PCB Connectors

Abstract

To provide a board connector capable of preventing peeling of a U-shaped bent portion of a fixing fitting from solder even when an external force is applied to a housing, and capable of maintaining the fixed state of the housing and a board over time.SOLUTION: A board connector 10 includes a housing 11 mounted on a substrate 30 and fitted with a mating housing 41, and a fixing metal fitting 20 that fixes the housing 11 to the board 30 by soldering a bending portion 23 whose upper side is attached to the side wall 13 of the housing 11 and whose lower side is bent into a U-shape to the board 30, and the U-shaped bending portion 23 has a through hole 25 into which liquid solder flows and is retained and solidified.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a board connector having a peg for fastening to a board. [Background technology]

[0002] One such type of board connector is described in Patent Document 1. The board connector described in Patent Document 1 includes a housing mounted on the board, and a peg (metal fixture) attached to the side wall of the housing and soldering a bent portion bent into a U shape at the bottom to the board to secure the housing to the board. The peg has a pair of extending pieces bent upward on both sides of the U-shaped bent portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-36477 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional board connector, the U-shaped bent portion of the peg is soldered to the board mainly on its outer surface, so that when an external force is applied to the housing, the U-shaped bent portion may come off the solder. For this reason, it is necessary to maintain the fixed state between the housing and the board over time.

[0005] The present invention was made in consideration of the problems inherent in the prior art, and its object is to provide a board connector that can prevent the U-shaped bent portion of the fixing metal fitting from peeling off from the solder even when an external force is applied to the housing, and that can maintain the fixed state between the housing and the board over time. [Means for solving the problem]

[0006] A connector for a circuit board according to one aspect of the present invention comprises a housing that is mounted on a circuit board and into which a mating housing is fitted, and a fixing bracket whose upper side is attached to the side wall of the housing and whose lower side is bent into a U-shape and soldered to the circuit board, thereby fixing the housing to the circuit board, and the U-shaped bent portion has a through hole through which liquid solder flows and accumulates and solidifies inside. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a board connector that can prevent the U-shaped bent portion of the fixing bracket from peeling off from the solder even when an external force is applied to the housing, and can maintain the fixed state between the housing and the board over time. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an example of a board connector according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of a housing of the board connector. [Figure 3] FIG. 2 is a perspective view of a fixing metal fitting of the board connector. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 2 is a perspective view of the fixing metal fitting before being bent and formed. [Figure 6] FIG. 4 is a partial cross-sectional view showing the fixed state of the fixing metal fitting. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a board connector according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0010] Fig. 1 is a perspective view showing an example of a board connector according to an embodiment of the present invention. Fig. 2 is a perspective view of a housing of the board connector. Fig. 3 is a perspective view of a fixing metal fitting of the board connector. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3. Fig. 5 is a perspective view of the fixing metal fitting before bending. Fig. 6 is a partial cross-sectional view showing the fixing metal fitting in a fixed state. Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 6.

[0011] 1, 2, and 6, board connector 10 includes housing 11, electromagnetic shielding member 16, inner terminals 17, an inner housing (not shown), and pegs (fixing metal fittings) 20 for fixing housing 11 to board 30. When housing 11 of board connector 10 is mated with housing 41 of mating connector 40, it becomes high-speed transmission connector A, which is mounted on a vehicle such as an automobile.

[0012] As shown in Figures 1 and 2, the housing 11 of the board connector 10, which is mounted on the board 30 via pegs 20, is made of synthetic resin and has a rectangular parallelepiped shape, with the front side forming a square tubular hood portion 12 into which the housing 41 of the mating connector 40 is fitted. The inner surface of the ceiling of this hood portion 12 is formed with a latched portion (both not shown) that latches onto the latching portion of the lock arm 42 of the mating connector 40. Furthermore, both side walls 13, 13 of the housing 11 have retaining wall portions 14 that protrude integrally from both ends and have slits 15 between them and the side walls 13. Furthermore, an electromagnetic shielding member 16 is attached to the housing 11.

[0013] The electromagnetic shielding member 16 is formed in an elliptical cylindrical shape, and contains an inner housing and a pair of inner terminals 17, 17 held by the inner housing. This elliptical cylindrical electromagnetic shielding member 16 is contained within the rectangular cylindrical hood portion 12 of the housing 11. When the board connector 10 is mounted on the board 30, the electromagnetic shielding member 16 is connected to the ground circuit of the board 30 by soldering, and the inner terminals 17 are connected to the communication circuit of the board 30 by soldering.

[0014] 3, the peg 20 has a peg body 21, protruding pieces 22 that protrude from both upper ends of the peg body 21 and are press-fitted into the slits 15 of the pair of retaining walls 14, 14 of the housing 11, and a bent portion 23 that is bent into a U-shape on the lower side of the peg body 21. This U-shaped bent portion 23 is bent to the opposite side of the side wall 13 of the housing 11.

[0015] 3 to 5, the peg body 21 is made of metal and formed into a substantially rectangular plate shape. A pair of protruding pieces 22, 22 on both ends of the upper side of the peg body 21 are press-fitted into the slits 15 between the side wall 13 of the housing 11 and the pair of holding walls 14, 14, thereby assembling the peg body 21 to the side wall 13.

[0016] As shown in FIGS. 3 to 7, the bent portion 23 formed by bending the lower side of the peg body 21 into a U-shape has U-shaped recesses 24 on both sides of the inner surface 23a. A pair of through holes 25 is formed at opposing positions in each of the pair of U-shaped recesses 24, 24, into which liquid solder flows (penetrates) and accumulates and solidifies inside. The bent portion 23 formed by bending the lower side of the peg body 21 into a U-shape is soldered to the board 30, whereby the housing 11 of the board connector 10 is fixed to the board 30 via the fixing pad 50. An elliptical reinforcing portion 26 is provided at the center of the peg body 21 on the opposite side to the side wall 13 of the housing 11.

[0017] As shown in FIGS. 6 and 7 , when the housing 11 of the board connector 10 is mounted on the board 30, the U-shaped bent portion 23 of the peg 20 is soldered to the fixing pad 50 on the board 30, and the housing 11 is fixed to the board 30 by this soldering. More specifically, when the housing 11 of the board connector 10 is mounted on the board 30, a reflow process is performed, during which the solder paste applied to the fixing pad 50 melts due to heat and becomes liquid solder H'. This liquid solder H' spreads over the outer surface 23b and side surface 23c of the U-shaped bent portion 23 of the peg 20, and during the process of forming a fillet, the liquid solder H' penetrates from the outer surface 23b of the U-shaped bent portion 23 through the through hole 25 into the recess 24 of the inner surface 23a. Furthermore, the liquid solder H' penetrates from the side surface 23c of the U-shaped bent portion 23 into the recess 24 of the inner surface 23a. The liquid solder H' then accumulates and solidifies. As a result, not only the outer surface 23b but also the recesses 24 on the side surfaces 23c and inner surfaces 23a of the U-shaped bent portion 23 of the peg 20 are soldered, and the U-shaped bent portion 23 of the peg 20 is soldered to the fixing pad 50 on the board 30. This soldering fixes the housing 11 of the board connector 10 to the board 30.

[0018] 1, the board 30 on which the board connector 10 is mounted is a printed circuit board with a multi-layer structure for differentially transmitting high-speed signals. The board 30 is formed by, for example, stacking upper and lower resin resists 31 and 32, sandwiching a resin insulating board 34 between two copper ground circuit boards 33.

[0019] Furthermore, the substrate 30 has four ground circuit holes (not shown) formed as through holes for grounding on one end side. Legs of the electromagnetic shield member 16 of the board connector 10 are inserted into these four ground circuit holes and connected by soldering. Wiring patterns for the electromagnetic shield circuit are formed in these four ground circuit holes. Furthermore, the substrate 30 has two communication circuit holes (not shown) formed as through holes for communication on one end side. Wiring patterns for the communication circuits are formed in these two communication circuit holes. Base ends of the inner terminals 17 of the board connector 10 are inserted into the communication circuit holes and connected by soldering.

[0020] As shown in FIG. 1 , the mating connector 40 includes a housing 41 having a locking arm 42, a shielded electric wire 43, a shield terminal 44 as an electromagnetic shielding member, an inner housing (not shown), and an inner terminal 17 connected to the core of the twisted inner wire of the shielded electric wire 43. The housing 41 is formed into a box shape from synthetic resin and has a terminal accommodating portion 41a that accommodates the shielded terminal 44 connected to the end of the shielded electric wire 43. A locking arm 42 is provided on an upper surface 41b of the housing 41 to maintain the mated state when mated with the board connector 10. The locking arm 42 is provided with a protruding locking portion. The twisted inner wire of the shielded electric wire 43 is covered with a metal braid, and the braid is crimped and connected by a pair of braid crimping pieces of the shield terminal 44. The cylindrical housing accommodating portion of the shield terminal 44 accommodates an inner housing and a pair of inner terminals 17, 17 that are held by the inner housing and crimped to the core wires exposed at the ends of the two twisted internal wires.

[0021] According to the board connector 10 of the above embodiment, when the board connector 10 is mounted on a vehicle with the mating connector 40 mated, vibrations are applied to the board connector 10 while the vehicle is running, etc. When vibrations are applied to the board connector 10, the shielded wire 43 of the mating connector 40 swings, and external forces are applied to the board connector 10 in the up / down, left / right, and axial directions relative to the board 30, as shown in FIG.

[0022] In the board connector 10 of this embodiment, when the housing 11 is mounted on the board 30, as shown in FIGS. 6 and 7 , liquid solder H′ penetrates from the outer surface 23b of the U-shaped bent portion 23 through the through-hole 25 into the recess 24 on the inner surface 23a. After the liquid solder H′ penetrates from the side surface 23c of the U-shaped bent portion 23 into the recess 24 on the inner surface 23a, the liquid solder H′ accumulates and solidifies. This solidification solders not only the outer surface 23b of the U-shaped bent portion 23 of the peg 20 but also the side surface 23c and the recess 24 on the inner surface 23a, thereby fixing the housing 11 of the board connector 10 to the board 30. Therefore, even if an external force is applied to the board connector 10, the U-shaped bent portion 23 of the peg 20 is prevented from peeling off from the solder fillet H, preventing the fixed state between the housing 11 of the board connector 10 and the board 30 from being lost.

[0023] In this way, even if an external force is applied to the housing 11 of the board connector 10, the U-shaped bent portion 23 of the peg can be prevented from peeling off from the solder fillet H, and the fixed state between the housing 11 and the board 30 can be reliably maintained over time.

[0024] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

[0025] That is, according to the above embodiment, a pair of through holes are provided at opposing positions of each U-shaped recess on both sides of the U-shaped bent portion of the peg body, through which liquid solder enters and accumulates and solidifies inside, but it is also possible to provide one through hole in each recess on both sides of the U-shaped bent portion.

[0026] Furthermore, according to the above embodiment, through holes are provided in each U-shaped recess on both sides of the U-shaped bent portion of the peg body, through which liquid solder enters and accumulates and solidifies inside, but through holes may also be provided at locations other than the recesses on both sides of the U-shaped bent portion. [Explanation of symbols]

[0027] 10 PCB connector 11. Housing 13 Side wall 14 Retaining wall 15 Slit 20 Pegs (fixing brackets) 22 Projecting piece 23 U-shaped bend 23a Inner surface 24 U-shaped recess 25 through holes 30 boards 41 Mating housing H' Liquid solder

Claims

1. a housing mounted on a substrate and fitted with a mating housing; a metal fixture whose upper side is attached to a side wall of the housing and whose lower side is bent into a U-shape and soldered to the board, thereby fixing the housing to the board; Equipped with the U-shaped bent portion has a through hole into which liquid solder flows and is stored and solidified therein; The U-shaped bent portion has U-shaped recesses on both sides of an inner surface, The through hole is formed in the U-shaped recess.

2. the housing has a holding wall portion at each end of the side wall, the holding wall portion having a slit between the side wall and the holding wall portion; 2. The board connector according to claim 1, wherein said fixing metal fitting has protruding pieces at both ends of an upper portion thereof, said protruding pieces being press-fitted into said slits.

3. 2. The board connector according to claim 1, wherein a plurality of the through holes are formed in opposing positions in the U-shaped recess.

Images