JP2012054017A - Electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which prevents warpage of a circuit board of an ECU, stabilizes the contact pressure between a terminal of the coupler side and an electrode of the circuit board side, and easily attaches/removes the coupler to/from a case.SOLUTION: An ECU 16 is composed of a circuit board 16a, a case 20 supporting the circuit board 16a, and a coupler 22 housing multiple conductive wires 29. The coupler 22 is connected to the case 20 so that a terminal 30 of each conductive wire 29 contacts with an electrode 32 provided at the circuit board 16a. A tip 30a of each terminal 30 protrudes from a surface 22b of the coupler 22, which faces the circuit board 16a. Projecting parts 22c, which come in contact with a surface of the circuit board 16a, on which the electrodes 32 are provided, when the coupler 22 couples to the case 20, are provided on the surface 22b of the coupler 22. The coupler 22 and the case 20 are detachably coupled through a pair of engaging protrusions 50 and an engaging recessed part 52 or 52a.

Description

  The present invention relates to an electronic device, and more particularly to an electronic device having a circuit board on which electronic components are mounted and a coupler electrically connected to the circuit board.

  An automobile, a motorcycle, or the like is equipped with an engine control device (hereinafter referred to as “ECU”) as an electronic device for controlling an internal combustion engine (engine). The ECU has a circuit board (hereinafter simply referred to as “board”) on which a circuit including electronic components is mounted. In general, a plurality of harnesses are connected to an ECU having this board via a coupler.

  For example, Patent Document 1 discloses a structure for connecting an ECU and a harness that includes a coupler on the ECU side and a coupler on the harness side to connect the couplers.

JP 2002-203614 A

  However, the connector connection structure disclosed in Patent Document 1 requires a coupler on the ECU side and a coupler on the harness side, which increases the number of components. Further, in the case where the layout space is more restrictive than a four-wheeled vehicle such as a motorcycle, it is desired to reduce the size in a state where the ECU and the harness are assembled.

  Further, the ECU may be warped due to a difference in expansion amount of the ECU due to a thermal effect that varies depending on a place where the ECU is mounted. However, a configuration that can prevent the ECU from warping while reducing the number of parts is desired. .

  An object of the present invention is to prevent an increase in the number of parts by providing a coupler on both the ECU side and the harness side, to reduce the size in a state where the ECU and the harness are assembled, and depending on where the ECU is attached. An object of the present invention is to provide an electronic device that can prevent ECU warping due to different amounts of thermal expansion.

  In order to achieve the above object, the present invention comprises a circuit board, a case for holding the circuit board, and a coupler for accommodating a plurality of conductors, and a plurality of electrodes provided with terminals of the conductors on the circuit board. In the electronic device connected to the case via the coupler so as to contact each other, a tip of the terminal protrudes from one surface of the coupler facing the circuit board, and is connected to the plurality of electrodes. Convex portions that are in direct contact with each other and that are in contact with the surface of the circuit board on which the electrodes are provided in a state where the coupler and the case are connected are formed on the one surface of the coupler, A first feature is that the coupler and the case are detachably connected to each other via a pair of engaging portions provided on the coupler and the case.

  Further, according to the present invention, the tip of the terminal protrudes from the terminal through hole formed in the coupler to the one surface side, and the convex portion avoids the terminal through hole and between the terminal through holes. There is a second feature in that the convex portions are arranged at positions spaced apart from the plurality of terminal through holes at an equal interval, or the convex portions are adjacent to the plurality of terminal through holes. The third feature is that they are arranged in the same manner.

  In addition, the present invention has a fourth feature in that the convex portion is a columnar body, and a fifth feature in that the convex portion is a plate-like or lattice-like rib.

  Further, the present invention has a sixth feature in that the intersection of the vertical and horizontal members of the lattice constituting the rib is positioned between the plurality of terminal through holes.

  In addition, the present invention has a seventh feature in that the circuit board is resin-molded except for a portion where the electrodes are arranged.

  In the present invention, the engaging portion between the coupler and the case includes a convex portion and a concave portion, the convex portion is provided on one of the case and the coupler, and the concave portion is provided on the other of the case and the coupler. There is an eighth feature.

  Furthermore, the present invention has a ninth feature in that the circuit board constitutes a part of an engine control device mounted on an engine throttle device.

  According to the present invention having the first to tenth features, the harness-side coupler terminal is brought into direct contact with the electrode of the ECU board, so that the ECU-side coupler is not required, and the number of parts is reduced (the ECU-side coupler is reduced). While the coupler is connected to the case, the circuit board can be effectively prevented from warping.

  In particular, according to the present invention having the second feature, the convex portions arranged between the terminal through holes, avoiding the terminal through holes, abut the circuit board between the electrodes, and warp the circuit board. It can be effectively prevented.

  Further, according to the present invention having the third feature, since the convex portion is disposed adjacent to the plurality of terminal through holes, the convex portion contacts the circuit board at a plurality of points. It is possible to effectively prevent the circuit board from warping.

  In addition, according to the present invention having the fourth feature, since the convex portion is constituted by the columnar body that is resistant to buckling, it is possible to generate a large resistance against the warp of the circuit board.

  According to the present invention having the fifth feature, the strength (rigidity) of the coupler can be increased by the rib.

  Further, according to the present invention having the sixth feature, the strength of the coupler can be improved by the grid-like ribs, and the rib can be brought into contact with a wide area of the circuit board. As well as circuit board protection performance.

  Further, according to the present invention having the seventh feature, since the portions other than the electrode portion are resin-molded, the electrode portion forms a recess that falls from the surface of the circuit board. Therefore, the terminal on the coupler side does not shift to the periphery of the recess and is in the recess so that the contact state of the terminal tip with the electrode can be stabilized.

  Further, according to the present invention having the eighth feature, it is possible to firmly connect by fitting the concave and convex shapes, and when the coupler is formed of rubber or resin, the coupler is deformed so that the coupler is removed from the case. It can be easily removed.

  In addition, according to the present invention having the ninth feature, the circuit board of the ECU can be prevented from being deformed (warped) when applied to an engine control device (ECU) that is easily affected by heat from the engine.

It is principal part sectional drawing of the throttle apparatus containing the electronic apparatus which concerns on one Embodiment of this invention. It is a principal part expanded sectional view of a circuit board and a coupler. It is principal part sectional drawing of the throttle apparatus containing the electronic device which concerns on 2nd Embodiment of this invention. It is a front view of the circuit board of the electronic device which concerns on 2nd Embodiment. It is a front view of the circuit board concerning a modification. It is a perspective view of the coupler which adapts to the circuit board concerning a modification. It is a front view of the coupler which has the convex part which consists of a rib. It is a perspective view of the coupler which has the convex part which consists of a rib. 1 is a side view of a motorcycle to which an ECU integrated throttle device according to an embodiment of the present invention is applied. FIG. 10 is an enlarged view of the throttle device portion of FIG. 9.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 9 is a side view of the motorcycle 1 to which the ECU integrated throttle device according to the embodiment of the present invention is applied. FIG. 10 is an enlarged view of the throttle device portion of FIG. A head pipe 2 that supports the front fork 4 so as to be steerable is attached to a front end portion of the main frame 3. A pivot plate 62, a pair of left and right seat rails 17 that are welded to the front end of the main frame 3 and extended rearward, and an intermediate portion of the seat rail 17 and the pivot plate 20 A pair of left and right reinforcing frames 21 that connect the two are attached.

  A front wheel WF is pivotally supported at the lower end of the front fork 4, and a rod-shaped steering handle 63 is connected to the upper portion of the front fork 4. A front fender 6 that covers the upper side of the front wheel WF is supported by the front fork 4. Below the main frame 3, a water-cooled single-cylinder engine E having a cylinder axis slightly raised forward is disposed. The engine E is supported using a pivot plate 62 and a hanger plate 64 provided at an intermediate portion of the main frame 3.

  A pivot 65 penetrating the pivot plate 62 in the vehicle width direction supports a front end portion of the swing arm 66 so as to be swingable up and down. A rear wheel WR to which the output of the engine E is transmitted via the drive chain 23 is rotatably supported at the rear end of the swing arm 66. A rear cushion 19 is provided between the seat rail 17 and the swing arm 66. A fuel tank 67 is disposed between the pair of left and right seat rails 17, and a storage box 68 that is accessible by opening the openable seat 15 is disposed in front of the fuel tank 67 on the vehicle body. The rear upper part of the rear wheel WR is covered with a rear fender 69.

  An ECU integrated throttle device 10 is connected to the upper side wall of the cylinder head 11 of the engine E via an intake pipe. A fuel injection valve 27 (see FIG. 10) for injecting fuel toward the intake port of the cylinder head 11 is attached midway in the intake pipe. The upstream end of the throttle device 10 is connected to the air cleaner box 7. The exhaust pipe 71 is drawn out from the lower part of the engine E.

  The throttle device 10 is rotatably supported by a butterfly throttle valve (which will be described later with reference to FIG. 1) for adjusting the amount of air supplied to the engine E, and a throttle wire is connected to a pulley 142 arranged continuously to the throttle valve. 141 is wound.

  A synthetic resin vehicle body cover 13 that covers a part of the engine E, the throttle device 10 and the air cleaner box 7 is attached to the main frame 3. A leg shield 8 that covers the occupant's legs from the front is disposed in front of the vehicle body cover 13. The vehicle body cover 13 is provided with an opening 70 that allows adjustment of the throttle device 10 and heat removal from the engine E slightly behind the throttle device 10 in a side view of the vehicle body.

  FIG. 1 is a partial cross-sectional view showing a main part of a throttle device including an ECU (electronic device) according to an embodiment of the present invention. The throttle device 10 includes a throttle body 12, a throttle valve 14 which is a butterfly valve incorporated in the throttle body 12 and rotatably supported, and an ECU 16 which controls the fuel injection amount based on the opening degree of the throttle valve 14 and the like. Including. The shaft of the throttle valve 14 (throttle shaft: indicated by the axis 140) extends rightward in FIG. 1, and a wire pulley 142 to which the throttle wire 141 is locked is attached to the end of the throttle shaft. Between the ECU 16 and the throttle body 12, a device unit 18 including a throttle sensor and an actuator for driving an idle adjustment valve (not shown) is provided.

  The ECU 16 mounts electronic components and elements such as capacitors between a surface (first surface) 24 near the throttle body 12 and a surface (second surface) 26 opposite to the first surface 24, respectively. This is a so-called double-sided electrode. The ECU 16 and the device unit 18 are accommodated in a case 20, and a connector or a coupler (hereinafter referred to as “coupler”) 22 is connected to the case 20. The coupler 22 is preferably a flexible material such as resin or rubber.

  A plurality of first electrodes 28 for electrically connecting the device unit 18 and the ECU 16 are provided on the first surface 24 of the substrate 16a. The coupler 22 accommodates an assembly (that is, a harness) of a plurality of signal lines (or conductors) 29. The second surface 26 of the substrate 16 a is provided with a plurality of second electrodes 32 for electrically connecting the terminals 30 provided on the signal lines 29 focused on the coupler 22.

  The outer surface 16S of the substrate 16a including the first surface 24 and the second surface 26 is molded with a resin material except for the portion where the first electrode 28 and the second electrode 32 are provided. That is, the first electrode 28 and the second electrode 32 are not covered with the resin material and are exposed on the surface. As a resin molding method, it is preferable to use a pressure molding method (transfer mold molding) in which a heated and pressurized resin is injected into a heating mold.

  The second electrodes 32 are disposed in the recesses 34 formed in the second surface 26 of the substrate 16 a by the same number as the second electrodes 32, and the second electrodes 32 and the recesses 34 are not protruded from the recesses 34. Each dimension is determined. The recess 34 is formed by the resin mold.

  The terminal 30 and the second electrode 32 provided on the substrate 16a are electrically connected by a contact component 42 made of conductive rubber provided therebetween. The contact component 42 is received and positioned in a recess 38 formed in the coupler 22. The coupler 22 is in contact with the second surface 26 of the substrate 16a at the tip of the convex portion formed between the concave portions 38 by the concave portion 38.

  An engagement protrusion 50 is formed on the outer surface of the side wall of the case 20, and an engagement recess 52 in which the engagement protrusion 50 is fitted is formed on the inner wall of the coupler 22. The engaging recess 52 may be an opening penetrating the side wall of the coupler 22. A recess for receiving the seal 54 is formed on the inner surface of the side wall of the case 20 and the outer surface of the side wall of the coupler 22. When the inner peripheral surface of the side wall of the coupler 22 is engaged with the outer peripheral surface of the side wall of the case 22 and the engaging protrusion 50 is engaged with the engaging recess (or opening) 52, the coupler 22 and the case 20 are firmly connected. The Thereby, the contact component 42 is compressed, and the electrical connection between the terminal 30 and the second electrode 32 is further ensured. As shown in the figure, it is preferable to provide a seal 54 between the case 20 and the device unit 18. The engaging recess 52 may be provided on the case 20 side, and the engaging protrusion 50 may be provided on the coupler 22 side.

  Next, the substrate and the coupler will be described in more detail with reference to enlarged views. FIG. 2 is an enlarged cross-sectional view of a main part in a state where the coupler 22 is separated from the substrate 16a. In FIG. 2, the coupler 22 abuts against the second surface 26 of the substrate 16a at the end surface of the portion 22a forming the recess 38 into which the contact component 42 is fitted.

  The coupler 22 is provided with a guide hole 36 for receiving the terminal 30 and the distal end portion of the signal line 29. The guide holes 36 are formed in a number corresponding to the number of signal lines 29 scheduled to be used. 1 and 2 show the coupler 22 in which the wall forming the guide hole 36 is integrated with the adjacent wall to form a single block, the walls of each guide hole 36 are separated. Also good. That is, the adjacent walls of the guide holes 36 provided in the coupler 22 may be separated from each other to form a plurality of cylindrical portions (sheaths) that accommodate the terminals 30 and the signal wires 29 one by one. .

  The guide hole 36 is not perpendicular to the surface on the coupler 22 side facing the second surface 26 of the substrate 16a, but is formed with an angle θ. The concave portion 38 in which the contact component 42 is accommodated is formed in a direction perpendicular to the surface of the coupler 22 facing the second surface 26 and is connected to the guide hole 36.

  The contact component 42 accommodated in the recess 38 includes a disk-shaped base 48 having a rim 46 around it and a protrusion 44 extending from the base 48 toward the second electrode 32. When the coupler 22 is coupled to the substrate 16a as shown in FIG. 1, the convex portion 44 is compressed and spreads into the space formed between the rim 46 and the convex portion 44. The coupler 22 and the case 20 can be easily connected while improving the electrical contact between the terminal 30 and the second electrode 32.

  In addition, since the harness side coupler terminal is brought into direct contact with the electrode on the ECU board, the ECU side coupler becomes unnecessary, and the number of parts (reduction of the ECU side coupler) is reduced while the coupler is connected to the case. Further, warping of the circuit board can be effectively prevented.

  The portion 22a of the coupler 22 positioned between adjacent ones of the contact parts 42 abuts on the second surface 26 between the adjacent recesses 34 on the substrate 16a side. Since the portion 22a of the coupler 22 is in contact with the second surface 26 of the substrate 16a, the deformation (warp) of the substrate 16a is prevented while maintaining the detachability of the coupler 22 with respect to the case 20 favorably. be able to. In this embodiment, the terminal 30 is brought into contact with the second electrode 32 through the contact component 42. However, as shown below, the terminal 30 is extended toward the substrate 16a without using the contact component 42. Then, the second electrode 32 may be contacted.

  Next, a second embodiment of the present invention will be described. FIG. 3 is a partial cross-sectional view showing a main part of a throttle device including an ECU, and the same reference numerals as those in FIG. 1 denote the same or equivalent parts. In the second embodiment, the contact component 42 is not interposed between the terminal 30 of the signal line 29 and the second electrode 32.

  Accordingly, the terminal 30 is connected to the substrate 16a side from the surface 22b of the coupler 22 facing the second surface 26 of the substrate 16a so that the terminal 22 is in direct contact with the second electrode 32 in a state where the coupler 22 is coupled to the case 20. It is formed to extend. The surface 22b facing the second surface 26 of the substrate 16a is not in contact with the second surface 26, and a plurality of convex portions 22c projecting from the surface 22b toward the substrate 16a contact the second surface 26. Touch.

  In the second embodiment, a rubber bush 61 is placed around the signal line 29 and the periphery of the rubber bush 61 is brought into contact with the inner peripheral surface of the guide hole 36 to provide waterproofness.

  FIG. 4 is a front view of the substrate 16a, that is, a view of the substrate 16a viewed from the coupler 22 side. In FIG. 4, on the second surface 26 of the substrate 16a, a plurality of recesses 34 (reference numerals are given to only one column in order to avoid complications) are arranged at equal intervals in the vertical and horizontal directions. Yes. The concave portions 34 adjacent in both the vertical direction and the horizontal direction are alternately arranged at every other intersection of the lattices indicated by the dotted lines.

  And between the recessed parts 34 arranged in this way, for example, as shown by black circles T (only one vertical line is given to avoid complexity), the four recessed parts 34 are equally spaced from each other. Thus, the position where the convex portion 22c on the coupler 22 side abuts is determined.

  Thus, in the second embodiment as well, as in the embodiment described with reference to FIGS. 1 and 2, the convex portion 22c of the coupler 22 is brought into contact with the second surface 26 of the substrate 16a. It is possible to prevent the deformation (warping) of the substrate 16a while maintaining good detachability of the coupler 22 with respect to 20.

  The number of the recesses 34 provided in the substrate 16a is not limited to the number shown in FIG. 4, and can be changed as necessary. Similarly, the convex portions 22c of the coupler 22 abutted between the concave portions 34 are not arranged so as to correspond to all the intermediate points of all the concave portions 34, and the number of the convex portions 22c warps the substrate 16a. It can be set arbitrarily in consideration of the usage environment that causes

  The arrangement of the recesses 34 is not limited to being alternated in the vertical direction and the horizontal direction. FIG. 5 is a front view of the substrate 16a according to a modification of the arrangement of the recesses 34. FIG. In this example, the recesses 34 are arranged at every other intersection of the lines indicated by dotted lines, but they are not staggered. Also in this case, the coupler 22 side is formed so that the convex portion 22c comes into contact with a position (indicated by a black circle T) that is equally spaced from the four concave portions 34 on the substrate 16a.

  The arrangement of the concave portions 34 and the convex portions 22c may be determined according to the number of terminals 30 and the second electrodes 32, the size of the substrate 16a, and the like. In addition, when the number of the terminals 30 and the number of the second electrodes 32 are large and the arrangement interval is small, it is preferable to arrange the convex portions 22c at equal intervals from the terminal through holes 60 through which the terminals 30 are passed. However, when the number of the terminals 30 and the number of the second electrodes 32 are small and the arrangement interval between them is large, the convex portions 22c are not arranged at an equal interval from the terminal through holes 60, but in the terminal through holes 60. It is preferable to arrange the convex portions 22c close to each other.

  FIG. 6 is a view of the coupler 22 that conforms to the arrangement of the recesses 34 shown in FIG. 5 as seen from an oblique direction on the side facing the substrate 16a. In FIG. 6, the tip 30a of the terminal 30 protrudes from the terminal through hole 60 of the coupler 22, and its end is bent upward in the drawing. Due to the bent shape of the tip 30a of the terminal 30, the terminal 30 can be elastically contacted with the second electrode 32 in a wide area.

  Engagement openings 52 a into which the engagement protrusions 50 of the case 20 are fitted are formed in the side walls (walls having a surface orthogonal to the surface facing the substrate 16 a) 55 of the coupler 22. The engagement opening 52a replaces the engagement protrusion 52. The engagement openings 52a are formed not only on the upper and lower side walls 55 but also on the side walls 56 provided sideways. Therefore, an engagement protrusion that engages with the engagement opening 52 a is also provided at a corresponding position of the case 20.

  The side walls 55 and 56 provided with the engagement openings 52a have slits 57 at positions close to the engagement openings 52a. The slits 57 are cut from the end surfaces of the side walls 55 and 56, so that the portions of the side walls 55 and 56 having the engagement openings 52a are easily bent. Therefore, the case 20 is formed in the engagement openings 52a with a relatively small force. It becomes easy to fit the projection 59 for engagement. The convex portion 22c is not limited to a cylindrical shape, and may be a polygonal column shape.

  Furthermore, in the above-described embodiment, the convex portion 22c provided on the coupler 22 has a columnar shape as shown in FIG. 6, but the convex portion 22c is not limited to a columnar shape. FIG. 7 is a front view of the coupler 22 showing an example of a rib instead of the columnar convex portion 22c, and FIG. 8 is a perspective view thereof. 7 and 8, the terminals 30 protruding from the coupler 22 to the front side (the front side in FIG. 7) are arranged in three rows and four rows, and the terminals 30 are separated from each other. Ribs 58 are formed integrally with the coupler 22. The height of the rib 58 is lower than the side walls 55 and 56 of the coupler 22 so that the tip of the terminal 30 protruding from the coupler 22 can form a good contact state with the second electrode 32 of the substrate 16a. The tip of the terminal 30 is set so as to protrude from the rib 58 to the front side. In addition, the dimensions are set so that the end surface of the rib 58 abuts against the second surface 26 of the substrate 16 a while being connected to the case 20.

  As shown in the figure, the ribs 58 are formed in a lattice shape when viewed from the front, and the intersections 58 a of the longitudinal and transverse members constituting the lattice are located between the plurality of terminal through holes 60. Preferably, the intersection point 58a is preferably arranged at a position spaced apart from the terminal through hole 60 at equal intervals. Since the strength around the terminal through hole 60 can be uniformly increased by the ribs 58 and the convex portions 22c, the electrical contact pressure between the terminal 30 and the second electrode 32 can be stabilized.

  The ribs 58 are not limited to the lattice shape, but may be a simple plate shape extending in the vertical direction or the horizontal direction, or a cross shape in front view in which the intersection of the vertical and horizontal members is located between the terminal through holes 60. Or a part of the lattice-like rib 58 may be used.

  As described above, according to the present embodiment, electrical signals are transmitted and received between the harness terminal 30 provided on the coupler 22 side and the second electrode 32 on the substrate 16a side in a state combined with the substrate 16a. Alternatively, in the structure in which a voltage can be applied, a protruding portion (the protruding portion 22c or the rib 58) is provided on the surface on the coupler 22 side facing the second surface 26 of the substrate 16a, and the protruding portion is provided on the substrate 16a. The substrate 16a can be prevented from warping due to thermal influences. In addition, the contact position between the terminal 30 and the second electrode is stabilized because the mounting position of the coupler 22 and the substrate 16a is fixed by contacting the protruding portion with the substrate 16a, that is, a fixed positioning is possible. There is an advantage of doing.

  Although the present invention has been described with reference to a specific embodiment, the present invention is not limited to this embodiment, and those skilled in the art can make modifications or applications without departing from the scope of the claims. .

  For example, the arrangement of the protrusions (protrusions 22c and ribs 58) provided in the recesses 34 of the substrate 16a and the coupler 22 can be changed as appropriate. In short, it is only necessary to avoid the concave portion 34 and to be disposed so that the end surface of the protruding portion contacts the substrate 16a between the adjacent protruding portions.

  In the embodiments, the electronic device is described as an ECU incorporated in the throttle device. However, the present invention is not limited to this, and is used in control devices such as an automatic transmission, a fuel supply device, an alternator, and a power supply device that are controlled by a motor, a solenoid, or the like as a driving means. The present invention can also be applied to an electronic device that requires a connecting portion.

  DESCRIPTION OF SYMBOLS 10 ... Throttle device, 12 ... Throttle body, 14 ... Throttle valve, 16 ... ECU (electronic device), 16a ... Circuit board, 18 ... Device unit, 20 ... Coupler, 22 ... Case, 22c ... Projection, 24 ... First 26 ... second surface 29 ... signal wire (conductive wire) 30 ... terminal 32 ... second electrode 34 ... concave 36 ... guide hole 42 ... contact component (conductive rubber) 50 ... Engaging projection, 52 ... engaging recess, 55 ... coupler side wall, 57 ... slit, 58 ... rib, 58a ... intersection of lattice, 60 ... terminal through hole

Claims (11)

A circuit board (16a), a case (20) for holding the circuit board (16a), and a coupler (22) for accommodating a plurality of conductors (29),
The terminal (30) of the conducting wire (29) is connected to the case (20) via the coupler (22) so as to come into contact with the plurality of electrodes (32) provided on the circuit board (16a). Electronic devices
A tip (30a) of the terminal (30) protrudes from one surface (22b) of the coupler (22) facing the circuit board (16a) and directly contacts the plurality of electrodes (32). ,
The surface (16a) of the circuit board (16a) in which the electrode (32) is provided on the one surface (22b) of the coupler (22) in a state where the coupler (22) and the case (20) are connected. 26) and a convex portion (22c) that is in contact with
The electronic device, wherein the coupler (22) and the case (20) are detachably connected to each other via a pair of engaging portions (50, 52 or 52a) provided on the coupler (22) and the case (20). The tip (30a) of the terminal (30) protrudes from the terminal through hole (60) formed in the coupler (22) toward the one surface (22b),
The electronic device according to claim 1, wherein the convex portion (22c) is disposed between the terminal through holes (60) so as to avoid the terminal through holes (60). The tip (30a) of the terminal (30) protrudes from the terminal through hole (60) formed in the coupler (22) toward the one surface (22b),
The electronic device according to claim 1, wherein the convex portion (22c) is arranged at a position spaced apart from the plurality of terminal through holes (60) at equal intervals. The tip (30a) of the terminal (30) protrudes from the terminal through hole (60) formed in the coupler (22) toward the one surface (22b),
The electronic device according to claim 1, wherein the convex portion (22c) is disposed adjacent to the plurality of terminal through holes (60).   The said convex part (22c) is a columnar body, The electronic device in any one of Claims 1-4 characterized by the above-mentioned.   The electronic device according to claim 1, wherein the convex portion (22 c) is a plate-like rib.   The electronic device according to claim 1, wherein the convex portion is a plate-like or lattice-like rib.   The electron according to claim 7, wherein the intersection (58a) of the vertical and horizontal members of the lattice constituting the rib (58) is located between the plurality of terminal through holes (60). apparatus.   The electronic device according to any one of claims 1 to 8, wherein the circuit board (16a) is resin-molded except for a portion where the electrode (32) is disposed.   The engaging portion of the coupler (22) and the case (20) includes a convex portion (50) and a concave portion (52), and the convex portion is provided on one of the case (20) and the coupler (22), and the concave portion The electronic device according to claim 1, wherein the electronic device is provided on the other of the case (20) and the coupler (22).   11. The electronic device according to claim 1, wherein the circuit board (16a) constitutes a part of an engine control device (16) mounted on an engine throttle device.

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