JP2012216302A - Straight-tube lamp and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a straight-tube lamp with radiation properties toward outside improved as well as a lighting fixture using the lamp.SOLUTION: The lamp includes a straight-tube cover 21 at least partly equipped with a translucent part 21b with end parts open, inside which 21 are housed a substrate 26 having a light source part 25 arranged and a mounting plate 27 for fixing the substrate 26. Caps 30, 40 are provided at an end part of the straight-tube cover 21. The caps 30, 40 are structured with bottomed cylindrical body parts 31, 41 with one end open, and lamp pins 32, 42 arranged to the body parts 31, 41 in protrusion toward inside and outside. Further, insertion-coupling holes 28b are formed for the lamp pins 32, 42 protruded toward inside of the caps 30, 40 to be insertion-coupled, and at the same time, a heat conduction member 28 is provided to be thermally connected with the mounting plate 27 when the caps 30, 40 are fixed to the mounting plate 27.

Description

  Embodiments of the present invention relate to a straight tube lamp provided with a base at both ends, each having a lamp pin that engages with a socket of the lighting fixture, and a lighting fixture using the lamp.

  In general, a straight tube type fluorescent lamp having a G13-type base projecting from a pair of lamp pins having a circular cross section at both ends and a lighting device using a socket to which the fluorescent lamp is connected are often used.

  Also, a straight tube lamp using an LED element has been proposed. In this straight tube type lamp, the lamp pin of the G13 type base as in the past or the lamp pin having one end side formed in an L shape is used for mechanical holding and power supply of the lamp, or the lamp pin is only mechanically held and has a separate connector, etc. A method for supplying power to the lamp has been proposed.

Utility Model Registration No. 3152509

  In these lamps, when the substrate on which the LED is mounted is accommodated in the cover, it is difficult to dissipate heat to the outside of the lamp.

  The problem to be solved by the present invention is to provide a straight tube lamp capable of radiating heat to the outside of the lamp and a lighting fixture using the lamp.

  The straight tube lamp of the embodiment has a straight tube cover having a light transmitting portion at least in part and having an open end, and a substrate having a light source portion disposed in the straight tube cover and the substrate. A mounting plate to be fixed is accommodated. A base is provided at the end of the straight pipe cover. The base has a bottomed cylindrical main body portion that is open on one side, and a lamp pin that is disposed on the main body portion and protrudes inward and outward. In addition, a fitting hole into which the lamp pin protruding inside the base is fitted is formed, and a heat conducting member that is thermally connected to the mounting plate when the base is fixed to the mounting plate is provided.

  According to the present invention, heat dissipation to the outside of the lamp can be improved.

It is a perspective view of the straight tube | pipe lamp which shows 1st Embodiment. It is a front view when a base is removed from a straight tube type lamp same as the above. It is a rear view which shows the inner side of the nozzle | cap | die for electric power feeding of a straight tube | pipe type lamp same as the above. It is a partial cross section figure which shows the nozzle | cap | die side for electric power feeding of a straight tube | pipe type lamp same as the above. It is a front view which shows the outer side of the nozzle | cap | die for electric power feeding of a straight tube | pipe type lamp same as the above. It is a rear view which shows the inner side of the nozzle | cap | die for the earthing | grounding of a straight tube | pipe type lamp same as the above. It is a partial cross section figure which shows the nozzle | cap | die side for earthing | grounding of a straight tube | pipe type lamp same as the above. It is a front view which shows the outer side of the nozzle | cap | die for grounding of a straight tube | pipe type lamp same as the above. It is a perspective view of an illuminating device same as the above. It is a rear view which shows the inner side of the feed cap of the straight tube | pipe type lamp which shows 2nd Embodiment.

  Hereinafter, the first embodiment will be described with reference to FIGS.

  FIG. 9 shows an illuminating device 10 which is an embedded illuminating device of a type with two straight tube lamps. In this illuminating device 10, two straight tube lamps 20 are used.

  The luminaire 10 is an elongated lower-side fixture body 11 that is embedded in a ceiling surface, and is disposed opposite to both ends in the longitudinal direction of the fixture body 11 so that the ends of the straight tube lamps 20 are respectively mounted. Two sets of sockets 13 and 14 and a lighting device 12 that is disposed in the fixture body 11 and lights up the straight tube lamp 20. The socket 13 on one end for mounting one end of the straight tube lamp 20 is the non-power-supply side and the ground side, and the socket 14 on the other end for mounting the other end of the straight tube lamp 20 is for power supply. is there. Note that the socket 13 on the ground side may be used for both ground connection and attachment of the straight tube lamp 20 or only for attachment of the straight tube lamp 20, and either one may be used.

  The sockets 13 and 14 are rotationally mounted so that the earth pins 42 and the power supply pins 32 as lamp pins are inserted from the front end surfaces of the sockets 13 and 14 and rotated by 90 ° about the tube axis of the straight tube lamp 20. Is used.

Further, the lighting device 12 shown in FIG. 9 receives a commercial AC power supply, converts AC power into DC power, and converts the DC power into a pair of feeding terminals of a socket 14 for feeding and a pair of straight tube lamps 20. The light is supplied to the light source unit 25 through a power supply pin 32 as a lamp pin. Then, the light source unit 25 is turned on, and light from the light source unit 25 passes through the translucent cover 21 and is irradiated in a predetermined irradiation direction below the lighting fixture 10.

  As shown in FIG. 1, the straight tube lamp 20 is formed in a straight tube shape with a tube length and a tube diameter similar to that of the arc tube of a straight tube fluorescent lamp, and transmits light as a straight tube cover having translucency. The transparent cover 21, the light source unit 22 accommodated in the translucent cover 21, and the caps 30 and 40 provided at both ends of the translucent cover 21 are provided. The light source unit 22 includes a mounting plate 27 and a substrate 26 on which the light source unit 25 is disposed. In the light source unit 22, the mounting plate 27 is made of a metal having good thermal conductivity such as aluminum and having strength. The cap 40 on one end side of the straight tube lamp 20 is a ground side which is a non-power-feeding side attached to the socket 13 on the ground side, and the cap 30 on the other end side of the straight tube lamp 20 is connected to the socket 14 for power feeding. For power supply to be installed. On the base 30 side, a heat conducting member 28 having a substantially rectangular shape and a flat plate shape is disposed. Note that the ground-side cap 40 may be attached to the socket 13 or may be attached only to the socket 13 either.

  FIG. 2 is a front view when the caps 30 and 40 are removed from the straight tube lamp 20. 2 shows a state when the end portion of the straight tube lamp 20 is viewed from the other end side to which the base 30 is attached, but the same configuration is also seen when viewed from one end side to which the base 40 is attached. .

  The translucent cover 21 is made of a translucent material and is formed in a cylindrical shape with open ends on one end side and the other end side. Convex protrusions 21a extending in the longitudinal direction are provided on the inner peripheral surface so as to approach each other from a position facing each other.

The light emitting unit 25 can use a COB (Chip On Board) method in which a plurality of semiconductor light emitting elements such as LED elements and EL elements are mounted on the substrate 26. For example, the blue semiconductor light emitting element 25a mounted on the substrate 26 is yellow. The phosphor layer 25b is configured to emit white light. The light emitting unit 25 includes a plurality of SMDs (Surface Mounts) having connection terminals in which LED chips are mounted on a substrate 26.
(Device) package mounting method may be used.

  The mounting plate 27 is formed in a substantially semi-cylindrical shape, and the side edge portion 27a is engaged with the protruding portion 21a and is accommodated in a predetermined position in the translucent cover 21. Further, at the center of the mounting plate 27, facing the outside from the end of the translucent cover 21, a pair of fixing holes 27b, 27b and a communication portion penetrating in the longitudinal direction so as to communicate with the fixing holes 27b, 27b 27c is formed. On the flat surface portion 27d of the mounting plate 27, a substrate 26 having a light source portion 25 disposed on one surface side is disposed. A groove 27e is formed on the side of the flat portion 27d in the longitudinal direction, and a board 26 is fixed to the mounting plate 27 by attaching a screw (not shown) to the groove 27e, The flat portion 27d is brought into close contact, and the substrate 26 and the mounting plate are thermally connected. The translucent cover 21 only needs to have at least part of the translucent part 21b, and the substrate 26 is fixed to the mounting plate 27 so that the light emitted from the light source part 25 is emitted from the translucent part 21b. Is done.

  As shown in FIGS. 3 to 5, the power supply base 30 includes a bottom wall 31a, a side wall 31b projecting in an annular shape from the periphery of the bottom wall 31a, and a bottomed cylindrical main body 31 having one open side. is doing. The main body 31 is made of a synthetic resin such as polycarbonate (PC) or polybutylene terephthalate (PBT). In addition, there is no particular limitation as long as it is a material that can withstand the temperature during lighting and the lamp holding. FIG. 4 is a partial cross-sectional view showing the feeding base 30 side in the AA cross section of FIG. In the following description, the side where the base and the translucent cover 21 face each other is the inside, and the side facing the socket when attached to the lighting fixture is the outside.

  On the outer end surface of the bottom wall 31a, a step portion 31c that is one step higher than the surroundings is formed, and a pair of power supply pins 32 that are electrically connected to the light source unit 22 project from the step portion 31c. .

  A pin support portion 33 that protrudes from the inside of the main body 31 and covers the power supply pin 32 and a pair of fixing portions 34 and 34 are formed inside the base 30. The power feed pin 32 protrudes further inward than the pin support portion 33. In addition, the fixing portion 34 is provided with a through hole 35 that communicates between the outside and the inside.

  Further, a heat conduction member 28 made of silicone or synthetic resin having heat conductivity and electrical insulation is disposed inside the base. The heat conducting member 28 has a pair of fitting holes 28b into which the flat main body 28a and the power supply pin 32 are fitted. The fitting hole 28b is slightly smaller than the outer dimension of the power supply pin 32, and the power supply pin 32 is press-fitted into close contact with the power supply pin 32 to be thermally connected.

  Then, the base 30 and the mounting plate 27 are fixed by attaching the fixture 38 to the fixing hole 27b of the mounting plate 27 through the through hole 35 from the outside of the base 30. At this time, the heat conducting member 28 is in pressure contact with the mounting plate 27 and thermally connected. As a result, the heat generated in the light source unit 25 is radiated to the outside of the lamp via the substrate 26, the mounting plate 27, the heat conducting member 28, and the power supply pin 32. The translucent cover 21 is not fixed to the mounting plate 27 and the base 30 and is allowed to move in the longitudinal direction. As shown in FIGS. 3 and 4, a pair of regulating portions 39 are provided on the inner side of the base 30 so as to be spaced apart from the side wall 31 b with a width that is wider than the thickness of the translucent cover 21. The translucent cover 21 can be guided when the base 30 is attached to the translucent cover 21, and the movement range of the translucent cover 21 can be restricted after the translucent cover 21 is attached.

  Next, the installation base side will be described with reference to FIGS. 7 is a partial cross-sectional view showing the grounding base 40 side in the AA cross section of FIG. The base 40 for grounding includes a bottom wall 41a, a side wall 41b projecting annularly from the periphery of the bottom wall 41a, and a bottomed cylindrical main body 41 with one open, a lamp pin protruding from the outer central portion of the main body 41 As shown in FIG. The earth pin 42 has a shaft portion 42a and an elliptical plate-shaped tip portion 42b formed at the tip of the shaft portion 42a. Further, a pin support portion 43 and a pair of fixing portions 44 and 44 that protrude from the inside and cover the ground pin 42 are formed inside the main body portion 41. Further, the fixing portion 44 is provided with a through hole 45 that communicates between the outside and the inside.

  Then, the base 40 and the second mounting body 29 are fixed by attaching the fixture 48 to the fixing hole 27b from the outside of the base 40 through the through hole 45 in a state where the base 40 is supported by the second mounting body 29. The The translucent cover 21 is not fixed to the mounting member 27 and the base 40 and is allowed to move in the longitudinal direction. Similarly to the base 30, the base 40 is also formed integrally with the rib 41 c at three locations inside the base 40, which are arranged on the inner side of the base 40 so as to be separated from the side wall 41 b by a distance larger than the thickness of the translucent cover 21. A restricting portion 49 is provided to guide the translucent cover 21 when attaching the cap 40 to the translucent cover 21 and to restrict the movement range of the translucent cover 21 after being attached.

  Next, a procedure for assembling the straight tube lamp 20 will be described.

  First, the plurality of substrates 26 on which the light source unit 25 is mounted on the long attachment plate 27 are fixed by a fixing means (not shown). Each board is electrically connected by connecting means such as a connector or a lead wire. At this time, one end of the light source unit 22 is a non-feeding side, and the other end is a feeding side. The light source unit 22 configured as described above is inserted from one opening of the translucent cover 21. At this time, the side edge portion 27a of the mounting plate 27 is engaged with the protruding portion 21a of the translucent cover 21, that is, formed by a pair of opposing protruding portions 21a, 21a and a part of the translucent cover 21. The light source unit 22 is accommodated in the space. Note that the translucent cover 21 and the light source unit 22 have a slight gap in consideration of design errors, thermal contraction of the translucent cover 21 during lighting, assemblability, and the like. That is, the light source unit 22 and the translucent cover 21 are not fixed and are configured to allow a relatively slight movement.

  Next, the base 30 is disposed on the power supply side of the light source unit 22, and the base 40 is disposed on the non-power supply side. Here, in the operation of attaching the base 30 to the mounting plate 27, first, the power supply pin 32 is press-fitted into the fitting hole 28b of the heat conducting member 28, and the base 30 and the heat conducting member 28 are integrated. Then, the base 30 is attached to the other end of the translucent cover 21 by fixing the fixture 38 to the fixing hole 27 from the outside of the base 30 through the through hole 35 and fixing the base 30 to the light source unit 22. . Note that the electrical connection between the power supply pin 32 of the base 30 and the light source unit 22 may be performed simultaneously with the mounting work of the base 30 by providing a connector means (not shown) for the substrate 26, or a lead wire or the like. You may connect beforehand by the connection means.

  The base 40 is similarly fixed to the light source unit 22 on the other end side. The ground pin 42 may or may not be grounded to the light source unit 22. If the earth pin 42 is not grounded, the earth pin 42 will only mechanically hold the straight tube lamp 20.

  In the straight tube lamp 20, the longitudinal direction of the tip end portion 42b of the ground pin 42 is aligned with the direction in which the pair of power supply pins 32 are aligned, and the surface parallel to these directions and the semiconductor light emission of the light source unit 22 The light emitting surface of the element 25 is provided in parallel. That is, in a state where the straight tube lamp 20 is correctly mounted between the sockets 13 and 14, light from the light emitting surface of the semiconductor light emitting element 25 of the light source unit 22 is emitted from the light transmitting portion of the light transmitting cover 21 in a predetermined irradiation direction. It is provided so that it can be irradiated.

  Thus, by interposing the heat conducting member 28 inside the base 30, the heat generated in the light source unit 25 is transferred to the outside of the lamp through the substrate 26, the mounting plate 27, the heat conducting member 28, and the power feeding pin 32. It can dissipate heat. In addition, since the heat conducting member 28 is provided with the fitting hole 28b for fitting with the power feeding pin 32, the power feeding pin 32 can be press-fitted and the thermal conductivity between the heat conducting member 28 and the power feeding pin 32 can be improved. At the same time, when the base 30 is attached to the end portion of the translucent cover 21, the attachment work can be performed with the base 30 and the heat conducting member 28 being integrated. In addition, since the heat conducting member 32 has insulating properties, it can be fitted with both the power supply pins 32, and a metal member having good heat conductivity can be used for the mounting plate 27, so that heat dissipation. Can be improved.

 In the present embodiment, the case where the heat conducting member 28 is provided on the power feed pin 32 side has been described, but the same effect can be obtained even if the heat conducting member is provided on the ground pin 42 side.

  Next, a second embodiment will be described with reference to FIG. The configuration of the reinforcing portion is different from that of the first embodiment, and detailed description of other common configurations is omitted.

  Similar to the first embodiment, the power supply base 300 includes a power supply pin 332, a pin support portion 333, a fixing portion 334, a through hole 335 provided inside the fixing portion 334, and a restriction portion 339. The heat conducting member 28 in the second embodiment has a trapezoidal body part 28a in front view and a fitting hole 28b into which the power feed pin 332 is fitted, and is opened at a position facing the through hole 335. A portion 28c is formed. The opening 28c is formed to be slightly smaller than the diameter dimension of the through hole 335 and the fixture 38 penetrating the through hole 335. When the base 30 is fixed to the mounting plate 27, the main body 28a is held between the fixing portion 334 and the mounting plate 27. As a result, the heat conducting member 28 is firmly attached to the mounting plate 27 when the fixture 38 is fixed to the fixing hole 27b. In addition, since the opening 28c is formed slightly smaller than the diameter of the fixture 38, the fixture 38 can be temporarily fixed when the fixture 38 is attached from the outside of the base 300, thereby improving the assembly workability. Can be made.

Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 ... Lighting fixture, 11 ... Body body, 13,14 ... Socket, 20 ... Straight tube lamp, 21 ... Translucent cover, 21b ... Translucent portion, 25 ... Light source portion, 26 ... Substrate, 27 ... Mounting plate, 28 ... Heat conducting member, 30 ... Power supply base, 31,41 ... Main body, 32 ... Power supply lamp pin, 40 ... Grounding base, 42 ... Ground lamp pin

Claims (3)

A straight pipe cover having a light transmitting part at least in part and having an open end;
A mounting plate accommodated in the straight pipe cover and arranged outward from the end of the straight pipe cover;
A substrate provided with a light source part, and fixed to the mounting plate so that light emitted from the light source part is emitted from the light transmitting part;
A bottomed cylindrical main body having one open side, a lamp pin disposed on the main body and projecting inward and outward, fixed to the mounting plate, and disposed on an end of the straight tube cover With a base;
A fitting hole into which a lamp pin protruding inside the base is fitted is formed,
A heat conducting member thermally connected to the mounting plate when the base is fixed to the mounting plate;
A straight tube lamp characterized by comprising:
The straight tube lamp according to claim 1, wherein the heat conducting member is thermally connected to the mounting plate by being sandwiched between the base and the mounting plate. An instrument body;
A socket disposed in the instrument body;
A straight tube lamp according to claim 1 or 2, wherein a lamp pin is supported and attached to the socket;
The lighting fixture characterized by comprising.

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