Abstract: A cord winder includes a base, a rotating disc, a spiral spring, a cord, a cord positioning element, a push button, and a top cover. When a first end part of the cord is pulled, the rotating disc and the cord positioning element are rotated in a first direction, and two protruding blocks of the push button are moved along an inner surface of the cord positioning element. When the first end part of the cord is no longer pulled, the two protruding blocks are respectively contacted with two notches of the inner surface of the cord positioning element. Consequently, the rotating disc and the cord positioning element are not rotated. When the push button is pressed down, the rotating disc and the cord positioning element are rotated in a second direction in response to a restoring force of the spiral spring. Consequently, the cord is retracted back.

Abstract: A keyboard device includes an upper cover, an elastic key plate, a switch module, and a base plate. The upper cover includes plural openings. The elastic key plate is disposed on an inner surface of the upper cover. The elastic key plate includes plural elastic keys. The plural elastic keys are inserted into the plural openings of the upper cover and exposed outside the upper cover. The elastic key plate is integrally formed with the upper cover. There are no gaps between the plural elastic keys and the openings of the upper cover. Since dust or foreign liquid cannot be introduced into the inner portion of the keyboard device, the inner circuitries of the keyboard device will not be damaged by the dust or the foreign liquid.

Abstract: A cord winder includes a base, a rotating disc, a spiral spring, a cord, a cord positioning element, a push button, and a top cover. When a first end part of the cord is pulled, the rotating disc and the cord positioning element are rotated in a first direction, and two protruding blocks of the push button are moved along an inner surface of the cord positioning element. When the first end part of the cord is no longer pulled, the two protruding blocks are respectively contacted with two notches of the inner surface of the cord positioning element. Consequently, the rotating disc and the cord positioning element are not rotated. When the push button is pressed down, the rotating disc and the cord positioning element are rotated in a second direction in response to a restoring force of the spiral spring. Consequently, the cord is retracted back.

Abstract: A cursor control device includes a main body, a primary circuit board, a conducting member, a chargeable battery, and a wireless signal receiver. The conducting member is connected with the primary circuit board. The main body includes a charging slot. A first bulge is protruded from an inner periphery of the charging slot. A recess is formed in an outer shell of the wireless signal receiver. The wireless signal receiver has a charging plate member exposed to the outer shell. When the wireless signal receiver is transferred through the charging slot, the first bulge is accommodated within the recess of the outer shell of the wireless signal receiver, and the charging plate member is contacted with the conducting member. When the wireless signal receiver is connected with a computer, the electric power from the computer is transmitted to the chargeable battery.

Abstract: The present invention discloses a wheel mouse including a wheel module, a trigger switch and a switch module. The trigger switch is located under the wheel module, which is capable of being pressed to generate a wheel button signal, so as to enable the wheel mouse to execute a wheel button command. The switch module is capable of controlling the wheel module to be operated in a first stage mode or a second stage mode. As a result, the wheel mouse not only has a switch function for the stage modes but also can generate the wheel button signal by pressing the wheel module.