JP6600992B2 - lamp - Google Patents

Description

  The present invention relates to a lamp that includes a light emitting element such as an LED or an organic EL in a light source and can be mounted on an existing socket.

2. Description of the Related Art In recent years, light bulb-type LED lamps that can be used as a substitute for light bulbs have become widespread with the increase in output and cost of LEDs. In general, this type of LED lamp has an LED board on which an LED is mounted mounted on a flat disk, and a cylindrical body containing an electric circuit board such as a power circuit is connected to the back of the flat disk. In addition, a base is provided at the end of the body portion with an insulating portion interposed therebetween (see, for example, Patent Document 1 and Patent Document 2).
Usually, this type of LED lamp is provided with a glove that covers a flat disk.
As a structure for fixing the globe to the flat disk, a structure in which the peripheral edge of the globe is screwed to a side wall formed along the edge of the flat disk is common. Also known is a seal structure in which a stepped peripheral part for placing an O-ring as a seal member is formed on the side wall of a flat disk, and a seal such as an O-ring placed on the stepped peripheral part is pressed with a glove and sealed. (For example, see Patent Document 3).

JP 2010-010134 A JP 2009-206104 A JP 2011-54372 A

However, when a seal such as an O-ring is crushed and sealed with a glove, a load is applied due to the repulsive force of the packing, and the glove and the flat disk are deformed by a creep phenomenon, and this deformation may reduce the sealing performance. .
This invention is made | formed in view of the situation mentioned above, and aims at providing the lamp | ramp provided with the sealing member which can implement | achieve high sealing performance.

In order to achieve the above object, the present invention includes a substrate on which a light emitting element is mounted, a flat plate portion on which the substrate is mounted, a cylindrical portion that extends from the back surface of the flat plate portion and is provided with a base at the end, In the lamp provided with a globe covering the flat plate portion, the flat plate portion has a side wall on a peripheral edge, and the edge portion of the globe has a cylindrical shape facing the inside of the side wall of the flat plate portion, At least a portion is inserted and held in the side wall, and an annular seal member disposed between the glove and the side wall of the flat plate portion is attached to the outer peripheral surface of the edge of the glove, the cross-sectional shape of the sealing member, and a shape having an elongated shape of an elongated rectangular shape extending in the insertion direction of the globe, and a protrusion protruding toward both sides in the lateral direction from the long side direction both end portions of the elongated section The sealing member is formed of the glove. By inserting the portion, at least one convex portion at both longitudinal ends of the elongated shape portion is deformed in a direction opposite to the direction when the globe is inserted, and the elongated shape portion is an outer peripheral surface of the edge portion of the globe. It is sandwiched between the edge of the glove and the side wall of the flat plate in a state of being deformed so as to be closer to the side of the flat plate .

Moreover, this invention provides an insertion groove over the outer periphery of the said edge part inserted in the side wall of the said flat plate part of the said globe in the said lamp | ramp, The side wall of the said flat plate part, and the said insertion groove The seal member is disposed in a gap formed between the two.

  According to the present invention, a substrate on which a light emitting element is mounted, a flat plate portion on which the substrate is placed, a cylindrical portion that extends from the back surface of the flat plate portion and has a base at its end, and a globe that covers the flat plate portion The flat plate portion has a side wall on the periphery, and the globe is inserted and held at least partially inside the side wall of the flat plate portion, and the globe, the side wall of the flat plate portion, A seal member is disposed between the elongated shape portion of the elongated rectangular shape extending in the insertion direction of the glove and at least both ends of the elongated shape portion in the lateral direction. And a projecting portion protruding. Thereby, when changing a sealing member between a globe and a flat plate part and aiming at waterproofing, the direction of the load given to a globe and a flat plate part by the repulsive force of a seal member can be distributed. Therefore, it can suppress that a glove | globe and a flat plate part deform | transform by a creep phenomenon, and can implement | achieve high sealing performance.

It is a figure which shows the external appearance structure of the LED lamp which concerns on embodiment of this invention, (A) is a top view, (B) is a side view, (C) is a bottom view. It is a perspective view which decomposes | disassembles and shows an LED lamp. It is sectional drawing which shows the internal structure of a LED lamp. It is a top view of a base board. It is a figure which shows the attachment structure of a glove and a base board, (A) is a fragmentary sectional view of a base board, (B) is a side view of a glove. It is a figure which expands and shows the engaging part of a glove and a base board. It is a figure which shows the structure of a sealing member, (A) is a top view, (B) is AA sectional drawing of (A), (C) is the B section enlarged view of (B). It is a figure which shows the structure of a sealing member, (A) is the time of the attachment to a glove, (B) is a figure which shows the middle of attaching the glove to a base board, (C) is the state which attached the glove to the base board. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following embodiments, an LED lamp having an LED as a light source is exemplified as a lamp having a light emitting element as a light source. However, the present invention is not limited to this, and other light emission such as an organic EL, for example. The present invention can also be applied to a lamp having an element as a light source.

FIG. 1 is a diagram showing an external configuration of an LED lamp 1 according to the present embodiment, in which FIG. 1 (A) is a plan view, FIG. 1 (B) is a side view, and FIG. 1 (C) is a bottom view. FIG. 2 is an exploded perspective view showing the LED lamp 1. FIG. 3 is a cross-sectional view showing the internal configuration of the LED lamp 1.
As shown in these drawings, the LED lamp 1 is configured to have substantially the same shape and optical characteristics as an existing light bulb, and can be used as an alternative to the existing light bulb.

  That is, as shown in FIG. 1, the LED lamp 1 has a substantially cylindrical body portion 2 formed of a material having high thermal conductivity, and a light emitting portion is provided at a distal end 2 </ b> C (see FIG. 3) of the body portion 2. 12 is provided. A cylindrical insulating tube portion 10 made of an insulating material is provided at the end 2A of the body portion 2, and the base 3 is attached to the end 10A (FIG. 2) of the insulating tube portion 10. Has been. The base 3 is provided with a cylindrical shell 5 threaded into an existing socket (not shown, for example, E26 type socket) and an insulating portion 6 on the top of the end of the shell 5. The shell 5 and the eyelet 7 are configured to have a shape and size that can be attached to the socket. Thereby, the said LED lamp 1 can be mounted | worn with the socket of the lamp holder which mounts and uses the existing socket and the existing light bulb, and can use it as an alternative of the existing light bulb.

  The light emitting unit 12 includes a plurality of LEDs 15 as a light source. As shown in FIGS. 2 and 3, the electric circuit board 8 on which an electric circuit such as a driver circuit and a power circuit required for lighting the LEDs 15 is mounted It is stored inside the cylinder part 10. The power circuit of the electric circuit board 8 and the shell 5 and the eyelet 7 of the base 3 are electrically connected by lead wires 9A and 9B, respectively, and the power from the socket is electrically connected through the shell 5 and the eyelet 7. The power is supplied to the power circuit of the circuit board 8.

  The shell 5 and the body part 2 are electrically insulated by the insulating cylinder part 10, and even if the body part 2 is made of a conductive material in order to improve the heat dissipation of the body part 2, the shell of the base 3 5 and the body part 2 are configured to maintain good insulation. In this embodiment, while the trunk | drum 2 is formed from heat conductive resin, the insulating cylinder part 10 is formed from insulating resin, and the trunk | drum 2 and the insulating cylinder part 10 are insert-molded. The body part 2 and the insulating cylinder part 10 may be formed by two-color molding.

  By forming the body part 2 from a heat conductive resin, the LED lamp 1 can be lighter than when the base plate 13 and the body part 2 are formed of a metal material such as aluminum, and the LED lamp 1 can be used as an alternative to a light bulb. Even when the lamp is mounted on an existing socket or an existing lamp holder, there is no need to reinforce the existing socket or the existing lamp holder in order to support the weight of the LED lamp 1, and it can be used instead. . Moreover, since the number of later-described radiating fins 25 can be increased by reducing the weight, the surface area can be increased and the heat dissipation can be improved more efficiently.

As shown in FIG. 4, the insulating cylinder portion 10 is formed in a bottomed cylinder shape, and wiring holes 31 </ b> A and 31 </ b> B penetrating the terminal end 10 </ b> A are formed in the terminal end 10 </ b> A forming the bottom. An introduction hole 32 having a diameter increasing toward the body 2 side is formed on the surface of the wiring hole 31A, 31B on the body 2 side.
The lead wires 9A and 9B are connected to the end of the electric circuit board 8 on the base 3 side, and are connected to the shell 5 and the eyelet 7 through the wiring holes 31A and 31B, respectively. The lead wire 9 </ b> A drawn out from the wiring hole 31 </ b> A is bent outward at the terminal end 10 </ b> A of the insulating tube portion 10, extends along the outer surface of the insulating tube portion 10, and is connected to the shell 5. On the other hand, the lead wire 9B drawn out from the wiring hole 31B extends straight as it is and is connected to the eyelet 7. Further, when attaching the base 3 to the insulating cylinder portion 10, the shell 5 is caulked and fixed to the insulating cylinder portion 10 from the outer peripheral side in a state where the shell 5 is engaged with the terminal end 10 </ b> A of the insulating cylinder portion 10.

Next, the light emitting unit 12 of the LED lamp 1 will be described in detail.
As described above, the light emitting unit 12 is provided at the tip 2C on the opposite side of the base 3 in the body 2. The light emitting unit 12 includes a plate-like base plate 13, and an LED substrate 16 (described later) on which a plurality of LEDs 15 are mounted is provided on the upper surface of the base plate 13. The base plate 13 is a substantially disc-shaped member having a larger diameter than that of the body portion 2 when viewed from above, and the front end 2C of the body portion 2 is connected to the back surface. The base plate 13 and the body portion 2 are integrally formed from the same material, that is, a heat conductive resin material, and the base plate 13, the body portion 2, and the insulating cylinder portion 10 form the housing 35 of the LED lamp 1. Is configured.

FIG. 4 is a plan view of the base plate 13.
As shown in the figure, in the surface of the base plate 13, corresponding to the connection part of the body part 2, a substantially circular shape (in the body part 2 of the body part 2) for inserting the electric circuit board 8 into the body part 2. An insertion opening 14 having a diameter substantially the same as the inner diameter is formed. As shown in FIG. 3, the electric circuit board 8 has a length extending from the front end of the body portion 2 to the insulating cylinder portion 10 and has a front view shape that engages with the hollow shape of the body portion 2. Yes.

As shown in FIG. 3, the diameter R of the body portion 2 is formed to be approximately the same as the lateral width of the electric circuit board 8, and inside the body portion 2, as shown in FIG. A fixing groove 51A for sandwiching the edge of the electric circuit board 8 is provided on the terminal end 2A side, and an abutting piece 51B extending from the front end 2C side of the body part 2 to the terminal end 2A side is provided at a position facing the fixing groove 51A. Is provided.
When the electric circuit board 8 is inserted from the insertion opening 14, one edge of the electric circuit board 8 is sandwiched by the fixing groove 51A and the other opposite edge is abutted against the side surface of the abutting piece 51B. The electric circuit board 8 is fixed in the body part 2.
Further, as shown in FIG. 2, the upper end portion 8 </ b> C of the electric circuit board 8 is fixed by being pressed by an LED board 16 described later via a fixing bush 27. In addition, an insulating sheet 28 wound around the electric circuit board 8 is provided in the body part 2, and the insulating sheet 28 electrically connects the body part 2 and the electric circuit board 8. Insulated.

  As the LED 15, for example, an LED formed by packaging an LED element such as SMD or COB can be suitably used. In the present embodiment, a white LED is used as the LED 15. Needless to say, an LED having a light emitting color other than white may be used for the LED 15. As shown in FIG. 2, a plurality of LEDs 15 are arranged on the LED substrate 16 which is a disc-shaped circuit substrate.

  As shown in FIG. 2, the LED substrate 16 is fixed to the base plate 13 with screws, and a lead wire lead-out opening 17 is formed at the approximate center thereof. A power supply anode and cathode lead wires (not shown) are drawn from the electric circuit board 8 inserted into the body 2 through a lead wire lead-out opening 17 and formed on the upper surface of the LED board 16. It is electrically connected to the circuit pattern 80, and power is supplied to each LED 15 through the circuit pattern.

As shown in FIGS. 2 and 3, the base plate 13 has a tray shape having a side wall 19 along the periphery, and a globe 22 that covers the LED substrate 16 is attached to the inner peripheral surface of the side wall 19. . Although details will be described later between the globe 22 and the side wall 19, a seal member 26 is provided. As the globe 22 is inserted into the side wall 19, the seal member 26 is interposed between the globe 22 and the side wall 19. Sandwiched between. Thus, the waterproofness of the light emitting unit 12 is maintained by sandwiching the sealing member 26 between the globe 22 and the side wall 19.
Although not shown, the globe 22 is provided with the name of the LED lamp 1 on the inner surface by printing or engraving. Thereby, even if the LED lamp 1 is exposed to wind and rain, the name number does not disappear, and it does not disappear due to rubbing.

As shown in FIGS. 2 and 3, the light-emitting unit 12 includes an annular reflector 21 that reflects the light ray component Sa that is shielded from each LED 15 toward the side wall 19 and that is extracted from the globe 22 and can be used for illumination. Is provided. The annular reflector 21 is formed with a reflecting surface 21 </ b> A that is disposed along the circumference of the base plate 13 so as to surround each LED 15 and reflects the light ray component Sa incident from the LED 15 toward the globe 22. By providing such a reflector 21, the light use efficiency of the LED lamp 1 is improved, and the spread of light in the horizontal direction (direction parallel to the surface of the LED substrate 16) is suppressed.
Note that the reflecting surface 21A of the reflector 21 has a high reflection grade so that a high reflectance can be obtained so that the light ray component Sa shielded from each LED 15 toward the side wall 19 can be extracted from the globe 22 and used for illumination. Although the material is used, aluminum vapor deposition or the like may be used. Further, the cover may be provided with diffusibility by adding a diffusing material, applying a texture, or performing a surface treatment such as shot blasting.

As shown in FIGS. 2 and 3, an LED board heat dissipation sheet 20 having an area equivalent to or smaller than the LED board 16 is sandwiched between the LED board 16 and the base plate 13. Heat generation is efficiently guided from the LED substrate 16 to the base plate 13 through the LED substrate heat-dissipating sheet 20, and is radiated from the entire casing 35 including the base plate 13 to the outside air. In addition, it is good also as a structure which coat | covers resin which consists of an elastic material which has heat dissipation performance for required thickness on the back surface of LED board 16, and is integrated, without using the heat sink sheet 20 for LED boards. The insulation performance may be imparted to the coating on the back surface of the LED board heat radiation sheet 20 or the LED board 16.
That is, since both the base plate 13 and the body portion 2 are integrally formed from a material having high thermal conductivity, the thermal resistance between the base plate 13 and the body portion 2 is small and led to the base plate 13. Heat is transmitted to the body part 2 with less loss.

Further, a metal plate having high thermal conductivity such as copper or aluminum may be installed between the LED substrate 16 and the base plate 13 instead of the LED substrate heat dissipation sheet. The heat from the LED board 16 is efficiently transmitted to the base plate 13, and the metal plate works as a heat spreader to transmit the heat from the plurality of LEDs 15 to the entire base plate 13 and dissipate heat from the entire radiation fins 25 to increase the heat dissipation efficiency. Can be raised.
In addition, a metal plate can be formed larger than the LED board 16, and a metal plate can also be utilized as a heat sink. At this time, the peripheral portion of the metal plate may be bent to increase the heat radiation area.
Further, by forming the bent portion close to the inner peripheral surface of the globe, as will be described later, when the globe 22 contracts, the deformation of the globe 22 is suppressed by coming into contact with the bent portion and coming off from the base plate 13. Can be prevented.

  A large number of plate-like heat radiation fins 25 extending radially from the front end 2 </ b> C to the end end 2 </ b> A are erected on the outer peripheral surface of the body portion 2 centering on the axis of the body portion 2. The heat is radiated from each heat radiating fin 25. Each radiating fin 25 has a fin end 25 </ b> A connected to the back surface 13 </ b> A of the base plate 13, and the radiating fin 25, the body portion 2, and the base plate 13 are integrally formed. As a result, heat transmitted to the body portion 2 is radiated from the radiation fins 25 without loss, and heat is also transmitted directly from the base plate 13 to the radiation fins 25, so that the amount of heat transferred to the radiation fins 25 increases. High heat dissipation performance can be obtained.

  Further, as described above, the diameter R of the body portion 2 is formed to be small enough to accommodate the built-in electric circuit board 8 (about the width of the electric circuit board 8), so that the contact area between the LED board 16 and the base plate 13 is reduced. The amount of heat transfer between the LED substrate 16 and the base plate 13 can be increased. In addition to this, since the difference in diameter between the base plate 13 and the body portion 2 also increases, the fin end portion 25A of the radiating fin 25 has a length extending from the body portion 2 to the edge portion (side wall 19) of the base plate 13. The contact area between the fin end 25A and the back surface 13A is also increased, and more heat can be guided to the radiation fins 25 and dissipated.

  By the way, when the diameter R of the body part 2 is reduced to about the width of the electric circuit board 8, the electric circuit board 8 comes close to the body part 2, and an electrical connection between the body part 2 and the electric circuit board 8 occurs. Insulation performance deteriorates. Therefore, as described above, the body part 2 is provided with the insulating sheet 28 wound so as to surround the electric circuit board 8, thereby covering the entire inner surface of the body part 2 with the insulating sheet 28. It is supposed that the insulation performance between 8 and the trunk | drum 2 is improved. The insulating sheet 28 is formed by forming a single sheet having flexibility and insulation into a strip shape. When the insulating sheet 28 is attached to the body portion 2, the base sheet is wound in a cylindrical shape so that both ends of the sheet overlap each other. It is inserted from the insertion opening 14 of the plate 13. In the body part 2, the insulating sheet 28 expands by rewinding, and is mounted so as to cover the inner surface of the body part 2 by the rewinding force at this time. In this way, the insulating sheet 28 is formed in a band shape, inserted into the insertion opening 14 of the base plate 13 in a wound state, and mounted in the body part 2 by rewinding the insulating sheet 28, so that the body part 2 The insulating sheet 28 can be easily attached so as to cover the entire inner surface of the cover.

Next, a structure for attaching the globe 22 to the base plate 13 will be described.
As the mounting structure of the globe 22, a screwing structure that is screwed onto the base plate 13 is generally used. However, in the screwed structure, stress is always applied to both the globe 22 and the base plate 13. In such a state where stress is applied, there is a problem that stress due to thermal expansion / contraction is further applied and loosening due to deformation of the globe 22 and the base plate 13 occurs. Therefore, in the present embodiment, the structure for attaching the globe 22 is not a screwed structure, but an engagement structure of a protrusion and a groove, so that deformation due to the attachment of the globe 22 is suppressed.

FIG. 5A is a partial cross-sectional view of the base plate 13.
As shown in FIG. 5 (A), the side wall 19 of the base plate 13 is formed with a single stepped portion 200 on the inner peripheral surface over the entire circumference. The step portion 200 is formed thicker by projecting the lower end 19B side of the side wall 19 to the inner side than the upper end 19A side. The lower step peripheral surface 200A, which is the peripheral surface on the lower end 19B side of the step portion 200, is formed on the step portion 200. A plurality of guide holding grooves 201 are formed.
On the other hand, as shown in FIG. 5B, the globe 22 has an edge portion 22A extending vertically in a substantially cylindrical shape, and a plurality of protrusions 202 protruding outward are provided on the outer peripheral surface of the edge portion 22A. ing.

  The guide holding groove 201 includes an introduction groove 201A and a holding groove 201B. The introduction groove 201A is a groove for introducing the protrusion 202 of the globe 22 from the upper end 19A side, and is formed by providing a vertical groove on the lower peripheral surface 200A of the step portion 200. The holding groove 201B is a lateral groove having a length Lh that is continuous with the introduction groove 201A and extends along the circumferential direction Xs. When attaching the globe 22 to the base plate 13, the projection 202 of the globe 22 is introduced into the introduction groove 201 </ b> A of the guide holding groove 201 and is introduced into the guide holding groove 201, and the globe 22 is rotated so that the protrusion 202 is held in the holding groove. The projection 202 is engaged with the guide holding groove 201 and held along the guide 201B.

The rotation angle when the globe 22 is rotated by the guide of the holding groove 201B is set to about 30 degrees. When the glove 22 is rotated and attached to the base plate 13, the seal member 26 is rubbed by the side wall 19 of the base plate 13. As a result, the seal member 26 is kinked and distortion easily occurs. If the seal member 26 is kinked, a portion that is not in close contact with the globe 22 is generated, and the waterproof performance is deteriorated. According to the present embodiment, since the rotation amount when attaching the globe 22 is limited to the length Lh of the holding groove 201B in the circumferential direction Xs, distortion due to the rotation of the globe 22 of the seal member 26 is reduced and waterproofing is performed. Performance degradation can be prevented.
A flange 203 is formed on the edge 22 </ b> A of the globe 22. When the projection 202 of the globe 22 is guided by the guide holding groove 201 and pushed into the base plate 13, the flange 203 comes into contact with the upper end 19 </ b> A of the side wall 19 and cannot be pushed any further.

The guide holding groove 201 is provided with a return prevention protrusion 206. The return prevention protrusion 206 is located between the introduction groove 201A and the holding groove 201B, and is formed so as to gradually increase from the introduction groove 201A toward the holding groove 201B. When the globe 22 is rotated and the projection 202 is guided along the holding groove 201B, the projection 202 passes over the return prevention projection 206 and is received in the holding groove 201B when the globe 22 is bent.
When a force is applied in a direction opposite to the rotation direction when the globe 22 is attached, the rear end portion 202B of the protrusion 202 is configured to be caught by the return prevention protrusion 206.
According to this configuration, since the projection 202 is locked by the return prevention projection 206, the globe 22 does not easily come off after being attached to the base plate 13.

  If the globe 22 is deformed due to thermal expansion caused by lighting of the LED 15 and contraction caused by turning off the LED 15, there is a risk that the globe 22 may come off the base plate 13. In the present embodiment, as shown in FIG. 6, a groove that is one step lower than the in-plane of the base plate 13 is formed at the boundary with the side wall 19 of the base plate 13 so that the globe 22 is not deformed and detached from the base plate 13. A concave portion 223 is provided along the periphery. The globe 22 is configured such that the lower end 222 of the edge portion 22 </ b> A is disposed in the recess 223 while being attached to the base plate 13. When the globe 22 contracts after thermal expansion and the lower end 222 of the edge 22A hits the slope 224 of the recess 223, further deformation is suppressed. Thereby, it can prevent that the glove | globe 22 deform | transforms, so that the processus | protrusion 202 of the glove | globe 22 may remove | deviate from the guide holding groove 201, and it can prevent that the glove | globe 22 deform | transforms by thermal expansion and contraction and remove | deviates from the base board 13.

As shown in FIG. 6, a seal member 26 is provided between the globe 22 and the base plate 13 to prevent water from entering through a gap between them. The seal member 26 is attached to the outer peripheral surface of the edge 22 </ b> A of the globe 22.
The globe 22 is provided with a seal member engagement projection 204 below the flange 203 over the entire circumference of the edge 22A. The flange 203 and the seal member engagement protrusion 204 form a seal member fitting groove 205, and the seal member 26 is fitted into and attached to the seal member fitting groove 205 (see FIG. 8A).

  By the way, the housing 35 is integrally formed from a resin material, and the resin is pressed into a mold from a plurality of gates (three gates in the present embodiment), so that it is difficult to form a complete circular shape. For this reason, when it is going to ensure waterproofing with an O-ring, the amount of crushing of the O-ring may change at each part between the globe 22 and the base plate 13, and waterproofing may be difficult to ensure. Therefore, in order to ensure waterproofing using an O-ring, additional processing must be performed on the casing 35 after molding to increase dimensional accuracy, tight tolerances must be manufactured, and waterproofing must be achieved using caulking materials. did not become. Although it is conceivable to set the O-ring compression rate high to achieve waterproofing, since the repulsive force of the O-ring increases, there is a concern about deformation of the globe 22 and the base plate 13.

FIG. 7 is a view showing the structure of the seal member 26 of the present embodiment, FIG. 7A is a plan view of the seal member 26, and FIG. 7B is a cross-sectional view taken along line AA of FIG. FIG. 7C is an enlarged view of part B of FIG. 7B.
As shown in FIG. 7A, the seal member 26 is formed in an annular shape and has elasticity so that it can be attached to the outer peripheral surface of the globe 22. As shown in FIGS. 7B and 7C, the seal member 26 includes an elongated rectangular portion 26 </ b> A that extends in the insertion direction when the globe 22 is inserted into the base plate 13. The seal member 26 protrudes toward both the outer circumferential surface of the globe 22 and the inner circumferential surface of the side wall 19 of the base plate 13 from both ends in the longitudinal direction of the elongated portion 26A. Have That is, the sealing member 26 is formed in an I-shaped cross section having an elongated shape portion 26A and a convex portion 26B protruding in the short direction of the elongated shape portion 26A.

  In the present embodiment, the seal member 26 protrudes from both ends in the longitudinal direction of the elongated portion 26 </ b> A toward the outer peripheral surface of the globe 22 and the inner peripheral surface of the side wall 19 of the base plate 13. It was set as the structure formed in the cross-section I shape which has the convex part 26B to do. In addition, the convex part 26B should just be provided in the both ends of the longitudinal direction of the elongate shape part 26A at least, and may be provided in the approximate center of the elongate shape part 26A in the longitudinal direction with the both ends, You may provide many convex parts 26B in the shape of a pleat along the longitudinal direction of the elongate shape part 26A.

  When attaching the globe 22 to the base plate 13, as shown in FIG. 8A, the seal member 26 is attached to the seal member fitting groove 205. When attaching the globe 22 to the base plate 13, the convex portions 26 </ b> B and 26 </ b> B protruding toward the side wall 19 of the base plate 13 are pushed along the inner peripheral surface of the side wall 19. Thereby, as shown to FIG. 8 (B) and FIG.8 (C), convex part 26B, 26B deform | transforms toward the reverse direction to the insertion direction of the globe 22. As shown in FIG. At this time, the convex portions 26B and 26B are deformed in the direction indicated by the arrow Xb in FIG. 7C, and along with the deformation of the convex portions 26B and 26B, the elongated shape portion 26A is moved to the globe 22 side. That is, it is deformed in the direction indicated by the arrow Xc in FIG. As described above, the seal member 26 is deformed between the base plate 13 and the seal member insertion groove 205 and seals between the globe 22 and the base plate 13.

According to this configuration, the seal member 26 is deformed when the globe 22 is inserted into the base plate 13 to seal between the globe 22 and the base plate 13, so that the seal member 26 is crushed and sealed. Compared to the structure, the direction of the load applied to the globe 22 and the base plate 13 by the repulsive force of the seal member 26 can be dispersed in the other direction. Thereby, it is possible to prevent the globe 22 and the base plate 13 from being deformed by a creep phenomenon due to a repulsive force from the seal member 26.
In addition, since the seal member 26 has the I-shaped cross section, the seal member 26 can be shaped and stabilized. From the experiment, when the seal member 26 has, for example, a cross-sectional X shape or a shape having a convex portion 26B protruding in one direction from the elongated shape portion 26A toward the inner peripheral surface of the side wall 19 of the base plate 13, It has been found that when the seal member 26 is fitted into the seal member fitting groove 205 and mounted, the seal member 26 is twisted and is very difficult to mount. In the present embodiment, since the seal member 26 has an I-shaped cross section, twisting of the seal member 26 when the seal member 26 is fitted in the seal member fitting groove 205 can be reduced. 22 can be easily mounted.

  Further, the convex portions 26B and 26B are deformed in the direction of the arrow Xb, that is, in the direction opposite to the insertion direction of the globe 22, so that these convex portions 26B and 26B function as a valve body. This prevents air from entering the housing 35 from the outside through the gap between the globe 22 and the base plate 13 and allows the air inside the housing 35 to escape. When the LED 15 is lit, the air in the housing 35 is thermally expanded, and the inside of the housing 35 becomes positive pressure. The convex portions 26B and 26B function as valve bodies, and the air inside the housing 35 is It is configured to escape to the outside. On the other hand, when the LED 15 is turned off and the housing 35 cools, the inside of the housing 35 becomes negative pressure. When the inside of the housing 35 becomes negative pressure, air may enter the housing 35 from the outside through the gap between the globe 22 and the base plate 13. In the present embodiment, the convex portions 26B and 26B function as valve bodies (check valves), and even when the inside of the housing 35 has a negative pressure, air is supplied from the gap between the globe 22 and the base plate 13 to the housing. 35 does not enter from outside. Thereby, even when the inside of the housing | casing 35 becomes a negative pressure, it can prevent that water permeates with air from the clearance gap between the globe 22 and the base board 13. FIG.

  Further, on the lower surface of the flange 203 of the globe 22, when the projections 26 </ b> B and 26 </ b> B are deformed in the direction opposite to the insertion direction of the globe 22 by pushing the globe 22 into the base plate 13, A water stop groove 203A into which the portion 26B enters may be formed. The water stop groove 203 </ b> A is provided along the lower surface of the flange 203, and is formed along the gap between the globe 22 and the base plate 13 when the globe 22 is attached to the base plate 13. As described above, the convex portion 26 </ b> B is deformed and inserted into the water stop groove 203 </ b> A formed along the gap between the globe 22 and the base plate 13. The gap between them can be surely stopped.

As described above, according to the LED lamp 1 of the present embodiment, the LED substrate 16 on which the LED 15 (light emitting element) is mounted, the base plate 13 (flat plate portion) on which the LED substrate 16 is placed, and the base plate 13. In the lamp 1 including the insulating cylinder portion 10 (cylindrical portion) extending from the rear surface 13A of the base plate and having the base 3 provided at the terminal end 10A, and the globe 22 covering the base plate 13, the base plate 13 has a side wall 19 on the periphery. The globe 22 is held by inserting at least a part (the edge 22A in the present embodiment) inside the side wall 19 of the base plate 13, and between the globe 22 and the side wall 19 of the base plate 13. The seal member 26 is disposed, and the cross-sectional shape of the seal member 26 is an elongated rectangular portion 26A extending in the insertion direction of the globe 22 and at least both ends in the longitudinal direction of the elongated portion 26A. And the convex portion 26B projecting toward the lateral direction, and a shape having a.
According to this configuration, the sealing member 26 can be deformed between the globe 22 and the base plate 13 to achieve waterproofing. Further, the direction of the load applied to the globe 22 and the base plate 13 by the repulsive force when the seal member 26 is deformed can be dispersed by the cross-sectional shape of the seal member 26. Therefore, it is possible to suppress the deformation of the globe 22 and the base plate 13 due to the creep phenomenon due to the repulsive force from the seal member 26, and to realize high sealing performance.

Further, according to the LED lamp 1 of the present embodiment, the seal member fitting groove 205 is provided on the outer peripheral surface of the portion inserted into the side wall 19 of the base plate 13 of the globe 22 over the entire circumference. The seal member 26 is disposed in a gap formed between the side wall 19 and the seal member fitting groove 205. According to this configuration, even if the globe 22 moves upward with respect to the base plate 13, there is a large change in the gap between the seal member fitting groove 205 of the edge 22 </ b> A of the globe 22 and the side wall 19 of the base plate 13. Since the pressing force of the sealing member 26 is maintained, the sealing performance is not weakened.
Further, the repulsive force by the seal member 26 acts between the seal member insertion groove 205 of the edge portion 22 </ b> A of the globe 22 and the side wall 19 of the base plate 13 to push up the flange 203 of the globe 22 from the step portion 200 of the side wall 19. Since it does not act in the direction, it is possible to prevent the repulsive force of the seal member 26 from being damaged due to the load of the protrusion 202 and to prevent the glove 22 from being detached from the base plate 13.

  Further, according to the LED lamp 1 of the present embodiment, the seal member 26 is mounted in the seal member insertion groove 205, and along the side wall 19 when the globe 22 is inserted inside the side wall 19 of the base plate 13. It was set as the structure which deform | transforms. According to this structure, as for the sealing member 26, convex part 26B, 26B deform | transforms toward the reverse direction to the insertion direction of the globe 22, and these convex part 26B, 26B functions as a valve body. Thereby, when the air in the housing 35 is thermally expanded and the inside of the housing 35 becomes positive pressure, the convex portions 26B and 26B function as a valve body, and the air inside the housing 35 is transferred to the outside. Can escape. Further, when the air in the housing 35 is cooled and contracts, and the inside of the housing 35 becomes negative pressure, the convex portions 26B and 26B function as check valves, and the globe 22 and the base plate 13 Air does not enter the housing 35 from the outside through the gap. Thereby, even when the inside of the housing | casing 35 becomes a negative pressure, it can prevent that water permeates with air from the clearance gap between the globe 22 and the base board 13. FIG.

  The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 LED lamp 2 Body part 3 Base 8 Electric circuit board 10 Insulating cylinder part 12 Light emission part 13 Base board (flat plate part)
15 LED (light emitting element)
16 LED substrate 19 Side wall 19A Upper end 19B Lower end 22 Globe 22A Edge portion 26 Seal member 26A Elongate shape portion 26B Protrusion portion 35 Housing 203 Flange 204 Seal member engagement protrusion 205 Seal member insertion groove (insertion groove)

Claims (2)

In a lamp comprising: a substrate on which a light emitting element is mounted; a flat plate portion on which the substrate is placed; a cylindrical portion that extends from the back surface of the flat plate portion and has a base at its end; and a globe that covers the flat plate portion ,
The flat plate portion has a side wall at the periphery,
The edge of the globe has a cylindrical shape facing the inside of the side wall of the flat plate portion, and at least a part of the edge is inserted and held in the side wall,
An annular sealing member disposed between the globe and the side wall of the flat plate portion is attached to the outer peripheral surface of the edge of the globe,
Shape having a cross-sectional shape of the sealing member, and the elongated portion of the elongated rectangular shape extending in the insertion direction of the globe, and a protrusion protruding toward both sides in the lateral direction from the long side direction both end portions of the elongated section and,
The sealing member is
Due to the insertion of the edge of the globe, at least one convex portion at both ends in the longitudinal direction of the elongated shape portion is deformed in a direction opposite to the direction when the globe is inserted, and the elongated shape portion is the edge of the globe. In a state of being deformed so as to approach the outer peripheral surface side of the part,
A lamp characterized by being sandwiched between an edge portion of the globe and a side wall of the flat plate portion . In the outer peripheral surface of the edge portion inserted into the side wall of the flat plate portion of the globe, a fitting groove is provided over the entire circumference, and in a gap formed between the side wall of the flat plate portion and the fitting groove. The lamp according to claim 1, wherein the seal member is arranged.

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