JP2002260788A - Connector shield case and electrical connector having the same - Google Patents

Abstract

(57) [Problem] To provide a shield case and an electrical connector having the same, in which the mounting leg of the shield case is strengthened and a shielding effect is enhanced. SOLUTION: A shield case for a connector, which is formed by bending a metal plate into a cylindrical shape and is fitted on a peripheral surface of a housing 10 for holding a terminal, wherein the shield case 20 is located on a mounting bottom surface of the connector. In the connector shield case in which a portion of the mounting leg 23 is cut and raised to form a mounting leg 23, the edge of the notch 26 formed in the shield case main body due to the formation of the mounting leg 23 by cutting and raising is submerged in the plate thickness direction. The crushed portions 27 and 28 are formed, and the edges protrude in a direction in which the notch 26 is narrowed by crushing, and are plastically processed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shield case for a connector and an electric connector having the same.

[0002]

2. Description of the Related Art As an electrical connector having a shield case, for example, the one disclosed in Japanese Patent Application Laid-Open No. H11-185852 is known.

As shown in FIG. 4 of the accompanying drawings, this known connector has a shield case 50 formed by bending a metal plate into a rectangular tube shape. The shield case 50 is fitted on an outer peripheral surface of a housing (not shown) for holding terminals. The fitting is performed by inserting the housing from the opening of the shield case 50. The shield case 5
No. 0 has a locking piece 51 formed by a local U-shaped cut groove as shown in the figure, and this locking piece 51 is pushed inward inclining to lock the housing. Lock with groove. The shield case 50 has mounting legs 52. The mounting legs 52 are formed by partially cutting and raising the shield case 50. This mounting leg 52
Is located substantially flush with the bottom surface of the shield case 50 so as to face a circuit board or the like on which the connector is mounted. The mounting leg 52 is fixed at a predetermined position on the circuit board by soldering or the like.

[0004]

However, in the electric connector having the above-mentioned known shield case, a large notch remains due to the formation of the mounting leg by cutting and raising.
Therefore, the strength of the periphery and the electrical characteristics are reduced.

A fixing leg bears a fixing force of the connector to the circuit board. Therefore, when a large external force acts on the mounting leg, if the strength of the mounting leg is low, the connector may be loosened. If the size of the mounting leg is increased in order to ensure the strength of the mounting leg itself, the notch becomes large, and the effect is remarkable. By the way, if the mounting legs are made small, the strength of the mounting legs themselves cannot be secured. or,
If you increase the size of the mounting legs to improve the strength of the mounting legs,
The notch becomes large and the shielding effect is reduced electrically.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a shield case capable of maintaining a good shield effect without reducing the strength of the mounting leg and its surroundings, and an electric connector having the same.

[0007]

SUMMARY OF THE INVENTION A connector shield case according to the present invention is a connector shield case which is formed by bending a metal plate into a cylindrical shape and which is fitted to a peripheral surface of a housing for holding terminals. A part of the shield case is cut and raised so as to be located on the mounting bottom surface of the connector to form a mounting leg.

In this connector shield case, according to the present invention, the notch formed in the shield case main body by the cut-and-raised formation of the mounting leg has a crushed portion which is sunk in the plate thickness direction, and the notch is formed by crushing. It is characterized in that the edge is extended and plastically worked in the direction to narrow the part.

According to the shield case of the present invention, the mounting legs can be made relatively large, and the strength is improved accordingly. When the mounting leg is cut and raised to increase the size, the notch portion also becomes large. However, in the present invention, the edge of the notch portion is overhanged by the formation of the crushed portion and undergoes plastic working, so that the notch portion remains only narrow. Therefore, the shielding effect is improved electrically.

In the present invention, the crushed portion is preferably formed in a region near the edge of the notch. The crushed portion is desirably formed in a large area in the vicinity of the notch to make the overhang plastic working effective, but may be crushed to the edge.

[0011] It is further preferable that the mounting leg has a window portion, a portion corresponding to the window portion is present as an uncut portion in the shield case main body, and a crushed portion is also formed in the uncut portion. . By doing so, the notch can be easily narrowed from both sides by the crushed portions both in the vicinity of the edge of the notch and in the uncut portion, even though the mounting leg can be further enlarged.

According to the present invention, the electrical connector is obtained by fitting the shield case on the peripheral surface of the housing for holding the terminals. When the terminals of the electrical connector are soldered to a circuit portion such as a circuit board, the strength and the shielding effect can be further improved by closing the narrowed notch with solder.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG.
An embodiment of the present invention will be described based on the above.

In the electrical connector shown in FIG. 1, a rectangular cylindrical shield case 20 is fitted around an outer periphery of a housing 10 for holding terminals.

A plurality of receiving holes 11 for receiving terminals of a mating connector (not shown) are formed on the front surface of the housing 10, and connected terminals (not shown) are arranged in the receiving holes 11. I have. A fitting space 12 is formed around the front part (left part in the figure) of the housing 10 between the housing 10 and the shield case 20, and the fitting part of the mating connector enters the fitting space 12. And fitted.

The shield case 20 is formed in a substantially cylindrical shape by bending a metal plate. This cylindrical shield case 20 has a joint 21 at the bottom. At the periphery of the front opening of the shield case 20, there is formed an introduction portion 22 which is rounded and bent outward to facilitate introduction of a mating connector.

On the front side surface of the shield case 20,
Attachment leg 23 made by cutting a part of the shield case
Is provided. As shown in FIG. 2 shown in an enlarged manner, the mounting leg 23 is
The shield case 20 stands in an L-shape from the bottom surface.
The cutting is performed so that a window 24 is formed in the mounting leg 23, and a portion corresponding to the window 24 is left as an uncut portion 25 on the main body side of the shield case. Therefore, the uncut portion 25 is present in the notch 26 caused by the overcut of the mounting leg 23, and as a result, the notch 26 has an inverted U-shape surrounding the uncut portion 25 on three sides. .

In this embodiment, the crushed portion 2 crushed in the thickness direction is formed in the edge of the cutout 26 and the uncut portion 25.
7, 28 are formed. The crushing parts 27 and 28
An appropriate tool is pressed strongly against the edge of the notch 26 and the surface of the uncut portion 25 to perform plastic working so as to form a recess. The material corresponding to the concave portion projects in the direction of narrowing the cutout portion 26, that is, in the direction of the edge, and in the drawing, the cutout edge and the uncut portion come closer (see FIG. 3). : Figure 3
(A) shows the state before crushing, and FIG. 3 (B) shows the state after crushing. ). Thereby, the notch 26 is sufficiently narrowed.

The crushed portion is not limited to that shown in FIG.
It may extend to the notch or the edge of the uncut portion (see FIG. 3C).

As described above, according to the present embodiment, the mounting leg having the window can be set large, while the cutout can be made extremely narrow. This means that the strength of the mounting leg is high and the shielding effect is electrically high.

When the connector according to the present embodiment is used, it is arranged on a circuit board (not shown), and the connection portion of the terminal is connected to the corresponding circuit portion of the circuit board by soldering.

When the solder is applied to the notched portion 26 which has been narrowed, the notched portion 26 is sufficiently narrow so that the notched portion 26 is completely closed by the solder. By doing so, the strength and the shielding effect are further improved.

[0023]

As described above, according to the present invention, the mounting leg is formed by cutting a part of the shield case, and the notch formed by the cutting is crushed in the thickness direction by cutting the edge of the notch. Because the edge is narrowed by plastic working so that the edge protrudes, the notch can be made sufficiently small even if the mounting leg is sufficiently large, so the strength of the mounting leg and its surroundings will be reduced. The shielding effect can be improved without the need. If the notch is sufficiently small, the notch is closed with solder, so that the strength and the shielding effect are further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric connector according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a mounting leg of the connector of FIG. 1 and its periphery.

3A and 3B are cross-sectional views of a cutout portion and an uncut portion shown in FIG. 2, wherein FIG. 3A shows a state before crushing and FIG.
(C) shows the state after the crushing process in which the crushed portion reaches the end of the notch or the uncut portion.

FIG. 4 is a perspective view showing a shield case of a conventional electrical connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Housing 20 Shield case 23 Mounting leg 24 Window part 25 Uncut part 26 Notch 27, 28 Crush part

Claims (5)

[Claims] A shield case for a connector, which is formed by bending a metal plate into a cylindrical shape and is fitted on a peripheral surface of a housing for holding a terminal, wherein the shield case is located at a mounting bottom surface of the connector. In a connector shield case that is partially cut and raised to form a mounting leg, a crushed portion that is immersed in the plate thickness direction is formed at the edge of the cutout portion formed in the shield case main body due to the cut and raised of the mounting leg. A shield case for a connector, wherein an edge portion is extended and plastically worked in a direction to narrow a notch portion by crushing. 2. The connector shield case according to claim 1, wherein the crushed portion is formed in a region near an edge of the notch. 3. The mounting leg has a window portion, a portion corresponding to the window portion is present as an uncut portion in the shield case main body, and a crushed portion is also formed in the uncut portion. Item 2. A shield case for a connector according to Item 1. 4. A housing for holding a terminal, and a housing.
An electrical connector, comprising: the shield case according to claim 3, wherein the shield case is fitted to a peripheral surface of the housing. 5. The electrical connector according to claim 4, wherein the narrowed notch is closed with solder.