JP6546865B2 - Light bulb shaped lighting device - Google Patents

Description

  The present invention relates to a light bulb shaped lighting device.

  A bulb-type lighting device provided with a light-emitting body having a semiconductor element such as a LED (Light Emitting Diode) can be extended in life and energy saving as compared with an incandescent light bulb, and thus has attracted attention in recent years. In the bulb-type lighting apparatus using the LED, a structure having an assemblability that improves productivity because the spread of the technology has rapidly advanced is desired.

  For example, in Patent Document 1, a substrate on which a solid light emitting element is disposed on one end side, a main body on which an accommodation portion is provided inside and the substrate is disposed on one end side, and a locking portion on an outer end portion on one end side An insulating case in which at least a part is housed in the housing portion of the main body, and a locked portion at an open end portion, the locked portion being locked by the locking portion and the substrate A translucent cover member provided on one end side of the main body so as to cover, a lighting device disposed inside the insulating case for lighting the solid light emitting element, and a base member provided on the other end side of the main body It is described that the base member is provided on the outer peripheral surface of the insulating case.

JP, 2013-235849, A

  In the configuration described in Patent Document 1, when the locked portion of the insulating case is locked to the locking portion of the cover member, manufacturability (assemblability) is better than that using an adhesive for fixing the both. According to the dimensional accuracy of the base member and the main body, the position of the locking portion in the insulating case in the direction of the base-cover member (vertical direction) in a state where the insulating case is accommodated in the main body and the base member is provided. There is a possibility that dimensional accuracy may not be achieved. If the positional dimension accuracy of the locking portion is not sufficient, the locking between the locking portion and the locked portion of the cover member may be insufficient, and the cover member may be dropped.

  An object of the present invention is to provide a self-ballasted lighting device with good assembly.

In order to solve the above problems, a main body, a storage case in which at least a part is stored in the main body, a light emitter provided on one end side of the main body, an inner holder, a cover member, and the other end of the main body A base attached to the storage case at a side, the inner holder being capable of locking the cover member, the inner holder comprising a plate portion positioned in a groove of the main body , the main body being With the cap attached to the storage case, an inner holder having a locking portion is disposed between the storage case locked between the storage case and the main body and the heating element.

  It is possible to provide a self-ballasted lighting device with good assembly ability.

FIG. 1 is an external front view of a light bulb shaped lighting device according to an embodiment of the present invention. It is a disassembled perspective view of the lightbulb-shaped illuminating device shown by FIG. It is a longitudinal cross-sectional view of the lightbulb-shaped illuminating device in alignment with the AA of FIG. It is the top view which showed the latching relation of an inner holder and a cover member. It is an enlarged view of FIG. It is a cross-sectional exploded view of FIG.

  Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In each of the drawings, the same reference numerals are given to the common parts, and the duplicated explanation is omitted. As shown to each figure, the cover member 10 side in the lightbulb-shaped illuminating device 100 is an upper side, and the nozzle | cap | die 80 side is made into the up-down direction down.

  FIG. 1 is an external front view of a light bulb shaped lighting device according to an embodiment of the present invention.

  As shown in FIG. 1, it can be confirmed from the appearance that the light bulb shaped lighting device 100 includes the cover member 10, the main body 70, the base 80 and the insulating ring 90.

  FIG. 2 is an exploded perspective view of the light bulb shaped lighting device shown in FIG. FIG. 3 is a longitudinal cross-sectional view of the light bulb shaped lighting device taken along the line AA of FIG. FIG. 4 is a plan view showing a locking relationship between the inner holder and the cover member. FIG. 5 is an enlarged view of FIG. 6 is a cross-sectional exploded view of FIG.

  As shown in FIG. 2 and the like, the bulb-shaped lighting device 100 includes a cover member 10, a light emitter 30, a power circuit board 50, a storage case 60, an inner holder 20, a main body 70, and an insulating ring 90. A base 80 is provided.

[Body]
As shown in FIGS. 1, 2 and 6, etc., the main body 70 is configured to extend radially outward from the outer peripheral surface of the hollow and substantially cylindrical trunk 71 and the outer peripheral surface of the trunk 71 centering on the axis of the trunk 71 (barrel And a plurality of fins 72 integrally formed with the body portion 71 so as to protrude radially outward from the outer peripheral surface of the portion 71. The fins 72 extend in the same direction as the axial direction (vertical direction) of the body 71. By providing the fins 72, the heat radiation performance of the main body 70 can be improved.

  The fins 72 may have a plurality of extending portions extending upward by a predetermined length than the upper end (the end on the cover member 10 side) of the trunk portion 71 (not shown). That is, the upper portion of the main body 70 may have a concavo-convex shape due to the extending portion of the fin 72 and the upper end of the trunk portion 71. In this case, it is desirable that a plurality of groove portions corresponding to the extension portions of the fins 72 be formed in the skirt of the cover member 10. When the cover member 10 is attached to the inner holder 20 described later, the extending portions of the respective fins 72 are fitted in the groove portions of the cover member 10, so that the rotation of the cover member 10 can be prevented. Play.

  As shown in FIGS. 2 and 3 etc., the inner side surface of the body 71 is shaped so that the storage case 60 can be fitted outside.

  Further, the main body 70 includes a light emitter placement portion 77 to which the light emitter 30 is attached, and a holder placement portion 78 to which the inner holder 20 is attached. The light emitter placement portion 77 is a portion projecting upward from the holder placement portion 78. A screw hole 74 for fixing the light emitting body 30 to the main body 70 with the screw S is provided on the top surface of the light emitting body mounting portion 77. In the present embodiment, the light emitter mounting portions 77 are four in number, and between the light emitter mounting portions 77 is a groove 79 which is a part of the holder mounting portion 78.

  The light emitter placement portion 77 is formed thick in the vertical direction. When the light emitting body 30 is attached to the main body 70, the contact area of the light emitting body 30 and the light emitting body mounting portion 77 becomes larger than the contact area of the case where the light emitting body mounting portion 77 is not provided. By the increase in the contact area, the heat conductivity from the light emitter 30 which is a heat source to the main body 70 becomes high. Thereby, the heat dissipation of the light bulb shaped lighting device 100 can be enhanced, and the reliability for long-term use in terms of heat can be improved.

  Further, the area of the light emitter 30 is larger than the area of the cylindrical portion of the storage case 60. Therefore, by fixing the light emitter 30 to the main body 70, there is an effect that the storage case 60 will not come off from above the main body 70.

  The main body 70 is made of, for example, a material having a high thermal conductivity, such as aluminum (including an alloy). Therefore, the heat generated by the light emitting body 30 is efficiently conducted to the main body 70 and released from the outer peripheral surface of the main body 70 to the external air. Also, by forming the main body 70 with a resin material such as PC (polycarbonate) or PBT (polybutylene terephthalate), although the heat dissipation is inferior to aluminum etc., the electrical insulation can be enhanced, and safety can be improved. It can be enhanced.

[Luminous body]
As shown in FIGS. 2, 3, 4, and 6, the light emitter 30 includes a substrate 32 and LEDs (semiconductor elements) 31 mounted on the substrate 32.

  As a semiconductor element used for LED31, what emits blue light is used, for example. Each LED 31 is covered with a transparent sealing resin such as silicone resin, for example. In the sealing resin, a phosphor for color conversion of light emitted from the semiconductor element of the LED 31 is mixed. As a fluorescent substance, the thing of yellow light emission is used, for example, and the blue light from the semiconductor element of LED31 is color-converted by the said fluorescent substance, and it becomes white light. The LED 31 may be covered with a hemispherical lens in order to improve the light extraction efficiency.

  The substrate 32 has a substantially circular plate shape, and a notch 33 is provided on the outer peripheral side. The notch 33 may be a through hole or the like as long as the substrate 32 is attached to the main body 70 with the screw S. Further, on the surface (upper surface) of the substrate 32, a predetermined pattern to be connected to the LED 31 is formed.

[Cover member]
As shown in FIGS. 2, 3, 4, and 6, the cover member 10 is a member made of resin such as PC (polycarbonate) or glass, and is a member opened toward the light emitting body 30. The cover member 10 may contain a light diffusing material for diffusing the light from the light emitter 30. In the vicinity of the open end 11 of the cover member 10, a hole 13 corresponding to a locking claw 24 of an inner holder 20 described later is formed. The open end 11 of the cover member 10 is a portion of the first end (lower end) of the cover member 10. The cover member 10 covers the light emitter 30 in the assembled state as the light bulb shaped lighting device 100.

[Power circuit board]
As shown in FIGS. 2, 3, 6 and the like, the power supply circuit board 50 is a board on which a plurality of electronic components are mounted, and is for emitting the light emitting body 30. In the state where the power supply circuit board 50 is stored in the storage case 60, the capacitor 51 is provided on the lower side of the power supply circuit board 50. The power supply circuit board 50 includes a circuit for rectifying AC power from a commercial power source to DC power, a circuit for adjusting the voltage of DC power after rectification, and the like (not shown).

[Storage case]
As shown in FIGS. 2 and 6, the storage case 60 is made of, for example, a resin such as PBT (polybutylene terephthalate) or PC (polycarbonate). The storage case 60 is a substantially cylindrical member including a cylindrical portion 62 communicating from one end surface (upper surface) to the other end surface (lower surface) and an arm portion 63 projecting outward on the upper side of the cylindrical portion 62. In the present embodiment, four arms 62 are provided. In the present embodiment, the power supply circuit board 50 is stored from one end surface side (upper side) of the storage case 60. The storage case 60 may have any shape that can store the power supply circuit board 50 and to which the base 80 can be attached. On the other end surface side (lower side) of the storage case 60, a screw groove 61 corresponding to the inner peripheral surface of the mouth ring 80 is formed.

[Cap]
The base 80 is attached to the lower side of the storage case 60. The base 80 is for electrically connecting to a commercial power source by screwing the bulb-shaped lighting device 100 into a socket (not shown) for a general lighting bulb.

[Inner holder]
Next, the inner holder 20 will be described in detail.

  As shown in FIGS. 2 to 6, in the present embodiment, the inner holder 20 has a frame portion 21 having a substantially circular outer shape, and a plurality of engagement members projecting outward from the inner side in the radial direction of the frame portion 21. It is a member of a substantially annular structure having a stop claw 24 and a plurality of plate portions 22 protruding inward from the radially outer side of the frame portion 21. The inner holder 20 is disposed between the main body 70 and the storage case 60, and attached to the main body 70 when the storage case 60 is attached to the main body 70. With the inner holder 20 attached to the main body 70, the frame portion 21 is positioned on the holder mounting portion 78, and the plate portion 22 is positioned on the groove 79. By positioning the plate portion 22 on the groove portion 79, it is possible to prevent the rotation of the inner holder 20 and to improve the positional accuracy in the rotation direction.

  In the present embodiment, four locking claws (locking portions) 24 are disposed on the upper part of the annular structure of the inner holder 20. The locking portion of the inner holder 20 can be engaged with the hole (locked portion) 13 disposed in the cover member 10 to lock the cover member 10. Furthermore, by providing the uneven portion corresponding to the extending portion of the fins 72 in the frame portion 21 of the inner holder 20, there is an effect of preventing the rotation of the inner holder 20 and raising the positional accuracy in the rotation direction.

  In the present embodiment, when the inner holder 20 is attached to the main body 70, the inner holder 20 only needs to be restrained by the storage case 60, so the thickness and the shape are not limited. The inner holder 20 is usually disposed below the light emitter 30.

  The inner holder 20 is made of PC (polycarbonate), PBT (polybutylene terephthalate), COP (cycloolefin polymer), cycloolefin copolymer (COC), acrylic resin, silicone resin, epoxy resin, etc., and has heat resistance and electrical insulation. It is formed from the resin material which it has. The inner holder 20 may be made of a translucent material such as glass.

  In the light bulb shaped lighting device 100, the inner holder 20 is attached so as to be located inside the cover member 10. Here, since the locking claws 24 protrude outward in the radial direction in the inner holder 20, after the holes 13 and the locking claws 24 are locked, the locking claws 24 are directed inward from the outside of the cover member 10. Even if a force is applied, it is difficult to release the locking between the hole 13 and the locking claw 24 and the effect of high reliability can be obtained. Further, the outermost side of the locking claw 24 is positioned inside the outermost side of the frame portion 21.

  As described above, the inner holder 20 for locking the cover member 10 is disposed separately between the main body 70 and the storage case 60 and is separate from the storage case 60 to which the base 80 is attached. The locking (fitting) with the cover member 10 can be performed regardless of the accuracy of 80. Further, by providing the uneven portion corresponding to the fin extension portion of the main body 70 in the frame portion 21 of the inner holder 20, there is an effect of preventing the rotation of the inner holder 20 and raising the positional accuracy in the rotation direction.

  Since the inner holder 20 and the storage case fixed to the base 80 and the storage case 60 are separate parts, the position accuracy is not affected by the dimensions of the base 80 and the like. Further, the inner holder 20 is held down by the storage case 60, and there is no concern that parts will float.

  Thereby, by raising the height position accuracy of only the inner holder 20, the attachment of the cover member 10 becomes easy, and it is possible to provide a light bulb shaped lighting device with good assemblability.

  An outline of a method of assembling the bulb-shaped lighting device 100 will be described with reference to FIGS.

  First, the inner holder 20 is fitted into the main body 70 from the information. Since the plate portion 22 of the inner holder 20 is positioned in the groove 79 of the main body 70, the inner holder 20 does not rotate with respect to the main body 70. In the case where the main body 70 is provided with the fin extending portion and the concavo-convex portion is provided in the inner holder, it does not rotate further.

  Next, the storage case 60 is fitted into the main body 70 from above. In a state where the storage case 60 is fitted into the main body 70, the screw groove 61 of the storage case 60 will pop out from the lower opening of the main body 70. In this state, the arm 63 is positioned in the groove 79, and the plate 22 of the inner holder 20 is sandwiched between the arm 63 and the groove 79. Subsequently, the power supply circuit board 50 is inserted and stored in the storage case 60 from above (one end side) with the longitudinal direction (axial direction) vertical. At this time, the tip of the output lead wire (not shown) previously connected to the power supply circuit board 50 is pulled out from the inside of the storage case 60.

  On the other hand, lead wires (not shown) for input previously connected to the power supply circuit board 50 are connected to predetermined positions of the base 80. Furthermore, the screw groove 61 of the storage case 60 and the base 80 are screwed together. Thereby, the storage case 60 is locked to the main body 70. As the storage case 60 is locked to the main body 70, the inner holder 20 located between the storage case 60 and the main body 70 is also locked to the main body 70.

  In addition, since the storage case 60 is an insulating resin, when the screw groove 61 of the storage case 60 protrudes from the main body 70 and the screw groove 61 and the base 80 are screwed together, the die and the main body 70 are If a distance of 3 mm or more is provided between them, there is no possibility that the base 80 and the main body 70 come in contact with each other, and an insulating ring or the like is not required. As a result, it is possible to reduce the number of parts. At this time, the heat transmitted from the main body 70 is less likely to be transmitted to the cap 80 side, so that the temperature rise of the capacitor 51 accommodated in the vicinity of the cap 80 can be suppressed.

  A resin (not shown) having a good thermal conductivity and a high electrical insulation property may be filled around the power supply circuit board 50 stored in the storage case 60. The heat generated in the power supply circuit board 50 can be efficiently conducted to the main body 70 by this resin.

  Subsequently, the light emitting body 30 is attached to the light emitting body mounting portion 77 of the main body 70.

  Then, the light emitting body 30 is assembled to the main body 70 by causing the screw member S to penetrate through the notch 33 of the light emitting body 30 and screwing it into the screw hole 74 formed in the light emitting body mounting portion 77 of the main body 70. In this state, the substrate 32 of the light emitting body 30 covers a part of the upper surface of the storage case 60, thereby preventing the storage case 60 from being pulled upward. Since the storage case 60 does not come off in the upward direction, the plate portion 22 of the inner holder 20 located below the arm 63 of the storage case 60 also does not come off in the upward direction.

  Subsequently, the lead wire (not shown) drawn out from the inside of the storage case 60 is wound around, and the tip of the lead wire is connected to the LED 31 of the light emitting body 30 by a connector, soldering or the like.

  Finally, the cover member 10 is attached to the inner holder 20 from above the main body 70 so as to cover the light emitter 30. That is, the cover is formed so that the locking claw 24 corresponding to the locking portion formed on the inner holder 20 locks in the hole 13 corresponding to the locked portion formed on the lower side of the cover member 10. Attach the member 10.

  In addition, the assembly method of the lightbulb-shaped illuminating device 100 is not limited to the above-mentioned method, It is possible to change suitably.

  The heat generated when the LED 31 emits light transfers heat in the order of the substrate 32 and the main body 70 and is released to the outside.

  As mentioned above, although the embodiment was demonstrated about the lightbulb-shaped illuminating device which concerns on this invention, the embodiment of this invention is not limited to these description, A various change etc. can be performed.

  In addition, the light from the light emitter 30 is not limited to white, and can be set to a desired color using LEDs or phosphors of different emission colors.

  Moreover, although embodiment demonstrated the case where the light-emitting body 30 was equipped with seven LED31, the number of LED is not limited to this, One may be sufficient.

  In the embodiment, the LED 31 may be covered by a lens.

  Further, although the case where the light emitter 30 includes the LED has been described in the above embodiment, another semiconductor light emitting element such as EL (Electro-Luminescence) may be used as the light emitter 30.

  In addition, although the locking of the inner holder 20 and the cover member 10 is performed by the locking claw 24 of the inner holder 20 and the hole portion 13 of the cover member 10, if it is a structure that can lock both of them, It is not limited to this. For example, a hole may be provided in the inner holder, a locking portion may be provided in the cover member 10, or a recess may be provided instead of the hole. In this case, the direction of the locking claw or the like may be suitably changed so that the assembling is good and the locking is difficult to be released.

  In addition, when the insulating case is housed in the main body, the locking portion of the insulating case is disposed at a position separated from the upper end of the main body because the positional dimension accuracy of the locking portion is not received. Even if an adhesive is used as an auxiliary, the adhesive nozzle interferes with other parts, and the application nozzle of the adhesive does not reach the locking portion, resulting in a manufacturing problem that the locking portion can not be coated. Although there is a fear, using the inner holder 20 as in the light bulb shaped lighting device according to the present invention makes it possible to obtain the positional dimension accuracy of the locking portion and the nozzle does not reach even when using the adhesive auxiliaryly. This fear can be reduced.

DESCRIPTION OF SYMBOLS 10 Cover member 20 Inner holder 24 Locking claw 30 Light emitter 31 LED (semiconductor element)
50 Power Supply Circuit Board 60 Storage Case 70 Body 80 Base 100 Bulb Type Lighting System

Claims (2)

A main body, a storage case at least a part of which is stored in the main body, a light emitter provided at one end of the main body, an inner holder, a cover member, and the storage case at the other end of the main body And a base,
The inner holder can lock the cover member,
The inner holder includes a plate portion positioned in a groove portion of the main body, and a bulb-shaped illumination engaged between the storage case and the main body in a state where the base is attached to the storage case via the main body apparatus. The inner holder has a locking claw that protrudes radially outward and can lock the cover member,
The light bulb shaped lighting device according to claim 1 , wherein the inner holder is positioned inside the cover member in a state where the cover member is locked to the inner holder.

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