end part of the pressing elastic members121x,123x, with respect to the bottom part of the engaging part126cconnected via the pair of connecting members126aand126bhas a pair of reinforcing arc-shaped parts125a,125b, or the engaging widening parts126aaand126bbprovided on the respective engaging members and a pair of reinforcing arc-shaped parts125aaand125bbprovided between the pair of connecting members126aand126b.

As described above, in relation to the technical feature item2of this application, on both sides of the engaging elastic members121a,121b,123a,123bstanding on the end parts of the pressing elastic members121x,123xof the second case120A, a pair of reinforcing arc-shaped parts125a,125b,125aa,125bbare provided. Accordingly, the strength of the engaging elastic members121a,121b,123a,123bfor pressing the side surface of the first case110A can be increased, the hook part124of the respective engaging elastic members121a,121b,123a,123bcan be generated by a simple metal mold structure.

This feature applies for the second embodiment in the same way.

The first case110A includes an attachment fixing part112to be fixed to the attachment surface194of the attachment subject, further, between the attachment surface194and the pressing elastic members121x,123x, a setting gap G0having a size equal to or larger than the elastic deformation amount of the pressing elastic members121x,123xis provided.

As described above, according to the technical feature item3of the present application, a space of the setting gap G0is provided on the back surface of the pressing elastic members121xand123xon the mounting surface194side. Therefore, for example, when the mounting surface194is deformed, or in the case where a foreign object is interposed in the space of the setting gap G0, the pressing elastic members121xand123xare pressed and deformed, it is possible to prevent the press-contact force between the first case110A and the second case120A from being reduced.

This feature applies for the second embodiment in the same way.

The seal grooves filled with the annular adhesive seal material140a(seeFIGS. 3A and 3B) and the three-way adhesive sealing material140b(seeFIGS. 4A, 6A, and 6C) are opposed to each other, (seeFIGS. 6A and 6C) and the adhesive seal surface119(seeFIGS. 6A and 6C) which serves as a slope-shaped convex part, further, the front end groove gap G2of the seal groove is set to be smaller than the rear end groove gap G3of the seal groove, and these constitute the uneven regulating position.

As described above, according to the technical feature item5of this application, the front end groove gap G2of the seal groove filled with the annular adhesive seal material140aand the three-way adhesive sealing material140bis set to be smaller than the rear end groove gap G3of the seal groove. Accordingly, the deviation between the center position of the first case110A and the center position of the second case120A, which is caused by pressing the first case110A in the planar direction by the plurality of engagement elastic members121a,121b,123a,123bis regulated by the front end groove gap G2of the seal groove, also, there is a feature that the adhesion strength between the first case110A and the second case120A can be suppressed from being lowered by the adhesive seal material in the rear end groove gap G3.

This feature applies for the second embodiment in the same way.

The outer engaging surface part111of the outer peripheral end face of the first case110A is provided with position regulating protruding piece114protruding on both sides of the plurality of engaging elastic members121a,121b,123a,123b, further, the position regulating protruding piece114faces both side faces of the engaging elastic members121a,121b,123a,123bvia the uneven regulating gap G1, these configurations are the uneven regulating member and the uneven regulating position.

As described above, according to the technical feature item6of the present application, the position regulating protruding piece114protruding to the outer peripheral end face of the first case110A is brought into contact with the engaging elastic members121a,121b,123a,123b, respectively. Therefore, even if the first case110A is pressed in the planar direction by the plurality of engaging elastic members121a,121b,123a,123b, since the pressing position is restricted by the uneven regulating gap G1in the engaging elastic member orthogonal to the pressing direction, a reduction in the bonding strength between the first case110A and the second case120A with respect to this direction is suppressed.

This feature applies for the second embodiment in the same way.

Second Embodiment

(1) Detailed Description of Composition and Operation

RegardingFIG. 7Awhich is an external view of the rear surface of the waterproof type substrate housing case according to the second embodiment andFIG. 7Bwhich is a cross-sectional view taken along the line7B-7B ofFIG. 7Aas seen in the arrow direction, the configuration and operation thereof will be described focusing on differences from the first embodiment.

The difference in the embodiment is indicated by the difference in alphabet of uppercase letters in the reference numerals in the figure. For example, the waterproof type substrate housing case100B in each ofFIGS. 7A and 7B, which exemplifies the second embodiment, corresponds to the waterproof type substrate housing case100A according to the first embodiment. Further, in the first embodiment, by the first side engaging elastic members121a,121band the orthogonal side engaging elastic members123a,123bas described above, the first case110A and the second case120A are integrated. In contrast, in the second embodiment, by the first side engaging elastic members121a,121band the second side engaging elastic members122a,122b, the first case110B and the second case120B are integrated.

First, inFIGS. 7A and 7B, in the waterproof type substrate housing case100B, the first case110B made of aluminum die-casting provided at the position of the surface inFIG. 7A, and the second case120B made of resin provided at the position of the surface inFIG. 7A, are integrally formed at the first side engaging elastic members121aand121band second side engaging elastic members123aand122b, at the four corners. In the waterproof type substrate housing case100B, the circuit substrate130(seeFIG. 4A) on which the connector housing131including the first connector housing131aand the second connector housing131bmounted is hermetically housed. Accordingly, similarly to the case described with reference toFIG. 4A, the first case110B, the first case engaging elastic members121aand121bprovided on the side of the second case120B and the outer engaging surface part111engaged with the hook part124of the second side engaging elastic members122aand122b, further, the waterproof type substrate housing case100B is provided with a plurality of attachment fixing parts112attached and fixed to the attachment surface194(seeFIG. 4A) and a plurality of radiation fins113bprovided on the canopy part113a.

The waterproof type substrate housing case100B according to the second embodiment includes the concavity part118provided at the four corners of the first case110B and the protruding part128provided at the four corners of the second case120B. The concavity part118and the protruding part128are provided at a pair of diagonal positions of at least the waterproof type substrate housing case100B and are fitted to each other. The concavity part118and the protruding part128which are fitted to each other are the uneven regulating member for determining the relative planar position between the first case110B and the second case120B.

In the case where the concavity part118serving as the uneven regulating member and the protruding part128are provided, the uneven regulating gap G1inFIG. 6Bis unnecessary, and it is sufficient to make it a sufficiently large gap. In addition, the front end groove gap G2and the rear end groove gap G3inFIG. 6Ccan be made the same size. In the first embodiment, as in the second embodiment, it is also possible to provide the concavity part118and the protruding part128, which are uneven regulating members.

In the above description, the first case110A and the first case110B are both made of aluminum die-cast, but since the heat generated by the heat-generating components in the waterproof type substrate housing case100A;100B is small, in the case of the waterproof type substrate housing case which does not require the radiation fin113b, the first case110A,110B may be made of sheet metal. When the first case110A,110B is lightweight, it is also possible to provide the mounting fixing part112on the side of the second case120A,120B.

(2) Summary and Features of the Second Embodiment

As it is clear from the above description, in the waterproof type substrate housing case100B according to the second embodiment, a rectangular circuit substrate130is hermetically stored in a housing constituted by a first case110B made of metal and a second case120B made of resin, mounted on the first side of the circuit substrate130, comprising a connector housing131made of resin in which part of it is exposed from the opening of the housing, as well as a plurality of connection terminals132press-fitted into the inner and outer partition walls of the connector housing131, wherein one end of the connection terminal is connected to the circuit pattern of the circuit substrate130, and the other end makes conductive contact with the contact terminal of the mating connector, an annular adhesive sealant140ais applied to the outer periphery of the connector housing, two sides orthogonal to each other including the two sides orthogonal to the first side and the second side which is opposite to the first side and the second side in the opening of the housing, the circuit substrate130is sandwiched by three-sided holding surfaces of the first case110B and the second case120B, and a three-way adhesive sealing material140bis applied to the outer periphery of the three-sided holding surface.

As inFIG. 6A, the three-sided holding surface NS1(seeFIG. 6A) of the first case110B and the three-sided holding surface NS2(seeFIG. 6A) of the second case120B holding the three sides of the circuit substrate130, and the third side and the fourth side as the two orthogonal sides shown as the both end edges of the circuit substrate130arranged in the horizontal state are clamped, the horizontal width part having a predetermined dimension from the outer end edge is held by the three-sided holding surfaces. On the second side which is the opposite side of the first side of the circuit substrate130on which the connector housing131is mounted, a horizontal width part having a predetermined dimension from the outer end edge is sandwiched by the three-sided holding surfaces. The clamping relationship by the three-sided holding surface is the same as the holding relationship of the three-way holding surfaces NS1, NS2shown inFIG. 6A inFIG. 6described in the first embodiment.

Then, a pair of first side engaging elastic members121aand121bare provided on the first side of the second case120B, a pair of second-side engaging elastic members122a,122bare provided on a second side that is the opposite side of the first side, each of the engaging elastic members of the first side and the second side has a hook part124engaged with the outer engaging surface part111of the first case110B, each of the engaging elastic members is connected to the second case120B via pressing elastic member121xand122x(not shown), the engaging elastic members and the pressing elastic member121xand122x(not shown) have a coupling inclination angle θ of less than 90 degrees, the relative planar position between the first case110B and the second case120B is regulated by the uneven regulating members118,128(seeFIG. 7B).

At least a pair of diagonal positions of the first case110B and the second case120B is provided with concavity part118and protruding part128to be engaged with each other. Further, the concavity part118and the protruding part128fitted to each other are the unevenly regulating members. As described above, according to the technical feature item4of this application, the diagonal positions of the first case and the second case are provided with concavity part118and protruding part128to be fitted to each other. Accordingly, when the first case110B is pressed in the planar direction by the plurality of engaging elastic members121a,121b,123a,123b, a shift occurs between the center position of the first case110B and the center position of the second case120B, by doing so, variations occur in the seal gap to which the adhesive sealant is applied, as a result, there is a feature that the reduction in the bonding strength between the first case and the second case can be suppressed beforehand.

This feature applies for the second embodiment in the same way.

In the drawings, the same reference numerals indicate the same or corresponding parts.

Although the present application is described above in terms of an exemplary embodiment, it should be understood that the various features, aspects and functionality described in the embodiment are not limited in their applicability to the particular embodiment with which they are described, but instead can be applied, alone or in various combinations to the embodiment. It is therefore understood that numerous modifications which have not been exemplified can be devised without departing from the scope of the present application. For example, at least one of the constituent components may be modified, added, or eliminated.

REFERENCE SIGNS LIST

100A100B Waterproof type substrate housing case,

126C Bottom part of the engaging part,

NS1Three-sided holding surfaces of the first case,

NS2Three-sided holding surfaces of the second case.