JP2014112470A - Led lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting device which inhibits thermal degradation of LED elements and electronic components and is easily attached to a ceiling surface despite its thin and flat shape.SOLUTION: An LED lighting device includes: an LED lamp body having substrates on which LED elements and electronic components forming a lighting circuit are respectively mounted; and a connection plate to which the LED lamp body is attached. One surface of the connection plate is attached to an attached part of a ceiling etc., in which a small hole for leading out an exterior power source cable is formed, by fixing means. The LED lamp body is detachably attached to the other surface of the connection plate.

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 self-powered light bulb type LED lamp using an LED element excellent in power saving as a light source has been widespread. 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, in the illuminating device described in Patent Documents 1 and 2, the translucent cover is removed from the illuminating device body, the base portion of the illuminating device body is screwed to the ceiling surface, and the translucent cover is attached again. There is a possibility that the LED element may be damaged at the time of attachment, and the lighting device cannot be easily attached.
Moreover, in the illuminating device described in Patent Document 3, the height from the ceiling surface to the illuminating device lower surface cannot be made thinner than the thickness obtained by adding the thickness of the hooking ceiling body and the thickness of the hooking ceiling adapter. It is a device.

The present invention has been made as a result of intensive studies to solve the above-described problems, and is an LED that can be easily mounted on a ceiling surface while suppressing thermal deterioration of the LED elements and electronic components while being thin and flat. An illumination device is provided.

In the invention according to claim 1, an LED lamp body having an LED board on which an LED element is mounted, and a lighting circuit board on which an electronic component that constitutes a lighting circuit for driving the LED element is mounted, In an LED lighting device including a connecting plate to which the LED lamp body is attached, one surface of the connecting plate is attached to a mounting portion such as a ceiling by a fixing means, and the LED lamp is attached to the other surface of the connecting plate. The main body is detachably attached.

  According to a second aspect of the present invention, the LED lamp main body and the connecting plate are each formed with a power supply opening, and the LED lamp is mounted on the connecting plate so that these power supply openings overlap. A main body is attached, and power from an external power source is supplied to the LED lamp main body through these power supply openings.

According to a third aspect of the present invention, a rotation engagement portion is formed on the upper surface of the LED lamp body, and a rotation engagement portion that engages the rotation engagement portion is formed on the lower surface of the connecting plate. It is characterized by that.

According to a fourth aspect of the present invention, there is provided a recess in the center of the upper surface of the LED lamp body, and a rotation locking piece that extends away from the bottom surface of the recess toward the center of the LED lamp. Is formed at a position corresponding to the rotation locking piece on the lower surface of the connecting plate, and an upper surface of the LED lamp body, The rotation locking piece is engaged with the upper surface of the locking tongue piece by joining the lower surface of the connecting plate and rotating the LED lamp.

In invention of Claim 5, the LED lamp position fixed extension part extended toward the said connection board is formed in the peripheral part of the said LED lamp power supply opening part, An engagement groove in which a connecting plate position fixing extension portion extending toward the attached portion is formed in a peripheral portion, and the connecting plate position fixing extension portion engages with the LED lamp position fixing extension portion. Is formed.

  In the invention of claim 6, the width of the engagement groove is set such that the LED lamp body has a predetermined width relative to the connection plate when one surface of the LED lamp body and one surface of the connection plate are joined. The connecting plate position fixing extension portion is formed to be larger than the width of the connecting plate position fixing extension portion so that the angle can be rotated.

  In the invention according to claim 7, a rotation restricting projection is formed on the upper surface of the LED lamp body, and a rotation restricting hole portion into which the rotation restricting projection is fitted is formed in the connecting plate, and the LED lamp When the upper surface of the main body and the lower surface of the connecting plate are joined, the rotation range of the LED lamp main body is restricted by a gap formed between the rotation restriction protrusion and the rotation restriction hole. It is characterized by doing.

  The invention according to claim 8 is characterized in that the connecting plate is formed using a heat conductive material.

  The invention according to claim 9 is characterized in that the casing of the LED lamp main body is formed using a heat conductive material.

  The invention according to claim 10 is characterized in that the LED lamp main body contains a quick connection terminal to which an external electric wire inserted from the LED lamp power supply opening is connected. .

  In the invention of claim 11, the quick connection terminal is housed in an electrically insulating fast connection terminal housing portion, and the quick connection terminal housing portion is housed in the LED lamp power supply opening. It is a feature.

  The invention according to claim 12 is characterized in that the LED lamp main body contains a connector to which an external electric wire provided with a plug at the tip is connected instead of the quick-connect terminal. It is.

  In the invention according to claim 13, instead of the quick connection terminal, a plug is provided at the tip of the electric wire led out from the LED lamp power supply opening, and the plug and the plug of the external electric wire are connected. It is characterized by this.

  In the invention described in claim 14, the LED substrate and the lighting circuit substrate are arranged on the same plane.

  The invention according to claim 15 is characterized in that the LED element and the electronic components constituting the lighting circuit are mounted on the same substrate.

  In the invention described in claim 16, the substrate has a mounting region A located on the center side of the substrate and a mounting region B located on the outer peripheral side of the substrate, and the LED element and the The electronic components that make up the lighting circuit are divided into the mounting area A and the mounting area B and are mounted.

  In the invention described in claim 17, the substrate is formed of a substantially circular substrate, and the mounting region A is formed of a circle having the same center as the center of the substrate, and is disposed in a central portion of the substrate. The mounting area B has a band shape close to at least a part of the outer periphery of the mounting area A, and is located on the outer peripheral side of the substrate.

The invention according to claim 18 is characterized in that the LED element is mounted in the mounting area A and the electronic components constituting the lighting circuit are mounted in the mounting area B.

  The invention according to claim 19 is characterized in that an electronic component constituting the lighting circuit is mounted in the mounting area A, and the LED element is mounted in the mounting area B.

  In the invention described in claim 20, the substrate is provided with a high thermal resistance region having a smaller thermal conductivity coefficient than the mounting region A and the mounting region B, and the high thermal resistance region includes the mounting region A and the mounting region A. It is located at the boundary with the mounting area B.

  The invention according to claim 21 is characterized in that the substrate is provided with a planar power input surface to which power is input from an external power source.

  The invention according to claim 22 is characterized in that the quick-connection terminal is provided with a contact having an elastic force that is pressed against the power input surface.

  In the invention described in claim 23, the one end portion of the connector housed in the LED lamp main body is provided with a contact member having an elastic force that is pressed against the power input surface. To do.

  According to a twenty-fourth aspect of the present invention, a through hole is formed in a part of a region of a substrate on which the electronic component constituting the lighting circuit is mounted, and one electronic component constituting the lighting circuit is formed in the through hole. The portion is arranged.

  In the invention of claim 25, the back surface of the substrate in the region where the LED element is mounted is in contact with at least a part of the inner wall of the housing of the LED lamp body. .

  The invention described in claim 26 is characterized in that a convex portion is formed on the substrate housing side of the LED lamp main body, and the convex portion is in contact with a part of the substrate.

  The invention according to claim 27 is characterized in that a back surface portion of a region where the LED element of the substrate is mounted is brought into contact with the convex portion.

  In the invention described in claim 28, the back surface of the substrate in the region where the electronic components constituting the lighting circuit are mounted is separated from the inner wall of the housing of the LED lamp body. is there.

  In the invention according to claim 29, 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 housing of the LED lamp body, An insulating heat radiating resin or a heat radiating sheet is provided.

  In the invention according to claim 30, the LED lamp main body includes a light-transmitting cover that covers a side on which the LED element is mounted, and a shielding plate that covers a region on which the electronic components constituting the lighting circuit are mounted. And the shielding plate is arranged between the substrate and the translucent cover.

  In the invention according to claim 31, the shielding plate has a curved surface shape provided with a reflecting surface for reflecting the emitted light of the LED element, and one end surface of the shielding plate is a mounting area A of the substrate. The other end face of the shielding plate is located so as to cover the area where the electronic components constituting the lighting circuit are mounted.

  The invention according to claim 32 is characterized in that the shielding plate is formed of an electrically insulating material.

  The invention according to claim 33 is characterized in that a space is provided between the inner wall of the translucent cover and the surface of the shielding plate facing the inner wall of the translucent cover. .

  The invention according to claim 34 is characterized in that a surface of the shielding plate facing the inner wall of the translucent cover is a reflecting surface.

  The invention according to claim 35 is characterized in that a light guide plate that receives light emitted from the LED element and emits light toward the inner wall of the translucent cover is provided on the surface of the shielding plate. To do.

  According to a thirty-sixth aspect of the present invention, the light guide plate is disposed in a space between an inner wall of the translucent cover and a surface of the shielding plate facing the inner wall of the translucent cover, A surface of the light plate that faces the translucent cover is a light emitting surface.

In the invention according to claim 37, the casing of the LED lamp has a flat cylindrical shape or a flat polygonal column shape, and in order from the side closer to the irradiated surface side, the translucent cover and The shielding plate, the substrate, the convex portion formed on the inner wall on the upper surface side of the housing, and the connecting plate are such that the rotation axis of each member and the optical axis of the LED element are substantially parallel. It is characterized by being arranged like this.

Provided is a flat LED lighting device with good workability that can be easily attached by simply making a small hole in the ceiling surface by the rotation engagement structure and the substrate structure of the connecting plate and the LED lamp body of the present invention. it can.
In addition, the LED lamp main body and the substrate structure of the present invention provide a long-life LED illuminating device that is flat but suppresses the temperature rise of electronic components that constitute each LED element and lighting circuit. it can.
Furthermore, by providing the shielding plate and the light guide plate of the present invention, an LED illumination device free from uneven brightness can be provided.

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 holes, 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. If the hole has a diameter of 15 mm or less, no special reinforcement is applied to the ceiling, so that the LED lighting device can be attached with good 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 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. The two connecting plate position fixing extension portions 12 facilitate positioning of the connecting plate 1 in the hole, and the connecting plate 1 can be easily attached to the ceiling surface 4.
Further, 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. The pair of rotation restricting hole portions 13 form a ribbon-shaped through hole communicating with the pair.

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.
The rotation locking piece insertion openings 14-1 are substantially fan-shaped openings, and are provided at four positions 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, 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. 10 to 14, the LED lamp main body 2 houses a housing 21, a quick connection terminal 22 to which an external power supply line housed in the housing 21 is connected, and a quick connection terminal 22. A substrate 26 on which a quick-connection terminal accommodating portion 23, a plurality of LED elements 24, and various electronic components 25 constituting a lighting circuit for lighting the LED elements 24 are mounted; a shielding plate 27 that covers the electronic components 25; A transparent cover 28 that covers the opening of the body 21 is schematically configured.

The casing 21 is made of aluminum and is formed into a flat shape with a low height by a hollow bottomed cylinder having an open end.
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 part 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 the LED lamp main body 2 is integrated when the connecting plate 1 is mounted. It has become.

A cylindrical LED lamp power supply opening 21-3 opened in a rectangular shape is erected at the center of the recess 21-2. 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. Note that 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 is inserted into the rotation restricting hole 13 of the connecting plate 1, and the rotation range of the LED lamp body 2 is determined by an angle that can be rotated at an angle that forms a fan of the rotation restricting hole 13. Has been. 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 trapezoidal rotation locking piece 21-7 extending toward the center of the LED lamp body 2 is formed on the upper surface 21-1 of the casing 21 in the vicinity of the stepped portion of the recess 21-2. 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, and rotated after the upper surface 21-1 of the housing 21 and the one end surface side of the connecting plate 1 are joined together. It is inserted in the upper surface of the 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. A lock structure for restricting and releasing the rotation may be separately provided.

  The quick connection terminal 22 is formed by processing a metal plate into an L shape. As shown in FIG. 16, the quick connection terminal 22 includes a quick connection terminal portion 22-1 into which an external power source is inserted, and the other end. A contact 22-2 is integrally provided on the 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. Two quick-connecting terminal portions 22-1 are accommodated in the hollow cylindrical T-shaped vertical bar portion 23-2 provided, and contacts 22-2 are accommodated in the T-shaped horizontal bar portion 23-3. The The shape of the opening of the hollow cylindrical portion is a long rectangular shape, an insulating plate 23-4 is provided at the center, and the housing is divided into two having a wire insertion hole 23-5 inside the cylindrical shape. A 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 bar portion 23-2 is inside the LED lamp position fixing extension portion 21-4 of the housing 21. The T-shaped horizontal bar 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.
Moreover, the power supply line connected to the lighting circuit may be extended from the LED lamp main body 2, a plug may be attached to the tip of the power supply line, and the external power supply line may be inserted into the plug.

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 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 a mounting surface side (front side) of the substrate, and a circular mounting region A is formed on the center side of the substrate 26, and a strip-like semi-annular shape (approximately 3/4 round) is formed outside the mounting region A. 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 ring is formed larger than the thickness of the substrate, and the heat generated in the LED element 24 reaches the substrate back surface earlier than the mounting region B.
Furthermore, 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 has a circular convex portion (21-8 shown in FIG. 21) formed therein, and an annular concave portion (21-9 shown in FIG. 21) around the convex portion. Is forming. 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. 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 housing.
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 board input surface 26-2 is a copper foil, and is provided at a back surface position corresponding to the mounting region A. A power supply path 26-3 for supplying power to the mounting region B from the power input surface 26-2 is provided. 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.
In addition, if the above-mentioned electrically insulating heat dissipation 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, which eliminates the need for alignment and the like, which is preferable in manufacturing.

Further, the shape of the copper foil of the substrate 26 is formed as shown in FIGS. 24 and 25, the area of the copper foil in the mounting region A is increased, and the convex portion that is in contact with the entire surface is formed on the upper surface 21 of the housing 21. -1 may be provided. Thereby, the temperature rise of the LED element 24 is further suppressed.
Further, the T-shaped horizontal bar 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.

The shielding plate 27 is formed 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 flange portion 27-1 is provided on the inner side from the peripheral edge of the opened one end surface. One surface of the flange portion 27-1 is joined to the annular region 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. It is screwed to the upper surface 21-1.
The opened other end surface 27-2 is greatly expanded outward and is shaped like a bowl. The other end surface 27-2 covers and hides the mounting region B so that the electronic component 25 cannot be seen from the outside, and the bowl-shaped endmost portion is in contact with the inner periphery of the housing 21.
The inner wall surface 27-3 of the shielding plate 27 forms a diffuse reflection surface that is mirror-finished, and reflects the light emitted from the LED element 24 without absorbing it, and emits the light from the LED lamp 2 without loss. have.

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 other end surface 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 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 covered. By installing the light guide plate as the light emitting 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.

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 hole having a diameter of 15 mm is formed in the ceiling surface 4 and the external power supply line 3 is drawn out from the hole.
Next, the connecting plate position fixing extension portion 12 of the connecting plate 1 is inserted into the hole, 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.
Next, 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 2, and are inserted into the quick connection terminal portion 22-1.
Next, the engagement groove 21-5 of the LED lamp body is engaged with the connecting plate position fixing extension portion 12, and the rotation locking piece 21-7 of the LED lamp body is the rotation engaging portion 14 of the connection plate 1. The LED lamp position fixing extension portion 21-4 is inserted into the connecting plate power supply portion 11 of the connecting plate so as to engage with the connecting plate.
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, the LED lamp 2 is rotated by a predetermined angle, and the LED lamp 2 is attached to the connecting 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 2 has a flat cylindrical shape, and sequentially transmits light from the side closer to the irradiated surface side. The 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 are connected to the rotation axis of these members and the LED element 24. The optical axis is arranged substantially parallel to the optical axis. 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: connecting plate 11: connecting plate power supply opening 12: connecting plate position fixing extension 13: rotation restricting hole 14: rotation engaging portion 2: LED lamp body 21: housing 22: quick connecting terminal 23 : Quick connection terminal storage unit 24: LED element 25: Electronic component 26: Substrate 27: Shield plate 28: Translucent cover 29: Light guide plate 3: External power supply line 4: Ceiling surface 100: LED lighting device

Claims (37)

An LED lamp body having an LED board on which an LED element is mounted, and a lighting circuit board on which electronic components constituting a lighting circuit for driving the LED element are mounted;
In an LED lighting device comprising a connecting plate to which the LED lamp body is attached,
One surface of the connecting plate is attached to the attached portion such as a ceiling by a fixing means,
The LED lighting device, wherein the LED lamp body is detachably attached to the other surface of the connecting plate. Each of the LED lamp body and the connecting plate is formed with a power supply opening,
The LED lamp body is attached to the connecting plate so that these power supply openings overlap,
The LED lighting device according to claim 1, wherein power from an external power source is supplied to the LED lamp body through the power supply openings.   3. A rotation engaging portion is formed on the upper surface of the LED lamp body, and a rotation engaging portion for engaging the rotation engaging portion is formed on the lower surface of the connecting plate. LED illuminating device of description. A concave portion is provided in the center of the upper surface of the LED lamp body, and a rotation locking piece extending away from the bottom surface of the concave portion is formed toward the center direction of the LED lamp,
A locking tongue piece that rotates and engages with the rotation locking piece is provided at a position corresponding to the rotation locking piece on the lower surface of the connecting plate,
By joining the upper surface of the LED lamp body and the lower surface of the connecting plate and rotating the LED lamp, the rotation locking piece is engaged with the upper surface of the locking tongue piece. The LED illumination device according to any one of claims 1 to 3. An LED lamp position fixing extension portion extending toward the connection plate is formed at the peripheral edge portion of the LED lamp power supply opening,
A connecting plate position fixing extending portion extending toward the attached portion is formed at the peripheral edge of the connecting plate power supply opening,
The LED illumination device according to any one of claims 1 to 4, wherein an engagement groove with which the connecting plate position fixing extension portion is engaged is formed in the LED lamp position fixing extension portion.   The engagement groove has a width such that when the one surface of the LED lamp main body and one surface of the connecting plate are joined, the LED lamp main body can rotate a predetermined angle with respect to the connecting plate. The LED lighting device according to claim 5, wherein the LED lighting device is formed to be larger than a width of the connecting plate position fixing extension portion. A rotation restricting protrusion is formed on the upper surface of the LED lamp body,
A rotation restricting hole portion into which the rotation restricting protrusion is fitted is formed in the connection plate,
When the upper surface of the LED lamp main body and the lower surface of the connecting plate are joined, the rotation of the LED lamp main body is caused by a gap formed between the rotation restricting protrusion and the rotation restricting hole. The LED lighting device according to claim 1, wherein the range is restricted.   The LED lighting device according to claim 1, wherein the connecting plate is formed using a heat conductive material.   The LED lighting device according to any one of claims 1 to 8, wherein a casing of the LED lamp main body is formed using a heat conductive material.   The said LED lamp main body accommodates the quick connection terminal to which the external electric wire inserted from the said LED lamp electric power supply opening part is connected, The any one of Claim 3 to 9 characterized by the above-mentioned. LED illuminating device of description.   11. The LED according to claim 10, wherein the quick connection terminal is housed in an electrically insulating fast connection terminal housing portion, and the fast connection terminal housing portion is housed in the LED lamp power supply opening. Lighting device.   The LED lamp main body contains a connector to which an external electric wire provided with a plug at the tip is connected instead of the quick connection terminal. The LED lighting apparatus in any one.   In place of the quick connection terminal, a plug is provided at the tip of the electric wire led out from the LED lamp power supply opening, and the plug and the plug of the external electric wire are connected, and The LED lighting device according to claim 3.   The LED lighting device according to claim 1, wherein the LED substrate and the lighting circuit substrate are arranged on the same plane.   The LED lighting device according to any one of claims 1 to 14, wherein the LED element and an electronic component constituting the lighting circuit are mounted on the same substrate.   The board has a mounting area A located on the center side of the board and a mounting area B located on the outer periphery side of the board, and the electronic components constituting the LED element and the lighting circuit are The LED lighting device according to claim 15, wherein the LED lighting device is mounted by being divided into a mounting area A and a mounting area B. The substrate comprises a substantially circular substrate,
The mounting area A consists of a circle having the same center as the center of the substrate, and is disposed at the center of the substrate.
The LED lighting device according to claim 16, wherein the mounting region B has a band shape close to at least a part of the outer periphery of the mounting region A, and is located on the outer peripheral side of the substrate. The LED element is mounted in the mounting area A,
The LED lighting device according to claim 16 or 17, wherein an electronic component constituting the lighting circuit is mounted in the mounting region B. Electronic components constituting the lighting circuit are mounted in the mounting area A,
The LED lighting device according to claim 16 or 17, wherein the LED element is mounted in the mounting region B. The substrate is provided with a high thermal resistance region having a smaller thermal conductivity coefficient than the mounting region A and the mounting region B,
The LED lighting device according to any one of claims 16 to 19, wherein the high thermal resistance region is located at a boundary between the mounting region A and the mounting region B.   21. The LED lighting device according to claim 1, wherein the substrate is provided with a planar power input surface to which power is input from an external power source.   The LED lighting device according to claim 10, 11, and 21, wherein the quick-connection terminal is provided with an elastic contact member that is pressed against the power input surface.   22. The LED according to claim 12, wherein the one end of the connector housed in the LED lamp body is provided with a contact having an elastic force that is pressed against the power input surface. Lighting device. A through hole is formed in a part of the area of the substrate on which the electronic components constituting the lighting circuit are mounted,
The LED illumination device according to any one of claims 1 to 23, wherein a part of an electronic component constituting the lighting circuit is disposed in the through hole.   The LED illumination according to any one of claims 1 to 24, wherein a back surface of a substrate in a region where the LED element is mounted is in contact with at least a part of an inner wall of a housing of the LED lamp body. apparatus.   26. The LED lighting device according to claim 25, wherein a convex portion is formed on the substrate housing side of the LED lamp body, and the convex portion is in contact with a part of the substrate.   27. The LED lighting device according to claim 26, wherein a back surface portion of a region where the LED element of the substrate is mounted is brought into contact with the convex portion.   28. The LED according to claim 25, wherein a back surface of a substrate in a region where an electronic component constituting the lighting circuit is mounted is separated from an inner wall of a housing of the LED lamp body. Lighting device. In the 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 lighting device according to claim 28, further comprising an electrically insulating heat radiation resin or heat radiation sheet. In the LED lamp body, a translucent cover that covers the side on which the LED element is mounted;
And a shielding plate that covers an area where the electronic components constituting the lighting circuit are mounted,
30. The LED lighting device according to claim 1, wherein the shielding plate is disposed between the substrate and the translucent cover. The shielding plate is a curved surface provided with a reflecting surface for reflecting the emitted light of the LED element,
One end surface of the shielding plate is located at the boundary between the mounting area A and the mounting area B of the substrate,
The other end surface of the said shielding board is located so that the area | region where the electronic component which comprises the said lighting circuit is mounted may be covered.   32. The LED lighting device according to claim 30, wherein the shielding plate is formed of an electrically insulating material.   The LED illumination according to any one of claims 30 to 32, wherein a space is provided between an inner wall of the translucent cover and a surface of the shielding plate facing the inner wall of the translucent cover. apparatus.   The LED illumination device according to claim 32, wherein a surface of the shielding plate facing the inner wall of the translucent cover is a reflective surface.   35. The light guide plate according to any one of claims 30 to 34, further comprising: a light guide plate that receives light emitted from the LED element and emits light toward an inner wall of the translucent cover on the surface of the shielding plate. LED lighting apparatus of description. The light guide plate is disposed in a space between an inner wall of the translucent cover and a surface of the shielding plate facing the inner wall of the translucent cover,
36. The LED lighting device according to claim 35, wherein a surface of the light guide plate facing the translucent cover is a light emitting surface. The housing of the LED lamp has a flat cylindrical shape or a flat polygonal column shape,
In order from the side closer to the irradiated surface side, the translucent cover, the shielding plate, the substrate, a convex portion formed on the inner wall on the upper surface side of the housing, and the connecting plate, 37. The LED lighting device according to claim 1, wherein the rotation axis of the member and the optical axis of the LED element are arranged so as to be substantially parallel.