# US 8,570,352 B2 · Suppressing unstable electrical coupling between a bottom plate and a cable by providing a recess on the bottom plate for attachment of the cable

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- Number: US 8,570,352 B2
- Document ID: US8570352B2
- Status: Granted
- Kind: B2
- Application number: 13/430,788
- Filed: 2012-03-27
- Published: 2012-10-04
- Granted: 2013-10-29
- Earliest claimed: 2011-03-30
- Assignees: Kyocera Mita Corporation
- Applicants: Hideto Miyanagi; Akizou Ohtani
- Inventors: Hideto Miyanagi; Akizou Ohtani
- Web page: https://patentgrep.com/patent/US8570352B2

## CPC

- G03G 15/60: {Apparatus which relate to the handling of originals (for photographic purposes in general G03B)}
- G03G 21/1652: {Electrical connection means}
- G03G 21/1666: {for the exposure unit}
- H04N 1/00519: {Constructional details not otherwise provided for, e.g. housings, covers}
- H04N 1/0083: {Arrangements for transferring signals between different components of the apparatus, e.g. arrangements of signal lines or cables (for control or supervision between image input and output device H04N1/32)}
- H04N 1/1013: {with sub-scanning by translatory movement of at least a part of the main-scanning components (H04N1/107 takes precedence)}
- H04N 2201/0094: Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An optical reading device includes a housing, a document platen member, a scanning unit, a cable and an insulating sheet. The cable includes a first end which is fixed to the scanning unit, a second end which is fixed to the bottom plate and an intermediate portion which is held in surface contact with the bottom plate and curved and deformed according to a reciprocal movement of the scanning unit. The insulating sheet is interposed between the bottom plate and the intermediate portion of the cable. The housing includes a recess formed in the bottom plate. The insulating sheet covers an opening of the recess, the upper surface thereof is in contact with the intermediate portion of the cable and a space is formed between the lower surface of the insulating sheet and the bottom surface of the recess.

## Claims

### Claim 1

An optical reading device, comprising:
a housing made of metal, including a bottom plate and having an open upper surface;
a document platen member mounted in an opening of the housing;
a scanning unit in which a light source is mounted and which emits light toward the document platen member while reciprocating along a predetermined scanning direction between the bottom plate and the document platen member;
a cable including a first end which is fixed to the scanning unit, a second end which is fixed to the bottom plate and an intermediate portion which is held in surface contact with the bottom plate and curved according to a reciprocal movement of the scanning unit; and
an insulating sheet interposed between the bottom plate and the intermediate portion of the cable; wherein:
the housing includes a recess formed in the bottom plate and extending in the scanning direction, the recess being a shallow groove having an open upper side, a flat bottom surface and a pair of inclined portions extending obliquely up from side edges of the bottom surface; and
the insulating sheet covers an opening of the recess, the upper surface thereof is in contact with the intermediate portion of the cable and a space is formed between the lower surface of the insulating sheet and the bottom surface of the recess.

### Claim 2 (depends on 1)

An optical reading device according to claim 1, wherein:
the cable is a flat cable and a flat surface thereof is in contact with the insulating sheet; and
the opening of the recess is wider than the width of the flat surface of the flat cable.

### Claim 3 (depends on 1)

An optical reading device according to claim 1, wherein:
a distance between the lower surface of the insulating sheet and the bottom surface of the recess is 1 mm or longer.

### Claim 4 (depends on 1)

An optical reading device according to claim 1, wherein:
a distance between the lower surface of the insulating sheet and the bottom surface of the recess is 1 mm or longer; and
a distance between the side edge of the flat cable and the opening edge of the recess is 1 mm or longer.

### Claim 5 (depends on 1)

An optical reading device according to claim 1, wherein:
the insulating sheet includes a guide portion for guiding the cable.

### Claim 6

An image forming apparatus, comprising:
an optical reading device for optically reading a document image; and
an image forming unit for forming an image on a sheet based on the document image; wherein the optical reading device includes:
a housing made of metal, including a bottom plate and having an open upper surface;
a document platen member mounted in an opening of the housing;
a scanning unit in which a light source is mounted and which emits light toward the document platen member while reciprocating along a predetermined scanning direction between the bottom plate and the document platen member;
a cable including a first end which is fixed to the scanning unit, a second end which is fixed to the bottom plate and an intermediate portion which is held in surface contact with the bottom plate and curved and deformed according to a reciprocal movement of the scanning unit; and
an insulating sheet interposed between the bottom plate and the intermediate portion of the cable; wherein:
the housing includes a recess formed in the bottom plate and extending in the scanning direction, the recess being a shallow groove having an open upper side, a flat bottom surface and a pair of inclined portions extending obliquely up from side edges of the bottom surface; and
the insulating sheet covers an opening of the recess, the upper surface thereof is in contact with the intermediate portion of the cable and a space is formed between the lower surface of the insulating sheet and the bottom surface of the recess.

### Claim 7 (depends on 6)

An image forming apparatus according to claim 6,
wherein:
the cable is a flat cable and a flat surface thereof is in contact with the insulating sheet; and
the opening of the recess is wider than the width of the flat surface of the flat cable.

### Claim 8 (depends on 6)

An image forming apparatus according to claim 6, wherein:
a distance between the lower surface of the insulating sheet and the bottom surface of the recess is 1 mm or longer.

### Claim 9 (depends on 6)

An image forming apparatus according to claim 6, wherein:
a distance between the lower surface of the insulating sheet and the bottom surface of the recess is 1 mm or longer; and
a distance between the side edge of the flat cable and the opening edge of the recess is 1 mm or longer.

### Claim 10 (depends on 6)

An image forming apparatus according to claim 6, wherein:
the insulating sheet includes a guide portion for guiding the cable.