Wedge base socket attached to SPG substrate

Abstract: An wedge base socket for SPG substrate (4) comprises a terminal (6) having a bulb connection member (6b) and a casing (7) to hold a base (5a) of the bulb (5). The terminal (6) and the case (7) are individually mountable onto the SPG substrate (4). A pair of the terminals are preformed connected by a provisional bridge which decreases process of insertion into substrate.

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a SPG substrate used for a circuit substrate at a place of automobile meter panel rear face or a place where an electric wiring and bulb of a plurality of passages such as rear combination lamp, used for a circuit substrate and it is punched from for example a metal sheet in a convenient form to form a circuit member, and more particularly an wedge base socket or receptacle attached to the SPG substrate. SPG is a code which is used in JIS (Japanese Industrial Standard). A SPG substrate means a a substrate 31 for mounting a circuit member 33 made of galvanized sheet iron. 2. Description of the Prior Art Conventionally, when an wedge base socket 32 is attached to a SPG substrate 31, an existing wedge socket 32 which bayonet engages as shown in Fig. 4., for example is used, and a mounting hole 31a in a convenient shape is provided through the SPG substrate 31, on which a shape corresponding to a circuit member 3 mounted thereon is formed generally in a fan shaped. However, the conventional constitution has a drawback to need a mounting hole 31a at a mounting position since the wedge base socket 32 is existing one and an area at a mounting position which causes the SPG substrate 31 to be larger or to detour the circuit member 33, which cause its form to be complicated. Furthermore, there is a need of a preassembly process for the wedge base socket 32 which overlaps the working hour to complicate the process. These problems should have been resolved. SUMMARY OF THE INVENTION This invention is to provide the wedge base socket attached to the SPG substrate of a circuit substrate with laid circuit member formed of a wire conductive member, as embodied means to solve the conventional problems. The wedge base socket comprises a terminal member having at its one end a circuit connection member formed of a conductive resilient spring member, which is sandwichably mounted to the circuit member, at another end a bulb connection member pressedly inserted against a base member of the wedge base bulb, and a casing comprising an insulation member, to hold the base member of the wedge base bulb, and each of the terminal members and the casing member is mountable onto the SPG substrate individually. Such provision of the wedge base socket for the SPG substrate resolves the prior problems. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS Fig. 1 is a perspective view showing one embodiment of the wedge base socket to the SPG substrate relating to the invention. Fig. 2 is a cross section along line II-II in Fig. 1. Fig. 3 is a perspective view showing a major portion of the another embodiment of this invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS Now, this invention will be hereinafter discussed in detail along one embodiment shown in the accompanying drawing. Figs. 1 and 2 show an wedge base socket (hereinafter socket or receptacle 1) which is mounted onto a SPG substrate 4 comprising a substrate 2 and a circuit member 3 and the socket 1 is a similar example to conventional one such that a base 5a of the wedge base bulb 5 (hereinafter bulb 5) is mounted, but the socket 1 is only for the SPG substrate 4 along this invention. The socket 1 will be hereinafter discussed in detail and the socket 1 comprises a terminal member 6 and a casing 7, and the terminal 6 is formed in generally linear from a resilient metal member such as phosophorous copper plate or brass plate for a spring, and its one end is formed in a shape to sandwich a receiving terminal of the electric receptacle, to form the circuit connection member 6a, and its another end is folded back to form a compressive spring to form a bulb connecting member 6b. At further convenient portion is an opening 6c to receive a pin 2a provided on the substrate 2 of the SPG substrate 4 and is heatably wedged so that it is mated solely by the terminal member 6. To the contrast, the casing member 7 is formed form an insulative member such as a synthetic resin on which a clip member 7a to hold the base member 5a of the bulb 5 is provided and a nail member 7b matable to a guide member 2b provided on the substrate, are provided, similar to the terminal 6 and it is matable onto the substrate 2 solely by the casing 7. To this end, the pin 2a and the guide 2b are conveniently provided in positions where each of the terminal 6 and the case 7 is respectively mounted where the bulb is attached. When the socket 1 of said constitution is assembled onto the substrate 2, the terminal 6 is at first inserted into the substrate 2, then the circuit member 3 is inserted into the substrate 2 in a similar constitution, so that a tip end 3a of the circuit member 3 in generally L-shape is sandwiched by the circuit connection member 6a thereby to electrically switch on and off the circuit member 3 and the terminal member 6 and simultaneously at a given position. Then, after fixing the circuit member 3 and terminal 6 on the substrate by convenient means such as heat mating, the casing 7 is inserted into a given position of the substrate 2, thereby completing an assembly of the socket 1 and it is assembled simultaneously as an assembly process of the SPG substrate 4. Therefore, a late assembly process of the socket 1 is eliminated and a mounting hold for its assembly is also eliminated. Fig. 3 shows a major portion of another embodiment of this invention, wherein the terminal 6 is preformed at a state that a pair of left and right at a mounting state is connected by a provisional bridge 6d. This arrangement reduces a process in a half when the terminal 6 is inserted into the substrate 2. In said SPG substrate 4, it is normal such that a constitutional design similar to the provisional bridge 6d is provided at a side of said circuit member 3 so as to reduce working hour. Therefore, all including the provisional bridge 6d is cut off after assembly. As discussed in the above, along this invention, the wedge base socket comprises the terminal member of conductive resilient member having at its one end the circuit connection member sandwiched onto said circuit member and at another end the bulb connection member pressed against the base member of the wedge base bulb, and the case of the insulative member to hold the babe member of the wedge base bulb, whereby the terminal member and the casing are individually mountable onto said SPG substrate. To this end, first a mounting hole for the wedge base socket is eliminated from the SPG substrate which causes the design to be compact and simple for wiring, and secondly the wedge base socket is simultaneously assembled to cause the production line to be simple, and production cost of this kind of the SPG substrate is reduced.

Claims: An wedge base socket mounted onto a SPG substrate (4) with a circuit substrate (2) with laid down circuit member (3) formed of a linear conductive member comprising: a terminal member (6) having a circuit connection member (6a) of conductive resilient material sandwiching said circuit member (3) at its one end and a bulb connection member (6b) pressing against a base member (5a) of a wedge base bulb (5) at another end; and a casing member (7a) of insulative material to hold the base (5a) of the wedge base bulb (5), said terminal member (6) and casing (7) individually being mountable and fixable on said SPG substrate (4), said casing (7) being fixed by caught with one set of guide (2b). An wedge base socket for SPG substrate (4) according to claim 1 wherein said terminal (6) in pair is preformed to be adhered onto a provisional mounting bridge (6d).

Inventors: HIROTO ANZAI, HIROTO, ANZAI
Applicants: STANLEY ELECTRIC CO LTD, STANLEY ELECTRIC CO., LTD.
Application year: 1990
Main classification: F21V19
IPC codes: H01R33, F21V19, H01R12, B42C1