Resin-molded component and resin-molding mold

Patent metadata

Field	Value
Publication number	US-9533439-B2
Application number	US-201113521711-A
Country	US
Kind code	B2
Filing date	Jan 12, 2011
Priority date	Jan 13, 2010
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A resin-molded component includes a thin wall portion, and a rib-like projection configured to protrude from a back surface of the thin wall portion. The rib-like projection includes a plurality of plate-like projections arranged to be spaced from one another. Each of the plurality of plate-like projections is arranged such that an angle formed between a line connecting a point on a longer side of a bottom surface thereof to a gate provided in the thin wall portion and the longer side of the bottom surface thereof is within a range from 10 degrees to 80 degrees.

First claim

The invention claimed is:

1. A resin-molded component including a thin wall portion having a front surface and a back surface, the front surface including a mirror surface, a luster surface or an embossed surface, and formed by injecting resin from a gate into a cavity, comprising:
an array of plate-like projections, wherein the plate-like projections are arranged on a plurality of rows that are parallel to one side of an outer periphery of the resin-molded component and a plurality of columns that are parallel to another side of the outer periphery of the resin-molded component;
wherein each of the plate-like projections protrude from the back surface, wherein a bottom surface of each of the plate-like projections has a longer side and a shorter side, wherein the longer side of each of the plate-like projections is 10 mm or more and 30 mm or less, wherein the plate-like projections are arranged to be spaced from one another,
wherein each of the plate-like projections has an angle formed between the longer side of the plate-like projections and one row from the plurality of rows in which the plate-like projection is arranged such that each of the plate-like projections for the one row has a different angle,
wherein an angle formed between a line connecting a point on the longer side of each of the plate-like projections to a position in the thin wall portion corresponding to the gate and the longer side thereof is within a range from 10 degrees to 80 degrees.

2. The resin-molded component according to claim 1 , wherein the plurality of plate-like projections are arranged to be spaced from one another at intervals ranging from 20 mm to 40 mm.

3. The resin-molded component according to claim 1 , wherein a front surface of the thin wall portion is a mirror surface or an embossed surface.

4. The resin-molded component according to claim 1 , including a document cover of a document reading apparatus.

Assignees

• Michiyama Kazuyuki
• Naganuma Jun
• Canon Kk

Inventors

• Michiyama Kazuyuki
• Naganuma Jun

Classifications

• H04N2201/0422

  Media holders, covers, supports, backgrounds; Arrangements to facilitate placing of the medium (H04N2201/0406 - H04N2201/0412, H04N2201/0434 take precedence) · CPC title

• H04N1/00551

  Top covers or the like · CPC title

• B29C45/0046

  Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity · CPC title

• B29C45/372

  provided with means for marking or patterning, e.g. numbering articles · CPC title

• Y10T428/24479

  including variation in thickness · CPC title