CN205424486U - Light device - Google Patents

Abstract

The utility model provides a can reappear the light device just as glittering lighting transparent incandescent lamp bulb and feeling and can improve the adaptability in lighting device. Light device (10) possess framework (11), illuminating part (37), transparent cover (16), light conductor (14) and power supply (19). Illuminating part (37) set up distolateral in framework (11). Lamp shade (16) are with distolateral in framework (11) of the mode setting that covers illuminating part (37). Light conductor (14) form to the diameter is the cylindric of 4~9mm, and its one end is to giving prominence to the other end and illuminating part (37) opposition in the lamp shade (16) to be equipped with concave part (42) in one end, in being provided with on the surface of concave part (42) prism (43). Power supply (19) set up at another of framework (11) distolaterally.

Description

lamp installation

technical field

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

Background technique

Conventionally, there is a transparent incandescent light bulb that uses a transparent glass shade, so that the filament can be directly observed. When the transparent incandescent bulb is turned on, strong light is emitted from the filament that can be directly observed through the glass shade, so that a sense of sparkle can be obtained, and an effect of rendering lighting can be obtained.

In addition, there is also a lamp device that can replace a transparent incandescent bulb, which uses a light emitting element as a light source and uses a transparent lampshade. In this lamp device, the light from the light-emitting element is radiated into the globe through a lens, or a light-emitting module including a plurality of light-emitting elements is arranged in the inner space of the globe.

However, it is difficult to reproduce the sparkling feeling as if a transparent incandescent bulb is lit in a lamp device using a transparent shade. Therefore, the adaptability of the lamp device to a lighting device such as a chandelier using a transparent incandescent light bulb capable of obtaining a sparkling feeling or a lighting device for a store is problematic.

Patent Document 1: Specification of US Patent No. 6803607

Contents of the invention

The technical problem to be solved by the utility model is to provide a lamp device that can reproduce the flickering feeling like lighting a transparent incandescent bulb and can improve the adaptability in the lighting device.

A lamp device according to an embodiment includes a housing, a light emitting unit, a transparent shade, a light guide, and a power supply unit. The light emitting part is provided on one end side of the frame body. The shade 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 with a diameter of 4-9mm, one end of which protrudes into the lampshade, and the other end faces the light emitting part, and a recess is provided at one end, and a prism is provided on the surface of the recess. The power supply unit is provided on the other end side of the housing.

According to the present invention, it is possible to reproduce the sparkling feeling as if a transparent incandescent bulb is turned on, and to improve the adaptability to a lighting device.

Description of drawings

FIG. 1 is a cross-sectional view showing a lamp device according to one embodiment.

Fig. 2 is a perspective view showing an exploded state of the lamp device.

3 is a perspective view showing an exploded state of a light guide, a cover, a light emitting module, and a heat sink of the lamp device.

Fig. 4 is a cross-sectional view showing an exploded state of the light guide and the cover.

Fig. 5 is a perspective view of the above lamp device.

Fig. 6 is a perspective view of a light guide of the lamp device.

Fig. 7 is a cross-sectional view of the light guide.

Fig. 8 is an end view of the light guide.

Fig. 9 is a light distribution diagram of the above lamp device.

10 is a graph showing the relationship between the vertex angle of the prism of the light guide 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°.

11 is a graph showing the relationship between the angle of the concave portion of the light guide 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°.

12 is a graph showing the relationship between the depth/diameter value of the concave portion of the light guide 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°.

In the figure: 10-lamp device, 11-frame body, 14-light guide body, 16-lampshade, 19-power supply part, 37-light emitting part, 42-recessed part, 43-prism, 43H-first line, 43L-first line Second line, 46-plane department.

detailed description

Hereinafter, an embodiment of the present utility model 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 light bulb-shaped lamp that can be attached to a socket for an incandescent light bulb for general lighting, and is a candle-shaped lamp.

The lamp device 10 includes a housing 11 . A radiator plate 12, a light emitting module 13, a light guide 14, a cover 15, and a lampshade 16 are disposed on one end side of the frame body 11, and a casing 17 and a power supply unit 18 are disposed inside the frame body 11. The power supply unit 19 is arranged on the other end side of the body 11 . In addition, the lamp device 10 has a virtual central axis (lamp axis) from the globe 16 to the power supply unit 19, and the side of the globe 16 on the central axis is referred to as one end side, and the side of the power supply unit 19 on the central axis is referred to as the other side. one end side.

Moreover, the frame body 11 is made of a metal material. For example, the frame body 11 is made of cast aluminum. The frame body 11 is formed in a cylindrical shape in which the diameter of one end side is larger than the diameter of the other end side and the diameter decreases from the one end side toward the other end side. A cavity opening toward one end side and the other end side is formed inside the frame body 11 . On one end surface of the frame body 11 is formed a mounting surface 22 on which the peripheral portion of the radiator plate 12 is mounted, and on the mounting surface 22 is formed a plurality of threaded holes 24 for screwing a plurality of screws 23 . 23 is used to integrally fasten the cover 15 , the light emitting module 13 and the heat sink 12 to the mounting surface 22 . In this embodiment, the threaded holes 24 are provided at three positions in the circumferential direction of the frame body 11 , but only two screws 23 are used. An annular protruding portion 25 protrudes from the periphery of the mounting surface 22 , and an annular mounting edge portion 26 protrudes from the inner periphery of the front end of the protruding portion 25 .

Furthermore, as shown in FIGS. 1 to 3 , the radiator plate 12 is made of a metal material such as aluminum in a substantially disc shape. One end surface of the heat sink 12 is in contact with the light emitting module 13 in a thermally conductive manner, and the peripheral portion of the other end surface of the heat sink 12 is placed on the mounting surface 22 of the frame body 11 and in contact with the mounting surface 22 in a thermally conductive manner. An insertion groove 29 for the screw 23 to pass through is formed on the peripheral portion of the heat dissipation plate 12, and a wiring groove 30 for wiring to pass through is also formed on the peripheral portion of the heat dissipation plate 12, and the wiring is used to connect the light emitting module 13 It is electrically connected to the power supply unit 18 .

In addition, in the present embodiment, a COB (Chip On Board, chip on board) module is used as the light emitting module 13 . The light emitting module 13 includes a substrate 33 , a plurality of light emitting elements 34 mounted on the substrate 33 , a frame 35 surrounding the light emitting elements 34 , and a phosphor layer 36 filling the frame 35 to seal the light emitting elements 34 . Furthermore, the surface of the phosphor layer 36 constitutes the light emitting portion 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 thereof. The substrate 33 is made of insulating material or metallic material. In the case where the substrate 33 is made of 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. Linear cutouts 38 to fit the cover 15 are formed in at least three positions on the peripheral portion of the substrate 33 . Furthermore, as shown in FIG. 2 , a light emitting unit 37 is arranged at the center of one end surface of the substrate 33 , and electrical components such as a connector 39 are arranged at a peripheral portion of the one end surface of the substrate 33 . Electrical components such as the connector 39 are electrically connected to the wiring pattern.

LEDs are used for the light emitting element 34 . As the LEDs, blue light-emitting LEDs are used.

The frame portion 35 is made of an insulating material, and is formed in an annular shape on the substrate 33 .

In the phosphor layer 36 , a phosphor that can be excited by light from the light emitting element 34 is contained in a transparent resin. For example, a yellow phosphor that is excited by blue light emitted by a blue light-emitting LED to emit yellow light is included. Thereby, white light is emitted from the surface (light emitting portion 37 ) of the phosphor layer 36 .

In addition, the light emitting part 37 may be comprised by the SMD (Surface Mount Device, surface mount device) package using LED, or organic EL etc. other than LED, for example.

Furthermore, as shown in FIGS. 1 to 4 , the light guide body 14 is made of transparent resin such as silicone resin or glass, and is formed in a cylindrical shape. One end (hereinafter referred to as the front end) of the light guide 14 protrudes into the lamp cover 16 , and the other end of the light guide 14 is fixed to the cover 15 and faces the light emitting unit 37 with a predetermined gap therebetween. A recess 42 is formed on the front end surface of the light guide 14 , and a prism 43 is formed on the surface of the recess 42 .

On the other end surface of the light guide body 14 , an incident surface 44 for allowing the light emitted from the light emitting unit 37 to enter the light guide body 14 is formed. On the front end side of the light guide body 14 is formed a light emitting portion 45 that emits the light incident from the incident surface 44 and guided in the light guide body 14 to the outside of the light guide body 14 . In this light emitting part 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 another part of the light guided in the light guide 14 is transmitted. The prism 43 emits from the front end surface of the light guide 14 . Therefore, the light emitting part 45 is constituted by the front end side of the light guide body 14 provided with the recessed part 42 and the prism 43, and is directed from the light emitting part 45 toward the side intersecting with the axial direction of the light guide body 14, including one end of the light guide body 14. Light is radiated in a wider direction including the rearward direction from the light guide body 14 toward the side of the housing 11 (ie, the front end direction). The light emitted from the light emitting portion 45 of the light guide body 14 can reproduce a sparkling feeling as if a candle-shaped transparent incandescent bulb is lit. The meaning of "shinyness" is "light seems to shine beautifully".

In addition, the diameter d1 of the light guide body 14 is 4 to 9 mm. The light guide body 14 has a cylindrical shape with the same diameter from one end side (tip side) to the other end side, but the diameter of one end side (tip side) may be thinner than the diameter of the other end side, and the diameter increases gradually toward the one end side (tip side). ) tapered conical shape. In addition, the diameter of the light guide body 14 is larger than the diameter of the light emitting portion 37 .

The front end of the light guide body 14 protrudes to a central region in the axial direction inside the globe 16 . The central region in the axial direction in the globe 16 includes the axial center in the globe 16 and the vicinity of the center.

6 to 8 show the concave portion 42 and the prism 43 of the light guide 14 . The recess 42 of the light guide 14 is formed such that the depth L1 from the front end of the light guide 14 is deepest at the center of the recess 42 . The depth L1 of the recessed part 42 is 1.0-5.0 mm. The angle θ of the concave portion 42 with respect to the direction perpendicular to the axial direction of the light guide 14 is 28° to 47°.

A flat portion 46 is formed at the center of the concave portion 42 , and the ratio of the area of the flat portion 46 to the cross-sectional area of the light guide 14 in a direction perpendicular to the axial direction is 0.1 to 1.0%.

The prism 43 has a shape having a plurality of first lines 43H toward the outside (circumferential direction) from the center axis of the light guide body 14 and a plurality of second lines 43L toward one end (front end) from the bottom of the concave portion 42 The direction extends radially, and the second line 43L is incident between the first lines 43H from the central axis toward the outside (circumferential direction) and from the bottom of the recess 42 toward one end (front end) at a height from the incident surface 44 that is farther away from the first line 43H. The face 44 extends radially with a lower height.

Specifically, the prism 43 is formed into a cross-sectional triangular shape having a ridge line 43a and valleys 43b on both sides, and a plurality of prisms 43 are arranged along the circumferential direction of the light guide body 14, and are respectively separated from the central axis of the light guide body 14. radial setting.

The apex angle α of the prism 43 is preferably in the range of 70° to 90°. The apex angle α is an angle on 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 prisms 43) is preferably 4-18. The angle formed between the adjacent ridgelines 43 a and the central axis of the light guide 14 is preferably 20° to 90°. In this embodiment, the number of ridgelines 43 a of the prism 43 is 12, and the angle formed between adjacent ridgelines 43 a and the central axis of the light guide 14 is 30°.

The depth L2 of the valley 43 b of the prism 43 on the outer peripheral surface of the light guide body 14 is shallower than the depth L1 of the center of the concave portion 42 .

Furthermore, as shown in FIGS. 1 to 4 , the cover 15 is made of an insulating resin material. The cover 15 has a conical cover portion 48 whose central top protrudes toward one end side, and the cover 15 is attached to one end side of the frame body 11 to cover the one end side of the frame body 11, the light emitting module 13 and the light guide body 14. Wait on the other side.

A hole portion 49 through which the other end side of the light guide body 14 is inserted is formed at the top in the center of the cover 15 . The hole portion 49 is formed in a cylindrical fixing tube 50 protruding from the top of the cover 15 toward the other end side. A plurality of slits 51 opening toward the other end side are formed in the fixing cylinder 50 so that the other end side of the fixing cylinder 50 can be elastically deformed in the radially outer direction. The inner diameter of the fixed cylinder 50 (that is, the inner diameter of the hole 49 ) becomes smaller from one end side to the other end side, and the inner diameter of the other end side of the hole 49 is the smallest, and the inner diameter d2 of the other end side is smaller than that of the light guide body 14 . diameter d1. Therefore, when the other end side of the light guide 14 is inserted into the hole 49 of the cover 15, the light guide 14 is pressed in so as to elastically deform the fixing cylinder 50 in the radially outer direction, whereby the light guide 14 is pressed in. And it is fixed to the hole part 49 of the cover 15. When the other end side of the light guide 14 is pressed into the hole 49 of the cover 15, the other end surface of the light guide 14 is restricted by the stopper arranged in a positional relationship with the cover 15, so that the light guide can be controlled. The axial positions of the body 14 and the cover 15 are positioned. In addition, the light guide body 14 and the cover 15 may be bonded together with an adhesive so as to be securely fixed.

Two insertion holes 52 through which the two screws 23 are respectively inserted are formed on the peripheral portion of the cover 15 , and a protrusion is provided at a position opposite to the two insertion holes 52 to engage with the mounting edge portion 26 of the frame body 11 . The claw portion 53.

A fitting portion 54 for fitting the substrate 33 of the light emitting module 13 is formed on the other end side of the cover 15 . The fitting portion 54 has protrusions 55 into which the cutouts 38 provided at three positions around the substrate 33 are respectively fitted. The insertion holes 52 are respectively formed at the positions of the two protrusions 55 , and the claws 53 are protrudingly provided at the position of the remaining one protrusion 55 .

Moreover, the lampshade 16 is made of a transparent material with a light transmittance of more than 95%. As the transparent material, resin or glass is used. The globe 16 has a hollow shape, is formed in a conical shape that becomes thinner toward one end side, and has an opening on the other end side. The globe 16 may be a so-called PS type spherical shape. On the other end side of the globe 16 , a fixing edge 58 fitted inside the mounting edge portion 26 of the frame body 11 and bonded and fixed with, for example, a silicone adhesive or the like is protrudingly provided. In addition, a light emitting portion 45 at the front end of the light guide body 14 is arranged in the central region of the globe 16 in the axial direction.

Furthermore, the housing 17 is formed in a cylindrical shape from an insulating resin material. Case 17 is fixed to frame body 11 by inserting case 17 into frame body 11 from one end side and attaching fixing ring 61 to the other end side of case body 17 protruding from the other end side of frame body 11 . A power supply unit 19 is attached to the other end side of the casing 17 . A pair of substrate holding portions 62 are formed along the central axis at two positions facing each other in the casing 17 .

Furthermore, the power supply unit 18 converts the AC power input from the power supply unit 19 into predetermined DC power and supplies the DC power to the light emitting elements 34 of the light emitting module 13 . The power supply unit 18 has 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 to be held by the case 17 . Furthermore, a pair of AC power input parts of the power supply part 18 is electrically connected to the power supply part 19 through wiring, and a pair of DC power output parts of the power supply part 18 is electrically connected to the connector 39 of the light emitting module 13 through wiring.

Moreover, the power supply part 19 uses the base which can be connected to the socket for incandescent light bulbs for general lighting, such as E17 and E26, for example. In addition, the power feeding part 19 is not limited to a cap, and may be a pair of pins depending on the type of lamp.

Next, the operation of this embodiment will be described.

When assembling the lamp device 10, the casing 17 and the power supply unit 18 are assembled in the frame body 11, and the heat dissipation plate 12 and the light emitting module 13 are arranged on one end side of the frame body 11, and the power supply unit 18 and the light emitting module 13 are connected with wires. Connector 39.

Then, the claw portion 53 of the cover 15 is engaged with the mounting edge portion 26 of the frame body 11 to cover the light emitting module 13 with the cover 15, and the screw 23 is passed through the insertion hole 52 of the cover 15 and the insertion groove 29 of the radiator 12. And screwed into the threaded hole 24 of the frame body 11 , thereby the cover 15 , the substrate 33 of the light emitting module 13 and the heat dissipation plate 12 are fixed on the frame body 11 together, and the substrate 33 and the heat dissipation plate 12 are thermally connected with the frame body 11 .

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

In addition, when the lamp device 10 is used, the power supply unit 19 is connected to a socket for an incandescent bulb for general lighting 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 the DC power to the light emitting element 34 . As a result, the light emitting element 34 is made to emit light, and the light is emitted from the light emitting unit 37 .

The light emitted from the light emitting portion 37 enters the light guide 14 from the incident surface 44 and is guided toward the light emitting portion 45 within the light guide 14 . A part of the light guided to the light emitting portion 45 is reflected by the prism 43 and radiated from the peripheral surface of the light guide 14, while another part of the light guided to the light emitting portion 45 passes through the prism 43 and is emitted from the front end of the light guide 14. surface radiation. Therefore, the light emitting portion 45 of the light guide 14 can be directed toward the direction including the front end of the light guide 14 , the lateral direction intersecting the axial direction of the light guide 14 , and the rearward direction from the light guide 14 toward the side of the housing 11 . The light is radiated in a wide direction including the direction. The light emitted from the light emitting portion 45 of the light guide body 14 passes through the globe 16 and is irradiated to the lighting space.

The light reflected by the prism 43 has the following cases: the light incident on the surface of the prism 43 is directly radiated from the peripheral surface of the light guide 14, or the light incident on one side surface of the prism 43 is reflected to the other side surface and then radiated from the light guide The peripheral surface of the body 14 radiates.

FIG. 9 shows a light distribution diagram of the lamp device 10 . At this time, 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 obtain a sparkle feeling regardless of viewing from any direction in the range where the front end of the light guide body 14 can be seen.

At this time, the luminous intensity at the front end direction of the lamp device 10, that is, at a light distribution angle of 0° is 19 cd, the luminous intensity at a light distribution angle of 120°, which is a representative angle behind the lamp device 10, is 7 cd, and the luminous intensity at a light distribution angle of 120° is 7 cd. The ratio of the luminous intensity to the light distribution angle of 0° is 0.368.

Therefore, it was found that when the ratio of the luminous intensity at a light distribution angle of 120° to the luminous intensity at a light distribution angle of 0° is 0.3 or more, the sparkle feeling can be reproduced. Therefore, the ratio of the luminous intensity at a light distribution angle of 120° to the luminous intensity at a light distribution angle of 0° is preferably 0.3 or more as a threshold value, and the concave portion 42 and the prism 43 of the light guide 14 are defined accordingly.

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°. When the apex angle α of the prism 43 is in the range of 70° to 90°, the ratio of the luminous intensity at a light distribution angle of 120° to the luminous intensity at a light distribution angle of 0° is 0.3 or more. Therefore, by setting the apex angle α of the prism 43 to 70° to 90°, the light device 10 can be viewed from any direction in the range where the front end of the light guide body 14 can be seen, so that a flickering feeling can be reproduced.

FIG. 11 shows the relationship between the angle θ of the concave portion 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°. When the angle θ of the concave portion 42 is in the range of 28° to 47°, the ratio of the luminous intensity at a light distribution angle of 120° to the luminous intensity at a light distribution angle of 0° becomes 0.3 or more. Therefore, by setting the angle θ of the concave portion 42 to 28° to 47°, the light device 10 can be viewed from any direction in the range where the front end of the light guide body 14 can be seen, and the sparkle feeling can be reproduced.

12 shows the relationship between the value of the depth L1/diameter d1 of the concave portion 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 diameter d1 of the light guide body 14 is related to the ratio of the luminous intensity at a light distribution angle of 120° to the luminous intensity at a light distribution angle of 0°. When the diameter d1 of the light guide body 14 is 4 to 9 mm, if the light distribution angle The ratio of the luminous intensity at 120° to the luminous intensity at a light distribution angle of 0° satisfies 0.3 or more, and the value of the depth L1/diameter d1 of the concave portion 42 of the light guide 14 is preferably 0.25 to 0.55.

From this relationship, the depth L1 of the concave portion 42 at which the ratio of the luminous intensity at a light distribution angle of 120° to the luminous intensity at a light distribution angle of 0° becomes 0.3 or more is 1.5 to 3.2 mm when the diameter d1 of the light guide 14 is 6 mm. The diameter d1 of the light guide 14 is 1.0 to 2.2 mm when it 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 body 14 is 4 to 9 mm, by setting the depth L1 of the concave portion 42 to 1.0 to 5.0 mm, the lamp can be viewed from any direction in the range where the front end of the light guide body 14 can be seen. The devices 10 are all capable of reproducing the sparkle.

Thus, in the lamp device 10 of the present embodiment, by providing the prism 43 on the surface of the concave portion 42 at the front end of the light guide 14 , it is possible to reproduce the flickering feeling as if a candle-shaped transparent incandescent bulb is lit.

However, even if no prism 43 is provided on the surface of the concave portion 42 at the front end of the light guide 14, the concave portion 42 is formed as an arcuate concave surface or a conical concave surface, and an aluminum-evaporated film is formed on the surface of the concave portion 42, it still looks like a light guide body. The front end of 14 is glowing, and it is possible to reproduce the sparkling feeling. However, the reflectance of the aluminum-evaporated film is about 85 to 88%, and its reflection loss is relatively large, resulting in a decrease in the efficiency of the lamp device 10 .

In this regard, by providing the prism 43 on the surface of the concave portion 42 at the front end of the light guide 14, light can be reflected even without an aluminized film, and the reflection loss of the prism 43 is smaller than that of the aluminized film, so that the lamp device can be improved. 10 efficiency.

Furthermore, since the light guide body 14 is provided with a plurality of prisms 43 , the light shade 16 of the lamp device 10 can be viewed from any direction to reproduce a sparkling feeling.

Since the number of prisms 43 (that is, the number of ridgelines 43 a of the prisms 43 ) is 4-18, the manufacturability of the prisms 43 is good and the sparkling feeling can be reproduced. If the number of ridgelines 43 a is less than four, it may be difficult to obtain a sparkle feeling depending on the direction of the observation lamp device 10 . Therefore, in order to obtain a sparkling feeling, the number of ridgelines 43a of the prism 43 should be as large as possible, but if it exceeds 18, manufacturing will be difficult. Therefore, it is preferable that the number of ridgelines 43a of the prism 43 is 4-18.

By setting the apex angle α of the prism 43 to 70° to 90°, the light device 10 can be viewed from any direction within the range where the front end of the light guide 14 can be seen, and the sparkle feeling can be reproduced.

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

In addition, 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 of the center of the concave portion 42, it can be reflected in the light guide 14 by the prism 43 in a wide range in the axial direction. Light that guides the light.

And, since the flat portion 46 is formed at the center of the concave portion 42, the formation of the prism 43 becomes possible, and the light guided to the flat portion 46 can be transmitted through the flat portion 46, thereby improving the front end toward the light guide body 14. Directional light distribution characteristics. However, if the area of the planar portion 46 is too large, too much light is emitted forward, and if the area of the planar portion 46 is too small, the light cannot be emitted forward. Therefore, in order to maintain appropriate light distribution characteristics, it is preferable that the planar portion The ratio of the area of 46 to the area of the cross section of the light guide 14 in the direction perpendicular to the axial direction is 0.1 to 1.0%.

In addition, since the diameter d1 of the light guide body 14 is 4 to 9 mm, it is highly efficient and can reproduce a sparkling feeling. That is, if the diameter d1 of the light guide body 14 is smaller than 4 mm, the output of the light emitting portion 37 decreases due to the decrease in size, and the light from the light emitting portion 37 hardly enters the light guide body 14 , resulting in a decrease in efficiency. In addition, if the diameter d1 of the light guide body 14 is larger than 9 mm, the light emitting portion 45 will also become larger, resulting in a reduction in the sparkle.

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

Furthermore, the size of the incident surface 44 of the light guide body 14 is larger than the size of the light emitting unit 37 . Therefore, most of the light emitted from the light emitting portion 37 can be made incident on the light guide 14, and the incident loss can be reduced, whereby the light emitted from the light emitting portion 45 of the light guide 14 can be increased and the sparkle feeling can be improved. .

In addition, when the light guide body 14 is formed of silicone resin, since it is more heat-resistant than, for example, acrylic resin, the light guide body 14 can be placed closer to the light emitting portion 37, thereby reducing incident loss. Thereby, the light emitted from the light emitting portion 45 of the light guide body 14 can be increased, and the sparkle feeling can be improved.

Moreover, since the other end side of the light-emitting part 37 and the light guide body 14 is covered with the cover 15, the light can be prevented from being emitted from the vicinity of the frame body 11, so that the light is only emitted from the front end of the light guide body 14, and the sparkle feeling can be improved. .

Moreover, since the cover 15 has the function of covering the other end side of the light emitting part 37 and the light guide 14 and the function of fixing the heat dissipation plate 12 and the light emitting module 13 to the frame body 11, it also has the function of fixing the light guide 14. Therefore, the number of parts can be reduced, and the lamp device 10 can be simplified.

Moreover, since 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 pressed and fixed to the hole 49, the light guide 14 can be fixed to the cover with a simple structure. 15. Can improve assembly.

In addition, the lamp device can also be applied to a lamp device using a globe similar to an incandescent bulb for general lighting. At this time, by arranging the light emitting portion of the light guide at the center of the maximum outer diameter portion of the globe, it is possible to reproduce a sparkling feeling.

As mentioned above, although some embodiment of this invention was illustrated, these embodiment is only an illustration, and is not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the gist of the present invention. These embodiments and their modifications all belong to the scope or gist of the present invention, and are also included in the utility model described in the technical solution and its equivalent scope.

Claims (5)

1. a lamp device, it is characterised in that possess:

Framework；

Illuminating part, is arranged on the end side of described framework；

Transparent lamp shade, is arranged on the end side of described framework in the way of covering described illuminating part；

Light conductor, be formed as a diameter of 4～9mm cylindric, its one end is prominent in described lampshade, and the other end is opposed with described illuminating part, and is at one end provided with recess, and the surface configuration at described recess has prism；

Power supply section, is arranged on another side of described framework.

Lamp device the most according to claim 1, it is characterised in that

Described prism has multiple First Line and multiple second line, described First Line from centrally directed outside and from the bottom of described recess towards an extreme direction radiated entends, described second line between described First Line from centrally directed outside and from described bottom towards extreme direction radiated entends in the way of lower than described First Line.

Lamp device the most according to claim 1 and 2, it is characterised in that

The drift angle of described prism is 70～90 °.

Lamp device the most according to claim 1 and 2, it is characterised in that

Described light conductor has planar portions at the center of described recess.

Lamp device the most according to claim 1 and 2, it is characterised in that

The degree of depth of described recess is 0.25～0.55 with the diameter ratio of described light conductor.