JPS63291239A - Magneto-optical composite head - Google Patents

Abstract

PURPOSE:To uniformize the quality of a magneto-optical composite head, by setting the guide position of an optical fiber by drawing out the bundle of an optical fiber to the outside through the guide of a holder. CONSTITUTION:A magnetic head main body 1 is constituted of two magnetic cores 8 and an optical transmission body 3, and coils 9 are wound across the magnetic cores 8, and the optical transmission body 3 is arranged in a gap 2. The holder 7 on which a hole to pass through the bundle of the optical fiber 4 and a groove, etc., are formed is provided outside the magnetic head main body 1. The holder 7 is molded with a non-magnetic material such as 'Noryl(R)' resin, and the guide 6 of elongated hole is formed on the ceiling of the holder 7. Thereby, since the draw out position of the optical fiber 4 can be always set constant by drawing it out along the guide 6, dispersion in the optical loss of the optical fiber 4 can be reduced, then, the characteristic of a product can be uniformized.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a magneto-optical composite head for magnetically and optically identifying banknotes, etc., and more specifically, a magneto-optical composite head for extracting the optical fiber of the composite head to the outside. The present invention relates to a guide mechanism.

(Prior Art) The present applicant previously developed a magneto-optical composite head as shown in FIG. This is to simultaneously read the magnetic pattern and optical pattern drawn on the recording medium F, and the magnetic detection gap 14 of the magnetic sensor 13, in which the coil 12 is wound around the magnetic core 11, is made of a light-transmitting non-magnetic material. Molded light transmitting body (optical member) 15! This optical member 15 is connected to a plurality of optical fibers 16 for reading optical data. Note that 17 in FIG. 4 is a light emitting element, and 18 is a light receiving element.

(Problems with Prior Art) The conventional magneto-optical composite head 19 has the following problems.

(1) Since the routing position when pulling out the optical fiber 16 to the outside is not fixed, the curvature applied to the optical fiber 16 varies from product to product, and the optical loss also varies from product to product.

(2) Conventionally, a light transmitting body 15 to which an optical fiber 16 is connected
The positional adjustment between the magnetic core 11 and the magnetic core 11 is done manually under the condition shown in Fig. 4 while looking through a microscope with a magnification of about 10 times.
It was always difficult for me to adjust the position III.

(Objective of the Invention) The object of the present invention is to determine the routing position of the optical fiber! The objective is to equalize the quality of the pneumatic composite head and improve processability.

(Means for Solving the Problems) As shown in FIG. 1, the magneto-optical composite head of the present invention has a light transmitting member 3 disposed in a gap 2 at the tip of a magnetic head main body l, and a light transmitting member 3 is provided with a light transmitting member 3. The magneto-optical composite head 5 to which the fiber bundle 4 is connected is characterized in that a holder 7 in which a guide 6 such as a hole or groove for passing the optical fiber bundle 4 is formed is provided on the outside of the magnetic head main body l. It is something to do.

(Function of the Invention) In the magneto-optical composite head of the present invention, as shown in FIG. 1, the optical fiber bundle 4 can be pulled out through the guide 6 of the holder 7, so that the routing position of the optical fiber 4 is constant.

(Example) FIG. 1 is an explanatory diagram of a magneto-optical composite head of the present invention.

In the figure, reference numeral 1 denotes a magnetic head main body, which is composed of two magnetic cores 8 and a light transmitting body 3. As shown in FIG. magnetic core 8
A coil 9 is wound around.

A gap 2 is formed between the opposing magnetic cores 8.

3 is a light transmitting body, which is placed inside the gear z.

4 is an optical fiber bundle composed of a plurality of optical fibers.

Reference numeral 6 denotes a guide for drawing out the optical fiber bundle 4 to the outside.

7 is a holder which is a feature of the present invention. This holder 7 is molded from a non-magnetic material such as Noryl resin.

A long hole guide 6 is formed in the ceiling of the holder 7.

Various shapes and structures are possible for the guide 6. The guide 6 shown in FIG. The guide 6 at the opening in the figure has a rectangular shape and opens at the side surface 10 of the holder 7. The guide 6 shown in the figure is dovetail-shaped and opens at the side surface 10 of the holder 7. The guide 6 can also open into the left and right sides 20, 21 of the holder 7 in FIG.

(Effects of the Invention) The magneto-optical composite head of the present invention has the following effects.

(1) When the optical fiber 4 is pulled out along the guide 6, the pulling position is always constant, so variations in optical loss of the optical fiber 4 are reduced, and the characteristics of the product are made uniform.

(2) Adjustment of the position W1 between the light transmitting body 3 and the magnetic core 1 becomes easy, and workability is improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the magneto-optical composite head of the present invention, FIG. 2 is an exploded view of the head, FIGS. 3A to 3C are explanatory diagrams showing various examples of holders in the head, and FIG. 1 is a perspective view showing an example of a conventional magneto-optic composite head. 1 is the magnetic head main body 2 is a gear, 3 is a light transmitting body 4 is an optical fiber bundle 5 is a magneto-optical composite head 6, and a guide 7 is a holder.

Claims (1)

[Claims] In a magneto-optical composite head 5, a light transmitting body 3 is disposed in a gap 2 at the tip of a magnetic head body 1, and an optical fiber bundle 4 is connected to this light transmitting body 3.
A guide 6 such as a hole or groove for passing the optical fiber bundle 4 is provided on the outside of the
1. A magneto-optical composite head comprising a holder 7 having a holder 7 formed thereon.