JP4707611B2 - Waterproof cover structure for electronic equipment - Google Patents

Description

  The present invention relates to a waterproof cover structure in an electronic device such as an optical receiver having a light emitter therein.

  Conventionally, in an electronic device with a built-in electronic circuit, it is easy to check the energized state from the outside, and when the lid is opened for internal inspection and maintenance, the worker is surely recognized as energized. The light emitter is provided in the case body at a position exposed to the opening of the case body, and the lid is provided with a light transmitting portion for confirming the display state of the light emitter from the outside in the closed state. Have been proposed (see, for example, Patent Document 1).

In the thing of this patent document 1, since the transparent part is formed in a lid | cover, a cylinder is attached to the lead wire of a light-emitting body, and the distance from an electric circuit board to a light-emitting part is fixed with a cylinder. By doing so, the position of the light emitter with respect to the lid is made constant.
Japanese Patent Laid-Open No. 06-311117 (paragraphs 0009, 0010 and FIG. 3)

  In the device described in Patent Document 1, since the light emitter is provided so as to be in a fixed positional relationship with respect to the lid using the cylindrical body, the mounting operation of the light emitter is troublesome and the cost is increased. . In addition, since the light-transmitting part is provided on the lid, it is difficult to visually check whether the light-emitting body emits light through the light-transmitting part in the daytime when the surroundings are bright when the light-emitting body does not emit light with a considerably strong intensity. .

  SUMMARY OF THE INVENTION An object of the present invention is to provide a waterproof cover structure in an electronic device that can be easily viewed, can be reduced in cost, and can clearly see the display state of a light emitter even in the daytime when the surroundings are bright.

  The invention according to claim 1 includes an electric circuit board provided with a light emitter in a device main body case, and the device main body case is attached to an attachment surface, and the electric circuit board is attached in parallel to the attachment surface. In addition, a waterproof cover structure in an electronic device in which a window portion for confirming a display state of the light emitter in its mounted state is located on a lower surface portion of the device main body case, and the window portion is made of a translucent material. A waterproof cover member that is formed and closes the window portion is provided, and the waterproof cover member includes a portion that exhibits a prism function that reflects and refracts light from the light emitter and guides the light to the outside through the window portion. And

  In this way, the light from the light emitter attached to the electric circuit board is guided to the outside through the window portion in the lower surface portion of the device body case through the portion of the waterproof cover member that exhibits the prism function, and emits light. The display state of the body (whether it is lit or flashing) can be visually observed. Therefore, it is only necessary to attach the waterproof cover member having a portion that exhibits the prism function to the window portion of the device main body case. Therefore, it is easy to attach the light emitter and the waterproof cover member, and the cost can be reduced. The waterproofing performance of the light-emitting element can be ensured, and the display state of the light-emitting body can be clearly seen in the daytime when the surroundings are bright.

  According to a second aspect of the present invention, the waterproof cover member is attached to the device body case and closes the window portion, and is connected to the attachment plate portion so as to extend in a direction perpendicular to the attachment plate portion. And a prism portion that reflects and refracts light from the body and guides the light to the outside. Here, it goes without saying that the number of prism portions may be one common to all the light emitters, or may be a plurality corresponding to each light emitter.

  If it does in this way, a waterproof function can be exhibited by the attachment board part, and the prism function which reflects and refracts the light from a light-emitting body by a prism part, and guides it outside through the said window part can each be exhibited.

  According to a third aspect of the present invention, the waterproof cover member includes an intermediate plate portion that extends in a direction orthogonal to the mounting plate portion and one end portion that is connected to the mounting plate portion, and the other end portion of the intermediate plate portion. It is desirable to provide a tip plate portion that is connected and receives the light from the light emitter.

  In this way, the prism portion of the waterproof cover member includes the intermediate plate portion and the tip plate portion, so that the light from the light emitter is incident on the tip plate portion, and is guided to the outside from the mounting plate portion through the intermediate plate portion. As a result, the display state of the illuminant becomes visible.

  According to a fourth aspect of the present invention, a device unit is accommodated in the device main body case, the light emitting body is provided on an electric circuit board in the unit case, and the unit case has a window portion. Correspondingly, an opening is formed, and the front end plate portion of the waterproof cover member is inserted into the unit case through the opening of the unit case and extends to the vicinity of the light emitter or beyond. desirable.

  In this case, the light emitter is provided on the electric circuit board in the unit case, and the tip plate portion of the waterproof cover member extends to the vicinity of the light emitter, so that the light from the light emitter is transmitted to the tip plate portion. And is guided to the outside through the intermediate plate portion and the mounting plate portion, and the display state of the light emitter can be visually observed.

  According to a fifth aspect of the present invention, the tip plate portion has an inclined surface portion formed on a side facing the light emitter, and an inclination angle of the inclined surface portion is equal to an end portion side on which the waterproof cover member is provided. The other end portion of the unit case on the opposite side can be lifted with the one end portion as the center of rotation, and the angle can be removed from the device body case.

  In this way, by lifting the other end portion of the unit case opposite to the one end portion side where the waterproof cover member is provided from the device main body case, The equipment unit can be removed. Therefore, when the equipment unit is taken out for maintenance and inspection, it can be taken out without difficulty.

  The present invention, as described above, exhibits the prism function of the waterproof cover member by attaching the waterproof cover member provided with the portion that exhibits the prism function to the window portion of the device body case. Since the portion is guided to the outside through the window portion on the lower surface portion of the device main body case, the light emitter and the waterproof cover member for ensuring the waterproof performance can be easily and inexpensively attached.

  In addition, since light from the light emitter is guided to the outside through the window on the lower surface of the device body case, it ensures a certain waterproof performance and clearly displays the display state of the light emitter in the daytime when the surroundings are bright. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 shows an optical receiver as an example of an electronic apparatus according to the present invention, FIG. 1 (a) is a front view, FIG. 1 (b) is a side view, FIG. 1 (c) is a bottom view, and FIG. It is a perspective view which shows the attachment state to a surface.

  As shown in FIGS. 1A to 1C and FIG. 2, an optical receiver 11 which is an example of an electronic apparatus according to the present invention includes a box-shaped apparatus main body case 12 and upper and left and right sides of the apparatus main body case 12. On the side portion, there is a lid body 13 on which the mounting flange portions 13a on the upper left and right side portions are rotatably supported. Note that one attachment flange portion 12a is provided on the upper side of the device body case 12, and three attachment flange portions 12b are provided on the lower side.

  A cutout 12Aa from which a power cord 21a from a power supply unit 21, which will be described later, is led out on the side surface 12A of the device body case 12 (the side surface that is the lower surface in the mounted state and where the mounting flange 12b is provided). Is formed.

  Further, the side surface portion 12A is provided with a window portion 12Ab (see FIG. 3) corresponding to the light emitting diode 33 in order to confirm the display state of the light emitting diode 33 (LED) described later, along with the notch portion 12Aa. The waterproof cover member 15 is fixed to the window portion 12Ab with two fixing screws 16A and 16B. The waterproof cover member 15 is formed of a translucent material (for example, acrylic resin), and has a portion that exhibits a prism function that reflects and refracts light from the light emitting diode 33 and guides the light to the outside through the window portion 12Ab. That is, the display state of the light emitting diode 33 can be visually recognized by looking inside through the waterproof cover member 15 of the window portion 12Ab.

  Three openings 12Ac are formed on the opposite side of the notch 12Aa with the window 12Ab interposed therebetween. Two F-type plugs 24 provided in the device unit, for example, the optical receiver body unit 22 project through the two openings 12Ac on the opposite side to the window 12Ab out of the three openings 12Ac, and a coaxial cable (not shown) The F-type connector is connected. The notch 12Aa and the opening 12Ac are not specifically illustrated, but are provided with sealing means so that the waterproof performance equivalent to the waterproof performance of the waterproof cover member 15 can be secured.

  Further, the structure will be described in detail with reference to FIGS.

  A power supply unit 21 and an optical receiver main unit 22 are housed side by side in the device main body case 12, and the upper opening portion thereof is closed by an optical fiber tray 23. The optical fiber tray 23 is formed with a locking surface portion 23 a that is locked by the locking claws 12 c of the device body case 12.

  The power cord 21a of the power unit 21 is led out through the notch 12Aa. Further, the F-type plug 24 that protrudes from the side surface portion of the optical receiver body unit 22 protrudes to the outside through the opening 12Ac.

  As shown in FIG. 4, the optical receiver main unit 22 has an electronic circuit board 32 housed in a shield case 31 (unit case), and a plurality of parts on the side surface portion 12A side on the board 32. A light emitting diode 33 is provided, and an opening 31 a is formed in the shield case 31 corresponding to the light emitting diode 33. The opening 31a is also formed corresponding to the window portion 12Ab of the device main body case 12. The light emitting diode 33 is disposed in the vicinity of the wall surface of the shield case 31, and its upper end is located at a position slightly lower than the lower edge 31aa of the opening 31a (see FIG. 5).

  An extra length portion of an optical fiber (not shown) inserted into the optical fiber tray 23 from the optical fiber insertion port 23b is wound around a plurality of ribs on the tray 23, and an optical connector (see FIG. (Not shown) is connected via a repeater holder 34 to a repeater 35 mounted on the shield case 31.

  The optical receiver main unit 22 has the electronic circuit board 32 accommodated in the shield case 31, and the optical circuit board 32 is disposed in the device main body case 12 in a state where the optical receiver main unit 22 is accommodated in the device main body case 12. It is parallel to the bottom plate and the optical fiber tray 23. Therefore, when the optical receiver 11 is attached to an attachment surface (vertical surface) such as a wall surface as shown in FIG. 2, the electronic circuit board 32 is attached so as to be parallel to the attachment surface.

  As shown in FIG. 5, the waterproof cover member 15 is attached to the device main body case 12 by fixing screws 16A and 16B (see FIG. 3) and attached to the mounting plate portion 15A and the mounting plate portion 15A. Three prism portions 15B are connected so as to extend in a direction orthogonal thereto, and the light from the light emitting diodes 33 is reflected and refracted and guided to the outside. The prism portion 15B has a plate thickness slightly larger than the diameter of the light emitting diode 33, is parallel to each other, and is provided integrally with the mounting plate portion 15A. In this example, as shown in FIGS. 1A and 1C, since three light emitting diodes 33 are provided, three prism portions 15B are also provided correspondingly.

  Each prism portion 15B extends in a direction perpendicular to the mounting plate portion 15A, and has a rectangular plate-shaped intermediate plate portion 15BA whose one end portion is connected to the mounting plate portion 15A and the other end portion of the intermediate plate portion 15BA. And a tip plate portion 15BB having a mountain-shaped cross section that receives light from the diode 33. This front end plate portion 15BB is inserted into the shield case 31 through the opening 31a of the shield case 31, and extends to the vicinity of the light emitting diode 33 or a position beyond it, and a portion of the front end plate portion 15BB located in the shield case 31. The first inclined surface portion 15Ba is formed on the side facing the light emitting diode 33. Accordingly, the light emitting diode 33 does not emit light toward the window portion 12Ab or the opening 31a, but the waterproof cover member 15 includes the prism portion 15B, so that the window portion 12Ab (the mounting plate portion 15A of the waterproof cover member 15) is provided. ), The display state of the light emitting diode 33 can be visually observed in a state indicated by 33 'in FIG. 1C, for example. Here, as the light emitting diode 33, for example, a single-color LED for confirming whether or not power is supplied from the power source to the optical receiver body unit 22 (when supplied, it is lit red, but supplied) 2 color LED for confirming whether the input level of the light input through the optical fiber is in the proper range (green if it is in the proper range, red if it is not), viewing It is used for a control LED (green when viewing is possible and red when viewing is added).

  As shown in FIG. 6, the inclination angle θ1 of the first inclined surface portion 15Ba rotates the other end portion of the shield case 31 on the side opposite to the one end portion side where the waterproof cover member 15 is provided. The angle is lifted as the center and allows removal of the shield case 31 from the device body case 12. The inclination angle θ1 is an angle that does not impair the incidence of a sufficient amount of light from the light emitting diode 33. That is, even if the other end of the optical receiver main unit 22 (shield case 31) is lifted and inclined in order to remove the optical receiver main unit 22 from the device main body case 12, as shown in FIG. Since the prism portion 15B of the member 15 and the aperture periphery of the aperture 31a of the shield case 31 do not collide, the optical receiver body unit 22 can be removed smoothly. The optical receiver main unit 22 is normally placed on the unit receiving seats 12d and 12e (see FIG. 4).

  A second inclined surface portion 15Bb extending from the inside of the shield case 31 to the outside of the case is formed on the opposite side of the tip plate portion from the first inclined surface portion 15Ba (upper side in FIG. 5). The inclination angle θ2 of the second inclined surface portion 15Bb is set to an angle at which light incident from the first inclined surface portion 15Ba is totally reflected and goes out through the window portion 12Ab.

  If comprised as mentioned above, since the window part 12Ab is obstruct | occluded with the waterproof cover member 15 which has a prism function, it is light-emitting without making the light emitting diode 33 light-emit toward the window part 12Ab or the opening 31a. The display state of the diode 33 can be visually checked. Therefore, not only the waterproof performance is enhanced by the waterproof cover member 15 but also the restriction on the place where the light emitting diode 33 is provided is relaxed by the prism function.

  Further, by appropriately selecting the inclination angles of the first and second inclined surface portions 15Ba and 15Bb, the light from the light emitting diode 33 can be guided in an arbitrary direction by the catadioptric refraction at the prism portion 15B. It becomes possible to make it visible from a desired direction. Moreover, since the window portion 12Ab is provided on the lower surface portion of the device main body case 12 that does not receive direct sunlight, the lighting of the light emitting diode 33 in the shield case 31 where sunlight does not reach is confirmed in bright daylight. Even in this case, even when the luminance of the light emitting diode 33 is low, high visibility can be obtained. Furthermore, even if it is provided in a dark place such as under an eaves or a distribution box in an attic, it can be visually observed.

  Further, since the prism function of the waterproof cover member 15 is used, the light from the light emitting diode 33 provided on the electric circuit board 32 is emitted in a desired direction (for example, the direction in which the window portion 12Ab is present). There is no need to provide a spacer or bend the foot of the light emitting diode, the mounting operation of the light emitting diode 33 is simple, and the degree of freedom in design is increased.

  As described above, the waterproof cover member 15 has both the waterproof function and the control function of the light emitting direction of the light emitting diode 33, so that the mounting work is easy and the degree of freedom of design is increased. It becomes possible to make parts, and the structure is advantageous for cost reduction.

  Furthermore, since the display state of the light emitting diode 33 can be known through the window (waterproof cover member) without opening the lid, it is easy for the operator to handle the maintenance and inspection.

  In the above-described embodiment, the attachment plate portion 15A is attached in direct contact with the device body case 12, and even if water does not easily enter into the interior, the waterproof performance is secured to the extent that it does not accumulate inside. However, it is also possible to further improve the waterproof performance by attaching via a sealing material such as packing.

  In the above embodiment, the waterproof cover member 15 is fixed by the fixing screws 16A and 16B. However, the present invention is not limited thereto, and, for example, a fitting convex portion or fitting is provided on the waterproof cover member 15 side. On the other hand, the waterproof cover member is provided on the device main body case by providing the fitting concave portion or the fitting convex portion that is detachably fitted to the fitting convex portion or the fitting concave portion on the device main body case 12 side. It is also possible to attach it with one touch.

FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a bottom view, illustrating an optical receiver that is an example of an electronic apparatus according to the invention. It is a perspective view which shows the attachment state to the attachment surface of an optical receiver. It is a disassembled perspective view of the said optical receiver. It is sectional drawing in the AA line of FIG.1 (c). It is an enlarged view of the B section of FIG. It is explanatory drawing of removal of an optical receiver main body unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Optical receiver 12 Apparatus main body case 12A Side surface part 12Ab Window part 15 Waterproof cover member 15A Mounting plate part 15B Prism part 15BA Intermediate | middle board part 15BB Tip board part 15Ba First inclined surface part 22 Optical receiver main body unit 31 Shield case (unit Case)
32 Electronic circuit board 33 Light emitting diode

Claims (5)

An electrical circuit board provided with a light emitter is provided in the equipment body case, the equipment body case is attached to an attachment surface so that the electrical circuit board is parallel to the attachment surface, and the light emission in the attached state. A waterproof cover structure in an electronic device in which a window portion for confirming a display state of the body is located on a lower surface portion of the device body case,
The window portion is provided with a waterproof cover member that is formed of a translucent material and closes the window portion,
The waterproof cover structure for an electronic apparatus, wherein the waterproof cover member includes a portion that exhibits a prism function that reflects and refracts light from the light emitter and guides the light to the outside through the window.   The waterproof cover member is attached to the device main body case and closes the window portion, and is connected to the attachment plate portion so as to extend in a direction perpendicular thereto, and reflects and refracts light from the light emitter. The waterproof cover structure for an electronic device according to claim 1, further comprising a prism portion that leads to the outside.   The prism portion extends in a direction orthogonal to the mounting plate portion, and has one end portion connected to the mounting plate portion and the other end portion of the intermediate plate portion, and receives light from the light emitter. The waterproof cover structure for an electronic device according to claim 2, further comprising a tip plate portion having a mountain-shaped cross section. A device unit is housed in the device body case, the device unit is provided with the light emitter on an electric circuit board in the unit case, and an opening is formed in the unit case corresponding to the window portion. Become
4. The electron according to claim 2, wherein a front end plate portion of the waterproof cover member is inserted into the unit case through an opening of the unit case and extends to the vicinity of or beyond the light emitter. Waterproof cover structure for equipment. The tip plate portion has an inclined surface portion formed on the side facing the light emitter,
The inclination angle of the inclined surface portion is determined by lifting the other end portion of the unit case opposite to the one end portion side where the waterproof cover member is provided, with the one end portion as a rotation center, 5. The waterproof cover structure for an electronic device according to claim 4, wherein the angle is an angle allowing removal of the device unit.

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