Assembly having a structure for clamping the harnesses and image-forming machine

Abstract

A structure for clamping the harnesses, enabling the harnesses attached to the substrate or the harnesses around the substrate to be clamped by using parts that have been usually used. An assembly having the structure for clamping the harnesses comprises a circuit board on which parts are mounted on one side thereof; a shielding plate arranged on the other surface side thereof; and an insulating sheet arranged between the other surface of the circuit board and the shielding plate; wherein the harnesses are extending around the circuit board. The insulating sheet forms a clamp protruding outward beyond the circuit board, and the harnesses are engaged with a protruding piece.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a printer incorporating a circuit board employing an assembly having a structure for clamping the harnesses according to an embodiment of the invention;

FIG. 2 is a perspective view of a circuit board assembly constituted by the circuit board arranged in the printer of FIG. 1, an insulating sheet and a shielding plate as viewed from the inside of the printer;

FIG. 3 is a perspective view of the circuit board assembly arranged in FIG. 1 as viewed from the outside of the printer;

FIG. 4 is a disassembled perspective view of the circuit board assembly as viewed from the direction of FIG. 2;

FIG. 5 is a disassembled perspective view of the circuit board assembly as viewed from the direction of FIG. 3;

FIG. 6 is a sectional view in the direction of the line X-X in FIG. 3; and

FIG. 7 illustrates modified examples of a protruding piece of the insulating sheet provided in the circuit board assembly, wherein FIG. 7A is a plan view omitting the notch in the protruding piece, FIG. 7B is a plan view in a state where the width of notch in the protruding piece is increased on the side of inserting the harnesses, and FIG. 7C is a perspective view of the protruding piece arranged at a position higher by a step than the surface of the insulating sheet.

Claims

1. An assembly having a structure for clamping the harnesses extending around a circuit board comprising: a circuit board on which electronic parts are mounted;a circuit board-mounting plate arranged maintaining a gap relative to said circuit board; andan insulating sheet arranged between said circuit board and said circuit board-mounting plate;wherein said insulating sheet forms a protruding portion protruding outwards beyond the circuit board, a harness-engaging portion is formed in said protruding portion, and said harnesses are engaged with said harness-engaging portion.

2. The assembly having the structure for clamping the harnesses according to claim 1, wherein the engaging portion is formed by a hole formed in the protruding portion of said insulating sheet and by a notch formed between the hole and an edge portion of said protruding portion.

3. The assembly having the structure for clamping the harnesses according to claim 1, wherein folded portions are formed at the edges of said circuit board-mounting plate, and slit-like holding portions are formed in said folded portions to hold the protruding portions of said insulating sheet.

4. The assembly having the structure for clamping the harnesses according to claim 2, wherein the direction of said notch is at right angles with the direction in which said harnesses extend.

5. The assembly having the structure for clamping the harnesses according to claim 1, wherein a material of the insulating sheet is polyethylene terephthalate, fluoroplastic, polyvinyl chloride resin and rubber.

6. An image-forming machine incorporating an assembly having a structure for clamping the harnesses to connect the members in the machine body, wherein the assembly having the structure for clamping the harnesses is constituted by the assembly having the structure for camping the harnesses of any one of claims 1.