JP2011066951A - Charger with pilot lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charger with a pilot lamp, capable of giving a lightup state to be seen readily, by restraining a light from leaking to the outside. <P>SOLUTION: The charger with a pilot lamp includes a circuit board 13 for mounting electronic components which configures a charging circuit 10; a case for incorporating the circuit board 13; a pilot lamp disposed inside the case and irradiating a part of the case as a lightup area LA with a light and transmitting the light to the outside; and a lamp-fixing cylinder 14; fixed on the circuit board 13 and having the pilot lamp in the hollow inside. The charger can display the state of charging an object to be charged by the lightup state of the pilot lamp; the pilot lamp comprises a light-emitting diode having a light-emitting portion 6A, the lamp-fixing cylinder 14 includes a closing portion 7 for closing an opening end of the upper surface; and the closing portion 7 is able to open an opening window 8, at a position corresponding to the light-emitting portion 6A of the light-emitting diode fixed in the lamp-fixing cylinder 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a charger capable of floating a lighting pattern on a case surface with a pilot lamp made of a light emitting diode.

  The charger turns on the pilot lamp and displays various states. For example, changing the lighting pattern or lighting color of the pilot lamp to indicate the completion of charging during the remaining battery capacity or during charging. As a light source for such a pilot lamp, a light emitting diode (hereinafter also referred to as “LED”) having a long life and low power consumption is used.

  Conventionally, such a pilot lamp has been fixed so as to be exposed through an opening window 83 opened in the case 81 as shown in FIG. Thereby, the light emission and lighting state of LED82 can be reliably visually recognized from the outside. However, with this method, water droplets, dust, or static electricity may enter the case through the gap between the opening window 83 and the LED 82, which may adversely affect the electronic circuit inside the case 81.

  In order to prevent this, an electronic device is disclosed in which a lighting state is raised on the surface through the case without providing an opening window in the case (see Patent Document 1). This electronic apparatus is shown in an exploded perspective view of FIG. 18 and an enlarged cross-sectional view of FIG. In the electrical equipment shown in these drawings, the LED 92 causes the outer surface of the translucent portion 93 of the case 91 to emit light in a specific shape and displays lighting. The case 91 is formed of a light-transmitting plastic and protrudes from the inner surface of the light-transmitting portion 93 so as to integrally form a cylindrical rib 94 having a specific shape. The LED 92 is disposed at a position where light is irradiated inside the cylindrical rib 94. Further, a light shielding tube 95 is covered on the outer surface of the cylindrical rib 94. The light shielding tube 95 is a flexible heat-shrinkable tube colored in a dark color such as black, and is attached to the outside of the cylindrical rib 94 and fixed. Providing such a light shielding tube 95 prevents light from passing through the cylindrical rib 94 and blurring the shape of the light emitting region 96.

  However, since this electronic device causes the LED to emit light in a heart shape or the like, a part of the case is made translucent, so that there is a problem that processing of the case becomes troublesome. In addition, since this electronic device has a surface mount type (SMD type) LED chip mounted on the circuit board as a light emitting diode, the light from the LED chip is easily diffused, and the diffused light is not only upward, Also emitted to the side. As a result, there is a possibility that light leaks to the outside from the side surfaces of the light shielding tube and the circuit board on the side surface of the LED chip. In particular, in the configuration of FIGS. 18 and 19, since the light shielding tube is fixed to the upper case side, a gap is inevitably generated between the light shielding tube and the circuit board due to design tolerances and clearances.

  Further, as shown in FIG. 20, a configuration in which a cylindrical rib 84 is provided on the circuit board side is also conceivable. However, in this configuration as well, since a gap is generated between the cylindrical rib 84 and the upper case 81B, there is a possibility that light leaks from here to the outside. The light leaking from the side surface of the LED 82 causes the light to float on an unintended portion of the charger case, which deteriorates the appearance. In FIG. 20, as a result of light leaking in the direction indicated by the broken line, the bottom surface portion BS of the charger shines, which significantly deteriorates the appearance of the lighting state.

JP 2009-128674 A JP 2008-71919 A

  The present invention has been made to solve such conventional problems. A main object of the present invention is to provide a charger with a pilot lamp that can suppress light leaking to the outside and display it in an easy-to-see lighting state.

Means for Solving the Problems and Effects of the Invention

  In order to achieve the above object, according to the charger with a pilot lamp according to the first aspect of the present invention, a circuit board on which electronic components constituting a charging circuit are mounted, a case incorporating the circuit board, A pilot lamp that is disposed inside the case and irradiates light with a part of the case as a lighting region and is transmitted to the outside, and is fixed on the circuit board, and the pilot lamp is disposed in a hollow interior A lamp fixing cylinder, and a pilot lamp-equipped charger capable of displaying a state of charging an object to be charged in a lighting state of the pilot lamp, wherein the pilot lamp is composed of a light emitting diode having a light emitting portion, The lamp fixing tube includes a closing portion that closes an opening end on an upper surface, and the closing portion emits light of the light emitting diode fixed in the lamp fixing tube. Min and can be opened an opening window at a corresponding position. This effectively guides light from the light-emitting diodes to the lighting area of the case through the opening window opened in the closed part, while effectively preventing light leakage to the side etc. at the lamp fixing cylinder and closed part. Therefore, it is possible to realize a good-looking lighting display in which a lighting pattern is displayed only at an intended portion.

  Moreover, according to the charger with a pilot lamp which concerns on the 2nd side surface of this invention, the said light emitting diode can be used as a bullet-type light emitting diode element. Thereby, it is possible to realize a high-quality lighting display capable of effectively irradiating only a desired position by using a bullet-type light emitting diode having excellent directivity.

  Furthermore, according to the charger with a pilot lamp which concerns on the 3rd side surface of this invention, the said opening window can be set smaller than the maximum outer diameter of the said light emission part. As a result, only the component with high linearity of light from the light emitting diode can be output through the aperture window, and the component scattered around can be shielded by the lower surface of the periphery of the aperture window. It is possible to enhance the effect of preventing light leakage to other parts while keeping clear.

  Furthermore, according to the charger with a pilot lamp which concerns on the 4th side surface of this invention, the opening window of the said obstruction | occlusion part and the light emission part of the said light emitting diode can be spaced apart. Thereby, since it fixes to the attitude | position which does not protrude a light emission part from an opening window, the leakage of the light which is not intended to the side surface direction of a lamp | ramp fixing cylinder can be prevented reliably.

  Furthermore, according to the charger with a pilot lamp according to the fifth aspect of the present invention, the case can be formed with a thinner case thickness in the lighting region than in other portions. Thereby, it becomes easy to transmit the light of a light emitting diode only by a lighting area | region, and it becomes possible to light-emit the part of a lighting area | region effectively.

  Furthermore, according to the charger with a pilot lamp according to the sixth aspect of the present invention, the lamp fixing tube can function as an LED spacer that defines a height at which the light emitting diode is fixed. As a result, the LED spacer for positioning the light emitting diode can also be used as a lamp fixing tube, and the number of components can be reduced to realize a high quality lighting state at low cost.

  Furthermore, according to the charger with a pilot lamp concerning the 7th side surface of this invention, the said obstruction | occlusion part can be fixed in the attitude | position bent by the side surface side from the opening part of the said lamp fixing cylinder. Thereby, the opening end of the lamp fixing tube can be closed without a gap, and unnecessary light leakage can be effectively prevented.

It is a top view which shows the charger with a pilot lamp which concerns on Example 1. FIG. It is the perspective view which shows the time of pilot lamp extinction which looked at the charger of FIG. 1 from diagonally downward. It is a perspective view which shows the time of the pilot lamp extinguishing of the charger of FIG. It is the external appearance perspective view which looked at the charger of FIG. 1 from diagonally upward. It is a perspective view which shows the state which removed the upper case with the charger of FIG. It is a perspective view which shows the state which removed the upper case with the charger of FIG. It is sectional drawing in the VII-VII line of FIG. 1 which shows the state which set the AA battery to the charger of FIG. It is sectional drawing which shows the state which set the AAA battery in the charger of FIG. It is sectional drawing in the IX-IX line of FIG. It is an expanded sectional view which shows the opening window vicinity of FIG. It is the perspective view which looked at the cross section of FIG. 10 from diagonally upward. It is the disassembled perspective view which expanded a part of FIG. It is a disassembled perspective view which shows the lamp fixing cylinder of FIG. It is a circuit diagram which shows a charging circuit. It is a schematic diagram which shows the fixing structure using the obstruction | occlusion part made longer than the lamp fixing cylinder upper surface which concerns on a modification. It is a schematic diagram which shows the fixing structure using the obstruction | occlusion part made longer than the lamp fixing cylinder upper surface which concerns on a modification. It is a schematic cross section which shows the fixing structure of the conventional pilot lamp. It is a disassembled perspective view of the conventional electronic device. It is an expanded sectional view of the electronic device of FIG. It is a schematic cross section which shows the other structure which provides a light shielding tube in the circuit board side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a charger with a pilot lamp for embodying the technical idea of the present invention, and the present invention does not specify the charger with a pilot lamp as the following. In addition, the member shown by the claim is not what specifies the member of embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the description unless otherwise specified. It's just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.

  1 to 14 show a charger with a pilot lamp according to the first embodiment. In these drawings, FIG. 1 is a plan view showing a charger with a pilot lamp according to the first embodiment, FIG. 2 is an external perspective view showing the charger in FIG. FIG. 4 is an external perspective view of the charger of FIG. 1 when the pilot lamp is lit, FIG. 4 is an external perspective view of the charger of FIG. 1 viewed obliquely from above, and FIG. 5 is a state where the upper case is removed from the charger of FIG. 6 is a perspective view showing a state in which the upper case is removed by the charger of FIG. 4, FIG. 9 is a sectional view taken along line IX-IX of FIG. 1, and FIG. 7 is taken along line ii of FIG. It is sectional drawing, Comprising: A sectional view which shows the state which set the AA battery in the battery mounting part, FIG. 8 is sectional drawing which shows the state which set the AAA battery instead of the AA battery, FIG. 10 is opening of FIG. FIG. 11 is a perspective view of the cross section of FIG. 10 as viewed obliquely from above, and FIG. Exploded perspective view enlarging a part of FIG. 13 is a lamp exploded perspective view of the fixed barrel 11, FIG. 14 is a circuit diagram of the charging circuit, respectively.

  In addition, in Example 1, the charger which charges a commercially available AA battery and an AAA battery is shown. However, the present invention is not limited to this charger. For example, a charger using a dedicated battery such as a mobile phone, a portable music player, or a portable information terminal, or a charger that is connected directly to a device instead of a battery for charging. Needless to say, it can also be applied to a charger for an emergency quick charger.

  A charger 100 with a pilot lamp shown in FIG. 1 to FIG. 11 includes a case 1 in which a battery mounting portion 2 is provided so that a plurality of rechargeable cylindrical batteries 3 are arranged in parallel so as to be detachable. The cylindrical battery 3 is detected by detecting the charging state of the charging circuit of the cylindrical battery 3 set in the battery mounting part 2 and the charging circuit for charging the battery set in the battery mounting part 2. And a pilot lamp that displays the state of charge in a light emission state.

As shown in FIGS. 7 and 8, the charger 100 sets the cylindrical battery 3 as the AA battery 3A and the AAA battery 3B, and sets both the AA battery 3A and the AAA battery 3B in the battery mounting portion 2. And charge. However, the battery charger of the present invention does not specify cylindrical batteries as AA batteries and AAA batteries. Cylindrical batteries can be AA batteries only, AA batteries only, or any cylindrical batteries that are not AA batteries or AAA batteries.
(Case 1)

  The case 1 is formed in a substantially rectangular shape as a whole. The case 1 is made of plastic, and is manufactured by separately molding the lower case 1B and the upper case 1A with plastic. The upper case 1A is connected so as to close the opening of the lower case 1B, and the charging circuit 10 (FIG. 14) is built therein. Case 1 is provided with a recess in upper case 1 </ b> A to form battery mounting portion 2.

The upper case 1A is formed of a light-transmitting plastic. For example, it is made of polycarbonate resin or ABS / polycarbonate resin. Since the polycarbonate-based resin has translucency, it is convenient for exposing the internal light to the outside. Further, in order to color the case 1 in a desired color, a pigment or the like is mixed with the resin. In this example, a white pigment (for example, titanium oxide such as TiO ₂ ) is mixed to make the case 1 white.

  On the other hand, the lower case 1B is formed of a resin such as plastic that does not transmit light. For example, it is made of ABS resin. Thereby, the light of the pilot lamp can be exposed only from the upper case 1A.

Furthermore, as shown in FIGS. 10 and 11, the upper case 1A is formed such that the case thickness t ₁ in the portion of the lighting area LA is thinner than the case thickness t ₂ in other portions. Accordingly, it is possible to easily transmit the light of the pilot lamp only by the lighting area LA, and it is possible to effectively emit the light area LA as shown in FIG. The thin portion is preferably formed to have a shape corresponding to the light emitting portion 6A of the LED element 6 constituting the pilot lamp. In the example of FIG. 10, the upper case 1 </ b> A is recessed in a concave shape curved in a dome shape so as to correspond to the spherical light emitting portion 6 </ b> A. As a result, the distance between the light emitting portion 6A and the inner surface of the case is brought closer to a uniform direction, so that the light from the light emitting portion 6A can be reliably received by the inner surface of the case, and the lighting area LA can be emitted uniformly and brightly. . In this way, the case is not opened directly in the lighting area LA, but by incorporating the LED element, foreign matter such as dust and water droplets can be prevented from entering through the gap in the opening, and electrons caused by the intrusion of static electricity can be prevented. Damage to parts can be avoided.

  The upper case 1A is provided with a battery mounting portion 2 by forming a concave portion on the upper surface. On the other hand, the lower case 1B is connected to the upper case 1A so as to close the lower opening of the upper case 1A. The upper case 1A and the lower case 1B are connected to each other at their peripheral walls to form a closed structure. As shown in FIGS. 5 and 6, the lower case 1 </ b> B has a circuit board 13 fixed inside the peripheral wall. The circuit board 13 fixes the output terminals 11 and 12 exposed to the battery mounting portion 2, and further mounts electronic components that realize the charging circuit 10 in contact with the output terminals 11 and 12. The LED element 6 that emits light upward from the opening window is fixed.

  The case 1 is provided with a battery mounting portion 2 in the upper case 1A for setting the rechargeable cylindrical battery 3 so as to be removable. The case 1 shown in FIG. 2 is provided with a recess in the lower portion of the upper case 1A in the figure to form the battery mounting portion 2, and a space for storing the electronic components of the charging circuit 10 is provided inside the battery mounting portion 2 above. Yes. The case 1 of FIGS. 2 and 4 is provided with a battery mounting portion 2 in which four cylindrical batteries 3 can be set in parallel. Further, a transparent cover or the like that closes the opening of the battery mounting portion 2 may be added. The transparent cover can be connected to the case so that the opening of the battery mounting portion can be opened and closed. The battery mounting part is closed with a transparent cover, and the battery can be charged without removing the cylindrical battery. However, the transparent cover is not essential, and by charging the battery with the battery mounting portion opened, the cylindrical battery can be charged while efficiently dissipating heat during charging.

  As shown in FIGS. 2 and 4, the battery mounting portion 2 is provided with four rows of mounting portions 20 so that four cylindrical batteries 3 can be set in parallel. The battery mounting portion 2 is provided with four rows of mounting portions 20 by providing side walls 21 on both sides and three rows of partition walls 22 in parallel. The two rows of mounting portions 20 are provided between the side wall 21 and the partition wall 22, and the middle two rows of mounting portions 20 are provided between the three rows of partition walls 22. Each mounting portion 20 has a shape in which both the AA battery 3A and the AAA battery 3B, which are cylindrical batteries 3, can be set. Since the AA battery 3A is thicker and longer than the AAA battery 3B, the mounting portion 20 has an AA battery 3B inside at one end, in the figure, at the negative end of the cylindrical battery 3. Is provided with a step portion 23 on which the AA battery 3A is placed. The thin and short AAA battery 3 </ b> B is set on the lower stage inside the step part 23, and the thick and long AA battery 3 </ b> A is set on the upper stage outside the step part 23.

  As shown in FIGS. 2 and 4, the case 1 has output terminals 11 and 12 that are in contact with positive and negative end electrodes of the cylindrical battery 3 at both ends of the mounting portion 20 of the battery mounting portion 2. . A common output terminal 11 that is in contact with the positive electrodes of both the AA battery 3A and the AAA battery 3B is disposed at the end on the plus side. An output terminal 12A that comes into contact with the negative electrode of the AA battery 3A and an output terminal 12B that comes into contact with the negative electrode of the AA battery 3B are separately arranged at the negative end. The output terminal 12A that comes into contact with the negative electrode of the AA battery 3A is arranged at the upper stage of the step portion 23, and the output terminal 12B that comes into contact with the negative electrode of the AA battery 3B is arranged at the lower stage of the step portion 23. In the AA battery 3 </ b> A set in the mounting portion 20, the plus electrode is brought into contact with the common output terminal 11, and the minus electrode is brought into contact with the output terminal 12 </ b> A arranged at the upper stage of the step portion 23. In the AAA battery 3 </ b> B, the plus electrode is brought into contact with the common output terminal 11, and the minus electrode is brought into contact with the output terminal 12 </ b> B arranged at the lower stage of the step portion 23. The AA batteries 3 </ b> A and the AAA batteries 3 </ b> B are charged by contacting the plus electrode with the common output terminal 11 and the minus electrode with the output terminal 12 provided at the stepped portion 23.

  The charging circuit charges the AA batteries 3 </ b> A and AAA batteries 3 </ b> B of the cylindrical battery 3 through the positive and negative output terminals 11 and 12. A circuit example of the charging circuit is shown in FIG. The charging circuit 10 charges the cylindrical battery 3 until it is fully charged, detects full charge, and stops charging. The charging circuit 10 is charged with a current and voltage optimum for the type of the cylindrical battery 3. The charging circuit 10 for charging the AA batteries 3A and the AAA batteries 3B includes a charging circuit 10A for the AA batteries 3A and a charging circuit 10B for the AA batteries 3B. The AA batteries 3A and the AAA batteries 3B are alkaline batteries such as nickel metal hydride batteries or nickel cadmium batteries. These alkaline batteries are fully charged by constant current charging. The charging circuit 10 detects the peak voltage of the battery being charged, or detects that the voltage has dropped by ΔV from the peak voltage and determines that the battery is fully charged. Since the AA battery 3A and the AAA battery 3B have different optimum charging currents, the charging circuit 10 controls the charging current to the optimum current to charge the AA batteries 3A and the AAA batteries 3B.

  The circuit shown in FIG. 14 includes a control circuit 15 that controls blinking of the LED element 6. The control circuit 15 detects the charging state of the cylindrical battery 3 and controls the lighting state of the LED element 6. For example, the control circuit 15 turns on the LED element 6 in a state in which the cylindrical battery 3 is charged. When the cylindrical battery 3 is fully charged, the LED element 6 is turned off to display full charge. Further, the control circuit 15 can continuously turn on the LED element 6 while the cylindrical battery 3 is charged, and after the battery is fully charged, the LED element 6 can blink to display the full charge. . Further, the control circuit 15 can blink the LED element 6 in a state where the cylindrical battery 3 is charged, and can display the full charge by continuously lighting the LED element 6 after being fully charged. .

The charger 100 in which a plurality of cylindrical batteries 3 are set independently detects the full charge of each cylindrical battery 3 and controls to stop charging the fully charged cylindrical battery 3, All the cylindrical batteries 3 can be charged in an ideal state. In particular, even when a plurality of cylindrical batteries 3 having different remaining capacities are set, any of the batteries can be fully charged without being overcharged. In this charger, all the cylindrical batteries 3 are not fully charged at the same time. The lighting area LA is provided for each cylindrical battery 3, and the state of charge of each cylindrical battery 3 can be displayed individually.
(Lighting area LA)

The charger 100 is provided with a lighting area LA that emits light during charging and displays a charging state. The lighting areas LA are provided corresponding to the respective cylindrical batteries. In the illustrated example, four lighting areas LA are provided for four cylindrical batteries. As shown in FIG. 2, each lighting area LA is not visually recognized from the outside when it is turned off, so that it is surprising. At the time of lighting, as shown in FIG. 3, the LED element 6 which is a pilot lamp provided inside the case 1 is turned on, and a lighting area LA appears at a specific part of the case surface. The lighting area LA has a predetermined shape, preferably a circular shape. However, it is needless to say that a desired shape such as an elliptical shape, a star shape, or a figure schematically representing a battery can be used. As described above, the lighting area LA is realized by forming the thickness t ₁ of the portion corresponding to the lighting area LA on the upper surface of the case 1 to be thin. In addition, this portion may be formed of a translucent member, or the lighting area may be colored white on the inner surface of the case, or the area other than the lighting area may be colored black.
(Pilot lamp)

The pilot lamp is composed of a light emitting diode. This light emitting diode utilizes a bullet-type (lamp type) LED element 6. The bullet-type light emitting diode is excellent in directivity compared to the SMD type and the like, and can concentrate output light on the lighting area LA facing the light emitting portion 6A of the LED element 6. The bullet-type LED element 6 is fixed on the circuit board 13. In the example of the exploded perspective view of FIGS. 5 and 6, two LED elements 6 are mounted as a set on the circuit board 13 so as to be separated from each other, and each set of LED elements 6 is surrounded by a lamp fixing cylinder 14. It is fixed so that it surrounds.
(Lamp fixing tube 14)

  The lamp fixing cylinder 14 is a hollow cylinder, and is fixed on the circuit board 13 with the LED element 6 inserted therein. In the example of FIG.10 and FIG.11, it is set as the rectangular shape which chamfered the cross section so that the two LED elements 6 can be accommodated. The lamp fixing tube 14 is made of an insulating member, and insulates from the adjacent output terminal 12. Such a lamp fixing cylinder 14 can be made of a resin such as plastic. Moreover, it colors with the color which absorbs light, such as black, so that the light of the internal LED element 6 may not leak. Or conversely, the inner surface of the lamp fixing tube may be colored in silver or the like having a high reflectance. This lamp fixing cylinder functions as a lamp reader for guiding the light of the LED element in the extending direction of the lamp fixing cylinder.

  FIG. 12 is an exploded perspective view in which a part of FIG. 6 is enlarged. In this figure, the LED element 6 on the left side is covered with a lamp fixing cylinder 14, and the LED element 6 on the right side shows a state in which the lamp fixing cylinder is removed for explanation. As shown in this figure, a set of two LED elements 6 are mounted side by side between output terminals 12. Thereby, the arrangement space of the LED element 6 can be efficiently secured inside the case 1. Further, by using a pair of leads 6 </ b> B protruding from the bottom surface of the bullet-type LED element 6, the light emitting part (bullet part) 6 </ b> A of the bullet-type LED element 6 is held in a posture protruding upward from the circuit board 13. In this way, by separating the LED light emitting portion 6A from the circuit board 13 and holding it close to the inner surface of the case 1, strong light is irradiated to the case from a short distance, and brighter light is emitted to the lighting area LA. It can be expressed.

In addition, it is preferable that the light emitting portions 6A of the LEDs are fixed at the same height so that the four lighting areas LA that are exposed by the lighting of the four LED elements 6 have substantially the same brightness. In particular, since the two LED elements 6 included in the same lamp fixing tube 14 are adjacent to each other, if the brightness is different because the heights are not uniform, the brightness of the adjacent lighting areas varies at the time of lighting, and it looks good. Make it worse. For this reason, it is preferable to provide an LED spacer for defining the height of the LED element 6. In the example of FIGS. 9 to 11, a flange portion 14 </ b> A having a partially narrowed inner diameter is provided inside the lamp fixing tube 14, and the LED light emitting portion 6 </ b> A is not positioned below the flange portion 14 </ b> A. is doing. In this way, the lamp fixing tube can also function as an LED spacer.
(Occlusion part 7)

  The upper surface of the lamp fixing cylinder 14 is closed by the closing portion 7. The blocking portion 7 is also colored in a dark color such as black, like the lamp fixing tube 14. The closing portion 7 has an opening window 8 at a position corresponding to the light emitting portion 6 </ b> A of the LED element 6. As shown in FIGS. 12, 11, etc., two opening windows 8 are opened in the closing portion 7 corresponding to each LED element 6. The opening window 8 is formed according to the planar shape of the LED element 6 and the shape of the lighting area LA. Preferably, the circular or cylindrical LED element 6 has a circular opening according to the light emitting portion 6A. The opening inner diameter d of the opening window 8 is set smaller than the maximum outer diameter D of the light emitting portion 6A of the LED element 6 as shown in FIG. By designing in this way, excess output light from the LED element 6 is cut on the inner surface of the opening window 8 of the closing portion 7, and leakage of light to the side surface is suppressed. As a result, as shown in the cross section of FIG. 10, light leaking to the side surface is suppressed from the gap between the inner surface of the upper case 1A and the upper surface of the lamp fixing tube 14, and unintended light is transmitted from the bottom surface and side surface of the case. The situation of leakage can be solved. In particular, among the components of the output light of the LED element 6, only component light having high straightness can be output through the aperture window 8, while component light scattered around can be shielded by the lower surface of the periphery of the aperture window 8. As described above, it is possible to enhance the effect of preventing light leakage to unintended parts while increasing the display contrast in the lighting area LA.

  Further, as shown in FIG. 10, the opening window 8 of the closing portion 7 and the light emitting portion 6 </ b> A of the LED element 6 are separated from each other. That is, the LED element 6 is fixed in the lamp fixing tube 14 so that the light emitting portion 6A is positioned lower than the surface of the opening window 8. Thereby, the light which goes to the side surface direction of a lamp fixing cylinder from the LED element 6 can be completely blocked by the inner surface of the edge of the opening window 8, and leakage of light to the bottom surface portion BS of the case 1 can be reliably prevented. Preferably, the light emitting portion 6A is designed in advance so that the height of the upper surface of the light emitting portion 6A is lower than the opening window 8 in a state where the light emitting portion 6A of the LED element 6 is mounted on the upper surface of the flange portion 14A. Thereby, positioning of the height of the LED element 6 can be performed easily.

  FIG. 13 is an exploded perspective view of the lamp fixing cylinder 14 shown in FIG. As shown in this figure, the closing part 7 is in the form of a plate or a seal and closes the upper surface of the lamp fixing tube 14. In particular, the sealing-like blocking portion 7 can be easily fixed by sticking with the surface facing the lamp fixing cylinder 14 as an adhesive surface. The closing portion 7 has the same size as the upper surface of the lamp fixing cylinder 14.

  Alternatively, as a modified example, as shown in FIGS. 15 and 16, a closing portion 7 </ b> B that is longer than the upper surface of the lamp fixing tube 14 is used to close the upper surface of the lamp fixing tube 14, and the left and right sides are bent. The upper surface of the lamp fixing cylinder 14 may be covered in a shape. As a result, it is possible to reliably fix the blocking portion 7B and prevent a gap from being formed between the blocking portion 7B and the upper surface of the lamp fixing cylinder 14, and thus light leakage can be more reliably reduced.

  However, these configurations are merely examples, and other configurations can be used as appropriate. For example, the opening portion may be opened by integrally forming the upper surface of the lamp fixing cylinder without using the closing portion as a separate member from the lamp fixing cylinder.

  As described above, at the rear end portion of the case 1 shown in FIG. 2 and FIG. 3, while the pilot lamp is displayed only in the lighting region, the light leaks from the bottom portion BS of the case rear end and the battery mounting portion side. It can effectively prevent situations that appear.

  The charger with a pilot lamp according to the present invention charges a standard battery charger such as an AA battery or AAA battery, a dedicated battery for a mobile phone or a portable music player, an emergency charger, etc. Therefore, it can be suitably used as a charger.

DESCRIPTION OF SYMBOLS 100 ... Charger 1 ... Case; 1A ... Upper case; 1B ... Lower case 2 ... Battery mounting part 3 ... Cylindrical battery; 3A ... AA battery; 3B ... AAA battery 6 ... LED element; 6A ... Light emission part; ... Lead 7, 7B ... Closure 8 ... Opening window 10 ... Charging circuit; 10A ... AA battery charging circuit; 10B ... AAA battery charging circuit 11 ... Output terminal 12 ... Output terminal; 12A ... AA battery output Terminal: 12B ... AAA battery output terminal 13 ... Circuit board 14 ... Lamp fixing cylinder; 14A ... Flange 15 ... Control circuit 20 ... Mounting part 21 ... Side wall 22 ... Septum 23 ... Step part 81 ... Case 81B ... Upper case 82 ... LED
83 ... Opening window 84 ... Cylindrical rib 91 ... Case 92 ... LED
93 ... opening inner diameter of the transparent portion 94 ... tubular rib 95 ... shielding tube 96 ... light emitting region LA ... lighting region t ₁ ... lighting area portion of the case the thickness t ₂ ... non-illuminated area portion casing thickness d ... opening window D: Maximum outer diameter BS of the light emitting part of the LED element ... Bottom part

Claims (7)

A circuit board on which electronic components constituting the charging circuit are mounted;
A case containing the circuit board;
A pilot lamp that is disposed inside the case and irradiates light with a part of the case as a lighting region and transmits the light to the outside;
A lamp fixing cylinder fixed on the circuit board and having the pilot lamp disposed inside a hollow,
A charger with a pilot lamp capable of displaying the state of charging an object to be charged by the lighting state of the pilot lamp,
The pilot lamp is composed of a light emitting diode having a light emitting portion,
The lamp fixing cylinder includes a closing portion that closes the opening end of the upper surface,
The battery charger with a pilot lamp, wherein the closing portion is formed by opening an opening window at a position corresponding to a light emitting portion of the light emitting diode fixed in the lamp fixing tube. The charger with a pilot lamp according to claim 1,
A battery charger with a pilot lamp, wherein the light emitting diode is a bullet-type light emitting diode element. A charger with a pilot lamp according to claim 1 or 2,
The charger with a pilot lamp, wherein the opening window is set smaller than a maximum outer diameter of the light emitting portion. A charger with a pilot lamp according to any one of claims 1 to 3,
A battery charger with a pilot lamp, wherein the opening window of the closing portion and the light emitting portion of the light emitting diode are separated from each other. A charger with a pilot lamp according to any one of claims 1 to 4,
The charger is provided with a pilot lamp, wherein the case is formed at a portion of the lighting region where the case thickness is thinner than other portions. A charger with a pilot lamp according to any one of claims 1 to 5,
The charger with pilot lamp, wherein the lamp fixing cylinder functions as an LED spacer that defines a height at which the light emitting diode is fixed. A charger with a pilot lamp according to any one of claims 1 to 6,
A battery charger with a pilot lamp, wherein the closing portion is fixed in a posture bent from the opening portion of the lamp fixing tube to the side surface side.

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