JP2017175605A5 - - Google Patents

Description

However, in the configuration of Patent Literature 1, the opposing surfaces of the substrate (the flat metal member) and the light guide are fixed with an adhesive member. Therefore, when the light emitting element is continuously turned on and the substrate cannot sufficiently diffuse heat from the light emitting element, a situation may occur in which the light guide warps with respect to the substrate. In view of the above problems, an object of the present invention is to suppress a light guide from warping with respect to a substrate.

An image reading device for solving the above-mentioned problem is:
A light emitting element that emits light, a substrate on which the light emitting element is provided, and a light guide that guides light emitted from the light emitting element to a sheet ;
A reading unit light based on reflected light from the irradiation morphism been sheet over preparative reads an image of the sheet by the lighting unit,
Has,
The light guide includes a first surface of the substrate and the contact and positioning surface for positioning between the light guide and the substrate, the second surface abuts and the substrate opposite the first surface of the substrate a pressing portion which the first surface is to press the substrate so as Ru is pressed toward the positioning surface, characterized in that it comprises a.

According to the present invention, it is possible to La Itogaido to prevent the warps relative to the substrate.

Claims (12)

A light emitting element that emits light, a substrate on which the light emitting element is provided, and a light guide that guides light emitted from the light emitting element to a sheet ;
A reading unit light based on reflected light from the irradiation morphism been sheet over preparative reads an image of the sheet by the lighting unit,
Has,
The light guide includes a first surface of the substrate and the contact and positioning surface for positioning between the light guide and the substrate, the second surface abuts and the substrate opposite to the first surface of the substrate image reading apparatus characterized by comprising: a pressing portion which the first surface is to press the substrate so as Ru is pressed toward the positioning surface. It said first surface is a surface before Symbol Luminous element is al provided,
It said second surface includes an image reading apparatus according to claim 1, wherein the pre-Symbol Luminous element is a surface which have not been provided. The Raitogai de is a longitudinal positioning portion provided at a substantially central portion in the longitudinal direction of the light guide, Rukoto a longitudinal positioning section for performing positioning in the longitudinal direction of the light guide and the substrate The image reading device according to claim 1, wherein: The board is provided with a full recess before Symbol pressing portion fitting,
By the pressing portion is fit into the recess, according to any one of claims 1 to 3-position-decided Me and said light guide and the substrate in the longitudinal direction of the light guide, characterized in that the dividing line Image reading device. The pressing portion, the second pushing provided on different second position before the first pressing portion provided on the first position Keru you in Sulfur butterfly hand direction, and the first position in the longitudinal direction Department and
The concave portion in the longitudinal direction of the substrate, a first concave portion provided at a position corresponding to the first pressing portion and a second concave portion provided at a position corresponding to the second pushing portion Prepare,
The first pressing portion fits into the first recess, the image reading apparatus according to claim 4, wherein the second pressing unit is equal to or fits in the second concave portion. Gap between said first recessed portion and the first pressing portion in the longitudinal direction, to claim 5, characterized in that narrower than the gap between the second pressing portion and the second concave portion in the longitudinal direction The image reading device according to claim 1. The light emitting element includes a first light emitting element and a second light emitting element adjacent to the first light emitting element in a longitudinal direction of the substrate ,
The said pressing part presses the said board | substrate in the position between the said 1st light emitting element and the said 2nd light emitting element in the said longitudinal direction, The Claims 1 to 6 characterized by the above-mentioned. Image reading device. A plurality of the pressing portions are provided in a longitudinal direction of the light guide, a plurality of the positioning surfaces are provided in a longitudinal direction of the light guide, and the number of the positioning surfaces is larger than the number of the pressing portions. Item 8. The image reading device according to any one of Items 1 to 7. The said pressing part is arrange | positioned so that it may not overlap with the said positioning surface , when it sees the said board | substrate from the direction orthogonal to the 1st surface of the said board | substrate, The Claim 1 characterized by the above-mentioned. The image reading device according to claim 1.   The image reading device according to claim 1, wherein the pressing unit is a flexible arm, and presses the substrate by bending the arm.   The image reading device according to claim 1, wherein the substrate is made of metal, and the light guide is made of resin. An image reading device according to any one of claims 1 to 11,
An image forming unit that forms an image based on an image read by the image reading device;
An image forming apparatus comprising: