JP5800597B2 - Flat circuit assembly structure - Google Patents

Description

  The present invention relates to a flat circuit body assembly structure in which a flat circuit body is assembled to a housing to constitute a connector.

  Conventionally, for example, a flexible printed wiring base wall (hereinafter referred to as FPC) formed by baking an electric conductor on an insulating film, or a flexible flat formed by insulatingly covering a plurality of conductors arranged in parallel to each other・ Flat circuit bodies such as cables enable wiring in narrow places due to their structure, and because they can be used for movable parts due to their flexible properties, they can be used for wire harnesses that connect automobile electrical components and computer Widely used in various devices such as machines.

  By the way, since these flat circuit bodies have flexibility, when they are connected to a connector, it is necessary to make the terminal into a rigid terminal (see Patent Document 1 and Patent Document 2). FIG. 14 is a cross-sectional view showing a conventional connector structure. As shown in FIG. 14, the conventional connector structure 100 described in Patent Document 1 includes a plurality of connection terminals 125, a connector housing 121 having a plurality of terminal accommodation chambers 126 for accommodating these connection terminals 125, and the terminals. A holder 105 having a plurality of flat plate portions 151 fitted in the accommodation chamber 126 and an FPC 101 as a flat circuit body held by the holder 105 are provided.

  The holder 105 includes a plurality of base portions 150 and a plurality of flat plate portions 151 extending from the base portions 150 toward the connector housing 121. Each of the plurality of flat plate portions 151 is provided with a pair of fixing pins 110. The pair of fixing pins 110 are provided at the end (root) of the flat plate portion 151 on the base portion 150 side. Further, the pair of fixing pins 110 are provided on the front side surface and the back side surface of the flat plate portion 151 and are convex in a direction away from each other.

  In the FPC 101, a plurality of conductors (not shown) constituting a predetermined circuit are baked on an insulating film (not shown), and the plurality of conductors are covered with an insulating sheet (represented by reference numeral 101). Further, the FPC 101 is formed with a conductive portion in which conductors are arranged in parallel at a predetermined interval. In the insulating film between the conductors in the conductive portion, a pair of attachment holes 102 are formed which are inserted into the pair of fixing pins 110 of each flat plate portion 151. The FPC 101 is assembled to the holder 105 by inserting each mounting hole 102 of the FPC 101 into each fixing pin 110 of each flat plate portion 151.

JP 2001-68189 A JP 2002-124326 A

  However, the conventional connector structure 100 described above has the following problems. That is, in the conventional connector structure 100, a loose position between the fixing pins 110 of the holder 105 and the mounting holes 102 of the FPC 101 may cause looseness between the FPC 101 and the holder 105 around which the FPC 101 is wound. There was a problem that there was. If looseness occurs between the FPC 101 and the holder 105 around which the FPC 101 is wound, there is a possibility that a contact failure between the FPC 101 and the other connection terminal 125 may occur or the FPC 101 may be damaged by the connection terminal 125. There was a problem.

  The object of the present invention is to solve the above problems. That is, the present invention provides a flat circuit assembly assembly structure that can prevent looseness between the flat circuit body and the winding portion around which the flat circuit body is wound, and in addition, can improve waterproofness. The purpose is to provide.

The invention according to claim 1 is provided with a base wall provided with a through hole, at least one convex portion provided on the back side surface of the base wall, and provided on the front side surface of the base wall and fitted with a counterpart housing A peripheral wall, a winding portion standing from the edge of the through hole and protruding into the peripheral wall, and a pair of slits for inserting a flat circuit body provided on the base wall on both sides of the winding portion. comprising a housing, a flat circuit body with a hole portion is provided to fit the convex portion, and a stopper portion abutting the elastic to the ends of the base wall of said winding portion is pressed into the through hole, wherein In a state where the flat circuit body is inserted through one of the slits and spanned along the winding portion, inserted through the other slit and fitted into the convex portion, and pulled to the back side of the base wall, The stopper is press-fitted into the through hole. The flat circuit body assembly structure is characterized by pressing the flat circuit body against the inner surface of the through hole.

  With the above configuration, the elastic plug portion is pressed into the through hole and compressed, and the flat circuit body is pressed against the inner surface of the through hole by the compression reaction force.

  The invention according to claim 2 is the invention according to claim 1, wherein the through hole includes a pair of long sides including the inner surface along the flat circuit body width direction, and a pair of short sides along the flat circuit body longitudinal direction. The plug portion is formed in a rectangular column shape that elastically contacts the long side portion and the short side portion.

  According to the above configuration, the elastic plug portion is pressed into the through hole and compressed, and the plug portion elastically contacts the long side portion and the short side portion of the through hole by the compression reaction force.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a rib is erected on the base wall so as to surround the through hole and the convex portion, and silicone is provided inside the rib. It is characterized by being poured.

  With the above configuration, the liquid silicone is filled in the frame-shaped ribs and is elastically cured at room temperature.

  According to the invention of claim 1, in the state in which the hole portion is fitted into the convex portion, the flat circuit body is bridged along the winding portion and pulled to the back side of the base wall, the plug portion is Since the flat circuit body is pressed against the inner surface of the through-hole by being press-fitted into the through-hole, the occurrence of looseness between the flat circuit body and the winding portion is prevented, and the flat circuit body and the counterpart terminal In addition to preventing poor contact, it is possible to prevent the flat circuit body from being damaged. In addition, liquid such as water can be prevented from entering the front side of the base wall and the back side of the base wall from the through hole.

  According to invention of Claim 2, the said through-hole has a pair of long side part containing the said inner surface along a flat circuit body width direction, and a pair of short side part along a flat circuit body longitudinal direction, Since the plug portion is formed in a rectangular column shape that elastically contacts the long side portion and the short side portion, the plug portion closes the through hole without gaps, and liquid such as water can flow from the through hole to the base wall. Intrusion into the front side and the back side of the base wall can be reliably prevented.

  According to the invention of claim 3, a rib is erected on the base wall so as to surround the through hole and the convex portion, and silicone is poured into the inside of the rib. It is possible to more reliably prevent loosening between the flat circuit body and the winding portion due to the liquid, and liquid such as water can enter the front side of the base wall and the back side of the base wall from the through hole. Can be prevented more reliably.

It is sectional drawing which shows one Embodiment of the flat circuit body assembly | attachment structure concerning this invention. It is sectional drawing which shows the state which the other party connector fitted in the connector in the flat circuit body assembly | attachment structure shown by FIG. It is a perspective view which shows the front side of the housing which comprises the connector shown by FIG. It is a perspective view which shows the back side of the housing shown by FIG. It is sectional drawing which follows the II line | wire in FIG. FIG. 5 is a perspective view illustrating a state in which liquid silicone is poured into the housing illustrated in FIG. 4. It is a perspective view which shows FPC which is a flat circuit body which comprises the connector shown by FIG. It is a perspective view which shows the plug part which comprises the connector shown by FIG. FIG. 4 is a perspective view illustrating a state where an FPC is assembled to the housing illustrated in FIG. 3. FIG. 10 is a perspective view illustrating a state in which a plug portion is assembled to the housing illustrated in FIG. 9. It is a figure which expands and shows the principal part of the housing shown by FIG. FIG. 4 is a perspective view illustrating a state where an FPC is assembled to the housing illustrated in FIG. 3. It is a perspective view which shows the other party connector shown by FIG. It is sectional drawing which shows the conventional connector structure.

  A connector in a flat circuit assembly structure according to an embodiment of the present invention will be described with reference to FIGS. The connector 2 'constitutes a part of a wire harness that connects an in-vehicle camera that is an electrical component of an automobile. As shown in FIGS. 1 and 2, the connector 2 ′ includes a peripheral wall 24 into which a mating housing 8 (described later) of the mating connector 7 into which the connector 2 ′ is fitted, and a winding portion 3 protruding into the peripheral wall 24. A flexible printed cable (FPC) 4 arranged along the winding portion 3, and an elastic plug portion 5 for closing a through-hole 22 described later provided in the housing 2, It has.

  As shown in FIGS. 3 and 4, the housing 2 is provided with a plate-like base wall 21 provided with a through hole 22, and a hole 42 described later of the FPC 4. Two bosses 23 that fit into each other, a peripheral wall 24 that stands on the front side of the base wall 21 and surrounds the through hole 22, a winding portion 3 that protrudes into the peripheral wall 24, and surrounds the through hole 22 and the two bosses 23. In this manner, a rib 26 standing in a frame shape and into which liquid silicone is poured inside and a frame portion 27 standing from the periphery of the base wall 21 and surrounding the rib 26 are integrally provided. Further, in the present invention, the upper side in the paper direction from the base wall 21 in FIGS. 1, 2, and 5 is expressed as “front”, and the lower side in the paper direction from the base wall 21 is expressed as “back”. .

  Of the front side surface of the base wall 21, as shown in FIG. 5, the inner portion of the peripheral wall 24 described later is positioned higher than the outer portion of the peripheral wall 24, that is, above. In addition, on the back side surface of the base wall 21, an inner portion of the rib 26 described later is positioned higher than an outer portion of the rib 26, that is, an upper portion.

  As shown in FIGS. 4 and 5, the through-hole 22 includes a pair of first inner surfaces 22a and 22b facing each other, a pair of second inner surfaces 22c and 22d connected to edges of the first inner surfaces 22a and 22b, It is constituted by. These inner surfaces 22a, 22b, 22c, and 22d are connected to the front side surface and the back side surface of the base wall 21. The dimension of each first inner surface 22a, 22b in the arrow Y direction is larger than the dimension of each second inner surface 22c, 22d in the arrow X direction, and the through hole 22 is formed in a rectangular shape in plan view. Of the first inner surfaces 22a and 22b, a first inner surface 22a is provided on the side of two bosses 23 described later, and a first inner surface 22b is provided on the side away from the two bosses 23. The pair of first inner surfaces 22a corresponds to “long side portions” described in the claims, and the first inner surface 22b includes “the inner surfaces of the through holes” and “long” described in the claims. Corresponds to “side”. Further, the pair of second inner surfaces 22c and 22d corresponds to “short side portions” recited in the claims.

  In this specification, the arrow X indicates the width direction of the through hole 22, the arrow Y indicates the longitudinal direction of the through hole 22, and the arrow Z is a direction orthogonal to the arrow Y direction and the arrow X direction. The through direction of the through hole 22, the height direction of the connector 2 ′, the fitting direction between the connector 2 ′ and the mating connector 7, and the protruding direction of the winding portion 3 are shown.

  Moreover, the dimension of the longitudinal direction (arrow Y direction) of the through-hole 22 is formed so that it may become slightly larger than the width direction (arrow X direction) of FPC4 mentioned later. The FPC 4 is routed so that the longitudinal direction of the through hole 22 and the width direction of the FPC 4 are parallel, and the width direction of the through hole 22 and the longitudinal direction of the FPC 4 are parallel.

  As shown in FIG. 4, the two bosses 23 are provided in the longitudinal direction of the through hole 22 (in the arrow Y direction) with a space between each other. Each boss 23 is formed in a convex cylindrical shape from the back side surface of the base wall 21. Since the two bosses 23 are provided in the longitudinal direction of the through hole 22, the FPC 4 is routed so that the width direction of the FPC 4 and the longitudinal direction of the through hole 22 are parallel to the width direction of the FPC 4. . Each boss 23 corresponds to a “convex portion” described in the claims. It is sufficient that at least one of the two bosses 23 is provided.

  As shown in FIG. 3, the peripheral wall 24 includes a pair of first wall portions 24a and 24b that position the through hole 22 therebetween, and a pair of second wall portions 24c and 24d that connect the wall portions 24a and 24b to each other. And is formed in a frame shape. The dimensions of the first wall portions 24a and 24b in the arrow Y direction are larger than the dimensions of the second wall portions 24c and 24d in the arrow X direction, and the peripheral wall 24 is formed in a rectangular shape in plan view. Further, a locking projection 25 that locks in a locking hole 83 (described later) of the counterpart housing 8 is provided on the outer surface of one of the pair of first wall portions 24 a and 24 b.

  As shown in FIG. 3, the winding portion 3 is provided at a body wall portion 31 perpendicular to the front side surface of the base wall 21 and at both ends of the body wall portion 31 in the arrow Y direction. A pair of side wall portions 32 connected to the two inner surfaces 22c and 22d are integrally provided. That is, the winding part 3 is erected from the edge of the through hole 22.

  The main body wall portion 31 is formed with a semicircular cross section at a distal end portion 3a away from the base wall 21 of the main body wall portion 31. As shown in FIG. 5, the tip of the main body wall portion 31 is located at a position lower than the peripheral wall 24, that is, below.

  Further, as shown in FIG. 5, the main body wall portion 31 is a pair that is inclined in a direction away from the first inner surfaces 22 a and 22 b of the through hole 22 toward the base end 3 b on the base wall 21 side of the main body wall portion 31. Taper 3c. The pair of tapers 3 c is provided in the through hole 22. Since this pair of tapers 3c is provided, the opening between each first inner surface 22a, 22b and each taper 3c becomes large, and the FPC 4 can be easily inserted into a slit 29 described later. The main body wall 31 is formed with a flat base end 3b.

  Further, as shown in FIG. 5, the main body wall 31 and the first inner surfaces 22a and 22b are spaced from each other. For this reason, a pair of slits 29 for inserting an FPC is formed between the main body wall portion 31 and the first inner surfaces 22a and 22b. The slits 29 are open on the surface side of the base wall 21 and extend in the longitudinal direction of the through hole 22. Has been. The pair of slits 29 are provided on both sides of the winding portion 3 in the arrow X direction. The pair of slits 29 communicate with the through hole 22.

  The rib 26 includes four partition walls 26a as shown in FIG. These partition walls 26a are formed in the same shape, and the ribs 26 are formed in a rectangular shape in plan view. As shown in FIG. 6, liquid silicone is poured into the ribs 26 to fill the ribs 26, and the liquid silicone is elastically cured, so that the boss 23. The cover part 6 which embed | buried etc. is formed. Since this cover part 6 further covers the through hole 22 of the base wall 21 closed by the plug part 5, liquid such as water enters the front side of the base wall 21 and the back side of the base wall 21 from the through hole 22. Can be surely prevented.

  As shown in FIG. 4, the frame portion 27 includes four outer walls 27a. These outer walls 27a are formed in the same shape, and the ribs 26 are formed in a rectangular shape in plan view.

  As shown in FIG. 7, the FPC 4 has a plurality of conductors 40 and a covering portion 41 that covers the conductors 40 and is formed in a flat belt shape. The conductor 40 is made of a conductive metal containing at least copper or a copper alloy. The conductor 40 has a rectangular cross-sectional shape, and a plurality of conductors 40 extend in parallel to each other. The covering portion 41 is made of an insulating synthetic resin, is formed in a flat belt shape, and covers the conductor 40. Further, the covering portion 41 electrically insulates the plurality of conductors 40 from each other. The FPC 4 corresponds to a “flat circuit body” recited in the claims. In the present specification, the “flat circuit body” means a flat belt body that includes a plurality of conductors 40 and a covering portion 41 that covers the conductors 40. As the “flat circuit body”, an FFC (flexible flat cable) can be used instead of the FPC 4.

  As shown in FIG. 7, the FPC 4 is provided with two holes 42 that fit into the two bosses 23 of the housing 2 described above. The two hole portions 42 are provided at an interval in the width direction of the FPC 4. Each hole 42 is a perfect circle. The two holes 42 are provided at one end of the FPC 4. Further, on the other end side of the hole portion 42 of the FPC 4, there are two bent portions 4a and 4b bent in an L shape, and a U-shaped folded portion 43 between the two bent portions 4a and 4b. Is provided. Of the folded portion 43, the conductor 40 is exposed to the outside at the portion where the terminal 9 of the mating connector 7 to be described later contacts. The folded portion 43 is wound around the winding portion 3.

  The plug portion 5 is made of an elastic body such as rubber. Further, as shown in FIG. 8, the plug portion 5 includes a pair of first surfaces 5a and 5b facing each other and a pair of second surfaces 5c connected to both edges a in the width direction of the surfaces 5a and 5b. 5d and a pair of third surfaces 5e and 5f connected to both longitudinal edges b of the surfaces 5a, 5b, 5c and 5d are formed in a rectangular column shape. Each said surface 5a, 5b, 5c, 5d is formed in the rectangular shape. The plug portion 5 is formed such that the dimension of the edge a is larger than the dimension of the through hole 22 in the longitudinal direction, the dimension of the edge b is larger than the dimension of the through hole 22 in the width direction, and the second surface 5c. The area of 5d is larger than the through hole 22.

  As shown in FIG. 1, the plug portion 5 is one of a pair of second surfaces 5c and 5d in a state where the plug portion 5 is pressed into the through hole 22 and compressed so as to close the through hole 22 of the base wall 21. The surface 5c contacts the base end 3b of the winding portion 3, and the first surfaces 5a and 5b elastically contact the first inner surfaces 22a and 22b of the through hole 22 by the compression reaction force of the plug portion 5, The third surfaces 5e and 5f are in elastic contact with the second inner surfaces 22c and 22d of the through hole 22, respectively. The stopper 5 elastically contacts the inner surfaces 22 a, 22 b, 22 c, 22 d of the through hole 22, so that liquid such as water enters the front side of the base wall 21 and the back side of the base wall 21 from the through hole 22. Can be surely prevented.

  Next, a procedure for assembling the FPC 4 to the housing 2 will be described below with reference to FIGS. 9, 10, 11, and 12. First, as shown in FIG. 9, the two holes 42 of the FPC 4 are fitted into the two bosses 23, and the other end of the FPC 4 away from the hole 42 of the FPC 4 is connected to the through hole 22 and one slit 29. Then, the FPC 4 is passed along the winding portion 3 through the other slit 29 and the through hole 22 along the winding portion 3, and the other end of the FPC 4 is connected to the substrate 21 as shown in FIG. The stopper 5 is press-fitted into the through hole 22 while pulling to the back side. In this way, as shown in FIG. 11, the elastic plug portion 5 is press-fitted into the through hole 22 and compressed, and the plug portion 5 causes the FPC 4 to pass through the first inner surfaces 22 a and 22 b of the through hole 22 by the compression reaction force. And elastically contact the second inner surfaces 22c and 22d. Thus, as shown in FIG. 12, the FPC 4 is assembled to the housing 2 without looseness.

  As shown in FIGS. 2 and 13, the mating connector 7 includes a plurality (three in the illustrated example) of terminals 9, a terminal accommodating chamber 81 for accommodating these terminals 9, and an electric wire 10 connected to each terminal 9. And a counterpart housing 8 having a wire housing chamber 85 (shown in FIG. 2).

  Each of the terminals 9 includes a pair of wire connection portions 91 connected to each of the pair of wires 10, and each elastic contact piece 92 connected to each of the pair of wire connection portions 91. The pair of elastic contact pieces 92 electrically connect the terminal 9 and the FPC 4 by sandwiching the winding portion 3 and the folded portion 43 of the FPC 4 described above between each other. The terminals 9 are arranged at intervals, and each pair of elastic contact pieces 92 is provided in a direction (arrow X direction) orthogonal to the direction in which the terminals 9 are arranged (arrow Y direction).

  As shown in FIG. 13, the counterpart housing 8 includes a counterpart housing main body 80 having a terminal accommodating chamber 81 and an electric wire accommodating chamber 85 (shown in FIG. 2) connected to the terminal accommodating chamber 81, and the counterpart housing main body 80. And a cylindrical outer wall 82 that surrounds. The outer wall 82 has a locking hole 83 for locking the locking projection 25 provided on the peripheral wall 24 of the connector, and a pair of holes provided on both sides of the locking hole 83, with the edges of the outer wall 82 cut out. And a slit 84.

  Next, a procedure for assembling the connector 2 ′ having the above-described configuration will be described below. First, a housing in which a base wall 21 provided with a through-hole 22, two bosses 23, a peripheral wall 24, a winding part 3, a rib 26, and a frame part 27 are integrally formed by known injection molding. Get 2. The cover 2 is formed by arranging the FPC 4 in the housing 2, press-fitting the plug 5 into the through-hole 22, pouring liquid silicone into the rib 26, and curing the silicone at room temperature. Thus, the connector 2 'is assembled.

  Next, a procedure for fitting the connector 2 'and the mating connector 7 will be described with reference to FIG. First, the peripheral wall 24 of the connector is inserted along the arrow Z between the counterpart housing body 80 and the outer wall 82 of the counterpart connector 7, and the winding portion 3 and the folded portion 43 of the FPC 4 are sandwiched by the pair of elastic contact pieces 92. . The locking projection 25 is locked in the locking hole 83. Thus, the FPC 4 and the terminal 9 of the counterpart connector 7 are electrically connected, and the connector 2 ′ and the counterpart connector 7 are fitted.

  According to the above-described embodiment, the hole portion 42 of the FPC 4 as the flat circuit body is fitted into the boss 23 as the convex portion of the housing 2, and the FPC 4 is bridged along the winding portion 3 and pulled to the back side of the base wall 21. In this state, when the elastic plug portion 5 is press-fitted into the through hole 22, the plug portion 5 is press-fitted into the through hole 22 and compressed, and the FPC 4 is compressed by the compression reaction force to the first inner surface 22 b of the through hole 22. It is possible to prevent the FPC 4 from being loosened between the FPC 4 and the winding portion 3, and to prevent poor contact between the FPC 4 and the counterpart terminal 9 and to prevent the FPC 4 from being damaged. can do. Further, liquid such as water can be prevented from entering the front side of the base wall 21 and the back side of the base wall 21 from the through hole 22.

  The through hole 22 has first inner surfaces 22a and 22b that are long sides along the flat circuit body width direction, and second inner surfaces 22c and 22d that are short sides along the flat circuit body longitudinal direction. The elastic plug portion 5 is pressed into the through hole 22 and compressed, and the compression reaction force causes the plug portion 5 to have a first inner surface 22a, 22b (long side portion) and a second inner surface 22c, 22d (short side). Therefore, the plug 5 closes the through hole 22 without a gap, and liquid such as water enters the front side of the base wall 21 and the back side of the base wall 21 from the through hole 22. Can be surely prevented.

  Also, ribs 26 are erected on the base wall 21 so as to surround the through holes 22 and the protrusions 23, and silicone is poured into the ribs 26, so that the silicone is filled into the frame-shaped ribs 26. It is hardened elastically when installed at room temperature, and it is possible to reliably prevent loosening between the FPC 4 and the winding part 3 due to vibrations while the automobile is running, etc. Intrusion into the front side of the base wall 21 and the back side of the base wall 21 from 22 can be further reliably prevented.

  In the above-described embodiment, the connector 2 ′ includes the cover portion 6 formed by pouring silicone into the rib 26, but the present invention is not limited to this, and the cover portion 6 is not limited thereto. Is not necessary.

  Moreover, in embodiment mentioned above, although connector 2 'comprises a part of wire harness which connects the vehicle-mounted camera which is an electrical component of a motor vehicle, in addition to a camera, for example, the connector which comprises a wire harness The present invention can also be applied to the case where the device direct connection connector is connected.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Assembling structure of flat circuit body 2 Housing 2 'Connector 3 Winding part 3b Base part (end part) of winding part
4 FPC (Flat Circuit Body)
5 Plug part 8 Counterpart housing 21 Base wall 22 Through-hole 22a 1st inner surface (long side part)
22b 1st inner surface (the inner surface of a through-hole, long side part)
22c, 22d (a pair of) second inner surfaces (a pair of short sides)
23 Boss (convex)
24 Peripheral wall 26 Rib 29 (A pair of) slit 42 Hole Z Projection direction

Claims (3)

A base wall provided with a through-hole, at least one convex portion provided on the back side surface of the base wall, a peripheral wall provided on the front side surface of the base wall for fitting a mating housing, and the through-hole A housing having a winding portion standing from an edge and protruding into the peripheral wall, and a pair of slits for inserting a flat circuit body provided on the base wall on both sides of the winding portion;
A flat circuit body provided with a hole that fits into the convex part;
An elastic plug portion that is press-fitted into the through-hole and abuts against an end of the winding portion on the base wall side;
With
In the state where the flat circuit body is inserted through one of the slits and spanned along the winding portion, inserted through the other slit and fitted into the convex portion, and pulled to the back side of the base wall. The flat circuit body assembly structure is characterized in that the flat circuit body is pressed against the inner surface of the through-hole by press-fitting the plug portion into the through-hole.   The through hole has a pair of long side portions including the inner surface along the flat circuit body width direction, and a pair of short side portions along the flat circuit body longitudinal direction, and the plug portion includes the long side portion and the long side portion. 2. The flat circuit body assembly structure according to claim 1, wherein the flat circuit body assembly structure is formed in a rectangular column shape that elastically contacts the short side portion.   3. The flat circuit assembly according to claim 1, wherein a rib is provided on the base wall so as to surround the through hole and the convex portion, and silicone is poured into the rib. Attached structure.

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