JP6540953B2 - Lamp device - Google Patents

Description

  Embodiments of the present invention relate to a lamp device using a light guide.

  Traditionally, there are incandescent clear bulbs that use transparent glass gloves and direct view of the filament. At the time of lighting of this incandescent clear light bulb, a strong feeling of light is obtained by the strong light coming out of the filament that is seen directly through the glass glove, so that a glittering effect can be obtained and an effect of illumination can be obtained.

  In addition, there is a lamp device that uses a light emitting element as a light source, uses a transparent globe, and can be replaced by an incandescent clear bulb. In this lamp device, light from the light emitting element is emitted into the glove by the lens, or a light emitting module provided with a plurality of light emitting elements is disposed in the inner space of the glove.

  However, with a lamp apparatus using a transparent glove, it has been difficult to reproduce the glittering feeling that the incandescent clear bulb is lit. Therefore, there is a problem in the adaptability of the lamp device to a lighting device such as a chandelier or a lighting device for a store, for which an incandescent clear light bulb is suitable for providing a glittering feeling.

U.S. Patent No. 6,803,607

  The problem to be solved by the present invention is to provide a lamp device capable of reproducing a glittering feeling as if an incandescent clear light bulb is lit, and enhancing the adaptability to a lighting device.

The lamp device of the embodiment includes a housing, a light emitting unit, a transparent globe, a light guide, and a power feeding unit. The light emitting unit is provided at one end of the housing. The glove is provided on one end side of the housing so as to cover the light emitting unit. The light guide is formed in a cylindrical shape having a diameter of 4 to 9 mm, one end is projected into the globe, the other end is opposed to the light emitting portion, a recess is provided at one end, and a prism is provided on the surface of the recess And a flat portion is provided at the center of the recess . The power feeding unit is provided on the other end side of the housing.

  According to the present invention, it is possible to reproduce a glittering feeling as if an incandescent clear bulb is lit, and it can be expected to improve the adaptability to a lighting device.

It is a sectional view of a lamp device which shows one embodiment. It is a perspective view of the disassembly state of a lamp unit same as the above. It is a perspective view of the light guide of the lamp | ramp apparatus same as the above, a cover, a light emitting module, and a disassembled state of a heat sink. It is sectional drawing of the disassembly state of a light guide and a cover same as the above. It is a perspective view of a lamp unit same as the above. It is a perspective view of the light guide of a lamp unit same as the above. It is sectional drawing of a light guide same as the above. It is an end elevation of a light guide same as the above. It is a light distribution figure of a lamp unit same as the above. It is a graph which shows the relationship between the apex angle of the prism of a light guide same as the above, and the ratio of the luminous intensity of light distribution angle 120 degrees to the luminous intensity of light distribution angle 0 degree. It is a graph which shows the relationship between the angle of the recessed part of a light guide same as the above, and the ratio of the luminous intensity of light distribution angle 120 degrees with respect to the luminous intensity of light distribution angle 0 degree. It is a graph which shows the relationship between the value of the depth / diameter of the recessed part of a light guide same as the above, and the ratio of the luminous intensity of light distribution angle 120 degrees with respect to the luminous intensity of light distribution angle 0 degree.

  Hereinafter, one embodiment will be described with reference to FIGS. 1 to 12.

  The lamp device 10 is shown in FIGS. 1, 2 and 5. The lamp device 10 is a bulb-shaped lamp that can be used by being attached to a socket for general lighting incandescent bulbs, and is a candle-shaped lamp.

  The lamp device 10 includes a housing 11. The heat sink 12, the light emitting module 13, the light guide 14, the cover 15, and the globe 16 are disposed on one end side of the casing 11, and the case 17 and the power supply unit 18 are disposed inside the casing 11. Also, at the other end side of the housing 11, the power feeding unit 19 is disposed. The lamp device 10 has a virtual central axis (lamp axis) extending from the globe 16 to the feeding part 19. The globe 16 side of the central axis is referred to as one end side, and the feeding part 19 side is referred to as the other end.

  The housing 11 is formed of a metal material. For example, the housing 11 is made of aluminum die casting. The housing 11 is formed in a cylindrical shape in which the diameter on one end side is larger than the diameter on the other end side, and the diameter decreases from one end side to the other end side. Inside the housing 11, a hollow portion opened at one end and the other end is formed. A mounting surface 22 on which the peripheral portion of the heat dissipation plate 12 is mounted is formed on one end face of the housing 11. The cover 15, the light emitting module 13 and the heat dissipation plate 12 are integrally fastened together on the mounting surface 22 A plurality of screw holes 24 into which the plurality of screws 23 are screwed are formed. In the present embodiment, the screw holes 24 are provided at three places in the circumferential direction of the housing 11, but only two screws 23 are used. An annular projecting portion 25 projects from the periphery of the mounting surface 22, and an annular mounting edge 26 projects from an inner periphery of the tip of the projecting portion 25.

  Further, as shown in FIGS. 1 to 3, the heat sink 12 is formed in a substantially disc shape, for example, by a metal material such as aluminum. The light emitting module 13 is brought into contact with one end face of the heat sink 12 in a heat conductive manner, and the peripheral part of the other end face of the heat sink 12 is placed on the mounting surface 22 of the housing 11 and brought into contact with the heat conduction. In the periphery of the heat sink 12, an insertion groove 29 through which the screw 23 is inserted is formed, and a wiring groove 30 for passing a wire for electrically connecting the light emitting module 13 and the power supply unit 18 is formed. There is.

  In the present embodiment, a COB (Chip On Board) module is used as the light emitting module 13. The light emitting module 13 is filled so as to seal the light emitting element 34 in the substrate 33, the plurality of light emitting elements 34 mounted on the substrate 33, the frame portion 35 surrounding the light emitting elements 34 and the frame portion 35. The phosphor layer 36 is provided. The surface of the phosphor layer 36 is configured as a light emitting unit 37.

  The substrate 33 has a flat plate shape, and a wiring pattern for electrically connecting the plurality of light emitting elements 34 is formed on one end surface. The substrate 33 is formed of an insulating material or a metal material. When the substrate 33 is a metal material, an insulating film is formed on the surface of the substrate 33, and a wiring pattern is formed on the insulating film. In at least three places in the peripheral portion of the substrate 33, linear notches 38 fitted with the cover 15 are formed. Further, as shown in FIG. 2, the light emitting portion 37 is disposed at the center of one end face of the substrate 33, and an electrical component such as the connector 39 is disposed at the periphery of one end face of the substrate 33. Electrical components such as the connector 39 are electrically connected to the wiring pattern.

  As the light emitting element 34, an LED is used. A blue light emitting LED is used as the LED.

  The frame portion 35 is formed in an annular shape on the substrate 33 by an insulating material.

  The phosphor layer 36 contains a phosphor that is excited by the light of the light emitting element 34 in a transparent resin. For example, it contains a yellow phosphor that is excited by the blue light of a blue light emitting LED to emit yellow light. The light emitting portion 37 which is the surface of the phosphor layer 36 emits white light.

  The light emitting unit 37 may be configured by an SMD (Surface Mount Device) package using an LED, or an organic EL other than the LED, for example.

  Further, as shown in FIGS. 1 to 4, the light guide 14 is formed in a cylindrical shape, for example, by a transparent resin or glass such as silicone resin. One end (hereinafter referred to as a tip) of the light guide 14 protrudes into the globe 16, and the other end of the light guide 14 is fixed to the cover 15 and the other end face of the light guide 14 is predetermined to the light emitting portion 37. They are facing each other with a gap. A recess 42 is formed on the end surface of the light guide 14, and a prism 43 is formed on the surface of the recess 42.

  An incident surface 44 is formed on the other end face of the light guide 14 so that the light emitted from the light emitting unit 37 enters the light guide 14. A light emitting portion 45 is formed on the tip side of the light guide 14 for emitting the light which is incident from the incident surface 44 and is guided in the light guide 14 to the outside of the light guide 14. In the light emitting portion 45, part of the light guided in the light guide 14 is reflected by the prism 43 and emitted from the peripheral surface of the light guide 14, and is guided in the light guide 14 Part of the light passes through the prism 43 and is emitted from the end face of the light guide 14. Accordingly, the light emitting portion 45 is formed on the tip end side of the light guide 14 in which the recess 42 and the prism 43 are provided, and from the light emitting portion 45, the side intersecting with the axial direction of the light guide 14 The light is emitted in a wide direction including the end direction which is one end direction of the light guide 14 and the rear direction which is directed from the light guide 14 to the side of the housing 11. The light emitted from the light emitting portion 45 of the light guide 14 reproduces a glittering feeling as if a candle-shaped incandescent clear light bulb is lit. A sense of glitter is used in the sense that "the light looks beautifully sparkling and looks like it is shining."

  Furthermore, the dimension d1 of the diameter of the light guide 14 is 4 to 9 mm. The light guide 14 has a cylindrical shape with the same diameter from one end side (tip end side) to the other end side, but the diameter at one end side (tip end side) is smaller than the diameter at the other end side It may be conical, tapering towards the side). The diameter of the light guide 14 is larger than the diameter of the light emitting portion 37.

  The tip of the light guide 14 protrudes in a central axial area in the globe 16. The axial central area within the glove 16 includes the axial center within the glove 16 and around that center.

  6 to 8 show the recess 42 and the prism 43 of the light guide 14. As shown in FIG. The recess 42 of the light guide 14 is formed so that the depth L1 from the tip of the light guide 14 at the center of the recess 42 is the deepest. The depth L1 of the recess 42 is 1.0 to 5.0 mm. The angle θ of the recess 42 with respect to the direction orthogonal to the axial direction of the light guide 14 is 28 to 47 °.

  A flat portion 46 having an area ratio of 0.1 to 1.0% is formed at the center of the recess 42 with respect to the cross section in the direction orthogonal to the axial direction of the light guide 14.

  The prism 43 has a plurality of first lines 43H radially extending outward (circumferential direction) from the central axis of the light guide 14 and extending from the bottom portion of the recess 42 toward one end (tip), and a central axis From the bottom portion toward the outer side (circumferential direction), and from the bottom portion toward the end (tip) toward the direction from the incident surface 44 to a height lower than that of the first line 43H And a plurality of second lines 43L extending in

  Specifically, the prisms 43 are formed in a triangular shape in cross section having ridges 43a and valleys 43b on both sides, and are arranged in plural along the circumferential direction of the light guide 14, and from the central axis of the light guide 14 respectively. It is provided radially.

  The apex angle α of the prism 43 is preferably in the range of 70 to 90 °. The apex angle α is an angle at a cross section in a direction perpendicular to the ridge line 43 a of the prism 43.

  The number of prisms 43, that is, the number of ridges 43a of the prism 43 is preferably 4 to 18. The angle formed between the adjacent ridge line 43a and the central axis of the light guide 14 is preferably 20 to 90 °. In the present embodiment, the number of ridges 43a of the prism 43 is 12, and the angle formed by the adjacent ridges 43a and the central axis of the light guide 14 is 30 °.

  The depth L 2 of the valley 43 b of the prism 43 on the outer peripheral surface of the light guide 14 is in a relation shallower than the depth L 1 at the center of the recess 42.

  Further, as shown in FIGS. 1 to 4, the cover 15 is formed of an insulating resin material. The cover 15 has a conical cover portion 48 whose central top projects to one end, and is attached to one end of the housing 11 so that the one end of the housing 11, the light emitting module 13, and the light guide Cover the other end side of 14 and the like.

  At the top of the center of the cover 15, a hole 49 through which the other end of the light guide 14 is inserted is formed. The hole 49 is formed in a cylindrical fixed cylinder 50 projecting from the top of the cover 15 toward the other end. The fixed cylinder 50 is formed with a plurality of slits 51 opened at the other end, and the other end side of the fixed cylinder 50 can be elastically deformed in the outer diameter direction. The inner diameter of the fixed cylinder 50, that is, the inner diameter of the hole 49 decreases from one end to the other, and the inner diameter of the other end of the hole 49 is minimized, and the inner diameter d2 is smaller than the diameter d1 of the light guide 14. Too small. Therefore, in order to insert the other end side of the light guide 14 into the hole 49 of the cover 15, the light guide 14 is press-fit so as to elastically deform the fixed cylinder 50 in the outer diameter direction. The light body 14 is press-fitted and fixed in the hole 49 of the cover 15. When press-fitting the other end side of the light guide 14 into the hole 49 of the cover 15, the light guide 14 is restricted by the stopper disposed at a fixed positional relationship with the cover 15 by the other end face of the light guide 14. The axial position of the cover 14 and the cover 15 can be positioned. The light guide 14 and the cover 15 may be bonded with an adhesive to ensure fixation.

  At the periphery of the cover 15, two insertion holes 52 through which two screws 23 are respectively inserted are formed, and the attachment edge 26 of the housing 11 is hooked at an opposite position with respect to the two insertion holes 52 The claw portion 53 is provided in a protruding manner.

  At the other end side of the cover 15, a fitting portion 54 for fitting the substrate 33 of the light emitting module 13 is formed. The fitting portion 54 is provided with a protrusion 55 in which three notches 38 provided around the substrate 33 are fitted. Insertion holes 52 are respectively formed at the positions of the two protrusions 55, and the claws 53 are provided at the positions of the remaining one protrusion 55.

  The globe 16 is formed of a transparent material having a light transmittance of 95% or more. Resin and glass are used as a transparent material. The globe 16 is hollow and formed in a conical shape tapered toward one end, and the other end is open. The glove 16 may be spherical like a so-called PS type. On the other end side of the glove 16, a fixing edge 58 which is fitted to the inside of the mounting edge portion 26 of the housing 11 and is adhesively fixed, for example, by a silicone adhesive or the like is protrudingly provided. The light emitting portion 45 at the tip of the light guide 14 is disposed in a central region in the axial direction of the globe 16.

  The case 17 is formed in a cylindrical shape by a resin material having an insulating property. The case 17 is inserted into the case 11 from one end side, and the fixing ring 61 is attached to the other end side of the case 17 projecting from the other end side of the case 11, whereby the case 17 is fixed to the case 11. The power supply unit 19 is attached to the other end of the case 17. A pair of substrate holding parts 62 are formed at two opposing locations in the case 17 along the central axis.

  Further, the power supply unit 18 converts AC power input from the power supply unit 19 into predetermined DC power and supplies the DC power to the light emitting element 34 of the light emitting module 13. The power supply unit 18 includes a circuit board 65 and a plurality of electronic components mounted on the circuit board 65. The circuit board 65 is inserted between the pair of board holding portions 62 from one end side of the case 17 and is held by the case 17. The pair of AC power input portions of the power supply unit 18 is electrically connected to the power feeding unit 19 by wiring, and the pair of DC power output units of the power supply unit 18 is electrically connected to the connector 39 of the light emitting module 13 by wiring. It is connected.

  Further, the power supply unit 19 uses a cap that can be connected to a socket for a general illumination incandescent lamp, such as E17 and E26. The feed unit 19 is not limited to the base and may be a pair of pins depending on the type of lamp.

  And the effect | action of this embodiment is demonstrated.

  When assembling the lamp device 10, the case 17 and the power supply unit 18 are incorporated in the housing 11, and the heat sink 12 and the light emitting module 13 are disposed on one end side of the housing 11. And connect with wiring.

  Thereafter, hook the claws 53 of the cover 15 to the mounting edge 26 of the housing, cover the cover 15 on the light emitting module 13, and screw the screw 23 through the insertion hole 52 of the cover 15 and the insertion groove 29 of the radiator 12. The cover 15, the substrate 33 of the light emitting module 13 and the heat dissipation plate 12 are fastened together to the casing 11 by screwing into the screw holes 24 of the two, and the substrate 33 and the heat dissipation plate 12 are thermally coupled to the casing 11 .

  By fixing the cover 15 to the housing 11, the incident surface 44 of the light guide 14 previously press-fitted and fixed to the cover 15 is positioned and arranged at a predetermined position facing the light emitting unit 37. Then, in the assembled state, there is a slight gap between the light-incident surface 44 of the light guide 14 and the light-emitting portion 37, and the light-emitting portion 37 is positioned in the region facing the light-incident surface 44 of the light guide 14. It becomes.

  Then, the lamp device 10 is used by connecting the power supply unit 19 to a socket for a general lighting incandescent lamp of a lighting device such as a chandelier, for example.

  When AC power is supplied to the lamp device 10 through the socket, the power supply unit 18 converts the AC power into predetermined DC power and supplies it to the light emitting element 34. Thereby, the light emitting element 34 emits light, and light is emitted from the light emitting unit 37.

  The light emitted from the light emitting unit 37 enters the light guide 14 from the incident surface 44 and is guided inside the light guide 14 toward the light emitting unit 45. A part of the light guided to the light emitting unit 45 is reflected by the prism 43 and emitted from the circumferential surface of the light guide 14, and a part of the light guided to the light emitting unit 45 is the prism 43 The light is transmitted and emitted from the end face of the light guide 14. Accordingly, from the light emitting portion 45 of the light guide 14, the tip direction of the light guide 14, the lateral direction intersecting the axial direction of the light guide 14, and the side direction of the casing 11 from the light guide 14 Light is emitted in a wide direction including the backward direction. The light emitted from the light emitting portion 45 of the light guide 14 passes through the globe 16 and is irradiated to the illumination space.

  The light is reflected by the prism 43 by the light incident on the surface of the prism 43 being emitted as it is from the peripheral surface of the light guide 14 or the light incident on one surface of the prism 43 being reflected by the other surface The light is emitted from the circumferential surface of the light 14.

  And the light distribution figure of the lamp apparatus 10 is shown in FIG. In this case, the diameter d1 of the light guide 14 is 6 mm, the depth L1 of the recess 42 is 2.4 mm (the angle θ of the recess 42 is 38.7 °), and the apex angle α of the prism 43 is 85 °.

  It was confirmed that the lamp device 10 having this light distribution characteristic can provide a glittering feeling when viewed from any direction within a range where the end of the light guide 14 can be seen.

  At this time, the luminous intensity at a light distribution angle of 0 ° in the tip direction of the lamp device 10 is 19 cd, and the luminous intensity at a luminous angle of 120 ° is 7 cd as a representative angle in the rear direction of the lamp device 10 The ratio of the luminous intensity at a light distribution angle of 120 ° to that of the above was 0.368.

  Therefore, it was found that if the ratio of the light intensity at a light distribution angle of 120 ° to the light intensity at a light distribution angle of 0 ° is 0.3 or more, it is possible to reproduce the glittering feeling. Therefore, it is preferable to define the recess 42 and the prism 43 of the light guide 14 with the ratio of the luminous intensity of 120 ° to the luminous intensity of 0 ° being 0.3 or more as the threshold value.

  FIG. 10 shows the relationship between the apex angle α of the prism 43 of the light guide 14 and the ratio of the luminous intensity at a light distribution angle of 120 ° to the luminous intensity at a light distribution angle of 0 °. The apex angle α of the prism 43 was in the range of 70 to 90 °, and the ratio of the light intensity at a light distribution angle 120 ° to the light intensity at a light distribution angle 0 ° was 0.3 or more. Therefore, by setting the apex angle α of the prism 43 to 70 to 90 °, it is possible to reproduce the glittering feeling from any direction within the range in which the end of the light guide 14 can be seen, from which the lamp device 10 is viewed.

  FIG. 11 shows the relationship between the angle θ of the recess 42 of the light guide 14 and the ratio of the luminous intensity at a light distribution angle of 120 ° to the luminous intensity at a light distribution angle of 0 °. The angle θ of the recess 42 was in the range of 28 to 47 °, and the ratio of the light intensity at a light distribution angle 120 ° to the light intensity at a light distribution angle 0 ° was 0.3 or more. Therefore, by setting the angle θ of the recess 42 to 28 to 47 °, it is possible to reproduce the glittering feeling from any direction in the range in which the end of the light guide 14 can be seen from which the lamp device 10 is viewed.

  FIG. 12 shows the relationship between the value of the depth L1 / diameter d1 of the recess 42 of the light guide 14 and the ratio of the luminous intensity at a light distribution angle of 120 ° to the luminous intensity at a light distribution angle of 0 °.

  There is a correlation between the diameter d1 of the light guide 14 and the ratio of the light intensity at the light distribution angle 120 ° to the light intensity at the light distribution angle 0 °, and the light distribution angle 0 ° at a diameter d1 of the light guide 14 of 4 to 9 mm. The depth L1 / diameter d1 of the recess 42 of the light guide 14 should be 0.25 to 0.55 in order for the ratio of the luminous intensity at a light distribution angle of 120 ° to the luminous intensity of 120 to satisfy 0.3 or more. desirable.

  From this relationship, the depth L1 of the recess 42 where the ratio of the luminous intensity of the light distribution angle 120 ° to the luminous intensity of the light distribution angle 0 ° is 0.3 or more is 1 when the diameter d1 of the light guide 14 is 6 mm. .5 to 3.2 mm, 1.0 to 2.2 mm when the diameter d1 of the light guide 14 is 4 mm, and 2.4 to 5.0 mm when the diameter d1 of the light guide 14 is 9 mm .

  Therefore, when the diameter d1 of the light guide 14 is 4 to 9 mm, by setting the depth L1 of the recess 42 to 1.0 to 5.0 mm, the lamp device from any direction within the range where the tip of the light guide 14 is visible. Even looking at 10, you can reproduce the feeling of glitter.

  Thus, by providing the prism 43 on the surface of the concave portion 42 at the end of the light guide 14, the lamp device 10 of the present embodiment reproduces a glittering feeling as if a candle-shaped incandescent clear light bulb is lit. can do.

  When the prism 43 is not provided on the surface of the concave portion 42 at the tip of the light guide 14 and the concave portion 42 is formed as an arc concave surface or a conical concave surface, the light guide is formed even when an aluminum vapor deposition film is formed on the surface of the concave portion 42. The tip of the body 14 appears to glow, and a glittering feeling can be reproduced, but the reflectance of the aluminum vapor deposition film is about 85 to 88%, the reflection loss is large, and the efficiency of the lamp device 10 is lowered.

  On the other hand, by providing the prism 43 on the surface of the concave portion 42 at the tip of the light guide 14, light can be reflected without the aluminum deposition film, and the reflection loss by the prism 43 is the reflection by the aluminum deposition film The efficiency of the lamp device 10 can be increased, as compared to the loss.

  Moreover, by providing the light guide 14 with the plurality of prisms 43, it is possible to reproduce the glittering feeling from any direction of the globe 16 of the lamp device 10.

  Since the number of prisms 43, that is, the number of ridge lines 43a of the prism 43 is 4 to 18, the manufacturability of the prism 43 is good, and the glittering feeling can be reproduced. If the number of ridges 43a is smaller than 4, depending on the direction in which the lamp device 10 is viewed, it may be difficult to obtain a glittering feeling. Therefore, although it is better for the number of ridges 43a of the prism 43 to be large in order to obtain a glittery feeling, when it is more than 18, the manufacturing is difficult. Therefore, the number of ridges 43a of the prism 43 is preferably 4 to 18.

  By setting the apex angle α of the prism 43 to 70 to 90 °, it is possible to reproduce the glittering feeling from any direction within the range where the end of the light guide 14 can be seen, from which the lamp device 10 is viewed.

  In addition, since the ridge lines 43 a of the prism 43 are provided radially, light can be uniformly reflected around the light guide 14.

  Further, since the depth L2 of the valley 43b of the prism 43 on the outer peripheral surface of the light guide 14 is shallower than the depth L1 at the center of the recess 42, the light guided in the light guide 14 is a prism 43 allows reflection in a wide range in the axial direction.

  In addition, since the flat portion 46 is formed at the center of the recess 42, the prism 43 can be formed, and the light guided to the flat portion 46 is transmitted, and in the direction of the tip of the light guide 14 Light distribution characteristics can be improved. However, when the area of the flat portion 46 is too large, the light is emitted too forward, and when the area is too small, the light is not emitted forward, so that the area of the flat portion 46 is The area ratio to the cross section in the direction orthogonal to the axial direction of the light guide 14 is preferably 0.1 to 1.0%.

  Moreover, since the diameter d1 of the light guide 14 is 4 to 9 mm, the efficiency is high, and the glittering feeling can be reproduced. That is, when the diameter d1 of the light guide 14 is smaller than 4 mm, the light emitting unit 37 becomes smaller accordingly and the output becomes low, and the light of the light emitting unit 37 becomes difficult to enter the light guide 14 and the efficiency If the diameter d1 of the light guide 14 is larger than 9 mm, the light emitting portion 45 becomes large, and the glittering feeling decreases.

  Furthermore, since the light emitting portion 45 of the light guide 14 is disposed in the central region in the axial direction of the globe 16, it is possible to reproduce a glittering feeling.

  Further, the size of the incident surface 44 of the light guide 14 is larger than the size of the light emitting portion 37. Therefore, most of the light emitted from the light emitting unit 37 can be made incident on the light guide 14 and incident loss can be reduced, thereby increasing the light emitted from the light emitting unit 45 of the light guide 14, I can improve the sparkling feeling.

  Furthermore, when the light guide 14 is formed of silicone resin, for example, the light guide 14 can be disposed closer to the light emitting portion 37 because it is thermally stronger than acrylic resin, and incident loss can be reduced. Thereby, the light emitted from the light emitting portion 45 of the light guide 14 can be increased, and the glittering feeling can be improved.

  Further, since the light emitting portion 37 and the other end side of the light guide 14 are covered by the cover 15, the light is prevented from being emitted from the vicinity of the housing 11, and the light is emitted only from the tip of the light guide 14. To improve the sense of glitter.

  In addition to the function of covering the light emitting portion 37 and the other end side of the light guide 14, and the function of fixing the heat sink 12 and the light emitting module 13 to the housing 11, the cover 15 Since it also has a fixing function, the number of parts can be reduced and the lamp device 10 can be simplified.

  Further, the inner diameter d2 of the hole 49 of the cover 15 is smaller than the diameter d1 of the light guide 14, and the light guide 14 is fixed to the cover 15 with a simple structure to press fit the light guide 14 into the hole 49. It is possible to improve the assembling ability.

  The lamp device can also be applied to a lamp device using a spherical globe similar to a general lighting incandescent lamp. In this case, by arranging the light emitting portion of the light guide at the center of the largest outer diameter portion of the glove, it is possible to reproduce a glittering feeling.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

10 lamp device
11 Case
14 light guide
16 gloves
19 Power feeding unit
37 light emitting unit
42 recess
43 prism
43H first line
43L second line
46 Flat section

Claims (4)

Housing and
A light emitting unit provided on one end side of the housing;
A transparent glove provided on one end side of the housing so as to cover the light emitting unit;
Diameter is formed in a cylindrical 4～9Mm, one end is protruded into the glove, the other end being opposite to the light emitting portion, the concave portion is provided at one end, and a prism is provided on a surface of said recess And a light guide provided with a flat portion at the center of the recess ;
A feeding unit provided on the other end side of the housing;
A lamp device comprising: Housing and
A light emitting unit provided on one end side of the housing;
A transparent glove provided on one end side of the housing so as to cover the light emitting unit;
It is formed in a cylindrical shape with a diameter of 4 to 9 mm, one end is projected into the globe, the other end is opposed to the light emitting portion, a recess is provided at one end and a prism is provided on the surface of the recess A light guide wherein the ratio of the depth of the recess to the diameter is between 0.25 and 0.55;
A feeding unit provided on the other end side of the housing;
A lamp device comprising: The prisms radiate radially from the center outward, and radially between a plurality of first lines extending from the bottom of the recess toward the one end direction and the first lines outwardly from the center, and the lamp device according to claim 1 or 2, wherein the having a plurality of second lines extending less than the toward the one end direction the first line from the bottom. The lamp device according to any one of claims 1 to 3 , wherein an apex angle of the prism is 70 to 90 ° .

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