JP2012009451A - Led lamp and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DC-lit type LED lamp having less possibility of electric shocks.SOLUTION: In the LED lamp 100 which is mounted on a lighting fixture 200 having a base socket 220 and a grounding terminal receiving jig 240 and is lit up with DC, the LED lamp 100 includes an LED module 110 wherein a plurality of LEDs 113 are mounted on an elongated board 111 along its longitudinal direction, an elongated outer shell 101 wherein the LED module 110 is internally stored and at least a part of the outer shell is formed with a conductive member 120, a base 140 arranged at one end side of the outer shell 101 in the longitudinal direction and mounted on the base socket 220, and a grounding member 150 arranged at the other end side of the outer shell 101 in the longitudinal direction and having grounding terminals 152, 153 electrically connected to the conductive member 120 and mounted on the grounding terminal receiving jig 240.

Description

  The present invention relates to an LED lamp and a lighting fixture, and more particularly to a straight tube fluorescent lamp type LED lamp suitable as a substitute for a straight tube fluorescent lamp.

In order to reduce the replacement frequency due to the lifetime and to save power, an LED lamp having a longer lifetime and power saving than the fluorescent lamp has been proposed as an alternative to the fluorescent lamp.
For example, in the case of a straight tube fluorescent lamp type LED lamp that is a substitute for a straight tube fluorescent lamp, a long substrate having a length corresponding to the fluorescent lamp, and mounted on the substrate along the longitudinal direction It has the structure provided with several LED. An aluminum heat sink that constitutes a part of the outer shell is attached to the side of the substrate opposite to the LED, and the heat dissipation effect of the heat sink suppresses the LED temperature rise and prevents the LED luminous efficiency from decreasing. ing. Further, the LED lamp has a built-in lighting circuit including an AC / DC converter, and an AC voltage input from the lighting fixture is converted into a DC voltage by the lighting circuit and supplied to the LED for lighting.

  In such an AC lighting type LED lamp, since the lighting circuit is built in the LED lamp, the life of the lighting circuit is likely to be shortened by heat generated in the LED, and therefore the life of the LED lamp itself is also likely to be shortened. Further, the heat generated in the lighting circuit may increase the temperature of the LED and reduce the light emission efficiency of the LED. Furthermore, the built-in lighting circuit causes the LED lamp to become larger and more expensive. In view of this, a lighting circuit including an AC / DC converter is provided outside the lamp, for example, in a lighting fixture or the like, so that a DC voltage is supplied to the base of the LED lamp. Development is underway.

JP 2008-103304 A JP 2009-266432 A JP 2008-282793 A

  By the way, since the heat sink is made of aluminum and has conductivity, it is not grounded in a state where the LED lamp is attached to the lighting fixture. Therefore, when current leaks from the LED module or the lighting fixture to the heat sink, touching the heat sink may cause an electric shock. In particular, in the case of a DC lighting type LED lamp, the ground voltage of the heat sink is a simple sum of the power supply voltage and the lamp voltage, which is larger than the effective value of the ground voltage in the case of an AC lighting type LED lamp. There is a great risk of

  In view of the above problems, an object of the present invention is to provide a DC lighting type LED lamp and a lighting fixture that are less likely to cause an electric shock.

  In order to achieve the above object, a straight tube fluorescent lamp type LED lamp according to the present invention is a straight tube fluorescent lamp type LED lamp which is attached to a lighting fixture having a base socket and a ground terminal receiving jig and is dc-lit. An LED module in which a plurality of LEDs are mounted on a long substrate along the longitudinal direction thereof, a cover formed of a light-transmitting material, the LED module being housed therein, and a conductive member. A long outer shell composed of a pair of base pins disposed on one end side in the longitudinal direction of the outer shell and electrically connected to a pair of power supply terminals provided in the base socket, A base attached to the base socket, and a ground terminal disposed on the other end side in the longitudinal direction of the outer shell and electrically connected to the conductive member, and attached to the ground terminal receiving jig And a member And wherein the door.

The earth terminal receiving jig according to the present invention is an earth terminal receiving jig to which the earth member of the straight tube fluorescent lamp type LED lamp is attached, and has a conductive terminal electrically connected to the earth terminal. It is characterized by that.
Moreover, the lighting fixture according to the present invention is a lighting fixture to which the straight tube fluorescent lamp type LED lamp is attached, and a base socket to which the base is mounted and a ground terminal receiving jig to which the ground member is mounted. It is characterized by providing.

  In the LED lamp and the lighting fixture according to the present invention, a ground member having a ground terminal electrically connected to a conductive member constituting at least a part of the outer shell of the LED lamp is used as a ground terminal receiving jig of the lighting fixture. Since it is mounted, there is little risk of electric shock even if current leaks into the conductive member.

The partially broken top view which shows the LED lamp which concerns on this Embodiment AA line sectional view in FIG. BB sectional view in FIG. CC sectional view in FIG. The figure for demonstrating the attachment state to the lighting fixture of a LED lamp Circuit diagram of LED lamp and lighting fixture

Hereinafter, embodiments of an LED lamp and a lighting fixture according to the present invention will be described with reference to the drawings.
[Embodiment]
1 is a partially broken plan view showing an LED lamp according to the present embodiment, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. It is a figure and is CC sectional view taken on the line in FIG. 4, FIG.

  As shown in FIGS. 1 and 2, an LED lamp 100 according to the present embodiment is a straight tube fluorescent lamp type LED lamp that is a substitute for a straight tube fluorescent lamp, and includes an LED module 110, a heat sink 120, a cover. 130, a base 140, and a ground member 150. The heat sink 120 and the cover 130 constitute an outer shell 101 of the LED module 110.

  The LED module 110 has a long linear substrate 111, and a plurality of LEDs 113 are mounted on the mounting surface 112 of the substrate 111 along the longitudinal direction of the substrate 111, for example, in a straight line. One thermal fuse 114 and one current fuse 115 are mounted. The plurality of LEDs 113, temperature fuses 114, and current fuses 115 are electrically connected, for example, in series by a wiring pattern 116 formed on the mounting surface 112 of the substrate 111. For example, one LED 113 has a voltage of 3.3V, and when 30 LEDs are mounted and connected in series, the lamp voltage of the LED lamp 100 as a whole becomes 3.3V × 30 = 99V.

The substrate 111 may be, for example, a metal base printed wiring board, a glass composite substrate, a glass epoxy substrate, or the like. In order to efficiently conduct the heat generated in the LED 113 to the heat sink 120, it is preferable that the substrate 111 has high thermal conductivity.
The LED 113 is, for example, a surface mount (SMD) type white LED. Note that the LED 113 is not limited to a surface-mount type, and for example, an LED chip may be flip-chip mounted or wire-bonded mounted on the substrate 111, and the LED chip may be sealed with a phosphor-dispersed resin. In this case, for example, the LED chip emits blue light, the phosphor-dispersed resin is a silicone resin, and the phosphor is a yellow-green phosphor (for example, (Ba, Sr) ₂ SiO ₄ : Eu ²⁺ or Y ₃ ( _{al, Ga) 5 O 12:} Ce 3+) and red phosphor _{(Sr 2 Si 5 N 8:} Eu 2+ and (Ca, Sr) S: Eu 2+ and (Ba, Sr, Ca) AlSiN 3: Eu 2 ⁺ )).

  The heat sink 120 is made of, for example, long linear aluminum, and is arranged on the back surface 117 (the surface opposite to the mounting surface 112) of the substrate 111 so as to be aligned with the substrate 111 in the longitudinal direction. It is fixed to the substrate 111 by screwing or the like. The heat sink 120 and the LED module 110 are in thermal contact, and heat generated by the LED 113 is conducted to the heat sink 120 via the substrate 111 and is radiated from the heat sink 120 by radiation. By bringing the heat sink 120 and the substrate 111 into surface contact, a high heat dissipation effect can be obtained.

The heat sink 120 is not limited to an aluminum one, but preferably has good thermal conductivity and is lightweight. The heat sink 120 may have any shape, but preferably has a shape that does not block the light emitted from the LED module 110.
As shown in FIG. 3 and FIG. 4, the cover 130 is, for example, an elongated shape having a substantially arc-shaped cross section, and is arranged with the heat sink 120 aligned in the longitudinal direction, and has a pair of side end portions. By fitting the (short-side end portions) 131 and 132 into grooves 123 and 124 provided on the side surfaces 121 and 122 of the heat sink 120, the LED module 110 is attached to the heat sink 120.

The cover 130 is made of, for example, a resin such as polycarbonate or a light transmissive material such as glass. Note that glass is suitable as a material for the cover 130 because it has high thermal conductivity (about five times that of polycarbonate) and has a high heat dissipation effect for suppressing the temperature rise of the LED.
Returning to FIG. 2, the base 140 has a cap-shaped main body 141 and a pair of base pins 142 and 143, and is arranged on one end side in the longitudinal direction of the outer shell 101. The main body 141 is made of, for example, a heat-resistant synthetic resin such as silicon resin. The pair of cap pins 142 and 143 are made of metal such as aluminum or copper, for example, and are implanted in the main body 141 by press fitting so as to penetrate through holes 144 and 145 provided in the main body 141. The wiring pattern 116 and the lead wires 146 and 147 are electrically connected.

  The ground member 150 has a cap-shaped main body 151, a pair of ground terminals 152 and 153, and a conductive member 154, and is disposed on the other end side in the longitudinal direction of the outer shell 101. The main body 151 is made of a heat-resistant synthetic resin such as silicon resin, for example. The pair of ground terminals 152 and 153 are made of metal such as aluminum or copper, for example, and are implanted in the main body 151 by press-fitting so as to penetrate through holes 155 and 156 provided in the main body 151.

  The conductive member 154 is a substantially rectangular plate-like member having conductivity, and is disposed on the heat sink 120 side of the main body 151, and is fixed to the main body 151 by, for example, bonding or screwing. The conductive member 154 is provided with through holes 157 and 158 at positions corresponding to the through holes 155 and 156 of the main body 151, and the pair of ground terminals 152 and 153 are connected to the through holes 157 and 158 of the conductive member 154. In the inserted state, it is electrically connected to the conductive member 154 by, for example, soldering, welding, adhesion with a conductive adhesive, or the like.

  The conductive member 154 has a surface 159 on the heat sink 120 side in surface contact with the heat sink 120, and the conductive member 154 and the heat sink 120 are electrically connected by this contact. It should be noted that the electrical connection between the conductive member 154 and the heat sink 120 is not limited to a simple contact, and is connected not only electrically but also mechanically, for example, by soldering, welding, adhesion with a conductive adhesive, or the like. It may be a configuration.

Note that the conductive member 154 is not essential to the present invention, and the presence or absence of the conductive member 154 does not matter as long as the heat sink 120 and the ground terminals 152 and 153 are electrically connected. Therefore, for example, the ground terminals 152 and 153 and the heat sink 120 may be directly electrically connected.
FIG. 5 is a diagram for explaining an attachment state of the LED lamp to the lighting fixture. As shown in FIG. 5, the lighting fixture 200 includes a casing 210, a base socket 220, a lighting circuit 230, and a ground terminal receiving jig 240.

  The housing 210 has, for example, a substantially box shape with an open bottom surface, the top surface 211 is a mounting surface for a ceiling or the like, the inner surface 212 is a light reflecting surface, and the LED lamp 100 is housed inside. Has been. Further, a lighting circuit 230 is attached to the upper surface 211 of the housing 210, and a base socket 220 and a ground terminal receiving jig 240 are attached to the inside of the housing 210 so as to face each other.

The base socket 220 incorporates leaf spring-shaped power supply terminals 221 and 222 that are electrically connected to the base pins 142 and 143, and the base pins 142 and 224 are provided in the pin holes 223 and 224 provided in the base socket 220. When the terminal 143 is inserted, the base pins 142 and 143 and the power supply terminals 221 and 222 are electrically connected.
The lighting circuit 230 converts an AC voltage from a commercial AC power source into a DC voltage, supplies the DC voltage to the base 140 of the LED lamp 100 via the base socket 220, and turns on the LED 114. The lighting circuit 230 and the commercial AC power supply are connected via a power supply line 231, and the lighting circuit 230 and the pair of power supply terminals 221 and 222 of the base socket 220 are connected via a power supply line 232. Yes. Note that the power supply line 232 branches from the power supply terminals 221 and 222 into two wirings 232a and 232b, and is electrically connected to the power supply terminals 221 and 222, respectively.

FIG. 6 is a circuit diagram of an LED lamp and a lighting fixture. In the figure, the number of LEDs 114 is omitted. As shown in FIG. 6, the lighting circuit 230 includes a constant current DC circuit 233, for example. Note that the constant current DC circuit 233 may be configured using, for example, a rectifier diode or a smoothing capacitor.
Returning to FIG. 5, the ground terminal receiving jig 240 includes leaf spring-like conductive terminals 241 and 242 that are electrically connected to the ground terminals 152 and 153. When the ground terminals 152 and 153 are inserted into the terminal holes 243 and 244 formed, the ground terminals 152 and 153 and the conductive terminals 241 and 242 are electrically connected.

The conductive terminals 241 and 242 are grounded via a ground wire 245. The ground wire 245 branches from the conductive terminals 241 and 242 into two conductive wires 245a and 245b, and is electrically connected to the conductive terminals 241 and 242 respectively.
The ground terminal receiving jig 240 is held by a jig holding member 250 attached to the inner surface 212 of the housing 210. The jig holding member 250 restricts the movement of the ground terminal receiving jig 240 in the longitudinal direction of the lamp and the biasing bodies 251 and 252 that bias the ground terminal receiving jig 240 toward the cap socket 220 side. And claw portions 253 and 254 fitted in the slit grooves 246 and 247 of the ground terminal receiving jig 240, and the ground terminal receiving jig 240 is slidable with respect to the jig holding member 250.

  When attaching the LED lamp 100 to the lighting fixture 200, first, the earth terminal 150 is attached to the earth terminal 150 while the earth terminals 152 and 153 of the earth member 150 are inserted into the terminal holes 243 and 244 of the earth terminal receiver jig 240. Move in a direction away from the base socket 220. Thereby, the distance between the ground terminal receiving jig 240 and the base socket 220 is increased. Next, the LED lamp 100 is moved to the base socket 220 side, the base pins 142 and 143 of the base 140 are inserted into the pin holes 223 and 224 of the base socket 220, and the base 140 is attached to the base socket 220. Since the ground terminal receiving jig 240 is biased toward the base socket 220 by the biasing bodies 251 and 252, the LED lamp 100 is held by the ground terminal receiving jig 240 and the base socket 220.

By mounting the LED lamp 100, the base pins 142 and 143 and the power supply terminals 221 and 222 are electrically connected, so that a DC voltage is input from the lighting fixture 200 to the base 140. The heat sink 120 is grounded via the conductive member 154, the ground terminals 152 and 153, the conductive terminals 241 and 242, and the ground wire 245.
Since the heat sink 120 is made of aluminum, it has conductivity. Therefore, current may flow through the heat sink 120 due to leakage of the LED module 110 or the lighting circuit 230. However, when the LED lamp 100 is attached to the lighting fixture 200, the heat sink 120 is grounded and has no potential. Therefore, there is no electric shock even when the heat sink 120 is touched.

Even when the cover 130 is made of a conductive material, since the cover 130 is attached to the heat sink 120, it is in a grounded state, and there is no fear of electric shock even if the cover 130 is touched.
[Modification]
As mentioned above, although the LED lamp and lighting fixture which concern on this invention have been concretely demonstrated based on embodiment, the LED lamp and lighting fixture which concern on this invention are not limited to said embodiment. For example, the following modifications can be considered.

In the above embodiment, the outer shell is constituted by the heat sink as the conductive member and the cover, but the outer shell according to the present invention is not limited to this configuration, and at least a part is constituted by the conductive member. It only has to be done. Therefore, the entire outer shell may be a conductive member. Moreover, the structure which an outer shell does not function as a heat sink at all may be sufficient.
In the above embodiment, the ground member has a pair of ground terminals, but the number of ground terminals is not limited to a pair, that is, two, and may be one or more than three. Further, the number of conductive terminals of the earth terminal receiving jig is not limited to a pair, that is, two, and may be one or more than three.

  In the said embodiment, although the LED module was comprised with one board | substrate, you may comprise not only this but an LED module by electrically connecting and connecting two or more board | substrates. Moreover, in the said embodiment, although several LED was provided in the board | substrate on the board | substrate, you may line up in 2 or more rows without limiting to this. Further, the number of LEDs constituting the LED module is also arbitrary. Furthermore, in the above embodiment, all of the plurality of LEDs are connected in series. However, the present invention is not limited to this, and a predetermined number of LEDs connected in series are connected in parallel, or a predetermined number of LEDs are connected in parallel. You may connect what was connected in series, what is called series-parallel connection.

  You may apply | coat a light-scattering agent to the inner peripheral surface or outer peripheral surface of a cover. For example, alumina powder as a light scattering agent may be applied to the inner peripheral surface. Thereby, the light from the LED is diffused and made uniform and emitted from the cover, and the heat dissipation is improved by the heat conduction effect of the alumina powder.

  The LED lamp and the lighting fixture according to the present invention can be suitably used for, for example, a straight tube fluorescent lamp type LED lamp used as an alternative illumination of a straight tube fluorescent lamp.

100 LED lamp 101 Outer shell 110 LED module 111 Substrate 113 LED
117 Opposite surface 120 Conductive member (heat sink)
140 Base 142,143 Base Pin 150 Ground Member 152,153 Ground Terminal 200 Lighting Equipment 220 Base Socket 221, 222 Feed Terminal 240 Ground Terminal Receiving Jig 241,242 Conductive Terminal

Claims (5)

It is a straight tube fluorescent lamp type LED lamp that is attached to a lighting fixture having a base socket and a ground terminal receiving jig and is lit by direct current,
An LED module in which a plurality of LEDs are mounted along the longitudinal direction on a long substrate;
The LED module is housed inside, and an elongate outer shell composed of a cover formed of a translucent material and a conductive member;
A pair of base pins disposed on one end side in the longitudinal direction of the outer shell and electrically connected to a pair of power supply terminals provided in the base socket; a base attached to the base socket;
An earth member disposed on the other longitudinal end of the outer shell, having an earth terminal electrically connected to the conductive member, and attached to the earth terminal receiving jig;
A straight tube fluorescent lamp type LED lamp characterized by comprising:   The straight tube fluorescent lamp type LED lamp according to claim 1, wherein the conductive member is a heat sink in thermal contact with the LED module. An earth terminal receiving jig to which the earth member of the straight tube fluorescent lamp type LED lamp according to claim 1 or 2 is attached,
An earth terminal receiving jig having a conductive terminal electrically connected to the earth terminal. A lighting fixture to which the straight tube fluorescent lamp type LED lamp according to claim 1 or 2 is attached,
A lighting fixture comprising: a base socket to which the base is mounted; and a ground terminal receiving jig to which the ground member is mounted. The base socket is a mounting structure for rotating and mounting the base, and has the pair of power supply terminals for supplying power to the pair of base pins,
The pair of power supply terminals are not electrically connected to the pair of base pins before the base is rotated, and are electrically connected to the pair of base pins after the base has been rotated. The lighting fixture according to claim 4, wherein the lighting fixture is arranged.

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