Molded Article Routing Flexible PCB Through Body
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Solution Overview
Problem
The existing component modules with integrally molded touch sensors and resin portions face handling difficulties due to protruding flexible printed wiring boards, which obstruct internal connections and require additional clearance, making it challenging to connect external terminals effectively.
Innovation Solution
A molded article configuration featuring a circuit film with an insulating film and electrical circuits, where a flexible printed circuit board or flexible flat cable is integrated with the molded body, allowing the wiring lines to pass through the body and exposing external connection terminals on the opposite surface, eliminating the need for end portion handling and enhancing sealing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible printed wiring board is drawn out from the end portion of the resin portion, then the electrical connection between external devices and the circuit film is achieved, but the handling of the flexible printed wiring board becomes difficult and it protrudes as an obstacle
Solution Approach 1:
The flexible printed wiring board is routed through the thickness direction (z-axis) of the molded body rather than along the surface (x-y plane). The board enters through one main surface, passes through the interior, and exits through the opposite main surface, transforming the routing from a two-dimensional surface path to a three-dimensional through-body path. This eliminates protrusion obstacles and improves handling.
2Reliability
If the flexible printed wiring board is drawn out from the end portion of the resin portion, then the electrical connection is established, but additional clearance is required between the end portion and other portions of the chassis
Solution Approach 1:
The wiring board routing is moved from the horizontal plane to the vertical thickness direction of the molded body. By passing through the interior thickness (z-axis) rather than along the surface, the board no longer requires horizontal clearance space between the end portion and chassis components. This three-dimensional routing eliminates the need for additional clearance area.
3Reliability
If the flexible printed wiring board is drawn out from the end portion of the resin portion, then the external connection terminal can be accessed, but it becomes an obstacle in the internal space of the chassis
Solution Approach 1:
Instead of drawing the flexible printed wiring board outward from the end portion (protruding configuration), the board is routed inward through the molded body and exits through the opposite main surface. This inverts the traditional routing approach, transforming the board from an external protruding obstacle into an internal through-body connection that exits cleanly on the opposite side, eliminating interference with internal space components.
Data Source
AI summary
ObjectThere is provided a molded article or an electrical product in which layout of a member up to an external connection terminal for electrical connection of a circuit film integrally molded with the molded body is easy.Solution meansA molded body 30 includes one main surface 31 with which a circuit film 20 is integrally molded, and another main surface 32 facing the one main surface 31. A flexible printed wiring board 40 includes an internal connection terminal 41 electrically connected to an electrical circuit of the circuit film 20, an external connection terminal 42 exposed outside from the other main surface 32 of the molded body 30, and a flexible wiring line 43 connected to the inner connection terminal 41 and the external connection terminal 42, passing through an inside of the molded body 30, and extending so as to reach the other main surface 32.