JPH07262891A - Photoelectric sensor - Google Patents

Abstract

PURPOSE:To provide a photoelectric sensor whose assembling is simple and easy. CONSTITUTION:A photoelectric sensor has a transparent cover plate 17 for sealing, formed almost the same diameter as a window hole 13 of a horizontal plate 11 of a main body case 1 and fit to the window hole 13 so as to be arranged on front surface of light projecting-receiving elements 51, 51, and an operation component incorporating unit 3 having a frame-shaped box on the back side on an operating surface and in which the box is fit to a window hole 19 of a vertical plate 12 of the main body case 1. On assembly, the cover plate 17 and the operation component incorporating unit 3 are inserted into the window holes 13, 19 from the outside of the main body case 1, then fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoelectric sensor in which each component is unitized and incorporated into a main body component.

[0002]

2. Description of the Related Art Usually, a photoelectric sensor is composed of a circuit board, a light emitting / receiving element, a potentiometer (multi-turn potentiometer), a mode changeover switch and an operation confirmation indicator light. It is electrically connected to. The light emitting / receiving element, the volume photographing section, and the switch operating section of the changeover switch are set so as to project outward from the main body parts.

In the reflection type photoelectric switch, after the volume photographing is operated to adjust the detection level, light is projected from the light projecting element to the object to be detected and the reflected light is received by the light receiving element to detect the object to be detected. The presence or absence of is detected. In addition, there is a conventional photoelectric sensor in which two parts are sandwiched to store the parts in the main part.

[0004]

The conventional photoelectric sensor is
Each constituent electronic component, that is, a light emitting / receiving element, a volume, a mode changeover switch, and an operation confirmation indicator light (LED) is separately built in and soldered to a circuit board built in the main body component. Therefore, the assembling work is complicated and time-consuming. For example, in the case of a movable member having a large number of parts such as a multi-rotation volume, there are problems in the assembling accuracy and the seal structure. Further, the method of sandwiching the parts between the two cases also has a problem that the assembling accuracy is still poor.

According to the present invention, each component is made into a unit, and the transparent lid portion and the operation component unit are inserted into the window hole opening and the window hole portion of the main body component from the outside and fitted, respectively. It is an object of the present invention to solve the above problems and to provide a photoelectric sensor that requires less assembly time and has high assembly accuracy.

[0006]

A photoelectric sensor according to the present invention comprises a horizontal plate portion having a window opening, and a main body part having a vertical plate portion continuous with the horizontal plate portion and having a window hole, A photoelectric element arranged toward the window opening of the main body part, and a transparent member formed to have a diameter substantially the same as that of the window hole of the main body part and fitted into the window hole so as to be arranged on the front surface of the photoelectric element. An operation component unit that has a lid portion, an operation surface portion, and a box-shaped box portion on the back side of the operation surface portion, and the box portion is fitted into the window hole portion of the vertical plate portion of the main body component. ,
It is composed of a substrate portion and a cover body that is attached to the main body component and closes the substrate portion.

In this photoelectric sensor, the transparent lid portion is incorporated into the main body component by inserting the transparent lid portion from the outside of the window hole opening of the horizontal plate portion of the main body component, and the vertical lid of the main body component is incorporated. By inserting the operation part unit from the outside into the window part of the plate part and fitting it, the operation part unit is incorporated in the main body part, and the photoelectric sensor including the transparent lid part and the operation part unit is easily and easily assembled. be able to.

[0008]

FIG. 3 is an external perspective view showing a concrete embodiment of a photoelectric switch as a photoelectric sensor according to the present invention. The photoelectric switch has a main body case (main body part) 1 having a U-shaped cross section having a transparent lid 17 for sealing on its upper surface, and an operation to be fitted and arranged in the main body case from one side surface side of the main body case 1. A section "U" which is fitted to the component built-in unit 3 and the body case 1 and hermetically protects each single unit (the substrate unit 2, the operation component built-in unit 3 and the light emitting / receiving element) in the body case 1. It is composed of a letter-shaped sealing cover body 4.

FIG. 1 is an exploded perspective view showing the photoelectric switch of the embodiment. The main body case 1 is formed of a synthetic resin material or the like in a U-shaped cross section in which vertical plate portions 12 and 12 are provided so as to face each other at both ends of a flat plate-shaped horizontal plate portion 11. A window hole portion 13 through which the light projecting element 51 and the light receiving element 52 are exposed is opened in the surface of the horizontal plate portion 11 and is projected below the window hole portion 13 (that is, the back surface side of the horizontal plate portion 11). -The storage chamber portion 14 for separately storing the light receiving elements 51 and 52 is provided. Further, a protective transparent plate 15 and a filter 16 are provided in the upper opening (window hole portion 13) of the accommodation chamber portion 14, respectively, and the window hole portion 1 is formed.
3. A transparent cover plate 17 for sealing, which is provided with a leg portion that fits properly with
Is fitted to form a sealed structure. Emitter / receiver elements 51, 5
No. 2 is loaded from the lower opening side of the accommodating chamber portion 14 and is set so as to be able to project and receive light through the transparent lid plate 17. Further, a mounting window hole portion 19 is opened in the surface of the one vertical plate portion 12 of the main body case 1, and the mounting window hole portion 19 is provided.
The operation component built-in unit 3 to be described later is fitted therein.

As shown in FIG. 2, the operation component built-in unit 3 has a frame-shaped box portion 3 on the back surface side of a flat plate-shaped operation surface portion 31.
2 and has operation confirmation indicators 34 and 3 in the box 32.
4 (red LED, green LED), shaft 35a, ceiling 35b, memory plate 35c, volume 35 including main body 35d, shaft 36a, and ceiling 36.
b, a mode changeover switch 36 including a main body 36c is built in, and a printed circuit board 33 is adhered to the opening surface of the box portion 32 to form a hermetically sealed unit. On this printed circuit board 33, operation confirmation indicators 34, 34 (red LE
D, green LED) terminals 34b, 34b, volume 35 terminal 35e, and switch 36 terminal 36d.
Are connected respectively. Further, a lamp portion (light emitting portion) 34a of the operation confirmation indicator light, a photographing portion of the shaft 35a of the volume, and a photographing portion 36a of the shaft 36a of the changeover switch are projected on the operation surface portion 31 side. The operation component built-in unit 3 is set to a size such that the box portion 32 is fitted tightly into the mounting window hole portion 19 of the main body case 1.

The board unit 2 shown in FIG. 1 is a printed circuit board unit, and has a flat plate-like bottom portion 21, vertical portions 22 and 22 rising in opposite directions from both sides of the bottom portion 21, and both vertical portions. It is composed of a main board portion 23 which is arranged between 22 and which is parallel to the bottom, and the outer surface of the board having a "U" -shaped cross section is covered with a shield plate 24 having a substantially U-shaped shape, that is, a "U" -shaped cross section. It constitutes a board unit. The board unit 2 covered with the shield plate 24 is fitted and arranged from the lower side of the opening of the main body case 1. Further, the substrate unit 2 arranged in the main body case 1 is covered with a sealing cover body 4 described later.

The sealing cover body 4 has a bottom surface portion 41 and vertical wall portions 42, 42 rising from the bottom surface portion 41 in an opposed manner.
The main body case 1 is formed in a U-shaped cross section and is fitted into the main body case 1 to close both side surface portions and the lower surface opening of the main body case 1. In the photoelectric switch having such a configuration, a main body case 1 having a U-shaped cross section, an operation component built-in unit 3 having, for example, a volume, a mode changeover switch, an operation confirmation indicator light, and the like, and a board unit 2 are provided.
And a cover member 4 for sealing, and each component is configured as a single unit. The photoelectric switch is completed simply by incorporating the individual units 2, 3, 4 into the main body case 1. That is, the light projecting / receiving elements 51 and 52 are arranged in the accommodation space 14 of the main body case 1, and the board unit 2 is arranged in the main body case 1. Further, the operation component built-in unit 3 is fitted into the mounting window hole portion 19 of the main body case 1. In this state, the terminals 51a and 52a of the light emitting / receiving elements 51 and 52, the volume terminal 35 of the operation component built-in unit 3, the operation confirmation indicator light terminal 34, and the changeover switch terminal 36 are respectively arranged on the substrate (for example, the main substrate 23) 2 Corresponding to. Here, the terminals 51a, 52a, 35, 34, 36 are soldered to the board 23. Then, the sealing cover body 4 having a U-shaped cross section is fitted to the main body case 1 from the bottom surface 21 side of the substrate unit 2 to hermetically close both side surfaces and the lower surface opening of the main body case 1. Further, the lead wire 6 connected to the internal substrate 2 is pulled out from the lower portion of the other vertical plate portion 12 of the main body case 1. As a result, the photoelectric switch can be assembled by an extremely simple operation. Also, by making each component into a single unit, it is not acceptable to improve the assembly accuracy,
The characteristic inspection for each unit can be easily performed. Furthermore,
Since each component is a single unit, disadvantages such as intrusion of resin into a movable part such as a volume are eliminated when the main body case 1 is filled with resin, for example.

[0013]

According to the present invention, a transparent lid portion formed to have a diameter substantially the same as that of the window hole opening of the main body part and fitted into the window hole opening so as to be arranged on the front surface of the photoelectric element, an operation surface portion, A frame-shaped box portion is provided on the back side of the operation surface portion, and the box portion is provided with an operation component unit that is fitted into the window hole portion of the vertical plate portion of the main body component, the transparent lid portion and the operation component unit. Is designed to be inserted into and fitted into the window hole opening and the window portion of the main body part, respectively, so that the transparent lid part is inserted from the outside of the window hole opening of the horizontal plate portion of the main body part during assembly. The transparent lid is incorporated into the main body component by inserting and fitting, and the operating component unit is inserted and fitted from the outside into the window hole of the vertical plate portion of the main body component. The operation parts unit is incorporated, and the light including the transparent lid and the operation parts unit is included. The sensor, simple and can be easily assembled.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a photoelectric sensor according to an embodiment.

FIG. 2 is an exploded perspective view of a unit with a built-in operation component of the photoelectric sensor.

FIG. 3 is an external perspective view of the photoelectric sensor of the embodiment.

[Explanation of symbols]

 1 Body Case 3 Unit with Built-in Operation Parts 11 Horizontal Flat Plate 12 Vertical Plate 13 and 19 Window Hole 17 Transparent Lid Plate for Sealing 51 Light Emitting / Receiving Element

Claims (1)

[Claims] 1. A main body component having a horizontal plate portion having a window hole opening and a vertical plate portion having a window hole portion connected to the horizontal plate portion, and a photoelectric device arranged toward the window hole opening of the main body component. An element, a transparent lid portion formed to have substantially the same diameter as the window opening of the main body part and fitted in the window opening so as to be arranged on the front surface of the photoelectric element, an operation surface portion, and a back side of the operation surface portion. A frame-shaped box portion, and the box portion is fitted to the window hole portion of the vertical plate portion of the main body component; a base plate portion; A photoelectric sensor including a cover body that closes a portion, wherein the transparent lid portion and the operation component unit are inserted into and fitted into a window hole opening and a window hole portion of the main body component, respectively. Photoelectric sensor characterized by.