Abstract: Adjacent a side wall of a casing, a strap supporting post 49a is formed integrally with and extends form the inner surface of the top panel 41a of the upper casing half 41. The strap supporting post 49a has a screw bore 51 extending from the end face of the projecting end thereof and therethrough deep into the top panel 41a. A reentrant cavity 56 is formed in one side wall of the casing such that the post 49a is positioned generally in the center of the cavity. A metal-made screw 54 is passed through a through-bore in the lower casing half 42 and threaded into the screw bore to fasten the upper casing half 41 and the lower casing half 42 together. A strap is hooked on the post 49a by being inserted into the cavity from one side of the post 49a to wrap around the post and then being pulled out of the cavity from the opposite side of the post.

Abstract: A dome portion of a contact piece has a plurality of circumferentially-spaced-apart marginal portions and a plurality of dome extensions provided between the marginal portions.

Abstract: Adjacent a side wall of a casing, a strap supporting post 49a is formed integrally with and extends form the inner surface of the top panel 41a of the upper casing half 41. The strap supporting post 49a has a screw bore 51 extending from the end face of the projecting end thereof and therethrough deep into the top panel 41a. A reentrant cavity 56 is formed in one side wall of the casing such that the post 49a is positioned generally in the center of the cavity. A metal-made screw 54 is passed through a through-bore in the lower casing half 42 and threaded into the screw bore to fasten the upper casing half 41 and the lower casing half 42 together. A strap is hooked on the post 49a by being inserted into the cavity from one side of the post 49a to wrap around the post and then being pulled out of the cavity from the opposite side of the post.

Abstract: A multi-directional key switch assembly comprises first stage switches and second stage switches of different kinds disposed alternately arrayed at 45.degree. on a common circle at angular intervals on a printed-circuit board, a truncated semi-spherical shell shaped rolling member disposed on the board in overlying relation to thee switches, slide members disposed on the undersurface of the semi-spherical shell shaped rolling member in opposition to the corresponding first stage switches, and actuating means disposed in correspondence with the second stage switches. A key top is mounted on the rolling member and has an integral operating stick extending from the undersurface thereof. The operating stick is inserted in a receiving bore formed through the rolling member from the upper surface to the undersurface thereof along the central axis thereof.

Abstract: A keyboard in which raised portions are embossed on a rubber sheet in correspondence to the respective switches of a membrane switch so that the raised portions may be pressed down to actuate the switches. A housing made of highly rigid synthetic resin is provided which has openings formed therethrough. A key top is disposed within each of the openings and formed integrally with the housing by means of at least two hinges. Each of the widthwise delimiting regions formed integrally with the housing between each widthwise adjacent openings has notches cut in from adjacent openings in depthwise staggered position. Each of the key tops has engagement tabs extending oppositely outward from two opposed side edges thereof adjoining the side edge where the hinges are formed and entering into the notches. A face panel having key top openings formed therethrough and arrayed in correspondence to the key tops is attached to the upper surface of the housing.