JPH0660066U - Surface mount connector - Google Patents

Abstract

(57) [Summary] [Objective] To provide a surface mount connector that is small in size, low in cost, and does not occupy a large area on a printed circuit board. [Structure] A fixing metal fitting 3 to be attached to a housing 2 and soldered to a metal pad P on a printed circuit board A has an L-shaped cross section. Further, the fixing metal fitting 3 is mounted in the direction shown in the drawing to be brought into close contact with the outer surface of the side wall of the housing and the outer surface of the bottom wall thereof, and is fixed to the housing by being prevented from coming off by the projection 2a provided on the side wall of the housing. The L-shaped fixing bracket requires less material and processing costs. Further, if the metal fitting is fixed by the protrusion, the outer diameter of the connector does not increase. Further, since the metal fitting is connected to the metal pad on the lower side of the housing in the direction of the drawing, the occupied area on the printed circuit board does not increase.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a surface mount connector which is soldered and fixed to a printed circuit board or the like. More specifically, it is a surface mount connector that has been downsized, reduced in cost, and reduced in the area occupied on the board.

[0002]

[Prior art]

 A surface-mount connector is one in which a plurality of terminals, which are electrically connected by being soldered to a printed circuit on the surface of a printed circuit board, are housed and fixed at a predetermined pitch in an insulative housing by press fitting or insert molding.

In this connector, if wobbling occurs when the mating connector is inserted and removed, unreasonable stress is applied to the solder joint of the terminal to the printed circuit and the joint is peeled off. In that case, it is particularly required to firmly fix it on the substrate.

Therefore, in such a case, a fixing metal fitting is attached to the housing, and this fixing metal fitting is simultaneously soldered to the metal pad on the substrate at the time of the reflow soldering of the terminal to meet the demand. There is.

The above-mentioned fixing metal fittings used conventionally are processed into a U-shape or an L-shape as shown in Japanese Utility Model Laid-Open No. 2-97757.

FIGS. 4 to 6 show how to attach the fixing metal fittings to the housing. The U-shaped fixing metal fitting 13 has a hook portion at one end provided on the side wall of the housing 12 as shown in FIG. It is attached to the housing by being press-fitted into the fitting groove 14 or, as shown in FIG. 5, being held by the side portions of the housing so as to sandwich the upper and lower surfaces of the housing 12.

On the other hand, as shown in FIG. 6, the L-shaped fixing member 23 has an ear portion 15 and a housing bottom wall, one end of which is provided on the outer surface of the side wall of the housing so that the other end faces the outside of the housing 12. It is press-fitted into the fitting groove at the end and attached.

[0008]

[Problems to be solved by the device]

 In the surface mount connector of FIG. 4, since the fixing metal fitting 13 is press-fitted into the housing, the external dimension of the connector is increased by the press-fitting margin of the metal fitting, which is against the trend of miniaturization of the connector.

Further, since the fixing metal fitting is U-shaped, it is disadvantageous in terms of material cost and processing cost.

In the connector shown in FIG. 5, since the U-shaped fixing bracket is held on the outside of the housing, the problem of increasing the outer dimension of the connector does not occur, but there is the same cost problem as described above. .

Further, the connector of FIG. 6 using the L-shaped fixing bracket 23 requires less material cost than the former two, but the other end of the fixing bracket joined to the metal pad P on the substrate is Since it largely protrudes outside the housing, it occupies a large area on the board, making it difficult to meet the demand for high-density mounting.

An object of the present invention is to eliminate these problems.

[0013]

[Means for Solving the Problems]

 The present invention provides two means to solve the above problems. Among them, the first means uses a fixture having an L-shaped cross section. Then, the metal fitting is brought into close contact with the outer surface of the side wall and the outer surface of the bottom wall, and the protrusion provided on the side wall of the housing is fixed to the hole provided in the fixing metal fitting in correspondence with the protrusion to fix the metal attachment to the housing. .

Further, in the second means, a flat plate-like fixing metal fitting is used, and the fixing metal fitting is put along the bottom wall of the housing, and the edge portion of the metal fitting is inserted into the bottom wall so as to be supported by the bottom wall. Fix it.

The fixing of the flat plate-shaped fixing fitting to the bottom wall of the housing may be performed by either a structure in which the peripheral edge of the fitting is embedded in the bottom wall or a structure in which the fitting is press-fitted in a T slot provided in the bottom wall. Good.

[0016]

[Action]

 The L-shaped fixing bracket and the flat-shaped fixing bracket require less material cost than the U-shaped fixing bracket and are easy to process.

Further, the L-shaped fixing metal fitting is closely adhered to the outer surface of the bottom wall and the outer surface of the side wall of the housing and fixed by the protrusion of the side wall, while the fixing metal fitting of the flat plate is supported by the bottom wall and fixed to the bottom surface of the housing. Since both the metal fittings are soldered on the lower side of the housing, the outer dimensions of the housing and the occupied area of the connector on the board do not increase.

[0018]

【Example】

 FIG. 1 shows an example of a surface mount connector using the first means.

In the figure, 1 is a terminal, 2 is a resin housing, and 3 is an L-shaped fixing metal fitting. A plurality of terminals 1 are arranged at a predetermined pitch, and are press-fitted into the housing 2, and are accommodated and fixed by insert molding or the like. The rear portion of this terminal is drawn out of the housing, and the end portion bent parallel to the bottom surface of the housing is reflow-soldered and joined to the printed circuit on the printed circuit board A.

Reference numeral 2 a is a resin-made projection integrally formed on the side wall of the housing 2, and the fixing tool 3 is provided with a hole 3 a into which the projection 2 a is inserted. It is desirable that the hole 3a has a hole diameter on the outlet side larger than that on the inlet side as shown in the figure.

Two of the fixing metal fittings 3 configured as described above are attached to both sides of the housing 2 in the orientation shown in FIG. 1B, and one end of the metal fittings is attached to the outer surface of the side wall of the housing 2 and the other end is attached. To the outer surface of the bottom wall. Then, the tip side of the projection 2a inserted into the hole 3a is heated and softened to expand the diameter, and the metal fitting 3 is prevented from coming off at the expanded diameter portion and integrated with the housing.

In FIG. 1C, the completed surface mount connector 10 is positioned and set on the printed circuit board, and when the reflow soldering of the terminal 1 is performed, the fixing metal fitting 3 is bonded to the metal pad P on the printed circuit board with the solder 4. It shows a cross section in the state of being.

FIG. 2 is an example of a surface mount connector using the second means.

As shown in the figure, here, a flat plate-like fixing member 5 having a non-return claw 5a on its side edge (this claw can be omitted) is used. The bottom wall of the housing 2 is provided with a T-slot 2b, in which the fixing metal fitting 5 is press-fitted until the metal fitting is completely hidden under the housing 2, and the fixing metal fitting P is attached to the metal pad P on the printed circuit board A. It is designed to be joined with solder 4 on.

Although the fixing fitting 5 is press-fitted in the arrangement direction of the terminals 1 in the figure, the fixing fitting 5 can be inserted into and removed from the mating connector by changing the orientation of the T slot 2b by 90 °. Good.

Further, as shown in FIG. 3, the fixing of the flat plate-shaped fixing fitting 5 to the housing 2 may be performed by embedding the peripheral edge of the fitting 5 in the bottom wall of the housing 2.

Although not shown in the drawing, it is preferable that a protrusion, a groove, or the like for positioning the connector 10 on the printed board is provided on the bottom of the housing 2.

[0028]

[Effect of device]

 As described above, the surface mount connector of the present invention can reduce the cost because the material cost and the processing cost of the fixing metal fitting are small.

Further, since the outer dimension of the housing and the occupied area on the board are not increased, the connector is more advantageous than the conventional connector in terms of downsizing and high-density mounting on the board.

[Brief description of drawings]

FIG. 1A is a perspective view showing an example of a surface mount connector of the present invention mounted on a printed circuit board. FIG. 1B is a cross-sectional view showing how to mount a fixing bracket of the same connector. FIG. 1C is mounted on a printed circuit board. Cross section of a connector

FIG. 2A is a perspective view of a connector according to another embodiment. FIG. 2B is a cross-sectional view of the connector of the above example attached to a printed circuit board.

FIG. 3 is a perspective view of a bottom surface side of a connector in which a flat plate-like fixing member is embedded and attached in a housing.

FIG. 4 is a perspective view showing an example of a conventional surface mount connector.

FIG. 5 is a perspective view showing another example of a conventional surface mount connector.

FIG. 6 is a perspective view showing still another example of the conventional surface mount connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 terminal 2 housing 2a protrusion 2b T slot 3 L-shaped fixing metal fitting 3a hole 4 solder 5 flat plate fixing metal fitting 5a non-return pawl A printed circuit board P metal pad

Claims (2)

[Scope of utility model registration request] 1. A plurality of terminals, which are electrically connected by being soldered to a printed circuit on the surface of a substrate, are accommodated and fixed at a predetermined pitch in an insulative housing by a method such as press fitting or insert molding, and a fixing metal fitting is attached to the housing. In a surface mount connector in which this mounting bracket is attached and soldered to a metal pad on the substrate to secure it to the substrate, the mounting bracket is made to have an L-shaped cross section, and is brought into close contact with the outer surface of the side wall of the housing and the outer surface of the bottom wall so that A surface mount connector characterized in that a protrusion provided is locked to a hole provided in a fixing metal fitting corresponding to the protrusion to fix the metal fitting to a housing. 2. A flat plate-shaped fixing bracket is used in place of the fixing bracket according to claim 1, the fixing bracket is fitted to the bottom wall of the housing, and the edge of the fitting is inserted into the bottom wall. Surface mount connector supported and fixed by the bottom wall.