Fluid tight ultrasonically welded photoelectric device

• US 4,211,923 A
• Filed: 03/17/1978
• Issued: 07/08/1980
• Est. Priority Date: 03/18/1977
• Status: Expired due to Term

• Current Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Original Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Inventors: Fukuyama, Toshifumi, Hattan, Hideaki
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): Westin, Edward P.
• Application Number:
  US05/887,795
• Time in Patent Office: 844 Days
• Field of Search: 250/239, 156/73.1, 156/380, 350/245, 350/252
• US Class Current: 250/239
• CPC Class Codes: B29C 65/08 using ultrasonic vibrations non-plastics element to plastics elements B29C65/645
• CPC Class Codes: B29C 66/12469 being asymmetric
• CPC Class Codes: B29C 66/30223 said melt initiators being rib-like
• CPC Class Codes: B29C 66/54 Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• CPC Class Codes: B29C 66/5414 said substantially flat extra element being rigid, e.g. a plate B29C66/5416 takes precedence
• CPC Class Codes: B29C 66/73361 at least one of the parts to be joined being opaque to visible light
• CPC Class Codes: B29C 66/73365 at least one of the parts to be joined being transparent or translucent to visible light
• CPC Class Codes: B29L 2031/3481 Housings or casings incorporating or embedding electric or electronic elements
• CPC Class Codes: G08B 13/181 using active radiation detection systems
• CPC Class Codes: H01L 31/16 the semiconductor device sensitive to radiation being controlled by the light source or sources
• CPC Class Codes: H03K 17/941 using an optical detector H03K17/968 takes precedence

Abstract

A photoelectric switch comprising a housing which encloses at least a light emitting element or a light responsive element. The housing consists of two opaque plastic shells welded to each other by ultrasonic welding and a window means of transparent plastic simultaneously welded to the shells by said ultrasonic welding. The window means is formed and attached to the shells in such a manner that it includes no peripheral portion which is in parallel with the direction of ultrasonic welding pressure.

Claims

1. A photoelectric switch comprising:

a housing consisting of two shells of opaque plastic material welded together by ultrasonic welding;

a window means of transparent plastic material welded to said shells by said ultrasonic welding, said window means being formed and attached to said shells in such a manner that it includes no peripheral portion which is in parallel with a welding pressure direction of said ultrasonic welding;

at least one electrooptical transducer disposed in said housing is a position to optically communicate with the exterior of said housing through said window means;

an electrical circuit means placed in said housing and connected to said at least one electrooptical transducer; and

an electric conductor connected to said electrical circuit means and led out of said housing.

2. A photoelectric switch as claimed in claim 1, wherein said window means has a polygonal configuration.

3. A photoelectric switch as claimed in claim 2, wherein said window means has a square configuration and a diagonal line which is coincident with a welding plane of said shells.

4. A photoelectric switch as claimed in claim 2, wherein said window means has a hexagonal configuration, a diagonal line of which is coincident with a welding plane of said shells.

5. A photoelectric switch as claimed in claim 1, wherein said window means has a lenticular configuration, the apsis line of which is coincident with a welding plane of said shells.

6. A photoelectric switch as claimed in claim 1, wherein said window means is a lens.

7. A photoelectric switch as claimed in claim 1, wherein said window means is an optical filter.

8. A photoelectric switch as claimed in claim 1, wherein said window means is positioned to one side of said housing and said electric conductor is led out of said housing from another side of the housing opposite to said one side.

9. A photoelectric switch as claimed in claim 1, wherein either one of said window means and said shells is provided with a peripheral projection to provide a fluid-tight engagement therebetween.

10. A photoelectric switch comprising:

a housing of a rectangular prism configuration consisting of two shells of opaque plastic material welded together by ultrasonic welding;

a window means of transparent plastic material welded to said shells by said ultrasonic welding, said window means being formed in a polygonal configuration and having a diagonal line which is coincident with a welding plane of said shells;

a light source element and a light responsive element placed in said housing such that said light source element emits a light to the exterior of said housing and said light responsive element receives the light reflected from any article through said window means;

an electrical circuit means placed in said housing and connected to said elements; and

,

an electric conductor connected to said electrical circuit means and extending out of said housing.

11. A photoelectric switch as claimed in claim 10, wherein either one of said window means and said shells is provided with a peripheral projection to provide a fluid-tight engagement therebetween.