JP2007172926A - Ground terminal, and electronic equipment equipped with the terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a ground terminal improved in heat radiation efficiency by enlarging an area contacting a counterpart. <P>SOLUTION: The center part of an elastic metal plate is turned into a center flat surface plate part 2. Both sides of the center flat surface plate part 2 are folded back toward the same plate face side as elastic bending parts 3, 4 respectively. In respective end parts of respective elastic bending parts 3, 4, contact parts 5, 6 are installed respectively. The whole width of one of the elastic bending part 3 of both elastic bending parts is formed to have a narrower width than that of the center flat surface part 2. On the other elastic bending part 4, the elastic metal plates remaining on both sides of the window part are turned into elastic bending parts at the others, by forming a window part 7 on the elastic metal plate. At the tip part of an elastic bending part 4, the elastic metal plate left on the other end part side opposite to the center flat surface plate part of the window part is turned into a flat plate-shaped contact part 6 integrated with whole other respective elastic bending parts. Both elastic bending parts are folded back on the plate face of the central flat plate part 2 in a window part 7 laid between the other elastic bending parts 4 through an elastic bending part 3 at one side respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an earth terminal used for grounding an electronic device and performing heat dissipation, and an electronic device including the earth terminal.

A conventional earth terminal is composed of a cantilevered metal spring that contacts a free end piece with a counterpart, or a cantilevered metal spring that contacts a contact portion with a counterpart (see, for example, Patent Document 1).
Japanese Patent No. 3338976

  However, such a conventional earth terminal has a problem that the contact area with the counterpart is one line that forms one line or one point that forms one point, so that the grounding area is small and heat radiation cannot be performed sufficiently. It was.

  An object of the present invention is to provide an earth terminal capable of increasing a contact area with a counterpart and improving heat dissipation efficiency.

The structure of the present invention that achieves the above object will be described. The invention according to claim 1 is characterized in that the central portion of the elastic metal plate is a central flat plate portion, and both sides of the central flat plate portion are elastic. In an earth terminal that is folded back to the same plate surface side as a bent portion and provided with a contact portion at each end of each elastic bent portion, the entire width of one elastic bent portion of both elastic bent portions Is formed narrower than the central plate part,
The other elastic bending portion of the two elastic bending portions forms the elastic metal plate left on both sides of the window portion by forming a window portion on the elastic metal plate, and becomes the other elastic bending portion, The elastic metal plate left on the end of the window portion opposite to the central flat plate portion at the tip of the elastic bent portion is a flat plate-like contact portion integrated with the other elastic bent portion. None,
Both elastic bent portions are folded back on the plate surface of the central flat plate portion through the one elastic bent portion in the window portion between the other elastic bent portions.

  The invention according to claim 2 is characterized in that, in addition to the configuration of claim 1, the center plane plate portion is integrally formed from the center in the width direction on one end side of the center plane plate portion so as to be narrow. The one elastic bent portion is extended, and the window portion is positioned in the center portion in the width direction of the other end of the central flat plate portion, thereby moving the other elastic bent portion in the width direction of the central flat plate portion. It exists in extending at both ends.

  Furthermore, a feature of the invention described in claim 2 resides in an electronic device including a ground terminal having the configuration of claim 1 or 2.

    In the ground terminal of the present invention, the central portion of the elastic metal plate is a central flat plate portion, and both sides of the central flat plate portion are folded back as elastic bent portions on the same plate surface side, respectively, Since the contact portions are provided at the end portions, both ends of the elastic metal plate are contact portions, the contact area with the counterpart can be increased, and the heat dissipation efficiency can be improved. The entire width of one of the elastic bent portions is narrower than the central flat plate portion, and the other elastic bent portion of the two elastic bent portions has a window portion on the elastic metal plate. By forming the elastic metal plate left on both sides of the window portion as the other elastic bent portion, the end of the elastic bent portion on the side opposite to the central flat plate portion of the window portion The elastic metal plate remaining on each of the other elastic flexures A flat plate-shaped contact portion integrated with the first portion, and the two elastic bent portions are folded back onto the plate surface of the central plane plate portion through the one elastic bent portion in the window portion between the other elastic bent portions. As a result, one contact part makes line or point contact with the other party, and the other contact part makes surface contact with the other party, so that the contact area with the other party is remarkably increased, and the heat radiation efficiency can be remarkably improved.

  Further, from the center in the width direction on one end side of the central flat plate portion, the one elastic bent portion formed so as to be narrow with the central flat plate portion is extended, and the central flat plate portion The yield of the elastic metal plate as a material is increased by locating the window portion at the center portion in the width direction of the other end and extending the other elastic bent portion at both ends in the width direction of the center plane plate portion. Can be manufactured at low cost.

  Furthermore, by using the earth terminal as described above for an electronic device, a high heat dissipation effect can be obtained at a low cost, and the function of the electronic component affected by the heating can always be maintained in a good state.

  Hereinafter, an example of the best mode for carrying out an earth terminal according to the present invention will be described with reference to the drawings.

  The earth terminal 1 of this example is an earth terminal that is brought into contact with the other party to perform earthing and heat dissipation.

  In the earth terminal 1, a central portion of an elastic metal plate such as a copper alloy is a central flat plate portion 2. One side of the central flat plate portion 2 is a contact plate surface 2a. A pair of projecting portions 2b are formed on the plate surface 2c opposite to the central flat plate portion 2 along the longitudinal direction of the central flat plate portion 2 at portions near both sides in the width direction of the central flat plate portion 2. It has been launched.

  Both sides of the central plane plate portion 2 are folded back as elastic bent portions 3 and 4 on the same plate surface 2c side. Contact portions 5 and 6 are provided at the end portions of the elastic bent portions 3 and 4, respectively.

  The overall width of one elastic bent portion 3 of the two elastic bent portions is narrower than the entire width of the central flat plate portion 2 as shown in the developed view of FIG. 6, and the one elastic bent portion 3 is the central flat plate. The end portion of the portion 2 extends from the central portion in the width direction, is bent at the base portion, and is folded on the plate surface of the central flat plate portion 2. The tip of the one elastic bent portion 3 is bent in a direction away from the central flat plate portion 2 by its width to form one contact portion 5. One contact portion 5 may have a structure in which a line contact is made with the other party or a point contact structure.

  The other elastic bent portion 4 is an elastic metal left on both sides of the window portion by punching and forming the window portion 7 in a rectangular elastic metal plate arranged to extend the other end side of the central plane plate portion 2. The plate portion has a plurality of elastic bent portions 4, 4, and the total width of the other elastic bent portions 4, 4 is the same as the total width of the central flat plate portion 2.

  Further, the elastic metal plate portion left on the end side opposite to the central flat plate portion 2 of the window portion 7 is used as the other contact portion 6 having a flat plate shape, and the other elastic bent portions 4, 4 are used. The center flat plate portion 2 is folded back in the upper direction so as to be arranged substantially parallel to the central flat plate portion 2. As a result, the other contact portion 6 is formed integrally with all the elastic bent portions 4 and 4 and is formed to have the same width as the central flat plate portion 2.

  Moreover, the window part 7 is shape | molded by the width | variety which can be freely operated by inserting one elastic bending part 3. The other elastic bent portion 4 is formed by passing one elastic bent portion 3 through the window portion 7 between the elastic bent portions 4 and 4 and being bent at the base of the other elastic bent portion 4 so as to be a central plane plate portion. 2 is folded on the plate surface. As a result, the one and the other elastic bent portions 3 and 4 are arranged so as to intersect the X shape when viewed from the front as shown in FIG. The other contact portion 6 having a flat plate shape is arranged.

  When the earth terminal 1 having such a structure is used in an electronic device, for example, as shown in FIG. 8, the contact plate surface 2a of the central flat plate portion 2 is formed on the heat source of the electronic device or the heat generating portion 10 that receives heat from the heat source. The surface is brought into surface contact and fixed thereto by soldering, screwing, or the like, or only surface contact is made, and one contact portion 5 and the other contact portion 6 on the opposite side are connected to a heat radiating portion 11 such as a chassis of an electronic device. Are brought into contact with each other by utilizing the elasticity of the elastic bent portions 3 and 4. At this time, one contact part 5 is in line or point contact with the other party, and the other contact part 6 is in surface contact with the other party with the same width as the entire width of the central flat plate part 2, and the contact area with the other party is remarkably increased. Can be significantly improved.

  In the above-described embodiment, one elastic bent portion 3 is one and the other elastic bent portion 4 is two on both sides of one window portion 7, but the window portion 7 is not shown in the figure. Three or more other elastic bent portions may be provided by forming a plurality of elastic bent portions, and the number of one elastic bent portion corresponding to the number of window portions may be provided.

It is a top view of an example earth terminal in the best mode for carrying out the present invention. It is a front view of the earth terminal. It is a bottom view of the earth terminal. It is a left view of the ground terminal. It is a right view of the same earth terminal. It is a perspective view of the earth terminal. It is an expanded view of the earth terminal. It is sectional drawing of the use condition of the earth terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground terminal 2 Center plane board part 3, 4 Elastic bending part, Contact part 7 Window part 10 Heat generation part 11 Heat radiation part

Claims (3)

The central portion of the elastic metal plate is a central flat plate portion, and both sides of the central flat plate portion are folded back to the same plate surface side as elastic bent portions, and contact portions are respectively provided at the end portions of the respective elastic bent portions. In the earth terminal where
The overall width of one of the elastic bent portions is narrower than the central flat plate portion,
The other elastic bending portion of the two elastic bending portions forms the elastic metal plate left on both sides of the window portion by forming a window portion on the elastic metal plate, and becomes the other elastic bending portion, The elastic metal plate left on the end of the window portion opposite to the central flat plate portion at the tip of the elastic bent portion is a flat plate-like contact portion integrated with the other elastic bent portion. None,
An earth terminal characterized in that both elastic bent portions are folded on the plate surface of the central flat plate portion through the one elastic bent portion in a window portion between the other elastic bent portions.   The other one end of the central flat plate portion is extended from the center in the width direction on one end side of the central flat plate portion. The ground terminal according to claim 1, wherein the other elastic bent portion is extended to both ends in the width direction of the central plane plate portion by positioning the window portion at a center portion in the width direction of the center flat plate portion. An electronic device comprising the ground terminal according to claim 1.

Images