JPH05290928A - Surface mount connector - Google Patents

Abstract

PURPOSE: To carry out mounting at high density by installing a ground plate which is a conductive metal to be installed in both ends of a housing and is electrically connected with a shield case for mounting connectors on a board. CONSTITUTION: A connection terminal 2 is inserted into and fixed in a terminal installation hole of a housing. A ground plate 5, which is a conductive metal, is so composed as to have a structure easy to be fitted in both end parts of the housing 3 and possible to be installed by insertion and after the plate 5 is installed in both ends, a shield case 4 is put on the housing 3. Consequently, the plate 5 is fixed and at the same time the face of the plate 5 in the case 4 side is brought into contact with the case 4 to carry out electric conduction. Since the thermal capacity of the plate 5 is relatively small, the mounting face side of the plate 5 can be soldered in a pattern on a the same board as general electronic parts. Moreover, a boss 6 precisely carries out positioning and temporary fixing of a connector at the time of soldering and furthermore reliably works to fix the plate in the connector after soldering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector mounted on a printed wiring board or the like, and more particularly to a surface mount shielded connector containing a plurality of cables used for communication between electronic devices such as personal computers and printers. It is a thing.

[0002]

2. Description of the Related Art FIG. 9 is an exploded perspective view of a conventional connector in which constituent parts of a through-hole type shield connector 30 are individually drawn. In FIG. 9, 31 is a shield metal case, 32 is a metal die-cast lock stand having tapped screw holes 36 at both ends, 33 is a housing made of an insulating material such as plastic, and 34 is The connection terminal attached to the terminal hole 35 provided in the housing 33 is shown.

FIG. 10 is an external view of the connector 30 after the above-mentioned components 31 to 34 have been assembled.
FIG. 11 schematically illustrates a mounting method for mounting the connector 30 on the printed wiring board 37. In FIG. 11, the connector 30 is arranged at a predetermined position on the board 37, and at that time, the connection terminal 34 of the connector 30 is inserted into the through hole 41 for wiring connection provided on the board,
The opening 3 formed in the ground pattern 38 of the board by the screw hole 36 of the connector 30 and the screw 40 shown in the drawing.
It is screwed to the substrate 37 via 9. Then, the connection terminal 34 is soldered to the through hole 41.
The shield metal case 31 of the connector 30 is grounded to the ground pattern 38 via the lock stand 32 of the connector 30.

[0004]

However, as described above, the conventional connector 30 requires the relatively large screw-fastening opening 39 when mounting it on the board, which means that both sides of the board are mounted. However, there is a problem in high-density mounting of electronic parts and the like. Therefore, it was considered to stop the conventional screwing and directly solder the connector to the board. However, the above-mentioned lock stand 32 has a large mounting area with respect to the board and has a large heat capacity and a high thermal conductivity, so that the soldering is performed. It was not suitable for attachment.

Further, generally, the screwing for fixing the connector 30 to the substrate 37 is performed before soldering the connector connecting terminal 34 to the through hole 41, and other mounting parts such as IC, resistors and capacitors. It was necessary to mount this general electronic component on the board before it was flowed to the solder layer. As described above, the conventional connector requires a two-step working process, which is also a factor that increases the manufacturing cost of the device using the connector.

In view of the above problems, the object of the present invention is to solve the above problems.
When mounting a connector on a board, there is no need for screwing as in the past, so there is no need to provide a screwing opening on the board, and high-density mounting on both sides is possible. Another object of the present invention is to provide a connector for surface mounting which can be mounted on a board in the same soldering step as other general electronic components such as the above and has excellent connection strength with the board. Another object of the present invention is to provide a surface mounting connector which does not require a conventional lock stand, and which also achieves simplification and cost reduction of a connector body. Further, it is an object of the present invention to provide a surface mount connector which can be used for screwing as in the conventional case.

[0007]

According to the present invention, as shown in FIG. 1, a connection terminal 2 for wiring connection, a housing 3 for mounting the connection terminal 2, and an electromagnetic shield for the housing 3 are provided. A surface mount connector comprising a shield case 4 and a ground plate 5 made of conductive metal fittings which can be attached to both ends of the housing 3 for mounting the connector on a mounting board. Provided. The ground plate 5 has a configuration capable of being either soldered onto the mounting board or screwed onto the mounting board, and the connector is provided for accurate positioning or temporary fixing. It is also possible to have a boss 6.

[0008]

The connecting terminal 2 is inserted and fixed in the terminal mounting hole of the housing 3. The ground plate 5 made of the conductive metal has a structure that can be easily fitted or inserted into both ends of the housing 3, and the shield case 4 is covered with the housing 3 after the ground plate 5 is attached to both ends thereof. .. As a result, the ground plate 5 is fixed, and at the same time, the surface of the ground plate 5 on the side of the shield case 4 comes into contact with the shield case 4 and becomes conductive. For this reason, a component equivalent to a die-cast lock stand that is conventionally used for the conduction is unnecessary.

Since the ground plate 5 is formed by molding a metal flat plate into a predetermined shape and is small and has a relatively small heat capacity, the mounting surface side of the ground plate 5 (the surface facing the substrate) is a general electronic component (chip component). It is possible to solder to the pattern on the board in the same manner as in (1). Even though the area is small, the connection strength of the connector can be improved by increasing the predetermined soldering area in addition to the soldering by the connection terminal. As a result, sufficient connection strength can be ensured even if the conventional connector mounting process by screwing is omitted. The boss 6 accurately positions and temporarily fixes the connector at the time of soldering, and also plays a role of securely fixing the connector after soldering. The ground plate 5 also has a conventional structure for screwing, and the connector according to the present invention can be used instead of the conventional connector.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 described above is an exploded perspective view of an embodiment of a surface mounting connector 1 according to the present invention in which its constituent parts are enlarged and drawn at one end. 2 is shown in FIG.
It is a development view of the ground plate 5 shown in FIG. 2A is a plan view, FIG. 2B is a front view, FIG. 2C is a bottom view, and FIG. 2D is a right side view. The shaded portion in (a) of FIG. 2 indicates a portion which is surface-mounted by soldering with the ground pattern or the like of the substrate, and the circular portion at the center causes the soldering area to be too large, which makes soldering difficult. In order to prevent this, a burring process 11 in which a circular hole is formed in the center of the recess is applied. Here, the reason why the burring process 11 is performed instead of simply making a hole is that if the connector has a small soldering strength, the surface mounting advantage described above is lost, but tap processing is performed after the burring process, and This is because the conventional screwing can be performed by making a hole.

Further, the protrusion 14 shown in FIG.
Is to make contact with the above-mentioned shield metal case 4 so that the shield metal case 4 is surely grounded via the ground plate 5. And the other protrusion 1
2 is used to attach the ground plate 5 to the housing 3 by press-fitting it into a groove 16 of FIG. 4, which will be described later, and yet another protrusion 13 has a nut 18 as shown in FIG. 4 (c). Used to fix or prevent its rotation.

FIG. 3 is a development view of the surface-mounting connector according to the present invention. FIG. 3A is a plan view,
(B) is a front view, (c) is a bottom view, and (d) is a right side view. Two shaded portions in (a) of FIG. 3 indicate the same portions as the shaded portions of the ground plate 5 in (a) of FIG. 2 described above, and these are respectively the ground patterns 22 on the substrate shown in FIG. To be soldered to. At that time, the boss 6 shown in FIG. 3 is used for temporary fixing and accurate positioning of the connector 1, and the boss 6 is the boss hole 23 on the substrate shown in FIG.
Is pressed into. Further, the connection terminals 2 used in this example are processed into a so-called Gull-Wing shape (see FIG. 1) suitable for surface mounting, and are soldered to the wiring patterns 24 shown in FIG. 5, respectively. .. The hook 15 of FIG. 3 is provided to ensure the mating of the mutually connected connectors.

The connector 1 is intended to be soldered to the substrate by the same soldering process as that for so-called electronic chip parts and the like. That is, creamy solder is first applied to the pattern on the substrate, and various chip parts such as resistors, capacitors and ICs and the connector 1 according to the present invention temporarily fixed by the boss 6 are mounted thereon. Next, soldering is performed by irradiating the solder portion with a laser instead of the VPS method of melting the solder in a high temperature environment and soldering the parts or the like or the high temperature environment I
Soldering is performed using the R method or the like. Therefore, in this case, the attaching process by screwing the connector as described in the operation is unnecessary.

FIG. 4 specifically shows an example of a structure for attaching the ground plate of the connector 1 according to the present invention. FIG. 4A shows the structure of the housing 3 before the shielding metal case 4 is attached. The nut 18 is inserted into the cavity 17 and the hook 15 made of a small metal piece is inserted into the groove 20. Is inserted. The nut 18 is used for screwing like the conventional connector, and the hook 15 is for ensuring the mating of the male and female connectors to be mutually coupled. The protrusion 19 provided on the side portion of the housing 3 is for fixing the shield metal case 4. FIG. 4B shows a state where the shield metal case 4 and the housing 3 are completely assembled by fitting the protrusions 19 of the housing 3 and the small holes 21 of the shield metal case 4. As a result, the ground plate 5, the nut 18, and the hook 15 are fixed as shown in FIG. 4C which is a partial sectional view on the right side of FIG. 4B. As described above, the protrusion 1 of the ground plate 5 shown in the cross-sectional view of FIG.
3 serves to support the nut 18 and prevent its rotation. In addition, since a space is provided in the upper part of the housing, the heat source used in the soldering process has a structure that easily goes around as shown by the arrow in FIG. 4 (c).

FIG. 5 illustrates printed wiring patterns 22 and 24 on a substrate 25 on which the connector 1 according to the present invention is mounted, and the cream-like solder described above is attached to this portion. The boss 6 is press-fitted into the boss hole 23.
FIG. 6 shows a case in which the connector 1 according to the present invention is mounted on a substrate corresponding to FIG. 5, and after the connector 1 is mounted on the substrate, it is soldered by the above-mentioned VSP method, IR method or the like. .. If screwing is required, holes for screwing are made in the ground pattern 22 of the substrate 25, and the nuts 18 (FIG. 4) of the connector 1 are used to screw the bolts from the back side of the substrate.

FIG. 7 shows another embodiment of the present invention. When the shield case 4 of the connector 1 is not grounded to the ground of the substrate 25, or to the ground pattern on the back surface of the substrate 25 as shown in FIG. It shows an example of the structure in the case of a cat. A part of the ground plate 5'is different from the above-mentioned ground plate 5, and FIG.
As shown in the partial cross-sectional view of FIG. 1, the surface on the substrate side is covered with the housing 3 and thus insulated from the substrate 25. This embodiment is premised on screwing, the ground plate 5'is tapped, and the connector is fixed using screws 26. Since the board mounting surface side of the connector 1 is covered with the housing 3, it is possible to perform more firm screwing.

[0017]

As described above, according to the present invention, the connector can be surface-mounted by soldering.
Further, according to the present invention, holes for screwing on the substrate are not required, and high-density mounting of electronic components by double-sided mounting of the substrate becomes possible. Furthermore, according to the present invention, the connector according to the present invention can be mounted on the board by the same soldering process as that of the general electronic chip component, and the process for mounting the connector is unnecessary, so that the cost for assembling and inspecting the board is reduced. To be done. Further, according to the present invention, the conventional lock stand made of die cast is not required, and the connector body is simplified and the cost is reduced. Further, according to the present invention, mounting by screwing is possible as in the conventional case, and the conventional connector can be easily replaced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a surface mounting connector according to the present invention.

FIG. 2 is a development view of a ground plate according to the present invention.

FIG. 3 is a development view of a surface mounting connector according to the present invention.

FIG. 4 is a diagram schematically showing an example of a structure for mounting a ground plate of a connector according to the present invention.

FIG. 5 is a diagram schematically showing an example of a board pattern for mounting a connector according to the present invention.

FIG. 6 is a diagram schematically showing a board mounting example of a connector according to the present invention.

FIG. 7 is a view showing another embodiment of the surface mounting connector according to the present invention.

8 is a diagram schematically showing an example of screwing the connector of FIG.

FIG. 9 is an exploded perspective view of a conventional board mounting connector.

10 is an external perspective view of the connector of FIG. 9 after assembly.

FIG. 11 is a diagram schematically showing a board mounting example of a conventional connector.

[Explanation of symbols]

 1 ... Surface mount connector 2 ... Connection terminal 3 ... Housing 4 ... Shield metal case 5 ... Ground plate 6 ... Boss 15 ... Hook 18 ... Nut

Claims (4)

[Claims] 1. A connector comprising a connection terminal (2) for wiring connection, a housing (3) for mounting the connection terminal (2), and a shield case (4) for electromagnetically shielding the housing (3). And the shield case (4) attached to both ends of the housing (3) for attaching the connector onto a mounting board.
A surface-mounting connector comprising a ground plate (5) made of a conductive metal member that conducts with the above. 2. The surface mounting connector according to claim 1, wherein the ground plate (5) is soldered onto the mounting substrate. 3. The surface mounting connector according to claim 1, wherein the ground plate (5) is screwed onto the mounting substrate. 4. The surface mount connector according to claim 1, wherein the connector has a boss (6) for accurate positioning and temporary fixing.