JP2010225507A - Light-emitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-emitting device capable of fixing an outer enclosure member to a light source side unit without using a screw. <P>SOLUTION: The light-emitting device 1 having a LED light source 2 includes a lens 3 to which light emitted from the LED light source 2 is made incident, a cover member 4 mounted on the lens 3 and covering the LED light source 2, a first engaging mechanism 9 engaging the lens 3 to the cover member 4 and making the cover member 4 impossible to secede from the lens 3 after engaging the lens 3 to the cover member 4, a cap member 5 mounted on the cover member 4 and covering the cover member 4, and a second engaging mechanism 10 for disengageably engaging the cover member 4 to the cap member 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a light emitting device that emits light emitted from an LED light source to the outside through a lens.

  Conventionally, as this type of light-emitting device, an LED lamp including an electrical circuit board and at least one light-emitting diode installed on the electrical circuit board is disposed in the first space of the shade body, and a reflective cover having a shape surrounding the light-emitting diode, There is known a light-emitting device that is provided on a cover and provided with a transparent cover that is provided in front of a light-emitting diode (for example, see Patent Document 1). In this light emitting device, the power joint is installed on the second space of the shade body, and the power joint, the shade, and the reflective cover are integrated by screws.

  In addition, as another light emitting device, a circular substrate on which four white light emitting diodes are fixed, a lens fixing plate arranged on the front side of the circular substrate by a rod-like spacer and spaced apart by a certain distance, and the light emitting diodes on the lens fixing plate A lens fitted in a corresponding state, a front cover positioned on the front side of the lens fixing plate and fixedly holding each lens in cooperation with the lens fixing plate, and connected and fixed to the back side of the circular substrate What is formed by the heat-radiation bracket currently used and the lamp shade which fixes this heat-radiation bracket to an inner surface part is known (for example, refer to patent documents 2). In this light emitting device, the lamp shade is fixed with screws by a heat radiating bracket.

Utility Model Registration No. 3146696 JP 2006-294526 A

  However, in the light emitting devices described in Patent Documents 1 and 2, the shade that forms the outer member of the device is fixed with screws. As described above, when the outer member such as the shade and the cap member is fixed with the screw, the light source unit may fall off the outer member due to the looseness of the screw.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a light emitting device capable of fixing an outer member to a light source side unit without using a screw.

  According to the present invention, an LED light source, a lens to which light emitted from the LED light source is incident, a cover member attached to the lens and covering the LED light source, the lens and the cover member are engaged, A first engagement mechanism that prevents the cover member from being detached from the lens after joining, a cap member that is attached to the cover member and covers the cover member, and the cover member and the cap member are detachably engaged. And a second engagement mechanism to be combined.

  In the light emitting device, the first engagement mechanism includes a protrusion provided on one of the lens and the cover member, a recess provided on the other of the lens and the cover member, and a recess engaged with the protrusion. You may have.

  In this light emitting device, the cover member has a main body formed in a cylindrical shape covering the LED light source, and a plurality of protrusions formed on an inner peripheral surface of the main body, and the lens is You may have the protrusion part arrange | positioned inside a main body, and the recessed part which is formed in the base end side of the said protrusion part, and can receive the said several protrusion part.

  In this light emitting device, the cover member may have a rib portion that is formed on an inner peripheral surface of the main body and positions the LED light source.

  In this light-emitting device, the LED light source includes a substrate and an LED device mounted on the substrate, and the lens includes a receiving hole that receives the LED device at a tip of the protrusion, The board | substrate may contact | abut with the front-end | tip of the said protrusion part of the said lens.

  In the light emitting device, the second engagement mechanism includes a claw provided on one of the cover member and the cap member and a claw provided on the other of the cover member and the cap member. And an engaged portion.

  According to the present invention, the cap member can be fixed to the light source side unit including the LED light source, the lens, and the cover member without using a screw. Moreover, since the cover member engaged with the lens cannot be detached from the lens, the LED light source covered by the cover member can be protected accurately.

FIG. 1 is a longitudinal sectional view of a light-emitting device showing an embodiment of the present invention. FIG. 2 is an exploded perspective view of the light emitting device. 3A and 3B are views for explaining the cover member, in which FIG. 3A is a plan view of the cover member, FIG. 3B is a longitudinal sectional view of the cover member, and FIG. 3C is a bottom view of the cover member. is there. FIG. 4 is an external perspective view of the light emitting device. FIG. 5 is a longitudinal sectional view of a light emitting device showing a modification. FIG. 6 is a longitudinal sectional view of a light emitting device showing a modification. FIG. 7 is a longitudinal sectional view of a light emitting device showing a modification.

1 to 4 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a light emitting device showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the light emitting device.
As shown in FIG. 1, the light emitting device 1 includes an LED light source 2, a lens 3 on which light emitted from the LED light source 2 is incident, a cover member 4 attached to the lens 3 and covering the LED light source 2, and attached to the cover member 4. And a cap member 5 that covers the cover member 4. In addition, the light emitting device 1 includes a harness 6 for supplying power to the LED light source 2 and a pipe 7 in which the harness 6 is accommodated. Furthermore, the light-emitting device 1 includes a first engagement mechanism 9 that engages the lens 3 and the cover member 4 so that the cover member 4 cannot be detached from the lens 3 after the engagement, and the cover member 4 and the cap member 5. And a second engagement mechanism 10 that is detachably engaged. Hereinafter, each part of the light-emitting device 1 will be described in detail.

  The LED light source 2 includes an LED device 21 and a substrate 22 on which the LED device 21 is mounted. A connector 23 connected to the connector 61 of the harness 6 is disposed on the back surface of the substrate 22.

  The LED device 21 is a surface-mount type LED package having a case having a recess in which an LED element is disposed, and the inside of the recess is sealed with a resin. The LED element emits blue light containing a GaN-based material, and the sealing resin includes a phosphor that emits yellow light when excited by the blue light. The LED device 21 emits white light by a combination of blue light and yellow light.

  The substrate 22 is formed in a rectangular shape, and electrically connects the LED device 21 mounted on the front surface and the connector 23 disposed on the back surface. Although the material used as the base material of the board | substrate 22 is arbitrary, it is desirable for the surface to form the reflective layer with a higher reflectance than a base material. For example, when a glass epoxy substrate is used as the substrate 22, it is preferable to form a white resin as the reflective layer on the surface.

  The connector 23 is erected on the back surface of the substrate 22 and has a rectangular parallelepiped shape. The connector 23 has an opening on the surface opposite to the substrate 22 and can be electrically connected to the connector on the harness 6 side.

  The lens 3 is made of a transparent material such as resin or glass, and has a substantially oval outer shape. The lens 3 has a receiving hole 31 for receiving the LED device 21 on one end side in a predetermined direction. In FIG. 1, the predetermined direction is the vertical direction, and one end side is the upper end side. From here, according to FIG. 1, the predetermined direction will be described as the vertical direction. In the present embodiment, the lens 3 is a rotationally symmetric body around a central axis M that coincides with the optical axis of the LED device 21.

  The lens 3 is formed in a solid shape, and includes a protruding portion 37 disposed inside the main body 41 of the cover member 4 and a concave portion 36 formed on the proximal end side of the protruding portion 37. In the present embodiment, the protruding portion 37 is formed in a hemispherical shape at the upper end of the lens 3. The surface of the lens 3 is inclined outwardly in the radial direction from the radial outer edge of the contact surface 33, the protruding surface 32 that forms the surface of the protruding portion 37, the contact surface 33 that extends radially outward from the lower end of the protruding surface 32. And an inclined surface 34 extending downward, and a lower end surface 35 inclined downward inward in the radial direction from the lower end of the inclined surface 34 and extending downward.

  As shown in FIG. 2, the receiving hole 31 is formed from the upper end of the protruding portion 37 toward the lower side of the lens 3. In the present embodiment, the receiving hole 31 is formed in a substantially cylindrical shape, and the lower end forms a flat surface 31a. The flat surface 31a is effective for guiding light emitted from the LED device 21 downward.

  At the upper end of the projecting surface 32, a flat surface 32a surrounding the portion where the receiving hole 31 is formed is formed. The flat surface 32a forms a contact surface with the substrate 22, and the vertical position of the substrate 22 with respect to the lens 3 is uniquely determined. In addition, a recess 36 that is recessed radially inward is formed at the lower end of the projecting surface 32. In the present embodiment, the recess 36 is formed over the circumferential direction and is configured to receive the protrusion 45 of the cover member 4.

  The contact surface 33 is formed flat, and the lower ends of the cover member 4 and the cap member 5 are in contact with each other. In the present embodiment, the contact surface 33 is formed horizontally and has a donut shape surrounding the protruding surface 32 in plan view.

  The inclined surface 34 is formed so as to increase in diameter from the top to the bottom, and light having an angle of 15 ° to 30 ° with respect to the central axis M is incident on the light emitted from the LED device 21. In the present embodiment, the inclined surface 34 is linearly formed in the longitudinal section. Light that is directly incident on the inclined surface 34 from the LED device 21 is reflected toward the lower end surface 35 by the inclined surface 34.

  The lower end surface 35 is formed so as to be constricted downward, and of the light emitted from the LED device 21, light having an angle of up to 15 ° with respect to the central axis M is incident. In the present embodiment, the lower end surface 35 has a shape in which rotating paraboloids around the central axis M are gathered. Of the light directly incident on the lower end surface 35 from the LED device 21, light having an angle of 6 ° with respect to the central axis M is refracted by the lower end surface 35 and then radiated downward from the lens 3. Of the light directly incident on the lower end surface 35 from the LED device 21, the light having an angle of 6 ° to 15 ° with the central axis M is reflected toward the lower end of the lens 3 by the lower end surface 35. The light reflected toward the lower end surface 35 is refracted by the lower end surface 35 and then radiated radially outward from the lens 3.

3A and 3B are diagrams for explaining the cover member, in which FIG. 3A is a plan view of the cover member, FIG. 3B is a longitudinal sectional view of the cover member, and FIG. 3C is a bottom view of the cover member. .
As shown in FIG. 3, the cover member 4 is formed in a cylindrical shape centered on a central axis M that expands downward. Although the material of the cover member 4 is arbitrary, in this embodiment, polyacetal is used and it is exhibiting black. As shown in FIG. 3A, the cover member 4 includes a main body 41 that expands downward, an upper surface portion 42 that is formed to close the upper end of the main body 41, and an insertion formed on the upper surface portion 42. A hole 43, a claw portion 44 formed at the center of the upper and lower sides of the main body 41 and engaged with the cap member 5, a protrusion 45 formed at the lower end of the inner surface of the main body 41 and fitted into the recess 36 of the lens 3, And a rib portion 46 for positioning the LED device 2. The main body 41 and the upper surface portion 42 are formed with a constant thickness.

  As shown in FIG. 3B, the insertion hole 43 is formed so as to insert the connector 23 of the LED device 21. The upper end of the connector 23 and the upper end of the cover member 4 are formed at the same height, and the connector 23 is exposed from the upper surface portion 42 of the cover member 4 with the connector 61 of the harness 6 removed.

  A plurality of claw portions 44 are formed at equal intervals in the circumferential direction at the upper and lower central portions of the main body 41. In the present embodiment, the claw portions 44 are formed at three locations at intervals of 60 ° in the circumferential direction. The claw portion 44 is disposed inside the hole portion 47 formed in the main body 41, and is formed at an extension portion 44a extending downward from the upper end of the hole portion 47 and at a lower end of the extension portion 44a, and radially outward. And a protruding portion 44b that protrudes. Since the extending portion 44a extends vertically, it is easy to be elastically deformed, and allows the protrusion 44b to be displaced inward in the radial direction.

  As shown in FIG. 3 (c), a plurality of protrusions 45 are formed at equal intervals in the circumferential direction at the lower end of the inner surface of the main body 41. In the present embodiment, the protrusions 45 are formed at three locations at intervals of 60 ° in the circumferential direction. Since the lower end opening of the main body 41 is not formed with a cut or the like and has a closed cross section, it is difficult to deform, and the displacement of each protrusion 45 in the radial direction is not allowed. The protrusion 45 fits into the recess 36 of the lens 3 without a gap. In the present embodiment, the first engagement mechanism 9 has a projection 45 provided on the cover member 4 and a recess 36 provided on the lens 3 and engaged with the projection 45.

  The rib portion 46 extends vertically on the inner surface of the main body 41, and the upper end is integrated with the lower surface of the upper surface portion 42. The rib 46 has a constant thickness in the vertical direction and is formed perpendicular to the substrate 22 of the LED device 21. The end surfaces of the ribs 46 are a guide portion 46a inclined radially inward from the lower end upward, a vertical portion 46b extending upward from the upper end of the guide portion 46a, and a horizontal portion extending radially inward from the upper end of the vertical portion 46b. 46c and a connecting portion 46d extending upward from the radially inner end of the horizontal portion 46c.

  In the present embodiment, the rib portion 46 is formed at one location on the front side and the rear side of the LED device 21 and two locations on the left side and the right side of the LED device 21. When the LED device 21 is inserted into the cover member 4 and moved upward, the LED device 21 is guided back and forth and left and right by the guide portions 46a of the rib portions 46, and when the upper surface of the substrate 22 comes into contact with the horizontal portion 46c, the LED device. 21 is positioned in front, rear, left and right. In the present embodiment, the vertical dimension of the vertical portion 46 b is equal to the thickness dimension of the substrate 22.

  As shown in FIG. 1, the cap member 5 is formed in a hollow conical shape with a central axis M whose diameter is reduced upward. The material of the cap member 5 is arbitrary, but in this embodiment, ABS (acrylonitrile_Butadiene_Styrene) resin is used, and the outer surface is chrome plated. The outer surface of the cap member 5 is formed flush with the inclined surface 34 that forms the outer surface of the lens 3.

  The cap member 5 has a main body 51 that expands downward, an insertion hole 52 formed in the upper end of the main body 51, and a concave groove 53 formed in the inner surface of the main body 51. The insertion hole 52 is inserted through the pipe 7 including the harness 6. The concave groove 53 as the engaged portion is formed below the inner surface of the main body 51 and is formed over the circumferential direction. The cap member 5 is removably attached to the cover member 4 by receiving the claw portion 44 of the cover member 4 through the concave groove 53. In the present embodiment, the second engagement mechanism 10 includes a claw portion 44 provided in the cover member 4 and a concave groove 53 provided in the cap member 5.

  The harness 6 has flexibility and electrically connects the LED device 21 and an external power source. The harness 6 has a connector 61 that can be connected to the connector 23 of the LED device 21 at one end, and the other end is connected to the external power supply side through the pipe 7.

  The pipe 7 has a circular cross section. The material of the pipe 7 is arbitrary, but stainless steel is used in this embodiment. A hole 71 is formed at the tip of the pipe 7. A cylindrical collar member 8 is fixed to the tip of the pipe 7, and the collar member 8 abuts against the inner surface of the cap member 5, thereby preventing the pipe 7 from falling off the cap member 5. The collar member 8 has a claw portion 81 that is detachable from the hole portion 71 of the pipe 7.

The light emitting device 1 configured as described above is manufactured through the following steps.
First, the LED device 21 is fabricated by mounting the LED element and the connector 23 on the substrate 22. Then, the LED device 21 is inserted into the cover member 4, and the cover member 4 is attached to the lens 3 in a state where the LED device 21 is positioned in the front, rear, left and right directions with respect to the cover member 4. Thereby, each protrusion 45 of the cover member 4 fits into the recess 36 of the lens 3, and the cover member 4 cannot be detached from the lens 3. Thereby, the light source side unit is completed.

  On the other hand, the harness 6 is inserted into the pipe 7, and one end side of the pipe 7 is inserted into the insertion hole 52 of the cap member 5. Then, after attaching the collar member 8 to one end of the pipe 7, the connector 61 is attached to the harness 6. Thereafter, the connector 61 of the harness 6 and the connector 23 of the light source side unit are connected. Next, the cap member 5 is brought close to the lens 3 side, the concave groove 53 of the cap member 5 and each claw portion 44 of the cover member 4 are engaged, and the cap member 5 and the cover member 4 are fixed, and the light emitting device 1 is completed. The other end side of the pipe 7 is suspended from the ceiling side.

  According to the light emitting device 1 of the present embodiment, the cap member 5 can be fixed to the light source side unit including the LED light source 2, the lens 3, and the cover member 4 without using a screw. Therefore, the fixing portion is not loosened due to vibration or the like, and the light source side unit can be prevented from falling off the cap member 5.

  Moreover, compared with the conventional light-emitting device, a fastening member such as a screw can be omitted to reduce the number of parts. Furthermore, by omitting the fastening process, the assembly time between the light source unit and the cap member 5 can be shortened, which is effective in reducing the manufacturing cost.

  Further, since the cover member 4 can be engaged with the lens 3 and cannot be detached after the engagement with the lens 3, the LED light source 2 and the cover member 4 can be easily and easily attached to the lens 3 side at the time of manufacture. The LED light source 2 covered with the cover member 4 at the time of use can be protected exactly. In particular, it is possible to prevent the user or the like from accidentally removing the cover member 4 and damaging the LED light source 2.

  Further, since the cover member 4 is detachable from the cap member 5, the LED light source 2 can be exchanged together with the cover member 4 and the lens 3 even if the LED light source 2 is turned off or the amount of light is reduced. Thus, the light emitting device 1 can be used continuously. In addition, the cover member 4, the lens 3, and the LED light source 2 can be exchanged for different specifications according to the use application of the light emitting device 1, and the color and light amount of the LED light source 2 can be changed or the shape of the lens 3 can be changed. Can be changed to change the light emission state. Moreover, in this embodiment, since the cover member 4 is reflected in the lower end of the lens 3 and forms a part of the design, the light emitting device 1 is changed in design by changing the color of the cover member 4. You can also.

  Further, the LED light source 2 and the lens 3 are positioned in the vertical direction when the substrate 22 and the protruding surface 32 come into contact with each other. The LED light source 2 is positioned in the front, rear, left, and right directions when the substrate 22 and the rib portion 46 abut against the cover member 4, and the cover member 4 surrounds the protruding surface 32 of the lens 3 in plan view. Therefore, the LED light source 2 is positioned front-rear and left-right with respect to the lens 3 via the cover member 4. Thereby, the LED light source 2 can be accurately positioned with respect to the lens 3. In addition, the protrusion 45 of the cover member 4 and the concave portion 36 of the lens 3 are fitted with no gap, so that the cover member 4 and the LED light source 2 play against the lens 3 after the cover member 4 is attached to the lens 3. There is no such thing.

Further, since the lower ends of the cover member 4 and the cap member 5 are in contact with the contact surface 33 of the lens 3, dust or the like enters the LED light source 2 side through the gap between the cover member 4, the cap member 5 and the lens 3. The LED light source 2 and the electrical connection site can be protected accurately.
Further, as shown in FIG. 4, the cap member 5 and the lens 3 are in contact with each other, and the outer surface of the cap member 5 is flush with the outer surface of the lens 3, so that the cap member 5 and the lens 3 are integrated. The impression can be given to the viewer. Here, FIG. 4 is an external perspective view of the light emitting device.

  In addition, since the receiving hole 31 has a cylindrical shape and the lower side of the LED light source 2 has a flat surface 31a, the angle formed by the central axis M of the lens 3 with much of the light emitted from the LED light source 2 becomes small. It can be guided into the lens 3. Thereby, more light can be guide | induced to the lower end of the lens 3, and the emitted light amount of the lower end of the lens 3 can be increased.

  In addition, in the said embodiment, although the substantially egg-shaped lens 3 was illustrated, the shape of the lens 3 can be changed arbitrarily. For example, as shown in FIG. 5, the light emitting device 101 may be configured such that the inclined surface 134 of the lens 103 is inclined inward in the radial direction and the curvature of the lower end surface 135 is relatively small. For example, as shown in FIG. 6, the lens 203 includes a side surface 236 extending from the radial outer edge of the horizontal surface 33 in parallel with the central axis, and an inclined surface 234 extending downward from the lower end of the side surface 236 inward in the radial direction. And a lower end surface 235 that inclines radially inward from the lower end of the inclined surface 234 and extends downward. Further, for example, as shown in FIG. 7, the lens 303 includes a side surface 336 extending in parallel with the central axis from the radial outer edge of the horizontal surface 33, and a lower end surface 335 extending downward from the lower end of the side surface 336 by inclining radially inward. The light emitting device 301 may include

  Moreover, in the said embodiment, the 1st engagement mechanism 9 shows what has the protrusion part 45 formed in the main body 41 of the cover member 4, and the recessed part 36 formed in the protrusion part 37 of the lens 3. FIG. However, a recess may be formed on the cover member 4 side, and a protrusion may be formed on the lens 3 side. Further, as the first engagement mechanism 9, a combination other than the protrusion and the recess can be used. In short, it is sufficient that the cover member 4 can be engaged with the lens 3 and cannot be detached from the lens 3 after the engagement.

  Moreover, in the said embodiment, although the 2nd engagement mechanism 10 showed what has the nail | claw part 44 formed in the main body 41 of the cover member 4, and the ditch | groove 53 formed in the cap member 5. A concave groove may be formed on the cover member 4 side, and a claw portion may be formed on the cap member 5 side. Further, as the second engagement mechanism 10, a combination other than the claw portion and the groove can be used. In short, the cover member 4 and the cap member 5 may be engaged with each other in a freely detachable manner.

  In the embodiment, the LED device 21 and the lens 3 are separated from each other by the receiving hole 31. However, the LED device 21 may be brought into contact with the lens 3. Thereby, air does not intervene between LED device 21 and lens 3, and optical control becomes easy. Further, a flexible diffusion sheet may be provided between the LED device 21 and the lens 3 in the receiving hole 31 so that air does not enter between the LED device 21 and the lens 3.

In the above embodiment, the receiving hole 31 has a cylindrical shape. However, the receiving hole 31 may have a polygonal column shape or a hemispherical shape.
Moreover, although the main body 41 of the cover member 4 is formed in a cylindrical shape, it may have another cylindrical shape such as a rectangular tube shape. Furthermore, the cover member 4 may be hemispherical, for example, and its shape can be arbitrarily changed.

  Moreover, the structure of the LED light source 2 is also arbitrary, for example, it is good also as a structure which does not provide a board | substrate, or a structure using a bullet-type LED device, for example. The light emission color of the LED light source 2 is also arbitrary, and may be white as in the above embodiment, or may be red, orange, green, blue, or the like.

  In the above embodiment, the lens 3 is colorless and transparent. However, it is needless to say that the colored lens 3 may be used. In addition, although the lens 3 is exemplified as one in which light emission concentrates at the lower end, the lens 3 that emits light uniformly may be used as a whole, and it is needless to say that other detailed configurations can be appropriately changed. .

DESCRIPTION OF SYMBOLS 1 Light-emitting device 2 LED light source 3 Lens 4 Cover member 5 Cap member 6 Harness 7 Pipe 8 Color member 9 1st engagement mechanism 10 2nd engagement mechanism 21 LED apparatus 22 Board | substrate 23 Connector 31 Receiving hole 31a Flat surface 32 Projection surface 32a Flat surface 33 Abutting surface 34 Inclined surface 35 Lower end surface 41 Main body 42 Upper end surface 43 Insertion hole 44 Claw portion 44a Extension portion 44b Protrusion portion 45 Protrusion portion 46 Rib portion 51 Main body 52 Insertion hole 53 Concave groove 71 Hole portion 81 Projection

Claims (6)

An LED light source;
A lens on which light emitted from the LED light source is incident;
A cover member attached to the lens and covering the LED light source;
A first engagement mechanism for engaging the lens and the cover member, and making the cover member undetachable from the lens after engagement;
A cap member attached to the cover member and covering the cover member;
A light emitting device comprising: a second engagement mechanism that detachably engages the cover member and the cap member. The first engagement mechanism includes:
A protrusion provided on one of the lens and the cover member;
The light-emitting device according to claim 1, further comprising: a recess provided on the other of the lens and the cover member and engaged with the protrusion. The cover member has a main body formed in a cylindrical shape covering the LED light source, and a plurality of the protrusions formed on the inner peripheral surface of the main body.
The light-emitting device according to claim 2, wherein the lens includes a protruding portion disposed inside the main body, and a concave portion that is formed on a proximal end side of the protruding portion and can receive the plurality of protruding portions.   The light emitting device according to claim 3, wherein the cover member includes a rib portion that is formed on an inner peripheral surface of the main body and positions the LED light source. The LED light source has a substrate and an LED device mounted on the substrate,
The lens has a receiving hole for receiving the LED device at the tip of the protrusion,
The light emitting device according to claim 4, wherein the substrate is in contact with a tip of the protruding portion of the lens. The second engagement mechanism is
A claw provided on one of the cover member and the cap member;
The light emitting device according to claim 5, further comprising an engaged portion that is provided on the other of the cover member and the cap member and is detachable from the claw portion.

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