JPS5922495Y2 - Optical detection head for program setter - Google Patents

Description

[Detailed description of the invention] The present invention relates to an optical detection head for a program setting device, and more specifically, it has a function of optically detecting a program curve drawn on a program sheet. This invention relates to an optical detection head that is movably arranged, and provides an optical detection head that has a relatively simple configuration and is easy to assemble, wire, adjust, etc.

Generally, in this type of optical detection head, a light emitting element and a light receiving element with sharp directivity are often used to improve efficiency.

Therefore, there is a drawback that a considerable amount of man-hours are required for assembly, adjustment, etc.

In addition, since such a detection head is driven by a servo mechanism so as to always follow the program curve, the wiring members that connect the drive circuit and signal processing circuit that exchange signals with the detection head are It is desirable that this does not become a hindrance to the movement of the head.

This invention focuses on these points, and includes the following:
This will be explained in detail using drawings.

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a side view □ thereof.

In the drawing, 1 is a drum, 2 is a program sheet wound around the drum 1, 3 is a light emitting element, 4 is a light receiving element, 5 is a base member, 6 is a flexible printed wiring board, 7 is a cover member, 8 9 is an indicator body, and 9 is a brush support body.

The drum 1 is driven to rotate at a constant speed by a drive motor (not shown).

The program sheet 2 is wound around the drum 1, and a program curve is drawn on the program sheet 2 in a color having a brightness different from that of the base material.

The light emitting element 3 illuminates the program sheet 2, and is, for example, a light emitting diode.

The light-receiving element 4 detects the reflected light from the program sheet 2 by the light-emitting element 3 and converts it into an electric signal, and uses, for example, a phototransistor.

The base member 5 has mounting holes 51 and 52 for arranging the light emitting element 3 and the light receiving element 4 while maintaining a predetermined positional relationship so as to efficiently irradiate the program sheet 2 and efficiently detect the reflected light. have.

In this embodiment, the central axes of these mounting holes 51 and 52 are 45
They are provided so as to form an angle of 100 degrees.

This base member 5 can be integrated by molding, for example.

The flexible printed wiring board 6 connects a drive circuit and a signal processing circuit that exchange drive signals and detection signals between the light emitting element 3 and the light receiving element 4, and the light emitting element is connected to one end of the flexible printed wiring board 6. 3 and a connector 61 for connecting to the light receiving element 4, a support part 62 for locking to a housing (not shown) is provided in the middle, and the other end is connected to a predetermined circuit. A connector 63 is provided for this purpose.

The cover member 7 covers the base member 5 so as to cover the light emitting element 3, the light receiving element 4, and one end of the flexible printed wiring board 6.
It can be attached to.

This cover member 7 is provided with through holes 71 and 72 through which a support shaft (not shown) is inserted.

This cover member 7 can also be integrated by, for example, a molded bottom shape.

Furthermore, by using a molding material suitable for the bearing member, it is possible to integrally mold the bearing including the bearing portion, and the number of parts can be reduced.

The indicator 8 indicates the position of the detection head, that is, the position of the program curve, and is attached to the tip of the base member 5.

The brush support 9 supports the brush support BU so as to slide on the slip resistor SR constituting the servo mechanism, and is attached to the upper surface of the cover member 7.

When assembling these components into a detection head, the light emitting element 3 and the light receiving element 4 are inserted and fixed into predetermined mounting holes 51 and 52 of the base member 5, respectively.

Here, the mounting holes 51 and 52 are provided in a predetermined positional relationship so that they can operate efficiently even if there are variations in the light emitting element 3 and the light receiving element 4, so the man-hours for assembly, adjustment, etc. are greatly reduced. can be reduced to

After that, the connector 61 at one end of the flexible printed wiring board 6
is attached to the lead wires of the light emitting element 3 and the light receiving element 4.

Then, the cover member 7 is attached so as to cover the base member 5.

Accordingly, since the wiring member to the detection head has appropriate elasticity, the wiring member does not become a hindrance when moving the detection head, and the number of man-hours for wiring work can be significantly reduced.

As explained above, according to the present invention, it is possible to realize an optical detection head for a program setter that has a relatively simple structure and is easy to assemble, wire, adjust, etc., and has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a side view thereof. DESCRIPTION OF SYMBOLS 1...Drum, 2...Program sheet, 3...Light emitting element, 4...Light receiving element, 5...Base member, 6 ...Flexible printed wiring board, 7...Cover member, 8...
...Indicator body, 9...Brush support body, SR...
...Slip resistor, BU...Brush unit.

Claims (1)

[Scope of utility model registration request] An optical detection head for a program setting device that has a function of optically detecting a program curve drawn on a program sheet and is movably arranged on the program sheet, the head comprising a light emitting element that illuminates the program sheet, and a light emitting element. a base member having a mounting hole for arranging the light emitting element and the light receiving element while maintaining a predetermined positional relationship; A flexible printed wiring board for electrically connecting a light receiving element and a predetermined circuit, and a cover attached to a base member so as to cover the light emitting element, the light receiving element and one end of the flexible printed wiring board. Optical detection head for program setting device including parts.