JP2014120412A - LED lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp in which reliability of connection between a translucent cover and a lamp body is enhanced, and in which it does not occur that the translucent cover falls or only the translucent cover is removed when removing the LED lamp from a socket, in an illumination device having a long life light emitting diode as a light source.SOLUTION: An adhesive agent is injected in an annular groove 26 formed by an outer peripheral wall 33 of a heat conduction mounting member 3 and an inner wall of a heat radiation member 4, and a locking part 52 for locking provided at an annular extension part 51 of a translucent cover 5 is positioned to cover from above at a positioning part 35 provided in the heat conduction mounting part 3, and the translucent cover 5 is rotated in a counterclockwise direction. By this rotation operation, the locking part 52 is fixed by the adhesive agent in a state where it is locked with a protrusion 38 for locking of the heat conduction mounting member 3.

Description

  The present invention relates to an LED lamp capable of replacing a light bulb using a solid light emitting element such as a light emitting diode.

In recent years, due to an increase in environmental awareness, lighting devices using LED elements excellent in power saving as light sources have been actively used. Particularly recently, LED lamps that can be replaced as they are in a general lighting device using an incandescent light bulb are rapidly spreading.

JP 2008-91140 A

Patent Document 1 discloses a light-emitting diode mounted on a substrate, a lighting device that lights the light-emitting diode, a cover that houses the lighting device, a cap attached to one side, and a substrate attached to the other side; The LED lamp which consists of a translucent glove attached to the other side of the cover so as to cover is shown.

  The translucent globe is made of synthetic resin or glass because it approximates the external shape of a conventional incandescent bulb and requires translucency. On the other hand, the main body to which the globe is joined is formed of a metal having a good thermal conductivity, such as aluminum, for example, in order to dissipate the heat of the light emitting diode and suppress a decrease in light emission efficiency.

  For this reason, an adhesive made of a silicon resin, an epoxy resin, or the like that has heat resistance, ultraviolet resistance, electrical insulation, and moisture resistance is used to bond the translucent globe and the main body.

  However, since LED lamps are used for a long time because of their low power consumption and long life, it is also important to ensure safety at the end of life. For example, the adhesive may be deteriorated before the lifetime of the light emitting diode. When the adhesive deteriorates, the translucent globe of the LED lamp mounted on the lighting fixture may fall. Even if it does not fall, when removing the light bulb from the socket of the lighting fixture in order to replace the light bulb, if the adhesive strength between the light-transmitting glove and the light bulb body is reduced, only the light-transmitting glove will be removed and the main body will be the socket. There is a problem that the gripping amount of the main body portion becomes small and cannot be removed from the socket. Moreover, if only the translucent globe is removed, the electrical wiring part such as the light emitting diode is exposed, which is dangerous.

  The present invention has been made in view of the above problems, and in a lighting device using a light-emitting diode having a long life as a light source, the reliability of the coupling between the translucent globe and the main body is improved, An object of the present invention is to provide an LED lamp in which only a translucent glove does not come off when the bulb is removed from the socket.

In the invention of claim 1, the LED board on which the LED element is mounted, a mounting member that mounts the LED board to dissipate heat, a cylindrical insulating housing that houses the lighting circuit board, In an LED lamp including a cylindrical heat radiating member that houses an insulating housing and a translucent cover that is mounted so as to cover the LED substrate, the mounting member is fixed to one end opening side of the heat radiating member. In addition, the translucent cover is locked to the mounting member.

In the invention according to claim 2, the translucent cover is rotationally locked with respect to the mounting member, and an adhesive is loaded in a gap between the mounting member and the heat dissipation member. The translucent cover and the heat radiating member are fixed to each other.

In the invention described in claim 3, the translucent cover is rotated counterclockwise to be locked to the mounting member.

In the invention according to claim 4, the locking portion provided in the annular extending portion of the translucent cover,
Positioning on the positioning portion provided on the mounting member and covering from above, the locking portion is formed on the locking projection of the mounting member formed in a direction in which the translucent cover is rotated counterclockwise. And an adhesive is loaded into an annular groove formed by the outer peripheral wall of the mounting member and the inner wall of the heat dissipation member.

  According to the first and second aspects of the present invention, the translucent cover is locked to the mounting member by being rotated coaxially with the mounting member, and is fixed by using the adhesive together. LED can prevent the translucent cover from falling because the translucent cover is mechanically locked to the mounting member even if the adhesive strength between the translucent cover and the LED lamp body decreases at the end of the life of the LED A lamp can be provided.

  According to the inventions of claims 3 to 4, even if the LED lamp is rotated counterclockwise in order to remove the LED lamp from the socket of the lighting fixture, the translucent cover is rotated counterclockwise. Since it is locked, even if the adhesive force between the translucent cover and the LED lamp main body is reduced, it is not the rotational direction in which the translucent cover is unlocked, so only the translucent glove is detached and the main body An LED lamp can be provided in which no part remains in the socket.

The perspective view which looked at the LED lamp of this embodiment from the upper part The exploded perspective view which looked at the LED lamp of this embodiment from diagonally upward The exploded perspective view which looked at the LED lamp of this embodiment from diagonally downward It is a figure explaining the assembly method of the LED lamp of this embodiment, (a)-(c) is the perspective view seen from diagonally upward which shows the assembly procedure. It is the LED lamp of this embodiment, (a) is a front view, (b) is AA sectional drawing of (a). It is a figure explaining the assembly method of the translucent cover of this embodiment, (a)-(c) is the perspective view seen from diagonally upward which shows the assembly procedure.

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

    FIG. 1 is a perspective view of the LED lamp 1 according to the present embodiment as viewed from above, and FIG. 2 is an exploded perspective view of the LED lamp according to the present embodiment as viewed obliquely from above. FIG. 3 is an exploded perspective view of the LED lamp according to the present embodiment as viewed obliquely from below.

  As shown in FIGS. 2 and 3, the LED lamp 1 includes an LED element 21 (light emitting diode), an LED substrate 2 on which the LED element 21 is mounted, and a heat conductive mounting member 3 on which the LED substrate 2 is mounted. The holder 110 that holds the LED substrate 2 on the heat conductive mounting member 3 from above, the heat radiating member 4 (main body) that includes the heat conductive mounting member 3 at the other end, and the translucent property that covers the LED substrate 2 A cover 5 (translucent globe), a lighting circuit board 6 on which a plurality of electronic components 61 are mounted, and an insulating housing 7 (circuit housing) that houses the lighting circuit board 6 and is disposed in the heat dissipation member 4 Members), an insulating lid 8 that houses the lighting circuit board 6 in the insulating casing 7 and closes the opening of the insulating casing 7, a bush 9 that is screwed and fixed to the heat radiating member 4, and a base member 10 With.

  The LED board 2 is composed of a board 22 and an LED element 21 mounted on the main surface of the board 22. The board 22 is a printed board such as a substantially rectangular glass epoxy board, metal board, ceramic board, etc. In the embodiment, a printed board made of a metal substrate coated with an electrically insulating resin was used. In this embodiment, the LED element 21 is a high-luminance type that emits white light for illumination.

  The heat conduction mounting member 3 is made of a metal material such as aluminum having a high thermal conductivity, and the LED substrate 2 is mounted on the other end of the substantially bowl-shaped cylindrical heat radiation member 4 having both ends opened. Fixed by. The heat conductive mounting member 3 has a disk shape having an annular extending portion 34 extending radially outward, and is placed on the mounting portion 31 by a holder 110 which will be described later so that the lower surface of the LED substrate 2 is in surface contact. Pressed and fixed.

  The heat conduction mounting member 3 is provided with a plurality of screwing through holes 40 penetrating in the thickness direction and a plurality of through portions 36 for passing a power supply line from the lighting circuit. Further, in order to engage the translucent cover 5, a locking projection 38 is provided on the outer peripheral wall 33 from the axial center outward in the radial direction. A part of the annular extended portion 34 has the same diameter as the outer peripheral wall 33 and has a positioning portion 35 for locking the translucent cover 5 corresponding to the locking protrusion 38. Yes.

  The holder 110 is made of a general-purpose resin such as a PBT resin, and has a square hole 115 and is formed in a disk shape. A through hole 113 for screwing is provided, and a concave seat 112 that accommodates the head of the screw 25 is recessed around the through hole 113.

  At the edges of all four sides of the square hole 115, there are extended portions 116 extending inwardly, the outer peripheral portion of the substrate 22 of the LED substrate 2 is pressed from above, and the LED substrate 2 is subjected to the heat conduction. Position and press against the mounting member 3. The outer peripheral wall 114 is set to have a slightly smaller diameter than the outer peripheral wall 33 of the heat conducting placement member 3. This is for facilitating the locking of the translucent cover 5 described later to the heat conductive mounting member 3.

  As shown in FIG. 2, the heat dissipating member 4 has a hollow bowl-shaped cylindrical shape in which a plurality of heat dissipating fins 45 are integrally formed radially on a cylindrical outer shell, and both ends are open, and one end side having a large outer diameter. The heat conduction mounting member receiving surface 46 that receives the outer peripheral portion of the lower surface 32 of the heat conduction mounting member 3 and the screwing boss 42 in which the screwing lower hole 43 is formed are formed on the same inner wall. ing. The heat conduction mounting member 3, the LED board 2, and the holder 110 are fixed to the screw boss 42 by screwing, and heat generated when the LED element 21 is lit is transmitted from the board 22 of the LED board 2 to the screw boss 42. The mounting member 3 has a heat dissipating function for transferring heat from the heat conducting mounting member 3 to the heat dissipating member 4 to dissipate heat to the outside air.

As shown in FIG. 3, a threaded portion 47 is formed on the inner wall on one end side of the heat radiating member 4 until the lower end surface 48 of the heat radiating member 4 abuts a contact portion 98 of a bush 9 (cylindrical member) described later. The bushing 9 is fixed to the heat radiating member 4 by screwing. The heat dissipating member 4 accommodates an insulating housing 7 inside, and the lighting circuit board 6 is held in the insulating housing 7 and the bush 9. (Figs. 4 and 5)

  The insulating casing 7 is formed in a hollow, substantially cylindrical shape using a general-purpose resin having a thermal conductivity smaller than that of the heat radiating member 4. In this embodiment, the PBT resin is used. However, the present invention is not limited to this, and a known resin material such as PET, PC, polyimide resin or the like can be used.

As shown in FIG. 2, the insulating housing 7 is formed in a hollow bowl-shaped cylindrical shape that is open on both sides, and the cylindrical portion 71 avoids interference with the screwing boss 42 formed on the heat radiating member 4. A half-moon shaped escape portion 72 is provided.

  As shown in FIG. 3, a bottom wall 75 and an annular extension 76 are formed at the lower end (bottom surface) of the cylindrical portion 71 of the insulating housing 7, and the annular extension 76 and a bush 9 described later. Is electrically insulated from the lighting circuit board 6 and the inner wall of the heat dissipating member 4. Further, the upper opening side of the cylindrical portion 71 is closed by an insulating lid 8 which will be described later.

  As shown in FIGS. 2 and 3, the insulating lid 8 is formed in a bottomed shallow dish shape having a lid portion 81 and an outer peripheral edge portion 82 using a general-purpose resin having a small thermal conductivity like the insulating housing 7. The bottom portion 88 faces the lighting circuit board 6.

  A half-moon-shaped notch 86 corresponding to the half-moon-shaped relief portion 72 formed in the insulating housing 7 is formed on the outer periphery of the lid portion 81 of the insulating lid 8, and the heat conduction mount is formed on the main surface of the lid portion 81. A round boss 83 inserted from the lower surface 32 side and a rectangular column 85 are established in the through hole 39 and the square hole 37 formed in the mounting member 3. Positioning in the rotational direction around the axis center by a round boss 83 inserted into the through hole 39 and fitting the prism 85 into the square hole 37, the insulating lid 8 is connected to the lower surface 32 of the heat conduction mounting member 3. Join.

  The lighting circuit board 6 has a plurality of electronic components 61 mounted on a board 62, and a power supply line (not shown) that feeds power to the LED board 2 from the opposite surface of the board 62 on which the electronic parts 61 are mounted is an insulating lid 8. Are connected to the LED substrate 2 through the through-hole 87 for the power supply line. An integrally formed rib 84 is erected on the periphery of the feed line through hole 87 of the insulating lid 8 to protect the feed line from touching the heat conduction mounting member 3 made of a metal material. The ribs 84 are engaged with the through portions 36 of the heat conducting placement member 3.

  The bush 9 is formed into a bottomed cylindrical shape having an opening 92 using a general-purpose resin having a small thermal conductivity similar to the insulating housing 7, and a power supply line for supplying power to the lighting circuit board 6 (not shown) on the bottom 95. A bottom opening 96 is provided to pass through. The cylindrical outer shell of the bush 9 is formed with a first screw portion 94 that is screwed with the heat radiating member 4 and a second screw portion 91 that is screwed with the base member, and the first screw portion 94 and the second screw. Between the portions 91, there is a flange portion 93 extending outward in the radial direction, and a contact portion 98 (FIG. 2) is formed as a stopper function when screwing and fixing to the heat radiating member 4. Yes.

  The base member 10 is for screwing into a socket of a lighting fixture and receiving power from the socket. The base member 10 has a screw portion 101 and a tip portion 102 and is screwed with a second screw portion 91 formed on the cylindrical outer shell of the bush 9. Match.

  The translucent cover 5 is formed in a dome shape using a polycarbonate resin containing a diffusing material. An annular extending portion 51 is provided at the opening end of the translucent cover 5, and has a pair of locking portions 52 formed in the circumferential direction of the annular extending portion 51. Along with the locking of the locking portion 52 for locking, an adhesive is applied to the annular groove 26 (FIG. 4C) formed by the outer peripheral wall 33 of the heat conduction mounting member 3 and the inner wall of the heat radiating member 4. And the annular extending portion 51 is fixed.

The assembly method of the LED bulb according to the present embodiment will be described with reference to FIGS.
First, as shown in FIG. 4A, the first threaded portion 94 of the bush 9 is screwed into the threaded portion 47 of the heat radiating member 4, and then the insulating casing 7 has an opening diameter of the heat radiating member 4. Insert from the large opening side. At this time, the screwing boss 42 of the heat radiating member 4 and the half-moon-shaped relief portion 72 of the insulating member 4 are aligned and inserted.

  In this state, the inner surface side of the heat radiating member 4 is covered with the bush 9 made of an insulating material and the insulating housing 7, and insulation is maintained. Next, the lighting circuit board 6 is inserted into the insulating casing 7 from the smaller width dimension of the board 62. The insulating casing of the lighting circuit board 6 is formed by changing the width dimension of the board 62 stepwise and the convex part 63 formed on the opposite surface of the board 62 on which the plurality of electronic components 61 are mounted. 7 is intended to stabilize the posture.

  Then, the base member 10 is screwed into the second screw portion 91 of the bush 9, and a power supply line for supplying power to a lighting circuit (not shown) is joined to the base member 10 by soldering to be electrically connected.

  The insulating lid 8 is positioned and attached to the lower surface 32 side of the heat conduction mounting member 3. As described above, the square hole 37 of the heat conducting placement member 3 and the square column 85 provided in the insulating lid are fitted and the insulating lid 8 is held on the lower surface 32 of the heat conducting placement member 3.

  Next, the lower surface of the substrate 22 of the LED substrate 2 is placed on the mounting portion 31 of the heat conductive mounting member 3 and the holder 110 is placed thereon. The holder 110 positions the through-hole 113 for screwing in the screw-through through-hole 40 of the heat conduction mounting member 3, and feeds the power supply line from the lighting circuit (not shown) upward through the power supply line through-hole 87 of the insulating lid 9. I will guide you.

  In this state, the heat dissipating member 4 is positioned with the screwed pilot hole 43 and placed on the heat conducting mounting member receiving surface 46, and is fixed to the heat dissipating member 4 with screws 25 (FIG. 4B). By tightening the screw 25, the lower surface of the LED substrate 2 and the heat conductive mounting member 3 can be brought into close contact with each other, and heat generated from the LED element 21 can be efficiently transmitted to the heat conductive mounting member 3. Once fixed, the feeder line from the lighting circuit (not shown) is electrically joined to the substrate 22 of the LED substrate 2 by soldering.

  Next, a method for assembling the translucent cover 5 will be described with reference to FIGS. In FIG. 6, the heat radiating member 4, the bush 9, and the base member 10 that are visible on the external appearance are not shown for ease of explanation. First, an adhesive is injected into an annular groove 26 formed by the outer peripheral wall 33 of the heat conduction mounting member 3 and the inner wall of the heat radiating member 4 shown in FIG. 4 (c), and as shown in FIG. 6 (a). The locking portion 52 provided on the annular extending portion 51 of the light cover 5 is positioned on the positioning portion 35 provided on the heat conducting mounting member 3 so as to cover from above and the light transmitting cover 5 is rotated counterclockwise. . (FIG. 6 (b)) By this rotation operation, the locking portion 52 is locked with the locking protrusion 38 of the heat conduction mounting member 3 (FIG. 6 (c)). Fixed by. The reason why the translucent cover 5 and the heat conductive mounting member 3 are locked in the counterclockwise direction is that the translucent cover 5 is used to remove the LED lamp from the socket even when the adhesive has deteriorated. This is to prevent only the translucent cover 5 from being detached when it is held and rotated counterclockwise.

  Thereby, the mounting of the translucent cover 5 is completed, and the LED lamp 1 is completed.

DESCRIPTION OF SYMBOLS 1 LED lamp 2 LED board 21 LED element 22 Board | substrate 25 Screw 3 Heat conduction mounting member 31 Mounting part 32 Lower surface 33 Outer peripheral wall 34 Extension part 35 Positioning part 36 Through part 37 Square hole 38 Locking protrusion part 39 Through hole 4 Heat-dissipating member 40 Screwing through hole 41 Tube wall 42 Screwing boss 43 Screwing pilot hole 45 Fin 46 Heat conduction mounting member receiving surface 47 Screw part 48 Lower end surface 5 Translucent cover 51 Annular extension part 52 Locking part 6 lighting circuit board 61 electronic component 62 board 63 convex part 7 insulating casing 71 cylindrical part 72 half-moon escape part 73 inner wall 74 opening side end face 75 bottom wall 76 annular extension part 8 insulating lid 81 lid part 82 outer peripheral edge part 83 Round boss 84 Rib 85 Square column 86 Half-moon notch 87 Feed wire through-hole 88 Bottom 9 Bush 91 Second threaded portion 92 Opening portion 93 Hut portion 94 First screw portion 95 Bottom portion 96 Bottom portion Mouth 10 cap member 101 threaded portion 102 tip 110 holder 111 upper surface 112 seat 113 through hole 114 outer peripheral wall 115 rectangular hole 116 extending portion 117 bottom surface

Claims (4)

An LED substrate on which an LED element is mounted;
A mounting member for mounting and dissipating heat on the LED substrate;
A cylindrical insulating housing that houses the lighting circuit board;
A cylindrical heat radiating member that houses the insulating housing;
A translucent cover mounted to cover the LED substrate;
In an LED lamp with
While fixing the mounting member on one end opening side of the heat dissipation member,
An LED lamp characterized in that the translucent cover is locked to the mounting member. The translucent cover is intended to be rotationally locked to the mounting member described above,
Loading the adhesive in the gap between the mounting member and the heat dissipation member,
The LED lamp according to claim 1, wherein the translucent cover and the heat dissipation member are fixed.   The LED lamp according to claim 1 or 2, wherein the translucent cover is rotated counterclockwise and locked to the mounting member. A locking part provided in the annular extension part of the translucent cover,
Positioned on the positioning part provided in the mounting member and covered from above,
In the locking projection of the mounting member formed in the direction in which the translucent cover is rotated counterclockwise,
While locking the locking portion,
In the annular groove formed by the outer peripheral wall of the mounting member and the inner wall of the heat dissipation member,
The LED lamp according to any one of claims 1 to 3, wherein an adhesive is loaded.