JPH0243052Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an optical switch device that opens and closes an electric circuit by blocking or opening an optical path between a pair of light emitting elements and a light receiving element. It is related to.

[Conventional technology]

Conventionally, the above-mentioned optical switch device has been provided with a plurality of pairs of light emitting elements and light receiving elements, and by selectively blocking or opening the optical path between each pair, the electric circuit can be selectively opened and closed. be.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional multiple optical switch device, the light emitting element and the light receiving element whose optical path is interrupted are likely to malfunction due to the influence of ambient light or the influence of light emission from an adjacent pair of elements, and There was also a problem that the opening and closing operations tended to be inaccurate.

This invention was made in view of the above points,
It is an object of the present invention to provide a multiple optical switch device that does not cause malfunctions due to external light, etc., and allows accurate and easy circuit opening/closing operations.

[Means for solving problems]

Means for solving the above problems will be explained with reference to drawings corresponding to embodiments.

That is, the present invention provides an optical switch device that opens and closes an electric circuit by blocking or opening an optical path between a pair of light emitting elements and a light receiving element. A plurality of pairs of light emitting elements and light receiving elements are disposed at predetermined intervals in the longitudinal direction on both sides of the groove 11a, with the pair of light emitting elements and light receiving elements facing each other, and the plurality of pairs of light emitting elements and light receiving elements are disposed at predetermined intervals in the longitudinal direction. Notches 22a, 22 are provided at portions corresponding to the respective elements on the opposing inner surfaces of the printed circuit boards 21, 21' to which the respective elements are attached.
Partition plates 22, 22' having a diameter a' are attached, and transparent plates 23, 2 are provided on the opposing inner surfaces of the partition plates 22, 22'.
3' is attached, and the upper surface of the switch frame 1 is provided with the groove 11a.
A switch cover 5 having a slit-shaped sliding hole 5a that opens upward along the groove 11a is provided at a position directly above the groove 11a. A slidable slide piece 3 is provided along the upper surface, and the slide piece 3
A knob piece 32 protruding from the sliding hole 5a of the switch cover 5 is provided on the upper surface, and a blocking plate is provided on the lower surface of the slide piece 3 to be inserted between each pair of light emitting element and light receiving element. 33 protrudes from the side wall of the slide piece 3, and an opening is formed in the inner wall surface of the switch cover 5 corresponding to the arrangement position of each pair of light emitting element and light receiving element when the slide piece 3 slides. A click roller 35 is provided which engages with the click hole 5a of the switch cover 5, and the slide hole 5a of the inner surface of the switch cover 5
A shielding band 4 made of a band plate with only both ends fixed is stretched at a position that shields the lower surface of the slide piece 3, and the middle part of the shielding band 4 is attached to the slide piece 3 in a direction parallel to the sliding direction thereof. The optical switch device is characterized in that it is inserted into a slot 31a formed through the optical switch device.

〔Example〕

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 1 is an exploded perspective view showing a shielding structure of an optical switch device according to the present invention, and FIG. 2 is a partially assembled view thereof.

The optical switch device according to the present invention includes a switch frame 1, a laminate plate 2, a slide piece 3, a shielding band 4, and a switch cover 5.

The switch frame 1 has a groove 11a that guides the sliding of a blocking plate 33 provided on a slide piece 3, and a laminated plate 2.
In order to form a side wall 11b for attaching, a column 11 having a substantially concave cross section is integrated with side plates 12 provided at both ends thereof. A small cylindrical projection 12a for installing the shielding band 4 is provided on the outside of the side plate 12, and a hole 11c for taking out the terminal 25 is provided at the bottom of the groove 11a.

Next, the laminated plates 2 and 2' are used to attach a pair of light emitting elements and light receiving elements that serve as switches, and are attached to printed circuit boards 21 and 21 as shown in FIG.
It has a three-layer structure consisting of a partition plate 22, 22' and a transparent plate 23, 23', and there are two types: one for attaching a light emitting element and one for attaching a light receiving element.

This printed circuit board 21, 21' partition plate 22, 2
2' transparent plates 23, 23' are made of plastic members having the same length and width, and are connected to the printed circuit board 2.
Terminal 2 from electrodes 24, 24' formed on Terminal 1
5 and 25' are drawn out, and a light emitting element 26 or a light receiving element 27 is bonded between the electrodes. Also, the partition plates 22, 22'
are formed in a comb-like shape, and the notches 22a, 22a'
The light-emitting element 26 or the light-receiving element 27 is located at. Here, the partition plates 22, 22' are for preventing interference of light from adjacent light emitting elements, and the transparent plates 23, 23' are for preventing interference of light from adjacent light emitting elements.
This is to protect 1' from external impact and dust adhesion.

In the embodiment, a light emitting diode is used as the light emitting element 26, and a phototransistor is used as the light receiving element 27, but the present invention is not limited thereto. Further, a specific example of a circuit diagram of a printed circuit board is shown in FIG.

Next, the slide piece 3 has a slide body 31 having a substantially rectangular parallelepiped shape, with a knob piece 32 protruding from the top surface, and a blocking plate 33 made of a flat plate from the bottom surface. A slot 31a is formed on the upper surface of the slide body along the sliding direction of the slide piece at the boundary between the protruding knob piece 32 and the slide body 31,
The shielding band 4 is pushed through the slot 31a.

Also, a blind hole 31 is provided on the side of the slide body 31.
b, a spring 34 is loaded into the blind hole 31b, and a click roller 35 is placed on the head of the spring 34. This click roller 35 has the role of smoothing the movement of the slide switch by the biasing force of the spring, and sequentially stopping the blocking plate 33 at a position just right for blocking light between the light emitting element 26 and the light receiving element 27. The switch is designed to stop temporarily each time it comes into contact with a rectangular click hole 5b provided in the switch cover 5.

Next, the shielding band 4 is made of a flexible band-shaped member, and preferably has some degree of durability, such as a copper plate, and the thinner the thickness, the better the result. Locking holes 4 are provided at both ends of this shielding band 4.
A is provided, and the shielding band 4 is constructed between the side plates 12 by locking the protrusion 13 protruding from the side plate 12 of the slide frame 1 and melting and fixing the protrusion 13 with a trowel. In this case, it is preferable to construct the structure with a very small amount of slack.

Next, the switch cover 5 is composed of a thin metal plate having an abbreviated cross section. A sliding hole 5a for protruding the knob piece 32 is formed along the longitudinal direction on the upper surface of the switch cover 5, and click holes 5b are provided in parallel at regular intervals on the side surface. .

The switch frame 1, laminate plate 2, slide piece 3, shielding band 4, and switch cover 5 configured in this way
When assembled in sequence, the shielding band 4 is stretched in parallel under the sliding hole 5a of the switch cover 5 so as to cover the sliding hole 5a. Moreover, the shielding plate 33 provided on the slide piece 3 is connected to the switch frame 1.
The shielding plate 33 is sandwiched between grooves 11a formed in the groove 11a and is slidable using the sliding hole 5a and the groove 11a as guides, and the shielding plate 33 blocks light between a specific light emitting element and a light receiving element. Become.

[Effect of idea]

As explained above, according to the multiple optical switch device according to the present invention, since the inner surface of the opening of the sliding hole 5a of the switch cover 5 is always covered by the shielding band 4, it is not affected by ambient light. Therefore, the optical switch will not malfunction.

Furthermore, by sliding the slide piece 3, the optical paths between the plurality of pairs of light emitting elements and light receiving elements are sequentially blocked by the blocking plate 33, and the circuit is opened and closed.
Its position is the click hole 5a of the click roller 35.
It is clearly recognized and the operation is accurate.

Further, the outer periphery of each pair of adjacent light emitting elements and light receiving elements is the cutout part 22a, 2 of the partition plate 22, 22'.
2a', there is no light interference between adjacent elements, and there is no risk of malfunction due to this.

In addition, transparent plates 23, 23' are provided on the inner surface of each partition plate.
is attached, and the shielding plate 3 of the slide piece 3 is inserted between them.
Since the slide piece 3 is slidable, each element is protected and the sliding operation of the slide piece 3 becomes easy.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the slide hole shielding structure of the present invention, Fig. 2 is a partially assembled view thereof, Fig. 3 is an exploded perspective view of the laminate, and Fig. 4 is a circuit diagram of the printed circuit board. . DESCRIPTION OF SYMBOLS 1... Switch mount, 2... Laminate board, 3... Slide piece, 4... Shielding band, 5... Switch cover, 21, 21'... Printed circuit board, 22, 22
'...Partition plate, 23, 23'...Transparent plate, 31a
...Slot hole, 5a...Sliding hole.

Claims (1)

[Claims for Utility Model Registration] In an optical switch device that opens and closes an electric circuit by blocking or opening an optical path between a pair of light emitting elements and a light receiving element, A plurality of pairs of light-emitting elements and light-receiving elements are disposed at predetermined intervals in the longitudinal direction, with the pair of light-emitting elements and light-receiving elements facing each other on both sides of the groove 11a formed in the same direction, and the plurality of pairs of light-emitting elements On the opposing inner surfaces of the printed circuit boards 21, 21' to which the respective elements of the light-receiving element are attached, cutouts 22a, 22 are provided at portions corresponding to the respective elements.
Partition plates 22, 22' having a diameter a' are attached, and transparent plates 23, 2
3' is attached, and the upper surface of the switch frame 1 has the groove 11a.
A switch cover 5 having a slit-shaped sliding hole 5a that opens upward along the groove 11a is provided at a position directly above the groove 11a of the switch frame 1. A slidable slide piece 3 is provided along the upper surface, and the slide piece 3
A knob piece 32 protruding from the sliding hole 5a of the switch cover 5 is provided on the upper surface, and a blocking plate is provided on the lower surface of the slide piece 3 to be inserted between each pair of light emitting element and light receiving element. 33 protrudes from the side wall of the slide piece 3, and an opening is formed in the inner wall surface of the switch cover 5 corresponding to the arrangement position of each pair of light emitting element and light receiving element when the slide piece 3 slides. A click roller 35 is provided which engages with the click hole 5a of the switch cover 5, and the slide hole 5a of the inner surface of the switch cover 5
A shielding band 4 made of a band plate with only both ends fixed is stretched at a position that shields the lower surface of the slide piece 3, and the middle part of the shielding band 4 is attached to the slide piece 3 in a direction parallel to its sliding direction. An optical switch device characterized in that it is inserted into a slot 31a formed therethrough.