Electronic device

An electronic device includes a press-fit terminal, an electronic component and a substrate. The substrate includes a first through hole, a second through hole and an inlay. The press-fit terminal is press-fitted in the first through hole. The second through hole is located between the first through hole and a part of the substrate at which the electronic component is mounted. The inlay is made of a metal material and press-fitted in the second through hole. The inlay restricts a strain in the substrate and restricts decrease of a holding force of the substrate holding the press-fit terminal.

CROSS REFERENCE TO RELATED APPLICATION

This application is based on Japanese Patent Application No. 2016-251789 filed on Dec. 26, 2016, the disclosure of which is incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to an electronic device that includes a substrate having a through hole and a press-fit terminal press-fitted in the through hole.

BACKGROUND

JP 2009-289447 A discloses an electronic device that includes a substrate having a through hole and a press-fit terminal press-fitted in the through hole. The electronic device includes multiple press-fit terminals. The substrate has multiple through holes corresponding to the multiple press-fit terminals. The substrate has dummy holes between neighboring through holes and the press-fit terminals are not press-fitted in the dummy holes.

SUMMARY

The press-fit terminal is press-fitted in the through hole and applies a reaction force of elastic deformation to a wall surface of the through hole. As such, the press-fit terminal is held by the substrate. When the press-fit terminal is press-fitted into the through hole, the through hole is deformed and a strain is generated in the substrate.

The dummy hole restricts the strain in the substrate. However, depending on usage environment, the dummy hole is deformed by a reaction force of elastic deformation and the above described reaction force of the press-fit terminal is reduced. That is, a holding force of the substrate holding the press-fit terminal is reduced.

It is an object of the present disclosure to provide an electronic device capable of restricting a strain in a substrate while restricting decrease of a holding force of the substrate holding a press-fit terminal.

According to an aspect of the present disclosure, an electronic device includes a press-fit terminal, an electronic component and a substrate. The substrate includes a first through hole, a second through hole and an inlay. The press-fit terminal is press-fitted in the first through hole. The second through hole is located between the first through hole and a part of the substrate at which the electronic component is mounted. The inlay is made of a metal material and press-fitted in the second through hole.

According to another aspect of the present disclosure, an electronic device includes a press-fit terminal and a substrate. The substrate includes a first through hole, a wiring, a second through hole and an inlay. The press-fit terminal is press-fitted in the first through hole. The second through hole is located between the first through hole and the wiring. The inlay is made of a metal material and press-fitted in the second through hole.

According to further another aspect of the present disclosure, an electronic device includes a press-fit terminal and a substrate. The substrate includes a first through hole, a second through hole and an inlay. The press-fit terminal is press-fitted in the first through hole. The inlay is made of a metal material and press-fitted in the second through hole. The inlay is lined up with the first through hole in an elastic direction of elastic deformation of the press-fit terminal.

According to the above aspects of the present disclosure, the inlay is press-fitted in the second through hole of the substrate. The inlay is less likely to be deformed. Therefore, the inlay restricts a strain in the substrate generated when the press-fit terminal is press-fitted into the first through hole. According to the above aspects of the present disclosure, differently from the conventional art, the dummy hole is not provided. Therefore, decrease of the holding force of the substrate holding the press-fit terminal is restricted.

DETAILED DESCRIPTION

Embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, portions functionally and/or structurally corresponding to each other will be designated with the same symbols. Hereinafter, a thickness direction of a substrate is referred to as Z direction. A direction orthogonal to the Z direction and corresponding to a width direction of a press-fit terminal is referred to as X direction. A direction orthogonal to the Z direction and the X direction is referred to as Y direction. Unless otherwise noted, a planar shape is a shape of a plane viewed in the Z direction (i.e., a shape of a plane extending along XY plane).

First Embodiment

First, a schematic structure of an electronic device according to a first embodiment will be described with reference toFIG. 1andFIG. 2.

An electronic device10shown inFIG. 1is an electronic control unit (ECU) controlling a vehicle. For example, the electronic device10is an engine ECU. The electronic device10includes an enclosure20, a substrate30, electronic components40and a connector50.

The enclosure20accommodates the substrate30and the electronic components40to protect the substrate30and the electronic components40. For example, the enclosure20is made of a metal material such as aluminum or iron in order to improve heat dissipation performance of heat generated in the electronic components40. For example, the enclosure20is made of resin material in order to reduce a weight of the electronic device10.

In the present embodiment, the enclosure20includes two members divided in the Z direction, that is, a case200and a cover201. The case200is made of resin material and the cover201is made of material including aluminum. The enclosure20is provided by assembling the case200and the cover201in the Z direction. The case200has a box shape and one surface of the case200has an opening. The cover201occludes the opening of the case200. A method for assembling the case200and the cover201is not especially limited. Well-known methods such as screw fixing or engagement may be employed.

The substrate30is a so-called printed substrate. The substrate30includes a base300and wirings arranged on the base300. The base300is made of an electrical insulation material such as resin. InFIG. 1, illustrations of the wirings are omitted.FIG. 2shows a land of the wirings of the substrate30employed for external connections. The substrate30is fixed to the enclosure20by well-known fixing methods such as screw fixing or adhesion.

As shown inFIG. 2, the substrate30has a first through hole301and a second through hole302. The first through hole301and the second through hole302penetrate the substrate30in the Z direction corresponding to a thickness direction of the substrate30. The first through hole301and the second through hole302have almost planar exact circle shape. The first through hole301is a hole in which a press-fit terminal501, which will be described later, is inserted. The first through hole301may be referred to as a through hole. Both the first through hole301and the second through hole302have openings at a first surface30aand a second surface30bopposite to the first surface30aof the substrate30.

The substrate30has surface lands303and a through hole land304as the land. The surface lands303are formed on at least one of the first surface30aand the second surface30b. The through hole land304is formed on a wall surface of the first through hole301. The through hole land304is integrally formed on the wall surface of the first through hole301and on a periphery of each opening of the first through hole301at the first surface30aand the second surface30b. That is, the through hole land304includes a wall portion formed on the wall surface of the first through hole301and a periphery portion formed on the periphery of each opening of the first through hole301. The through hole land304is formed of a plating film. The through hole land304may be referred to as a through hole plating. The substrate30has the wirings other than the through hole land304only on the first surface30aand the second surface30b. That is, the substrate30is a double-sided wiring substrate without inner wirings (in other words, two-layer substrate).

The substrate30further includes an inlay305. The inlay305is press-fitted in the second through hole302and held by the substrate30. For example, the inlay305is press-fitted in the second through hole302by inserting the inlay305into the second through hole302, and then pressurizing the inlay305by a pressing machine to enlarge a diameter of the inlay305. The inlay305is made of a metal material having good heat conductivity such as copper. Therefore, the inlay305may be referred to as a metal member or a metal pin. In the present embodiment, the inlay305has a cylindrical shape. An entire length of the inlay305is almost the same as the thickness of the substrate30. A first end face305aof the inlay305is almost the same plane as the first surface30aof the substrate30. A second end face305bof the inlay305is almost the same plane as the second surface30bof the substrate. In other words, the first end face305ais a part of the first surface30aand the second end face305bis a part of the second surface30b. The first end face305aand the second end face305bare exposed surfaces.

The electronic components40are mounted on the substrate30. The electronic components40provide circuits with the wirings formed on the substrate30. The substrate30on which the electronic components40are mounted is a circuit board. The electronic components40are surface-mount-type components. The electronic components40are connected to the surface lands303through solders41.

The connector50electrically connects the circuits provided by the wirings of the substrate30and the electronic components40to external devices. The connector50includes a housing500and multiple terminals. In the present embodiment, the press-fit terminal501is employed as the terminals. The housing500is formed of resin material. In the present embodiment, the housing500is integrally formed with the case200. However, the housing500of the connector50may be separated from the case200.

The press-fit terminal501is held by the housing500, for example, by press-fitting or insert-molding. Multiple press-fit terminals501are arranged in the Y direction. Each of the press-fit terminals501is respectively press-fitted into the first through hole301. As such, the press-fit terminal501is held by the substrate30. The press-fit terminal501is in contact with the through hole land304and presses the through hole land304. The press-fit terminal501is inserted into the first through hole301from the first surface30aof the substrate30.

For example, the press-fit terminal501is formed by plating a metal base. For example, copper alloy such as phosphor bronze or copper are employed as the metal base. The metal base is formed by punching a metal plate. The press-fit terminal501includes an elastic part501a, a front-end part501band a rear-end part501c.

The elastic part501ahas elasticity in an elastic direction orthogonal to the Z direction corresponding to an insertion direction in which the press-fit terminal501is inserted into the first through hole301. In the present embodiment, a thickness direction of the metal base corresponds to the Y direction and the elastic part501ahas elasticity in the X direction. At least a part of the elastic part501ais located in the first through hole301. The elastic part501aapplies a reaction force of elastic deformation, that is, a spring reaction force of the elastic part501ato the wall surface of the first through hole301. The front-end part501bextends from the elastic part501aand defines a front-end of the press-fit terminal501in the insertion direction. At least a part of the front-end part501bprotrudes from the second surface30bof the substrate30. The rear-end part501cextends from the elastic part501ain the insertion direction opposite to the front-end part501b, that is, toward the housing500.

In the present embodiment, the press-fit terminal501has a so-called needle-eye shape. The press-fit terminal501further includes an opening part501da part of which is held in the first through hole301. The opening part501dis a through hole that penetrates the metal base in the thickness direction of the metal base, i.e., Y direction. The opening part501dhas a long shape extending in the Z direction.

The press-fit terminal501is divided into a pair of beams by the opening part501d. The maximum distance in the X direction between external surfaces of the pair of beams is greater than the inner diameter of the first through hole301before the press-fit terminal501is inserted into the first through hole301. The distance in the X direction between the external surfaces of the pair of beams is increased from the rear-end part501ctoward middle of the elastic part501aand decreased from the middle of the elastic part501atowards the front-end part501b. The elastic part501aincludes the pair of beams. The elastic part501ais a portion around the opening part501d. The elastic part501ais elastically deformable when the press-fit terminal501is inserted into the first through hole301.

Next, structures around the inlay305will be described with reference toFIG. 2andFIG. 3. In order to clarify an elastic direction of the elastic deformation of the press-fit terminal501,FIG. 3shows a cross-section along the XY plane of the elastic part501alocated in the first through hole301.

As shown inFIG. 2andFIG. 3, each of the electronic components40is mounted on the substrate30near the first through hole301in which the press-fit terminal501is press-fitted. In other words, the surface land303, which is a part of the wirings, is arranged near the first through hole301. In the present embodiment, the substrate30is the double-sided wiring substrate and the shortest distance from a center of the first through hole301to the surface land303is several millimeters (e.g., 5 mm).

The second through hole302is formed between the first through hole301and a mounted region of the electronic component40. Specifically, the mounted region of the electronic component40is a part of the substrate30at which the electronic component40is mounted. The mounted region of the electronic component40includes a region corresponding to the electronic component40projected in the Z direction and a region at which the surface land303is formed. That is, the inlay305is located between the first through hole301and the mounted region of the electronic component40in the substrate30. In the XY plane, at least a part of the inlay305is located within a region between two virtual lines (which are shown by broken lines inFIG. 3) connecting the center of the first through hole301and the mounted region of the electronic component40.

Especially, in the present embodiment, the inlay305is located between the first through hole301and the mounted region of the electronic component40in the X direction corresponding to the elastic direction of the elastic deformation of the press-fit terminal501. The inlay305is located between the first through hole301and the mounted region of the electronic component40lined up with the first through hole301in the X direction. When the press-fit terminal501is press-fitted into the first through hole301, elastic deformation in the X direction occurs in the elastic part501aof the press-fit terminal501. In this case, as shown by a white arrow A inFIG. 3, a stress (i.e., compression stress) generated by the press-fitting of the press-fit terminal501is applied to the substrate30mainly in the X direction. The inlay305is lined up with the first through hole301in a direction in which the stress is applied, more specifically, in a direction of stress-applied-line in which the maximum stress is applied.

As shown inFIG. 3, multiple press-fit terminals501are arranged in the Y direction. Each of the press-fit terminals501has the elastic direction of elastic deformation in the X direction. Each inlay305is not located between the first through holes301adjoining in the Y direction. Each inlay305is located between the first through hole301and the electronic component40.

Next, effects of the above described electronic device10will be described.

In the present embodiment, the electronic component40is mounted near the first through hole301in which the press-fit terminal501is press-fitted, and the second through hole302is formed between the electronic component40and the first through hole301. The inlay305is press-fitted in the second through hole302. The inlay305is formed of the metal material and less likely to be deformed than the base300providing the substrate30. Therefore, when the press-fit terminal501is press-fitted into the first through hole301, the inlay305is not deformed, while the first through hole301is deformed by the stress and the strain is generated in the substrate30.

The strain is not generated at a portion of the substrate30farther from the first through hole301than the inlay305in the direction in which the first through hole301and the inlay305are lined up. Accordingly, the inlay305restricts the strain in the substrate30. In other words, the stress applied to the substrate30by the press-fitting of the press-fit terminal501is blocked by the inlay305. Therefore, the inlay305restricts a situation that the stress is applied to a connection portion of the electronic component40and the surface land303and connection reliability of the electronic component40is reduced.

As a result, the electronic component40may be located near the first through hole301. That is, the substrate30is miniaturized by reducing a prohibition region at which the electronic component40is not mounted. For example, when a chip capacitor is located near the first through hole301as the electronic component40, effect of reducing noise is enhanced.

Especially, in the present embodiment, the substrate30is the double-sided wiring substrate and the inner wiring layer is not disposed around the first through hole301. Therefore, stiffness of the substrate30around the first through hole301is lower than a substrate having the inner wiring layer. The inlay305increases the stiffness of the substrate30and restricts the strain in the substrate30.

In the present embodiment, the dummy hole is not provided in order to restrict the strain in the substrate30. Therefore, a situation is restricted that the dummy hole is deformed by the spring reaction force of the press-fit terminal to reduce the spring reaction force and the holding force of the substrate holding the press-fit terminal is reduced. As described above, the electronic device10according to the present disclosure restricts the strain in the substrate30generated by the press-fitting of the press-fit terminal501and restricts the decrease of the holding force of the substrate30holding the press-fit terminal501.

As described above, the press-fit terminal501is formed by plating the metal base made of phosphor bronze. The phosphor bronze has conductivity lower than, for example, pure copper. That is, the press-fit terminal501is likely to generate heat by energization. In the present embodiment, the inlay305is located near the press-fit terminal501. For example, the heat is dissipated out of the substrate30from the second end face305bof the inlay305. Accordingly, the inlay305effectively dissipates the heat generated in the press-fit terminal501.

Especially, in the present embodiment, in the direction of the elastic deformation of the press-fit terminal501, the inlay305is located between the first through hole301and the mounted region of the electronic component40. The inlay305is lined up with the first through hole301in the direction in which the stress generated by the press-fitting of the press-fit terminal501is applied. As a result, the inlay305effectively restricts the strain in the substrate30. Accordingly, the inlay305effectively restricts the decrease of the connection reliability of the electronic component40.

Although an example is described in which each inlay305is respectively provided for the multiple first through holes301, the present embodiment is not limited to the example. In a first modification shown inFIG. 4, the second through hole302is extended in the Y direction so that the second through hole302faces two first through holes301in the X direction. One inlay305blocks the stress generated by the press-fitting of two press-fit terminals501. In the first modification, heat conductivity of the inlay305is increased and efficiency of dissipating the heat is increased. Also, the number of process for press-fitting the inlay305is reduced.

Second Embodiment

The present embodiment may refer to the previous embodiment. Parts that are common with the electronic device10described in the previous embodiment will not be repeatedly described.

In the present embodiment, as shown inFIG. 5, a wiring306is disposed on the substrate30near the first through hole301in which the press-fit terminal501is inserted. The wiring306is a part of the wirings disposed on the base300and is different from the lands. Also in the present embodiment, the substrate30is the double-sided wiring substrate. The wiring306is disposed on the first surface30aand the second surface30bnear the first through hole301.

The second through hole302is formed between the first through hole301and the wiring306. That is, the inlay305is located between the first through hole301and the wiring306. Although not illustrated, in the present embodiment, the inlay305is disposed between the first through hole301and the wiring306in the X direction corresponding to the direction of the elastic deformation of the press-fit terminal501.

Similar effects to the first embodiment are achieved by the configuration of the second embodiment. For example, the inlay305is located between the first through hole301and the wiring306. The inlay305restricts a situation that the stress generated by the press-fitting of the press-fit terminal501is applied to the wiring306and defect such as flaking occurs in the wiring306. As a result, the wiring306may be disposed near the first through hole301. Especially in the substrate30having the double-sided wiring structure, the stress of press-fitting is restricted from being applied to the wiring306. Also in the present embodiment, the dummy hole is not provided. The strain in the substrate30generated by the press-fitting of the press-fit terminal501and the decrease of the holding force of the substrate30holding the press-fit terminal501are restricted. The inlay305efficiently dissipates the heat generated in the press-fit terminal501.

In the present embodiment, the inlay305is disposed between the first through hole301and the wiring306in the direction of the elastic deformation of the press-fit terminal501. The inlay305is lined up with the first through hole301in the direction in which the stress generated by the press-fitting of the press-fit terminal501is applied. That is, the inlay305effectively restricts the strain in the substrate30. Accordingly, the inlay305effectively restricts the defect of the wiring306.

The surface land303described in the first embodiment is also the wiring disposed near the first through hole301and is disposed similarly to the wiring306described in the present embodiment. Therefore, the inlay305also restricts the defect of the surface land303.

Also in the present embodiment, the inlay305may be commonly provided for the multiple first through holes301as described in the first modification.

Third Embodiment

The present embodiment may refer to the previous embodiments. The parts that are common with the electronic device10of the previous embodiments will not be repeatedly described.

In the present embodiment, as shown inFIG. 6, the inlay305is lined up with the first through hole301in the X direction corresponding to the direction of the elastic deformation of the press-fit terminal501. Furthermore, multiple press-fit terminals501are arranged in the X direction. The inlays305are disposed between the neighboring first through holes301in the X direction.

Similar effects to the first embodiment are achieved by the configuration of the third embodiment. For example, each inlay305is lined up with the first through hole301in the direction in which the stress generated by the press-fitting of the press-fit terminal501is applied. The inlay305effectively restricts the strain in the substrate30. Also in the present embodiment, the dummy hole is not provided. The strain in the substrate30generated by the press-fitting of the press-fit terminal501and the decrease of the holding force of the substrate30holding the press-fit terminal501are restricted. The inlay305efficiently dissipates the heat generated in the press-fit terminal501.

In the present embodiment, each inlay305is disposed between the neighboring first through holes301in the X direction. The inlay305restricts the stress generated by the press-fitting of the press-fit terminal501from applying to the other first through holes301. The inlay305restricts a situation that the first through hole301is deformed and, for example, the stress generated by the press-fitting of the press-fit terminal501is increased to be larger than a desired value.

Also in the present embodiment, the inlay305may be commonly provided for the multiple first through holes301as described in the first modification. In this case, the inlay305may be commonly provided for the multiple first through holes301lined up in the direction different from the direction of the elastic deformation.

Fourth Embodiment

The present embodiment may refer to the previous embodiments. The parts that are common with the electronic device10of the previous embodiments will not be repeatedly described.

In the present embodiment, the substrate30has a stress relaxation portion provided at the first surface30aso as to relax the stress generated by the press-fitting of the press-fit terminal501. InFIG. 7, the substrate30has a hollow307with a bottom as the stress relaxation portion. The hollow307is located between the first through hole301and the inlay305. The hollow307is defined by a side surface of the inlay305and a wall surface of the second through hole302.

The inlay305has a pillared shape. The inlay305has side surfaces305cand305dconnecting the first end face305aand the second end face305b. The side surface305cis communicated with the first end face305aand the side surface305dis communicated with the second end face305b. The side surface305cdefines a tapered shape. External diameter of a part of the inlay305corresponding to the side surface305cis increased with distance from the first end face305ain the Z direction. A part of the inlay305corresponding to the side surface305dhas a constant external diameter along the entire length of the side surface305d. In the Z direction, the side surface305cis shorter than the side surface305d.

The second through hole302has a constant inner diameter along the entire length of the side surface305d. Accordingly, since the inlay305has the side surface305cdefining the tapered shape, the hollow307is provided between the side surface305cof the inlay305and the wall surface of the second through hole302.

Next, effects of the above described electronic device10will be described.

When the press-fit terminal501is press-fitted into the first through hole301, the press-fit terminal501is initially in contact with an upper edge of the first through hole301, that is, the opening at the first surface30a. When the press-fit terminal501is press-fitted, the stress applied to the substrate30from the press-fit terminal501is increased at the first surface30a. Especially, the stress is increased at a surface layer of the first surface30a, for example, within 0.5 mm from the first surface30ain the Z direction.

In the present embodiment, the part of the inlay305corresponding to the side surface305chas the tapered shape and the hollow307opened toward the first surface30ais provided between the first through hole301and the inlay305. The hollow307allows the base300to be deformed and relaxes the stress generated when the press-fit terminal501is press-fitted.

The hollow307is opened only toward the first surface30aamong the first surface30aand the second surface30b. The hollow307is provided at the surface layer adjacent to the first surface30a. Accordingly, the hollow307restricts the decrease of the holding force of the substrate30holding the press-fit terminal501.

Although, in the present embodiment, an example is described in which the inlay305has the side surface305cdefining the tapered shape, the present disclosure is not limited to the example. The hollow307is provided by cutting a part of the first end face305aof the inlay305. The hollow307is also provided by changing the inner diameter of the second through hole302along the Z direction. Specifically, the hollow307is provided by enlarging the inner diameter of the second through hole302at a part of the first surface30athan the second surface30b.

The stress relaxation portion is not limited to the above example. For example, the stress relaxation portion may include the following modifications.

In a second modification shown inFIG. 8, the stress relaxation portion is provided by a recess305ehaving an opening at the first end face305aof the inlay305. The recess305eprovides a thin portion305fat a periphery of the recess305e. The thin portion305fis elastically deformable. That is, the recess305erelaxes the stress generated when the press-fit terminal501is press-fitted. The shape of the recess305eis not limited to the example shown inFIG. 8.

In a third modification shown inFIG. 9, the stress relaxation portion is provided by a groove308formed at the first surface30aof the substrate30between the first through hole301and the inlay305. In this case, similarly to the hollow307, the groove308relaxes the stress generated when the press-fit terminal501is press-fitted. Although the groove308has V shape inFIG. 9, the present disclosure is not limited to the example.

In a fourth modification shown inFIG. 10, the substrate30includes multiple bases300layered. The multiple bases300include a first base300adefining the first surface30aof the substrate30and a second base300bdisposed below the first base300a. The first base300ahas an elastic modulus lower than the second base300b. The stress relaxation portion is provided by a part of the first base300alocated between the first through hole301and the inlay305. The first base300ahaving lower elastic modulus relaxes the stress. Although an example is described in which the first base300ais entirely disposed at the first surface30ainFIG. 10, the present disclosure is not limited to the example. The first base300ais disposed at least between the first through hole301and the inlay305.

Fifth Embodiment

The present embodiment may refer to the previous embodiments. The parts that are common with the electronic device10of the previous embodiments will not be repeatedly described.

As shown inFIG. 11, in the present embodiment, the substrate30has a solder resist309disposed on a surface of the base300. The solder resist309covers at least a part of the periphery portion of the through hole land304located between the first through hole301and the inlay305. In the present embodiment, the solder resist309covers the entire part of the periphery portion of the through hole land304. Accordingly, the solder resist309has an over-resist structure on the periphery portion of the through hole land304.

The inlay305blocks the stress generated when the press-fit terminal501is press-fitted. In this case, there is a possibility that the stress is applied to the through hole land304. According to the present embodiment, the solder resist309covers the through hole land304at the periphery of the opening of the first surface30aand the solder resist309restricts the defect of the through hole land304such as flaking.

Sixth Embodiment

The present embodiment may refer to the previous embodiments. The parts that are common with the electronic device10of the previous embodiments will not be repeatedly described.

In the present embodiment, as shown inFIG. 12, the cover201made of metal is connected to the second end face305bof the inlay305through a heat conducting member60such as heat dissipating gel. The cover201has a protrusion202protruding toward an inner space of the enclosure20. The protrusion202protrudes so as to face the second end face305bof the inlay305in a state of the enclosure20accommodating the substrate30. The heat conducting member60is interposed between a top surface of the protrusion202and the second end face of the inlay305.

In the present embodiment, the cover201as a heat dissipating member is thermally connected to the inlay305. The above described heat generated in the press-fit terminal501is released to the cover201through the inlay305. Accordingly, the heat dissipating performance of the press-fit terminal501is improved. As a result, the quantity of energization of each press-fit terminal501is increased and the number of the press-fit terminals501is decreased.

The heat dissipating member is not limited to the cover201. For example, a heat sink may be employed as the heat dissipating member.

The press-fit terminal501is not limited to the terminal of the connector50.

The shape of the press-fit terminal501is not limited to the needle eye shape.

The electronic device10does not necessarily include the enclosure20.

The electronic component40is not necessarily the surface-mount-type component. A through-hole-mount-type component may be employed. However, the present disclosure is more effective for the surface-mount-type component that is more likely to be affected by the stress of the press-fitting of the press-fit terminal501.

The shape of the inlay305is not limited to the pillared shape.

While only the selected exemplary embodiment and examples have been chosen to illustrate the present disclosure, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made therein without departing from the scope of the disclosure as defined in the appended claims. Furthermore, the foregoing description of the exemplary embodiment and examples according to the present disclosure is provided for illustration only, and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.