124results about How to "Prevent bad connection" patented technology

Refrigerator including a body forming an outer appearance of the refrigerator, a terminal detachably mounted on the body for controlling the refrigerator, a power supply device at one side of the body, for receiving power from an outside of the refrigerator, converting to a predetermined charge power, and supplying to the terminal, and an electric connection part connected between the power supply device and the terminal.

An optical fiber connecting tool is provided in which an optical fiber connecting tool 5 is used which has a ferule 7, a connecting structure 10 which has two clamping sections 18, 19 which are disposed in a ferule 7. A pre-installed optical fiber 6 and a newly installed optical fiber 17 are clamped in a butt-connected condition by a clamping section 18. The newly installed optical fiber 17 is clamped by the other clamping section 19. An optical fiber connecting tool 1 is provided which has an open / close member 2 which is detachably disposed on the clamping section 18 and another open / close member 3 which is detachably disposed on the another clamping section 19 such that the both of the open / close members 2, 3 can be operated independently. Also, a method for connecting optical fibers according to the present invention prevents an increase in a loss due to a bent optical fiber and a damage in the optical fiber by extracting the open / close member 2 from the clamping section 18 before extracting the open / close member 3 from the another clamping section and dispose a deformation which is generated on the tip section of the optical fiber when the optical fiber connecting part is attached on the tip section of the optical fiber according to steps for performing an extracting operation for the open / close member e from the another clamping section. Here, for the optical fiber connecting part, for example, various members can be adapted such as a member which does not have the above explained ferule, and a member which realize a connection and a clamping operation for the optical fibers by a structure of only the above explained connecting structure.

Provided is a multilayer printed wiring board having a terminal portion of high quality. This multilayer printed wiring board 1 has a flexible portion 2 having flexibility, the flexible portion 2 that can be bent when used, a rigid portion 3 formed continuously with the flexible portion, the rigid portion 3 having greater rigidity than the flexible portion 2, and a terminal portion 4 formed continuously with the flexible portion 2 at an end portion of the flexible portion. The rigid portion 3 includes a rigid layer 6 having insulation properties. The terminal portion 4 includes an insulating layer 8 formed of the same material as that for the rigid layer 6, the insulating layer 8 having a conductive layer 9 formed on the surface thereof, the conductive layer 9 having a predetermined terminal pattern and serving as a connecting terminal.

Conductive ball part (1) is produced by applying a coating layer composed of Cu layer (3) and layer of Sn-5.5Ag alloy of noneutectic composition (2) onto approximately spherical core (4) constituted of a nonmetallic material. The conductive ball part (1) is arranged through a flux on a land of electronic part, and reflow thereof is carried out at heating temperature whose peak temperature reaches 250 to 260 DEG C. The Sn-5.5Ag alloy of noneutectic composition is conditioned into a state in which solid phase portions and liquid crystal portions coexist to thereby attain relative reduction of fluidity with the result that an SnCu layer formed on the surface of the Cu layer (3) is fixed on the land without exposure. An electrode can be formed without exposure of the SnCu layer of relatively poor solder wettability. Joint zone of excellent electrical conduction and mechanical strength can be formed between the electronic part and a circuit board.