JPS647349Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a photointerrupter comprising a light receiving element and a light emitting element.

2. Description of the Related Art In recent years, photo interrupters capable of detecting the position of objects have been installed in various places on manufacturing factory lines and the like, and are used for detecting the position of objects.

A conventional photo interrupter will be explained below with reference to FIG.

In FIG. 1, reference numeral 1 denotes a U-shaped support with a space provided in the middle, and a light emitting element 2 and a light receiving element 3 are provided at opposing positions across the space.

The photointerrupter configured as described above can detect the presence of the object 4 because when the object 4 exists in the spatial region, the light beam from the light emitting element 2 is blocked by the object 4.

However, with this configuration, there is a problem in that malfunctions occur due to outside light, dust, etc. entering the spatial area. Furthermore, since oil and the like are used in factories, if oil accidentally drips onto the light emitting element 2 and the light receiving element 3, the oil may drop if the space between the light emitting element 2 and the light receiving element 3 is narrow. could not be wiped off, which significantly degraded the performance of the photo interrupter.

In view of the above drawbacks, the present invention provides a photointerrupter that prevents malfunctions and significantly improves performance by covering the light emitting element and the light receiving element with a cover.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view of a photo interrupter in one embodiment of the present invention. In the figure, reference numeral 1 denotes a U-shaped support with a space provided in the middle, and a light emitting element 2 and a light receiving element 3 are provided at opposing positions across the space. 5 is a hollow cover formed of rubber that covers the support 1;
A notch 5a is provided on the side surface and the top surface in accordance with the space area between the light emitting element 2 and the light receiving element 3.

The photo interrupter configured as described above has the notch 5a provided in the cover 5, so that when the object 4 passes through the space between the light emitting element 2 and the light receiving element 3, the passage of the object 4 is prevented. There is no need to prevent it. In addition, the cover 5 completely isolates the light emitting element 2 and the light receiving element 3 from the outside.
It can prevent outside light and dust from entering, and even if sticky liquid such as oil is accidentally dripped, the sticky liquid will not adhere to the light emitting element 2 or the light receiving element 3. It can be prevented.

As described above, according to this embodiment, the notch 5a
By surrounding the support 1 with the cover 5 provided with the Even if a sticky liquid is accidentally dripped, the sticky liquid can be prevented from adhering to the light emitting element 2 and the light receiving element 3.

In this embodiment, the cover 5 is made of rubber, but only the area around the notch 5a has elasticity, and the cover 5 may be made of other elastic materials such as resin, etc., instead of rubber. It's okay to be hot.

As described above, the present invention covers the light emitting element and the light receiving element with a cover cut in accordance with the spatial area between the light emitting element and the light receiving element.
It can prevent malfunctions caused by external light or dust, and even if sticky liquid such as oil is accidentally dropped, it prevents the sticky liquid from adhering to the light emitting element or light receiving element. The practical effects are great.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional photo interrupter.
FIG. 2 is a perspective view of a photo interrupter in one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Support body, 2... Light emitting element, 3... Light receiving element, 5... Cover.

Claims (1)

[Claims for Utility Model Registration] (1) A light-emitting element, a light-receiving element provided to face the light-emitting element with a fixed interval, and a light-emitting element that covers the light-emitting element and the light-receiving element; and a cover having at least an elastic notch between the light receiving element and the light receiving element. (2) The light-emitting element and the light-receiving element are supported by a U-shaped support body so as to face each other with a certain spatial area in between, and the support body is made of elastic material having a cutout corresponding to the spatial area and a cavity. 1. A photo interrupter according to claim 1, which is covered with a cover having a cover.