JPH01299143A - Optical sensor device - Google Patents

Abstract

PURPOSE:To prevent adhesion of dust, refuse, and sheet powder and to enable reduction of the occurrence of disconnection, by a method wherein an optical sensor is surrounded with a printed board and a case, and a power is transmitted and received through a connector mounted to the printed board. CONSTITUTION:When a sheet 33 passes between emission sensor 22A and a collection sensor 22B, light is shut off or damped, and an output from the collection sensor 22B is changed. Thus, from an output from the optical sensor 22B, the position of the sheet 33 can be detected. The optical sensor 22 is surrounded with the printed board 21 and a case 24, and is shut off from the open air. Thus, dust, refuse, and sheet powder are prevented from adhesion to the optical sensor 22. When a relatively high force is exerted on a wire 47, a housing 41 is deformed resiliently, a protrusion 45 is released from lock to a notch part 44, and a housing 42 is separated away from the housing 41. This constitution reduces the possibility to cause the occurrence of disconnection of the wire 47.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical sensor device suitable for use in detecting banknotes, printing paper, etc. conveyed in, for example, cash processing machines, copying machines, etc.

(Prior art) In cash processing machines, copying machines, etc., it is necessary to monitor the position, outer diameter, conveyance speed, etc. of paper sheets such as banknotes and printing paper.For this reason, in these devices, light emitting elements and The light-receiving elements are arranged facing each other at predetermined positions in the middle of the conveyance path.

FIG. 2 shows its configuration. In the figure, reference numeral 1 denotes a printed circuit board, on which a light emitting sensor 2A made of, for example, an LED is soldered and attached. A wire 3 is soldered to the printed circuit board 1, and is connected to the light emitting sensor 2A via a pattern on the printed circuit board 1. 4 is a mounting bracket to which the printed circuit board 1 is fixed with screws. 5 is a cylindrical rubber tube;
It is arranged around the outer periphery of the light emitting sensor 2A.

Reference numeral 6 denotes a conveyance guide, which guides the filter paper sheets 9 to be conveyed. 7 is a hole formed in the conveyance guide 6;
is closed by a transparent glass plate 8.

A similar configuration in which the light emitting sensor 2A is replaced with a light receiving sensor 2B is arranged facing each other so that their optical axes coincide.

The light output from the light emitting sensor 2A is transmitted to the lower glass plate 8.
．． The light is input to the light receiving sensor 2B via a conveyance path formed by two conveyance guides 6 and an upper glass plate 8. When the paper sheets 9 pass through the conveyance path, the light is blocked or attenuated by the paper sheets 9. As a result, the amount of light detected by the light receiving sensor 2B changes as the paper sheet 9 passes.
Paper sheets 9 are detected by monitoring the output of the light receiving sensor 2B.
It is possible to detect the position, external shape, conveyance speed, etc.

The paper sheets 9 are conveyed with dirt, dust, etc. attached thereto. However, since the light emitting sensor 2A and the light receiving sensor 2B are surrounded by the printed circuit board 1, the rubber WJ 5, the conveyance guide 6, and the glass plate 8 and are shielded from the outside air, dirt, dust, paper powder, etc. adhere to these elements. This will be prevented.

[Problem to be solved by the invention]

By the way, in order to reliably isolate the light emitting sensor 2A and the light receiving sensor 2B from the outside air, it is necessary to attach the rubber tube 5 to the mounting bracket 4 so as to be slightly compressed by the conveyance guide 6.

However, as shown in FIG. 3(a), if the rubber cylinder 5 is compressed too much, the printed circuit board 1 will bend due to the repulsive force.
The direction of the optical axis 11 changes, making it difficult for the light receiving sensor 2B to correctly detect the light output by the first light emitting sensor 2A.

Conversely, if the rubber tube 5 is not suppressed, the rubber tube 5 and the conveyance guide 6 (or printed circuit board 1
), a gap 12 is formed between the
Dust, paper powder, etc. may enter the interior and cover the light emitting sensor 2A and the light receiving sensor 2B. In this case, the amount of light output or input decreases, making correct detection difficult.

Furthermore, since the wire 3 is directly soldered to the printed circuit board 1, the workability is not only poor when attaching and detaching the printed circuit board 1 to the mounting bracket 4.

It has the disadvantage of being easily broken under heavy loads.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to realize an optical sensor device that prevents dust and the like from covering light emitting and light receiving sensors, has good assembly workability, and is less likely to cause wire breakage.

[Means to solve the problem]

The optical sensor device of the present invention includes a printed circuit board on which a predetermined pattern is formed, an optical sensor attached to the printed circuit board, and an optical sensor attached to the printed circuit board. a connector connected to the optical sensor via the pattern; and at least a portion thereof has a light-transmitting part that transmits light input and output from the optical sensor, and surrounds the optical sensor together with the printed circuit board. Equipped with a case.

[Effect]

An optical sensor having a light emitting element or a light receiving element is surrounded by a printed circuit board and a case, and is shielded from the outside air.

Further, the connection of the wire for transmitting and receiving electrical signals to and from the optical sensor is performed via a connector.

Therefore, dust is prevented from adhering to the optical sensor, the wires can be easily connected, and the connector comes off when a large external force is applied, reducing the risk of wire breakage.

〔Example〕

FIG. 1 is a perspective view of the optical sensor device of the present invention. In the figure, 21 is a printed circuit board, and the printed circuit board 21
An optical sensor 22 (emission sensor 22A or light reception sensor 22B) and a connector 23 are attached and fixed by soldering or the like.

24 is a case made of transparent synthetic resin or the like, and is attached to the printed circuit board 21. Reference numeral 25 denotes a protrusion formed to protrude from the case 24 in a cylindrical shape, the center of which is aligned with the optical axis of the optical sensor 22.

FIG. 4 is a sectional view showing a state in which the optical sensor device of FIG. 1 is mounted. In FIG. 4, 31 is a conveyance guide, which guides paper sheets 33. 32 is a hole formed in the conveyance guide 31, and the optical sensor device is attached to the conveyance guide 31 by fitting the protrusion 25 into this hole 32.

The light emitting sensor 22A and the light receiving sensor 22B are arranged to face each other so that their front axes coincide.

The connector 23 has housings 41 and 4 made of synthetic resin or the like.
2. The housing 41 is attached to the printed circuit board 21. 43 is a pin on the housing 41 side, which is soldered to a pattern on the printed circuit board 21. 44 is a notch formed in the housing 41.

46 is a receiving part fixed to the housing 42, and a wire 47
is connected. When the housing 42 is inserted into the housing 41, the pin 43 is inserted into the receiving part 46 and connected. When the housing 42 is inserted to a predetermined position, the protrusion 45 of the housing 42 is engaged with the notch 44 of the housing 41, and the housing 42 is lightly locked to the housing 41.

Therefore, the power input from the lower line 47 in Fig. 4 is
The light is supplied to the light emitting sensor 22A via the receiving portion 46, the bottle 43, and the pattern of the printed circuit board 21. This causes the light emitting sensor 22A to generate light.

At least a protruding portion 25 as a transparent portion of the case 24
is considered transparent. Therefore, the light output from the light emitting sensor 22A is input to the light receiving sensor 22B via the protrusion 25 of the optical sensor device disposed at the upper side in FIG. 1 across the conveyance path formed by the conveyance guide 31. The electrical signal photoelectrically converted by the light receiving sensor 22B is transmitted to the pattern of the printed circuit board 21, the bin 43. Receiving part 46
It is output from line 47 via.

When the paper sheet 33 passes between the light emitting sensor 22A and the light receiving sensor 22B, the light is blocked or attenuated, and the output of the light receiving sensor 22B changes.

Therefore, the position of the paper sheet 33, etc. can be detected from the output of the light receiving sensor 22B.

Optical sensor 22 (light emitting sensor 22A, light receiving sensor 22)
is surrounded by the printed circuit board 1 and the case 24, and is isolated from the outside air. Therefore, dirt, dust, paper dust, etc. are prevented from adhering to the optical sensor 22.

When the paper sheet 33 passes, the accompanying wind pressure is applied to the protrusion 25.
It acts on Alternatively, the paper sheet 33 directly contacts the protrusion 25 . Therefore, there is little possibility that dust or the like will accumulate on the protrusion 25.

When a relatively large external force is applied to the wire 47.

The housing 41 is elastically deformed, the projection 45 is released from the notch 44, and the housing 42 is moved to the housing 41.
will be separated from. Therefore #! 47 is less likely to break.

[Effects of the Invention] As described above, according to the present invention, since the optical sensor is surrounded by the printed circuit board and the case, it is possible to prevent dirt, dust, paper powder, etc. from adhering to the optical sensor. In addition, since power is transmitted and received via the connector attached to the printed circuit board, not only is there less risk of wire breakage, but also the attachment and detachment work is easy, making it possible to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the optical sensor device of the present invention, FIGS. 2 and 3 are cross-sectional views of a conventional optical sensor in a mounted state, and FIG. 4 is a cross-sectional view of the optical sensor device of the present invention in a mounted state. be. 1... Printed circuit board 2A... Light emitting sensor 2B... Light receiving sensor 3... Wire 4... Mounting bracket 5... Rubber tube 6... Conveyance guide 7... Hole 8... Glass plate 9... Paper sheets 11... Optical axis 12... Gap 21... Printed circuit board 22... Optical sensor 22A... Light emitting sensor 22B... Light receiving sensor 23... Connector 24 ... Case 25 ... Projection 31 ... Conveyance guide 32 ... Hole 33 ... Paper sheets 41, 42 ... Housing 43 ... Pin 44 ... Notch 45 ... Protrusion 46... Receiving portion 47... Line Patent applicant Oki Electric Industry Co., Ltd.

Claims (1)

[Scope of Claims] A printed circuit board on which a predetermined pattern is formed, an optical sensor attached to the printed circuit board, and a connector attached to the printed circuit board and connected to the optical sensor via the pattern. An optical sensor device comprising: a case that has at least a part thereof a light-transmitting part that transmits light input to and output from the optical sensor, and surrounds the optical sensor together with the printed circuit board.