JP3164202U - LED bulb - Google Patents

Abstract

Provided is an LED bulb that can be brought close to the light distribution of an incandescent bulb or a halogen bulb. An LED light bulb including an LED light source unit in a holder having a base at a rear end and a cover member for covering an opening formed at the front end of the holder. The cover member 4 includes a side wall portion 19 extending forward from the front end of the holder 2, and the side wall portion 19 is configured to be able to transmit the irradiation light from the LED light source 1 to the outside. [Selection] Figure 4

Description

  The present invention relates to an LED bulb configured using an LED (light emitting diode) in a light source section.

  In recent years, instead of filament light bulbs, LED light bulbs that use LEDs (light-emitting diodes) having a long life and low power consumption as a light source have been increasingly adopted. As this LED bulb, for example, a base is provided at the rear end, the LED light source part is accommodated in a metal holder, and the opening formed at the front end of the holder in which the LED light source part is accommodated is formed in a disc-like transparent shape. The one covered with a simple cover member has already been proposed (see, for example, Patent Document 1).

JP 2009-93926 A

  In general, this type of LED bulb is used by being mounted on a socket in which an incandescent bulb, a halogen bulb or the like used for a hanging type lighting fixture or downlight is mounted. For this reason, it is necessary to make the light distribution of an LED bulb close to the light distribution of an incandescent bulb or a halogen bulb. However, in Patent Document 1, since the LED light source part is completely covered with a metal holder, the irradiation light spreading laterally from the LED light source is blocked by the side wall of the holder. For this reason, the irradiation light from the LED light source is irradiated only to the front side through the cover member, and there is a disadvantage that it cannot be brought close to the light distribution of the incandescent bulb or the halogen bulb.

  Then, this invention is made | formed in view of this situation, and makes it a subject to provide the LED light bulb which can be approximated to the light distribution of an incandescent light bulb or a halogen light bulb.

  An LED bulb according to the present invention is an LED bulb that houses an LED light source part in a holder having a base at the rear end and includes a cover member for covering an opening formed at the front end of the holder, The cover member includes a side wall portion extending forward from a front end of the holder, and the side wall portion is configured to be able to transmit the irradiation light from the LED light source to the outside.

  According to the present invention, the irradiation light from the LED light source passes through the side wall portion of the cover member and is irradiated to the outside. The light emitted to the outside includes the light radiated to the side of the LED bulb and the light radiated to the rear side of the LED bulb, and the light distribution of the LED bulb can be brought close to that of an incandescent bulb or a halogen bulb. it can.

  Moreover, as for the LED light bulb which concerns on this invention, the said side wall part may be comprised from the material which has translucency.

  According to such a configuration, the irradiation light from the LED light source passes through the side wall portion made of a light-transmitting material and is irradiated to the outside over the entire circumferential direction of the side wall portion. Compared with the case of forming a through-hole or slit through which light is transmitted, light can be uniformly irradiated in the circumferential direction.

  Further, in the LED bulb according to the present invention, the cover member has a lens cover unit in which a lens for changing the irradiation angle of the irradiation light from the LED light source unit is integrated, and the lens cover unit to the holder side. The structure provided with the fixed cover part for pressing and fixing may be sufficient.

  According to such a configuration, since the lens cover part and the fixed cover part are separately provided, the irradiation light from the LED light source part can be obtained by replacing the lens cover part with, for example, another lens cover part having a different diffusion angle. There is an advantage that the irradiation angle can be easily changed.

  Further, in the LED bulb according to the present invention, the fixed cover portion includes the side wall portion and an annular portion extending from the front end of the side wall portion toward the radial center portion, and an inner edge of the annular portion is the You may comprise the press part for pressing a lens cover part to the said holder side.

  According to such a configuration, the pressing portion of the fixed cover portion can be fixed by pressing the lens cover portion toward the holder side only by attaching the fixed cover portion, and the lens cover portion and the fixed cover portion are fixed separately. Compared to the case, the fixing work can be performed quickly.

  As described above, according to the LED bulb according to the present invention, the side wall portion is configured so that the irradiation light from the LED light source can be transmitted to the outside, whereby the irradiation light from the LED light source is transmitted to the side wall of the cover member. In addition to the side of the LED bulb through the unit, the LED bulb can be irradiated to the rear side of the LED bulb, and the LED bulb can provide the light distribution of the LED bulb close to that of the incandescent bulb or the halogen bulb. .

The perspective view of the LED bulb of the present invention is shown. The front view of the LED bulb is shown. It is a figure which shows the principal part of the LED bulb, (a) is a top view of the fixed cover part which comprises an LED bulb, (b) is a bottom view of the fixed cover part, (c) accommodated LED. The top view of a holder is shown. It is a figure of the upper end part of the LED bulb, (a) is a longitudinal side view showing a state immediately before assembly, (b) shows a longitudinal side view after assembly.

  Hereinafter, an LED bulb according to the present invention will be described with reference to FIGS. This LED light bulb is configured to be used as a light bulb simply by screwing (attaching) it into a socket of an incandescent light bulb or a halogen light bulb. Moreover, the LED light bulb which concerns on this invention can implement | achieve the structure which can perform 20%-100% light control by being attached to an illuminating device provided with a light control unit. 1, 2, and 4 (a) and 4 (b), the side on which light is irradiated, that is, the upper side of the paper surface is the upper side of the LED bulb, and the lower side of the paper surface is the lower side of the LED bulb.

  As shown in FIGS. 1 and 2, the LED bulb includes a holder 2 that houses the LED light source unit 1 (see FIGS. 3C, 4 </ b> A, and 4 </ b> B), and an upper side of the LED light source unit 1. And a cover member 4 that closes an opening 3 (see FIG. 4A) formed at the upper end (front end) of the holder 2 that is the front side. In addition, a base 5 to which electric power is supplied is provided at the lower end (rear end) of the holder 2 which is the lower side (rear side) of the LED light source unit 1. By screwing the base 5 into a socket (not shown), the LED bulb is fixed and power is supplied through the socket so that light can be emitted from the LED bulb. In addition, the direction of parenthesis describes the direction seen from the LED light source part 1, The front of the LED light source part 1 is made into the front side, and the back of the LED light source part 1 is made into the back side.

  As shown in FIG. 3C, the LED light source unit 1 includes four light emitting diodes (LEDs) 6 and a substrate 7 to which these light emitting diodes 6 are attached. The four light emitting diodes 6 are arranged on the substrate 7 at equal intervals in the vertical and horizontal directions.

  The light-emitting diode 6 is a chip-type light-emitting diode, and the color of the light-emitting diode 6 may be any color such as white, red, blue, or green. It is preferable to color the cover member 4 in accordance with the color of the light emitting diodes 6.

  The substrate 7 is formed in a substantially circular plate shape having a cutout portion 7A that is cut off at one end, and power supply lines 9 and 10 for the light emitting diode 6 are formed through a gap 8 between the cutout portion 7A and the inner surface of the holder 2. It is used as an installation space. Further, circular concave portions 13 for positioning which are engaged with leg portions 12 of a lens cover portion 11 to be described later are formed at four locations on the surface of the substrate 7. In addition, the front surface (upper surface) of the substrate 7 is coated with a white synthetic resin (for example, polybutylene terephthalate) having light resistance, heat resistance, and electrical insulation so that the substrate 7 reflects light from the light emitting diode 6. It functions as a reflector.

  The holder 2 is made of aluminum die-cast (various metals or heat-resistant synthetic resin materials may be used). The purpose is to improve heat dissipation and design with a predetermined interval in the longitudinal direction (up and down direction of the paper). A plurality of grooves 14M are formed on the outer surface, and a holder main body portion 14 having a circular cross section that is narrowed so that the diameter becomes smaller toward the lower end side (rear end side) is connected to the holder main body portion 14 And a small-diameter portion 15 having a base 5 at the lower end (rear end).

  The small-diameter portion 15 includes a narrowed portion 15A that is narrowed so that the diameter becomes smaller toward the lower end side (rear end side), and a cylindrical portion 15B that extends from the narrowed portion 15A to the lower end side (rear end side), And a second narrowing portion 15C that is narrowed so that the diameter decreases from the cylindrical portion 15B toward the lower end side (rear end side).

  The cover member 4 is made of a light-transmitting material, and specifically, as shown in FIGS. 1 and 4A and 4B. A lens cover portion 11 made of a transparent synthetic resin (may be made of glass) in which four light diffusion lenses 16 for changing the irradiation angle of the light emitted from the LED light source portion 1 are integrated; And a fixing cover portion 17 made of synthetic resin (or glass) that is translucent (may be transparent) for pressing and fixing the cover portion 11 to the holder 2 side.

  The lens cover portion 11 includes a circular plate-like disc portion 18 for substantially covering the opening 3 of the holder 2, and four lenses that taper toward the LED light source portion 1 on the lower surface (rear surface) of the disc portion 18. 16 and four columnar legs 12 that are positioned near the outer periphery of the lens 16 and extend toward the LED light source unit 1. The lower end (rear end) of the four leg portions 12 extends to the LED side from the lower end (rear end) of the lens 16 and is thinner than the leg portion 12 extending from the lower end (rear end) to the LED side. 12A is provided. The cylindrical portion 12A can be used not only as a positioning member that is inserted into the concave portion 13 to position the lens cover portion 11, but also in order to adjust the focal length, the distance from the light incident surface of the lens 16 to the light emitting diode 6 is set. It can be used as a locking portion for setting a predetermined distance. 4A and 4B, the diameter of the concave portion 13 is set larger than the diameter of the cylindrical portion 12A for easy understanding, but in reality, the concave portion is smaller than the diameter of the cylindrical portion 12A. The diameter of 13 is set slightly larger.

  As shown in FIGS. 3A and 3B and FIGS. 4A and 4B, the fixed cover portion 17 is an annular side wall portion extending from the upper end (front end) of the holder 2 to the upper side (front side). 19 and a donut-shaped annular portion 20 having a plate-like hole extending through the central portion extending from the upper end (front end) of the side wall portion 19 to the radial center portion side. The edge 20B constitutes a pressing portion for pressing the lens cover portion 11 toward the holder side.

  The side wall portion 19 is configured to extend over the entire circumferential direction, and is accumulated at the lower end (rear end) on the LED light source portion 1 side with four air holes (inside the holder 2) at equal intervals in the circumferential direction. A hole 19A (see FIG. 1 and FIG. 3B) for cutting out heat to the outside is cut out. Further, a protrusion 19T for locking the notch 2A (see FIG. 3C) formed in the holder 2 and positioning the fixed cover portion 17 with respect to the holder 2 at a predetermined position on the inner surface of the side wall portion 19. (See FIG. 3B). Further, the side wall portion 19 is positioned by fitting from the outside into a step portion 2B formed on the outer surface of the upper end (front end) of the holder 2 over the entire circumference.

  The annular portion 20 has an annular outer portion 20A whose lower surface (rear surface) contacts the upper end surface of the holder 2, and a lower surface (rear surface) located above the lower surface (rear surface) of the outer portion 20A, as described above. And an inner edge 20B that presses the lens cover portion 11 toward the holder. The front end surface (upper end surface) of the outer portion 20A is formed with a substantially rectangular recess 20C that is recessed from the surface at a predetermined interval in the circumferential direction. By forming the recess 20C, not only can the design be improved, but also the light emission direction can be changed in various directions to enhance the diffusibility.

  In addition, through holes 22 are formed for allowing the screws 21 to pass through four locations at predetermined intervals in the circumferential direction of the outer portion 20A. Therefore, in a state where the fixed cover portion 17 is fitted to the upper end of the holder 2, the protruding portion is made to protrude at four locations in the circumferential direction from the upper end portion (front end portion) of the holder 2 after passing the screw 21 through the through hole 22. The fixing cover portion 17 can be fixed to the holder 2 by screwing a screw 21 into a screw hole 2N formed in the central portion of 2T.

  As shown in FIG. 4A, the through hole 22 has a diameter larger than the small diameter portion 22A so that a small diameter portion 22A into which the shaft portion 21A of the screw 21 can be inserted and a part of the head portion 21B of the screw 21 can enter. And a large-diameter portion 22B set in the above.

  Next, the assembly order of the LED bulb will be described. First, as shown in FIG. 4A, the locking portions 12A of the four leg portions 12 are locked to the four recesses 13 (see FIG. 3C) of the substrate 7 accommodated in the holder 2. Then, the lens cover portion 11 is positioned and fixed on the substrate 7. At this time, the disk portion 18 of the lens cover portion 11 is in a state of protruding upward (forward) from the upper end (front end) of the holder 2.

  Subsequently, the side wall portion 19 of the fixed cover portion 17 is externally fitted to the step portion 2 </ b> B at the upper end (front end) of the holder 2. At this time, the disk portion 18 of the lens cover portion 11 is fitted into a step portion (see FIG. 4A) formed by the inner surface 20a of the outer portion 20A and the lower surface 20b of the inner edge 20B, and is fixed so as not to move. Is done. In addition, the four leg portions 12 maintain the light incident surface of the lens 16 of the lens cover portion 11 and the upper end (front end) of the light emitting diode 6 at a set distance.

  Thereafter, the four screws 21 are sequentially inserted into the four through-holes 22 and then screwed into the screw holes 2N of the projecting portions 2T of the holder 2, thereby fixing the fixed cover portion 17 to the holder 2 and assembling the LED bulb. Can be completed.

  As shown in FIGS. 2 and 4 (b), the LED bulb assembled in this way emits light emitted from the light emitting diode 6 to the front side through the lens cover part 11, and part of the light. Is transmitted to the fixed cover portion 17 through the disk portion 18 and emitted to the lateral side and the rear side through the side wall portion 19 so that light can be irradiated in various directions. Since light can be irradiated in various directions in this way, it can be brought close to the light distribution of an incandescent bulb or a halogen bulb, and an LED bulb that can illuminate the entire room can be obtained.

  Moreover, by constituting the lens cover part 11 and the fixed cover part 17 from different members, the lens cover part 11 is replaced with another lens cover part having a different diffusion angle, so that the irradiation light from the LED light source part 1 can be changed. The irradiation angle can be easily changed. Further, since the pressing portion 20B of the fixed cover portion 17 can press and fix the lens cover portion 11 to the holder side only by attaching the fixed cover portion 17, the lens cover portion 11 and the fixed cover portion 17 are separately provided. Fixing work can be performed more quickly than the case of fixing to.

  The LED bulb according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

  For example, as a light emitting diode, a bullet type including a lens may be used in addition to a chip type. When a bullet-type light emitting diode is used, the lens cover portion 11 can be omitted. In addition, the number of light emitting diodes can be changed as needed. Further, as the lens 16 constituting the lens cover unit 11, a lens for diffusing light may be used, or a condensing lens for condensing light may be used. In addition, a bowl-shaped cylindrical lens or the like may be used as the lens, or a composite lens in which a plurality of lenses are combined may be used.

  In the embodiment, the cover member 4 is composed of two members, the lens cover portion 11 and the fixed cover portion 17. However, the cover member 4 may be composed of one member, or may be composed of three or more members. You can also

  Moreover, in the said embodiment, although it was set as the structure which fixes the cover member 4 to the holder 2 using the screw | thread 21, the holder 2 is provided with the to-be-latched part which consists of holes etc., and it latches to this to-be-latched part. The cover member 4 may be detachably fixed to the holder 2 by a locking mechanism in which the cover member 4 is provided with a locking portion. In some cases, the cover member 4 cannot be attached to or detached from the holder 2 with an adhesive or the like. It may be fixed.

  Moreover, in the said embodiment, although the side wall part 19 was comprised from the material which has translucency, light was able to be uniformly irradiated over the circumferential direction whole region of the side wall part 19, However, for example, light It is also possible to implement by providing a large number of through-holes and slits that can transmit light at a predetermined interval in the circumferential direction of the side wall portion.

  DESCRIPTION OF SYMBOLS 1 ... LED light source part, 2 ... Holder, 2A ... Notch, 2B ... Step part, 2N ... Screw hole, 3 ... Opening, 4 ... Cover member, 5 ... Base, 6 ... Light emitting diode, 7 ... Substrate, 7A ... Notch 8, a clearance, 8 K, a through hole, 9, 10 a power supply line, 11 a lens cover, 12 a leg, 12 A a cylindrical portion, a locking portion, 13 a recess, 14 a holder main body , 14M ... groove, 15 ... small diameter part, 15A ... narrowing part, 15B ... cylindrical part, 15C ... second narrowing part, 16 ... lens, 17 ... fixed cover part, 18 ... disk part, 19 ... side wall part, 19A ... Vent, 19T ... Protrusion, 20 ... Annular part, 20A ... Outer part, 20B ... Inner edge (pressing part), 20a ... Inner side, 20b ... Lower face, 21 ... Screw, 21A ... Shaft part, 21B ... Head 22 through hole 22A small diameter portion 22B large diameter portion

Claims (4)

An LED bulb comprising a cover member for housing an LED light source in a holder having a base at the rear end and covering an opening formed at the front end of the holder,
The LED light bulb, wherein the cover member includes a side wall portion extending forward from a front end of the holder, and the side wall portion is configured to be able to transmit the irradiation light from the LED light source to the outside.   The LED bulb according to claim 1, wherein the side wall portion is made of a light-transmitting material.   A lens cover unit integrated with a lens for changing the irradiation angle of the irradiation light from the LED light source unit; and a fixing cover unit for pressing the lens cover unit toward the holder and fixing the lens cover unit. The LED bulb according to claim 2, comprising:   The fixed cover portion includes the side wall portion and an annular portion that extends from the front end of the side wall portion toward the radial center, and the inner edge of the annular portion presses the lens cover portion toward the holder. The LED light bulb according to claim 3, comprising a pressing portion.

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