Abstract: A tin-plated surface 7 is formed by hot-dip coating a solder containing a lead-free tin as the main component on an electrode 6 of a board 4 with which a connector terminal 1 comes in contact.

Abstract: A tin-plated surface 7 is formed by hot-dip coating a solder containing a lead-free tin as the main component on an electrode 6 of a board 4 with which a connector terminal 1 comes in contact.

Abstract: Providing a high-voltage-side terminal with means for preventing a core inserted into a central hole of a bobbin from getting out of position securely fixes the core to the predetermined position, at the time a transformer which is a part of an ignitor is assembled, during the work proceeds from the inserting step of the core to the next step. Thus, at the time the ignitor-integral type bulb socket is assembled, the core hardly moves out of the predetermined position and there is a less possibility that the core gets out of position. Accordingly, this does not require so high machining accuracy of both members and reduces the cost for machining the product as well as for inspecting the dimension control or the like.

Abstract: A transformer for an igniter, in which a primary coil and a secondary coil are wound around a bobbin, is composed of a plurality of disk-shaped partition walls disposed on the bobbin, around which the primary coil and the secondary coil are wound, so as to protrude from all circumferential surface of the bobbin in a radial direction of the bobbin and to form a plurality of coil winding grooves in layers, and a plurality of cut-out portions functioning as a coil taking-in portion and a plurality of coil delivery portions of the disk-shaped partition walls. Therefore, the stabilization of a winding operation is obtained, the loss of coils due to the bending of the coils can be prevented, films of coils can be protected, a small-sized transformer for an igniter can be obtained, and an automatic winding operation can be performed.

Abstract: Providing a high-voltage-side terminal with means for preventing a core inserted into a central hole of a bobbin from getting out of position securely fixes the core to the predetermined position, at the time a transformer which is a part of an ignitor is assembled, during the work proceeds from the inserting step of the core to the next step. Thus, at the time the ignitor-integral type bulb socket is assembled, the core hardly moves out of the predetermined position and there is a less possibility that the core gets out of position. Accordingly, this does not require so high machining accuracy of both members and reduces the cost for machining the product as well as for inspecting the dimension control or the like.

Abstract: A transformer for an igniter, in which a primary coil and a secondary coil are wound around a bobbin, is composed of a plurality of disk-shaped partition walls disposed on the bobbin, around which the primary coil and the secondary coil are wound, so as to protrude from all circumferential surface of the bobbin in a radial direction of the bobbin and to form a plurality of coil winding grooves in layers, and a plurality of cut-out portions functioning as a coil taking-in portion and a plurality of coil delivery portions of the disk-shaped partition walls. Therefore, the stabilization of a winding operation is obtained, the loss of coils due to the bending of the coils can be prevented, films of coils can be protected, a small-sized transformer for an igniter can be obtained, and an automatic winding operation can be performed.