Shielded connector

Abstract

To provide a shielded connector that can prevent a mounting portion from being left unsoldered.SOLUTION: A shielded connector 10 comprises: an inner conductor 11, 12; an outer conductor 13, 14, 15 that surrounds the inner conductor 11, 12; and a dielectric 16, 17 disposed between the inner conductor 11, 12 and the outer conductor 13, 14, 15. The substrate-side outer shell 14, which is a conductive rigid body, includes: a bottom surface 92; a back surface 93 intersecting with the bottom surface 92; a mounting portion 84 to 87 formed on the bottom surface 92 to be soldered to a circuit board 200; and a recessed part 91 spanning the back surface 93 and the bottom surface 92, and located in a vicinity of the mounting portion 84 to 87 on the bottom surface 92.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a shield connector.

Background Art

[0002] The shield connector described in Patent Document 1 is a coaxial connector installed on a circuit board. The shield connector includes a center contact (hereinafter referred to as an inner conductor), an outer contact and an outer conductor (hereinafter referred to as an outer conductor) surrounding the inner conductor, and an insulator (hereinafter referred to as a dielectric) disposed between the inner conductor and the outer conductor. The dielectric maintains an insulating state between the inner conductor and the outer conductor. The outer conductor is formed with mounting legs protruding and inserted into through-holes of the circuit board. Solder is filled between the mounting legs and the inner surface of the through-holes.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, on the bottom surface of the outer conductor, separately from the mounting legs, a mounting portion soldered to the surface of the circuit board may be formed. In this case, if the distance from the outer surface (back surface) of the outer conductor to the mounting portion is large, when performing reflow soldering, heat may not be transmitted to the mounting portion, and the solder (paste solder) corresponding to the mounting portion may not melt. As a result, there is a possibility that the mounting portion may be in an unsoldered state.

[0005] Therefore, an object is to provide a shield connector capable of preventing the mounting portion from being in an unsoldered state.

Means for Solving the Problems

[0006] The shielded connector of this disclosure comprises an inner conductor, an outer conductor surrounding the inner conductor, and a dielectric disposed between the inner conductor and the outer conductor, wherein the outer conductor is a conductive rigid body and has a bottom surface, a back surface intersecting the bottom surface, a mounting portion formed on the bottom surface and soldered to the surface of a circuit board, and a recessed portion extending from the back surface to the bottom surface and disposed near the mounting portion on the bottom surface. [Effects of the Invention]

[0007] This disclosure makes it possible to provide a shielded connector that can prevent the mounted portion from becoming unsoldered. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is an exploded perspective view of a shielded connector according to Embodiment 1 of this disclosure. [Figure 2] Figure 2 is a side cross-sectional view showing the mating state between the shield connector and the mating connector. [Figure 3] Figure 3 is a magnified plan cross-sectional view showing the state in which the press-fitting blade of the outer conductor tube is locked to the inner circumferential surface of the through-hole of the outer shell. [Figure 4] Figure 4 is a magnified cross-sectional view showing the state in which the retaining projection of the outer conductor tube contacts the inner circumferential surface of the through hole in the outer shell. [Figure 5] Figure 5 is a magnified cross-sectional view showing the state in which the housing-side retaining projection of the housing contacts the outer circumferential surface of the outer conductor tube. [Figure 6] Figure 6 is a magnified cross-sectional view showing the state in which the contact protrusion of the outer conductor tube contacts the regulating portion. [Figure 7] Figure 7 is a cross-sectional view taken along line AA in Figure 6. [Figure 8] Figure 8 is a side cross-sectional view showing an enlarged view of the internal structure of the outer conductor at the rear of the shielded connector. [Figure 9] Figure 9 is a rear view of the shield connector. [Figure 10]FIG. 10 is a rear view showing an enlarged solder joint state between the mounting portion visible through the recess and the circuit board. [Figure 11] FIG. 11 is a perspective view for explaining the assembling process of the outer housing with respect to the housing. [Figure 12] FIG. 12 is a perspective view for explaining the assembling process of the substrate-side outer housing with respect to the outer housing. [Figure 13] FIG. 13 is a perspective view of the shield connector. [Figure 14] FIG. 14 is a front view of the housing. [Figure 15] FIG. 15 is a rear view of the housing. [Figure 16] FIG. 16 is a bottom view of the housing. [Figure 17] FIG. 17 is a perspective view of the outer housing. [Figure 18] FIG. 18 is a rear view of the outer housing. [Figure 19] FIG. 19 is a perspective view showing an enlarged through-hole of the outer housing. [Figure 20] FIG. 20 is a perspective view of the substrate-side outer housing. [Figure 21] FIG. 21 is a perspective view of the substrate-side outer housing viewed from another angle. [Figure 22] FIG. 22 is a perspective view of the outer conductor tube. [Figure 23] FIG. 23 is a rear view of the outer conductor tube.

MODE FOR CARRYING OUT THE INVENTION

[0009] [Description of Embodiments of the Present Disclosure] First, the embodiments of the present disclosure will be listed and described. The shield connector of the present disclosure is (1) The outer conductor comprises an inner conductor, an outer conductor surrounding the inner conductor, and a dielectric disposed between the inner conductor and the outer conductor, wherein the outer conductor has a bottom surface, a back surface intersecting the bottom surface, a mounting portion formed on the bottom surface and soldered to the surface of a circuit board, and a recessed portion extending from the back surface to the bottom surface and disposed near the mounting portion on the bottom surface.

[0010] The above configuration allows the thermal conductivity resistance from the back of the outer conductor to the mounting area to be reduced by the recessed portion, which enables the solder corresponding to the mounting area to melt and prevents the mounting area from remaining unsoldered.

[0011] (2) The inner conductors are provided in multiple quantities, and the outer conductor has a back portion having the back surface and a partition portion connected to the back surface, and the partition portion is preferably arranged between adjacent inner conductors and partitions the recessed portion internally.

[0012] The above configuration allows for the formation of recessed portions uniformly within the partitioned section with a constant or near-constant thickness, thereby more effectively reducing the thermal resistance from the back of the outer conductor to the mounting section. In particular, crosstalk between adjacent inner conductors is suppressed by the partitioned section, and since the recessed portions are formed within the thickness of the partitioned section, it offers excellent space efficiency.

[0013] (3) The mounting portion described above should be positioned so that it can be seen through the recessed portion when viewed from the rear of the outer conductor.

[0014] With the above configuration, the solder joint state between the mounting part and the circuit board can be checked through the recessed portion.

[0015] [Details of the embodiments of this disclosure] Specific examples of this disclosure will be described below with reference to the drawings. However, the present invention is not limited to these examples and is intended to be included in the claims, with all modifications in the sense and scope equivalent to the claims.

[0016] <Embodiment 1> The shield connector 10 according to Embodiment 1 is a shield connector for a circuit board that is installed on a circuit board 200. As shown in Figures 1 and 2, the shield connector 10 comprises inner conductors 11, 12, outer conductors 13, 14, 15 that surround the outer circumference of the inner conductors 11, 12, dielectrics 16, 17 that are placed between the inner conductors 11, 12 and the outer conductors 13, 14, 15, and a housing 18 to which the outer conductors 13, 14, 15 are connected.

[0017] The outer conductors 13, 14, 15 and the inner conductors 11, 12 are conductive materials such as metal. The dielectrics 16, 17 and the housing 18 are insulating materials such as synthetic resin. The housing 18 is mated to the mating connector 300. In the following description, the front-to-back direction refers to the side of the housing 18 that faces the mating connector 300 when mated, which is the front side. In the up-to-down direction, the side on which the shield connector 10 is installed relative to the circuit board 200 is the upper side. The upper side in Figures 1 and 2 is the upper side. In Figures 1 and 2, the upper side is indicated by the symbol "U" and the front side is indicated by the symbol "F". In the following description, the up-to-down direction is synonymous with the height direction, and the front-to-back direction is synonymous with the axial direction. The left-to-right direction is the direction that intersects the front-to-back direction and the up-to-down direction, and is synonymous with the width direction.

[0018] (housing) As shown in Figure 11, the housing 18 has an overall rectangular external shape and comprises a housing body 19 and a hood 21 that protrudes forward from the housing body 19. As shown in Figures 14 and 15, the housing body 19 has a plurality of insertion holes 22 that penetrate in the front-to-back direction, four in this embodiment 1. Each insertion hole 22 has a circular cross-section and is arranged in pairs, one above the other, and aligned in the width direction.

[0019] As shown in Figure 15, a fitting recess 23 is formed on the rear surface of the housing body 19, with a shape that is recessed while leaving the central part of the housing body 19 intact. Multiple recessed ribs 24 are formed on the inner circumferential surface of the fitting recess 23.

[0020] The housing body 19 has a plurality of housing-side retaining protrusions 108 on the inner circumferential surface of each insertion hole 22. Each housing-side retaining protrusion 108 has an arc-shaped cross-section and is formed to extend along the entire length of each insertion hole 22. Each housing-side retaining protrusion 108 is provided at four locations on the inner circumferential surface of each insertion hole 22, viewed from the axial direction: upper right, lower right, upper left, and lower left, at equal intervals in the circumferential direction.

[0021] As shown in Figure 2, the front end of the outer conductor tube 15, which will be described later, is inserted into the insertion hole 22 of the housing body 19. As shown in Figure 5, each housing-side retaining projection 108 contacts the outer circumferential surface of the outer conductor tube 15.

[0022] As shown in Figure 15, a die-cut recess 26 is formed at the upper end of the housing body 19. The die-cut recess 26 is formed as a result of withdrawing a mold (not shown) that forms the housing lock portion 36, which will be described later. In addition, a pair of fitting holes 27 are formed on both the left and right sides of the die-cut recess 26 at the upper end of the housing body 19. As shown in Figure 2, the fitting holes 27 penetrate the upper end of the housing body 19 in the front-rear direction and communicate with the inside of the hood 21.

[0023] As shown in Figure 15, a pair of first locking projections 28 are formed at the rear end of the housing body 19, projecting into each fitting hole 27. Each first locking projection 28 faces the rear surface of the housing body 19 and protrudes toward the fitting recess 23. As shown in Figure 2, the first connecting projection 43 of the outer shell 13, which will be described later, contacts and locks to the front surface of the first locking projection 28.

[0024] As shown in Figures 15 and 16, the housing body 19 has a pair of housing side portions 31 that separate the left and right sides of the fitting recess 23. A pair of second locking projections 32 are formed on the inner surface (opposite surfaces) of the lower end of each housing side portion 31, projecting toward the fitting recess 23.

[0025] As shown in Figure 16, a pair of fitting grooves 34 are formed between each second locking projection 32 and the back surface of the fitting recess 23. Each fitting groove 34 is open in the vertical and widthwise directions (towards the center of the housing 18 in the widthwise direction) between each second locking projection 32 and the back surface of the fitting recess 23.

[0026] As shown in Figure 13, the second connecting projection 76 of the substrate-side outer shell 14, which will be described later, is inserted from below into the fitting groove 34 of the housing body 19. The second connecting projection 76 of the substrate-side outer shell 14, which will be described later, is in contact with the front surface of the second locking projection 32 in a pressed state.

[0027] The hood 21 is rectangular in shape. As shown in Figure 2, the mating connector 300 is inserted into and fitted into the hood 21. As shown in Figure 14, the hood 21 has a pair of projections 35 that protrude forward from the front surface of the housing body 19. Each projection 35 is inserted into a space 301 (see Figure 1) formed in the mating connector 300. A housing lock portion 36 is formed on the upper wall of the hood 21 to lock the mating connector 300. The housing lock portion 36 locks the mating connector 300, holding the housing 18 and the mating connector 300 in a fitted state.

[0028] (Outer conductor) As shown in Figure 2, the outer conductor is composed of an outer shell 13, a substrate-side outer shell 14, and a plurality of outer conductor tubes 15. The outer shell 13 and the substrate-side outer shell 14 are conductive rigid bodies made of die-cast zinc alloy, aluminum alloy, etc., derived from casting, and are formed from the same material. The outer shell 13 and the substrate-side outer shell 14 are assembled together to form a single housing. The outer conductor tubes 15 are press-formed bodies made by bending metal plates made of a material with higher hardness than the outer shell 13 and the substrate-side outer shell 14, such as brass.

[0029] As shown in Figures 17 and 18, the outer shell 13 has a rectangular upper part 37 in plan view and a pair of side parts 38 that protrude downward from both the left and right ends of the upper part 37. A fitting receiving part 39 is formed between the upper part 37 and each side part 38. The fitting receiving part 39 is open downward and to the rear in the outer shell 13.

[0030] Furthermore, as shown in Figure 18, the outer shell 13 has mounting portions 41 that are built up on the fitting receiving portion 39 side, connected to the upper portion 37 and each side portion 38, respectively. The mounting portions 41 close the front surface of the outer shell 13. As shown in Figure 17, a plurality of cylindrical portions 42 are formed protruding from the front surface of the outer shell 13. Each cylindrical portion 42 is arranged on both the upper and lower sides and in the width direction. Each cylindrical portion 42 is connected to each other in the upper, lower, left, and right directions, and has a shape that can fit into the fitting recess 23.

[0031] The outer shell 13 has a pair of first connecting protrusions 43 that project upward from each of the upper cylindrical portions 42. The upper end of each first connecting protrusion 43 protrudes above the upper portion 37.

[0032] A press-fit recess 45 is formed at the lower end of the front surface of the outer shell 13. The press-fit recess 45 is located between the lower cylindrical portions 42. Specifically, the press-fit recess 45 is partitioned by the lower cylindrical portions 42 and connecting portions that connect the lower cylindrical portions 42 in the width direction, and is open to the front and downward. The rear of the press-fit recess 45 is closed by the front surface of the outer shell 13. The press-fit recess 45 has a dovetail groove shape, with the width gradually increasing from the lower end on the opening side to the upper end on the rear side. The press-fit projection 75 of the substrate-side outer shell 14, which will be described later, is press-fitted into the press-fit recess 45 (see Figure 8).

[0033] As shown in Figure 18, the mounting portion 41 has a plurality of through holes 46 that penetrate in the front-to-back direction. Each through hole 46 has a circular cross-section, and as shown in Figure 17, its front end is formed inside each cylindrical portion 42. When the outer shell 13 and the housing 18 are connected, each cylindrical portion 42 fits into the fitting recess 23 of the housing 18, and as shown in Figure 2, the through holes 46 of the mounting portion 41 and the insertion holes 22 of the housing body 19 communicate in the front-to-back direction.

[0034] As shown in Figure 18, an engaging projection 47 is formed in the widthwise center of the outer shell 13, projecting toward the fitting receiving portion 39. The engaging projection 47 is plate-shaped along the vertical direction in the mounting portion 41 and is positioned between adjacent through holes 46 in the widthwise direction. The lower end of the engaging projection 47 has a stepped shape (see Figure 8). Each of the upper through holes 46 in the mounting portion 41 corresponds to the stepped shape of the lower end of the engaging projection 47 and is formed to extend further rearward than each of the lower through holes 46 (see Figure 2).

[0035] As shown in Figure 18, each through-hole 46 opens into an end face 109 that is positioned facing rearward within the fitting receiver 39. As shown in Figure 19, the end face 109 into which each of the upper through-holes 46 opens is located further rearward than the end face 109 into which each of the lower through-holes 46 opens.

[0036] As shown in Figure 19, the end face 109 of the mounting portion 41 has a pair of grooves 111 formed therein, which are cut forward from the lower left and right side edges of the rear opening edge of the through hole 46. A groove portion 51, which will be described later, is arranged between each groove 111. The outer shell 13 has a stopper portion 112 that closes the front end of each groove 111 in each through hole 46. The stopper portion 112 is on the front surface of each groove 111 and is arranged vertically, similar to the end face 109. The outer shell 13 also has a restricting portion 113 that closes the widthwise outer side of each groove 111 in each through hole 46. The restricting portion 113 is part of the inner surface of the side portion 38 and is arranged vertically, with its front end intersecting the stopper portion 112. The stopper portion 112 is capable of preventing the protruding portion 95 of the outer conductor tube 15 (described later) from being pressed against it (see Figure 7), and the restricting portion 113 is capable of restricting the rotation of the outer conductor tube 15 within the through hole 46 (see Figure 6).

[0037] As shown in Figure 18, the outer shell 13 has a plurality of grooves 51 formed therein. Each groove 51 is formed by cutting out the lower part (including the stepped portion) of the peripheral wall surrounding each through hole 46 in the mounting portion 41, and is further recessed into the inner surface of the rear end of the upper portion 37. Each groove 51 is positioned for each through hole 46 and is open downwards and to the rear on the side of the fitting receiving portion 39. Each groove 51 at the lower part of the peripheral wall opens to the end face 109.

[0038] As shown in Figures 12 and 13, four legs 54 are formed projecting downward from the front and rear ends of the lower end of each side 38. Each leg 54 is positioned corresponding to the four lower corners of the outer shell 13. As shown in Figures 2 and 9, each leg 54 is positioned and inserted into the fixing holes 201 of the circuit board 200.

[0039] As shown in Figure 18, a pair of recesses 56 are formed at the rear lower end of the inner surface of each side portion 38 (which is also the inner surface of the fitting receiving portion 39). Each recess 56 is open inward in the width direction (towards the side where each side portion 38 faces each other) and to the rear. As shown in Figure 9, each of the projections 72 of the substrate-side outer shell 14, which will be described later, is fitted into each recess 56.

[0040] As shown in Figures 12 and 13, the substrate-side outer shell 14 is assembled to the outer shell 13 from below. As shown in Figure 21, the substrate-side outer shell 14 has a rectangular bottom portion 59 in bottom view, a back portion 61 rising from the rear end of the bottom portion 59, a rising portion 62 rising from a position near the rear end of the bottom portion 59, and a partition portion 63 connecting the back portion 61 and the rising portion 62 at the center of the width direction of the bottom portion 59. The back portion 61, the rising portion 62, and the partition portion 63 are configured as fitting portions that can be fitted into the fitting receiving portion 39 of the outer shell 13.

[0041] The back portion 61 and the rising portion 62 form a rectangular vertical wall when viewed from the rear. As shown in Figure 9, the back portion 61 closes the rear surface of the outer shell 13. As shown in Figures 20 and 21, the protruding dimension of the rising portion 62 is smaller than the protruding dimension of the back portion 61. The height difference between the upper end surface of the rising portion 62 and the upper end surface of the back portion 61 corresponds to the height difference of the stepped shape of the mounting portion 41. The upper end surface of the rising portion 62 and the upper end surface of the partition portion 63 are at the same height and are connected.

[0042] As shown in Figure 21, a groove 52 is formed in the center of the width direction of the substrate-side outer shell 14. The groove 52 is continuously recessed in a stepped manner on the upper and front surfaces of the back portion 61, partition portion 63, rising portion 62, and bottom portion 59, respectively.

[0043] The groove 52 has multiple contact ribs 65 extending vertically on both sides facing each other in the width direction. Each contact rib 65 has an arc shape in cross-section. Numerous contact ribs 65 are formed at intervals in the front-to-back direction on both sides of the groove 52 corresponding to the back portion 61, partition portion 63, rising portion 62, and bottom portion 59, respectively.

[0044] On the upper surfaces of the back portion 61, the upright portion 62, and the bottom portion 59, a pair of engaging protrusions 49 are formed on both the left and right sides of the groove portion 52. Contact ribs 66 extending in the vertical direction are also formed on both sides of each engaging protrusion 49.

[0045] In the assembled state of the outer shell 13 and the substrate-side outer shell 14, the lower end of the engaging projection 47 of the outer shell 13 fits into the groove 52 of the substrate-side outer shell 14 (see Figure 8). Also, as partially shown in Figure 9, each engaging projection 49 of the substrate-side outer shell 14 fits into each groove 51 of the outer shell 13. Each contact rib 65, 66 of the substrate-side outer shell 14 contacts the outer surface of the engaging projection 47 and the inner surface of each groove 51 of the outer shell 13. Furthermore, as shown in Figures 20 and 21, long vertical contact ribs 67 are also formed on both sides of the back portion 61 and the rising portion 62. These contact ribs 67 contact the inner surface of each side portion 38 of the outer shell 13 (see Figure 9).

[0046] As shown in Figure 20, the substrate-side outer shell 14 has a pair of protrusions 72 at the lower rear ends of both sides. Each protrusion 72 has a cross-sectional arc shape that extends in the front-rear direction on both sides of the bottom 59. The front end of each protrusion 72 is integrally connected to the lower ends of the contact ribs 67 formed on both sides of the back 61. In the assembled state of the outer shell 13 and the substrate-side outer shell 14, as shown in Figure 9, the protrusions 72 fit into the lower portion of the recess 56, and the lower surface of the protrusions 72 contacts the lower surface of the recess 56 in a compressed or crushed state.

[0047] As shown in Figures 20 and 21, a press-fit projection 75 is formed protruding from the center in the width direction of the upper surface of the front end of the bottom portion 59. The press-fit projection 75 is columnar in shape and has a constant cross-sectional shape in the vertical direction except for the upper end. A pair of contact ribs 68 extending in the vertical direction are also formed on both sides of the press-fit projection 75. Each contact rib 68 contacts the inner surface of the press-fit recess 45.

[0048] The substrate-side outer shell 14 has a pair of second connecting protrusions 76 that project outward in the width direction from the front ends of both sides of the bottom portion 59. A pressing rib 78 with an arc-shaped cross-section extending in the vertical direction is formed on the rear surface of each second connecting protrusion 76. The pressing rib 78 of the second connecting protrusion 76 contacts the front surface of the second locking projection 32 in a pressed state (see Figure 13).

[0049] As shown in Figure 21, the substrate-side outer shell 14 has a plurality of openings 81. Each opening 81 has a rectangular cross-section and is located on both the left and right sides of the groove 52 on the substrate-side outer shell 14, and at both the front and rear positions. Each front opening 81 is located in front of the rising portion 62 and behind the engaging projection 49 formed on the bottom portion 59, and penetrates the bottom portion 59 to open to the bottom surface 92 (a downward-facing surface; see Figure 12). Each rear opening 81 is partitioned by the back portion 61, the rising portion 62, and the partition portion 63, and similarly penetrates the bottom portion 59 to open to the bottom surface 92. The partition portion 63 separates adjacent rear openings 81 in the width direction.

[0050] Dielectrics 16 and 17 are fitted into each opening 81, as shown in Figure 2. The inner conductors 11 and 12 mounted on the dielectrics 16 and 17 have a substrate connection portion 107, described later, that protrudes downward from the bottom surface 92 of the bottom portion 59 through the opening 81. The substrate connection portion 107 is inserted into a connection hole 202 formed in the circuit board 200 and is electrically connected to a conductive portion (not shown).

[0051] As shown in Figure 13, multiple mounting sections 84-87 are formed on the bottom surface 92 of the bottom 59, surrounding the periphery of each opening 81. Each mounting section 84-87 protrudes slightly downward from the bottom surface 92 of the bottom 59. The lower end surfaces of each mounting section 84-87 are flat and are electrically connected by soldering to the ground conductive part of the circuit board 200.

[0052] Specifically, each mounting section has a front mounting section 84 extending in the left-right direction in front of each front opening 81, a lateral mounting section 85 extending in the front-rear direction on both the left and right sides of each opening 81, and a shared mounting section 86 extending in the left-right direction between the front opening 81 and the rear opening 81. In addition, complementary mounting sections 87 are formed on both the left and right sides of the recessed section 91, which will be described later.

[0053] A retractable recess 88 is provided at the rear end of the bottom surface 92 of the bottom portion 59. The rear end of the retractable recess 88 opens to the back surface 93 of the substrate-side outer shell 14, which intersects with the bottom surface 92. The retractable recess 88 has a rectangular cross-section, communicates with the opening 81 at the front, is open to the rear and downward, while its upper end is closed by the back portion 61.

[0054] The retractable recess 88 is positioned above the surface wiring (not shown) of the circuit board 200. The board-side outer shell 14 avoids electrical connection with the surface wiring due to the retractable recess 88.

[0055] The complementary mounting section 87 corresponds to each retractable recess 88 and is formed to extend in the front-rear direction along the inner side edge of each retractable recess 88 that is located on the widthwise center side of the bottom 59.

[0056] As shown in Figure 13, a recessed portion 91 is provided in the center of the width direction of the back surface 93 of the substrate-side outer shell 14. As shown in Figure 9, the recessed portion 91 is formed on the back surface 93 of the substrate-side outer shell 14 so as to extend vertically from the bottom 59 to the back surface 61. The recessed portion 91 is recessed across the bottom surface 92 and the back surface 93 of the substrate-side outer shell 14 and is open to the rear and downward.

[0057] The recessed portion 91 penetrates the back portion 61 and is partitioned within the partition portion 63. In other words, the recessed portion 91 is formed within the thickness range of the partition portion 63. As shown in Figure 8, the inner back surface 126 and inner upper surface 127 of the recessed portion 91 are arranged parallel to the groove portion 52 inside the groove portion 52. The portion of the partition portion 63 between the recessed portion 91 and the groove portion 52 (see reference numeral a in Figure 8) is formed with a uniform or nearly uniform thickness from the back portion 61 to the bottom portion 59. The thickness of the partition portion 63 is reduced in the portion corresponding to the recessed portion 91. As shown in Figure 13, the complementary mounting portion 87 is positioned on the bottom surface 92 of the bottom portion 59 so as to be sandwiched in the width direction between the retractable recess 88 and the recessed portion 91. As shown in Figures 9 and 10, the lateral mounting portion 85, located on the inner side in the width direction (towards the center in the width direction), is positioned so as to be visible through the recessed portion 91 when viewed from the rear of the substrate-side outer shell 14.

[0058] The outer conductor tube 15 is integrally formed by bending a conductive metal plate and is thinner than both the outer shell 13 and the substrate-side outer shell 14. As shown in Figure 22, the outer conductor tube 15 has a cylindrical tubular connecting portion 94 extending in the front-rear direction, and a pair of protrusions 95 projecting downward from both the left and right sides of the rear end of the tubular connecting portion 94. The tubular connecting portion 94 is formed by bending a plate material into a circular shape, and as shown in Figure 23, it has a butt joint edge 116 at its lower end, where both ends in the circumferential direction are joined together.

[0059] Each projection 95 has a tapered shape that widens downward from both the left and right ends of the upper half of the rear end of the cylindrical connecting portion 94. In addition, the projection 95 has a rectangular shape when viewed from the side. An embossed contact projection 117 that bulges outward is formed near the lower end of each projection 95. The contact projection 117 has an arc shape in cross-section.

[0060] Furthermore, press-fitting blades 118 are formed in the front and rear intermediate portions of the cylindrical connecting portion 94. The press-fitting blades 118 are paired at both the left and right ends (both radial ends) of the cylindrical connecting portion 94 and are formed in a shape that bulges outward on the front side of the slit 119 which runs in the vertical direction (which is also the circumferential direction of the cylindrical connecting portion 94). Specifically, as shown in Figure 22, the press-fitting blades 118 have an arc-shaped cross-section and a triangular shape in side view that decreases in vertical dimension toward the front. As shown in Figure 3, each press-fitting blade 118 is pressed into and locked into the inner circumferential surface of the through hole 46 of the outer shell 13.

[0061] Furthermore, inner protrusions 120 are formed in the front-to-rear intermediate portion of the cylindrical connecting portion 94. As shown in Figure 23, each inner protrusion 120 is formed in pairs at both the left and right ends of the cylindrical connecting portion 94 and is formed in a shape that bulges inward on the rear side of the slit 119 along the vertical direction (which is also the circumferential direction of the cylindrical connecting portion 94). Each inner protrusion 120 is engaged with the outer surface of the dielectric 16, 17 arranged inside the cylindrical connecting portion 94 (see Figure 3).

[0062] As shown in Figure 22, the cylindrical connecting portion 94 has a plurality of retaining protrusions 121 formed in a portion behind the press-fitting blade 118 and in front of the protruding portion 95. Each retaining protrusion 121 is embossed and bulges outward from the cylindrical connecting portion 94, and is formed to extend in a constant cross-sectional shape (arc-shaped) in the front-rear direction.

[0063] Furthermore, as shown in Figure 23, four retaining protrusions 121 are provided on the outer circumferential surface of the cylindrical connector 94 at regular intervals in the circumferential direction. The protrusion dimension from the outer circumferential surface of the cylindrical connector 94 is greater for the press-fitting blade 118 than for the retaining protrusions 121. When the cylindrical connector 94 is viewed from the axial direction (front or rear, in the thickness direction of the paper in Figure 23), each retaining protrusion 121 is positioned offset from each press-fitting blade 118 in the circumferential direction. Specifically, when the cylindrical connector 94 is viewed from the front, the retaining protrusions 121 are located in four places: upper right, lower right, upper left, and lower left, corresponding to the upper, lower, lower, left, and right parts. The lower right retaining protrusion 121 in Figure 23 is positioned near the abutting edge 116 of the cylindrical connector 94. As shown in Figure 4, each retaining protrusion 121 contacts the inner circumferential surface of the through hole 46 of the outer shell 13.

[0064] The outer conductor tube 15 is inserted from the rear into the through-hole 46 of the outer shell 13. Multiple outer conductor tubes 15 are provided, corresponding to each through-hole 46; in this embodiment 1, four are provided, and as shown in Figure 1, each is formed to be the same shape. The outer conductor tube 15 is held in place by the outer shell 13 in a non-detachable state by each protrusion 95 being stopped against the stopper portion 112 and each press-fitting blade 118 being locked to the inner circumferential surface of the through-hole 46 (see Figure 7). The front end of the cylindrical connecting portion 94 of the outer conductor tube 15 is positioned to protrude into the hood 21 from the cylindrical portion 42 of the outer shell 13 in the shield connector 10 (see Figure 2).

[0065] (dielectric) As shown in Figure 1, the dielectrics 16 and 17 have a cylindrical main body portion 101 extending in the front-rear direction and an extension portion 102 projecting downward from the rear end of the main body portion 101, and are formed in an L-shape in side view. The horizontal portions 104 of the inner conductors 11 and 12, which will be described later, are inserted into the main body portion 101. A guide groove 103 extending in the vertical direction is formed on the rear surface of the extension portion 102. The guide groove 103 is open to the rear. The extension portions 105 of the inner conductors 11 and 12, which will be described later, are fitted into the guide groove 103 from the rear (see Figures 2 and 7).

[0066] The main body portions 101 of the dielectrics 16 and 17 are inserted into the cylindrical connection portion 94 of the outer conductor tube 15 and positioned in the through-hole 46 of the outer shell 13. The lead-out portions 102 of the dielectrics 16 and 17 are inserted into the opening 81 of the substrate-side outer shell 14.

[0067] As shown in Figure 1, the dielectric is composed of two types of dielectrics 16 and 17, one long and one short. The long dielectric 16 is held by the outer conductors 13, 14, and 15 with its main body 101 positioned in the upper through hole 46 and its lead-out portion 102 inserted into the rear opening 81. The short dielectric 17 is held by the outer conductors 13, 14, and 15 with its main body 101 positioned in the lower through hole 46 and its lead-out portion 102 inserted into the front opening 81.

[0068] (Internal conductor) As shown in Figure 1, the inner conductors 11 and 12 are pin-shaped terminals and have a horizontal portion 104 extending in the front-rear direction and an extension portion 105 extending downward from the rear end of the horizontal portion 104, and are formed in an L-shape in side view. The horizontal portion 104 has a mating connector portion 106 that protrudes forward from the main body portion 101 when inserted into the main body portion 101 of the dielectric 16 and 17. As shown in Figure 2, the mating connector portion 106 protrudes into the hood 21 and is electrically connected to the mating inner conductor 303 when the housing 18 and the mating connector 300 are mated. The extension portion 105 has a substrate connector portion 107 that protrudes downward from the lead portion 102 when inserted into the guide groove 103 of the lead portion 102 of the dielectric 16 and 17. The substrate connector portion 107 is formed to be smaller in diameter than the upper portion of the extension portion 105.

[0069] As shown in Figure 1, the inner conductor consists of two types of inner conductors 11 and 12, one long and one short. The long inner conductor 11 is held by the long dielectric 16. The short inner conductor 12 is held by the short dielectric 17.

[0070] (Method of assembly and operation of shielded connectors) First, the horizontal portions 104 of each inner conductor 11, 12 are inserted from the rear into the main body portions 101 of the corresponding dielectrics 16, 17 and held in place. The extended portions 105 of the inner conductors 11, 12 are inserted into the guide grooves 103 and positioned exposed on the rear side of the lead-out portions 102. Next, the main body portions 101 of each dielectric 16, 17 are inserted from the rear into the cylindrical connecting portions 94 of the corresponding outer conductor tubes 15 and held in place. Then, the cylindrical connecting portions 94 of each outer conductor tube 15 are inserted from the rear into the through holes 46 of the corresponding outer shell 13 and held in place.

[0071] Towards the end of the insertion process of the cylindrical connector 94, each protrusion 95 enters each groove 111 from the rear, and the contact projection 117 of each protrusion 95 slides along the restricting portion 113. At this time, each protrusion 95 is elastically deformed inward in the width direction (towards the center in the width direction of the outer conductor tube 15), with the connection point with the cylindrical connector 94 as the pivot point.

[0072] When the cylindrical connecting portion 94 is properly inserted into the through hole 46 of the outer shell 13, the front end (plate thickness portion) of each protrusion 95 abuts against the stopper portion 112 of the outer shell 13 (see Figure 7), restricting further insertion of the outer conductor tube 15. Each protrusion 95, while in an elastically deformed state, firmly contacts each contact projection 117 with the restricting portion 113 (see Figure 6). The outer conductor tube 15 is assembled to the outer shell 13 with play restricted by the locking action of the protrusions 95 against the outer shell 13 and the holding action of the press-fitting blade 118 and each retaining projection 121, which will be described later.

[0073] In this embodiment 1, since the outer conductor tube 15 is assembled to the outer shell 13 from the rear, the stopper portion 112 can easily form a structure that prevents the outer conductor tube 15 from coming out from the front. In particular, the direction in which the outer conductor tube 15 is inserted into the outer shell 13, the direction in which the inner conductors 11 and 12 are inserted into the dielectrics 16 and 17, the direction in which the dielectrics 16 and 17 are inserted into the outer conductor tube 15, and, as will be described later, the direction in which the outer shell 13 is connected to the housing 18 are all rearward and unified in the same direction, resulting in excellent assembly performance.

[0074] Furthermore, when the cylindrical connecting portion 94 is properly inserted into the through hole 46 of the outer shell 13, each press-fitting blade 118 of the outer conductor tube 15 is locked in a press-fitting state (compressed or crushed) by biting into the left and right ends of the inner circumferential surface of the through hole 46 of the outer shell 13 (see Figure 3). In addition, each retaining projection 121 of the outer conductor tube 15 firmly contacts the upper, lower, left, and right portions of the inner circumferential surface of the through hole 46 of the outer shell 13, behind the locking position of each press-fitting blade 118 (see Figure 4).

[0075] As shown in Figure 11, the front end of the cylindrical connecting portion 94 is positioned to protrude forward from the cylindrical portion 42 of the outer shell 13. If each retaining projection 121 were not formed on the cylindrical connecting portion 94, there would be a concern that when an external force acts on the front end of the cylindrical connecting portion 94 from above or below, the cylindrical connecting portion 94 would be pressed in the direction of the external force, causing the axis of the cylindrical connecting portion 94 to shift. In this first embodiment, however, a plurality of retaining projections 121 are formed on the cylindrical connecting portion 94 separately from the press-fitting blade 118, and each retaining projection 121 is positioned at circumferential intervals around the top, bottom, left, and right portions of the cylindrical connecting portion 94. Since each retaining projection 121 is in contact with and held by the inner circumferential surface of the through hole 46 of the outer shell 13, it can resist external forces from above or below, and the axis of the cylindrical connecting portion 94 can be prevented from shifting.

[0076] Next, the outer shell 13 is connected to the housing 18 from the rear (see Figure 11). During the connection process of the outer shell 13, the first connecting projection 43 overcomes the first locking projection 28 and engages with the fitting hole 27. When the connection of the outer shell 13 is complete, the cylindrical portion 42 contacts the back surface of the fitting recess 23, stopping the connection operation of the outer shell 13, and the rear surface of the first connecting projection 43 and the front surface of the first locking projection 28 come into contact with each other (see Figure 2).

[0077] The front end of the cylindrical connector 94 is inserted into the insertion hole 22 of the housing 18 from the rear. Within the insertion hole 22, each housing-side retaining projection 108 contacts the outer circumferential surface of the front of the cylindrical connector 94 in a compressed or crushed state (see Figure 5). Each housing-side retaining projection 108 contacts the outer circumferential surface of the cylindrical connector 94 from the top, bottom, left, and right sides. As a result, the cylindrical connector 94 is held by the outer shell 13 by each press-fitting blade 118 and each retaining projection 121, and is also held by the housing 18 by each housing-side retaining projection 108 located on the opposite side (front side) from each retaining projection 121, with the press-fitting blade 118 in between. Therefore, in this embodiment 1, it is possible to more reliably prevent the axis of the cylindrical connector 94 from shifting. As a result, it is possible to achieve a state in which the axis of the cylindrical connector 94 aligns with the axis of the mating outer conductor 311 (see Figure 2).

[0078] Next, the substrate-side outer shell 14 is assembled to the outer shell 13 from below (see Figure 12). Towards the end of the assembly process of the substrate-side outer shell 14, the projection 72 interferes with the side portion 38, causing the side portion 38 to elastically deform slightly outward in the width direction, with the upper portion 37 as the pivot point. When the assembly of the substrate-side outer shell 14 is complete, the engaging projection 47 of the outer shell 13 comes into contact with the bottom surface 92 of the groove portion 52 of the substrate-side outer shell 14, stopping the assembly operation of the substrate-side outer shell 14, and a restoring force acts on the side portion 38, causing the projection 72 to fit into the recess 56 (see Figure 9). Here, since there is an overlap between the projection 72 and the recess 56, the projection 72 can contact the inner surface of the recess 56 and maintain that contact state. The fitted state of the recess 56 and the projection 72 is visible in a rear view.

[0079] Furthermore, when the substrate-side outer shell 14 is assembled, the press-fit protrusion 75 is fitted into the press-fit recess 45 from below, and each contact rib 68 of the press-fit protrusion 75 contacts the inner surface of the opening side of the press-fit recess 45 in a compressed or crushed state. As a result, the substrate-side outer shell 14 is held stably in a state where tilting in the front-rear direction relative to the outer shell 13 is restricted.

[0080] Furthermore, when the substrate-side outer shell 14 is assembled, the second connecting projection 76 is fitted into the fitting groove 34 of the housing 18 (see Figure 13), the pressing rib 78 of the second connecting projection 76 contacts the front surface of the second locking projection 32, and the second connecting projection 76 is held in place by the housing 18 in a manner that prevents it from coming loose.

[0081] Furthermore, upon completion of the assembly of the substrate-side outer shell 14, the back portion 61, the rising portion 62, and the partition portion 63 are fitted into the fitting receiving portion 39 of the outer shell 13, and each engaging projection 49 of the substrate-side outer shell 14 is fitted into each groove portion 51 of the outer shell 13 (see Figure 9), while the engaging projection 47 of the outer shell 13 is fitted into the groove portion 52 of the substrate-side outer shell 14. Each contact rib 65-68 of the substrate-side outer shell 14 contacts the corresponding surface, such as the inner surface of each groove portion 51 of the outer shell 13 and the outer surface of the engaging projection 47, in a compressed or crushed state. As a result, numerous electrical connection structures (contact structures) are formed between the outer shell 13 and the substrate-side outer shell 14 via each contact rib 65-68. Therefore, the electrical connection reliability between the outer shell 13 and the substrate-side outer shell 14 can be improved.

[0082] Each contact rib 65-68 is in contact with the corresponding surface of the outer shell 13 along the vertical direction. Therefore, even if a vertical vibration force is applied to the outer shell 13 and the substrate-side outer shell 14, the contact state of each contact rib 65-68 can be maintained. In particular, in this embodiment 1, many contact ribs 65-68 are formed on the inner surface of each groove 52 and the outer surface of each engaging projection 49 of the substrate-side outer shell 14, each engaging projection 49 of the substrate-side outer shell 14 is fitted into each groove 51 of the outer shell 13, and the engaging projection 47 of the outer shell 13 is fitted into the groove 52 of the substrate-side outer shell 14, so that each contact rib 65-68 can reliably contact the corresponding surface of the outer shell 13.

[0083] In the assembled state of the outer shell 13 and the substrate-side outer shell 14, as shown in Figure 2, the rising portion 62 is positioned to cover the outer conductor tube 15, the short dielectric 16, and the short inner conductor 12 located in the lower through-hole 46 from the rear. The back portion 61 is also positioned to cover the outer conductor tube 15, the long dielectric 17, and the long inner conductor 11 located in the upper through-hole 46 from the rear. The lead-out portions 102 of the inner conductors 11 and 12 are completely surrounded by the outer conductors 13, 14, and 15, except for the substrate connection portion 107. This completes the assembly of the shield connector 10.

[0084] Next, the shield connector 10 is installed on the surface of the circuit board 200 (see Figures 2, 8 to 10). The board connection portions 107 of each inner conductor 11 and 12 are inserted into the connection holes 202 of the circuit board 200, the legs 54 of the outer shell 13 are inserted into the fixing holes 201 of the circuit board 200, and the mounting portions 84 to 87 are placed on the conductive lands of the circuit board 200. In this state, reflow soldering is performed so that the board connection portions 107 of each inner conductor 11 and 12 are soldered to the conductive parts for signals in the connection holes 202 of the circuit board 200. In addition, the legs 54 are soldered to the fixing holes 201, and the mounting portions 84 to 87 are soldered to the conductive parts for ground.

[0085] Each inner conductor 11, 12 is surrounded by multiple mounting sections 84-87 on the bottom surface 92 of the substrate-side outer shell 14. This suppresses crosstalk between adjacent inner conductors 11, 12 in the width direction and front-to-back direction. Furthermore, the substrate-side outer shell 14 has recessed areas 88 that are set back away from the surface wiring of the circuit board 200, thus preventing the substrate-side outer shell 14 from electromagnetically coupling to the surface wiring.

[0086] Incidentally, when reflow soldering is performed, reflow heat is transferred from the outer surface of the substrate-side outer shell 14 to the mounting sections 84-87, and the solder (paste solder) corresponding to the mounting sections 84-87 is melted. In this embodiment 1, the substrate-side outer shell 14 has a recessed portion 91 extending from the back surface 93 of the back portion 61 to the bottom surface 92, and the thickness of the partition portion 63 is reduced, so the thermal conductivity resistance can be reduced and the heat transfer to the mounting sections 84-87 is excellent. In particular, since the recessed portion 91 extends to the vicinity of the lateral mounting section 85 on the bottom surface 92 of the substrate-side outer shell 14, it is possible to effectively prevent the lateral mounting section 85 from becoming unsoldered.

[0087] Furthermore, in this embodiment 1, as shown in Figure 10, the solder joint state of the lateral mounting portion 85 to the conductive portion of the circuit board 200 (see the solder fillet indicated by reference numeral b in Figure 10) can be confirmed through the opening on the back surface 93 of the recessed portion 91.

[0088] [Other embodiments of this disclosure] Embodiment 1 disclosed herein should be considered in all respects to be illustrative and not restrictive. In the first embodiment described above, the outer shell was constructed separately from the substrate-side outer shell. However, according to other embodiments, the outer shell may be formed integrally with the substrate-side outer shell. In the first embodiment described above, the protruding portion of the outer conductor tube had a contact projection. However, according to other embodiments, the protruding portion does not need to have a contact projection. In this case, the side surface (plate surface) of the protruding portion can be brought into contact with the restricting portion of the outer shell. In the first embodiment described above, a housing-side retaining projection was formed on the housing. However, according to other embodiments, a housing-side retaining projection does not need to be formed on the housing. In this case, it is preferable to form a retaining projection corresponding to the housing-side retaining projection on the outer circumferential surface of the outer conductor tube. [Explanation of symbols]

[0089] 10…Shielded connector 11…Long inner conductor (inner conductor) 12…Short length inner conductor (inner conductor) 13…Outer shell (outer conductor) 14…Substrate-side outer shell (outer conductor) 15…Outer conductor tube (outer conductor) 16…Long-length dielectric (dielectric) 17…Short-length dielectric (dielectric) 18… Housing 19… Housing body 21…Food 22…Insertion hole 23…Matching recess 24…Recessed inner rib 26...Mold cutting recess 27…Matching hole 28...First locking protrusion 31…Side of the housing 32...Second locking protrusion 34…Matching groove 35...Protruding piece 36…Housing lock section 37…Top 38... Side 39...Matching receiver 41... Mounting part 42...Cylinder part 43...First connecting protrusion 45…Press-fit recess 46…Through-hole 47...Engaging projection of the outer shell (engaging projection) 49...Engaging projection on the outer shell of the substrate side (engaging projection) 51... Grooves of the outer shell (grooves) 52... Groove portion of the outer shell on the substrate side (groove portion) 54...legs 56…recess 59...Bottom 61...Back (fitting part) 62… Upper part (fitting part) 63... Partition (fitting part) 65, 66, 67, 68… Contact ribs 72… protrusion 75... Press-fit protrusion 76…Second connecting protrusion 78... Pressed Rib 81…Opening 84…Front mounting section (mounting section) 85... Side mounting section (mounting section) 86…Shared implementation section (implementation section) 87... Complementary Implementation Section (Implementation Section) 88... Evacuation recess 91...Depressed area 92...Bottom 93...Back 94...Cylindrical connecting part 95...Protruding part 101...Main body 102...Drawer part 103... Guide groove 104…Horizontal part 105...Extending part 106...Connecting part on the other side 107... Circuit board connection section 108…Housing-side retaining projection 109...end face 111... Groove 112... Stopper section 113... Regulatory Department 116...butt joint 117...Contact protrusion 118... Press-fitting blade 119... Slit 120…Inner protrusion 121...Holding protrusion 126...Inner back surface 127…Inner top surface 200... Circuit board 201…Fixing hole 202…Connection port 300...Mother connector 301…Space part 303...Mating inner conductor 311...Mating outer conductor

Claims

1. It comprises an inner conductor, an outer conductor surrounding the inner conductor, and a dielectric disposed between the inner conductor and the outer conductor, The outer conductor has a bottom portion having a bottom surface, an opening that penetrates the bottom portion and opens into the bottom surface, and a plurality of mounting portions that protrude from the bottom surface and are soldered to the surface of the circuit board. The dielectric is fitted into the opening, The inner conductor has a board connection portion that protrudes from the bottom surface through the opening and is connected to the circuit board, The aforementioned plurality of mounting sections are arranged not only on the left and right sides of the opening, but also on the front and rear sides of the opening, and are formed to surround the opening on all four sides. The shielded connector has an outer conductor having a back surface that intersects the bottom surface and a recessed portion that extends from the back surface to the bottom surface and is located near the lateral mounting portion on the bottom surface.

2. The shield connector according to claim 1, wherein the lateral mounting portion is arranged to be visible through the recessed portion when viewed from the rear of the outer conductor.

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