JP3706010B2 - Box for protecting electronic components - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a box body that protects electronic parts, and in particular, various sensors used for air fuel consumption control of an internal combustion engine, etc., and a box body that protects electronic parts for automobiles and electronic parts protected by the box body are used. It relates to the control system.
[0002]
[Prior art]
A circuit board mounted on a base member and protected by a separate part such as a housing member or a circuit cover, or a metal provided on the circuit board and the housing member for input / output of electrical signals inside or outside the housing member A box of an electronic component in which a terminal is connected by a metal wire is known from Japanese Patent Application Laid-Open No. 11-14423. Furthermore, it is a known technique to use depressions and projections of press fit dimensions for assembling the box.
[0003]
[Problems to be solved by the invention]
By the way, in the box body for protecting the electronic parts, even in an environment where the ambient temperature is easily changed such as an internal combustion engine, even if the metal wire is not easily deteriorated due to thermal distortion, and is composed of a plurality of parts, the accuracy can be improved. A box that can be assembled well is desired.
[0004]
However, in the above-described known technology, there is no description regarding the protection of the metal wire by the box, and there is no description that the durable life of the metal wire is extended by a simple uneven structure.
[0005]
Here, the following three conditions (1) to (3) must be satisfied in order to realize a box body in which the metal wire is not easily deteriorated due to thermal strain and can be assembled with high accuracy.
[0006]
(1) The structure is such that the two connection portions of the metal wire are not relatively displaced.
(2) Good assembly and accuracy of parts.
(3) The box is simple and has better durability than a metal wire.
[0007]
The object of the present invention is to satisfy the above three conditions, even in an environment such as an internal combustion engine where the ambient temperature is likely to change, even when the metal wire is not easily deteriorated due to thermal strain, and further comprises a plurality of parts. It is to realize a box that protects electronic components that can be assembled with high accuracy.
[0008]
In order to achieve the above object, the present invention is configured as follows.
(1) A base member that fixes the circuit board and a housing member that is bonded or welded to the base member and protects the circuit board from the interior are provided. In a box body that protects an electronic component in which a metal terminal for electrical connection and the circuit board are connected via another conductive member such as a metal wire, the base member and the housing member are bonded to each other. In the vicinity of the connection portion of the metal wire, both the base member and the housing member have press-fitting or uneven portions that are close to press-fitting, and mechanically connected to each other. Combined [0009]
(2) Preferably, in the above (1), the base member and the housing member are hermetically sealed after being joined, and the uneven portion is disposed at a position where the airtightness between the installation space of the circuit board and the outside is not impaired. Has been.
[0010]
(3) Preferably, in the above (1) or (2), the uneven portion provided on both the base member and the housing member is formed on the base member or the housing member according to the surrounding temperature change. Is a portion where the adhesive used for assembly is greatly deformed.
[0011]
(4) Preferably, in the above (1), (2), and (3), the uneven portion provided on both the base member and the housing member is wired near the heat generating portion on the circuit. This is the vicinity of the above-described metal wire or the like.
[0012]
(5) Preferably, in the above (1), (2), (3), and (4), the base member and the housing member are made of different materials, respectively, and the concavo-convex portion is the same as the base member. Of the housing member, a side made of a material having excellent mechanical strength was formed as a concave portion, and a side formed from a material inferior in mechanical strength was formed as a convex portion.
[0013]
(6) A base member that fixes the circuit board, a housing member that protects the circuit board from the interior, and a metal terminal that is provided on the housing member and electrically connects the inside and outside of the housing. The base member and the housing member are bonded to each other in the box that protects the electronic component connected to the circuit board from the circuit board via another conductive member such as a metal wire in at least two directions . In the vicinity of the metal terminal on the housing member connected to one direction of the circuit board with a metal wire, a groove is formed, and both the base member and the housing member are press-fitted, or a fit close to press-fitting, respectively. And have a concavo-convex portion to be bonded to each other.
[0015]
( 7 ) A sub air passage portion including a flow rate measuring portion made of a heat generating resistor and a circuit board for controlling the heating of the heat generating resistor, and a flange portion for mounting to the main air passage and input / output of electric signals The connector part for carrying out is integrated, the housing member which consists of a plastic material, the said subair passage, and the said housing member are fixed, it is the flat form which has mechanical strength, and it adheres or welds with the said housing member. A metal base member and a metal terminal provided on the housing member for electrically conducting the housing inside and outside, and the circuit board is connected via another conductive member such as a metal wire in the heating resistor type air flow rate measuring device comprising a protective housing body of the electronic component to be, together with the groove for the base member and the housing member to be bonded to each other are formed, Both the base member and the housing member are press-fitted in the vicinity of the metal terminal on the housing member connected to the part of the circuit board located near the auxiliary passage side and far from the flange portion and the metal wire, or It has an uneven part that fits close to press-fitting.
[0016]
( 8 ) A sub air passage portion including a flow rate measuring unit composed of a heating resistor, and a circuit board for controlling the heating of the heating resistor, and a flange portion for mounting on the main air passage and input / output of electric signals The connector part for carrying out is integrated, the housing member which consists of a plastic material, the said subair passage, and the said housing member are fixed, it is the flat form which has mechanical strength, and it adheres or welds with the said housing member. A metal base member and a metal terminal provided on the housing member for electrically conducting the housing inside and outside, and the circuit board is connected via another conductive member such as a metal wire in the heating resistor type air flow rate measuring device comprising a protective housing body of the electronic component to be, together with the groove for the base member and the housing member to be bonded to each other are formed, In the vicinity of the metal terminal on the housing member connected by the metal wire to the portion of the circuit board located on the sub-passage side, both the base member and the housing member are respectively press-fitted or uneven portions that fit close to press-fitting. have.
[0017]
(9) Preferably, the Oite to (6), the length of the metal wire for connecting the metal terminal on the far point from the circuit board and the uneven portion is, the circuit board and the uneven portion near the metal Longer than the metal wire connecting the terminal.
[0018]
( 10 ) Preferably, in ( 9 ) above, the metal wire connecting the metal terminal and the circuit board located far from the uneven portion is close to the center of the circuit board in the circuit board. Connected to position.
[0019]
( 11 ) Preferably, in the above ( 10 ), a chip component or a printed resistor arranged on the circuit board is laid out between the metal wire and the circuit board.
[0020]
( 12 ) Preferably, in the box for protecting the electronic component according to any one of (1) to ( 6 ), ( 9) ) to ( 11 ), the base member is a metal material, a housing A box for protecting an electronic component, characterized in that the member has a material mainly composed of resin.
[0021]
( 13 ) Preferably, in the box for protecting an electronic component according to any one of (1) to (4), ( 6), and (9) to (12) , the uneven portion is A concave shape is formed on the base member side, and a convex shape is formed on the housing member side.
[0022]
( 14 ) Preferably, in the above (1) to (4), the concavo-convex portion has a concave shape on the base member side and a convex shape on the housing member side.
[0023]
( 15 ) A control device for an internal combustion engine that controls the fuel injection amount to the internal combustion engine and the air flow rate based on the engine rotation speed signal and the air flow rate signal to the internal combustion engine from the heating resistance type air flow measurement device The heating resistance type air flow rate measuring device includes a sub air passage portion including a flow rate measuring portion made of a heating resistor, and a circuit board for controlling the heating of the heating resistor, and is attached to the main air passage. The flange part and the connector part for inputting and outputting electric signals are integrated, and the housing member made of plastic material, the sub air passage and the housing member are fixed, and has a flat plate shape having mechanical strength, A metal base member that is bonded or welded to the housing member; and a metal terminal that is provided on the housing member and electrically connects the inside and outside of the housing. , Comprising a protective housing body of the electronic component in which the circuit board is connected via a separate electrically conductive member such as metal wire, with a groove for the base member and the housing member to be bonded to each other are formed, In the vicinity of the metal terminal on the housing member connected to the portion of the circuit board located on the side of the sub-passage and the metal wire, both the base member and the housing member are press-fitted, or uneven portions that fit close to press-fitting. have.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic cross-sectional view showing a first embodiment of a box body for protecting an electronic component according to the present invention, which is applied to a heating resistance type air flow measuring device. FIG. 2 is a side view of the circuit module of FIG. 1 viewed from the P direction shown in FIG.
In FIG. 1 and FIG. 2, a heating resistor 1 for detecting the flow rate of fluid and a temperature sensitive resistor 2 for detecting the temperature of intake air and performing temperature compensation are fixed to a terminal member 3, and an aluminum wire 4 Thus, the circuit board 5 is electrically connected.
[0025]
Further, the circuit board 5 and the input / output terminal 6 for electrical signals are also connected by the aluminum wire 4, and the terminal member 3 and the input / output terminal 6 are held by the housing member 7.
[0026]
In addition, the circuit board 5 and the base member 8, the base member 8 and the housing member 7, and the housing member 7 and the circuit cover 9 are fixed with an adhesive to constitute a heating resistance type air flow measuring device. It is used by being inserted into this passage 10 from a hole provided in the main passage 10 or the like.
In addition to the heating resistance type air flow measurement device listed here, various electronic components such as various control sensors installed in the engine room of an automobile are required to have a capability to withstand a temperature environment of -40 ° C to 130 ° C. Yes.
[0027]
For example, when the bonding connection by the aluminum wire 4 is performed as in the air flow rate measuring device, the problem that the wire 4 itself deteriorates due to the cooling / heating cycle must be solved.
Here, the mechanism of deterioration of the aluminum wire 4 will be described.
Due to the cooling / heating cycle, the resin constituting the housing member 7 undergoes thermal expansion and contraction. However, since the base member 8 is configured as a separate part or material, the housing member 7 and the base member 8 are repeatedly displaced in different directions.
[0028]
That is, the aluminum wire 4 that connects the circuit board 5 on the base member 8 and the housing member 7 repeatedly expands and contracts, resulting in thermal distortion. If this cooling and heating cycle is repeated several hundreds of times, the wire 4 itself is wrinkled, and when the deterioration progresses, in the worst case, the wire 4 is broken.
For this reason, when mounting | wearing in places with severe temperature environments, such as the inside of the engine room of a motor vehicle, the device which suppresses the thermal displacement between the housing member 7 and the base member 8 is calculated | required.
Therefore, in the example shown in FIG. 1, the press-fit pin 11 is formed on the housing member 7 side, and the press-fit hole 12 into which the press-fit pin 11 is inserted is formed on the base member 8 side.
[0029]
In general, when temperature changes, expansion and contraction occur near the center of the part. In the case of the example of FIG. 1, the aluminum wire 4 located on the lower side, that is, farther from the center of the housing member 7. A press-fit pin 11 and a press-fit hole 12 were formed in the vicinity.
[0030]
That is, the position where the press-fit pin 11 and the press-fit hole 12 are formed is a position where deterioration of the aluminum wire 4 becomes a problem.
[0031]
With this configuration, thermal displacement between the housing member 7 and the base member 8 is suppressed, and fluctuations in the distance between the circuit board 5 and the terminal member 3 are suppressed, thereby suppressing thermal displacement, that is, deterioration of the aluminum wire 4. It becomes possible.
Further, the installation of the press-fit pin 11 and the press-fit hole 12 improves the assembling property and the assembling accuracy of the parts. That is, since the pin 11 and the hole 12 have a press-fit structure, the housing member 7 and the base member 8 can be fixed (mechanically coupled) to each other. In addition, when both are bonded, an ideal post-assembly posture can be maintained during conveyance until the adhesive is cured.
As described above, according to the first embodiment of the present invention, the press-fit pin 11 is formed on the housing member 7 side, and the press-fit hole 12 into which the press-fit pin 11 is inserted is formed on the base member 8 side. Deterioration of the aluminum wire 4 can be suppressed, and even in an environment such as an internal combustion engine where the ambient temperature is likely to change, the metal wire is not easily deteriorated due to thermal distortion, and even when it is composed of a plurality of parts, it is accurate. There is an effect that it is possible to realize a box body and a heating resistance type air flow rate measuring device that protects electronic components that can be assembled.
FIG. 3 is a schematic sectional view showing a second embodiment of the present invention.
In FIG. 3, the housing member 7 and the base member 8 have an adhesive structure 13 for assembling with each other with an adhesive, and the circuit cover 5 is further adhered to the housing member 7 to install the circuit board 5. The space is sealed.
[0032]
However, if the press-fit pin 11 and the press-fit hole 12 are formed inside the adhesive structure 13, that is, the side where the circuit board 5 is arranged, a gap is formed between the press-fit pin 11 and the press-fit hole 12, and the circuit board is formed. Since the space where 5 is disposed cannot be completely sealed, the circuit board 5 may be corroded due to the invasion of corrosive gas.
[0033]
Therefore, by forming the press-fit pins 11 and the press-fit holes 12 outside the bonding structure 13, the airtightness between the installation space of the circuit board 5 and the outside is ensured.
[0034]
As described above, according to the second embodiment of the present invention, the same effect as that of the first embodiment can be obtained, and the airtightness between the installation space of the circuit board 5 and the outside is ensured, and corrosion is prevented. It is possible to prevent the circuit board 5 from being corroded or the like due to the invasion of the property gas.
FIG. 4 is a schematic side view showing a third embodiment of the present invention and a cross-sectional view taken along line AA of this side view.
In general, a wire wired near a component that generates heat at a high temperature has a larger thermal history than other wires, and thus is greatly affected by thermal distortion. For this reason, the formation position of the press-fit pin 11 and the press-fit hole 12 is set in the vicinity of the aluminum wire 4 wired in the vicinity of the heat generating component 14 mounted on the circuit board 5.
[0035]
Other configurations are the same as those of the second embodiment shown in FIG.
[0036]
As described above, according to the third embodiment of the present invention, the same effect as that of the second embodiment can be obtained, and the effect of the substrate-side heating element can be suppressed.
FIG. 5 is a schematic sectional view showing a fourth embodiment of the present invention.
If the housing member 7 is a resin molded product and the base member 8 is an aluminum press-molded product, both of them are molded with materials having different mechanical strengths. If the press-fit pin is molded with resin, depending on the installation position and quantity of the pin, The pin breaks during the cold cycle.
[0037]
Therefore, as shown in FIG. 5, the metal press-fit pin 15 is formed on the base member 8 side, and the hole into which the metal press-fit pin 15 is inserted is formed on the housing member 7 side to prevent breakage of the press-fit pin.
[0038]
Other configurations are the same as those of the second embodiment shown in FIG.
[0039]
As described above, according to the fourth embodiment of the present invention, the same effect as that of the second embodiment can be obtained, and the press-fit pin can be prevented from being broken.
FIG. 6 is a schematic sectional view showing a fifth embodiment of the present invention.
As described above, in general, when a temperature change occurs, expansion and contraction occur near the center of the part, so that the end of the part is more thermally deformed.
[0040]
For this reason, in the case of the fifth embodiment of the present invention shown in FIG. 6, the metal press-fit pin 15 or the press-fit pin 11 is formed in the vicinity of the aluminum wire 4 at a position farther from the center of the housing member 7. Further, in the case where the flange 19 is integrally formed with the housing member 7, when the main passage 10 and the flange 19 are fixed by screwing or the like, a portion of the housing member 7 far from the flange 19 is most thermally deformed.
[0041]
For this reason, in the example of FIG. 6, the metal press-fit pin 15, the press-fit pin 11, or the like is formed in the vicinity of the aluminum wire 4 farther from the flange 19. Other configurations are the same as those of the second embodiment shown in FIG.
[0042]
As described above, according to the fifth embodiment of the present invention, the same effect as that of the fourth embodiment can be obtained, and the distance between the terminal member 3 disposed in the circuit board 5 and the auxiliary air passage 18 can be obtained. Is maintained, and it is possible to suppress thermal displacement, that is, deterioration of the aluminum wire 4.
FIG. 7: is the schematic side view which shows the 6th Embodiment of this invention, and sectional drawing along the BB line of this side view.
When the housing member 7 is molded from resin and the base member 8 is molded from aluminum, both of which are molded from materials with different mechanical strengths, as described above, when the press-fit pin 11 is molded from resin, the pins are installed. Depending on the position and quantity, the pin breaks during the cooling cycle.
For this reason, in the sixth embodiment, the resin press-fit pins 11 are arranged only at the positions where the deterioration of the aluminum wire 4 is most problematic, thereby preventing the pins from being broken. However, at this time, the durability of the aluminum wire 4 wired on the side where the press-fit pin 11 is not formed may be a problem.
[0043]
Therefore, for the aluminum wire 4 wired on the side where the press-fit pin 11 is not installed, the wire connecting portion is moved to the center portion of the circuit board 5 to make the length of the aluminum wire 4 longer.
With this configuration, the long wire 4-2 can be prevented from being deteriorated by relatively reducing the strain amount, and the short wire 4-1 can be prevented from being deteriorated by the press-fitting structure. Further, since the length of the wire 4 can be increased without increasing the size of the housing member 7 and the number of press-fit pins 11 and press-fit holes 12 can be minimized, the entire electronic component can be made compact. become.
[0044]
Other configurations are the same as the example shown in FIG.
[0045]
As described above, according to the sixth embodiment of the present invention, the same effect as that of the second embodiment can be obtained, the distance between the circuit board 5 and the terminal member 3 is maintained, and thermal displacement, that is, There is an effect that the deterioration of the aluminum wire 4 can be suppressed.
[0046]
FIG. 8 is a schematic side view and a partially enlarged view showing a seventh embodiment of the present invention.
In FIG. 8, in order to make the length of the aluminum wire 4 longer, the connecting portion of the aluminum wire 4 is moved to the center of the circuit board 5, and the resistor 16, the chip component 17, etc. constituting the circuit are connected to the aluminum wire 4. It is placed under the loop. That is, a chip component 17 or a printed resistor disposed on the circuit board 5 is laid out between the aluminum wire 4 that is a metal wire and the circuit board 5.
[0047]
With this configuration, the pattern layout space of the substrate can be used effectively, and the entire electronic component can be made compact.
Other configurations are the same as the example shown in FIG.
[0048]
As described above, according to the sixth embodiment of the present invention, the same effects as those of the second embodiment can be obtained, the pattern layout space of the substrate can be used effectively, and the entire electronic component can be made compact. Is effective.
FIG. 9 is a diagram showing an eighth embodiment of the present invention, which is an example in the case of being applied to an electronic fuel injection type internal combustion engine control system as a heating resistance type air flow rate measuring device.
In FIG. 9, the intake air 52 drawn from the air cleaner 51 is drawn into the engine cylinder 57 via an intake manifold 56 having an intake duct 53, a throttle body 54, and an injector 55 to which fuel is supplied. On the other hand, the gas 58 generated in the engine cylinder is discharged through the exhaust manifold 59.
[0049]
An air flow signal and pressure signal output from the circuit module 60 of the heating resistance type air flow measuring device, an intake air temperature signal from the intake temperature sensor 61, a throttle valve angle signal output from the throttle angle sensor 62, and an exhaust manifold 59 The control unit 65 that inputs the oxygen concentration signal output from the provided oxygen concentration meter 63 and the engine rotation speed signal output from the engine rotation speed meter 64, etc., sequentially calculates these signals to obtain the optimum fuel. The injection amount and the idle air control valve opening are obtained, and the injector 55 and the idle control valve 66 are controlled using the values.
[0050]
As described above, according to the eighth embodiment of the present invention, any one of the above-described first to seventh embodiments of the present invention is used as the circuit module 60 of the heating resistance type air flow rate measuring device. A box that protects electronic components can be assembled with high accuracy even when the metal wire is not easily deteriorated due to thermal distortion and is composed of multiple components. The control system of the internal combustion engine provided with the heating resistance type air flow measuring device having the body can be realized.
[0051]
FIG. 10 is a graph comparing the bonding wire strength when the box structure protecting the electronic component according to the present invention is used and the bonding wire strength when using the box structure protecting the electronic component according to the prior art. is there. In this graph, the vertical axis represents the strength of the bonding wire, and the horizontal axis represents the number of thermal cycles.
[0052]
As test conditions, 300 μm aluminum wire was used, and −40 ° C. and 130 ° C. were repeated for 30 minutes each. In FIG. 10, black circles indicate the present invention, and black triangles indicate the prior art.
[0053]
The allowable deterioration range is up to 250 kgf when 350 kgf is the initial strength. In the prior art, the cold cycle is about 300, which is outside the allowable range, and when the cycle is 1000 cycles or more, the strength becomes zero.
[0054]
On the other hand, the thing of this invention was able to maintain required intensity | strength even in 3000 cycles.
[0055]
As can be seen from the test results shown in FIG. 10, according to the present invention, the strength of the bonding wire is remarkably improved as compared with the prior art.
[0056]
【The invention's effect】
As described above, according to the present invention, even in an environment such as an internal combustion engine where the ambient temperature is likely to change, the metal wire is not easily deteriorated due to thermal strain, and even when it is composed of a plurality of parts, the accuracy is high. A box body that protects electronic components that can be assembled can be realized.
[0057]
That is, the following effects (1) to (3) can be obtained.
(1) By providing the press-fitting tolerance irregularities in the vicinity of the metal wire, the distance between the circuit board and the terminal member can be maintained, and thermal displacement between components, that is, deterioration of the metal wire can be suppressed.
[0058]
(2) By providing the press-fitting tolerance irregularities in the vicinity of the metal wire, assembly variations can be reduced when parts are fitted on the production line, and when both are bonded, transport until the adhesive is cured. Sometimes the ideal post-assembly posture can be maintained.
[0059]
(3) As for the metal wire wired on the side where the unevenness portion is not provided and the unevenness portion of the press-fitting tolerance is provided at the position where the deterioration of the metal wire is most problematic, the wire connection portion is the center of the circuit board. By moving to the part and configuring the wire length to be long, the durability of all the metal wires wired to the electronic component can be ensured, and further downsizing of the electronic component can be achieved.
[0060]
Further, according to the present invention, even in an environment where the ambient temperature is easily changed, such as an internal combustion engine, the metal wire is not easily deteriorated due to thermal distortion, and can be assembled with high accuracy even when it is composed of a plurality of parts. A heating resistance type air flow rate measuring device having a box for protecting electronic components can be realized.
[0061]
Further, it is possible to realize an internal combustion engine control system including the heating resistance type air flow rate measuring device.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention.
FIG. 2 is a side view of the circuit module of FIG. 1 viewed from the P direction.
FIG. 3 is a schematic cross-sectional view showing a second embodiment of the present invention.
FIGS. 4A and 4B are a schematic side view and a cross-sectional view showing a third embodiment of the present invention. FIGS.
FIG. 5 is a schematic sectional view showing a fourth embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view showing a fifth embodiment of the present invention.
7A and 7B are a schematic side view and a cross-sectional view showing a sixth embodiment of the present invention.
FIG. 8 is a schematic side view and a partially enlarged view showing a seventh embodiment of the present invention.
FIG. 9 is a schematic front view showing an eighth embodiment of the present invention.
FIG. 10 is a graph comparing the present invention with the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heating resistor 2 Temperature sensitive resistor 3 Terminal member 4 Aluminum wire 5 Circuit board 6 Input / output terminal 7 Housing member 8 Base member 9 Circuit cover 10 Main passage 11 Press-fitting pin 12 Press-fitting hole 13 Adhesive groove 14 Heating component 15 Metal press-fitting pin 16 Resistor 17 Chip part 18 Sub air passage 19 Flange 51 Air cleaner 52 Intake air 53 Intake duct 54 Throttle body 55 Injector 56 Intake manifold 57 Engine cylinder 58 Gas 59 Exhaust manifold 60 Circuit module 61 Intake temperature sensor 62 Throttle angle sensor 63 Oxygen concentration Total 64 Tachometer 65 Control unit 66 Idle air control valve

Claims (15)

A base member that fixes the circuit board and a housing member that is bonded or welded to the base member and protects the circuit board from the interior are provided to electrically connect the inside and outside of the housing provided on the housing member. In a box that protects an electronic component in which a metal terminal for the circuit board and the circuit board are connected via another conductive member such as a metal wire,
A groove for bonding the base member and the housing member to each other is formed, and both the base member and the housing member are press-fitted or fitted close to press-fitting in the vicinity of the connection portion of the metal wire. A box body for protecting an electronic component, wherein the electronic component has an uneven portion and is mechanically coupled to each other.   2. The box body for protecting an electronic component according to claim 1, wherein the base member and the housing member have airtightness after being joined, and the uneven portion does not impair the airtightness between the installation space of the circuit board and the outside. A box body for protecting an electronic component characterized by being arranged in   3. A box body for protecting an electronic component according to claim 1 or 2, wherein the uneven portions provided on both the base member and the housing member are formed according to a change in ambient temperature. A box body for protecting an electronic component, characterized in that it is a portion of a portion where an adhesive or the like used in the process is greatly deformed.   The box for protecting the electronic component according to any one of claims 1, 2, and 3, wherein the uneven portion provided on both the base member and the housing member is a heating portion on the circuit. A box for protecting an electronic component, characterized by being in the vicinity of the metal wire or the like wired in the vicinity.   The box body protecting the electronic component according to any one of claims 1, 2, 3, and 4, wherein the base member and the housing member are made of different materials, respectively, and the uneven portion includes the base member. A box body for protecting an electronic component characterized in that a side made of a material having excellent mechanical strength is formed as a concave portion and a side made of a material inferior in mechanical strength is formed as a convex portion. . A base member for fixing the circuit board; a housing member for protecting the interior of the circuit board; and a metal terminal provided in the housing member for electrically conducting the interior and exterior of the housing. In a box that protects an electronic component that is connected from a substrate via another conductive member such as a metal wire in at least two directions,
The base member and the housing member are formed with a groove for bonding to each other, and the base member and the housing member are disposed in the vicinity of the metal terminal on the housing member connected to the circuit board in one direction with a metal wire. A box body for protecting an electronic component, characterized in that both have press-fitting or uneven portions that fit close to press-fitting and are connected to each other. A sub-air passage section with a built-in flow rate measuring unit composed of a heating resistor and a circuit board for controlling the heating of the heating resistor are included, and a flange section for mounting to the main air path and an electrical signal input / output A metal base member in which a connector part is integrated, a housing member made of a plastic material, the sub air passage and the housing member are fixed, is a flat plate having mechanical strength, and is bonded or welded to the housing member And a metal terminal that is provided in the housing member and electrically connects the inside and outside of the housing, and the circuit board is connected via another conductive member such as a metal wire. In the heating resistance type air flow measuring device equipped with a protective box for the parts,
The base member and the housing member are formed with a groove for bonding to each other, and the housing member is connected to a part of the circuit board located near the sub-passage side and farther from the flange portion by the metal wire. In the vicinity of the upper metal terminal, both of the base member and the housing member have press-fitting or uneven portions that fit close to the press-fitting. A sub-air passage section with a built-in flow rate measuring unit composed of a heating resistor and a circuit board for controlling the heating of the heating resistor are included, and a flange section for mounting to the main air path and an electrical signal input / output A metal base member in which a connector part is integrated, a housing member made of a plastic material, the sub air passage and the housing member are fixed, is a flat plate having mechanical strength, and is bonded or welded to the housing member And a metal terminal that is provided in the housing member and electrically connects the inside and outside of the housing, and the circuit board is connected via another conductive member such as a metal wire. In the heating resistance type air flow measuring device equipped with a protective box for the parts,
The base member and the housing member are formed with a groove for bonding to each other, and the base member is located in the vicinity of the metal terminal on the housing member connected to the portion of the circuit board located on the side of the sub passage and the metal wire. Both of the member and the housing member are press-fitted or have an uneven portion that fits close to the press-fitting. In the box to protect the electronic component according to claim 6 Symbol mounting, the length of the metallic wire that connects the metal terminal on the far point from the circuit board and the uneven portion is, the circuit board and the uneven portion in the vicinity A box for protecting an electronic component, characterized by being longer than a metal wire connecting a metal terminal. 10. The box body for protecting an electronic component according to claim 9, wherein the metal wire connecting the metal terminal and the circuit board at a location far from the uneven portion is near the center of the circuit board in the circuit board. A box body for protecting an electronic component characterized by being connected to a position. 11. A box for protecting an electronic component according to claim 10 , wherein a chip component or a printed resistor disposed on the circuit board is laid out between the metal wire and the circuit board. A box that protects electronic components. The box body for protecting an electronic component according to any one of claims 1 to 6 and claims 9 to 11 , wherein the base member has a metal material and the housing member has a material mainly made of resin. A box that protects the electronic components. The box for protecting an electronic component according to any one of claims 1 to 4, claim 6, and claim 9 to 12 , wherein the concave and convex portion has a concave shape on the base member side, and a housing member A box for protecting an electronic component, wherein a convex shape is formed on the side.   5. The box body for protecting an electronic component according to claim 1, wherein the concavo-convex portion has a concave shape on the base member side and a convex shape on the housing member side. A box that protects electronic components. In a control device for an internal combustion engine that controls the fuel injection amount and the air flow rate to the internal combustion engine based on the engine rotation speed signal and the air flow rate signal to the internal combustion engine from the heating resistance type air flow measurement device,
The heating resistance type air flow rate measuring device includes a sub air passage portion including a flow rate measuring portion including a heating resistor, and a flange portion for mounting the heating resistor on a circuit board for controlling heating of the heating resistor. And a connector part for inputting and outputting electrical signals, a housing member made of a plastic material, the sub-air passage and the housing member are fixed, and is a flat plate having mechanical strength, and the housing A metal base member that is bonded or welded to the member, and a metal terminal that is provided on the housing member and electrically connects the inside and outside of the housing, and the circuit board is conductive such as a metal wire. another member comprises a protective box body of the electronic component connected via, with grooves for the base member and the housing member to be bonded to each other are formed, the sub passage In the vicinity of the metal terminal on the housing member connected with the portion of the circuit board located at the metal wire, both the base member and the housing member have a concavo-convex portion that is press-fitted or fits close to press-fitting. A control device for an internal combustion engine.

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