connector

Abstract

To provide a connector which can prevent foreign objects from entering a rear side of a hood part and secure strength of an opening side of the hood part.SOLUTION: A connector 10 comprises a hood part 16 where a counterpart-side connector P can be fitted inside thereof. When an opening side of the hood part 16 is defined as a front side and a side opposite to the opening side is defined as a rear side, the hood part 16 has: a flange part 16A which is formed in a flange shape at an outer circumference of an end edge on the front side; a second flange part 16B which is disposed facing the flange part 16A from the rear side; and a groove part 16C which is formed between the second flange part 16B and the flange part 16A and in which a plate-like case 80 is fit.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to connectors. [Background technology]

[0002] Patent Documents 1 and 2 disclose a configuration in which a hood section formed into a rectangular tube shape with four wall sections is sandwiched vertically between an upper case and a lower case. This hood section has a recess formed in it that extends circumferentially (i.e., around the four wall sections) and is recessed inward, and protrusions provided on the upper case and lower case fit into this recess, thereby preventing foreign matter from entering the interior. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-70855 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-123558 Summary of the Invention [Problem to be solved by the invention]

[0004] The hood portions of the connectors in Patent Documents 1 and 2 are arranged to protrude outside the upper and lower cases. This raises concerns that foreign matter may move along the outer surfaces of the hood portion toward the upper and lower cases and enter the interior of the cases. Furthermore, when a mating connector is mated to the hood portion, there is a concern that the front end of the hood portion (the edge on the opening side) may be deformed and spread open when the wires pulled out from the mating connector vibrate or are pulled up.

[0005] Therefore, an object of the present disclosure is to provide a connector that can prevent the intrusion of foreign matter and ensure the strength of the opening side of the hood portion. [Means for solving the problem]

[0006] The connector of the present disclosure comprises: It has a hood part inside which the mating connector can be fitted, When the opening side of the hood portion is defined as the front side and the side opposite to the opening side is defined as the rear side, The hood portion is a flange portion formed in a brim shape on the outer periphery of the front edge; an opposing portion disposed opposite the flange portion from the rear side; The housing has a groove formed between the opposing portion and the flange portion, into which a plate-shaped case is fitted. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to prevent foreign matter from entering the rear side of the hood portion, and to ensure the strength of the opening side of the hood portion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a connector according to a first embodiment. [Figure 2] FIG. 2 is a front view of the connector with the case attached. [Figure 3] FIG. 3 is a rear view of the connector. [Figure 4] FIG. 4 is a side view of the connector with the case attached. [Figure 5] FIG. 5 is a side view of a connector according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The connector of the present disclosure comprises: (1) The connector is provided with a hood portion into which a mating connector can be fitted. When the open side of the hood portion is defined as the front side and the side opposite the open side as the rear side, the hood portion has a flange portion, a facing portion, and a groove portion. The flange portion is formed in a brim shape on the outer periphery of the front edge. The facing portion is positioned opposite the flange portion from the rear side. The groove portion is formed between the facing portion and the flange portion, and a plate-shaped case fits into the groove portion.

[0010] According to this configuration, the plate-shaped case fits into the groove, allowing the case to fit between the flange portion and the opposing portion. As a result, foreign matter can be prevented from entering the case from between the flange portion and the opposing portion. In particular, because the flange portion is formed on the front edge (opening end) of the hood portion, the intrusion of foreign matter can be quickly prevented. Furthermore, the front edge (opening end) of the hood portion is reinforced not only by the flange portion but also by the case sandwiched in the groove. As a result, deformation of the front edge of the hood portion can be suppressed when the electric wires drawn from the mating connector mated inside the hood portion vibrate or are pulled up.

[0011] (2) The facing portion is preferably a second flange portion formed in a brim shape on the outer periphery of the hood portion rearward of the front edge thereof.

[0012] According to this configuration, the depth of the groove can be increased, allowing for a deeper recess-projection fit with the plate-shaped case, further reducing the chance of foreign matter entering the inside of the case.

[0013] (3) The hood portion has four outer surfaces of a rectangular cylindrical shape, one of which is a mounting surface for mounting to a circuit board. The flange portion and the second flange portion are preferably formed on three of the four outer surfaces: a pair of side surfaces excluding the mounting surface, and an end surface opposite the mounting surface.

[0014] This configuration prevents foreign matter from entering the case along any of the three outer surfaces. Even if a foreign matter attempts to enter the case along the mounting surface, it can be prevented by hitting the front end of the circuit board.

[0015] (4) The flange portion and the second flange portion preferably have a lateral flange portion and a second lateral flange portion on each side surface, and the lateral flange portion and the second lateral flange portion preferably have a shape that increases the amount of protrusion outward from the side surface from the end surface side toward the mounting surface side.

[0016] When the flange portion and the second flange portion are formed on three sides of the outer periphery of the hood portion, the case has a concave opening (hereinafter simply referred to as the opening) that fits into the three sides of the outer periphery of the hood portion. Here, it is preferable that the opening side of the opening of the case is wider than the inner side. With this configuration, the opening side edge of the opening of the case can be sandwiched between the side flange portion and the second side flange portion. As a result, a concave-convex fit can be achieved by positioning the opening side edge of the opening between the side flange portion and the second side flange portion.

[0017] (5) It is preferable that the side surface of the hood portion has a press-fit portion into which a fixing member for fixing the hood portion to the circuit board is press-fitted, and that the front end of the press-fit portion is integrally connected to the second flange portion.

[0018] With this configuration, the press-fit portion is reinforced by the second flange portion, so the fixing member can be held properly. Also, because the second flange portion is reinforced by the press-fit portion, deformation of the second flange portion due to contact with the case can be prevented.

[0019] (6) It is preferable that the case contacts at least one of the rear surface of the flange portion and the front surface of the second flange portion.

[0020] This configuration can more reliably prevent foreign matter from entering the case.

[0021] [Details of the embodiments of the present disclosure] <Embodiment 1> The connector 10 to be installed on the circuit board 90 will be described with reference to Figs. 1 to 4. In the drawings, "front side," "rear side," "upper side," "lower side," "right side," and "left side" are represented by "F," "B," "U," "D," "R," and "L," respectively. In the following description, the direction in which the mating connector P is mated with the connector 10 is defined as the mating direction (front-rear direction) (see Fig. 4). In the present embodiment 1, the left-right direction corresponds to the width direction.

[0022] The connector 10 according to the first embodiment includes a housing 11, a fixing member 12, and a plurality of terminal fittings 13 (see FIG. 1). The connector 10 is covered by a case 80 when mounted on a circuit board 90, except for the front side, which is the mating side with a mating connector P (see FIG. 2).

[0023] Configure Connector The housing 11 is made of synthetic resin. As shown in FIG. 1 , the housing 11 has a wall portion 15 extending in the left-right direction and with its thickness oriented in the front-rear direction, and a hood portion 16 projecting forward in a rectangular cylindrical shape from the outer edge of the wall portion 15. A mating connector P can be fitted inside the hood portion 16 (see FIG. 4 ). The opening side of the hood portion 16 is located on the front side, and the side opposite the opening side of the hood portion 16 (the wall portion 15 side) is located on the rear side. The hood portion 16 has an upper wall 17 and a lower wall 18 arranged in a pair above and below, and side walls 19 arranged in a pair above and below. Each of the upper wall 17 and the lower wall 18 has a plurality of inner walls 24 on its inner surface that protrude into the hood portion 16. The wall portion 15 has a plurality of through holes 26 penetrating in the thickness direction (front-rear direction) (see FIG. 2 ). Terminal fittings 13 are attached to each through hole 26 from the rear by press-fitting or inserting.

[0024] The upper surface of the upper wall 17 is an end surface 22A. The lower surface of the lower wall 18 is a mounting surface 22B (see FIGS. 2 and 4). The mounting surface 22B is the surface that faces and comes into contact with the surface 90A of the circuit board 90 when the connector 10 is mounted on the circuit board 90.

[0025] Each side wall 19 has a side surface 22C (see FIG. 3). Each side surface 22C faces outward in the left-right direction. Each side surface 22C is provided with a press-fit portion 27 that protrudes outward in the width direction. The press-fit portions 27 on each side surface 22C are divided into a front side and a rear side. Each of the front and rear press-fit portions 27 on each side surface 22C has a slit-shaped groove 28 cut into the inner surface facing each other in the front and rear (see FIG. 4). A fixing member 12, which will be described later, is press-fitted from above and held in the groove 28.

[0026] The hood portion 16 further includes a flange portion 16A, a second flange portion 16B (opposing portion), and a groove portion 16C. The flange portion 16A is formed so as to protrude like a brim from the outer periphery of the front edge of the hood portion 16. The flange portion 16A also includes side flange portions 16E. The flange portion 16A and the side flange portions 16E are each formed as a single, flush, flat plate. The flange portion 16A and the side flange portions 16E are formed on three of the four outer periphery surfaces of the hood portion 16: a pair of side surfaces 22C, excluding the mounting surface 22B, and the end surface 22A located opposite the mounting surface 22B. The side flange portions 16E are provided on each side surface 22C so as to protrude outward in the left-right direction. The front surface of the flange portion 16A defines the opening surface of the hood portion 16.

[0027] The second flange portion 16B is positioned rearward of the flange portion 16A and faces the flange portion 16A at a distance from the rear. The second flange portion 16B is formed to protrude like a brim from the outer periphery rearward of the front edge of the hood portion 16. The second flange portion 16B has second lateral flange portions 16D. The second flange portion 16B and the second lateral flange portions 16D are formed as a single, flush plate. The second flange portion 16B and the second lateral flange portions 16D are formed on three of the four outer periphery surfaces of the hood portion 16, excluding the mounting surface 22B: a pair of side surfaces 22C, and an end surface 22A located opposite the mounting surface 22B (see FIG. 3). The second lateral flange portions 16D are provided on each side surface 22C so as to protrude outward in the left-right direction (see FIG. 3).

[0028] The side flange portion 16E and the second side flange portion 16D are formed so that the amount of outward protrusion in the left-right direction gradually increases from the end face 22A side toward the mounting face 22B side (see FIGS. 2 and 3).

[0029] Groove portion 16C is formed between flange portion 16A and second flange portion 16B. Groove portion 16C is a portion that is recessed relatively from the tip of flange-shaped flange portion 16A and flange-shaped second flange portion 16B in the protruding direction.

[0030] The fixing member 12 is a metal plate and is attached to each groove 28 of the housing 11. The fixing member 12 has a housing attachment portion 33 that is arranged along the side surface 22C with the plate surface facing the width direction, and a board fixing portion 34 that extends downward from the lower end of the housing attachment portion 33 in a comb-like shape.

[0031] The front and rear ends of the housing attachment portion 33 are fitted into grooves 28 formed in the press-fit portion 27 (see FIG. 4). This causes the fixing member 12 to be held in the hood portion 16 of the housing 11. The board fixing portion 34 is inserted into a through-hole (not shown) formed in the circuit board 90 and is fixed to the circuit board 90 by soldering. The hood portion 16 is fixed to the circuit board 90 via the fixing member 12.

[0032] The multiple terminal fittings 13 are male terminal fittings, and are formed by stamping, bending, and the like, a conductive metal plate. Each terminal fitting 13 is inserted into a corresponding through-hole 26 from the rear and is held in a state in which it penetrates the corresponding through-hole 26. A tab 13A is provided at the tip (front end) of each terminal fitting 13. Each tab 13A is housed in a hood portion 16. When the connector 10 is mated with a mating connector P, each tab 13A is connected to a mating terminal (not shown) of the mating connector P. The rear end of each terminal fitting 13 is inserted into an insertion hole formed in the circuit board 90 and connected to the back surface 90B of the circuit board 90 by soldering.

[0033] 4, the connector 10 thus formed is attached with the mounting surface 22B facing the front surface 90A of the circuit board 90. The connector 10 is positioned so that the flange portion 16A and the second flange portion 16B protrude forward beyond the front edge of the circuit board 90.

[0034] [About the case] In the first embodiment, the case 80 is made of die-cast metal. As shown in FIG. 2, the case 80 has an upper case 80A and a lower case 80B. The upper case 80A and the lower case 80B sandwich the circuit board 90, to which the connector 10 is attached, from above and below. The flat front wall 80C of the upper case 80A has a rectangular recessed opening 80D cut out to match the contour of the groove 16C of the connector 10. The thickness of the front wall 80C of the upper case 80A faces the front-to-rear direction. Considering that the upper case 80A is made of die-cast metal, the opening 80D is formed so that its left-to-right dimension gradually increases from the innermost (upper) portion of the upper case 80A toward the circuit board 90 side (lower side). This improves the mold releasability of the case 80. When viewed from the front, the opening 80D has a trapezoidal shape.

[0035] The upper case 80A is attached to the surface 90A of the circuit board 90 so as to cover the connector 10. As shown in FIG. 4, the front wall 80C fits into the groove 16C between the rear surface of the flange 16A and the front surface of the second flange 16B. The thickness of the front wall 80C is smaller than the distance between the rear surface of the flange 16A and the front surface of the second flange 16B. In the first embodiment, the rear surface of the front wall 80C contacts the front surface of the second flange 16B from the front. This determines the position of the case 80 in the front-to-rear direction relative to the connector 10. This also reliably prevents foreign matter from entering the case 80 from the outside via the second flange 16B. In this way, the rear surface of the flange 16A, the second flange 16B, and the front wall 80C fit together. The front end of the housing 11 faces the front of the case 80 through an opening 80D formed in the front wall 80C of the case 80.

[0036] 2 and 3, the side flanges 16E and the second side flanges 16D are formed so that the amount of outward protrusion in the left-right direction gradually increases as they approach the mounting surface 22B from the end face 22A. Therefore, even if the opening 80D is formed so that the left-right dimension gradually increases from the innermost (upper) portion of the case 80 toward the circuit board 90 (lower), the left-right sides of the side flanges 16E, the second side flanges 16D, and the opening 80D are reliably fitted together. Furthermore, the innermost surface (i.e., the side surface 22C) of the groove 16C formed in the side wall 19 is formed so that it gradually widens outward in the left-right direction as it approaches the mounting surface 22B from the end face 22A, similar to the side flanges 16E and the second side flanges 16D (see FIG. 2). This allows the inner surfaces of the grooves 16C of the side walls 19 to fit along the edges of both the left and right sides of the opening 80D, thereby reducing the gap formed between the upper case 80A and the housing 11.

[0037] The lower case 80B is attached to the back surface 90B of the circuit board 90. The lower case 80B is disposed on the opposite side of the upper case 80A with the circuit board 90 in between. A rib 80E that is long in the left-right direction and protrudes upward is provided at the front end of the lower case 80B (see FIGS. 2 and 4). The rib 80E is disposed so as to cover the front end of the circuit board 90 from the front, and its tip is disposed so as to face the mounting surface 22B of the hood portion 16 (see FIG. 4). The tip of the rib 80E contacts the lower end of the front wall 80C outside the opening 80D in the left-right direction (see FIG. 2).

[0038] In the first embodiment, the mounting surface 22B and the surface 90A of the circuit board 90 are in contact with each other, and the distance is set to less than 1.0 mm. The rear surface of the front wall 80C contacts the front surface of the second flange portion 16B from the front. Therefore, in the first embodiment, foreign objects with a diameter of 1.0 mm or more can be prevented from entering the case 80.

[0039] Next, the operation of the first embodiment will be described. The connector 10 includes a hood portion 16 into which a mating connector P can be mated. When the open side of the hood portion 16 is defined as the front side and the opposite side as the rear side, the hood portion 16 has a flange portion 16A, a second flange portion 16B, and a groove portion 16C. The flange portion 16A is formed in a brim-like shape on the outer periphery of the front edge. The second flange portion 16B is positioned facing the flange portion 16A from the rear side. The groove portion 16C is formed between the second flange portion 16B and the flange portion 16A, and a front wall 80C of a plate-shaped case 80 fits into the groove portion 16C. With this configuration, the plate-shaped case 80 fits into the groove portion 16C, allowing the case 80 to fit between the flange portion 16A and the second flange portion 16B. As a result, foreign matter can be prevented from entering the case 80 between the flange portion 16A and the second flange portion 16B. In particular, since flange portion 16A is formed on the front edge (opening edge) of hood portion 16, it is possible to quickly prevent the intrusion of foreign matter. Furthermore, the front edge (opening edge) of hood portion 16 is reinforced not only by flange portion 16A but also by case 80 sandwiched in groove portion 16C. As a result, deformation of the front edge of hood portion 16 can be suppressed when the electric wires drawn from the mating connector P mated inside hood portion 16 vibrate or are pulled up.

[0040] The opposing portion is second flange portion 16B formed in a brim shape on the outer periphery rearward of the front edge of hood portion 16. With this configuration, groove portion 16C can be made deeper, allowing for a deeper concave-convex fit with plate-shaped case 80, further reducing the chance of foreign matter entering the inside of case 80.

[0041] The hood portion 16 has four outer peripheral surfaces that form a rectangular tube, one of which is a mounting surface 22B that is mounted on the circuit board 90. The flange portion 16A and the second flange portion 16B are formed on three of the four outer peripheral surfaces: a pair of side surfaces 22C excluding the mounting surface 22B, and an end surface 22A located opposite the mounting surface 22B. This configuration makes it possible to prevent foreign matter from entering the case 80 along any of the three outer peripheral surfaces. Even if a foreign matter attempts to enter the case 80 along the mounting surface 22B, it can be prevented by the foreign matter hitting the front end of the circuit board 90.

[0042] The flange portion 16A and the second flange portion 16B have side flange portions 16E and second side flange portions 16D on each side surface 22C. The side flange portions 16E and second side flange portions 16D are shaped so that they protrude outward from the side surface 22C from the end surface 22A toward the mounting surface 22B. When the flange portions 16A and the second flange portions 16B are formed on three sides of the outer periphery of the hood portion 16, the case 80 has an opening 80D that fits into the three outer periphery surfaces of the hood portion 16. Preferably, the opening side of the opening 80D of the case 80 is wider than the inner side. With this configuration, the opening end of the opening 80D in the case 80 can be sandwiched between the side flange portions 16E and the second side flange portions 16D. As a result, a concave-convex fit can be achieved by positioning the opening end of the opening 80D between the side flange portions 16E and the second side flange portions 16D.

[0043] Side surface 22C of hood portion 16 has press-fit portion 27 into which fixing member 12 that fixes hood portion 16 to circuit board 90 is press-fitted, and the front end of press-fit portion 27 is integrally connected to second flange portion 16B. With this configuration, press-fit portion 27 is reinforced by second flange portion 16B, so that fixing member 12 can be properly held. In addition, because second flange portion 16B is reinforced by press-fit portion 27, deformation of second flange portion 16B due to contact with case 80 can be prevented.

[0044] The front wall 80C of the case 80 is in contact with the front surface of the second flange portion 16B. With this configuration, foreign matter can be prevented from entering the case 80 more reliably.

[0045] [Another embodiment of the present disclosure] The present disclosure is not limited to the first embodiment described above and illustrated in the drawings. The present invention includes all modifications within the scope of the claims and meanings equivalent to those of the claims, and is intended to include the following embodiments. (1) Unlike the first embodiment, as shown in Fig. 5, the thickness of the upper wall 117 and the pair of side walls 119 may be increased to form the groove portion 116C so as to be recessed inward. In other words, the second flange portion does not need to be provided. In this case, the thickened upper wall 117 and the pair of side walls 119 correspond to the opposing portions. (2) Unlike the first embodiment, the flange portion and the second flange portion may also be formed on the mounting surface. In other words, the flange portion and the second flange portion may be formed on all four sides of the outer periphery of the hood portion. (3) Unlike the first embodiment, the front wall of the case may be configured to contact the rear surface of the flange portion. Also, the front wall of the case may be configured to contact the rear surface of the flange portion and the front surface of the second flange portion. (4) Unlike the first embodiment, the distance between the mounting surface and the surface of the circuit board is less than 1.0 mm. Not Good too. [Explanation of symbols]

[0046] 10...Connector 11. Housing 12...Fixing member 13...Terminal fitting 13A...Tab 15...Wall part 16...Hood section 16A...Flange part 16B...Second flange portion (opposing portion) 16C,116C…Groove 16D...Second side flange 16E...Side flange 17,117…Upper wall 18...Lower wall 19,119…Side wall 22A…End face 22B...Mounting surface 22C...side 24…Inner wall 26...Through hole 27...Press-fit part 28...Groove 33...Housing attachment part 34...Board fixing part 80…cases 80A...Upper case 80B...Lower case 80C…Front wall 80D...Opening 80E...Rib 90...Circuit board 90A…Surface 90B…Back side P: Mating connector

Claims

1. It has a hood part inside which the mating connector can be fitted, The hood portion is integrally formed, When the opening side of the hood portion is defined as the front side and the side opposite to the opening side is defined as the rear side, The hood portion is a flange portion formed in a brim shape on the outer periphery of the front edge; an opposing portion disposed opposite the flange portion from the rear side; a groove formed between the opposing portion and the flange portion, into which a plate-shaped case is fitted; and the opposing portion is a second flange portion formed in a brim shape on an outer periphery of the hood portion rearward of the front end edge, The hood portion has four outer surfaces formed in a rectangular cylindrical shape, one of which is a mounting surface to be mounted on a circuit board, A connector in which the flange portion and the second flange portion are formed on three of the four outer periphery surfaces: a pair of side surfaces excluding the mounting surface, and an end surface located opposite the mounting surface.

2. It has a hood part inside which the mating connector can be fitted, The hood portion is integrally formed, When the opening side of the hood portion is defined as the front side and the side opposite to the opening side is defined as the rear side, The hood portion is a flange portion formed in a brim shape on the outer periphery of the front edge; an opposing portion disposed opposite the flange portion from the rear side; a groove formed between the opposing portion and the flange portion, into which a plate-shaped case is fitted; and the hood portion has a mounting surface to be mounted on a circuit board, an end surface located opposite the mounting surface, and a pair of side surfaces connected to the mounting surface and the end surface, the side surface is an outer surface of a side wall that constitutes the hood portion, A connector in which the outer surface of the side wall of the groove is formed so as to gradually widen from the inside of the hood portion outward as it approaches the mounting surface from the end face side.

3. A hood portion is provided inside which a mating connector can be fitted, When the opening side of the hood portion is defined as the front side and the side opposite to the opening side is defined as the rear side, The hood portion is a flange portion formed in a brim shape on the outer periphery of the front edge; an opposing portion disposed opposite the flange portion from the rear side; a groove formed between the opposing portion and the flange portion, into which a plate-shaped case is fitted; and the opposing portion is a second flange portion formed in a brim shape on an outer periphery of the hood portion rearward of the front end edge, The hood portion has four outer surfaces formed in a rectangular cylindrical shape, one of which is a mounting surface to be mounted on a circuit board, the flange portion and the second flange portion are formed on three of the four outer periphery surfaces, that is, a pair of side surfaces excluding the mounting surface and an end surface located opposite the mounting surface, the flange portion and the second flange portion have a side flange portion and a second side flange portion on each of the side surfaces, The side flange portion and the second side flange portion are shaped so that the amount of outward protrusion of the side surface increases from the end face side toward the mounting surface side.

4. A hood portion is provided inside which a mating connector can be fitted, When the opening side of the hood portion is defined as the front side and the side opposite to the opening side is defined as the rear side, The hood portion is a flange portion formed in a brim shape on the outer periphery of the front edge; an opposing portion disposed opposite the flange portion from the rear side; a groove formed between the opposing portion and the flange portion, into which a plate-shaped case is fitted; and the opposing portion is a second flange portion formed in a brim shape on an outer periphery of the hood portion rearward of the front end edge, The hood portion has four outer surfaces formed in a rectangular cylindrical shape, one of which is a mounting surface to be mounted on a circuit board, the flange portion and the second flange portion are formed on three of the four outer periphery surfaces, that is, a pair of side surfaces excluding the mounting surface and an end surface located opposite the mounting surface, the side surface of the hood portion has a press-fit portion into which a fixing member that fixes the hood portion to the circuit board is press-fitted, A connector in which a front end of the press-fit portion is integrally connected to the second flange portion.

5. 4. The connector according to claim 1, wherein the case is in contact with at least one of a rear surface of the flange portion and a front surface of the second flange portion.

6. 5. The connector according to claim 4, wherein the case is in contact with at least one of a rear surface of the flange portion and a front surface of the second flange portion.

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