Switch

Abstract

A switch (1) includes an insulative case (2), fixed electrodes (3,4) and a movable electrode (5). The case includes a first surface (2c) configured to contact with a circuit board and a second surface (2f) configured to oppose to the circuit board via a gap. The fixed electrodes are accommodated in the case. The movable electrode is accommodated in the case, and is movable between a first position for placing the fixed electrodes in a conductive state and a second position for placing the fixed electrodes in a nonconductive state. Each of the fixed electrodes includes a contact terminal (3a,4a) which contacts with the movable electrode and an external connecting terminal (3b,4b) which is exposed on the second surface and is soldered to a land of a wiring terminal provided on the circuit board. The external connecting terminal (3,4) includes a first portion (3a,3b) opposes to the land and a second portion (3d,4d) connected to the first portion and having an area larger than an area of the first portion.

Description

technical field [0001] The present invention relates to a terminal structure provided for soldering when a switch used in various electronic devices is mounted on a circuit board, and particularly relates to a terminal structure of a push switch. Background technique [0002] A push switch used in various small electronic devices such as a mobile phone is disclosed in Patent Document 1, for example. [0003] Figure 13 Such a conventional push switch is shown. The push switch 100 includes a switch case 111 , a first fixed electrode 112 , a pair of second fixed electrodes 113 , a movable electrode 114 , and a cover plate 11 . [0004] The switch case 111 has a box shape with an open upper surface, and is made of insulating resin. The first fixed electrode 112 is fixed at the center of the inner bottom surface of the opening. A pair of second fixed electrodes 113 are fixed at positions facing each other across the first fixed electrodes 112 . [0005] The movable electrode...

AI Technical Summary

Problems solved by technology

Since it is necessary to extend the pad 116 to the outside of the outer edge of the push switch 100 for the above reasons, it is unavoidable that the mounting area becomes larger than the area of ​​the push switch 100 itself.

This is the main factor hindering the miniaturization of equipment required in recent years

[0015] In addition, if Figure 14 As shown, in order to form the first fixed electrode 112, the second fixed electrode 113, and the terminals 112A and 113A, after punching the flat conductive member into a predetermined outer contour shape, it is necessary to bend the terminals 112A and 113A upward. , which becomes the main reason for the increase in manufacturing cost due to the complexity of the forming die

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