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Provided is a sliding power supply device which can reduce entire length of a case extendably housing a wiring harness, for a large slide stroke of a sliding seat and such. The sliding power supply device includes a long case extendably housing a wiring harness, a slider arranged slidable in a longi

Provided is a sliding power supply device which can reduce entire length of a case extendably housing a wiring harness, for a large slide stroke of a sliding seat and such. The sliding power supply device includes a long case extendably housing a wiring harness, a slider arranged slidable in a longitudinal direction of the case and arranged to lead out the wiring harness to outside of the case, and an extra length absorption portion arranged to support a wiring harness portion lead outside of the case such that the wiring harness portion is lead out at location further away from a movement end of the slider in the longitudinal direction of the case. The extra length absorption portion is a subcase having at least a bottom plate portion. Both ends of the wiring harness portion in a movement direction of the slider are positioned at the same height.

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1. A sliding power supply device, comprising: a long case housing a wiring harness in an extendable and contractable fashion;a slider arranged slidable in a longitudinal direction of the case and arranged to lead out the wiring harness to outside of the case; andan extra length absorption portion di

1. A sliding power supply device, comprising: a long case housing a wiring harness in an extendable and contractable fashion;a slider arranged slidable in a longitudinal direction of the case and arranged to lead out the wiring harness to outside of the case; andan extra length absorption portion disposed above the case so as to move forward and backward and arranged to support a wiring harness portion lead outside of the case,wherein the slider is engaged to the extra length absorption portion so as to be slidable in the longitudinal direction of the case with respect to the extra length absorption portion, andwherein total amount of stroke of the extra length absorption portion is greater than total amount of stroke of the slider. 2. The sliding power supply device according to claim 1, wherein the extra length absorption portion is a subcase having at least a bottom plate portion,andwherein the wiring harness portion lead outside of the case is disposed in the subcase in an extendable and contractable fashion. 3. The sliding power supply device according to claim 1, wherein both ends of the wiring harness portion in a movement direction of the slider are positioned at the same height, andwherein a harness extra length is absorbed by an extending and contracting action of the wiring harness portion. 4. The sliding power supply device according to claim 2, wherein both ends of the wiring harness portion in a movement direction of the slider are positioned at the same height, andwherein a harness extra length is absorbed by an extending and contracting action of the wiring harness portion.