JPH09153689A - Control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control apparatus capable of easily and tightly assembling transparent parts which transmit light for indication or light projection/ reception, without requiring the design at a high dimensional accuracy or needing any large apparatus or jig for assembling and is advantageous in the assembling man-hour and cost. SOLUTION: Transparent parts, i.e., lens fibers 3 are inserted and held in a window 2 of a case to face at light emitting devices 6 while protrusions 9 formed on the fibers 3 are butted to a circuit board 4 fixed to the interior of the case to thereby assemble the fibers 3 in the case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device in which a transparent component that transmits light for displaying or projecting / receiving light is installed in a device case facing a light emitting or light receiving element in the device case. is there.

[0002]

2. Description of the Related Art Conventionally, a control device such as a controller, which functions as a relay terminal for inputting and outputting sensor signals and the like, has a display unit for displaying various states by light emission of a light emitting element and a light receiving unit for emitting and receiving light. There are those equipped with photoelectric switches etc. that detect the presence or absence of a detected object from changes in quantity,
Transparent parts that transmit light for displaying or projecting / receiving light are incorporated in a device case. The transparent component is incorporated into the window portion of the equipment case by elastically detaching, so-called snap fitting, press fitting, screwing, ultrasonic welding or the like.

FIG. 6 to FIG. 8 show the construction of a status indicator section in a relay terminal control device using a conventional assembling method. 6 is a side sectional view of the device, FIG. 7 is a perspective view of the indicator light portion, and FIG. 8 is a bottom view of the indicator light portion. Lens fiber (transparent component) 10 made of transparent resin or the like for light transmission
1 is fixed to the window portion 103 of the device case 102 from the inside thereof only by snap-fitting or in combination with press-fitting. The case 102 is integrally formed with a snap-fitting claw 104 for fixing the snap-fit, and the guide 10 for guiding the lens fiber 101 at the time of fitting.
5 are formed. A substrate 106 is fixed as an assembly assembly in the case 102, and a light emitting diode (L) is attached to the substrate 106 at a position facing the lens fiber 101.
ED) 107 is arranged.

[0004]

However, in the structure of the status indicating lamp section using the above-described assembling method, (1) the fitting of the lens fiber 101 to the window section 103 becomes severe, so Sometimes high dimensional accuracy is required, and (2) if a large external force is applied to the lens fiber 101, it may fall off. Furthermore, in (3) fixing by press-fitting, the fitting force between the parts weakens due to aging, and the parts may fall off, and a large force is required for press-fitting the parts, which makes assembly difficult (4)
Fixing by ultrasonic welding or press fitting requires a large-scale device or jig, which is disadvantageous in terms of assembly man-hours and cost.
There is a problem.

The present invention has been made in order to solve the above-mentioned problems, and a transparent component which transmits light for displaying or projecting / receiving light can be easily and firmly incorporated in a device case, Moreover, it is an object of the present invention to provide a control device that is not required to be designed with high dimensional accuracy, does not require a large-scale device or jig for assembling, and is advantageous in terms of assembly man-hours and cost.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a transparent component which transmits light for displaying or projecting / receiving light, facing a window portion of a device case and arranged in the case. In a control device that is installed in the case so as to face the light-emitting or light-receiving element, the transparent component is inserted and held in the window of the device case, and is formed so as to integrally project with the transparent component inward. It has a protrusion, and the protrusion abuts on a member fixed inside the equipment case.

In the above structure, the transparent component is inserted and held in the window of the equipment case, and the projection formed on the transparent component is brought into contact with the member fixed inside the equipment case. The transparent parts are built into the equipment case. The transparent component may be inserted into the window by simple snap fitting, press fitting, or a combination thereof, and since the protrusion of the transparent component is brought into contact with the fixing member, sufficient fixing strength can be obtained. .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 is an external view of a control device as a wire-saving terminal, FIG. 2 is an exploded perspective view of the same,
3 is a sectional view of the same side, FIG. 4 is an exploded perspective view of a portion where a transparent component is incorporated, and FIG. 5 is a bottom view of the same portion. In these figures, a case 1 of a control device is made of a resin molded product or the like, and a window portion 2 for emitting status display light to the outside is opened on the front surface of the case 1, and the window portion 2 is provided with a light A lens fiber (transparent component) 3 formed of a transparent resin or the like that passes through is inserted and held from the inside to be incorporated into the case 1. A circuit board 4, which is an assembled assembly, is fixed inside the case 1 by screws, and a base 5 is fitted from below the case 1 by fitting and coupling so as to close the lower surface opening.

A light emitting element 6 such as an LED that emits light for displaying a state is arranged on the circuit board 4 at a position facing the window 2, and a lens fiber inserted and held in the window 2 of the case 1 is arranged. The inner side surface of 3 faces the light emitting element 6 with a slight gap. Further, the case 1 is integrally formed with pawls 7 and 7 for holding the lens fiber 3 in the window portion 2 by a snap fit when the lens fiber 3 is inserted, and a guide for guiding the insertion of the lens fiber 3 8 is formed, and when the lens fiber 3 is inserted into the window portion 2, it is held by the claws 7 by a snap fit.

Further, the lens fiber 3 has a protrusion 9 protruding inward (in the state of being assembled in the case 1).
Are integrally formed, and in the assembled state, the projection 9 is brought into contact with or in contact with the upper surface of the circuit board 4. The projections 9 are provided at least at two positions on the diagonal line of the inner end surface of the lens fiber 3, and the contact or contact position with the circuit board 4 is in the vicinity of the light emitting element 6 on the circuit board 4. Become. The circuit board 4 is an assembly assembly of two upper and lower horizontal boards and two vertical boards that connect them. The circuit board 4 includes a sensor connection connector 11 and a transmission signal connector. 12, a dip switch 13, and other parts are mounted.

In the control device of the above embodiment, the lens fiber 3 is inserted into the window portion 2 of the case 1 and temporarily held by the snap-fitting claws 7, 7, and then the circuit board 4 is held in the case 1. When it is fixed by screwing, the circuit board 4 comes into contact with the projection 9 of the lens fiber 3. Thereby, the lens fiber 3 is firmly fixed. In this state, the lens fiber 3 faces the light emitting element 6 arranged on the circuit board 4, and the light emitted from the light emitting element 6 is emitted to the outside from the window 2 of the case 1 through the lens fiber 3. , Functions as an indicator for status, etc.

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the one functioning as an indicator light for the state and the like is shown, but the same applies to the case where a lens fiber is provided in the light projecting / receiving unit of a photoelectric switch or the like having a light projecting element and a light emitting element. The configuration is applicable.

[0013]

As described above, according to the control device of the present invention, the transparent component is inserted and held in the window of the device case, and the projection of the transparent component is brought into contact with the member fixed inside the device case. Therefore, even if the transparent component is simply inserted into the window, sufficient fixing strength can be obtained. Therefore, the following effects are also obtained. (1) Since high fitting accuracy of parts is not required unlike the conventional fixing method using only snap fitting, the design tolerance is expanded and the design cost is reduced. (2) There is no risk of parts falling off when a large external force is applied as in the case of fixing only by snap fit. (3) There is no risk that the fitting force between parts will decrease due to aging, as in the case of fixing only by press fitting, and the insertion force during assembly can be greatly reduced compared to the fixing method only by press fitting and snap fitting. It is possible to secure drop strength equal to or higher than external force. (4) Since a large-scale device or jig is not required at the time of assembling such as fixing by ultrasonic welding or fixing only by press fitting, the number of assembling steps and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view of a control device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a side sectional view of the same.

FIG. 4 is an exploded perspective view of a portion where a transparent component is incorporated.

FIG. 5 is a bottom view of the same portion.

FIG. 6 is a side sectional view of a conventional control device.

FIG. 7 is a perspective view of an indicator lamp unit of the control device.

FIG. 8 is a bottom view of an indicator lamp section of the control device.

[Explanation of symbols]

 1 Case 2 Window 3 Lens Fiber (Transparent Parts) 4 Circuit Board 6 Light Emitting Element 7 Snap-Fit Claw 9 Protrusion

Claims (1)

[Claims] 1. A transparent component, which transmits light for displaying or projecting / receiving light, is incorporated in the case so as to face a window of the equipment case and face a light emitting or light receiving element arranged in the case. In the control device, the transparent component is inserted and held in a window portion of the device case, and has a protrusion integrally formed inward with the transparent component, and the protrusion is fixed inside the device case. A control device, wherein the control device is configured to come into contact with the formed member.