Electronic apparatus including photoelectric switch

• US 4,990,768 A
• Filed: 11/09/1989
• Issued: 02/05/1991
• Est. Priority Date: 11/11/1988
• Status: Expired due to Term

• Current Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Original Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Inventors: Hara, Masato, Kondo, Ichiro, Ito, Mutsuo, Shimokawa, Satoru
• Primary Examiner(s): Nelms, David C.
• Application Number:
  US07/433,787
• Time in Patent Office: 453 Days
• Field of Search: 250/239, 174/50.54, 361/395, 361/397, 361/399
• US Class Current: 250/239
• CPC Class Codes: G01V 8/12 using one transmitter and one receiver

Abstract

An electronic apparatus includes a case body having an opening in an upper side thereof, an annular groove provided on the outer periphery of the opening and an engaging hole in a portion of the case above the annular groove, an annular sealing ring inserted into the annular groove, a frame for supporting printed circuit boards on which electronic circuitry is mounted, the frame being formed to include a terminal base provided on the side of the opening of the case body, and having a resilient projection for mating with the engaging hole of the case body from an inner side thereof, and a main body cover provided with an inwardly directed projection for mating with the engaging hole of the case body from an outer side thereof, the main body cover covering the opening by mating the projection with the engaging hole of the case body.

Claims

1. An electronic apparatus comprising:

a case body (10) having an opening in an upper side thereof, an annular groove (13) provided on the outer periphery of the opening and an engaging hole (15) in a portion of the case above the annular groove;

an annular sealing ring (14) inserted into said annular groove;

a frame (20) for supporting printed circuit boards (28,29,30) on which electronic circuitry is mounted, said frame being formed to include a terminal base provided on the side of the opening of said case body, said frame having a resilient projection (25) for mating with the engaging hole of said case body from an inner side thereof; and

a main body cover (50) provided with an inwardly directed projection (52) for mating with the engaging hole (15) of said case body from an outer side thereof, said main body cover covering said opening by mating the projection with the engaging hole of said case body.

2. An electronic apparatus comprising:

a case body (10) having an upper side which is open; and

a frame (20) for holding a printed circuit board (28) on which electronic circuitry is mounted, said frame being retained inside said case body and having a terminal base;

wherein said terminal base of said frame (20) is provided with the printed circuit board (28) on one side face thereof and has an insert fixing groove (41A-41E) for guiding a terminal attaching member (39) into said frame from the side and for preventing said terminal attaching member from being pulled out from above, and a terminal guide (42C, 42D, 42E) for guiding a pin (39e) of said terminal attaching member inserted from another side surface to the printed circuit board (28).

3. An electronic apparatus comprising:

a case (10);

a frame (20) disposed inside said case and on which parts are mounted; and

a display element (31) mounted on a printed circuit board (29) within said frame;

characterized by having a notch (32) formed in said frame at a position at which said display element is to be mounted, said notch being cut in from one side of said frame, and a cylindrical member (34) provided on the printed circuit board (29) and formed to have a plate-shaped piece (33) on one side thereof for mating with the notch of said frame, said display element being provided on said cylindrical member.

4. A photoelectric switch comprising:

a case (10); and

a photoelectric element holder portion (24) mounted within said case and facing a front side of said case for holding a photoelectric element (27);

characterized in that said photoelectric element holder portion is provided with a step (69) having a shape substantially the same as that of a filter (66) for holding the filter orthogonal to an optic axis, and a plurality of engaging portions (67), located at an outer periphery of said step, for engaging edge portions of said filter, wherein said filter is held within said step by engaging the edge portions thereof by said engaging portions of said photoelectric element holder portion.

5. A transmission-type photoelectric switch having a light-emitting element or a light-receiving element, characterized in that a lens plate (70) is provided in a rectangular opening (11) of a case (10), forms a central portion of a lens (71) at a position offset from the center of said lens plate, and forms arcuate grooves (72), having a shape approximately the same as that of the lens, at one side of said lens.

6. An electronic apparatus comprising:

a case body (10) an upper side of which is open;

a terminal base provided inside said case body and formed to include a plurality of terminal holding portions for power supply and output as recesses, said terminal base holding terminals (40A-40E) on a bottom side thereof;

a terminal base cover (55) having protrusions (55a, 55b) which fit into the recesses of said terminal base for covering said plurality of terminal holding portions, an upper side of said terminal base cover having a resilient projection (56) and an aperture (57) at a position corresponding to the center of a predetermined terminal; and

a main body cover (50) for covering the opening of said case body and abutting against said resilient projection of said terminal base cover.

7. An electronic apparatus equipped with a shielding plate, comprising:

a shielding plate (60) a lower end of which has a plurality of projections (61), said projections having anchoring portions (61a, 61b) protruding at least to one side; and

a printed circuit board (28) provided with holes (62) at positions corresponding to the projections of said shielding plate, said projections being inserted into said holes to connect said shielding plate to said printed circuit board.

8. An electronic apparatus in which an individual part is attached to a printed circuit board, comprising:

a holder portion (23) for holding an individual part (26); and

a positioning hook (45) provided at one end of said holder portion for holding a respective electrode pin (26A) of the individual part, said held electrode pin being fixedly inserted into an opening (45) of said printed circuit board (28).