JPH0410701Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a photo sensor that can receive and detect an object to be detected entering from a predetermined direction with an actuator section.

<Prior Art> As shown in the perspective view of FIG. 5, the photo sensor is composed of an actuator frame 3 and a sensor section 4, and the operating section 31 is arranged parallel to the direction of intrusion of the object to be detected. The actuator frame 3 is attached, and the recess 41 is made to correspond to the shielding plate 32 of the actuator frame 3.
The so-called actuator frame 3 to which the
The photo sensor is formed by incorporating the photo sensor and the sensor section 4 into equipment such as a fax machine, a copying machine, a belt conveyor, and the like.

<Problems to be Solved by the Invention> In the photo sensor having the above configuration, the object to be detected must always enter from a fixed direction, and failures such as paper jams may occur if the object to be detected enters in a different direction. For this reason, it is necessary to accurately position the detection object in each direction of intrusion in accordance with each built-in device, and accurate installation work is required during assembly and adjustment.

<Means for Solving the Problems> The present invention was devised to solve the above problems, and consists of a sensor body in which a light-emitting element and a light-receiving element are housed across a gap, and an object to be detected. In a photo sensor comprising an actuator unit that rotates a shielding plate disposed in a gap by contact with a movable plate, contact between the movable plate and an object to be detected that enters the movable plate from the shielding plate side, or the above-mentioned When the movable plate comes into contact with an object to be detected that enters in a direction substantially parallel to the axis of the shaft, the shielding plate is rotated around the shaft, and the incident light from the light-emitting element is directed to the light-receiving element. The shielding plate is provided substantially perpendicular to a shaft portion supported by the sensor body, and a movable plate is provided on the opposite side of the shielding plate around the shaft portion, and
The photo sensor is characterized in that the movable plate is a semicircular plate with a semi-arc-shaped edge facing upward, or a triangular plate having sides with a predetermined slope on the left and right with the top as the center.

<Example> Hereinafter, the photo sensor of the present invention will be explained in detail based on the drawings.

FIG. 1 is a perspective view showing the actuator section 1. FIG. This actuator section 1 has a movable plate 11 and a shielding plate 12 that are substantially perpendicular to a shaft section 13 and are mounted on opposite sides of the shaft section 13 . The movable plate 11 is disposed in an entry path through which a thin plate-like object to be detected, such as paper, ribbon, film, wafer, or floppy disk, passes, and comes into contact with the object to be detected.

The shape of the normal operation plate 11 is a sloped shape with an apex upward relative to the direction in which the object to be detected enters the sensor. For example, in the case of a triangle, 2 sides are 1
1a and 11b are formed to have a certain slope with respect to the axial direction of the shaft 13, and in the case of a semicircular shape, the semicircular edge is formed upward.

The shielding plate 12 has a so-called plate shape, and rotates around support shafts 13a and 13b provided at both ends of the shaft portion 13 when an object to be detected comes into contact with the movable plate 11 described above.

On the other hand, as shown in the perspective view of FIG. 2, the sensor body 2 has a light emitting element 22 and a light receiving element 23 integrally housed in an exterior body 21 with a cavity 24 in between.

Normally, inside the box body 21, there is a light emitting element 22 and a light receiving element 2.
3 are formed, and both elements 22 and 23 are formed.
The device is housed in the arrangement portion and is integrally built in by molding with resin or the like or sealing it with a bottom plate or the like. Furthermore, as described above, within the cavity 24 where the light emitting element 22 and the light receiving element 23 face each other, the shielding plate 12 is arranged so as to block the incident light from the light emitting element 22. Furthermore, the support shaft 13 of the actuator section 1 is provided on the upper surface of the exterior body 21.
Bearings 25a, 25 for fitting and supporting a, 13b
b is provided.

In such a photo sensor, as shown in the perspective view of FIG.
a is fitted into the bearing 25a of the sensor main body 2, and the other support shaft 13b is fitted into the bearing 25b to make the actuator part 1 rotatable around its shaft part 13. Further, in this state, the shielding plate 12 is biased by the coil spring V so that it is housed in the cavity 24. That is, the light emitting element 22 and the light receiving element 2
Shield between 3. As shown in the perspective view of FIG. 4, when an object to be detected enters from, for example, the X direction, the movable plate 11 itself has a sloped shape with its apex upward relative to the direction of intrusion. The object to be detected comes into contact with the movable plate 11 and moves smoothly in the X direction. During this contact, the shielding plate 12 rotates about the shaft portion 13 in the direction of the arrow (see FIG. 4) to release the shielding state between the light emitting element 22 and the light receiving element 23. That is, if an object to be detected enters from the X direction orthogonal to the shaft portion 13 and comes into contact with the movable plate 11, a signal is sent from the light emitting element 22 to the light receiving element 23, thereby detecting the intrusion of the object. Furthermore, even when the object to be detected enters from the Y direction or the Z direction, which is substantially parallel to the axis of the shaft portion 13, the detection function in each direction can be maintained by bringing the object into contact with the movable plate 11.

<Effects of the invention> As described above, the photo sensor according to the invention has a light emitting element and a light receiving element integrally built into the sensor body, and the movable plate itself of the actuator section is formed in a triangular or semicircular shape. Therefore, even objects to be detected whose intrusion directions are slightly different can be smoothly brought into contact and moved in a predetermined direction, so there is no need for fine adjustment in accordance with the intrusion direction of the object to be detected.

Therefore, if the photo sensor of the present invention is used, the design, manufacturing inspection, etc. will be simplified and shortened, and furthermore, the installation into equipment will be extremely simple.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the actuator section, Fig. 2 is a perspective view showing the sensor body, and Fig. 3 is a perspective view showing the actuator section.
FIG. 4 is a perspective view showing the photo sensor in a movable state, and FIG. 5 is a perspective view showing the configuration of a conventional photo sensor. 1... Actuator section, 11... Movable plate, 1
2... Shielding plate, 13... Shaft portion, 2... Sensor body, 21... Exterior body, 22... Light emitting element, 23...
...Light receiving element, 24...Gap, 25a, 25b...
…bearing.

Claims (1)

[Claims for Utility Model Registration] A sensor body in which a light-emitting element and a light-receiving element are opposed to each other across a gap, and a detection object rotates a shielding plate disposed in the gap by contacting the movable plate with the object to be detected. In a photo sensor consisting of an actuator section that moves, an object to be detected that enters from the shielding plate side to the moving plate side comes into contact with the moving plate, or an object to be detected that enters in a direction substantially parallel to the axis of the shaft section. and the movable plate rotate the shielding plate around the shaft portion to allow the incident light from the light emitting element to enter the light receiving element, and the shielding plate is attached to the sensor body. A movable plate is provided approximately perpendicularly to a shaft portion to be supported, and a movable plate is provided on the opposite side of the shielding plate with the shaft portion as the center, and the movable plate has a semi-arc shaped edge facing upward. A photo sensor comprising a semicircular plate or a triangular plate having sides with a predetermined slope on the left and right with the top as the center.