Welded sensor device for preventing deformation from heat generation during the welding of the welded sensor device

Patent metadata

Field	Value
Publication number	US-10293973-B2
Application number	US-201615390938-A
Country	US
Kind code	B2
Filing date	Dec 27, 2016
Priority date	Mar 3, 2016
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A sensor device includes: a casing provided with an opening; a cover member covering the opening; a gasket interposed between the cover member and the casing; and a fixing cover which fixes both the gasket and the cover member to the casing. A plurality of welded portions bonding the casing and the fixing cover together are provided in a region outside the cover member such that the welded portions are distant from each other.

First claim

What is claimed is:

1. A sensor device comprising:
a casing provided with an opening;
a cover member covering the opening;
a gasket interposed between the cover member and a portion of the casing located at a peripheral edge of the opening, to surround the opening; and
a fixing cover pressing the cover member toward the casing and thus holding the cover member to bring the gasket into close contact with the casing and the cover member, a plurality of welded portions bonding the casing and the fixing cover together,
wherein the welded portions are provided outside of the cover member such that each of the welded portions are distant enough from the gasket such that the welding of the welding portions does not melt the gasket when the welded portions are welded, wherein the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the gasket in a direction along a normal to an opening plane of the opening.

2. The sensor device according to claim 1 , wherein:
the casing includes a first external surface provided with the opening, a second external surface extending continuously from the first external surface to configure a first projected corner with the first external surface, and a third external surface located on a side opposite to that on which the second external surface is located as seen from the first external surface, and extending continuously from the first external surface to configure a second projected corner with the first external surface;
the fixing cover includes a first plate-like portion which covers at least a portion of the first external surface, a second plate-like portion which covers at least a portion of the second external surface, and a third plate-like portion which covers at least a portion of the third external surface such that the fixing cover straddles the first external surface, the second external surface, and the third external surface;
at least one of the plurality of welded portions is provided to bond the second external surface and the second plate-like portion together; and
at least another one of the plurality of welded portions is provided to bond the third external surface and the third plate-like portion together.

3. The sensor device according to claim 2 , wherein the first external surface and the first plate-like portion are not bonded together.

4. The sensor device according to claim 3 , wherein the second plate-like portion and the third plate-like portion are pressed against the second external surface and the third external surface, respectively, by a resilient force which the fixing cover has.

5. The sensor device according to claim 4 , wherein the first projected corner and the second projected corner are each provided with a chamfered portion.

6. The sensor device according to claim 5 , wherein:
the first external surface is provided with a loop groove in which the gasket is accommodated; and
the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in the direction along the normal to the opening plane of the opening.

7. The sensor device according to claim 4 , wherein:
the first external surface is provided with a loop groove in which the gasket is accommodated; and
the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in the direction along the normal to the opening plane of the opening.

8. The sensor device according to claim 3 , wherein the first projected corner and the second projected corner are each provided with a chamfered portion.

9. The sensor device according to claim 8 , wherein:
the first external surface is provided with a loop groove in which the gasket is accommodated; and
the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in the direction along the normal to the opening plane of the opening.

10. The sensor device according to claim 3 , wherein:
the first external surface is provided with a loop groove in which the gasket is accommodated; and
the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in the direction along the normal to the opening plane of the opening.

11. The sensor device according to claim 2 , wherein the second plate-like portion and the third plate-like portion are pressed against the second external surface and the third external surface, respectively, by a resilient force which the fixing cover has.

12. The sensor device according to claim 11 , wherein the first projected corner and the second projected corner are each provided with a chamfered portion.

13. The sensor device according to claim 12 , wherein:
the first external surface is provided with a loop groove in which the gasket is accommodated; and
the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in the direction along the normal to the opening plane of the opening.

14. The sensor device according to claim 11 , wherein:
the first external surface is provided with a loop groove in which the gasket is accommodated; and
the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in the direction along the normal to the opening plane of the opening.

15. The sensor device according to claim 2 , wherein the first projected corner and the second projected corner are each provided with a chamfered portion.

16. The sensor device according to claim 15 , wherein:
the first external surface is provided with a loop groove in which the gasket is accommodated; and
the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in the direction along the normal to the opening plane of the opening.

17. The sensor device according to claim 2 , wherein:
one of the second external surface and the second plate-like portion is provided with a first engaging portion;
the other of the second external surface and the second plate-like portion is provided with a first engaged portion;
one of the third external surface and the third plate-like portion is provided with a second engaging portion;
the other of the third external surface and the third plate-like portion is provided with a second engaged portion; and
the first engaging portion and the first engaged portion are engaged together and the second engaging portion and the second engaged portion are engaged together.

18. The sensor device according to claim 2 , wherein a portion of the first plate-like portion immediately adjacent to the second plate-like portion and a portion of the first plate-like portion immediately adjacent to the third plate-like portion are both formed to be bent to be away from the first external surface.

19. A sensor device comprising:
a casing provided with an opening;
a cover member covering the opening;
a gasket interposed between the cover member and a portion of the casing located at a peripheral edge of the opening, to surround the opening; and
a fixing cover pressing the cover member toward the casing and thus holding the cover member to bring the gasket into close contact with the casing and the cover member, a plurality of welded portions bonding the casing and the

Assignees

• Omron Tateisi Electronics Co

Inventors

• Mizusaki Hiroyuki
• Nakashima Hirotaka
• Ohashi Kazuyuki
• Sugimoto Makoto

Classifications

• B65D7/42

  Details of metal walls (casks, barrels or drums in their entirety B65D7/045; other container details B65D23/00, B65D25/00) · CPC title

• H01L31/0203

  Electricity · mapped topic

• B65D85/38

  for delicate optical, measuring, calculating or control apparatus · CPC title

• G01J1/0407 Primary

  Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings · CPC title

• B65D7/38 Primary

  formed by soldering, welding, or otherwise uniting opposed surfaces · CPC title