JPH0877087A - Communication device - Google Patents

Abstract

PURPOSE: To prevent a light leak from a light emitting element from being detected by a light receiving element undesirably by optically shielding the light emitting element and light receiving element which are arranged successively by a light shield member. CONSTITUTION: An electronic pocketbook has a main body case consisting of an upper case and a lower case where various electronic components are stored and is equipped with a communication device at the front end of the main body case, and the communication device consists of the light emitting element such as an infrared light emitting diode and the light receiving element 13 which uses a photodiode, etc., as an infrared sensor. Then the light shield member 14 is provided between the pair of the light emitting element and light receiving element 13 which are arranged side by side. The light shield member 14 is provided at right angles to a substrate 11 to prevent the light emitting element and light receiving element 13 from being affected by light from the opposite elements. The light emitting element and light receiving element 13 are covered with a visible-light cutting translucent filter 10 from outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device.

[0002]

2. Description of the Related Art In recent years, in electronic notebooks and electronic game machines as portable and convenient small electronic terminals, by transmitting and receiving infrared signals between a plurality of machines other than the original purpose of use, illustration data, game data, etc. We are seeing the spread of models that can exchange information by communication. In such a portable small electronic device, a light emitting element such as a diode (LED) that emits infrared light is used for most of the transmission, and a light receiving element such as a photodiode or a phototransistor is used for reception. In many of such devices, a pair of a light emitting element and a light receiving element is generally provided adjacent to the front end of the device in order to reduce the size and weight.

[0003]

By the way, when the light emitting element and the light receiving element are arranged adjacent to each other as described above, the following adverse effects may occur. That is, the light emitting element and the light receiving element are provided electrically connected to each other on the circuit board, but the infrared light from the light emitting element and the infrared light transmitted through the board are defective because the boundary part between both parts is mechanically defective. There is a case where the light leakage of the light is unintentionally detected by the light receiving element. An object of the present invention is to provide a communication device capable of preventing light leakage such as an infrared light emission signal from being unintentionally detected by a light receiving element.

[0004]

In order to achieve the above-mentioned object, a communication device according to the present invention comprises a body case containing electronic parts, and a pair of a light emitting element and a light receiving element arranged in parallel at one end of the body case. And a light-shielding member that is provided in the main body case and optically shields the light-emitting element and the light-receiving element. In the present invention, when the main body case is composed of the upper case and the lower case fixed to each other, the light shielding member can be provided in either the upper case or the lower case. Further, according to the present invention, the light emitting element and the light receiving element can be arranged in parallel on one substrate provided in the main body case. Further, according to the present invention, the light receiving element can be provided on the substrate at a position one step higher than the light emitting element via the spacer. Further, according to the present invention, it is possible to provide a positioning means for positioning the substrate at a predetermined position of the main body case. Further, according to the present invention, the light emitting element and the light receiving element can be covered with a visible light blocking filter from the outside.

[0005]

Since the light emitting element and the light receiving element arranged in parallel are optically shielded by the light shielding member, it is possible to prevent the light receiving element from inadvertently detecting light leakage from the light emitting element. When the main body case is composed of an upper case and a lower case in consideration of molding and parts assembly convenience, the light shielding member is integrally formed on either one of the upper case and the lower case to provide The light blocking member may serve as a positioning function during assembly. Further, by providing the light receiving element on the substrate at a position one step higher than the light emitting element via a spacer, the spacer prevents the light receiving element from unintentionally detecting light emitted from the light emitting element or light emitted through the substrate. It can be blocked and prevented. Further, by providing a positioning means for positioning the board at a predetermined position of the main body case,
Board mounting work becomes easy. Furthermore, if the visible light blocking filter that covers the light emitting element and the light receiving element is formed in a saddle shape so as to extend over the upper case and the lower case, it can also serve as a connecting member for the upper and lower cases, and from the case seam. To prevent the outside light from entering.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a communication device according to the present invention will be described below with reference to the drawings. 1 and 2 show a portable electronic small notebook as an example of mounting a communication device. This electronic notebook has a main body case composed of an upper case 1 and a lower case 2 in which various electronic parts are stored, and a communication device is provided at the front end of the main body case. The communication device includes a light emitting element 12 such as an infrared light emitting diode (LED).
And a light receiving element 13 using a photodiode, a phototransistor or the like as an infrared sensor (FIG. 8). Then, as shown in FIG. 4 and subsequent figures, a light-shielding member 14 of a main part according to the present invention is provided between a pair of light emitting element 12 and light receiving element 13 arranged adjacent to each other.

As shown in FIGS. 3 to 5 showing the respective cross-sections along the arrows AA, BB, and CC in FIG. 1 in order, and FIG. 6 showing the inner surface of the upper case 1, as shown in FIG. The communication device provided at the front end of the device has a pair of the light emitting element 12 and the light receiving element 13 which are adjacent to each other as described above, and these elements are covered from the outside by the semitransparent filters 10 and 10 for blocking visible light. There is. As shown in FIGS. 2 and 5, the filter 10 is formed into a saddle shape having a size and shape so as to straddle the upper and lower cases 1 and 2 so as to serve as a stopper when the upper and lower cases 1 and 2 are assembled. In addition, since the joint seam 7 of the upper and lower cases 1 and 2 can be completely covered, it is possible to prevent external visible light rays from entering the case through this seam. Further, as shown in FIGS. 6 and 8, a substrate 11 having a length extending over the left and right filters 10 and 10 is arranged, and the light emitting element 12 and the light receiving element 13 are electrically connected to the substrate 11. Is provided. The board 11 is held by brackets 20 and 21 integrally formed on the inner surface of the upper case 1 (FIG. 6).

Further, the upper case 1 is provided with a lid cover 3 which can be freely opened, so that the lid cover 3 can be stored when not in use.
A keyboard in which various information input keys such as a display unit 4 by a liquid crystal display (LCD) arrayed on the front surface and a document creation input key 6 including an on / off switch key 5 are arranged by closing with Etc. can be protected.

Here, in such a communication device, the light emitting element 12 and the light receiving element 13 are isolated from each other, and the light shielding member 14 is integrally formed on the inner surface of the upper case 1 side. The light shielding member 14 is provided so as to be perpendicular to the substrate 11, and the light shielding element 14 prevents the light emitting element 12 and the light receiving element 13 from being affected by light from each other. Although the light shielding member 14 is provided on the upper case 1 side in this embodiment, it may be provided on the lower case 2 side without any inconvenience. 10 shows the light shielding member 14 in a partial view of the upper case 1 as viewed from the inner surface, and FIG. 11 shows the light shielding member 1 shown in a sectional view taken along the line DD in FIG.
It is 4. By devising the shape of the light shielding member 14, it can be used for convenient abutting alignment when assembling the upper and lower cases 1 and 2. As shown in the figure, at the front end of the upper case 1, there are provided recesses 18 and 18 that serve as housing spaces for the light emitting element 12 and the light receiving element 13, respectively, and both recesses are covered with filters 10 and 10 from the outside. 12-
Also in the lower case 2 shown in FIG. 14, the element-accommodating recesses 19 and 19 to be held in the recesses 18 and 18 on the upper case 1 side.
Is provided.

FIG. 9 is an exploded view of the light receiving element 13 functioning as an infrared sensor and the peripheral mounting portion. The light receiving element 13 is a spacer 15 which is also the essence of the present invention.
It is fixed on the substrate 11 with the intervening element and is provided at a position higher than the light emitting element 12. For the substrate 11, the light receiving element 13 and the spacer 15 are double-sided adhesive tape 16
Etc. can be used for mounting. The light receiving element 13 is electrically connected to the substrate 11 by a lead wire 17,
A circuit board 1 such as an LSI shown in FIG.
8 is connected. The spacer 15 is interposed between the light receiving element 13 and the substrate 11 to be provided at a higher position than the light emitting element 12 means that infrared light emitted from the light emitting element 12 or this light emission passes through the substrate 11 and is received by the light receiving element. I accidentally entered 13
This is to prevent it from being detected.

In the embodiment using the small electronic notebook, as shown in FIG. 1, the upper case 1 may be used to provide a speaker notification sound hole 23 for emitting various notification sounds such as an alarm. Further, the backup battery 24 for the IC memory is also stored in the lower case 2. As an actual usage example, if infrared light is radiated to a reflector that moves in front of the light emitting element 12 and the light receiving element 13 so as to cross each other, and the reflected infrared light is received and detected by the light receiving element 13, a reflection type A function such as a photo sensor can be used to change the image on the liquid crystal display unit 4 provided in the electronic notebook, thereby enhancing interest and preference.

[0012]

As described above, according to the communication device of the present invention, the structure for cutting off light leakage such as infrared light to the light receiving element is detected, so that undesired light is detected. Can be prevented.

[Brief description of drawings]

FIG. 1 is an external plan view of a small electronic notebook shown as an example of a communication device mounting example according to the present invention.

FIG. 2 is a side view of the small electronic notebook according to the embodiment.

3 is a vertical cross-sectional view of the main body case taken along the line AA in FIG.

FIG. 4 is a vertical cross-sectional view of the main body case taken along the line BB of FIG.

5 is a vertical cross-sectional view of the main body case taken along the line C-C in FIG.

FIG. 6 is a plan view showing various electronic components arranged in the upper case of the small electronic notebook according to the embodiment.

FIG. 7 is a front view showing a filter in the light emitting element and the light receiving element of the embodiment.

FIG. 8 is a front view showing a light emitting element and a light receiving element on a substrate of an example.

FIG. 9 is an exploded view of a light receiving element and a peripheral structure of the embodiment.

FIG. 10 is a partial plan view showing a light shielding member in the upper case of the embodiment.

11 is a front view of the light shielding member of the embodiment along the line DD in FIG.

FIG. 12 is a plan view of the lower case of the embodiment seen from the inside.

FIG. 13 is a partial plan view of the lower case of the embodiment as seen from the inside.

14 is a side sectional view of the lower case of the embodiment taken along the line EE of FIG.

[Explanation of symbols]

 1 Upper Case 2 Lower Case 10 Visible Light Blocking Filter 11 Substrate 12 Light-Emitting Element 13 Light-Receiving Element 14 Light-Shielding Member 5 Spacer 8 LSI Circuit Board

Claims (6)

[Claims] 1. A main body case containing an electronic component, a pair of a light emitting element and a light receiving element arranged in parallel at one end of the main body case, and an optical element and a light receiving element provided on the main body case for optically connecting the light emitting element and the light receiving element. A communication device, comprising: 2. The communication according to claim 1, wherein the main body case includes an upper case and a lower case fixed to each other, and the light shielding member is provided in one of the upper case and the lower case. apparatus. 3. The communication device according to claim 1, wherein the main body case is provided with one substrate, and the light emitting element and the light receiving element are arranged in parallel on the one substrate. 4. The communication device according to claim 3, wherein the light receiving element is provided on the substrate at a position higher than the light emitting element by a spacer. 5. The communication device according to claim 3, wherein the main body case is provided with a positioning means for positioning the substrate at a predetermined position of the main body case. 6. The communication device according to claim 1, wherein the light emitting element and the light receiving element are covered with a visible light blocking filter from the outside.