JP5538609B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device using an LED element as a light source, and more particularly to a ceiling-mounted LED lighting device directly attached to a ceiling.

2. Description of the Related Art In recent years, due to an increase in environmental awareness, a light bulb type LED lamp with a built-in power source using an LED element excellent in power saving as a light source has been widely used. More recently, lighting devices using LED elements have also been developed and introduced into the market for ceiling-mounted downlights and ceiling-mounted ceiling lights.
The ceiling-embedded downlight is for making a large hole in the ceiling surface, and it is necessary to reinforce the hole and reinforce the hole, which takes time during construction. Then, the illuminating device which does not open a big hole is examined (patent document 1, 2).
In addition, the ceiling-mounted ceiling light is a device in which a lighting device having a hook ceiling adapter is attached to a hook ceiling body attached to the ceiling surface. Recently, a ceiling light with a small thickness has been studied (patent document). 3).

For example, in the illumination device described in Patent Document 1, a base plate to which a power feeding unit, an LED, and a lighting device on the same plane as the LED are attached is directly screwed to a ceiling surface with an attachment screw. An insertion hole into which a cylindrical power feeding part is inserted is formed on the surface, and a power supply power line is connected to the power feeding part inserted into the insertion hole. Accordingly, an illumination device that can be directly attached to the ceiling surface without providing a large hole in the ceiling surface is provided.
In addition, the lighting device described in Patent Document 2 includes a light source and a power block that supplies power to the light source, and a speed at which an external electric wire is electrically connected to the interior of the fixture body attached to the ceiling surface. Provided is a lighting fixture that includes a connection terminal and has improved workability while being thin.

  The illumination device described in Patent Document 3 includes an illumination module, a power supply unit that supplies power to the illumination module, a chassis that holds the illumination module and the power supply unit, and a hooking ceiling adapter that attaches the chassis to the hooking ceiling body. The lighting module, the power supply unit, and the hooking ceiling adapter are arranged on the chassis so as not to overlap each other with respect to the hooking sealing body. As a result, the protruding heights of the lighting module, the power supply unit, and the hooking ceiling adapter from the hooking ceiling body can be reduced, and a lighting device that is reduced in thickness is provided.

Japanese Patent No. 4565307 JP2011-233272A JP2011-134684A

  However, the lighting devices described in Patent Literature 1 to Patent Literature 3 are not only inferior in workability to the ceiling or the like, but in the lighting device described in Patent Literature 1, LED elements and electronic components are generated. Although no heat dissipation measures have been taken, the lighting device described in Patent Document 2 has a heat sink disposed on the upper surface of the light source, but the number of parts increases and the heat of the heat sink is There is a problem that it cannot be efficiently diffused outside the main body. Moreover, since the lighting fixture described in Patent Document 3 only dissipates heat generated by the power supply unit or the like from the lattice holes of the center cover to the outside of the lighting device, the heat dissipation effect is insufficient. There is.

  The present invention has been proposed in order to solve the above-described problems, and provides an LED lighting device with excellent workability for mounting on a ceiling surface and the like, and with a small number of components, LED elements, electronic components, and the like. An object of the present invention is to provide an LED lighting device that can efficiently dissipate heat generated from the outside.

In order to solve the above-mentioned problem, in the invention according to claim 1, a lighting circuit on which an LED board on which an LED element is mounted and an electronic component that constitutes a lighting circuit for lighting the LED element is mounted. An LED lamp body that houses a substrate in a housing;
A connecting plate fixed to the attached portion and detachably attached to the LED lamp,
The connecting plate is formed by processing a single sheet metal and has a power supply opening through which an external power supply line drawn out from a through hole of an external power supply wire formed in the attached portion is inserted. And
The connecting plate and the LED lamp body are detachably mounted by a locking means for rotating and fixing the LED lamp body with respect to the connecting plate,
The housing has thermal conductivity,
The board | substrate of the area | region where the said LED element is mounted is contacting at least one part of the inner wall of the said housing | casing.

The invention according to claim 2 is characterized in that the connecting plate is fitted in the outer peripheral edge of the upper surface of the LED lamp body in a state of being mounted on the LED lamp body. LED lighting apparatus of description.

  The invention according to claim 3 is characterized in that a convex portion is formed on the housing side of the substrate of the housing, and a substrate in a region where the LED element is mounted contacts the convex portion. .

Moreover, in the invention which concerns on Claim 4, the said LED element and the electronic component which comprises the said lighting circuit are mounted on the same board | substrate, and the back surface part of the area | region where the said LED element is mounted is the said part. A back surface of a substrate in a region where an electronic component constituting the lighting circuit is mounted is spaced apart from an inner wall of the housing of the LED lamp body .

  Moreover, in the invention which concerns on Claim 5, the thermal radiation surface is formed in the back surface part of the said board | substrate corresponding to the mounting area | region of the said LED element, and the mounting area | region of the electronic component which comprises the said lighting circuit, The heat radiation surface of the area where the LED element is mounted is in contact with the convex portion of the housing.

  In the invention according to claim 6, in the space formed by separating the back surface of the substrate in the area where the electronic components constituting the lighting circuit are mounted and the inner wall of the casing of the LED lamp body. An electrically insulating heat radiating resin or a heat radiating sheet is provided.

  The invention according to claim 7 is characterized in that the connecting plate is a heat conductive material.

According to the invention of claims 1 to 7, efficiency with the LED lighting device is improved attachment workability in attaching the ceiling surface or the like, a small number of components, the heat generated from the LED devices and electronic parts, etc. The effect that it can dissipate outside is obtained.

The external perspective view before attachment seen from the ceiling surface side of the LED lighting device according to the present embodiment The external perspective view before attachment seen from the irradiated surface side of the LED lighting device according to the present embodiment External appearance perspective view seen from the ceiling surface side of the LED lighting device according to the present embodiment The external appearance perspective view seen from the to-be-irradiated surface side of the LED lighting apparatus concerning this embodiment External perspective view of the connecting plate according to the present embodiment viewed from the ceiling surface side External perspective view of the connecting plate according to this embodiment as seen from the irradiated surface side The front view seen from the ceiling surface side of the connection board concerning this embodiment Side view of the connecting plate according to the present embodiment as viewed from the direction of FIG. 7X. FIG. 7Y-Y cross-sectional view of the connecting plate according to the present embodiment. External perspective view of the LED lamp according to this embodiment as seen from the ceiling surface side External perspective view of the LED lamp according to this embodiment viewed from the irradiated surface side The front view which looked at the LED lamp concerning this embodiment from the ceiling surface side FIG. 12X-X sectional view of the LED lamp according to the present embodiment. 12Y-Y sectional view of the LED lamp according to this embodiment. 13 is an enlarged view of the vicinity of the quick connection terminal storage portion in FIG. 13 according to the present embodiment. External perspective view of quick connection terminal according to this embodiment External perspective view of the quick connection terminal storage according to the present embodiment The front view which looked at the quick connection terminal storage part concerning this embodiment from the ceiling surface side 18X-X sectional view of the quick connection terminal storage portion according to the present embodiment. The exploded perspective view which looked at the LED lamp concerning this embodiment from the upper part The exploded perspective view which looked at the LED lamp concerning this embodiment from the lower side (a LED element and electronic parts are omitted) Mounting surface side front view of substrate according to this embodiment Front side view of back side of substrate according to this embodiment Mounting surface side front view of another form of the substrate according to this embodiment The back side front view of another form of the board concerning this embodiment External perspective view of the shielding plate according to this embodiment viewed from the ceiling side External perspective view of the shielding plate according to the present embodiment viewed from the irradiated surface side Enlarged sectional view of the vicinity of the light guide plate according to this embodiment

  Preferred embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example, and the present invention is not limited to this.

  As shown in FIGS. 1 to 4, the LED lighting device 100 according to the present embodiment includes a connecting plate 1 and an LED lamp body 2, and a diameter of 15 mm from which an external power line (F-cable) 3 comes out. The connecting plate 1 is screwed to the ceiling surface 4 having the through holes 4a, and the LED lamp body 2 is detachably attached to the connecting plate 1. When the LED lamp body 2 is mounted on the connecting plate 1, the LED lamp body 2 and the external power supply line 3 are connected, and the LED lighting device 100 can be used as a downlight. In addition, if it is the through-hole 4a of diameter 15mm or less, since a special reinforcement is not given to a ceiling, an LED lighting apparatus can be attached with sufficient workability.

  The connecting plate 1 is made by punching, pressing, or bending using a stainless steel plate. As shown in FIGS. 5 to 9, the connecting plate 1 has a circular shape, and a circular connecting plate power supply unit 11 is opened at the center, and a pair of connecting plate positions are fixedly extended from the edge of the opening. A protruding portion 12 and a pair of rotation restricting hole portions 13 are formed.

The connecting plate position fixed extending portion 12 protrudes toward the ceiling surface 4 in parallel with the rotation axis of the connecting plate 1 and has an outer wall of a virtual cylinder having the same center as the connecting plate 1 and a diameter of 14 mm, an outer wall thickness of 1 mm and a height of 15 mm. These are two extended pieces extended from arcs of a predetermined length facing each other. Positioning when the connecting plate 1 is inserted into the through hole 4a is facilitated by the two connecting plate position fixing extension portions 12, and the connecting plate 1 can be easily attached to the ceiling surface 4.
Furthermore, a pair of rotation restricting hole portions 13 opened in a fan shape are opened from the arc of the virtual cylinder where the connecting plate position fixing extension portion 12 is not provided, and the connecting plate power supply portions 11 and 1 are opened. The pair of rotation restricting hole portions 13 form a communicating ribbon type (opening shape) through hole.

The connecting plate 1 is provided with a rotation engaging portion 14 that rotates and engages with the LED lamp body 2. The rotation engaging portion 14 includes a rotation locking piece insertion opening 14-1 and a locking tongue piece 14-2, and the rotation locking piece insertion opening 14-1 is a substantially fan-shaped opening. Thus, four locations are provided at intervals of 90 degrees.
The locking tongue piece 14-2 is smaller than the opening of the rotation locking piece insertion opening 14-1, is formed in a similar shape to the opening, and is a surface that joins the LED lamp body 2 of the connecting plate 1. On the side (lower surface side), it is installed on one end side of the peripheral edge in the radial direction of the opening so as to face the rotation locking piece insertion opening 14-1. A claw 14-3 is formed at the tip of the locking tongue piece 14-2 to prevent the rotational engagement from being released.

  As shown in FIGS. 20, 21, and 13, the LED lamp main body 2 includes a housing 21, a quick connection terminal 22 to which an external power line housed in the housing 21 is connected, and a quick connection terminal 22. A board 26 on which a quick-connection terminal storage portion 23 for storing the LED, a plurality of LED elements 24, and various electronic components 25 constituting a lighting circuit for lighting the LED elements 24 are mounted, and a shielding plate 27 covering the electronic components 25. And a translucent cover 28 that covers the opening of the housing 21.

The housing | casing 21 is formed in the flat shape with a low height with the hollow bottomed cylinder which one end surface opened using aluminum, as shown in FIGS.
On the upper surface 21-1 of the housing 21 joined to the connecting plate 1, a concave portion 21-2 that is recessed in a circular shape toward the inside of the housing 21 is formed so that the locking tongue piece 14-2 of the connecting plate 1 can enter. Further, an extension portion 21-10 having the same height as the thickness of the connecting plate 1 is formed from the outer peripheral edge of the upper surface 21-1, and when the LED lamp main body 2 is attached to the connecting plate 1, it is integrated. It becomes the structure which becomes.

  A cylindrical LED lamp power supply opening 21-3 opened in a rectangular shape is erected at the center of the recess 21-2 of the housing 21. Further, a cylindrical LED lamp position fixing extension portion 21-4 having an outer diameter of 14 mm and extending toward the connecting plate 1 is formed at the peripheral edge portion of the LED lamp power supply opening portion 21-3.

  Furthermore, the outer wall of the LED lamp position fixing extension portion 21-4 has a depth of 1 mm at which the connecting plate position fixing extension portion 12 engages, and an engagement groove 21-5 along the cylindrical side wall 1 (In this embodiment, the thick portion of the cylindrical LED lamp power supply opening 21-3 is the LED lamp position fixing extension portion 21-4, and the thin portion is the engagement groove 21-5. ) A small piece-like rotation restricting projection 21-6 is formed integrally with the LED lamp position fixing extension 21-4 on the upper surface of the recess 21-2. The inside of the rotation restricting projection 21-6 is hollow to accommodate a quick connection terminal accommodating portion 23 described later.

  The rotation restricting projection 21-6 is inserted into the turn restricting hole 13 of the connecting plate 1, and the turning range of the LED lamp body 2 is determined by the expansion angle of the fan-shaped turn restricting hole 13. . The groove width of the engaging groove 21-5 is also formed wider than the width of the connecting plate position fixing extension portion 12 corresponding to the pivotable angle.

  Depending on the structure and dimensions of these various members, the engaging body formed when the connecting plate position fixing extension portion 12 and the LED lamp position fixing extension portion 21-4 are engaged with each other has an outer diameter in a thin state. It is structured to fit in a 14 mm cylindrical space. Thereby, even though the connecting plate 1 is interposed, the flat LED lighting device 100 can be realized, and the opening of each power supply unit can be easily opened with respect to the hole provided in the ceiling surface 4. It has a structure where the surfaces are matched and easy to install.

  A plurality of trapezoidal rotation locking pieces 21-7 extending toward the center of the LED lamp body 2 are provided on the upper surface 21-1 of the casing 21 in the vicinity of the stepped portion of the recess 21-2 of the LED lamp body 1. Is formed. The rotation locking piece 21-7 is formed in a size that can be inserted into the rotation locking piece insertion opening 14-1 of the connecting plate 1. The rotation locking piece 21-7 is inserted into the rotation locking piece insertion opening 14-1 of the connection plate 1, and the upper surface 21-1 of the housing 21 and one end surface side (lower surface side) of the connection plate 1 are arranged. After being joined, it is turned and inserted into the upper surface of the locking tongue piece 14-2.

  Since the claw 14-3 is formed at the tip of the locking tongue piece 14-2, it can be seen that the mounting of the LED lamp body 2 is completed. Further, as described above, the rotation after the fitting is restricted by the claw 14-3 so that it cannot be removed carelessly. However, the fall prevention chain that connects the connecting plate 1 and the LED lamp body 2 A lock structure for restricting and releasing the rotation may be separately provided.

  The quick connection terminal 22 is formed in an L shape by processing a metal plate, and includes a quick connection terminal portion 22-1 into which an external power source is inserted at one end as shown in FIG. A contact 22-2 is integrally provided on the end side. The quick connection terminal portion 22-1 has the same structure as a known quick connection terminal used in a power supply terminal block or the like, and a core wire of an external power supply line is inserted therein. The contact 22-2 is a leaf spring that is pressed against and contacts the power input surface of the substrate 26. The external power line 3 and the substrate 26 are electrically connected by the quick connection terminal 22. Is done.

  The quick connection terminal accommodating portion 23 is formed of an electrically insulating resin, and as shown in FIGS. 17 to 19, is T-shaped and has an opening portion 23-1 into which the external power supply line 3 is inserted. The two quick connection terminal portions 22-1 of the quick connection terminal 22 are accommodated in the hollow cylindrical T-shaped vertical cylinder portion 23-2 provided and are in contact with the T-shaped horizontal frame portion 23-3. The child 22-2 is accommodated. The shape of the opening of the vertical cylinder portion 23-2 is a long rectangular shape, and an insulating plate 23-4 is provided at the center of the inside, and is divided into two having an electric wire insertion hole 23-5 inside the cylinder. The accommodation space 23-6 is provided. Two quick connection terminals 22 are arranged apart from the accommodation space 23-6, and the insulating plate 23-4 provided at the center extends to the opening 23-1, so that the creepage distance is large. Therefore, sufficient insulation is ensured between the two core wires of the external power supply line and the two quick connection terminals.

  The quick connection terminal storage portion 23 storing the quick connection terminals 22 is inserted from the inside of the housing 21, and the T-shaped vertical cylinder portion 23-2 is inside the LED lamp position fixing extension portion 21-4 of the housing 21. The T-shaped horizontal frame portion 23-3 is stored in the space, and is stored in the internal space of the rotation restricting projection 21-6.

  In this embodiment, the quick connection terminal for directly attaching the core wire of the external power supply line is used. However, a plug having an outer diameter of 14 mm is attached to the core wire of the external power supply wire, and the plug is inserted into the LED lamp body 2. A connector may be housed. Further, a contact that is pressed against and contacted with the power input surface of the substrate 26 may be provided on the other end side of the connector on the plug insertion side, similarly to the above-described quick connection terminal 22.

Moreover, in this embodiment, although the quick connection terminal 22 was accommodated in the LED lamp main body 2, it is not limited to this, You may attach the quick connection terminal 22 to the connection board electric power supply part 11 of the connection board 1, and also quick connection. The terminal portion 22-1 and the contact 22-2 are divided, the quick connection terminal portion 22-1 is attached to the connecting plate 1, the contact 22-2 is attached to the LED lamp body 2, and the LED lamp body 2 is attached to the connecting plate 1. The quick connection terminal portion 22-1 and the contact 22-2 may be connected to form an integrated quick connection terminal.
Further, a power supply line connected to the lighting circuit may be extended from the LED lamp main body 2, a plug / socket may be attached to the tip of the power supply line, and the power supply line may be inserted into the socket / plug of the external power supply line.

  Various known LEDs can be used as the LED element 24. In this embodiment, a high-luminance type LED element that emits white light for illumination is used. The electronic component 25 constituting the lighting circuit is a known electronic component such as various diodes, capacitors, ICs, resistors for performing overcurrent protection, noise cut, rectification, smoothing, dimming control, and the like.

The said board | substrate 26 is a glass epoxy board | substrate with which copper foil was affixed on both surfaces, and the LED element 24 and the electronic component 25 are mounted in the single side | surface.
FIG. 22 is the mounting surface side (front side) of the substrate 26, a circular mounting area A on the center side of the substrate 26, and a belt-like semi-annular shape (approximately 3/4 round) outside the mounting area A Mounting region B is formed. The LED element 24 is mounted in the mounting area A, and the electronic component 25 is mounted in the mounting area B. Further, a through hole 26-1 is provided in a part of the mounting region B, and a large electrolytic capacitor is installed sideways as compared with other electronic components.

Between the mounting area A and the mounting area B, the copper foil is removed leaving a portion where current flows, and an annular area C (high thermal resistance area having a small thermal conductivity coefficient) having a higher thermal resistance than the mounting areas on both sides, and It has become. The width of the annular region C is formed larger than the thickness of the substrate 26, and the heat generated in the LED element 24 reaches the substrate back surface earlier than the mounting region B.
In addition, you may form the slit which cut off the board | substrate of the annular | circular shaped area | region C and penetrated. As a result, the thermal resistance of the annular region C can be further increased.

FIG. 23 is a back surface side of the substrate 26, and a copper foil having substantially the same shape as the mounting regions A and B is attached to the back surface of the substrate corresponding to the mounting regions on the front side. The concave portion 21-2 of the housing 21 is formed with a circular convex portion (21-8 shown in FIG. 21) inside as viewed from the rear surface direction of the housing 21, and an annular concave portion around the convex portion. (21-9 shown in FIG. 21) is formed. The copper foil affixed to the back surface position corresponding to the mounting area A is in contact with the inner wall of the casing 21 forming the convex portion 21-8, and the heat generated in the LED element 24 is generated by the electronic component 25. Without being conducted, the heat is conducted to the housing 21 through the copper foil on the back surface of the substrate, and is radiated from the upper surface and the side surface forming the outer wall of the housing 21.
In addition, heat dissipation can be further improved by applying an electrically insulating heat dissipating grease or sandwiching a sheet to the contact portion.

  The copper foil affixed to the back surface position corresponding to the mounting region B is located in the annular recess 21-9 and does not directly contact the housing 21. Through holes are formed in the mounting area B, and the leads of some electronic components 25 are exposed on the back surface of the substrate. However, since the mounting area B is located in the recess 21-9, the leads and metal Short circuit is prevented without contact with the casing 21.

Between the mounting area | region B and the said annular | circular shaped recessed part 21-9, you may be filled with an electrically insulating curable thermal radiation resin. Thereby, the heat generated in the electronic component 25 is easily transferred to the casing 21 through the copper foil on the back surface, and the temperature rise of the electronic component 25 is suppressed. Further, since the heat conductivity of the aluminum casing is about 100 times larger than the heat conductivity of the heat radiation resin, the heat generated in the LED element 24 does not flow back to the electronic component 25, and the LED element. 4 and the electronic component 25 are effectively radiated from the outer wall of the casing 21.
Moreover, even if some impact is applied to the LED lamp main body 2 by the cured resin, the lead does not contact the inner wall of the housing 21, so that the resin filling also improves the reliability.

Further, on the back surface of the substrate 26, a power input surface 26-2 that contacts the contact 22-2 of the quick connection terminal 22 is provided. The power input surface 26-2 is a copper foil, is provided at a back surface position corresponding to the mounting region A, and a power supply path 26-3 for supplying power to the mounting region B from the power input surface 26-2. Is provided. The power input surface 26-2 and the power supply path 26-3 are separated from the copper foil provided at the back surface position corresponding to the mounting area A, and the power supply path 26-3 is the above-mentioned of the casing 21. A groove (not shown) is formed in a part of the convex portion 21-8 so as not to contact the inner wall of the convex portion. The power supply path 26-3 extends to the back surface of the mounting region B, and the power reaches the power supply unit 26-4 in the mounting region B through the through hole.
If the above-described electrically insulating heat radiation sheet is provided on the surface of the convex portion 21-8, it is not necessary to provide a groove for the power supply path 26-3, and there is no need for alignment, which is preferable in manufacturing. .

On the other hand, the shape of the copper foil of the substrate 26 is formed as shown in FIG. 24 and FIG. -1 may be provided. Thereby, the temperature rise of the LED element 24 is further suppressed.
Further, the T-shaped horizontal frame portion 23-3 and the contact 22-2 of the quick-connection terminal accommodating portion 23 may be elongated and the power input surface 26-2 may be provided at the back surface position corresponding to the mounting region B.

In the present embodiment, the LED element 24 is mounted in the mounting area A and the electronic component 25 is mounted in the mounting area B. On the contrary, the electronic component 25 is mounted in the mounting area A and the mounting area B is mounted. The LED element 24 may be mounted. Accordingly, the inner wall of the upper surface 21-1 of the housing 21 is formed with a circular concave portion at the center and an annular convex portion around it.
In addition, the LED element mounting board and the lighting circuit board are separated from each other, and the lighting circuit board is not disposed on the optical axis of the LED element so that both boards are positioned on substantially the same plane. The LED lamp body can be made flat.

  In this way, the LED lamp main body and the substrate structure of the present invention provide a long-life LED lighting device that is flat but suppresses the temperature rise of the electronic components constituting each LED element and lighting circuit. can do.

The shielding plate 27 is made of a morning glory-shaped curved surface having both ends opened using a polycarbonate resin containing titanium oxide and not transmitting light, and is formed into a hollow cylinder. A ring portion 27-1 having an enlarged diameter is provided on the inner side from the periphery of the opened one end surface (upper end surface). The upper end surface of the ring portion 27-1 is joined to the annular region C between the mounting region A and the mounting region B of the substrate 26, and the substrate 26 is sandwiched between the upper surface 21-1 of the housing 21. The upper surface 21-1 is screwed (FIG. 13).
The other end surface (lower end surface) where the shielding plate 27 is opened is formed with a flange portion 27-2 that is greatly enlarged outward. The flange portion 27-2 covers and hides the mounting region B so that the electronic component 25 cannot be seen from the outside, and the outermost end portion of the flange portion 27-2 is in contact with the inner periphery of the housing 21 (FIG. 13). , FIG. 28).
The inner wall surface 27-3 of the shielding plate 27 forms a mirror-diffused diffuse reflection surface, which reflects the light emitted from the LED element 24 without absorbing it and emits the light from the LED lamp 2 without losing light. It has a function to make it.

  The translucent cover 28 is molded into a circular dome shape using polycarbonate. As shown in FIG. 28, an extended portion 28-1 is provided at the end of the translucent cover 28 toward the opposite side of the light irradiation direction, and the edge of the flange portion 27-2 of the shielding plate 27. And is fixed in contact with the inner wall of the housing 21.

  A space is formed between the extending portion 28-1 and the shielding plate 27, and the light reflected by the translucent cover 28 is diffusely reflected by the inner wall surface 27-3 of the shielding plate 27, and this is repeated. Thus, the light reaches the end side of the translucent cover 28. As a result, the entire surface of the translucent cover 28 including the portion covering the shielding plate 27 can be illuminated.

Further, an acrylic annular light guide plate 29 may be inserted between the shielding plate 27 and the translucent cover 28. As shown in FIG. 28, the inner peripheral side end surface of the light guide plate 29 forms a light introducing surface 29-1, and the surface located on the shielding plate side is a light emitting surface 29-2, and the scattered light is transmitted through. It is emitted toward the sex cover. Thereby, the irradiation light from the part which covers the shielding board 27 can be increased further, and a translucent cover can be made to shine more uniformly.
When the LED element is arranged on the outer peripheral side of the substrate 26 such that the LED element 24 is mounted in the mounting region B, a light introduction surface is provided on the outer peripheral side of the disc-shaped light guide plate, and the disc-shaped entire surface is provided. By installing the light guide plate with the light exit surface between the shielding plate 27 and the translucent cover 28, the LED illumination device 100 in which the entire translucent cover emits light uniformly is obtained.

  Thus, by providing the shielding plate 27 and the light guide plate 29, it is possible to provide an LED illumination device without uneven brightness.

The LED lighting device 100 of this embodiment is attached to the ceiling surface 4 or a wall, which is a surface to be attached, as follows.
First, a through hole 4a having a diameter of 15 mm is formed in the ceiling surface 4, and the external power supply line 3 is pulled out from the through hole 4a. Next, the connecting plate position fixing extension portion 12 of the connecting plate 1 is inserted into the through hole 4a, and at the same time, the external power line 3 is pulled out from the connecting plate power supply portion 11, and the connecting plate 1 is screwed to the ceiling surface 4. To do. Thereafter, the two core wires of the external power supply line are inserted from the opening 23-1 of the quick connection terminal storage portion 23 of the LED lamp body 2, and are inserted into the quick connection terminal portion 22-1.

Next, the LED lamp body 2 is mounted on the connecting plate 1. That is, the position fixing extension portion 21-4 of the LED lamp body 2 is inserted into the position fixing extension portion 12 of the connecting plate 1, and the engaging groove 21-5 of the LED lamp body 2 is connected to the connecting plate position fixing extension portion. 12, and the rotation locking piece 21-7 of the LED lamp main body 2 is engaged with the rotation engagement portion 14 of the connecting plate 1.
Finally, the upper surface 21-1 of the LED lamp body 2 is joined so as to be in close contact with the connecting plate 1, and the LED lamp body 2 is rotated by a predetermined angle within the above-described rotation restriction range. Thereby, the rotation locking piece 21-7 of the LED lamp body 2 is engaged with the locking tongue piece 14-2 of the connection plate 1, and the LED lamp body 2 is mounted on the rotation connection plate 1.

As described above, in the present embodiment, the connecting plate 1 is a single plate, and the housing 21 of the LED lamp main body 2 has a flat cylindrical shape, and sequentially penetrates from the side closer to the irradiated surface side. The optical cover 28, the shielding plate 27, the substrate 26, the convex portion 21-8 formed on the inner wall of the housing upper surface side 21-1, and the connecting plate 1, the rotation axis of each of these members and the LED element The 24 optical axes are arranged so as to be substantially parallel. Thus, the LED lighting device 100 has a small amount of protrusion from the ceiling surface 4 and exhibits a good design.
In the present embodiment, the casing 21 has a cylindrical shape, but is not limited thereto, and may be a flat polygonal column having a quadrangular cross section.

1: Connection plate 11: Connection plate power supply opening 12: Connection plate position fixed extension 13: Rotation restricting hole 14: Rotation engagement portion 2: LED lamp body 21: Housing 22: Fast connection terminal 23 : Quick connection terminal storage unit 24: LED element 25: Electronic component 26: Substrate 27: Shielding plate 28: Translucent cover 29: Light guide plate 3: External power supply line 4: Ceiling surface 100: LED lighting device

Claims (7)

An LED lamp body on which an LED element is mounted; and an LED lamp body that houses a lighting circuit board on which an electronic component that constitutes a lighting circuit for driving the LED element is mounted;
A connecting plate fixed to the attached portion and detachably attached to the LED lamp,
The connecting plate is formed by processing a single sheet metal and has a power supply opening through which an external power supply line drawn out from a through hole of an external power supply wire formed in the attached portion is inserted. And
The connecting plate and the LED lamp body are detachably mounted by a locking means for rotating and fixing the LED lamp body with respect to the connecting plate,
The housing has thermal conductivity,
The LED lighting device, wherein a substrate in a region where the LED element is mounted is in contact with at least a part of an inner wall of the housing. The LED lighting device according to claim 1, wherein the connection plate is fitted on the outer peripheral edge of the upper surface of the LED lamp body in a state of being mounted on the LED lamp body. The LED illumination according to claim 1 , wherein a convex portion is formed on the housing side of the substrate of the housing, and the substrate in a region where the LED element is mounted is in contact with the convex portion. apparatus. An electronic part constituting the lighting circuit and the LED elements are mounted on the same substrate, the back surface portion of a region where the LED element is mounted is in contact with the convex portion of the housing, wherein The back surface of the board | substrate of the area | region where the electronic component which comprises a lighting circuit is mounted is spaced apart from the inner wall of the housing | casing of the said LED lamp main body, The Claim 1 characterized by the above-mentioned. LED lighting device. A heat radiating surface is formed on the back surface portion of the substrate corresponding to a mounting region of the LED element and a mounting region of an electronic component constituting the lighting circuit, and the heat radiating surface of the region where the LED element is mounted The LED lighting device according to claim 4 , wherein the LED lighting device is in contact with a convex portion of the housing. An electrically insulating heat-dissipating resin or heat-dissipating sheet is provided in a space formed by separating the back surface of the substrate in the region where the electronic components constituting the lighting circuit are mounted and the inner wall of the housing of the LED lamp body. The LED illumination device according to claim 4 or 5, wherein the LED illumination device is provided.   The LED lighting device according to claim 1, wherein the connecting plate is a heat conductive material.