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  Method of manufacturing annular oblique light illumination apparatus and flexible wiring substrateRelated Patent Categories: Electrical Connectors, With Vehicle Structure, Connection To Towed VehicleThe Patent Description & Claims data below is from USPTO Patent Application 20050272277. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This application is a divisional of pending U.S. patent application Ser. No. 10/806,284, filed on Mar. 23, 2004, entitled "Method of Annular Oblique Light Illumination Apparatus and Flexible Wiring Substrate" in the names of Makoto Toyota et al., the disclosure of which is expressly incorporated by reference herein in its entirety. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention concerns a method of manufacturing an annular oblique light illumination apparatus having a frustconical inner circumferential surface as a light emitting device arranging surface, and a flexible wiring substrate used therefor. [0004] 2. Statement of Related Art [0005] LED annular oblique light illumination apparatus are used, for example, in product inspection. In an existent LED annular oblique light illumination apparatus, as shown in FIG. 2, a light emitting device arranging surface 3 having a frustconical surface is formed inside an annular frame F, and a wiring substrate 41 having LED 9, 9, - - - , as light emitting device, mounted thereon is attached to the arranging surface 4. [0006] In a case of manufacturing an annular oblique light illumination apparatus 2 for a substrate, as shown in FIG. 9, an arcuate zonal flexible wiring substrate 41 conforming an arcuate zonal wiring pattern 42 is supported in a planar state, electrodes of LED 9, 9, - - - are inserted into through holes 11 therein and soldered, and then ends of the arcuate zonal flexible wiring substrate 41 are joined to each other to form a frustconical shape, which was then fixed to the arranging surface 3 (refer to Japanese Patent No. 2975893). [0007] According to the constitution described above, since all LED 9, 9, - - - can be soldered at the same time by a flow soldering apparatus upon soldering while supporting the wiring substrate 41 in the planer state, this can save troublesome operation of soldering individual LED 9, 9, - - - . [0008] However, for reliably supporting the arcuate zonal wiring substrate 41 in the planer state, it requires a special jig used exclusively therefor. In addition, since the arcuate zonal shape of the wiring pattern 42 is different depending on the diameter, width, and slanting of the arranging surface 3, jigs of shapes different on every arcuate zonal shapes have to be provided. [0009] Further, upon automatic feeding of them to a flow soldering apparatus while fixing them on a conveyer or the like, since special jigs are necessary by the number of about several tens on every kinds of arcuate shapes in view of the production efficiency, a number of jigs have to be provided as a whole. [0010] Further, in a case where operation of conducting soldering for a wiring substrate 41 of a certain shape has been completed and then soldering for another wiring substrate 41 of a different shape is started, it needs troublesome operation that all the jigs have to be exchanged. [0011] Further, since the shape of the wiring substrate 41 is not symmetrical, the shape of the jig is also complicated. When the wiring substrate 41 is supported on a square frame it is slackened or distorted at not retained end edges by the weight of the LED 9,9 - - - , to result in a problem of soldering failure. [0012] In view of the above, it is intended in the present invention to enable reliable support for a wiring substrate without using a special jig conforming the arcuate shape of a wiring pattern to which LEDs are mounted, thereby improving the operation efficiency of soldering, as well as saving the troublesome exchange and handling of jigs and, further, avoid occurrence of product deficiency even in a case of applying soldering by a flow soldering apparatus. SUMMARY OF THE INVENTION [0013] The foregoing subject can be attained in accordance with the present invention by a method of manufacturing an annular oblique light illumination apparatus having a frustconical inner circumferential surface as a light emitting device arranging surface, which comprises; [0014] using a flexible wiring substrate in which a plurality of arcuate zonal wiring pattern parts for mounting light emitting devices each in the form of a developed frustconical shape are serpiginously formed continuously to a base film of a predetermined shape, inserting electrodes of light emitting devices into the arcuate zonal wiring pattern parts and soldering them then, cutting out the arcuate zonal wiring patterns to form a light emitting device arrays, and fixing each light emitting device array to the arranging surface. [0015] According to the present invention, since a flexible wiring substrate in which arcuate zonal wiring patterns are formed continuously on a base film of a determined shape is normalized in accordance with the shape of a jig irrespective of the arcuate shape of the wiring pattern, there is no requirement for providing plural kinds of jigs. [0016] In this case, when the base film is formed, for example, in a square shape, a general purpose square frame can be used as the jig and the manufacturing cost for the jig can be decreased. [0017] Further, since the base film can be supported simply by merely stretching and setting the film and since the entire circumference thereof can be supported reliably, soldering failure is scarcely caused by the slackening or distortion of the wiring substrate. [0018] Further, since a plurality of arcuate zonal wiring patterns for mounting light emitting devices are formed on one base film, the production efficiency is improved. [0019] Further, since the wiring patterns are continued with each other directly or by way of a connection wiring pattern to form a serpiginous stripe wiring pattern, a circuit can be formed from one end to the other end thereof, and LED mounted to each of the patterns can be lit at the instance soldering is completed thereby enabling product inspection all at once. DESCRIPTION OF THE ACCOMPANYING DRAWINGS [0020] FIG. 1 is an explanatory view showing a flexible wiring substrate according to the present invention; [0021] FIG. 2 is an explanatory view showing an annular oblique light illumination apparatus, Continue reading... 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