JPH0681027U - Photoelectric switch device - Google Patents

Abstract

(57) [Abstract] [Purpose] For example, improvement of photoelectric switch devices used in automobiles. [Structure] A front panel on which a transparent soft material is formed is arranged on an optical path formed by a light emitting element and a light receiving element. [Effect] The degree of freedom in the appearance of the photoelectric switch device can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a photoelectric switch device used in a touch input system for an automobile, for example.

[0002]

[Prior art]

 For example, as a conventional example of a photoelectric switch device used in an automobile touch input system, there is one shown in FIG.

That is, 1 is, for example, a TV monitor for displaying a design, or a flat rectangular display plate which is another compound switch, and the square display plate 1 has a square frame shape with a square bracket on the four sides of the surface. The printed circuit board frame 2 is disposed so as to be parallel to the display board 1. In the square-shaped printed circuit board frame 2, a plurality of light emitting diodes 3a are arranged in a line on two sides that are adjacent to each other, and the light emitting diodes 3a are arranged on two sides that are adjacent to each other. A plurality of phototransistors 3b facing the diode 3a are arranged in a line. The light emitting diode 3a emits an infrared beam having an emission wavelength output peak of 780 nm, and the phototransistor 3b receives the infrared ray having a wavelength of the best light receiving sensitivity in the vicinity of 780 nm. Reference numeral 4 denotes a printed board arranged on the back side of the display board 1, and a detector 5 and a power supply unit 6 are provided on the back surface of the printed board 4.

Reference numeral 7 is a controller for controlling or computing, 8 is a protective cover that protects the light emitting diode 3a and the phototransistor 3b, and has an optical characteristic of transmitting only a specific emission wavelength by the light emitting diode 3a, and 9 is a photoelectric converter. A cable for transmitting and receiving signals and power to and from the element portion, 10 is a view control lens for preventing the surrounding scene from being reflected on the display panel 1, and 11 is a decorative plate located in front of the photoelectric switch device.

Then, by the beam matrix formed by the pair of the light emitting diode 3a and the phototransistor 3b, the intersection point coordinates (X₁ , Y₁ ), (X₂ , Y₂ )… (X _n , Y_n ) Is generated, but when a finger is placed in the beam matrix, the specific beam is blocked, and the blocked coordinate value (X_i , Y_j ) Is detected by the detector 5. (However, 1 ≦ i ≦ n, 1 ≦ j ≦ n)

[0006]

[Problems to be solved by the device]

 However, in such a conventional photoelectric switch device, a certain coordinate of the beam matrix generated on the surface of the display panel 1 is blocked by a finger or the like, so that the blocked position is detected. As a matter of course, the infrared beam emitted from the light emitting diode 3a is diffused by the protective cover 8 and sneaks into the view control lens 10, which causes malfunction of the photoelectric switch or a decrease in operation sensitivity. As a result, the distance between the surface of the view control lens 10 and the light emitting diode 3a and the phototransistor 3b must be set large, and thus the degree of freedom in designing the photoelectric switch device is limited.

[0007]

[Means for Solving the Problems]

 The present invention has been made in view of such a conventional problem, and in a photoelectric switch device which forms a beam matrix by arranging a large number of pairs of light emitting elements and light receiving elements facing each other around the surface of a display board. By arranging a front panel on the surface of the display board, which is formed of a transparent soft material according to the shape of the surrounding area, a flash surface with the surrounding decorative board is provided, which allows photoelectric conversion with high design flexibility. It is to provide a switch.

[0008]

【Example】

 The present invention will be described in detail below with reference to the embodiment shown in FIGS. 2 to 4. The same parts of the structure of the present embodiment and the structure described in the conventional example are designated by the reference numerals described in the conventional example. Then, the description of the same structural portion is omitted.

That is, the present embodiment is characterized in that the front panel 12 is arranged on the front surface (upper surface) of the printed circuit board frame 2.

The front panel 12 is formed by using a transparent soft material made of, for example, transparent silicon rubber, elastomer resin, or the like. Further, the shape is such that the light emitting diodes 3a group and the phototransistor 3b group are inserted, Through holes 12a and 12b for peeking over the control lens 11, and meat for passing the infrared beam 14 emitted from the light emitting diode 3a group through which the through holes 12a, 12b are inserted to the phototransistor 3b group inside. The thick portion 12c is integrally formed.

Therefore, when the front panel 12 is superposed on the printed circuit board frame 2, the thick portion 12c of the front panel 12 is formed between the light emitting diode group 3a and the phototransistor group 3b which are arranged opposite to each other. The structure is located (see Fig. 3).

The structure of this embodiment has been described above. Next, the operation thereof will be described. As shown in FIG. 4, by pressing a predetermined portion of the thick portion 12c of the front panel 12 with a finger 13 or the like, the front panel is pressed. The pressing portion of the light is distorted, and the infrared beam 14 emitted from the light emitting diode 3a is blocked or distorted due to the distortion of the pressing portion, so that the phototransistor 3b cannot receive the light (is shielded). It is possible to detect the coordinate value of the portion where the front panel 12 is pressed. Further, the infrared beam emitted from the light emitting diode 3a is reflected to the display panel 1 side at the distortion portion of the pressing portion of the front panel 12 and is not reflected again to the front panel side by the view control lens 10. , It is possible to prevent malfunction.

Therefore, according to this embodiment, the surface of the display panel 1 is formed between the light emitting diode 3a and the phototransistor 3b which are formed of a transparent soft material so as to match the surrounding shape and are arranged opposite to each other. Since the front panel 12 having the thick portion 12c to be arranged is arranged, according to this, the action of the front panel 12 largely sets the distance between the view control lens 10 and the light emitting diode 3a and the phototransistor 3b. Even if it is done, it becomes possible to form a flush surface with the surrounding decorative plate 11, and the degree of freedom in design can be increased.

[0014]

[Effect of device]

 As described above, the present invention provides a photoelectric switch device that detects a light path blocking position on a display plate by arranging a plurality of pairs of light emitting elements 3a and light receiving elements 3b facing each other around the surface of the display panel 1 so as to face each other. The photoelectric switch device is characterized in that the front panel 12 formed of a transparent soft material is arranged on the optical path on the surface portion of the display plate in accordance with the shape of the surroundings. Even if the distance between the diode 3a and the phototransistor 3b is set to be large, it is possible to form a flush surface with the surrounding decorative plate, and it is possible to increase the degree of freedom in design.

[Brief description of drawings]

FIG. 1 is an exploded view of a conventional photoelectric switch device.

FIG. 2 is an exploded view of a photoelectric switch device according to the present invention.

FIG. 3 is an explanatory view of a sectional structure of a photoelectric switch device according to the present invention.

FIG. 4 is an operation explanatory view of the photoelectric switch device according to the present invention.

[Explanation of symbols]

 12 ... Front panel 12a, 12b ... Through hole 12c ... Thick portion 13 ... Finger 14 ... Infrared beam

Claims (1)

[Scope of utility model registration request] 1. A photoelectric switch device for detecting a light path blocking position on a display plate by arranging a plurality of pairs of light emitting elements (3a) and light receiving elements (3b) facing each other around the surface of the display plate (1). , A front panel (1) formed of a transparent soft material on the optical path in the surface portion of the display plate.
2. A photoelectric switch device characterized in that 2) is arranged.