JP2006289472A - Metal plate joint structure and shield case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength of a joint portion of a metal plate, particularly the strength against a force applied from a direction perpendicular to the plate surface.
A tip section of one of the metal plates to be joined is formed into an inclined section having a predetermined angle with respect to the plate surface, and the other tip section of the metal plate to be joined is formed at the same angle and on the plate surface The tip of the metal plate with the inclined section formed in the opposite direction and the tip of the metal plate with the inclined section formed in the opposite direction with respect to the plate surface are joined and joined. Then, one side or both sides of the plate surface near the joint is crushed.
[Selection] Figure 8

Description

  The present invention relates to a metal plate joining structure and a shield case. Specifically, the present invention relates to a metal plate joint structure and a shield case for improving the strength of the joint portion of the metal plate, particularly the strength against the force applied from the vertical direction of the plate surface.

  As a structure of an electrical connector, it is known to surround a housing to which a connection terminal made of conductive metal is attached with a metal shield case or the like in order to protect it from electrical noise.

  This shield case is formed by punching a metal plate into a predetermined unfolded shape, bending the punched metal plate and joining both ends to surround the housing described above. A concave part (or convex part) is formed at the tip part, and a convex part (or concave part) that conforms to this is formed at the other tip part so that it does not come off or rattle when both tip parts are joined. It has a shape that allows both to enter.

As such an electrical connector with a shield case, for example, as shown in FIG. 9, a metal plate is formed by punching into a predetermined unfolded shape, and is formed by bending the metal plate. After the elastic lock piece 104 is bent inwardly, it is formed into a rectangular tube shape, and when forming into a rectangular tube shape, the joint portion 102 is formed by joining metal-side joining edges (tip portions) 101a and 101b. A rectangular tube case 100, which is in close contact with each other and has a substantially square wave shape that enters into each other and has a large square wave shape so that the joint portion 102 bypasses the center position of the upper surface on the upper surface of the case, is used as a shield case. There is an electrical connector with a square tube that is surrounded and held (see Patent Document 1).
Japanese Patent Laying-Open No. 2004-192834 (5th page, FIG. 2)

  However, since the cross-section of the tip of the metal plate to be joined is perpendicular to the plate surface, there is a problem that the joint strength is weak against the force applied from the vertical direction of the plate surface when fitting and joining. is there.

  For example, like the metal plate 10 shown in FIG. 10 (a), the concave portion 2 (FIG. 10 (b) )), The other tip portion 1b is formed with a convex portion 3 (FIG. 10C) and is bent so that the tip portion 1a and the tip portion 1b of the metal plate 10 face each other as shown in FIG. 11A. Then, as shown in FIG. 11B, the concave portion 2 of the tip portion 1a and the convex portion 3 of the tip portion 1b are fitted and joined to form a shield case or the like surrounding the electrical connector.

  At this time, the tip cross section of the tip portion 1a / 1b of the metal plate 10 is perpendicular to the plate surface as shown in FIG. 12 (a), and as shown in FIG. 12 (b), the tip portion 1a. In the joint portion 11 in which the concave portion 2 and the convex portion 3 of the front end portion 1b are fitted and joined, both front end cross sections are in contact with each other at right angles to the plate surface, and the vertical direction of the plate surface (plate thickness) The force applied from the (d direction) has almost no strength.

  For example, in the above-mentioned Japanese Patent Application Laid-Open No. 2004-192834 (see FIG. 9), the strength of the joint portion is obtained by a method in which a part of the joint portion is subjected to crushing or bending joining or by joining both tip portions. However, when the strength of the joint portion is improved by these methods, there arises a problem that the joining process becomes complicated or the joint portion becomes thick.

  Therefore, when the metal plate is joined by fitting the concave portion and the convex portion provided at the tip portion, the joining process becomes complicated, and the strength is improved without giving the joint portion a thickness. There is a problem to be solved by improving the strength against the force applied from the vertical direction.

  In order to solve the above-described problems, the metal plate joining structure and the shield case according to the present invention are configured as follows.

(1) A metal plate joining structure in which a projection formed on one tip of a metal plate to be joined and a recess formed on the other tip are fitted and joined, and one tip of the metal plate to be joined The cross section is formed into an inclined cross section having a predetermined angle with respect to the plate surface, and the other end cross section of the metal plate to be joined is at the same angle as the inclined cross section and opposite to the plate surface A metal plate having a tilted cross section formed at a tip end portion of the metal plate on which the tilted cross section is formed and the same angle as the tilted cross section and opposite to the plate surface The metal plate joining structure characterized by fitting and joining the front-end | tip part of this, and crushing the plate | board surface of this joined part vicinity.
(2) The metal plate joint structure according to (1), wherein one side of the plate surface near the joint is crushed.
(3) The metal plate joining structure according to (1), wherein both surfaces of the plate surface in the vicinity of the joining portion are crushed.

  (4) A shield case for a connector that is formed by bending a metal plate and fitting a convex portion formed on one tip portion and a concave portion formed on the other tip portion, and joining the joint. The other end cross section of the metal plate to be joined is at the same angle as the inclined cross section and opposite to the plate surface. The tip of the metal plate formed on the inclined cross section, and the tip of the metal plate on which the inclined cross section is formed, and the tip of the metal plate on which the inclined cross section is formed at the same angle as the inclined cross section and opposite to the plate surface The shield case characterized by fitting and joining a part, and crushing the plate | board surface near this joined part.

  As in the above configuration, one end cross section of the metal plate to be joined is formed into an inclined cross section having a predetermined angle with respect to the plate surface, and the other end cross section is at the same angle and opposite to the plate surface The tip of the metal plate with the inclined cross section formed and the tip of the metal plate with the inclined cross section formed in the opposite direction with respect to the plate surface are joined and joined together. By crushing the plate surface in the vicinity of the joined portion, a joining structure is obtained in which the other tip portion supports the force applied from the vertical direction of the plate surface.

  In the present invention, an inclined section with a predetermined angle is formed at one tip of the metal plate to be joined, an inclined section at the same angle and opposite to the plate surface is formed at the other tip, By fitting and joining these tip parts, the inclined cross sections of each tip part are overlapped and joined, so that the force applied from the vertical direction of the plate surface is supported by the joined tip part, This provides an excellent effect that the bonding with improved bonding strength with respect to the vertical direction of the plate surface becomes possible.

  Next, embodiments of the metal plate joining structure and shield case of the present invention will be described with reference to the drawings. However, the drawings are only for explanation, and do not limit the technical scope of the present invention.

  The connector shield case formed using the metal plate joining structure of the present invention will be described as an example. The shield case is bent and formed by punching a metal plate into a predetermined developed shape and fitting the tip portion so as to surround the connector or the like. In addition, in order to make an understanding easy, the same code | symbol is attached | subjected and demonstrated to the part equivalent to the joining structure and shield case (FIGS. 10-12) of the conventional metal plate.

  First, the metal plate to be a shield case is shaped so as to be inserted into each other so that it does not come off when the tip portions are fitted together, so that the metal plate 10 is fitted to one tip portion 1a of the metal plate 10 as shown in FIG. A fitting convex part 3 is formed in the joint concave part 2 and the other tip part 1b.

  For example, as shown in FIG. 2, the fitting convex portion 3 is formed in a convex shape (FIG. 2A) having a spread toward the distal end and having a constriction near the root, and the fitting concave portion 2 is The tip of the tip 1a / 1b of the metal plate 10 is formed in a concave shape (FIG. 2 (b)) that matches the shape of the fitting convex 3, and the fitting concave 2 and the fitting convex 3 are formed. The cross section is an inclined cross section having a predetermined angle with respect to the plate surface.

  For example, as shown in FIG. 3 (a), the tip section of the tip portion 1a where the fitting recess 2 is formed forms an upward inclined section 1ax at a predetermined angle with respect to the plate surface. The tip section of the tip portion 1b where the portion 3 is formed has the same angle as the tilted section 1ax of the tip portion 1a and is opposite to the tilted section 1ax with respect to the plate surface (downward in the figure). An inclined section 1bx is formed in

  In addition, as shown in FIG. 3B, the tip cross-section of the tip portion 1a in which the fitting recess 2 is formed so as to be opposite to the direction of FIG. The inclined section 1ax is downwardly inclined with respect to the plate surface, and the distal end section of the distal end portion 1b on which the fitting convex portion 3 is formed is the same angle and has an inclined section 1bx which is upward with respect to the plate surface. May be.

  Thus, the metal plate 10 having the tip portion 1a formed with the inclined section 1ax and the tip portion 1b formed with the inclined section 1bx is further punched based on a predetermined developed shape.

  For example, in the case of the shield case 10A shown in FIGS. 4 and 5, the metal plate 10 includes a notch portion 4 for forming the connector mounting opening 13 into which the connector 20 is fitted, and a leg piece portion 5 for soldering to the circuit board. A bent portion 6 for guiding the plug to be inserted; a retaining bent portion 7 for restraining the housing of the connector 20 to be fitted from the left and right; a rectangular convex portion 8 for aligning with the circuit board; A punching process is performed on the basis of a predetermined developed shape so that a restraining bent portion 9 and the like are formed to restrain the housing of the fitted connector 20.

  When the punched metal plate 10 is bent into a rectangular tube shape and formed, a shield case 10A as shown in FIGS. A shield case 10A shown in FIGS. 4 and 5 is a connector 20 (a dotted line in the figure) in which a plurality of terminals 21 formed of a conductive metal are disposed at a predetermined pitch in a housing formed of an insulating material or the like. ). 4A is a plan view of the shield case, FIG. 4B is a front view, and FIG. 5 is an external view.

  The notch 4 of the metal plate 10 is formed as a connector mounting opening 13 for fitting the connector 20 in the center of one opening on the joining surface a side facing a circuit board (not shown). The piece 5 is positioned at a substantially central portion at both the left and right ends of the joint surface a facing the circuit board (not shown), and is bent outward.

  Further, the bent portion 6 is located at both left and right edge portions on the plug insertion port 12 side which is the opening on the opposite side of the connector mounting port 13 and is bent inwardly of the plug insertion port 12, and the rectangular convex portion 8 is When formed on a rectangular tube, the left and right central portions of the bonding surface a of the circuit board are positioned.

  In addition, the restraining bent portion 7 is located at the edge of the side surface b, c, which is the left and right side walls, on the connector mounting port 13 side, and is bent inwardly of the connector mounting port 13 when the connector 20 is fitted. The housing of the connector 20 is restrained from the left and right, and the restraining bent portion 9 is a surface d opposite to the joint surface a of the circuit board, and is located near the center of the distal end portion on the connector mounting opening 13 side. When fitted, the housing of the connector 20 is restrained by bending inward of the connector mounting opening 13.

  As shown in FIG. 6A, when the metal plate 10 is bent so as to fit and surround the connector 20, the tip portion 1a and the tip portion 1b of the metal plate 10 are formed as shown in FIG. Since they face each other, as shown in FIG. 6B, the fitting concave portion 2 of the tip portion 1a and the fitting convex portion 3 of the tip portion 1b are fitted and joined.

  Then, as shown in FIG. 7, the vicinity of the joint 11 is crushed by a press or the like to increase the joint strength. At this time, either the upper surface or the lower surface of the plate surface may be crushed near the joint portion 11 or may be crushed from both the upper and lower surfaces in order to further increase the bonding strength.

  In this way, the joint portion 11 between the tip portion 1a and the tip portion 1b of the metal plate 10 is connected with the fitting concave portion 2 formed on the tip portion 1a and the fitting convex portion 3 formed on the tip portion 1b entering each other. It will be in the stopped state, and will have joint strength with respect to the force pulled in the left-right direction.

  Further, as shown in FIG. 8, the inclined cross section 1ax formed at the front end portion 1a and the inclined cross section 1bx formed at the front end portion 1b are cross sections having the same angle and opposite directions (vertical direction) with respect to the plate surface. Since the inclined cross-sections overlap when they are fitted together and are joined in a state in which the force applied from the vertical direction of the plate surface is supported by the tip of each other, it is relative to the vertical direction (vertical direction) of the plate surface It becomes a joining structure also provided with joining strength.

  In addition, although the shield case which bent-molded one metal plate was demonstrated to the example, even when joining separate metal plates, it fits at the same angle to the tip part to which each metal plate is joined. By forming the inclined cross-sections that are opposite to each other with respect to the plate surface, it is possible to join with the same joining structure as described above.

It is explanatory drawing for demonstrating one Example of the metal plate joined by the joining structure of the metal plate which concerns on this invention. It is explanatory drawing for demonstrating the state of the front-end | tip part of the metal plate shown in FIG. It is sectional drawing for demonstrating the inclination cross section formed in the front-end | tip part of the metal plate shown in FIG. It is the top view and front view of a shield case which are one Example in the joining structure of the metal plate which concerns on this invention. It is the perspective view which showed the external appearance of the shield case shown in FIG. It is explanatory drawing for demonstrating a state when the front-end | tip parts of the metal plate shown in FIG. 1 are fitted and joined. It is explanatory drawing when crushing the junction part vicinity of the metal plate shown in FIG. It is sectional drawing for demonstrating the joining state of the front-end | tip part shown in FIG. It is an external view of the shield case of the electrical connector illustrated in order to demonstrate the joining structure of the metal plate in a prior art. It is explanatory drawing for demonstrating the metal plate in a prior art, and the front-end | tip cross section of the front-end | tip part. It is explanatory drawing for demonstrating a state when fitting and joining the front-end | tip part of the metal plate of FIG. It is sectional drawing for demonstrating the joining state of the front-end | tip part of the metal plate shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10; Metal plate 1a / 1b; Tip part 1ax; Inclined cross section 1bx; Inclined cross section 2; Fitting concave part 3; Fitting convex part 4; Notch part 5; Leg piece part 6; Bending part 7; Rectangular convex part 9; Detention bent part 10A; Shield case 11; Joining part 12; Plug insertion port 13; Connector insertion port 20; Connector 21;
101a / 101b; joining side edge (tip)
102; Joining part 103; Bending part 104; Elastic lock piece

Claims (4)

A metal plate joining structure for fitting and joining a convex portion formed on one tip portion of a metal plate to be joined and a concave portion formed on the other tip portion,
Forming one end cross section of the metal plate to be joined into an inclined cross section having a predetermined angle with respect to the plate surface;
The other end cross section of the metal plate to be joined is formed into an inclined cross section having the same angle as the inclined cross section and opposite to the plate surface,
The front end portion of the metal plate with the inclined cross section formed therein and the front end portion of the metal plate with the inclined cross section formed in the opposite direction with respect to the plate surface are fitted and joined, and the plate in the vicinity of the joined joint portion A metal plate joining structure characterized by crushing a surface. The metal plate joining structure according to claim 1, wherein one side of the plate surface in the vicinity of the joining portion is crushed. The metal plate joining structure according to claim 1, wherein both sides of the plate surface in the vicinity of the joining portion are crushed. It is a shield case for a connector that fits and joins a convex portion formed on one tip portion by bending a metal plate and a concave portion formed on the other tip portion,
Forming one end cross section of the metal plate into an inclined cross section having a predetermined angle with respect to the plate surface;
The other end cross section of the metal plate to be joined is formed into an inclined cross section having the same angle as the inclined cross section and opposite to the plate surface,
The front end portion of the metal plate formed with the inclined cross section and the front end portion of the metal plate formed with the inclined cross section opposite to the plate surface are fitted and joined, and the plate in the vicinity of the joined joint portion Shield case characterized by crushing the surface.

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