JP5795097B2 - Electronics - Google Patents

Description

  According to the present invention, a circuit board on which a plurality of light emitting diodes are mounted is housed in a housing, and light is guided between a display window hole provided in the housing and a light emitting surface of the light emitting diode by a light guide assembly. More particularly, the present invention relates to an improvement in an electronic device in which a circuit board is accommodated in a direction orthogonal to a wall portion of a housing provided with a display window hole.

  In an electronic device in which a light emitting diode (Light Emitting Diode, LED) is mounted on a circuit board housed in a housing, the space between a display window hole provided in the housing and the light emitting surface of the light emitting diode is transparent such as polycarbonate. It communicates with a light guide made of a resin material. As an electronic device in which a plurality of light emitting diodes are mounted on a circuit board, a device that uses a light guide assembly in which a plurality of light guides are integrated is also known.

  For example, in the electronic device described in Patent Document 1, a circuit board in which a plurality of light emitting diodes are directly attached is provided inside a casing having a plurality of display window holes. A predetermined distance is secured between the circuit board and the display window hole, and a plurality of columnar light guides for guiding the light of each light emitting diode to the respective display window holes are disposed. These light guides are integrally connected by a connecting member and attached to one case of the housing.

  Further, in the electronic device described in Patent Document 2, a plurality of light guides for guiding the light of each light-emitting diode mounted on the circuit board to the outside of the casing are integrated by a connecting member, and two of the casings are integrated. It is sandwiched between cases.

JP-A-5-303340 JP 2012-230998 A

  In the electronic device described in Patent Document 1, since the light guide assembly is maintained in a state of being attached to one case, it is possible to easily perform work when disassembling or assembling the two cases. it can. However, it is assumed that light is guided in a direction orthogonal to the circuit board on which the light emitting diode is mounted, and there is no consideration for guiding light in a parallel direction with respect to the circuit board. For this reason, there exists a possibility of causing the enlargement of a housing | casing in the direction orthogonal to a circuit board.

  On the other hand, the electronic device described in Patent Document 2 guides light in a direction parallel to a circuit board on which a light emitting diode is mounted. However, the light guide assembly is only sandwiched between the two cases. Therefore, when the two cases are not assembled, the light guide assembly cannot be held. This not only complicates the work of disassembling and assembling the two cases during maintenance at the site of use, but also causes the light guide assembly to fall off and damage the light guide assembly when the case is disassembled. There is also a risk of problems such as loss or loss. In addition, in order to insert the light emitting tip of the light guide into the display window hole, a space for inserting and moving the light guide into the housing must be secured, and the direction along the circuit board In addition, there is a possibility that the casing becomes large.

  In view of the above circumstances, the present invention aims to reduce the size of a housing that houses a circuit board on which a light-emitting diode is mounted, and even if the housing is disassembled during maintenance and inspection, the light guide assembly is damaged or lost. It is an object of the present invention to provide an electronic device that can be easily assembled without causing a problem.

In order to achieve the above object, an electronic apparatus according to the present invention has a first case that supports a circuit board on which a plurality of light emitting diodes are mounted side by side, a side wall and an outer peripheral wall that are orthogonal to each other, and the side wall is A second case that is opposed to the circuit board and that is assembled to the first case in a state where the outer peripheral wall is disposed around the circuit board; and a light guide that is provided corresponding to each light emitting diode. And an electronic device configured to cause the light of each light-emitting diode to be emitted from a display window hole formed in the outer peripheral wall by each light guide, wherein the circuit board includes a plurality of light-emitting diodes in two rows. In addition to mounting in parallel, the outer peripheral wall is formed with display window holes arranged in two rows corresponding to the light emitting diodes in each row, and the first row corresponding to the light emitting diodes in the first row is formed. Light body, the second column of the arranged between the circuit board and the second column of the light guide that corresponds to the light emitting diode, the first row and the second row of the lightguide to both the circuit board Arranged in parallel, the second row of light emitting diodes is mounted on the circuit board so that the light emitting surface is orthogonal to the component mounting surface of the circuit board, and the second row of light guides is The base portion has a facing portion having an angle of 90 ° with respect to the longitudinal direction, and has a columnar shape having a light emitting tip portion at the tip, and guides light incident from the facing portion to the light emitting tip portion. It is characterized by being.

  According to the present invention, the light guides are integrated to form a light guide assembly, and the light guides are guided between the outer peripheral walls in which the respective light guides are parallel to the circuit board and the display window holes are formed. Since the second case is provided with an elastic holding plate that holds the assembly, it is possible to reduce the size of the case that houses the circuit board on which the light-emitting diodes are mounted, and to guide the case when the case is disassembled during maintenance and inspection. Assembling can be easily performed without causing problems such as damage and loss to the optical assembly.

1 is a front view of an electronic apparatus according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along line XX in FIG. 3 is a cross-sectional view taken along line YY in FIG. 4 is an external view of a light guide assembly applied to the electronic apparatus shown in FIG. FIG. 5 is an external view of a pedestal portion provided in the casing of the electronic device shown in FIG. 6 is an external view of a state in which a light guide assembly is assembled to the pedestal portion shown in FIG. FIG. 7 is an enlarged view showing a main part of FIG. 8 is an enlarged cross-sectional view of the upper part of an electronic apparatus according to Embodiment 2 of the present invention. FIG. 9 is an external view of a light guide assembly applied to the electronic device shown in FIG. 10 is an enlarged cross-sectional view of an upper part of an electronic apparatus according to Embodiment 3 of the present invention. FIG. 11 is an external view of a light guide assembly applied to the electronic apparatus shown in FIG. FIG. 12 is an enlarged top sectional view of a modification of the electronic device shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an electronic apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Embodiment 1 FIG.
FIG. 1 shows the appearance of an electronic apparatus according to Embodiment 1 of the present invention. The electronic device illustrated here is, for example, an extension unit with respect to the basic unit 2 of the programmable controller, and is disposed at a side surface position of the basic unit 2. As shown in FIGS. 2 and 3, the electronic device serving as the extension unit is housed in a housing 100 constituted by a pair of first case 110 and second case 120 on the left and right, and the housing 100. Circuit board 200. The first case 110 and the second case 120 are each molded from a resin material.

  As shown in FIGS. 1 to 3, the first case 110 has a connection hook 112 a on the outer surface of the base plate 111 and a substrate base 113 on the inner surface of the base plate 111. The connection hook 112 a is for mechanically connecting the electronic device to the side surface position of the basic unit 2. In the first embodiment, the connecting hook 112a is provided so as to protrude from above and below the base plate 111 in FIG. The board pedestal 113 serves as a seat for supporting the circuit board 200 inside the housing 100, and is provided at a plurality of positions on the base plate 111. The circuit board 200 accommodated in the housing 100 is supported so as to be parallel to the base plate 111 of the first case 110 by being screwed to the board base 113 after being seated on the board base 113. . Note that the method of supporting the circuit board 200 on the base plate 111 is not necessarily limited to the method of fastening with screws. For example, the substrate holding hook 114 may be provided on the inner surface of the base plate 111, and the substrate holding hook 114 may be passed through and engaged with the engagement hole 201 of the circuit board 200 seated on the substrate base 113. The screw fastening and the substrate holding hook 114 may be used in combination.

  The second case 120 is formed by integrally molding a side wall 121 and an outer peripheral wall 122 provided around the side wall 121. The outer peripheral wall 122 is provided so as to be orthogonal to the side wall 121. In the following, for the sake of convenience, the outer peripheral wall 122 located on the near side in FIG. 1 is the front outer peripheral wall 122a, the upper outer peripheral wall 122 is the upper outer peripheral wall 122b, and the lower outer peripheral wall 122 is the lower outer peripheral wall 122c. The outer peripheral wall 122 located behind the wall 122a is referred to as a rear outer peripheral wall 122d and is distinguished from each other.

  Although not shown in the drawing, the upper surface outer peripheral wall 122b, the lower surface outer peripheral wall 122c, and the rear outer peripheral wall 122d of the second case 120 are provided with a plurality of hook holes 123, respectively. When the first case 110 and the second case 120 are combined, the hook hole 123 is engaged with the claw portion 115 a of the united elastic hook 115 provided at a corresponding position of the first case 110. The first case 110 and the second case 120 can be assembled and integrated by engaging the claw portion 115 a of the elastic hook for combination 115 with the hook hole 123 of the second case 120. When the first case 110 and the second case 120 are integrated and the claw portion 115a is pressed inward through the hook hole 123, the united elastic hook 115 is elastically deformed. Thus, the engagement state between the hook hole 123 and the claw portion 115a is released, and the first case 110 and the second case 120 can be disassembled.

  On the inner surface of the side wall 121, when the first case 110 and the second case 120 are integrated, a pressing column 124 that presses the circuit board 200 seated on the board base 113 of the first case 110 is provided. is there. The side wall 121 of the second case 120 is arranged in parallel with the circuit board 200 by pressing the tip of the pressing column 124 against the circuit board 200. Moreover, the code | symbol 125 in FIG. 1 is a mounting leg provided in 122 d of back outer peripheral walls of the 2nd case 120. As shown in FIG. The mounting legs 125 are screwed and fixed to the wall surface (not shown) of the control panel facing the rear outer peripheral wall 122d of the second case 120 in a state where the electronic device is coupled to the side surface position of the basic unit 2. Is to do. Although not clearly shown in the drawing, the rear outer peripheral wall 122d of the second case 120 is also provided with an engagement groove for a DIN rail according to public standards. When the DIN rail is provided on the wall surface of the control panel (not shown), the electronic device is suspended on the DIN rail through the engagement groove without using the attachment feet 125.

  As shown in FIGS. 2 and 3, the circuit board 200 housed in the housing 100 has a low-surface mounted component 210 on the solder surface 200 a facing the base plate 111 of the first case 110. Soldered to A plurality of light emitting diodes 220 and a tall circuit component 221 are mounted on the opposite surface (component mounting surface) 200 b of the circuit board 200. The light emitting diode 220 and the tall circuit component 221 are soldered to the circuit pattern on the solder surface 200a by lead terminals (not shown) that penetrate the circuit board 200. In the first embodiment, a straight type is directly mounted on the circuit board 200 so that the light emitting surfaces of the respective light emitting diodes 220 are parallel to the opposite surface 200 b of the circuit board 200. The tall circuit components 221 include relatively large circuit components such as a mating connector of the external connection terminal block 222 and a power supply capacitor. As shown in FIG. 1, the external connection terminal block 222 is provided in a state of being exposed to the outside from an opening formed in the front outer peripheral wall 122 a of the second case 120. The circuit board 200 is provided with an extension connector 223 so as to be exposed to the outside of the first case 110. The extension connector 223 is for electrically connecting the electronic circuit of the circuit board 200 to the electronic circuit of the basic unit 2 when the electronic device is coupled to the side surface position of the basic unit 2.

  On the other hand, as shown in FIG. 1, the electronic device has a display window hole 126 provided in the front outer peripheral wall 122 a of the second case 120, and the side wall of the second case 120 as shown in FIG. 3. 121 has a pedestal 140.

  The display window holes 126 are openings for making the light emitted from the light emitting diodes 220 mounted on the circuit board 200 visible to the outside of the housing 100, and each has a circular shape with the same inner diameter. In the first embodiment, three light emitting diodes 220 are mounted on the circuit board 200 at equal intervals so as to be arranged vertically in FIG. 1, and each light emitting diode 220 is mounted on the front outer peripheral wall 122a of the second case 120. Corresponding three display window holes 126 are provided at equal intervals in the vertical direction in FIG. As shown in FIGS. 5 and 6, a thin portion 128 is provided in a portion of the front outer peripheral wall 122 a where the display window hole 126 is formed. The thin portion 128 is configured by providing a recess in a rectangular region including the display window hole 126 from the protruding end surface of the front outer peripheral wall 122a. As for the recessed part which comprises this thin part 128, the surrounding wall 128a inclines so that an area may spread gradually as it goes inside the housing | casing 100. FIG. As shown in FIG. 7, the display window hole 126 is formed in a tapered shape so that the opening on the outer surface is wider than the opening on the inner surface.

  The pedestal 140 holds the light guide 131 for guiding the lighting light of the light emitting diode 220 mounted on the circuit board 200 to the display window hole 126 in the second case 120. The light guide 131 is provided individually for each light emitting diode 220. In the first embodiment, as shown in FIG. 4, a light guide 131 having a prism shape having a slope portion 131a at the base end portion and a light emitting tip portion 131b at the tip end portion is applied. The slope 131a is a plane that is inclined at an angle of 45 ° with respect to the longitudinal direction of the light guide 131. As shown in FIG. 7, in the light guide 131, when the light of the light emitting diode 220 is incident from the side surface 131c of the base end portion, the light is orthogonally reflected by the inclined surface portion 131a and guided to the light emitting tip portion 131b of the tip portion. It has become so. The dimensions of the light guide 131 are configured to have a cross-sectional area equal to or greater than that of the display window hole 126 of the second case 120. As shown in FIG. 1, the light emitting tip 131 b of the light guide 131 is arranged with respect to the display window hole 126 so as to have an annular gap around the display window hole 126. It is configured to have a circular cross section with a small outer diameter.

  These light guides 131 are integrated by a connecting member 132 to form a light guide assembly 130. The connecting member 132 has a prismatic shape thinner than the light guide 131, and connects the light guides 131 in a state where the three light guides 131 are parallel to each other at equal intervals. ing. The position where the connecting member 132 is provided is set to be unevenly distributed in the thickness direction of the light guide 131 in order to suppress light leakage to the adjacent light guide 131 via the connecting member 132. In the first embodiment, the light guide 131 and the connecting member 132 are integrally formed of polycarbonate, which is a transparent resin material.

  The pedestal portion 140 that holds the light guide assembly 130 is provided so as to protrude toward the first case 110 from a portion of the side wall 121 of the second case 120 that is close to the front outer peripheral wall 122a. The pedestal part 140 is provided with three groove parts 141, a light shielding partition wall 142 provided between the groove parts 141, and an elastic holding plate 143 provided corresponding to the light shielding partition wall 142.

  The groove portion 141 is a concave portion formed at the protruding end portion of the pedestal portion 140, and the base end portion of the light guide body 131 when the light emitting front end portion 131 b of the light guide body 131 is disposed facing the display window hole 126. Can be accommodated in a fitted state. The light shielding partition wall 142 is a portion protruding toward the first case 110 from a portion between the groove portions 141, and is molded from an opaque resin material. The light shielding partition wall 142 is formed such that when the side surface of the light guide 131 is brought into contact with the groove 141, the light shielding partition wall 142 protrudes from between the light guides 131, and the respective leading end portions are located close to the circuit board 200. It is. As is clear from the figure, the projecting end of the light shielding partition wall 142 is provided with inclined surfaces 142 a on both sides so that the width gradually decreases toward the first case 110. The elastic holding plate 143 protrudes from the portion between the light shielding partition wall 142 and the front outer peripheral wall 122a toward the first case 110, and has a claw portion 143a at each tip. When the front end of the light guide 131 accommodated in the groove 141 is brought into contact with the front outer peripheral wall 122a, the elastic holding plate 143 is lightly attached to the inner surface of the thin portion 128 via the connecting member 132. It is provided so that it can restrict | limit that the light guide 131 moves in the direction away from the groove part 141 by contact | abutting to the connection member 132 so that it may press, and also engaging the nail | claw part 143a with the connection member 132. FIG. In addition, the code | symbol 121a in FIG. 3 is a punching hole of the metal mold | die for shape | molding the nail | claw part 143a of the elastic holding plate 143 used as an undercut when shape | molding the 2nd case 120. FIG.

  When the light guide assembly 130 is attached to the pedestal portion 140 of the second case 120, the light emitting tip 131b is positioned in the display window hole 126 from an oblique direction with respect to the thin portion 128 of the front outer peripheral wall 122a. Thereafter, the connecting member 132 may be slid from the inclined surface of the claw portion 143a so as to be pushed between the elastic holding plate 143 and the front outer peripheral wall 122a. That is, when the connecting member 132 is pushed between the elastic holding plate 143 and the front outer peripheral wall 122a from the inclined surface of the claw portion 143a, the elastic holding plate 143 is bent so as to be separated from the front outer peripheral wall 122a, thereby causing the claw portion at the tip. Since 143a moves backward, the entire light guide assembly 130 can be attached to the pedestal 140 without securing a space for moving the light guide assembly 130 inside the housing 100. In particular, since the thin wall portion 128 is provided on the front outer peripheral wall 122a, the above-described operation can be easily performed. In addition, since the pedestal portion 140 that supports the light guide assembly 130 and the display window hole 126 in which the light emitting tip portion 131 b is disposed are provided in the same second case 120, the display window hole 126 can be accurately set. A light emitting tip 131b can be arranged. The light guide assemblies 130 attached to the pedestal portion 140 of the second case 120 are sandwiched between the inner surfaces of the front outer peripheral wall 122a so that each light guide 131 is lifted lightly upward by the elastic holding plate 143. At the same time, the claw portion 143a of the elastic holding plate 143 is engaged with the connecting member 132, so that the movement of the side surface of the light guide 131 away from the groove portion 141 is prevented.

  Therefore, the case 100 can be easily disassembled into the first case 110 and the second case 120, or the work when the case 100 is configured by assembling the first case 110 and the second case 120 can be easily performed. . Moreover, since the light guide assembly 130 does not fall off from the second case 120 during these operations, there is no possibility that the light guide assembly 130 may be damaged or lost. Furthermore, since the prismatic light guide 131 is arranged in a direction parallel to the circuit board 200, the size of the casing 100 is reduced without increasing the dimension in the direction orthogonal to the circuit board 200. Can do.

  When the light emitting diode 220 mounted on the circuit board 200 is turned on, as shown in FIG. 7, the light emitting tip 131 b and the annular gap s formed between the light emitting tip 131 b and the peripheral wall of the display window hole 126. Light is emitted to the outside of the housing 100 through the light source. That is, the light emitting tip 131b of the light guide 131 is the first light emitting surface, and the gap s between the light emitting tip 131b and the display window hole 126 is the second light emitting surface. For this reason, for example, even if there is a difference in production lots, a light emitting surface in which the first light emitting surface and the second light emitting surface are uniformly polymerized by the plurality of display window holes 126 can be obtained. Further, the light emitting area of the light emitting diode 220 as viewed from the front is the opening area of the display window hole 126, and by setting the display window hole 126 larger than the light emitting tip 131b of the light guide 131, The lighting visibility of the light emitting diode 220 can be improved. In addition, when the display window hole 126 is set larger than the light emitting tip 131b of the light guide 131, the light emitting tip 131b is displayed from an oblique direction when the light guide assembly 130 is attached to the pedestal 140. There is also an advantage that the work at the time of positioning in the window hole 126 can be facilitated. Furthermore, since the display window hole 126 is tapered so that the opening area of the outer surface is larger than the inner surface of the front outer peripheral wall 122a, the reduction rate of the light emitting area when the line of sight is changed is suppressed. The visibility of the light emitting diode 220 is improved.

  Further, the light guide assembly 130 is provided so that the connecting member 132 that connects the three light guides 131 is unevenly distributed in the thickness direction of the light guide 131. Accordingly, light leakage from between the light guides 131 is suppressed. For example, when one adjacent light emitting diode 220 is turned on and the other light emitting diode 220 is turned off, the other light emitting diode 220 is turned off. It becomes possible to recognize that it is doing. In addition, when the light guide assembly 130 is not arranged in a normal posture with respect to the pedestal portion 140 of the second case 120, the distance from the groove portion 141 of the pedestal portion 140 to the connecting member 132 is different, so that the light guide When the side surface of the body 131 comes into contact with the groove portion 141, the elastic holding plate 143 cannot be brought into contact with the connecting member 132. Therefore, there is no possibility that the light guide assembly 130 is attached to the pedestal portion 140 with the front and back sides being wrong, and the light emitted from the light emitting diode 220 can be reliably led to the light emitting tip 131b.

  Further, the light-shielding partition wall 142 formed of an opaque resin material protrudes from between the light guides 131 when the side surfaces of the light guides 131 are brought into contact with the groove portions 141, and the respective leading end portions are formed on the circuit board 200. It is provided so as to be close to each other. Moreover, inclined surfaces 142a are provided on both sides of the protruding end portion of the light shielding partition wall 142 so that the width gradually decreases toward the first case 110. Therefore, not only can the light guide 131 be held in a stable state with respect to the pedestal part 140, but also the adjacent light guides 131 can be prevented from interfering with other components mounted on the circuit board 200. In addition, it is possible to suppress direct light leakage between the light guides and to prevent detour light leaking from one light guide 131 to the other light guide 131 due to reflection from the circuit board 200.

  In the first embodiment described above, the display window hole 126 is illustrated as being tapered so that the opening area of the outer surface is larger than the inner surface of the front outer peripheral wall 122a. The display window hole may be formed so that the opening area of the outer surface is the same. In addition, although the circular display window hole 126 is provided, the opening shape of the display window hole 126 is not limited to a circle and may be an arbitrary polygon. The same applies to the cross-sectional shape of the light emitting tip 131b, and it may be an arbitrary polygon. Therefore, for example, if the opening shape of the display window hole 126 is changed according to the classification type of the display content, an identification means other than the color coding of the light emitting diode 220 can be obtained. However, in any combination of the shape of the display window hole 126 and the cross-sectional shape of the light emitting tip 131b, a gap s is formed around the entire circumference between the light emitting tip 131b and the display window hole 126 in consideration of the light emitting area. Is preferably ensured.

  Further, the end face shape of the light emitting tip 131b can be a flat surface or a spherical shape, but it is preferable to set the end surface shape so that it does not protrude from the display window hole 126 to the outside of the housing 100. If the light emitting tip 131b does not protrude outside the casing 100, not only the outer surface of the casing 100 can be cleaned, but also the light emitting tip 131b is scratched during cleaning, or the pedestal 140 is held elastically by being pushed in force. Damage to the plate 143 and the connecting member 132 of the light guide assembly 130 can be prevented in advance.

  Furthermore, although the elastic holding plate 143 is arranged between the light guides 131, the present invention is not limited to this. For example, when a large number of light emitting diodes 220 are arranged, the connecting members 132 are protruded to the left and right of the connected light guides 131, and the elastic holding plate 143 presses the connecting members 132 protruding from the left and right. If it comprises, the mutual space | interval of the light guide 131 can be set narrow, and the occupation space of the light guide assembly 130 can be reduced.

  Furthermore, although the inclined surface 142a is provided at the projecting end of the light shielding partition wall 142, the same effect can be obtained even if the entire length of the light shielding partition wall 142 has a flat cross-sectional shape. Is possible.

Embodiment 2. FIG.
FIG. 8 shows a cross section of the main part of an electronic apparatus according to Embodiment 2 of the present invention. As in the first embodiment, the electronic device exemplified here includes a housing 100 constituted by a pair of first case 110 and second case 120 on the left and right sides, and a circuit board 200 housed in the housing 100. The first embodiment differs from the first embodiment in that the three light emitting diodes 320 mounted on the circuit board 200 and the display window in which the light emitted from the light emitting diodes 320 is formed on the front outer peripheral wall 122a of the second case 120. The structure of the light guide 331 for guiding to the hole 126 is different.

  That is, the three light emitting diodes 320 mounted on the circuit board 200 at equal intervals are configured such that the respective light emitting surfaces are orthogonal to the opposite surface 200 b of the circuit board 200. As this type of light emitting diode 320, as shown in FIG. 8, a connector having a right angle system may be applied. Alternatively, an auxiliary board is disposed so as to be orthogonal to the opposite surface 200 b of the circuit board 200, and a straight type light emitting diode 320 is mounted on the auxiliary board, so that the light emitting surface is opposite to the opposite surface 200 b of the circuit board 200. You may comprise so that it may orthogonally cross and these may be combined.

  The light guide 331 is individually provided for each light emitting diode 320. In the second embodiment, as shown in FIG. 9, a light guide 331 having a prismatic shape having a facing portion 331a at the proximal end and a light emitting distal end 331b at the distal end is applied. The facing portion 331a is a plane having an angle of 90 ° with respect to the longitudinal direction of the light guide 331. In this light guide 331, the lighting light of the light emitting diode 320 incident from the facing portion 331a at the base end portion travels straight and is guided to the light emitting tip portion 331b at the tip portion.

  Further, the three light guides 331 are integrated by a connecting member 332 to constitute a light guide assembly 330. The connecting member 332 has a prismatic shape that is thinner than the light guide 331, and connects the light guides 331 with the three light guides 331 being parallel to each other at equal intervals. ing. The position where the connecting member 332 is provided is set to be unevenly distributed in the thickness direction of the light guide 331 in order to suppress light leakage to the adjacent light guide 331 via the connecting member 332. In the second embodiment, the light guide 331 and the connecting member 332 are integrally formed of polycarbonate, which is a transparent resin material.

  The light guide 331 has a cross-sectional area equal to or larger than that of the display window hole 126 of the second case 120, and the light emitting tip 331 b of the light guide 331 is relative to the display window hole 126. The point that it is configured to have a circular cross section having an outer diameter smaller than the inner diameter of the display window hole 126 so as to be arranged with an annular gap s around is the same as in the first embodiment. . In addition, in the second embodiment, the same configurations as those in the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

  Also in the second embodiment, when the light guide assembly 330 is attached to the pedestal portion 140 of the second case 120, the light emitting tip portion 331b is displayed from the oblique direction with respect to the inner surface of the front outer peripheral wall 122a. If the elastic holding plate 143 is pushed between the front outer peripheral wall 122a so that the connecting member 332 is slid from the inclined surface of the claw portion 143a after being positioned at 126, the elastic holding plate 143 is separated from the front outer peripheral wall 122a. Since the claw portion 143a at the tip is retracted by being bent in a straight line, the entire light guide assembly 330 is attached to the pedestal portion 140 without securing a space for moving the light guide assembly 330 inside the housing 100. Is possible. In particular, since the thin wall portion 128 is provided on the front outer peripheral wall 122a, the above-described operation can be easily performed. In addition, since the pedestal portion 140 that supports the light guide assembly 330 and the display window hole 126 in which the light emitting tip portion 331b is disposed are provided in the same second case 120, the display window hole 126 can be accurately set. A light emitting tip 331b can be arranged. The light guide assemblies 330 attached to the pedestal portion 140 of the second case 120 are sandwiched between the inner surfaces of the front outer peripheral wall 122a so that each light guide 331 is lifted lightly upward by the elastic holding plate 143. At the same time, the claw portion 143a of the elastic holding plate 143 is engaged with the connecting member 332, so that the movement of the side surface of the light guide 331 away from the groove portion 141 is prevented.

  Therefore, the case 100 can be easily disassembled into the first case 110 and the second case 120, or the work when the case 100 is configured by assembling the first case 110 and the second case 120 can be easily performed. . Moreover, since the light guide assembly 330 does not fall out of the second case 120 during these operations, there is no possibility that the light guide assembly 330 may be damaged or lost. Furthermore, since the prismatic light guide 331 is arranged in a direction parallel to the circuit board 200, the size of the casing 100 can be reduced without increasing the dimension in the direction orthogonal to the circuit board 200. Can do.

  When the light emitting diode 320 mounted on the circuit board 200 is turned on, as shown in FIG. 8, the light emitting tip 331b and the annular gap s formed between the light emitting tip 331b and the peripheral wall of the display window hole 126 are formed. Light is emitted to the outside of the housing 100 through the light source. That is, the light emitting tip 331b of the light guide 331 becomes the first light emitting surface, and the gap s between the light emitting tip 331b and the display window hole 126 becomes the second light emitting surface. For this reason, for example, even if there is a difference in production lots, a light emitting surface in which the first light emitting surface and the second light emitting surface are uniformly polymerized by the plurality of display window holes 126 can be obtained. Further, the light emitting area of the light emitting diode 320 as viewed from the front is the opening area of the display window hole 126, and the display window hole 126 is set larger than the light emitting tip 331b of the light guide 331. The lighting visibility of the light emitting diode 320 can be improved. Moreover, when the display window hole 126 is set larger than the light emitting tip 331b of the light guide 331, the light emitting tip 331b is displayed from an oblique direction when the light guide assembly 330 is attached to the pedestal 140. There is also an advantage that the work at the time of positioning in the window hole 126 can be facilitated. Furthermore, since the display window hole 126 is tapered so that the opening area of the outer surface is larger than the inner surface of the front outer peripheral wall 122a, the reduction rate of the light emitting area when the line of sight is changed is suppressed. The visibility of the light emitting diode 320 is improved. In addition, in the second embodiment, the light emitting surface of the light emitting diode 320 is configured to be orthogonal to the opposite surface 200b of the circuit board 200, and the lighting light of the light emitting diode 320 travels straight inside the light guide 331. Therefore, the light guide efficiency is improved as compared with the first embodiment, and the visibility of the lighting light is further improved.

  In addition, the light guide assembly 330 is provided so that the connecting member 332 that connects the three light guides 331 is unevenly distributed in the thickness direction of the light guide 331. Accordingly, since light leakage between the light guides 331 is suppressed, for example, when one adjacent light emitting diode 320 is turned on and the other light emitting diode 320 is turned off, the other light emitting diode 320 is turned off. It becomes possible to recognize that it is doing. In addition, when the light guide assembly 330 is not arranged in a normal posture with respect to the pedestal portion 140 of the second case 120, the distance from the groove portion 141 of the pedestal portion 140 to the connecting member 332 is different. When the side surface of the body 331 comes into contact with the groove 141, the elastic holding plate 143 cannot be brought into contact with the connecting member 332. Therefore, there is no possibility that the light guide assembly 330 is attached to the pedestal part 140 with the front and back sides being wrong, and the lighting light of the light emitting diode 320 can be reliably led to the light emitting tip 331b.

  Further, the light-shielding partition wall 142 formed of an opaque resin material protrudes from between the light guides 331 when the side surfaces of the light guide 331 are brought into contact with the groove 141, and individual tip portions are formed on the circuit board 200. It is provided so as to be close to each other. Moreover, inclined surfaces 142a are provided on both sides of the protruding end portion of the light shielding partition wall 142 so that the width gradually decreases toward the first case 110. Therefore, not only can the light guide 331 be held in a stable state with respect to the pedestal part 140, but also the adjacent light guides 331 can be prevented from interfering with other components mounted on the circuit board 200. In addition, it is possible to suppress direct light leakage therebetween, and it is also possible to prevent detour light leakage that enters light from one light guide 331 to the other light guide 331 due to reflection from the circuit board 200.

  In the second embodiment described above, the display window hole 126 is illustrated as being tapered so that the opening area of the outer surface is larger than the inner surface of the front outer peripheral wall 122a. The display window hole may be formed so that the opening area of the outer surface is the same. In addition, although the circular display window hole 126 is provided, the opening shape of the display window hole 126 is not limited to a circle and may be an arbitrary polygon. The same applies to the cross-sectional shape of the light emitting tip 331b, and it may be an arbitrary polygon. Therefore, for example, if the opening shape of the display window hole 126 is changed according to the classification type of the display content, an identification unit other than the color coding of the light emitting diode 320 can be obtained. However, in any combination of the shape of the display window hole 126 and the cross-sectional shape of the light emitting tip portion 331b, in consideration of the light emitting area, there is a gap s around the entire circumference between the light emitting tip portion 331b and the display window hole 126. Is preferably ensured.

  Further, the end face shape of the light emitting tip 331b can be a flat surface or a spherical shape, but is preferably set so as to have a dimensional tolerance that does not protrude from the display window hole 126 to the outside of the housing 100. If the light emitting tip 331b does not protrude to the outside of the housing 100, not only the outer surface of the housing 100 can be easily cleaned, but also the light emitting tip 331b is scratched during cleaning or the pedestal 140 is held elastically by being pushed in force. It is possible to prevent the plate 143 and the connecting member 332 of the light guide assembly 330 from being damaged.

  Furthermore, although the elastic holding plate 143 is arranged between the light guides 331, the present invention is not limited to this. For example, when a large number of light emitting diodes 320 are arranged, the connecting members 332 are protruded to the left and right of the connected many light guides 331, and the elastic holding plate 143 presses the connecting members 332 protruding from the left and right. If it comprises, the mutual space | interval of the light guide 331 can be set narrow, and the occupation space of the light guide assembly 330 can be reduced. In the second embodiment, since the lighting light of the light emitting diode 320 is incident from the facing portion 331a, the light guide 331 does not necessarily have to be a prismatic shape, and a cylindrical shape is applied. It is also possible to do. However, when the cylindrical light guide 331 is applied, it is preferable that the groove portion 141 of the pedestal portion 140 is also configured to be a semicircular arc-shaped recess.

  Furthermore, although the inclined surface 142a is provided at the projecting end of the light shielding partition wall 142, the same effect can be obtained even if the entire length of the light shielding partition wall 142 has a flat cross-sectional shape. Is possible.

Embodiment 3 FIG.
FIG. 10 shows a cross section of the main part of an electronic apparatus according to Embodiment 3 of the present invention. As in the first embodiment, the electronic device exemplified here includes a housing 100 constituted by a pair of first case 110 and second case 120 on the left and right sides, and a circuit board 200 housed in the housing 100. In the first embodiment, the light emitting diodes 420A and 420B mounted on the circuit board 200, the display window hole 426 for making the lighting light of the light emitting diodes 420A and 420B visible to the outside, The structure of the light guides 431A and 431B for guiding the lighting light of the light emitting diodes 420A and 420B to the display window hole 426 is different from the structure of the base portion 440 provided in the second case 120.

  That is, in the third embodiment, five light emitting diodes 420A and 420B are mounted at equal intervals in the upper and lower two rows on the circuit board 200 in FIG. The light emitting diodes 420A in the first row located above are directly mounted on the circuit board 200 so that the respective light emitting surfaces are parallel to the opposite surface 200b of the circuit board 200. On the other hand, the second row of light emitting diodes 420B located below is configured such that each light emitting surface is orthogonal to the opposite surface 200b of the circuit board 200, and the connector is a right angle system. Applying things. As in the second embodiment, an auxiliary board is disposed so as to be orthogonal to the opposite surface 200b of the circuit board 200, and a light emitting diode 420B of a straight type is mounted on the auxiliary board, so that the second row of light emitting diodes is provided. 420B may be configured.

  On the front outer peripheral wall 122a of the second case 120, five display window holes 426 are provided at equal intervals in two rows on the left and right in FIG. The first row of display window holes 426 located on the right side correspond to the first row of light emitting diodes 420A, and the second row of display window holes 426 located on the left side are arranged on the second row. This corresponds to the light emitting diode 420B. Each of the display window holes 426 has a circular shape with the same inner diameter. The point that the thin portion 128 is provided in the portion where the display window hole 426 is formed in the front outer peripheral wall 122a is the same as in the first embodiment. The display window hole 426 is also similar to the first embodiment in that it is formed in a tapered shape so that the opening on the outer surface is wider than the opening on the inner surface.

  The light guides 431A and 431B are individually provided for the respective light emitting diodes 420A and 420B. The first row of light guides 431A corresponding to the first row of light emitting diodes 420A has a prismatic shape having a slope portion 431Aa at the base end and a light emitting tip 431Ab at the tip. The slope portion 431Aa is a flat surface that is inclined at an angle of 45 ° with respect to the longitudinal direction of the light guide 431A. In the light guide 431A, when the light from the light emitting diode 420A is incident from the side surface 431Ac of the base end portion, the light is orthogonally reflected by the slope portion 431Aa and guided to the light emitting tip portion 431Ab of the tip portion. The second row of light guides 431B corresponding to the second row of light emitting diodes 420B has a prismatic shape having a facing portion 431Ba at the base end and a light emitting tip 431Bb at the tip. The facing portion 431Ba is a plane having an angle of 90 ° with respect to the longitudinal direction of the light guide 431B. In the light guide 431B, the light emitted from the light emitting diode 420B incident from the facing portion 431Ba at the base end portion travels straight and is guided to the light emitting tip portion 431Bb at the tip portion.

  Furthermore, as shown in FIG. 11, the plurality of light guides 431 </ b> A and 431 </ b> B are integrated by a connecting member 432 to constitute a light guide assembly 430. The connecting member 432 is a prism having a thinner plate thickness than the light guides 431A and 431B, and is provided between the first row of light guides 431A and the second row of light guides 431B. The first row of light guides 431A are coupled to one side surface of the coupling member 432 in parallel with each other at equal intervals. The second row of light guides 431B are coupled to the other side surface of the coupling member 432 in a state of being parallel to each other at equal intervals. In the third embodiment, the first row of light guides 431A, the second row of light guides 431B, and the connecting member 432 are integrally formed of polycarbonate, which is a transparent resin material. As is clear from FIG. 11, both end portions of the connecting member 432 protrude from the row of light guides 431A and 431B, respectively.

  The light guides 431A and 431B have the same or larger cross-sectional area than the display window hole 426, and the light emitting tip portions 431Ab and 431Bb of the light guides 431A and 431B are as shown in FIG. The display window hole 426 has a circular cross section having an outer diameter smaller than the inner diameter of the display window hole 426 so as to be arranged with an annular gap s around the display window hole 426. The same as in the first embodiment.

  The pedestal portion 440 that holds the above-described light guide assembly 430 is provided so as to protrude toward the first case 110 from a portion of the side wall 121 of the second case 120 that is close to the front outer peripheral wall 122a. The pedestal portion 440 is provided with five groove portions 441 and a light-shielding partition wall 442 provided between the groove portions 441, and elastic holding plates 443 are provided at portions on both sides of the pedestal portion 440.

  The groove portion 441 is a concave portion formed at the protruding end portion of the pedestal portion 440. When the light emitting tip portions 431Ab and 431Bb of the light guides 431A and 431B are arranged to face the display window hole 426, each of them is the first. The base end portions of the light guide bodies 431A in the row and the base end portions of the light guide bodies 431B in the second row can be accommodated in a fitted state. The light shielding partition wall 442 is a portion protruding toward the first case 110 from the portion between the groove portions 441, and is molded of an opaque resin material. The light shielding partition wall 442 protrudes from between the light guides 431A and 431B when the side surfaces of the light guides 431A and 431B are brought into contact with the groove portion 441, and the positions where the respective front end portions approach the circuit board 200. It is formed so that The elastic holding plate 443 protrudes from the portions on both sides of the pedestal portion 440 toward the first case 110, and has a claw portion 443a at each distal end portion. The elastic holding plate 443 allows the light guide bodies 431A and 431B to be connected to the front outer peripheral wall via the connecting member 432 when the front ends of the light guide bodies 431A and 431B accommodated in the groove 441 are brought into contact with the front outer peripheral wall 122a. The light guides 431A and 431B can be restricted from moving away from the groove 441 by contacting the connecting member 432 so as to lightly press the inner surface of 122a and further engaging the claw portion 443a with the connecting member 432. It is provided as follows. In addition, about the structure similar to Embodiment 1 in another structure, the same code | symbol is attached | subjected and each detailed description is abbreviate | omitted.

  Also in the third embodiment, when the light guide assembly 430 is attached to the pedestal portion 440 of the second case 120, the light emitting tip portion 431Ab is attached to the display window hole from an oblique direction with respect to the inner surface of the front outer peripheral wall 122a. If the elastic holding plate 443 is pushed between the front outer peripheral wall 122a so that the connecting member 432 is slid from the inclined surface of the claw portion 443a after being positioned at 426, the elastic holding plate 443 is separated from the front outer peripheral wall 122a. Since the claw portion 443a at the tip is retracted by being bent in a straight line, the entire light guide assembly 430 is attached to the pedestal portion 440 without securing a space for moving the light guide assembly 430 inside the housing 100. Is possible. In particular, since the thin wall portion 128 is provided on the front outer peripheral wall 122a, the above-described operation can be easily performed. In addition, since the base portion 440 that supports the light guide assembly 430 and the display window hole 426 in which the light emitting tip portions 431Ab and 431Bb are arranged are provided in the same second case 120, the display window hole 426 is opposed to the display window hole 426. The light emitting tip portions 431Ab and 431Bb can be accurately arranged. The light guide assembly 430 attached to the pedestal 440 of the second case 120 is sandwiched between the inner surfaces of the front outer peripheral wall 122a so that the respective light guides 431A and 431B are lifted lightly upward by the elastic holding plate 443. At the same time, the claw portion 443a of the elastic holding plate 443 is engaged with the connecting member 432 so that the movement of the side surfaces of the light guides 431A and 431B away from the groove portion 441 is prevented.

  Therefore, the case 100 can be easily disassembled into the first case 110 and the second case 120, or the work when the case 100 is configured by assembling the first case 110 and the second case 120 can be easily performed. . Moreover, since the light guide assembly 430 does not fall off from the second case 120 during these operations, there is no possibility that the light guide assembly 430 may be damaged or lost. Furthermore, since the prismatic light guides 431A and 431B are arranged in a direction parallel to the circuit board 200, the size of the casing 100 is reduced without increasing the dimension in the direction orthogonal to the circuit board 200. Can be planned. Furthermore, since the light emitting diodes 420A and 420B can be mounted on the circuit board 200 in two rows, the length of one row can be suppressed. In this case, since the first case 110 supports the circuit board 200 and the second case 120 is provided with the display window hole 426, the light emitting diode 430 is assembled when the light guide assembly 430 is assembled to the second case 120. 420A and 420B do not get in the way, and even the light guide assembly 430 having a two-row structure can be easily held in the second case 120.

  When the light emitting diodes 420A and 420B mounted on the circuit board 200 are turned on, the annular gap s formed between the light emitting tip portions 431Ab and 431Bb and the light emitting tip portions 431Ab and 431Bb and the peripheral wall of the display window hole 426 is formed. Light is emitted to the outside of the housing 100 through the light source. That is, the light emitting tips 431Ab and 431Bb of the light guides 431A and 431B serve as the first light emitting surface, and the gap s between the light emitting tips 431Ab and 431Bb and the display window hole 426 serves as the second light emitting surface. For this reason, for example, even if there is a difference in production lots, it is possible to obtain a light emitting surface in which the first light emitting surface and the second light emitting surface are uniformly polymerized by the plurality of display window holes 426. Further, the light emitting areas of the light emitting diodes 420A and 420B as viewed from the front are the opening areas of the display window holes 426, and the display window holes 426 are set larger than the light emitting tip portions 431Ab and 431Bb of the light guides 431A and 431B. By doing so, the lighting visibility of the light emitting diodes 420A and 420B can be improved. In addition, when the display window hole 426 is set larger than the light emitting tips 431Ab and 431Bb of the light guides 431A and 431B, when the light guide assembly 430 is attached to the pedestal 440, the light emitting tips are viewed from an oblique direction. There is also an advantage that the work when the portions 431Ab and 431Bb are positioned in the display window hole 426 can be facilitated. Furthermore, since the display window hole 426 is tapered so that the opening area of the outer surface is larger than the inner surface of the front outer peripheral wall 122a, the reduction rate of the light emitting area when the line of sight is changed is suppressed, The visibility of the light emitting diodes 420A and 420B is improved.

  In addition, the light guide assembly 430 includes a connecting member 432 between the first row of light guides 431A and the second row of light guides 431B. Accordingly, since light leakage from between the light guides 431A and 431B is suppressed, for example, one of the adjacent light emitting diodes 420A and 420B in each column is turned on, and the other light emitting diodes 420A and 420B are turned off. In this case, it is possible to reliably recognize that the other light emitting diodes 420A and 420B are turned off.

  Further, the light shielding partition wall 442 formed of an opaque resin material protrudes from between the light guides 431A when the side surfaces of the light guide 431B are brought into contact with the groove portions 441, and the respective tip portions thereof are formed on the circuit board 200. It is provided so as to be close to each other. Therefore, not only can the light guides 431A and 431B be stably held with respect to the pedestal portion 440, but also direct light leakage between the adjacent light guides 431A and 431B in each row can be suppressed. In addition, in the first row of light guides 431A, it is also possible to prevent detour leakage light that enters from one light guide 431A to the other light guide 431A due to reflection from the circuit board 200.

  In the above-described third embodiment, the display window hole 426 is exemplified to be tapered so that the opening area of the outer surface is larger than the inner surface of the front outer peripheral wall 122a. The display window hole may be formed so that the opening area of the outer surface is the same. Further, although the circular display window hole 426 is provided, the opening shape of the display window hole 426 is not limited to a circular shape, and may be an arbitrary polygon. The same applies to the cross-sectional shapes of the light emitting tip portions 431Ab and 431Bb, and any polygonal shape may be used. Therefore, for example, if the opening shape of the display window hole 426 is changed according to the classification type of the display content, an identification means other than the color coding of the light emitting diodes 420A and 420B can be obtained. However, in any combination of the shape of the display window hole 426 and the cross-sectional shape of the light emitting front end portions 431Ab and 431Bb, the total area between the light emitting front end portions 431Ab and 431Bb and the display window hole 426 is considered in consideration of the light emitting area. It is preferable to secure a gap s around the circumference.

  Further, the end face shapes of the light emitting tip portions 431Ab and 431Bb can be flat or spherical, but are set so as to have a dimensional tolerance that does not protrude from the display window hole 426 to the outside of the housing 100. good. If the light emitting tip portions 431Ab and 431Bb do not protrude to the outside of the housing 100, not only the outer surface of the housing 100 can be easily cleaned, but also the light emitting tip portions 431Ab and 431Bb are scratched during cleaning, or the pedestal portion is pushed by force. It is possible to prevent the elastic holding plate 443 of 440 and the connecting member 432 of the light guide assembly 430 from being damaged in advance.

  Further, since the lighting light of the light emitting diodes 420B in the second row is incident from the facing portion 431Ba, the light guide 431B does not necessarily have to be a prismatic shape, and may be a cylindrical shape. Is possible. However, when the cylindrical light guide 431B is applied, it is preferable that the groove portion 441 of the pedestal portion 440 is also configured to be a semicircular arc-shaped recess.

  In addition, when two rows of light emitting diodes 420A and 420B are mounted on the circuit board 200, a straight type light emitting diode 420A is used as the first row of light emitting diodes 420A so that the light emitting surface is parallel to the opposite surface 200b of the circuit board 200. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 12, the light emitting surface of the first row of light emitting diodes 420 </ b> A ′ is orthogonal to the opposite surface 200 b of the circuit board 200, similar to the second row of light emitting diodes 420 </ b> B. You may comprise. In this case, a connector having a right-angle connector may be applied, or an auxiliary board is disposed so as to be orthogonal to the opposite surface 200b of the circuit board 200, and a straight-type light emitting diode 420A is provided on the auxiliary board. 'May be installed. However, when the first row of light emitting diodes 420A ′ having a light emitting surface orthogonal to the opposite surface 200b of the circuit board 200 is applied, the light emitting diodes 420A ′ are also guided in the same configuration as the second row. Needless to say, it is necessary to apply the light body 431B. In addition, in the modification of FIG. 12, the same code | symbol is attached | subjected about the structure similar to Embodiment 3. FIG.

  As described above, according to the present invention, a circuit board on which a plurality of light emitting diodes are mounted is housed in a housing, and a light guide assembly guides between a display window hole provided in the housing and a light emitting surface of the light emitting diode. Useful for electronic equipment that is designed to emit light.

  100 housing, 110 first case, 120 second case, 121 side wall, 122 outer peripheral wall, 122a front outer peripheral wall, 126 display window hole, 128 thin portion, 130 light guide assembly, 131 light guide, 131a slope Part, 131b light emitting tip part, 131c side surface, 132 connecting member, 140 base part, 141 groove part, 142 light shielding partition wall, 142a inclined surface, 143 elastic holding plate, 143a claw part, 200 circuit board, 200b opposite surface, 220 light emitting diode 320 Light-emitting diode, 330 Light-guiding assembly, 331 Light-guiding body, 331Ba facing portion, 331a facing portion, 331b Light-emitting tip portion, 332 Connecting member, 420A, 420B, 420A ′ Light-emitting diode, 426 Display window hole, 430 Light aggregate, 431A, 431B Light guide, 431Aa Slope Part, 431Ac side face, 431B light guide, 431Ba facing part, 432 connecting member, 440 base part, 441 groove part, 442 light shielding partition wall, 443 elastic holding plate, 443a claw part, s gap.

Claims (12)

A first case for supporting a circuit board on which a plurality of light emitting diodes are mounted side by side, a side wall and an outer peripheral wall orthogonal to each other, the side wall facing the circuit board, and the outer peripheral wall being the circuit board A second case assembled to the first case in a state of being arranged around the light guide, and a light guide provided corresponding to each light emitting diode, and the light emitted from each light emitting diode by each light guide. An electronic device adapted to emit light from a display window hole formed in the outer peripheral wall,
A plurality of light emitting diodes are arranged in two rows on the circuit board, and display window holes are formed in two rows on the outer peripheral wall corresponding to the light emitting diodes in each row,
A first row of light guides corresponding to the first row of light emitting diodes is disposed between the second row of light guides corresponding to the second row of light emitting diodes and the circuit board, and the first row and The second row of light guides are both arranged in parallel with the circuit board, and the light emitting diodes of the second row are mounted on the circuit board so that the light emitting surface is orthogonal to the component mounting surface of the circuit board. The second row of light guides has a confronting portion having an angle of 90 ° with respect to the longitudinal direction at the proximal end and a columnar shape having a light emitting distal end at the distal end. An electronic apparatus characterized in that light incident from a portion is guided to the light emitting tip.   A plurality of the light guides are integrated to form a light guide assembly, and the second case has an outer peripheral wall in which the display window holes are formed in a state where each light guide is parallel to the circuit board. The electronic apparatus according to claim 1, further comprising an elastic holding plate that sandwiches the light guide assembly therebetween.   The electronic apparatus according to claim 1, wherein a thin portion is provided in a portion of the outer peripheral wall where the display window hole is formed. The second case is provided with a pedestal portion protruding so as to be parallel to the outer peripheral wall, and a plurality of groove portions accommodated in a state where the respective light guides are fitted to the protruding end portion of the pedestal portion. Furthermore, the elastic holding plate restricts movement in a direction away from the groove portion of the pedestal portion by engaging the light guide assembly in a state where the light guide body is accommodated in the groove portion. The electronic device according to claim 2 , further comprising a claw portion.   The light guide has a cross-sectional area equal to or larger than the opening area of the display window hole, and the light emitting tip provided at the tip is arranged with a gap around the display window hole. The electronic device according to claim 1, wherein the electronic device is a device. The first row of light emitting diodes are mounted on the circuit board such that the light emitting surface is parallel to the component mounting surface of the circuit board,
The first row of light guides has a prismatic shape with a slope at an angle of 45 ° with respect to the longitudinal direction at the base end and a prism shape with a light emitting tip at the tip, and the side surface of the base end 2. The electronic device according to claim 1, wherein the light incident from the light is orthogonally reflected by the slope portion and guided to the light emitting tip portion. The first row of light emitting diodes is mounted on the circuit board such that the light emitting surface is orthogonal to the component mounting surface of the circuit board,
The first row of light guides has a confronting portion having an angle of 90 ° with respect to the longitudinal direction at the base end, and has a columnar shape having a light emitting front end portion at the distal end, and is incident from the confronting portion. The electronic apparatus according to claim 1, wherein light is guided to the light emitting tip.   The electronic apparatus according to claim 1, wherein a light guide assembly is configured by connecting the light guides of the first row and the light guides of the second row to each other by a connecting member.   The electronic device according to claim 8, wherein the light guide assembly is configured such that a connection member is provided at a position unevenly distributed in the thickness direction of the light guide to connect the light guides to each other. . The light guide assembly is supported by the second case so that a front end surface of the light emitting front end portion is equal to or less than an outer surface of an outer peripheral wall in which the display window hole is formed. Electronics.   11. The electronic device according to claim 1, wherein the display window hole is formed so that an opening area of an outer surface is larger than an inner surface of the outer peripheral wall. The pedestal portion is provided with a light shielding partition wall made of an opaque resin material between the plurality of groove portions,
The said light-shielding partition wall has a dimension more than the thickness dimension of the said light guide, and formed so that a protrusion end part may become narrower than a base end part. Electronics.

Images