Dome cover, camera device, injection molding die, and injection molding method

Patent metadata

Field	Value
Publication number	US-10401715-B2
Application number	US-201715714467-A
Country	US
Kind code	B2
Filing date	Sep 25, 2017
Priority date	Mar 26, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The invention provides a dome cover, a camera device, an injection molding die, and an injection molding method in which generation of a weldline is suppressed and deterioration of an acquired image is suppressed. In one aspect of the invention, a dome cover is a dome cover that covers a camera. The dome cover includes a curved section having a curved shape and a skirt section having a cylinder shape and has a top section at the curved section and an opening end section at the skirt section. The thickness of the dome cover is largest at the top section and smallest at the opening end section, and continuously decreases from the top section toward the opening end section. The inner diameter and the outer diameter of the dome cover continuously increase from the top section toward the opening end section.

First claim

What is claimed is:

1. A camera device comprising:
a camera; and
a dome cover that covers the camera, the dome cover comprising:
a curved section having a curved shape; and
a skirt section having a cylinder shape, the skirt section provided at one end of the dome cover,
wherein a top section is provided at the curved section and an opening end section is provided at the skirt section, the top section provided at another end of the dome cover,
wherein a thickness of the dome cover is largest at the top section and is smallest at the opening end section and continuously decreases from the top section toward the opening end section,
wherein an inner diameter and an outer diameter of the dome cover continuously increase from the top section toward the opening end section,
wherein the camera is capable of capturing an image including a boundary between the curved section and the skirt section, and
wherein a thickness T of the dome cover is expressed by the following formula in a case where a distance along an outer periphery of the dome cover from the top section to the opening end section is defined as x, a thickness of the dome cover at the opening end section is defined as t 1 , and a monotonously decreasing function is defined as f(x),
T=t 1+ f ( x ),

and wherein a thickness of opening end section is 85% or more and 90% or less than a thickness of the top section.

2. The camera device according to claim 1 ,
wherein the monotonously decreasing function f(x) is a primary function, a secondary function, or a cubic function.

3. The camera device according to claim 1 ,
wherein the monotonously decreasing function f(x) is a function expressed by a free curve.

4. The camera device according to claim 1 ,
wherein a shape of the curved section of the dome cover is an aspheric shape.

5. The dome cover according to claim 1 ,
wherein a shape of a longitudinal section of the dome cover is an elliptical shape.

6. The dome cover according to claim 1 ,
wherein a shape of a longitudinal section of the dome cover is a hyper-elliptical shape.

7. The camera device of claim 1 , wherein the monotonously decreasing function of an elliptical shape of the dome cover is f(x)=(x/a) 2 +(y/b) 2 =1.

8. The camera device of claim 1 , wherein the monotonously decreasing function of an hyper-elliptical shape of the dome cover is f(x)=(|x|/a) n +(|y|/b)p=1 (where p>2).

9. A camera device comprising:
a camera; and
a dome cover that covers a camera, the dome cover comprising:
a curved section having a curved shape at one end of the dome cover; and
a skirt section having a cylinder shape at another end of the dome cover opposite to the one end of the dome cover,
wherein the skirt section has a connection end section connected to the curved section and an opening end section opposite to the curved section, the opening end section provided at the another end of the dome cover,
wherein a thickness of the curved section is uniform,
wherein a thickness of the skirt section is largest at the connection end section and smallest at the opening end section and continuously decreases from the connection end section toward the opening end section,
wherein the camera is capable of capturing an image including a boundary between the curved section and the skirt section),
and wherein a thickness of opening end section is 85% or more and 90% or less than a thickness of the top section.

10. The camera device according to claim 9 ,
wherein the curved section has a top section, and
wherein an inner diameter and an outer diameter of the dome cover continuously increase from the top section toward the opening end section.

11. The camera device according to claim 9 ,
wherein the dome cover is manufactured by an injection molding method.

Assignees

• Fujifilm Corp

Inventors

• Watanabe Seiichi

Classifications

• H04N23/51

  Housings · CPC title

• G03B17/56 Primary

  Accessories (carrying-cases A45C11/38) · CPC title

• G03B17/02

  Bodies · CPC title

• G03B11/00

  Filters or other obturators specially adapted for photographic purposes · CPC title

• B29L2031/773

  Dome-shaped (igloos B29L2031/106, frameless domes B29L2025/00) · CPC title