Image sensor

• US 10,021,265 B2
• Filed: 03/03/2014
• Issued: 07/10/2018
• Est. Priority Date: 03/19/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Fujiuchi, Akiko, Matsumura, Seiichi
• Primary Examiner(s): RODRIGUEZGONZALEZ, LENNIN R
• Application Number:
  US14/777,948
• Publication Number:
  US 20160261763A1
• Time in Patent Office: 1,590 Days
• Field of Search: None
• CPC Class Codes: H04N 1/0249 Arrangements for mounting or supporting elements within a scanning head H04N1/02481 takes precedence
• CPC Class Codes: H04N 1/0285 in combination with at least one reflector which is in fixed relation to the light source
• CPC Class Codes: H04N 1/02865 using an array of light sources or a combination of such arrays, e.g. an LED bar
• CPC Class Codes: H04N 1/0306 using a plurality of optical elements arrayed in the main scan direction, e.g. an array of lenses
• CPC Class Codes: H04N 1/0315 using photodetectors and illumination means mounted on separate supports or substrates or mounted in different planes
• CPC Class Codes: H04N 1/0318 Integral pick-up heads, i.e. self-contained heads whose basic elements are a light-source, a lens array and a photodetector array which are supported by a single-piece frame
• CPC Class Codes: H04N 2201/02456 Scanning element, e.g. CCD array, photodetector
• CPC Class Codes: H04N 2201/02458 Lens or optical system
• CPC Class Codes: H04N 2201/02462 Illuminating means
• CPC Class Codes: H04N 2201/02468 using screws
• CPC Class Codes: H04N 2201/02485 Dedicated element, e.g. bracket or arm

Abstract

An image sensor includes: a lens configured to focus light irradiated toward an object to be read and reflected by the object to be read; a sensor configured to receive light focused by the lens; a sensor board configured to mount thereon the sensor; a board retaining plate, having a casing attachment surface extending in the X direction and a sensor board attachment reference surface that is in contact with the +Y side of the sensor board and is formed in a side surface of the casing attachment surface, and configured to retain the sensor board; and a first casing configured to fix or retain the board retaining plate by fastening of a surface of the casing attachment surface.

Claims

1. An image sensor, comprising:

a focusing optical system configured to focus light irradiated toward an irradiated object and reflected by the irradiated object;

a light receiver configured to receive light focused by the focusing optical system;

a sensor board configured to mount thereon the light receiver;

a board retaining plate configured to retain the sensor board, the board retaining plate includes a stepped portion extending in a main scanning direction, the stepped portion including a bottom surface and a side surface, and a reference surface being formed in the side surface of the stepped portion, the reference surface is in contact with a sub-scanning-direction end side of the sensor board and the bottom surface of the stepped portion is in contact with a bottom surface of the sensor board; and

a casing configured to fix or retain the board retaining plate by fastening of a surface of the stepped portion.

2. The image sensor according to claim 1, further comprising a sensor drive board having one end side being in contact with another sub-scanning-direction end side of the sensor board and another end side extending in the sub-scanning direction further than the board retaining plate, the sensor drive board being placed on the board retaining plate and configured to drive the light receiver.

3. The image sensor according to claim 1, wherein the board retaining plate further has a projecting portion on a backside opposite to the light receiver.

4. The image sensor according to claim 3, wherein the projecting portion extends in the main scanning direction.

5. The image sensor according to claim 2, wherein the board retaining plate further has a projecting portion on a backside opposite to the light receiver.

6. The image sensor according to claim 5, wherein the projecting portion extends in the main scanning direction.