A waterproof partition adapted to a button includes a waterproof film and a waterproof foam formed on a surface of the waterproof film and covering a periphery of the waterproof film. The waterproof foam is formed with an opening for providing a moving passage for pressing the button. The waterproof film has elasticity, and the waterproof film is annular.

A key structure comprises at least one key switch mounted on a surface of a substrate disposed inside a case of an electronic apparatus; at least one key top inserted in a key through-hole bored in the case, the at least one key top being designed to press the at least one key switch upon undergoing a displacement from outside the case toward inside the case; and a key stopper abutting, inside the case, the at least one key top that has undergone the displacement, to restrict a further outward-to-inward displacement of the at least one key top.

An example portable electronic device includes a front glass cover; a rear cover; a bezel surrounding a space defined by the front cover and the rear cover, the bezel including a portion including an opening; a display device built in the space; and a plate including a plane parallel to the front cover within the space. The example electronic device includes a key movably inserted in the opening; a support structure mounted on the plate or a portion of the bezel and including a hole through which the key passes; a dome button mounted on the support structure and arranged to face the first surface of the key and the hole so that the key can be pressed; and a waterproof structure including a flexible material.

A push switch which can have a small separation distance from a side surface of a mounting board, when it is mounted on the mounting board through a step, is disclosed. The push switch includes a substrate having a first surface on which a first fixed contact point and a second fixed contact point surrounding the first fixed contact point are formed, a second surface located opposite to the first surface, a third surface extending from the second surface to a corner in a direction perpendicular to the first surface, and a fourth surface extending from the corner parallel to the first surface, and a conductive movable contact point having a peripheral edge is in contact with the second fixed contact point, and a center contacted by the first fixed contact point when the movable contact point is pressed, and the corner includes a groove recessed with respect to at least one of the third surface and the fourth surface.

A push switch which can have a small separation distance from a side surface of a mounting board, when it is mounted on the mounting board through a step, is disclosed. The push switch includes a substrate having a first surface on which a first fixed contact point and a second fixed contact point surrounding the first fixed contact point are formed, a second surface located opposite to the first surface, a third surface extending from the second surface to a corner in a direction perpendicular to the first surface, and a fourth surface extending from the corner parallel to the first surface, and a conductive movable contact point having a peripheral edge is in contact with the second fixed contact point, and a center contacted by the first fixed contact point when the movable contact point is pressed, and the corner includes a groove recessed with respect to at least one of the third surface and the fourth surface.

A side key structure of an electronic device includes a housing, a flexible circuit board, and a side key. The housing defines a receiving groove. The flexible circuit board includes a key switch. The side key includes a main key body, a fastener, and a pressing portion. The flexible circuit board is mounted on a sidewall of the receiving groove. The pressing portion and the fastener are arranged on a same side of the main key body. The main key body is partially received in the receiving groove. The fastener and the pressing portion pass through a second sidewall of the receiving groove. The fastener is mounted within the receiving groove. The main key body is configured to be pressed to cause the pressing portion to press the key switch to activate the key switch.

A waterproof button structure includes a housing, a cover plate, and a waterproof partition. The housing includes a button switch. The cover plate covers the button switch. The cover plate includes a pressable button. The button switch is in one-to-one correspondence with the button. The waterproof partition is located between the housing and the cover plate. A waterproof film of the waterproof partition is adjacent to the cover plate. A waterproof foam of the waterproof partition is adjacent to the housing. When the button is pressed, the button is abutted by the waterproof film, and the button switch is activated.

Various embodiments relating to an electronic device including a key module are disclosed, and according to one embodiment, a portable electronic device comprises: a front glass cover defining the front surface of the electronic device; a rear cover defining the rear surface of the electronic device; a bezel surrounding a space defined by the front cover and the rear cover, the bezel being integrally formed with or separately formed from the rear cover, the bezel including a portion including an opening; a display device built in the space and including a screen area exposed through the front cover; and a plate including a plane parallel to the front cover within the space, wherein the opening penetrates from the outside of the bezel toward the space in a first direction. The electronic device comprises: a key having a size and a shape that can pass through the opening, the key being movably inserted in the opening and including a first surface facing the first direction; a support structure mounted on the plate or a portion of the bezel and including a hole through which the key passes; a dome button mounted on the support structure and arranged to face the first surface of the key and the hole so that the key can be pressed when moving in the first direction; and a waterproof structure including a flexible material. The waterproof structure may comprise: a first portion located between the first surface of the key and the dome button; and a second portion extending from the first portion and inserted between the support structure and the bezel, the second portion sealing a space between the support structure and the bezel so as to waterproof the space. Other various embodiments are also possible.

A button restoring mechanism of an electronic device includes a housing, an adjustment button mounted on the housing, a bracket, and an elastic member. One side of the adjustment button protrudes within the housing. The bracket latches with the adjustment button. One end of the elastic member is fixed to one side of the bracket, and a second end of the elastic member abuts against a second side of the bracket. An elastic force of the elastic member drives the second side of the bracket to abut against a switch button within the housing.

A mobile terminal having a terminal main body including a front case forming an internal area including a submergence area into which water is introduced and a waterproof area into which water is blocked from being introduced, and an internal frame; a first unit including a key module mounted in the terminal main body, and generating a control command when a pressing occurs, the key module being positioned in the submergence area and moving due to an external force; a second unit positioned in the waterproof area, and when the pressing occurs, generates a signal; an elastic deformation layer of which a portion is elastically deformed due to movement of the first unit, so the second unit is pressed by the first unit; and a waterproof layer attaching the elastic deformation layer and the front case so partitioning results in the submergence area and the waterproof area.