JP2012226958A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture that can easily change a position of a light source unit and secure sufficiently adhesion of the light source unit and a heat radiation member.SOLUTION: The lighting fixture includes an LED unit 1 having an LED chip 10 as a light source, a heat radiator 3 which is in contact with the LED unit 1 and radiates heat generated from the LED chip 10, and a fixture body 2 which houses the LED unit 1 and the heat radiator 3. The LED unit 1 is fitted inside the fixture body 2 by locking a locking pawl 17 provided in itself to an installation groove 21 provided inside the fixture body 2, and a pair of coil springs 4 for energizing the heat radiator 3 toward the direction for pressing the LED unit 1 are further provided.

Description

  The present invention relates to a luminaire using a solid light emitting element such as a light emitting diode (LED) as a light source.

  2. Description of the Related Art Conventionally, there has been known a lighting fixture in which an LED bulb is brought into contact with a component of a lighting fixture and heat of the LED bulb is radiated by heat conduction from the contact portion to the lighting fixture. As shown in FIG. 4A, the conventional example described in Patent Document 1 includes a hollow cylindrical light source fixture 100 having one end opened, an LED light source body 101, and a cylindrical instrument body 102. It is attached to the instrument mounting plate 103. The LED light source body 101 includes a base 104, a substrate 105, and an LED 106.

  The instrument main body 102 has a socket 107 on the outer side in the central portion of the flat surface portion 102A. The socket 107 has a metal receiving member that is mechanically and electrically connected to the base 104 and supplies power to the LED light source body 101. The appliance main body 102 is fixed to an appliance attachment plate 103 such as a ceiling material by screws 108 such as wood screws and metal screws, or other attachment means such as rivets, adhesive tapes, and adhesive materials. The light source mounting tool 100 is fixed to the instrument main body 102 by mounting means such as screws, rivets, adhesive tape, and adhesive. A socket 107 is positioned inside the light source fixture 100 fixed to the instrument body 102. The LED light source body 101 is electrically and mechanically coupled to the socket 107 by rotating the base 104.

  Then, by attaching the LED light source body 101 to the socket 107, the substrate 105 of the LED light source body 101 comes into contact with the flat portion 100 </ b> A of the light source fixture 100. At this time, the heat generated from the LED 106 is conducted from the substrate 105 to the flat portion 100A of the light source fixture 100, and the heat transferred to the flat portion 100A is conducted to the instrument body 102. Therefore, the heat generated in the LED 106 can be efficiently radiated, and the temperature of the LED light source body 101 can be sufficiently lowered.

  Here, in order to increase the thermal conductivity from the LED light source body 101 to the light source fixture 100, the adhesion between the LED light source body 101 and the light source fixture 100 may be increased. However, when the LED light source body 101 is rotated and the base 104 is strongly inserted into the socket 107 in order to improve the adhesion between the LED light source body 101 and the light source fixture 100, a strong force is applied to the contact end portion between the substrate 105 and the base 104. Will be added. Then, it is conceivable that an electrical connection failure occurs at the contact end portion and the LED light source body 101 breaks down. Therefore, in the conventional example described in Patent Document 1, the LED light source body 101 and the light source fixture 100 are in close contact with each other by having the auxiliary body 109 that presses the LED light source body 101 against the flat surface portion 100A of the light source fixture 100 from the outside. Increases sex.

  Hereinafter, a configuration using the auxiliary body 109 will be described with reference to the drawings. As shown in FIG. 4B, this configuration includes a hollow cylindrical auxiliary body 109 having one end opened. The auxiliary body 109 is slightly larger than the light source fixture 100 and can be put on the light source fixture 100. The auxiliary body 109 has a side surface portion 109A and a flat surface portion 109B, and the side surface portion 109A has a threaded portion 109C that forms a spiral groove. Further, the flat portion 109B of the auxiliary body 109 has a through hole 109D in the center. The light source fixture 100 has a threaded portion 100C that forms a spiral groove in the side surface portion 100B. The threaded portion 100C is paired with the threaded portion 109C of the auxiliary body 109.

  The LED light source body 101 has a pin-type base 110 on the substrate 105 instead of the screw-type base 104. The instrument body 102 has a through hole 102B in the center of the flat surface portion 102A, and a connector 111A connected to the electric cord 111 is exposed to the outside through the through hole 102B. The connector 111A is connected from the light source fixture 100 through the through hole 102B to the base 110 of the LED light source body 101.

  The auxiliary body 109 is mechanically coupled to the light source fixture 100 so as to cover the periphery of the LED light source body 101 by covering the light source fixture 100 and rotating it in the direction of the arrow shown in FIG. At this time, the auxiliary body 109 is in contact with the peripheral edge of the substrate 105 of the LED light source body 101 at the end of the flat portion 109B on the through-hole 109D side and presses the substrate 105 of the LED light source body 101 against the planar portion 100A of the light source fixture 100. To do. Thereby, the auxiliary body 109 can improve the adhesion between the LED light source body 101 and the light source fixture 100.

JP 2007-273209 A

  However, in the above conventional example, since the positional relationship between the LED light source body 101 and the light source fixture 100 is fixed, the position of the LED light source body 101 cannot be changed, and therefore it is difficult to change the light distribution. There is a problem that.

  In the conventional example, when the LED light source body 101 is attached to the light source fixture 100, the screw-type base 104 is inserted into the socket 107, or the threaded portion of the auxiliary body 109 is inserted into the threaded portion 100 </ b> C of the light source fixture 100. An operation of screwing 109C is required. For this reason, since it is left to the operator to adjust the insertion and screwing, for example, when the LED light source body 101 is replaced, the adhesion between the LED light source body 101 and the light source fixture 100 is ensured depending on the construction of the operator. There is a problem that a sufficient heat dissipation effect cannot be obtained.

  The present invention has been made in view of the above points, and provides a lighting apparatus that can easily change the position of the light source unit and can sufficiently secure the adhesion between the light source unit and the heat dissipation member. With the goal.

  The lighting fixture of the present invention includes a light source unit having a solid light-emitting element as a light source, a heat radiating plate that contacts the light source unit and dissipates heat generated from the light source, and a fixture main body that houses the light source unit and the heat radiating plate. The light source unit includes an attachment means for attaching the light source unit to the inside of the instrument body, and an urging means for elastically urging the heat radiating plate in a direction in which the light source unit is pressed.

  In this lighting fixture, the mounting means includes a locking claw provided in the light source unit and a mounting groove provided in the fixture main body and locked by the locking claw. It is preferable that a plurality of the heat dissipating plates are provided along the direction of elastically urging the inner peripheral surface of the main body.

  In this lighting apparatus, it is preferable that a reflection plate that reflects light emitted from the light source and emits the light to the outside of the apparatus body is provided separately from the light source unit.

  The present invention has an effect that the position of the light source unit can be easily changed and the adhesion between the light source unit and the heat radiating member can be sufficiently secured.

It is sectional drawing which shows embodiment of the lighting fixture which concerns on this invention. It is sectional drawing which shows the other structure of the lighting fixture same as the above. (A), (b) is sectional drawing which shows other structure of the lighting fixture same as the above. (A), (b) is the schematic which shows the conventional lighting fixture.

  Hereinafter, embodiments of a lighting apparatus according to the present invention will be described with reference to the drawings. In the following description, the vertical and horizontal directions in FIG. 1 are defined as the vertical and horizontal directions. In the present embodiment, for example, an LED unit 1 (light source unit) having a substrate 12 on which an LED chip 10 (light source) is mounted, as shown in FIG. 1 is provided with a bottomed tubular instrument body 2 that houses 1 inside. Further, in the present embodiment, a heat radiating plate 3 that radiates heat generated by the LED chip 10 to the instrument body 2 and a pair of coil springs 4 that elastically urge the heat radiating plate 3 downward (toward the LED unit 1). (Biasing means).

  The LED unit 1 includes a rectangular plate-shaped LED chip 10 that emits blue light, a disk-shaped sealing member 11 that is made of a translucent resin material and seals the LED chip, and a substrate 12 on which the LED chip 10 is mounted. With. The sealing member 11 is mixed with a yellow phosphor (not shown) that emits yellow light that is excited by blue light emitted from the LED chip 10 and has a complementary color relationship with the blue light. Therefore, the LED unit 1 emits white light to the outside through a lens body 14 and an exit port 20 of the instrument body 2 described later.

  The LED unit 1 only needs to emit white light, and the configuration of emitting white light is not limited to the combination of the LED chip 10 emitting blue light and the yellow phosphor. . Of course, it is needless to say that the LED unit 1 may be changed to a configuration that emits light of a color other than white according to the purpose of illumination. In this embodiment, the LED chip 10 is used as the light source, but a chip made of another solid light emitting element such as an organic EL element may be used as the light source.

  On the upper surface of the substrate 12, a radiator 13 made of a material having high thermal conductivity and insulating properties is attached. The heat radiator 13 is preferably formed of fine ceramics (for example, aluminum nitride) in view of easy processing into a smooth flat surface with small flatness and high adhesion to the substrate 12. A base 15 made of a metal material having a high thermal conductivity is attached to the upper surface of the radiator 13. A bottomed cylindrical lens body 14 made of a translucent material is attached to the lower surface of the base portion 14, and light emitted from the LED chip 10 is emitted to the outside through the lens body 14. It has become so. The LED chip 10, the sealing member 11, the substrate 12, and the heat radiating body 13 are accommodated in a box formed by combining the base portion 15 and the lens body 14.

  Recesses 16 that are recessed inward are formed at the left and right ends of the base part 15, respectively. Locking claws 17 that are engaged with mounting grooves 21 of the instrument body 2, which will be described later, are respectively formed in these recessed parts 16. It is stored. Each recess 16 accommodates an auxiliary spring 18 that urges the locking claw 17 in a direction in which the locking claw 17 protrudes to the outside of each recess 16. In addition, in the vicinity of each recess 16 in the base portion 15, a lever (not shown) for storing each locking claw 17 in each recess 16 against the urging force of each auxiliary spring 18 is slidable. Is provided. Therefore, each latching claw 17 can be accommodated in each recess 16 by sliding the levers, and each latching claw 17 can be projected from each recess 16 by releasing the lever. In addition, it is desirable to expose each lever from the lower surface of the lower side of each recess 16 in the base portion 15 because it is easy for the operator to operate.

  The instrument main body 2 is formed in a bottomed cylindrical shape from a metal material having a high thermal conductivity, and is made of aluminum die casting in the present embodiment. The lower surface of the instrument main body 2 is opened, and the opening serves as an emission port 20 for emitting light emitted from the LED unit 1 to the outside. A plurality (three in the figure) of mounting grooves 21 that are recessed outward in the circumferential direction are formed on the inner peripheral surface of the instrument body 2, and these mounting grooves 21 are constant along the vertical direction. Are provided at intervals. A pair of mounting recesses 23 that are recessed downward are provided on the upper surface of the outer side of the instrument body 2 at regular intervals along the left-right direction. Further, at the bottom of each mounting recess 23, mounting holes 22 each having an internal thread portion (not shown) into which the mounting screw 5 is screwed are provided so as to penetrate in the vertical direction.

  The heat radiating plate 3 is formed in a bottomed cylindrical shape whose upper surface is opened from a heat-dissipating metal material, and the lower surface abuts on the base portion 15 of the LED unit 1. In addition, as a metal material which forms the heat sink 3, fine ceramics, such as aluminum, copper, iron, and aluminum nitride, for example, can be employed. Moreover, the heat radiating plate 3 is formed in a bottomed cylindrical shape to increase the heat radiating area. Two pairs of cylindrical bosses 30 projecting upward are provided on the inner bottom surface of the heat radiating plate 3, and one pair is provided on both sides along the left-right direction with a set interval. Yes. On the inner periphery of each boss portion 30, a female screw portion (not shown) to which the mounting screw 5 is screwed is formed.

  Moreover, although not shown in figure in the heat sink 3 and the base part 15 of the LED unit 1, respectively, the insertion hole for letting an electric wire pass is provided. An electric wire is passed through these insertion holes, and an electric wire is provided between a lighting device (not shown) installed outside the fixture body 2 and a connector (not shown) provided on the substrate 12 of the LED unit 1. The lighting power is supplied to the LED chip 10 by connecting.

  Here, a pair of coil springs 4 are provided between the upper surface on the inner side of the instrument body 2 and the inner bottom surface of the heat radiating plate 3 at a certain interval along the left-right direction. Disk-shaped iron plates 50 are welded to the upper and lower ends of each coil spring 4. Although not shown, one insertion hole for inserting the mounting screw 5 is provided for each iron plate 50 attached to the upper end portion of the coil spring 4 and two for each iron plate 50 attached to the lower end portion. It has been. In addition, the internal thread part (not shown) in which the attachment screw 5 screws together is formed in the internal peripheral surface of each insertion hole.

  Therefore, the upper end portion of each coil spring 4 is fixed by inserting the attachment screw 5 from above into the attachment hole 22 of the instrument body 2 and the insertion hole of the iron plate 50 and screwing them together. At this time, the head of each mounting screw 5 is housed in each mounting recess 23 so as not to protrude to the outside. Moreover, the lower end part of each coil spring 4 is fixed by inserting the attachment screw 5 into the insertion hole of the boss | hub part 30 of the heat sink 3, and the iron plate 50 from the upper side, and screwing together. Accordingly, the heat radiating plate 3 is elastically biased downward by each coil spring 4, that is, in a direction of pressing the LED unit 1.

  Hereinafter, the attachment method of the LED unit 1 of this embodiment is demonstrated. First, each lever is slid to house each locking claw 17 in each recess 16, and the LED unit 1 is moved to the position of the mounting groove 21 corresponding to the desired position. Next, when each latching claw 17 is adjusted to the same height as the mounting groove 21 and released from each lever, each latching claw 17 protrudes outward by the urging force of each auxiliary spring 18 and is engaged with the mounting groove 21. Stop. Thereby, the LED unit 1 is attached to the instrument main body 2.

  That is, each latching claw 17 of the LED unit 1 and each mounting groove 21 of the instrument body 2 constitute an attachment means for mounting the LED unit 1 at a desired position of the instrument body 2. In addition, when changing the mounting position of the LED unit 1, after each lever is slid to release the locking by the locking claws 17 and the LED unit 1 is moved to a desired position in the same manner as described above. Release your hands from each lever.

  A taper 17 </ b> A is formed on the upper surface of each locking claw 17 so as to contact the upper end portion inside each mounting groove 21 or the lower end portion inside the instrument body 2. For this reason, if the LED unit 1 is pushed upward, the upper end portion inside the mounting groove 21 or the lower end portion inside the instrument body 2 presses the taper 17A of each locking claw 17, and each locking claw 17 Since it is stored in the recess 16, the locking by each locking claw 17 can be released. Therefore, when changing the mounting position of the LED unit 1 upward, it is possible to change the mounting position by simply pushing the LED unit 1 upward without sliding each lever.

  When the LED unit 1 is attached to a desired attachment position of the appliance body 2, the LED unit 1 is moved upward to push the heat radiating plate 3 upward against the urging force of each coil spring 4. For this reason, after attaching the LED unit 1 to the instrument main body 2, the heat radiating plate 3 presses the LED unit 1 by the biasing force of each coil spring 4. Therefore, since the heat sink 3 is in close contact with the base portion 15 of the LED unit 1, the heat generated by the LED chip 10 is thermally conducted through the heat radiator 13, the base portion 15, and the heat sink 3, and the instrument body 2 is further connected. Heat is released into the atmosphere. In addition, the space above the heat radiating plate 3 in the appliance main body 2 becomes a heat radiating space for convection of heat from the LED chip 10 and can further enhance the heat radiating effect.

  As described above, in the present embodiment, the mounting position of the LED unit 1 can be easily changed by locking each locking claw 17 of the LED unit 1 in any mounting groove 21 of the instrument body 2. it can. Therefore, by changing the position of the LED unit 1, the positional relationship between the LED unit 1 and the emission port 20 of the instrument body 2 is also changed, so that the light distribution can be easily changed. Moreover, in this embodiment, since the heat sink 3 presses LED unit 1 with the urging | biasing force of each coil spring 4, it is LED unit regardless of the construction of an operator at the time of attachment or replacement | exchange of LED unit 1. 1 and the heat sink 3 can be sufficiently secured.

  By the way, instead of using the lens body 14, as shown in FIG. 2, a frame body 19 having a reflection portion 19 </ b> A that reflects light emitted from the LED chip 10 may be provided integrally with the LED unit 1. The frame 19 is formed in a cylindrical shape having an open bottom surface, and an inner peripheral surface thereof is a curved surface that expands in the radial direction from the LED chip 10 toward the opening on the bottom surface. This curved surface is painted white with, for example, a paint such as an acrylic paint, and constitutes a reflection portion 19A that reflects light emitted from the LED chip 10. Therefore, in this configuration, the light emitted from the LED chip 10 is reflected by the reflecting portion 19 </ b> A, so that the light is emitted substantially vertically downward from the emission port 20 of the instrument body 2.

  Further, as shown in FIGS. 3A and 3B, a reflector 6 that reflects light emitted from the LED chip 10 may be provided below the LED unit 1. The reflecting plate 6 is formed in a frustum shape having an upper surface and a lower surface opened, and an inner peripheral surface thereof is a curved surface that expands in a radial direction toward the upper surface or the lower surface. This curved surface is painted white with, for example, a paint such as an acrylic paint, and constitutes a reflective surface that reflects light emitted from the LED chip 10. Therefore, in this configuration, light emitted from the LED chip 10 is reflected by the inner peripheral surface of the reflecting plate 6, so that light is emitted substantially vertically downward from the emission port 20 of the instrument body 2. Moreover, in this structure, the LED unit 1 and the reflecting plate 6 are provided separately. For this reason, as shown in FIGS. 3A and 3B, the positional relationship between the LED unit 1 and the reflecting plate 6 is also changed by changing the mounting position of the LED unit 1, so that light distribution is easy. Can be changed.

1 LED unit (light source unit)
10 LED chip (light source)
17 Locking claw (mounting means)
2 Instrument body 21 Mounting groove (Mounting means)
3 Heat sink 4 Coil spring (biasing means)

Claims (3)

  A light source unit having a solid light emitting element as a light source, a heat radiating plate in contact with the light source unit to dissipate heat emitted from the light source, a fixture body housing the light source unit and the heat radiating plate, and the light source unit as the fixture An illuminating device, comprising: an attaching means for attaching to the inside of the main body; and an urging means for elastically urging the heat radiating plate in a direction of pressing the light source unit.   The mounting means includes a locking claw provided in the light source unit and a mounting groove provided in the instrument main body and locked by the locking claw, and the mounting groove is an inner peripheral surface of the instrument main body. The lighting fixture according to claim 1, wherein a plurality of the lighting plates are provided along a direction in which the heat radiating plate is elastically biased.   The reflector body according to claim 1 or 2, wherein a reflection plate that reflects light emitted from the light source and emits the light to the outside of the instrument body is provided separately from the light source unit. lighting equipment.

Images